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1401.2529
Elif Vural
Elif Vural and Pascal Frossard
A Study of Image Analysis with Tangent Distance
null
null
null
null
cs.CV
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The computation of the geometric transformation between a reference and a target image, known as registration or alignment, corresponds to the projection of the target image onto the transformation manifold of the reference image (the set of images generated by its geometric transformations). It, however, often takes a nontrivial form such that the exact computation of projections on the manifold is difficult. The tangent distance method is an effective algorithm to solve this problem by exploiting a linear approximation of the manifold. As theoretical studies about the tangent distance algorithm have been largely overlooked, we present in this work a detailed performance analysis of this useful algorithm, which can eventually help its implementation. We consider a popular image registration setting using a multiscale pyramid of lowpass filtered versions of the (possibly noisy) reference and target images, which is particularly useful for recovering large transformations. We first show that the alignment error has a nonmonotonic variation with the filter size, due to the opposing effects of filtering on both manifold nonlinearity and image noise. We then study the convergence of the multiscale tangent distance method to the optimal solution. We finally examine the performance of the tangent distance method in image classification applications. Our theoretical findings are confirmed by experiments on image transformation models involving translations, rotations and scalings. Our study is the first detailed study of the tangent distance algorithm that leads to a better understanding of its efficacy and to the proper selection of its design parameters.
[ { "created": "Sat, 11 Jan 2014 13:31:14 GMT", "version": "v1" }, { "created": "Tue, 24 Jun 2014 16:10:06 GMT", "version": "v2" }, { "created": "Tue, 30 Sep 2014 17:05:41 GMT", "version": "v3" } ]
2014-10-01
[ [ "Vural", "Elif", "" ], [ "Frossard", "Pascal", "" ] ]
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1401.2530
Tongjiang Yan
Tongjiang Yan, Zhixiong Chen, Bao Li
A General Construction of Binary Sequences with Optimal Autocorrelation
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cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
A general construction of binary sequences with low autocorrelation are considered in the paper. Based on recent progresses about this topic and this construction, several classes of binary sequences with optimal autocorrelation and other low autocorrelation are presented.
[ { "created": "Sat, 11 Jan 2014 13:53:24 GMT", "version": "v1" } ]
2014-01-14
[ [ "Yan", "Tongjiang", "" ], [ "Chen", "Zhixiong", "" ], [ "Li", "Bao", "" ] ]
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1401.2532
Yash Raj Shrestha
Jiong Guo and Yash Raj Shrestha
Parameterized Complexity of Edge Interdiction Problems
null
null
null
null
cs.CC cs.DS
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We study the parameterized complexity of interdiction problems in graphs. For an optimization problem on graphs, one can formulate an interdiction problem as a game consisting of two players, namely, an interdictor and an evader, who compete on an objective with opposing interests. In edge interdiction problems, every edge of the input graph has an interdiction cost associated with it and the interdictor interdicts the graph by modifying the edges in the graph, and the number of such modifications is constrained by the interdictor's budget. The evader then solves the given optimization problem on the modified graph. The action of the interdictor must impede the evader as much as possible. We focus on edge interdiction problems related to minimum spanning tree, maximum matching and shortest paths. These problems arise in different real world scenarios. We derive several fixed-parameter tractability and W[1]-hardness results for these interdiction problems with respect to various parameters. Next, we show close relation between interdiction problems and partial cover problems on bipartite graphs where the goal is not to cover all elements but to minimize/maximize the number of covered elements with specific number of sets. Hereby, we investigate the parameterized complexity of several partial cover problems on bipartite graphs.
[ { "created": "Sat, 11 Jan 2014 14:24:12 GMT", "version": "v1" } ]
2014-01-14
[ [ "Guo", "Jiong", "" ], [ "Shrestha", "Yash Raj", "" ] ]
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1401.2538
Hsueh-I Lu
Hsueh-I Lu
Linear-Time Compression of Bounded-Genus Graphs into Information-Theoretically Optimal Number of Bits
26 pages, 9 figures, accepted to SIAM Journal on Computing
SIAM Journal on Computing, 43(2):477-496, 2014
10.1137/120879142
null
cs.DS
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
A $\textit{compression scheme}$ $A$ for a class $\mathbb{G}$ of graphs consists of an encoding algorithm $\textit{Encode}_A$ that computes a binary string $\textit{Code}_A(G)$ for any given graph $G$ in $\mathbb{G}$ and a decoding algorithm $\textit{Decode}_A$ that recovers $G$ from $\textit{Code}_A(G)$. A compression scheme $A$ for $\mathbb{G}$ is $\textit{optimal}$ if both $\textit{Encode}_A$ and $\textit{Decode}_A$ run in linear time and the number of bits of $\textit{Code}_A(G)$ for any $n$-node graph $G$ in $\mathbb{G}$ is information-theoretically optimal to within lower-order terms. Trees and plane triangulations were the only known nontrivial graph classes that admit optimal compression schemes. Based upon Goodrich's separator decomposition for planar graphs and Djidjev and Venkatesan's planarizers for bounded-genus graphs, we give an optimal compression scheme for any hereditary (i.e., closed under taking subgraphs) class $\mathbb{G}$ under the premise that any $n$-node graph of $\mathbb{G}$ to be encoded comes with a genus-$o(\frac{n}{\log^2 n})$ embedding. By Mohar's linear-time algorithm that embeds a bounded-genus graph on a genus-$O(1)$ surface, our result implies that any hereditary class of genus-$O(1)$ graphs admits an optimal compression scheme. For instance, our result yields the first-known optimal compression schemes for planar graphs, plane graphs, graphs embedded on genus-$1$ surfaces, graphs with genus $2$ or less, $3$-colorable directed plane graphs, $4$-outerplanar graphs, and forests with degree at most $5$. For non-hereditary graph classes, we also give a methodology for obtaining optimal compression schemes. From this methodology, we give the first known optimal compression schemes for triangulations of genus-$O(1)$ surfaces and floorplans.
[ { "created": "Sat, 11 Jan 2014 15:01:49 GMT", "version": "v1" } ]
2014-04-24
[ [ "Lu", "Hsueh-I", "" ] ]
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1401.2540
Deepali Virmani
Deepali Virmani, Ankita Soni, Nikhil Batra
Reliability Analysis to overcome Black Hole Attack in Wireless Sensor Network
6 pages, 8 figures
null
null
null
cs.NI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Wireless sensor networks are vulnerable to several attacks, one of them being the black hole attack. A black hole is a malicious node that attracts all the traffic in the network by advertising that it has the shortest path in the network. Once it receives the packet from other nodes, it drops all the packets causing loss of critical information. In this paper we propose a reliability analysis mechanism. The proposed reliability analysis scheme overcomes the shortcomings of existing cooperative black hole attack using AODV routing protocol. As soon as there is a path available for routing, its reliability is checked using the proposed scheme. The proposed reliability analysis scheme helps in achieving maximum reliability by minimizing the complexity of the system. The final path available after the reliability analysis using the proposed scheme will make the path secure enough to minimize the packet loss, end-to-end delay and the energy utilization of the network as well as maximize the network lifetime in return.
[ { "created": "Sat, 11 Jan 2014 15:22:16 GMT", "version": "v1" } ]
2014-01-14
[ [ "Virmani", "Deepali", "" ], [ "Soni", "Ankita", "" ], [ "Batra", "Nikhil", "" ] ]
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1401.2541
Deepali Virmani
Dr. Deepali Virmani, Manas Hemrajani, Shringarica Chandel
Exponential Trust Based Mechanism to Detect Black Hole attack in Wireless Sensor Network
5 pages, 2 figures
null
null
null
cs.NI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Security is a key feature in Wireless Sensor Networks but they are prone to many kinds of attacks and one of them is Black Hole Attack. In a black hole attack all the packets are consecutively dropped which leads to the decrease in the efficiency of the network and unnecessary wastage of battery life. In this paper, we propose an exponential trust based mechanism to detect the malicious node. In the proposed method a Streak counter is deployed to store the consecutive number of packets dropped and a trust factor is maintained for each node. The trust factor drops exponentially with each consecutive packet dropped which helps in detecting the malicious node. The proposed method show a drastic decrease in the number of packets dropped before the node being detected as a malicious node.
[ { "created": "Sat, 11 Jan 2014 15:29:25 GMT", "version": "v1" } ]
2014-01-14
[ [ "Virmani", "Dr. Deepali", "" ], [ "Hemrajani", "Manas", "" ], [ "Chandel", "Shringarica", "" ] ]
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1401.2542
Jamil Hamodi Mr.
Jamil Hamodi, Ravindra Thool, Khaled Salah, Anwar Alsagaf, and Yousef Holba
Performance Study of Mobile TV over Mobile WiMAX Considering Different Modulation and Coding Techniques
12 pages, 9 figures. arXiv admin note: substantial text overlap with arXiv:1312.7442; and text overlap with arXiv:1005.0976 by other authors
Int. J. Communications,Network and System Sciences, 2014, 7, 10-21
null
null
cs.NI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
With the advent of the wide-spread use of smart phones, video streaming over mobile wireless networks has suddenly taken a huge surge in recent years. Considering its enormous potential, mobile WiMAX is emerging as a viable technology for mobile TV which is expected to become of key importance in the future of mobile indus- try. In this paper, a simulation performance study of Mobile TV over mobile WiMAX is conducted with different types of adaptive modulation and coding taking into account key system and environment parameters which include the variation in the speed of the mobile, path-loss, scheduling service classes with the fixed type of mod- ulations. Our simulation has been conducted using OPNET simulation. Simulation results show that dynamic adaptation of modulation and coding schemes based onchannel conditions can offer considerably more en- hanced QoS and at the same time reduce the overall bandwidthof the system.
[ { "created": "Sat, 11 Jan 2014 15:40:31 GMT", "version": "v1" } ]
2014-01-14
[ [ "Hamodi", "Jamil", "" ], [ "Thool", "Ravindra", "" ], [ "Salah", "Khaled", "" ], [ "Alsagaf", "Anwar", "" ], [ "Holba", "Yousef", "" ] ]
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1401.2543
Alexei D. Kiselev
E.P. Pozhidaev, A. K. Srivastava, Alexei D. Kiselev, V.G. Chigrinov, V.V. Vashchenko, A.I. Krivoshey, M.V. Minchenko, H.-S. Kwok
Enhanced Kerr effect in vertically aligned deformed helix ferroelectric liquid crystals
revtex4-1, 4 pages, 5 figures
null
10.1364/OL.39.002900
null
cond-mat.mtrl-sci physics.optics
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We disclose the vertically aligned deformed helix ferroelectric liquid crystal (VADHFLC) whose Kerr constant ($K_{\mathrm{kerr}}\approx 130$~nm/V$^2$ at $\lambda=543$~nm) is one order of magnitude higher than any other value previously reported for liquid crystalline structures. Under certain conditions, the phase modulation with ellipticity less than 0.05 over the range of continuous and hysteresis free electric adjustment of the phase shift from zero to 2$\pi$ have been obtained at sub-kilohertz frequency.
[ { "created": "Sat, 11 Jan 2014 16:02:34 GMT", "version": "v1" } ]
2015-06-18
[ [ "Pozhidaev", "E. P.", "" ], [ "Srivastava", "A. K.", "" ], [ "Kiselev", "Alexei D.", "" ], [ "Chigrinov", "V. G.", "" ], [ "Vashchenko", "V. V.", "" ], [ "Krivoshey", "A. I.", "" ], [ "Minchenko", "M. V.", "" ], [ "Kwok", "H. -S.", "" ] ]
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1401.2545
Sanjay Singh
Vikram Santhalia and Sanjay Singh
Design and Development of a User Specific Dynamic E-Magazine
19 pages, 6 figures
null
null
MUITTR-2014-0001
cs.IR
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Internet and electronic media gaining more popularity due to ease and speed, the count of Internet users has increased tremendously. The world is moving faster each day with several events taking place at once and the Internet is flooded with information in every field. There are categories of information ranging from most relevant to user, to the information totally irrelevant or less relevant to specific users. In such a scenario getting the information which is most relevant to the user is indispensable to save time. The motivation of our solution is based on the idea of optimizing the search for information automatically. This information is delivered to user in the form of an interactive GUI. The optimization of the contents or information served to him is based on his social networking profiles and on his reading habits on the proposed solution. The aim is to get the user's profile information based on his social networking profile considering that almost every Internet user has one. This helps us personalize the contents delivered to the user in order to produce what is most relevant to him, in the form of a personalized e-magazine. Further the proposed solution learns user's reading habits for example the news he saves or clicks the most and makes a decision to provide him with the best contents.
[ { "created": "Sat, 11 Jan 2014 16:28:23 GMT", "version": "v1" } ]
2014-01-14
[ [ "Santhalia", "Vikram", "" ], [ "Singh", "Sanjay", "" ] ]
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1401.2548
Pawe{\l} Fiedor
Pawe{\l} Fiedor
Mutual Information Rate-Based Networks in Financial Markets
12 pages, 12 figures, 2 tables, submitted to PRE
Phys. Rev. E 89, 2014, 052801
10.1103/PhysRevE.89.052801
null
q-fin.ST cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In the last years efforts in econophysics have been shifted to study how network theory can facilitate understanding of complex financial markets. Main part of these efforts is the study of correlation-based hierarchical networks. This is somewhat surprising as the underlying assumptions of research looking at financial markets is that they behave chaotically. In fact it's common for econophysicists to estimate maximal Lyapunov exponent for log returns of a given financial asset to confirm that prices behave chaotically. Chaotic behaviour is only displayed by dynamical systems which are either non-linear or infinite-dimensional. Therefore it seems that non-linearity is an important part of financial markets, which is proved by numerous studies confirming financial markets display significant non-linear behaviour, yet network theory is used to study them using almost exclusively correlations and partial correlations, which are inherently dealing with linear dependencies only. In this paper we introduce a way to incorporate non-linear dynamics and dependencies into hierarchical networks to study financial markets using mutual information and its dynamical extension: the mutual information rate. We estimate it using multidimensional Lempel-Ziv complexity and then convert it into an Euclidean metric in order to find appropriate topological structure of networks modelling financial markets. We show that this approach leads to different results than correlation-based approach used in most studies, on the basis of 15 biggest companies listed on Warsaw Stock Exchange in the period of 2009-2012 and 91 companies listed on NYSE100 between 2003 and 2013, using minimal spanning trees and planar maximally filtered graphs.
[ { "created": "Sat, 11 Jan 2014 16:56:38 GMT", "version": "v1" } ]
2014-06-18
[ [ "Fiedor", "Paweł", "" ] ]
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1401.2551
Alejandro Vladimiro Silhanek
A. Guidobaldi, Y. Jeyaram, I. Berdakin, V. V. Moshchalkov, C. A. Condat, V. I. Marconi, L. Giojalas, A. V. Silhanek
Geometrical guidance and trapping transition of human sperm cells
null
null
10.1103/PhysRevE.89.032720
null
cond-mat.soft physics.bio-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The guidance of human sperm cells under confinement in quasi 2D microchambers is investigated using a purely physical method to control their distribution. Transport property measurements and simulations are performed with dilute sperm populations, for which effects of geometrical guidance and concentration are studied in detail. In particular, a trapping transition at convex angular wall features is identified and analyzed. We also show that highly efficient microratchets can be fabricated by using curved asymmetric obstacles to take advantage of the spermatozoa specific swimming strategy.
[ { "created": "Sat, 11 Jan 2014 17:49:36 GMT", "version": "v1" } ]
2015-06-18
[ [ "Guidobaldi", "A.", "" ], [ "Jeyaram", "Y.", "" ], [ "Berdakin", "I.", "" ], [ "Moshchalkov", "V. V.", "" ], [ "Condat", "C. A.", "" ], [ "Marconi", "V. I.", "" ], [ "Giojalas", "L.", "" ], [ "Silhanek", "A. V.", "" ] ]
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1401.2553
Mikhail Berlinkov
Mikhail V. Berlinkov
Testing for Synchronization
minor corrections. arXiv admin note: substantial text overlap with arXiv:1312.2226
null
null
null
cs.FL
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We consider the first problem that appears in any application of synchronizing automata, namely, the problem of deciding whether or not a given $n$-state $k$-letter automaton is synchronizing. First we generalize results from \cite{RandSynch},\cite{On2Problems} for the case of strongly connected partial automata. Specifically, for $k>1$ we show that an automaton is synchronizing with probability $1-O(\frac{1}{n^{0.5k}})$ and present an algorithm with linear in $n$ expected time, while the best known algorithm is quadratic on each instance. This results are interesting due to their applications in synchronization of finite state information sources. After that we consider the synchronization of reachable partial automata that has application for splicing systems in computational biology. For this case we prove that the problem of testing a given automaton for synchronization is NP-complete.
[ { "created": "Sat, 11 Jan 2014 18:04:38 GMT", "version": "v1" }, { "created": "Sat, 8 Mar 2014 16:59:54 GMT", "version": "v2" }, { "created": "Mon, 24 Mar 2014 16:04:55 GMT", "version": "v3" }, { "created": "Fri, 2 May 2014 10:22:36 GMT", "version": "v4" } ]
2019-03-20
[ [ "Berlinkov", "Mikhail V.", "" ] ]
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1401.2559
Paul Bierdz
Paul Bierdz, Hui Deng
A Compact Orbital Angular Momentum Spectrometer Using Quantum Zeno Interrogation
8 pages, 6 figures
Opt. Express 19, 11615-11622 (2011)
10.1364/OE.19.011615
null
physics.optics
http://creativecommons.org/licenses/by/3.0/
We present a scheme to measure the orbital angular momentum spectrum of light using a precisely timed optical loop and quantum non-demolition measurements. We also discuss the influence of imperfect optical components.
