WorldWideScience

Sample records for abusing runaway adolescents

  1. Abuse, support, and depression among homeless and runaway adolescents.

    Science.gov (United States)

    Bao, W N; Whitbeck, L B; Hoyt, D R

    2000-12-01

    This study examines the effectiveness of social support networks on psychological well-being among 602 homeless and runaway adolescents. The respondents were interviewed in shelters, drop-in centers, and on the streets in cities of four Midwestern states (Missouri, Iowa, Nebraska, and Kansas). The path model was used to test the direct effect of family abuse and precocious independence on adolescent depressive symptoms and indirect effects through social support networks. Results indicate that although abusive family origins contribute directly to depressive symptoms there are indirect effects of family abuse and early independence through social support networks. Family abuse and early independence drive homeless adolescents to rely on peers for social support. While support from friends on the street reduces depression, association with deviant peers increases depression.

  2. Families of Homeless and Runaway Adolescents: A Comparison of Parent/Caretaker and Adolescent Perspectives on Parenting, Family Violence, and Adolescent Conduct.

    Science.gov (United States)

    Whitbeck, Les B.; And Others

    1997-01-01

    Reports of 120 runaway adolescents and their parents/caretakers were compared on measures of parental monitoring, parental warmth and supportiveness, parental rejection, physical and sexual abuse, and adolescent conduct. Results indicate a high level of agreement, suggesting the adolescents accurately depicted the troubled family situations that…

  3. Child Sexual Abuse and Adolescent Prostitution: A Comparative Analysis.

    Science.gov (United States)

    Seng, Magnus J.

    1989-01-01

    Explored relationship between sexual abuse and adolescent prostitution by comparing 70 sexually abused children with 35 prostitution-involved children on 22 variables. Findings suggest that relationship is not direct, but involves runaway behavior as intervening variable. Concludes that it is not so much sexual abuse that leads to prostitution, as…

  4. Predictors of Trauma-Related Symptoms among Runaway Adolescents

    Science.gov (United States)

    McCarthy, Michael D.; Thompson, Sanna J.

    2010-01-01

    Little is known about trauma-related symptoms among runaway adolescents. Precocious departure from familial homes often exposes youth to traumatic victimization. This study examined the extent to which runaway adolescents present trauma symptomotology and assessed factors that predict trauma symptoms. Participants (N = 350) were 12-18 years of age…

  5. Predictors of Self-reported Sexually Transmitted Diseases among Homeless and Runaway Adolescents

    OpenAIRE

    Tyler, Kimberly A.; Whitbeck, Les B.; Hoyt, Dan R.; Yoder, Kevin A.

    2000-01-01

    Path analysis was used to investigate factors associated with self-reported sexually transmitted diseases among 569 homeless and runaway adolescents in four Midwestern states. Youth were interviewed by outreach workers directly on the streets, in shelters, and in drop-in centers. Results indicated that family abuse was positively related to substance use, affiliation with friends who sold sex, and time on own. Early family abuse indirectly increased the likelihood of self-reported sexually tr...

  6. Adolescent Substance Abuse.

    Science.gov (United States)

    Thorne, Craig R.; DeBlassie, Richard R.

    1985-01-01

    Cummings (1979), citing evidence from the National Institute of Drug Abuse, reports that one of every eleven adult Americans suffers from a severe addictive problem. Drug addiction is epidemic among teenagers; one of every six teenagers suffers from a severe addictive problem. This paper focuses on adolescent drug/substance abuse. (Author)

  7. Sexual Abuse as a Precursor to Prostitution and Victimization among Adolescent and Adult Homeless Women.

    Science.gov (United States)

    Simons, Ronald L.; Whitbeck, Les B.

    1991-01-01

    Studied 40 adolescent runaways and 95 homeless women to examine impact of early sexual abuse on prostitution and victimization. Findings suggest that early sexual abuse increases probability of involvement in prostitution irrespective of influence of running away, substance abuse, and other deviant acts; only indirectly affects chances of…

  8. Dextromethorphan Abuse in Adolescence

    Science.gov (United States)

    Bryner, Jodi K.; Wang, Uerica K.; Hui, Jenny W.; Bedodo, Merilin; MacDougall, Conan; Anderson, Ilene B.

    2008-01-01

    Objectives To analyze the trend of dextromethorphan abuse in California and to compare these findings with national trends. Design A 6-year retrospective review. Setting California Poison Control System (CPCS), American Association of Poison Control Centers (AAPCC), and Drug Abuse Warning Network (DAWN) databases from January 1, 1999, to December 31, 2004. Participants All dextromethorphan abuse cases reported to the CPCS, AAPCC, and DAWN. The main exposures of dextromethorphan abuse cases included date of exposure, age, acute vs long-term use, coingestants, product formulation, and clinical outcome. Main Outcome Measure The annual proportion of dextromethorphan abuse cases among all exposures reported to the CPCS, AAPCC, and DAWN databases. Results A total of 1382 CPCS cases were included in the study. A 10-fold increase in CPCS dextromethorphan abuse cases from 1999 (0.23 cases per 1000 calls) to 2004 (2.15 cases per 1000 calls) (odds ratio, 1.48; 95% confidence interval, 1.43–1.54) was identified. Of all CPCS dextromethorphan abuse cases, 74.5% were aged 9 to 17 years; the frequency of cases among this age group increased more than 15-fold during the study (from 0.11 to 1.68 cases per 1000 calls). Similar trends were seen in the AAPCC and DAWN databases. The highest frequency of dextromethorphan abuse occurred among adolescents aged 15 and 16 years. The most commonly abused product was Coricidin HBP Cough & Cold Tablets. Conclusions Our study revealed an increasing trend of dextromethorphan abuse cases reported to the CPCS that is paralleled nationally as reported to the AAPCC and DAWN. This increase was most evident in the adolescent population. PMID:17146018

  9. Adolescent Relationship Abuse (ARA) Toolkit

    Data.gov (United States)

    U.S. Department of Health & Human Services — The Adolescent Relationship Abuse (ARA) Toolkit provides information and strategies on how to: incorporate abuse prevention into programming; conduct staff training;...

  10. Recognizing the adolescent drug abuser.

    Science.gov (United States)

    MacKenzie, R G; Jacobs, E A

    1987-03-01

    Adolescents are at high risk for using and abusing illicit drugs. Guidelines for recognizing drug abusers are presented as well as a staging process for progression of drug use. The family physician is in an ideal position to identify young users/abusers and to assist them and their families in obtaining much needed assistance.

  11. Change in parent- and child-reported internalizing and externalizing behaviors among substance abusing runaways: the effects of family and individual treatments.

    Science.gov (United States)

    Slesnick, Natasha; Guo, Xiamei; Feng, Xin

    2013-07-01

    Shelter-recruited adolescents are known to have high rates of substance abuse and co-occurring internalizing and externalizing problem behaviors. Many studies have documented these mental health concerns, but only a small number of studies have tested interventions that may be useful for ameliorating these vulnerabilities. The current study compared three empirically supported psychotherapy interventions, Motivational Interviewing (MI), the Community Reinforcement Approach (CRA), and Ecologically-Based Family Therapy (EBFT) with 179 substance abusing runaway adolescents (47 % female, 74 % minority) and their primary caretaker recruited through a Midwestern runaway crisis shelter. Examining both child and primary caretaker reports, each treatment was associated with significant reductions in internalizing and externalizing behaviors to 24 months post-baseline. However, the trajectory of change differed among the treatments. Adolescents receiving MI showed a quicker reduction in internalizing and externalizing behaviors but also a quicker increase in these behaviors compared to adolescents receiving EBFT, who continued to evidence improvements to 24 months. The findings provide support for continued evaluation of these treatments for use with this vulnerable population of adolescents.

  12. Mental Disorders, Comorbidity, and Postrunaway Arrests among Homeless and Runaway Adolescents

    Science.gov (United States)

    Chen, Xiaojin; Thrane, Lisa; Whitbeck, Les B.; Johnson, Kurt

    2006-01-01

    This study examined the associations between lifetime mental disorder, comorbidity, and self-reported postrunaway arrests among 428 (187 males, 241 females) homeless and runaway youth. The analysis examined the pattern of arrests across five lifetime mental disorders (alcohol abuse, drug abuse, conduct disorder, major depressive episode, and…

  13. Methylphenidate and dextroamphetamine abuse in substance-abusing adolescents.

    Science.gov (United States)

    Williams, Robert J; Goodale, Leslie A; Shay-Fiddler, Michele A; Gloster, Susan P; Chang, Samuel Y

    2004-01-01

    The prevalence of methylphenidate and dextroamphetamine misuse and abuse was examined in 450 adolescents referred for substance abuse treatment. Twenty three percent reported nonmedical use of these substances and six percent were diagnosed as methylphenidate or dextroamphetamine abusers. Abuse was more common in individuals who were out of school and had an eating disorder. Methylphenidate and dextroamphetamine abuse appears to be much less common than abuse of most other substances. It does occur, however, and parents and schools need to exert greater control over the dispensing of these medications. Physicians are advised to prescribe non-stimulant medications (eg, bupropion) when treating attention deficit hyperactivity disorder in substance-abusing individuals.

  14. Psychologic aspects of sexual abuse in adolescence.

    Science.gov (United States)

    Jeffrey, T B; Jeffrey, L K

    1991-12-01

    This paper reviews psychologic aspects of sexual abuse in female adolescents. It documents that sexual abuse is widespread, occurring at an alarming rate at all socioeconomic levels of society. It is perpetrated principally by adult men in the victim's family. Often its effects are tragic. Adolescent female sexual abuse victims are at high risk for subsequent acting out behavior, sexual promiscuity, physical and sexual abuse, anxiety, depression, low self-esteem, alcohol and drug abuse or dependence, chronic sleep disturbance, dissociative disorders, eating disorders, emotional numbing, dissociation, guilt, shame, hyperalertness, suicidal ideation, and multiple associated psychiatric disorders. Although it may appear at a surface level that sexual abuse victims recover from such abuse, follow-up studies suggest that many remain disabled long after the abuse has ended. Health care professionals should be especially cognizant of the magnitude of the impact of sexual abuse on adolescent girls and recognize the need of these patients for psychologic and medical services.

  15. Mechanical abuse simulation and thermal runaway risks of large-format Li-ion batteries

    Science.gov (United States)

    Wang, Hsin; Lara-Curzio, Edgar; Rule, Evan T.; Winchester, Clinton S.

    2017-02-01

    Internal short circuit of large-format Li-ion pouch cells induced by mechanical abuse was simulated using a modified mechanical pinch test. A torsion force was added manually at ∼40% maximum compressive loading force during the pinch test. The cell was twisted about 5° to the side by horizontally pulling a wire attached to the anode tab. The combined torsion-compression force created small failure at the separator yet allowed testing of fully charged large format Li-ion cells without triggering thermal runaway. Two types of commercial cells were tested using 4-6 cells at each state-of-charge (SOC). Commercially available 18 Ahr LiFePO4 (LFP) and 25 Ahr Li(NiMnCo)1/3O2 (NMC) cells were tested, and a thermal runaway risk (TRR) score system was used to evaluate the safety of the cells under the same testing conditions. The aim was to provide the cell manufacturers and end users with a tool to compare different designs and safety features.

  16. Onset of Conduct Disorder, Use of Delinquent Subsistence Strategies, and Street Victimization among Homeless and Runaway Adolescents in the Midwest

    Science.gov (United States)

    Chen, Xiaojin; Thrane, Lisa; Whitbeck, Les B.; Johnson, Kurt D.; Hoyt, Dan R.

    2007-01-01

    This study examines the effects of childhood-onset conduct disorder on later antisocial behavior and street victimization among a group of homeless and runaway adolescents. Four hundred twenty-eight homeless and runaway youth were interviewed directly on the streets and in shelters from four Midwestern states. Key findings include the following.…

  17. Adolescent Drug Abuse: Etiological and Treatment Considerations

    Science.gov (United States)

    Amini, Fariboz; And Others

    1976-01-01

    Issues involved in treating adolescent drug abusers and literature describing abuser personality traits are examined. The Youth Service at Langley Porter Institute and the problems encountered and solutions attempted there are discussed. The importance of residential as opposed to outpatient treatment and honesty in staff-patient relationships is…

  18. Methylphenidate Misuse in Substance Abusing Adolescents.

    Science.gov (United States)

    Marsh, Linda D.; Key, Janice D.; Payne, Tricia P.

    2000-01-01

    Study determined the change in prevalence of Methylphenidate misuse over the last four years in adolescents (N=240) assessed at an outpatient abuse treatment facility. Results showed a significant increase in Methylphenidate misuse over the last 2.5 years; this increase was greatest in White adolescents. Suggests that treatment with…

  19. Preventing and Treating Substance Abuse among Adolescents

    Science.gov (United States)

    Sussman, Steve

    2011-01-01

    Substance misuse is one of the most prevalent causes of adolescent injury and death. Additionally, 5-8% of adolescents in the U.S. qualify for a diagnosis of substance abuse disorder. This article discusses formal prevention and treatment program models, focusing on a continuum of care which extends from prevention to treatment alternatives.…

  20. Predicting Resilience in Sexually Abused Adolescents

    Science.gov (United States)

    Williams, Javonda; Nelson-Gardell, Debra

    2012-01-01

    This research examined factors that predicted resilience in sexually abused adolescents. Using Bronfenbrenner's Process-Person-Context-Time (PPCT) ecological model, this study considered the proximal and distal factors that would contribute to adolescents' reactions to sexual victimization. This correlational study used hierarchical regression…

  1. Heart rate variability biofeedback in adolescent substance abuse treatment.

    Science.gov (United States)

    Thurstone, Chris; Lajoie, Travis

    2013-01-01

    Strategies are needed to improve adolescent substance abuse treatment outcomes. For example, during outpatient substance abuse treatment, up to 80% of adolescents continue to use.(1),(2) Following residential substance abuse treatment, 88% of adolescents relapse within 6 months.(3.)

  2. Childhood Abuse and Attachment Styles of Adolescents

    Science.gov (United States)

    Karakus, Ozlem

    2012-01-01

    Introduction: The fact that emotional and social experiences in early childhood period within the family influence the experiences in adolescence and adulthood (communication skills, interpersonal relations) is not a new case. Therefore, the aim of this study is to examine the relationship between childhood abuse and attachment styles. Method: The…

  3. Integrating translational neuroscience to improve drug abuse treatment for adolescents.

    Science.gov (United States)

    Boyce, Cheryl Anne; Lynne-Landsman, Sarah D

    2013-06-01

    Adolescence is an exciting and challenging period of maturation, rapid brain development, and developmental changes in neurobiological, neurocognitive, and neurobehavioral processes. Although behavioral therapies available for adolescent substance abuse have increased, effectiveness research in this area lags considerably behind that of clinical research on treatment for drug-abusing adults. Behavioral treatment approaches show significant promise for treating drug-abusing adolescents, but many have not incorporated innovations in neuroscience on brain development, cognitive processes, and neuroimaging. Linking developmental neuroscience with behavioral treatments can create novel drug abuse interventions and increase the effectiveness of existing interventions for substance-abusing adolescents. Contemporary research on brain development, cognition, and neuroscience is ripe for translation to inform developmentally sensitive drug abuse treatments for adolescents. Neuroscientists and interventionists are challenged to build mutual collaborations for integration of neuroscience and drug abuse treatment for adolescents.

  4. The Self-Image of Physically Abused Adolescents.

    Science.gov (United States)

    Hjorth, Craig W.; Ostrov, Eric

    1982-01-01

    Physically abused and nonabused adolescents from similar backgrounds were compared via the Offer Self-Image Questionnaire. Abused adolescents were shown to feel worse in family relations, emotional stability, psychopathology, impulse control, coping skills, and overall self-image. Implications for the professional's treatment of abused children…

  5. A comparison of drug involvement between runaways and school youths.

    Science.gov (United States)

    Fors, S W; Rojek, D G

    1991-01-01

    Problems related to homeless/runaway youths have received increased attention in recent years. Homeless/runaway youths manifest many problems in addition to being absent from home and without supervision of a parent or guardian. The purpose of the study was to determine drug use and abuse patterns of homeless/runaway youths and to compare those patterns, along with attitudes toward selected illicit behaviors, with similar data collected from adolescents in school. Data were collected from persons (n = 253) in homeless/runaway shelters in the southeast United States. Comparisons made with data from other studies of runaways and of youths in school indicate that drug use and abuse is two-three times more prevalent for runaways than with the school youths. Runaways' attitudes toward selected illicit behaviors are more tolerant than those of school youths. Intervention programs for runaway/homeless youths should reflect an understanding of the complexity of the psycho-social and behavioral history of the clients which is much different than that of those who are in school.

  6. Meanings intrafamilial sexual abuse for female adolescents

    Directory of Open Access Journals (Sweden)

    Juliana Hilario Maranhão

    2014-12-01

    Full Text Available This article came from the monographic study “Resilience and Sexual Violence: a study of adolescents victimized by sexual abuse assistance” (MARANHÃO, 2008, in which was investigated the building resilience in victimized adolescents. Resilience is characterized as overcoming adversity, setting up as something procedural, promoted by the interaction of personal and collective protection, in particular context of risk or social vulnerability. We made the trimming about the meanings and feelings of sexual victimization within the family from the perception of adolescents between 12 and 16 years of age that received care in a Specialized Reference Social Assistance in 2010. The research is qualitative, having as theoretical-methodological referential the Historic-Cultural Theory. Data collection was used by semi-structured interview. We realize that the profile of the victims are set up by females, the beginning of sexual abuse occurred between childhood and preadolescence. The profile of perpetrators are men, adults, acting the role of the stepfather, father and uncle. Despite an abject sense, adolescents could not break the cycle of violence. Friends, extended family, and the work of professionals emerged as support for the redefinition of the abusive relationships.

  7. Internet Abuse Risk Factors among Spanish Adolescents.

    Science.gov (United States)

    Carballo, José L; Marín-Vila, María; Espada, José P; Orgilés, Mireia; Piqueras, José A

    2015-11-27

    Empirical evidence has revealed various factors that contribute to the development and maintenance of Internet abuse. The aim of this paper was to analyze, on a sample of Spanish adolescents, the relationship between Internet abuse and: (1) Personal and interpersonal risk factors, including social skills in both virtual and real-life contexts; (2) Drug use. A total of 814 high school students aged between 13 and 17 participated in this study, and were divided into two groups: Internet Abusers (IA = 173) and Non-Internet Abusers (NIA = 641). Questionnaires were used to analyze Internet and drug use/abuse, as well as social skills, in virtual and real contexts. Various interpersonal risk factors (family and group of friends) were also assessed. IA showed a more severe pattern of Internet and drug use, as well as poorer social skills in both contexts. Moreover, their groups of friends appeared more likely to become involved in risky situations related to Internet and drug abuse. Both IA and NIA showed more adaptive social skills in the virtual context than in the real one. There is a need for further research to build on these findings, with a view to designing specific preventive programs that promote responsible Internet use.

  8. [The relationship between alcohol abuse and conduct disorders in adolescents].

    Science.gov (United States)

    Grechanyĭ, S V

    2013-01-01

    Fifty-two adolescents with different forms of conduct disorders (ICD-10 items F90-92 and F10.1) were examined using "The Nisonger Child Behavior Rating Form" ("NCBRF, TIQ version") and "The Adolescent Drug Abuse Diagnosis (ADAD)" (a "EvroADAD" version). Factor analysis of quantitative data revealed 3 factors attributed to main clinical types of alcohol abuse in adolescents: 1) alcohol abuse associated with personal disorders; 2) alcohol abuse associated with attention deficit hyperactivity disorder - ADHD; 3) alcohol abuse associated with the sensitivity within personal-neurotic reactions.

  9. Substance Abuse Treatment for Children and Adolescents: Questions to Ask

    Science.gov (United States)

    ... Families Guide Substance Abuse Treatment For Children And Adolescents: Questions To Ask No. 41; Reviewed July 2013 Many children and adolescents use alcohol and other drugs. Some develop serious ...

  10. Sexual abuse of children and adolescents.

    Science.gov (United States)

    Sugar, M

    1983-01-01

    Parents, relatives, and friends may inflict their passions on children of the same or opposite sex. This is often initiated by sleeping together. Sexual abuse contributes to and causes emotional trauma, although the child's turmoil, confusion, wish for acceptance, and anxiety may be overlooked by the parent and professional. Mutual silence aided by threats adds to the anxiety. Despite the notion that reports of parental sexual exploitation of their children are usually fantasies, there appear to be increasing data that incest and sexual abuse are frequent traumata. At present, there is increased risk of lowering the incest barrier because of increased rates of divorce and step- or surrogate parenthood, since they provide additional potential for being sexually and emotionally traumatized. Sexual abuse seems to be part of a constellation involving neglect and a pathological symbiosis. That sexual abuse is emotionally traumatic is apparent, but it needs emphasizing. Children's defensive reactions may cloud this, and it may be years before such incidents are connected to symptomatic behavior, even when the child is in intensive therapy. In the reported cases, there appears to be a pattern of reactions and defenses related to the traumata that are embedded in imprinting and identification with the aggressor. This leads to sexual abuse being a legacy passed on to the next generation of victims, as the victim becomes the molester through identification. Adolescent self-destructive behavior may stem from guilt about sexually abusing younger children. Therapists may be better able to understand and deal with some of their patients' symptoms if sexual abuse is considered as a possible factor in one or both directions.

  11. Sexual Abuse Victimization and Psychological Distress among Adolescent Offenders.

    Science.gov (United States)

    Phan, Debra L.; Kingree, J. B.

    2001-01-01

    This study focused on sexual abuse victimization and psychological distress among 272 adolescent offenders. Female respondents reported more sexual abuse victimization and psychological distress than did their male counterparts. Furthermore, church attendance moderated the association between sexual abuse victimization and psychological distress…

  12. The Relationship between Bullying and Animal Abuse Behaviors in Adolescents: The Importance of Witnessing Animal Abuse

    Science.gov (United States)

    Gullone, Eleonora; Robertson, Nerida

    2008-01-01

    Children's abuse of animals may be predictive of aggression towards humans. This study assessed concurrent engagement in animal abuse and bullying behaviour in 241 adolescents aged 12 to 16 years. A total of 20.6% of youths reported abusing animals at least "sometimes" and 17.8% reported bullying others on at least one occasion in the past year.…

  13. Adolescents and Substance Abuse: Warning Signs and School Counseling Interventions

    Science.gov (United States)

    Fuller, LaShonda B.

    2012-01-01

    Adolescence is a challenging time for many young persons. Navigating the academic, personal/social, and career planning challenges associated with adolescence indeed is challenging even with excellent school, family, and community support. For those adolescents struggling with substance use and abuse, these challenges become even greater. School…

  14. Prescription Opioid Abuse, Prescription Opioid Addiction, and Heroin Abuse among Adolescents in a Recovery High School: A Pilot Study

    Science.gov (United States)

    Vosburg, Suzanne K.; Eaton, Thomas A.; Sokolowska, Marta; Osgood, Eric D.; Ashworth, Judy B.; Trudeau, Jeremiah J.; Muffett-Lipinski, Michelle; Katz, Nathaniel P.

    2016-01-01

    The progression from prescription opioid (RXO) abuse to RXO addiction is not well understood in adolescents, nor is the progression from RXO addiction to heroin abuse. The purpose of this pilot study was to characterize the development of RXO drug abuse, RXO drug addiction, and heroin abuse in a small cohort of adolescents recovering from opioid…

  15. Child and Adolescent Abuse and Subsequent Victimization: A Prospective Study

    Science.gov (United States)

    Rich, Cindy L.; Gidycz, Christine A.; Warkentin, Jennifer B.; Loh, Catherine; Weiland, Paul

    2005-01-01

    Objective: We investigated the possible reciprocal relationship between victimization experiences and psychological functioning by assessing abuse experiences in childhood, adolescence, and during a 2-month follow-up period. Method: At the beginning of the study (Time 1), abuse histories, trauma and depressive symptoms, and interpersonal…

  16. Preventing Prescription Drug Abuse in Adolescence: A Collaborative Approach

    Science.gov (United States)

    Jones, Beth A.; Fullwood, Harry; Hawthorn, Melissa

    2012-01-01

    With the growing awareness of adolescent prescription drug abuse, communities and schools are beginning to explore prevention and intervention strategies which are appropriate for their youth. This article provides a framework for developing a collaborative approach to prescription drug abuse prevention--called the Prevention Awareness Team--that…

  17. Sexual abuse predicts functional somatic symptoms : An adolescent population study

    NARCIS (Netherlands)

    Bonvanie, Irma J.; van Gils, Anne; Janssens, Karin A. M.; Rosmalen, Judith G. M.

    2015-01-01

    The main aim of this study was to investigate the effect of childhood sexual abuse on medically not well explained or functional somatic symptoms (FSSs) in adolescents. We hypothesized that sexual abuse predicts higher levels of FSSs and that anxiety and depression contribute to this relationship. I

  18. Predicting Adolescent Drug Abuse: A Review of Issues, Methods and Correlates. Research Issues 11.

    Science.gov (United States)

    Lettieri, Dan J., Ed.

    Presented are 18 papers on predicting adolescent drug abuse. The papers have the following titles: "Current Issues in the Epidemiology of Drug Abuse as Related to Psychosocial Studies of Adolescent Drug Use"; "The Quest for Interpersonal Predictors of Marihuana Abuse in Adolescents"; "Assessing the Interpersonal Determinants of Adolescent Drug…

  19. Medical Marijuana Use among Adolescents in Substance Abuse Treatment

    Science.gov (United States)

    Salomonsen-Sautel, Stacy; Sakai, Joseph T.; Thurstone, Christian; Corley, Robin; Hopfer, Christian

    2012-01-01

    Objective: To assess the prevalence and frequency of medical marijuana diversion and use among adolescents in substance abuse treatment and to identify factors related to their medical marijuana use. Method: This study calculated the prevalence and frequency of diverted medical marijuana use among adolescents (n = 164), ages 14-18 years (mean age…

  20. Preventing Abuse of Drugs, Alcohol, and Tobacco by Adolescents.

    Science.gov (United States)

    Falco, Mathea

    From the mid-1960s until 1980, adolescent drug use rose sharply. Although use has declined somewhat since, adolescent cocaine use remains at peak levels, and crack presents a major threat. Treatment for compulsive drug or alcohol use is needed by 5 to 15 percent of the teenagers who experiment with drugs and alcohol. Drug abuse experts now believe…

  1. Pattern and Inclination of Adolescents Towards Substance Abuse

    Directory of Open Access Journals (Sweden)

    H Mahjoob

    2008-01-01

    Full Text Available Introduction: Narcotic drug abuse and illicit use of drugs is a major, complicated multifactorial phenomenon affecting most of the societies today. Incidence of drug abuse among adolescents is very high. Adolescents become addicted to substances more quickly than adults. The aim of this study was to assess the pattern of drug abuse among male adolescents in Hamadan. Methods: This study was a descriptive study and samples (n=400 were collected on the basis of snowball sampling method. Information was collected individually through completion of a researcher-designed questionnaire including demographic and epidemiological indices, perceived familial support, religiosity, and locus of control. Results: The results showed that smoking (93%, alcohol (92.5%, marijuana (64.3%, and opium (57.8% use were very high, while LSD (4.8% and Cocaine(2.3% use was rare. 77.8 % of adolescents began drug abuse between 12 and 18 years of age. Moreover, sensation seeking (26.5%, individual interest (24.8%, and peer pressure (22%, were the main reasons for drug abuse. Conclusion: As initial smoking, alcohol and marijuana use play an important role in determining the future addiction of adolescents to narcotics, yearly surveillance programs in the country and evaluation of etiological factors of narcotic addiction need to be studied carefully. All of the preventive and school programs designed for the young should take into account environmental, demographic and policy factors in addition to personal factors so that the programs have a maximum effect.

  2. Testing the "Sexually Abused-Abuser Hypothesis" in Adolescents: A Population-Based Study.

    Science.gov (United States)

    Aebi, Marcel; Landolt, Markus A; Mueller-Pfeiffer, Christoph; Schnyder, Ulrich; Maier, Thomas; Mohler-Kuo, Meichun

    2015-11-01

    A long-standing belief in the literature on sex offenders is that sexually victimized youths are at increased risk of becoming sex offenders themselves. The present study tested the link between past sexual abuse, either with or without contact, and sexually offending behavior in a representative sample of male and female adolescents while controlling for other types of abuse, mental health problems, substance use, and non-sexual violent behaviors. Self-reported data were collected from a nationally representative sample of 6,628 students attending 9th grade public school in Switzerland (3,434 males, 3,194 females, mean age = 15.50 years, SD = 0.66 years). Exposure to contact and non-contact types of sexual abuse was assessed using the Child Sexual Abuse Questionnaire and sexually offending behavior by the presence of any of three behaviors indicating sexual coercion. Two-hundred-forty-five males (7.1 %) and 40 females (1.2 %) reported having sexually coerced another person. After controlling for non-sexual abuse, low parent education, urban versus rural living, mental health problems, substance use, and non-sexual violent behavior, male adolescents who were victims of contact sexual abuse and non-contact sexual abuse were significantly more likely to report coercive sexual behaviors. Females who experienced contact or non-contact sexual abuse were also found at increased risk of committing sexual coercion after controlling for covariates. The present findings demonstrate a strong relationship between past sexual abuse, with and without physical contact, and sexual-offending behavior in male and female adolescents. Reducing exposure to non-contact sexual abuse (like Internet-based sexual exploitation) should become a new area of sexual violence prevention in youths.

  3. Parent-adolescent report correspondence on adolescent substance abuse among teens in residential rehabilitation.

    Science.gov (United States)

    McGillicuddy, Neil B; Eliseo-Arras, Rebecca K

    2012-04-01

    Research on the correspondence between adolescent and parent reports of adolescent substance abuse has typically been conducted on adolescent outpatient treatment samples, or on non-treatment samples. In the current study, fifty adolescents receiving residential substance abuse treatment, and their parents were assessed separately regarding the teen's substance use (e.g., cigarettes, alcohol, marijuana, other illicit drugs) during the 90 days preceding adolescent treatment entry. Correspondence between reporters was for the most part fair to excellent, with observed discrepancies generally due to parents providing lower estimates of use than did adolescents. Multiple regression analysis revealed that higher discrepancy between reporters occurred when the parent was younger, when the parent encountered fewer problems due to the teen's substance use, when the adolescent attended more probation or parole meetings, the fewer the number of days the adolescent was incarcerated, and the fewer days the adolescent lived at home prior to treatment. Results from exploratory analyses suggest that parents and adolescents are more discrepant when the assessment occurs later in the adolescent's treatment program. Overall, results suggest that in the absence of a cooperative teen, parental report of the adolescent's previous substance use could serve as a good proxy among families in which the adolescent is entering residential substance abuse treatment.

  4. Inhalant abuse by adolescents: A new challenge for Indian physicians

    Directory of Open Access Journals (Sweden)

    Basu Debasish

    2004-06-01

    Full Text Available Inhalant abuse has been commonly reported especially in the young during the last decades globally. The reason for the relative paucity of literature from India may be attributed to a lack of knowledge about this growing problem among health professionals. A series of five cases of inhalant abuse is described in order to understand this growing public health concern. Most of the cases started inhalant abuse during adolescence. All patients except one abused typewriter erasing fluid and thinner which contains toluene. All the patients reported using inhalants as addictive substance because of their easy accessibility, cheap price, their faster onset of action and the regular ′high′ that it provided. Whereas several features of inhalant dependence were fulfilled, no physical withdrawal signs were observed. The diagnosis of inhalant abuse can be difficult and relies almost entirely on clinical judgment. Treatment is generally supportive.

  5. The Psychiatric Consequences of Child and Adolescent Sexual Abuse

    Science.gov (United States)

    YÜCE, Murat; KARABEKİROĞLU, Koray; YILDIRIM, Zeynep; ŞAHİN, Serkan; SAPMAZ, Dicle; BABADAĞI, Zehra; TURLA, Ahmet; AYDIN, Berna

    2015-01-01

    Introduction The purpose of this study was to investigate the psychiatric consequences of sexual abuse and its associated factors in children and adolescents referred to our child and adolescent psychiatry clinic from official medico–legal units. Methods All victims of sexual abuse (n=590) aged 1–18 (mean: 13.56±3.38) referred from forensic units to Ondokuz Mayis University Child and Adolescent Psychiatry Clinic over a period of 2 years [boys: 83 (14.1%); girls: 507 (85.9%)] were included. Child and adolescent psychiatry and forensic medicine specialists evaluated all the cases. The Wechsler Intelligence Scale for Children-Revised Form (WISC-R) and the Schedule for Affective Disorders and Schizophrenia for School Age Children-Present and Lifetime Version-Turkish Version (K-SADS-PL-T) were applied. Results Abuse-related psychiatric diagnoses (of which 45.9% were major depressive disorder and 31.7% were post-traumatic stress disorder cases) were made in 75.2% of the cases. In 80.3% of the cases, the perpetrators were known to their victims [incest, n=91 (15.1%)], and intercourse took place in 48.8%. Although gender and age were not significantly associated with the appearance of any psychiatric disorders, severity of abuse (e.g., intercourse; p=.006), additional physical assault (pabuse severity, incest, involvement of any other victim, additional physical assault, and length of time from first abuse to first psychiatric evaluation. This combination of variables (occurrence of incest, additional physical assault, and a long duration from first abuse to first psychiatric evaluation) significantly predicted the appearance of a psychiatric disorder of any kind (χ2=55.42; df=7; n=522; pabuse to first psychiatric evaluation predict higher rates of sexual abuse-related psychiatric disorders.

  6. Study of Fifteen Runaway Patients.

    Science.gov (United States)

    Benalcazar, Becquer

    1982-01-01

    Studied 15 adolescent runaways in an inpatient long-term treatment setting. Results showed that more runaways were male, and most were away only a short time. In many cases, behavior improvement resulted. Impulsive behavior and anxiety were related to the short time and distance of elopement. (Author/JAC)

  7. Why adolescents use substances of abuse.

    Science.gov (United States)

    Duhigg, Daniel

    2013-08-01

    In summary, adolescent substance use is associated with a variety of risks. Using a nonjudgmental and collaborative approach to treating adolescent substance users can yield positive results. Motivational interviewing and the adolescent community reinforcement approach are evidence-based, nonpharmacologic treatments for teens with substance use disorders.

  8. A Model Adolescent Substance-Abuse Treatment Program.

    Science.gov (United States)

    Copans, Stuart

    1993-01-01

    Describes two adolescent substance abuse treatment programs in New England psychiatric center: Osgood Three, which is no longer in existence, and Tyler Three, which replaced it and is struggling to grow. Considers transition from Osgood Three to Tyler Three, process of change, and learning what can be preserved from past and what must be…

  9. Social Resource Characteristics and Adolescent Substance Abuse Relapse.

    Science.gov (United States)

    Vik, Peter W.; And Others

    1992-01-01

    Examined social resource network characteristics of adolescent substance abusers (n=19). Perceived similarity to one's social network emerged as important moderator of whether social network provided support to remain abstinent or elevated risk for relapse. Increased perceived support predicted continued posttreatment abstinence when recovering…

  10. Substance Abuse Minimization: Conceptualizing Prevention in Adolescent and Youth Programs.

    Science.gov (United States)

    Gullotta, Thomas; Adams, Gerald R.

    1982-01-01

    This article provides an overview of the historical and theoretical work on adolescent substance abuse with implications for preventive interventions. The focus is on illustration of the use of four basic prevention tools: education, competency promotion, community mobilization, and natural care giving. (Author)

  11. Early Adolescent Substance Use/Abuse in Rural Northern Michigan.

    Science.gov (United States)

    Sarvela, Paul D.; McClendon, E. J.

    Basic research and programs in substance abuse dealing directly with rural and small town populations lag far behind those aimed at urban groups, in both quality and quantity. A study was conducted to identify factors related to substance use by a preadolescent and early adolescent rural and small town population. Data were collected from 496…

  12. The relationship between adolescent depressive symptomology and substance abuse

    Directory of Open Access Journals (Sweden)

    L.G. Blore

    2004-09-01

    Full Text Available The research aimed to investigate the phenomena of adolescent depressive symptomology, substance abuse and the relationship between the two phenomena in a South African context. The influence of moderator variables was also examined. Another objective was to determine risk factors for the before mentioned. This was done by using a questionnaire with a sample of 1298 conveniently selected adolescents in a South African high school. It was determined that adolescents become progressively unhappier from 13 to 17 years of age. Girls are more depressed than boys. This research also revealed that adolescent depressive symptomology is significantly and positively correlated with earlier age of onset of substance abuse as well as frequency of usage. There appear to be no gender differences in substance abuse but teenagers from different ethnic and language groups differ in their use of substances. Risk factors for depression and substance abuse included a conflict relationship with parents, the experience of major stressful events, dissatisfaction with school grades and friends’ use of substances.

  13. Adolescent Substance Abuse Treatment: Organizational Change and Quality of Care

    Science.gov (United States)

    Rieckmann, Traci; Fussell, Holly; Doyle, Kevin; Ford, Jay; Riley, Katherine J.; Henderson, Stuart

    2011-01-01

    Substance abuse treatment agencies serving youth face unique barriers to providing quality care. Interviews with 17 adolescent programs found that family engagement, community involvement, and gender and diversity issues affected treatment delivery. Programs report organizational change efforts with implications for future process improvement…

  14. Child Abuse and Mental Disorders in Iranian Adolescents

    Directory of Open Access Journals (Sweden)

    Azar Pirdehghan

    2016-01-01

    Full Text Available Background Child abuse is a serious social health problem all over the world with important adverse effects. Objectives The aim of this study was to extend our understanding of the relation between mental disorders and child abuse. Materials and Methods The study was designed as a cross-sectional survey on 700 students in secondary schools using multiple cluster sampling in Yazd, Iran in 2013. We applied 2 self reported questionnaires: DASS (depression anxiety stress scales-42 for assessing mental disorders (anxiety, stress and depression and a standard self-reported valid and reliable questionnaire for recording child abuse information in neglect, psychological, physical and sexual domains. The collected data was analyzed using SPSS software. P-values < 0.05 were considered as significant. Results There was a statically significant correlation between mental disorder and child abuse score (Spearman rho: 0.2; P-value < 0.001. The highest correlations between mental disorders and child abuse were found in psychological domain, Spearman’s rho coefficients were 0.46, 0.41 and 0.36 for depression, anxiety and stress respectively (P-value < 0.001. Based on the results of logistic regression for mental disorder, females, last born adolescents and subjects with drug or alcohol abuser parents had mental disorder odds of 3, 0.4 and 1.9 times compared to others; and severe psychological abuse, being severely neglected and having sexual abuse had odds 90, 1.6 and 1.5 respectively in another model. Conclusions Programming for mandatory reporting of child abuse by physicians and all health care givers e.g. those attending schools or health centers, in order to prevent or reduce its detrimental effects is useful and success in preventing child abuse could lead to reductions in the prevalence of mental disorders.

  15. Adolescent Substance Abuse: Risk Factors and Prevention Strategies. Maternal & Child Health Technical Information Bulletin.

    Science.gov (United States)

    Werner, Mark J.

    The high prevalence of alcohol and substance abuse by adolescents poses a significant threat to the wellness of youth. Adolescents appear to use drugs for a variety of reasons. In addition to the multiple etiologic and risk factors present for substance abuse, there are many pathways teenagers may follow on their way to substance abuse. The…

  16. Do Parents Blame or Doubt Their Child More when Sexually Abused by Adolescents versus Adults?

    Science.gov (United States)

    Walsh, Wendy A.; Cross, Theodore P.; Jones, Lisa M.

    2012-01-01

    Although the importance of parental support for child sexual abuse victims is well documented, the nature of parental support for victims sexually abused by adolescents is less understood. In this exploratory study, we examine whether parents differ in their levels of blame or doubt for their child when sexually abused by adolescents versus…

  17. Inhalant and Prescription Medication Abuse among Adolescents: An Inexpensive, Accessible, and Misperceived Trend

    Science.gov (United States)

    Sikes, April; Walley, Cynthia; McBride, Rebecca; Fusco, Angela; Cole, Rebekah F.; Lauka, Justin

    2011-01-01

    Inhalant and prescription medication abuse, particularly among adolescents, are serious problems in our society. Several risk factors associated with inhalant and medication abuse among adolescents have been identified. As a result, adolescents may suffer multiple consequences in a range of developmental areas. The purpose of this article is to…

  18. Adolescent Alcohol Abuse. Fastback Series No. 217.

    Science.gov (United States)

    Horton, Lowell

    This booklet examines the problem of alcohol use among American teenagers. The role that alcohol plays in adult society is presented and its potential danger for causing teenage alcohol addiction is considered. A discussion on why some teenagers abuse alcohol focuses on familial, peer, sociocultural, environmental, personality, and behavioral…

  19. Adolescent Drug Abuse and Alcoholism: Directions for the School and the Family.

    Science.gov (United States)

    Smith, Elsie J.

    1981-01-01

    Examines the extent of adolescent drug abuse and alcoholism, psychological factors that lead to drug abuse and drinking, and treatment approaches that have been used with young people. Focuses on drug-abusing family systems and the roles of the school and the community in combatting drug abuse. (Author/GC)

  20. Item Response Theory Analysis of DSM-IV Cannabis Abuse and Dependence Criteria in Adolescents

    Science.gov (United States)

    Hartman, Christie A.; Gelhorn, Heather; Crowley, Thomas J.; Sakai, Joseph T.; Stallings, Michael; Young, Susan E.; Rhee, Soo Hyun; Corley, Robin; Hewitt, John K.; Hopfer, Christian J.

    2008-01-01

    A study to examine the DSM-IV criteria for cannabis abuse and dependence among adolescents is conducted. Results conclude that abuse and dependence criteria were not found to affect the different levels of severity in cannabis use.

  1. Heavy metal music and drug abuse in adolescents.

    Science.gov (United States)

    King, P

    1988-04-01

    A large number of adolescents in a psychiatric population, particularly those who are chemically dependent, prefer to listen to heavy metal music. Young people who do not identify with traditional values may find simple but unconventional answers to complex problems in the lyrics of this type of music. While a clearcut relationship cannot be established between heavy metal music and destructive behavior, evidence shows that such music promotes and supports patterns of drug abuse, promiscuous sexual activity, and violence.

  2. The Temporal Association Between Traditional and Cyber Dating Abuse Among Adolescents.

    Science.gov (United States)

    Temple, Jeff R; Choi, Hye Jeong; Brem, Meagan; Wolford-Clevenger, Caitlin; Stuart, Gregory L; Peskin, Melissa Fleschler; Elmquist, JoAnna

    2016-02-01

    While research has explored adolescents' use of technology to perpetrate dating violence, little is known about how traditional in-person and cyber abuse are linked, and no studies have examined their relationship over time. Using our sample of 780 diverse adolescents (58 % female), we found that traditional and cyber abuse were positively associated, and cyber abuse perpetration and victimization were correlated at each time point. Cyber abuse perpetration in the previous year (spring 2013) predicted cyber abuse perpetration 1 year later (spring 2014), while controlling for traditional abuse and demographic variables. In addition, physical violence victimization and cyber abuse perpetration and victimization predicted cyber abuse victimization the following year. These findings highlight the reciprocal nature of cyber abuse and suggest that victims may experience abuse in multiple contexts.

  3. Helping Affluent Families Help Their Acting-Out, Alienated Drug Abusing Adolescent

    Science.gov (United States)

    Bratter, Thomas Edward

    1974-01-01

    Suggests that the psychotherapist working with families of adolescent drug abuser must work for parental involvement, strengthening of the family group, and increased adolescent responsibility and independence from parents who unwittingly encourage a prolonged symbiotic relationship. (Author/CJ)

  4. Runaway Youths: Families in Conflict.

    Science.gov (United States)

    Beyer, Margaret; And Others

    The Hamden Mental Health Service staff collaborated with the police on a joint research project concerning runaway youth. The data suggest that adolescents who run away come from broken homes where disruption during preadolescence has been associated with parental separation and remarriage. These adolescents often exhibit symptoms of depression…

  5. Drugs of abuse and the adolescent athlete

    Directory of Open Access Journals (Sweden)

    Rogol Alan D

    2010-02-01

    Full Text Available Abstract Doping with endocrine drugs is quite prevalent in amateur and professional athletes. The World Anti-Doping Agency (WADA has a list of banned drugs for athletes who compete and a strategy to detect such drugs. Some are relatively easy, anabolic steroids and erythropoietin, and others more difficult, human growth hormone (rhGH and insulin like growth factor I (IGF-I. The use of such compounds is likely less in adolescent athletes, but the detection that much more difficult given that the baseline secretion of the endogenous hormone is shifting during pubertal development with the greatest rise in testosterone in boys occuring about the time of peak height velocity and maximal secretion of hGH and IGF-I. This review notes the rationale, physiology, performance enhancement, adverse events and the detection of doping with insulin, rhGH, rhIGF-I, erythropoietin, and anabolic-androgenic steroids.

  6. Occurrence of Child and Adolescent Abuse in Caruaru-PE

    Directory of Open Access Journals (Sweden)

    Ana Flávia GRANVILLE-GARCIA

    2006-04-01

    Full Text Available Objective: Verify the occurrence of child and adolescent abuse referred to Caruaru Tutelary Council between 2002 and 2004. Method: To this end, data on the complaints lodged in the period concerned was requested from the Tutelary Council. Results: From a total of 798 cases reported the most common was neglect (49.24% followed by psychological violence (28.94%. Physical and sexual abuse represented 17.6% and 4.66% of the total of the sample, respectively. As to sex, males represented 55.3% of the cases reported. Conclusion: According to literature, lesions are most frequent on the orofacial area. The awareness of such a piece of information makes a high demand for dental surgeons´ ethical and legal responsibility. Besides reporting suspect child abuse to authorities, there is now a call for creating protective mechanisms for the abused in addition to preventive educational campaigns with focus on the need for denouncing and avoiding all kinds of maltreatment.

  7. The impact of abuse and learning difficulties on emotion understanding in late childhood and early adolescence

    DEFF Research Database (Denmark)

    Pons, Francisco; De Rosnay, Marc; Bender, Patrick Karl

    2014-01-01

    and learning difficulties on simple and complex components of emotion understanding in late childhood and early adolescence. A total of 28 older children and young adolescents were selected for the study. Half of the participants had suffered from severe abuse, and half of these abused children additionally...

  8. Temperament Pathways to Childhood Disruptive Behavior and Adolescent Substance Abuse: Testing a Cascade Model

    Science.gov (United States)

    Martel, Michelle M.; Pierce, Laura; Nigg, Joel T.; Jester, Jennifer M.; Adams, Kenneth; Puttler, Leon I.; Buu, Anne; Fitzgerald, Hiram; Zucker, Robert A.

    2009-01-01

    Temperament traits may increase risk for developmental psychopathology like Attention-Deficit/Hyperactivity Disorder (ADHD) and disruptive behaviors during childhood, as well as predisposing to substance abuse during adolescence. In the current study, a cascade model of trait pathways to adolescent substance abuse was examined. Component…

  9. The Social Ecology of Adolescent-Initiated Parent Abuse: A Review of the Literature

    Science.gov (United States)

    Hong, Jun Sung; Kral, Michael J.; Espelage, Dorothy L.; Allen-Meares, Paula

    2012-01-01

    This article provides an ecological framework for understanding adolescent-initiated parent abuse. We review research on adolescent-initiated parent abuse, identifying sociodemographic characteristics of perpetrators and victims (e.g., gender, age, race/ethnicity, and socioeconomic status [SES]). Bronfenbrenner's [1] ecological systems theory is…

  10. Effectiveness of Emotional Intelligence Group Training on Anger in Adolescents with Substance-Abusing Fathers

    Science.gov (United States)

    Hojjat, Seyed Kaveh; Rezaei, Mahdi; Namadian, Gholamreza; Hatami, Seyed Esmaeil; Norozi Khalili, Mina

    2017-01-01

    Parental substance abuse is associated with impaired skills and ability to take care of children. Children of substance-abusing parents display higher levels of emotional difficulties. This article shows the effectiveness of emotional intelligence group training on anger in adolescents with substance-abusing fathers. The sample consisted of 60…

  11. The Relationship between Mental Health and Substance Abuse among Adolescents. Analytic Series: A-9.

    Science.gov (United States)

    Ragin, Ann; Rasinski, Kenneth A.; Cerbone, Felicia Gray; Johnson, Robert A.

    This report presents an examination of the association between psychological functioning and substance abuse among adolescents aged 12 to 17 using data from the 1994-1996 National Household Survey on Drug Abuse (NHSDA). The survey, conducted annually by Substance Abuse and Mental Services Administration (SAMHSA), provides estimates of the…

  12. Children of substance abusers: psychosocial profile of children and adolescents

    Directory of Open Access Journals (Sweden)

    Camila Garcia de Grandi

    2014-08-01

    Full Text Available Introduction: Psychoactive substance abuse problems in the family have an impact on the development of children and adolescents. This risk conditions can harm mental health and hinder healthy development in psychosocial areas. Objectives: This study investigated the psychosocial profile of children and adolescents assisted in a prevention service center for children of substance abusers in a deprived community located in the outskirts of Sao Paulo. Methods: Exploratory and descriptive study, based on cross-sectional methodology and a convenience sample of 791 children and adolescents assisted at the Intervention and Support Center for Children of Substance Abusers - CUIDA between January 2001 and December 2008. The sample was divided into groups according to discharge status: Active, Therapeutic Discharge (TD, Abandonment, Without Information about the Reason for Leaving and With Information about the Length of Treatment (WIRL, Without Information (WI, and Other Reasons for Leaving (OR. Results: In the Active group, 26% of mothers had completed high-school and 11% belonged to the A/B socioeconomic classes. The TD group showed the highest percentages of wage earning parents (52% living together (64%. In the WIRL group, 17% of the mothers were illiterate or had not completed primary education, and 23% of the fathers were unemployed. In the WI group, 22% lived in houses that had been lent to them. Conclusions: Results indicate the impact of addiction and underprivileged conditions (such as housing status, fathers’ level of education, and socioeconomic status on retention in the service and the importance of health prevention and promotion strategies aimed at this population.

  13. [Behavioral disorders and substance abuse in adolescents with mental retardation].

    Science.gov (United States)

    Papachristou, Ec; Anagnostopoulos, Dk

    2014-01-01

    normal intelligence adolescents with behavioral disorders. Risk factors that increase the chances of developing either simple or more complicated types of psychopathology in adolescents with mental retardation have been found to be based on individual, family and social levels. On the other hand, the individual characteristics of adolescents (intellectual level, attention capacity, understandable linguistic expression, overall progress until adolescence), the existence of a supportive family environment and the presence of social support and awareness through the creation of special counseling, education and medical services, are the most important protective factors which contribute to the prevention of several forms of psychopathology in adolescents with mental retardation. For the writing of the literature review, the following electronic databases were used: PubMed, Scopus, Psycinfo, Cochrane Library, Web of Science and Google Scholar. The key words used were: Intellectual Disability, Behavioral disorders, Adolescents, Mental Retardation, Learning disabilities, Developmental Disabilities, Disruptive behaviour disorders, Conduct disorder, Substance Abuse, Substance Misuse, Oppositional defiant disorder, Alcohol and illicit drug use, Smoking Use, Young people, Teenagers, Youths.

  14. Adolescent Marijuana Abusers and Their Families. Research Monograph Series, No. 40.

    Science.gov (United States)

    Hendin, Herbert; And Others

    Substantial evidence is accumulating which emphasizes the significant role of the family for drug abusing adolescents. To investigate the influence of the family on adolescents (N=17) involved in heavy marihuana use, interviews with family members, case studies of each adolescent, and psychological evaluations were conducted to determine the…

  15. The ecology of adolescent substance abuse service utilization.

    Science.gov (United States)

    Jones, Diana L; Heflinger, Craig Anne; Saunders, Robert C

    2007-12-01

    This paper presents an ecological-community model toward the explanation of variation in patterns of substance abuse (SA) service utilization among adolescents who are enrolled in Tennessee's Medicaid program (TennCare). Guided by a theoretical framework that draws from the social ecology work of Bronfenbrenner and health services utilization models promoted by Aday and Andersen, we apply a social indicators approach toward explaining the impact of community ecology on identification of SA and treatment engagement. Both county-level rates and individual-level treatment utilization are examined and hierarchical linear modeling is incorporated to examine the individual-in-community phenomenon. This study is an expansion of previous service utilization research and suggests that explanations of youth's service utilization must necessarily include not only individual, familial, and service system characteristics, but community factors, as well.

  16. Nicotine, adolescence, and stress: A review of how stress can modulate the negative consequences of adolescent nicotine abuse.

