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|---|---|---|---|---|
Pet therapy: an effective strategy to care for the elderly? An experimental study in a nursing home.
|
animal - assisted intervention in dementia : effects on quality of life .
|
Parallel Convolutional Networks for Image Recognition via a Discriminator
|
eng_Latn
| 136,862 |
Multilayer Hybrid Deep-Learning Method for Waste Classification and Recycling
|
A Computer Vision System to Localize and Classify Wastes on the Streets
|
The central role of trunk control in the gross motor function of children with cerebral palsy: a retrospective cross-sectional study
|
eng_Latn
| 136,879 |
Unsupervised Adversarial Depth Estimation Using Cycled Generative Networks
|
Unsupervised CNN for Single View Depth Estimation: Geometry to the Rescue
|
An assessment form for clinical nursing education: a Delphi study.
|
eng_Latn
| 136,896 |
Brain MRI segmentation with patch-based CNN approach
|
Notes on Convolutional Neural Networks
|
Sonography of the superomedial part of the spring ligament complex of the foot: a study of cadavers and asymptomatic volunteers
|
eng_Latn
| 136,937 |
Predicting Alzheimer's disease: a neuroimaging study with 3D convolutional neural networks
|
What is the best multi-stage architecture for object recognition?
|
The Alzheimer's Disease Neuroimaging Initiative (ADNI): MRI methods.
|
eng_Latn
| 136,938 |
Learning Localized Geometric Features Using 3D-CNN: An Application to Manufacturability Analysis of Drilled Holes
|
Predicting Alzheimer's disease: a neuroimaging study with 3D convolutional neural networks
|
Delving Deep into Rectifiers: Surpassing Human-Level Performance on ImageNet Classification
|
eng_Latn
| 137,061 |
Aircraft Fuselage Defect Detection using Deep Neural Networks
|
Image-based vehicle analysis using deep neural network: A systematic study
|
the pathogenesis of kirner ' s deformity : a clinical , radiological and histological study .
|
eng_Latn
| 137,162 |
A Novel Approach for Learning How to Automatically Match Job Offers and Candidate Profiles
|
Top-k Matching Queries for Filter-Based Profile Matching in Knowledge Bases
|
A study on brain tumor segmentation using convolution neural network
|
eng_Latn
| 137,202 |
Predicting Alzheimer's disease: a neuroimaging study with 3D convolutional neural networks
|
What is the best multi-stage architecture for object recognition?
|
Deep adversarial neural decoding
|
eng_Latn
| 137,215 |
Deep convolutional Triplet network for quantitative medical image analysis with comparative case study of gamma image classification
|
FaceNet: A Unified Embedding for Face Recognition and Clustering
|
Detecting the Optic Disc Boundary in Digital Fundus Images Using Morphological, Edge Detection, and Feature Extraction Techniques
|
eng_Latn
| 137,232 |
Mental Disease Feature Extraction with MRI by 3D Convolutional Neural Network with Multi-channel Input
|
Deep learning for neuroimaging: a validation study
|
Vision-Based Traffic Sign Detection and Analysis for Intelligent Driver Assistance Systems: Perspectives and Survey
|
eng_Latn
| 137,289 |
Dynamic Multimodal Instance Segmentation guided by natural language queries
|
Densely Connected Convolutional Networks
|
p53 and c-kit (CD117) protein expression as prognostic indicators in breast phyllodes tumors: a tissue microarray study
|
eng_Latn
| 137,344 |
Deep Recurrent and Convolutional Neural Networks for Automated Behavior Classification
|
ImageNet Large Scale Visual Recognition Challenge
|
The long-term outcome of patients diagnosed with sacrococcygeal teratoma in childhood. A study of a national cohort.
|
eng_Latn
| 137,361 |
Due to the co-existence of optical activity and linear birefringence in a Bi 12 SiO 20 crystal, a phase gratting induced in this medium has many interesting and unusual properties. We study the ellipticity and orientation of the directly transmitted and diffracted beams as a function of the read-beam vector orientation. In image processing experiments the signal to noise ratio can be increased significantly by appropriately choosing the read-beam orientation such that the strong direct beam is linearly polarized and can be eliminated with the help of a polarizer.
|
We demonstrate experimentally two regimes of an enhanced beam amplification in photorefractive waveguide. Enhancement is achieved by matching the optical activity and the reflections of the beams in waveguide. Beam amplification is assisted by stimulated photorefractive scattering.
|
We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero.
|
eng_Latn
| 137,369 |
Mechanism of Three-dimension Sensing with Fiber Gratings for Structure Cracks Detection
|
Finite element analysis-based study of fiber Bragg grating sensor for cracks detection in reinforced concrete
|
Review of Applications for Fiber Bragg Grating Sensors
|
eng_Latn
| 137,380 |
Programmable fiber Bragg gratings for spectral CDMA
|
Higher-order dispersion mitigation for spectrum-sliced FFH-OCDMA using adaptive prime-hop codes
|
Finite element analysis-based study of fiber Bragg grating sensor for cracks detection in reinforced concrete
|
eng_Latn
| 137,382 |
Determination of the Spectral Dispersion Curves of Highly Oriented Fibers Using Multiple-Beam Microinterferometry
|
A method is suggested with its mathematical analysis to determine the spectral dispersion curves of highly oriented fibers using multiple-beam Fizeau fringes in transmission. This method depends on the use of the well-known Caushy's dispersion formula for determining the initial interference order of the deviated fringes inside the fibers. The suggested method overcomes the difficulties of measuring large optical path length differences that are produced by highly oriented fibers. The spectral dispersion curves obtained using this method are in good agreement with those obtained using conventional variable wavelength interferometry (VAWI) technique. Microinterferograms are given for illustration.
|
Study Design.A meta-analysis.Objective.The aim of this study was to compare the diagnostic accuracies of F-18 fluorodeoxyglucose (F-18 FDG) positron emission tomography (PET) and magnetic resonance imaging (MRI) for the detection of spondylodiscitis through a meta-analysis.Summary of Background Data
|
eng_Latn
| 137,482 |
Refractive Index Insensitive Temperature Sensor Based on an Optical Fiber Interferometer
|
In this work we present an in-line fiber-optics sensor for temperature measurements. The sensing probe is a single-mode/single-mode (SM-SM) fiber configuration formed by splicing two sections of SM fibers with a lateral offset, the sensing probe is coated by the sputtering technique using gold. The measurement of the temperature is carried out by monitoring the shift of the interference pattern. This sensor configuration exhibits insensitivity to changes in the refractive index of the external medium, which broadens the range of environments in which the sensor can measure. The temperature sensitivity obtained for this configuration was 5380 nm/°C.
|
OBJECTIVE ::: To establish a new method to discriminate Aaron's beard by Fourier transformation infrared spectrometry. ::: ::: ::: METHODS ::: Attenuation Reflection-Fourier transformation infrared spectrometry with clustering analysis was used to the identification of Aaron's beard. ::: ::: ::: RESULTS ::: There were obvious differences in Aaron's beard. The results are consistent with that of morphologic study. ::: ::: ::: CONCLUSION ::: This method is rapid, simple and economical, and can be used to the quality control.
|
eng_Latn
| 137,484 |
A new spectral calibration method for Fourier domain optical coherence tomography
|
Abstract Spectral calibration is important for a Fourier domain optical coherence tomography (FD-OCT) system. A new spectral calibration method for FD-OCT is presented. Through the iterated mapping of spectral interferograms detected by an optical spectrum analyzer and the CCD grating spectrometer, multiple groups of calibration coefficients are obtained. By comparing the effects of these coefficients on improving the amplitude of the axial point spread function (PSF), optimum coefficients are obtained. In this method, no additional calibration laser source is needed, reducing the complexity of the system. The cross-sectional images of a glass plate in milk are acquired, and the experimental results indicate that the axial resolution and signal-to-noise ratio (SNR) are effectively improved with the proposed spectral calibration method.
|
By differential operator,this paper study the method for solving a class of the fourth order linear differential equations and the stability of its solution,make the extension to results of paper[2].
|
eng_Latn
| 137,494 |
Low-coherence interferometry in random media. II. Experiment.
|
We present experimental results of measurements of light backscattering from semi-infinite disordered media by low-coherence interferometry (LCI). These results are compared with the theory developed in part I [J. Opt. Soc. Am. A 17, 2024 (2000)]. A comparison of the experimental data with the theoretical formulas based on the coherent phase approximation allows us to extract substantial information about the structure of the studied media. Our results demonstrate that LCI is an effective optical technique for studying nonuniform media even in the case in which the dimensions of nonuniformities are much less than the wavelength of the scattered light.
