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A finite element study of the onset of vortex shedding in a flow past two-dimensional circular cylinder
|
A global stability analysis of the steady and periodic cylinder wake
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,349 |
A case study for energy issues of public buildings and utilities in a small municipality: Investigation of possible improvements and integration with renewables
|
New Surrogate Model for Wind Pressure Coefficients in a Schematic Urban Environment with a Regular Pattern
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,394 |
TM-Landsat imagery applied to the study of the impact of global climate change on a tropical coastal environment during the last deglaciation
|
Singular Spectrum Analysis of Nonstationary Tidal Currents Applied to ADCP Data from the Northeast Brazilian Shelf
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,439 |
Numerical study of a round buoyant jet under the effect of JONSWAP random waves
|
Characteristics of nonbuoyant jets in a wave environment investigated numerically by SPH
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,488 |
VHF scintillation associated with equatorial plasma bubbles over low latitude Indian region: a case study
|
On the validity of the ionospheric pierce point (IPP) altitude of 350 km in the Indian equatorial and low-latitude sector
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,592 |
[Clinical and experimental study on Shuanghua aerosol in treating infantile upper respiratory tract infection].
|
Novel herbal drug delivery system: An overview
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,616 |
Long-term corrosion-resistance of an uncoated weathering steel and its on-line and in-situ measurements
|
The study on corrosion of the inner area of closed box-girder for unpainted weathering steel bridges
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,634 |
Cosmic Ray Observations in the 3-D Heliosphere through the Solar Cycle: New Insights from Ulysses
|
Integrated study of the thermoluminescence, noble gases, tracks, and radionuclides in the fresh-fallen Ash Creek L6 and Tamdakht H5 chondrites
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,652 |
A self-complementary antenna for WLAN and WiMAX applications using traditional molding skills and techniques
|
A study into the effect of smartphone development on antenna design
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,654 |
A modelling case study of an island mode solar power plant
|
Simulation and Pricing Mechanism Analysis of a Solar-Powered Electrical Microgrid
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,692 |
A case study on generation mechanisms of a sporadic sodium layer above Tromsø (69.6° N) during a night of high auroral activity
|
Sudden neutral sodium layers : a strong link to sporadic E layers
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,757 |
Benefits of using conductive plastics in shielding configurations to reduce radiated electromagnetic interference
|
Numerical and experimental study of the shielding effectiveness of a metallic enclosure
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,759 |
An ecological study for Sri Lanka about health effects of coconut
|
Cholesterol, coconuts, and diet on Polynesian atolls: a natural experiment: the Pukapuka and Tokelau Island studies
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,811 |
An experimental study of lithium ion battery thermal management using flexible hydrogel films
|
Safety study of three types of lithium ion batteries
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,815 |
[Invasion of Drosophila albomicans into Shanghai and areas nearby and a study on its mitochondrial DNA polymorphism].
|
Cold tolerance and metabolic rate increased by cold acclimation in Drosophila albomicans from natural populations.
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 793,816 |
To Reform the Trial Mode of Minor Children-related Family Cases
|
Because the minor children-related family cases are relevant with its family issues and specific characteristics concerning the minor children,if we adopt the model of adversarial system,it may intensify the conflicts and contradictions of the parties involved,and even provoke them to deliver some fake information,thus,confusing the judges to make some less accurate judgments.Meanwhile,the model of inquisitorial system can provide the real information support to the judges to decide the maximum benefit of the minor children.To inject the social workers' investigation reports and set up the information feedback system will be better to fit in with the family features and assistance-needed of minor children of this type of case.
|
ABSTRACTObjectives: Minimal residual disease (MRD) is a strong prognostic factor in acute lymphoblastic leukemia (ALL), which progresses quickly and is fatal within months if untreated. This study ...
|
eng_Latn
| 793,839 |
Cochrane Review: Behavioural and cognitive-behavioural group-based parenting programmes for early -onset conduct problems in children aged 3 to 12 years.
|
The association between characteristics of fathering in infancy and depressive symptoms in adolescence: A UK birth cohort study.
|
Due to symbiotic N2 fixation, five years of elevated atmospheric pCO2 had no effect on the N concentration of plant litter in fertile, mixed grassland
|
eng_Latn
| 793,842 |
Alternative approaches for conceptualizing children's attributional styles and their associations with depressive symptoms.
|
The role of explanatory style and negative life events in depression: a cross-sectional study with youth from a North American plains reservation.
|
An instrumental variable approach finds no associated harm or benefit from early dialysis initiation in the United States
|
eng_Latn
| 793,843 |
Neural Correlates of Memories of Childhood Sexual Abuse in Women With and Without Posttraumatic Stress Disorder
|
Altered default mode network configuration in posttraumatic stress disorder after earthquake: A resting-stage functional magnetic resonance imaging study
|
Mental health of 58 Swedish men living together with their wives and preschool children
|
eng_Latn
| 793,844 |
Attenuated psychotic symptoms in children and adolescent offspring of patients with schizophrenia
|
Lifetime psychopathology in child and adolescent offspring of parents diagnosed with schizophrenia or bipolar disorder: a 2-year follow-up study
|
Lifetime psychopathology in child and adolescent offspring of parents diagnosed with schizophrenia or bipolar disorder: a 2-year follow-up study
|
eng_Latn
| 793,874 |
Middle childhood is a key transitional stage in the development of attachment processes and representations. Here I discuss the middle childhood transition from an evolutionary-developmental perspective and show how this approach offers fresh insight into the function and organization of attachment in this life stage. I begin by presenting an integrated biological model of middle childhood and discussing the neurobiological mechanisms that support the middle childhood transition. I examine the potential role of adrenal androgens, focusing on their activational effects in interaction with early exposure to sex hormones. I then discuss three insights arising from the integrated model and apply them to the development of attachment in middle childhood. I consider the changing functions of attachment in light of social competition, the emergence of sex differences in attachment, and the model's implications for the genetics of attachment in middle childhood.
|
Pseudomature behavior—ranging from minor delinquency to precocious romantic involvement—is widely viewed as a nearly normative feature of adolescence. When such behavior occurs early in adolescence, however, it was hypothesized to reflect a misguided overemphasis upon impressing peers and was considered likely to predict long-term adjustment problems. In a multimethod, multireporter study following a community sample of 184 adolescents from ages 13 to 23, early adolescent pseudomature behavior was linked cross-sectionally to a heightened desire for peer popularity and to short-term success with peers. Longitudinal results, however, supported the study's central hypothesis: Early adolescent pseudomature behavior predicted long-term difficulties in close relationships, as well as significant problems with alcohol and substance use, and elevated levels of criminal behavior.
|
Adenomyoepithelioma is thought to be a low-grade malignancy, and cases showing malignant behavior are rare.
|
eng_Latn
| 793,896 |
Youth substance use related problems are increasingly common, and families experience considerable stress in attempting to cope with these problems. A pilot study of 34 Australian parents from 21 families (38% sole parent families) participating in an 8-week group program, designed to assist families recover from youth substance use related problems, provided the context to explore family change processes. Participants reported a number of significant improvements over the course of the four groups that ran from late 2003 and through 2004. Regression analyses found general support for the program logic model in identifying significant associations between program-targeted parent changes and post-program improvements in stress symptoms and cohesive family behaviors. The study's limitations are noted.
|
Alcohol and substance dependency are complex, problematic phenomena, which are growing worldwide. In particular, drug use and abuse among young people is a significant concern. Although addiction p...
|
Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights.
|
eng_Latn
| 793,920 |
Interparental Violence and Children's Long-Term Psychosocial Adjustment: The Mediating Role of Parenting Practices
|
Subject to file availability and provided the posting includes a prominent statement of the full bibliographical details, a copyright notice in the name of the copyright holder (Cambridge University Press or the sponsoring Society, as appropriate), and a link to the online edition of the journal at Cambridge Journals Online.
|
XI 1: Introduction 1 1.1 Background 1 1.1.1 Childhood injuries – the New Zealand context 3 1.2 Statement of the Problem 3 1.3 Statement of Purpose 5 1.3.1 The context for the study 5 1.3.2 State research question 6 1.3.3 Study aims 6 1.4 Significance of Research 7 1.4.1 Potential benefits to childhood research 7 1.4.2 Study delimitations 8 1.5 Thesis Structure Chapter Overview 9 2: Literature Review 11 2.
|
eng_Latn
| 793,922 |
Physical Abuse and Burden of Care on Families of the Mentally Ill
|
As the proportion of patients with serious mental illness who are cared for at home increases due to hospital cost-containment pressures, so does the burden on these patients' families. This Australian study examined the prevalence of abuse experienced by family or other nonprofessional caregivers of …
|
The existence of a treatment-custody conflict in people changing institutions that derives from the need of administrators o f these facilities to maintain organizational stability and control her caused correctional officers to stress the use of authority over treatment concerns. The focus here is the extent that custodial responsibilities (use of authority to gain inmate compliance) causes ambiguous and conflicting role definitions for correctional officers.
|
eng_Latn
| 793,926 |
Does biomarker information impact patients’ preferences for therapy?
|
6527 Background: Biomarker information can risk stratify patients based on potential for benefits/toxicity from therapy. Ideally, a biomarker will identify those who benefit with limited toxicity. ...