    Science.gov (United States)

    Holliday, Erica; Gould, Thomas J

    2016-06-01

    In order to continue the decline of smoking prevalence, it is imperative to identify factors that contribute to the development of nicotine and tobacco addiction, such as adolescent initiation of nicotine use, adolescent stress, and their interaction. This review highlights the biological differences between adolescent and adults in nicotine use and resulting effects, and examines the enduring consequences of adolescent nicotine administration. A review of both clinical and preclinical literature indicates that adolescent, but not adult, nicotine administration leads to increased susceptibility for development of long-lasting impairments in learning and affect. Finally, the role stress plays in normal adolescent development, the deleterious effects stress has on learning and memory, and the negative consequences resulting from the interaction of stress and nicotine during adolescence is reviewed. The review concludes with ways in which future policies could benefit by addressing adolescent stress as a means of reducing adolescent nicotine abuse.

  17. Forced migration and sexual abuse: experience of Congolese adolescent girls in Kigeme refugee camp, Rwanda

    Directory of Open Access Journals (Sweden)

    Innocent Iyakaremye

    2016-05-01

    Full Text Available Background This study deals with the link between forced migration and sexual abuse, with a special focus on adolescent girls. Existing literature associates forced migration with sexual abuse and identifies adolescent girls as the most vulnerable. However, little is known about the situation of sexual abuse among Congolese refugees in Rwanda since their arrival in 2012 due to the conflict between Congolese government forces and the M23 rebel group. This study was initiated to explore the situation of sexual abuse of Congolese adolescent girls in Kigeme camp and to suggest remedial strategies. Participants and procedure Qualitative data were collected through individual interviews and focus group discussions (FGDs with adolescent girls. Interviews also involved parents, boys, camp authorities, and neighbouring citizens. Results The findings show that rape, unwanted physical touching, sexual exploitation, commercial sex, early marriage and girl trafficking are the main forms of sexual abuse. These are facilitated by the miserable life in the camp, shortcomings in the camp layout and security system, and adolescent developmental stage. They negatively impact girls’ reproductive health, social integration and mental health. Conclusions Existing strategies to address sexual abuse in the camp have had positive but insufficient results, and thus need to be improved and reinforced. Improvement is suggested in the areas of the abuse reporting system, the camp layout and security system, involvement of men and youth, and the consolidation of anti-GBV (gender-based violence clubs.

  18. Relapse Among Adolescent Drug Abusers Following Treatment: The Role of Probable ADHD Status

    Science.gov (United States)

    Latimer, William W.; Ernst, Jenna; Hennessey, Jodi; Stinchfield, Randy D.; Winters, Ken C.

    2004-01-01

    This is a report on a sample of adolescent drug abusers in treatment (N = 220) to estimate the degree to which probable ADHD status increases the odds of posttreatment alcohol, marijuana, and other drug relapse during the initial 6 months following discharge. Drug abusing youth with probable ADHD status exhibited 2.5 times the risk of…

  19. Psychic Symptomatology as Predictor to Outcome of Treatment for Adolescent Drug Abusers.

    Science.gov (United States)

    Friedman, Alfred S.; Terras, Arlene

    1996-01-01

    Study of 176 adolescent drug abusers found that greater psychopathology at pretreatment was not found to be related to less improvement in drug treatment. For the male subsample, greater paranoid trends predicted to less reduction in substance use/abuse. Borderline psychotic symptomatology predicted to more improvement. (RJM)

  20. Child/Adolescent Abuse and Suicidal Behavior: Are They Sex Related?

    Science.gov (United States)

    Gal, Gilad; Levav, Itzhak; Gross, Raz

    2012-01-01

    The association between childhood and adolescent abuse and suicidal behavior, and the possible contribution of abuse to sex differences in non lethal suicidal behavior, was investigated. Data were extracted from the Israel-based component of the WHO World Mental Health Survey (Kessler & Utsun, 2008a). Increased risk for ideation, plan, and…

  1. Trajectories of Childhood Aggression and Inattention/Hyperactivity: Differential Effects on Substance Abuse in Adolescence

    Science.gov (United States)

    Jester, Jennifer M.; Nigg, Joel T.; Buu, Anne; Puttler, Leon I.; Glass, Jennifer M.; Heitzeg, Mary M.; Fitzgerald, Hiram E.; Zucker, Robert A.

    2008-01-01

    335 children of alcoholic and nonalcoholic fathers were examined to study the relation between childhood behavior trajectories and adolescent substance abuse. Findings suggested that children with both aggression and inattention/hyperactivity were at an increased risk of substance abuse when compared to children with only inattention/hyperactivity…

  2. The Relationships between Recreational Drug Abuse and School Records among Korean Adolescents

    Science.gov (United States)

    Kim, Dong-Hyun; So, Wi-Young

    2017-01-01

    Background: Recreational drug abuse control has long been a major goal of global health and social welfare organizations. Objective: The purpose of this study was to examine the possible associations between recreational drug abuse and Korean adolescents' school records. Methods: In 2012, 74,186 seventh- through twelfth-grade students participated…

  3. The Role of Adolescent Physical Abuse in Adult Intimate Partner Violence

    Science.gov (United States)

    Sunday, Suzanne; Kline, Myriam; Labruna, Victor; Pelcovitz, David; Salzinger, Suzanne; Kaplan, Sandra

    2011-01-01

    This study's primary aims were to examine whether a sample of young adults, aged 23 to 31, who had been documented as physically abused by their parent(s) during adolescence would be more likely to aggress, both physically and verbally, against their intimate partners compared with nonabused young adults and whether abuse history was (along with…

  4. Attributions and Coping in Sexually Abused Adolescents Referred for Group Treatment

    Science.gov (United States)

    Daigneault, Isabelle; Hebert, Martine; Tourigny, Marc

    2006-01-01

    This study aims to assess the predictive value of two sets of variables, self-attributions, and coping behaviors, on sexually abused (SA) teenagers' functioning, while controlling for abuse-related and family variables. A total of 103 female adolescents completed self-report measures to assess their psychological functioning in terms of anxiety,…

  5. A Multi-Dimensional Model of Groupwork for Adolescent Girls Who Have Been Sexually Abused.

    Science.gov (United States)

    Lindon, Jillian; Nourse, Carol A.

    1994-01-01

    A treatment approach for sexually abused adolescent girls, using a group work model, incorporated three treatment modalities: a skills component, a psychotherapeutic component, and an educative component. Abused girls demonstrated difficulties in many areas of their lives. The six participants showed improvement according to self-statements and…

  6. Sex education for young adolescents :enhancing parental involvement

    OpenAIRE

    Guillory, Dorothy

    1993-01-01

    The frequent incidence and seriousness of youth problems such as delinquency, runaways, drug abuse, and suicide create significant social problems. The tumultuous nature of adolescence, which offers a tremendous challenge to families, has captured the public's attention through adolescent sexuality (Herz, Goldberg, & Reis, 1984; Trussell, 1988). Considered a serious national health issue, the sexual behavior of adolescents is an area of increased concern as is the inci...

  7. Child Abuse and Aids-Related Knowledge, Attitudes and Behavior among Adolescents in Zambia

    Science.gov (United States)

    Slonim-Nevo, Vered; Mukuka, Lawrence

    2007-01-01

    Objective: To research the correlation between physical and sexual abuse by family members and AIDS-related knowledge, attitudes, self-efficacy and behavior among urban and rural adolescents in Zambia. Sample: The sample comprises 3,360 adolescents, aged 10-19, from urban and rural Zambia; 2,160 of them attended school, while 1,200 of them did…

  8. An Experimental Test of a Craving Management Technique for Adolescents in Substance-Abuse Treatment

    Science.gov (United States)

    Florsheim, Paul; Heavin, Sarah; Tiffany, Stephen; Colvin, Peter; Hiraoka, Regina

    2008-01-01

    This paper describes an experiment designed to test an imagery-based craving management technique with a sample of adolescents diagnosed with substance-use disorders. Seventy adolescents between the ages of 14 and 18 (41 males) were recruited through two substance-abuse treatment programs. The experimental procedure involved stimulating craving…

  9. The use and abuse of prescription medication to facilitate or enhance sexual behavior among adolescents.

    Science.gov (United States)

    Apodaca, T R; Moser, N C

    2011-01-01

    Adolescents naturally experience an increased interest in sexual behavior, but they usually lack much experience. Thus, any prescription medication that holds the potential to ease or facilitate sexual matters holds a unique allure. Widespread cultural awareness of medications to treat erectile dysfunction (ED) has combined with a recent trend toward increased adolescent prescription drug abuse to create unique challenges for industry, clinicians, and researchers.

  10. The Use of Therapeutic Stories in Counseling Child and Adolescent Sexual Abuse Survivors

    Science.gov (United States)

    Kress, Victoria E.; Adamson, Nicole A.; Yensel, Jennifer

    2010-01-01

    Counselors will regularly counsel children and adolescents with histories of sexual abuse and be challenged with providing supportive and empowering interventions that serve to move the client from victim to survivor status. Therapeutic stories are a creative counseling technique that can be used when counseling child and adolescent sexual abuse…

  11. Alcohol Abuse and Truancy among Spanish Adolescents: A Count-Data Approach

    Science.gov (United States)

    Duarte, R.; Escario, J. J.

    2006-01-01

    Alcohol abuse and truancy are two widespread problems among the adolescent Spanish population. Given the negative consequences of both behaviours for human capital acquiring and their origin in adolescence, our study lies in analysing the relationship between these risk behaviours. From a methodological point of view, our contribution consists of…

  12. Amygdala habituation to emotional faces in adolescents with internalizing disorders, adolescents with childhood sexual abuse related PTSD and healthy adolescents

    Directory of Open Access Journals (Sweden)

    Bianca G. van den Bulk

    2016-10-01

    Full Text Available Adolescents with internalizing disorders and adolescents with childhood sexual abuse related post-traumatic stress disorder (CSA-related PTSD show a large overlap in symptomatology. In addition, brain research indicated hyper-responsiveness and sustained activation instead of habituation of amygdala activation to emotional faces in both groups. Little is known, however, about whether the same patterns of amygdala habituation are present in these two groups. The current study examined habituation patterns of amygdala activity to emotional faces (fearful, happy and neutral in adolescents with a DSM-IV depressive and/or anxiety disorder (N = 25, adolescents with CSA-related PTSD (N = 19 and healthy controls (N = 26. Behaviourally, the adolescents from the internalizing and CSA-related PTSD group reported more anxiety to fearful and neutral faces than adolescents from the control group and adolescents from the CSA-related PTSD group reacted slower compared to the internalizing group. At the whole brain level, there was a significant interaction between time and group within the left amygdala. Follow-up ROI analysis showed elevated initial activity in the amygdala and rapid habituation in the CSA-related PTSD group compared to the internalizing group. These findings suggest that habituation patterns of amygdala activation provide additional information on problems with emotional face processing. Furthermore, the results suggest there are differences in the underlying neurobiological mechanisms related to emotional face processing for adolescents with internalizing disorders and adolescents with CSA-related PTSD. Possibly CSA-related PTSD is characterized by a stronger primary emotional response driven by the amygdala.

  13. Post-traumatic stress disorder symptom clusters predicting substance abuse in adolescents

    DEFF Research Database (Denmark)

    Donbaek, Dagmar Feddern; Elklit, Ask; Pedersen, Mads Uffe

    2014-01-01

    . Therefore, we studied this issue in relation to alcohol abuse (AA) and drug abuse (DA) in a probability sample of Danish 15- to 18-year-olds (n=1,988) in the form of an online survey using self-report questionnaires following the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM......The majority of studies exploring the mental health disorders posttraumatic stress disorder and substance use disorders (substance abuse and dependence) have shown high co-morbidity rates in adolescents, indicating a well-established relationship. However, only a few studies have attempted...... disorders in adolescents whilst underpinning the importance of acknowledging the specific functional mechanisms underlying the common co-occurrence of PTSD and substance abuse in adolescence....

  14. Sexual abuse and violence among adolescent girls in Botswana: a mental health perspective.

    Science.gov (United States)

    Seloilwe, Esther Salang; Thupayagale-Tshweneagae, Gloria

    2009-07-01

    The presence of sexual abuse among societies in Botswana is a phenomenon whose occurrence is usually denied albeit the police report on it and legal frameworks have been established to combat it. Several factors influence the concealment of sexual abuse among adolescent girls, which includes cultural factors and social status of the perpetrators. This paper espouses the concept of sexual abuse among adolescent girls, the existence of the problem, its magnitude, the factors that increase vulnerability to violence and abuse, and how these factors intersect with HIV and AIDS. Two case studies using a discovery method were used to explore the phenomenon under the study. The findings of the study indicated that sexual abuse and violence have profound mental health consequences including guilt, anxiety, depression and anger. Future research is suggested to explore this problem on a wider scale and develop interventions that can assist victims and perpetrators to cope with the situation.

  15. The influence of childhood sexual abuse on adolescent outcomes: the roles of gender, poverty, and revictimization.

    Science.gov (United States)

    Matta Oshima, Karen M; Jonson-Reid, Melissa; Seay, Kristen D

    2014-01-01

    Research on child sexual abuse has focused on adult revictimization and outcomes. This article examines the rate of child maltreatment revictimization among male and female children reported to child protective services for child sexual abuse and whether revictimization impacts outcomes. Using longitudinal administrative data, Cox regressions were used to examine relationships between initial report of child sexual abuse, maltreatment revictimization, and adolescent outcomes among children from poor and nonpoor families. Despite no significant differences in child sexual abuse rates between poor and nonpoor families, poor child sexual abuse victims were significantly more likely to have re-reports for maltreatment. Children with multiple reports were more likely to have negative outcomes. Interventions for child sexual abuse survivors should focus on preventing maltreatment recurrence generally and not ignore needs of male victims.

  16. Mental health of adolescents who abuse psychoactive substances in Enugu, Nigeria - A cross-sectional study

    Directory of Open Access Journals (Sweden)

    Igwe Wilson C

    2010-08-01

    Full Text Available Abstract Background Association between psychiatric morbidity and substance abuse among adolescent has been reported. However prevalence and pattern of such dysfunctions are unknown in our environment. Aims To determine the prevalence of psychosocial dysfunction and depressive symptoms among adolescents who abuse substance and also note the influence of socio-demographic factors and type of substance on the pattern of dysfuction. Method A cross-sectional study was carried out among 900 adolescents selected from 29 secondary schools in Enugu metropolis. A multi-stage sampling procedure was used to select the students. The student drug use questionnaire was used to screen respondents for substance abuse. Those who were abusing substance and matched controls (non substance abusers were assessed for psychiatric symptoms using the 35-item Paediatric Symptom Checklist (PSC and the Zung Self-rating Depression Scale (SDS. Social classification was done using the parental educational attainment and occupation. Result A total of 290 students were current substance abusers. The substances most commonly abused were alcohol (31.6%, cola nitida (kola nut (20.7% and coffee (15.7%. Using the PSC scale, 70 (24.1% subjects compared to 29 (10.7% of the controls had scores in the morbidity range of ≥ 28 for psychosocial dysfuction. This was statistically significant (χ2 = 17.57 p = 0.001. Fifty-four subjects (18.6% had scores in the morbidity range of ≥ 50 for depressive symptoms using the Zung SDS compared to 21 (7.7% of controls. This was statistically significant (χ2 = 14.43, p = 0.001. Prevalence of dysfunction was not significantly related to age in both subjects and controls (χ2 = 4.62, p = 0.010, χ2 = 4.8, p = 0.10 respectively. Also using both scales, there was no significant relationship between psychosocial dysfunction and gender or social class in both subjects and control. The prevalence of dysfuction using both scales was significantly higher

  17. Adolescent-onset alcohol abuse exacerbates the influence of childhood conduct disorder on late adolescent and early adult antisocial behaviour

    OpenAIRE

    Howard, Richard; Finn, Peter; Jose, Paul; Gallagher, Jennifer

    2011-01-01

    This study tested the hypothesis that adolescent-onset alcohol abuse (AOAA) would both mediate and moderate the effect of childhood conduct disorder on antisocial behaviour in late adolescence and early adulthood. A sample comprising 504 young men and women strategically recruited from the community were grouped using the criteria of the Diagnostic and Statistical Manual (DSM-IV, American Psychiatric Association. (1994). Diagnostic and statistical manual of mental disorders (4th ed.). Washing...

  18. Co-occurring disorders in the adolescent mental health and substance abuse treatment systems.

    Science.gov (United States)

    Turner, Win C; Muck, Randolph D; Muck, Rebekah J; Stephens, Robert L; Sukumar, Bhuvana

    2004-12-01

    This article explores the rates of co-occurring disorders in two large federally-funded programs that target youth. In the mental health treatment system, the Substance Abuse and Mental Health Services Administration's (SAMHSA) Center for Mental Health Services (CMHS) supports the Comprehensive Community Mental Health Services for Children and Their Families Program. SAMHSA's Center for Substance Abuse Treatment (CSAT) supports a number of grant programs providing substance abuse treatment for adolescents. The data from these programs underscores the need for the use of systematic, validated, biopsychosocial assessment instruments for all youth entering either the substance abuse or mental health treatment systems. The current evidence base for models of co-occurring treatment for youth is discussed and recommendations made for future activity related to adolescent co-occurring treatment.

  19. Proposal for a new detection method of substance abuse risk in Croatian adolescents

    Directory of Open Access Journals (Sweden)

    Sanja Tatalovic Vorkapic

    2011-01-01

    Full Text Available One of the most important factors of successful substance abuse treatment is the early start of the same treatment. Recent selection method for identification of Croatian adolescents in the substance abuse risk that has been using drug tests from urine samples, has been simple and exact on the one hand, but on the other, has been very rare and usually guided by the pressure of parents or the court. Besides, such method presented the source of legal and ethical questions. So, the proposal of application of standardized psychological tests during systematic medical exams of Croatian adolescents at the age range of 15-22 years could help with the early detection of those adolescents who were in the substance abuse risk or already had the developed addiction problem.

  20. Child and adolescent abuse and neglect in the city of Curitiba, Brazil.

    Science.gov (United States)

    da Silva Franzin, Lucimara Cheles; Olandovski, Márcia; Vettorazzi, Maria Lúcia Tozetto; Werneck, Renata Iani; Moysés, Samuel Jorge; Kusma, Solena Ziemer; Moysés, Simone Tetu

    2014-10-01

    Identify and analyze cases of child and adolescent abuse and neglect in Curitiba, Brazil. This is an exploratory descriptive study that takes a quantitative approach. Secondary data from the reporting registry of the Network for the Protection of Children and Adolescents at Risk for Violence in Curitiba, Brazil, dating from 2004 to 2009, were analyzed. Variables included the victims' sociodemographic profile, place of notification, type, nature and severity of abuse, information about the author of the aggression or abuse, and physical lesions. The frequency distribution and associations between the variables were analyzed using the Chi-square test at a 5% significance level. The analysis of 19,316 records showed that domestic violence, abuse and neglect directed against children and adolescents were the most frequently recorded situation, with 17,082 cases (88.4%) distributed in the following manner: neglect, with 9742 reports (57.0%); physical violence, with 1341 reports (7.9%); sexual violence, with 796 reports (4.7%); psychological violence, with 574 reports (3.4%); and abandonment, with 190 reports (1.1%). Of the total, 43.9% were considered severe cases. The most affected age group was between 5 and 14 years of age, with balance between genders. In the majority of cases, the mother was registered as the author of the abuse or neglect. Physical sequelae (20.2%) mostly affected the head and upper and lower limbs, with consequent lesions manifesting as bruises, cuts, and fractures. An increase in the visibility of domestic violence and children and adolescents abuse and neglect has been observed in the city during the last few years, suggesting the effectiveness of the reporting strategies proposed by the protection network. It is important to increase social security and public welfare policies to prevent child and adolescent abuse and neglect, focusing on family support.

  1. Medical treatment of the adolescent drug abuser. An opportunity for rehabilitative intervention.

    Science.gov (United States)

    Schonberg, S K

    1976-03-01

    Illnesses related to both the pharmacologic properties of abused substances and their methods of administration often bring the teenager to medical attention and may provide sufficient motivation for the adolescent to seek help beyond the acute problem. Successful treatment of an overdose reaction, an abstinence syndrome, or any other medical complication of drug abuse may give the physician a unique opportunity to begine further evalution for future care.

  2. Mediation effect of social skills between impulsivity with substance abuse in adolescents

    OpenAIRE

    Mehdi Poorkord; Sahar Mirghobad khodarahmi; Malihe yaghoobzadeh; Hasan Rezaee

    2013-01-01

    The aim of this study is to examine mediation effect of social skills between impulsivity with substance abuse in adolescents. The research sample consists of 616 students of vulnerable high schools in Ardabil City. Together the data of Impulsivity Scale, Matson social skills scale and substance abuse survey were used [Matson, J. L., Rotatori, A. F., & Helsel, W. J. (1983). Development of a rating scale to measure social skills in children: The Matson Evaluation of Social Skills with Youngste...

  3. Characterization of Adolescent Prescription Drug Abuse and Misuse Using the Researched Abuse Diversion and Addiction-Related Surveillance (RADARS[R]) System

    Science.gov (United States)

    Zosel, Amy; Bartelson, Becki Bucher; Bailey, Elise; Lowenstein, Steven; Dart, Rick

    2013-01-01

    Objective: To describe the characteristics and health effects of adolescent (age 13-19 years) prescription drug abuse and misuse using the Researched Abuse Diversion and Addiction-Related Surveillance (RADARS[R])) System. Method: Secondary analysis of data collected from RADARS System participating poison centers was performed. Data for all…

  4. Prevalence and Correlates of the Perpetration of Cyber Dating Abuse among Early Adolescents.

    Science.gov (United States)

    Peskin, Melissa F; Markham, Christine M; Shegog, Ross; Temple, Jeff R; Baumler, Elizabeth R; Addy, Robert C; Hernandez, Belinda; Cuccaro, Paula; Gabay, Efrat K; Thiel, Melanie; Emery, Susan Tortolero

    2017-02-01

    Much is known about the prevalence and correlates of dating violence, especially the perpetration of physical dating violence, among older adolescents. However, relatively little is known about the prevalence and correlates of the perpetration of cyber dating abuse, particularly among early adolescents. In this study, using a predominantly ethnic-minority sample of sixth graders who reported ever having had a boyfriend/girlfriend (n = 424, 44.2 % female), almost 15 % reported perpetrating cyber dating abuse at least once during their lifetime. Furthermore, using a cross-sectional design, across multiple levels of the socio-ecological model, the individual-level factors of (a) norms for violence for boys against girls, (b) having a current boyfriend/girlfriend, and (c) participation in bullying perpetration were correlates of the perpetration of cyber dating abuse. Collectively, the findings suggest that dating violence interventions targeting these particular correlates in early adolescents are warranted. Future studies are needed to establish causation and to further investigate the relative importance of correlates of the perpetration of cyber dating abuse among early adolescents that have been reported among older adolescents.

  5. Does physical abuse in early childhood predict substance use in adolescence and early adulthood?

    Science.gov (United States)

    Lansford, Jennifer E; Dodge, Kenneth A; Pettit, Gregory S; Bates, John E

    2010-05-01

    Prospective longitudinal data from 585 families were used to examine parents' reports of child physical abuse in the first 5 years of life as a predictor of substance use at ages 12, 16, and 24. Path analyses revealed that physical abuse in the first 5 years of life predicted subsequent substance use for females but not males. We found a direct effect of early physical abuse on girls'substance use at age 12 and indirect effects on substance use at age 16 and age 24 through substance use at age 12. For boys, age 12 substance use predicted age 16 substance use, and age 16 substance use predicted age 24 substance use, but physical abuse in the first 5 years of life was unrelated to subsequent substance use. These findings suggest that for females, a mechanism of influence of early physical abuse on substance use into early adulthood appears to be through precocious initiation of substance use in early adolescence.

  6. Adolescent-onset alcohol abuse exacerbates the influence of childhood conduct disorder on late adolescent and early adult antisocial behaviour.

    Science.gov (United States)

    Howard, Richard; Finn, Peter; Jose, Paul; Gallagher, Jennifer

    2011-12-16

    This study tested the hypothesis that adolescent-onset alcohol abuse (AOAA) would both mediate and moderate the effect of childhood conduct disorder on antisocial behaviour in late adolescence and early adulthood. A sample comprising 504 young men and women strategically recruited from the community were grouped using the criteria of the Diagnostic and Statistical Manual (DSM-IV, American Psychiatric Association. (1994). Diagnostic and statistical manual of mental disorders (4th ed.). Washington, DC: APA), as follows: neither childhood conduct disorder (CCD) nor alcohol abuse/dependence; CCD but no alcohol abuse or dependence; alcohol abuse/dependence but no CCD; both CCD and alcohol abuse/dependence. The outcome measure was the sum of positive responses to 55 interview items capturing a variety of antisocial behaviours engaged in since age 15. Severity of lifetime alcohol-related and CCD problems served as predictor variables in regression analysis. Antisocial behaviour problems were greatest in individuals with a history of co-occurring conduct disorder (CD) and alcohol abuse/dependence. While CCD was strongly predictive of adult antisocial behaviour, this effect was both mediated and moderated (exacerbated) by AOAA.

  7. The impact of abuse and learning difficulties on emotion understanding in late childhood and early adolescence.

    Science.gov (United States)

    Pons, Francisco; de Rosnay, Marc; Bender, Patrick K; Doudin, Pierre-André; Harris, Paul L; Giménez-Dasí, Marta

    2014-01-01

    Children's affective experiences and cognitive abilities have an impact on emotion understanding. However, their relative contribution, as well as the possibility of an interaction between them, has rarely been examined. The aim of the present study was to evaluate the influence of severe abuse and learning difficulties on simple and complex components of emotion understanding in late childhood and early adolescence. A total of 28 older children and young adolescents were selected for the study. Half of the participants had suffered from severe abuse, and half of these abused children additionally had learning disabilities. The remaining half of the sample had no history of abuse but were matched with the abused children on learning difficulties, age and gender. The participants' emotion understanding was assessed with the Test of Emotion Comprehension (TEC). Results showed that (a) learning difficulties but not abuse had an impact on emotion understanding, (b) there was no interaction effect of abuse and learning difficulties on emotion understanding, and (b) the observed effects of learning difficulties were most apparent for the understanding of relatively complex components of emotion and not for simple components. The results are discussed in terms of their theoretical and practical implications.

  8. Predictors of Physical Altercation among Adolescents in Residential Substance Abuse Treatment

    OpenAIRE

    Crawley, Rachel D.; Becan, Jennifer Edwards; Knight, Danica Kalling; Joe, George W.; Flynn, Patrick M.

    2015-01-01

    This study tested the hypothesis that basic social information-processing components represented by family conflict, peer aggression, and pro-aggression cognitive scripts are related to aggression and social problems among adolescents in substance abuse treatment. The sample consisted of 547 adolescents in two community-based residential facilities. Correlation results indicated that more peer aggression is related to more pro-aggression scripts; scripts, peer aggression, and family conflict ...

  9. Child Abuse and Mental Disorders in Iranian Adolescents

    OpenAIRE

    Azar Pirdehghan; Mahmood Vakili(PhD); Yavar Rajabzadeh; Mohammad Puyandehpour; Arezoo Aghakoochak

    2016-01-01

    Background Child abuse is a serious social health problem all over the world with important adverse effects. Objectives The aim of this study was to extend our understanding of the relation between mental disorders and child abuse. Materials and Methods The study was designed as a cross-sectional survey on 700 students in secondary schools using multiple cluster sampling in Yazd, I...

  10. Prevention of adolescent reoccurring violence and alcohol abuse: a multiple site evaluation.

    Science.gov (United States)

    Wodarski, John S

    2010-07-01

    "Prevention of Adolescent Reoccurring Violence and Alcohol Abuse: A Multiple Site Evaluation" is a multiple component alcohol abuse and violent behavior prevention strategy, targeted to adolescents ages 16-21 who have high levels of anger, or who are victims/perpetrators of violence, and their families. Three community centers located in upstate New York provided group participants (N = 210) known to have conduct disorder and substance abuse history. The centers were used as the intervention sites over a seven-week period with the youth assessment staff using objective screening measures. The participants were exposed to a two-pronged intervention, using a parental involvement cohort with approximately half of the study participants. The Teams, Games, and Tournaments strategy was the intervention method. Teams, Games, and Tournaments is a Social Learning Theory-based intervention with demonstrated empirical evidence of the model's effectiveness. A 2 x 3 factorial design with two follow-up points encompassed: anger control, alcohol/substance abuse, and family interactive education. The goals of the study were to help adolescents reduce their alcohol use, to increase productive family interaction, and ultimately to reduce the adolescents' aggression levels and subsequently reduce the possibility of their becoming victims or perpetrators of a violent crime. Consistent with Social Learning Theory, the Teams, Games, and Tournaments treatment intervention makes use of adolescents as peer counselors. The practical implications include that professionals or students in our public schools, juvenile courts, correctional institutions, and residential treatment centers can easily implement this program. A standardized treatment manual is available. It offers a complete, ready-to-use, and cost-effective tool for reducing adolescent violence and alcohol abuse. Further, the data provide support for a hypothesis of social learning theory, that is: interventions using multiple

  11. Emergence of sex differences in the development of substance use and abuse during adolescence.

    Science.gov (United States)

    Kuhn, Cynthia

    2015-09-01

    Substance use and abuse begin during adolescence. Male and female adolescent humans initiate use at comparable rates, but males increase use faster. In adulthood, more men than women use and abuse addictive drugs. However, some women progress more rapidly from initiation of use to entry into treatment. In animal models, adolescent males and females consume addictive drugs similarly. However, reproductively mature females acquire self-administration faster, and in some models, escalate use more. Sex/gender differences exist in neurobiologic factors mediating both reinforcement (dopamine, opioids) and aversiveness (CRF, dynorphin), as well as intrinsic factors (personality, psychiatric co-morbidities) and extrinsic factors (history of abuse, environment especially peers and family) which influence the progression from initial use to abuse. Many of these important differences emerge during adolescence, and are moderated by sexual differentiation of the brain. Estradiol effects which enhance both dopaminergic and CRF-mediated processes contribute to the female vulnerability to substance use and abuse. Testosterone enhances impulsivity and sensation seeking in both males and females. Several protective factors in females also influence initiation and progression of substance use including hormonal changes of pregnancy as well as greater capacity for self-regulation and lower peak levels of impulsivity/sensation seeking. Same sex peers represent a risk factor more for males than females during adolescence, while romantic partners increase risk for women during this developmental epoch. In summary, biologic factors, psychiatric co-morbidities as well as personality and environment present sex/gender-specific risks as adolescents begin to initiate substance use.

  12. Family Influences on Alcohol Abuse and Other Problem Behaviors among Black and White Adolescents in a General Population Sample.

    Science.gov (United States)

    Barnes, Grace M.; And Others

    1994-01-01

    An ongoing longitudinal study of 699 adolescents and their parents, begun when the adolescents were ages 13 to 16, found that, although black families had more single-parent households and lower family incomes than white families, black adolescents had higher abstention rates and lower rates of alcohol abuse and other deviance than white…

  13. Families Helping Families: Implementing a Multifamily Therapy Group with Substance-Abusing Adolescents.

    Science.gov (United States)

    Springer, David W.; Orsbon, Sarah H.

    2002-01-01

    In treating a substance-abusing adolescent, the family is a key target of intervention. Multifamily therapy groups (MFTGs) have been used to involve families in treatment and have been found to be effective with a variety of populations. This article provides a theoretical overview of a MFTG model and describes the implementation of the model with…

  14. Factors Related to the Self-Concept of Institutionalized, White, Male, Adolescent Drug Abusers.

    Science.gov (United States)

    Reardon, Barbara; Griffing, Penelope

    1983-01-01

    Examined factors related to the self-concept of institutionalized male drug abusers (N=140). The Tennessee Self Concept Scale, a family questionnaire, and an interview were administered. Results yielded several predictors of self-concept, including parent-adolescent relationship, number of prior status offenses, and preference for nondepressant…

  15. Prevalence of substance use and abuse in late childhood and early adolescence: What are the implications?

    Directory of Open Access Journals (Sweden)

    Luigi Gallimberti

    2015-01-01

    The middle school years should be identified as the first period at risk concerning the use of these drugs. Prevention programs should begin in early adolescence, focusing on delaying the use or abuse of any of the “gateway drugs.”

  16. Early Maladaptive Schemas in a Sample of British Adolescent Sexual Abusers: Implications for Therapy

    Science.gov (United States)

    Richardson, Graeme

    2005-01-01

    This study describes the results of the administration of the Young Schema Questionnaire in a British sample of 54 sexually abusive adolescents. This questionnaire is a measurement of the 16 Early Maladaptive Schemas (EMSs) as conceptualized by Young in his schema model of psychopathology. A clinical group of 40 was differentiated from a…

  17. Psychoanalytic/Psychodynamic Psychotherapy for Sexually Abused Children and Adolescents: A Systematic Review

    Science.gov (United States)

    Parker, Ben; Turner, William

    2014-01-01

    Objective: To assess the effectiveness of psychoanalytic/psychodynamic psychotherapy for children and adolescents who have been sexually abused. Method: The Cochrane Collaboration's criteria for data synthesis and study quality assessment were used. Electronic bibliographic databases and web searches were used to identify randomized and…

  18. Markers of Marijuana Use Outcomes within Adolescent Substance Abuse Group Treatment

    Science.gov (United States)

    Engle, Brett; Macgowan, Mark J.; Wagner, Eric F.; Amrhein, Paul C.

    2010-01-01

    Objectives: Despite their popularity, little is known about what distinguishes effective from ineffective or even iatrogenic adolescent group interventions. Methods: Audio recordings and transcripts from 19, 8-10 session, school-based treatment groups comprised of 108, substance abusing 10- to 19-year olds were analyzed. "Group leader empathy" was…

  19. Effects of Group Therapy on Female Adolescent Survivors of Sexual Abuse: A Pilot Study.

    Science.gov (United States)

    Thun, Debra; Sims, Patricia L.; Adams, Mary Ann; Webb, Thomas

    2002-01-01

    Explores treatment interventions for female sexual abuse survivors through a pilot study examining the relationship between group treatment and adolescent self-image. Results revealed that participants who received group therapy increased in levels of impulse control and that the experimental group had a decrease in self-reliance whereas the…

  20. Social Network Characteristics of Urban Adolescents in Brief Substance Abuse Treatment

    Science.gov (United States)

    Mason, Michael

    2009-01-01

    In this study, the social network characteristics of 102 urban adolescents in brief substance abuse treatment are described and analyzed longitudinally to examine risk and protective mechanisms. The treatment intervention had one session devoted to social support and networks. Social networks were conceptualized and measured along two dimensions…

  1. Experience of Sexual Abuse in Childhood and Abortion in Adolescence and Early Adulthood

    Science.gov (United States)

    Boden, Joseph M.; Fergusson, David M.; Horwood, L. John

    2009-01-01

    Objective: The present study examined the associations between the experience of sexual abuse in childhood (CSA) and the number of abortions in adolescence and early adulthood. Method: A 25-year prospective longitudinal study of the health, development, and adjustment of a birth cohort of 1,265 New Zealand children (630 females). Measures included…

  2. Development of an adolescent inpatient sexual abuse group: application of Lewin's model of change.

    Science.gov (United States)

    Riddle, C R

    1994-01-01

    The development and implementation of an adolescent sexual abuse group on an inpatient psychiatric unit is described. Steps of Kurt Lewin's model of change are used as a framework for this planned change. Specific issues concerning group procedure and process are detailed. Recommendations for this group and broader use of the Lewin model are included.

  3. A multiple case study comparison of normal private preparatory school and substance abusing/mood disordered adolescents and their families.

    Science.gov (United States)

    Yeh, L S; Hedgespeth, J

    1995-01-01

    This multiple case study of ten families of normal private preparatory school adolescents and five families of substance abusing/mood disordered adolescents was an effort to identify factors that may suggest a relationship between the abuse of substances in adolescents who also have mood disorders and the following family factors: parental marital discord, degree of family satisfaction, and family problem-solving styles. The fifteen families completed four assessment instruments and participated in a videotaped problem-solving exercise. The results of this study showed that all members of the substance abusing/mood disordered adolescents' families rated themselves as dysfunctional in all major areas of family life. In contrast, the normal private preparatory school families reported satisfaction with most areas of family functioning. Communication styles also differed considerably between the two small groups of families. These results appear to support the importance of family evaluation and treatment when addressing the issue of adolescent substance abusers with mood disorders.

  4. Treating paternal drug abuse using Learning Sobriety Together: effects on adolescents versus children.

    Science.gov (United States)

    Kelley, Michelle L; Fals-Stewart, William

    2008-01-01

    The focus of this study was whether couples-based treatment for substance abuse had comparable secondary benefits on the internalizing and externalizing behaviors of adolescent versus child siblings living in their homes. Couples took part in a couples-based treatment for substance abuse that combines Behavioral Couples Therapy and individual counseling (i.e., Learning Sobriety Together). During a 17-month assessment period, the relationship between parents' functioning (i.e., fathers' drug use as determined by percent days abstinent and parents' dyadic adjustment) as rated by mothers, fathers, and children's teachers and internalizing behavior (as rated by mothers' only) was stronger for children than their adolescent siblings, particularly in terms of children's externalizing behaviors. Interventions that reduce paternal drug use and improve couple functioning may reduce internalizing and externalizing symptoms for children in their homes; however, adolescents may need more intensive interventions to address internalizing and externalizing symptoms.

  5. Post Traumatic Stress Disorder/PTSD in adolescent victims of sexual abuse: resilience and social support as protection factors

    Directory of Open Access Journals (Sweden)

    Martine Hébert

    2014-03-01

    Full Text Available This analysis examined the contribution of personal, family (maternal and paternal support; sibling support and extra-familiar (peer support; other adults resilience to the prediction of clinical levels of PTSD symptoms in adolescents reporting sexual abuse. Controls were established for abuse-related variables (type of abuse, severity and multiple abuse in a representative sample of high schools students in the province of Quebec. A total of 15.2% of adolescent females and 4.4% adolescent males in high school reported a history of sexual abuse in childhood. Sexually abused adolescent females (27.8% were more likely than adolescent males (14.9% to achieve scores with high clinical levels of PTSD. Hierarchical logistic regression revealed that over and above the characteristics of the sexual abuse experienced, resilience factors (maternal and peer support contributed to the prediction of symptoms of PTSD attaining the clinical threshold. Alternative intervention and prevention practices geared to adolescent victims of sexual assault are discussed.

  6. [Age-related characteristics of inhalant abuse in adolescents with conduct disorders].

    Science.gov (United States)

    Grechanyĭ, S V; Egorov, A Iu

    2014-01-01

    Objective. The aim of the study was to determine the relation between inhalant abuse and conduct disorders in adolescents. Material and methods. Authors studied 95 adolescents with ICD-10 diagnoses conduct disorders (F91.1, 91.2), "Mental and behavioral disorders due to use of inhalant abuse. Harmful use" (F18.1) and "Inhalant drug dependence" (F18.2). "The Nisonger Child Behavior Rating Form" ("NCBRF, TIQ version") and "Adolescent Drug Abuse Diagnosis (ADAD)" ("EvroADAD" version) were used. Two teenager groups were investigated: the younger (mean age 14.35±0.844 years) one and the older (mean age 16.30±0.464 years) ones. Clinical manifestations of inhalant intoxication and symptoms of addiction were described. Using cluster analysis, the relation of clinical manifestations of conduct disorder with symptoms of inhalant addiction and its consequences were calculated. Results and conclusion. In the younger group, no significant statistical relationships were found. In the older group, 3 cluster were detected: 1) the variables that characterized the relationship of inhalant abuse with typical behavioral patterns such as delinquency, school and social maladjustment; 2) the variables that characterized the transformation of the inhalant use to alcohol use which was associated with hyperkinetic conduct disorder; 3) the variables that characterize a pronounced health and psychological consequences of the inhalant use.

  7. Alcohol Abuse and Depression in Children and Adolescents

    Science.gov (United States)

    Wu, Ping; Hoven, Christina W.; Okezie, Ngozi; Fuller, Cordelia J.; Cohen, Patricia

    2008-01-01

    This study examines gender differences in patterns of the co-occurrence of alcohol abuse and depression in youth. Data were from 1,458 youth (ages 9-17) randomly selected from the community. The child and one parent/guardian in each household were interviewed regarding childhood psychopathology, alcohol and drug use, and a wide array of risk…

  8. The Association of Physical and Sexual Abuse with HIV Risk Behaviors in Adolescence and Young Adulthood: Implications for Public Health.

    Science.gov (United States)

    Cunningham, Renee M.; And Others

    1994-01-01

    Interviews conducted with 602 youths at public health clinics revealed that a history of physical abuse, sexual abuse, or rape was related to engaging in a variety of human immunodeficiency virus (HIV) risk behaviors and to a continuation or increase in the number of these behaviors between adolescence and young adulthood. (Author/JDD)

  9. Cultural Considerations in the Treatment of Mental Illness among Sexually Abused Children and Adolescents: The Case of Bali, Indonesia

    Science.gov (United States)

    Lesmana, Cokorda Bagus J.; Suryani, Luh Ketut; Tiliopoulos, Niko

    2015-01-01

    Childhood and adolescence sexual abuse can have long-lasting and devastating effects on personal and interpersonal growth and development. Sexually abused children tend to exhibit higher rates of poor school performance, aggressive behavior, PTSD (posttraumatic stress disorder), or depressive symptomatology, as well as social and relational…

  10. Impact of Physical and Sexual Abuse on Treatment Response in the Treatment of Resistant Depression in Adolescent Study (TORDIA)

    Science.gov (United States)

    Shamseddeen, Wael; Asarnow, Joan Rosenbaum; Clarke, Gregory; Vitiello, Benedetto; Wagner, Karen Dineen; Birmaher, Boris; Keller, Martin B.; Emslie, Graham; Iyengar, Satish; Ryan, Neal D.; McCracken, James T.; Porta, Giovanna; Mayes, Taryn; Brent, David A.

    2011-01-01

    Objective: We previously reported that a history of abuse was associated with a poorer response to combination treatment in the Treatment of Resistant Depression in Adolescents study (TORDIA). We now report on the nature and correlates of abuse that might explain these findings. Method: Youth who did not benefit from an adequate selective…

  11. [Relations between family context and substance abuse in high school adolescents].

    Science.gov (United States)

    Garcia, Jairo Jose; Pillon, Sandra Cristina; dos Santos, Manoel Antônio

    2011-06-01

    This study aimed to describe the family context characteristics of high school adolescents and their relation to psychoactive substance abuse. It is a cross-sectional and descriptive study, with a population of 657 secondary-school students in the city of Leon, Nicaragua, which corresponded to 31% of the research context. Data was collected through an anonymous questionnaire. Results show that 56% of the adolescents were living with both parents and 32% only with the mother, 86% declared a good relationship with the mother, but 24% did not show confidence in the mother figure. Regarding psychoactive substance use within the family context, 52% of the adolescents' family presented previous use events and, in 42% of cases, the father was the user. Results offer important contributions to design public healthcare policies and to outline prevention strategies for use among adolescents.

  12. Consulting for substance abuse: mental disorders among adolescents and their parents.

    Science.gov (United States)

    Hodgins, S; Tengström, A; Bylin, S; Göranson, M; Hagen, L; Janson, M; Larsson, A; Lundgren-Andersson, C; Lundmark, C; Norell, E; Pedersen, H

    2007-01-01

    Studies conducted outside of Scandinavia indicate that most adolescents with substance misuse problems suffer from co-morbid mental disorders. The present study assessed the mental health of adolescents seeking help for substance misuse problems in a large Swedish city. Parents' mental health was also examined. The sample included 97 girls with their 90 mothers and 52 fathers, and 81 boys with their 72 mothers and 37 fathers. The adolescents completed a diagnostic interview, either the Kiddie-SADs or the Structured Clinical Interview for DSM-IV (SCID) depending on their age. Their parents underwent diagnostic interviews with the SCID. Ninety per cent of the girls and 81% of the boys met criteria for at least one disorder other than substance misuse, and on average, they suffered from three other disorders, most of which had onset before substance misuse began. Almost 80% of the mothers and 67% of the fathers met criteria for at least one mental disorder other than alcohol and drug-related disorders. The findings concur with those reported from studies conducted in North America. The results suggest that in Sweden mental disorders are not being identified and effectively treated among some children and young adolescents who subsequently abuse alcohol and/or illicit drugs. Adolescents who consult for substance abuse problems require assessments and treatment by mental health professionals.

  13. Antisocial Psychopathy and HIV Risk among Alcohol and Other Drug (AOD Abusing Adolescent Offenders

    Directory of Open Access Journals (Sweden)

    Robert M. Malow

    2007-01-01

    Full Text Available While the consensus is that HIV prevalence has remained low among adolescent offenders, the prevalence of STDs and HIV transmission risk behaviors is alarming, particularly for those abusing alcohol and other drugs and those displaying antisocial or conduct disorder characteristics. In the current study, 269 male and 110 female inner city, culturally diverse alcohol and other drug (AOD abusing adolescent offenders completed measures of (a psychopathy, using the Millon Adolescent Clinical Inventory (MACI (b HIV transmission risk behavior, (c prevention skills and attitudes and (d social desirability. Results showed that those with high levels of psychopathy reported more AOD use, overall unprotected sex and more sexual activity when influenced by alcohol and/or marijuana. High psychopathy adolescent offenders also reported lower self-efficacy and sexual response-efficacy, less favorable safer sex and condom attitudes and less favorable intentions to engage in safer sex behaviors, when controlling for social desirability. Data suggest that adolescent offenders, who are either in court-ordered treatment or detention, should be assessed for psychopathy and provided with tailored risk reduction interventions, geared toward attitudinal and behavioral change. A discussion of integrating neurobiological measures to improve the next generation of tailored interventions for this risk group is offered in conclusion.

  14. Adolescent substance-use assessment: methodological issues in the use of the Adolescent Drug Abuse Diagnosis (ADAD).

    Science.gov (United States)

    Chinet, Léonie; Plancherel, Bernard; Bolognini, Monique; Holzer, Laurent; Halfon, Olivier

    2007-01-01

    During the past twenty years, various instruments have been developed for the assessment of substance use in adolescents, mainly in the United States. However, few of them have been adapted to, and validated in, French-speaking populations. Consequently, although increasing alcohol and drug use among teenagers has become a major concern, the various health and social programs developed in response to this specific problem have received little attention with regard to follow-up and outcome assessment. A standardized multidimensional assessment instrument adapted for adolescents is needed to assess the individual needs of adolescents and assign them to the most appropriate treatment setting, to provide a single measurement within and across health and social systems, and to conduct treatment outcome evaluations. Moreover, having an available instrument makes it possible to develop longitudinal and transcultural research studies. For this reason, a French version of the Adolescent Drug Abuse Diagnosis (ADAD) was developed and validated at the University Child and Adolescent Psychiatric Clinic in Lausanne, Switzerland. This article aims to discuss the methodological issues that we faced when using the ADAD instrument in a 4-year longitudinal study including adolescent substance users. Methodological aspects relating to the content and format of the instrument, the assessment administration and the statistical analyses are discussed.

  15. Impact of Childhood Abuse on the Risk of Non-Suicidal Self-Injury in Mainland Chinese Adolescents.

    Directory of Open Access Journals (Sweden)

    Yuhui Wan

    Full Text Available Childhood abuse has been associated with significant increases in non-suicidal self-injury (NSSI behaviors in adolescents; however, only general definitions of this risk indicator have been examined. This study identified relationships between specific forms of childhood abuse and NSSI in mainland Chinese adolescents.A total of 14,221 cases were retained from an epidemiological study involving adolescents from junior and senior middle schools. Information relating to the perpetrator, perceived harm, timing of exposure to different types of childhood abuse, and NSSI were obtained. Logistic regression was used to analyze relationships between each form of childhood abuse and NSSI.Approximately 51.0% of the students reported at least one abusive childhood experience. Nearly one in four students (24.9% reported that they had engaged in NSSI in the past 12 months. Each type of childhood abuse, occurring at any time within the first 16 years of life, especially in situations of continuous exposure, was significantly associated with NSSI. A significant graded relationship was found between number of abusive childhood experiences and NSSI. Students maltreated by parents or others were at high risk of engaging in NSSI, the risk was greater in students maltreated by both; students who had been exposed to childhood abuse with no perceived harm still demonstrated an elevated risk for NSSI. The pattern of associations did not vary by gender.These findings suggest that experiencing any of various forms of childhood abuse should be considered a risk factor for NSSI during adolescence. Further research should focus upon psychosocial, neural, and genetic factors that might moderate or mediate the onset of NSSI in adolescents who have experienced childhood abuse.

  16. Post-traumatic Stress Disorder After Sexual Abuse in Adolescent Girls.

    Science.gov (United States)

    Ashby, Bethany D; Kaul, Paritosh

    2016-12-01

    The sexual assault of girls and women in this country is estimated at approximately 20%. The development of post-traumatic stress disorder (PTSD) after sexual abuse and assault is one of the potential lingering aftereffects. In this article we describe PTSD after sexual abuse and its effect on presenting complaints, such as sexually transmitted infections, contraception, and chronic pain, for the pediatric and adolescent gynecology (PAG) clinician. Treatment approaches, including the use of antidepressants and anxiolytics, as well as evidenced-based psychotherapies, are highlighted. In addition, this article will assist the PAG clinician in identifying trauma-related concerns during clinic visits and will cover specific screening tools to aid in identification of PTSD. A better understanding of PTSD after sexual abuse will allow PAG providers to deliver better care to their patients.

  17. Impact of Substance Abuse on Academic Performance among Adolescent Students of Colleges of Education in Kwara State, Nigeria

    Science.gov (United States)

    Akanbi, Muritala Ishola; Augustina, Godwin; Theophilus, Anyio Bahago; Muritala, Muhammad; Ajiboye, Ajiboye Stephen

    2015-01-01

    The study investigated the impact of substance abuse on adolescent on academic performance in colleges of education in Kwara State. The design used for the study was the survey. A sample of 150 adolescent students was randomly selected form selected departments in three colleges of education in the State. A validated instrument, Drug Habit…

  18. The Effect of Alcohol Abuse and Dependence and School Experiences on Depression: A National Study of Adolescents

    Science.gov (United States)

    Merianos, Ashley L.; King, Keith A.; Vidourek, Rebecca A.; Hardee, Angelica M.

    2016-01-01

    The study purpose was to examine the effect alcohol abuse/dependence and school experiences have on depression among a nationwide sample of adolescents. A secondary analysis of the 2013 National Survey on Drug Use and Health was conducted. The results of the final multivariable logistic regression model revealed that adolescents who reported…

  19. Abuse

    Science.gov (United States)

    ... basic needs like food, shelter, and love. Family violence can affect anyone. It can happen in any kind of family. Sometimes parents abuse each other, which can be hard for a child to witness. Some parents abuse their kids by using physical or verbal cruelty as a way of discipline. ...

  20. Alcohol drinking by parents and risk of alcohol abuse by adolescents

    Directory of Open Access Journals (Sweden)

    Antipkin, Yuri

    2012-07-01

    Full Text Available OBJECTIVE(S: To investigate associations between alcohol drinking by parents at different time of their life and alcohol use by adolescents.DESIGN: The longitudinal epidemiological study design was used to answer the proposed research questions. This study is based on the data of the Family and Children of Ukraine Study (FCOU, which is a prospective cohort study of women and children. PARTICIPANTS: Recruited subjects were pregnant women with last menstrual period (LMP between 25 December 1992 and 23 July 1994. Self-completed questionnaires and the medical record data were collected at the first antenatal clinic visit and at the delivery. The sample in the city of Dniprodzerzhynsk consists of 2148 women, their children and partners (if any, but at 15-17-years-old follow-up only data about 1020 participants were available. MAIN EXPOSURES: Use of alcohol by mother/father before pregnancy, during pregnancy, and at 15-17 years of child’s age.OUTCOME MEASURE: Use of alcohol by 15-17-year-old adolescent.RESULTS: Use of alcohol more than once a week by mother before pregnancy was associated with alcohol abuse by adolescents, unlike father’s use of alcohol before and during pregnancy. Use of alcohol both by mother and father during adolescence of their offspring was strongly associated with alcohol abuse by the child. In the multivariate analysis only alcohol use by mother during adolescence of the child was significantly associated with alcohol use by the adolescent.CONCLUSIONS: This study supports the hypothesis that concurrent social factors influence regular alcohol use among adolescents more intensively than early life factors.