[ { "created": "Sat, 11 Jan 2014 19:46:03 GMT", "version": "v1" } ]
2014-01-14
[ [ "Bierdz", "Paul", "" ], [ "Deng", "Hui", "" ] ]
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1401.2560
Sundeep Rangan
Sundeep Rangan, Theodore S. Rappaport and Elza Erkip
Millimeter Wave Cellular Wireless Networks: Potentials and Challenges
17 pages, 15 figures. arXiv admin note: text overlap with arXiv:1312.4921
Proceedings of the IEEE , vol.102, no.3, pp.366,385, March 2014
10.1109/JPROC.2014.2299397
null
cs.NI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Millimeter wave (mmW) frequencies between 30 and 300 GHz are a new frontier for cellular communication that offers the promise of orders of magnitude greater bandwidths combined with further gains via beamforming and spatial multiplexing from multi-element antenna arrays. This paper surveys measurements and capacity studies to assess this technology with a focus on small cell deployments in urban environments. The conclusions are extremely encouraging; measurements in New York City at 28 and 73 GHz demonstrate that, even in an urban canyon environment, significant non-line-of-sight (NLOS) outdoor, street-level coverage is possible up to approximately 200 m from a potential low power micro- or picocell base station. In addition, based on statistical channel models from these measurements, it is shown that mmW systems can offer more than an order of magnitude increase in capacity over current state-of-the-art 4G cellular networks at current cell densities. Cellular systems, however, will need to be significantly redesigned to fully achieve these gains. Specifically, the requirement of highly directional and adaptive transmissions, directional isolation between links and significant possibilities of outage have strong implications on multiple access, channel structure, synchronization and receiver design. To address these challenges, the paper discusses how various technologies including adaptive beamforming, multihop relaying, heterogeneous network architectures and carrier aggregation can be leveraged in the mmW context.
[ { "created": "Sat, 11 Jan 2014 20:16:02 GMT", "version": "v1" } ]
2014-04-29
[ [ "Rangan", "Sundeep", "" ], [ "Rappaport", "Theodore S.", "" ], [ "Erkip", "Elza", "" ] ]
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1401.2566
Pasha Zusmanovich
Hayk Melikyan and Pasha Zusmanovich
Melikyan algebra is a deformation of a Poisson algebra
v3: minor corrections in references; added ancillary files
Journal of Physics: Conference Series 532 (2014), 012019
10.1088/1742-6596/532/1/012019
null
math.RA cs.SC
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We prove, using computer, that the restricted Melikyan algebra of dimension 125 is a deformation of a Poisson algebra.
[ { "created": "Sat, 11 Jan 2014 20:29:02 GMT", "version": "v1" }, { "created": "Wed, 13 Aug 2014 11:49:27 GMT", "version": "v2" }, { "created": "Sat, 20 Aug 2016 18:51:58 GMT", "version": "v3" } ]
2016-08-23
[ [ "Melikyan", "Hayk", "" ], [ "Zusmanovich", "Pasha", "" ] ]
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1401.2567
Danko Ilik
Danko Ilik
Axioms and Decidability for Type Isomorphism in the Presence of Sums
null
null
10.1145/2603088.2603115
null
cs.LO cs.PL math.LO
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We consider the problem of characterizing isomorphisms of types, or, equivalently, constructive cardinality of sets, in the simultaneous presence of disjoint unions, Cartesian products, and exponentials. Mostly relying on results about polynomials with exponentiation that have not been used in our context, we derive: that the usual finite axiomatization known as High-School Identities (HSI) is complete for a significant subclass of types; that it is decidable for that subclass when two types are isomorphic; that, for the whole of the set of types, a recursive extension of the axioms of HSI exists that is complete; and that, for the whole of the set of types, the question as to whether two types are isomorphic is decidable when base types are to be interpreted as finite sets. We also point out certain related open problems.
[ { "created": "Sat, 11 Jan 2014 20:56:42 GMT", "version": "v1" }, { "created": "Mon, 20 Jan 2014 07:36:43 GMT", "version": "v2" } ]
2014-11-04
[ [ "Ilik", "Danko", "" ] ]
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1401.2568
P{\aa}l Anders Floor Dr
P{\aa}l Anders Floor, Anna N. Kim, Tor A. Ramstad, Ilangko Balasingham, Niklas Wernersson, Mikael Skoglund
Zero-Delay Joint Source-Channel Coding for a Multivariate Gaussian on a Gaussian MAC
11 page draft
null
null
null
cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this paper, communication of a Multivariate Gaussian over a Gaussian Multiple Access Channel is studied. Distributed zero-delay joint source-channel coding (JSCC) solutions to the problem are given. Both nonlinear and linear approaches are discussed. The performance upper bound (signal-to-distortion ratio) for arbitrary code length is also derived and Zero-delay cooperative JSCC is briefly addressed in order to provide an approximate bound on the performance of zero-delay schemes. The main contribution is a nonlinear hybrid discrete-analog JSSC scheme based on distributed quantization and a linear continuous mapping named Distributed Quantizer Linear Coder (DQLC). The DQLC has promising performance which improves with increasing correlation, and is robust against variations in noise level. The DQLC exhibits a constant gap to the performance upper bound as the signal-to-noise ratio (SNR) becomes large for any number of sources and values of correlation. Therefore it outperforms a linear solution (uncoded transmission) in any case when the SNR gets sufficiently large.
[ { "created": "Sat, 11 Jan 2014 20:58:11 GMT", "version": "v1" } ]
2014-01-14
[ [ "Floor", "Pål Anders", "" ], [ "Kim", "Anna N.", "" ], [ "Ramstad", "Tor A.", "" ], [ "Balasingham", "Ilangko", "" ], [ "Wernersson", "Niklas", "" ], [ "Skoglund", "Mikael", "" ] ]
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1401.2569
Saeid Haghighatshoar
Saeid Haghighatshoar
Multi Terminal Probabilistic Compressed Sensing
11 pages, 13 figures. arXiv admin note: text overlap with arXiv:1112.0708 by other authors
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null
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cs.IT math.IT stat.ML
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this paper, the `Approximate Message Passing' (AMP) algorithm, initially developed for compressed sensing of signals under i.i.d. Gaussian measurement matrices, has been extended to a multi-terminal setting (MAMP algorithm). It has been shown that similar to its single terminal counterpart, the behavior of MAMP algorithm is fully characterized by a `State Evolution' (SE) equation for large block-lengths. This equation has been used to obtain the rate-distortion curve of a multi-terminal memoryless source. It is observed that by spatially coupling the measurement matrices, the rate-distortion curve of MAMP algorithm undergoes a phase transition, where the measurement rate region corresponding to a low distortion (approximately zero distortion) regime is fully characterized by the joint and conditional Renyi information dimension (RID) of the multi-terminal source. This measurement rate region is very similar to the rate region of the Slepian-Wolf distributed source coding problem where the RID plays a role similar to the discrete entropy. Simulations have been done to investigate the empirical behavior of MAMP algorithm. It is observed that simulation results match very well with predictions of SE equation for reasonably large block-lengths.
[ { "created": "Sat, 11 Jan 2014 21:20:09 GMT", "version": "v1" } ]
2014-01-14
[ [ "Haghighatshoar", "Saeid", "" ] ]
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1401.2571
Mahmood A. Rashid
Mahmood A. Rashid, Md Tamjidul Hoque and Abdul Sattar
Association Rules Mining Based Clinical Observations
5 pages, MEDINFO 2010, C. Safran et al. (Eds.), IOS Press
null
null
null
cs.DB cs.CE
http://creativecommons.org/licenses/by/3.0/
Healthcare institutes enrich the repository of patients' disease related information in an increasing manner which could have been more useful by carrying out relational analysis. Data mining algorithms are proven to be quite useful in exploring useful correlations from larger data repositories. In this paper we have implemented Association Rules mining based a novel idea for finding co-occurrences of diseases carried by a patient using the healthcare repository. We have developed a system-prototype for Clinical State Correlation Prediction (CSCP) which extracts data from patients' healthcare database, transforms the OLTP data into a Data Warehouse by generating association rules. The CSCP system helps reveal relations among the diseases. The CSCP system predicts the correlation(s) among primary disease (the disease for which the patient visits the doctor) and secondary disease/s (which is/are other associated disease/s carried by the same patient having the primary disease).
[ { "created": "Sat, 11 Jan 2014 21:56:45 GMT", "version": "v1" } ]
2014-01-14
[ [ "Rashid", "Mahmood A.", "" ], [ "Hoque", "Md Tamjidul", "" ], [ "Sattar", "Abdul", "" ] ]
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1401.2580
Alexander Rabinovich
Alexander Rabinovich (Tel Aviv University)
A Proof of Kamp's theorem
null
Logical Methods in Computer Science, Volume 10, Issue 1 (February 18, 2014) lmcs:730
10.2168/LMCS-10(1:14)2014
null
cs.LO math.LO
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We provide a simple proof of Kamp's theorem.
[ { "created": "Sun, 12 Jan 2014 00:05:22 GMT", "version": "v1" }, { "created": "Wed, 15 Jan 2014 16:10:02 GMT", "version": "v2" }, { "created": "Sat, 15 Feb 2014 23:11:31 GMT", "version": "v3" } ]
2015-07-01
[ [ "Rabinovich", "Alexander", "", "Tel Aviv University" ] ]
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1401.2591
Weihua Deng Professor
Shuqin Wang, Weihua Deng, Yujiang Wu, Jinyun Yuan
Characteristic local discontinuous Galerkin methods for solving time-dependent convection-dominated Navier-Stokes equations
22 pages, 13 figures
Commun. Comput. Phys. Vol. 22, No. 1, pp. 202-227, 2017
10.4208/cicp.220515.031016a
null
physics.comp-ph math.NA
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Combining the characteristic method and the local discontinuous Galerkin method with carefully constructing numerical fluxes, we design the variational formulations for the time-dependent convection-dominated Navier-Stokes equations in $\mathbb{R}^2$. The proposed symmetric variational formulation is strictly proved to be unconditionally stable; and the scheme has the striking benefit that the conditional number of the matrix of the corresponding matrix equation does not increase with the refining of the meshes. The presented scheme works well for a wide range of Reynolds numbers, e.g., the scheme still has good error convergence when $Re=0.5 e+005$ or $1.0 e+ 008$. Extensive numerical experiments are performed to show the optimal convergence orders and the contours of the solutions of the equation with given initial and boundary conditions.
[ { "created": "Sun, 12 Jan 2014 05:40:16 GMT", "version": "v1" } ]
2017-04-03
[ [ "Wang", "Shuqin", "" ], [ "Deng", "Weihua", "" ], [ "Wu", "Yujiang", "" ], [ "Yuan", "Jinyun", "" ] ]
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1401.2592
Chunhua Geng
Chunhua Geng, Hua Sun, Syed A. Jafar
On the Optimality of Treating Interference as Noise: General Message Sets
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null
null
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cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In a K-user Gaussian interference channel, it has been shown that if for each user the desired signal strength is no less than the sum of the strengths of the strongest interference from this user and the strongest interference to this user (all values in dB scale), then treating interference as noise (TIN) is optimal from the perspective of generalized degrees-of-freedom (GDoF) and achieves the entire channel capacity region to within a constant gap. In this work, we show that for such TIN-optimal interference channels, even if the message set is expanded to include an independent message from each transmitter to each receiver, operating the new channel as the original interference channel and treating interference as noise is still optimal for the sum capacity up to a constant gap. Furthermore, we extend the result to the sum-GDoF optimality of TIN in the general setting of X channels with arbitrary numbers of transmitters and receivers.
[ { "created": "Sun, 12 Jan 2014 06:05:49 GMT", "version": "v1" } ]
2014-01-14
[ [ "Geng", "Chunhua", "" ], [ "Sun", "Hua", "" ], [ "Jafar", "Syed A.", "" ] ]
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1401.2594
Jun Zhang
You-Qi Nie, Hong-Fei Zhang, Zhen Zhang, Jian Wang, Xiongfeng Ma, Jun Zhang, and Jian-Wei Pan
Practical and fast quantum random number generation based on photon arrival time relative to external reference
9 pages, 3 figures, 1 table. Accepted for publication in Applied Physics Letters
Appl. Phys. Lett. 104, 051110 (2014)
10.1063/1.4863224
null
quant-ph cs.CR
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present a practical high-speed quantum random number generator, where the timing of single-photon detection relative to an external time reference is measured as the raw data. The bias of the raw data can be substantially reduced compared with the previous realizations. The raw random bit rate of our generator can reach 109 Mbps. We develop a model for the generator and evaluate the min-entropy of the raw data. Toeplitz matrix hashing is applied for randomness extraction, after which the final random bits are able to pass the standard randomness tests.
[ { "created": "Sun, 12 Jan 2014 06:21:15 GMT", "version": "v1" } ]
2014-02-06
[ [ "Nie", "You-Qi", "" ], [ "Zhang", "Hong-Fei", "" ], [ "Zhang", "Zhen", "" ], [ "Wang", "Jian", "" ], [ "Ma", "Xiongfeng", "" ], [ "Zhang", "Jun", "" ], [ "Pan", "Jian-Wei", "" ] ]
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1401.2596
Zhenqi Huang
Zhenqi Huang, Sayan Mitra, Nitin Vaidya
Differentially Private Distributed Optimization
null
null
null
null
cs.CR cs.DC
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In distributed optimization and iterative consensus literature, a standard problem is for $N$ agents to minimize a function $f$ over a subset of Euclidean space, where the cost function is expressed as a sum $\sum f_i$. In this paper, we study the private distributed optimization (PDOP) problem with the additional requirement that the cost function of the individual agents should remain differentially private. The adversary attempts to infer information about the private cost functions from the messages that the agents exchange. Achieving differential privacy requires that any change of an individual's cost function only results in unsubstantial changes in the statistics of the messages. We propose a class of iterative algorithms for solving PDOP, which achieves differential privacy and convergence to the optimal value. Our analysis reveals the dependence of the achieved accuracy and the privacy levels on the the parameters of the algorithm. We observe that to achieve $\epsilon$-differential privacy the accuracy of the algorithm has the order of $O(\frac{1}{\epsilon^2})$.
[ { "created": "Sun, 12 Jan 2014 07:43:39 GMT", "version": "v1" } ]
2014-01-14
[ [ "Huang", "Zhenqi", "" ], [ "Mitra", "Sayan", "" ], [ "Vaidya", "Nitin", "" ] ]
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1401.2598
Roland Bouffanais
Mohammad Komareji, Roland Bouffanais
Resilience and Controllability of Dynamic Collective Behaviors
null
PLoS ONE 8(12): e82578
10.1371/journal.pone.0082578
null
physics.soc-ph nlin.AO physics.bio-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The network paradigm is used to gain insight into the structural root causes of the resilience of consensus in dynamic collective behaviors, and to analyze the controllability of the swarm dynamics. Here we devise the dynamic signaling network which is the information transfer channel underpinning the swarm dynamics of the directed interagent connectivity based on a topological neighborhood of interactions. The study of the connectedness of the swarm signaling network reveals the profound relationship between group size and number of interacting neighbors, which is found to be in good agreement with field observations on flock of starlings [Ballerini et al. (2008) Proc. Natl. Acad. Sci. USA, 105: 1232]. Using a dynamical model, we generate dynamic collective behaviors enabling us to uncover that the swarm signaling network is a homogeneous clustered small-world network, thus facilitating emergent outcomes if connectedness is maintained. Resilience of the emergent consensus is tested by introducing exogenous environmental noise, which ultimately stresses how deeply intertwined are the swarm dynamics in the physical and network spaces. The availability of the signaling network allows us to analytically establish for the first time the number of driver agents necessary to fully control the swarm dynamics.
[ { "created": "Sun, 12 Jan 2014 07:47:37 GMT", "version": "v1" } ]
2014-01-14
[ [ "Komareji", "Mohammad", "" ], [ "Bouffanais", "Roland", "" ] ]
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1401.2604
Zheng-Zhe Lin
Zheng-Zhe Lin
Theoretical investigation on isomer formation probability and free energy of small C clusters
null
Chin. Phys. B 24, 068201 (2015)
10.1088/1674-1056/24/6/068201
null
physics.atm-clus
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Molecular dynamics simulations and free energy calculations were employed to investigate the evolution, formation probability, detailed balance and isomerization rate of small C cluster isomers at 2500 K. For C10, the isomer formation probability predicted by free energy is in good agreement with molecular dynamics simulation. However, for C20, C30 and C36, the formation probability predicted by free energy is not in agreement with molecular dynamics and the detailed balance does not hold, indicating that the molecule system is in non-equilibrium. Such result may be attributed to the transformation barriers between cage, bowl and sheet isomers.