|
Abstract The purpose of this study was to investigate the choice of friendship 5-6 year olds attending preschool make based on variables of their choice of playmates, aggression, prosocial behaviour, and victimisation. For the study, teachers completed the Prosocial Behaviour and Aggression sub-scales of the Child Behaviour Scale and the Peer Victimisation Scale, based on their eight-month general observation of the children. The Picture Sociometry Scale was applied to children individually by the researchers. The Linear Regression Analysis technique was used to establish the predictive effect aggression, prosocial behaviour, victimisation, and choice of playmates had on the choice of friends
|
eng_Latn
| 793,927 |
Parental Overprotection, Perceived Child Vulnerability, and Parenting Stress: A Cross-Illness Comparison
|
The current study sought to investigate differences in parenting capacity variables across four disease groups. Parents (N = 425), the majority of whom were mothers, of children with either cancer, asthma, Type 1 diabetes, or cystic fibrosis, completed measures of parental overprotection, perceived child vulnerability, and parenting stress. After controlling for significant demographic variables, parents of children with cystic fibrosis and asthma reported higher perceived child vulnerability than parents of children with either diabetes or cancer, while parents of children with asthma and diabetes reported higher parenting stress than parents of children with cancer or cystic fibrosis. No differences between disease groups were found for parental overprotection. The current study provides support for an illness-specific approach to understanding parenting capacity variables in the context of childhood chronic illnesses.
|
XI 1: Introduction 1 1.1 Background 1 1.1.1 Childhood injuries – the New Zealand context 3 1.2 Statement of the Problem 3 1.3 Statement of Purpose 5 1.3.1 The context for the study 5 1.3.2 State research question 6 1.3.3 Study aims 6 1.4 Significance of Research 7 1.4.1 Potential benefits to childhood research 7 1.4.2 Study delimitations 8 1.5 Thesis Structure Chapter Overview 9 2: Literature Review 11 2.
|
eng_Latn
| 793,930 |
Organizational Impacts on the Secondary Traumatic Stress of Social Workers Assisting Family Violence or Sexual Assault Survivors
|
This research examines the influence of organizational characteristics on secondary traumatic stress of social workers who provide direct services to survivors of family violence or sexual assault. The sample (n = 154) was recruited through the National Association of Social Workers' member list. The study found that social workers who received more support from their coworkers, supervisors, and work teams demonstrated lower levels of secondary traumatic stress. Social workers who also had more access to their organizations' strategic information exhibited lower levels of secondary traumatic stress. Several implications for social work administrators are suggested based on the findings.
|
Illustrations Introduction Setting the Scene: The Historical and Legal Background Developments in the Voluntary Sector Pressure for Government Action Legislation Takes Shape The First Years of Legally Sanctioned Adoption Government Action on the Adoption Societies The Second World War and its Aftermath Chapter Eight Final Conclusions Biographical Notes Bibliography Index
|
eng_Latn
| 793,933 |
The Effect of Incarceration on Urban Fathers’ Health
|
This study examines the effects of incarceration on the health of urban fathers. Using the Fragile Families and Child Well-Being Study, which surveys parents in 20 large U.S. cities across the country, the relationship between fathers' incarceration patterns and health status was examined while controlling for poor preexisting health and individual impulsivity. Findings indicate that fathers who have previously been incarcerated at some time are markedly more likely to rely on medications for physical or mental health problems, whereas recently incarcerated repeat offenders have reduced odds of being in poor health relative to those who have never been to prison. Improvements in health among recently incarcerated repeat offenders relative to those who have not been incarcerated may be related to prison health care and the overall disadvantaged circumstances of these fathers.
|
Objective ::: To examine cross-informant agreement and whose information (parents, teachers, children) about childhood bullying and victimization carry the strongest weight to late adolescent psychiatric outcome. The importance of frequency of bullying in such predictions is addressed.
|
eng_Latn
| 793,935 |
Becoming and being a parent in a situation of precarity
|
Precarity is a condition that has consequences when becoming or being a parent. Usually, it is the adverse consequences that are emphasized. The category of “precarity” is often used to pass judgement, rather than to understand or explain. For this reason, we conducted a literature review. After defining the terms “precarity” and “parenting,” we put forward an examination of parental identity, and the specific consequences of precarity on the process of parenting : becoming a parent as a sensitive life-stage, a lesser engagement in parenting, stereotypes of gender and parenting styles, and a symbolic precarity that compounds economic precarity. Finally, we explore potential avenues for intervention to support parents who may be marginalized by this socially ascribed label, and we make recommendations for areas of future research.
|
As the proportion of patients with serious mental illness who are cared for at home increases due to hospital cost-containment pressures, so does the burden on these patients' families. This Australian study examined the prevalence of abuse experienced by family or other nonprofessional caregivers of …
|
eng_Latn
| 793,936 |
Self-esteem in parents of children abducted by the other parent
|
Abstract This article presents findings from a study of 371 parents who experienced child-loss due to abduction by the other parent, a growing phenomenon recently estimated to occur 350,000 times a year. The analysis reported here examined the influence on parental self-esteem of selected parental characteristics and variables associated with the circumstances surrounding abduction. Recovery of the abducted child was found to be an important contributing factor to the self-esteem of parents who had experienced abduction, and the implications of that finding are discussed.
|
Objective:To explore the correlation between mental health and family environment of preliminary students in junior middle school.Methods: Choose preliminary students from 9 middle schools of Shanghai;and use the middle school student mental health scale(MSSMHS) and family environment scale Chinese version(FES-CV) to value their mental health and family environment.Results:There were 35% students whose MSSMHS total scores were over 2 point,And the boys problems were more than the girls'.The familiarization,organization and success factor got high scores in FES-CV,while illogicality and amusement factor with low scores.Intimate degree and amusement are important factors that affect the mental health of students.Conclusion: We should pay more attention on their mental healthy condition.Family therapy may be a good intervention to help them.
|
eng_Latn
| 793,939 |
Factors Influencing Parental Engagement in a Community Child and Adolescent Mental Health Service: A Qualitative Comparison of Completers and Non-Completers
|
Attrition is a significant problem in child mental health services. Research investigating the factors associated with attrition has produced conflicting results, and failed to consider clients' own decision to terminate treatment prematurely. This study investigated parental accounts of why they completed or discontinued treatment. Completers and non-completers were interviewed using an open-ended interview schedule. All completed the Strengths and Difficulties Questionnaire (SDQ) before beginning treatment, but the sample size was too small to yield meaningful results. Core differences were found in the accounts of parents who completed treatment and parents who discontinued treatment. Completers' accounts were more focused on the child's problem and identified more factors that facilitated the effectiveness of the intervention; whereas non-completers' accounts were more focused on family problems and identified more obstacles that interfered with the effectiveness of the intervention. The findings have...
|
This article from research quality student's psychological characteristic obtaining,has analyzed the quality student's personality characteristic,and how on consummates its personality practically,from the family,the school,the social three aspects has made the explanation.
|
eng_Latn
| 793,941 |
The Implications of Female Risk Factors for Substance Abuse Prevention in Adolescent Girls
|
SUMMARY Trends in substance abuse prevention have not adequately addressed the needs of girls and female adolescents. The precursors to substance use and abuse in adolescence are analyzed specifically from a gender-specific perspective. Female drug use as both a maladaptive and adaptive pattern of coping behavior is examined within a socio-cultural context. This new understanding points to the need for alternative models of prevention with particular attention to risk, resiliency and protective factors. The expanded role of the family therapist as “Family Life Cycle Specialist” within a prevention model will be highlighted.
|
The primary purpose of the study is to find out the socio-economic demographic and health variables influencing the family planning acceptance in the thirty newly formed districts of Orissa. The study seeks to answer the following questions. What is the dominant set of variables influencing the family planning performance during a given period of time in the districts of Orissa? What are the direct and indirect effects of these variables on the Couple Protection Rate (CPR) in the districts of Orissa? What are the joint effects of these variables on the CPR in the districts of Orissa? (excerpt)
|
eng_Latn
| 793,943 |
Does a Close Relationship With an Adult Reduce the Risk of Juvenile Offending for Youth With a History of Maltreatment
|
Social support is frequently cited as a protective factor against juvenile offending. The current study examined whether a close relationship with an adult in childhood decreases the risk for offen...
|
Abstract This study was conducted to assess the accuracy of perceptions of others’ self-esteem and to examine the potential moderating variables of target gender, perceiver gender, and degree of acquaintance. Degree of acquaintance was the only hypothesized moderator reliably related to accuracy. An overall tendency to overestimate targets’ self-esteem was evinced, but was not related to any of the hypothesized moderators. The data suggested that perceivers are influenced by a false consensus effect when estimating others’ level of self-esteem, independent of their degree of acquaintance with targets. Implications of the findings and directions for future investigation are discussed.
|
eng_Latn
| 793,944 |
Socioeconomic factors in EU-funded studies of children’s environmental health
|
We performed a survey on socioeconomic factors in 27 studies of children’s environmental health funded by EU FP4 and FP5. Parental education was the most common measure (74%). Socioeconomic factors were predominantly considered as confounder (74%) and less often as effect modifier (33%) or independent variable (37%). The awareness of the need to study the impact of socioeconomic factors further seems to have increased in recent years.
|
The decision to access healthcare resources and psychiatric treatment may be impacted by information provided in the external environment. For messages about depression, how and where messages are ...
|
eng_Latn
| 793,946 |
Perceptions of Participating in Longitudinal Trauma Research among Women Exposed to Intimate Partner Abuse
|
we examine motivations for, and costs/benefits of, participation in three interviews across a one-year period among women recently exposed to intimate partner abuse (IPA). Recruited from publicly accessible police reports, women were not informed that the study focused on IPA in recruiting materials or when they scheduled the first interview. Women ' s ratings on the Response to Research Participation Questionnaire (RRPQ) indicated a positive benefit-to-cost ratio across all three interviews. Negative responses to participation as well as severity of IPA and PTSD symptoms did not predict retention at the next interview. These data dem - onstrate that studies asking about IPA experiences, even when survivors do not know in advance that IPA will be the focus of study, can be implemented within a stable benefit-to-cost ratio over time.
|
XI 1: Introduction 1 1.1 Background 1 1.1.1 Childhood injuries – the New Zealand context 3 1.2 Statement of the Problem 3 1.3 Statement of Purpose 5 1.3.1 The context for the study 5 1.3.2 State research question 6 1.3.3 Study aims 6 1.4 Significance of Research 7 1.4.1 Potential benefits to childhood research 7 1.4.2 Study delimitations 8 1.5 Thesis Structure Chapter Overview 9 2: Literature Review 11 2.