|
The basic argument underlying the present approach is again that the qualitative nature of the observations from business surveys is just the consequence of how the survey is conducted. Indeed, the categorical responses are assumed to be initiated by some latent continuous variables. Now, the correlations among these variables can be estimated by the method of the polychoric correlation coefficient exposed in Chapter 3. Then, we may ask the following question: Using correlations between predictions and realizations estimated from business survey data, could we test on the latent variables, the necessary and sufficient condition for rational expectations?
|
eng_Latn
| 137,496 |
An optical lattice with single lattice site optical control for quantum engineering
|
We resolve and address atoms in single sites of an optical lattice with a period of 5.3 µm created by a retroreflected, focused CO2 laser beam. In this one-dimensional lattice, the Lamb-Dicke limit can be fulfilled in all three spatial dimensions. Because of the negligible decoherence rate from spontaneous photon scattering such a lattice offers unique possibilities for the study of quantum phenomena in a controllable environment.
|
Special features of speckle-modulated laser fields arising at in vitro measurements of different types of human cataractous lenses have been investigated experimentally. Computer analysis of digital images has allowed for estimation of destruction of the spatial coherence of a laser beam scattered by a turbid lens. Applied speckle-technologies have permitted the range of retinal angular resolution to be estimated with the help of laser retinometer at the stage of preoperative cataract diagnosis. An extent of laser retinometry at measuring visual acu9ity in patients with any type of cataract, and an incorrectness of its estimation by means of opto types charts have been set up.
|
eng_Latn
| 137,509 |
The Extracting Techniques of Trehalose from Lichen
|
There are abundant lichen resources in China,most of which in this genera are wild.The major topic focused here is about Lichen,and the extracting techniques of trehalose from Lichen.And a quantitative analysis is carried out and the result shows that the best plan is 50% ethanol,pH 10,80℃,extraction time 4.5 hours.The quantity of Trehalose extracted from lichen is 1.153% of the total amount of lichen.
|
This paper describes the use of a thermochromic material (2,4,5-triphenylimidazole or also called Lophine) for the fabrication of temperature optical fiber sensors. First, an experimental study of this material at different temperatures is presented and subsequently its behavior in two different schemes (variations of the reflected optical power and of the transmitted optical power) is analyzed. The characterization of both low cost sensors is discussed comparing the experimental results and analyzing their advantages and disadvantages. Besides, all the measurements taken were immune to humidity obtaining ideal sensors for monitoring the temperature of the water in several applications.
|
eng_Latn
| 137,519 |
A Raman spectral investigation of structural variations in thin silicate glass fibers
|
Raman spectroscopy has been used to characterize the structure of glass fibers with diameters as small as 3 μm. A special sample holder, which enables the laser beam to strike the transverse surface of the fiber bundles and to probe structural variations along the longitudinal direction, was designed. Structural variations in multi-component silicate glass fibers were studied as a function of fiber drawing conditions and different annealing temperatures.
|
A finite 3D element model coupled with a 2D finite volume one has been developed obatained in order to study the miscrostruture evolution during the desification of a green compact obtained by powder metturgy [1]. The simulation of the process was performed on to grains considering surface diffusion of the grains, grain boundary diffusion and volume diffusion in the grains, with as source terms the radii of curvature. The stress gradients are the driving forces of sintering. The mechanical behaviour of the grains is considered as elastic in the whole temperature range of the sintering cycle.
|
eng_Latn
| 137,532 |
Spatial Period-Doubling Instability of Dendritic Arrays in Directional Solidification.
|
A directional solidification study of succinonitrile doped with coumarin 152 was performed in which the pulling speed {ital V}{sub {ital P}} was gradually reduced in small steps. A spatial period-doubling instability was observed when {ital V}{sub {ital P}} reached 17.4 {mu}m/s, in good quantitative agreement with the prediction of Warren and Langer [Phys. Rev. A {bold 42}, 3518 (1990)]. This experiment, in conjunction with two previous studies, conclusively demonstrates the absence of a dynamical selection mechanism for the interdendritic spacing {lambda}{sub 1}. {copyright} {ital 1996 The American Physical Society.}
|
Abstract Techniques for recording and analysing fibre diffraction data from DNA using the instrument D19 at the Institut Laue-Langevin Reactor Source and the instrument SXD at the Rutherford Appleton Laboratory ISIS Spallation Source are described and compared. Data recorded from a specially prepared sample of deuterated DNA in the A conformation using SXD are compared with previously analysed data from a normally hydrogenated DNA in the same conformation recorded on D19. A preliminary Fourier difference analysis of these two datasets has allowed their consistency to be established.
|
eng_Latn
| 137,542 |
Adsorption-Thermal Desorption-Gas Chromatography Applied to the Determination of Wine Aromas
|
Headspace techniques have been frequently used to study volatile components in foods. These techniques are nondestructive and, since headspace chemical composition is quite similar to that of food aromas detected by the human nose, a correlation can be established between chemical and sensorial analyses.
|
A theoretical model for computer simulation of spectral distortions in Wavelength Division Multiplexed (WDM) fiber optic systems due to Stimulated Raman Scattering (SRS) and wavelength dependent linear loss coefficient in optical fibers has been developed and suggested in this paper. The results are compared with the experimental results [1] and are found in excellent agreement. Using this model a spectral inversion method (SIM) is devised for evaluating optical powers to be launched at different wavelength channels in WDM fiber optic systems for minimising the spectral distortions due to SRS and wavelength dependent linear loss coefficient of optical fiber. The results are compared with the already suggested linear approximation method [2]. Some limitations of linear approximation method are removed in this spectral inversion method.
|
kor_Hang
| 137,549 |
Temperature character of PZT fiber optic phase modulator
|
The mathematical representation of modulation coefficient and intrinsic phase delay of PZT fiber-optic phase modulator are given. To study the temperature character, this paper design two measure system with a Mach-Zehnder and a Sagnac interferometer and get the experimental result curve which show that both parameters are linear with temperature approximately in set temperature range.
|
The intensity variation of [SIII] 9531 A line emission from the hot plasma torus of Jupiter was measured from Kitt Peak National Observatory during April 1982 using a scanning Fabry-Perot spectrometer with a field of view 2 RJ in diameter centered at 6 RJ on the centrifugal equator. During the observational period, which covered 43 rotations of Jupiter, the intensities showed a periodic variation consistent with a zone of enhanced emission approximately 90° in longitude rotating with a period of 10.2 hours, or 2.8% longer than Jupiter' rotational period.
|
eng_Latn
| 137,556 |
Taper-assisted polarisation compensation in efficiently fibre-coupled InP demultiplexer
|
A 8/spl times/2 nm polarisation independent InP-based demultiplexer operating at /spl sim/1.54 /spl mu/m with a low birefringence wide input waveguide has been produced by incorporating polarisation dispersion compensation into a highly birefringent waveguide. Mode converters were used in each arm of the grating to avoid transition losses. The fibre-waveguide insertion loss is 0.5 dB and, misalignment tolerance (at -1 dB) is 2.5 /spl mu/m. Crosstalk is as low as -30 dB.
|
We present what is to our knowledge the most complete 1-D numerical analysis of the evolution and the propagation ::: dynamics of an ultrashort laser pulse in a Ti:Sapphire laser oscillator. This study confirms the dispersion ::: managed model of mode-locking, and emphasizes the role of the Kerr nonlinearity in generating mode-locked ::: spectra with a smooth and well-behaved spectral phase. A very good agreement with experimental measurements ::: of pulse energy, spectrum, and temporal width of extracavity compressed pulses is found.
|
eng_Latn
| 137,564 |
Sib-pair linkage analysis of alcohol dependence taking into account covariates and age-of-onset variability: Evaluation of the residual approach
|
The construction of residuals allowed us to consider a phenotype related to alcohol dependence (ALDX1) adjusted for age, gender and current smoking status. Using the Haseman and Elston regression test, we compared genome scan results for detection of loci for the unadjusted and adjusted ALDX1 phenotypes in the Collaborative Study on the Genetics of Alcoholism (COGA) data. More markers were significant at the 1% level for the binary than for the residual analyses. Overall, our residual analyses do not show substantial improvement in their ability to detect linkage for alcohol dependence in the COGA data. This may be due to the relatively small sample size of discordant sib pairs.
|
A large increase has been shown in the number of cyberbullying cases among school students for the past decades. The rates of cyberbullying have increased due to the extensive use of mobile devices among the students. Thus, it is important to identify the factors of cyberbullying in order to address the issues appropriately. The aim of this research is to assess the association of cyberbullying victim with demographic profiles. This study focuses on different types of secondary school in Malaysia. A quantitative method was adopted in this study using survey questionnaires. Chi square test was used to test the association of cyberbullying victim with demographic profiles. Logistic Regression was used to determine the significant factors that contribute to the cyberbullying victim. The results indicate that the type of schools has significant impact to cyberbullying.