[ { "created": "Sun, 12 Jan 2014 10:34:26 GMT", "version": "v1" } ]
2015-07-24
[ [ "Lin", "Zheng-Zhe", "" ] ]
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1401.2607
Anyu Wang
Anyu Wang, Zhifang Zhang
Repair Locality From a Combinatorial Perspective
null
null
10.1109/ISIT.2014.6875178
null
cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Repair locality is a desirable property for erasure codes in distributed storage systems. Recently, different structures of local repair groups have been proposed in the definitions of repair locality. In this paper, the concept of regenerating set is introduced to characterize the local repair groups. A definition of locality $r^{(\delta -1)}$ (i.e., locality $r$ with repair tolerance $\delta -1$) under the most general structure of regenerating sets is given. All previously studied locality turns out to be special cases of this definition. Furthermore, three representative concepts of locality proposed before are reinvestigated under the framework of regenerating sets, and their respective upper bounds on the minimum distance are reproved in a uniform and brief form. Additionally, a more precise distance bound is derived for the square code which is a class of linear codes with locality $r^{(2)}$ and high information rate, and an explicit code construction attaining the optimal distance bound is obtained.
[ { "created": "Sun, 12 Jan 2014 11:29:18 GMT", "version": "v1" } ]
2014-10-20
[ [ "Wang", "Anyu", "" ], [ "Zhang", "Zhifang", "" ] ]
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1401.2610
Andrea Ballatore
Andrea Ballatore, David C. Wilson, Michela Bertolotto
A Survey of Volunteered Open Geo-Knowledge Bases in the Semantic Web
null
in Quality Issues in the Management of Web Information, ISRL 50, pp. 93-120, Springer, 2013
10.1007/978-3-642-37688-7_5
null
cs.DL cs.CY cs.IR
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Over the past decade, rapid advances in web technologies, coupled with innovative models of spatial data collection and consumption, have generated a robust growth in geo-referenced information, resulting in spatial information overload. Increasing 'geographic intelligence' in traditional text-based information retrieval has become a prominent approach to respond to this issue and to fulfill users' spatial information needs. Numerous efforts in the Semantic Geospatial Web, Volunteered Geographic Information (VGI), and the Linking Open Data initiative have converged in a constellation of open knowledge bases, freely available online. In this article, we survey these open knowledge bases, focusing on their geospatial dimension. Particular attention is devoted to the crucial issue of the quality of geo-knowledge bases, as well as of crowdsourced data. A new knowledge base, the OpenStreetMap Semantic Network, is outlined as our contribution to this area. Research directions in information integration and Geographic Information Retrieval (GIR) are then reviewed, with a critical discussion of their current limitations and future prospects.
[ { "created": "Sun, 12 Jan 2014 12:04:48 GMT", "version": "v1" } ]
2014-01-14
[ [ "Ballatore", "Andrea", "" ], [ "Wilson", "David C.", "" ], [ "Bertolotto", "Michela", "" ] ]
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1401.2612
Moshe Schwartz
Ohad Elishco and Tom Meyerovitch and Moshe Schwartz
Semi-constrained Systems
null
null
null
null
cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
When transmitting information over a noisy channel, two approaches, dating back to Shannon's work, are common: assuming the channel errors are independent of the transmitted content and devising an error-correcting code, or assuming the errors are data dependent and devising a constrained-coding scheme that eliminates all offending data patterns. In this paper we analyze a middle road, which we call a semiconstrained system. In such a system, which is an extension of the channel with cost constraints model, we do not eliminate the error-causing sequences entirely, but rather restrict the frequency in which they appear. We address several key issues in this study. The first is proving closed-form bounds on the capacity which allow us to bound the asymptotics of the capacity. In particular, we bound the rate at which the capacity of the semiconstrained $(0,k)$-RLL tends to $1$ as $k$ grows. The second key issue is devising efficient encoding and decoding procedures that asymptotically achieve capacity with vanishing error. Finally, we consider delicate issues involving the continuity of the capacity and a relaxation of the definition of semiconstrained systems.
[ { "created": "Sun, 12 Jan 2014 12:08:31 GMT", "version": "v1" }, { "created": "Wed, 21 Jan 2015 19:36:49 GMT", "version": "v2" } ]
2015-01-22
[ [ "Elishco", "Ohad", "" ], [ "Meyerovitch", "Tom", "" ], [ "Schwartz", "Moshe", "" ] ]
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1401.2617
Robert V. Mayer
Robert V. Mayer
Computer model of teaching with the varied coefficient of forgetting
4 pages, 5 figures, 3 programs (on russian). http://injoit.org/index.php/j1
International Journal of Open Information Technologies Vol 2, No 1, 2014
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null
cs.CY
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
At computer modeling of process of training it is usually supposed that all elements of a training material are forgotten with an identical speed. But in practice that knowledge which are included in educational activity of the pupil are remembered much more strongly and forgotten more slowly then knowledge which he doesn't use. For the purpose of more exact research of didactic systems is offered the model of training, in which consider that in case increasing the number of applications of this element of a learning material: 1) duration of its use by the pupil decreases; 2) the coefficient of forgetting decreases. The computer model is considered, programs in the Pascal language are submitted, results of modeling are given and analyzed. Keywords: didactics, information and cybernetic approach, computer modeling of process of training.
[ { "created": "Sun, 12 Jan 2014 12:25:41 GMT", "version": "v1" } ]
2014-01-14
[ [ "Mayer", "Robert V.", "" ] ]
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1401.2618
Deepali Virmani
Deepali Virmani, Vikrant Malhotra, Ridhi Tyagi
Sentiment Analysis Using Collaborated Opinion Mining
5 pages, 6 figures
null
null
null
cs.IR cs.CL
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Opinion mining and Sentiment analysis have emerged as a field of study since the widespread of World Wide Web and internet. Opinion refers to extraction of those lines or phrase in the raw and huge data which express an opinion. Sentiment analysis on the other hand identifies the polarity of the opinion being extracted. In this paper we propose the sentiment analysis in collaboration with opinion extraction, summarization, and tracking the records of the students. The paper modifies the existing algorithm in order to obtain the collaborated opinion about the students. The resultant opinion is represented as very high, high, moderate, low and very low. The paper is based on a case study where teachers give their remarks about the students and by applying the proposed sentiment analysis algorithm the opinion is extracted and represented.
[ { "created": "Sun, 12 Jan 2014 12:35:57 GMT", "version": "v1" } ]
2014-01-14
[ [ "Virmani", "Deepali", "" ], [ "Malhotra", "Vikrant", "" ], [ "Tyagi", "Ridhi", "" ] ]
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1401.2619
Noah Friedkin
Noah E. Friedkin
Scale-free interpersonal influences on opinions in complex systems
null
null
null
null
cs.SI cs.MA physics.soc-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
An important side effect of the evolution of the human brain is an increased capacity to form opinions in a very large domain of issues, which become points of aggressive interpersonal disputes. Remarkably, such disputes are often no less vigorous on small differences of opinion than large differences. Opinion differences that may be measured on the real number line may not directly correspond to the subjective importance of an issue and extent of resistance to opinion change. This is a hard problem for field of opinion dynamics, a field that has become increasingly prominent as it has attracted more contributions to it from investigators in the natural and engineering sciences. The paper contributes a scale-free approach to assessing the extents to which individuals, with unknown heterogeneous resistances to influence, have been influenced by the opinions of others.
[ { "created": "Sun, 12 Jan 2014 12:49:47 GMT", "version": "v1" } ]
2014-01-14
[ [ "Friedkin", "Noah E.", "" ] ]
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1401.2624
Boris Desiatov
Ilya Goykhman, Boris Desiatov, Joseph Shappir, Jacob B. Khurgin, Uriel Levy
Model for quantum efficiency of guided mode plasmonic enhanced silicon Schottky detectors
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null
null
null
physics.optics cond-mat.mes-hall
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Plasmonic enhanced Schottky detectors operating on the basis of the internal photoemission process are becoming an attractive choice for detecting photons with sub bandgap energy. Yet, the quantum efficiency of these detectors appears to be low compare to the more conventional detectors which are based on interband transitions in a semiconductor. Hereby we provide a theoretical model to predict the quantum efficiency of guided mode internal photoemission photodetector with focus on the platform of silicon plasmonics. The model is supported by numerical simulations and comparison to experimental results. Finally, we discuss approaches for further enhancement of the quantum efficiency.
[ { "created": "Sun, 12 Jan 2014 13:25:04 GMT", "version": "v1" } ]
2014-01-14
[ [ "Goykhman", "Ilya", "" ], [ "Desiatov", "Boris", "" ], [ "Shappir", "Joseph", "" ], [ "Khurgin", "Jacob B.", "" ], [ "Levy", "Uriel", "" ] ]
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1401.2632
Valeriy Dolmatov
V K Dolmatov, M B Cooper and M E Hunter
Electron elastic scattering off endohedral fullerenes A@C60: The initial insight
12 pages, 5 figures, submitted to J. Phys. B
null
null
null
physics.atom-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The initial insight into electron elastic scattering off endohedral fullerenes A@C60 is gained in the framework of a theoretical approach where the C60 cage is modelled by a rectangular (in the radial coordinate) potential well, as in many other A@C60 studies. The effect of a noticeably weaker electron elastic scattering off A@C60 compared to that off empty C60 or even the isolated atom A itself, as well as a strong sensitivity of e + A@C60 scattering to the spin of the captured atom A are unraveled, for certain kinds of atoms. Obtained results lay out the initial qualitative basis for identifying interesting measurements and/or more rigorous calculations of e + A@C60 elastic scattering to perform.
[ { "created": "Sun, 12 Jan 2014 15:28:59 GMT", "version": "v1" }, { "created": "Wed, 19 Mar 2014 00:57:17 GMT", "version": "v2" } ]
2014-03-20
[ [ "Dolmatov", "V K", "" ], [ "Cooper", "M B", "" ], [ "Hunter", "M E", "" ] ]
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1401.2640
Sumiyoshi Abe
Sumiyoshi Abe (Mie University, Japan) and Norikazu Suzuki (Nihon University, Japan)
Universal clustering structure and C~0.85 scaling in complex earthquake networks
13 pages, 2 figures. The title changed, and the text as well as the abstract modified
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null
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physics.geo-ph cond-mat.stat-mech
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Earthquake network captures the complexity of seismicity in a peculiar manner. Given a seismic data, the procedure of constructing an earthquake network proposed in [S. Abe, N, Suzuki, Europhys. Lett. 65 (2004) 581] contains as a single parameter the size of the cells, into which a geographical region under consideration is divided. Then, the characteristics of the network depend on the cell size, in general. Here, the dependency of the clustering coefficient, C, of network on the cell size is studied. Remarkably, C of the earthquake networks constructed from the seismic data taken from California, Japan and Iran well coincide for each value of the rescaled dimensionless cell size. It is found that the networks in California and Japan are three-dimensional, whereas the one in Iran is rather two-dimensional. In addition, the values of C of all these three networks monotonically converge to C~0.85 as the dimensionless cell size becomes larger than a common value, highlighting a universal aspect of the concept of earthquake network. An implication of the result to understanding the physics of seismicity is discussed.
[ { "created": "Sun, 12 Jan 2014 16:46:09 GMT", "version": "v1" }, { "created": "Tue, 15 Jul 2014 12:22:03 GMT", "version": "v2" } ]
2014-07-16
[ [ "Abe", "Sumiyoshi", "", "Mie University, Japan" ], [ "Suzuki", "Norikazu", "", "Nihon\n University, Japan" ] ]
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1401.2641
Zeeshan Bhatti
Imdad Ali Ismaili, Zeeshan Bhatti, Azhar Ali Shah
Towards a Generic Framework for the Development of Unicode Based Digital Sindhi Dictionaries
null
Mehran University Research Journal of Engineering & Technology Volume 31, No. 1, January 2012 [ISSN 0254-7821]
null
null
cs.CL
http://creativecommons.org/licenses/by-nc-sa/3.0/
Dictionaries are essence of any language providing vital linguistic recourse for the language learners, researchers and scholars. This paper focuses on the methodology and techniques used in developing software architecture for a UBSESD (Unicode Based Sindhi to English and English to Sindhi Dictionary). The proposed system provides an accurate solution for construction and representation of Unicode based Sindhi characters in a dictionary implementing Hash Structure algorithm and a custom java Object as its internal data structure saved in a file. The System provides facilities for Insertion, Deletion and Editing of new records of Sindhi. Through this framework any type of Sindhi to English and English to Sindhi Dictionary (belonging to different domains of knowledge, e.g. engineering, medicine, computer, biology etc.) could be developed easily with accurate representation of Unicode Characters in font independent manner.
[ { "created": "Sun, 12 Jan 2014 16:49:53 GMT", "version": "v1" } ]
2014-01-14
[ [ "Ismaili", "Imdad Ali", "" ], [ "Bhatti", "Zeeshan", "" ], [ "Shah", "Azhar Ali", "" ] ]
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1401.2651
David White
David White
An Overview of Schema Theory
27 pages. Originally written in 2009 and hosted on my website, I've decided to put it on the arXiv as a more permanent home. The paper is primarily expository, so I don't really know where to submit it, but perhaps one day I will find an appropriate journal
Graduate Journal of Mathematics, Volume 3, Issue 2 (2018), 37-59
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cs.NE
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The purpose of this paper is to give an introduction to the field of Schema Theory written by a mathematician and for mathematicians. In particular, we endeavor to to highlight areas of the field which might be of interest to a mathematician, to point out some related open problems, and to suggest some large-scale projects. Schema theory seeks to give a theoretical justification for the efficacy of the field of genetic algorithms, so readers who have studied genetic algorithms stand to gain the most from this paper. However, nothing beyond basic probability theory is assumed of the reader, and for this reason we write in a fairly informal style. Because the mathematics behind the theorems in schema theory is relatively elementary, we focus more on the motivation and philosophy. Many of these results have been proven elsewhere, so this paper is designed to serve a primarily expository role. We attempt to cast known results in a new light, which makes the suggested future directions natural. This involves devoting a substantial amount of time to the history of the field. We hope that this exposition will entice some mathematicians to do research in this area, that it will serve as a road map for researchers new to the field, and that it will help explain how schema theory developed. Furthermore, we hope that the results collected in this document will serve as a useful reference. Finally, as far as the author knows, the questions raised in the final section are new.
[ { "created": "Sun, 12 Jan 2014 17:52:57 GMT", "version": "v1" } ]
2021-09-01
[ [ "White", "David", "" ] ]
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1401.2657
Vincenzo De Florio
Hong Sun, Vincenzo De Florio, Ning Gui and Chris Blondia
The Missing Ones: Key Ingredients Towards Effective Ambient Assisted Living Systems
null
Journal of Ambient Intelligence and Smart Environments, Volume 2 Issue 2, April 2010 Pages 109-120 IOS Press Amsterdam, The Netherlands, The Netherlands
null
null
cs.CY cs.AI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The population of elderly people keeps increasing rapidly, which becomes a predominant aspect of our societies. As such, solutions both efficacious and cost-effective need to be sought. Ambient Assisted Living (AAL) is a new approach which promises to address the needs from elderly people. In this paper, we claim that human participation is a key ingredient towards effective AAL systems, which not only saves social resources, but also has positive relapses on the psychological health of the elderly people. Challenges in increasing the human participation in ambient assisted living are discussed in this paper and solutions to meet those challenges are also proposed. We use our proposed mutual assistance community, which is built with service oriented approach, as an example to demonstrate how to integrate human tasks in AAL systems. Our preliminary simulation results are presented, which support the effectiveness of human participation.
[ { "created": "Sun, 12 Jan 2014 18:51:43 GMT", "version": "v1" } ]
2014-01-14
[ [ "Sun", "Hong", "" ], [ "De Florio", "Vincenzo", "" ], [ "Gui", "Ning", "" ], [ "Blondia", "Chris", "" ] ]
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1401.2658
Eran Edri
Eran Edri, Saar Kirmayer, Alex Henning, Sabyasachi Mukhopadhyay, Konstantin Gartsman, Yossi Rosenwaks, Gary Hodes, David Cahen
Why Lead Methylammonium tri-IODIDE perovskite-based solar cells requires a mesoporous electron transporting scaffold (but not necessarily a hole conductor)
18 pages, 6 figured, submitted to Nano Letters on December 2nd, 2013
null
10.1021/nl404454h
null
physics.chem-ph cond-mat.mtrl-sci
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
CH3NH3PbI3-based solar cells were characterized with electron beam-induced current (EBIC), and compared to CH3NH3PbI3-xClx ones. A spatial map of charge separation efficiency in working cells shows p-i-n structures for both thin film cells. Effective diffusion lengths, LD, (from EBIC profile) show that holes are extracted significantly more efficiently than electrons in CH3NH3PbI3, explaining why CH3NH3PbI3-based cells require mesoporous electron conductors, while CH3NH3PbI3-xClx ones, where LD values are comparable for both charge types, do not.
[ { "created": "Sun, 12 Jan 2014 19:08:05 GMT", "version": "v1" } ]
2015-06-18
[ [ "Edri", "Eran", "" ], [ "Kirmayer", "Saar", "" ], [ "Henning", "Alex", "" ], [ "Mukhopadhyay", "Sabyasachi", "" ], [ "Gartsman", "Konstantin", "" ], [ "Rosenwaks", "Yossi", "" ], [ "Hodes", "Gary", "" ], [ "Cahen", "David", "" ] ]
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1401.2662
Shiva Kintali
Shiva Kintali
Directed Width Parameters and Circumference of Digraphs
null
null
null
null
math.CO cs.DM cs.DS
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We prove that the directed treewidth, DAG-width and Kelly-width of a digraph are bounded above by its circumference plus one.