|
eng_Latn
| 793,947 |
Examining Dose–Response Relationships Between Childhood Victimization, Depression, Symptoms of Psychosis, and Substance Misuse for Incarcerated Women
|
The current study uses the dose–response model to examine the relationships between childhood victimization events and subsequent depression, symptoms of psychosis, and substance misuse in a sample of 230 randomly selected incarcerated women in the United States. Results on the frequency of victimization were mixed. In this sample, both frequency of physical abuse and frequency of sexual abuse significantly predicted current symptoms of psychosis, but only frequency of physical abuse significantly predicted substance misuse. Incarcerated women who experienced multivictimization were 5.7 times as likely to report depression, 4.2 times as likely to report current symptoms of psychosis, and 3.8 times as likely to meet criteria for a substance use disorder. Results indicate that adjusting prison-based interventions to address multivictimization may improve outcomes and reduce recidivism among this population.
|
Objective:To explore the correlation between mental health and family environment of preliminary students in junior middle school.Methods: Choose preliminary students from 9 middle schools of Shanghai;and use the middle school student mental health scale(MSSMHS) and family environment scale Chinese version(FES-CV) to value their mental health and family environment.Results:There were 35% students whose MSSMHS total scores were over 2 point,And the boys problems were more than the girls'.The familiarization,organization and success factor got high scores in FES-CV,while illogicality and amusement factor with low scores.Intimate degree and amusement are important factors that affect the mental health of students.Conclusion: We should pay more attention on their mental healthy condition.Family therapy may be a good intervention to help them.
|
eng_Latn
| 793,949 |
Bullying Harms Victims And Perpetrators of All Ages.
|
Bullying used to be considered an unfortunate, inevitable rite of childhood, but researchers now tell us that bullying often occurs in conjunction with more serious aggressive and antisocial behavior. They conclude that bullying, therefore, should not be considered a normal and accepted part of growing up.
|
XI 1: Introduction 1 1.1 Background 1 1.1.1 Childhood injuries – the New Zealand context 3 1.2 Statement of the Problem 3 1.3 Statement of Purpose 5 1.3.1 The context for the study 5 1.3.2 State research question 6 1.3.3 Study aims 6 1.4 Significance of Research 7 1.4.1 Potential benefits to childhood research 7 1.4.2 Study delimitations 8 1.5 Thesis Structure Chapter Overview 9 2: Literature Review 11 2.
|
eng_Latn
| 793,950 |
The Firstborn Phenomenon Among Psychiatric Residents
|
There has been a reawakening of interest in the study of birth order. Investigations have shown a significant preponderance of firstborn children in such areas as medical school. They have also shown that firstborns have a greater achievement level and different personality characteristics than other children. In support of this, the authors present their findings of residents' responses to a questionnaire regarding their training; of 160 subjects who responded, 92 were firstborn children.
|
We thank Daniels and colleagues for their comments on our report ([1][1]). Given that the Cleveland Clinic is the main referral center of patients with germline PTEN mutations in the United States, it is certainly possible that ascertainment bias may exist, an issue we acknowledged in our report.
|
eng_Latn
| 793,967 |
Paying Attention In The Postpartum Period
|
When a new baby comes home, there's a lot to pay attention to. So much so that the mother's needs are often overlooked. "Conservative estimates say 11 percent of women become depressed at some point in their first year of motherhood; others put that figure at closer to 25 percent. And that's just the women who seek help. Likely, the numbers are greatly undercounted — according to one study, fewer than 15 percent of moms who had symptoms of PPD actually got help," HuffPost reports. Mental health treatment after delivery is important, but the condition is often misunderstood. Now, with a drug for treating postpartum depression in the trial phase, is the stigma of "baby blues" about to be broken?
|
Hear reaction to the program's "Back to School" focus on education issues, and from a woman who says, after listening to the <em>Mocha Moms</em>, she's afraid of becoming "mommy-tracked" from her career. Plus, hear how listener comments led to a special <em>BackTalk</em> history lesson.
|
eng_Latn
| 793,970 |
First-time mothers at risk of mental illness, study finds
|
First-time mothers are at increased risk for mental disorders while fathers do not share that risk, Danish researchers said on Tuesday.
|
CAPE CANAVERAL -- NASA does not conduct psychological evaluations of its astronauts but will reconsider that policy following the apparent meltdown of Lisa Nowak, charged with attempted murder in Florida, agency officials said Wednesday.
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eng_Latn
| 793,986 |
Is there an evidence-based study regarding the long-term psychological effects of spanking?
|
Are there any reputable studies on spanking?
|
Are there any reputable studies on spanking?
|
eng_Latn
| 794,013 |
Mental health in Swedish children living in joint physical custody and their parents' life satisfaction: A cross-sectional study
|
Risk for psychopathology in the children of depressed mothers: A developmental model for understanding mechanisms of transmission
|
Semi-supervised Log Pattern Detection and Exploration Using Event Concurrence and Contextual Information
|
eng_Latn
| 794,050 |
early maladaptive schemas and child and adult attachment : a 15 - year longitudinal study .
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attachment styles among young adults : a test of a four - category model .
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Auditory dysfunction in schizophrenia: integrating clinical and basic features
|
eng_Latn
| 794,055 |
is sympathy pain true
|
Periodically I've heard stories of women whose male partners suffered what have been deemed sympathy pains while the women were pregnant.
|
Although sympathy is a well-known term, the implications of sympathy found in the study of human behavior are often less clear. Decision-making, an integral part of human behavior, involves the weighing of costs with potential outcomes.
|
eng_Latn
| 794,091 |
age kids know between wrong and right
|
A 2-year-old, it turns out, knows the difference between right and wrong. According to psychologist Judi Smetana, the sense of morality begins to develop early in humans. And by the time children are 3 to 4 years old, they recognize certain behaviors â such as hitting â as wrong, even when no one is watching, says Smetana, a professor at the University of Rochester.
|
Children are born to know right from wrong, new research shows. Children have an inbuilt sense of right and wrong, researchers claimed last night. The study, which showed children are 'hard-wired' to feel empathy, is likely to rekindle the nature-or-nurture debate and may cast light on the causes of bullying.
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eng_Latn
| 794,095 |
what is child study
|
Child Study. Child study, also called paidology or experimental pedagogy, was the attempt to apply the methods of modern science to the investigation of children in order to discover the laws of normal child development.
|
Child psychology is a branch of psychology that focuses on children from infancy through adolescence. A wide variety of topics within psychology are encompassed by this discipline, including abnormal psychology, social psychology, developmental psychology, and so forth.hild psychology is a branch of psychology that focuses on children from infancy through adolescence. A wide variety of topics within psychology are encompassed by this discipline, including abnormal psychology, social psychology, developmental psychology, and so forth.
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eng_Latn
| 794,096 |
Study on Raise the Juice Yield of Ruo Qiang Hui Zao by Emzymatic
|
Based on the result of single factor and orthogonal test,chose pectase,juice emzyme and acidic pectase as the enzyme sources to study,and determined the best enzymolysis conditions.The result showed that the optmium conditions were pectase usage 0.04 %,juice emzyme 0.04 %,temperature 55 ℃,pH 3.5,The juice yield could reach 93.81 % under this condition.
|
There is a long history to immerge science into humanities in China. To the topic or tradition, the systematical and deep studies are still of importance to hold the relation between science and humanities today. The work Science in Eastern Zhejiang School in Qing Dynasty written by Dr. Yang Xiaoming is just a typical case study in the field.
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eng_Latn
| 794,125 |
Structure of the Acid-Stable Core-Polysaccharide Derived From the Seed Mucilage of Ocimum Basilicum
|
Optimisation study of gum extraction from Basil seeds (Ocimum basilicumL.)
|
Flow behavior, thixotropy, and dynamic viscoelasticity of ethanolic purified basil (Ocimum bacilicum L.) seed gum solutions during thermal treatment
|
eng_Latn
| 794,135 |
Techno-economic feasibility of off-grid solar irrigation for a rice paddy in Guilan province in Iran: A case study
|
Rice yield estimation based on forecasting the future condition of groundwater salinity in the Caspian coastal strip of Guilan Province, Iran
|
Oral spray wintertime vitamin D3 supplementation has no impact on inflammation in Gaelic footballers
|
eng_Latn
| 794,165 |
The toxicity of nitrotoluenes to guppy
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Acute toxicity, subacute toxicity and joint toxicity of 2,6-dinitrotoluene and 4-nitrotoluene to guppy was determined. It would give credible foundation to constitute or perfect water quality standard for fisheries. The results showed that the values of 96 h LC50 of 2,6-dinitrotoluene and 4-nitrotoluene were (25.22±0.19) mg/L and (60.26±0.09) mg/L. Then, the two nitrotoluenes affected upgrowth of guppy in 40 days differently and the joint toxicity of 2,6-dinitrotoluene and 4-nitrotoluene was synergistic effect in 96 h.
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Abstract Not Available – First paragraph follows: ::: Previous field studies of soil fertility effects on the processing quality of tomatoes have been inconclusive. To adequately assess the relationship of various nutrients to fruit quality, it is necessary to more closely control the nutrition of the plant. Therefore, techniques were developed and a series of experiments were initiated in the greenhouse to study the effect of individual nutrients on pH, soluble solids, and color, as well as on yield. This article analyzes the effect of one nutrient–nitrogen–on tomato processing quality.
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eng_Latn
| 794,263 |
Nitrogen: In relation to tomato quality
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Abstract Not Available – First paragraph follows: ::: Previous field studies of soil fertility effects on the processing quality of tomatoes have been inconclusive. To adequately assess the relationship of various nutrients to fruit quality, it is necessary to more closely control the nutrition of the plant. Therefore, techniques were developed and a series of experiments were initiated in the greenhouse to study the effect of individual nutrients on pH, soluble solids, and color, as well as on yield. This article analyzes the effect of one nutrient–nitrogen–on tomato processing quality.