  1. Abuse and neglect in adolescents of Jammu, India: the role of gender, family structure, and parental education.

    Science.gov (United States)

    Charak, Ruby; Koot, Hans M

    2014-08-01

    The present study aimed to assess the factor structure of the childhood trauma questionnaire (CTQ; Bernstein & Fink, 1998), and use it to describe the prevalence of abuse and neglect in Indian adolescents, and its associations with gender, family structure (nuclear vs. joint), and level of parental education. Participants were 702 adolescents from Jammu in the age range of 13-17 years (41.5% female). We found acceptance for a four-factor intercorrelated model for the CTQ with emotional abuse, physical abuse, sexual abuse, and neglect (5 emotional neglect and 2 physical neglect items) factors following a confirmatory factor analysis (CFA). Forty-one to sixty-one percent of adolescents reported maltreatment which is higher in comparison with CTQ based studies from the West. Analysis of CFA with covariates (MIMIC model) indicated that males, and adolescents of less educated mothers' and from joint families reported higher abuse and neglect, and sexual abuse, respectively, while fathers' education level was not associated with abuse or neglect. Implications of these findings are highlighted.

  2. Inter-personal violence and abuse in adolescent intimate relationships: mental health impact and implications for practice.

    Science.gov (United States)

    Barter, Christine; Stanley, Nicky

    2016-10-01

    This paper provides a narrative review of the knowledge on inter-personal violence and abuse (IPVA) in adolescents' intimate relationships. It draws on the authors' own research, published reviews, and a rapid review on IPVA victimization and mental health outcomes for adolescents. The research reviewed identified associations between adolescent IPVA and substance misuse, depressive symptoms and PTSD, eating disorders and suicidal thinking, and behaviour in young people. Generally, girls appeared more likely to report severe mental health outcomes than boys. Adolescents rarely disclose IPVA to adults and delivering preventative programmes that promote knowledge and help seeking may offer a means of building on young people's tendency to seek help from friends. These preventative interventions, usually delivered in schools, need to be closely linked to support services for adolescents who disclose abuse. While there are some practice examples of emerging interventions for both victims and perpetrators of adolescent IPVA, there is as yet little robust evidence regarding their effectiveness.

  3. Parent Structure and Support and Adolescent Problems: Delinquency, Substance Abuse, and Peer and Self-Esteem Deficits

    OpenAIRE

    Parker, Jennifer S.

    2000-01-01

    ab ABSTRACT Attachment and family systems theories provided a framework for examining parental structure and support and adolescent delinquency, substance abuse, peer relations, and self-esteem. Three parent scales: support, watchfulness and decidedness, and eight adolescent outcome variables assessing self-esteem, peer relations, and risk-behaviors were derived from the National Educational Longitudinal Study. The sample of 16,749 adolescents was diverse re...

  4. Iudicium: An Educational Intervention for addressing Risk Perception of Alcohol Abuse in Adolescents.

    Science.gov (United States)

    Bajac, Héctor; Feliu-Soler, Albert; Meerhoff, Diana; Latorre, Laura; Elices, Matilde

    2016-03-02

    Negative consequences of alcohol abuse during adolescence have been extensively described. Consequently, different interventions have been developed to address this issue. This article describes the implementation and evaluation of Iudicium, an educational drama-based intervention designed to increase risk perception of alcohol abuse. In this activity, high school students judge a case in which alcohol consumption had negative consequences (e.g., fights, unwanted pregnancy, and car accident). A trial is simulated and after that, a debriefing takes place during which the activity is discussed and informational materials on the effects of alcohol is provided and commented. A total of 318 students (55.7% females and 44.3% males) from five high schools participated in the study. Data regarding risk perception of alcohol abuse and adequacy of the activity was collected before and after the intervention. Results suggest that Iudicium was effective in increasing risk perception of abusive drinking, reaching a 34% of increase regarding risk perception. Participants highlighted the experiential component of Iudicium as a strength. The intervention was well-accepted, easy to understand and apparently an effective tool for increasing risk perception of alcohol abuse amongst high school students.

  5. An animal model of social instability stress in adolescence and risk for drugs of abuse.

    Science.gov (United States)

    McCormick, Cheryl M

    2010-02-09

    There is increasing evidence that adolescence, like early life, is a sensitive period in which ongoing brain development can be influenced by environmental factors. This review describes our use of social instability as a model of mild adolescent social stress, its effects on social interactions and on hypothalamic-pituitary-adrenal function over the course of the procedure and in response to new stressors. The effects of social instability are sex-specific, with qualitative differences between the sexes on HPA function over the course of the stressor procedure, and with greater effects in males on behaviour observed during the social instability and greater effects in females on behavioural responses to drugs of abuse into adulthood, long after the stress exposure. The results from investigations with this model of adolescent social stress are discussed in relation to those of studies using other stressor procedures. Elevated exposure to glucocorticoids over the course of adolescence confers sex-specific changes in behavioural responses to drugs of abuse, which may be of relevance for understanding risk factors in people.

  6. Money Lending Practices and Adolescent Dating Relationship Abuse: Results from a National Sample.

    Science.gov (United States)

    Copp, Jennifer E; Mumford, Elizabeth A; Taylor, Bruce G

    2016-09-01

    Research on adult intimate partner violence has demonstrated that economic considerations and financial decision-making are associated with the use of violence in marital and cohabiting relationships. Yet limited work has examined whether financial behaviors influence the use of violence in adolescent dating relationships. We use data from the National Survey on Teen Relationships and Intimate Violence (STRiV) (n = 728), a comprehensive national household survey dedicated specifically to the topic of adolescent relationship abuse, to examine associations between requests for money lending, economic control/influence, financial socialization and adolescent relationship abuse among a large, diverse sample of male and female adolescents [48 % female; 30 % non-White, including Black (10 %), Hispanic (2 %), and other (18 %)]. Findings suggest that requests for money lending are associated with heightened risk of moderate and serious threats/physical violence perpetration and victimization, net of traditional predictors. We discuss the implications of our findings for intervention and prevention efforts.

  7. Parent-Adolescent Relations and Adolescent Functioning: Self-Esteem, Substance Abuse, and Delinquency

    Science.gov (United States)

    Parker, Jennifer S.; Benson, Mark J.

    2004-01-01

    The present study examined parental support and monitoring as they relate to adolescent outcomes. It was hypothesized that support and monitoring would be associated with higher self-esteem and less risky behavior during adolescence. The diverse sample included 16,749 adolescents assessed as part of the National Educational Longitudinal Study.…

  8. Abuse

    Science.gov (United States)

    ... indicate neglect. Belittling, threats or other uses of power by spouses, family members or others may indicate verbal or emotional abuse. Strained or tense relationships and frequent arguments between ...

  9. Testing for drugs of abuse in children and adolescents.

    Science.gov (United States)

    Levy, Sharon; Siqueira, Lorena M; Ammerman, Seth D; Gonzalez, Pamela K; Ryan, Sheryl A; Siqueira, Lorena M; Smith, Vincent C

    2014-06-01

    Drug testing is often used as part of an assessment for substance use in children and adolescents. However, the indications for drug testing and guidance on how to use this procedure effectively are not clear. The complexity and invasiveness of the procedure and limitations to the information derived from drug testing all affect its utility. The objective of this clinical report is to provide guidance to pediatricians and other clinicians on the efficacy and efficient use of drug testing on the basis of a review of the nascent scientific literature, policy guidelines, and published clinical recommendations.

  10. Admission to acute care hospitals for adolescent substance abuse: a national descriptive analysis

    Directory of Open Access Journals (Sweden)

    Chisolm Deena J

    2006-07-01

    Full Text Available Abstract Background Use of alcohol and illicit drugs by adolescents remains a problem in the U.S. Case identification and early treatment can occur within a broad variety of healthcare and non-healthcare settings, including acute care hospitals. The objective of this study is to describe the extent and nature of adolescent admissions to the acute inpatient setting for substance abuse (SA. We use the Agency for Healthcare Research and Quality (AHRQ 2000 Healthcare Cost and Utilization Project Kids Inpatient Database (HCUP-KID which includes over 2.5 million admissions for youth age 20 and under to 2,784 hospitals in 27 states in the year 2000. Specifically, this analysis estimates national number of admissions, mean total charges, and mean lengths of stay for adolescents between the ages of 12 and 17 admitted to an acute care hospital for the following diagnostic categories from the AHRQ's Clinical Classifications Software categories: "alcohol-related mental disorders" and "substance-related mental disorders". Frequency and percentage of total admissions were calculated for demographic variables of age, gender and income and for hospital characteristic variables of urban/rural designation and children's hospital designation. Results SA admissions represented 1.25 percent of adolescent admissions to acute care hospitals. Nearly 90 percent of the admission occurred in non-Children's hospitals. Most were for drug dependence (38% or non-dependent use of alcohol or drugs (35%. Costs were highest for drug dependence admissions. Nearly half of admissions had comorbid mental health diagnoses. Higher rates of admission were seen in boys, in older adolescents, and in "self-pay" patients. Alcohol and drug rehabilitation/detoxification, alone or in combination with psychological and psychiatric evaluation and therapy, was documented for 38 percent of admissions. Over 50 percent of cases had no documentation of treatment specific to substance use behavior

  11. Differential Influences of Parenting Dimensions and Parental Physical Abuse during Childhood on Overweight and Obesity in Adolescents

    Directory of Open Access Journals (Sweden)

    Thomas Mößle

    2017-03-01

    Full Text Available Besides other explanatory variables, parenting styles and parental violence might also be responsible for setting a path towards overweight/obesity in childhood. While this association has consistently been observed for adults, findings for adolescents still remain scarce and inconsistent. Therefore, the goal of this study is to add evidence on this topic for children and adolescents. Analyses are based on a sample of 1729 German, ninth-grade students. To analyze associations between parenting dimensions and weight status, non-parametric conditional inference trees were applied. Three gender-specific pathways for a heightened risk of overweight/obesity were observed: (1 female adolescents who report having experienced severe parental physical abuse and medium/high parental warmth in childhood; (2 male adolescents who report having experienced low or medium parental monitoring in childhood; and (3 this second pathway for male adolescents is more pronounced if the families receive welfare. The importance of promoting parenting styles characterized by warmth and a lack of physical abuse is also discussed. This is one of only a few studies examining the association of parenting dimensions/parental physical abuse and weight status in adolescence. Future studies should include even more parenting dimensions, as well as parental physical abuse levels, in order to detect and untangle gender-specific effects on weight status.

  12. Differential Influences of Parenting Dimensions and Parental Physical Abuse during Childhood on Overweight and Obesity in Adolescents.

    Science.gov (United States)

    Mößle, Thomas; Kliem, Sören; Lohmann, Anna; Bergmann, Marie Christine; Baier, Dirk

    2017-03-07

    Besides other explanatory variables, parenting styles and parental violence might also be responsible for setting a path towards overweight/obesity in childhood. While this association has consistently been observed for adults, findings for adolescents still remain scarce and inconsistent. Therefore, the goal of this study is to add evidence on this topic for children and adolescents. Analyses are based on a sample of 1729 German, ninth-grade students. To analyze associations between parenting dimensions and weight status, non-parametric conditional inference trees were applied. Three gender-specific pathways for a heightened risk of overweight/obesity were observed: (1) female adolescents who report having experienced severe parental physical abuse and medium/high parental warmth in childhood; (2) male adolescents who report having experienced low or medium parental monitoring in childhood; and (3) this second pathway for male adolescents is more pronounced if the families receive welfare. The importance of promoting parenting styles characterized by warmth and a lack of physical abuse is also discussed. This is one of only a few studies examining the association of parenting dimensions/parental physical abuse and weight status in adolescence. Future studies should include even more parenting dimensions, as well as parental physical abuse levels, in order to detect and untangle gender-specific effects on weight status.

  13. Adolescent Friend Similarity on Alcohol Abuse as a Function of Participation in Romantic Relationships: Sometimes a New Love Comes between Old Friends

    Science.gov (United States)

    DeLay, Dawn; Laursen, Brett; Bukowski, William M.; Kerr, Margaret; Stattin, Håkan

    2016-01-01

    This study tests the hypothesis that adolescents with romantic partners are less similar to their friends on rates of alcohol abuse than adolescents without romantic partners. Participants (662 girls, 574 boys) ranging in age from 12 to 19 years nominated friends and romantic partners, and completed a measure of alcohol abuse. In hierarchical…

  14. Coping style and memory specificity in adolescents and adults with histories of child sexual abuse.

    Science.gov (United States)

    Harris, Latonya S; Block, Stephanie D; Ogle, Christin M; Goodman, Gail S; Augusti, Else-Marie; Larson, Rakel P; Culver, Michelle A; Pineda, Annarheen R; Timmer, Susan G; Urquiza, Anthony

    2016-09-01

    Individuals with histories of childhood trauma may adopt a nonspecific memory retrieval strategy to avoid unpleasant and intrusive memories. In a sample of 93 adolescents and adults with or without histories of child sexual abuse (CSA), we tested the hypothesis that nonspecific memory retrieval is related to an individual's general tendency to use avoidant (i.e., distancing) coping as a personal problem-solving or coping strategy, especially in victims of CSA. We also examined age differences and other individual differences (e.g., trauma-related psychopathology) as predictors of nonspecific memories. Distancing coping was significantly associated with less specific autobiographical memory. Younger age, lower vocabulary scores, and non-CSA childhood maltreatment (i.e., physical and emotional abuse) also uniquely predicted less autobiographical memory specificity, whereas trauma-related psychopathology was associated with more specific memory. Implications for the development of autobiographical memory retrieval in the context of coping with childhood maltreatment are discussed.

  15. Relativistic Runaway Electrons

    Science.gov (United States)

    Breizman, Boris

    2014-10-01

    This talk covers recent developments in the theory of runaway electrons in a tokamak with an emphasis on highly relativistic electrons produced via the avalanche mechanism. The rapidly growing population of runaway electrons can quickly replace a large part of the initial current carried by the bulk plasma electrons. The magnetic energy associated with this current is typically much greater than the particle kinetic energy. The current of a highly relativistic runaway beam is insensitive to the particle energy, which separates the description of the runaway current evolution from the description of the runaway energy spectrum. A strongly anisotropic distribution of fast electrons is generally prone to high-frequency kinetic instabilities that may cause beneficial enhancement of runaway energy losses. The relevant instabilities are in the frequency range of whistler waves and electron plasma waves. The instability thresholds reported in earlier work have been revised considerably to reflect strong dependence of collisional damping on the wave frequency and the role of plasma non-uniformity, including radial trapping of the excited waves in the plasma. The talk also includes a discussion of enhanced scattering of the runaways as well as the combined effect of enhanced scattering and synchrotron radiation. A noteworthy feature of the avalanche-produced runaway current is a self-sustained regime of marginal criticality: the inductive electric field has to be close to its critical value (representing avalanche threshold) at every location where the runaway current density is finite, and the current density should vanish at any point where the electric field drops below its critical value. This nonlinear Ohm's law enables complete description of the evolving current profile. Work supported by the U.S. Department of Energy Contract No. DEFG02-04ER54742 and by ITER contract ITER-CT-12-4300000273. The views and opinions expressed herein do not necessarily reflect those of

  16. Longitudinal Study on the Effects of Child Abuse and Children’s Exposure to Domestic Violence, Parent-Child Attachments, and Antisocial Behavior in Adolescence

    OpenAIRE

    Sousa, Cindy; Herrenkohl, Todd I.; Moylan, Carrie A.; Tajima, Emiko A.; Klika, J. Bart; Herrenkohl, Roy C.; Russo, M. Jean

    2010-01-01

    This study examined the unique and combined effects of child abuse and children’s exposure to domestic violence on later attachment to parents and antisocial behavior during adolescence. Analyses also investigated whether the interaction of exposure and low attachment predicted youth outcomes. Findings suggest that, while youth dually exposed to abuse and domestic violence were less attached to parents in adolescence than those who were not exposed, those who were abused only, and those who w...

  17. Prevention of adolescent substance abuse through the development of personal and social competence.

    Science.gov (United States)

    Botvin, G J

    1983-01-01

    The initiation of substance use typically begins during adolescence and appears to be the result of the complex interplay of social, personality, cognitive, attitudinal, behavioral, and developmental factors. Traditional smoking, alcohol, and drug education programs have attempted to increase students' knowledge of the risks associated with using these substances in the hope that this would deter use. Other programs have attempted to enrich the personal and social development of students through what has been referred to as "affective" education. Unfortunately, the inescapable conclusion to be drawn from the substance abuse prevention literature is that few of these programs have demonstrated any degree of success in terms of the actual prevention of substance use/abuse. Traditional educational approaches to substance abuse prevention appear to be inadequate because they are based on faulty assumptions and are too narrow in their focus. The "affective" education approaches, on the other hand, appear to have placed too little emphasis on the acquisition of the kind of skills that are likely to increase general personal competence and enable students to cope with the various interpersonal and intrapersonal pressures to begin using tobacco, alcohol, or drugs. From the perspective of social learning theory (Bandura 1977) and problem behavior theory (Jessor and Jessor 1977), substance use is conceptualized as a socially learned, purposive, and functional behavior which is the result of the interplay of social (environmental) and personal factors. One potentially effective approach to substance abuse prevention might involve enhancing general personal competence and teaching adolescents the kind of problem-specific skills and knowledge which will increase their ability to resist the various forms of pro-substance-use social pressure. Brief reviews of the social skills training literature and the literature related to techniques for coping with anxiety not only provide

  18. Substance abuse In Middle Eastern adolescents living in two different countries: spiritual, cultural, family and personal factors.

    Science.gov (United States)

    Badr, Lina Kurdahi; Taha, Asma; Dee, Vivien

    2014-08-01

    It is estimated that the percentage of students using illicit substances by sixth grade has tripled over the last decade not only in developed countries but in developing countries as well probably due to the transition to a more Western society. Although much has been done to understand the mechanisms underlying substance abuse, few studies have been conducted with minority ethnic and religious groups such as Middle Eastern Youth. The primary goal of this study was to determine whether there are differences in factors contributing to substance abuse in adolescents from Lebanon versus the U.S.A. and to decipher the role of spirituality, religion, and culture among other factors that may influence substance abuse. A correlational cross-sectional design was used with adolescents living in two different countries: Los Angeles, California and Beirut, Lebanon. Muslim adolescents had significantly less rates of alcohol and substance use than Christians in both Lebanon and Los Angeles. More years lived in the U.S.A. increases the likelihood of abuse for both Muslims and Christians. Attachment to God and family was negatively associated with substance abuse. These results among others facilitate a better understanding of the influence of culture, religion, family and personal factors on substance abuse. Culturally sensitive interventions could benefit from the findings of this pilot study.

  19. The Adolescent Substance Abuse Goal Commitment (ASAGC) Questionnaire: An Examination of Clinical Utility and Psychometric Properties.

    Science.gov (United States)

    Kaminer, Yifrah; Ohannessian, Christine McCauley; McKay, James R; Burke, Rebecca H

    2016-02-01

    Commitment to change is an innovative potential mediator or mechanism of behavior change that has not been examined in adolescents with substance use disorders (SUD). The Adolescent Substance Abuse Goal Commitment (ASAGC) questionnaire is a 16-item measure developed to assess an individual's commitment to his/her stated treatment goal. The objectives of this study are to explore the research and clinical utility of the commitment construct as measured by the ASAGC. During sessions 3 and 9 of a 10-week SUD treatment, therapists completed the ASAGC for 170 13-18 year-old adolescents. An exploratory factor analysis was conducted on the ATAGC items. Concurrent validity with related constructs, self-efficacy and motivation for change, was examined as well. At both sessions, the factor analysis resulted in two scales--Commitment to Recovery and Commitment to Harm Reduction. The ASAGC scales were found to demonstrate a high level of internal consistency (alpha coefficients ranged from .92 to .96 over time). In contrast to the Commitment to Harm Reduction scale, the Commitment to Recovery scale consistently correlated with scales from the Situational Confidence Questionnaire assessing self-efficacy, evidencing concurrent validity. Similarly, the Commitment to Recovery scale was related to the Problem Recognition Questionnaire, providing further evidence of the validity of the ASAGC. The ASAGC is a reliable and valid clinical research instrument for the assessment of adolescents' commitment to their substance abuse treatment goal. Clinical researchers may take advantage of the clinical utility of the ASAGC including its ability to differentiate between commitment to abstinence versus commitment to harm reduction.

  20. Exploring the Role of Self-Esteem and Parenting Patterns on Alcohol Use and Abuse Among Adolescents

    OpenAIRE

    Glozah, Franklin N.

    2014-01-01

    The type of parental child-rearing practices used by parents and guardians substantially influence children’s self-esteem and consequently their decision to engage in alcohol use, its abuse. The aim of this study was to explore the role of self-esteem and parenting patterns on alcohol use and abuse among adolescents. Three hundred and sixteen boys and girls in Senior High Schools completed self-report questionnaires assessing self-esteem, parenting patterns and alcohol use and abuse. The resu...

  1. Exploring the role of self-esteem and parenting patterns on alcohol use and abuse among adolescents

    OpenAIRE

    Glozah, Franklin N.

    2014-01-01

    The type of parental child-rearing practices used by parents and guardians substantially influence children’s self-esteem and consequently their decision to engage in alcohol use, its abuse. The aim of this study was to explore the role of self-esteem and parenting patterns on alcohol use and abuse among adolescents. Three hundred and sixteen boys and girls in Senior High Schools completed self-report questionnaires assessing self-esteem, parenting patterns and alcohol use and abuse. The resu...

  2. Validity and reliability of the Turkish version of CRAFFT Substance Abuse Screening Test among adolescents

    Directory of Open Access Journals (Sweden)

    Kandemir H

    2015-06-01

    Full Text Available Hasan Kandemir,1 Ömer Aydemir,2 Suat Ekinci,3 Salih Selek,4 Sultan B Kandemir,5 Hüseyin Bayazit61Department of Child and Adolescent Psychiatry, School of Medicine, Harran University, Sanliurfa, 2Department of Psychiatry, School of Medicine, Celal Bayar University, Manisa, 3Balikli Rum Hospital, Istanbul, 4Department of Psychiatry and Behavioral Sciences, University of Texas Health Science Center, Houston, Texas, USA; 5Department of Psychiatry, Balikligol State Hospital, Sanliurfa, 6Department of Psychiatry, School of Medicine, Harran University, Sanliurfa, TurkeyAim: This study aimed to validate the CRAFFT diagnostic test, against the Diagnostic and Statistical Manual of Mental Disorders – Fourth Edition, Axis 1-based diagnostic inventory in a Turkish population of adolescents.Method: The 124 adolescents who were 15–18 years old were enrolled to this study. CRAFFT was self-administered. Interviews took approximately 30 minutes, including the DSM-IV diagnostic interview for alcohol/drug dependence.Results: The mean age of subjects was 16.653 years (minimum: 15 years, maximum: 18 years. A score of 2 or higher in part B was found to be optimal for detecting youths with substance dependence problems (sensitivity: 0.82; specificity: 0.88 and it was sufficiently discriminative.Conclusion: The CRAFFT is a valid and reliable instrument for identifying Turkish-speaking youths at risk for substance use disorders.Keywords: CRAFFT, substance abuse, validity, Turkish, adolescent

  3. Factors associated with reporting of abuse against children and adolescents by nurses within Primary Health Care

    Directory of Open Access Journals (Sweden)

    Ana Carine Arruda Rolim

    2014-12-01

    Full Text Available OBJECTIVE: to analyze the factors associated with the underreporting on the part of nurses within Primary Health Care of abuse against children and adolescents.METHOD: cross-sectional study with 616 nurses. A questionnaire addressed socio-demographic data, profession, instrumentation and knowledge on the topic, identification and reporting of abuse cases. Bivariate and multivariate logistic regression was used.RESULTS: female nurses, aged between 21 and 32 years old, not married, with five or more years since graduation, with graduate studies, and working for five or more years in PHC predominated. The final regression model showed that factors such as working for five or more years, having a reporting form within the PHC unit, and believing that reporting within Primary Health Care is an advantage, facilitate reporting.CONCLUSION: the study's results may, in addition to sensitizing nurses, support management professionals in establishing strategies intended to produce compliance with reporting as a legal device that ensures the rights of children and adolescents.

  4. Habilidades sociais e abuso de drogas em adolescentes Social skills and drug abuse in adolescents

    Directory of Open Access Journals (Sweden)

    Marcia Fortes Wagner

    2007-12-01

    Full Text Available O presente estudo propõe uma revisão bibliográfica sobre habilidades sociais e abuso de substâncias. Este artigo foi elaborado a partir de pesquisa nas Bases de Dados Pschynfo, Web of Science, Cochrane Library, Proquest, Medline e Lilacs, entre 1996 e 2006. Os descritores foram: social skills, social skills training, social competence, assertiveness, adolescents, teeenagers, substance abuse, drug abuse, cannabis e marijuana. Nas bases de língua portuguesa, foram: habilidades sociais, treinamento em habilidades sociais, assertividade, adolescentes, abuso de substâncias, drogas e maconha. Os estudos, a maioria de língua inglesa, apontaram a existência de déficits, principalmente a dificuldade em resistir às drogas e dizer não. Conclui-se que a construção de habilidades de resistência ao oferecimento de drogas, a auto-eficácia e o estímulo à capacidade de tomada de decisões pode reduzir o uso de substâncias. Poucos estudos brasileiros foram encontrados abordando esta temática.The present article proposes a bibliographic revision on social skills and drug abuse. This article was elaborated from a research in the following Databases: Pschynfo, Web of Science, Cochrane Library, Proquest, Medline and Lilacs, between 1996 and 2006. The used describers were: social skills, social skills training, social competence, assertiveness, adolescents, teenagers, substance abuse, drug abuse, cannabis and marijuana. In the databases in Portuguese language we used the terms habilidades sociais, treinamento em habilidades sociais, assertividade, adolescentes, abuso de substâncias, drogas and maconha. The studies, the majority of which were in English, pointed the existence of deficits, mainly the difficulty in resisting to drugs and in saying no. It can be concluded that the construction of resistance skills to the offering of drugs, self-efficacy training and the stimulation of decision making capabilities can reduce substance use. Few Brazilian

  5. Alcohol use and abuse in young adulthood : Do self-control and parents' perceptions of friends during adolescence modify peer influence? The TRAILS study

    NARCIS (Netherlands)

    Visser, Leenke; de Winter, Andrea; Veenstra, René; Verhulst, F.C.; Reijneveld, Menno

    2013-01-01

    Aims: To assess the influence of peer alcohol use during adolescence on young adults' alcohol use and abuse, and to assess to what extent parents' perception of their adolescent child's friends and adolescent's self-control modify this influence. Methods: We analyzed data from the first, third, and

  6. Child sexual abuse as reported by Israeli adolescents: social and health related correlates.

    Science.gov (United States)

    Mansbach-Kleinfeld, Ivonne; Ifrah, Anneke; Apter, Alan; Farbstein, Ilana

    2015-02-01

    The objectives of the study were to assess the prevalence of child sexual abuse (CSA) in a nation-wide representative sample of 14-17 year old Israeli adolescents, and to examine the associations between CSA, socio-demographic correlates and various measures of physical and mental health. The study population consisted of 906 mother-adolescent dyads, belonging to a community based, representative sample of Israeli 14-17 year olds, interviewed in 2004-5. Response rate was 68%. Subjects provided demographic data, and information about CSA, physical symptoms, body image, well-being and use of mental health services. DAWBA was used to obtain information regarding mental disorders and suicidality. SDQ was used to obtain data on bullying. Statistical analyses were conducted using an SPSS-17 complex sample analysis module and multivariate analyses were conducted to assess the associations between CSA and risk factors and social and health related correlates. Findings show that CSA was reported by 3.3% of adolescents. Higher risk of exposure to CSA was found among girls, among adolescents living in a one-parent household and among adolescents with a chronic disability. In multivariate models adjusting for gender, learning disabilities and depression, CSA was associated with suicidal attempts, stomach ache, dizziness, sleep problems, well being at home and bullying behaviors. No association was found with suicidal ideation or other physical symptoms. Our findings confirm that the associations between CSA and different outcomes vary depending on the socio-psychological context, and underline the importance of addressing the complexity of variables associated with CSA.

  7. Substance Use and Abuse Trajectories across Adolescence: A Latent Trajectory Analysis of a Community-Recruited Sample of Girls

    Science.gov (United States)

    Marti, C. Nathan; Stice, Eric; Springer, David W.

    2010-01-01

    We used data from a school-based study of 496 adolescent girls to identify qualitatively distinct substance use and substance abuse developmental trajectory groups and tested whether the problematic groups differed from the non-problematic groups on baseline and outcome validation variables. Results identified four substance use groups (late…

  8. ''A Burden in Your Heart'': Lessons of Disclosure from Female Preadolescent and Adolescent Survivors of Sexual Abuse

    Science.gov (United States)

    Staller, Karen M.; Nelson-Gardell, Debra

    2005-01-01

    Objectives: To enhance understanding of the sexual abuse disclosure process from the perspective of preteen and teenage survivors. To reconsider prominent models of the disclosure process in light of our findings. Methods: We conducted a secondary analysis of data from four focus groups in which 34 preadolescent and adolescent female survivors of…

  9. The Impact of Education and School-Based Counseling on Children's and Adolescents' Views of Substance Abuse

    Science.gov (United States)

    Anderson, Shawanda W.; Moore, Paula A.

    2009-01-01

    The purpose of this study was to investigate if a school-based education and counseling program (Life Skills Training Program) would have an impact on school-aged children/adolescents' views of substance abuse. The study also investigated the degree and direction of change. Participants were 338 elementary or middle-school students in the metro…

  10. Relations between Parent Psychopathology, Family Functioning, and Adolescent Problems in Substance-Abusing Families: Disaggregating the Effects of Parent Gender

    Science.gov (United States)

    Burstein, Marcy; Stanger, Catherine; Dumenci, Levent

    2012-01-01

    The present study: (1) examined relations between parent psychopathology and adolescent internalizing problems, externalizing problems, and substance use in substance-abusing families; and (2) tested family functioning problems as mediators of these relations. Structural equation modeling was used to estimate the independent effects of parent…

  11. The Prevalence of Childhood Sexual Abuse and Adolescent Unwanted Sexual Contact among Boys and Girls Living in Victoria, Australia

    Science.gov (United States)

    Moore, Elya E.; Romaniuk, Helena; Olsson, Craig A.; Jayasinghe, Yasmin; Carlin, John B.; Patton, George C.

    2010-01-01

    Objectives: Childhood sexual abuse (CSA) is associated with both short- and long-term adverse mental and physical health consequences, yet there remains considerable controversy about the prevalence of CSA in the general population. There is also little prospective data on unwanted sexual contact (USC) collected during adolescence. Methods: Data…

  12. Multidimensional family therapy decreases the rate of externalising behavioural disorder symptoms in cannabis abusing adolescents: Outcomes of the INCANT trial

    NARCIS (Netherlands)

    M. Schaub (Michael); C.E. Henderson (Craig); I. Pelc (Isidore); P. Tossmann (Peter); O. Phan (Olivier); V. Hendriks (Vincent); C. Rowe (Cindy); H. Rigter (Henk)

    2014-01-01

    textabstractBackground: US-based trials have shown that Multidimensional Family Therapy (MDFT) not only reduces substance abuse among adolescents, but also decreases mental and behavioural disorder symptoms, most notably externalising symptoms. In the INCANT trial, MDFT decreased the rate of cannabi

  13. Delineating selection and mediation effects among childhood personality and environmental risk factors in the development of adolescent substance abuse.

    Science.gov (United States)

    Hicks, Brian M; Johnson, Wendy; Durbin, C Emily; Blonigen, Daniel M; Iacono, William G; McGue, Matt

    2014-01-01

    Utilizing the large, longitudinal Minnesota Twin Family Study (N = 2510; 96 % European American ancestry), we examined the influence of several person-environment transactions on adolescent substance abuse. We focused on the two childhood personality traits found to be most predictive of substance abuse in this sample-socialization (willingness to follow rules and endorse conventional values) and boldness (social engagement and assurance, stress resilience, thrill seeking)-and the environmental variables of antisocial and prosocial peers, academic engagement, parent-child relationship quality, and stressful life events. Path analysis revealed that low socialization had a selection effect for each environmental risk factor, that is, socialization at age 11 predicted environmental risk at age 14, after controlling for the stability of the environmental variables from ages 11 to 14. Antisocial peers and academic engagement at age 14 then mediated some of the risk of low socialization on substance abuse at age 17, but the majority of risk for substance abuse was accounted for by the stability of socialization from age 11 to 14. Boldness at age 11 also increased risk for substance abuse, but did so primarily via a direct effect. The findings help to parse the nature of person-environment transactions across multiple personality traits and contextual risk factors that contribute to adolescent substance abuse.

  14. Anxiety disorders and depression among high school adolescents and youths in Nigeria: Understanding differential effects of physical abuse at home and school.

    Science.gov (United States)

    Fakunmoju, Sunday B; Bammeke, Funmi O

    2015-07-01

    Despite the exposure of children to physical abuse in more than one setting in many regions of the world, little is known about the associations of physical abuse in different settings (e.g., at home and school) with anxiety disorders and depression among adolescents and youths. Using a convenience sample of 502 adolescents and youths ages 13-23 years from five public and three private senior secondary schools in Nigeria, the study examined associations of gender and physical abuse by parents with anxiety disorders as well as associations of physical abuse by parents and/or teachers with depression in the sample, 39.6% of whom had experienced physical abuse at home and in school. Findings suggest that physical abuse by parents was associated with anxiety disorders and depression than physical abuse by teachers. Being female was equally associated with anxiety disorders. Implications of findings for mental health, practice, research, and theory are discussed.

  15. Runaway electrons and ITER

    Science.gov (United States)

    Boozer, Allen

    2016-10-01

    ITER planning for avoiding runaway damage depends on magnetic surface breakup in fast relaxations. These arise in thermal quenches and in the spreading of impurities from massive gas injection or shattered pellets. Surface breakup would prevent a runaway to relativistic energies were it not for non-intercepting flux tubes, which contain magnetic field lines that do not intercept the walls. Such tubes persist near the magnetic axis and in the cores of islands but must dissipate before any confining surfaces re-form. Otherwise, a highly dangerous situation arises. Electrons that were trapped and accelerated in these flux tubes can fill a large volume of stochastic field lines and serve as a seed for the transfer of the full plasma current to runaways. If the outer confining surfaces are punctured, as by a drift into the wall, then the full runaway inventory will be lost in a short pulse along a narrow flux tube. Although not part of ITER planning, currents induced in the walls by the fast magnetic relaxation could be used to passively prevent outer surfaces re-forming. If magnetic surface breakup can be avoided during impurity injection, the plasma current could be terminated in tens of milliseconds by plasma cooling with no danger of runaway. Support by DoE Office of Fusion Energy Science Grant De-FG02-03ER54696.

  16. Runaway snakes in TEXTOR-94

    NARCIS (Netherlands)

    Entrop, I.; R. Jaspers,; Cardozo, N. J. L.; Finken, K.H.

    1999-01-01

    Observations of a runaway beam confined in an island-like structure, a so-called runaway snake, are reported. The observations are made in TEXTOR-94 by measurement of synchrotron radiation emitted by these runaways. A full poloidal View allows for the study of the synchrotron pattern of the snake to

  17. Perpetration, revictimization, and self-injury: traumatic reenactments of child sexual abuse in a nonclinical sample of South African adolescents.

    Science.gov (United States)

    Penning, Susan L; Collings, Steven J

    2014-01-01

    Risk factors for traumatic reenactments of child sexual abuse experiences (perpetration, revictimization, and self-injury) were examined in a sample of 718 South African secondary school adolescents. Logistic regression analyses indicated that the most consistent predictors of reenactments were a history of child sexual abuse (rape and/or indecent assault) and respondents' gender, with males being significantly more likely than females to report perpetration (OR = 13.5) and females being more likely to report revictimization (OR = 3.2) and self-injury (OR = 2.5). An analysis restricted to respondents with a history of child sexual abuse indicated that negative abuse-related cognitions were the most consistent predictor of all forms of traumatic reenactment.

  18. The roles of emotional competence and social problem-solving in the relationship between physical abuse and adolescent suicidal ideation in China.

    Science.gov (United States)

    Kwok, Sylvia Y C L; Yeung, Jerf W K; Low, Andrew Y T; Lo, Herman H M; Tam, Cherry H L

    2015-06-01

    The study investigated the relationship among physical abuse, positive psychological factors including emotional competence and social problem-solving, and suicidal ideation among adolescents in China. The possible moderating effects of emotional competence and social problem-solving in the association between physical abuse and adolescent suicidal ideation were also studied. A cross-sectional survey employing convenience sampling was conducted and self-administered questionnaires were collected from 527 adolescents with mean age of 14 years from the schools in Shanghai. Results showed that physical abuse was significantly and positively related to suicidal ideation in both male and female adolescents. Emotional competence was not found to be significantly associated with adolescent suicidal ideation, but rational problem-solving, a sub-scale of social problem-solving, was shown to be significantly and negatively associated with suicidal ideation for males, but not for females. However, emotional competence and rational problem-solving were shown to be a significant and a marginally significant moderator in the relationship between physical abuse and suicidal ideation in females respectively, but not in males. High rational problem-solving buffered the negative impact of physical abuse on suicidal ideation for females. Interestingly, females with higher empathy and who reported being physically abused by their parents have higher suicidal ideation. Findings are discussed and implications are stated. It is suggested to change the attitudes of parents on the concept of physical abuse, guide them on appropriate attitudes, knowledge and skills in parenting, and enhance adolescents' skills in rational problem-solving.

  19. Paternal and maternal influences on the psychological well-being, substance abuse, and delinquency of Chinese adolescents experiencing economic disadvantage.

    Science.gov (United States)

    Shek, Daniel T L

    2005-03-01

    On two occasions separated by one year, Chinese adolescents with economic disadvantage in Hong Kong (N = 199) responded to instruments measuring perceived parental parenthood qualities (indexed by perceived parenting styles, support and help from parents, and conflict and relationship with the parents) and psychosocial adjustment (psychological well-being, substance abuse, and delinquency). Results showed that parental parenthood variables were concurrently associated with different measures of adolescent psychological well-being and problem behavior at Time 1 and Time 2. While paternal parenthood qualities at Time 1 predicted changes in existential well-being and delinquency in adolescent boys, but not in adolescent girls, at Time 2, maternal parenthood qualities at Time 1 predicted changes in the mental health and problem behavior in adolescent girls, but not in adolescent boys, at Time 2. There is no strong support for the thesis that adolescent adjustment influences perceived parental parenthood qualities over time. The present study suggests that the influences of fathers and mothers on the adjustment of Chinese adolescents experiencing economic disadvantage vary with the gender of adolescent children.

  20. Self-attributions of blame in sexually abused adolescents: a mediational model.

    Science.gov (United States)

    Daigneault, Isabelle; Tourigny, Marc; Hébert, Martine

    2006-02-01

    This study evaluates the mediational role of general attributions in explaining the impact of specific attributions regarding sexual abuse (SA) on six posttraumatic symptoms. One hundred three SA female adolescents (13-17 years old) completed the Trauma Symptoms Checklist for Children (TSCC; Briere, 1989), the blame/guilt subscale of the Children's Impact of Traumatic Events Scale (CITES-R; Wolfe, Gentile, Michienzi, Sas, & Wolfe, 1991), and the Personal Attributions for Negative Events subscale of the Children's Attributions and Perceptions Scale (CAPS; Mannarino, Cohen, & Berman, 1994). Results indicate that general attributions act as a mediator between specific attributions and six posttraumatic symptoms (i.e., anxiety, depression, sexual concerns, posttraumatic stress, dissociation, and anger).

  1. Maternal drug abuse versus maternal depression: vulnerability and resilience among school-age and adolescent offspring.

    Science.gov (United States)

    Luthar, Suniya S; Sexton, Chris C

    2007-01-01

    In this study of 360 low-income mother-child dyads, our primary goal was to disentangle risks linked with commonly co-occurring maternal diagnoses: substance abuse and affective/anxiety disorders. Variable- and person-based analyses suggest that, at least through children's early adolescence, maternal drug use is no more inimical for them than is maternal depression. A second goal was to illuminate vulnerability and protective processes linked with mothers' everyday functioning, and results showed that negative parenting behaviors were linked with multiple adverse child outcomes. Conversely, the other parenting dimensions showed more domain specificity; parenting stress was linked with children's lifetime diagnoses, and limit setting and closeness with children's externalizing problems and everyday competence, respectively. Results are discussed in terms of implications for resilience theory, interventions, and social policy.

  2. Exploring the Role of Self-Esteem and Parenting Patterns on Alcohol Use and Abuse Among Adolescents

    Science.gov (United States)

    Glozah, Franklin N.

    2014-01-01

    The type of parental child-rearing practices used by parents and guardians substantially influence children’s self-esteem and consequently their decision to engage in alcohol use, its abuse. The aim of this study was to explore the role of self-esteem and parenting patterns on alcohol use and abuse among adolescents. Three hundred and sixteen boys and girls in Senior High Schools completed self-report questionnaires assessing self-esteem, parenting patterns and alcohol use and abuse. The results showed that while girls reported lesser self-esteem than boys, boys reported higher levels of alcohol use and abuse than girls. Also, authoritative parenting pattern had a positive effect on self-esteem and a negative effect on alcohol use. On the other hand, authoritarian and permissive parenting patterns had negative effects on self-esteem and positive effects on alcohol use, with slight variations. These results provide valuable information regarding strategies aimed at fostering parent-child relationship and rapport with the ultimate aim of bolstering the self-esteem of adolescents to subsequently eschew insalubrious behaviour, particularly alcohol use and abuse. PMID:26973951

  3. Exploring the role of self-esteem and parenting patterns on alcohol use and abuse among adolescents

    Directory of Open Access Journals (Sweden)

    Franklin N. Glozah

    2014-10-01

    Full Text Available The type of parental child-rearing practices used by parents and guardians substantially influence children’s self-esteem and consequently their decision to engage in alcohol use, its abuse. The aim of this study was to explore the role of self-esteem and parenting patterns on alcohol use and abuse among adolescents. Three hundred and sixteen boys and girls in Senior High Schools completed self-report questionnaires assessing self-esteem, parenting patterns and alcohol use and abuse. The results showed that while girls reported lesser self-esteem than boys, boys reported higher levels of alcohol use and abuse than girls. Also, authoritative parenting pattern had a positive effect on self-esteem and a negative effect on alcohol use. On the other hand, authoritarian and permissive parenting patterns had negative effects on self-esteem and positive effects on alcohol use, with slight variations. These results provide valuable information regarding strategies aimed at fostering parent-child relationship and rapport with the ultimate aim of bolstering the self-esteem of adolescents to subsequently eschew insalubrious behaviour, particularly alcohol use and abuse.

  4. Exploring the Role of Self-Esteem and Parenting Patterns on Alcohol Use and Abuse Among Adolescents.

    Science.gov (United States)

    Glozah, Franklin N

    2014-11-06

    The type of parental child-rearing practices used by parents and guardians substantially influence children's self-esteem and consequently their decision to engage in alcohol use, its abuse. The aim of this study was to explore the role of self-esteem and parenting patterns on alcohol use and abuse among adolescents. Three hundred and sixteen boys and girls in Senior High Schools completed self-report questionnaires assessing self-esteem, parenting patterns and alcohol use and abuse. The results showed that while girls reported lesser self-esteem than boys, boys reported higher levels of alcohol use and abuse than girls. Also, authoritative parenting pattern had a positive effect on self-esteem and a negative effect on alcohol use. On the other hand, authoritarian and permissive parenting patterns had negative effects on self-esteem and positive effects on alcohol use, with slight variations. These results provide valuable information regarding strategies aimed at fostering parent-child relationship and rapport with the ultimate aim of bolstering the self-esteem of adolescents to subsequently eschew insalubrious behaviour, particularly alcohol use and abuse.

  5. Adolescent friend similarity on alcohol abuse as a function of participation in romantic relationships: Sometimes a new love comes between old friends.

    Science.gov (United States)

    DeLay, Dawn; Laursen, Brett; Bukowski, William M; Kerr, Margaret; Stattin, Håkan

    2016-01-01

    This study tests the hypothesis that adolescents with romantic partners are less similar to their friends on rates of alcohol abuse than adolescents without romantic partners. Participants (662 girls, 574 boys) ranging in age from 12 to 19 years nominated friends and romantic partners, and completed a measure of alcohol abuse. In hierarchical linear models, friends with romantic partners were less similar on rates of alcohol abuse than friends without romantic partners, especially if they were older and less accepted. Follow-up longitudinal analyses were conducted on a subsample (266 boys, 374 girls) of adolescents who reported friendships that were stable across 2 consecutive years. Associations between friend reports of alcohol abuse declined after adolescents became involved in a romantic relationship, to the point at which they became more similar to their romantic partners than to their friends. (PsycINFO Database Record

  6. Runaways in History

    Science.gov (United States)

    Lipschutz, Mark R.

    1977-01-01

    Although running away is a glorified part of American folk tradition, today's runaway runs afoul of a host of laws, including those which make the act itself illegal. This article examines the history of the social and legal status of youth and why they run away. (Author)

  7. Substance use or abuse, internet use, psychopathology and suicidal ideation in adolescents?

    Science.gov (United States)

    Bousoño Serrano, Matilde; Al-Halabí, Susana; Burón, Patricia; Garrido, Marlen; Díaz-Mesa, Eva María; Galván, Gonzalo; García-Álvarez, Leticia; Carli, Vladimir; Hoven, Christina; Sarchiapone, Marco; Wasserman, Danuta; Bousoño, Manuel; García-Portilla, María Paz; Iglesias, Celso; Sáiz, Pilar Alejandra; Bobes, Julio

    2017-01-12

    Substance and Internet use or abuse, psychopathology and suicidal ideation appear to be related. The aim of this study is to investigate the association between use of psychotropic substances, inadequate Internet use, suicidal ideation and other psychopathological symptoms within the adolescent population. The present study was carried out as part of the Saving and Empowering Young Lives in Europe (SEYLE) project, funded by the European Union. The sample is composed of 1026 adolescents aged between 14 and 16 years from 12 state schools in Asturias (530 men and 496 women). This study adds to the possibility of knowing whether the SEYLE data is confirmed in a relatively isolated and recession hit province of Spain. In the present study the following consumption rates were obtained: a) alcohol 11.89% in males and 7.86% in females; b) tobacco: 4.15% and 5.44 % in males and females respectively; c) other drugs: 6.98% in males and 4.44% in females; d) maladaptive or pathological Internet use: 14.53% and 20.77% in males and females respectively. The variables that predict suicide ideation in the logistic regression model were: previous suicide attempts, depression, maladaptive or pathological Internet use, peer problems and alcohol consumption.

  8. Family-Based Intervention Program for Parents of Substance-Abusing Youth and Adolescents

    Science.gov (United States)

    Bisetto Pons, David; González Barrón, Remedios

    2016-01-01

    The use of drugs among adolescents/youth often results in a high degree of distress for the family members who live with them. This in turn can lead to a deterioration of mental (psychological) health, hindering any attempt to successfully cope with the situation. The goal of our research was to study the effect of the Community Reinforcement and Family Training (CRAFT) program on parents of adolescents/young adult drug users. Study volunteers (n = 50) were parents from Valencia (Spain) that were divided into two groups. The experimental group (n = 25) was made up of parents whose sons and daughters exhibited problems with drug use and the constructed noncausal baseline group (n = 25) was made up of parents whose sons and daughters did not show any substance abuse problems. For both groups, self-esteem (Rosenberg Self-Esteem Scale), depression (BDI-II), anxiety (STAI), and anger (STAXI-II) were evaluated before and after the application of the CRAFT program. Results show a significant improvement in the experimental group's self-esteem, depression, and anger state and a decrease in negative moods. These changes in parents produce a positive effect on their substance-using sons and daughters: of the 25 participants, 15 contacted specialized addiction treatment resources for the first time. PMID:27800208

  9. Does incentive-elicited nucleus accumbens activation differ by substance of abuse? An examination with adolescents.

    Science.gov (United States)

    Karoly, Hollis C; Bryan, Angela D; Weiland, Barbara J; Mayer, Andrew; Dodd, Andrew; Feldstein Ewing, Sarah W

    2015-12-01

    Numerous questions surround the nature of reward processing in the developing adolescent brain, particularly in regard to polysubstance use. We therefore sought to examine incentive-elicited brain activation in the context of three common substances of abuse (cannabis, tobacco, and alcohol). Due to the role of the nucleus accumbens (NAcc) in incentive processing, we compared activation in this region during anticipation of reward and loss using a monetary incentive delay (MID) task. Adolescents (ages 14-18; 66% male) were matched on age, gender, and frequency of use of any common substances within six distinct groups: cannabis-only (n=14), tobacco-only (n=34), alcohol-only (n=12), cannabis+tobacco (n=17), cannabis+tobacco+alcohol (n=17), and non-using controls (n=38). All groups showed comparable behavioral performance on the MID task. The tobacco-only group showed decreased bilateral nucleus accumbens (NAcc) activation during reward anticipation as compared to the alcohol-only group, the control group, and both polysubstance groups. Interestingly, no differences emerged between the cannabis-only group and any of the other groups. Results from this study suggest that youth who tend toward single-substance tobacco use may possess behavioral and/or neurobiological characteristics that differentiate them from both their substance-using and non-substance-using peers.

  10. Family-Based Intervention Program for Parents of Substance-Abusing Youth and Adolescents

    Directory of Open Access Journals (Sweden)

    David Bisetto Pons

    2016-01-01

    Full Text Available The use of drugs among adolescents/youth often results in a high degree of distress for the family members who live with them. This in turn can lead to a deterioration of mental (psychological health, hindering any attempt to successfully cope with the situation. The goal of our research was to study the effect of the Community Reinforcement and Family Training (CRAFT program on parents of adolescents/young adult drug users. Study volunteers (n=50 were parents from Valencia (Spain that were divided into two groups. The experimental group (n=25 was made up of parents whose sons and daughters exhibited problems with drug use and the constructed noncausal baseline group (n=25 was made up of parents whose sons and daughters did not show any substance abuse problems. For both groups, self-esteem (Rosenberg Self-Esteem Scale, depression (BDI-II, anxiety (STAI, and anger (STAXI-II were evaluated before and after the application of the CRAFT program. Results show a significant improvement in the experimental group’s self-esteem, depression, and anger state and a decrease in negative moods. These changes in parents produce a positive effect on their substance-using sons and daughters: of the 25 participants, 15 contacted specialized addiction treatment resources for the first time.

  11. Testing the Cycle of Violence Hypothesis: Child Abuse and Adolescent Dating Violence as Predictors of Intimate Partner Violence in Young Adulthood

    Science.gov (United States)

    Gomez, Anu Manchikanti

    2011-01-01

    Child abuse is an important determinant of future violence perpetration and victimization. Past research examining linkages between child abuse and adult intimate partner violence (IPV) has predominantly focused on married individuals and not considered adolescent dating violence. In the present study, data from three waves of the National…

  12. Moderating Factors in the Path from Physical Abuse to Attempted Suicide in Adolescents: Application of the Interpersonal-Psychological Theory of Suicide

    Science.gov (United States)

    Cero, Ian; Sifers, Sarah

    2013-01-01

    Childhood physical abuse is a major risk factor for suicide attempt, but factors that moderate this risk remain largely unexamined. Moderated mediation analysis was used with 186 adolescents who responded to the Profiles of Student Life: Attitudes and Behavior survey. Physical abuse increased risk directly and indirectly through reduced…

  13. Confirmation of childhood abuse in child and adolescent cases of multiple personality disorder and dissociative disorder not otherwise specified.

    Science.gov (United States)

    Coons, P M

    1994-08-01

    The diagnostic validity of multiple personality disorder (MPD) and its association to trauma have been questioned because corroboration of child abuse in studies of patients with MPD is scant. The purpose of this study was to determine on a retrospective basis whether external corroboration of child abuse could be found in a group of patients with MPD and dissociative disorder not otherwise specified. A group of child and adolescent psychiatric inpatients and outpatients was chosen because of the extensive number of collateral records collected on them in a tertiary care setting. This group was also chosen because of the intense interest paid by child protective services and courts to child abuse during the past 15 years. This retrospective chart review confirmed child abuse in eight of nine patients with MPD and in all 12 cases of dissociative disorder not otherwise specified. This study provides further evidence of the association of severe dissociative disorders with trauma, particularly child abuse. Future studies should be prospective and blinded to avoid the possibility of investigator bias, and should include a control group for comparison of base rate of child abuse.

  14. Some theoretical models and constructs generic to substance abuse prevention programs for adolescents: possible relevance and limitations for problem gambling.