[ { "created": "Sun, 12 Jan 2014 19:51:29 GMT", "version": "v1" } ]
2014-01-14
[ [ "Kintali", "Shiva", "" ] ]
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1401.2663
Cem Rifki Aydin M.Sc.
Cem R{\i}fk{\i} Ayd{\i}n, Ali Erkan, Tunga G\"ung\"or, and Hidayet Tak\c{c}{\i}
Dictionary-Based Concept Mining: An Application for Turkish
12 pages with 3 figures, to be published in "International Conference on Foundations of Computer Science & Technology (CST 2014), Zurich, Switzerland - January 2014 Proceedings, AIRCC"
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null
cs.CL
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this study, a dictionary-based method is used to extract expressive concepts from documents. So far, there have been many studies concerning concept mining in English, but this area of study for Turkish, an agglutinative language, is still immature. We used dictionary instead of WordNet, a lexical database grouping words into synsets that is widely used for concept extraction. The dictionaries are rarely used in the domain of concept mining, but taking into account that dictionary entries have synonyms, hypernyms, hyponyms and other relationships in their meaning texts, the success rate has been high for determining concepts. This concept extraction method is implemented on documents, that are collected from different corpora.
[ { "created": "Sun, 12 Jan 2014 19:52:49 GMT", "version": "v1" } ]
2014-01-14
[ [ "Aydın", "Cem Rıfkı", "" ], [ "Erkan", "Ali", "" ], [ "Güngör", "Tunga", "" ], [ "Takçı", "Hidayet", "" ] ]
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1401.2668
Jinbo Xu
Jianzhu Ma, Sheng Wang, Zhiyong Wang and Jinbo Xu
MRFalign: Protein Homology Detection through Alignment of Markov Random Fields
Accepted by both RECOMB 2014 and PLOS Computational Biology
null
10.1371/journal.pcbi.1003500
null
q-bio.QM cs.CE cs.LG
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Sequence-based protein homology detection has been extensively studied and so far the most sensitive method is based upon comparison of protein sequence profiles, which are derived from multiple sequence alignment (MSA) of sequence homologs in a protein family. A sequence profile is usually represented as a position-specific scoring matrix (PSSM) or an HMM (Hidden Markov Model) and accordingly PSSM-PSSM or HMM-HMM comparison is used for homolog detection. This paper presents a new homology detection method MRFalign, consisting of three key components: 1) a Markov Random Fields (MRF) representation of a protein family; 2) a scoring function measuring similarity of two MRFs; and 3) an efficient ADMM (Alternating Direction Method of Multipliers) algorithm aligning two MRFs. Compared to HMM that can only model very short-range residue correlation, MRFs can model long-range residue interaction pattern and thus, encode information for the global 3D structure of a protein family. Consequently, MRF-MRF comparison for remote homology detection shall be much more sensitive than HMM-HMM or PSSM-PSSM comparison. Experiments confirm that MRFalign outperforms several popular HMM or PSSM-based methods in terms of both alignment accuracy and remote homology detection and that MRFalign works particularly well for mainly beta proteins. For example, tested on the benchmark SCOP40 (8353 proteins) for homology detection, PSSM-PSSM and HMM-HMM succeed on 48% and 52% of proteins, respectively, at superfamily level, and on 15% and 27% of proteins, respectively, at fold level. In contrast, MRFalign succeeds on 57.3% and 42.5% of proteins at superfamily and fold level, respectively. This study implies that long-range residue interaction patterns are very helpful for sequence-based homology detection. The software is available for download at http://raptorx.uchicago.edu/download/.
[ { "created": "Sun, 12 Jan 2014 20:41:08 GMT", "version": "v1" }, { "created": "Wed, 15 Jan 2014 01:55:17 GMT", "version": "v2" } ]
2015-06-18
[ [ "Ma", "Jianzhu", "" ], [ "Wang", "Sheng", "" ], [ "Wang", "Zhiyong", "" ], [ "Xu", "Jinbo", "" ] ]
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1401.2672
Arya Mazumdar
Arya Mazumdar
On a Duality Between Recoverable Distributed Storage and Index Coding
A small new section and new references added. A minor error corrected from the previous version
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cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this paper, we introduce a model of a single-failure locally recoverable distributed storage system. This model appears to give rise to a problem seemingly dual of the well-studied index coding problem. The relation between the dimensions of an optimal index code and optimal distributed storage code of our model has been established in this paper. We also show some extensions to vector codes.
[ { "created": "Sun, 12 Jan 2014 21:00:50 GMT", "version": "v1" }, { "created": "Mon, 10 Mar 2014 22:49:15 GMT", "version": "v2" } ]
2014-03-12
[ [ "Mazumdar", "Arya", "" ] ]
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1401.2684
Kiran Sree Pokkuluri Prof
Pokkuluri Kiran Sree, Inampudi Ramesh Babu
Improving Quality of Clustering using Cellular Automata for Information retrieval
Journal of Computer Science 4 (2): 167-171, 2008,ISSN 1549-3636, 2008 Science Publications
Journal of Computer Science 4 (2): 167-171, 2008,ISSN 1549-3636, 2008 Science Publications
null
null
cs.IR
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Clustering has been widely applied to Information Retrieval (IR) on the grounds of its potential improved effectiveness over inverted file search. Clustering is a mostly unsupervised procedure and the majority of the clustering algorithms depend on certain assumptions in order to define the subgroups present in a data set .A clustering quality measure is a function that, given a data set and its partition into clusters, returns a non-negative real number representing the quality of that clustering. Moreover, they may behave in a different way depending on the features of the data set and their input parameters values. Therefore, in most applications the resulting clustering scheme requires some sort of evaluation as regards its validity. The quality of clustering can be enhanced by using a Cellular Automata Classifier for information retrieval. In this study we take the view that if cellular automata with clustering is applied to search results (query-specific clustering), then it has the potential to increase the retrieval effectiveness compared both to that of static clustering and of conventional inverted file search. We conducted a number of experiments using ten document collections and eight hierarchic clustering methods. Our results show that the effectiveness of query-specific clustering with cellular automata is indeed higher and suggest that there is scope for its application to IR.
[ { "created": "Mon, 13 Jan 2014 00:05:34 GMT", "version": "v1" } ]
2014-01-14
[ [ "Sree", "Pokkuluri Kiran", "" ], [ "Babu", "Inampudi Ramesh", "" ] ]
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1401.2686
Kathryn Heal
J\'er\^ome Gilles and Kathryn Heal
A parameterless scale-space approach to find meaningful modes in histograms - Application to image and spectrum segmentation
null
null
null
null
cs.CV
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this paper, we present an algorithm to automatically detect meaningful modes in a histogram. The proposed method is based on the behavior of local minima in a scale-space representation. We show that the detection of such meaningful modes is equivalent in a two classes clustering problem on the length of minima scale-space curves. The algorithm is easy to implement, fast, and does not require any parameters. We present several results on histogram and spectrum segmentation, grayscale image segmentation and color image reduction.
[ { "created": "Mon, 13 Jan 2014 00:19:34 GMT", "version": "v1" } ]
2014-01-14
[ [ "Gilles", "Jérôme", "" ], [ "Heal", "Kathryn", "" ] ]
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1401.2688
Kiran Sree Pokkuluri Prof
Pokkuluri Kiran Sree, Inamupudi Ramesh Babu, SSSN Usha Devi N
PSMACA: An Automated Protein Structure Prediction Using MACA (Multiple Attractor Cellular Automata)
6 pages. arXiv admin note: substantial text overlap with arXiv:1310.4342, arXiv:1310.4495
Journal of Bioinformatics and Intelligent Control Vol 2, pp 211--215, 2013
10.1166/jbic.2013.1052
null
cs.CE cs.LG
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Protein Structure Predication from sequences of amino acid has gained a remarkable attention in recent years. Even though there are some prediction techniques addressing this problem, the approximate accuracy in predicting the protein structure is closely 75%. An automated procedure was evolved with MACA (Multiple Attractor Cellular Automata) for predicting the structure of the protein. Most of the existing approaches are sequential which will classify the input into four major classes and these are designed for similar sequences. PSMACA is designed to identify ten classes from the sequences that share twilight zone similarity and identity with the training sequences. This method also predicts three states (helix, strand, and coil) for the structure. Our comprehensive design considers 10 feature selection methods and 4 classifiers to develop MACA (Multiple Attractor Cellular Automata) based classifiers that are build for each of the ten classes. We have tested the proposed classifier with twilight-zone and 1-high-similarity benchmark datasets with over three dozens of modern competing predictors shows that PSMACA provides the best overall accuracy that ranges between 77% and 88.7% depending on the dataset.
[ { "created": "Mon, 13 Jan 2014 00:38:52 GMT", "version": "v1" } ]
2014-01-14
[ [ "Sree", "Pokkuluri Kiran", "" ], [ "Babu", "Inamupudi Ramesh", "" ], [ "N", "SSSN Usha Devi", "" ] ]
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1401.2690
Shuai Ma
Shuai Ma, Kaiyu Feng, Haixun Wang, Jianxin Li, Jinpeng Huai
Distance Landmarks Revisited for Road Graphs
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null
null
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cs.DB
http://creativecommons.org/licenses/by-nc-sa/3.0/
Computing shortest distances is one of the fundamental problems on graphs, and remains a {\em challenging} task today. {\em Distance} {\em landmarks} have been recently studied for shortest distance queries with an auxiliary data structure, referred to as {\em landmark} {\em covers}. This paper studies how to apply distance landmarks for fast {\em exact} shortest distance query answering on large road graphs. However, the {\em direct} application of distance landmarks is {\em impractical} due to the high space and time cost. To rectify this problem, we investigate novel techniques that can be seamlessly combined with distance landmarks. We first propose a notion of {\em hybrid landmark covers}, a revision of landmark covers. Second, we propose a notion of {\em agents}, each of which represents a small subgraph and holds good properties for fast distance query answering. We also show that agents can be computed in {\em linear time}. Third, we introduce graph partitions to deal with the remaining subgraph that cannot be captured by agents. Fourth, we develop a unified framework that seamlessly integrates our proposed techniques and existing optimization techniques, for fast shortest distance query answering. Finally, we experimentally verify that our techniques significantly improve the efficiency of shortest distance queries, using real-life road graphs.
[ { "created": "Mon, 13 Jan 2014 00:56:12 GMT", "version": "v1" } ]
2014-01-14
[ [ "Ma", "Shuai", "" ], [ "Feng", "Kaiyu", "" ], [ "Wang", "Haixun", "" ], [ "Li", "Jianxin", "" ], [ "Huai", "Jinpeng", "" ] ]
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1401.2692
Hua Sun
Hua Sun and Syed A. Jafar
On the Optimality of Treating Interference as Noise for $K$ user Parallel Gaussian Interference Networks
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null
null
null
cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
It has been shown recently by Geng et al. that in a $K$ user Gaussian interference network, if for each user the desired signal strength is no less than the sum of the strengths of the strongest interference from this user and the strongest interference to this user (all signal strengths measured in dB scale), then power control and treating interference as noise (TIN) is sufficient to achieve the entire generalized degrees of freedom (GDoF) region. Motivated by the intuition that the deterministic model of Avestimehr et al. (ADT deterministic model) is particularly suited for exploring the optimality of TIN, the results of Geng et al. are first re-visited under the ADT deterministic model, and are shown to directly translate between the Gaussian and deterministic settings. Next, we focus on the extension of these results to parallel interference networks, from a sum-capacity/sum-GDoF perspective. To this end, we interpret the explicit characterization of the sum-capacity/sum-GDoF of a TIN optimal network (without parallel channels) as a minimum weighted matching problem in combinatorial optimization, and obtain a simple characterization in terms of a partition of the interference network into vertex-disjoint cycles. Aided by insights from the cyclic partition, the sum-capacity optimality of TIN for $K$ user parallel interference networks is characterized for the ADT deterministic model, leading ultimately to corresponding GDoF results for the Gaussian setting. In both cases, subject to a mild invertibility condition the optimality of TIN is shown to extend to parallel networks in a separable fashion.
[ { "created": "Mon, 13 Jan 2014 01:16:49 GMT", "version": "v1" } ]
2014-01-14
[ [ "Sun", "Hua", "" ], [ "Jafar", "Syed A.", "" ] ]
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1401.2693
Yang Ding
Yang Ding
On List-decodability of Random Rank Metric Codes
8 pages, 1 figures
null
null
null
cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In the present paper, we consider list decoding for both random rank metric codes and random linear rank metric codes. Firstly, we show that, for arbitrary $0<R<1$ and $\epsilon>0$ ($\epsilon$ and $R$ are independent), if $0<\frac{n}{m}\leq \epsilon$, then with high probability a random rank metric code in $F_{q}^{m\times n}$ of rate $R$ can be list-decoded up to a fraction $(1-R-\epsilon)$ of rank errors with constant list size $L$ satisfying $L\leq O(1/\epsilon)$. Moreover, if $\frac{n}{m}\geq\Theta_R(\epsilon)$, any rank metric code in $F_{q}^{m\times n}$ with rate $R$ and decoding radius $\rho=1-R-\epsilon$ can not be list decoded in ${\rm poly}(n)$ time. Secondly, we show that if $\frac{n}{m}$ tends to a constant $b\leq 1$, then every $F_q$-linear rank metric code in $F_{q}^{m\times n}$ with rate $R$ and list decoding radius $\rho$ satisfies the Gilbert-Varsharmov bound, i.e., $R\leq (1-\rho)(1-b\rho)$. Furthermore, for arbitrary $\epsilon>0$ and any $0<\rho<1$, with high probability a random $F_q$-linear rank metric codes with rate $R=(1-\rho)(1-b\rho)-\epsilon$ can be list decoded up to a fraction $\rho$ of rank errors with constant list size $L$ satisfying $L\leq O(\exp(1/\epsilon))$.
[ { "created": "Mon, 13 Jan 2014 01:18:04 GMT", "version": "v1" }, { "created": "Thu, 23 Jan 2014 06:21:24 GMT", "version": "v2" } ]
2014-01-24
[ [ "Ding", "Yang", "" ] ]
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1401.2700
Elena Tolkova
Elena Tolkova
Comparative simulations of the 2011 Tohoku tsunami with MOST and Cliffs
6 pages, 4 figures; highlights one aspect of a paper in the process
Pure and Applied Geophysics, Vol. 171, Issue 9 (2014), pp. 2289-2314
10.1007/s00024-014-0825-8
null
physics.geo-ph physics.ao-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Wet-dry interface which appreciably increases accuracy of tsunami simulations with the MOST model (Method of Splitting Tsunamis, adapted by the NOAA for tsunami forecasting operations) is highlighted here with a few comparative simulations. The new solution, termed Cliffs, exceeds all MOST versions in accuracy of computing later waves. This is demonstrated with simulation of the Tohoku-2011 tsunami to Monterey Bay, CA, and into fiords, bays, and inlets of southeastern Alaska, followed by comparison with tide gage records.
[ { "created": "Mon, 13 Jan 2014 03:26:25 GMT", "version": "v1" } ]
2014-10-06
[ [ "Tolkova", "Elena", "" ] ]
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1401.2702
Brendan Lucier
Michal Feldman and Brendan Lucier
Clearing Markets via Bundles
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null
null
null
cs.GT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We study algorithms for combinatorial market design problems, where a set of heterogeneous and indivisible objects are priced and sold to potential buyers subject to equilibrium constraints. Extending the CWE notion introduced by Feldman et al. [STOC 2013], we introduce the concept of a Market-Clearing Combinatorial Walrasian Equilibium (MC-CWE) as a natural relaxation of the classical Walrasian equilibrium (WE) solution concept. The only difference between a MC-CWE and a WE is the ability for the seller to bundle the items prior to sale. This innocuous and natural bundling operation imposes a plethora of algorithmic and economic challenges and opportunities. Unlike WE, which is guaranteed to exist only for (gross) substitutes valuations, a MC-CWE always exists. The main algorithmic challenge, therefore, is to design computationally efficient mechanisms that generate MC-CWE outcomes that approximately maximize social welfare. For a variety of valuation classes encompassing substitutes and complements (including super-additive, single-minded and budget-additive valuations), we design polynomial-time MC-CWE mechanisms that provide tight welfare approximation results.
[ { "created": "Mon, 13 Jan 2014 03:53:04 GMT", "version": "v1" }, { "created": "Fri, 17 Jan 2014 19:53:37 GMT", "version": "v2" } ]
2014-01-20
[ [ "Feldman", "Michal", "" ], [ "Lucier", "Brendan", "" ] ]
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1401.2712
Ian Edmonds Dr
I. R. Edmonds
Association of a planetary tidal effect with the time variation of the ~13.5 day component of geomagnetic activity
23 pages, 14 figures
null
null
null
astro-ph.EP physics.space-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We show that there is a previously unreported quad-annual variation in the ~13.5 day component of the aa index of geomagnetic activity. We derive a model based on the planetary tidal effect at the solar surface due to Mercury and Jupiter that, when combined with an equinoctial response of the magnetosphere, predicts the times of occurrence of predominantly quad-annual variation or predominantly semi-annual variation in the ~13.5 day component of the aa index. In support of the model we show that, during years when the quad-annual variation in the ~13.5 day component of aa index is predominant there is a large component at the 88 day periodicity of Mercury in the ~13.5 day component of solar wind speed. As further support for the model we establish that significant peaks in the aa index spectrum are due to an 88 day modulation of 27 day period solar activity. The model also predicts the occurrence of planetary tidal effect maximum in anti-phase with solar cycle maximums around 1970 and we show this is consistent with prior observations of higher solar emissions during the 1975 solar cycle minimum than in the following solar cycle maximum. This effect offers a possible explanation of the reduced solar cycle maximums around 1970 and during the Dalton Minimum.