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Abstract The increase in hyperfine splitting constant of nitroxide, due to hydrogen bond formation between the NO group of the radical and the solvent molecule is shown to be proportional to the concentration of the proton donor groups in solution. In mixtures of protic solvents their contributions are additive.
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eng_Latn
| 794,266 |
Study on the Extracting Conditions of Flavonoid from Tea by Response Surface Methodology
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This paper deals with the study on the extracting conditions of flavonoid from tea.Response surface methodology was used to obtain the optimum extracting conditions by Design-Expert 6.0.The research findings show that the optimum extracting conditions were as follows:extracting 60 min,water temperature 80℃,60%alcohol,10 times volumes.
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Abstract A new approaoh to dispersion identification of nonlinear plants is introduoed. Conditional and unoonditional moment first and seoond order oharaoteristics of stoohastio prooesses are obtained from subjective'probability. This signifioantly expands the use of oorrelational and dispersion identifioation methods. Soundness of the subjeotive-probabilistic approach is proved,subjective dispersion functions are determined from a priori and a posteriori information as are recurrence forms of the characteristics introduced. For identifioation of nonliniar plants new results are introduced,dispersion identification equations and quantitative estimates of the nonlinearity degree.
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eng_Latn
| 794,276 |
Discussion on The Relation of Agricultural Modernization and Agricultural Sustainability
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The relation of agricultural modernization and agricultural sustainability is not that of contradition or substitution, but complementation. In the 21st centruy, the great goal of Chinese agriculture is to achieve agricultural modernization by way of Intensive Sustainable Agriculture.
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This article reviewed the research status of wild edible fungi preservation technology,proposed the key of preservation and development trend,which will provide reference for the further study in the future.
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eng_Latn
| 794,289 |
Corrosion inhibition experiments in liquid lithium
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Abstract The use of common structural alloys with pre-formed aluminide diffusion surface coatings is one approach proposed to inhibit corrosion by lithium. This study involved exposing commercially coated and uncoated ferritic and austenitic alloys to pure liquid lithium, in a 400°C recirculation loop, to determine the stability of the treated materials. Detailed metallographic analysis provided results for an initial screening of the test materials for future applications and testing.
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The influence of cultural liquid of bacteria , Bacillus coagulans TI on the growth of several crops are studded. It was established that during the submerged cultivation on glucose-peptone medium these bacteria form gibberellins and amino acids. Pre-sowing treatment of seeds with diluted cultural liquid causes the stimulation of plants growth and improves the quality of plant biomass.
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eng_Latn
| 794,305 |
Comprehensive Evaluation of New Sugarcane Lines Yunrui 06 Series by DTOPSIS
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The new sugarcane lines of Yunrui 06 series were evaluated by the method of Dynamic Technique for Order Preference by Similarity to Ideal Solution(DTOPSIS) in this study.The results showed that,with excellent comprehensive characters,varieties Yunrui06-241,Yunrui06-1717,Yunrui06-2921,Yunrui06-6032,Yunrui06-2417,Yunrui06-6021 and Yunrui06-2885,could be considered to further propagate and popularize application.
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This paper briefly analyzed the reforming state and solid influence of the collectivity forest-property of Yong'an city,through investigating the changing of forest property right in abroad and hometown at the present.It will provide the practised reference for the reforming of the collectivity forest-right in Fujian's province.
|
kor_Hang
| 794,310 |
Herbalism,botany and components analysis study on original plants of frankincense
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In order to clarify original plants of traditional Chinese medicine(TCM) frankincense,a GC method for determination essential oils and a HPLC method for determination boswellic acids were carried out together with analysis of herbalism,botany,components and pharmacology papers of frankincense.It was concluded that original plants of TCM frankincense include at least Boswellia sacra,B.papyrifera and B.serrata.
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With the improved comparison method of comprehensive competitiveness,in this paper an empirical analysis of the competitiveness of crop production in Jiangsu was made.The crops that had advantage and disadvantage compared with other areas of the country were found.Thus the improvement direction of crop production structure was pointed out.
|
eng_Latn
| 794,314 |
Adulteration of mustard cooking oil with argemone oil: do Indian food regulatory policies and antioxidant therapy both need revisitation?
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Consumption of adulterated mustard oil (Brassica nigra) with argemone oil (Argemone mexicana) even for a short duration leads to a clinical condition referred as epidemic dropsy. In humans, argemone oil contained in adulterated mustard oil causes oxidative stress and death of red blood cells via met-hemoglobin formation by altering pyridine nucleotide(s) and glutathione redox potential. Argemone oil contamination poses a serious threat to human health and should be checked by appropriate regulatory measures. Antioxidant therapy provides symptomatic relief and should be seriously considered for therapeutic interventions against argemone oil toxicity.
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The present study aimed to analysis the aftermath of science learning based on an integrated scientific approach to local potential, onion agriculture, towards the science process skill of 7th grade of junior high school students. The study was a quasi-experimental research with non-equivalent control group design. The object of this experiment was all classes in the 7th grade of Wedarijaksa 2 junior high school. Cluster random sampling was used to gather the sample, as the result, two over seven classes were randomly chosen. Data that be used in the research were the result of science process skill test. Data were analyzed using One-way Anova. The result shows that there is a significant impact of science learning based on scientific approach to local potential, in this case is onion agriculture, towards process science skill of the students.
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eng_Latn
| 794,316 |
Effect of Fermened Cake on Nutrients and Quality of Potato
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The effect of fermented cake on nutrients and quality of potato in sandy soil was studied.The results showed that fermented cake could enhance accumulation of nitrogen and potassium in plants,compared to the traditional fertility,the yield could increase by 8.16%～24.47%,the starch content could reach 14%～16%.It indicated that the fermented cake had the function of increasing the yield and quality of potato.
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The present study aimed to analysis the aftermath of science learning based on an integrated scientific approach to local potential, onion agriculture, towards the science process skill of 7th grade of junior high school students. The study was a quasi-experimental research with non-equivalent control group design. The object of this experiment was all classes in the 7th grade of Wedarijaksa 2 junior high school. Cluster random sampling was used to gather the sample, as the result, two over seven classes were randomly chosen. Data that be used in the research were the result of science process skill test. Data were analyzed using One-way Anova. The result shows that there is a significant impact of science learning based on scientific approach to local potential, in this case is onion agriculture, towards process science skill of the students.
|
eng_Latn
| 794,322 |
Magnetic solid phase extraction of non-ionic surfactants from water
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Magnetic solid phase extraction was tested for the preconcentration of non-ionic surfactants based on oxyethylated nonylphenol, aliphatic alcohols and hydrogenated fatty acid methyl esters from water. Magnetic hydrophobic adsorbents exhibited the best extraction characteristics. Surfactants with the middle oxyethylation level were extracted efficiently while the extraction of surfactants with low and high oxyethylation levels was very low.
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Abstract The objective of this study was to evaluate the chemical and physical characteristics of fresh egg pasta samples obtained by using two different production methodologies: extrusion and lamination. The results of the study demonstrate that products have different characteristics in terms of colour and level of gelatinization, while they do not show significant differences with regard to the amount of absorbed water during the cooking stage. It was evaluated that it is possible to discriminate the two kinds of products by using FT-NIR spectroscopy. FT-NIR analysis results suggest the presence of a different matrix–water association, a diverse level of starch gelatinization and a distinct starch–gluten interaction in the two kinds of pasteurised samples.
|
eng_Latn
| 794,333 |
Screening of a Flocculant-producing Strains and Optimization on Its Cultural Conditions
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Objective:To separate the floccu lant-producing bacteria with a high activity from aerobic activated sludge.Method:five strains were isolated from activated sludge.After prescreening strain Bacillus F1 with high flocculating activity was obtained.Take strain F1as the object of study,determines its fermentation fluid to the kleit suspension flocculation rate.Result:The optimum carbon and nitrogen sources are soluble starch and peptone,primary pH 7.0,the best shaking speed was 120r/min.35℃,cultivated for 72h in flakes.The strain produces a strong-activity flocculants with flocculating rate of 90 % against kaolin clay suspension.
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The practice of running a bilingual experimental class based on the first-level discipline of materials science and engineering in Nanjing University of Technology is introduced in this paper.The cultivation of innovative talents was realized through establishing a set of innovative training program,relying on a team of frontier teachers,using a flexible form of teaching organization,establishing a flexible cultivation system,cultivating an international professional thinking mode,developing a batch of characteristic courses,etc.
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eng_Latn
| 794,335 |
Optimization of a high-pressure pore water extraction device.
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High-pressure squeezing is a technique used for the extraction of the pore water of porous materials such as sediments, soils, rocks, and concrete. The efficiency of extraction depends on the maximum pressures on the materials. This article presents the design of a high-pressure device reaching an axial pressure of 1000 MPa which has been developed to improve the efficiency of extraction. The increase in squeezing pressure implies high stresses inside the chamber, so specialized expertise was required to design a safe, functional device that could withstand pressures significantly higher than common laboratory equipment. The design includes finite element calculations, selection of appropriate materials, and descriptive construction details for the apparatus. It also includes an experimental study of the performance of the apparatus in terms of extraction efficiency.