    Science.gov (United States)

    Evans, Richard I

    2003-01-01

    For the past several years the author and his colleagues have explored the area of how social psychological constructs and theoretical models can be applied to the prevention of health threatening behaviors in adolescents. In examining the need for the development of gambling prevention programs for adolescents, it might be of value to consider the application of such constructs and theoretical models as a foundation to the development of prevention programs in this emerging problem behavior among adolescents. In order to provide perspective to the reader, the present paper reviews the history of various psychosocial models and constructs generic to programs directed at prevention of substance abuse in adolescents. A brief history of some of these models, possibly most applicable to gambling prevention programs, are presented. Social inoculation, reasoned action, planned behavior, and problem behavior theory, are among those discussed. Some deficits of these models, are also articulated. How such models may have relevance to developing programs for prevention of problem gambling in adolescents is also discussed. However, the inherent differences between gambling and more directly health threatening behaviors such as substance abuse must, of course, be seriously considered in utilizing such models. Most current gambling prevention programs have seldom been guided by theoretical models. Developers of gambling prevention programs should consider theoretical foundations, particularly since such foundations not only provide a guide for programs, but may become critical tools in evaluating their effectiveness.

  15. Factors associated with reporting of abuse against children and adolescents by nurses within Primary Health Care1

    Science.gov (United States)

    Rolim, Ana Carine Arruda; Moreira, Gracyelle Alves Remigio; Gondim, Sarah Maria Mendes; Paz, Soraya da Silva; Vieira, Luiza Jane Eyre de Souza

    2014-01-01

    OBJECTIVE: to analyze the factors associated with the underreporting on the part of nurses within Primary Health Care of abuse against children and adolescents. METHOD: cross-sectional study with 616 nurses. A questionnaire addressed socio-demographic data, profession, instrumentation and knowledge on the topic, identification and reporting of abuse cases. Bivariate and multivariate logistic regression was used. RESULTS: female nurses, aged between 21 and 32 years old, not married, with five or more years since graduation, with graduate studies, and working for five or more years in PHC predominated. The final regression model showed that factors such as working for five or more years, having a reporting form within the PHC unit, and believing that reporting within Primary Health Care is an advantage, facilitate reporting. CONCLUSION: the study's results may, in addition to sensitizing nurses, support management professionals in establishing strategies intended to produce compliance with reporting as a legal device that ensures the rights of children and adolescents. PMID:25591102

  16. Mii School: New 3D Technologies Applied in Education to Detect Drug Abuses and Bullying in Adolescents

    Science.gov (United States)

    Carmona, José Alberto; Espínola, Moisés; Cangas, Adolfo J.; Iribarne, Luis

    Mii School is a 3D school simulator developed with Blender and used by psychology researchers for the detection of drugs abuses, bullying and mental disorders in adolescents. The school simulator created is an interactive video game where the players, in this case the students, have to choose, along 17 scenes simulated, the options that better define their personalities. In this paper we present a technical characteristics description and the first results obtained in a real school.

  17. Child abuse and neglect: relations to adolescent binge drinking in the national longitudinal study of Adolescent Health (AddHealth) Study.

    Science.gov (United States)

    Shin, Sunny Hyucksun; Edwards, Erika M; Heeren, Timothy

    2009-03-01

    The purpose of this study was to examine the relationship between child maltreatment and adolescent binge drinking. Given that many victimized children have been maltreated in multiple ways, we examine the effects of co-occurrence of multiple types of maltreatment on adolescent binge drinking. We used the National Longitudinal Study of Adolescent Health (AddHealth), which included a nationally representative sample of adolescents (n=12,748). Adolescent binge drinking was defined as five or more drinks in a row at least 2-3 times per month in the past year. Among those reporting any maltreatment, 12.4% reported binge drinking compared to 9.9% among those reporting no maltreatment. Logistic regression models found that child maltreatment is a robust risk factor for adolescent binge drinking controlling for parental alcoholism. In particular, all types of or combinations of types of maltreatment were strongly associated with adolescent binge drinking, controlling for age, gender, race, parental alcoholism and monitoring. Research examining the effect of childhood maltreatment on later alcohol abuse needs to recognize the clustering effects of multiple types of childhood maltreatment on alcohol problems.

  18. Effectiveness of Skill-Based Substance Abuse Intervention among Male Adolescents in an Islamic Country: Case of the Islamic Republic of Iran

    Science.gov (United States)

    Allahverdipour, Hamid; Bazargan, Mohsen; Farhadinasab, Abdollah; Hidarnia, Alireza; Bashirian, Saeed

    2009-01-01

    The prevalence of substance abuse among adolescents from low- and middle-income countries is increasing drastically and requires immediate intervention. The objective of this longitudinal quasi-experimental panel study was to design and implement a skill-based intervention to prevent and reduce substance use among urban adolescents who attended 2…

  19. Anxious Attachment, Social Isolation, and Indicators of Sex Drive and Compulsivity: Predictors of Child Sexual Abuse Perpetration in Adolescent Males?

    Science.gov (United States)

    Miner, Michael H; Swinburne Romine, Rebecca; Robinson, Beatrice Bean E; Berg, Dianne; Knight, Raymond A

    2016-03-01

    It has been suggested that child sexual abuse is related to poor attachment to parents, which is associated with an inability to form intimate relationships. Seto and Lalumière indicated that there were too few studies of adolescent males to determine whether poor attachment was associated with perpetration. This study was designed to follow up on a previous study and further explored the association between insecure attachment to parents, social isolation, and interpersonal adequacy to child sexual abuse perpetration in adolescents. We compared two samples of adolescent males who had committed sexual offenses, those who committed offenses against children (n = 140) and those who committed offenses against peer or adults (n = 92), with a sample of similarly aged males in treatment for mental health or substance use issues (n = 93). Data were collected using a semi-structured interview and computer-administered questionnaire. We found an indirect association between anxious attachment and sexual offenses against child victims, which was accounted for by measures of social involvement and social isolation. These involvement and isolation measures also did not have a direct association with sexual offenses against child victims, in that their contribution was accounted for by a measure of Masculine Adequacy. This Masculine Adequacy, combined with decreased levels of Sexual Preoccupation and Hypersexuality and increased Sexual Compulsivity, was associated with commission of child sexual abuse. The interpersonal variables did not enter a model predicting sexual offending against peers/adults, which seemed solely associated with the interaction between Sexual Compulsivity and Hypersexuality.

  20. Inflation Expels Runaways

    OpenAIRE

    Bachlechner, Thomas C.

    2016-01-01

    We argue that moduli stabilization generically restricts the evolution following transitions between weakly coupled de Sitter vacua and can induce a strong selection bias towards inflationary cosmologies. The energy density of domain walls between vacua typically destabilizes Kahler moduli and triggers a runaway towards large volume. This decompactification phase can collapse the new de Sitter region unless a minimum amount of inflation occurs after the transition. A stable vacuum transition ...

  1. Parental involvement, psychological distress, and sleep: a preliminary examination in sleep-disturbed adolescents with a history of substance abuse.

    Science.gov (United States)

    Cousins, Jennifer C; Bootzin, Richard R; Stevens, Sally J; Ruiz, Bridget S; Haynes, Patricia L

    2007-03-01

    The relationships between family environment and psychological distress and between psychological distress and sleep disturbance in adolescents are well established. However, less is known about the influence of family environment on sleep disturbance. The authors' goal is to examine the effects of parental involvement on psychological distress and sleep disturbance in 34 adolescents with a history of substance abuse. Linear regression techniques and confidence intervals were used to test the significance of mediation analyses. Lower levels of parental involvement were associated with higher levels of psychological distress, and higher levels of psychological distress were associated with lower sleep efficiency and more time spent in bed. Follow-up analyses found that higher levels of parental involvement were associated with earlier morning arising times, when controlling for psychological distress. These data indicate that psychological distress is important to consider when examining the relationship between parental involvement and sleep in adolescents.

  2. Runaway losses in ergodized plasmas

    Science.gov (United States)

    Finken, K. H.; Abdullaev, S. S.; Jakubowski, M. W.; Jaspers, R.; Lehnen, M.; Schlickeiser, R.; Spatschek, K. H.; Wingen, A.; Wolf, R.; TEXTOR Team

    2007-02-01

    New results from the generation of runaways and the loss of runaway electrons in an ergodized magnetic field are presented. For the generation process, a clear difference between a 'normal' and a clean, freshly boronized wall condition has been found. Under clean wall conditions, one observes at low densities not only the runaway electrons with energies up to 30 MeV and at discharges with even lower electron density one finds more runaway electrons but at an energy in the low-MeV regime. The runaway electrons are utilized as test particles for revealing the ergodized magnetic field line structure. For the measurements the m/n = 6/2 base mode configuration of the dynamic ergodic divertor (DED), has been applied. One observes a clear modification of the radial runaway profile with preferential losses in the ergodized zone. From the loss rate of the runaway electrons due to ergodization and from the redistribution of the runaways after the DED phase, the diffusion rate is estimated to be of the order of 0.1 m2 s-1.

  3. Impact of Abuse History on Adolescent African-American Women’s Current HIV/STD-associated Behaviors and Psychosocial Mediators of HIV/STD Risk

    Science.gov (United States)

    Brown, Jennifer L.; Young, April M.; Sales, Jessica M.; DiClemente, Ralph J.; Rose, Eve S.; Wingood, Gina M.

    2014-01-01

    This study examined if relationship power, sex refusal self-efficacy, and/or fear of condom negotiation mediated the relationship between abuse history and consistent condom use (CCU) among African-American female adolescents (n=593). Participants with an abuse history (58%) were less likely to report CCU (p=.003). Women with an abuse history reported less relationship power (p=.006) and self-efficacy for refusing sex (p<.001), and more fear of condom negotiation (p=.003), none of which independently or jointly mediated the association between abuse and CCU. Notably, history of abuse was associated with CCU across mediator models (p=.037 to p=.067), despite inclusion of psychosocial mediators. This study demonstrates the importance of understanding adolescents’ condom use behaviors within the context of their life experiences, especially past abuse history. PMID:25505369

  4. On the interaction between drugs of abuse and adolescent social behavior

    NARCIS (Netherlands)

    Trezza, V.; Baarendse, P.J.J.; Vanderschuren, L.J.M.J.

    2014-01-01

    Rationale Social factors influence drug abuse. Conversely, drugs of abuse alter social behavior. This is especially pertinent during post-weaning development, when there are profound changes in the social repertoire, and the sensitivity to the positive and negative effects of drugs of abuse is alter

  5. Adolescent suicide in New York City: plenty of room for new research.

    Science.gov (United States)

    Ganz, Debora; Sher, Leo

    2012-01-01

    The act of adolescent suicide continues to threaten adolescent populations in New York City (NYC). Consistent positive correlations have been found between a plethora of risk factors present in NYC adolescent populations and suicidal ideations and behaviors. Psychiatric conditions that may contribute to the rate of adolescent suicide in NYC include depression, bipolar disorder, substance abuse and schizophrenia. Unique factors that have been found to contribute to increased rates of completed suicides in NYC include the phenomena of railway suicides and suicide tourism. Homelessness and income inequality in NYC have also been consistently correlated with increased suicidality; with one study finding suicide attempts reported by a significant percentage of new admissions to homeless shelters. Adolescent populations in NYC that have been identified as particularly vulnerable to suicidality include runaway youth, homosexual youth, victimized adolescents and adolescents with a recent history of posttraumatic stress disorder (PTSD). Longitudinal studies in NYC have found that physical and sexual abuse is highly predictive of adolescent suicidality, with variations by ethnic group. Currently, there is a disturbing lack of sufficient research on adolescent suicide in NYC, specifically regarding causal factors, the effects of television on suicide, comorbid suicidality and drug abuse, and cultural factors contributing to suicide. This dearth of literature may be related to the ethical problems inherent in suicide research, self reports and/or post mortem analyses.

  6. The Scope of Sexual, Physical, and Psychological Abuse in a Bedouin-Arab Community of Female Adolescents: The Interplay of Racism, Urbanization, Polygamy, Family Honor, and the Social Marginalization of Women

    Science.gov (United States)

    Elbedour, Salman; Abu-Bader, Soleman; Onwuegbuzie, Anthony J.; Abu-Rabia, Aref; El-Aassam, Salman

    2006-01-01

    Objectives: This is an exploratory study of the abuse--especially sexual--of female adolescents in a conservative and traditional Bedouin-Arab community in southern Israel. The objectives were (1) to examine the rate of sexual abuse, (2) to examine the rate of physical and psychological abuse, and (3) to develop regression models to predict these…

  7. Inflation Expels Runaways

    CERN Document Server

    Bachlechner, Thomas C

    2016-01-01

    We argue that moduli stabilization generically restricts the evolution following transitions between weakly coupled de Sitter vacua and can induce a strong selection bias towards inflationary cosmologies. The energy density of domain walls between vacua typically destabilizes Kahler moduli and triggers a runaway towards large volume. This decompactification phase can collapse the new de Sitter region unless a minimum amount of inflation occurs after the transition. A stable vacuum transition is guaranteed only if the inflationary expansion generates overlapping past light cones for all observable modes originating from the time of reheating, which leads to an approximately flat and isotropic universe. High scale inflation is vastly favored. Our results point towards a framework for studying parameter fine-tuning and inflationary initial conditions in flux compactifications.

  8. Inflation expels runaways

    Science.gov (United States)

    Bachlechner, Thomas C.

    2016-12-01

    We argue that moduli stabilization generically restricts the evolution following transitions between weakly coupled de Sitter vacua and can induce a strong selection bias towards inflationary cosmologies. The energy density of domain walls between vacua typically destabilizes Kähler moduli and triggers a runaway towards large volume. This decompactification phase can collapse the new de Sitter region unless a minimum amount of inflation occurs after the transition. A stable vacuum transition is guaranteed only if the inflationary expansion generates overlapping past light cones for all observable modes originating from the reheating surface, which leads to an approximately flat and isotropic universe. High scale inflation is vastly favored. Our results point towards a framework for studying parameter fine-tuning and inflationary initial conditions in flux compactifications.

  9. "They'll Always Find a Way to Get to You": Technology Use in Adolescent Romantic Relationships and Its Role in Dating Violence and Abuse.

    Science.gov (United States)

    Stonard, Karlie E; Bowen, Erica; Walker, Kate; Price, Shelley A

    2015-06-11

    Electronic communication technology (ECT), such as mobile phones and online communication tools, is widely used by adolescents; however, the availability of such tools may have both positive and negative impacts within the context of romantic relationships. While an established literature has documented the nature, prevalence, and impact of traditional forms of adolescent dating violence and abuse (ADVA), limited empirical investigation has focused on the role of ECT in ADVA or what shall be termed technology-assisted adolescent dating violence and abuse (TAADVA) and how adolescents perceive the impact of TAADVA relative to ADVA. In this article, the authors explore the role ECT plays in adolescent romantic relationships and psychologically abusive and controlling ADVA behaviors and its perceived impact. An opportunity sample of 52 adolescents (22 males and 30 females) between the ages of 12 and 18 years participated in the study. One all-female and seven mixed-gendered semi-structured focus groups were conducted. Thematic analysis was used to identify three superordinate themes, including (a) perceived healthy versus unhealthy communication, (b) perceived monitoring and controlling communication, and (c) perceived impact of technology-assisted abuse compared with that in person. While ECTs had a positive impact on the development and maintenance of adolescent romantic relationships, such tools also provided a new avenue for unhealthy, harassment, monitoring, and controlling behaviors within these relationships. ECT was also perceived to provide unique impacts in terms of making TAADVA seem both less harmful and more harmful than ADVA experienced in person. Adolescents' perceptions and experiences of ECT in romantic relationships and TAADVA may also vary be gender. Implications of the findings are discussed, and recommendations are made for future research.

  10. Prevalence of child abuse in child and adolescent clinical population referred to psychiatric facilities in Tabriz University of Medical Sciences, Iran

    Directory of Open Access Journals (Sweden)

    Seyyed Gholamreza Nourazar

    2014-08-01

    Full Text Available Introduction: The present study was ‎designed to evaluate the prevalence of child abuse in a child and adolescent psychiatric clinical population. Methods: This cross-sectional study was conducted in a clinical population of children and adolescents aged 8-18 years. 80 out-patients and 94 in-patients were selected according to probability proportional to size sampling. Kiddie schedule for affective disorder and schizophrenia questionnaire, a demographic questionnaire, and child abuse self-report scale were filled for each subject. Data were analyzed by using Stata software. Results: Among the out-patient subjects, 50 were male (62.5% and 30 were female (37.5%; for in-patient these subjects numbers were 76 (80.9% and 18 (19.1%, respectively. The mean age of subjects was 15.2 years in the in-patient group and 11.7 years in the out-patient group. In 66.1% of abuse cases the perpetrators were parents, 5.2% siblings, and 28.7% someone else. Among in-patient subjects, summed up prevalence rates of severe and very severe psychological abuse, neglect, physical abuse, and sexual abuse were 11.7, 33.0, 2.1, and 0.0%, respectively; for out-patient subjects these values were 3.8, 11.2, 3.8, and 0.0%, respectively. Moreover, among in-patient subjects, prevalence rates of moderate psychological abuse, neglect, physical abuse, and sexual abuse were 27.7, 27.7, 24.5, and 4.3%, respectively; and for out-patient subjects these values were 30.0, 27.5, 11.2, and 0.0%, respectively. Subjects with attention-deficit/hyperactivity disorder (ADHD suffered a higher rate of physical abuse, whereas, subjects with bipolar mood disorder (BMD suffered a higher rate of sexual abuse. Conclusion: The prevalence of child abuse is highly prevalent in children and adolescents with psychiatric disorders. It is recommended that this population be screened routinely for child abuse.

  11. Mechanisms of Association between Paternal Alcoholism and Abuse of Alcohol and Other Illicit Drugs among Adolescents

    Science.gov (United States)

    Peleg-Oren, Neta; Hospital, Michelle; Morris, Staci Leon; Wagner, Eric F.

    2013-01-01

    The current study examines the effect of paternal alcohol problems on adolescent use of alcohol and other illicit drugs as a function of maternal communication, as well as adolescent social and coping skills (N = 145). Structural equation modeling (SEM) analyses indicated that adolescents with a paternal history of alcohol problems reported higher…

  12. Investigation of relativistic runaway electrons

    Energy Technology Data Exchange (ETDEWEB)

    Jaspers, R.; Lopes Cardozo, N.J.; Schueller, F.C. [FOM-Instituut voor Plasmafysica, Rijnhuizen (Netherlands); Finken, K.H.; Mank, G.; Hoenen, F. [Forschungszentrum Juelich GmbH (Germany). Inst. fuer Plasmaphysik; Boedo, J. [California Univ., Los Angeles, CA (United States). Inst. of Plasma and Fusion Research

    1993-12-31

    The runaway generation during disruptions is regarded as a serious problem in future tokamak devices. The number and the high energy of these runaways can lead to considerable damage of wall components. In the TEXTOR tokamak (R{sub 0}=1.75 m, a=0.46 m; I{sub p}=350 kA, B{sub t}=2.25T, flat top time {approx_equal}2 s), low density discharges (n{sub e} < 1x10{sup 19} m{sup -3}) are analyzed to study the creation mechanism and the energy increase of the runaways. This is mainly done by the synchrotron radiation emitted by highly relativistic runaways (> 20 MeV). The general features of this synchrotron radiation will be described in Sect.2. In Sect.3 the creation rate of runaways is derived from this radiation. An intriguing observation made at the end of low density ohmic discharges is a fast increase in the pitch angle (i.e. the ratio of perpendicular to parallel velocity) from the runaways on a time scale of less than 65 {mu}s. This phenomenon is discussed in Sect.4. Finally some conclusions will be drawn on the implications these results have for future tokamak operation. (author) 4 refs., 3 figs.

  13. Gender differences in the impact of abuse and neglect victimization on adolescent offending behavior

    NARCIS (Netherlands)

    Asscher, J.J.; van der Put, C.E.; Stams, G.J.J.M.

    2015-01-01

    The present study examines gender differences in the association between abuse and neglect during childhood, and sexual and violent offending in juvenile delinquents. Female juvenile delinquents were more frequently victim of sexual and physical abuse and had a history of neglect and maltreatment th

  14. Female Adolescents with a History of Sexual Abuse: Risk Outcome and Protective Factors.

    Science.gov (United States)

    Chandy, Joseph M.; And Others

    1996-01-01

    Examined the school performance, suicidal involvement, disordered eating behaviors, pregnancy risk, and chemical use of female teenagers with a history of sexual abuse. Found that they reported higher rates of adverse outcomes than did teenagers without a background of abuse. Lists protective factors and risk factors that influenced outcomes. (RJM)

  15. Visão atual do abuso sexual na infância e adolescência Current view of sexual abuse in childhood and adolescence

    Directory of Open Access Journals (Sweden)

    Luci Pfeiffer

    2005-11-01

    Full Text Available OBJETIVO: Revisar os aspectos peculiares que envolvem o abuso sexual na infância e na adolescência, oferecendo subsídios para o diagnóstico e conduta corretos, salientando suas conseqüências a curto e longo prazo. FONTES DE DADOS: Revisão da literatura nacional e internacional através do MEDLINE e LILACS, utilizando como palavras-chave "abuso" e "violência sexual" (1988 a 2005, aliada à experiência clínica dos autores. SÍNTESE DOS DADOS: O abuso sexual tem um impacto muito grande na saúde física e mental da criança e do adolescente, deixando marcas em seu desenvolvimento, com danos que podem persistir por toda vida. Sua detecção precoce possibilita o tratamento e acompanhamento adequados, com a minimização das seqüelas. O envolvimento familiar deve ser levado em conta. Todas as distorções de relacionamento necessitam ser avaliadas e tratadas, para que se interrompa sua continuidade, que se dará no abuso intergeracional e na possibilidade de revitimização. A identificação da violência doméstica e dos sinais de alerta físicos e psicológicos para o abuso sexual fazem parte da avaliação. CONCLUSÕES: Todo pediatra precisa estar apto a decodificar os sinais e sintomas que a criança e o adolescente vítimas de abuso sexual trazem consigo. Necessita ser proficiente na escuta, no exame clínico e no tratamento. Deve estar capacitado para o manejo psicológico da situação de violência e ter conhecimento da legislação e meios de proteção legais e sociais existentes em sua comunidade, sempre necessários na assistência às vitimas de abuso sexual.OBJECTIVE: To review single aspects, which involve sexual abuse in childhood and adolescence, giving subsidies for accurate diagnosis and management, emphasizing the short and long-term consequences. SOURCES OF DATA: National and international literature review of the MEDLINE and LILACS databases, using abuse and sexual violence as keywords (1988 to 2005, in addition to

  16. Posttraumatic Stress Symptoms and Trajectories in Child Sexual Abuse Victims: An Analysis of Sex Differences Using the National Survey of Child and Adolescent Well-Being

    Science.gov (United States)

    Maikovich, Andrea Kohn; Koenen, Karestan C.; Jaffee, Sara R.

    2009-01-01

    Very few studies have prospectively examined sex differences in posttraumatic stress symptoms and symptom trajectories in youth victimized by childhood sexual abuse. This study addresses that question in a relatively large sample of children, drawn from the National Survey of Child and Adolescent Well-Being, who were between the ages of 8-16 years…

  17. Longitudinal Study on the Effects of Child Abuse and Children's Exposure to Domestic Violence, Parent-Child Attachments, and Antisocial Behavior in Adolescence

    Science.gov (United States)

    Sousa, Cindy; Herrenkohl, Todd I.; Moylan, Carrie A.; Tajima, Emiko A.; Klika, J. Bart; Herrenkohl, Roy C.; Russo, M. Jean

    2011-01-01

    This study examined the unique and combined effects of child abuse and children's exposure to domestic violence on later attachment to parents and antisocial behavior during adolescence. Analyses also investigated whether the interaction of exposure and low attachment predicted youth outcomes. Findings suggest that, although youth dually exposed…

  18. Does Physical Abuse in Early Childhood Predict Substance Use in Adolescence and Early Adulthood?

    OpenAIRE

    Lansford, Jennifer E.; Dodge, Kenneth A.; Pettit, Gregory S.; BATES, JOHN E.

    2010-01-01

    Prospective longitudinal data from 535 families were used to examine parents’ reports of child physical abuse in the first five years of life as a predictor of substance use at ages 12, 16, and 24. Path analyses revealed that physical abuse in the first five years of life predicted subsequent substance use for females but not males. We found a direct effect of early physical abuse on girls’ substance use at age 12 and indirect effects on substance use at age 16 and age 24 through substance us...

  19. Gene-environment correlation in the development of adolescent substance abuse: selection effects of child personality and mediation via contextual risk factors.

    Science.gov (United States)

    Hicks, Brian M; Johnson, Wendy; Durbin, C Emily; Blonigen, Daniel M; Iacono, William G; McGue, Matt

    2013-02-01

    We used a longitudinal twin design to examine selection effects of personality traits at age 11 on high-risk environmental contexts at age 14 and the extent to which these contexts mediated risk for substance abuse at age 17. Socialization at age 11 (willingness to follow rules and endorse conventional values) predicted exposure to contextual risk at age 14. Contextual risk partially mediated the effect of socialization on substance abuse, though socialization also had a direct effect. In contrast, boldness at age 11 (social engagement and assurance, thrill seeking, and stress resilience) also predicted substance abuse directly but was unrelated to contextual risk. There was substantial overlap in the genetic and shared environmental influences on socialization and contextual risk, and genetic risk in socialization contributed to substance abuse indirectly via increased exposure to contextual risk. This suggests that active gene-environment correlations related to individual differences in socialization contributed to an early, high-risk developmental trajectory for adolescent substance abuse. In contrast, boldness appeared to index an independent and direct genetic risk factor for adolescent substance abuse.

  20. Cannabis abuse in adolescence and the risk of psychosis: a brief review of the preclinical evidence.

    Science.gov (United States)

    Rubino, T; Parolaro, D

    2014-07-03

    Epidemiological studies suggest that Cannabis use during adolescence confers an increased risk for developing psychotic symptoms later in life. However, despite their interest, the epidemiological data are not conclusive, due to their heterogeneity; thus modeling the adolescent phase in animals is useful for investigating the impact of Cannabis use on deviations of adolescent brain development that might confer a vulnerability to later psychotic disorders. Although scant, preclinical data seem to support the presence of impaired social behaviors, cognitive and sensorimotor gating deficits as well as psychotic-like signs in adult rodents after adolescent cannabinoid exposure, clearly suggesting that this exposure may trigger a complex behavioral phenotype closely resembling a schizophrenia-like disorder. Similar treatments performed at adulthood were not able to produce such phenotype, thus pointing to a vulnerability of the adolescent brain towards cannabinoid exposure. The neurobiological substrate of the adolescent vulnerability is still largely unknown and experimental studies need to elucidate the cellular and molecular mechanism underlying these effects. However, the few data available seem to suggest that heavy adolescent exposure to cannabinoids is able to modify neuronal connectivity in specific brain areas long after the end of the treatment. This is likely due to disruption of maturational events within the endocannabinoid system during adolescence that in turn impact on the correct neuronal refinement peculiar of the adolescent brain, thus leading to altered adult brain functionality and behavior.

  1. Observing Differences between Healthy and Unhealthy Adolescent Romantic Relationships: Substance Abuse and Interpersonal Process

    Science.gov (United States)

    Florsheim, Paul; Moore, David R.

    2008-01-01

    Previous research on adolescent romantic relationships has been largely based on self-reports and interview data; as a result, relatively little is known about the interpersonal-behavioral dynamics of adolescent couples. In an attempt to address this gap in the previous literature on young couples, the present study used observational methods to…

  2. Relationship of child abuse with personality features and high risk behaviors in adolescents

    Directory of Open Access Journals (Sweden)

    Mehdi Ghezelseflo

    2015-05-01

    Full Text Available Background: Children are one of the most vulnerable groups of the society and are constantly threatened by different people in their family or society. The aim of this study was investigating the correlation of child abuse with personality features and high risk behavior in high school students of Islamshahr, Iran. Methods: This study cross-sectional analytical was conducted on the high school girls and boys of Islamshahr in spring 2014.528 students were selected by cluster random sampling among 4 high schools (two female and two male high schools. Childhood trauma questionnaire, NEO-Five Factor Inventory and Youth Risk-Taking Scale were used for data collection. Data were analyzed by independence t-test, Pearson's correlation coefficient and multiple linear regression. Results: The results of independence t-test indicated significant differences between girls and boys in terms of child abuse and high risk experience (t=-2.16,p=0.03 and t=-5.03, P=0.001, respectively. Also, the results demonstrated a significant relationship between child abuse and personality characteristics, high risk behavior and all its subscales (P<0.05. The findings of multiple linear regressionindicated that child abuse could explain 14% total risk-taking, 25% neurotic personality feature , 14% extroversion, 10% agreeableness, 1% flexibility and 13% conscientiousness (P<0.05. Conclusion: According to the research findings, appropriate behavior with children is of great importance. Therefore, child abuse would form inappropriate personality features and increase risk behaviors among children.

  3. Substance abuse in early adolescents and HIV preventive behaviors: findings from a school-based cross-sectional survey for the period from 2009 to 2013, Bangkok Thailand.

    Science.gov (United States)

    Thepthien, B; Altaf, L; Chuchareon, P; Srivanichakron, S

    2016-10-01

    This study is first of its kind in Bangkok, and is a five-year (2009-2013) cross-sectional web-based survey to examine HIV preventive behaviors related to substance abuse among adolescents (N = 16,913). The questionnaire was self-administered. Logistic regression was used to analyze the data. The relationship between different types of substance abuse with risky and preventive behaviors was assessed. Male participants reported more substance abuse as compared to females. The risk behaviors observed among the substance abusers include increased sexual experience, multiple sex partners, no use of condoms, and injection drug use. The preventive behaviors include having a high self-risk assessment, going for HIV testing (highest in methamphetamine users), and screening for sexually transmitted infection. Logistic regression suggests that risky behaviors (e.g., sexual experience, injection drug use) are more common in substance abusers. Adolescents are clearly at a high risk. Behavioral preventive measures are needed to reduce or delay premature substance exposure to prevent a wide range of health problems and risks such as HIV and AIDS, injection drug use and unprotected sex.

  4. Shifting the Paradigm: Adolescent Cannabis Abuse and the Need for Early Intervention.

    Science.gov (United States)

    Golick, Jennifer

    2016-01-01

    This article describes the increasing risks of use of marijuana and related products by adolescents. As THC content increases and methods such as "dabbing" increase frequency of use, risks of marijuana use as perceived by youth are decreasing. At a time when marijuana access is increasing nationally, a new marijuana landscape is forming in which both adolescents and treatment providers must adjust their perceptions of what was once thought of as a "harmless" drug. This article describes this new landscape, and what it may mean for adolescent drug treatment.

  5. Effects of early-life abuse differ across development: infant social behavior deficits are followed by adolescent depressive-like behaviors mediated by the amygdala.

    Science.gov (United States)

    Raineki, Charlis; Cortés, Millie Rincón; Belnoue, Laure; Sullivan, Regina M

    2012-05-30

    Abuse during early life, especially from the caregiver, increases vulnerability to develop later-life psychopathologies such as depression. Although signs of depression are typically not expressed until later life, signs of dysfunctional social behavior have been found earlier. How infant abuse alters the trajectory of brain development to produce pathways to pathology is not completely understood. Here we address this question using two different but complementary rat models of early-life abuse from postnatal day 8 (P8) to P12: a naturalistic paradigm, where the mother is provided with insufficient bedding for nest building; and a more controlled paradigm, where infants undergo olfactory classical conditioning. Amygdala neural assessment (c-Fos), as well as social behavior and forced swim tests were performed at preweaning (P20) and adolescence (P45). Our results show that both models of early-life abuse induce deficits in social behavior, even during the preweaning period; however, depressive-like behaviors were observed only during adolescence. Adolescent depressive-like behavior corresponds with an increase in amygdala neural activity in response to forced swim test. A causal relationship between the amygdala and depressive-like behavior was suggested through amygdala temporary deactivation (muscimol infusions), which rescued the depressive-like behavior in the forced swim test. Our results indicate that social behavior deficits in infancy could serve as an early marker for later psychopathology. Moreover, the implication of the amygdala in the ontogeny of depressive-like behaviors in infant abused animals is an important step toward understanding the underlying mechanisms of later-life mental disease associated with early-life abuse.

  6. [Mediating role of emotional regulation between impulsive behavior in gambling, Internet and videogame abuse, and dysfunctional symptomatology in young adults and adolescents].

    Science.gov (United States)

    Estévez Gutiérrez, Ana; Herrero Fernández, David; Sarabia Gonzalvo, Izaskun; Jáuregui Bilbao, Paula

    2014-01-01

    The way emotions are regulated might affect the engagement on risk behaviors in adolescents and young adults. Therefore, studying the relationship between these variables could be of great importance. Some of the less studied risky behaviors are pathological gambling, and Internet and videogame abuse. This research aims to analyze the existing relationship between such risky behaviors, emotion regulation, and dysfunctional psychological symptomatology (depression, anxiety, phobic anxiety, somatization, obsessive-–compulsive behavior, interpersonal sensitivity, hostility, paranoid ideation, and psychoticism). In addition, it also looks to assess whether emotional regulation plays a mediating role between pathological gambling, and Internet and videogame abuse, and psychological symptomatology. The sample was composed of 1312 young adults and adolescents, aged between 12 and 30, recruited from scholar centers, universities and free time groups, and from associations and centers associated with FEJAR (Spanish Federation of Rehabilitated Gamblers). Participants completed measurements of impulsive behavior, emotion regulation, and dysfunctional symptomatology. Results showed that there is generally a positive and significant relation between these variables. Moreover, it has been pointed out that emotion regulation mediates the association between impulsive behavior and dysfunctional symptomatology among those young adults and adolescents who engage in these impulsive behaviors, except for the relation between videogame abuse and depressive symptomatology. Training in emotional regulation skills could be useful in dealing with and treating this type of behaviors in adolescents and young adults.

  7. Pulling out the Thorns: Art Therapy with Sexually Abused Children and Adolescents.

    Science.gov (United States)

    Pifalo, Terry

    2002-01-01

    Discusses which art therapy interventions were chosen to address the long- and short-term effects of sexual abuse, and provides theoretical and psychological documentation for each choice. Participants were evaluated using the Trauma Symptoms Child Checklist. Results document a reduction in the symptoms commonly associated with childhood sexual…

  8. Utilizing Business, University, and Community Resources to Target Adolescent Prescription Drug Abuse

    Science.gov (United States)

    Wade-Mdivanian, R.; Anderson-Butcher, D.; Hale, K.; Kwiek, N.; Smock, J.; Radigan, D.; Lineberger, J.

    2012-01-01

    "Generation Rx" is a prescription drug abuse prevention strategy which includes a "toolkit" designed to be used with youth. Developed by Cardinal Health Foundation and the Ohio State University, it provides health care providers (especially pharmacists), parents, teachers, youth workers, and other community leaders with interactive tools and…

  9. Remote Shutoff Stops Runaway Lawnmower

    Science.gov (United States)

    Grambo, Alan A.

    2007-01-01

    In this article, the author describes how electronics students at Central Nine Career Center designed a kill switch circuit to stop a runaway lawnmower. This project is ideal for a career center since the electronics/robotics, small engines and horticulture classes can all work together on their respective parts of the modification, installation…

  10. The relationship between child maltreatment and substance abuse treatment outcomes among emerging adults and adolescents.

    Science.gov (United States)

    Garner, Bryan R; Hunter, Brooke D; Smith, Douglas C; Smith, Jane Ellen; Godley, Mark D

    2014-01-01

    Emerging adulthood is the period of greatest risk for problematic substance use. The primary aim of the current study was to examine the relationship between a broad measure of child maltreatment and several key outcomes for a large clinical sample of emerging adults (n = 858) and adolescents (n = 2,697). The secondary aim was to examine the extent to which the relationship between child maltreatment and treatment outcomes differed between emerging adults and adolescents. Multilevel latent growth curve analyses revealed emerging adults and adolescents who experienced child maltreatment reported significantly greater reductions over time on several treatment outcomes (e.g., substance use, substance-related problems, and emotional problems). Overall, analyses did not support differential relationships between child maltreatment and changes over time in these substance use disorder treatment outcomes for emerging adults and adolescents. The one exception was that although emerging adults with child maltreatment did reduce their HIV risk over time, their improvements were not as great as were the improvements in HIV risk reported by adolescents who had experienced child maltreatment.

  11. Youth with Disabilities Who Are Runaways and/or Homeless: Responding to the Need.

    Science.gov (United States)

    Fesko, Sheila Lynch; Graham, Steven; Temelini, David

    This document reports on two studies by the Bridges to Inclusion project concerning issues surrounding runaway and/or homeless youth with disabilities. The first study surveyed emergency adolescent shelter providers funded by the Family and Youth Service Bureau. Findings addressed types of disabilities frequently identified or suspected in…

  12. Study on Child Abuse in Children and Adolescents in the Province of Buenos Aires:

    Directory of Open Access Journals (Sweden)

    Cuenya, Lucas

    2011-12-01

    Full Text Available The principal aim of this study was to provide a current description of the child and teenager maltreatment phenomenon in the Buenos Aires Province. The sample was composed by 5341 cases of children and teenagers from 0 to 20 years old, whose were treated in 2010 for having been victims of maltreatment. Physical maltreatment was the most frequent one. The girls presented major proportion of sexual abuse, whereas boys registered major proportions of negligence, physical maltreatment and desertion situation. An increase of the sexual abuse frequency in teenagers from 12 years was observed. As a whole, the information demonstrates that sex and age of victims are differentially associated with different types of maltreatment, and these are pertinent variables to have into account by future investigations, and prevention and protection organisms.

  13. Borderline Personality Symptoms and Human Immunodeficiency Virus Risk in Alcohol and Other Drug Abusing Adolescent Offenders

    Directory of Open Access Journals (Sweden)

    Jessy G. Dévieux

    2009-01-01

    Full Text Available Problem statement: Incarcerated youth with borderline symptomatology represent a particularly at risk-population due to their enggement in risky behaviors. Five hundred twenty two adolescents were assessed for borderline symptomatology (MACI, engagement in risky behaviors and attitudes/knowledge. Approach:Adolescents were divided into two groups: low borderline (below the 60 scale score cutoff and high borderline (subclinical and clinical range. Multivariate analyses were used to test for group differences. Results: The high borderline group had higher perceived susceptibility, greater knowledge, less favorable sexual and condom attitudes and less favorable behavioral intentions. There were no significant differences by group on sexual risk or substance use behaviors. A subset (n = 156 participating in a risk reduction experimental trial were followed three months post-intervention for differences in sexual risk and substance use. The high borderline experimental participants reported significantly more anal sex than the low borderline adolescents at 3 month follow-up. High borderline adolescents in the control group reported greater cocaine use than low borderline controls at 3 months, including trends suggesting more marijuana and alcohol use. At 3 month follow-up, no differences in cocaine, alcohol or marijuana use were detected between high and low borderline adolescents in the experimental group. Adolescents with higher borderline tendencies appear to realistically assess that they are at high risk of contracting HIV but may have less confidence in their ability to adopt HIV preventive behaviors. The results indicate that borderline personality symptoms may represent an important indicator of attitudes conducive to HIV transmission. Conclusion:Three-month follow-up data indicate the importance of examining borderline characteristics more microanalytically within research studies, including

  14. Substance abuse prevalence and its relation to scholastic achievement and sport factors: an analysis among adolescents of the Herzegovina–Neretva Canton in Bosnia and Herzegovina

    Directory of Open Access Journals (Sweden)

    Sekulic Damir

    2012-04-01

    Full Text Available Abstract Background Substance abuse among adolescents is a major public health and social problem. However, studies rarely investigate the relationships between substance abuse, educational achievement and sport factors. Substance abuse is an even more significant problem in societies that have experienced trauma, such as Bosnia and Herzegovina, which have had recent wars. The aims of this study were to investigate substance abuse among adolescents in Bosnia and Herzegovina and to study the potential gender-specific relationships between a sport factors (physical activity/exercise/athletic participation and substance abuse and b scholastic achievement and substance abuse. Methods Our sample consisted of 1,032 adolescents who were 17 to 18 years old (435 boys and 597 girls and who were in the final grade of high school. These subjects were randomly selected from the territory of Herzegovina-Neretva Canton of Bosnia and Herzegovina. Retrospective testing was performed using an extensive self-administered questionnaire. The questionnaire included questions involving topics such as sociodemographic variables, scholastic variables, sport factors, and substance abuse data (smoking habits, drugs consumption and alcohol consumption using the AUDIT questionnaire. Descriptive statistics, frequencies, analyses of the differences and correlational analyses were performed. Results Our results found that greater than one-third of the boys and one-fourth of the girls were daily smokers, and almost half of the boys and one-fifth of the girls practiced harmful drinking; other drugs (i.e. heroin, cocaine, amphetamines, etc. were rarely consumed. Boys dominated in sport factors, whereas girls were more successful in scholastic achievement. Approximately 23% of the boys and 6% of the girls reported that they practiced harmful drinking and smoked simultaneously. Educational failure, which was defined as having one or more negative grades at the end of the last two

  15. Using Mindfulness in the Treatment of Adolescent Sexual Abusers: Contributing Common Factor or a Primary Modality?

    Science.gov (United States)

    Jennings, Jerry L.; Apsche, Jack A.; Blossom, Paige; Bayles, Corliss

    2013-01-01

    Although mindfulness has become a mainstream methodology in mental health treatment, it is a relatively new approach with adolescents, and perhaps especially youth with sexual behavior problems. Nevertheless, clinical experience and several empirical studies are available to show the effectiveness of a systematic mindfulness- based methodology for…

  16. Adolescent Substance-Use Frequency following Self-Help Group Attendance and Outpatient Substance Abuse Treatment

    Science.gov (United States)

    Gangi, Jennifer; Darling, Carol A.

    2012-01-01

    Despite the heterogeneity of posttreatment outcomes, the likelihood of relapse is often dependent on several factors, including participation in continuing care services such as self-help groups. However, few studies have examined the use of self-help groups among adolescent outpatients. Therefore, in this study, investigators examined self-help…

  17. Gendered pathways from child sexual abuse to sexual aggression victimization and perpetration in adolescence and young adulthood.

    Science.gov (United States)

    Krahé, Barbara; Berger, Anja

    2017-01-01

    This study aimed to examine the pathways from child sexual abuse to sexual assault victimization and perpetration in adolescence and early adulthood, considering risky sexual behavior and lowered sexual self-esteem as mediator variables. In a two-wave longitudinal study with 2251 college students in Germany, male and female participants provided reports of sexual aggression victimization and perpetration since age 14 (T1) and again a year later (T2), covering the last 12 months. In addition, child sexual abuse (CSA; before the age of 14), risky sexual behavior, and sexual self-esteem were assessed at T1, and risky sexual behavior and sexual-self-esteem were assessed again at T2. Experience of CSA was significantly associated with greater likelihood of sexual aggression victimization and perpetration, lower sexual self-esteem, and more risky sexual behavior in both gender groups at T1 and was directly related to victimization at T2 among male participants. In both gender groups, CSA indirectly contributed to a higher probability of sexual victimization at T2 via its impact on victimization T1. In males, the indirect path from CSA to T2 perpetration via T1 perpetration was also significant. Through its negative impact on sexual self-esteem, CSA indirectly increased the probability of sexual victimization among women and the probability of sexual aggression perpetration among men. Risky sexual behavior mediated the pathway from CSA to sexual victimization at T2 for men and women and the pathway from CSA to sexual aggression perpetration for women. The findings contribute to the understanding of gendered effects of CSA on revictimization and the victim-to-perpetrator cycle.

  18. Child Sexual Abuse

    Science.gov (United States)

    ... sense of self-esteem, cope with feelings of guilt about the abuse, and begin the process of overcoming the trauma. Such treatment can help reduce the ... Child and Adolescent Psychiatrists Teen Suicide ...

  19. Childhood Sexual Abuse

    Directory of Open Access Journals (Sweden)

    Evrim Aktepe

    2009-08-01

    Full Text Available Sexual abuse is defined as use of child or adolescent by the adults for satisfying of sexual urges and needs with forcing, threatening or tricking. Sexual abuse can be in the form of sexual abuse without touch, sexual touch, interfemoral intercourse, sexual penetration, and sexual exploitation. The prevalence of sexual abuse is reported as 10-40%. It is seen in female four times more than in males. Abusers are frequently male, only 5-15% of them are female. The abuse by females is usually towards male child. Thirty-fifty percent of abuse cases among child and adolescent are outside the family including strangers or familiar person. Some features of abusers are introvert personality, pedophilic and antisocial personality. Most of the abusers have a history of sexual abuse or aggression during childhood. Sexual intercourse between two people who are not allowed to marry by law is called as incest. Family pattern of incest is defined globally as disorganized and dysfunctional. The most commonly reported familial pattern is rigid and patriarchal family pattern with a harsh father using force quite frequently. The clinical features and impacts of the sexual abuse on the child varies according to the relation between abusers and the child, form of abuse, duration of abuse, presence of physical assault, developmental phase, child age and psychological development before the abuse. Sexual abuse history may result in psychiatric disorders including anxiety, depression, substance dependence, suicide act, borderline personality disorder, posttraumatic stress disorder. Abuse negatively affects interpersonal relationships and self esteem of abused individuals. Several studies reported close association between risky sexual behaviors in adulthood and a history of of sexual abuse during childhood. Four traumatic dynamics including traumatic sexuality with abuse, feeling of betrayal, weakness, and stigmatization exist in childhood abuse. Trauma can cause

  20. Losses of runaway electrons during ergodization

    Science.gov (United States)

    Finken, K. H.; Abdullaev, S. S.; Jakubowski, M.; Jaspers, R.; Lehnen, M.; Zimmermann, O.

    2006-04-01

    The dynamic ergodic divertor (DED) of TEXTOR has been applied to runaway discharges. The runaway electrons (ɛ < 30 MeV) are developed as probes for investigating the internal magnetic field line structure in the plasma. Complementary diagnostics are used, namely neutron measurements for the loss of the runaways and synchrotron radiation for the detection inside the plasma. During the DED phase, three features of the runaway electrons are found: a sudden loss from the just formed ergodic layer, an enhanced diffusive transport and very sudden loss events which may be related to field line reconnection processes.

  1. Relativistic runaway electrons in tokamak plasmas

    Energy Technology Data Exchange (ETDEWEB)

    Jaspers, R.E.

    1995-02-03

    Runaway electrons are inherently present in a tokamak, in which an electric field is applied to drive a toroidal current. The experimental work is performed in the tokamak TEXTOR. Here runaway electrons can acquire energies of up to 30 MeV. The runaway electrons are studied by measuring their synchrotron radiation, which is emitted in the infrared wavelength range. The studies presented are unique in the sense that they are the first ones in tokamak research to employ this radiation. Hitherto, studies of runaway electrons revealed information about their loss in the edge of the discharge. The behaviour of confined runaways was still a terra incognita. The measurement of the synchrotron radiation allows a direct observation of the behaviour of runaway electrons in the hot core of the plasma. Information on the energy, the number and the momentum distribution of the runaway electrons is obtained. The production rate of the runaway electrons, their transport and the runaway interaction with plasma waves are studied. (orig./HP).

  2. Is there an association between adolescent bullying victimization and substance abuse?

    Science.gov (United States)

    Ringwalt, Chris; Shamblen, Steven

    2012-01-01

    Bullying is endemic in the nation's schools and takes a substantial toll on its victims' physical and social-emotional well-being. We assessed the association between specific reasons for which adolescents believe that they are targeted for bullying and their rates of various types of substance use by analyzing the association between self-reported past 30-day substance use and past 30-day bullying victimization among 53,750 middle and high school students in Oregon. Our results confirm previous estimates of prevalence rates for bullying as well as modest (r bullying victimization and substance use. However, study findings did not reveal a particular reason for bullying victimization that would place adolescents at a relatively high risk of substance use.

  3. Desire to dissociate: implications for problematic drinking in college students with childhood or adolescent sexual abuse exposure.

    Science.gov (United States)

    Klanecky, Alicia; McChargue, Dennis E; Bruggeman, Lindsay

    2012-01-01

    Alcohol use to replace inadequate dissociative capabilities, or chemical dissociation, has been linked to college students with childhood or adolescent sexual abuse (CASA). Insofar as CASA-exposed persons experience a restricted range of dissociative capabilities, what remains relatively unclear is whether some desire to achieve greater dissociative experiences. Nonclinical levels of dissociative tendencies have positively predicted alcohol-related blackouts in CASA-exposed students, and dissociation mediated the relations between CASA and intoxication frequency. Although alcohol (similar to dissociation) can reduce physiological and psychological responses to stress, alcohol consumption may be prompted by a desire to dissociate rather than inadequate dissociative tendencies alone. To investigate this interpretation of the chemical dissociation phenomenon, researchers examined the mediating potential of dissociative tendencies using the Dissociative Experiences Scale-II (DES-II) as well as the desire to dissociate concept (ie, a modified version of the DES-II) on the relations between CASA exposure and problematic alcohol use in college students (N = 298). Results indicated that dissociation scores did not replicate previous mediation findings whereas desire to dissociate scores fully mediated CASA exposure and problematic alcohol use. Implications of the results are discussed including possible reasons why prior mediation results were not replicated as well as links to experiential avoidance.

  4. Drug dependence and psychotic symptoms: a retrospective study of adolescents who abuse drugs at Al-Amal Hospital in Jeddah, Saudi Arabia

    Directory of Open Access Journals (Sweden)

    Osama Alibrahim

    2012-03-01

    Full Text Available Drug abuse is reported to be on the increase among young persons using illicit substances but little is known about the frequency with which they occur, the symptoms on presentation to health institutions, and the different substances abused. To establish this, we reviewed patient data collected at Al-Amal Hospital in Jeddah Kingdom of Saudi Arabia on young persons who are refered to the hospital for problems related to drug abuse. Data on 69 adolescent drug users were reviewed and analyzed using the Composite International Diagnostic Interview - Substance Abuse Model (CIDI-SAM to assess dependence on substances including amphetamines, cannabis, cocaine, and opioids. Furthermore, we assessed the adolescents’ data on history of delusions and hallucinations in the context of use of, or withdrawal from, these specific substances. Our analysis shows that 10 to 79.6% of users of amphetamines, cannabis, cocaine, and opiates met DSM-III-R dependence criteria for each specific substance. The prevalence of psychotic symptoms associated with each specific substance ranged from users with no diagnosis to users with severe dependence as follows: amphetamines (3-100%, cannabis (7- 60.0%, cocaine (5-70.7%, and opiates (4- 88%. The risk of psychotic symptoms increased for respondents who abused (OR=7.2 or had mild (OR=8.1, moderate (OR=20.0, or severe dependence (OR=14.0 on cocaine when compared to those who were users with no diagnosis. A similar pattern was evident in cannabis, opiate, and amphetamine users. In conclusion, most adolescent drug users in Saudi Arabia who are dependent on illicit substances experience psychotic symptoms in the context of use of, or withdrawal from, these substances. Psychotic symptoms increased with the severity of the disorders associated with use of all four substances. These findings underscore the importance of developing services to target this population; a population at risk of developing psychotic symptoms.

  5. Families parenting adolescents with substance abuse--recovering the mother's voice: a narrative literature review.

    Science.gov (United States)

    Smith, Jackie M; Estefan, Andrew

    2014-11-01

    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 presents as a problem of dependent individuals, families are also profoundly affected by the family member's addiction. In this narrative literature review, we review published research from 1937 to 2014 to capture a narrative and historical perspective of addiction and family. We condense and analyze the experiences of parents with alcohol- and drug-dependent children, to emphasize the need for a more specific, in-depth exploration of mothers' experiences. Such exploration may advance nurses' understandings of individual, familial, and social complexities of parenting an addicted child.

  6. Understanding adolescent peer sexual harassment and abuse: using the theory of planned behavior.

    Science.gov (United States)

    Li, Man Yu; Frieze, Irene; Tang, Catherine So-kum

    2010-06-01

    This study examines intentions to take protective action against peer sexual harassment and abuse (PSHA). The theory of planned behavior (TPB) proposes that attitudes about protective action, perceptions of what others would think about doing this (subjective norms), and behavioral control would be important predictors. A total of 1,531 Chinese secondary school students (769 boys and 762 girls) from Hong Kong were surveyed to test this model. Results showed that the TPB model was predictive for girls, but only subjective norms and behavioral control significantly predicted boys' intentions to protect themselves. Results supported the influence of subjective norms and perceived behavioral control on youths' intentions to reject PSHA. These factors may be useful in guiding the development of an educational program for prevention of PSHA.

  7. Association between Physical Abuse, Physical Neglect and Health Risk Behaviours among Young Adolescents: Results from the National Study

    Directory of Open Access Journals (Sweden)

    Dimitrinka Jordanova Peshevska

    2014-06-01

    CONCLUSION: The results demonstrated a relationship between physical abuse and later manifestation of health risk behaviours such as: smoking and early pregnancy. Physical neglect increased the chances for drug abuse, drink-driving, having early sex, having more sexual partners.