[ { "created": "Mon, 13 Jan 2014 05:14:17 GMT", "version": "v1" } ]
2014-01-14
[ [ "Edmonds", "I. R.", "" ] ]
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1401.2713
Marc Harper
Marc Harper
Entropy Rates of the Multidimensional Moran Processes and Generalizations
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math.DS cs.IT math.IT q-bio.PE
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The interrelationships of the fundamental biological processes natural selection, mutation, and stochastic drift are quantified by the entropy rate of Moran processes with mutation, measuring the long-run variation of a Markov process. The entropy rate is shown to behave intuitively with respect to evolutionary parameters such as monotonicity with respect to mutation probability (for the neutral landscape), relative fitness, and strength of selection. Strict upper bounds, depending only on the number of replicating types, for the entropy rate are given and the neutral fitness landscape attains the maximum in the large population limit. Various additional limits are computed including small mutation, weak and strong selection, and large population holding the other parameters constant, revealing the individual contributions and dependences of each evolutionary parameter on the long-run outcomes of the processes.
[ { "created": "Mon, 13 Jan 2014 05:15:51 GMT", "version": "v1" } ]
2014-01-14
[ [ "Harper", "Marc", "" ] ]
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1401.2714
Simoni Shah
Paritosh K. Pandya, Simoni S. Shah
Deterministic Logics for UL
null
null
null
null
cs.FL cs.LO
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The class of Unambiguous Star-Free Regular Languages (UL) was defined by Schutzenberger as the class of languages defined by Unambiguous Polynomials. UL has been variously characterized (over finite words) by logics such as TL[X_a,Y_a], UITL, TL[F,P], FO2[<], the variety DA of monoids, as well as partially-ordered two-way DFA (po2DFA). We revisit this language class with emphasis on notion of unambiguity and develop on the concept of Deterministic Logics for UL. The formulas of deterministic logics uniquely parse a word in order to evaluate satisfaction. We show that several deterministic logics robustly characterize UL. Moreover, we derive constructive reductions from these logics to the po2DFA automata. These reductions also allow us to show NP-complete satisfaction complexity for the deterministic logics considered. Logics such as TL[F,P], FO2[<] are not deterministic and have been shown to characterize UL using algebraic methods. However there has been no known constructive reduction from these logics to po2DFA. We use deterministic logics to bridge this gap. The language-equivalent po2DFA for a given TL[F,P] formula is constructed and we analyze its size relative to the size of the TL[F,P] formula. This is an efficient reduction which gives an alternate proof to NP-complete satisfiability complexity of TL[F,P] formulas.
[ { "created": "Mon, 13 Jan 2014 05:31:59 GMT", "version": "v1" } ]
2014-01-14
[ [ "Pandya", "Paritosh K.", "" ], [ "Shah", "Simoni S.", "" ] ]
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1401.2716
Lingfei Jin
Yang Ding, Lingfei Jin and Chaoping Xing
Erasure List-Decodable Codes from Random and Algebraic Geometry Codes
null
null
null
null
cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Erasure list decoding was introduced to correct a larger number of erasures with output of a list of possible candidates. In the present paper, we consider both random linear codes and algebraic geometry codes for list decoding erasure errors. The contributions of this paper are two-fold. Firstly, we show that, for arbitrary $0<R<1$ and $\epsilon>0$ ($R$ and $\epsilon$ are independent), with high probability a random linear code is an erasure list decodable code with constant list size $2^{O(1/\epsilon)}$ that can correct a fraction $1-R-\epsilon$ of erasures, i.e., a random linear code achieves the information-theoretic optimal trade-off between information rate and fraction of erasure errors. Secondly, we show that algebraic geometry codes are good erasure list-decodable codes. Precisely speaking, for any $0<R<1$ and $\epsilon>0$, a $q$-ary algebraic geometry code of rate $R$ from the Garcia-Stichtenoth tower can correct $1-R-\frac{1}{\sqrt{q}-1}+\frac{1}{q}-\epsilon$ fraction of erasure errors with list size $O(1/\epsilon)$. This improves the Johnson bound applied to algebraic geometry codes. Furthermore, list decoding of these algebraic geometry codes can be implemented in polynomial time.
[ { "created": "Mon, 13 Jan 2014 05:33:15 GMT", "version": "v1" } ]
2014-01-14
[ [ "Ding", "Yang", "" ], [ "Jin", "Lingfei", "" ], [ "Xing", "Chaoping", "" ] ]
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1401.2718
Azad Izmailov
Azad Ch. Izmailov
Trapping of slow-speed particles in a gas cell by the nonhomogeneous electromagnetic field intensifying with time
6 pages, 2 figures
null
null
null
physics.gen-ph physics.atom-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Author suggests and analyzes new universal trapping method of comparatively slow-speed particles of a rarefied gas medium in the potential well induced by the nonhomogeneous electromagnetic field increasing with time (up to some moment). Given method is especially effective at inelastic collisions of particles with walls of the gas cell when necessary preliminary slowdown of particles is possible for their following capture even to a highly shallow potential depth. Corresponding sufficiently compact and simple electromagnetic traps may be used for capture and accumulation not only slow-speed micro- and nano-particles in the high vacuum but also atoms and molecules of a rarefied gas in a cell.
[ { "created": "Mon, 13 Jan 2014 05:57:04 GMT", "version": "v1" } ]
2014-01-14
[ [ "Izmailov", "Azad Ch.", "" ] ]
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1401.2720
Vedran Novakovic
Vedran Novakovi\'c
A hierarchically blocked Jacobi SVD algorithm for single and multiple graphics processing units
Accepted for publication in SIAM Journal on Scientific Computing
SIAM J. Sci. Comput. 37 (2015), C1-C30
10.1137/140952429
null
cs.NA cs.DC cs.MS
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present a hierarchically blocked one-sided Jacobi algorithm for the singular value decomposition (SVD), targeting both single and multiple graphics processing units (GPUs). The blocking structure reflects the levels of GPU's memory hierarchy. The algorithm may outperform MAGMA's dgesvd, while retaining high relative accuracy. To this end, we developed a family of parallel pivot strategies on GPU's shared address space, but applicable also to inter-GPU communication. Unlike common hybrid approaches, our algorithm in a single GPU setting needs a CPU for the controlling purposes only, while utilizing GPU's resources to the fullest extent permitted by the hardware. When required by the problem size, the algorithm, in principle, scales to an arbitrary number of GPU nodes. The scalability is demonstrated by more than twofold speedup for sufficiently large matrices on a Tesla S2050 system with four GPUs vs. a single Fermi card.
[ { "created": "Mon, 13 Jan 2014 06:12:17 GMT", "version": "v1" }, { "created": "Sat, 7 Jun 2014 14:23:33 GMT", "version": "v2" }, { "created": "Sat, 27 Sep 2014 22:51:33 GMT", "version": "v3" } ]
2015-02-05
[ [ "Novaković", "Vedran", "" ] ]
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A hierarchically blocked Jacobi SVD algorithm for single and multiple graphics processing units
http://arxiv.org/abs/1401.2720v3
http://arxiv.org/pdf/1401.2720v3.pdf
https://github.com/venovako/GPUJACHx
true
false
https://paperswithcode.com/paper/a-hierarchically-blocked-jacobi-svd-algorithm
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1401.2724
J\"urgen M\"unch
Fabio Bella, J\"urgen M\"unch, Alexis Ocampo
Capturing Evidence From Wireless Internet Services Development
6 pages. The final publication is available at http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=1372130
Proceedings of The Eleventh Annual International Workshop on Software Technology and Engineering Practice (STEP), pp.33,39, 19-21 Sept. 2003
10.1109/STEP.2003.7
null
cs.SE cs.NI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The merging of the Internet with the Wireless services domain has created a potential market whose characteristics are new technologies and time-to-market pressure. The lack of knowledge about new technologies and the need to be competitive in a short time demand that software organizations learn quickly about this domain and its characteristics. Additionally, the effects of development techniques in this context need to be understood. Learning from previous experiences in such a changing environment demands a clear understanding of the evidence to be captured, and how it could be used in the future. This article presents definitions of quantitative and qualitative evidence, and templates for capturing such evidence in a systematic way. Such templates were used in the context of two pilot projects dealing with the development of Wireless Internet Services.
[ { "created": "Mon, 13 Jan 2014 06:36:16 GMT", "version": "v1" } ]
2014-01-14
[ [ "Bella", "Fabio", "" ], [ "Münch", "Jürgen", "" ], [ "Ocampo", "Alexis", "" ] ]
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1401.2727
Rourab Paul
Rourab Paul, Amlan Chakrabarti, Ranjan Ghosh
Hardware Implementation of four byte per clock RC4 algorithm
This is an unpublished draft version
null
null
null
cs.AR
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In the field of cryptography till date the 2-byte in 1-clock is the best known RC4 hardware design [1], while 1-byte in 1-clock [2], and the 1-byte in 3 clocks [3][4] are the best known implementation. The design algorithm in[2] considers two consecutive bytes together and processes them in 2 clocks. The design [1] is a pipelining architecture of [2]. The design of 1-byte in 3-clocks is too much modular and clock hungry. In this paper considering the RC4 algorithm, as it is, a simpler RC4 hardware design providing higher throughput is proposed in which 6 different architecture has been proposed. In design 1, 1-byte is processed in 1-clock, design 2 is a dynamic KSA-PRGA architecture of Design 1. Design 3 can process 2 byte in a single clock, where as Design 4 is Dynamic KSA-PRGA architecture of Design 3. Design 5 and Design 6 are parallelization architecture design 2 and design 4 which can compute 4 byte in a single clock. The maturity in terms of throughput, power consumption and resource usage, has been achieved from design 1 to design 6. The RC4 encryption and decryption designs are respectively embedded on two FPGA boards as co-processor hardware, the communication between the two boards performed using Ethernet.
[ { "created": "Mon, 13 Jan 2014 06:57:21 GMT", "version": "v1" } ]
2014-01-14
[ [ "Paul", "Rourab", "" ], [ "Chakrabarti", "Amlan", "" ], [ "Ghosh", "Ranjan", "" ] ]
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1401.2729
Young-Wan Kim
Young-Wan Kim, Kang-Ho Lee, and Kicheon Kang
Vacuum-fluctuation-induced Dephasing of a Qubit in Circuit Quantum Electrodynamics
6pages, 5 figures
J. Phys. Soc. Jpn., Vol.83, No.7, 073704 (2014)
10.7566/JPSJ.83.073704
null
cond-mat.mes-hall physics.atom-ph quant-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We investigate the measurement-induced dephasing of a qubit coupled with a single-mode cavity in the vacuum limit. Dephasing of the qubit state takes place through the ntanglement of the qubit and the single probe photon sent to the cavity, while the cavity mode never occupies a photon. We find that the qubit state is dephased even if the cavity is always in the vacuum state. This dephasing is caused purely by the interaction between the qubit and the vacuum field. We also show that this vacuum-fluctuation-induced dephasing takes place much faster than the spontaneous decay of the qubit excited state, and therefore our prediction is observable in a real experiment.
[ { "created": "Mon, 13 Jan 2014 07:12:52 GMT", "version": "v1" }, { "created": "Tue, 8 Jul 2014 07:57:26 GMT", "version": "v2" } ]
2014-07-09
[ [ "Kim", "Young-Wan", "" ], [ "Lee", "Kang-Ho", "" ], [ "Kang", "Kicheon", "" ] ]
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1401.2730
J\"urgen M\"unch
Ansgar Lamersdorf, J\"urgen M\"unch, Alicia Fern\'andez-del Viso Torre, Carlos Rebate S\'anchez, Dieter Rombach
Estimating the Effort Overhead in Global Software Development
10 pages. The final publication is available at http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=5581517
Proceedings of the IEEE International Conference on Global Software Engineering (ICGSE 2010), Princeton, USA, August 23-26 2010
10.1109/ICGSE.2010.38
null
cs.SE
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Models for effort and cost estimation are important for distributed software development as well as for collocated software and system development. Standard cost models only insufficiently consider the characteristics of distributed development such as dissimilar abilities at the different sites or significant overhead due to remote collaboration. Therefore, explicit cost models for distributed development are needed. In this article, we present the initial development of a cost overhead model for a Spanish global software development organization. The model was developed using the CoBRA approach for cost estimation. As a result, cost drivers for the specific distributed development context were identified and their impact was quantified on an empirical basis. The article presents related work, an overview of the approach, and its application in the industrial context. Finally, we sketch the inclusion of the model in an approach for systematic task allocation and give an overview of future work.
[ { "created": "Mon, 13 Jan 2014 07:13:58 GMT", "version": "v1" } ]
2014-01-14
[ [ "Lamersdorf", "Ansgar", "" ], [ "Münch", "Jürgen", "" ], [ "Torre", "Alicia Fernández-del Viso", "" ], [ "Sánchez", "Carlos Rebate", "" ], [ "Rombach", "Dieter", "" ] ]
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1401.2731
J\"urgen M\"unch
Ansgar Lamersdorf, J\"urgen M\"unch, Alicia Fern\'andez-del Viso Torre, Carlos Rebate S\'anchez, Markus Heinz, Dieter Rombach
A Rule-based Model for Customized Risk Identification in Distributed Software Development Projects
10 pages. The final publication is available at http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=5581511
Proceedings of the IEEE International Conference on Global Software Engineering (ICGSE 2010), Princeton, USA, August 23-26 2010
10.1109/ICGSE.2010.32
null
cs.SE
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Many project risks in distributed software development are very different from the ones in collocated development and therefore are often overlooked. At the same time, they depend to a large extent on project-specific characteristics. This article presents a model for identifying risks early in a project. This model systematically captures experiences from past projects and is based on a set of logical rules describing how project characteristics influence typical risks in distributed development. Thus, the model is able to assess risks individually for each project. It was developed by applying qualitative content analysis to 19 interviews with practitioners. An evaluation using expert interviews showed that the risks identified by the model matched the actual experiences in 81% of the cases; of these, 40% have not been regarded yet at project start. The article describes the concepts of the model, its instantiation and evaluation, followed by a conclusion and future work.
[ { "created": "Mon, 13 Jan 2014 07:17:20 GMT", "version": "v1" } ]
2014-01-14
[ [ "Lamersdorf", "Ansgar", "" ], [ "Münch", "Jürgen", "" ], [ "Torre", "Alicia Fernández-del Viso", "" ], [ "Sánchez", "Carlos Rebate", "" ], [ "Heinz", "Markus", "" ], [ "Rombach", "Dieter", "" ] ]
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1401.2732
Rourab Paul
Rourab Paul, Amlan Chakrabarti, Ranjan Ghosh
Fault Detection for RC4 Algorithm and its Implementation on FPGA Platform
Published Book Title: Elsevier Science and Technology, ICCN 2013, Bangalore, Page(s): 224 - 232, Volume 3, DOI-03.elsevierst.2013.3.ICCN25, ISBN :9789351071044
null
null
null
cs.AR
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In hardware implementation of a cryptographic algorithm, one may achieve leakage of secret information by creating scopes to introduce controlled faulty bit(s) even though the algorithm is mathematically a secured one. The technique is very effective in respect of crypto processors embedded in smart cards. In this paper few fault detecting architectures for RC4 algorithm are designed and implemented on Virtex5(ML505, LX110t) FPGA board. The results indicate that the proposed architectures can handle most of the faults without loss of throughput consuming marginally additional hardware and power.
[ { "created": "Mon, 13 Jan 2014 07:19:52 GMT", "version": "v1" } ]
2016-10-31
[ [ "Paul", "Rourab", "" ], [ "Chakrabarti", "Amlan", "" ], [ "Ghosh", "Ranjan", "" ] ]
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1401.2736
Ya Cheng Professor
Jintian Lin, Yingxin Xu, Jialei Tang, Nengwen Wang, Jiangxin Song, Fei He, Wei Fang, and Ya Cheng
Fabrication of three-dimensional microdisk resonators in calcium fluoride by femtosecond laser micromachining
7 pages, 3 figures
null
10.1007/s00339-014-8388-1
null
physics.optics
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We report on fabrication of on-chip calcium fluoride (CaF2) microdisk resonators using water-assisted femtosecond laser micromachining. Focused ion beam (FIB) milling is used to create ultra-smooth sidewalls. The quality (Q)-factors of the fabricated microresonators are measured to be 4.2x10^4 at wavelengths near 1550 nm. The Q factor is mainly limited by the scattering from the bottom surface of the disk whose roughness remains high due to the femtosecond laser micromachining process. This technique facilitates formation of on-chip microresonators on various kinds of bulk crystalline materials, which can benefit a wide range of applications such as nonlinear optics, quantum optics, and chip-level integration of photonic devices.