|
eng_Latn
| 137,608 |
Sneak into Devil's Colony- A study of Fake Profiles in Online Social Networks and the Cyber Law
|
People are Strange when you're a Stranger: Impact and Influence of Bots on Social Networks
|
Wideband and low-profile end-fire antennas mountable on metallic platforms
|
eng_Latn
| 137,632 |
design and analysis of enumeration attacks on finding friends with phone numbers : a case study with kakaotalk .
|
You are How You Click : Clickstream Analysis for Sybil Detection
|
vowels , consonants , and lexical tones : sensitivity to phonological variation in monolingual mandarin and bilingual english - mandarin toddlers .
|
eng_Latn
| 137,643 |
Character usage in Chinese short message service SMS: a real-world study in Mainland China
|
Chat mining : Predicting user and message attributes in computer-mediated communication
|
Bayesian stackelberg games and their application for security at Los Angeles international airport
|
eng_Latn
| 137,657 |
A study of link farm distribution and evolution using a time series of web snapshots
|
Trawling the Web for emerging cyber-communities
|
Coalitions Among Computationally Bounded Agents
|
eng_Latn
| 137,668 |
Keeping up with the jammers: Observe-and-adapt algorithms for studying mutually adaptive opponents
|
Extreme learning machine: Theory and applications
|
nber working paper series taxing hidden wealth : the consequences of u . s . enforcement initiatives on evasive foreign accounts .
|
eng_Latn
| 137,671 |
Using computer technology to address the problem of cyberbullying
|
Psychosocial risk factors associated with cyberbullying among adolescents: a population-based study.
|
Text categorization with support vector machines: Learning with many relevant features
|
eng_Latn
| 137,673 |
Filtering spam with behavioral blacklisting
|
On clusterings-good, bad and spectral
|
Code-Red: a case study on the spread and victims of an internet worm
|
eng_Latn
| 137,676 |
A new approach to bot detection: Striking the balance between precision and recall
|
Seven months with the devils: a long-term study of content polluters on Twitter
|
A Closer Look at Amphetamine-Induced Reverse Transport and Trafficking of the Dopamine and Norepinephrine Transporters
|
eng_Latn
| 137,704 |
Global aetiology and epidemiology of type 2 diabetes mellitus and its complications
|
A metagenome-wide association study of gut microbiota in type 2 diabetes
|
Weakly Supervised Cyberbullying Detection Using Co-Trained Ensembles of Embedding Models
|
eng_Latn
| 137,717 |
A study into the believability of animated characters in the context of bullying intervention
|
Embodied conversational agents as a ui paradigm: A framework for evaluation
|
Visual Analysis of Time-Series Similarities for Anomaly Detection in Sensor Networks
|
eng_Latn
| 137,725 |
how many people use social media for bullying
|
In a random sample study over 14% admitted to cyberbullying another person, with spreading rumors online, via text, or email being the most common form of bullying. (Cyberbullying Research Center, 2015). Girls (40.6%) are much more likely to be victims of cyberbullying than boys (28.8%).
|
1 Over half (52 percent) off young people report being cyber bullied. Embarassing or damaging photographs taken without the knowledge or consent of the subject has been reported by 11 percent of adolescents and teens.
|
eng_Latn
| 137,761 |
Pangr: A Behavior-Based Automatic Vulnerability Detection and Exploitation Framework
|
A brief study of Wannacry Threat: Ransomware Attack 2017
|
Sex differences in tuberculosis
|
eng_Latn
| 137,828 |
Identifying Malicious Nodes in Multihop IoT Networks using Dual Link Technologies and Unsupervised Learning
|
DDoS in the IoT: Mirai and Other Botnets
|
Determining characteristics of successful recommendations from log data: a case study
|
eng_Latn
| 137,864 |
Schedule optimization to improve trunk-local bus transfer efficiency in small conurbations： A case study of New York＇s capital region
|
Fostering the use of transit has been broadly accepted as an effective way to improve social equity and reduce the externalities caused by transportation. In the great body of transit literature, many have focused on the improvement of transfer efficiency. However, investigation on transit transfer efficiency is still lacking for medium sized cities or suburban areas that have sprawled from city centers. The special features associated with such an urban form lead to unique travel patterns and bus operations. This work develops a process to improve bus transfer efficiency for small conurbations considering their special characteristics. A case study of New York’s Capital District is used to illustrate the proposed method. Results show that the transfer waiting time can be remarkably shortened. The proposed method can be widely adapted to other transit systems in small conurbations.
|
The paper furnishes a review of different designs of diesel motor trains, and lists their manufacturers and users. The author discusses the basic properties of trains designed for suburban traffic and indicates the possible trends of future development. Individual practical propositions are committed to analysis regarding drive, transmission and operation of diesel motor trains. Furthermore, the criteria for the option of the diesel motor train in suburban traffic are reviewed.
|
eng_Latn
| 138,001 |
what was iqbal masih legacy
|
His funeral was attended by approximately 800 mourners. His death remains a controversy as some claim he was shot dead by carpet weaving mafia while others say he was shot dead by a farmer. His legacy lives on and United States Labour department has an annual award in his honour The Iqbal Masih Award.
|
Mahmud Hussain. Mahmud Hussain Khan (Urdu: Ù
ØÙ
Ùد ØسÛ٠خاÙâ; 5 July 1907 â 12 April 1975) was a Pakistani academic, educationist, and politician, credited with pioneering the study of social sciences in Pakistan.
|
eng_Latn
| 138,609 |
Reliable Human Fall Prediction with Practical Alert Time and Robot Prediction Algorithm
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Kinect-based choice reaching and stepping reaction time tests for clinical and in-home assessment of fall risk in older people: a prospective study
|
Why I have abandoned robot-assisted transaxillary thyroid surgery
|
eng_Latn
| 138,688 |
Theory of an Intelligent Planning Unit for the Complex Built Environment
|
A conceptual framework for the real-time monitoring and diagnostic system for the optimal operation of smart building : a case study in Hotel ICON of Hong Kong
|
No Relationships Between the Within-Subjects’ Variability of Pain Intensity Reports and Variability of Other Bodily Sensations Reports
|
eng_Latn
| 138,693 |
Development of an Adaptive Gait Characterizer
|
The study of human gait remains one of the finest areas of biomechanics. Commonly available gait characterization systems provide information regarding speed, cadence and calories burnt during an exercise session. However, the gait of an individual changes continuously with every step. Thus, this work is inspired by the need to develop a system which enables real time analysis of critical spatio-temporal gait parameters while adapting to the walking pattern of the subject. The study of these parameters for a given subject enables us to perform an analysis of individualized gait pattern thereby allowing us to develop corrective measures for gait deficits. In this work we present a real-time analysis of intra-limb temporal parameters using the proposed system that adapts to the changing walking speed. 1
|
We present a connectionist model designed for supervised learning of associated patterns, which is based on Kohonen’s self-organizing feature maps. While learning, the classification is performed on both inputs and desired associated ouputs. The learned weights are then used in exploitation phase to associate an input vector with an output one.
|
eng_Latn
| 138,713 |
XWand: UI for intelligent spaces
|
The Cricket location-support system
|
Video capture of the circumstances of falls in elderly people residing in long-term care: an observational study
|
eng_Latn
| 138,823 |
Action2Activity: Recognizing Complex Activities from Sensor Data
|
Activity Recognition from Accelerometer Data
|
Fundamental movement skills and physical fitness as predictors of physical activity: A 6-year follow-up study
|
kor_Hang
| 138,860 |
Detecting Mastication: A Wearable Approach
|
A wearable system for detecting eating activities with proximity sensors in the outer ear
|
Verification of the randomized consensus algorithm of Aspnes and Herlihy: a case study
|
kor_Hang
| 138,872 |
Camera phone based motion sensing: interaction techniques, applications and performance study
|
Recent Developments in Human Motion Analysis
|
The interpretation of a moving retinal image
|
eng_Latn
| 138,880 |
Activity Recognition for the Smart Hospital
|
Predicting human interruptibility with sensors: a Wizard of Oz feasibility study
|
A tutorial on hidden Markov models and selected applications in speech recognition
|
eng_Latn
| 139,048 |
On the number of conjugacy classes of finite nilpotent groups
|
We establish the first super-logarithmic lower bound for the number of conjugacy classes of a finite nilpotent group. In particular, we obtain that for any constant c there are only finitely many finite p-groups of order pm with at most c⋅m conjugacy classes. This answers a question of L. Pyber.
|
Abstract This paper deals with the complexity of context-free grammars with 1-letter terminal alphabet. We study the complexity of the membership problem and the inequivalence problem. We show that the first problem is NP-complete and the second one is Σ P 2 -complete with respect to log-space reduction. The second result also implies that the inequivalence problem is in P space , solving an open problem stated by Hunt, Rosenkrantz and Szymanski (1976).
|
eng_Latn
| 139,105 |
The Finite Groups with the Number of Maximal Order is 28p Elements
|
In this paper we study the finite groups in which the number of elements with the maximal order is 28p(p5 prime numbers 5) and get the following result: such finite groups are solubel.
|
4 pages.-- PACS numbers: 05.45.Xt, 87.10.+e.-- ArXiv pre-print: http://arxiv.org/abs/nlin.CD/0512009.-- Final full-text version of the paper available at: http://dx.doi.org/10.1103/PhysRevE.73.055202.