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Objective To control the quality of Herba Leonuri by studying the content of stachydrine hydrochloride in different parts of it. Method A HPLC method was developed for the content detetmination of stachydrine hydrochloride in flower, stem, leafage from Herba Leonuri. Spherisorb SCX colum was used with mobile phase of 20 mmol/L sodium dihydrogen phosphate (containing 0.04% triethylamine and 0.15% phosphoric acid). The colum temperature was 25 ℃, the detective wavelength was 192 nm. Results Stachydrine hydrochloride content was the highest in leafage and the lowest in stem. Conclusion To ensure the quality of Herba Leonuri, it is significant to choose medical material with more leafage.
|
eng_Latn
| 794,345 |
Production temperature affects leatherleaf fern postharvest desiccation
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Leatherleaf fern [Rumohra adiamtiformis CForst.) Ching] was grown in controlled environment chambers set for day/night temperatures of 35/24C (high temperature regime, HTR) or 24/13C Clow temperature regime, LTR). Fronds were harvested for vase life studies at 1100 and 1800 HR and held in holding rooms in deionized water. Plants were then moved to a greenhouse environment (16-25C) and, after 1 week, an additional set of fronds were harvested. (...)
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This paper deals with the study on the extracting conditions of flavonoid from tea.Response surface methodology was used to obtain the optimum extracting conditions by Design-Expert 6.0.The research findings show that the optimum extracting conditions were as follows:extracting 60 min,water temperature 80℃,60%alcohol,10 times volumes.
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eng_Latn
| 794,350 |
A multiplex PCR method for simultaneous species identification and strain typification of Oenococcus oeni
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Selected starter cultures of Oenococcus oeni are widely used to initiate malolactic fermentation (MLF) in wine. Nevertheless, the inoculated culture does not always develop as expected and undesired strains can grow causing wine spoilage. Therefore, methods that can reliably differentiate O. oeni strains are essential to monitor the population dynamics of MLF. This work presents a new multiplex PCR method that allows the simultaneous species identification and strain typification of O. oeni, based on the combined use of species-specific PCR primers and a Random Polymorphic DNA (RAPD)-PCR primer. This method represents an useful tool for the control of wine MLF.
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Objective To study the best extracting technology of Compound Taizishen Granule prescription.Methods The total polysaccharides and total saponins were determined by UV spectrophotometer.With the content of total polysaccharides and total saponins as comprehensive indexes,orthogonal test was applied to investigation of the water addition,extraction time,and extraction times for optimizing the best extracting technology.Results The best extracting technology was using 10 times the amount of water,extracting 3 times and 1.5 h per time.Conclusion The extraction technology is safe and effective,which can be used as extraction for Compound Taizishen Granule prescription.
|
eng_Latn
| 794,358 |
Simulation of control and temperature variation of water density in intermediate-neutron uranium-water reactors
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This article deals with the results of experiments on the physical simulation of control and of the temperature effect due to changes in water density in intermediate-neutron uranium-water reactors. The values of control rods of different types were determined, and the dependence of the critical size of uranium-water reactors on the density of the water filling the reactor core was found.
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Abstract The objective of this study was to evaluate the chemical and physical characteristics of fresh egg pasta samples obtained by using two different production methodologies: extrusion and lamination. The results of the study demonstrate that products have different characteristics in terms of colour and level of gelatinization, while they do not show significant differences with regard to the amount of absorbed water during the cooking stage. It was evaluated that it is possible to discriminate the two kinds of products by using FT-NIR spectroscopy. FT-NIR analysis results suggest the presence of a different matrix–water association, a diverse level of starch gelatinization and a distinct starch–gluten interaction in the two kinds of pasteurised samples.
|
eng_Latn
| 794,365 |
Celsius to Fahrenheit—Quick and Dirty
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A less metally demanding approach to converting a temperature from Celsius to Fahrenheit than the standard formula is described. Even though it is not as accurate as the standard formula, with practice your relative percent error can be reduced.
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This paper deals with the study on the extracting conditions of flavonoid from tea.Response surface methodology was used to obtain the optimum extracting conditions by Design-Expert 6.0.The research findings show that the optimum extracting conditions were as follows:extracting 60 min,water temperature 80℃,60%alcohol,10 times volumes.
|
eng_Latn
| 794,368 |
Exfoliation on stainless steel and inconel produced by 0.8-4 MeV helium ion bombardment
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Abstract In order to try and outline the energy dependence of surface deformations such as exfoliation and flaking on candidate CTR first-wall materials, stainless steel and two types of inconels were bombarded by 0.8, 1 and 4 MeV helium ions. All the bombarded spots could be characterized by large exfoliations covering almost the total implanted area. No spontaneous rupture was observed except on one type of inconel where flaking took place right after reaching the critical dose. After mechanical opening of the formations, similar inner morphology was found as in our previous studies on gold [5,6].
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Objective To control the quality of Herba Leonuri by studying the content of stachydrine hydrochloride in different parts of it. Method A HPLC method was developed for the content detetmination of stachydrine hydrochloride in flower, stem, leafage from Herba Leonuri. Spherisorb SCX colum was used with mobile phase of 20 mmol/L sodium dihydrogen phosphate (containing 0.04% triethylamine and 0.15% phosphoric acid). The colum temperature was 25 ℃, the detective wavelength was 192 nm. Results Stachydrine hydrochloride content was the highest in leafage and the lowest in stem. Conclusion To ensure the quality of Herba Leonuri, it is significant to choose medical material with more leafage.
|
eng_Latn
| 794,374 |
A new analytical method for solving systems of Volterra integral equations
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In this paper, a new modified homotopy perturbation method (NHPM) is introduced for solving systems of Volterra integral equations of the second kind. Theorems of existence and uniqueness of the solutions to these equations are presented. Comparison of the results of applying the NHPM with those of the homotopy perturbation method and Adomian's decomposition method leads to significant consequences. Several examples, including the system of linear and nonlinear Volterra integral equations, are given to demonstrate the efficiency of the new method.
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Objective To optimize the extraction technology of Yanqing Granule by orthogonal test.Methods Using the contents of chlorogenic acid and total extraction as indexes,choosing solvent volume,extracting duration and extracting times as influential factors,the optimal extraction condition was studied by L9(34) orthogonal test.Results The optimal extraction condition of Yanqing Granule was: 200 mL water for 1/3 amount of drugs,refluxing extraction for 3 times and 0.5 h each time.Conclusion The optimal extraction technology obtained in this study is simple and reproducible,and it has a higher application value in the production of Yanqing Granule.
|
eng_Latn
| 794,385 |
Mapping of charged carbohydrates in chemical pulps employing conductometric titration and capillary zone electrophoresis : application and development
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Pulp samples obtained after each step in four different bleaching sequences, and a liner pulp, have been studied with respect to total fiber charge and carbohydrate composition. The study of th ...
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This chapter contains sections titled: Introduction Identification of the Best Linear Approximation Using Random Excitations Generation of Uncertainty Bounds? Identification of the Best Linear Approximation Using Periodic Excitations Advises and Conclusions ]]>
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eng_Latn
| 794,390 |
THE CORRECTION OF HYDROGEN MOLECULAR-EXCITATION TO THE 3T BETA-SPECTRUM
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Using a modified variational wave function of Michels type the second excited 1Σ state of HeH+ ion is calculated, and consequently its contribution to the tritium molecule β-spectrum is estimated. In addition to this, the source temperature effect as well as the effect of different isotopic compositions such as T2, TD and TH in the hydrogen molecules are also discussed in detail.
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Objective To control the quality of Herba Leonuri by studying the content of stachydrine hydrochloride in different parts of it. Method A HPLC method was developed for the content detetmination of stachydrine hydrochloride in flower, stem, leafage from Herba Leonuri. Spherisorb SCX colum was used with mobile phase of 20 mmol/L sodium dihydrogen phosphate (containing 0.04% triethylamine and 0.15% phosphoric acid). The colum temperature was 25 ℃, the detective wavelength was 192 nm. Results Stachydrine hydrochloride content was the highest in leafage and the lowest in stem. Conclusion To ensure the quality of Herba Leonuri, it is significant to choose medical material with more leafage.
|
yue_Hant
| 794,398 |
Extraction of Total Flavonoids From Hypericum Perforatum Based on Uniform Design Method
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Objective:To optimize the extraction technology of the total flavonoids from Hypericum perforatum.Methods:Selecting the contents of total flavonoids from the extractsolution as the target,the conditions of extraction were optimized by the uniform design method.Results:The optimum extraction technology was as follows:solid-liquid ratio 1∶10,90% ethanol,refluxing and extracting for 60 min,2 times.The total flavonoids in Hypericum perforatum was 9.12%.Conclusion:This optimized process is simple,stable and efficient.
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The article discusses the results of a study published in the June 2012 issue of periodical "Current Biology" by biologist Harry Klee and colleagues about how fragrant compounds contribute to flavor in tomatoes. Topics include distinctions between ordinary supermarket tomatoes and heirloom varieties, how the volatile compound geranial enhances tomato flavor, and the results of a taste-test experiment.
|
eng_Latn
| 794,419 |
Physical properties and water state changes during storage in soy bread with and without almond
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Soy bread was formulated to impart different isoflavone profiles by addition of almond: a natural source of β-glucosidase. In this study, the influence of almond powder on loaf quality and storage stability of soy bread was investigated using thermal analysis, texture, loaf volume and air cell imaging techniques. Lipids introduced with the almond fraction, served as mediators to strengthen the interaction between wheat and soy protein, thereby increasing dough extensibility. Loaf quality of the almond soy bread was therefore improved since the collapse of air cells during bread preparation was prevented. This in turn favored better loaf quality. Additionally, water binding strength and changes thereof during storage, probed by thermal analysis, were found to significantly hinder the staling rate during prolonged storage of soy-containing breads.