[ { "created": "Mon, 13 Jan 2014 07:31:26 GMT", "version": "v1" } ]
2015-06-18
[ [ "Lin", "Jintian", "" ], [ "Xu", "Yingxin", "" ], [ "Tang", "Jialei", "" ], [ "Wang", "Nengwen", "" ], [ "Song", "Jiangxin", "" ], [ "He", "Fei", "" ], [ "Fang", "Wei", "" ], [ "Cheng", "Ya", "" ] ]
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1401.2739
David Cebron
David C\'ebron (ISTerre), Stijn Vantieghem (ETHZ), Wietze Herreman (LIMSI)
Libration driven multipolar instabilities
null
Journal of Fluid Mechanics 739 (2014) 502-543
10.1017/jfm.2013.623
null
physics.flu-dyn
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We consider rotating flows in non-axisymmetric enclosures that are driven by libration, i.e. by a small periodic modulation of the rotation rate. Thanks to its simplicity, this model is relevant to various contexts, from industrial containers (with small oscillations of the rotation rate) to fluid layers of terrestial planets (with length-of-day variations). Assuming a multipolar $n$-fold boundary deformation, we first obtain the two-dimensional basic flow. We then perform a short-wavelength local stability analysis of the basic flow, showing that an instability may occur in three dimensions. We christen it the Libration Driven Multipolar Instability (LDMI). The growth rates of the LDMI are computed by a Floquet analysis in a systematic way, and compared to analytical expressions obtained by perturbation methods. We then focus on the simplest geometry allowing the LDMI, a librating deformed cylinder. To take into account viscous and confinement effects, we perform a global stability analysis, which shows that the LDMI results from a parametric resonance of inertial modes. Performing numerical simulations of this librating cylinder, we confirm that the basic flow is indeed established and report the first numerical evidence of the LDMI. Numerical results, in excellent agreement with the stability results, are used to explore the non-linear regime of the instability (amplitude and viscous dissipation of the driven flow). We finally provide an example of LDMI in a deformed spherical container to show that the instability mechanism is generic. Our results show that the previously studied libration driven elliptical instability simply corresponds to the particular case $n=2$ of a wider class of instabilities. Summarizing, this work shows that any oscillating non-axisymmetric container in rotation may excite intermittent, space-filling LDMI flows, and this instability should thus be easy to observe experimentally.
[ { "created": "Mon, 13 Jan 2014 07:47:23 GMT", "version": "v1" } ]
2015-06-18
[ [ "Cébron", "David", "", "ISTerre" ], [ "Vantieghem", "Stijn", "", "ETHZ" ], [ "Herreman", "Wietze", "", "LIMSI" ] ]
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1401.2740
Cedric Pardanaud
Cedric Pardanaud (PIIM), C. Martin (CRISMAT), P. Roubin (PIIM)
Multiwavelength Raman spectroscopy analysis of a large sampling of disordered carbons extracted from the Tore Supra tokamak
null
Vibrational Spectroscopy 70 (2013) 187-192
null
null
physics.chem-ph cond-mat.mtrl-sci
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Disordered carbon often exhibit a complex Raman spectrum, with four to six components. Here, a large variety of disordered carbons, forming a collection of samples with a great variety of structures, are analysed using multi-wavelength Raman microscopy (325.0, 514.5, 785.0 nm). They allow us to extend Raman behaviour known for nano-crystalline graphite to amorphous carbons, (dependence with the excitation wavelength) and other known for amorphous carbons to nano-crystalline graphite, (differentiation of the smallest cluster size probed using different excitation wavelengths). Experimental spectra were compared to simulated spectra, built using known laws, to evidence a new source of broadening.
[ { "created": "Mon, 13 Jan 2014 07:54:00 GMT", "version": "v1" } ]
2014-01-14
[ [ "Pardanaud", "Cedric", "", "PIIM" ], [ "Martin", "C.", "", "CRISMAT" ], [ "Roubin", "P.", "", "PIIM" ] ]
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1401.2751
Frederic Prost
Dominique Duval and Rachid Echahed and Frederic Prost and Leila Ribeiro
Transformation of Attributed Structures with Cloning (Long Version)
null
null
null
null
cs.SE
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Copying, or cloning, is a basic operation used in the specification of many applications in computer science. However, when dealing with complex structures, like graphs, cloning is not a straightforward operation since a copy of a single vertex may involve (implicitly)copying many edges. Therefore, most graph transformation approaches forbid the possibility of cloning. We tackle this problem by providing a framework for graph transformations with cloning. We use attributed graphs and allow rules to change attributes. These two features (cloning/changing attributes) together give rise to a powerful formal specification approach. In order to handle different kinds of graphs and attributes, we first define the notion of attributed structures in an abstract way. Then we generalise the sesqui-pushout approach of graph transformation in the proposed general framework and give appropriate conditions under which attributed structures can be transformed. Finally, we instantiate our general framework with different examples, showing that many structures can be handled and that the proposed framework allows one to specify complex operations in a natural way.
[ { "created": "Mon, 13 Jan 2014 08:39:08 GMT", "version": "v1" } ]
2014-01-14
[ [ "Duval", "Dominique", "" ], [ "Echahed", "Rachid", "" ], [ "Prost", "Frederic", "" ], [ "Ribeiro", "Leila", "" ] ]
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1401.2753
Peilin Zhao
Peilin Zhao, Tong Zhang
Stochastic Optimization with Importance Sampling
29 pages
null
null
null
stat.ML cs.LG
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Uniform sampling of training data has been commonly used in traditional stochastic optimization algorithms such as Proximal Stochastic Gradient Descent (prox-SGD) and Proximal Stochastic Dual Coordinate Ascent (prox-SDCA). Although uniform sampling can guarantee that the sampled stochastic quantity is an unbiased estimate of the corresponding true quantity, the resulting estimator may have a rather high variance, which negatively affects the convergence of the underlying optimization procedure. In this paper we study stochastic optimization with importance sampling, which improves the convergence rate by reducing the stochastic variance. Specifically, we study prox-SGD (actually, stochastic mirror descent) with importance sampling and prox-SDCA with importance sampling. For prox-SGD, instead of adopting uniform sampling throughout the training process, the proposed algorithm employs importance sampling to minimize the variance of the stochastic gradient. For prox-SDCA, the proposed importance sampling scheme aims to achieve higher expected dual value at each dual coordinate ascent step. We provide extensive theoretical analysis to show that the convergence rates with the proposed importance sampling methods can be significantly improved under suitable conditions both for prox-SGD and for prox-SDCA. Experiments are provided to verify the theoretical analysis.
[ { "created": "Mon, 13 Jan 2014 08:47:44 GMT", "version": "v1" }, { "created": "Fri, 2 Jan 2015 09:17:48 GMT", "version": "v2" } ]
2015-01-05
[ [ "Zhao", "Peilin", "" ], [ "Zhang", "Tong", "" ] ]
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1401.2754
Julien Cardin
Alexandre Fafin (CIMAP), Julien Cardin (CIMAP), Christian Dufour (CIMAP), Fabrice Gourbilleau (CIMAP)
Modeling of the electromagnetic field and level populations in a waveguide amplifier: a multi-scale time problem
null
Optics Express 21, 20 (2013) 24171-24184
10.1364/OE.21.024171
null
physics.optics cond-mat.mtrl-sci physics.comp-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
A new algorithm based on auxiliary differential equation and finite difference time domain method (ADE-FDTD method) is presented to model a waveguide whose active layer is constituted of a silica matrix doped with rare-earth and silicon nanograins. The typical lifetime of rare-earth can be as large as some ms, whereas the electromagnetic field in a visible range and near-infrared is characterized by a period of the order of fs. Due to the large difference between these two characteristic times, the conventional ADE-FDTD method is not suited to treat such systems. A new algorithm is presented so that the steady state of rare earth and silicon nanograins electronic levels populations along with the electromagnetic field can be fully described. This algorithm is stable and applicable to a wide range of optical gain materials in which large differences of characteristic lifetimes are present.
[ { "created": "Mon, 13 Jan 2014 08:58:50 GMT", "version": "v1" } ]
2014-01-14
[ [ "Fafin", "Alexandre", "", "CIMAP" ], [ "Cardin", "Julien", "", "CIMAP" ], [ "Dufour", "Christian", "", "CIMAP" ], [ "Gourbilleau", "Fabrice", "", "CIMAP" ] ]
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1401.2755
Thomas Philbin
I.R. Hooper and T.G. Philbin
Transmutation of singularities and zeros in graded index optical instruments: a methodology for designing practical devices
14 pages
Optics Express 21, 32313 (2013)
10.1364/OE.21.032313
null
physics.optics
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We describe a design methodology for modifying the refractive index profile of graded-index optical instruments that incorporate singularities or zeros in their refractive index. The process maintains the device performance whilst resulting in graded profiles that are all-dielectric, do not require materials with unrealistic values, and that are impedance matched to the bounding medium. This is achieved by transmuting the singularities (or zeros) using the formalism of transformation optics, but with an additional boundary condition requiring the gradient of the co- ordinate transformation be continuous. This additional boundary condition ensures that the device is impedance matched to the bounding medium when the spatially varying permittivity and permeability profiles are scaled to realizable values. We demonstrate the method in some detail for an Eaton lens, before describing the profiles for an "invisible disc" and "multipole" lenses.
[ { "created": "Mon, 13 Jan 2014 09:03:15 GMT", "version": "v1" } ]
2015-06-18
[ [ "Hooper", "I. R.", "" ], [ "Philbin", "T. G.", "" ] ]
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1401.2757
J\"urgen M\"unch
Michael Kl\"as, Haruka Nakao, Frank Elberzhager, J\"urgen M\"unch
Predicting Defect Content and Quality Assurance Effectiveness by Combining Expert Judgment and Defect Data - A Case Study
10 pages. The final publication is available at http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=4700306
Proceedings of the 2008 19th International Symposium on Software Reliability Engineering, ISSRE '08, page 17-26, Washington, DC, USA, 2008
10.1109/ISSRE.2008.43
null
cs.SE
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Planning quality assurance (QA) activities in a systematic way and controlling their execution are challenging tasks for companies that develop software or software-intensive systems. Both require estimation capabilities regarding the effectiveness of the applied QA techniques and the defect content of the checked artifacts. Existing approaches for these purposes need extensive measurement data from historical projects. Due to the fact that many companies do not collect enough data for applying these approaches (especially for the early project lifecycle), they typically base their QA planning and controlling solely on expert opinion. This article presents a hybrid method that combines commonly available measurement data and context-specific expert knowledge. To evaluate the method's applicability and usefulness, we conducted a case study in the context of independent verification and validation activities for critical software in the space domain. A hybrid defect content and effectiveness model was developed for the software requirements analysis phase and evaluated with available legacy data. One major result is that the hybrid model provides improved estimation accuracy when compared to applicable models based solely on data. The mean magnitude of relative error (MMRE) determined by cross-validation is 29.6% compared to 76.5% obtained by the most accurate data-based model.
[ { "created": "Mon, 13 Jan 2014 09:08:53 GMT", "version": "v1" } ]
2014-01-14
[ [ "Kläs", "Michael", "" ], [ "Nakao", "Haruka", "" ], [ "Elberzhager", "Frank", "" ], [ "Münch", "Jürgen", "" ] ]
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1401.2768
Hanumantha Raju MC
M. C. Hanumantharaju and M. T. Gopalakrishna
Design of novel architectures and field programmable gate arrays implementation of two dimensional gaussian surround function
10 Pages, 14 figures (including authors photo), International Conference on Image & Signal Processing (ICIP2013)
International Journal of Information Processing, ISSN : 0973-8215, 7(4), 66-75, 2013
null
null
cs.AR
http://creativecommons.org/licenses/by/3.0/
A new design and novel architecture suitable for FPGA/ASIC implementation of a 2D Gaussian surround function for image processing application is presented in this paper. The proposed scheme results in enormous savings of memory normally required for 2D Gaussian function implementation. In the present work, the Gaussian symmetric characteristics which quickly falls off toward plus/minus infinity has been used in order to save the memory. The 2D Gaussian function implementation is presented for use in applications such as image enhancement, smoothing, edge detection and filtering etc. The FPGA implementation of the proposed 2D Gaussian function is capable of processing (blurring, smoothing, and convolution) high resolution color pictures of size up to $1600\times1200$ pixels at the real time video rate of 30 frames/sec. The Gaussian design exploited here has been used in the core part of retinex based color image enhancement. Therefore, the design presented produces Gaussian output with three different scales, namely, 16, 64 and 128. The design was coded in Verilog, a popular hardware design language used in industries, conforming to RTL coding guidelines and fits onto a single chip with a gate count utilization of 89,213 gates. Experimental results presented confirms that the proposed method offers a new approach for development of large sized Gaussian pyramid while reducing the on-chip memory utilization.
[ { "created": "Mon, 13 Jan 2014 09:52:08 GMT", "version": "v1" } ]
2014-01-14
[ [ "Hanumantharaju", "M. C.", "" ], [ "Gopalakrishna", "M. T.", "" ] ]
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1401.2770
Elena Zubova
Natalia A. Kovaleva, Irina P. Kikot, Mikhail A. Mazo and Elena A. Zubova
The "sugar" coarse-grained DNA model
In this version, the article is divided into 2 parts: the main text and Supplemental Material. The introduction and discussion are extended, many small corrections are made. Four video files are enclosed. The results are the same as in the previous version
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10.1007/s00894-017-3209-z
null
physics.chem-ph q-bio.BM
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
More than twenty coarse-grained (CG) DNA models have been developed for simulating the behavior of this molecule under various conditions, including those required for nanotechnology. However, none of these models reproduces the DNA polymorphism associated with conformational changes in the ribose rings of the DNA backbone. These changes make an essential contribution to the DNA local deformability and provide the possibility of the transition of the DNA double helix from the B-form to the A-form during interactions with biological molecules. We propose a CG representation of the ribose conformational flexibility. We substantiate the choice of the CG sites (6 per nucleotide) needed for the "sugar" GC DNA model, and obtain the potentials of the CG interactions between the sites by the "bottom-up" approach using the all-atom AMBER force field. We show that the representation of the ribose flexibility requires one non-harmonic and one three-particle potential, the forms of both the potentials being different from the ones generally used. The model also includes (i) explicit representation of ions (in an implicit solvent) and (ii) sequence dependence. With these features, the sugar CG DNA model reproduces (with the same parameters) both the B- and A- stable forms under corresponding conditions and demonstrates both the A to B and the B to A phase transitions.
[ { "created": "Mon, 13 Jan 2014 10:10:56 GMT", "version": "v1" }, { "created": "Fri, 23 Oct 2015 07:23:03 GMT", "version": "v2" }, { "created": "Thu, 7 Jul 2016 08:20:44 GMT", "version": "v3" } ]
2019-03-19
[ [ "Kovaleva", "Natalia A.", "" ], [ "Kikot", "Irina P.", "" ], [ "Mazo", "Mikhail A.", "" ], [ "Zubova", "Elena A.", "" ] ]
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1401.2774
Majid Gerami
Majid Gerami, Ming Xiao
Exact Optimized-cost Repair in Multi-hop Distributed Storage Networks
(To appear in ICC 2014)
null
null
null
cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The problem of exact repair of a failed node in multi-hop networked distributed storage systems is considered. Contrary to the most of the current studies which model the repair process by the direct links from surviving nodes to the new node, the repair is modeled by considering the multi-hop network structure, and taking into account that there might not exist direct links from all the surviving nodes to the new node. In the repair problem of these systems, surviving nodes may cooperate to transmit the repair traffic to the new node. In this setting, we define the total number of packets transmitted between nodes as repair-cost. A lower bound of the repaircost can thus be found by cut-set bound analysis. In this paper, we show that the lower bound of the repair-cost is achievable for the exact repair of MDS codes in tandem and grid networks, thus resulting in the minimum-cost exact MDS codes. Further, two suboptimal (achievable) bounds for the large scale grid networks are proposed.
[ { "created": "Mon, 13 Jan 2014 10:37:55 GMT", "version": "v1" } ]
2014-01-14
[ [ "Gerami", "Majid", "" ], [ "Xiao", "Ming", "" ] ]
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1401.2777
Andre Rubbia
F. Bay, C. Cantini, S. Murphy, F. Resnati, A. Rubbia, F. Sergiampietri, S. Wu
Evidence of electric breakdown induced by bubbles in liquid argon
7 pages, 3 figures, based on a talk given at the High Voltage in Noble Liquids (HVNL13) Workshop, FNAL, 8-9 November 2013
null
null
null
physics.ins-det
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We report on the results of a high voltage test in liquid argon in order to measure its dielectric rigidity. Under stable conditions and below the boiling point, liquid argon was found to sustain a uniform electric field of 100 kV/cm, applied in a region of 20 cm$^2$ area across 1 cm thick gap. When the liquid is boiling, breakdowns may occur at electric fields as low as 40 kV/cm. This test is one of the R&D efforts towards the Giant Liquid Argon Charge Imaging ExpeRiment (GLACIER) as proposed Liquid Argon Time Projection Chamber (LAr TPC) for the LBNO observatory for neutrino physics, astrophysics and nucleon decay searches.