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eng_Latn
| 139,109 |
Suppose G is an finite group. Let N be a normal subgroup of G and A be an arbitraty subgroup. Prove that $$\mid AN\mid=\frac{\mid A\mid\mid N\mid}{\mid A\cap N\mid}$$ My initial approach is that I should somehow invoke one of the isomorphism theorems that involves quotient group and then apply another theorem to grasp about its size. Yet I've no idea how to actually approach it, especially with the given condition that $N$ is normal.
|
Let $H$, $K$ be subgroups of $G$. Prove that $o(HK) = \frac{o(H)o(K)}{o(H \cap K)}$. I need this theorem to prove something.
|
Let $G = \mathbb{R} / \mathbb{Q}$. Is this an interesting group to study? Is it isomorphic to any more natural mathematical objects?
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eng_Latn
| 139,203 |
Simple method the show that a group of order 15 is cyclic How can i show with quite simple methods that a group of order 15 is cyclic?
|
Group of order 15 is abelian How do I prove group of order 15 is abelian? Is there any general strategy to prove that a group of particular order(composite order) is abelian?
|
Doubt related to a theorem in congruences of Chapter 5 of Apostol Introduction to analytic number theory I am self studying number theory from Introduction to Analytic number theory by Apostol. I have a doubt in one argument of proof of Theorem 5.14 and I am posting its image. My doubt is in 2nd line of 2 nd paragraph how Apostol writes - If y is a solution of (5) then ay $\equiv $ at ( mod m) . How does y being a solution of (5) implies that? Can someone please help
|
eng_Latn
| 139,385 |
Why are the cardinality of $\mathbb{R^n}$ and $\mathbb{R}$ the same? As I study the first part of abstract algebra, I have a question: why $\left\vert{\mathbb R}\right\vert = \left\vert{\mathbb R^2}\right\vert$? And moreover, I knew the fact that $\left\vert{\mathbb R}\right\vert = \left\vert{\mathbb R^n}\right\vert$. Does the equality apply to any infinite set? How can I prove them?
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Cardinality of the Cartesian Product of Two Equinumerous Infinite Sets Is the cardinality of the Cartesian product of two equinumerous infinite sets the same as the cardinality of any one of the sets? I couldn't find this explicitly stated in any handout or text. This certainly seems to be true from the examples I have seen: The Cartesian product of two infinitely countable sets is again infinitely countable. The Cartesian product of two sets with cardinality of continuum again has cardinality of continuum.
|
Is a semigroup with unique right identity and left inverse a group? We know that a semigroup with a right identity and right inverse for all elements is a group (e.g. see ). Symmetrically, also a left identity together with a left inverse implies a group. We also know that a semigroup with a right identity and a left inverse is NOT necessarily a group (see ). My questions are: in a semigroup, is the existence of a UNIQUE right identity together with the existence of a left inverse enough to have a group? in a semigroup, is the existence of a right identity together with the existence of a UNIQUE left inverse enough to have a group? I think both these claims are false, ut haven't found a counter-example so far.
|
eng_Latn
| 139,436 |
Good morning everyone, I'm looking for a subgroup of $Z(G)$ the center of the group $G$ that is not characteristic subgroup of $G$. Did someone have that in his pocket ? I wish you a very good day !
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In the book I'm study is written: A normal subgroup of a group need not be characteristic. And as an exercise I'm supposed to find an example, it also said that is pretty hard to find one. After trying for two days I wasn't able to find one example. So, I'm asking for an example of a group $G$ with a normal subgroup $H$ that is not a characteristic of $G$. I will add some context because maybe it will clarify why the book said it is difficult to find an example: the main problem with the exercise is that until it the book had only covered Group Definition, Subgroups, Lagrange's Theorem and Homomorphisms. So I'm supposed to find a example with such lack of advanced tools.
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In the book I'm study is written: A normal subgroup of a group need not be characteristic. And as an exercise I'm supposed to find an example, it also said that is pretty hard to find one. After trying for two days I wasn't able to find one example. So, I'm asking for an example of a group $G$ with a normal subgroup $H$ that is not a characteristic of $G$. I will add some context because maybe it will clarify why the book said it is difficult to find an example: the main problem with the exercise is that until it the book had only covered Group Definition, Subgroups, Lagrange's Theorem and Homomorphisms. So I'm supposed to find a example with such lack of advanced tools.
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eng_Latn
| 139,623 |
Qualitative study of the solution to a Cauchy problem
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Differential equation $y''=\frac{y'}{2\sqrt y}$
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Groups of order $pq$ without using Sylow theorems
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eng_Latn
| 139,663 |
A Wavelet Local Denoising-Reconstruction Algorithm Based on Non-separable MRA
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A wavelet reconstruction algorithm based on non-separable MRA is proposed.In the algorithm the projection data is disposed with two-channel wavelet decomposement to obtain the approximate coefficient and the detail coefficient of the image,and then after these coefficients are denoised with soft-thresholding,the image is reconstructed through reverse wavelet transform.With this algorithm,the complexity can be reduced.This algorithm not only has shorter reconstructing time,but also can denoise.
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A weightedL2 norm is introduced in which Markov operators, e.g., associated with noisy maps, are contracting provided the kernel (i.e., the transitional distribution) is smooth enough. This results in strong relaxational properties of noisy maps. Similar to this norm, integral functionals appear useful when studying spatiotemporal chaos and random fields.
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eng_Latn
| 140,903 |
Measurement of Background Noise Levels Conducted Over Low Voltage Power Lines in Urban and Rural Areas
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This paper presents results of study focused on the measurement of background noise conducted over low voltage power lines in the 0.15 MHz–30 MHz frequency range in urban and rural areas. The paper also describes relationships, which can be used to assess background noise levels on power lines located in urban and rural areas. A block diagram of a background noise voltage measuring system with supporting components is provided too.
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In order to improve the correctness of locally linear embedding caused by sparse data,a novel dimensionality reduction algorithm based on neighborhood rival linear embedding was proposed in this paper.According to the statistical information,it determines local linear dynamic range,adopts the cam distribution to find neighbors of data points,and avoids the lack of the direction of neighbor selection.In the case of sparse data sets,the algorithm can effectively obtain local and global information of data.The experiment to test the improved algorithm obtains a good effort of reducing dimension.The experimental results on the image retrieval using the Corel database show the efficiency of the algorithm.
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eng_Latn
| 140,904 |
Optimizing Learned Bloom Filters by Sandwiching
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We provide a simple method for improving the performance of the recently introduced learned Bloom filters, by showing that they perform better when the learned function is sandwiched between two Bloom filters.
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We study a new technique for optimal data compression subject to conditions of causality and different types of memory. The technique is based on the assumption that some information about compressed data can be obtained from a solution of the associated problem without constraints of causality and memory. This allows us to consider two separate problem related to compression and de- compression subject to those constraints. Their solutions are given and the analysis of the associated errors is provided. Keywords—stochastic signals, optimization problems in signal processing.
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eng_Latn
| 140,905 |
Feature-preserving lossy image compression using nonlinear PDEs
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In this report, we propose combining the Total Variation denoising method with the high loss wavelet compression for high noise level images. Numerical experiments show that TV-denoising can bring more wavelet coefficients closer to zero thereby making the compression more efficient while the salient features (edges) of the images can still be retained.
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An approach for estimating the parameters of mixed Weibull distributions is presented. The problem is formulated as maximization of the likelihood function of the corresponding mixture model. For the solution of the optimization problem, Bare Bones Particle Swarm Optimization (BBPSO) algorithm is applied. Illustrative example for a case study using censored data are provided in order to show the suitability of the BBPSO algorithm for this kind of problem very common in lifetime modelling.
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eng_Latn
| 140,913 |
Residual-Guide Feature Fusion Network for Single Image Deraining
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Removing Rain from a Single Image via Discriminative Sparse Coding
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Designing a business model for smart water management system with the smart metering system as a core technology: Case study: Indonesian drinking water utilities
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kor_Hang
| 140,953 |
external prior guided internal prior learning for real - world noisy image denoising .
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Shrinkage Fields for Effective Image Restoration
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A conceptual model of client-driven agile requirements prioritization: results of a case study
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eng_Latn
| 141,077 |
Sarandon and Fiennes compelling as unlikely duo
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In the case of Doris Duke and Bernard Lafferty, little is known but much is imagined. Thanks to the part that is imagined, HBO's "Bernard and Doris" emerges as a sensitive study of two forlorn souls with little in common but a growing dependence on each other.