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Question about classification of ground water quality was studied by using Self-organizing Feature Map(SOM) method,taking Yujiagou area polluted by leachate of abandoned open-pit coal mine of Xinqiu in Fuxin as example.The water quality of 17 wells in the area polluted were classified in different degrees with different train epochs by using correlation functions in MATLAB and area polluted was determined.It is indicated by studied results that main party of grand water in Yujiagou area has been polluted and can not be drunk,and the results of classification is identical comparing with comprehensive index method,fuzzy comprehensive appraisal and grey associated analysis etc.,and application of SOM in classification of ground water quality is feasible.
|
eng_Latn
| 794,420 |
Temperature dependence of the photoinduced EL2*→EL20 recovery process observed by infrared absorption
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The infrared absorption technique is used to measure the photoinduced recovery of the EL2 defect from its metastable state (EL2*) to its normal state (EL20) in semi‐insulating GaAs. This recovery is induced by irradiating photoquenched samples with 0.90 or 1.46 eV light for 60 min at various temperatures between 10 and 110 K. The recovery process is found to be highly temperature and sample dependent. It is concluded that the results are related to the presence of other defects and impurities (traps) which interact with EL2 at low temperatures.
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This paper deals with the study on the extracting conditions of flavonoid from tea.Response surface methodology was used to obtain the optimum extracting conditions by Design-Expert 6.0.The research findings show that the optimum extracting conditions were as follows:extracting 60 min,water temperature 80℃,60%alcohol,10 times volumes.
|
eng_Latn
| 794,452 |
Effects of Cellulose Based Edible Coating on Shelf-Life of Kinnow
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Cellulose based edible coating - carboxy methyl cellulose of various concentrations (0.5, 1.0 and 1.5%) were tried on fresh kinnow fruits in order to extend the marketing period. Coating was applied by immersion method. Coated and uncoated kinnows were stored in open tray, low density and high density polyethylene bags (200 gauge) under ambient conditions (during the period of experiment, the temperature and relative humidity varied from 18–28°C abd 55–65 percent respectively). It was found that the carboxy methyl cellulose (0.5%) coating on kinnow and packed in high density polyethylene bags extended the shelf-life of kinnow upto 40 days without adversely affecting the quality.
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The paper introducess the implemented conditions which colling recycle of flexible base on Ying-DaLine.It over all xpounds the investigation of road condlitions of original pavement,indoor trial study,determination of trial lot plan as well as completion of trial lot etc.
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eng_Latn
| 794,454 |
Gas Treatment for the Control of Blue Mold Disease of Tobacco.
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Recommends the use paradichlorbenzene gas for treatment of blue mold disease of tobacco, and provides instructions for using it.
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High Sulfur Indiana V coal was solvent refined in a bench scale unit to determine operating conditions necessary to produce low ash product with less than 0.9 wt% S. Necessary background information was generated prior to recommending further processing of this coal at the Wilsonville SRC pilot plant. North Dakota lignite was processed in the same unit to determine its suitability for further study at the pilot plant level. Three sets of operating conditions utilizing three different mixtures of carbon monoxide and hydrogen were evaluated. On the basis of these results, further testing of lignite at Wilsonville was deferred. The report summarizes operability information and product distribution data, hydrogen, carbon monoxide and water consumption, as well as elemental analyses of products and product fractions.
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eng_Latn
| 794,456 |
Preparation of TTO/UF resin microcapsule via in-situ polymerization and modeling of its slow release
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For slow release of tea tree oil (TTO), TTO were encapsulated by urea-formaldehyde (UF) resin via in-situ polymerization. The effects of curing time and drying condition on particle size, a...
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Objective To study the best extracting technology of Compound Taizishen Granule prescription.Methods The total polysaccharides and total saponins were determined by UV spectrophotometer.With the content of total polysaccharides and total saponins as comprehensive indexes,orthogonal test was applied to investigation of the water addition,extraction time,and extraction times for optimizing the best extracting technology.Results The best extracting technology was using 10 times the amount of water,extracting 3 times and 1.5 h per time.Conclusion The extraction technology is safe and effective,which can be used as extraction for Compound Taizishen Granule prescription.
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eng_Latn
| 794,469 |
Study on Low Temperature Pectinase on Clarification of Banana Juice Effect
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Low temperature pectinase has the character of the mild,clarify the characteristics of good effect,less dosage. It had remarkable effect in fruit juice.In this paper,we got the following conclusion through single factor and orthogonal experiment:the optimum technological conditions were as follows,the dosage of the low temperature was 6 U/100 m L,the time was 60 min,the temperature was 20 ℃,the clarification of the banana juice can reach 95.7 %.
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Objective To study the best extracting technology of Compound Taizishen Granule prescription.Methods The total polysaccharides and total saponins were determined by UV spectrophotometer.With the content of total polysaccharides and total saponins as comprehensive indexes,orthogonal test was applied to investigation of the water addition,extraction time,and extraction times for optimizing the best extracting technology.Results The best extracting technology was using 10 times the amount of water,extracting 3 times and 1.5 h per time.Conclusion The extraction technology is safe and effective,which can be used as extraction for Compound Taizishen Granule prescription.
|
eng_Latn
| 794,483 |
Processing of Structural Composites from Biobased Thermoset Resins and Natural Fibres by Compression Moulding
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With the aim of producing composites from renewable materials for the furniture industry, a number of thermoset prepregs were manufactured and evaluated. The applicability of two different biobased ...
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Objective To study the best extracting technology of Compound Taizishen Granule prescription.Methods The total polysaccharides and total saponins were determined by UV spectrophotometer.With the content of total polysaccharides and total saponins as comprehensive indexes,orthogonal test was applied to investigation of the water addition,extraction time,and extraction times for optimizing the best extracting technology.Results The best extracting technology was using 10 times the amount of water,extracting 3 times and 1.5 h per time.Conclusion The extraction technology is safe and effective,which can be used as extraction for Compound Taizishen Granule prescription.
|
eng_Latn
| 794,487 |
Hemicelluloses and summative analysis of timothy hay.
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Abstract The four hemicellulose fractions of timothy hay showed an increase in the ratio of pentose molecules per uronic acid molecule with the increase in alkalinity of the solvent required to extract them. A summative analysis of the constituents of timothy hay was made.
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Objective To study the best extracting technology of Compound Taizishen Granule prescription.Methods The total polysaccharides and total saponins were determined by UV spectrophotometer.With the content of total polysaccharides and total saponins as comprehensive indexes,orthogonal test was applied to investigation of the water addition,extraction time,and extraction times for optimizing the best extracting technology.Results The best extracting technology was using 10 times the amount of water,extracting 3 times and 1.5 h per time.Conclusion The extraction technology is safe and effective,which can be used as extraction for Compound Taizishen Granule prescription.
|
eng_Latn
| 794,495 |
Growth and acid producing characteristics of three flavor lactic acid bacteria strains
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Lactic acid bacteria acts as flavor formation microbes during the soy sauce fermentation.Growth characteristics of three flavor lactic acid bacteria strains,which were isolated from soybean paste and soy sauce mash,were studied.The results indicated that grown conditions of three strains fitted with fermented environment of soy sauce mash.Study of organic acids with ion chromatography indicated that the predominant organic acids produced by three strains were lactic acid and acetic acid,which were different in both quantity and varieties.
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Harmful Algal Blooms (HABs) events were analyzed in this study at four monitoring stations in the Gulf of Nicoya between January 2008 and December 2010. Water samples were collected at 1 and 5 m deep during each HAB event. Furthermore, the following physicochemical parameters were measured in situ: Secchi disk depth, temperature, salinity, dissolved oxygen, and saturation percentage of oxygen in water. Radiation and precipitation data was provided by the National Meteorological Institute of Costa Rica. The concentration of dominant microalgae and associated species was determined. A total of 11 events were recorded, 72.7% during rainy season and 27.3% during dry season, most of them during the La Nina atmospheric phenomenon. Dominant species included the following dinoflagellates; Alexandrium monilatum, Levanderina 1
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eng_Latn
| 794,497 |
Study of the effect of lamination process on pasta by physical chemical determination and near infrared spectroscopy analysis
|
Abstract The objective of this study was to evaluate the chemical and physical characteristics of fresh egg pasta samples obtained by using two different production methodologies: extrusion and lamination. The results of the study demonstrate that products have different characteristics in terms of colour and level of gelatinization, while they do not show significant differences with regard to the amount of absorbed water during the cooking stage. It was evaluated that it is possible to discriminate the two kinds of products by using FT-NIR spectroscopy. FT-NIR analysis results suggest the presence of a different matrix–water association, a diverse level of starch gelatinization and a distinct starch–gluten interaction in the two kinds of pasteurised samples.
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Abstract A convenient microwave-assisted methodology is developed for the generation of 5-chloro-3-(dimethylamino)pyrazin-2(1H)-ones. The method entails a chemoselective desulfitative removal of a phenylthioether bond upon DMF/H2O treatment in the presence of sodium carbonate, yielding the desired compounds in 73–96%.
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eng_Latn
| 794,502 |
Optimization of Extraction Technology of Yanqing Granule by Orthogonal Test
|
Objective To optimize the extraction technology of Yanqing Granule by orthogonal test.Methods Using the contents of chlorogenic acid and total extraction as indexes,choosing solvent volume,extracting duration and extracting times as influential factors,the optimal extraction condition was studied by L9(34) orthogonal test.Results The optimal extraction condition of Yanqing Granule was: 200 mL water for 1/3 amount of drugs,refluxing extraction for 3 times and 0.5 h each time.Conclusion The optimal extraction technology obtained in this study is simple and reproducible,and it has a higher application value in the production of Yanqing Granule.
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Objective To research the methods of harvesting donor liver and orthortopic liver transplantation.Methods To harvest 11 donor liver,inspect the quality of donor liver,observe donor liver function;orthotropic liver transplantation is performend for 11 cases,the operative experience,correlation complications,the successful probablility of operation and the condition of patients are summarized.Result Donor livers are harvested successfully,their functions are well after being transplanted;11 orthotroipic liver transplantation operations are performed successfully,the patient's conditions are well.Conclusion The function of donor liver is well,the successful probability of operation and the condition of patients are satisfying.