[ { "created": "Mon, 13 Jan 2014 10:42:11 GMT", "version": "v1" } ]
2014-01-14
[ [ "Bay", "F.", "" ], [ "Cantini", "C.", "" ], [ "Murphy", "S.", "" ], [ "Resnati", "F.", "" ], [ "Rubbia", "A.", "" ], [ "Sergiampietri", "F.", "" ], [ "Wu", "S.", "" ] ]
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1401.2778
Loet Leydesdorff
Loet Leydesdorff, Floortje Alkemade, Gaston Heimeriks, and Rinke Hoekstra
Patents as Instruments for Exploring Innovation Dynamics: Geographic and Technological Perspectives on "Photovoltaic Cells"
accepted for publication in Scientometrics on September 10, 2014
null
null
null
cs.CY cs.DL
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The dynamics of innovation are nonlinear and complex: geographical, technological, and economic selection environments can be expected to interact. Can patents provide an analytical lens to this process in terms of different attributes such as inventor addresses, classification codes, backward and forward citations, etc.? Two recently developed patent maps with interactive overlay techniques--Google Maps and maps based on citation relations among International Patent Classifications (IPC)--are elaborated into dynamic versions that allow for online animations and comparisons by using split screens. Various forms of animation are explored. The recently developed Cooperative Patent Classifications (CPC) of the U.S. Patent and Trade Office (USPTO) and the European Patent Office (EPO) provide new options for a precise delineation of samples in both USPTO data and the Worldwide Patent Statistics Database (PatStat) of EPO. Among the "technologies for the mitigation of climate change" (class Y02), we zoom in on nine material technologies for photovoltaic cells; and focus on one of them (CuInSe2) as a lead case. The longitudinal development of Rao-Stirling diversity in the IPC-based maps provides a heuristics for studying technological generations during the period under study (1975-2012). The sequencing of generations prevails in USPTO data more than in PatStat data because PatStat aggregates patent information from countries in different stages of technological development, whereas one can expect USPTO patents to be competitive at the technological edge.
[ { "created": "Mon, 13 Jan 2014 10:43:40 GMT", "version": "v1" }, { "created": "Wed, 10 Sep 2014 14:47:39 GMT", "version": "v2" } ]
2014-09-11
[ [ "Leydesdorff", "Loet", "" ], [ "Alkemade", "Floortje", "" ], [ "Heimeriks", "Gaston", "" ], [ "Hoekstra", "Rinke", "" ] ]
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Patents as Instruments for Exploring Innovation Dynamics: Geographic and Technological Perspectives on "Photovoltaic Cells"
https://arxiv.org/abs/1401.2778v2
https://arxiv.org/pdf/1401.2778v2.pdf
https://github.com/Data2Semantics/PatViz
true
true
https://paperswithcode.com/paper/patents-as-instruments-for-exploring
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1401.2779
Lakshmi S Mohan Ms.
Lakshmi S. Mohan, Anushree Ghosh, Moon Moon Devi, Daljeet Kaur, Sandhya Choubey, Amol Dighe, D. Indumathi, M.V.N. Murthy and Md. Naimuddin
Simulation studies of hadron energy resolution as a function of iron plate thickness at INO-ICAL
null
2014 JINST 9 T09003
10.1088/1748-0221/9/09/T09003
null
physics.ins-det hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We report on a detailed simulation study of the hadron energy resolution as a function of the thickness of the absorber plates for the proposed Iron Calorimeter (ICAL) detector at the India-based Neutrino Observatory (INO). We compare the hadron resolutions obtained with absorber thicknesses in the range 1.5--8 cm for neutrino interactions in the energy range 2--15 GeV, which is relevant to hadron production in atmospheric neutrino interactions. We find that at lower energies, the thickness dependence of energy resolution is steeper than at higher energies, however there is a thickness-independent contribution that dominates at the lower thicknesses discussed in this work. As a result, the gain in hadron energy resolution with decreasing plate thickness is marginal. We present the results in the form of fits to a function with energy-dependent exponent.
[ { "created": "Mon, 13 Jan 2014 10:46:30 GMT", "version": "v1" }, { "created": "Wed, 11 Mar 2015 23:26:45 GMT", "version": "v2" } ]
2015-03-13
[ [ "Mohan", "Lakshmi S.", "" ], [ "Ghosh", "Anushree", "" ], [ "Devi", "Moon Moon", "" ], [ "Kaur", "Daljeet", "" ], [ "Choubey", "Sandhya", "" ], [ "Dighe", "Amol", "" ], [ "Indumathi", "D.", "" ], [ "Murthy", "M. V. N.", "" ], [ "Naimuddin", "Md.", "" ] ]
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1401.2782
Vincenzo De Florio
Hong Sun, Vincenzo De Florio, Ning Gui, Chris Blondia
Participant: A New Concept for Optimally Assisting the Elder People
Twentieth IEEE International Symposium on Computer-Based Medical Systems, 2007. CBMS '07
null
10.1109/CBMS.2007.82
null
cs.CY
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Elder people are becoming a predominant aspect of our societies. As such, solutions both efficacious and cost-effective need to be sought. The approach pursued so far to solve this problem used to increase the number of people working in the health sector, e.g. doctors, nurses, etc. This increases the costs, which is becoming a big burden for countries. In this paper we propose a new concept in the health management of elder people, which we name as "participant". We propose the "participant" concept to encourage elder people to participate in those group activities that they are able to. Their roles in these activities are not passively requesting help, but actively participating to some healthcare processes. Characteristics of the participant approach are that medical resources are efficiently spared with this model, and the social network of the elder people is kept. A "virtual community" for mutual assistance is set up in this paper, and the simulations demonstrate that the "participant" model could fully utilize the community resources. Furthermore, the psychological health of the elder people will be improved.
[ { "created": "Mon, 13 Jan 2014 10:53:28 GMT", "version": "v1" } ]
2014-01-14
[ [ "Sun", "Hong", "" ], [ "De Florio", "Vincenzo", "" ], [ "Gui", "Ning", "" ], [ "Blondia", "Chris", "" ] ]
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1401.2794
Natalia Dueck
N. D\"uck and K.-H. Zimmermann
On Binomial Ideals associated to Linear Codes
null
null
null
null
math.AC cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Recently, it was shown that a binary linear code can be associated to a binomial ideal given as the sum of a toric ideal and a non-prime ideal. Since then two different generalizations have been provided which coincide for the binary case. In this paper, we establish some connections between the two approaches. In particular, we show that the corresponding code ideals are related by elimination. Finally, a new heuristic decoding method for linear codes over prime fields is discussed using Gr\"obner bases.
[ { "created": "Mon, 13 Jan 2014 11:30:09 GMT", "version": "v1" } ]
2014-01-14
[ [ "Dück", "N.", "" ], [ "Zimmermann", "K. -H.", "" ] ]
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1401.2799
Feiyu Li
F. Y. Li, Z. M. Sheng, M. Chen, L. L. Yu, J. Meyer-ter-Vehn, W. B. Mori, and J. Zhang
Radially Polarized, Half-Cycle, Attosecond Pulses from Laser Wakefields through Coherent Synchrotron Radiation
5 pages, 4 figures
null
10.1103/PhysRevE.90.043104
null
physics.plasm-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Attosecond bursts of coherent synchrotron-like radiation are found when driving ultrathin relativistic electron disks in a quasi-one-dimensional regime of wakefield acceleration, in which the laser waist is larger than the wake wavelength. The disks of overcritical density shrink radially due to the focusing wake fields, thus providing the transverse currents for the emission of an intense, radially polarized, half-cycle pulse of about 100 attoseconds in duration. The electromagnetic pulse first focuses to a peak intensity 10 times larger ($7\times10^{20}\rm W/cm^2$) than the driving pulse and then emerges as a conical beam. Saturation of the emission amplitudes is derived analytically and in agreement with particle-in-cell simulation. By making use of gas targets instead of solids to form the ultrathin disks, the new scheme allows for high repetition rate required for applications.
[ { "created": "Mon, 13 Jan 2014 11:41:31 GMT", "version": "v1" }, { "created": "Tue, 6 May 2014 00:21:13 GMT", "version": "v2" } ]
2015-06-18
[ [ "Li", "F. Y.", "" ], [ "Sheng", "Z. M.", "" ], [ "Chen", "M.", "" ], [ "Yu", "L. L.", "" ], [ "Meyer-ter-Vehn", "J.", "" ], [ "Mori", "W. B.", "" ], [ "Zhang", "J.", "" ] ]
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1401.2800
Wataru Kurebayashi
Wataru Kurebayashi, Sho Shirasaka, and Hiroya Nakao
Phase Reduction Method for Strongly Perturbed Limit Cycle Oscillators
null
Phys. Rev. Lett. 111, 214101 (2013)
10.1103/PhysRevLett.111.214101
null
nlin.PS cond-mat.dis-nn nlin.AO nlin.CD physics.bio-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The phase reduction method for limit cycle oscillators subjected to weak perturbations has significantly contributed to theoretical investigations of rhythmic phenomena. We here propose a generalized phase reduction method that is also applicable to strongly perturbed limit cycle oscillators. The fundamental assumption of our method is that the perturbations can be decomposed into a slowly varying component as compared to the amplitude relaxation time and remaining weak fluctuations. Under this assumption, we introduce a generalized phase parameterized by the slowly varying component and derive a closed equation for the generalized phase describing the oscillator dynamics. The proposed method enables us to explore a broader class of rhythmic phenomena, in which the shape and frequency of the oscillation may vary largely because of the perturbations. We illustrate our method by analyzing the synchronization dynamics of limit cycle oscillators driven by strong periodic signals. It is shown that the proposed method accurately predicts the synchronization properties of the oscillators, while the conventional method does not.
[ { "created": "Mon, 13 Jan 2014 11:44:49 GMT", "version": "v1" } ]
2014-01-14
[ [ "Kurebayashi", "Wataru", "" ], [ "Shirasaka", "Sho", "" ], [ "Nakao", "Hiroya", "" ] ]
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1401.2804
Yunjin Chen
Yunjin Chen, Ren\'e Ranftl and Thomas Pock
Insights into analysis operator learning: From patch-based sparse models to higher-order MRFs
13 pages, 10 figures, accepted to IEEE Image Processing
null
10.1109/TIP.2014.2299065
null
cs.CV
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
This paper addresses a new learning algorithm for the recently introduced co-sparse analysis model. First, we give new insights into the co-sparse analysis model by establishing connections to filter-based MRF models, such as the Field of Experts (FoE) model of Roth and Black. For training, we introduce a technique called bi-level optimization to learn the analysis operators. Compared to existing analysis operator learning approaches, our training procedure has the advantage that it is unconstrained with respect to the analysis operator. We investigate the effect of different aspects of the co-sparse analysis model and show that the sparsity promoting function (also called penalty function) is the most important factor in the model. In order to demonstrate the effectiveness of our training approach, we apply our trained models to various classical image restoration problems. Numerical experiments show that our trained models clearly outperform existing analysis operator learning approaches and are on par with state-of-the-art image denoising algorithms. Our approach develops a framework that is intuitive to understand and easy to implement.
[ { "created": "Mon, 13 Jan 2014 12:10:19 GMT", "version": "v1" } ]
2014-01-14
[ [ "Chen", "Yunjin", "" ], [ "Ranftl", "René", "" ], [ "Pock", "Thomas", "" ] ]
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1401.2811
Frantisek Slanina
Jan Geryk, Frantisek Slanina
Modules in the metabolic network of E.coli with regulatory interactions
null
Int. J. Data Mining and Bioinformatics, Vol. 8, No. 2, 2013, pages 188-202
10.1504/IJDMB.2013.055500
null
q-bio.MN physics.bio-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We examine the modular structure of the metabolic network when combined with the regulatory network representing direct regulation of enzymes by small metabolites in E.coli. In order to identify the modular structure we introduce clustering algorithm based on a novel vertex similarity measure for bipartite graphs. We also apply a standard module identification method based on simulated annealing. Both methods identify the same modular core each of them with different resolution. We observe slight but still statistically significant increase of modularity after regulatory interactions addition. Enrichment of the metabolic network with the regulatory information leads to identification of new functional modules, which cannot be detected in the metabolic network only. Regulatory loops in the modules are the source of their self-control, i.e. autonomy, and allow to make hypothesis about module function. This study demonstrates that incorporation of regulatory information is important component in defining functional units of the metabolic network.
[ { "created": "Mon, 13 Jan 2014 12:24:43 GMT", "version": "v1" } ]
2014-01-14
[ [ "Geryk", "Jan", "" ], [ "Slanina", "Frantisek", "" ] ]
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1401.2814
Anne Stockem
A. Stockem, F. Fiuza, A. Bret, R.A. Fonseca, L.O. Silva
Exploring the nature of collisionless shocks under laboratory conditions
null
null
null
null
physics.plasm-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Collisionless shocks are pervasive in astrophysics and they are critical to understand cosmic ray acceleration. Laboratory experiments with intense lasers are now opening the way to explore and characterise the underlying microphysics, which determine the acceleration process of collisionless shocks. We determine the shock character - electrostatic or electromagnetic - based on the stability of electrostatic shocks to transverse electromagnetic fluctuations as a function of the electron temperature and flow velocity of the plasma components, and we compare the analytical model with particle-in-cell simulations. By making the connection with the laser parameters driving the plasma flows, we demonstrate that shocks with different and distinct underlying microphysics can be explored in the laboratory with state-of-the-art laser systems.
[ { "created": "Mon, 13 Jan 2014 12:33:43 GMT", "version": "v1" } ]
2014-01-14
[ [ "Stockem", "A.", "" ], [ "Fiuza", "F.", "" ], [ "Bret", "A.", "" ], [ "Fonseca", "R. A.", "" ], [ "Silva", "L. O.", "" ] ]
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1401.2815
Lijun Sun Mr
Lijun Sun, Kay W. Axhausen, Der-Horng Lee, Manuel Cebrian
Efficient detection of contagious outbreaks in massive metropolitan encounter networks
4 figures
Sci. Rep. 4, 5099 (2014)
10.1038/srep05099
null
physics.soc-ph cs.SI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Physical contact remains difficult to trace in large metropolitan networks, though it is a key vehicle for the transmission of contagious outbreaks. Co-presence encounters during daily transit use provide us with a city-scale time-resolved physical contact network, consisting of 1 billion contacts among 3 million transit users. Here, we study the advantage that knowledge of such co-presence structures may provide for early detection of contagious outbreaks. We first examine the "friend sensor" scheme --- a simple, but universal strategy requiring only local information --- and demonstrate that it provides significant early detection of simulated outbreaks. Taking advantage of the full network structure, we then identify advanced "global sensor sets", obtaining substantial early warning times savings over the friends sensor scheme. Individuals with highest number of encounters are the most efficient sensors, with performance comparable to individuals with the highest travel frequency, exploratory behavior and structural centrality. An efficiency balance emerges when testing the dependency on sensor size and evaluating sensor reliability; we find that substantial and reliable lead-time could be attained by monitoring only 0.01% of the population with the highest degree.
[ { "created": "Mon, 13 Jan 2014 12:34:19 GMT", "version": "v1" }, { "created": "Mon, 19 May 2014 14:24:20 GMT", "version": "v2" } ]
2014-05-20
[ [ "Sun", "Lijun", "" ], [ "Axhausen", "Kay W.", "" ], [ "Lee", "Der-Horng", "" ], [ "Cebrian", "Manuel", "" ] ]
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1401.2818
Alan Brunton
Alan Brunton, Timo Bolkart, Stefanie Wuhrer
Multilinear Wavelets: A Statistical Shape Space for Human Faces
10 pages, 7 figures; accepted to ECCV 2014
null
null
null
cs.CV cs.GR
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present a statistical model for $3$D human faces in varying expression, which decomposes the surface of the face using a wavelet transform, and learns many localized, decorrelated multilinear models on the resulting coefficients. Using this model we are able to reconstruct faces from noisy and occluded $3$D face scans, and facial motion sequences. Accurate reconstruction of face shape is important for applications such as tele-presence and gaming. The localized and multi-scale nature of our model allows for recovery of fine-scale detail while retaining robustness to severe noise and occlusion, and is computationally efficient and scalable. We validate these properties experimentally on challenging data in the form of static scans and motion sequences. We show that in comparison to a global multilinear model, our model better preserves fine detail and is computationally faster, while in comparison to a localized PCA model, our model better handles variation in expression, is faster, and allows us to fix identity parameters for a given subject.
[ { "created": "Mon, 13 Jan 2014 12:48:39 GMT", "version": "v1" }, { "created": "Tue, 1 Jul 2014 09:26:10 GMT", "version": "v2" } ]
2014-07-02
[ [ "Brunton", "Alan", "" ], [ "Bolkart", "Timo", "" ], [ "Wuhrer", "Stefanie", "" ] ]
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Multilinear Wavelets: A Statistical Shape Space for Human Faces
http://arxiv.org/abs/1401.2818v2
http://arxiv.org/pdf/1401.2818v2.pdf
https://github.com/TimoBolkart/MultilinearWaveletModel
true
false
https://paperswithcode.com/paper/multilinear-wavelets-a-statistical-shape
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1401.2819
Oliver Knill
Oliver Knill
A notion of graph homeomorphism
11 figures, 33 pages
null
null
null
math.GN cs.DM
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We introduce a notion of graph homeomorphisms which uses the concept of dimension and homotopy for graphs. It preserves the dimension of a subbasis, cohomology and Euler characteristic. Connectivity and homotopy look as in classical topology. The Brouwer-Lefshetz fixed point leads to the following discretiszation of the Kakutani fixed point theorem: any graph homeomorphism T with nonzero Lefschetz number has a nontrivial invariant open set which is fixed by T.