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By TACON, Terry `The neighbours have been great, providing paddocks and a water system' -- Graham Haynes -------------------- IT'S HARD to keep a good dairy team down, but the example being set by Southland sharemilkers Graham and Glenda Haynes is exceptional.
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eng_Latn
| 141,627 |
Effect of Cleft Type on Overall Speech Intelligibility and Resonance
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The main purpose of this study was to measure and compare the effect of an unilateral cleft lip and palate (UCLP) and a bilateral cleft lip and palate (BCLP) on overall speech intelligibility, nasalan
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In this article, we examine disability and eugenics discourses and the ways they function in spaces where vulnerable persons have been historically excluded by the state and blamed for their own “immiseration.” We ask how queer theories of repudiation, abjection, and vulnerability lend insight into the ways that people with intellectual disabilities are discursively located outside normative discourses of home, care, and quality of life, and whether these discourses shifted to serve this vulnerable population when historically the very places in question repudiated them, infringed on their human rights, and questioned their sexuality. To address these questions, we focus on the recent and impending closures of Virginia’s Training Centers, residential institutions for persons with intellectual disabilities now scheduled for staggered closures before 2020.
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eng_Latn
| 143,377 |
Psychologists to review stance on gays
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The American Psychological Association is embarking on the first review of its 10-year-old policy on counseling gays and lesbians, a step that gay-rights activists hope will end with a denunciation of any attempt by therapists to change sexual orientation.
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WASHINGTON Ethical concerns have prompted the government to postpone a study of how children's bodies absorb pesticides and other chemicals.
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eng_Latn
| 143,402 |
Gays' Global Search For Acceptance
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More than 70 countries prosecute people on the grounds of their sexual orientation according to a new study, with punishments ranging from prison terms to death sentences. Even in places where sexual orientation isn't a crime, gay, lesbian and transgender people often face prejudice, harassment and violence.
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-- N-P-R's David Baron reports world leaders are gathering this week in New York to review progress five years after the Earth Summit. But there's widespread pessimism about the prospects for what can be achieved on many issues, including global warming.
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eng_Latn
| 143,807 |
Observation of free surface-induced bending upon nanopatterning of ultrathin strained silicon layer
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Stresses in strained GeSi stripes: Calculation and determination from Raman measurements.
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Methodological constraints in the molecular biodiversity study of a thermomineral spring cyanobacterial mat: a case study
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eng_Latn
| 143,883 |
In this paper, we consider plasmonic nanoantennas with different elliptical metal rods embedded in a two-arm grating. Elliptical metal rods support dipolar localized plasmon resonance with a localized plasmon resonance frequency that is affected with different metal materials. We discuss the properties and parameters of different elliptical metal rods using finite-difference time-domain method in nanoantenna arrays. And we propose a design of photonic-plasmonic nanoantennas, which obtain electrical field properties at the subwavelength focal point in nanoantenna arrays.
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The authors have demonstrated a surface plasmon device composed of a resonant optical antenna integrated on the facet of a commercial diode laser, termed a plasmonic laser antenna. This device generates enhanced and spatially confined optical near fields. Spot sizes of a few tens of nanometers have been measured at a wavelength ∼0.8μm. This device can be implemented in a wide variety of semiconductor lasers emitting in spectral regions ranging from the visible to the far infrared, including quantum cascade lasers. It is potentially useful in many applications including near-field optical microscopes, optical data storage, and heat-assisted magnetic recording.
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Since the end of the Cold War, the study of European defence has been dominated by a ‘Common Security and Defence Policy (CSDP)-centric’ approach, while largely neglecting the comparative analysis ...
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eng_Latn
| 143,903 |
In this paper, we propose a novel approach to on-chip cooling by thermionic emission by using vertical superlattices fabricated directly into the silicon wafer as opposed to conventional planar additive deposition methods used by most other groups. The advantages of this method are (i) significantly lower fabrication costs and (ii) adequate number of superlattice layers translating to higher efficiency. Initial fabrication has been completed on micro-scale ‘superlattices’ and work on ‘nano’-superlattices for actual thermionic emission and on-chip cooling are on-going. Measurements of thermal conductivity have been proposed to be made on the completed devices using the 2ω method. Further work will lead to conclusive results from this approach.
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A three-dimensional heat conduction model is presented, coupled with a frequency-domain thermoreflectance measuring bench. The combination of these tools makes it possible to determine the thermal properties of thin film materials deposited on thick substrates, for a wide range of thermal conductivity and diffusivity. We give an example of experimental determination of the properties of a gold layer, the results of which are compared to the literature. We then present a sensitivity study using simulations for a 200 nm thin layer of polylactic acid, deposited on a silicone substrate and covered by 100 nm of gold.
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Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights.
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eng_Latn
| 143,924 |
Investigation of the surface state distribution profile in C d S using the acoustoelectric effect
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Surface acoustic waves propagating in a piezoelectric substrate can interact with the charge carriers in a semiconductor by means of the electric field which accompanies them. One effect which appears in such an interaction is the transverse acoustoelectric effect, which ca be used to determine the surface state spatial distribution profile. This paper reports on the use of this method to study the surface of a high resistivity CdS specimen
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A refined asymptotic model of fluid-structure interaction in scattering by elastic shells is proposed. The model takes into consideration transverse compression of a shell by a fluid and some other phenomena. As an illustration, scattering of a plane acoustic wave by a circular cylindrical shell is considered. Comparison of numerical data corresponding various approximate approaches is provided.
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eng_Latn
| 143,954 |
Selective Removal of the Tert-Butoxycarbonyl Group from Secondary Amines: ZnBr2 as the Deprotecting Reagent
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Abstract ZnBr2 in dichloromethane is a convenient reagent for mild and selective removal of the tert-butoxycarbonyl group from secondary amines.
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A theoretical study was carried out to determine the dielectric response and tunability of a composite consisting of a linear, low-loss dielectric matrix with uniformly sized, randomly distributed paraelectric Ba0.60Sr0.40TiO3 (BST 60/40) particles as functions of the volume fraction and size of the particles. The field dependence of the polarization and the dielectric response of the inclusions are specified through a nonlinear thermodynamic model and then incorporated into a two-dimensional finite element analysis. Near the percolation threshold for BST particles (∼27% to 45% depending on the particle size), high dielectric tunabilities with a lower effective permittivity than monolithic BST can be realized.
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eng_Latn
| 143,955 |
The first photometric study of semi-detached eclipsing binary V504 Cyg
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Abstract In this paper, we analyze photometry of V504 Cyg semi-detached binary system. For this purpose, after taking the photometric data, primary and secondary minimum and new epoch were calculated. The period of system is found to be 0.3516916 day. Analysis of light curve was performed by PHOEBE software which uses last version of Wilson–Devinney code. 3D model of the system is worked out using Binary Maker software. The O’Connell effect in the light curve is observed and an accurate model of this system is presented by introducing four spots on the components.
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This paper describes how to characterize the pad structure embedding silicon devices directly in terms of scattering parameters. The new procedure accounts for distributed effects associated with the structure itself (e.g. the so-called dangling source leg effect) and other coupling effects. The proposed approach is key to extending device characterization into the mm-wave range. The procedure makes use of standard structures typically available on silicon tiles without calling for measurements of additional structures. Further, it does not rely on an equivalent circuit of the structure for its characterization. The procedure is demonstrated by measurements of structures available on the Tower-Jazz semiconductor SBC13 SiGe BiCMOS process. Results acquired over the broad range of frequencies from 2 to 50GHz will be presented and discussed.
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eng_Latn
| 143,972 |
Demonstration of a Lightguide Detector for Liquid Argon TPCs
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We report demonstration of light detection in liquid argon using an acrylic lightguide detector system. This opens the opportunity for development of an inexpensive, large-area light collection system for large liquid argon time projection chambers. The guides are constructed of acrylic, with TPB embedded in a surface coating with a matching index of refraction. We study the response to early scintillation light produced by a 5.3 MeV . We measure coating responses from 7 to 8 PE on average, compared to an ideal expectation of 10 PE on average. We estimate the attenuation length of light along the lightguide bar to be greater than 0.5 m. The coating response and the attenuation length can be improved; we show, however, that these results are already sucient for triggering in a large detector.
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Abstract In this paper, we investigate the time-dependent Ginzburg–Landau (TDGL) equations coming from the superfluid atomic Fermi gases near the Feshbach resonance from the fermion–boson model. By the method of a priori estimates, we get the existence of global attractors in the case of BCS–BEC crossover.
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eng_Latn
| 143,976 |
Tetrafluoroethylene / hexafluoropropylene copolymer and the wire
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A method of producing a fluororesin composition includes copolymerizing at least tetrafluoroethylene with hexafluoropropylene so that a melt flow rate at 372 degree C. of the copolymer formed in the copolymerization changes from 0.05-5.0 grams/10 minutes to 10-60 grams/10 minutes. The tetrafluoroethylene/hexafluoropropylene copolymer can be used as a coating on an electrical wire.