  8. Individual and community-level socioeconomic position and its association with adolescents experience of childhood sexual abuse: a multilevel analysis of six countries in Sub-Saharan Africa

    Directory of Open Access Journals (Sweden)

    Ismail Yahaya

    2014-01-01

    Full Text Available Abstract: Background: Childhood sexual abuse (CSA is a substantial global health and human rights problem and consequently a growing concern in sub-Saharan Africa. We examined the association between individual and community-level socioeconomic status (SES and the likelihood of reporting CSA. Methods: We applied multiple multilevel logistic regression analysis on Demographic and Health Survey data for 6,351female adolescents between the ages of 15 and 18 years from six countries in sub-Saharan Africa, between 2006 and 2008. Results: About 70% of the reported cases of CSA were between 14 and 17 years. Zambia had the highest proportion of reported cases of CSA (5.8%. At the individual and community level, we found that there was no association between CSA and socioeconomic position. This study provides evidence that the likelihood of reporting CSA cut across all individual SES as well as all community socioeconomic strata. Conclusions: We found no evidence of socioeconomic differentials in adolescents’ experience of CSA, suggesting that adolescents from the six countries studied experienced CSA regardless of their individual- and community-level socioeconomic position. However, we found some evidence of geographical clustering, adolescents in the same community are subject to common contextual influences. Further studies are needed to explore possible effects of countries’ political, social, economic, legal, and cultural impact on childhood sexual abuse.

  9. The structure of the psychological consequences of sexual violence and abuse against children and adolescents

    Directory of Open Access Journals (Sweden)

    Nutskova E.V.

    2016-10-01

    Full Text Available The results of the joint psychiatric-psychological examination of 175 victims of child sexual abuse (CSA are presented. A complex of methods and techniques was used, including semi-structured interview for detection of posttraumatic stress in children, inventories for quality of life and maladjustment assessment, a battery of methods applied in the forensic psychiatric-psychological expertise, statistical methods. In the framework of the clinical and psychological (non-clinical levels psychological consequences of CSA in accordance with the psychic state of victims were revealed. 4 groups of consequences with different intensity are described: psychogenic state in form of disorder (1 and psychogenic state in form of reaction (2 (clinical level; unfavorable psychological state (3 and minimally unfavorable state (4 (psychological level. It was stated that the more severe is the victim’s psychic disturbance, from minimally unfavorable to psychic disorder, the broader is the range of psychological, personality spheres involved the bigger is the number and the intensity of symptoms of posttraumatic reactions. Psychological consequences displayed by mentally healthy victims of CSA indicate, though, their quality of life impairment.

  10. Child abuse and neglect: Relations to adolescent binge drinking in the National Longitudinal Study of Adolescent Health (AddHealth) Study

    OpenAIRE

    Shin, Sunny Hyucksun; Edwards, Erika M.; Heeren, Timothy

    2008-01-01

    The purpose of this study was to examine the relationship between child maltreatment and adolescent binge drinking. Given that many victimized children have been maltreated in multiple ways, we examine the effects of co-occurrence of multiple types of maltreatment on adolescent binge drinking. We used the National Longitudinal Study of Adolescent Health (AddHealth), which included a nationally representative sample of adolescents (n = 12,748). Adolescent binge drinking was defined as five or ...

  11. Runaway Stars in Supernova Remnants

    Science.gov (United States)

    Pannicke, Anna; Neuhaeuser, Ralph; Dinçel, Baha

    2016-07-01

    Half of all stars and in particular 70 % of the massive stars are a part of a multiple system. A possible development for the system after the core collapse supernova (SN) of the more massive component is as follows: The binary is disrupted by the SN. The formed neutron star is ejected by the SN kick whereas the companion star either remains within the system and is gravitationally bounded to the neutron star, or is ejected with a spatial velocity comparable to its former orbital velocity (up to 500 km/s). Such stars with a large peculiar space velocity are called runaway stars. We present our observational results of the supernova remnants (SNRs) G184.6-5.8, G74.0-8.5 and G119.5+10.2. The focus of this project lies on the detection of low mass runaway stars. We analyze the spectra of a number of candidates and discuss their possibility of being the former companions of the SN progenitor stars. The spectra were obtained with INT in Tenerife, Calar Alto Astronomical Observatory and the University Observatory Jena. Also we investigate the field stars in the neighborhood of the SNRs G74.0-8.5 and G119.5+10.2 and calculate more precise distances for these SNRs.

  12. Lifetime Pattern of Substance Abuse, Parental Support, Religiosity, and Locus of Control in Adolescent and Young Male Users

    Directory of Open Access Journals (Sweden)

    A Farhadinasab

    2008-12-01

    Full Text Available "nBackground: In the current study, pattern of substance abuse among adolescence and early adulthood that have experienced one or more substances was assessed, and also parental support, religiosity, and locus of control were measured."nMethods: This cross-sectional study was conducted in Hamadan City, Iran in 2006. All subjects were selected from Hama­dan City (urban area, Iran based on snowball sampling method. Participants were males who used alcohol and illicit drugs in their life (n=398, completed a self-administered questionnaire."nResults: Approximately half of the participants were used to smoke, drink, take marijuana and/or use opium regularly, and one in ten had taken ecstasy or heroine in the last weeks. Tobacco and alcohols were most common substance as a gateway and consequently marijuana and opium were the next substances. Initiation age result for using substance was ages 13 to 18 years. More than 90% classified as group who suffering familial support, 60.8% as low level of religiosity, and 51.5% of partici­pants was external locus of control."nConclusion: Our findings were similar to western countries pattern except that for opium. The high rate substances use by adoles­cents and changes in pattern of use suggests that all drug use need to be taken into account when addressing adoles­cents' substance use. Moreover, research is needed to identify possible mechanisms underlying the association between binge drug uses in the vulnerable groups.

  13. Enigma of Runaway Stars Solved

    Science.gov (United States)

    1997-01-01

    Supernova Propels Companion Star through Interstellar Space The following success story is a classical illustration of scientific progress through concerted interplay of observation and theory. It concerns a 35-year old mystery which has now been solved by means of exciting observations of a strange double star. An added touch is the successive involvement of astronomers connected to the European Southern Observatory. For many years, astronomers have been puzzled by the fact that, among the thousands of very young, hot and heavy stars which have been observed in the Milky Way, there are some that move with exceptionally high velocities. In some cases, motions well above 100 km/sec, or ten times more than normal for such stars, have been measured. How is this possible? Which mechanism is responsible for the large amounts of energy needed to move such heavy bodies at such high speeds? Could it be that these stars are accelerated during the powerful explosion of a companion star as a supernova? Such a scenario was proposed in 1961 by Adriaan Blaauw [1], but until now, observational proof has been lacking. Now, however, strong supporting evidence for this mechanism has become available from observations obtained at the ESO La Silla observatory. The mysterious runaway stars OB-runaway stars [2] are heavy stars that travel through interstellar space with an anomalously high velocity. They have been known for several decades, but it has always been a problem to explain their high velocities. Although most OB-runaway stars are located at distances of several thousands of lightyears, their high velocity results in a measurable change in position on sky photos taken several years apart. The velocity component in the direction of the Earth can be measured very accurately from a spectrogram. From a combination of such observations, it is possible to measure the space velocity of OB-runaways. Bow shocks reveal runaway stars It has also been found that some OB-runaways display

  14. Adjoint method and runaway electron avalanche

    Science.gov (United States)

    Liu, Chang; Brennan, Dylan P.; Boozer, Allen H.; Bhattacharjee, Amitava

    2017-02-01

    The adjoint method for the study of runaway electron dynamics in momentum space Liu et al (2016 Phys. Plasmas 23 010702) is rederived using the Green’s function method, for both the runaway probability function (RPF) and the expected loss time (ELT). The RPF and ELT obtained using the adjoint method are presented, both with and without the synchrotron radiation reaction force. The adjoint method is then applied to study the runaway electron avalanche. Both the critical electric field and the growth rate for the avalanche are calculated using this fast and novel approach.

  15. Abuse Tolerance Improvements

    Energy Technology Data Exchange (ETDEWEB)

    Orendorff, Christopher J. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Nagasubramanian, Ganesan [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Fenton, Kyle R. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Allcorn, Eric [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2015-10-01

    As lithium-ion battery technologies mature, the size and energy of these systems continues to increase (> 50 kWh for EVs); making safety and reliability of these high energy systems increasingly important. While most material advances for lithium-ion chemistries are directed toward improving cell performance (capacity, energy, cycle life, etc.), there are a variety of materials advancements that can be made to improve lithium-ion battery safety. Issues including energetic thermal runaway, electrolyte decomposition and flammability, anode SEI stability, and cell-level abuse tolerance continue to be critical safety concerns. This report highlights work with our collaborators to develop advanced materials to improve lithium-ion battery safety and abuse tolerance and to perform cell-level characterization of new materials.

  16. HIV Risk Behavior of Runaway Youth in San Francisco: Age of Onset and Relation to Sexual Orientation.

    Science.gov (United States)

    Moon, Martha W.; McFarland, William; Kellogg, Timothy; Baxter, Michael; Katz, Mitchell H.; MacKellar, Duncan; Valleroy, Linda A.

    2000-01-01

    Examined HIV risk behaviors among runaway youth by age at onset and sexual orientation. Adolescents age 12-21 years seeking health care at two clinics completed interviews and blood testing. Gay/lesbian/bisexual youth reported higher levels and earlier onset of sexual and drug-using behavior than heterosexual youth and were at exceptionally high…

  17. Estudo de mecanismos e fatores relacionados com o abuso sexual em crianças e adolescentes do sexo feminino Study of mechanisms and factors related to sexual abuse in female children and adolescents

    Directory of Open Access Journals (Sweden)

    Jefferson Drezett

    2001-10-01

    Full Text Available OBJETIVO: estudar mecanismos e fatores relacionados com o abuso sexual, comparando suas freqüências entre vítimas crianças e adolescentes. MÉTODOS: estudo retrospectivo de 617 vítimas de abuso sexual atendidas entre julho de 1994 e agosto de 1999 pelo Centro de Referência da Saúde da Mulher; 71 crianças (idade OBJECTIVE: to study the frequency of sexual abuse in children and adolescents and its related factors. METHODS: retrospective analysis of 617 cases of sexual abuse, assisted between July 1994 and August 1999 at the Women's Health Reference Center, divided into two groups: 71 children (age or =10 and <20 years. The analyzed variables were: sexual crime; embarrassment; presumption of violence; characteristics and number of abusers; the victim's situation at the moment of the crime; and occurrence of physical traumas. Epi Info 6 software was utilized to gather data, and the results were analyzed by the chi-square test. RESULTS: significant statistic results were found. 90.8% of the adolescents were victims of rape, and 46.5% of the children suffered sexual assault. The presupposed violence (PV was more frequent in the group of children (63.4% and a serious threat in the group of adolescents (63.2%. Innocentia consilli was exclusive PV among 100% of children and 59.5% of adolescents. 84.5% of children were molested by identifiable abusers, most frequently family members. Perpetrators were unknown in 72.3% of the cases of adolescent abuse. 42.3% of sexual abuse of children occurred in their homes, and 28.2% at the abuser's. Adolescents were approached during daily activities (34.8% and on their way to work or school (28.4%. Most patients did not have genital or extragenital trauma. CONCLUSIONS: children suffered sexual assault, perpetrated by a known abuser through presupposed violence in private places. Adolescents were raped by unknown individuals, under serious threat, in nondomestic places.

  18. Determinants of Substance Abuse in a Population of Children and Adolescents Involved with the Child Welfare System

    Science.gov (United States)

    Singh, Veeran-Anne S.; Thornton, Tiffany; Tonmyr, Lil

    2011-01-01

    Substance abuse is an important health issue facing children involved with child welfare, but little is known about the associated factors. The purpose of this study was to build on findings from the "Canadian Incidence Study of Reported Child Abuse and Neglect-2003" and use a national sample of 10-15 year old children to examine the factors…

  19. Exposure to methylphenidate during infancy and adolescence in non-human animals and sensitization to abuse of psychostimulants later in life: a systematic review

    Directory of Open Access Journals (Sweden)

    Juliana Jaboinski

    2015-09-01

    Full Text Available Introduction:Attention deficit hyperactivity disorder (ADHD is a neuropsychiatric pathology that has an important prevalence among young people and is difficult to diagnose. It is usually treated with methylphenidate, a psychostimulant with a mechanism of action similar to that of cocaine. Previous studies show that repeated use of psychostimulants during childhood or adolescence may sensitize subjects, making them more prone to later abuse of psychostimulant drugs such as cocaine and methamphetamine.Objective: To review experimental studies in non-human models (rodents and monkeys treated with methylphenidate during infancy or adolescence and tested for reinforcing effects on psychostimulant drugs in adulthood.Method: Systematic collection of data was performed on four databases (Web of Knowledge, PsycARTICLE, PubMed and SciELO. The initial search identified 202 articles published from 2009 to 2014, which were screened for eligibility. Seven articles met the inclusion criteria and were reviewed in this study.Results: The findings indicate that early exposure to methylphenidate has an effect on an ADHD animal model, specifically, on spontaneously hypertensive strain rats, especially those tested using the self-administration paradigm.Conclusion:Future studies should prioritize the spontaneously hypertensive rat strain - an animal model of ADHD. Experimental designs comparing different behavioral paradigms and modes of administration using this strain could lead to improved understanding of the effects of exposure to methylphenidate during childhood and adolescence.

  20. Runaway electron generation and control

    Science.gov (United States)

    Esposito, B.; Boncagni, L.; Buratti, P.; Carnevale, D.; Causa, F.; Gospodarczyk Martin-Solis, M., Jr.; Popovic, Z.; Agostini, M.; Apruzzese, G.; Bin, W.; Cianfarani, C.; De Angelis, R.; Granucci, G.; Grosso, A.; Maddaluno, G.; Marocco, D.; Piergotti, V.; Pensa, A.; Podda, S.; Pucella, G.; Ramogida, G.; Rocchi, G.; Riva, M.; Sibio, A.; Sozzi, C.; Tilia, B.; Tudisco, O.; Valisa, M.; FTU Team

    2017-01-01

    We present an overview of FTU experiments on runaway electron (RE) generation and control carried out through a comprehensive set of real-time (RT) diagnostics/control systems and newly installed RE diagnostics. An RE imaging spectrometer system detects visible and infrared synchrotron radiation. A Cherenkov probe measures RE escaping the plasma. A gamma camera provides hard x-ray radial profiles from RE bremsstrahlung interactions in the plasma. Experiments on the onset and suppression of RE show that the threshold electric field for RE generation is larger than that expected according to a purely collisional theory, but consistent with an increase due to synchrotron radiation losses. This might imply a lower density to be targeted with massive gas injection for RE suppression in ITER. Experiments on active control of disruption-generated RE have been performed through feedback on poloidal coils by implementing an RT boundary-reconstruction algorithm evaluated on magnetic moments. The results indicate that the slow plasma current ramp-down and the simultaneous reduction of the reference plasma external radius are beneficial in dissipating the RE beam energy and population, leading to reduced RE interactions with plasma facing components. RE active control is therefore suggested as a possible alternative or complementary technique to massive gas injection.

  1. Disorganized Behavior in Adolescent-Parent Interaction: Relations to Attachment State of Mind, Partner Abuse, and Psychopathology

    Science.gov (United States)

    Obsuth, Ingrid; Hennighausen, Katherine; Brumariu, Laura E.; Lyons-Ruth, Karlen

    2014-01-01

    Disoriented, punitive, and caregiving/role-confused attachment behaviors are associated with psychopathology in childhood, but have not been assessed in adolescence. A total of 120 low-income late adolescents (aged 18-23 years) and parents were assessed in a conflict-resolution paradigm. Their interactions were coded with the Goal-Corrected…

  2. Can Cell to Cell Thermal Runaway Propagation be Prevented in a Li-ion Battery Module?

    Science.gov (United States)

    Jeevarajan, Judith; Lopez, Carlos; Orieukwu, Josephat

    2014-01-01

    Increasing cell spacing decreased adjacent cell damage center dotElectrically connected adjacent cells drained more than physically adjacent cells center dotRadiant barrier prevents propagation when fully installed between BP cells center dotBP cells vent rapidly and expel contents at 100% SOC -Slower vent with flame/smoke at 50% -Thermal runaway event typically occurs at 160 degC center dotLG cells vent but do not expel contents -Thermal runaway event typically occurs at 200 degC center dotSKC LFP modules did not propagate; fuses on negative terminal of cell may provide a benefit in reducing cell to cell damage propagation. New requirement in NASA-Battery Safety Requirements document: JSC 20793 Rev C 5.1.5.1 Requirements - Thermal Runaway Propagation a. For battery designs greater than a 80-Wh energy employing high specific energy cells (greater than 80 watt-hours/kg, for example, lithium-ion chemistries) with catastrophic failure modes, the battery shall be evaluated to ascertain the severity of a worst-case single-cell thermal runaway event and the propensity of the design to demonstrate cell-to-cell propagation in the intended application and environment. NASA has traditionally addressed the threat of thermal runaway incidents in its battery deployments through comprehensive prevention protocols. This prevention-centered approach has included extensive screening for manufacturing defects, as well as robust battery management controls that prevent abuse-induced runaway even in the face of multiple system failures. This focused strategy has made the likelihood of occurrence of such an event highly improbable. b. The evaluation shall include all necessary analysis and test to quantify the severity (consequence) of the event in the intended application and environment as well as to identify design modifications to the battery or the system that could appreciably reduce that severity. In addition to prevention protocols, programs developing battery designs with

  3. Runaway electrons and magnetic island confinement

    Science.gov (United States)

    Boozer, Allen H.

    2016-08-01

    The breakup of magnetic surfaces is a central feature of ITER planning for the avoidance of damage due to runaway electrons. Rapid thermal quenches, which lead to large accelerating voltages, are thought to be due to magnetic surface breakup. Impurity injection to avoid and to mitigate both halo and runaway electron currents utilizes massive gas injection or shattered pellets. The actual deposition is away from the plasma center, and the breakup of magnetic surfaces is thought to spread the effects of the impurities across the plasma cross section. The breakup of magnetic surfaces would prevent runaway electrons from reaching relativistic energies were it not for the persistence of non-intercepting flux tubes. These are tubes of magnetic field lines that do not intercept the walls. In simulations and in magnetic field models, non-intercepting flux tubes are found to persist near the magnetic axis and in the cores of magnetic islands even when a large scale magnetic surface breakup occurs. As long as a few magnetic surfaces reform before all of the non-intercepting flux tubes dissipate, energetic electrons confined and accelerated in these flux tubes can serve as the seed electrons for a transfer of the overall plasma current from thermal to relativistic carriers. The acceleration of electrons is particularly strong because of the sudden changes in the poloidal flux that naturally occur in a rapid magnetic relaxation. The physics of magnetic islands as non-intercepting flux tubes is studied. Expressions are derived for (1) the size of islands required to confine energetic runaway electrons, (2) the accelerating electric field in an island, (3) the increase or reduction in the size of an island by the runaway electron current, (4) the approximate magnitude of the runaway current in an island, and (5) the time scale for the evolution of an island.

  4. [Improving Access to Evidence Based Interventions for Children and Adolescents with Mental Disorders After Child Abuse and Neglect].

    Science.gov (United States)

    Ganser, Helene G; Münzer, Annika; Seitz, Diana C M; Witt, Andreas; Goldbeck, Lutz

    2015-01-01

    Victims of child abuse and neglect are more likely to develop emotional and behavioral problems than their non-abused peers. In many cases they do not receive evidence based treatments. Based on pilot studies and clinical experience, a structured and manualized case-management protocol was developed to provide child welfare professionals guidance, direction and support in helping these families find and engage in appropriate treatment. The protocol is described. A survey among child welfare workers indicates a lack of knowledge about mental disorders in victims of child abuse as well as an insufficient cooperation between the child welfare and the mental healthcare system. Child welfare workers who have applied the manual evaluate it positively. This study shows that the structured case-management can be implemented in a child welfare setting.

  5. Abuse behavior of high-power, lithium-ion cells

    Science.gov (United States)

    Spotnitz, R.; Franklin, J.

    Published accounts of abuse testing of lithium-ion cells and components are summarized, including modeling work. From this summary, a set of exothermic reactions is selected with corresponding estimates of heats of reaction. Using this set of reactions, along with estimated kinetic parameters and designs for high-rate batteries, models for the abuse behavior (oven, short-circuit, overcharge, nail, crush) are developed. Finally, the models are used to determine that fluorinated binder plays a relatively unimportant role in thermal runaway.

  6. Differential Influences of Parenting Dimensions and Parental Physical Abuse during Childhood on Overweight and Obesity in Adolescents

    OpenAIRE

    Thomas Mößle; Sören Kliem; Anna Lohmann; Marie Christine Bergmann; Dirk Baier

    2017-01-01

    Besides other explanatory variables, parenting styles and parental violence might also be responsible for setting a path towards overweight/obesity in childhood. While this association has consistently been observed for adults, findings for adolescents still remain scarce and inconsistent. Therefore, the goal of this study is to add evidence on this topic for children and adolescents. Analyses are based on a sample of 1729 German, ninth-grade students. To analyze associations between parentin...

  7. Attention Problems Mediate the Association between Severity of Physical Abuse and Aggressive Behavior in a Sample of Maltreated Early Adolescents

    Science.gov (United States)

    Garrido, Edward F.; Taussig, Heather N.; Culhane, Sara E.; Raviv, Tali

    2011-01-01

    Empirical evidence has accumulated documenting an association between childhood physical abuse and aggressive behavior. Relatively fewer studies have explored possible mediating mechanisms that may explain this association. The purpose of the current study was to examine whether caregiver- and youth-reported attention problems mediate the…

  8. Runaway breakdown and electrical discharges in thunderstorms

    Science.gov (United States)

    Milikh, Gennady; Roussel-Dupré, Robert

    2010-12-01

    This review considers the precise role played by runaway breakdown (RB) in the initiation and development of lightning discharges. RB remains a fundamental research topic under intense investigation. The question of how lightning is initiated and subsequently evolves in the thunderstorm environment rests in part on a fundamental understanding of RB and cosmic rays and the potential coupling to thermal runaway (as a seed to RB) and conventional breakdown (as a source of thermal runaways). In this paper, we describe the basic mechanism of RB and the conditions required to initiate an observable avalanche. Feedback processes that fundamentally enhance RB are discussed, as are both conventional breakdown and thermal runaway. Observations that provide clear evidence for the presence of energetic particles in thunderstorms/lightning include γ-ray and X-ray flux intensifications over thunderstorms, γ-ray and X-ray bursts in conjunction with stepped leaders, terrestrial γ-ray flashes, and neutron production by lightning. Intense radio impulses termed narrow bipolar pulses (or NBPs) provide indirect evidence for RB particularly when measured in association with cosmic ray showers. Our present understanding of these phenomena and their enduring enigmatic character are touched upon briefly.

  9. Parametric sensitivity and runaway in tubular reactors

    Energy Technology Data Exchange (ETDEWEB)

    Morbidelli, M.; Varma, A.

    1982-09-01

    Parametric sensitivity of tubular reactors is analyzed to provide critical values of the heat of reaction and heat transfer parameters defining runaway and stable operations for all positive-order exothermic reactions with finite activation energies, and for all reactor inlet temperatures. Evaluation of the critical values does not involve any trial and error.

  10. Maltrato infantil y del adolescente registrado en un hospital de referencia nacional, 2006 - 2011 Child and adolescent abuse recorded at a national referral hospital, 2006 - 2011

    Directory of Open Access Journals (Sweden)

    Lorena Escalante-Romero

    2012-03-01

    Full Text Available Objetivos. Realizar una descripción de los registros del Instituto Nacional de Salud del Niño (INSN, desde enero de 2006 hasta septiembre de 2011, sobre maltrato infantil y del adolescente, lo cual permite la caracterización del agredido y del agresor. Materiales y métodos. Se realizó un análisis de fuentes secundarias, basado en registros de la "Ficha de evaluación de violencia familiar y maltrato infantil", aplicada por el Módulo de Atención al Maltrato Infantil y del Adolescente en Salud (MAMIS del INSN. La ficha incluye datos del agredido, del agresor y las características de la agresión. Se diferenció el tipo de agresión como: sexual, física, psicológica o por abandono. Se muestran los resultados en frecuencias y porcentajes. Resultados. Se incluyeron 1798 registros. El 63,9% eran niñas y el 39,9% fueron adolescentes. El 60,6% de los agresores fueron varones y el 65,8% de las agresiones ocurrieron en casa. El 48,6% fueron registros de agresión sexual, que fue más frecuente en niñas (73,2% y adolescentes (44,4%; en el 9,6% de los casos existió coito. Conclusiones. En los registros del MAMIS del INSN, la agresión en niñas fue la más frecuente; el agresor con frecuencia era un varón y la mayoría de las agresiones ocurrieron en el domicilio del menor. La agresión sexual fue casi la mitad de la serie.Objectives. To describe the records of child and adolescent abuse of the Instituto Nacional de Salud del Niño (INSN from January 2006 to September 2011, characterizing the victim and perpetrator. Materials and methods. A secondary sources analysis was performed, based on the domestic violence and child abuse records, from froms administered by Child Abuse and Adolescent Health Unit (MAMIS at the INSN. The records include data of the victim, offender and characteristics of the aggression. Types of aggression were categorized as: sexual, physical, psychological or neglection. Frequencies and percentages are presented

  11. The relentless past: The effect of chronic sexual abuse in childhood on fifty years of adolescent and adult development.

    Science.gov (United States)

    Colarusso, Calvin A

    2009-01-01

    Four sisters, now in their late fifties and early sixties, were sexually abused during childhood over a four-year span by the same priest. Until recently they told no one about their experience and never received any psychological diagnostic evaluations or treatment. The author conducted detailed psychiatric evaluations of each of the four women while serving as the plaintiffs' expert witness during their lawsuits against the Catholic Church. The suits have been settled, and the women have given written permission to tell their stories. This unique clinical material provides a rare opportunity to describe and understand the ongoing, pervasive effects of untreated, chronic childhood sexual abuse on developmental processes over half a century. In each instance the women were describing the details of the abuse and the effects on their development for the first time. The severity of the pathology and the intense shame and anxiety associated with discussing their experiences after so many years raises questions about the choice of treatment and technique, particularly in regard to transference and countertransference issues.

  12. Student Reviews of Selected Current Articles in Adolescent Psychology: Academics, Developmental Issues, Psychopathology, Sexual Behavior, Substance Abuse, and Suicide.

    Science.gov (United States)

    Gillis, H. Lee, Ed.; Sirmans, Amanda, Ed.

    Critical annotations of articles written in 1988 or 1989 and selected from "PSYCHSCAN: Clinical Psychology" are presented in this document. The annotations were written by college students in an undergraduate adolescent psychology class. The annotations are clustered under the following topics: (1) academics, including learning disabilities, sleep…

  13. Antisocial Behavior and Psychoactive Substance Involvement among Hispanic and Non-Hispanic Caucasian Adolescents in Substance Abuse Treatment.

    Science.gov (United States)

    Stewart, David G.; Brown, Sandra A.; Myers, Mark G.

    1997-01-01

    Compared conduct disorder behaviors and substance involvement of Hispanic (n=34) and non-Hispanic Caucasian (n=34) adolescents so as to determine pre-treatment problem behavior. Results indicate that non-Hispanic Caucasian youth were three times as likely to be diagnosed with conduct disorder prior to substance involvement than were their Hispanic…

  14. Determining the scale of designer drugs (DD) abuse and risk to public health in Poland through an epidemiological study in adolescents.

    Science.gov (United States)

    Biliński, Przemysław; Kapka-Skrzypczak, Lucyna; Jabłoński, Piotr

    2012-01-01

    Since 2008, it has been recognised by most health authorities worldwide that the abuse of newly-emerging psychoactive drugs, ('designer drugs'/'legal highs'; DD), in youth is a rapidly increasing problem, especially in the EU, threatening to offset gains made in tackling established and illegal drugs which they are intended to mimic; DD diversity is continually increasing to circumvent laws. The aim of the study was to determine the scale of DD abuse/availability amongst Polish youth. The surveyed test population was randomly selected from a representative group of adolescents attending high schools, secondary schools and universities throughout Poland. Questionnaires were completed by 14,511 subjects (10,083 school pupils and 4,428 students). Few persons from each group admitted using DDs; 453 school pupils (4.49%) vs. 81 students (1.83%). More males (4.74%) took DDs than females (2.77%). The tendency to take DDs in the company of friends was high in both DD-taking groups (>80%). DDs were consumed mostly in open spaces (34.15%), discos/pubs (21.13%) and boarding school/friend's house (20.57). Most frequently, DDs came from shops (57.68%), friends (31.46%) or dealers (10.11%). Ensuing symptoms included; happy/euphoric mood (58.80%), talkativeness (42.51%) and hallucinations (22.85%). Over 74% of DD-takers in both groups experienced adverse reactions, and those requiring help sought it from: friends/colleagues (6.74%), doctors (5.06%), and hospitals (4.87%), but most rarely from parents/guardians (2.62%). Urgent action is being taken, especially in youth education, to prevent DDs becoming the serious menace seen with conventional drugs.

  15. On the Production of Relativistic Runaway Electrons in Damavand Tokamak

    Science.gov (United States)

    Moslehi-Fard, Mahmoud

    2013-02-01

    Experimental observations in Damavand tokamak show that hard X-ray is produced by either disruption with I p 20 kA. Hard X-ray also persists from the initiation of plasma discharge to the end. Occurrence of multiple spikes in hard X-ray during the discharge is evident. The propagation of hard X-ray is attributed to runaway electrons. We observe runaway electrons in two regimes with different characteristics. Regime (RADI) is similar to the observations of other Tokamak during disruption on that the plasma current is reduced abruptly and interpreted by Dreicer theory. In the regime of RADII, hard X-ray and subsequently runaway electrons are observed from starting of plasma discharge which provides the condition that the most of runaway electrons contain the toroidal plasma current. Runaway electron beam excites whistler waves and scattered electrons in velocity space and prevent growing the runaway electrons beam.

  16. Adjoint Fokker-Planck equation and runaway electron dynamics

    CERN Document Server

    Liu, Chang; Boozer, Allen H; Bhattacharjee, Amitava

    2016-01-01

    A new method to obtain the runaway probability and the expected slowing-down time for runaway electrons is developed, by solving the adjoint Fokker-Planck equation in momentum space. The runaway probability function has a smooth transition at the runaway separatrix, which can be attributed to the effect of the pitch angle scattering term in the kinetic equation. The expected slowing-down time gives a new way to estimate the runaway current decay time in experiments. The result shows that the decay rate of high energy electron is very slow when E is close to the critical electric field, which helps elucidate the hysteresis effect seen in the runaway electron population. Given the same numerical accuracy, the new method is more efficient than the Monte Carlo simulation.

  17. Numerical calculation of ion runaway distributions

    CERN Document Server

    Embréus, Ola; Stahl, Adam; Hirvijoki, Eero; Fülöp, Tünde

    2015-01-01

    Ions accelerated by electric fields (so-called runaway ions) in plasmas may explain observations in solar flares and fusion experiments, however limitations of previous analytic work have prevented definite conclusions. In this work we describe a numerical solver of the 2D non-relativistic linearized Fokker-Planck equation for ions. It solves the initial value problem in velocity space with a spectral-Eulerian discretization scheme, allowing arbitrary plasma composition and time-varying electric fields and background plasma parameters. The numerical ion distribution function is then used to consider the conditions for runaway ion acceleration in solar flares and tokamak plasmas. Typical time scales and electric fields required for ion acceleration are determined for various plasma compositions, ion species and temperatures, and the potential for excitation of toroidal Alfv\\'en eigenmodes during tokamak disruptions is considered.

  18. Sense of Belonging in School as a Protective Factor Against Drug Abuse Among Native American Urban Adolescents.

    Science.gov (United States)

    Napoli, Maria; Marsiglia, Flavio Francisco; Kulis, Stephen

    2003-03-01

    This article presents the results of a study conducted with 243 Native American students who were part of a multi-ethnic sample of adolescents attending middle school in a large urban center in the Southwest region of the United States. Native adolescents who felt a stronger sense of belonging in their school were found to report a lower lifetime use of alcohol and cigarettes, lower cigarette and marijuana use in the previous month, lower frequency of current use of these substances, fewer substances ever used, and a later age of initiation into drug use than other Native students. Research implications are discussed in relationship to school environment, culturally-grounded prevention curricula, and school social work practice.

  19. Effects of Storytelling-Based Education in the Prevention of Drug Abuse among Adolescents in Iran Based on a Readiness to Addiction Index

    Science.gov (United States)

    Moghadam, Mahdieh Poodineh; Sari, Mahdieh; Balouchi, Abbas; Moghadam, Khadijeh

    2016-01-01

    Introduction One of the most effective strategies in the prevention of addiction is increasing awareness among young people, towards the tendency for taking drugs their physical, mental and social side effects. Storytelling is effective for increasing characteristics of happiness and resilience. This study uses storytelling, a common and popular method to increase awareness among adolescents. Aim To examine the effect of storytelling-based education on the prevention of drug abuse, based on a readiness to addiction index. Materials and Methods This quasi-experimental study was conducted on 136 high school students (grade one), selected by a cluster sampling procedure from May 2014 to February 2015 in Zabol, Iran. The instrument for gathering data was a readiness to addiction questionnaire. This questionnaire included 41 items for which the scoring of each item followed the Likerts format. The data gathered was analysed using SPSS version 21 with descriptive statistics and inferential statistics. Results The results revealed that the mean of the readiness to addiction index in the case group fell from 75.66±19.99 to 69.57±21.83 (paired t-test; p =0.02); in the control group the same index changed from 103.01±21.88 to 93.98±27.70 (paired t-test, p = 0.775). That is, the index decreased for both groups, but the reduction was statistically significant only for the case group (p =0.02). Conclusion This suggests that the narrative method is effective in reducing adolescents readiness to addiction. Storytelling is an effective way to raise awareness among young people about addiction and its detrimental impacts on health. Therefore, such a technique can be taken into consideration in teaching principles of prevention. PMID:28050403

  20. Avalanche Phenomenon of Runaway Electrons During Additional Fuelling

    Institute of Scientific and Technical Information of China (English)

    杨进蔚; 曹建勇; 曾庆希; 张炜; 唐年益; 董贾福; 邓中朝; 肖正贵; 姚良骅

    2002-01-01

    During pellet injection and supersonic molecular beam injection, we have observed the increase of electron density and the enhancement of hard x-ray radiation, but the runaway electrons normally decrease without additional fuelling when the density of plasma increases. This phenomenon may come from the synergetic effects of Dreicer and avalanche runaway electrons. The experimental results are consistent with the calculation based on the theory of avalanche runaway in the HL-1M tokamak.

  1. On Runaway Transport under Magnetic Turbulence in Tokamaks

    Energy Technology Data Exchange (ETDEWEB)

    Castejon, F.; Equilior, S.; Rodriguez-Rodrigo, L. [CIEMAT. Madrid (Spain)

    2001-07-01

    The influence of magnetic turbulence on runaway transport has been studied. The evolution of runaway distribution function has been calculated using Electra a 2D code in momentum space and 1D in radius coordinate. The code considers the effect of averaging the turbulence by runaway orbits. Then Hard X-Ray emission spectrum is estimated and compared with experimental results of TJ-1 tokamak, obtaining a remarkable agreement. (Author) 15 refs.

  2. Generation of runaway electrons during the thermal quench in tokamaks

    Science.gov (United States)

    Aleynikov, Pavel; Breizman, Boris N.

    2017-04-01

    This work provides a systematic description of electron kinetics during impurity dominated thermal quenches. A Fokker–Planck equation for the hot electrons and a power balance equation for the bulk plasma are solved self-consistently, with impurity radiation as the dominant energy loss mechanism. We find that runaway production is facilitated by heavy injection of impurities up to prompt conversion of the total current into a sub-MeV runaway current. We also find that runaway formation is less efficient in plasmas with high pre-quench temperatures and predict significant radial variation of the runaway seed in such plasmas.

  3. Observation of relativistic runaway electrons by synchrotron radiation in TEXTOR

    Energy Technology Data Exchange (ETDEWEB)

    Jaspers, R.; Lopes Cardozo, N.J.; Schueller, F.C. (FOM-Instituut voor Plasmafysica, Rijnhuizen (Netherlands)); Finken, K.H.; Mank, G.; Rusbueldt, D.; Hoenen, F. (Forschungszentrum Juelich GmbH (Germany). Inst. fuer Plasmaphysik); Boedo, J. (California Univ., Los Angeles, CA (United States). Inst. of Plasma and Fusion Research)

    1992-01-01

    Runaway electrons are a promising tool to study magnetic turbulence in tokamak plasma. Recently, several studies have been devoted to this issue. In these studies hard X-rays, created when runaways hit the limiter, have been analysed. This paper also addresses the question of confinement of runaways. Here, however, not the runaways leaving the plasma are studied, but the runaways in the interior. They were diagnosed by means of the infrared synchrotron radiation which relativistic runaways (> 10 MeV) emit, as shown by Finken et al. With this tool information can be obtained about runaway - confinement times, energy, birth-rate, dimensions of the runaway beam and perhaps about their energy distribution. In this paper, at first a presentation of the measurements is given and the energy and pitch angle is deduced from the data. Then a comparison of the runaway confinement in low density plasmas (n[sub e](0) < 0.8 10[sup 19] m[sup -3]) is made for three different conditions; normal ohmic discharge, discharge with a gas puff and one with neutral beam injection (NBI). (author) 7 refs., 4 figs.

  4. 青少年抑郁与儿童期虐待和近期生活事件相关分析%Correlative analysis between depression and childhood abuse or recent life events among adolescents

    Institute of Scientific and Technical Information of China (English)

    杨林胜; 张志华; 吴红燕; 孙业桓

    2011-01-01

    目的 了解青少年抑郁与儿童期虐待和近期生活事件的关系,验证可能存在的调节中介效应假设.方法 方便抽取合肥市3798名使用网络的中学生,进行亲子冲突策略量表、青少年生活事件量表、流调中心用抑郁量表以及人口学特征调查.采用层级线性回归模型,分析青少年儿童期虐待、近期生活事件和抑郁可能存在的调节中介效应.结果 不同性别青少年早期虐待经历与近期生活事件均有关联(P值均<0.01),并通过近期生活事件间接地对青少年抑郁产生效应(P值均<0.01);中学女生儿童期虐待对生活事件介导的间接效应有调节作用(P=0.001),而男生未见儿童期虐待对中介效应的调节作用(P=0.260).结论 儿童期虐待对青少年抑郁的作用部分是通过近期生活事件介导的间接效应,中学女生儿童期虐待对间接效应有正向调节作用.应该采用措施阻止儿童期虐待的出现,其中受虐女童是重点保护的对象.%Objective To examine how childhood abuse and recent life events interact to adolescent depression and to test possible moderated mediation hypothesis. Methods A total of 3 798 urban adolescent students in Hefei were administered to complete the questionnaires including Parent-Child Conflict Tactics Scales, Adolescent Self-Rating Life Events Check List, Beck Depression Inventory and demographic characteristics, respectively. Hierarchical linear regressions were used to evaluate the possible moderated mediation effect in associations linking childhood abuse and pastyear life events to depression in the youth. Results Childhood abuse was associated with past-year life events ( P < 0.01 ) and indirect effects of childhood abuse on depression in the youth mediated by past-year life events were found in both male and female students( P <0.01 ). In addition,the indirect effect above was also moderated by childhood abuse in female students ( P = 0. 001 ), while not in

  5. A backward Monte Carlo method for efficient computation of runaway probabilities in runaway electron simulation

    Science.gov (United States)

    Zhang, Guannan; Del-Castillo-Negrete, Diego

    2016-10-01

    Kinetic descriptions of RE are usually based on the bounced-averaged Fokker-Planck model that determines the PDFs of RE in the 2 dimensional momentum space. Despite of the simplification involved, the Fokker-Planck equation can rarely be solved analytically and direct numerical approaches (e.g., continuum and particle-based Monte Carlo (MC)) can be time consuming specially in the computation of asymptotic-type observable including the runaway probability, the slowing-down and runaway mean times, and the energy limit probability. Here we present a novel backward MC approach to these problems based on backward stochastic differential equations (BSDEs). The BSDE model can simultaneously describe the PDF of RE and the runaway probabilities by means of the well-known Feynman-Kac theory. The key ingredient of the backward MC algorithm is to place all the particles in a runaway state and simulate them backward from the terminal time to the initial time. As such, our approach can provide much faster convergence than the brute-force MC methods, which can significantly reduce the number of particles required to achieve a prescribed accuracy. Moreover, our algorithm can be parallelized as easy as the direct MC code, which paves the way for conducting large-scale RE simulation. This work is supported by DOE FES and ASCR under the Contract Numbers ERKJ320 and ERAT377.

  6. Runaway electron drift orbits in magnetostatic perturbed fields

    Science.gov (United States)

    Papp, G.; Drevlak, M.; Fülöp, T.; Helander, P.

    2011-04-01

    Disruptions in large tokamaks can lead to the generation of a relativistic runaway electron beam that may cause serious damage to the first wall. To mitigate the disruption and suppress the runaway beam the application of resonant magnetic perturbations has been suggested. In this work we investigate the effect of resonant magnetic perturbations on the confinement of runaway electrons by simulating their drift orbits in magnetostatic perturbed fields and calculating the orbit losses for various initial energies and magnetic perturbation magnitudes. In the simulations we use a TEXTOR-like configuration and solve the relativistic, gyro-averaged drift equations for the runaway electrons including synchrotron radiation and collisions. The results indicate that runaway electrons are well confined in the core of the device, but the onset time of runaway losses closer to the edge is dependent on the magnetic perturbation level and thereby can affect the maximum runaway current. However, the runaway current damping rate is not sensitive to the magnetic perturbation level, in agreement with experimental observations.

  7. Kinetic modelling of runaway electrons in dynamic scenarios

    Science.gov (United States)

    Stahl, A.; Embréus, O.; Papp, G.; Landreman, M.; Fülöp, T.

    2016-11-01

    Improved understanding of runaway-electron formation and decay processes are of prime interest for the safe operation of large tokamaks, and the dynamics of the runaway electrons during dynamical scenarios such as disruptions are of particular concern. In this paper, we present kinetic modelling of scenarios with time-dependent plasma parameters; in particular, we investigate hot-tail runaway generation during a rapid drop in plasma temperature. With the goal of studying runaway-electron generation with a self-consistent electric-field evolution, we also discuss the implementation of a collision operator that conserves momentum and energy and demonstrate its properties. An operator for avalanche runaway-electron generation, which takes the energy dependence of the scattering cross section and the runaway distribution into account, is investigated. We show that the simplified avalanche model of Rosenbluth and Putvinskii (1997 Nucl. Fusion 37 1355) can give inaccurate results for the avalanche growth rate (either lower or higher) for many parameters, especially when the average runaway energy is modest, such as during the initial phase of the avalanche multiplication. The developments presented pave the way for improved modelling of runaway-electron dynamics during disruptions or other dynamic events.

  8. Microcomputer-Based Approaches for Preventing Drug and Alcohol Abuse Among Adolescents from Ethnic-Racial Minority Backgrounds.

    Science.gov (United States)

    Moncher, Michael S; Parms, Clifford A; Orlandi, Mario A; Schinke, Steven P; Miller, Samuel O; Palleja, Josephine; Schinke, Mary B

    1989-01-01

    This study was designed to empirically assess the potential of microcomputer-based intervention with black adolescents from economically disadvantaged backgrounds. Subjects were 26, 11 through 14-year-old black females and males recruited from three boroughs in New York City. A sample task was administered via microcomputer system followed by a postintervention measurement battery. Observational measures were also employed to assess interactional variables. Subjects' attitudes toward educational content in general, and toward drug and alcohol information delivery in particular, appeared to be a significant intervening variable that could alter the overall efficacy of computer-delivered interventions. Both observational and postintervention measures indicated an overall positive subject response to computer-administered instruction. In contrast, however, respondents indicated a negative response to microcomputer delivery of drug and alcohol related materials. Results of the experiment are discussed along with rationales and future research directions.

  9. Runaway electron dynamics in tokamak plasmas with high impurity content

    Science.gov (United States)

    Martín-Solís, J. R.; Loarte, A.; Lehnen, M.

    2015-09-01

    The dynamics of high energy runaway electrons is analyzed for plasmas with high impurity content. It is shown that modified collision terms are required in order to account for the collisions of the relativistic runaway electrons with partially stripped impurity ions, including the effect of the collisions with free and bound electrons, as well as the scattering by the full nuclear and the electron-shielded ion charge. The effect of the impurities on the avalanche runaway growth rate is discussed. The results are applied, for illustration, to the interpretation of the runaway electron behavior during disruptions, where large amounts of impurities are expected, particularly during disruption mitigation by massive gas injection. The consequences for the electron synchrotron radiation losses and the resulting runaway electron dynamics are also analyzed.

  10. Thermal Runaways in LHC Interconnections: Experiments

    CERN Document Server

    Willering, G P; Bottura, L; Scheuerlein, C; Verweij, A P

    2011-01-01

    The incident in the LHC in September 2008 occurred in an interconnection between two magnets of the 13 kA dipole circuit. This event was traced to a defect in one of the soldered joints between two superconducting cables stabilized by a copper busbar. Further investigation revealed defective joints of other types. A combination of (1) a poor contact between the superconducting cable and the copper stabilizer and (2) an electrical discontinuity in the stabilizer at the level of the connection can lead to an unprotected quench of the busbar. Once the heating power in the unprotected superconducting cable exceeds the heat removal capacity a thermal run-away occurs, resulting in a fast melt-down of the non-stabilized cable. We have performed a thorough investigation of the conditions upon which a thermal run-away in the defect can occur. To this aim, we have prepared heavily instrumented samples with well-defined and controlled defects. In this paper we describe the experiment, and the analysis of the data, and w...

  11. Transit probabilities around hypervelocity and runaway stars

    Science.gov (United States)

    Fragione, G.; Ginsburg, I.

    2017-04-01

    In the blooming field of exoplanetary science, NASA's Kepler Space Telescope has revolutionized our understanding of exoplanets. Kepler's very precise and long-duration photometry is ideal for detecting planetary transits around Sun-like stars. The forthcoming Transiting Exoplanet Survey Satellite (TESS) is expected to continue Kepler's legacy. Along with transits, the Doppler technique remains an invaluable tool for discovering planets. The next generation of spectrographs, such as G-CLEF, promise precision radial velocity measurements. In this paper, we explore the possibility of detecting planets around hypervelocity and runaway stars, which should host a very compact system as consequence of their turbulent origin. We find that the probability of a multiplanetary transit is 10-3 ≲ P ≲ 10-1. We therefore need to observe ∼10-1000 high-velocity stars to spot a transit. However, even if transits are rare around runaway and hypervelocity stars, the chances of detecting such planets using radial velocity surveys is high. We predict that the European Gaia satellite, along with TESS and the new-generation spectrographs G-CLEF and ESPRESSO, will spot planetary systems orbiting high-velocity stars.

  12. Runaway Massive Binaries and Cluster Ejection Scenarios

    CERN Document Server

    McSwain, M V; Boyajian, T S; Grundstrom, E D; Roberts, M S E; Ransom, Scott M.; Boyajian, Tabetha S.; Grundstrom, Erika D.

    2006-01-01

    The production of runaway massive binaries offers key insights into the evolution of close binary stars and open clusters. The stars HD 14633 and HD 15137 are rare examples of such runaway systems, and in this work we investigate the mechanism by which they were ejected from their parent open cluster, NGC 654. We discuss observational characteristics that can be used to distinguish supernova ejected systems from those ejected by dynamical interactions, and we present the results of a new radio pulsar search of these systems as well as estimates of their predicted X-ray flux assuming that each binary contains a compact object. Since neither pulsars nor X-ray emission are observed in these systems, we cannot conclude that these binaries contain compact companions. We also consider whether they may have been ejected by dynamical interactions in the dense environment where they formed, and our simulations of four-body interactions suggest that a dynamical origin is possible but unlikely. We recommend further X-ra...

  13. Measurements of the runaway electron energy during disruptions in the tokamak TEXTOR

    Science.gov (United States)

    Forster, M.; Finken, K. H.; Lehnen, M.; Willi, O.; Xu, Y.; the TEXTOR Team

    2012-05-01

    Calorimetric measurements of the total runaway electron energy are carried out using a reciprocating probe during induced TEXTOR disruptions. A comparison with the energy inferred from runaway energy spectra, which are measured with a scintillator probe, is used as an independent check of the results. A typical runaway current of 100 kA at TEXTOR contains 30 to 35 kJ of runaway energy. The dependencies of the runaway energy on the runaway current, the radial probe position, the toroidal magnetic field and the predisruptive plasma current are studied. The conversion efficiency of the magnetic plasma energy into runaway energy is calculated to be up to 26%.

  14. Pattern of Child Sexual Abuse by Young Aggressors.

    Science.gov (United States)

    Alert-Dancer, Claire; Halley, Nancy; Hamate, Maryam; Bernard-Bonnie, Anne-Claude

    1997-01-01

    Medical evaluation of 316 children, mean age 6 years, found 39 perpetrators of sexual abuse were less than 16 years old and 15 were between 16 and 19. Young aggressors were more likely to abuse older female children. Adolescent aggressors appeared to engage in more genital/genital and genital/anal sexual abuse than older aggressors. (Author/DB)

  15. Substance abuse and health self-perception in Spanish children and adolescents Abuso de sustancias y percepción de la salud en niños y adolescentes españoles

    OpenAIRE

    O. Molinero; A. Salguero; J. Castro-Piñero; Mora, J.; S. Márquez

    2011-01-01

    Objective: The aim of this study was to analyze substance abuse and health self-perception in children and adolescents from the province of Cádiz (Spain). Methodology: Participants were 738 students, 50.9 boys and 49.1% girls, from elementary school to high school (1st to 12th grade, mean age 12.2. years), who responded a Spanish adaptation of the Health Behavior in School-aged Children Inventory. Results: No difference was observed in percentage of boys and girls reporting to smoke or drink ...

  16. Simulation of abuse tolerance of lithium-ion battery packs

    Science.gov (United States)

    Spotnitz, Robert M.; Weaver, James; Yeduvaka, Gowri; Doughty, D. H.; Roth, E. P.

    A simple approach for using accelerating rate calorimetry data to simulate the thermal abuse resistance of battery packs is described. The thermal abuse tolerance of battery packs is estimated based on the exothermic behavior of a single cell and an energy balance than accounts for radiative, conductive, and convective heat transfer modes of the pack. For the specific example of a notebook computer pack containing eight 18650-size cells, the effects of cell position, heat of reaction, and heat-transfer coefficient are explored. Thermal runaway of the pack is more likely to be induced by thermal runaway of a single cell when that cell is in good contact with other cells and is close to the pack wall.

  17. Next Generation Anodes for Lithium-Ion Batteries: Thermodynamic Understanding and Abuse Performance

    Energy Technology Data Exchange (ETDEWEB)

    Fenton, Kyle R. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Allcorn, Eric [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Nagasubramanian, Ganesan [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2016-12-01

    The objectives of this report are as follows: elucidate degradation mechanisms, decomposition products, and abuse response for next generation silicon based anodes; and Understand the contribution of various materials properties and cell build parameters towards thermal runaway enthalpies. Quantify the contributions from particle size, composition, state of charge (SOC), electrolyte to active materials ratio, etc.

  18. One-Dimensional Modelling of Marine Current Turbine Runaway Behaviour

    Directory of Open Access Journals (Sweden)

    Staffan Lundin

    2016-04-01

    Full Text Available If a turbine loses its electrical load, it will rotate freely and increase speed, eventually achieving that rotational speed which produces zero net torque. This is known as a runaway situation. Unlike many other types of turbine, a marine current turbine will typically overshoot the final runaway speed before slowing down and settling at the runaway speed. Since the hydrodynamic forces acting on the turbine are dependent on rotational speed and acceleration, turbine behaviour during runaway becomes important for load analyses during turbine design. In this article, we consider analytical and numerical models of marine current turbine runaway behaviour in one dimension. The analytical model is found not to capture the overshoot phenomenon, while still providing useful estimates of acceleration at the onset of runaway. The numerical model incorporates turbine wake build-up and predicts a rotational speed overshoot. The predictions of the models are compared against measurements of runaway of a marine current turbine. The models are also used to recreate previously-published results for a tidal turbine and applied to a wind turbine. It is found that both models provide reasonable estimates of maximum accelerations. The numerical model is found to capture the speed overshoot well.