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eng_Latn
| 794,507 |
EXAMINING RICE YIELD IN CHIANG MAI, THAILAND WITH CUSUM CHART
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The change production of rice in Chiang Mai was examined with the excellent CUSUM chart. The study result capably illustrated a significant signal since 2010 to 2013. That meant, there was an apparently increase of rice yield in Chiang Mai particularly during 2011-2013.
|
Related Article: Yitao Li, Lin Li, Yanping Zhu, Xianggao Meng, Anxin Wu|2009|Cryst.Growth Des.|9|4255|doi:10.1021/cg9007262
|
yue_Hant
| 794,508 |
Residual nitrite levels in Philippine sweet bacon
|
Abstract This study established the residual nitrite (NO 2 ) levels in Philippine sweet bacon, tocino , prepared by micro- and small-scale meat processors from Pampanga, Philippines. The NO 2 levels in the tocino samples ranged from 0.76 to 12.00 and 12.20 to 144.42 mg NO 2 /kg tocino from micro- and small-scale processors, respectively. Generally, the NO 2 levels found in tocino samples analyzed were below the Philippine recommended residual NO 2 value of 125 mg/kg in cured meat products.
|
Objective To evaluate the effect of the post-processing mode of sewage treatment in two rural areas of Shengzhou and to provide scientific basis for rural toilets renovation.Methods Ten sanitary toilets of three cesspools and four cesspools for each were random selected.The basic situation,routine monitoring and pollutant items were evaluated.Results Routine monitoring items basically reached the sanitary standards and ammonia,COD,BOD5 qualified rate is low.The results of ammonia,phosphorus,COD,BOD5 in three cesspool sanitary toilets significantly better than that of four cesspool sanitary toilets.Conclusion Part of hygiene and pollution item removal rate and qualified rate are low.Harmlessness effect of tree cesspool toilets is better than four cesspool toilets.It is necessary to strengthen design,technical guidance and check in construction of rural toilets.
|
eng_Latn
| 794,510 |
Synthesis and Mesomorphic Properties of Tolan-type Liquid Crystals Containing Terminal Cyano Group
|
Two series of tolan-type liquid crystals containing terminal cyano group were synthesized. Their phase transition temperatures were also measured by texture observation with a polarizing microscope and confirmed by DSC.All compounds only exhibit a nematic phase. Their mesomorphic properties and fluoro-substituents effect were studied in detail.
|
Objective To optimize the extraction technology of Yanqing Granule by orthogonal test.Methods Using the contents of chlorogenic acid and total extraction as indexes,choosing solvent volume,extracting duration and extracting times as influential factors,the optimal extraction condition was studied by L9(34) orthogonal test.Results The optimal extraction condition of Yanqing Granule was: 200 mL water for 1/3 amount of drugs,refluxing extraction for 3 times and 0.5 h each time.Conclusion The optimal extraction technology obtained in this study is simple and reproducible,and it has a higher application value in the production of Yanqing Granule.
|
eng_Latn
| 794,512 |
Antioxidant properties and phenolic profile of the most widely appreciated cultivated mushrooms: a comparative study between in vivo and in vitro samples.
|
Wild and commercial mushrooms as source of nutrients and nutraceuticals.
|
Mechanical stress in solar cells with multi busbar interconnection — Parameter study by FEM simulation
|
eng_Latn
| 794,522 |
Barbary Wolfberry Fruit Efficacy and Comprehensive Utilization
|
Wolfberry was a valuable Medicinal and Edible Plants.Its fruit has high medicinal and food value.The roots,stems,leaves and seeds of Wolfberry were rich with good nutritional and medicinal value.In order to make full use of wolfberry,this article describes the comprehensive development and utilization of methods and some of the features of the extraction factor.It's a significant guidance for barbary wolfberry fruit processing,comprehensive utilization and the development of its high added values.
|
This paper presents a suitable solution of studying methods on BRBs’ critical load with finite element software．The effects of the relevant factors on the BRBs’ ultimate bearing capacity are investigated, and some practical suggestions for the design and production are provided．
|
eng_Latn
| 794,529 |
Outage costs in electrical distribution networks - a Finnish study
|
Interruption costs of service sector electricity customers, a hybrid approach
|
Considering extreme outage events in cost-benefit analysis of distribution systems
|
eng_Latn
| 794,739 |
Due to an exponential increase in load demand and lack of capital resources to improve the existing transmission line infrastructure, power utilities are focusing on methods to increase the efficiency and loadability of existing infrastructure. This study presents a new approach for simultaneous optimum distributed generation (DG) placement and optimum tie-switch allocation based on maximisation of system loadability using discrete artificial bee colony algorithm. The proposed algorithm is tested on 16-Bus, 33-Bus and 69-Bus radial distribution test system. The obtained results show that with simultaneous optimum DG placement and optimum tie-switch allocation, better results are achieved rather than solving two problems independently. Further it was also found that the proposed method has improved the efficiency of the system in terms of maximisation of system loadability, reduction in power system losses, improving the kVA margin to maximum loadability and voltage quality improvement.
|
Optimal placement of new sensors is of great importance to enhancing distribution system monitoring and resiliency. Utilities are in need of a platform for an optimal sensor placement strategy other than the traditional experience-based strategy. In this paper, a sensor placement optimization tool (SPOT) is developed. It contains two selected modules based on industry priority: distribution system state estimation (DSE) and recloser placement (RP). The DSE module incorporates three-phase system functionality to reflect practical distribution systems with asymmetrical topology and unbalanced loading. In the RP module, the impact of microgrids is modeled. SPOT is timely since it can assist utilities in developing their own optimal sensor allocation strategies.
|
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
| 794,761 |
This paper proposes a novel space vector pulse width modulation (SVPWM) technique to address the capacitor voltage balancing issue in MMCs. The MMC topology consists of cascade connected identical and individual controllable submodules (SMs) to generate higher level output voltages. The characteristic of DC floating capacitor of SM complicates the modulation technique for MMC. This work presents a study of different carrier based modulation techniques for MMC. In this paper, a novel SVPWM technique and analogue sorting algorithm are implemented to control the SM capacitor voltages. The proposed SVPWM technique and existing carrier based modulation techniques for a five level MMC are implemented in MATLAB/Simulink environment. The simulation results of the proposed modulation technique is presented and compared with the existing carrier based modulation techniques.
|
A new neutral-point-clamped pulsewidth modulation (PWM) inverter composed of main switching devices which operate as switches for PWM and auxiliary switching devices to clamp the output terminal potential to the neutral point potential has been developed. This inverter output contains less harmonic content as compared with that of a conventional type. Two inverters are compared analytically and experimentally. In addition, a new PWM technique suitable for an ac drive system is applied to this inverter. The neutral-point-clamped PWM inverter adopting the new PWM technique shows an excellent drive system efficiency, including motor efficiency, and is appropriate for a wide-range variable-speed drive system.
|
In this paper, a new simplified space-vector pulse width modulation (SVPWM) method for a three-level inverter is proposed. This method is based on the simplification of the space-vector diagram of a three-level inverter into that of a two-level inverter. If simplified by the proposed method, all the remaining procedures necessary for the three-level SVPWM are done like conventional two-level inverter and the execution time is greatly reduced. The DC-link neutral-point potential control algorithms are implemented more easily. The proposed method can be applied to the multi-level inverters above three-level. The validity of the new SVPWM method is verified by experiment with a 1000 kVA three-level insulated gate bipolar transistor (IGBT) inverter.
|
eng_Latn
| 794,790 |
This paper addresses the reliability impact of connecting IPPs to the part of a radial supply system having relatively poor reliability. Conceptually, adding a switching substation to a radial system can have a negative impact on the system reliability. The study presented in this paper quantifies the reliability impact of two different station configurations to which the IPPs are connected. The reliability of a three breaker ring bus configuration and a two breaker bus configuration is evaluated based on available information and specific assumptions. The comparison between the two substation configurations is made. How to select an appropriate station configuration for connecting IPPs to help achieve the BCTC reliability objective in the future is also discussed.
|
The paper presents an overview of data sources, infrastructures, models and functionalities of the reliability decision management system (RDMS) at BCTC.
|
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
| 794,791 |
Techno-economic Evaluation of Reduction of Low-voltage Bushings Diameter in Single-phase Distribution Transformers
|
The contributions of this article are the analysis and economic evaluation of the impact on tank wall losses of a diameter reduction of low-voltage bushings of pole-mounted single-phase distribution transformers. Finite element simulations of 5- to 167-kVA transformers were performed. The study was motivated when bushing manufacturers reduced diameter from 4.6 to 3.6 cm. Results show that when the diameter of low-voltage bushings is reduced, (i) load losses increase and (ii) total owning cost decreases for transformers up to 15 kVA and increases for transformers of 25-167 kVA. The insertion of non-magnetic material between bushing holes is also evaluated.
|
This article introduces the method of intelligent regulation to control the Buck power-electronic converter using a newly developed small-signal model of the pulse width modulation switch. The implemented method uses a fuzzy-PID controller that is tuned using the global search method of genetic algorithm. The experimental simulation results show that the used intelligent hierarchical regulation method using the GA- tuned fuzzy-PID controller, for the utilized new PWM small- signal model, produces the desired system response for performance enhancement of the electronic switching-mode Buck converter despite the occurrence of noise with comparatively high amplitudes.
|
eng_Latn
| 794,807 |
Reactive Power Compensation in High Power Applications by Bidirectionalcasceded H-Bridge Based Statcom
|
In this paper, a simple static var compensating scheme using a cascaded two-level inverter-based multilevel inverter is proposed. The topology consists of two standard two-level inverters connected in cascade through open-end windings of a three-phase transformer. The dc-link voltages of the inverters are regulated at different levels to obtain four-level operation. The simulation study is carried out in MATLAB/SIMULINK to predict the performance of the proposed scheme under balanced and unbalanced supply-voltage conditions. Index Terms— DC-link voltage balance, multilevel inverter, power quality (PQ), static compensator (STATCOM).