[ { "created": "Mon, 13 Jan 2014 12:49:00 GMT", "version": "v1" } ]
2014-01-14
[ [ "Knill", "Oliver", "" ] ]
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1401.2821
Pierre-Philippe Cortet
Eric Herbert, Pierre-Philippe Cortet, Fran\c{c}ois Daviaud, B\'ereng\`ere Dubrulle
Eckhaus-like instability of large scale coherent structures in a fully turbulent von K\'arm\'an flow
null
Physics of Fluids 26, 015103 (2014)
10.1063/1.4855018
null
physics.flu-dyn cond-mat.stat-mech
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The notion of instability of a turbulent flow is introduced in the case of a von K\'arm\'an flow thanks to the monitoring of the spatio-temporal spectrum of the velocity fluctuations, combined with projection onto suitable Beltrami modes. It is shown that the large scale coherent fluctuations of the flow obeys a sequence of Eckhaus instabilities when the Reynolds number $\mathrm{Re}$ is varied from $10^2$ to $10^6$. This sequence results in modulations of increasing azimuthal wavenumber. The basic state is the laminar or time-averaged flow at an arbitrary $\mathrm{Re}$, which is axi-symmetric, i.e. with a $0$ azimuthal wavenumber. Increasing $\mathrm{Re}$ leads to non-axisymmetric modulations with increasing azimuthal wavenumber from $1$ to $3$. These modulations are found to rotate in the azimuthal direction. However no clear rotation frequency can be established until $\mathrm{Re}\approx 4\times 10^3$. Above, they become periodic with an increasing frequency. We finally show that these modulations are connected with the coherent structures of the mixing shear layer. The implication of these findings for the turbulence parametrization is discussed. Especially, they may explain why simple eddy viscosity models are able to capture complex turbulent flow dynamics.
[ { "created": "Mon, 13 Jan 2014 12:54:17 GMT", "version": "v1" } ]
2014-01-14
[ [ "Herbert", "Eric", "" ], [ "Cortet", "Pierre-Philippe", "" ], [ "Daviaud", "François", "" ], [ "Dubrulle", "Bérengère", "" ] ]
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1401.2829
Pavel A. Andreev
Pavel A. Andreev
NLSE for quantum plasmas with the radiation damping
4 pages
Mod. Phys. Lett. B Vol. 30, 1650180 (2016)
10.1142/S0217984916501803
null
physics.plasm-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We consider contribution of the radiation damping in the quantum hydrodynamic equations for spinless particles. We discuss possibility of obtaining of corresponding non-linear Schrodinger equation (NLSE) for the macroscopic wave function. We compare contribution of the radiation damping with weakly (or semi-) relativistic effects appearing in the second order by v/c. The radiation damping appears in the third order by v/c. So it might be smaller than weakly relativistic effects, but it gives damping of the Langmuir waves which can be considerable.
[ { "created": "Mon, 13 Jan 2014 13:22:51 GMT", "version": "v1" } ]
2016-06-10
[ [ "Andreev", "Pavel A.", "" ] ]
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1401.2838
Edward Meeds
Edward Meeds and Max Welling
GPS-ABC: Gaussian Process Surrogate Approximate Bayesian Computation
null
null
null
null
cs.LG q-bio.QM stat.ML
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Scientists often express their understanding of the world through a computationally demanding simulation program. Analyzing the posterior distribution of the parameters given observations (the inverse problem) can be extremely challenging. The Approximate Bayesian Computation (ABC) framework is the standard statistical tool to handle these likelihood free problems, but they require a very large number of simulations. In this work we develop two new ABC sampling algorithms that significantly reduce the number of simulations necessary for posterior inference. Both algorithms use confidence estimates for the accept probability in the Metropolis Hastings step to adaptively choose the number of necessary simulations. Our GPS-ABC algorithm stores the information obtained from every simulation in a Gaussian process which acts as a surrogate function for the simulated statistics. Experiments on a challenging realistic biological problem illustrate the potential of these algorithms.
[ { "created": "Mon, 13 Jan 2014 14:02:37 GMT", "version": "v1" } ]
2014-01-14
[ [ "Meeds", "Edward", "" ], [ "Welling", "Max", "" ] ]
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1401.2840
Jerome Kasparian
Nicolas Berti and Wahb Ettoumi and J\'er\^ome Kasparian and Jean-Pierre Wolf
Reversibility of laser filamentation
12 pages, 3 figures
Optics Express 22, 21051 (2014)
10.1364/OE.22.021061
null
physics.optics nlin.CD
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We investigate the reversibility of laser filamentation, a self-sustained, non-linear propagation regime including dissipation and time-retarded effects. We show that even losses related to ionization marginally affect the possibility of reverse propagating ultrashort pulses back to the initial conditions, although they make it prone to finite-distance blow-up susceptible to prevent backward propagation.
[ { "created": "Mon, 13 Jan 2014 14:07:10 GMT", "version": "v1" }, { "created": "Mon, 14 Apr 2014 12:00:26 GMT", "version": "v2" }, { "created": "Tue, 1 Jul 2014 20:59:40 GMT", "version": "v3" }, { "created": "Wed, 3 Sep 2014 07:23:38 GMT", "version": "v4" } ]
2014-09-04
[ [ "Berti", "Nicolas", "" ], [ "Ettoumi", "Wahb", "" ], [ "Kasparian", "Jérôme", "" ], [ "Wolf", "Jean-Pierre", "" ] ]
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1401.2844
Dmitry Lande
Yakiv O. Kalinovsky, Dmitry V. Lande, Yuliya E. Boyarinova, Iana V. Khitsko
Inifnite hypercomplex number system factorization methods
6 pages
null
null
null
cs.NA cs.DS
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The method of obtaining the set of noncanonical hypercomplex number systems by conversion of infinite hypercomplex number system to finite hypercomplex number system depending on multiplication rules and factorization method is described. Systems obtained by this method starting from the 3rddimension are noncanonical. The obtained systems of even dimension can be re-factorized. As a result of it hypercomplex number system of two times less dimension are got.
[ { "created": "Mon, 13 Jan 2014 14:22:32 GMT", "version": "v1" } ]
2014-01-14
[ [ "Kalinovsky", "Yakiv O.", "" ], [ "Lande", "Dmitry V.", "" ], [ "Boyarinova", "Yuliya E.", "" ], [ "Khitsko", "Iana V.", "" ] ]
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1401.2845
Ran Zheng Professor
Zheng Ran
A new class of exact solution of two-dimensional incompressible vortex motion
6 pages, 0 figure
null
null
null
physics.flu-dyn
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
At present in the fluid mechanics, mostly one like to use the vortex as a basic physical quantity, such that some exact solutions is based on the vorticity evolution equation. For the vortex flow problem with axisymmetry, it is well known that there exists in the circulation as a mechanical system of basic physical quantities. In this paper, from the basic dynamic equation of the mechanical system, the self-similar solution, eigenvalue system into a self- consistent, new exact solutions of the two-dimensional circular symmetric vortex flow are obtained, and some further comparison are made with the known exact solutions. Key words: vortex motion, exact solution, eigenvalue system
[ { "created": "Mon, 13 Jan 2014 14:26:11 GMT", "version": "v1" }, { "created": "Tue, 14 Jan 2014 08:11:08 GMT", "version": "v2" } ]
2014-01-15
[ [ "Ran", "Zheng", "" ] ]
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1401.2851
Md. Naseef-Ur-Rahman Chowdhury
Md. Naseef-Ur-Rahman Chowdhury, Suvankar Paul, and Kazi Zakia Sultana
Statistical Analysis based Hypothesis Testing Method in Biological Knowledge Discovery
9 pages, published on International Journal on Computational Sciences & Applications (IJCSA) Vol.3, No.6, December 2013
null
null
null
cs.IR cs.CL
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The correlation and interactions among different biological entities comprise the biological system. Although already revealed interactions contribute to the understanding of different existing systems, researchers face many questions everyday regarding inter-relationships among entities. Their queries have potential role in exploring new relations which may open up a new area of investigation. In this paper, we introduce a text mining based method for answering the biological queries in terms of statistical computation such that researchers can come up with new knowledge discovery. It facilitates user to submit their query in natural linguistic form which can be treated as hypothesis. Our proposed approach analyzes the hypothesis and measures the p-value of the hypothesis with respect to the existing literature. Based on the measured value, the system either accepts or rejects the hypothesis from statistical point of view. Moreover, even it does not find any direct relationship among the entities of the hypothesis, it presents a network to give an integral overview of all the entities through which the entities might be related. This is also congenial for the researchers to widen their view and thus think of new hypothesis for further investigation. It assists researcher to get a quantitative evaluation of their assumptions such that they can reach a logical conclusion and thus aids in relevant re-searches of biological knowledge discovery. The system also provides the researchers a graphical interactive interface to submit their hypothesis for assessment in a more convenient way.
[ { "created": "Thu, 9 Jan 2014 18:05:15 GMT", "version": "v1" } ]
2014-01-14
[ [ "Chowdhury", "Md. Naseef-Ur-Rahman", "" ], [ "Paul", "Suvankar", "" ], [ "Sultana", "Kazi Zakia", "" ] ]
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1401.2853
Chayan Sarkar
Chayan Sarkar, Vijay S. Rao, R. Venkatesha Prasad
Technical Report: Sleep-Route - Routing through Sleeping Sensors
null
null
10.1109/MASS.2014.54
null
cs.NI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this article, we propose an energy-efficient data gathering scheme for wireless sensor network called Sleep-Route, which splits the sensor nodes into two sets - active and dormant (low-power sleep). Only the active set of sensor nodes participate in data collection. The sensing values of the dormant sensor nodes are predicted with the help of an active sensor node. Virtual Sensing Framework (VSF) provides the mechanism to predict the sensing values by exploiting the data correlation among the sensor nodes. If the number of active sensor nodes can be minimized, a lot of energy can be saved. The active nodes' selection must fulfill the following constraints - (i) the set of active nodes are sufficient to predict the sensing values of the dormant nodes, (ii) each active sensor nodes can report their data to the sink node (directly or through some other active node(s)). The goal is to select a minimal number of active sensor nodes so that energy savings can be maximized. The optimal set of active node selection raise a combinatorial optimization problem, which we refer as Sleep-Route problem. We show that Sleep-Route problem is NP-hard. Then, we formulate an integer linear program (ILP) to solve the problem optimally. To solve the problem in polynomial time, we also propose a heuristic algorithm that performs near optimally.
[ { "created": "Mon, 13 Jan 2014 14:42:23 GMT", "version": "v1" }, { "created": "Mon, 27 Jan 2014 10:31:46 GMT", "version": "v2" }, { "created": "Fri, 12 Aug 2016 04:29:57 GMT", "version": "v3" } ]
2016-08-15
[ [ "Sarkar", "Chayan", "" ], [ "Rao", "Vijay S.", "" ], [ "Prasad", "R. Venkatesha", "" ] ]
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1401.2854
Lucca Hirschi
David Baelde, St\'ephanie Delaune and Lucca Hirschi
A reduced semantics for deciding trace equivalence using constraint systems
Accepted for publication at POST'14
null
10.1007/978-3-642-54792-8_1
null
cs.CR cs.LO
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Many privacy-type properties of security protocols can be modelled using trace equivalence properties in suitable process algebras. It has been shown that such properties can be decided for interesting classes of finite processes (i.e., without replication) by means of symbolic execution and constraint solving. However, this does not suffice to obtain practical tools. Current prototypes suffer from a classical combinatorial explosion problem caused by the exploration of many interleavings in the behaviour of processes. M\"odersheim et al. have tackled this problem for reachability properties using partial order reduction techniques. We revisit their work, generalize it and adapt it for equivalence checking. We obtain an optimization in the form of a reduced symbolic semantics that eliminates redundant interleavings on the fly.
[ { "created": "Mon, 13 Jan 2014 14:45:34 GMT", "version": "v1" }, { "created": "Fri, 17 Jan 2014 15:22:28 GMT", "version": "v2" } ]
2016-10-27
[ [ "Baelde", "David", "" ], [ "Delaune", "Stéphanie", "" ], [ "Hirschi", "Lucca", "" ] ]
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1401.2858
Valentina Krachmalnicoff
D. Cao, A. Caz\'e, M. Calabrese, R. Pierrat, N. Bardou, S. Collin, R. Carminati, V. Krachmalnicoff and Y. De Wilde
Mapping the radiative and the apparent non-radiative local density of states in the near field of a metallic nanoantenna
5 pages, 3 figures, submitted on Jan 7, 2014
null
10.1021/ph500431g
null
physics.optics
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present a novel method to extract the various contributions to the photonic local density of states from near-field fluorescence maps. The approach is based on the simultaneous mapping of the fluorescence intensity and decay rate, and on the rigorous application of the reciprocity theorem. It allows us to separate the contributions of the radiative and the apparent non-radiative local density of states to the change in the decay rate. The apparent non-radiative contribution accounts for losses due to radiation out of the detection solid angle and to absorption in the environment. Data analysis relies on a new analytical calculation, and does not require the use of numerical simulations. One of the most relevant applications of the method is the characterization of nanostructures aimed at maximizing the number of photons emitted in the detection solid angle, which is a crucial issue in modern nanophotonics.
[ { "created": "Mon, 13 Jan 2014 15:00:43 GMT", "version": "v1" }, { "created": "Thu, 6 Nov 2014 11:27:39 GMT", "version": "v2" } ]
2021-08-04
[ [ "Cao", "D.", "" ], [ "Cazé", "A.", "" ], [ "Calabrese", "M.", "" ], [ "Pierrat", "R.", "" ], [ "Bardou", "N.", "" ], [ "Collin", "S.", "" ], [ "Carminati", "R.", "" ], [ "Krachmalnicoff", "V.", "" ], [ "De Wilde", "Y.", "" ] ]
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1401.2860
Frantisek Slanina
Frantisek Slanina
Complex temporal structure of activity in on-line electronic auctions
null
Advances in Complex Systems Vol. 15, (2012) 1250053
10.1142/S0219525912500531
null
q-fin.ST physics.soc-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We analyze empirical data from the internet auction site Aukro.cz. The time series of activity shows truncated fractal structure on scales from about 1 minute to about 1 day. The distribution of waiting times as well as the distribution of number of auctions within fixed interval is a power law, with exponents $1.5$ and $3$, respectively. Possible implications for the modeling of stock-market fluctuations are briefly discussed.
[ { "created": "Mon, 13 Jan 2014 15:06:06 GMT", "version": "v1" } ]
2014-01-14
[ [ "Slanina", "Frantisek", "" ] ]
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1401.2861
Arno Pauly
Akitoshi Kawamura and Arno Pauly
Function spaces for second-order polynomial time
null
null
null
null
cs.CC cs.LO math.LO
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In the context of second-order polynomial-time computability, we prove that there is no general function space construction. We proceed to identify restrictions on the domain or the codomain that do provide a function space with polynomial-time function evaluation containing all polynomial-time computable functions of that type. As side results we show that a polynomial-time counterpart to admissibility of a representation is not a suitable criterion for natural representations, and that the Weihrauch degrees embed into the polynomial-time Weihrauch degrees.
[ { "created": "Mon, 13 Jan 2014 15:08:05 GMT", "version": "v1" }, { "created": "Tue, 27 Oct 2015 10:42:25 GMT", "version": "v2" } ]
2015-10-28
[ [ "Kawamura", "Akitoshi", "" ], [ "Pauly", "Arno", "" ] ]
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1401.2862
Tobias Baier
Tobias Baier, Julia D\"olger and Steffen Hardt
Energy harvesting through gas dynamics in the free molecular flow regime between structured surfaces at different temperatures
null
Phys. Rev. E 89, 053003 (2014)
10.1103/PhysRevE.89.053003
null
physics.flu-dyn
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
For a gas confined between surfaces held at different temperatures the velocity distribution shows a significant deviation from the Maxwell distribution when the mean free path of the molecules is comparable to or larger than the channel dimensions. If one of the surfaces is suitably structured, this non-equilibrium distribution can be exploited for momentum transfer in tangential direction between the two surfaces. This opens up the possibility to extract work from the system which operates as a heat engine. Since both surfaces are held at constant temperatures, the mode of momentum transfer is different from thermal creep flow that has gained more attention so far. This situation is studied in the limit of free-molecular flow for the case that an unstructured surface is allowed to move tangentially with respect to a structured surface. Parameter studies are conducted, and configurations with maximum thermodynamic efficiency are identified. Overall, it is shown that significant efficiencies can be obtained by tangential momentum transfer between structured surfaces.
[ { "created": "Mon, 13 Jan 2014 15:08:49 GMT", "version": "v1" }, { "created": "Tue, 6 May 2014 14:55:43 GMT", "version": "v2" } ]
2014-05-07
[ [ "Baier", "Tobias", "" ], [ "Dölger", "Julia", "" ], [ "Hardt", "Steffen", "" ] ]
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