  19. Cathode material comparison of thermal runaway behavior of Li-ion cells at different state of charges including over charge

    Science.gov (United States)

    Mendoza-Hernandez, Omar Samuel; Ishikawa, Hiroaki; Nishikawa, Yuuki; Maruyama, Yuki; Umeda, Minoru

    2015-04-01

    The analysis of Li-ion secondary cells under outstanding conditions, as overcharge and high temperatures, is important to determine thermal abuse characteristics of electroactive materials and precise risk assessments on Li-ion cells. In this work, the thermal runaway behavior of LiCoO2 and LiMn2O4 cathode materials were compared at different state of charges (SOCs), including overcharge, by carrying out accelerating rate calorimetry (ARC) measurements using 18650 Li-ion cells. Onset temperatures of self-heating reactions and thermal runaway behavior were identified, and by using these onset points thermal mapping plots were made. We were able to identify non-self-heating, self-heating and thermal runaway regions as a function of state of charge and temperature. The cell using LiMn2O4 cathode material was found to be more thermally stable than the cell using LiCoO2. In parallel with the ARC measurements, the electrochemical behavior of the cells was monitored by measuring the OCV and internal resistance of the cells. The electrochemical behavior of the cells showed a slightly dependency on SOC.

  20. First dedicated observations of runaway electrons in the COMPASS tokamak

    Directory of Open Access Journals (Sweden)

    Vlainić Miloš

    2015-06-01

    Full Text Available Runaway electrons present an important part of the present efforts in nuclear fusion research with respect to the potential damage of the in-vessel components. The COMPASS tokamak a suitable tool for the studies of runaway electrons, due to its relatively low vacuum safety constraints, high experimental flexibility and the possibility of reaching the H-mode D-shaped plasmas. In this work, results from the first experimental COMPASS campaign dedicated to runaway electrons are presented and discussed in preliminary way. In particular, the first observation of synchrotron radiation and rather interesting raw magnetic data are shown.

  1. Runaway electrons as a diagnostic of plasma internal magnetic fluctuations

    Institute of Scientific and Technical Information of China (English)

    Zheng Yong-Zhen; Ding Xuan-Tong; Li Wen-Zhong

    2006-01-01

    The transport of runaway electrons in a high-temperature plasma is relatively easy to measure in a steady state experiment and a perturbation experiment, which provides runaway electron diffusion coefficient Dr. This diffusion coefficient is determined by internal magnetic fluctuations, so it can be interpreted in terms of a magnetic fluctuation level. The internal magnetic fluctuation level (br/BT) is estimated to be about (2-4)×-4 in the HL-1M plasma. The results presented here demonstrate the effectiveness of using runaway electron transport techniques to determine internal magnetic fluctuations. A profile of magnetic fluctuation level in the HL-1M plasma can be estimated from Dr.

  2. Control of disruption-generated runaway plasmas in TFTR

    Science.gov (United States)

    Fredrickson, E. D.; Bell, M. G.; Taylor, G.; Medley, S. S.

    2015-01-01

    Many disruptions in the Tokamak Fusion Test Reactor (TFTR) (Meade and the TFTR Group 1991 Proc. Int. Conf. on Plasma Physics and Controlled Nuclear Fusion (Washington, DC, 1990) vol 1 (Vienna: IAEA) pp 9-24) produced populations of runaway electrons which carried a significant fraction of the original plasma current. In this paper, we describe experiments where, following a disruption of a low-beta, reversed-shear plasma, currents of up to 1 MA carried mainly by runaway electrons were controlled and then ramped down to near zero using the ohmic transformer. In the longer lasting runaway plasmas, events resembling Parail-Pogutse instabilities were observed.

  3. Adolescent loneliness.

    Science.gov (United States)

    Williams, E G

    1983-01-01

    The purpose of this study was to investigate the phenomenon of loneliness in delinquent adolescents with regard to types of delinquency offenses committed, demographic characteristics, and personality characteristics in the areas of interpersonal needs for inclusion, control, and affection. The types of delinquency offenses were categorized as burglary, runaway, drugs, assault, and incorrigible. The demographic variables examined were age, sex, race, family rank or birth order, family structure in terms of parental presence, family income level, religion, and geographic locale. A sample of 98 adolescents was obtained from juvenile detention facilities in three metropolitan areas in the United States. Subjects ranged in age from 12 to 18. Subjects were asked to complete the Loneliness Questionnaire as a self-reported measure of loneliness. Subjects also provided information about themselves relative to demographic characteristics and completed the FIRO-B Questionnaire, which measured interpersonal needs for inclusion, control, and affection. The results revealed no significant differences with regard to any of the demographic variables when the effect of each was considered alone. However, there was a significant effect on loneliness by income when considered jointly with other demographic variables. Adolescents from the middle income group expressed more loneliness than those from the upper and lower income groups. No significant differences were observed with regard to personality characteristics related to interpersonal needs for inclusion and affection, but delinquent adolescents with medium to high needs for control indicated significantly more feelings of loneliness than delinquent adolescents with low needs for control.

  4. Runaway massive stars from R136: VFTS 682 is very likely a "slow runaway"

    CERN Document Server

    Banerjee, Sambaran; Oh, Seungkyung

    2011-01-01

    We conduct a theoretical study on the ejection of runaway massive stars from R136 --- the central massive, star-burst cluster in the 30 Doradus complex of the Large Magellanic Cloud. Specifically, we investigate the possibility of the very massive star (VMS) VFTS 682 being a runaway member of R136. Recent observations of the above VMS, by virtue of its isolated location and its moderate peculiar motion, have raised the fundamental question whether isolated massive star formation is indeed possible. We perform the first realistic N-body computations of fully mass-segregated R136-type star clusters in which all the massive stars are in primordial binary systems. These calculations confirm that the dynamical ejection of a VMS from a R136-like cluster, with kinematic properties similar to those of VFTS 682, is common. Hence the conjecture of isolated massive star formation is unnecessary to account for this VMS. Our results are also quite consistent with the ejection of 30 Dor 016, another suspected runaway VMS f...

  5. Project Runaway: Calibrating the Spectroscopic Distance Scale Using Runaway O and Wolf-Rayet Stars

    Science.gov (United States)

    Hartkopf, William I.; Mason, B. D.

    2009-05-01

    Well-determined O star masses are notoriously difficult to obtain, due to such factors as broad spectral lines, larger and less-reliable average distances, high multiplicity rates, crowded fields, and surrounding nebulosity. Some of these difficulties are reduced for the subset of O stars known as runaways, however. They have escaped some of the nebulosity and crowding, and the event leading to their ejection virtually guarantees that these objects are either single stars or extremely hard spectroscopic binaries. The goal of this project is to increase the sample of known runaway stars, using updated proper motions from the soon-to-be-released UCAC3 catalog, as well as published radial velocities and data from recent duplicity surveys of massive stars using AO and speckle interferometry. Input files include the Galactic O Star Catalog of Maiz-Apellaniz et al. (2004 ApJSS 151, 103) as well as the Seventh Catalogue of Galactic Wolf-Rayet Stars and its more recent Annex (van der Hucht 2001 NewAR 45, 135; 2006 A&A 458, 453). The new runaway star sample will form the basis for a list of SIM targets aimed at improving the distances of Galactic O and WR stars, calibrating the spectroscopic distance scale and leading to more accurate mass estimates for these massive stars.

  6. Runaway electron generation as possible trigger for enhancement of magnetohydrodynamic plasma activity and fast changes in runaway beam behavior

    Energy Technology Data Exchange (ETDEWEB)

    Pankratov, I. M., E-mail: pankratov@kipt.kharkov.ua, E-mail: rjzhou@ipp.ac.cn [Institute of Plasma Physics, NSC Kharkov Institute of Physics and Technology, Academicheskaya Str. 1, 61108 Kharkov (Ukraine); Zhou, R. J., E-mail: pankratov@kipt.kharkov.ua, E-mail: rjzhou@ipp.ac.cn; Hu, L. Q. [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)

    2015-07-15

    Peculiar phenomena were observed during experiments with runaway electrons: rapid changes in the synchrotron spot and its intensity that coincided with stepwise increases in the electron cyclotron emission (ECE) signal (cyclotron radiation of suprathermal electrons). These phenomena were initially observed in TEXTOR (Tokamak Experiment for Technology Oriented Research), where these events only occurred in the current decay phase or in discharges with thin stable runaway beams at a q = 1 drift surface. These rapid changes in the synchrotron spot were interpreted by the TEXTOR team as a fast pitch angle scattering event. Recently, similar rapid changes in the synchrotron spot and its intensity that coincided with stepwise increases in the non-thermal ECE signal were observed in the EAST (Experimental Advanced Superconducting Tokamak) runaway discharge. Runaway electrons were located around the q = 2 rational magnetic surface (ring-like runaway electron beam). During the EAST runaway discharge, stepwise ECE signal increases coincided with enhanced magnetohydrodynamic (MHD) activity. This behavior was peculiar to this shot. In this paper, we show that these non-thermal ECE step-like jumps were related to the abrupt growth of suprathermal electrons induced by bursting electric fields at reconnection events during this MHD plasma activity. Enhancement of the secondary runaway electron generation also occurred simultaneously. Local changes in the current-density gradient appeared because of local enhancement of the runaway electron generation process. These current-density gradient changes are considered to be a possible trigger for enhancement of the MHD plasma activity and the rapid changes in runaway beam behavior.

  7. Street Kids--Homeless and Runaway Youth. Hearing before the Subcommittee on Children, Family, Drugs and Alcoholism of the Committee on Labor and Human Resources, United States Senate. One Hundred First Congress, Second Session.

    Science.gov (United States)

    Congress of the U.S., Washington, DC. Senate Committee on Labor and Human Resources.

    This hearing was the second in a series examining the impact of homelessness and dislocation on young people in America. This session focused on the problems of homeless and runaway adolescents. Witnesses described the need for multiple services for this population, for effective provision of services, and for greater coordination and planning.…

  8. Relativistic Langevin equation for runaway electrons

    Science.gov (United States)

    Mier, J. A.; Martin-Solis, J. R.; Sanchez, R.

    2016-10-01

    The Langevin approach to the kinetics of a collisional plasma is developed for relativistic electrons such as runaway electrons in tokamak plasmas. In this work, we consider Coulomb collisions between very fast, relativistic electrons and a relatively cool, thermal background plasma. The model is developed using the stochastic equivalence of the Fokker-Planck and Langevin equations. The resulting Langevin model equation for relativistic electrons is an stochastic differential equation, amenable to numerical simulations by means of Monte-Carlo type codes. Results of the simulations will be presented and compared with the non-relativistic Langevin equation for RE electrons used in the past. Supported by MINECO (Spain), Projects ENE2012-31753, ENE2015-66444-R.

  9. Runaway breakdown and hydrometeors in lightning initiation.

    Science.gov (United States)

    Gurevich, A V; Karashtin, A N

    2013-05-03

    The particular electric pulse discharges are observed in thunderclouds during the initiation stage of negative cloud-to-ground lightning. The discharges are quite different from conventional streamers or leaders. A detailed analysis reveals that the shape of the pulses is determined by the runaway breakdown of air in the thundercloud electric field initiated by extensive atmospheric showers (RB-EAS). The high amplitude of the pulse electric current is due to the multiple microdischarges at hydrometeors stimulated and synchronized by the low-energy electrons generated in the RB-EAS process. The series of specific pulse discharges leads to charge reset from hydrometeors to the free ions and creates numerous stretched ion clusters, both positive and negative. As a result, a wide region in the thundercloud with a sufficiently high fractal ion conductivity is formed. The charge transport by ions plays a decisive role in the lightning leader preconditioning.

  10. Runaway evaporation for optically dressed atoms

    CERN Document Server

    Wilkowski, David

    2010-01-01

    Forced evaporative cooling in a far-off-resonance optical dipole trap is proved to be an efficient method to produce fermionic- or bosonic-degenerated gases. However in most of the experiences, the reduction of the potential height occurs with a diminution of the collision elastic rate. Taking advantage of a long-living excited state, like in two-electron atoms, I propose a new scheme, based on an optical knife, where the forced evaporation can be driven independently of the trap confinement. In this context, the runaway regime might be achieved leading to a substantial improvement of the cooling efficiency. The comparison with the different methods for forced evaporation is discussed in the presence or not of three-body recombination losses.

  11. Transits Probabilities Around Hypervelocity and Runaway Stars

    CERN Document Server

    Fragione, Giacomo

    2016-01-01

    In the blooming field of exoplanetary science, NASA's Kepler Space Telescope has revolutionized our understanding of exoplanets. Kepler's very precise and long-duration photometry is ideal for detecting planetary transits around Sun-like stars. The forthcoming Transiting Exoplanet Survey Satellite (TESS) is expected to continue Kepler's legacy. In this paper, we explore the possibility of detecting planetary transits around hypervelocity and runaway stars, which should host a very compact system as consequence of their turbulent origin. We find that the probability of a multi-planetary transit is $10^{-3}\\lesssim P\\lesssim 10^{-1}$. We therefore need to observe $\\sim 10-1000$ high-velocity stars to spot a transit. We predict that the European Gaia satellite, along with TESS, could spot such transits.

  12. Naturalness from Runaways in Direct Mediation

    Energy Technology Data Exchange (ETDEWEB)

    Schafer-Nameki, Sakura; /UC, Santa Barbara /King' s Coll. London; Tamarit, Carlos; /UC, Santa Barbara; Torroba, Gonzalo; /SLAC

    2011-02-07

    Postulating that the NMSSM singlet is a meson of a microscopic confining theory opens up new model-building possibilities. Based on this, we construct calculable models of direct mediation that solve the {mu}/B{mu} problem and simultaneously lead to realistic phenomenology. The singlet that couples to the Higgs fields develops a runaway produced by soft interactions, then stabilized by a small superpotential perturbation. The mechanism is first realized in an O'Raifeartaigh model of direct gauge mediation with metastable supersymmetry breaking. Focusing then on the microscopic theory, we argue that super QCD with massless and massive flavors in the free magnetic phase gives rise to this dynamics in the infrared. A deformation of the SQCD superpotential leads to large spontaneous R-symmetry breaking, gaugino masses naturally at the scale of the Higgs mass parameters, and absence of CP violating phases.

  13. Relationship between Childhood Abuse Experience,Parent Attachment and Depression in Adolescents%儿童期虐待、亲子依恋与青少年抑郁的关系

    Institute of Scientific and Technical Information of China (English)

    张迎黎; 杨峘; 梁炜; 张亚林; 杨世昌

    2011-01-01

    目的 探讨儿童期虐待、亲子依恋与青少年抑郁情绪之间的关系.方法 选取河南省新乡市、济源市城区2所中学的736名第7、8、9级初中生为研究对象进行评估.采用儿童期虐待问卷(CTQ)、青少年依恋问卷(IPPA)和儿童抑郁障碍自评量表(DSRSC)分别评估初中生的儿童期受虐经历、亲子依恋关系和抑郁情绪.采用分层回归进行中介作用分析.结果 男性青少年儿童期受虐总分高于女性(分别为33.29±7.89和31.05±6.01,t=4.343,P=0.000),两性母亲依恋(男:59.89±15.86,女:61.45±16.48,t=-1.303,P=0.193)、父亲依恋(男:59.32±17.17,女:60.28±16.95,t=-0.764,P=0.445)、抑郁总分(男:7.68±5.27,女:7.31±4.21,t=1.057,P=0.291)比较差异均无统计学意义.儿童期虐待与青少年抑郁呈正相关(r=0.408,P=0.000),与母亲依恋(r=-0.544,P=0.000)和父亲依恋(r=-0.417,P=0.000)均呈负相关;母亲依恋与父亲依恋呈正相关(r=0.604,P=0.000),均与抑郁情绪呈负相关(r=-0.426,-0.426,Pa=0.000).男性和女性青少年中,亲子依恋均在儿童期虐待经历和抑郁间起部分中介作用.结论 青少年男性受虐高于女性,两性的亲子依恋和抑郁无显著差异;亲子依恋在儿童期虐待经历和抑郁间起部分中介作用,提示提高亲子依恋质量可部分减少虐待对青少年情绪的影响.%Objective To explore the relationship between childhood abuse experience,parent and peer attachment and depression in adolescents.Methods A total of 736 junior students from the 7th,8th and 9th grades of 2 public schools in Xinxiang City and Jiyuan City Henan province completed the questionnaires.Childhood Trauma Questionnaire(CTQ),Inventory of Parent and Peer Attachment(IPPA) and Depression Self-Rating Scale for Children(DSRSC) were employed the childhood abuse experience,parent attachment quality and depressive mood in adolescents,respectively.The hierarchical regression analysis was used to examine the relationship

  14. Mitigating Thermal Runaway Risk in Lithium Ion Batteries

    Science.gov (United States)

    Darcy, Eric; Jeevarajan, Judy; Russell, Samuel

    2014-01-01

    The JSC/NESC team has successfully demonstrated Thermal Runaway (TR) risk reduction in a lithium ion battery for human space flight by developing and implementing verifiable design features which interrupt energy transfer between adjacent electrochemical cells. Conventional lithium ion (li-Ion) batteries can fail catastrophically as a result of a single cell going into thermal runaway. Thermal runaway results when an internal component fails to separate electrode materials leading to localized heating and complete combustion of the lithium ion cell. Previously, the greatest control to minimize the probability of cell failure was individual cell screening. Combining thermal runaway propagation mitigation design features with a comprehensive screening program reduces both the probability, and the severity, of a single cell failure.

  15. Effective critical electric field for runaway electron generation

    CERN Document Server

    Stahl, Adam; Decker, Joan; Embréus, Ola; Fülöp, Tünde

    2014-01-01

    In this letter we investigate factors that influence the effective critical electric field for runaway electron generation in plasmas. We present numerical solutions of the kinetic equation, and discuss the implications for the threshold electric field. We show that the effective electric field necessary for significant runaway formation often is higher than previously calculated due to both (1) extremely strong dependence of primary generation on temperature, and (2) synchrotron radiation losses. We also address the effective critical field in the context of a transition from runaway growth to decay. We find agreement with recent experiments, but show that the observation of an elevated effective critical field can mainly be attributed to changes in the momentum-space distribution of runaways, and only to a lesser extent to a de facto change in the critical field.

  16. Sexual Health Information Seeking Online Among Runaway and Homeless Youth

    OpenAIRE

    Barman-Adhikari, Anamika; Rice, Eric

    2011-01-01

    Research shows runaway and homeless youth are reluctant to seek help from traditional health providers. The Internet can be useful in engaging this population and meeting their needs for sexual health information, including information about HIV and other sexually transmitted infections (STIs). Using a sample of homeless youth living in Los Angeles, California in June 2009, this study assesses the frequency with which runaway and homeless youth seek sexual health information via the Internet,...

  17. Runaway generation during disruptions in JET and TEXTOR

    Energy Technology Data Exchange (ETDEWEB)

    Lehnen, M., E-mail: m.lehnen@fz-juelich.d [Institute of Energy Research - Plasma Physics, Forschungszentrum Juelich GmbH, Association EURATOM-FZJ, Juelich (Germany); Abdullaev, S.S. [Institute of Energy Research - Plasma Physics, Forschungszentrum Juelich GmbH, Association EURATOM-FZJ, Juelich (Germany); Arnoux, G. [EURATOM/UKAEA Fusion Association, Culham Science Centre, OX14 3DB (United Kingdom); Bozhenkov, S.A. [Institute of Energy Research - Plasma Physics, Forschungszentrum Juelich GmbH, Association EURATOM-FZJ, Juelich (Germany); Jakubowski, M.W. [Max-Planck-Institut fuer Plasmaphysik, IPP-EURATOM Association, Teilinstitut Greifswald, Wendelsteinstr. 1, 17491 Greifswald (Germany); Jaspers, R. [FOM-Rijnhuizen, Association EURATOM-FOM, PO Box 1207, 3430 BE Nieuwegein (Netherlands); Plyusnin, V.V. [Instituto de Plasmas e Fusao Nuclear/IST, Associacao EURATOM-IST, Av. Rovisco Pais, 1049-001 Lisbon (Portugal); Riccardo, V. [EURATOM/UKAEA Fusion Association, Culham Science Centre, OX14 3DB (United Kingdom); Samm, U. [Institute of Energy Research - Plasma Physics, Forschungszentrum Juelich GmbH, Association EURATOM-FZJ, Juelich (Germany)

    2009-06-15

    Runaway electrons generated during ITER disruptions are of concern for the integrity of the plasma facing components. It is expected that a power of up to 8 GW is exposed to ITER PFCs. We present in this article observations from JET and TEXTOR on the generation of runaways and the heat load deposition. Suppression techniques like massive gas injection and resonant magnetic perturbations are discussed.

  18. Empirical Quantification of the Runaway Greenhouse Limit on Earth

    Science.gov (United States)

    Goldblatt, C.; Dewey, M. C.

    2015-12-01

    There have been many modeling studies of the runaway greenhouse effect and the conditions required to produce one on an Earth-like planet, however these models have not been verified with empirical evidence. It has been suggested that the Earth's tropics may be near a state of localized runaway greenhouse, meaning the surface temperature and atmospheric composition in those areas could cause runaway greenhouse, were it not for the tempering effects of meridional heat transport and circulation (Pierrehumbert, 1995). Using the assumption that some areas of the Earth's tropics may be under these conditions, this study uses measurements of the atmospheric properties, surface properties, and radiation budgets of these areas to quantify a radiation limit for runaway greenhouse on Earth, by analyzing the dependence of outgoing longwave radiation (OLR) at the top of the atmosphere on surface temperature and total column water vapour. An upper limit on OLR for clear-sky conditions was found between 289.8 W/m2 and 292.2 W/m2, which occurred at surface temperatures near 300K. For surface temperatures above this threshold, total column water vapour increased, but OLR initially decreased and then remained relatively constant, between 273.6 W/m2 and 279.7 W/m2. These limits are in good agreement with recent modeling results (Goldblatt et al., 2013), supporting the idea that some of the Earth's tropics may be in localized runaway greenhouse, and that radiation limits for runaway greenhouse on Earth can be empirically derived. This research was done as part of Maura Dewey's undergraduate honours thesis at the University of Victoria. Refs: Robert T. Pierrehumbert. Thermostats, radiator fins, and the local runaway greenhouse. Journal of Atmospheric Sciences, 52(10):1784-1806, 1995. Colin Goldblatt, Tyler D. Robinson, Kevin J. Zahnle, and David Crisp. Low simulated radiation limit for runaway greenhouse climates. Nature Geoscience, 6:661-667, 2013.

  19. Enhancement of runaway production by resonant magnetic perturbation on J-TEXT

    Science.gov (United States)

    Chen, Z. Y.; Huang, D. W.; Izzo, V. A.; Tong, R. H.; Jiang, Z. H.; Hu, Q. M.; Wei, Y. N.; Yan, W.; Rao, B.; Wang, S. Y.; Ma, T. K.; Li, S. C.; Yang, Z. J.; Ding, D. H.; Wang, Z. J.; Zhang, M.; Zhuang, G.; Pan, Y.; J-TEXT Team

    2016-07-01

    The suppression of runaways following disruptions is key for the safe operation of ITER. The massive gas injection (MGI) has been developed to mitigate heat loads, electromagnetic forces and runaway electrons (REs) during disruptions. However, MGI may not completely prevent the generation of REs during disruptions on ITER. Resonant magnetic perturbation (RMP) has been applied to suppress runaway generation during disruptions on several machines. It was found that strong RMP results in the enhancement of runaway production instead of runaway suppression on J-TEXT. The runaway current was about 50% pre-disruption plasma current in argon induced reference disruptions. With moderate RMP, the runway current decreased to below 30% pre-disruption plasma current. The runaway current plateaus reach 80% of the pre-disruptive current when strong RMP was applied. Strong RMP may induce large size magnetic islands that could confine more runaway seed during disruptions. This has important implications for runaway suppression on large machines.

  20. Phase-space Dynamics of Runaway Electrons In Tokamaks

    Energy Technology Data Exchange (ETDEWEB)

    Xiaoyin Guan, Hong Qin, and Nathaniel J. Fisch

    2010-08-31

    The phase-space dynamics of runaway electrons is studied, including the influence of loop voltage, radiation damping, and collisions. A theoretical model and a numerical algorithm for the runaway dynamics in phase space are developed. Instead of standard integrators, such as the Runge-Kutta method, a variational symplectic integrator is applied to simulate the long-term dynamics of a runaway electron. The variational symplectic integrator is able to globally bound the numerical error for arbitrary number of time-steps, and thus accurately track the runaway trajectory in phase space. Simulation results show that the circulating orbits of runaway electrons drift outward toward the wall, which is consistent with experimental observations. The physics of the outward drift is analyzed. It is found that the outward drift is caused by the imbalance between the increase of mechanical angular momentum and the input of toroidal angular momentum due to the parallel acceleration. An analytical expression of the outward drift velocity is derived. The knowledge of trajectory of runaway electrons in configuration space sheds light on how the electrons hit the first wall, and thus provides clues for possible remedies.

  1. Risk and protective factors for physical and sexual abuse of children and adolescents in Africa: a review and implications for practice.

    Science.gov (United States)

    Meinck, Franziska; Cluver, Lucie D; Boyes, Mark E; Mhlongo, Elsinah L

    2015-01-01

    There is now conclusive evidence of the major and long-lasting negative effects of physical and sexual abuse on children. Within Africa, studies consistently report high rates of child abuse, with prevalence as high as 64%. However, to date, there has been no review of factors associated with physical and sexual child abuse and polyvictimization in Africa. This review identified 23 quantitative studies, all of which showed high levels of child abuse in varying samples of children and adults. Although studies were very heterogeneous, a range of correlates of abuse at different levels of the Model of Ecologic Development were identified. These included community-level factors (exposure to bullying, sexual violence, and rural/urban location), household-level factors (poverty, household violence, and non-nuclear family), caregiver-level factors (caregiver illness in particular AIDS and mental health problems, caregiver changes, family functioning, parenting, caregiver-child relationship, and substance abuse), and child-level factors (age, disability, physical health, behavior, and gender). These findings identify key associated factors that are potential foci of child abuse prevention interventions. In addition, there is a clear need for further rigorous longitudinal research into predictive factors and culturally relevant interventions.

  2. Methylphenidate abuse in Texas, 1998-2004.

    Science.gov (United States)

    Forrester, Mathias B

    2006-06-01

    Methylphenidate is a stimulant used in the treatment of attention deficit hyperactivity disorder in children and is subject to abuse. This study describes the patterns of methylphenidate abuse and drug identification (ID) calls received by several poison control centers in Texas. Cases were calls involving methylphenidate received by Texas poison control centers during 1998-2004. Drug ID and drug abuse calls were assessed by call year and geographic location. Drug abuse calls were then compared to all other human exposure (nonabuse) calls with respect to various factors. Of 6798 calls received involving methylphenidate, 35% were drug IDs and 56% human exposures. Of the human exposures, 9% involved abuse. The number of drug ID calls and drug abuse calls received per year both declined during the first part of 7-yr period but then increased. Male patients accounted for approximately 60% of both drug abuse and nonabuse calls. Adolescent patients comprised 55% of drug abuse calls and children less than 13 yr old comprised 62% of nonabuse calls. Although the majority of both types of human exposures occurred at the patient's own residence, drug abuse calls were more likely than non-abuse calls to involve exposures at school (15% vs. 6%) and public areas (3% vs. 0.4%). While drug abuse calls were less likely than nonabuse calls to present with no clinical effects (29% vs. 52%), they were more likely to show more serious medical outcomes. Methylphenidate abusers are more likely to be adolescents. Methylphenidate abuse as compared to other exposures is more likely to occur outside of the person's home and to involve more serious medical outcomes.

  3. Relationship Between Abuse and Neglect in Childhood and Diabetes in Adulthood: Differential Effects By Sex, National Longitudinal Study of Adolescent Health

    OpenAIRE

    Duncan, Alexis E.; Auslander, Wendy F.; Bucholz, Kathleen K.; Hudson, Darrell L; Stein, Richard I.; White, Neil H.

    2015-01-01

    Introduction Few studies have investigated links between child abuse and neglect and diabetes mellitus in nationally representative samples, and none have explored the role of obesity in the relationship. We sought to determine whether child abuse and neglect were associated with diabetes and if so, whether obesity mediated this relationship in a population-representative sample of young adults. Methods We used data from 14,493 participants aged 24 to 34 years from Wave IV of the National Lon...

  4. Verification of runaway migration in a massive disk

    Energy Technology Data Exchange (ETDEWEB)

    Li, Shengtai [Los Alamos National Laboratory

    2009-01-01

    Runaway migration of a proto-planet was first proposed and observed by Masset and Papaloizou (2003). The semi-major axis of the proto-planet varies by 50% over just a few tens of orbits when runaway migration happens. More recent work by D'Angelo et al. (2005) solved the same problem with locally refined grid and found that the migration rate is sharply reduced and no runaway occurs when the grid cells surrounding the planet are refined enough. To verify these two seemly contradictory results, we independently perform high-resolution simulations, solving the same problem as Masset and Papaloizou (2003), with and without self-gravity. We find that the migration rate is highly dependent on the softening used in the gravitational force between thd disk and planet. When a small softening is used in a 2D massive disk, the mass of the circumplanetary disk (CPD) increases with time with enough resolution in the CPD region. It acts as the mass is continually accreted to the CPD, which cannot be settled down until after thousands of orbits. If the planet is held on a fixed orbit long enough, the mass of CPD will become so large that the condition for the runaway migration derived in Masset (2008) will not be satisfied, and hence the runaway migration will not be triggered. However, when a large softening is used, the mass of the CPD will begin to decrease after the initial increase stage. Our numerical results with and without disk-gravity confirm that the runaway migration indeed exists when the mass deficit is larger than the total mass of the planet and CPD. Our simulations results also show that the torque from the co-orbital region, in particular the planet's Hill sphere, is the main contributor to the runaway migration, and the CPD which is lagged behind by the planet becomes so asymmetric that it accelerates the migration.

  5. The evolution of runaway stellar collision products

    CERN Document Server

    Glebbeek, E; de Mink, S E; Pols, O R; Zwart, S F Portegies

    2009-01-01

    In the cores of young dense star clusters repeated stellar collisions involving the same object can occur, which has been suggested to lead to the formation of an intermediate-mass black hole. In order to verify this scenario we compute the detailed evolution of the merger remnant of three sequences. We follow the evolution until the onset of carbon burning and estimate the final remnant mass to determine the ultimate fate of a runaway merger sequence. We use a detailed stellar evolution code to follow the evolution of the collision product. At each collision, we mix the two colliding stars, taking account of mass loss during the collision. During the stellar evolution we apply mass loss rates from the literature, as appropriate for the evolutionary stage of the merger remnant. We compute models for high ($Z=0.02$) and low ($Z=0.001$) metallicity to quantify metallicity effects. We find that the merger remnant becomes a Wolf-Rayet star before the end of core hydrogen burning. Mass loss from stellar winds domi...

  6. Child Maltreatment and Adolescent Development

    Science.gov (United States)

    Trickett, Penelope K.; Negriff, Sonya; Ji, Juye; Peckins, Melissa

    2011-01-01

    Child abuse and neglect, often collectively called child maltreatment, are huge social problems affecting millions of children and adolescents in America. Adolescents are affected both by maltreatment which occurred during childhood with lingering effects and by maltreatment that continues into or begins in adolescence. Several decades of research…

  7. Physical Abuse

    Science.gov (United States)

    ... be acquaintances, sons, daughters, grandchildren, or others. Physical abuse that is perpetrated by spouses or intimate partners in order to gain power and control over the victim is described in ...

  8. Thermal Runaway Severity Reduction Assessment and Implementation: On Li-Ion Batteries

    Science.gov (United States)

    Darcy, Eric

    2015-01-01

    Preventing cell-cell thermal runaway propagation and flames/sparks from exiting battery enclosure is possible with proper thermal & electrical design and cell thermal runaway ejecta/effluent management and can be had with minimal mass/volume penalty.

  9. 78 FR 64153 - Direct Certification and Certification of Homeless, Migrant and Runaway Children for Free School...

    Science.gov (United States)

    2013-10-28

    ... of Homeless, Migrant and Runaway Children for Free School Meals; Approval of Information Collection... Homeless, Migrant and Runaway Children for Free School Meals was published on April 25, 2011. The ICR...

  10. The behavior of runaway current in massive gas injection fast shutdown plasmas in J-TEXT

    Science.gov (United States)

    Chen, Z. Y.; Huang, D. W.; Luo, Y. H.; Tang, Y.; Dong, Y. B.; Zeng, L.; Tong, R. H.; Wang, S. Y.; Wei, Y. N.; Wang, X. H.; Jian, X.; Li, J. C.; Zhang, X. Q.; Rao, B.; Yan, W.; Ma, T. K.; Hu, Q. M.; Yang, Z. J.; Gao, L.; Ding, Y. H.; Wang, Z. J.; Zhang, M.; Zhuang, G.; Pan, Y.; Jiang, Z. H.; J-TEXT Team

    2016-11-01

    Runaway currents following disruptions have an important effect on the first wall in current tokamaks and will be more severe in next generation tokamaks. The behavior of runaway currents in massive gas injection (MGI) induced disruptions have been investigated in the J-TEXT tokamak. The cold front induced by the gas jet penetrates helically along field lines, preferentially toward the high field side and stops at a location near the q  =  2 surface before the disruption. When the cold front reaches the q  =  2 surface it initiates magnetohydrodynamic activities and results in disruption. It is found that the MGI of He or Ne results in runaway free shutdown in a large range of gas injections. Mixture injection of He and Ar (90% He and 10%Ar) consistently results in runaway free shutdown. A moderate amount of Ar injection could produce significant runaway current. The maximum runaway energy in the runaway plateau is estimated using a simplified model which neglects the drag forces and other energy loss mechanisms. The maximum runaway energy increases with decreasing runaway current. Imaging of the runaway beam using a soft x-ray array during the runaway current plateau indicates that the runaway beam is located in the center of the plasma. Resonant magnetic perturbation (RMP) is applied to reduce the runaway current successfully during the disruption phase in a small scale tokamak, J-TEXT. When the runaway current builds up, the application of RMP cannot decouple the runaway beam due to the lower sensitivity of the energetic runaway electrons to the magnetic perturbation.

  11. The Adolescent Brain

    Science.gov (United States)

    Casey, B. J.; Getz, Sarah; Galvan, Adriana

    2008-01-01

    Adolescence is a developmental period characterized by suboptimal decisions and actions that give rise to an increased incidence of unintentional injuries and violence, alcohol and drug abuse, unintended pregnancy and sexually transmitted diseases. Traditional neurobiological and cognitive explanations for adolescent behavior have failed to…

  12. Adolescent Steroid Use.

    Science.gov (United States)

    Office of Inspector General (DHHS), Washington, DC.

    The study focused on non-medical steroid use by adolescents according to data obtained from the National Institute on Drug Abuse, professional literature, 30 key informants knowledgeable in steroid issues, and 72 current or former steroid users. The findings indicated: (1) over 250,000 adolescents, primarily males, used or have used steroids, and…

  13. Life after the pan and the fire: Depression, order, attachment, and the legacy of abuse among North Korean refugee youth and adolescent children of North Korean refugees.

    Science.gov (United States)

    Emery, Clifton R; Lee, Jung Yun; Kang, Chulhee

    2015-07-01

    Given previous research on depression, history of physical abuse, family order, attachment, and parenting, we hypothesized that the physical abuse-depression relationship would be moderated by (a) family order and (b) attachment, and that (c) attachment and family order would interact significantly in predicting depression. Hypotheses were tested in South Korea in a random cluster sample of 82 youth aged 15-25 who were either themselves North Korean refugees (n=39) or who were born to North Korean refugee mothers in China (n=43). A qualitative interview was used to shed further light on the findings. Family order appears to be a protective factor against depression in that more order is associated with a weakened past abuse-depression relationship.

  14. Runaway pacemaker: a still existing complication and therapeutic guidelines

    DEFF Research Database (Denmark)

    Mickley, H; Andersen, C; Nielsen, L H

    1989-01-01

    Runaway pacemaker is a rare, but still existing potential lethal complication in permanent pacemakers. Within 4 1/2 years, we saw two cases of runaway pacemaker in patients with multiprogrammable, VVI pacemakers (Siemens-Elema, Model 668). In both cases a pacemaker-induced ventricular tachycardia...... (rate 240-260 beats/min) was documented. One patient died. Runaway pacemakers must be exchanged as soon as possible. Until this can be accomplished, different emergency maneuvers should be tried. As documented in the cases presented, placing a magnet over the pacemaker may result in a lower, more...... physiological pacing rate. Reprogramming the pulse generator to a lower output or the use of external chest wall overdrive stimulation may also be successful, but these procedures require the presence of an adequate escape rhythm. If this is not the case or the former maneuvers have failed, an external...

  15. The runaway black hole GRO J1655-40

    CERN Document Server

    Mirabel, I F; Rodrigues, I; Combi, J A; Rodríguez, L F; Guglielmetti, F

    2002-01-01

    We have used the Hubble Space Telescope to measure the motion in the sky and compute the galactocentric orbit of the black hole X-ray binary GRO J1655-40. The system moves with a runaway space velocity of $112\\pm 18$ km s$^{-1}$ in a highly eccentric ($e = 0.34\\pm 0.05$) orbit. The black hole was formed in the disk at a distance greater than 3 kpc from the Galactic centre and must have been shot to such an eccentric orbit by the explosion of the progenitor star. The runaway linear momentum and kinetic energy of this black hole binary are comparable to those of solitary neutron stars and millisecond pulsars. GRO J1655-40 is the first black hole for which there is evidence for a runaway motion imparted by a natal kick in a supernova explosion.

  16. Production of runaway electrons by negative streamer discharges

    DEFF Research Database (Denmark)

    Chanrion, Olivier Arnaud; Neubert, Torsten

    2010-01-01

    of probabilities for electrons to reach energies in the runaway regime shows that even with modest fields, electrons can be energized in negative streamer tips into the runaway regime, creating a beamed distribution in front of the streamer that affects its propagation. The results reported here suggest......In this paper we estimate the probability that cold electrons can be accelerated by an ambient electric field into the runaway regime, and discuss the implications for negative streamer formation. The study is motivated by the discovery of ms duration bursts of γ-rays from the atmosphere above...... thunderstorms, the so-called Terrestrial Gamma-Ray Flashes. The radiation is thought to be bremsstrahlung from energetic (MeV) electrons accelerated in a thunderstorm discharge. The observation goes against conventional wisdom that discharges in air are carried by electrons with energies below a few tens of e...

  17. Magnetic field modification to the relativistic runaway electron avalanche length

    Science.gov (United States)

    Cramer, E. S.; Dwyer, J. R.; Rassoul, H. K.

    2016-11-01

    This paper explores the impact of the geomagnetic field on the relativistic runaway electron avalanche length, λe-. Coleman and Dwyer (2006) developed an analytical fit to Monte Carlo simulations using the Runaway Electron Avalanche Model. In this work, we repeat this process but with the addition of the geomagnetic field in the range of [100,900]/n μT, where n is the ratio of the density of air at altitude to the sea level density. As the ambient electric field approaches the runaway threshold field (Eth≈284 kV/m sea level equivalent), it is shown that the magnetic field has an impact on the orientation of the resulting electron beam. The runaway electrons initially follow the vertically oriented electric field but then are deflected in the v × B direction, and as such, the electrons experience more dynamic friction due to the increase in path length. This will be shown to result in a difference in the avalanche length from the case where B = 0. It will also be shown that the average energy of the runaway electrons will decrease while the required electric field to produce runaway electrons increases. This study is also important in understanding the physics of terrestrial gamma ray flashes (TGFs). Not only will this work impact relativistic feedback rates determined from simulations, it may also be useful in studying spectroscopy of TGFs observed from balloon and aircraft measurements. These models may also be used in determining beaming properties of TGFs originating in the tropical regions seen from orbiting spacecraft.

  18. Parental Influences on Adolescent Marijuana Use and the Baby Boom Generation: Findings from the 1979-1996 National Household Surveys on Drug Abuse. Analytic Series.

    Science.gov (United States)

    Kandel, Denise B.; Griesler, Pamela C.; Lee, Gang; Davies, Mark; Schaffsan, Christine

    This report uses the 1979-1996 National Household Surveys on Drug Abuse to investigate the role of parents, especially members of the baby boom generation, on the marijuana use of children. The association of marijuana use between parents and children, the differences among parental birth cohorts, and the determinants of child marijuana use are…

  19. 男性暴力行为青少年自尊与童年受虐及生活事件的关系%The relationship between self-esteem and childhood abuse, life events among violent male adolescents

    Institute of Scientific and Technical Information of China (English)

    邹志礼; 蒙华庆; 胡华; 王慧; 梁华平; 杜莲; 屈远; 雍那

    2011-01-01

    Objective To study the relationship between self-esteem and childhood abuse, life events among male violent adolescent. Methods According to the modified overt aggression scale, juvenile delinquents were divided into violent group (n = 128 )and nonviolent group (n = 118 ). All the participants were investigated by Self-Esteem Scale (SES), Childhood Trauma Questionnaire-28 Item Short Form (CTQ-SF) and Adolescent SelfRating Life Events (ASLEC) and conducted correlation and regression analysis. Results ①Violent group had lower self-esteem scores ( 22.73 ± 3.30 ) than the nonviolent group ( 23.81 ± 3.30, P < 0.05 ). Violent group had higher scores in physical abuse, sexual abuse, total life events, interpersonal relationship, punishment, and other (8.30 ±4.07, 7.23 ±2.26, 54.48 ±18.60, 10.09 ±3.84, 14.43 ±5.87, 4.93 ±3.15, 9.93 ±3.64), compared to the nonviolent group (7.27 ± 3.27, 6.60 ± 2.09, 45.40 ± 18.45, 8.42 ± 4.13, 11.07 ± 5.75, 3.66 ±2.81, 7.84 ±3.66, P<0. 05). ②The self-esteem was significantly negative correlated with the childhood abuse and life events( r= -0. 143 ~ -0. 358, P< 0.01 ) among violent male adolescents. ③The physical abuse and punishment had significant prediction function of 15.6% on self-esteem. Conclusions Violent adolescents have low self-esteem, which is closely related to childhood abuse and adolescent life events.%目的 探讨暴力行为男性青少年自尊水平及其与童年受虐经历、青少年生活事件的关系.方法 采用自尊量表(SES)、童年期创伤性经历问卷(CTQ-SF)和青少年生活事件量表(ASLEC)对有暴力行为的128名男性青少年和非暴力行为的118名男性青少年进行对照研究,并进行相关和回归分析.结果 ①暴力组自尊水平[(22.73±3.30)分]低于非暴力组[(23.81±3.30)分],躯体虐待和性虐待[分别为(8.30±4.07)分,(7.23±2.26)分]高于非暴力组[分别为(7.27±3.27)分,(6.60±2.09)分],总生活事件、人

  20. Simulation of runaway electrons, transport affected by J-TEXT resonant magnetic perturbation

    Science.gov (United States)

    Jiang, Z. H.; Wang, X. H.; Chen, Z. Y.; Huang, D. W.; Sun, X. F.; Xu, T.; Zhuang, G.

    2016-09-01

    The topology of a magnetic field and transport properties of runaway electrons can be changed by a resonant magnetic perturbation field. The J-TEXT magnetic topology can be effectively altered via static resonant magnetic perturbation (SRMP) and dynamic resonant magnetic perturbation (DRMP). This paper studies the effect of resonant magnetic perturbation (RMP) on the confinement of runaway electrons via simulating their drift orbits in the magnetic perturbation field and calculating the orbit losses for different runaway initial energies and different runaway electrons, initial locations. The model adopted is based on Hamiltonian guiding center equations for runaway electrons, and the J-TEXT magnetic turbulences and RMP are taken into account. The simulation indicates that the loss rate of runaway electrons is sensitive to the radial position of electrons. The loss of energetic runaway beam is dominated by the shrinkage of the confinement region. Outside the shrinkage region of the runaway electrons are lost rapidly. Inside the shrinkage region the runaway beam is confined very well and is less sensitive to the magnetic perturbation. The experimental result on the response of runaway transport to the application RMP indicates that the loss of runaway electrons is dominated by the shrinkage of the confinement region, other than the external magnetic perturbation.

  1. From Planetesimals to Planets in Turbulent Protoplanetary Disks I. Onset of Runaway Growth

    CERN Document Server

    Kobayashi, Hiroshi; Okuzumi, Satoshi

    2015-01-01

    When planetesimals grow via collisions in a turbulent disk, stirring through density fluctuation caused by turbulence effectively increases the relative velocities between planetesimals, which suppresses the onset of runaway growth. We investigate the onset of runaway growth in a turbulent disk through simulations that calculate the mass and velocity evolution of planetesimals. When planetesimals are small, the average relative velocity between planetesimals, $v_{\\rm r}$, is much greater than their surface escape velocity, $v_{\\rm esc}$, so that runaway growth does not occur. As planetesimals become large via collisional growth, $v_{\\rm r}$ approaches $v_{\\rm esc}$. When $v_{\\rm r} \\approx 1.5 v_{\\rm esc}$, runaway growth of the planetesimals occurs. During the oligarchic growth subsequent to runaway growth, a small number of planetary embryos produced via runaway growth become massive through collisions with planetesimals with radii of that at the onset of runaway growth, $r_{\\rm p,run}$. We analytically der...

  2. Observation of runaway electron behaviour during disruptions in LHCD discharges in the HT-7 Tokamak

    Energy Technology Data Exchange (ETDEWEB)

    Lu, H.W.; Hu, L.Q.; Li, S.Y.; Zhou, R.J.; Zhong, G.Q. [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei (China)

    2011-09-15

    Production of runaway electrons during disruptions has been observed in the HT-7 Tokamak. The runaway current plateaus, which can carry part of the pre-disruptive current, are observed in lower-hybrid current drive (LHCD) limiter discharges. It is found that the runaway current can mitigate the disruptions effectively. We can use gas puffing to increase the line-averaged density to restrain the runaway electrons and rebuild the plasmas after the disruptions. Detailed observations are presented on the runaway electrons generated following disruptions in the HT-7 tokamak discharges. The results indicate that the magnetic oscillations play a significant role in the loss of runaway electrons in disruptions. There are two important preconditions to rebuild plasmas by runaway electrons after the disruptions. One of them are weak magnetic oscillations; another one are LHWs (lower-hybrid waves) (copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

  3. Gender Differences Regarding Peer Influence and Attitude toward Substance Abuse.

    Science.gov (United States)

    Rienzi, Beth M.; And Others

    1996-01-01

    To investigate gender differences in acceptance of substance abuse behavior among adolescents, 968 students were administered a questionnaire to assess their perceptions. Results show that both genders felt that boys would be more approving of teenage substance abuse. Most students were disapproving of a teenager driving after drinking. Other…

  4. A Case of Sexual Abuse by a Traditional Faith Healer: Are There Potential Preventions?

    Science.gov (United States)

    Chan, Lai Fong; Tan, Susan Mooi Koon; Ang, Jin Kiat; Kamal Nor, Norazlin; Sharip, Shalisah

    2012-01-01

    Adolescent sexual abuse is not an uncommon phenomenon in Malaysia. It is a traumatic experience that complicates the psychosocial development of young people on the threshold of adulthood. This case report highlights the psychosocial sequelae of adolescent sexual abuse by a traditional healer and discusses management issues in the context of…

  5. Successful Transitions of Runaway/Homeless Youth from Shelter Care

    Science.gov (United States)

    Nebbitt, Von E.; House, Laura E.; Thompson, Sanna J.; Pollio, David E.

    2007-01-01

    Previous research indicates that runaway and homeless youth often achieve positive outcomes after shelter stays however few studies have examined how these outcomes are achieved. This study employs qualitative methods to explicate this phenomenon. Twenty-five providers and 21 youth from four shelters participated in this study. Youth were…

  6. How close is Earth to a runaway greenhouse?

    CERN Document Server

    Ramirez, Ramses M; Lindner, Valerie; Kasting, James F

    2013-01-01

    Recent calculations suggest that the inner edge of the habitable zone around the Sun could be as far out as 0.99 astronomical units (AU)- much closer to the orbit of Earth than had been thought. This reopens the question of whether future increases in atmospheric CO2 might trigger a runaway or moist greenhouse. A runaway greenhouse implies complete ocean vaporization; a moist greenhouse implies that the stratosphere becomes wet, leading to ocean loss via hydrogen escape to space. Previous studies (Kasting and Ackerman, 1986) had indicated that neither a moist nor a runaway greenhouse could be triggered by CO2 increases of any magnitude. Here, we revisit this question with a 1-D climate model that includes updated absorption coefficients for CO2 and H2O, along with an improved parameterization of tropospheric relative humidity. We find that a runaway greenhouse is still precluded. However, a moist greenhouse could conceivably be triggered by an 11-fold increase in atmospheric CO2, and humans could be subject t...

  7. Gang Involvement and Membership among Homeless and Runaway Youth.

    Science.gov (United States)

    Yoder, Kevin A.; Whitbeck, Les B.; Hoyt, Dan R.

    2003-01-01

    Assessed the extent of gang involvement among homeless and runaway youth, comparing gang members, gang-involved youth (not members), and non-gang youth on several dimensions. Interview data indicated that 15.4 percent of the youth were gang members and 32.2 percent were involved in gangs. These youth reported more family problems and school…

  8. Tokamak Plasmas : Runaway electrons in the SINP tokamak

    Indian Academy of Sciences (India)

    Ramesh Narayanan; A N Sekar Iyengar; R Pal

    2000-11-01

    The experimental determination of the dependance of confinement time of runaways on various discharge parameters has been presented along with the angular distribution of hard X-rays (HXrays) emitted from the torus in presence and absence of Langmuir probes.

  9. Effect of Song Writing versus Recreational Music on Posttraumatic Stress Disorder (PTSD) Symptoms and Abuse Attribution in Abused Children.

    Science.gov (United States)

    Coulter, Susan J.

    2000-01-01

    Attempts to develop a song-writing technique to reduce posttraumatic stress disorder (PTSD) symptoms in abused children from 9 to 17 years old, all patients of an inpatient psychiatric child/adolescent unit who had been physically and/or sexually abused. Finds no significant change in overall scores due to treatment condition. (SR)

  10. Substance Abuse Treatment Admissions Aged 12 to 14. The TEDS Report

    Science.gov (United States)

    Substance Abuse and Mental Health Services Administration, 2011

    2011-01-01

    This report uses data from the Treatment Episode Data Set (TEDS) for 2008 to provide information on the characteristics of youths aged 12 to 14 admitted to substance abuse treatment. In 2008, approximately 23,770 substance abuse treatment admissions were adolescents aged 12 to 14. The two most frequently reported primary substances of abuse among…

  11. The Impact of Group Motivational Enhancement Therapy on Motivation to Change among Adolescent Male Substance Abusing Clients in a Controlled Environment

    Science.gov (United States)

    Abo Hamza, Eid Galal

    2011-01-01

    The study's purpose is to examine the effectiveness of Motivational Enhancement Therapy (MET) on motivation to change as measured by the University of Rhode Island Change Assessment (URICA; McConnaughy, Prochaska & Velicer, 1983). Participants were drawn from a convenience sample of 22 adolescent males (treatment group n = 11; control group n =…

  12. Toward DSM-V: An Item Response Theory Analysis of the Diagnostic Process for DSM-IV Alcohol Abuse and Dependence in Adolescents

    Science.gov (United States)

    Gelhorn, Heather; Hartman, Christie; Sakai, Joseph; Stallings, Michael; Young, Susan; Rhee, So Hyun; Corley, Robin; Hewitt, John; Hopger, Christian; Crowley, Thomas D.

    2008-01-01

    Clinical interviews of approximately 5,587 adolescents revealed that DSM-IV diagnostic categories were found to be different in terms of the severity of alcohol use disorders (AUDs). However, a substantial inconsistency and overlap was found in severity of AUDs across categories. The need for an alternative diagnostic algorithm which considers all…

  13. Experimental and theoretical analysis of a method to predict thermal runaway in Li-ion cells

    Science.gov (United States)

    Shah, Krishna; Chalise, Divya; Jain, Ankur

    2016-10-01

    Thermal runaway is a well-known safety concern in Li-ion cells. Methods to predict and prevent thermal runaway are critically needed for enhanced safety and performance. While much work has been done on understanding the kinetics of various heat generation processes during thermal runaway, relatively lesser work exists on understanding how heat removal from the cell influences thermal runaway. Through a unified analysis of heat generation and heat removal, this paper derives and experimentally validates a non-dimensional parameter whose value governs whether or not thermal runaway will occur in a Li-ion cell. This parameter is named the Thermal Runaway Number (TRN), and comprises contributions from thermal transport within and outside the cell, as well as the temperature dependence of heat generation rate. Experimental data using a 26650 thermal test cell are in good agreement with the model, and demonstrate the dependence of thermal runaway on various thermal transport and heat generation parameters. This parameter is used to predict the thermal design space in which the cell will or will not experience thermal runaway. By combining all thermal processes contributing to thermal runaway in a single parameter, this work contributes towards a unified understanding of thermal runaway, and provides the fundamental basis for design tools for safe, high-performance Li-ion batteries.