|
PROTECTION DEVICE FOR A TELEVISION RECEIVER INTERRUPTING SUPPLY CIRCUIT OF THE RECEIVER INCLUDING THE CIRCUIT SWEEP HORIZONTAL INCIDENT. DEVICE INCLUDING MEANS DELAY 35, 38 TO DISCONTINUE Do CIRCUIT AFTER DETECTION OF ABSENCE OF A TIME AT LEAST ONE PREDETERMINED TIME T IS REPRESENTED BY VOLTAGE TERMINAL CAPACITOR 35 SE LOADING, WHEN APPEARANCE OF A DEFECT, ONLY oCCUR WHEN THE PERIODIC IMPLUSIONS SHORT-TERM IN RELATION TO THE PERIOD AS THE PULSE RETURN SWEEP HORIZONTAL.
|
eng_Latn
| 794,837 |
ADJUSTING CONVERTER CONTROLS FOR PARALLELED DC CONVERTERS USING A DIGITAL TRANSIENT SIMULATION PROGRAM
|
A description of how accurate system modelling of a dc system with an electromagnetic transient simulation program can be used to study and correct interbipole oscillations between converters connected into a parallel multiterminal system is given. The paper shows how to decide on the detail of modelling that is required, and demonstrates that it is often not enough to use prepackaged , generic HVDC control models, supplied with these programs. The detail of control models that are used in the electromagnetic simulation programs are shown to have a significant impact, in some cases, on the simulation results. In particular, a case of six hertz oscillations, in the dc currents of two converters on the Nelson River System, is accurately simulated, and it is shown that control modifications suggested by the simulation actually do eliminate the interbipole oscillations.
|
In this paper we analyze the impact of systematic errors in TRL calibration on the extracted equivalent circuit parameters of the measured device. We mainly focus on extraction of RLCG-parameters (resistance, inductance, capacitance, conductance) of transmission lines and inductors. We show how the uncertainties in measured S-parameters and in determined characteristic impedance propagate into RLCG-parameters. In particular, we emphasize the importance and the difficulty of an accurate determination of the imaginary part of characteristic impedance. We use the results of our sensitivity analysis to estimate the accuracy of RLCG-parameter extraction of a coplanar transmission line and a 2.2 nH spiral inductor. Finally, we propose an alternative method for determination of certain RLCG-parameters based on causal relationships.
|
yue_Hant
| 794,839 |
Boosting inverter power output: Case study - Solar system
|
Project report submitted in partial fulfillment of the requirements for the award of Bachelors of Science in Computer Engineering of Makerere University.
|
In this paper,node power of compensation method is obtained with two 8 rank matrix.Two line outage load flow is obtained by Newton. Newton load flow for normal state is used,so efficiency and accuracy of line outage analysis are improved.
|
eng_Latn
| 794,853 |
3-level 3-phase voltage-fed soft-switching inverter with new space voltage vector modulation scheme and its feasible evaluations
|
This paper presents of digitally-controlled 3-level 3-phase voltage source type soft switching IGBT inverter topology with two auxiliary active resonant DC link (ARDCL) snubbers which can operate under a condition of zero voltage switching (ZVS). Its operating principle and its related new instantaneous space vector allocation modulation method are proposed and discussed for telecommunication energy plants. The feasible performances of ARDCL-assisted soft switching inverter suitable for high power applications is illustrated and evaluated on the basis of simulation and experimental results as compared with the 3-level 3-phase hard switching inverter using IGBT power modules.
|
A large class of time-varying filters can be described via pseudo-differential operators belonging to the Hormander class OPS 0 0 , 0. The questions whether and how an input signal can be reconstructed from a known output lead to the problems of invertibility of pseudo-differential operators in that class and of (at least, numerical) solution of pseudo-differential equations. We are going to derive effective conditions for the invertibility for pseudo-differential operators with globally slowly varying symbols as well as for causal pseudo-differential operators, and we study the stability of the finite sections method with respect to time and frequency for these operators.
|
eng_Latn
| 794,867 |
Switching synchronization states of a ring of coupled chaotic circuits with one-direction delay effects
|
Synchronization states can be observed in coupled circuits. Further, interesting synchronization states were confirmed in coupled chaotic circuits containing time delay. In this study, we investigate the novel coupling methods and synchronization states observed in coupled chaotic circuits containing time delay. The novel coupling methods is a ring of coupled chaotic circuits with one-direction delay effects. Synchronization state observed the novel coupling methods is switching synchronization state. The switching synchronization state is changed by time delay of each subcircuit. We focus on relationships between switching synchronization state and the pattern of time delay. Moreover, we investigate the cycle of switching synchronization state.
|
This paper analyzes the behavior of DFIG and converter in the case of grid fault including symmetrical and unsymmetrical fault. First, the simple space vector models are presented to estimate the moduli of DFIG stator voltage in different grid fault. Then with the symmetrical components method, the dynamic response of DFIG and converter in grid fault is analyzed in details, and the equations of grid fault are derived. According to the equation, the maximum value and it's occurred moment of the short-current of DFIG is determined, which can be used to design crowbar precisely. At last, based on the above analysis, the design guidelines for grid fault ride-through are proposed.
|
eng_Latn
| 794,869 |
The effect of sinus rhythm on the periodicity and coupling interval of ventricular parasystolic rhythm.
|
Ventricular parasystole was studied in three patients. Long periods of the ECG were analysed allowing features of the ectopic mechanism to be deduced. The ECGs were recorded on magnetic tape and analysed with the aid of special purpose and digital computers. Sinus rhythm was found to alter the periodicity of the ectopic rhythm and to adjust its phase relation–ship relative to sinus rhythm. These effects were more marked when the ectopic period was similar to the sinus period or its multiple. In one patient phase adjustment resulted in periods of bigeminy with fixed coupling. The adjustment of periodicity and phase probably results from subthreshold stimuli due to sinus rhythm modifying the function of spontaneous depolarization of the ectopic pacemaker.
|
This paper investigates the nonlinear characteristic between voltage phase and torque and proposes a model-based design of voltage phase controller. PMSM drive systems should realize a quick torque response and have a wide operating range. However, in high-speed region, the control input is voltage phase only and the plant is nonlinear due to the inverter output voltage amplitude saturation. Because of this nonlinear characteristic between current and voltage phase, model-based design have not yet been carried out. As basic study, this paper proposes a model-based voltage phase controller for SPMSM. Simulation results and experimental results show the effectiveness of the model-based design method. In addition, the analysis of the derived plant model shows the relationship between q-axis current and voltage phase is a non-minimum phase system.
|
eng_Latn
| 794,881 |
Technical exploration of high-voltage power converters
|
The development of high-voltage power converter is technically explored. Topological configurations of several AC high-voltage power converters are compared categorizingly. The currently existing problems and the researching orientation are pointed out also.
|
To provide a class of hazard functions in analyzing survival data, the power family of transformations has been proposed in the literature. Our work in this paper considers the existence of cured patients and random effects due to clustering of survival data in a long-term survivor model setting. A power family of transformations is assumed for the relative risk in the hazard function component. Such an extension allows us to flexibly base the inferences on various hazard function assumptions, particularly taking exponential and linear relative risk as two special cases. The parameter governing the power transformation could be determined by means of a modified Akaike information criterion (AIC). Applications to two sets of survival data illustrate the use of the proposed long-term survivor mixture model. A simulation study is carried out to examine the performance of the estimators under the proposed numerical estimation scheme.
|
eng_Latn
| 794,894 |
Charge accumulation and cyclic image transfer on CCD: Search for rapid variations of magnetic field in γ Equ
|
We search for the variable component of themagnetic field in γ Equ by studying four Nd III lines with the Main Stellar Spectrograph of the 6-m BTA telescope of the Special Astrophysical Observatory via accumulation and cyclic transfer of the electronic image of the Zeeman spectrum on the CCD. The single exposure time was set equal to 1/8 of the spectral variability period. We detected no variable component in the magnetic field of γ Equ with a period of 12.1 min in the November 5/6, 2003 observations.
|
Combined with six regional grids in China, the security and economy about the voltage levels,transmission,structure and interconnection of synchronized power system are analyzed. It is pointed out that,AC 500 kV synchronized power system can meet the demands of China’s economic development until 2020 year;HVDC and AC 500 kV transmission of independent power sources are its fundamental power supply modes;the branch - like network structure and the hot - standby dynamic reactive power are the solutions to its cascading faults and voltage instability;the regional grid interconnection could be optimized by choosing between controllable(ordinary or back - to - back HVDC) and uncontrollable (extra - high voltage AC) mode according to practical conditions.
|
eng_Latn
| 794,901 |
Fault Nature Identification for Single-phase Adaptive Reclosure on Transmission Lines with Shunt Reactors
|
The voltage characteristics of the fault phase in the shunt reactor and the neutral point reactor are analyzed for the EHV transmission lines with shunt reactors. The study shows that in the case of solid permanent grounding, the ratio of the voltage in the fault phase shunt reactor to the voltage in the neutral point reactor is always larger than that for transient faults. Based on the above finding, a method using the voltage in the shunt reactor and neutral point reactor to identify the fault nature is proposed for the single-phase adaptive reclosure of transmission lines with the shunt reactors. EMTP simulation results show that the proposed method is correct and efficient in realizing single-phase adaptive reclosure of EHV transmission lines.
|
We discuss the relation between the observed CC, ES, and NC fluxes with the flavor fractional content of the solar neutrino flux seen by SNO. By using existing estimates of the cross sections for the charged and neutral current reactions which take into account the detector resolution, we show how the forthcoming SNO rates unconstrained by the standard $^8$B shape could test the oscillations into active states. We perform a model independent analysis for the Super-K and SNO data, assuming a non distorted spectrum.
|
eng_Latn
| 794,988 |
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