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We study the basic properties of tensor random fields (TRFs) of the wide-sense homogeneous and isotropic kind with generally anisotropic realizations. Working within the constraints of small strains, attention is given to antiplane elasticity, thermal conductivity, classical elasticity and micropolar elasticity, all in quasi-static settings albeit without making any specific statements about the Fourier and Hooke laws. The field equations (such as linear and angular momentum balances and strain–displacement relations) lead to consequences for the respective dependent fields involved. In effect, these consequences are restrictions on the admissible forms of the correlation functions describing the TRFs.
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eng_Latn
| 143,995 |
Theory of complementary holograms arising from electron–hole transport in photorefractive media
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The time evolution of space-charge field gratings in photorefractive media is derived for a simple two-level electron–hole-transport model. At one level, charge transfer occurs by electron transport, and at the other, by hole transport, thus leading to the formation of complementary gratings. If the characteristic lifetimes of the gratings differ significantly, extended-lifetime gratings are possible. The role of the applied electric field in the evolution of such gratings is examined, and limiting cases are considered. The results of the derivation are compared with examples of complementary gratings in the literature.
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This study investigates the hydrodynamic performance of a submerged two layer horizontal plate breakwater. The plate thickness is considered as non-zero in the study. In the context of linear potential theory, an analytical solution for interaction of water waves with the plates is obtained using the matched eigenfunction expansion method. The solution consists of a symmetric part and an antisymmetric part. Its validity is confirmed by comparing the numerical results of reflection and transmission coefficients for limiting cases with previous predictions. Numerical examples are given to examine the major factors that affect the reflection and transmission coefficients of the plates. Some useful results are presented for engineering design.
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eng_Latn
| 144,003 |
Optical beam deflection method for the diagnostics of nanosuspension
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The theoretical analysis of the light induced mass transport task was executed in the nanosuspension in a homogeneous light field. As a result of the analytical solution of the light induced mass transport task it was obtained an expression for the deflection angle of the beam in a pseudo-prism. The using of high intensities of the reference beam allows significantly increase the efficiency of the beam deflection method. The results are relevant in the study of the dispersed liquid media, as well as optical diagnostics of such materials.
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Corrosion and protection of the underwater steel structures for W114A platform were investigated.The offshore platform has been in service in the South China Sea for 15 years.It was found that the bio-fouling was serious and the maximum attachment thickness was 20cm,while,the cathodic protection system was normal and the protective effect was favorable.After analyzing the detective methods and their results,some problems were found.The program of potential detection was inappropriate,the detection method for physical size of the sacrificial anodes was inaccurate,and the base surface of the thickness measurement points was not clean;therefore,the cathodic protective effect could not be accuraely evaluated.To solve these problems,some valuable suggestions are put forward accordingly.
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eng_Latn
| 144,041 |
Effect of externally applied electric field to a light beam self-action in a lithium niobate waveguide
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We study the photorefractive self-action of light beams within an iron-doped planar optical waveguide in lithium niobate biased by external electric field, to find the conditions for the formation of quasisteady-state screening-photovoltaic spatial solitons. Their formation is expected to take much shorter time compared with the steady-state photovoltaic solitons.
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We provide an overview of the background and recent developments in the study of the morphology evolution of thin film growth. In particular, complex non-local growth effects, including the shadowing effect and the re-emission effect, have been recently shown to significantly alter an evolving growth front. The physical principles behind these non-local effects are discussed, along with techniques used by researchers in the field to model such growth.
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eng_Latn
| 144,054 |
Three-dimensional imaging of direct-written photonic structures
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Third-harmonic generation microscopy has been used to analyze the morphology of photonic structures created using the femtosecond laser direct-write technique. Three-dimensional waveguide arrays and waveguide-Bragg gratings written in fused-silica and doped phosphate glass were investigated. A sensorless adaptive-optical system was used to correct the optical aberrations occurring in the sample and microscope system, which had a lateral resolution of less than 500 nm. This nondestructive testing method creates volume reconstructions of photonic devices and reveals details invisible to other linear microscopy and index profilometry techniques.
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Solution phase driven deposition methods such as casting or micro-molding are not much explored in amorphous chalcogenide glasses for Infrared (IR) optical component fabrication, which could be a simple and low cost alternative unlike conventional thin film deposition techniques such as vapor phase deposition methods. To use such deposition technique optimization of solution preparation conditions in order to retain the optical properties of the solute is the key factor. In this present study, we report on the dissolution kinematics of (As2S3)100-xGex (x=0, 20, 40) glasses in ethylenediamine solvent. Dynamic Light Scattering (DLS) result indicates particle size of the solution is <30nm, which is an essential requirement for the fabrication of low surface roughness films in these materials. Optical properties of the solution are discussed.
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eng_Latn
| 144,058 |
Design of two devices for biaxial stresses and their application to silicon wafers
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Two devices have been constructed for the development of biaxial stresses and the study of deformation potentials on thin layers. In the first device hydrostatic pressure was employed to develop a two-dimensional stress environment on thin silicon wafers. The deformation of the plates was found to be related to the third root of the pressure applied, in good agreement with theory. The second apparatus used a central force for the bending of the wafer, and the stresses, as detected from the frequency shift of the silicon phonon line in the Raman spectra, were confined to a small area of the plate. In both devices and analytic relation between the radius of curvature at the centre of the wafer and the stresses developed was established.
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A theoretical analysis of a rectangular microstrip antenna along a helical direction on a cylindrical substrate is shown in this article. The cavity model with magnetic side walls approximation is used for the calculation of the resonant frequency and input impedance. The theory of dyadic Green's functions in conjunction with the saddle point method are used for the evaluation of the far fields. Results are shown for the TM01 mode.
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eng_Latn
| 144,059 |
Imbert-Fedorov Effect in Kretschmann Configuration with Anisotropic Metamaterial
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We study the Imbert-Fedorov (IF) effect in Kretschmann configuration with anisotropic metamaterial to explore a flexible method to enhance and modulate IF shift. The physical mechanism for large IF shifts in an anisotropic waveguide based on spin-orbit angular momentum coupling is explained. The influences of metamaterial thickness, anisotropy, and loss on IF shift are systematically discussed. This provides a theoretical prediction of IF shift in a Kretschmann configuration which is verified by simulation results in semiconductor metamaterial waveguide. The simulation results show that both metamaterial anisotropy and loss contributes significantly to the IF shift. Thus, reducing the loss and enhancing the metamaterial anisotropy are necessary and important measures to realize enhanced IF effect in the proposed Kretschmann configuration.
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Recently Geis fabricated a composite cold cathode emitter made of diamond doped by substitutional nitrogen on a roughened metallic substrate, which is characterized by high field emission currents at very low power. Using an internal field emission mechanism through the Schottky barrier at the metal diamond interfaces to populate the conduction band of diamond, we have developed a quantitative theory to describe the operation of such a device. The calculated I-V characteristics are in good agreement with the experimental results of Geis, et al.
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eng_Latn
| 144,067 |
Fracture of steels with the ferrite-pearlite structure in a liquid-metal environment
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A study has been made of the effects produced by a liquid-metal environment on the mechanical properties and the character of fracture of the steels with the ferrite-pearlite structure containing from 0.03 to 0.8% carbon under the static and cyclic loading. The liquid metal environment has been shown to facilitate the development of plastic deformation in the surface layer of a specimen. The liquid metal has been shown to affect the character of failure. The effect of liquid metal causing deterioration of the properties is smaller in the pearlite specimens under static loading compared to ferrite specimens, and in specimens under cyclic loads the effect is reversed. The results have been analyzed and a mechanism of the effects produced by liquid metal on the failure processes has been suggested
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Publisher Summary ::: Wave propagation in asymmetrically stacked composite laminate, because of high frequency impact loading, is studied using a new spectral finite element (SFE) formulation. This novel element is developed using matrix methodology similar to finite element (FE) formulation and has an exact dynamic stiffness matrix, obtained by exactly solving the governing Navier equation in the frequency-domain. As the mass distribution is modeled exactly, the element gives the exact frequency response of each layer. Thus, one element may be as large as one complete layer; and as a result, the system size is nominal compared to the conventional FE system sizes. The fast-Fourier transform (FFT) and Fourier series are used for inversion to the time/space domain. The element captures the essential wave propagation phenomena successfully and demonstrates Rayleigh wave in the surface and Stoneley wave in composite layer interfaces.