  14. Childhood Abuse,Attachment,and Adolescent Cluster-B Personality Disorder Tendency%童年期虐待、依恋与青少年B群人格障碍倾向关系的结构方程模型

    Institute of Scientific and Technical Information of China (English)

    彭咏梅; 陈哲; 蔡蓉; 周世杰

    2011-01-01

    目的:探讨儿童期虐待经历和依恋与青少年B群人格障碍倾向的关系模型.方法:采用儿童期虐待问卷(CTO)、成人依恋问卷(AAQ3.1)和人格诊断问卷(PDQ)B群人格分量表对350名青少年进行调查.结果:相关分析表明除情感忽略与表演型、自恋型,躯体忽略与表演型,情感忽略与父亲依恋无显著相关,其余各因子、各变鞋间都有不同程度的显著正相关.结构方程模型结果显示,儿童期虐待和依恋对B群人格障碍倾向有显著正向预测作用,儿童期虐待除直接影响B群人格障碍倾向外,还通过依恋间接影响B群人格障碍倾向.结论:儿童期虐待和不安全依恋对B群人格障碍的形成有重要影响.不安全依恋在儿童虐待对B群人格障碍倾向的影响中起部分中介作用.%Objective: To explore the relationship between childhood abuse, attachment and adolescent's cluster-B personality disorder tendency. Methods: 350 adolescents were investigated with the Childhood Trauma Questionnaire (CTQ), Adult Attachment Questionnaire (AAQ3.1) and the subscales of cluster-B of personality diagnose questionnaire (PDQ). Results: The results of correlation analysis indicated that, except Emotional Neglect with Histrionic and Narcissistic personality disorder and Father Attachment, all of the rest factors of CTQ and AAQ and cluster-B were significantly positively correlated with each other. The results of SEM indicated that CTQ and AAQ could positively predict cluster-B personality disorder tendency. The childhood abuse not only directly predict cluster-B personality disorder tendency,but also indirectly predict cluster-B through attachment. Conclusion: The childhood trauma and attachment have important influence on eluster-B personality disorder tendency. The insecure attachment plays a partially mediating role in the relationship between childhood trauma and cluster-B personality disorder tendency.

  15. Abuso sexual em crianças e adolescentes: revisão de 100 anos de literatura Sexual abuse in children and adolescents: review of 100 years of literature

    Directory of Open Access Journals (Sweden)

    Naura Liane de Oliveira Aded

    2006-01-01

    Full Text Available Maus tratos contra crianças e adolescentes, descritos por Ambroise Tardieu há cerca de um século, tornaram-se objeto de estudo nos últimos quarenta anos. O abuso sexual, uma das formas mais danosas, é conhecido desde a Antiguidade, porém, pouco se avançou no sentido de prevenir e amenizar suas conseqüências. Diferenças culturais, legais e de procedimentos dos profissionais envolvidos talvez expliquem a dificuldade em se estabelecer políticas públicas de prevenção e enfrentamento do problema no mundo inteiro. O presente estudo realizou uma revisão de publicações sobre abuso sexual contra menores em medicina legal e psiquiatria nos últimos cinco anos. A pesquisa, além dos artigos obtidos nas bases Medline/PubMed e Scielo, utilizou capítulos de livros e textos disponíveis on-line e em bibliotecas. Houve unanimidade entre os autores sobre os malefícios à saúde mental das vítimas e sua adaptação e inserção sociais. É patente a importância do exame médico-legal e dos procedimentos policial e judiciário para o estabelecimento da verdade sobre a ocorrência do abuso sexual. Mais estudos são necessários para conhecer essa realidade: prevalência, incidência, desdobramentos legais e conseqüências futuras.Child and adolescent abuse, as described by Ambroise Tardieu about a century ago, became a subject matter in the last forty years. Sexual abuse, one of the most damaging forms of maltreatment, has been known since Antiquity, but very little has been attained as to the prevention and attenuation of its consequences. Cultural differences, as well as legal questions and those regarding procedures from the involved professionals would perhaps explain the difficult to establish public polices for the world wide prevention and resolution of problem. The present study has achieved a literature review of medico-legal and psychiatric publications on the sexual abuse of minors, comprehending the last five years. The search, in

  16. Observation of runaway electrons by infrared camera in J-TEXT

    Science.gov (United States)

    Tong, R. H.; Chen, Z. Y.; Zhang, M.; Huang, D. W.; Yan, W.; Zhuang, G.

    2016-11-01

    When the energy of confined runaway electrons approaches several tens of MeV, the runaway electrons can emit synchrotron radiation in the range of infrared wavelength. An infrared camera working in the wavelength of 3-5 μm has been developed to study the runaway electrons in the Joint Texas Experimental Tokamak (J-TEXT). The camera is located in the equatorial plane looking tangentially into the direction of electron approach. The runaway electron beam inside the plasma has been observed at the flattop phase. With a fast acquisition of the camera, the behavior of runaway electron beam has been observed directly during the runaway current plateau following the massive gas injection triggered disruptions.

  17. The long-term consequences of parental alcohol abuse

    DEFF Research Database (Denmark)

    Christoffersen, Mogens

    , drug addiction) among adolescents from 14 to 27 years old with alcoholic parents. Hospitalisation of adolescents because of psychological disturbances is also seen relatively more often among cases where the parents are alcohol abusers. Similarly, an increased risk of teenage motherhood and youth......Does parents' long-term abuse of alcohol have an impact on children during their formative years? Yes, several long-term consequences for the children result from this study. The study ascertained an increased mortality and high occurrence of self-destructive behavioural forms (attempted suicide...... unemployment is seen in families with evidence of alcohol abuse. In some respects mothers who are alcohol abusers seem to have a different effect on their children than fathers who are alcohol abusers. So, for example, there is a higher occurence of violence-related crimes and convictions for sexual offences...

  18. Prescription Drug Abuse

    Science.gov (United States)

    ... Whether they're using street drugs or medications, drug abusers often have trouble at school, at home, with ... a short period of time may make a drug abuser aggressive or paranoid. Although stimulant abuse might not ...

  19. Prevent Child Abuse America

    Science.gov (United States)

    ... call the police . Crisis and support contacts For Child Abuse Reporting Numbers in your State please visit: Child ... suspected child abuse and neglect. Parent Resources Prevent Child Abuse America (800) CHILDREN A resource for tips, referrals, ...

  20. On the effect of runaway electrons in dense plasma

    Energy Technology Data Exchange (ETDEWEB)

    Ramazanov, T.S.; Turekhanova, K.M. [IETP, Al Farabi Kazakh National University, Tole Bi 96, 480012 Almaty (Kazakhstan)

    2003-10-01

    The effect of runaway electrons has been studied in this work. There were derived the conditions runaway electrons, the influence of electric field on the electron velocity distribution is considered for nonideal classical plasma models. The dependence of friction force on electrons on their velocities,electron-ion collision frequency as a function of the coupling parameter and the strength of critical electric field on particle density and temperature are determined. The results are compared with the asymptotic theory. It has been shown that for the definite density and temperature ranges the difference between critical electric field values is essential for various plasma models. (copyright 2003 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

  1. Thermal runaway caused fire and explosion of lithium ion battery

    Science.gov (United States)

    Wang, Qingsong; Ping, Ping; Zhao, Xuejuan; Chu, Guanquan; Sun, Jinhua; Chen, Chunhua

    2012-06-01

    Lithium ion battery and its safety are taken more consideration with fossil energy consuming and the reduction requirement of CO2 emission. The safety problem of lithium ion battery is mainly contributed by thermal runaway caused fire and explosion. This paper reviews the lithium ion battery hazards, thermal runaway theory, basic reactions, thermal models, simulations and experimental works firstly. The general theory is proposed and detailed reactions are summarized, which include solid electrolyte interface decomposition, negative active material and electrolyte reaction, positive active material and electrolyte reaction, electrolyte decomposition, negative active material and binder reaction, and so on. The thermal models or electrochemical-thermal models include one, two and three dimensional models, which can be simulated by finite element method and finite volume method. And then the related prevention techniques are simply summarized and discussed on the inherent safety methods and safety device methods. Some perspectives and outlooks on safety enhancement for lithium ion battery are proposed for the future development.

  2. Runaway Merging of Black Holes Analytical Constraint on the Timescale

    CERN Document Server

    Mouri, H

    2002-01-01

    Following the discovery of a black hole (BH) with a mass of 10^3-10^6 M(sun) in a starburst galaxy M82, we study formation of such a BH via successive merging of stellar-mass BHs within a star cluster. The merging has a runaway characteristic. This is because massive BHs sink into the cluster core and have a high number density, and because the merging probability is higher for more massive BHs. We use the Smoluchowski equation to study analytically the evolution of the BH mass distribution. Under favorable conditions, which are expected for some star clusters in starburst galaxies, the timescale of the runaway merging is at most of order 10^7 yr. This is short enough to account for the presence of a BH heavier than 10^3 M(sun) in an ongoing starburst region.

  3. Adolescent Marijuana Use and School Attendance

    Science.gov (United States)

    Roebuck, M. Christopher; French, Michael T.; Dennis, Michael L.

    2004-01-01

    This paper explores the relationship between adolescent marijuana use and school attendance. Data were pooled from the 1997 and 1998 National Household Surveys on Drug Abuse to form a sample of 15 168 adolescents, aged 12-18 years, who had not yet complete high school. The analysis determined the role of marijuana use in adolescent school dropout…

  4. Child Abuse and Neglect, Executive Function, and Emotional and Behavioral Problems in Rural Adolescents%儿童期虐待、执行功能与农村青少年情绪行为问题的结构方程模型

    Institute of Scientific and Technical Information of China (English)

    李阳; 曹枫林; 崔乃雪; 李玉丽

    2012-01-01

    目的:探讨儿童期虐待、执行功能与青少年情绪行为问题的关系模型.方法:研究对象为816名农村青少年,调查的问卷包括儿童期创伤问卷(Childhood Trauma Questionnaire,CTQ)、长处和困难量表自评版(Strengths and Difficulties Questionnaire,SDQ)、执行功能行为评定量表自评版(Behavior Rating Inventory of Executive Function-Self Report Version,BRIEF-SR).结果:相关分析表明,除情感忽视与行为管理,躯体虐待、性虐待、情感忽视与元认知,躯体虐待与多动注意不能无相关(均P>0.05),其余各因子、各变量间都呈不同程度的显著正相关.结构方程模型结果显示,儿童期虐待和执行功能对农村青少年情绪行为问题有显著正向预测作用,儿童期虐待除对青少年情绪行为问题有直接作用外,还通过执行功能起到间接作用.结论:儿童期虐待和执行功能对青少年情绪行为问题的形成有重要影响.执行功能在儿童期虐待与青少年情绪行为问题的关系中起部分中介作用.%Objective: To examine the relationship between child abuse and neglect, executive function, and rural ado-lescents' emotional and behavioral problems. Methods: 816 rural adolescents from Shandong Province were asked to complete self-rated questionnaires including Childhood Trauma Questionnaire (CTQ), Strengths and Difficulties Question-naire(SDQ), Behavior Rating Inventory of Executive Function-Self Report Version(BRIEF-SR). Results: Except emotional neglect with behavioral regulation index, physical abuse, sexual abuse, and emotional neglect with metacognition, physical abuse with hyperactivity-inattention, all of the rest factors of CTQ and BRIEF-SR and SDQ were significantly positively correlated with each other. The results of SEM indicated that childhood abuse and neglect and executive function could positively predict adolescents' emotional and behavioral problems. The childhood abuse and neglect not only directly pre

  5. Child/Pet Maltreatment: Adolescents' Ratings of Parent and Owner Behaviors.

    Science.gov (United States)

    Roscoe, Bruce; And Others

    1986-01-01

    Results from an investigation of 614 adolescents' ratings of forms of child and pet maltreatment indicated that adolescents were highly critical of acts which constitute maltreatment, more critical of abusive than neglectful acts, less tolerant of child abuse than pet abuse, but more tolerant of physical force directed toward a child if they had…

  6. ICPP: Scale size of of magnetic turbulence as probed with 30 MeV runaway electrons

    Science.gov (United States)

    Jaspers, Roger

    2000-10-01

    This paper reviews results concerning generation, confinement and transport of runaway electrons in the energy range 20-30 MeV in the TEXTOR tokamak. For future fusion reactors, it is of major importance to know the processes of runaway generation and runaway loss after disruptions, because of the potential damage to first wall components. Second, since the runaway electrons are effectively collisionless, their confinement is determined by the magnetic field turbulence. In this way the runaway transport provides a unique opportunity to probe turbulence in the core of a thermonuclear plasma. Runaway electrons above 20 MeV emit synchrotron radiation in the (near) infrared, which can easily be detected by thermographic cameras. This technique is developed and exploited at the TEXTOR-94 tokamak and has resulted in some spectacular results. These include: the experimental evidence of the secondary (`knock-on') runaway generation; the discovery of the runaway snake; the observation of disruption generated runaways; the probing of magnetic turbulence in the core of the plasma in Ohmic and additionally heated plasmas. The paper reviews these results with special emphasis on the subject of probing magnetic turbulence in the core of the plasma. Measurements in the TEXTOR-94 tokamak show that after switching on Neutral Beam Injection, the runaway population decays. The decay only starts with a significant delay, which decreases with increasing NBI heating power. This delay provides direct evidence of the energy dependence of runaway confinement, which is expected if magnetic modes govern the loss of runaway electrons. These observations allow to estimate the mode width δ of the magnetic perturbations:δ smaller than 0.5 cm in Ohmic discharges, increasing to δ=3D 4.4 cm for 0.6 MW NBI power.

  7. Runaway stars: their impact on the intestellar medium

    CERN Document Server

    Benaglia, Paula; Peri, Cintia S

    2013-01-01

    Runaway, massive stars are not among the most numerous. However, the bow shocks built by their supersonic movement in the interstellar medium have been detected in the infrared range in many cases. Most recently, the stellar bow shocks have been proposed as particle acceleration sites, as radio data analysis at high angular resolution have shown. We present results of different manifestations of the stellar bowshock phenomenon, revealed from modern IR databases.

  8. Thermal instability and runaway criteria: the dangers of disregarding dynamics

    CERN Document Server

    Ball, Rowena

    2012-01-01

    Two exemplary exothermic processes, synthesis of nitroglycerine in a continuous stirred tank reactor (CSTR) and synthesis of the explosive RDX in a CSTR, are used to demonstrate the dangers of ignoring the system dynamics when defining criteria for thermal criticality or runaway. Stability analyses are necessary to prescribe such criteria, and for these systems prove the presence of dangerous oscillatory thermal instability which cannot be detected using the steady state thermal balances.

  9. Alice Munro's "Runaway" in the Mirror of Sigmund Freud

    Directory of Open Access Journals (Sweden)

    Raheleh Bahador

    2015-03-01

    Full Text Available Mirroring the complexities of the human psyche, literature has received new comprehension through a psychoanalytic lens.  Alice Munro's "Runaway" (2003 is character-based and has the psychological analysis potential but it had never received such kind of study. The objective of the present paper is to read Munro's "Runaway" in the mirror of Sigmund Freud to detect the psychological aspects of its fictional characters. The characters are driven by the Freudian mental agencies and undergo phases of psychic disorder.  In the present paper, Munro's short fiction has been discussed based on Sigmund Freud's theory of the Unconscious and its connection with the interpretation of dreams as well as the symbolization of three main characters based on tripartite agencies of the id, ego and superego. Clarifying the latent and manifest levels of characters and the world of dreams indicates the artistic creation of Alice Munro in handling complex characterization. The unconscious and its connection with the female character's dreams have been discussed. The unconscious of the female character is reflected in her dreams in result of repression and asocial drives and desires. Unconscious through dreams is the mirror of the repressed psyche of the female character. Scrutinizing the three main characters in terms of Freudian psychic trilogy, they prove to fit their psychological Freudian terms.  Keywords: Alice Munro, Runaway, Sigmund Freud, Unconscious, Psychology, Id and Ego, Superego

  10. Relativistic runaway breakdown in low-frequency radio

    Science.gov (United States)

    Füllekrug, Martin; Roussel-Dupré, Robert; Symbalisty, Eugene M. D.; Chanrion, Olivier; Odzimek, Anna; van der Velde, Oscar; Neubert, Torsten

    2010-01-01

    The electromagnetic radiation emitted by an electron avalanche beam resulting from relativistic runaway breakdown within the Earth's atmosphere is investigated. It is found from theoretical modeling with a computer simulation that the electron beam emits electromagnetic radiation which is characterized by consecutive broadband pulses in the low-frequency radio range from ˜10 to 300 kHz at a distance of ˜800 km. Experimental evidence for the existence of consecutive broadband pulses is provided by low-frequency radio observations of sprite-producing lightning discharges at a distance of ˜550 km. The measured broadband pulses occur ˜4-9 ms after the sprite-producing lightning discharge, they exhibit electromagnetic radiation which mainly spans the frequency range from ˜50 to 350 kHz, and they exhibit complex waveforms without the typical ionospheric reflection of the first hop sky wave. Two consecutive pulses occur ˜4.5 ms and ˜3 ms after the causative lightning discharge and coincide with the sprite luminosity. It is concluded that relativistic runaway breakdown within the Earth's atmosphere can emit broadband electromagnetic pulses and possibly generates sprites. The source location of the broadband pulses can be determined with an interferometric network of wideband low-frequency radio receivers to lend further experimental support to the relativistic runaway breakdown theory.

  11. Adolescent Brain Development and Drugs

    Science.gov (United States)

    Winters, Ken C.; Arria, Amelia

    2011-01-01

    Research now suggests that the human brain is still maturing during adolescence. The developing brain may help explain why adolescents sometimes make decisions that are risky and can lead to safety or health concerns, including unique vulnerabilities to drug abuse. This article explores how this new science may be put to use in our prevention and…

  12. Genetic and Environmental Influences on Smoking Behavior across Adolescence and Young Adulthood in the Virginia Twin Study of Adolescent Behavioral Development and the Transitions to Substance Abuse Follow-Up.

    Science.gov (United States)

    Do, Elizabeth K; Prom-Wormley, Elizabeth C; Eaves, Lindon J; Silberg, Judy L; Miles, Donna R; Maes, Hermine H

    2015-02-01

    Little is known regarding the underlying relationship between smoking initiation and current quantity smoked during adolescence into young adulthood. It is possible that the influences of genetic and environmental factors on this relationship vary across sex and age. To investigate this further, the current study applied a common causal contingency model to data from a Virginia-based twin study to determine: (1) if the same genetic and environmental factors are contributing to smoking initiation and current quantity smoked; (2) whether the magnitude of genetic and environmental factor contributions are the same across adolescence and young adulthood; and (3) if qualitative and quantitative differences in the sources of variance between males and females exist. Study results found no qualitative or quantitative sex differences in the relationship between smoking initiation and current quantity smoked, though relative contributions of genetic and environmental factors changed across adolescence and young adulthood. More specifically, smoking initiation and current quantity smoked remain separate constructs until young adulthood, when liabilities are correlated. Smoking initiation is explained by genetic, shared, and unique environmental factors in early adolescence and by genetic and unique environmental factors in young adulthood; while current quantity smoked is explained by shared environmental and unique environmental factors until young adulthood, when genetic and unique environmental factors play a larger role.

  13. The Runaway Greenhouse Effect on Earth and other Planets

    Science.gov (United States)

    Rabbette, Maura; Pilewskie, Peter; McKay, Christopher; Young, Robert

    2001-01-01

    Water vapor is an efficient absorber of outgoing longwave infrared radiation on Earth and is the primary greenhouse gas. Since evaporation increases with increasing sea surface temperature, and the increase in water vapor further increases greenhouse warming, there is a positive feedback. The runaway greenhouse effect occurs if this feedback continues unchecked until all the water has left the surface and enters the atmosphere. For Mars and the Earth the runaway greenhouse was halted when water vapor became saturated with respect to ice or liquid water respectively. However, Venus is considered to be an example of a planet where the runaway greenhouse effect did occur, and it has been speculated that if the solar luminosity were to increase above a certain limit, it would also occur on the Earth. Satellite data acquired during the Earth Radiation Budget Experiment (ERBE) under clear sky conditions shows that as the sea surface temperature (SST) increases, the rate of outgoing infrared radiation at the top of the atmosphere also increases, as expected. Over the pacific warm pool where the SST exceeds 300 K the outgoing radiation emitted to space actually decreases with increasing SST, leading to a potentially unstable system. This behavior is a signature of the runaway greenhouse effect on Earth. However, the SST never exceeds 303K, thus the system has a natural cap which stops the runaway. According to Stefan-Boltzmann's law the amount of heat energy radiated by the Earth's surface is proportional to (T(sup 4)). However, if the planet has a substantial atmosphere, it can absorb all infrared radiation from the lower surface before the radiation penetrates into outer space. Thus, an instrument in space looking at the planet does not detect radiation from the surface. The radiation it sees comes from some level higher up. For the earth#s atmosphere the effective temperature (T(sub e)) has a value of 255 K corresponding to the middle troposphere, above most of the

  14. Conhecimentos e percepção de professores sobre maus-tratos em crianças e adolescentes Teachers' knowledge and perceptions of children's and adolescents' abuse

    Directory of Open Access Journals (Sweden)

    Ana Flávia Granville-Garcia

    2009-03-01

    Full Text Available A violência praticada contra a criança e o adolescente permeia a nossa sociedade, fazendo-se presente em todas as camadas sociais. Os profissionais da educação desempenham importante papel na identificação e notificações de maus-tratos no ambiente escolar. Este estudo teve como objetivo verificar o conhecimento e a percepção dos professores de escolas públicas municipais de Caruaru (PE sobre maus-tratos infantis. A amostra foi do tipo não-probabilística, sendo composta de 73 educadores. A técnica de pesquisa utilizada foi a observação direta extensiva e o instrumento consistiu um formulário específico. As variáveis estudadas foram: frequência de maus-tratos, sinais de violência, sexo e idade da vítima, atitude adotada, conhecimento dos professores sobre os órgãos de proteção, recebimento de informações sobre o tema e sua importância. De acordo com os educadores, a frequência de maus-tratos é baixa (16,4%, e o hematoma (44,8%, seguido das marcas de objetos e mãos (20% são os sinais mais frequentes. A idade e o sexo mais citados foram, respectivamente, a escolar (64,4% e o masculino (56,2%. Em 87,3% dos casos, os educadores citaram o Conselho Tutelar como órgão de proteção. Um elevado percentual de professores não tiveram contato com o assunto em pauta durante sua formação (60,3%. A maioria dos educadores demonstraram ter noção do assunto e todos afirmaram ser importante o conhecimento sobre o tema e gostariam de receber capacitação.Violence against children and adolescents affects our society, being present in all social groups. Education professionals play an important role in the identification and notification of child abuse in the school environment. Therefore, this research study had the objective of verifying the knowledge and perception of the teachers of municipal schools of Caruaru (state of Pernambuco, Brazil concerning child abuse. The sample was non-probabilistic, in which 73 professionals

  15. Patient Characteristics and Treatment Outcomes for African American, Hispanic, and White Adolescents in DATOS-A.

    Science.gov (United States)

    Rounds-Bryant, Jennifer L.; Staab, Jennifer

    2001-01-01

    Compared background, pre-treatment characteristics, and post-treatment outcomes of African American, Hispanic, and white adolescent substance abusers participating in the Drug Abuse Treatment Outcome Studies for Adolescents (DATOS-A). Found that patients were similar with respect to basic pre-treatment demographics. Compared to white adolescents,…

  16. Predictors of Resilience in Abused and Neglected Children Grown-Up: The Role of Individual and Neighborhood Characteristics

    Science.gov (United States)

    DuMont, Kimberly A.; Widom, Cathy Spatz; Czaja, Sally J.

    2007-01-01

    Purpose: This paper examines individual, family, and neighborhood level predictors of resilience in adolescence and young adulthood and describes changes in resilience over time from adolescence to young adulthood in abused and neglected children grown up. Method: We use documented cases of childhood physical and sexual abuse and neglect (n = 676)…

  17. Days of Their Lives: Reflections on Adolescent Girls and Adolescent Mothers.

    Science.gov (United States)

    Victor, Susan M.

    1992-01-01

    Reviews literature on issues of sexuality for adolescent girls, interweaving quotes from adolescent mothers. Information comes from the author's work educating teenage parents. The article focuses on the relationship of social pressures to sexuality, femininity, the body, silence and rebellion, adolescent motherhood, and sexual abuse. (SM)

  18. The Effects of Abuse History on Sexually Intrusive Behavior by Children: An Analysis of Child Justice Records

    Science.gov (United States)

    Hershkowitz, Irit

    2011-01-01

    Objectives: A commonly cited risk factor for sexually intrusive behavior (SIB) among children and adolescents is a history of abuse. Based on a large and non-clinical nationwide sample of children who were investigated as abuse victims and suspects of SIBs in Israel over a decade, the present study examines the rate of abuse history among child…

  19. Preventing Sexual Abuse of Persons with Disabilities: A Curriculum for Hearing Impaired, Physically Disabled, Blind and Mentally Retarded Students.

    Science.gov (United States)

    O'Day, Bonnie; And Others

    The curriculum on sexual abuse is intended for professionals working with hearing impaired, physically disabled, blind, and mentally retarded students. Introductory material addresses the vulnerability of disabled adolescents to sexual abuse; presents background information on such topics as victims, offenders, reporting abuse, and Minnesota laws…

  20. Identification and Evaluation of Abused Children at Imam Hossein Hospital

    Directory of Open Access Journals (Sweden)

    Arabghol

    2016-02-01

    Full Text Available Background Child abuse is a phenomenon that confronts the child, family, and society with irretrievable physical and mental injuries, and its negative effects continue until adulthood. Objectives The present study was conducted to identify and evaluate cases of abused children at a medical center. Patients and Methods This is a descriptive-analytic study. The subjects were all children and adolescents who were referred to Imam Hussein hospital within 6 months due to physical or psychiatric reasons and were diagnosed with child abuse and neglect by a child and adolescent psychiatrist. The number of these children was 73. Children and their parents were assessed by schedule for affective disorders and schizophrenia (SADS, Kiddie-SADS, and child abuse and demographic questionnaires. The statistical methods of mean and standard deviation were used to analyze the data. Results 56 cases (76% were physically abused, 53 cases (72.6% were emotionally abused, and 3 cases (12.3% were neglected. The most common psychiatric disorder in abused children was ADHD (65.8%. The next most common were oppositional defiant disorder, obsessive compulsive disorder, general anxiety disorder, and enuresis. About 80% of the abused children had at least one psychiatric disorder. The most common psychiatric disorders in mothers were general anxiety disorder (34.8% and depression (33.3%, and in fathers, it was substance abuse (19.7%. Conclusions Child abuse is a common phenomenon that relates to psychiatric disorders in the abused child or abuser parents. It seems that on-time identification and appropriate interventions can prevent further negative consequences for the child, family, and society.

  1. Forensic child abuse evaluation: a review.

    Science.gov (United States)

    Laraque, Danielle; DeMattia, Amy; Low, Christine

    2006-12-01

    This review discusses the forensic medical and psychological assessments of children and adolescents suspected of being victims of sexual or physical abuse/neglect. Evaluation of the whole child and the need to minimize trauma during the investigative and assessment processes are stressed. The forensic medical examination is reviewed, including the specifics of the pediatric anogenital examination. The key components of the forensic medical examination in sexual assault cases are also reviewed, with particular attention to maintaining the integrity of the process. Special emphasis is placed on the forensic interview in child sexual abuse cases, the best evidence available and areas in need of further research.

  2. MII - S chool : A 3d videogame for the early detection of abuse of substances, bullying, and mental disorders in adolescents

    Directory of Open Access Journals (Sweden)

    José A. Carmona

    2011-06-01

    Full Text Available The current research deals with the preparation and application of an assessment tool aimed at the early detection of drug use, bullying and mental disorders in Secondary Education students in school, family and spare time context. The assessment program we have designed uses 3D virtual environments to realistically recreate, in the style of current videogames, the contexts of drug abuse, bullying and fam ily problems which usually occur during the teenage years. The Mii-School program consist of 17 stages of detailed three-dimensional simulation in which various avatars interact, causing problematic situations in which the participant must choose how he would behave, given the different response choices offered. The program then includes the different response styles of the participant in the situations presented. This would be very relevant from a preventive and therapeutic point of view, as it provides the possibility of knowing what persons would be in a risk situation and their responses in the above mentioned contexts.

  3. Islands of Runaway Electrons in the Textor Tokamak and Relation to Transport in a Stochastic Field

    NARCIS (Netherlands)

    R. Jaspers,; Cardozo, N. J. L.; Finken, K.H.; Schokker, B. C.; Mank, G.; Fuchs, G.; Schüller, F. C.

    1994-01-01

    A population of 30 MeV runaway electrons in the TEXTOR tokamak is diagnosed by their synchrotron emission. During pellet injection a large fraction of the population is lost within 600 mus. This rapid loss is attributed to stochastization of the magnetic field. The remaining runaways form a narrow,

  4. Generation and suppression of runaway electrons in disruption mitigation experiments in TEXTOR

    Energy Technology Data Exchange (ETDEWEB)

    Bozhenkov, S A; Lehnen, M; Finken, K H; Kantor, M; Marchuk, O V; Uzgel, E; Zimmermann, O; Reiter, D [Institute for Energy Research-Plasma Physics, Forschungzentrum Juelich GmbH, EURATOM-Association, Trilateral Euregio Cluster, D-52425 Juelich (Germany); Jakubowski, M W; Wolf, R C [Max-Planck-Institut fuer Plasmaphysik, D-17491 Greifswald (Germany); Jaspers, R [FOM Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster PO BOX 1207, 3430 BE Nieuwegin (Netherlands); Wassenhove, G van [Laboratoire de Physique des Plasmas/Laboratorium voor Plasmafysica, LPP-ERM/KMS, Association EURATOM-Belgian State, Trilateral Euregio Cluster, Brussels (Belgium)], E-mail: s.bozhenkov@fz-juelich.de

    2008-10-15

    Runaway electrons represent a serious problem for the reliable operation of the future experimental tokamak ITER. Due to the multiplication factor of exp(50) in the avalanche even a few seed runaway electrons will result in a beam of high energetic electrons that is able to damage the machine. Thus suppression of runaway electrons is a task of great importance, for which we present here a systematic study of runaway electrons following massive gas injection in TEXTOR. Argon injection can cause the generation of runaways carrying up to 30% of the initial plasma current, while disruptions triggered by injection of helium or of mixtures of argon (5%, 10%, 20%) with deuterium are runaway free. Disruptions caused by argon injection finally become runaway free for very large numbers of injected atoms. The appearance/absence of runaway electrons is related to the fraction of atoms delivered to the plasma centre. This so-called mixing efficiency is deduced from a 0D model of the current quench. The estimated mixing efficiency is 3% for argon, 15% for an argon/deuterium mixture and about 40% for helium. A low mixing efficiency of high-Z impurities can have a strong implication for the design of the disruption mitigation system for ITER. However, a quantitative prediction requires a better understanding of the mixing mechanism.

  5. Runaway electron beam generation and mitigation during disruptions at JET-ILW

    Science.gov (United States)

    Reux, C.; Plyusnin, V.; Alper, B.; Alves, D.; Bazylev, B.; Belonohy, E.; Boboc, A.; Brezinsek, S.; Coffey, I.; Decker, J.; Drewelow, P.; Devaux, S.; de Vries, P. C.; Fil, A.; Gerasimov, S.; Giacomelli, L.; Jachmich, S.; Khilkevitch, E. M.; Kiptily, V.; Koslowski, R.; Kruezi, U.; Lehnen, M.; Lupelli, I.; Lomas, P. J.; Manzanares, A.; De Aguilera, A. Martin; Matthews, G. F.; Mlynář, J.; Nardon, E.; Nilsson, E.; Perez von Thun, C.; Riccardo, V.; Saint-Laurent, F.; Shevelev, A. E.; Sips, G.; Sozzi, C.; contributors, JET

    2015-09-01

    Disruptions are a major operational concern for next generation tokamaks, including ITER. They may generate excessive heat loads on plasma facing components, large electromagnetic forces in the machine structures and several MA of multi-MeV runaway electrons. A more complete understanding of the runaway generation processes and methods to suppress them is necessary to ensure safe and reliable operation of future tokamaks. Runaway electrons were studied at JET-ILW showing that their generation dependencies (accelerating electric field, avalanche critical field, toroidal field, MHD fluctuations) are in agreement with current theories. In addition, vertical stability plays a key role in long runaway beam formation. Energies up to 20 MeV are observed. Mitigation of an incoming runaway electron beam triggered by massive argon injection was found to be feasible provided that the injection takes place early enough in the disruption process. However, suppressing an already accelerated runaway electron beam in the MA range was found to be difficult even with injections of more than 2 kPa.m3 high-Z gases such as krypton or xenon. This may be due to the presence of a cold background plasma weakly coupled to the runaway electron beam which prevents neutrals from penetrating in the electron beam core. Following unsuccessful mitigation attempts, runaway electron impacts on beryllium plasma-facing components were observed, showing localized melting with toroidal asymmetries.

  6. As representações sociais da violência doméstica: uma abordagem preventiva Social representations of physically abused adolescents in violent homes: an preventive approach

    Directory of Open Access Journals (Sweden)

    Maria da Conceição N. Monteiro

    1999-01-01

    marginal or violent conduct and their effect on adolescents' self-image. The data-gathering methodology included an initial interview and questionnaires and records from the Regional Center on Child Abuse (CRAMI to identify reports of physical violence during childhood and to investigate the discourses employed by the various social actors, taking a dialogical perspective as the main source of information and oral and written expression. The analysis was both qualitative and quantitative. The qualitative approach focused on discourse content from a semantic and lexical perspective. The quantitative approach used a factor correspondence analysis aimed at identifying the core social representations of domestic violence in the two groups of adolescents (the study and comparison groups.

  7. 5-HTTLPR and child abuse predict aggressive behavior among Chinese adolescents%5-羟色胺转运体基因多态性对儿童期虐待与青少年攻击行为的调节作用

    Institute of Scientific and Technical Information of China (English)

    张芸; 明庆森; 姚树桥; 陈旺盛

    2012-01-01

    Objective To explore 5 —HTTLPR and child abuse predict aggressive behavior among Chinese adolescents. Methods We examined the effects of child maltreatment (measured using the child trauma questionnaire [CTQ]), polymorphisms in 5— HTTLPR and their interactions with regard to aggressive behavior (assessed by the Child Behavior Checklist for Youth Self—Report [YSR]) for a group of 600 Chinese adolescents using a linear regression analysis. Results Physical abuse, sexual abuse and emotional abuse had main effect irrespectively (P 0. 05). A significant interaction between the 5— HTTLPR and sexual abuse on aggressive behavior for male adolescents (P < 0. 05) was identifies. Adolescents with "SS" genotype of 5— HTTLPR were more prone to commit aggressive behavior than "SL" and "LL"genotypes when suffered sexual abuse. There was no any such correlation found in females. Conclusions Aggressive behaviors in adolescents are modulated by a G —E interaction involving 5—HTTLPR polymorphisms and childhood abuse experience may result in differential propensity to aggressive behaviors among the subtypes of childhood maltreatment and between the two genders.%目的 探讨5-羟色胺转运体(5-hydroxy tryptamine transporter,5-HTT)基因多态性与儿童期虐待对青少年攻击行为的调节作用.方法 使用CTQ(儿童创伤经历问卷)评定儿童期虐待,用YSR(儿童行为量表CBCL自我报告版)评定攻击行为,运用线性回归模型对600名中国青少年检验其儿童期虐待、5-HTTLPR基因多态性对攻击行为的主效应及两者间的基因-环境交互作用.结果 儿童期躯体虐待,性虐待,情感虐待对攻击行为始终有预测效应(P<0.01),5-HTTLPR基因型无主效应(P>0.05);此外,男性青少年5-HTTLPR与性虐待对攻击行为有交互作用(P<0.05),SS基因型个体在受到性虐待后较SL、LL基因型个体更易出现攻击行为;女性则无任何交互作用.结论 儿童期虐待经历

  8. Structure of the runaway electron loss during induced disruptions in TEXTOR

    Science.gov (United States)

    Wongrach, K.; Finken, K. H.; Abdullaev, S. S.; Willi, O.; Zeng, L.; Xu, Y.

    2015-10-01

    The loss of runaway electrons during an induced disruption is recorded by a synchrotron imaging technique using a fast infrared CCD camera. The loss is predominantly diffuse. During the "spiky-loss phase", when the runaway beam moves close to the wall, a narrow channel between the runaway column and a scintillator probe is formed and lasts until the runaway beam is terminated. In some cases, the processed images show a stripe pattern at the plasma edge. A comparison between the MHD dominated disruptions and the MHD-free disruption is performed. A new mechanism of plasma disruptions with the runaway electron generation and a novel model which reproduces many characteristic features of the plasma beam evolution during a disruption is briefly described.

  9. Structure of the runaway electron loss during induced disruptions in TEXTOR

    Energy Technology Data Exchange (ETDEWEB)

    Wongrach, K.; Finken, K. H.; Willi, O. [Institut für Laser- und Plasmaphysik, Heinrich-Heine Universität Düsseldorf, Düsseldorf 40225 (Germany); Abdullaev, S. S. [Institut für Energie- und Klimaforschung, Forschungszentrum Jülich GmbH, Jülich 52428 (Germany); Zeng, L. [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 (China); Xu, Y. [Southwestern Institute of Physics, Chengdu 610041 (China)

    2015-10-15

    The loss of runaway electrons during an induced disruption is recorded by a synchrotron imaging technique using a fast infrared CCD camera. The loss is predominantly diffuse. During the “spiky-loss phase”, when the runaway beam moves close to the wall, a narrow channel between the runaway column and a scintillator probe is formed and lasts until the runaway beam is terminated. In some cases, the processed images show a stripe pattern at the plasma edge. A comparison between the MHD dominated disruptions and the MHD-free disruption is performed. A new mechanism of plasma disruptions with the runaway electron generation and a novel model which reproduces many characteristic features of the plasma beam evolution during a disruption is briefly described.

  10. Observation of the Avalanche of Runaway Electrons in Air in a Strong Electric Field

    Science.gov (United States)

    Gurevich, A. V.; Mesyats, G. A.; Zybin, K. P.; Yalandin, M. I.; Reutova, A. G.; Shpak, V. G.; Shunailov, S. A.

    2012-08-01

    The generation of an avalanche of runaway electrons is demonstrated for the first time in a laboratory experiment. Two flows of runaway electrons are formed sequentially in an extended air discharge gap at the stage of delay of a pulsed breakdown. The first, picosecond, runaway electron flow is emitted in the cathode region where the field is enhanced. Being accelerated in the gap, this beam generates electrons due to impact ionization. These secondary electrons form a delayed avalanche of runaway electrons if the field is strong enough. The properties of the avalanche correspond to the existing notions about the runaway breakdown in air. The measured current of the avalanche exceeds up to an order the current of the initiating electron beam.

  11. Electromagnetic waves destabilized by runaway electrons in near-critical electric fields

    CERN Document Server

    Kómár, A; Fülöp, T

    2013-01-01

    Runaway electron distributions are strongly anisotropic in velocity space. This anisotropy is a source of free energy that may destabilize electromagnetic waves through a resonant interaction between the waves and the energetic electrons. In this work we investigate the high-frequency electromagnetic waves that are destabilized by runaway electron beams when the electric field is close to the critical field for runaway acceleration. Using a runaway electron distribution appropriate for the near-critical case we calculate the linear instability growth rate of these waves and conclude that the obliquely propagating whistler waves are most unstable. We show that the frequencies, wave numbers and propagation angles of the most unstable waves depend strongly on the magnetic field. Taking into account collisional and convective damping of the waves, we determine the number density of runaways that is required to destabilize the waves and show its parametric dependences.

  12. Sexual Health Information Seeking Online Among Runaway and Homeless Youth.

    Science.gov (United States)

    Barman-Adhikari, Anamika; Rice, Eric

    2011-06-01

    Research shows runaway and homeless youth are reluctant to seek help from traditional health providers. The Internet can be useful in engaging this population and meeting their needs for sexual health information, including information about HIV and other sexually transmitted infections (STIs). Using a sample of homeless youth living in Los Angeles, California in June 2009, this study assesses the frequency with which runaway and homeless youth seek sexual health information via the Internet, and assesses which youth are more likely to engage in seeking health information from online sources. Drawing from Andersen's (1968) health behavior model and Pescosolido's (1992) network episode model, we develop and refine a model for seeking online sexual health information among homeless youth. Rather than testing the predicative strength of a given model, our aim is to identify and explore conceptually driven correlates that may shed light on the characteristics associated with these help seeking behaviors among homeless youth. Analyses using multivariate logistic regression models reveal that among the sample of youth, females and gay males most frequently seek sexual health information online. We demonstrate the structure of social network ties (e.g., connection with parents) and the content of interactions (e.g., e-mail forwards of health information) across ties are critical correlates of online sexual health information seeking. Results show a continued connection with parents via the Internet is significantly associated with youth seeking HIV or STI information. Similarly for content of interactions, more youth who were sent health information online also reported seeking HIV information and HIV-testing information. We discuss implications for intervention and practice, focusing on how the Internet may be used for dissemination of sexual health information and as a resource for social workers to link transient, runaway, and homeless youth to care.

  13. Runaway electron beam control for longitudinally pumped metal vapor lasers

    Science.gov (United States)

    Kolbychev, G. V.; Kolbycheva, P. D.

    1995-08-01

    Physics and techniques for producing of the pulsed runaway electron beams are considered. The main obstacle for increasing electron energies in the beams is revealed to be a self- breakdown of the e-gun's gas-filled diode. Two methods to suppress the self-breakdown and enhance the volumetric discharge producing the e-beam are offered and examined. Each of them provides 1.5 fold increase of the ceiling potential on the gun. The methods also give the ways to control several guns simultaneously. Resulting in the possibility of realizing the powerful longitudinal pumping of metal-vapor lasers on self-terminated transitions of atoms or ions.

  14. Runaway electrons preionized diffuse discharges at high pressure

    Science.gov (United States)

    Tarasenko, Victor F.; Lomaev, Mikhail I.; Sorokin, Dmitry A.

    2010-09-01

    Breakdown of the gaps with a non-uniform electric field filled with nitrogen and air as well as with other gases under high-voltage nanosecond pulses was investigated. It is shown that conditions of obtaining a diffuse discharge without a source of additional ionization are extended at the voltage pulse duration decreasing. A volume discharge is formed due to the gap pre-ionization by runaway electrons and X-ray quanta. At a negative polarity of the electrode with a small radius of curvature, a volume (diffuse) discharge formation is determined by pre-ionization with runaway electrons which are generated due to the electric field amplification near the cathode and in the gap. At a positive polarity of the electrode with a small radius of curvature, the X-ray radiation, generated at the runaway electrons braking at the anode and in the gap, is of great importance in a volume discharge formation. A runaway electrons preionized diffuse discharge (REP DD) has two characteristic stages. In the first stage, the ionization wave overlaps the gap during a fraction of a second. The discharge current is determined by the conductivity current in the dense plasma of the ionization wave and the displacement current in the remaining part of the gap. The second stage of the discharge can be related to the anomalous glow discharge with a high specific input power. During the second stage, the gap voltage decreases and the cathode spots formed as a result of explosive electron emission can participate in the electron emission from the cathode. At the increase of the voltage pulse duration and specific input power, the REP DD transforms into a spark discharge form. A REP DD is easily realized in various gases and at different pressures; see [1] and references in [1]. At pressure decrease was obtained the anode electrons beam current to rise (up to ~2 kA/cm2 in helium). At the REP DD, the anode is influenced by the plasma of a dense nanosecond discharge with the specific input power

  15. Substance abuse and health self-perception in Spanish children and adolescents Abuso de sustancias y percepción de la salud en niños y adolescentes españoles

    Directory of Open Access Journals (Sweden)

    O. Molinero

    2011-04-01

    Full Text Available Objective: The aim of this study was to analyze substance abuse and health self-perception in children and adolescents from the province of Cádiz (Spain. Methodology: Participants were 738 students, 50.9 boys and 49.1% girls, from elementary school to high school (1st to 12th grade, mean age 12.2. years, who responded a Spanish adaptation of the Health Behavior in School-aged Children Inventory. Results: No difference was observed in percentage of boys and girls reporting to smoke or drink alcohol. Smoking and drinking habits increased with age, being higher in 11th and 12th grade students. Significant differences were observed among the percentage of smokers and non smokers recognizing to have parents, older brothers or friends who smoke. Rates of drug abuse were generally low, being cannabis the most frequently consumed illicit drug. Most respondents had a perception of excellent or good health, with no significant gender differences. About half of subjects considered that health exclusively depends on self behavior, but an important percentage also gave a relevant role to luck. Stomach-ache was the most frequent physical complaint, followed by headache. Psychological complaints mainly corresponded to nervousness and bad temper. Only a small percentage of subjects declared the use of medicines or tablets without prescription. No significant difference in the percentage of respondent who perceived an excellent or good health was observed among substance users and non users. Conclusions: Substance abuse and health self-perception in children and adolescents are the result of the interaction of a complex series of individual and social factors. Activities aimed to improve health focusing on partial aspects of adolescents' lifestyle most probably will have limited results, and global programs are required.Objetivo: El objetivo del estudio ha sido analizar el uso de sustancias tóxicas y la autopercepción del estado de salud en niños y

  16. Adolescent homosexuality.

    Science.gov (United States)

    Stronski Huwiler, S M; Remafedi, G

    1998-01-01

    Homosexuality has existed in all civilizations, but societal disapproval and cultural taboos have negatively influenced its recognition. A significant percentage of youths identify themselves as homosexual, and even more experience sex with the same sex or are confused about sexual feelings. A unifying etiological theory attributes the expression of sexual orientation to genes that shape the central nervous system's development, organization, and structure via prenatal sex steroids. Environmental factors may influence the expression of genetic potential. Several models of psychosocial development describe initial stages of awareness and confusion about same-sex attractions, followed by acknowledgement of homosexuality, disclosure to others, and eventual integration of sexual identity into a comprehensive sense of self. Stressors related to isolation, stigma, and violence may predispose homosexual adolescents to impaired social, emotional, and physical health, resulting in depression and suicide, school problems, substance abuse, running away eating disorders, risky sexual behavior, and illegal conduct. As with all adolescents, the overall goals in the care of homosexual youth are to promote normal adolescent development, social and emotional well-being, and physical health. A comprehensive, multidisciplinary approach is required to address medical, mental health, and psychosocial issues within the context of the adolescents' community and culture.

  17. [Child psychiatric assessment and the debate regarding the abuse of abuse].

    Science.gov (United States)

    Fegert, J M

    1995-03-01

    The current discussion on false allegations in sexual abuse cases has led to a polarization in the views expressed about the credibility of children. Some authors even speak of a "child sexual accuse syndrome" or of a "sexual abuse allegation in divorce" (SAID) syndrome. A phenomenological analysis of the multiple reasons for misinterpretations is presented. Instead of stressing the importance only of false positives in child sexual abuse questions, an attempt is made to describe reasons for false negatives. Based on a retrospective analysis of 50 consecutive child psychiatric experts in connection with court cases, there does not appear to be an increase in false accusations. Rather, only about one third of the cases even involved suspected sexual abuse. Sexual abuse allegations were much more frequent in girls than in boys. Of 20 abuse allegations we judge four to be false allegations. In only one of these cases, that of an adolescent girl who had been abused in childhood, was the false allegation intended.

  18. Quantification of Lithium-ion Cell Thermal Runaway Energetics

    Energy Technology Data Exchange (ETDEWEB)

    Orendorff, Christopher; Lamb, Joshua; Steele, Leigh Anna Marie; Spangler, Scott Wilmer; Langendorf, Jill Louise

    2016-01-01

    Much of what is known about lithium-ion cell thermal runaway energetics has been measured and extrapolated from data acquired on relatively small cells (< 3 Ah). This work is aimed at understanding the effects of cell size on thermal runaway energetics on cells from 3 to 50 Ah of both LiFePO4 (LFP) and LiNi0.80Co0.15Al0.05O2 (NCA) chemistries. Results show that for both LFP and NCA cells, the normalized heating rate (W/Ah) increases roughly linearly for cells from 3-38 Ah while the normalized total heat released (kJ/Ah) is relatively constant over that cell size range. The magnitude of the normalized heating rate is on the order of 2x greater for NCA relative to LFP chemistries for 2-3 Ah cells, while that difference is on the order of 10x for 30-40 Ah cells. The total normalized heat release is ~ 15-20% greater for NCA relative to LFP cells across the entire size range studied 3-38 Ah.

  19. Massive runaway stars in the Large Magellanic Cloud

    CERN Document Server

    Gvaramadze, V V; Pflamm-Altenburg, J

    2010-01-01

    The origin of massive field stars in the Large Magellanic Cloud (LMC) has long been an enigma. The recent measurements of large offsets (~100 km/s) between the heliocentric radial velocities of some very massive (O2-type) field stars and the systemic LMC velocity provides a possible explanation of this enigma and suggests that the field stars are runaway stars ejected from their birth places at the very beginning of their parent cluster's dynamical evolution. A straightforward way to prove this explanation is to measure the proper motions of the field stars and to show that they are moving away from one of the nearby star clusters or OB associations. This approach however is complicated by the large distance to the LMC, which makes accurate proper motion measurements difficult. We use an alternative approach for solving the problem, based on the search for bow shocks produced by runaway stars. The geometry of detected bow shocks would allow us to infer the direction of stellar motion and thereby to determine ...

  20. Massive runaway stars in the Small Magellanic Cloud

    CERN Document Server

    Gvaramadze, V V; Kroupa, P

    2010-01-01

    Using archival Spitzer Space Telescope data, we identified for the first time a dozen runaway OB stars in the Small Magellanic Cloud (SMC) via detection of their bow shocks. The geometry of detected bow shocks allows us to infer the direction of motion of the associated stars and to determine their possible parent clusters and associations. One of the identified runaway stars, AzV 471, was already known as a high-velocity star on the basis of its high peculiar radial velocity, which is offset by ~40 km/s from the local systemic velocity. We discuss implications of our findings for the problem of the origin of field OB stars. Several of the bow shock-producing stars are found in the confines of associations suggesting that these may be "alien" stars contributing to the observed age spread in such associations. We also report the discovery of a kidney-shaped nebula attached to the early WN-type star SMC-WR3 (AzV 60a). We interpreted this nebula as an interstellar structure created owing to the interaction betwe...

  1. Runaway Events Dominate the Heavy Tail of Citation Distributions

    CERN Document Server

    Golosovsky, Michael

    2013-01-01

    Statistical distributions with heavy tails are ubiquitous in natural and social phenomena. Since the entries in heavy tail have disproportional significance, the knowledge of its exact shape is very important. Citations of scientific papers form one of the best-known heavy tail distributions. Even in this case there is a considerable debate whether citation distribution follows the log-normal or power-law fit. The goal of our study is to solve this debate by measuring citation distribution for a very large and homogeneous data. We measured citation distribution for 418,438 Physics papers published in 1980-1989 and cited by 2008. While the log-normal fit deviates too strong from the data, the discrete power-law function with the exponent $\\gamma=3.15$ does better and fits 99.955% of the data. However, the extreme tail of the distribution deviates upward even from the power-law fit and exhibits a dramatic "runaway" behavior. The onset of the runaway regime is revealed macroscopically as the paper garners 1000-1...

  2. Adolescent attachment and psychopathology.

    Science.gov (United States)

    Rosenstein, D S; Horowitz, H A

    1996-04-01

    The relationships among attachment classification, psychopathology, and personality traits were examined in a group of 60 psychiatrically hospitalized adolescents. The concordance of attachment classification was examined in 27 adolescent-mother pairs. Both adolescent and maternal attachment status were overwhelmingly insecure and were highly concordant. Adolescents showing a dismissing attachment organization were more likely to have a conduct or substance abuse disorder, narcissistic or antisocial personality disorder, and self-reported narcissistic, antisocial, and paranoid personality traits. Adolescents showing a preoccupied attachment organization were more likely to have an affective disorder, obsessive-compulsive, histrionic, borderline or schizotypal personality disorder, and self-reported avoidant, anxious, and dysthymic personality traits. The results support a model of development of psychopathology based partially on relational experiences with parents.