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eng_Latn
| 144,069 |
The effects of sheet thickness on the oscillation of an air-blasted liquid sheet
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In the present work, experiments have been performed to study the influence of the sheet thickness on the oscillatory movement of an air-blasted liquid sheet, based on measurements of oscillation frequencies and wavelengths. To measure the wavelengths, a novel double-beam diffraction technique has been implemented. It has been determined that the sheet oscillation frequency depends on the inverse of the square root of the sheet thickness, while the wavelength increases linearly as sheet thickness is increased. Based on these dependencies, suitable non-dimensional groups are proposed to describe the problem. Wave propagation velocities have also been calculated and discussed.
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The present invention provides a touch screen suitable for use in high definition CRT in recent years, FPD and other display screens and other anti-Newton ring sheets used and the use of the anti-Newton ring sheet touchscreen. Anti-Newton ring sheet of the present invention is a plurality of column 2 by spacing structure 3 formed in parallel, the column height 2 is configured to vary the flow direction of the ridgeline. 2 changes the height of the column is preferable that the structure is periodic variation period which is within the range of 20μm ~ 4000μm.
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eng_Latn
| 144,077 |
Magnetic nanowire arrays: A study of magneto-optical properties
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Nanocomposite films of highly ordered magnetic nanowires embedded in anodic aluminum oxide templates were fabricated and magneto-optical properties were studied. Following our previous work, studies on Co nanowire arrays were carried out, where the MO properties in relationship with nanowire lengths and diameters were investigated. The results were found to be considerably different from corresponding bulk metal. We demonstrated that the Faraday effect was a convenient and useful probe for the study of the magnetic properties of these semitransparent nanocomposite films. A preliminary study on the photon energy dependence of the magneto-optical properties of Fe nanowire arrays was also conducted in the visible spectrum regime.
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We give a simple and complete characterization of the optimum transmitter correlation matrix for multiple-input-multiple-output (MIMO) systems, when antenna subset selection is used. It is assumed that the receiver feeds back to the transmitter only the selected set of antennas without providing any kind of rank ordering of the selected antennas. It turns out that the optimal correlation matrix in this case must be a convex combination of an identity matrix and a matrix whose elements are all ones. This reduces the problem of finding the actual optimum to a one-dimensional search in any given scenario.
|
eng_Latn
| 144,087 |
Optical properties of plasmonic nanoparticles
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In the first part of this work, it has been spoken of quantum-relativistic effects due to interband transitions. Quantum theory allows one to distinguish between intraband free electrons transitions and d-electron transitions from fully occupied d-band to sp-type conduction band. Thorough measurements allow one to give the exact photon energy value needed for interband transition [Johnson and Christy 1972: 4370]. The necessity of introducing corrections for these effects is the reason why in this work Johnson’s and Christy’s results are used, which provide better agreement with reality (see. chapter 1.1.3), instead of Drude model. Optical properties of near and far field for gold nanorods have been obtained numerically with finite element method (FEM) in frequency domain with COMSOL Multiphysics 4.3a software.
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Abstract A study was performed to investigate the effects of the application of an atmospheric-pressure plasma jet during polycrystalline diamond (PCD) micro- end-milling. A comparison was made between SiC surfaces after milling, with and without the application of the plasma jet. The plasma jet was found to allow the formation of a high-quality surface with an average roughness ( R a ) of 0.73 nm. The proposed plasma jet is highly effective in improving both the chip formation process, by imparting hydrophilicity to the tool and workpiece surfaces, and removing surface contamination at the tool edge during machining.
|
eng_Latn
| 144,089 |
Comparative study of different Schlieren diffracting elements
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This paper presents an analysis of diffraction effects taking place at different Schlieren diffracting elements. Two types of diffraction effects are prominent in the Schlieren schemes. One is diffraction of direct light (source image) at the Schlieren element, which limits the sensitivity and resolution of Schlieren systems. The second type is the diffraction of light deflected from the test object at the Schlieren-diffracting element. This second type of diffraction degrades the quality of Schlieren results. Experimental results showing the effect of diffraction of light deflected from the test object at a phase knife-edge, corner of a square phase aperture and an optical fiber tip as Schlieren diffracting elements have been presented and discussed.
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$^{\ast}$ Supported in part by a grant and a fellowship from the National Science Foundation. $^{1}$ A. C. Albrecht, J. Mol. Spectroscopy 6, 84 (1961)
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eng_Latn
| 144,100 |
Reaction between vitreous SiO2 and Al
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Rate of reaction between Al and SiO2 in vitreous silica or in silicate was measured between 500°C and 600°C in air or vacuum. The reaction couples used in the study were aluminum-silica glass and aluminum-Shirasu Balloon, which was a hollow microsphere of aluminosilicate glass. In the present study, it was found that the rate determining stage of the reaction between SiO2 and Al was associated with breaking of a Si-O bond. Apparen+ activation energies of the reaction are 56.5cal/mol for the silica glass-aluminum system and 78.7cal/mol for the Shirasu Balloon-aluminum system, respectively.
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Abstract Partly oxidized Ag films deposited on glass substrates were found to exhibit significantly different reflectance properties for either s- or p-polarized incident light under conditions of total internal reflection. The measured reflectances depend strongly on angle of incidence and wavelength of light and are sensitive functions of the Ag and Ag 2 O layer thicknesses. For pure and slightly oxidized Ag films we observe the evolution of the well known surface plasmon resonance, whereas for Ag films with an increasing oxide layer a new resonance is observed in s-polarization. We account for all these effects by modeling the oxidized Ag film as a glass/Ag/Ag 2 O/air system and using the recently published optical constants for Ag 2 O.
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eng_Latn
| 144,101 |
Vibration influence on structure and density of aluminum alloys
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The results of study on aluminum alloys of grade AK9M2 AK12M2 are provided. Alloy crystallization time for alloys AK9M2 AK12M2 decreases, the intensity of reduction depends on the vibration amplitude. For alloys AK9M2 and AK12M2 the optimal amplitude is 2^2.2 mm, allowing a dense cast alloy with a fine grain structure to be obtained. Density of samples from AK12M2, cut from the bottom part, is slightly increases with the rise of the vibration amplitude.
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Abstract By using a five pass Fabry-Perot interferometer we have observed Brillouin scattering from longitudinal sound waves in films of amorphous silicon prepared by glow discharge decomposition of silane. Both the sound velocity and the scattering efficiency are found to depend on the hydrogen content of the film. For small hydrogen content the velocity is observed to be comparable with that of crystalline Si. The implications of our results for pure amorphous Si are different than for the results of Testardi and Hauser on sputtered samples.
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eng_Latn
| 144,105 |
Chapter 6 - THIN-FILM WAVEGUIDE FABRICATION AND TESTING CONSIDERATIONS
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In this lecture the fabrication of thin-film dielectric waveguides with two dimensional confine ment is described. A review of etching and implantation techniques that have been used to fabricate glass waveguide bends and couplers is given. Also included is a description of some of the testing procedures that have been used either during the fabrication process or to determine the optical properties of waveguides.
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The effects of absorbed water and environmental cycling on phenol formaldehyde/glass fiber composites were examined in this study. The process of water ingression was found to follow a Fickian diffusion model. The loss modulus of the laminates decreased as a result of water absorption and thermal cycling. Laminates that contained water demonstrated an increase in storage modulus with thermal cycling at high temperatures. Furthermore, it was shown that the majority of property changes occurred when the laminates were exposed to extreme conditions that caused the absorbed free water to freeze or vaporize.
|
yue_Hant
| 144,125 |
Strong Resonance and Terahertz Wave Transmission Enhancement of Low-Porosity Metal Hole Array with Bow-Tie-Shaped Apertures
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Metallic plates with arrays of subwavelength apertures appear to have several resonances due to coupling with incident electromagnetic waves. In the terahertz wave range, a sensing method using these structures has already been proposed. In order to study structures to obtain high sensitivity, we fabricated a metallic structure with bow-tie-shaped apertures and measured its transmission properties. The transmission peak frequency was at lower frequencies than the resonance frequency decided by its lattice shape, and depended strongly on the aperture shape. We observed very high transmission efficiency and strong resonance of the structure when the shape resonance corresponded to the lattice resonance.
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Abstract A layer of random defects in the simple cubic Ising model with nearest neighbor ferromagnetic interactions of strength J is considered. Using the real space renormalization group method we calculate defect free energy in the whole temperature range. Specifically, we analyze: the layer of diluted defects, the layer of spin-glass type defects, and the layer of mixed defects. The free energy is strongly dependent on the value of couplings between the defect and the bulk.
|
eng_Latn
| 144,132 |
The Vocal Memnon and Solar Thermal Automata
|
A memnonium is a selfactuating system that generates music using solar energy. The name comes from the statue of Memnon, a famous tourist attraction in the Greco-Roman world that was said to emit sound when warmed by the morning sun. The Memnon statue inspired the design of musical automata in later periods, to which there are many historical references. Several intriguing technologies and engineering methods may be well suited for modern memnonium design efforts. However, full realization of solar thermoacoustic and thermokinetic sculpture would likely require deep collaboration between physics, music and other disciplines. In modern times, only a few simple proofof- concept memnonia have been constructed.
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We study the photorefractive self-action of light beams within an iron-doped planar optical waveguide in lithium niobate biased by external electric field, to find the conditions for the formation of quasisteady-state screening-photovoltaic spatial solitons. Their formation is expected to take much shorter time compared with the steady-state photovoltaic solitons.
|
eng_Latn
| 144,138 |
On the use of specular neutron reflection in the study of roughness and interdiffusion in thin-film structures
|
Abstract Some new possibilities of using specular neutron reflection in the study of roughness and interdiffusion in thin-film structures have been proposed and tested (the use of polychromators and supermirrors, direct measurement of the thickness of nonmagnetic interdiffusion layers). A statistical roughness growth law was found to be satisfactory in the interpretation of results, the growth rate being dependent on the materials used, film deposition techniques, etc. The use of ( λ 4 , λ 2 ) -sequences is proposed to increase the sensitivity of the method to the nonmagnetic interdiffusion layer thickness.
|
Results from three different projects that involved either absolute or relative measurement of solar radiation at the NOAA Mauna Loa Observatory are reported. Included are measurements, in summary form, of broadband solar irradiance, spectral aerosol optical depth, and spectral diffuse-sky irradiance. Each data set includes the influence of the stratospheric debris from the eruption of El Chichon. Procedures that were used to acquire and finalize the observational records are documented.
|
eng_Latn
| 144,141 |
Measuring the Thermo-Optic Response of Dielectric Stack Mirrors
|
Using a pump-probe Michelson experiment, we test the theory of thermo-optic (TO) effects in dielectric mirror coatings. We observe partial cancellation between coating expansion and TO effects. We also measure relevant thin film material parameters.
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This study investigates the hydrodynamic performance of a submerged two layer horizontal plate breakwater. The plate thickness is considered as non-zero in the study. In the context of linear potential theory, an analytical solution for interaction of water waves with the plates is obtained using the matched eigenfunction expansion method. The solution consists of a symmetric part and an antisymmetric part. Its validity is confirmed by comparing the numerical results of reflection and transmission coefficients for limiting cases with previous predictions. Numerical examples are given to examine the major factors that affect the reflection and transmission coefficients of the plates. Some useful results are presented for engineering design.
|
eng_Latn
| 144,174 |
A setup for simultaneous many-angle measurements of elastic backscattering cross sections
|
Abstract A scattering chamber is described, which was constructed and installed at the KN3000 Van de Graaff accelerator in Florence, for a systematic study of proton and alpha elastic backscattering cross sections on light nuclei, as a function of both bombarding energy and scattering angle. Sixteen silicon detectors, which can be cooled down to LN 2 temperature, have been mounted at backward angles from 95° to 170°. Test measurements show that an overall accuracy of the order of 1–2% is attainable for the cross section values. These measurements also point out that special care should be devoted to the determination of the effective target thickness under beam bombardment.
|
This work investigated analytically the band structure of photonic crystals (PCs) with alternate layers of left and right-handed materials in one-dimension. It was found that, under certain conditions, new peculiar band structures not seen in all right-handed material PCs appeared. We transformed the analytic dispersion relation into two cosine terms, and obtained an interesting band structure using the new form of dispersion equation. Conditions for obtaining such peculiar band structure were given.
|
eng_Latn
| 144,187 |
ST Quartz Acoustic Wave Sensors with Sectional Guiding Layers
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We report the effect of removing a section of guiding layer from the propagation paths of ST-quartz Love wave sensors; this offers the ease of fabrication of a polymer guiding layer whilst retaining the native surface of the quartz which may then be used for the attachment of a sensitizing layer. Data is presented for rigid and viscous loading, which indicates a small reduction in mass sensitivity compared to a Love wave device. Biosensing capabilities of these discontinuous ‘sectional’ guiding layer devices are demonstrated using protein adsorption from solution.
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The soft X ray streak camera is very important detection tool for studying soft ray time characteristics. We calibrated its relative energy response and gain with synchrotron radiation light source on the BSEF. The experimental results agree with those calculated by B.L. Henke.
|
eng_Latn
| 144,193 |
Electrodeposition of diamond-like carbon thin film on conductive indium-tin-oxide glass substrate
|
This paper presents electrodeposition of diamond-like carbon (DLC) thin film deposits on indium tin oxide (ITO) glass substrate under voltage 2.1V∼120V with mixing varying acetic acids' portions with deionized water, forming 0.2∼0.8% electrolytic solutions. The result shows that at deposition temperature 30°∼65°, voltage 50V and 0.8% electrolytic solution concentration of DLC thin films, the reflection index reduced to 60%, and theoretical matching refractive index became 1.32. This finding is applicable on various optoelectronic device like protective or window layer of solar cell.
|
Abstract The moving parts of any mechanism and machine parts are always subjected to a significant wear due to the development of friction. It is utmost important aspect to address the wear problems in present environment. But the complexity goes on increasing to replace the worn out parts if they are very precision. Technology advancement in surface engineering ensures the minimum surface wear with the introduction of polycrystalline nano nickel coating. In this study, tribological behavior of the nano nickel coating developed through pulsed electro deposition technique has been investigated. The nano structured coated specimen were admitted for pin and disc method of wear testing. The nature of wear has been examined over the surface of the specimen through Atomic Force Microscope (AFM) in order to validate the prior results. The results yielded from pin and disc and AFM registered the negligible deviations.
|
eng_Latn
| 144,197 |
Propagation of plasma bullets in helium within a dielectric capillary?influence of the interaction with surfaces
|
This paper reports an experimental study on the propagation of an ionization wave inside a thin capillary, called ?plasma bullet?. A low-frequency sinusoidal voltage is applied and several bullets are emitted during each cycle. The delay between two successive discharges is short enough so the propagation of one bullet is influenced by the charges deposited on surfaces by the previous one. It was shown that the propagation length increases during the cycle. An interesting result is that a discontinuity during the propagation of a bullet has been clearly pointed out. When it crosses the discontinuity, the bullet has been shown to increase its light emission and its propagation velocity. It was explained by a transition between regions of different potential, due to charges deposited by the previous bullets.
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Abstract Thanks to their high hydrogen permeability, vanadium based alloys can be a valuable and sustainable alternative to palladium alloys, commonly employed in commercial membranes for hydrogen purification/separation. In this work, the unprecedented deposition of micrometric vanadium-based multilayers and their investigation as hydrogen selective membranes have been reported. In particular, this work describes the use of High Power Impulse Magnetron Sputtering, a technique easily scalable also for complex geometries, for the deposition of dense and crystalline Pd/V93Pd7/Pd multilayers with total thickness
|
eng_Latn
| 144,204 |
Experimenta l investigation of tribological characteristics of nanocrystalline nickel protective coating developed through electro deposition technique
|
Abstract The moving parts of any mechanism and machine parts are always subjected to a significant wear due to the development of friction. It is utmost important aspect to address the wear problems in present environment. But the complexity goes on increasing to replace the worn out parts if they are very precision. Technology advancement in surface engineering ensures the minimum surface wear with the introduction of polycrystalline nano nickel coating. In this study, tribological behavior of the nano nickel coating developed through pulsed electro deposition technique has been investigated. The nano structured coated specimen were admitted for pin and disc method of wear testing. The nature of wear has been examined over the surface of the specimen through Atomic Force Microscope (AFM) in order to validate the prior results. The results yielded from pin and disc and AFM registered the negligible deviations.
|
Abstract The temperature-spectral dependencies of refractive indices ni and birefringence Δni of first time synthesized RbNH4SO4 crystals in wide temperature (77–300 K) and spectral (250–850 nm) regions were measured. It was shown that ni dispersion is normal and very fine described by Zelmeer's formula. It was found that Δny = 0 for λ = 633 nm at T=189 K and the isotropic point have a nearly “isospectral” character. The isotropic point is displacing to longwave region at temperature decrease. The second-order phase transition at T = 120 K was observed.
|
eng_Latn
| 144,207 |
A study of optical absorption edges in copper-calcium phosphate glasses containing iodine
|
A series of glass specimens was prepared from mixtures of CuO, CaO, P2O5 and CuI and their optical absorption coefficients were measured as functions of photon energy in the range 3.0 to 4.5 eV. From the results the values of the optical energy gap are calculated and found to depend quite sensitively on the added iodine.
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First measurements of visibility and phase of two-beam interference fringes are presented for a large number of different states of polarization of light entering an interferometer. The measurements were made with a cube-corner interferometer. Results confirm the theory of complex visibility. It is demonstrated, that exact computer calculations are possible and informative. A comparison of observed and calculated values is represented in the s-diagram and some important relations and conclusions are discussed.
|
eng_Latn
| 144,212 |
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