  3. Runaway-electron formation and electron slide-away in an ITER post-disruption scenario

    CERN Document Server

    Stahl, A; Landreman, M; Papp, G; Fülöp, T

    2016-01-01

    Mitigation of runaway electrons is one of the outstanding issues for the reliable operation of ITER and other large tokamaks, and accurate estimates for the expected runaway-electron energies and current are needed. Previously, linearized tools (which assume the runaway population to be small) have been used to study the runaway dynamics, but these tools are not valid in the cases of most interest, i.e. when the runaway population becomes substantial. We study runaway-electron formation in a post-disruption ITER plasma using the newly developed non-linear code NORSE, and describe a feedback mechanism by which a transition to electron slide-away can be induced at field strengths significantly lower than previously expected. If the electric field is actively imposed using the control system, the entire electron population is quickly converted to runaways in the scenario considered. We find the time until the feedback mechanism sets in to be highly dependent on the details of the mechanisms removing heat from th...

  4. Experimental Study of Thermal Runaway Process of 18650 Lithium-Ion Battery

    Directory of Open Access Journals (Sweden)

    Jingjing Liu

    2017-02-01

    Full Text Available This study addresses the effects of the SOC (State of Charge and the charging–discharging process on the thermal runaway of 18650 lithium-ion batteries. A series of experiments were conducted on an electric heating and testing apparatus. The experimental results indicate that 6 W is the critical heating power for 40% SOC. With a 20 W constant heating rate, the thermal runaway initial temperature of the lithium-ion battery decreases with the increasing SOC. The final thermal runaway temperature increases with the SOC when the SOC is lower than 80%. However, a contrary conclusion was obtained when the SOC was higher than 80%. Significant mass loss, accompanied by an intense exothermic reaction, took place under a higher SOC. The critical charging current, beyond which the thermal runaway occurs, was found to be 2.6 A. The thermal runaway initial temperature decreases with the increasing charging current, while the intensity of the exothermic reaction varies inversely. Mass ejection of gas and electrolytes exists during thermal runaway when the charging current is higher than 10.4 A, below which only a large amount of gas is released. The thermal runaway initial temperature of discharging is higher than that of non-discharging.

  5. Prospective Assessment of Cannabis Withdrawal in Adolescents with Cannabis Dependence: A Pilot Study

    Science.gov (United States)

    Milin, Robert; Manion, Ian; Dare, Glenda; Walker, Selena

    2008-01-01

    A study to identify and assess the withdrawal symptoms in adolescents afflicted with cannabis dependence is conducted. Results conclude that withdrawal symptoms of cannabis were present in adolescents seeking treatment for this substance abuse.

  6. Alcoholism and Alcohol Abuse

    Science.gov (United States)

    ... their drinking causes distress and harm. It includes alcoholism and alcohol abuse. Alcoholism, or alcohol dependence, is a disease that causes ... groups. NIH: National Institute on Alcohol Abuse and Alcoholism

  7. Prescription Drug Abuse

    Science.gov (United States)

    ... what the doctor prescribed, it is called prescription drug abuse. It could be Taking a medicine that ... purpose, such as getting high Abusing some prescription drugs can lead to addiction. These include opioids, sedatives, ...

  8. What is Elder Abuse?

    Science.gov (United States)

    ... Strategic Plan Federal Initiatives Career Opportunities Contact Us Administration on Aging (AoA) What is Elder Abuse? What ... Elder Justice & Adult Protective Services Elder Justice Coordinating Council Prevention of Elder Abuse, Neglect and Exploitation (Title ...

  9. Child abuse - physical

    Science.gov (United States)

    ... way Uses harsh discipline Was abused as a child Alcohol or drug problems Emotional problems or mental illness ... Physical abuse - children References Berkowitz CD, Stewart ST. Child maltreatment. In: Marx JA, Hockberger RS, Walls RM, eds. ...

  10. Cough & Cold Medicine Abuse

    Science.gov (United States)

    ... A Week of Healthy Breakfasts Shyness Cough & Cold Medicine Abuse KidsHealth > For Teens > Cough & Cold Medicine Abuse ... DXM Why Do People Use Cough and Cold Medicines to Get High? There's an ingredient in many ...

  11. The runaway greenhouse: implications for future climate change, geoengineering and planetary atmospheres.

    Science.gov (United States)

    Goldblatt, Colin; Watson, Andrew J

    2012-09-13

    The ultimate climate emergency is a 'runaway greenhouse': a hot and water-vapour-rich atmosphere limits the emission of thermal radiation to space, causing runaway warming. Warming ceases only after the surface reaches approximately 1400 K and emits radiation in the near-infrared, where water is not a good greenhouse gas. This would evaporate the entire ocean and exterminate all planetary life. Venus experienced a runaway greenhouse in the past, and we expect that the Earth will in around 2 billion years as solar luminosity increases. But could we bring on such a catastrophe prematurely, by our current climate-altering activities? Here, we review what is known about the runaway greenhouse to answer this question, describing the various limits on outgoing radiation and how climate will evolve between these. The good news is that almost all lines of evidence lead us to believe that is unlikely to be possible, even in principle, to trigger full a runaway greenhouse by addition of non-condensible greenhouse gases such as carbon dioxide to the atmosphere. However, our understanding of the dynamics, thermodynamics, radiative transfer and cloud physics of hot and steamy atmospheres is weak. We cannot therefore completely rule out the possibility that human actions might cause a transition, if not to full runaway, then at least to a much warmer climate state than the present one. High climate sensitivity might provide a warning. If we, or more likely our remote descendants, are threatened with a runaway greenhouse, then geoengineering to reflect sunlight might be life's only hope. Injecting reflective aerosols into the stratosphere would be too short-lived, and even sunshades in space might require excessive maintenance. In the distant future, modifying Earth's orbit might provide a sustainable solution. The runaway greenhouse also remains relevant in planetary sciences and astrobiology: as extrasolar planets smaller and nearer to their stars are detected, some will be in

  12. 童年期虐待、应对方式、自尊与青少年社交恐惧症的相关研究%The correlational study between childhood abuse, coping style, self esteem and adolescent social phobia.

    Institute of Scientific and Technical Information of China (English)

    麻爱华; 于相芬; 刘西俊; 董俊玲; 王相立

    2013-01-01

    Objective To investigate the correlation between childhood abuse, coping style, self esteem and adolescent social phobia, and to explore its relationship with onset age, course of disease and severity of adolescent social phobia. Methods A total of 110 adolescents with social phobia according with CCMD-3 diagnostic criteria and 142 healthy controls were assessed with Childhood Trauma Questionnaire-28 item Short Form (CTQ-SF) , Simplified Coping Style Questionnaire (SCSQ) and Self-Esteem Scale (SES). Moreover, the adolescents with social phobia were assessed with Social Avoidance and Distress Scale ( SAD) and their general clinical data were collected. Results Compared with healthy controls, adolescent social phobia group showed significantly higher total score and all dimensional scores of CTQ-SF ( P < 0. 05) , higher score of positive coping and negative coping of SCSQ ( P < 0. 05) , lower score of SES (P<0. 05). Correlation analysis indicated that score of SAD was significantly positively correlated with total score of CTQ-SF, dimensional scores of CTQ-SF and score of negative coping (P < 0. 01 ), while was significantly negatively correlated with score of positive coping and score of SES (P < 0. 01 ). Non-conditional Logistic regression analysis showed that the level of childhood abuse, emotional abuse (EA) , emotional neglect ( EN) , negative coping and self-esteem took effect on the onset of adolescent social phobia. The onset age was significantly negatively related with total score of CTQ-SF, EA score and EN score (P < 0. 01 ). The course of disease was significantly positively related with the severity of EA and EN (P < 0.05). Conclusion The adolescents with social phobia usually experience more childhood abuse. Risk factors of adolescent social phobia consist of childhood abuse, emotional abuse, emotional neglect, negative coping style and low self-esteem. While positive coping style is protection factor of adolescent social phobia. And the more serious

  13. Clinical Significance of Brain SPECT in Zipeprol Abusers

    Energy Technology Data Exchange (ETDEWEB)

    Cho, Dai Ok; Kim, Jae Phil; Kim, Deog Yoon; Yang, Hyung In; Koh, Eun Mi; Kim, Kwang Won; Choi, Young Kil [Kyung Hee University College of Medicine, Seoul (Korea, Republic of)

    1993-03-15

    Drug abuse is widespread in worldwide and has been associated with neurologic complication. Zipeprol is one of drugs which been abused for psychological satisfaction in some adolescents. This agent is non-opioid antitussive agent, which is not legally considered as being capable of creating dependence or abuse liability at therapeutic serum levels. But it has been reported that acute or chronic overdose create neurologic complication such as convulsion as well as dependence. Recently we experienced six zipeprol abusers who admitted due to convulsion and variable neurologic symptoms. The aim of our study was to determine the role of Tc-99m- HMPAO brain SPECT in those patients. EEG and brain CT showed no abnormal finding, but brain SPECT showed focal or multiple perfusion abnormalities in frontal, parietal, occipital cortex, basal ganglia, thalamus and especially at temporal cortex. These results suggest that brain SPECT may be a useful diagnostic tool to evaluate the cerebral dysfunction induced by zipeprol abuse.

  14. Factores de riesgo asociados al uso de drogas en estudiantes adolescentes Fatores de riscos associados ao uso de drogas entre estudantes adolescentes Risk factors associated with drugs abuse among adolescent students

    Directory of Open Access Journals (Sweden)

    Ever Agustín Osorio Rebolledo

    2004-04-01

    moderados são: a recreação, conduta e escola; e as de baixos riscos, pares, habilidades sociais e o uso de drogas. A pontuação da escala de Índice de Severidade Total é alta, podendo indicar que os adolescentes venezuelanos apresentam maiores riscos para o uso de drogas lícitas e ilícitas, ao mesmo tempo apresentam menores índices de uso de drogas, ou seja, a presença dos fatores de proteção interatuam com os fatores de riscos para modificá-los.This study aims to identify risk factors associated with licit and illicit drugs abuse among adolescent students in various public institutions. Methods: a descriptive study was carried out in Naguanagua, Carabobo, Venezuela and applied the Test Drug Use Screening Inventory questionnaire to an age-stratified sample, involving students between 12 and 17 years old. Results: high-risk areas associated with drugs abuse were family and mental health, while recreation, behavior and school are considered moderate risks. Peers, social abilities and drugs use were identified as low-risk factors. The Total Severity Score is high, which may indicate that Venezuelan adolescents present higher risks for licit and illicit drugs abuse. At the same time, they present lower drugs use rates, that is, the presence of protective factors interact with and modify the risk factors.

  15. Psychopathology and resilience in relation to abuse in childhood among youth first referred to the psychiatrist

    Directory of Open Access Journals (Sweden)

    Pejović-Milovančević Milica

    2014-01-01

    Full Text Available Background/Aim. Child abuse may be related to adverse psychological outcomes in adult life. However, little is known about specific clinical, family and resilience profiles of adolescents that have experienced child abuse. The aim of this study was to investigate clinical symptoms, family functioning and resilience characteristics of adolescents with the experience of abuse, first referred to psychiatrists. Methods. The study included 84 young participants (mean age 14.90 ± 3.10, ranging from 11 to 18 years as consecutive first referrals to the Clinic for Children and Youth of the Institute of Mental Health, Belgrade, Serbia. The sample consisted of two groups, based on the Child Abuse Matrices of Risks. The first group included adolescents with the experience of abuse in childhood (n = 38, 13 males, 25 females, whereas the second, control group, comprised of non-abused adolescents (n = 47, 20 males, 27 females. The presence of abuse was evaluated by the Child Abuse Matrices of Risks. The study used the following questionnaires: Youth Self-Report (YSR, Adolescent Resilience Attitudes Scale (ARAS, and Self-Report Family Inventory (SFI. Results. Significant differences were found only among females. According to YSR, the abused girls had significantly higher scores on the Delinquent Behavior scale and marginally higher scores on Anxious/ Depressed and Social Problems scales. Analyses of the SFI showed significantly lower family functioning among the girls with the child abuse history for all scales except for the Directive Leadership. The abused girls also showed significantly lower scores on the Insight scale, and marginally lower Initiative scores at the ARAS. Conclusions. These findings may have practical application in the creation of specific preventive and treatment strategies, particularly focused on delinquent tendencies, as well as on enhancing resilience through providing positive environments within families, schools and communities.

  16. Factores del abuso sexual en la niñez y la adolescencia en estudiantes de Morelos, México Fatores de abuso sexual na infância e adolescência de estudantes de Morelos, México Factors for sexual abuse during childhood and adolescence in students of Morelos, Mexico

    Directory of Open Access Journals (Sweden)

    Ruben Chavez Ayala

    2009-06-01

    de estudantes do estado de Morelos, México, entre 2004 e 2005. Os participantes (n=1730 pertencem a uma coorte de 13.293 estudantes de 12 a 24 anos. Os dados foram coletados por meio de questionário formado por partes de escalas validadas. As variáveis analisadas foram: fatores sociodemográficos (sexo, zona de residência, nível socioeconômico; familiares (educação dos pais, vícios dos pai, violência entre pais; psicológicos individuais (autoestima- Inventario de Autoestima de Coopersmith, depressão, consumo de álcool; violência intrafamiliar (Escala de Strauss; e abuso sexual. As variáveis dependentes analisadas foram a intenção e o abuso sexual consumado. Os fatores associados foram analisados por meio de regressão logística múltipla, com odds ratios e respectivos intervalos de 95% de confiança (IC 95%. RESULTADOS: Do total, 4,7% (n=80 dos alunos reportaram terem sofrido intenção de abuso e 2,9% foram vítimas de abuso sexual consumado. As mulheres relataram maior prevalência de intenção (6,1%. Foram abusados sexualmente 3,6% das mulheres e 1,9% dos homens. O principal agressor das mulheres foi o namorado e dos homens, uma pessoa desconhecida. A idade do abuso foi de 12,02 anos para mulheres e 11,71 para os homens. Os fatores associados ao abuso foi o maior consumo de álcool pelos pais (RM = 3.37; IC 95% 1.40;8.07; violência contra a mãe (OR=4.49; IC 95%1.54;13.10; ser mulher (OR= 2.47; IC 95%1.17;5.24; ser vítima de violência intrafamiliar alta (OR=3.58; IC 95%1.32;9.67. Autoestima alta foi um fator protetor (RM=0.27; IC 95% 0.09;0.75. CONCLUSÕES: A média de idade do abuso sexual foi de 12 anos em ambos os sexos, sendo mais freqüente entre as do sexo feminino. A maioria das vítimas não denuncia o abuso.OBJECTIVE: To estimate the prevalence and factors associated with sexual abuse in childhood and adolescence. METHODS: Study conducted in a sample of students in the state of Morelos, Mexico, in 2004-2005. Participants (n=1730 were

  17. 反社会行为始于青少年期和儿童期的暴力犯罪青少年童年受虐史、攻击行为的差异比较%Childhood abuse and aggressive behavior in violent adolescent criminals with adolescence-vs children-onset antisocial behavior

    Institute of Scientific and Technical Information of China (English)

    马中锐; 蒙华庆; 胡华; 邹志礼; 王慧; 杜莲; 张洪银

    2012-01-01

    Objective To investigate the differences of childhood abuse, neglect and aggressive behavior between violent adolescent criminals with adolescence- ( AO ) and children-onset ( CO) antisocial behavior, and to explore the relationship of aggressive behavior between AO and CO with being abused. Methods One hundred and ten AO and 110 CO violent adolescent criminals (all males, with an age ranging from 14 to 18) were selected from Chongqing juvenile prison. Another 110 male students at the same age range from an occupation high school served as control. All of them were assessed with the self-made general situation questionnaire, childhood trauma questionnaire-28-item short-form (CTQ-SF) , aggression questionnaire (AQ) and child neglected scale to cross-sectional survey research. Results There were significant differences in the bad habits of parents, dwelling environment, customs, parental rearing styles, and marital status among the 3 groups(P AO group > control. There was positive correlation between aggressive behaviors and childhood abuse both in the AO and CO groups ( rAO = 0. 44, rCO = 0. 78, P <0.01). Conclusion AO group has worse childhood family, social environment, abuse and neglect compared with CO group, but CO group has stronger aggressive behavior. Our results indicate that different measurement should be taken according to the characteristics of different groups of violent criminals in future intervention.%目的 比较反社会行为始于青少年期(adolescence-onset,AO)和始于儿童期(children-onset,CO)的暴力犯罪青少年童年受虐史、攻击行为差异;探索AO与CO攻击行为与受虐的关系.方法 选取14 ~ 18岁男性暴力犯罪青少年AO、CO各110例,选取14 ~ 18岁110例普通男性学生作为对照,采用一般情况问卷、儿童虐待问卷、忽视问卷、攻击问卷进行横断面调查研究.结果 父母不良嗜好、社会风气、父母婚姻及关系、父母教育程度等家庭社会环境因素3

  18. The precise condition of thermal runaway in microwave heating on chemical reaction

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    The precise condition of thermal runaway in microwave heating on chemical reaction with a feedback control system is quantitatively studied. First, the precise condition of thermal runaway in engineering application is derived based on the principle of the feedback control system. Then, the temperature rising rates for 4 different kinds of reaction systems placed in the waveguide and irradiated by micro-wave with different input powers are simulated. Finally, the relationship, which is inattentive so far, between the thermal runaway and the sensor’s response time is discussed.

  19. The precise condition of thermal runaway in microwave heating on chemical reaction

    Institute of Scientific and Technical Information of China (English)

    HUANG KaMa; LU Bo

    2009-01-01

    The precise condition of thermal runaway in microwave heating on chemical reaction with a feedback control system is quantitatively studied. First, the precise condition of thermal runaway in engineering application is derived based on the principle of the feedback control system. Then, the temperature rising rates for 4 different kinds of reaction systems placed in the waveguide and irradiated by micro-wave with different input powers are simulated. Finally, the relationship, which is inattentive so far, between the thermal runaway and the sensor's response time is discussed.

  20. Li-ion battery thermal runaway suppression system using microchannel coolers and refrigerant injections

    Energy Technology Data Exchange (ETDEWEB)

    Bandhauer, Todd M.; Farmer, Joseph C.

    2016-11-08

    A battery management system with thermally integrated fire suppression includes a multiplicity of individual battery cells in a housing; a multiplicity of cooling passages in the housing within or between the multiplicity of individual battery cells; a multiplicity of sensors operably connected to the individual battery cells, the sensors adapted to detect a thermal runaway event related to one or more of the multiplicity of individual battery cells; and a management system adapted to inject coolant into at least one of the multiplicity of cooling passages upon the detection of the thermal runaway event by the any one of the multiplicity of sensors, so that the thermal runaway event is rapidly quenched.

  1. The Role of Cognitive Distortion in the Relationship between Abuse, Assault, and Non-Suicidal Self-Injury

    Science.gov (United States)

    Weismoore, Julie T.; Esposito-Smythers, Christianne

    2010-01-01

    The purpose of this study was to examine the relationship between childhood abuse, assault, cognitive distortion, and non-suicidal self-injury (NSSI) in a clinical adolescent sample. The sample included one hundred eighty-five psychiatrically hospitalized adolescents and their parents. Adolescent participants were predominantly female (71.4%),…

  2. Use of Brief Interventions for Drug Abusing Teenagers within a Middle and High School Setting

    Science.gov (United States)

    Winters, Ken C.; Leitten, Willa; Wagner, Eric; Tevyaw, Tracy O'Leary

    2007-01-01

    Background: Promising and encouraging results have been recently reported on the use of briefer interventions for adolescent drug abusers. Because middle- and high-school-based drug abuse intervention programs have grown in popularity over the past several decades, the use of brief interventions (BIs) in school settings merits consideration.…

  3. Sexual and Physical Abuse History and Adult Sexual Risk Behaviors: Relationships among Women and Potential Mediators

    Science.gov (United States)

    Littleton, Heather; Breitkopf, Carmen Radecki; Berenson, Abbey

    2007-01-01

    Objective: While research has supported associations between experiencing abuse and engaging in risky sexual behaviors during adolescence, research regarding these associations among adult women is much more equivocal. In addition, few studies have attempted to identify potential pathways from abuse experiences to sexual risk behaviors. The…

  4. Assessment of Navy Alcohol and Drug Abuse Education and Training Curricula, Revision Requirements

    Science.gov (United States)

    1986-02-01

    include the following: Introduction to Psychology Adolescent Psychology Maslow’s Hierarchy Abnormal Psychology Defense Mechanisms Anxiety...basic mechanics of how the equipment detects drug usage from body fluids. (Note: Full lesson book is available with EMIT kit from SYVA Corporation...identification procedures, organization of assets for control of alchohol and drug abuse, supervisory role in alcohol and drug abuse programs, local

  5. Catch It Low to Prevent It High: Countering Low-Level Verbal Abuse.

    Science.gov (United States)

    Goldstein, Arnold P.

    2000-01-01

    Focuses on the low-level aggression of verbal abuse demonstrated by children and adolescents. Describes the teasing, cursing, gossip, and ostracism associated with verbal abuse. Provides strategies for working with youth who are verbally aggressive including, how to reduce verbal maltreatment, how to engage in constructive communication, and ways…

  6. History of Abuse and Neglect in Patients with Schizophrenia Who Have a History of Violence

    Science.gov (United States)

    Bennouna-Greene, Mehdi; Bennouna-Greene, Valerie; Berna, Fabrice; Defranoux, Luc

    2011-01-01

    Objective: To determine the prevalence of five forms of abuse/neglect during childhood and adolescence in a group of schizophrenic patients with a history of violence. Methods: Twenty-eight patients hospitalized in a highly secured psychiatric unit were included. Abuse and neglect during patients' growth were evaluated with the childhood trauma…

  7. A Process Model for Understanding Adaptation to Sexual Abuse: The Role of Shame in Defining Stigmatization.

    Science.gov (United States)

    Feiring, Candice; And Others

    1996-01-01

    This article presents a theoretical and testable model of psychological processes in child and adolescent victims of sexual abuse. It proposes that sexual abuse leads to shame through mediation of cognitive attributions which leads to poor adjustment. Three factors--social support, gender, and developmental period--are hypothesized to moderate the…

  8. School Factors as Moderators of the Relationship between Physical Child Abuse and Pathways of Antisocial Behavior

    Science.gov (United States)

    Klika, J. Bart; Herrenkohl, Todd I.; Lee, Jungeun Olivia

    2013-01-01

    Physical child abuse is a predictor of antisocial behavior in adolescence and adulthood. Few studies have investigated factors that moderate the risk of physical child abuse for later occurring outcomes, including antisocial behavior. This analysis uses data from the Lehigh Longitudinal Study to investigate the prediction of antisocial behavior…

  9. Post-Traumatic Stress Disorder and Quality of Life in Sexually Abused Australian Children

    Science.gov (United States)

    Gospodarevskaya, Elena

    2013-01-01

    The study used publicly available data on post-traumatic stress disorder in a sample of the Australian population with a history of sexual abuse to demonstrate how this evidence can inform economic analyses. The 2007 Australian Mental Health Survey revealed that 8.3% of 993 adolescents experienced childhood sexual abuse, of which 40.2% were…

  10. School Factors as Moderators of the Relationship Between Physical Child Abuse and Pathways of Antisocial Behavior

    OpenAIRE

    Klika, J. Bart; Herrenkohl, Todd I.

    2012-01-01

    Physical child abuse is a predictor of antisocial behavior in adolescence and adulthood. Few studies have investigated factors that moderate the risk of physical child abuse for later occurring outcomes, including antisocial behavior. The current analysis uses data from the Lehigh Longitudinal Study to investigate the prediction of antisocial behavior from physical child abuse and the buffering role of 3 school-related factors (i.e., school commitment, school dropout, and IQ) which are hypoth...

  11. Reflexões acerca do abuso de drogas e da violência na adolescência Reflexiones a cerca del abuso de drogas y de la violencia en la adolescencia Reflections concerning the drug abuse and the violence in the adolescence

    Directory of Open Access Journals (Sweden)

    Kelanne Lima da Silva

    2010-09-01

    .Qualitative study that aimed the accomplishment of Health Education actions, seeking the adolescents' critical reflection about the drug abuse and consequent violent behaviors. Carried out at a public school of Fortaleza, with 23 adolescents from 14 to 20 years, in the months of September and October of 2007. It was adopted as theoretic and methodological reference the action research. The data were collected during the realization of four focus groups' workshops, together with the field journal. It was observed that the adolescents try drugs because of lack of information, curiosity and easy access. The drug use can unchain the violence recognized by aggressive attitudes, which limits the understanding. The strategies of Health Education addressed the adolescents contribute to a healthier living standard, because it facilitates the risk factors identification and it has the purpose of reducing those adolescents' vulnerability.

  12. Inhalant Abuse and Dextromethorphan.

    Science.gov (United States)

    Storck, Michael; Black, Laura; Liddell, Morgan

    2016-07-01

    Inhalant abuse is the intentional inhalation of a volatile substance for the purpose of achieving an altered mental state. As an important, yet underrecognized form of substance abuse, inhalant abuse crosses all demographic, ethnic, and socioeconomic boundaries, causing significant morbidity and mortality in school-aged and older children. This review presents current perspectives on epidemiology, detection, and clinical challenges of inhalant abuse and offers advice regarding the medical and mental health providers' roles in the prevention and management of this substance abuse problem. Also discussed is the misuse of a specific "over-the-counter" dissociative, dextromethorphan.

  13. Relativistic runaway breakdown in low-frequency radio

    DEFF Research Database (Denmark)

    Fullekrug, M.; Roussel-Dupre, R.; Symbalisty, E.M.D.

    2011-01-01

    is characterized by consecutive broadband pulses in the low-frequency radio range from similar to 10 to 300 kHz at a distance of similar to 800 km. Experimental evidence for the existence of consecutive broadband pulses is provided by low-frequency radio observations of sprite-producing lightning discharges...... at a distance of similar to 550 km. The measured broadband pulses occur similar to 4-9 ms after the sprite-producing lightning discharge, they exhibit electromagnetic radiation which mainly spans the frequency range from similar to 50 to 350 kHz, and they exhibit complex waveforms without the typical...... ionospheric reflection of the first hop sky wave. Two consecutive pulses occur similar to 4.5 ms and similar to 3 ms after the causative lightning discharge and coincide with the sprite luminosity. It is concluded that relativistic runaway breakdown within the Earth's atmosphere can emit broadband...

  14. A first approach to runaway electron control in FTU

    Energy Technology Data Exchange (ETDEWEB)

    Boncagni, L. [Associazione Euratom/ENEA sulla Fusione, Centro Ricerche Frascati, CP 65, 00044 Frascati, Roma (Italy); Carnevale, D., E-mail: carnevaledaniele@gmail.com [Dipartimento Ing. Civile ed Ing. Informatica Università di Roma, Tor Vergata, Via del Politecnico 1, 00133 Roma (Italy); Cianfarani, C.; Esposito, B. [Associazione Euratom/ENEA sulla Fusione, Centro Ricerche Frascati, CP 65, 00044 Frascati, Roma (Italy); Granucci, G. [Associazione Euratom-CNR sulla Fusione, IFP-CNR, Via R. Cozzi 53, 20125 Milano (Italy); Maddaluno, G.; Marocco, D. [Associazione Euratom/ENEA sulla Fusione, Centro Ricerche Frascati, CP 65, 00044 Frascati, Roma (Italy); Martin-Solis, J.R. [Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911 Leganes-Madrid (Spain); Pucella, G. [Associazione Euratom/ENEA sulla Fusione, Centro Ricerche Frascati, CP 65, 00044 Frascati, Roma (Italy); Sozzi, C. [Associazione Euratom-CNR sulla Fusione, IFP-CNR, Via R. Cozzi 53, 20125 Milano (Italy); Varano, G. [Dipartimento Ing. Civile ed Ing. Informatica Università di Roma, Tor Vergata, Via del Politecnico 1, 00133 Roma (Italy); Vitale, V. [Associazione Euratom/ENEA sulla Fusione, Centro Ricerche Frascati, CP 65, 00044 Frascati, Roma (Italy); Zaccarian, L. [CNRS, LAAS, 7 av. du colonel Roche, F-31400 Toulouse (France); Univ. de Toulouse, LAAS, F-31400 Toulouse (France)

    2013-10-15

    The Plasma Control System (PCS) of the Frascati Tokamak Upgrade (FTU) is not equipped with any runaway electron (RE) beam control or suppression tool. In this paper we propose an upgraded PCS including an architecture for the control of disruption-generated REs that, making use of filtering techniques to estimate the onsets of the current quench (CQ) and of the RE beam current plateau, provides a controlled plasma current shut-down and a simultaneous RE position control. The control strategy is based on a nonlinear technique, called Input Allocation, that allows to re-configure the current in the poloidal field (PF) coils and improve the PCS responsiveness needed for RE position control. Preliminary results on the implementation of the Input Allocation and an experimental proposal to test the control scheme architecture are discussed.

  15. The Thermonuclear Runaway and the Classical Nova Outburst

    CERN Document Server

    Starrfield, S; Hix, W R

    2016-01-01

    Nova explosions occur on the white dwarf component of a Cataclysmic Variable binary stellar system that is accreting matter lost by its companion. When sufficient material has been accreted by the white dwarf, a thermonuclear runaway occurs and ejects material in what is observed as a Classical Nova explosion. We describe both the recent advances in our understanding of the progress of the outburst and outline some of the puzzles that are still outstanding. We report on the effects of improving both the nuclear reaction rate library and including a modern nuclear reaction network in our one-dimensional, fully implicit, hydrodynamic computer code. In addition, there has been progress in observational studies of Supernovae Ia with implications about the progenitors and we discuss that in this review.

  16. Baryogenesis and Gravitational Waves from Runaway Bubble Collisions

    CERN Document Server

    Katz, Andrey

    2016-01-01

    We propose a novel mechanism for production of baryonic asymmetry in the early Universe. The mechanism takes advantage of the strong first order phase transition that produces runaway bubbles in the hidden sector that propagate almost without friction with ultra-relativistic velocities. Collisions of such bubbles can non-thermally produce heavy particles that further decay out-of-equilibrium into the SM and produce the observed baryonic asymmetry. This process can proceed at the very low temperatures, providing a new mechanism of post-sphaleron baryogenesis. In this paper we present a fully calculable model which produces the baryonic asymmetry along these lines as well as evades all the existing cosmological constraints. We emphasize that the Gravitational Waves signal from the first order phase transition is completely generic and can potentially be detected by the future eLISA interferometer. We also discuss other potential signals, which are more model dependent, and point out the unresolved theoretical q...

  17. U.S. tabloid magazine coverage of a celebrity dating abuse incident: Rihanna and Chris Brown.

    Science.gov (United States)

    Rothman, Emily F; Nagaswaran, Anita; Johnson, Renee M; Adams, Kelley M; Scrivens, Juliane; Baughman, Allyson

    2012-01-01

    Dating abuse is a prevalent adolescent health problem with substantial public health consequences. As many as 1 in 10 high school students in the United States reports being "hit, slapped, or physically hurt on purpose" by his or her boyfriend or girlfriend in the past year. The authors used the Rihanna-Chris Brown dating abuse incident of 2009 as a case study to conduct what is, to our knowledge, the first assessment of media framing of dating abuse. The authors reviewed the 20 leading U.S. single-copy sales magazines published from February to April 2009 and identified 48 relevant articles, which were all printed in 7 tabloid magazines. The authors conducted a content analysis of the media frames of the articles using 5 frame categories: (a) abuse is objectionable, (b) victim-blaming, (c) abuse is sexualized/romanticized, (d) myths about abuse perpetration, and (e) abuse is normalized. Abuse is objectionable was the dominant frame of 40% of articles, victim-blaming in 36%. Although the majority of articles reviewed (83%) made at least passing reference to the idea that abuse is wrong, a minority (40%) used a dominant frame that condemned abuse. Instead, the majority of articles communicated mixed messages about dating abuse, and many minimized the seriousness of partner abuse perpetration. Advocacy is needed to improve future tabloid media framing of dating abuse incidents.

  18. Thermal Runaway during Intermediate-Depth Earthquake Rupture

    Science.gov (United States)

    Prieto, German; Florez, Manuel; Barrett, Sarah; Beroza, Gregory; Pedraza, Patricia; Blanco, Jose; Poveda, Esteban

    2014-05-01

    Intermediate-depth earthquakes occur at depths of 50 to 300 km in subducting lithosphere. Despite their ubiquity in earthquake catalogs, their physical mechanism remains unclear because ambient temperatures and pressures are expected to lead to ductile, rather than brittle deformation. There are two leading explanations for the physical mechanism that enables these earthquakes. In the first, high pore pressure from metamorphic dehydration reactions in the subducting slab reduces the effective normal stress sufficiently to enable frictional failure. In the second, slow deformation generates heat, which leads to weakening, further deformation, and a self-localizing thermal shear runaway. We use the nest of intermediate-depth earthquakes under Bucaramanga, Colombia as recorded by the digital RSNC (Red Sísmica Nacional de Colombia) regional seismic network to explore these two possibilities. We observe a combination of high stress drop and low radiation efficiency for Mw 4-5 earthquakes in the Bucaramanga Nest that points to the importance of thermal effects. If we assume a cm-scale fault-zone width, this combination implies a temperature increase of 600-1,000ºC during earthquake failure, which suggests that substantial shear heating, and possibly partial melting, occurs during intermediate-depth earthquake failure. Our observations support thermal shear runaway as the mechanism for intermediate-depth earthquakes. This mechanism could help explain differences in their behavior, such as the paucity of aftershocks, compared to shallow earthquakes. Although we have inferred these mechanisms for intermediate depth earthquakes, it's likely that they would apply for rapid deformation on the deep extensions of fault zones as well - particularly during large earthquakes, such as the 2012 Mw 8.6 strike-slip event off Sumatra, which is inferred to have ruptured well into the oceanic mantle.

  19. Psychological Assessment through Performance-Based Techniques and Self-Reports: A Case Study of a Sexually Abused Girl at Preschool Age

    Science.gov (United States)

    Khalily, Muhammad Tahir; Hallahan, Brian

    2011-01-01

    We investigated the implicit psychological and behavioral consequences of sexual abuse in an adolescent girl who suffered child sexual abuse at preschool age in this case report. We report the manifestations of this abuse on her personality and psychological functioning using a structured clinical interview and a comprehensive psychological…

  20. Interaction of runaway electrons with lower hybrid waves via anomalous Doppler broadening

    Science.gov (United States)

    Martín-Solís, J. R.; Sánchez, R.; Esposito, B.

    2002-05-01

    Due to the relativistic decrease of the electron cyclotron frequency, a cyclotron resonance may appear between runaway electrons and lower hybrid waves. A single particle description of the runaway dynamics [J. R. Martín-Solís et al., Phys. Plasmas 5, 2370 (1998)] is extended to analyze the effect of the interaction of runaway electrons with lower hybrid waves via anomalous Doppler broadening. The conditions under which the resonant interaction can play a role in limiting the runaway energy are established and it is shown that, under typical lower hybrid current drive operation parameters, an efficient wave-particle coupling may occur. Observations of a fast pitch angle scattering event during the current decay phase of Ohmic discharges in the Toroidal Experiment for Technically Oriented Research (TEXTOR) [R. J. E. Jaspers, Ph.D. thesis, Technical University Eindhoven (1995)] are interpreted in terms of such interaction.

  1. Intervention Strategies with Adolescents: The Newton Model.

    Science.gov (United States)

    Green, Matt

    The problem of adolescent drug/alcohol abuse seems to have once again intensified during the 1980s. When the school is the only constant in an adolescent's life and when those same teenagers bring drugs and alcohol-related problems to school, the school has an obligation to implement change. The first step is identification of the problem. Beyond…

  2. Types of Empathy and Adolescent Sexual Offenders

    Science.gov (United States)

    Varker, Tracey; Devilly, Grant J.

    2007-01-01

    The purpose of this study was to examine general empathy, general victim empathy and own victim empathy in adolescent sexual offenders. Sixteen adolescent sexual offenders completed the Interpersonal Reactivity Index (IRI), the Personal Reaction Inventory, a "general sexual abuse victim" form of the Victim Empathy Distortions Scale (VEDS) and an…

  3. A three-dimensional thermal abuse model for lithium-ion cells

    Science.gov (United States)

    Kim, Gi-Heon; Pesaran, Ahmad; Spotnitz, Robert

    To understand further the thermal abuse behavior of large format Li-ion batteries for automotive applications, the one-dimensional modeling approach formulated by Hatchard et al. [T.D. Hatchard, D.D. MacNeil, A. Basu, J.R. Dahn, J. Electrochem. Soc. 148(7) (2001) A755-A761] was reproduced. Then it was extended to three dimensions so we could consider the geometrical features, which are critical in large cells for automotive applications. The three-dimensional model captures the shapes and dimensions of cell components and the spatial distributions of materials and temperatures, and is used to simulate oven tests, and to determine how a local hot spot can propagate through the cell. In simulations of oven abuse testing of cells with cobalt oxide cathode and graphite anode with standard LiPF 6 electrolyte, the three-dimensional model predicts that thermal runaway will occur sooner or later than the lumped model, depending on the size of the cell. The model results showed that smaller cells reject heat faster than larger cells; this may prevent them from going into thermal runaway under identical abuse conditions. In simulations of local hot spots inside a large cylindrical cell, the three-dimensional model predicts that the reactions initially propagate in the azimuthal and longitudinal directions to form a hollow cylinder-shaped reaction zone.

  4. The phenomenon of runaway electrons in partially ionized non-ideal plasma

    Energy Technology Data Exchange (ETDEWEB)

    Ramazanov, T S; Turekhanova, K M [IETP, Al Farabi Kazakh National University, Tole Bi 96a, 050012 Almaty (Kazakhstan)], E-mail: kunduz@physics.kz

    2009-05-29

    The effect of runaway electrons in partially ionized hydrogen plasma is investigated on the basis of pseudopotential models. The conditions of runaway electrons were determined. Dependences of an electron free path on the plasma density and coupling parameter were obtained. It is shown that if the quantum-mechanical and screening effects in non-ideal partially ionized plasma are taken into consideration, the collision frequency curve for electrons has maxima and free path curves for electrons have minima.

  5. Failure Analysis to Identify Thermal Runaway of Bypass Diodes in Fielded Modules

    Energy Technology Data Exchange (ETDEWEB)

    Xiao, Chuanxiao, Uchida, Yasunori; Johnston, Steve; Hacke, Peter; Wohlgemuth, John; Al-Jassim, Mowafak

    2017-03-14

    We studied a bypass diode recuperated from fielded modules in a rooftop installation to determine the failure mechanism. The field-failed diode showed similar characteristics to thermal runaway, specifically X-ray tomography evidence of migrated metal. We also observed burn marks on the silicon surface like those lab-stressed for thermal runaway. Reaction products are more soluble than silicon and the surface is oxygen rich.

  6. Maturation of the adolescent brain

    Directory of Open Access Journals (Sweden)

    Arain M

    2013-04-01

    Full Text Available Mariam Arain, Maliha Haque, Lina Johal, Puja Mathur, Wynand Nel, Afsha Rais, Ranbir Sandhu, Sushil Sharma Saint James School of Medicine, Kralendijk, Bonaire, The Netherlands Abstract: Adolescence is the developmental epoch during which children become adults – intellectually, physically, hormonally, and socially. Adolescence is a tumultuous time, full of changes and transformations. The pubertal transition to adulthood involves both gonadal and behavioral maturation. Magnetic resonance imaging studies have discovered that myelinogenesis, required for proper insulation and efficient neurocybernetics, continues from childhood and the brain's region-specific neurocircuitry remains structurally and functionally vulnerable to impulsive sex, food, and sleep habits. The maturation of the adolescent brain is also influenced by heredity, environment, and sex hormones (estrogen, progesterone, and testosterone, which play a crucial role in myelination. Furthermore, glutamatergic neurotransmission predominates, whereas gamma-aminobutyric acid neurotransmission remains under construction, and this might be responsible for immature and impulsive behavior and neurobehavioral excitement during adolescent life. The adolescent population is highly vulnerable to driving under the influence of alcohol and social maladjustments due to an immature limbic system and prefrontal cortex. Synaptic plasticity and the release of neurotransmitters may also be influenced by environmental neurotoxins and drugs of abuse including cigarettes, caffeine, and alcohol during adolescence. Adolescents may become involved with offensive crimes, irresponsible behavior, unprotected sex, juvenile courts, or even prison. According to a report by the Centers for Disease Control and Prevention, the major cause of death among the teenage population is due to injury and violence related to sex and substance abuse. Prenatal neglect, cigarette smoking, and alcohol consumption may also

  7. Predicted Space Motions for Hypervelocity and Runaway Stars: Proper Motions and Radial Velocities for the GAIA Era

    CERN Document Server

    Kenyon, Scott J; Brown, Warren R; Geller, Margaret J

    2014-01-01

    We predict the distinctive three dimensional space motions of hypervelocity stars (HVSs) and runaway stars moving in a realistic Galactic potential. For nearby stars with distances less than 10~kpc, unbound stars are rare; however, proper motions isolate bound HVSs and runaways from indigenous halo stars. Towards the Galactic Center, high proper motion stars are a unique signature of HVSs or runaways. At larger distances of 20-100 kpc, unbound HVSs are much more common than runaways; radial velocities easily distinguish both from indigenous halo stars. Comparisons of the predictions with existing observations are encouraging. Although the models fail to match observations of solar-type HVS candidates from SEGUE, they agree well with data for B-type HVS and runaways from other surveys. Complete samples of g <= 20 stars with GAIA should provide clear tests of formation models for HVSs and runaways and will enable accurate probes of the shape of the Galactic potential.

  8. Personality Assessment Inventory (PAI) Profiles of Adult Female Abuse Survivors.

    Science.gov (United States)

    Cherepon, Joseph Adam; Prinzhorn, Bradford

    1994-01-01

    Personality Assessment Inventory (PAI) profiles of 91 adult female Caucasians were examined to see if significant differences existed between those who reported abuse in childhood or adolescence and those who did not. Significant differences were obtained on several PAI scales and subscales. (SLD)

  9. Substance abuse precedes Internet addiction.

    Science.gov (United States)

    Lee, Young Sik; Han, Doug Hyun; Kim, Sun Mi; Renshaw, Perry F

    2013-04-01

    The purpose of the current study was to evaluate possible overlapping substance abuse and internet addiction in a large, uniformly sampled population, ranging in age from 13 to 18 years. Participants (N=73,238) in the current study were drawn from the 6th Korea Youth Risk Behavior Web-based Survey (KYRBWS-V) for students from 400 middle schools and 400 high schools in 16 cities within South Korea. Of adolescent internet users, 85.2% were general users (GU), 11.9% were users with potential risk for internet addiction (PR), and 3.0% were users with high risk for internet addiction (HR). There was a difference in the number of students with alcohol drinking among the GU, PR, and HR groups (20.8% vs 23.1% vs 27.4%). There was a difference in the number of students who smoked among the GS, PR, and HR groups (11.7% vs 13.5% vs 20.4%). There was a difference in the number of students with drug use among the GU, PR, and HR groups (1.7% vs 2.0% vs 6.5%). After adjusting for sex, age, stress, depressed mood, and suicidal ideation, smoking may predict a high risk for internet addiction (OR=1.203, p=0.004). In addition, drug use may predict a high risk for internet addiction (OR=2.591, pinternet addiction have vulnerability for addictive behaviors, co-morbid substance abuse should be evaluated and, if found, treated in adolescents with internet addiction.

  10. A Unique Betrayal: Clergy Sexual Abuse in the Context of the Catholic Religious Tradition

    Science.gov (United States)

    Guido, Joseph J.

    2008-01-01

    The sexual abuse of children and adolescents by Roman Catholic priests entails a violation of meaning as well as persons. Precisely because the priest is regarded by Catholics as an "alter Christus," another Christ, his violation of a child's or adolescent's body is also a violation of a sacred trust and worldview. The implications of this…

  11. Does Typography of Substance Abuse and Dependence Differ as a Function of Exposure to Child Maltreatment?

    Science.gov (United States)

    Danielson, Carla Kmett; Amstadter, Ananda B.; Dangelmaier, Ruth E.; Resnick, Heidi S.; Saunders, Benjamin E.; Kilpatrick, Dean G.

    2009-01-01

    We investigated the link between child maltreatment, including child sexual assault (CSA) and child physical assault (CPA), and addiction-related symptomatology in a subsample of adolescents from the National Survey of Adolescents, all of whom met DSM-IV criteria for substance abuse or dependence (N = 281). More than 60% of the sample reported a…

  12. Comparative study of runaway electron diffusion in the rise phase of low and normal discharges in the SINP tokamak

    Indian Academy of Sciences (India)

    Ramesh Narayanan; A N Sekar Iyengar

    2010-10-01

    The behaviour of runaway electrons in the SINP tokamak, which can be operated in a normal edge safety factor () (NQ) discharge configuration as well as in a low (LQ) configuration, was experimentally investigated, during the initial plasma generation phase. An energy analysis of the runaway electron dynamics in the rise phase of the SINP tokamak discharges was also made. A comparison of the runaway electron diffusion coefficients in NQ and LQ is carried out in this paper.

  13. Intergenerational Transmission of Maladaptive Parenting Strategies in Families of Adolescent Mothers: Effects from Grandmothers to Young Children.

    Science.gov (United States)

    Seay, Danielle M; Jahromi, Laudan B; Umaña-Taylor, Adriana J; Updegraff, Kimberly A

    2016-08-01

    The current longitudinal study examined the effect of the transmission of maladaptive parenting strategies from grandmothers to adolescent mothers on children's subsequent development. Mexican-origin adolescent mothers (N = 204) participated in home interviews when the adolescent's child (89 boys, 60 girls) was 2, 3, 4, and 5 years old. Grandmothers' psychological control toward the adolescent mother was positively related to adolescents' potential for abuse 1 year later, which was subsequently positively related to adolescents' punitive discipline toward their young child. In addition, adolescent mothers' punitive discipline subsequently predicted greater externalizing problems and less committed compliance among their children. Adolescent mothers' potential for abuse and punitive discipline mediated the effects of grandmothers' psychological control on children's externalizing problems. Finally, adolescent mothers' potential for abuse mediated the effect of grandmothers' psychological control on adolescent mothers' punitive discipline. Results highlight the salience of long-term intergenerational effects of maladaptive parenting on children's behavior.

  14. Examination of the relationship between the duration and frequency of abuse and the trauma symptoms among survivors of sexual abuse

    Directory of Open Access Journals (Sweden)

    Şeref Şimşek

    2014-03-01

    Full Text Available Objective: In this study, we aimed to investigate whether a relationship between the presence and severity of trauma symptoms and duration/frequency of abuse and socio-demographic variables exist or not. Methods: Sixty-five children, aged between 5-17 years, who were admitted to Child and Adolescent Psychiatry Department of Akdeniz University Hospital due to sexual abuse have been enrolled to the study with their mothers. Existing psychopathologies of children were evaluated by Kiddie Schedule for Affective Disorders and Schizophrenia-Lifetime version (K-SADS-PL and PTSD were evaluated by Clinician Administered PTSD Scale for Children and Adolescents (CAPS-CA. For identifying PTSD in their parents Clinician Administered PTSD Scale (CAPS was used. Results: 84.6% of victims (n = 55 were female and15.4% (n = 10 were male. There was no significant relationship between the frequency and duration of abuse and CAPS B, C, and D scores (P> 0.05. Similarly, no significant relationship was present between the frequency and duration of abuse and CAPS B, C, and D scores of the mothers (P> 0.05. In females, age and education level were positively correlated with the CAPS B, C and D scores. Parents' education level was tending to be lower by decreasing age of victimized children. Conclusion: Multiple factors (personal, familial, and pertaining to abuse may play role in the impact of abuse on mental health of survivors of sexual abuse. Education levels of parents seem to be related with both the abuse risk of children and its impact on the child’s mental health after sexual abuse.

  15. Solvent abuse: a review.

    Science.gov (United States)

    Barnes, G E

    1979-01-01

    The literature on solvent abuse is reviewed. Methods of use, symptoms of use, and effects of long-term solvent abuse are discussed. Several surveys on solvent use are summarized. The highest prevalence of solvent abuse seems to occur in native peoples undergoing periods of cultural change. Environmental conditions which are postulated as leading to psychological vulnerability and solvent abuse include: low social assets, parental drug use, peer and sibling influence, and acculturative stress. Solvent abuse seems to provide a pharmacological way out of a stressful environment for people who feel helpless to improve their situation in other ways. Methods of intervention that have been proposed for dealing with solvent abuse are discussed. Methods of intervention thus far employed generally have not been evaluated in any systematic fashion. Suggestions for future research are provided.

  16. Intervention Fidelity in Family-Based Prevention Counseling for Adolescent Problem Behaviors

    Science.gov (United States)

    Hogue, Aaron; Liddle, Howard A.; Singer, Alisa; Leckrone, Jodi

    2005-01-01

    This study examined fidelity in multidimensional family prevention (MDFP), a family-based prevention counseling model for adolescents at high risk for substance abuse and related behavior problems, in comparison to two empirically based treatments for adolescent drug abuse: multidimensional family therapy (MDFT) and cognitive-behavioral therapy…

  17. SUBSTANCE ABUSE IN INDIA

    Directory of Open Access Journals (Sweden)

    Bano Rubeena

    2009-12-01

    Full Text Available The epidemic of substance abuse in young generation has assumed alarming dimensions in India. Changing cultural values, increasing economic stress and dwindling supportive bonds are leading to initiation into substance use. Cannabis, heroin, and Indian-produced pharmaceutical drugs are the most frequently abused drugs in India. Drug use, misuse or abuse is also primarily due to the nature of the drug abused, the personality of the individual and the addict’s immediate environment. The processes of industrialization, urbanization and migration have led to loosening of the traditional methods of social control rendering an individual vulnerable to the stresses and strains of modern life.

  18. Elder Abuse and Neglect

    Directory of Open Access Journals (Sweden)

    Muge Gulen

    2013-06-01

    Full Text Available Abuse and neglect are preventable societal problems that influence elderly individuals physically, spiritually and socially. Elder abuse is neglected for many years and is a growing problem all over the world. The aim of this article is to review the evaluation of elderly individuals who are exposed to abuse and neglect with systematic detailed history and physical examination and to describe individual, familial, and social measures that should be taken to prevent these abuses. [Archives Medical Review Journal 2013; 22(3.000: 393-407

  19. Cough & Cold Medicine Abuse

    Science.gov (United States)

    ... Know Getting Rid of Old Medicines Dealing With Addiction Understanding Medications and What They Do Prescription Drug Abuse Bath Salts Depressants Ketamine MDMA (Ecstasy) Contact Us Print Resources ...

  20. Dating violence victimization across the teen years: Abuse frequency, number of abusive partners, and age at first occurrence

    Directory of Open Access Journals (Sweden)

    Bonomi Amy E

    2012-08-01

    Full Text Available Abstract Background Prior longitudinal studies have shown high cumulative dating violence exposure rates among U.S adolescents, with 36 percent of males and 44 percent to 88 percent of females experiencing victimization across adolescence/young adulthood. Despite promising information characterizing adolescents’ dating violence experiences longitudinally, prior studies tended to concentrate on physical and sexual types of violence only, and did not report information on the number of times dating violence was experienced across multiple abusive partners. We used a method similar to the timeline follow-back interview to query adolescents about dating violence victimization from age 13 to 19—including dating violence types (physical, sexual, and psychological, frequency, age at first occurrence, and number of abusive partners. Methods A total of 730 subjects were randomly sampled from university registrar records and invited to complete an online survey, which utilized methods similar to the timeline follow-back interview, to retrospectively assess relationship histories and dating violence victimization from age 13 to 19 (eight questions adapted from widely-used surveys covering physical, sexual, and psychological abuse. Then, for each dating violence type, we asked about the number of occurrences, number of abusive partners, and age at first occurrence. Of 341 subjects who completed the survey, we included 297 (64 percent females; 36 percent males who had a dating partner from age 13 to 19. Results Fully 64.7 percent of females and 61.7 percent of males reported dating violence victimization between age 13 and 19, with most experiencing multiple occurrences. More than one-third of abused females had two or more abusive partners: controlling behavior (35.6 percent; put downs/name calling (37.0; pressured sex (42.9; insults (44.3; slapped/hit (50.0; and threats (62.5. Males also had two or more abusive partners, as follows: controlling

  1. Inter-machine comparison of the termination phase and energy conversion in tokamak disruptions with runaway current plateau formation and implications for ITER

    Science.gov (United States)

    Martín-Solís, J. R.; Loarte, A.; Hollmann, E. M.; Esposito, B.; Riccardo, V.; FTU; DIII-D Teams; EFDA Contributors, JET

    2014-08-01

    The termination of the current and the loss of runaway electrons following runaway current plateau formation during disruptions have been investigated in the JET, DIII-D and FTU tokamaks. Substantial conversion of magnetic energy into runaway kinetic energy, up to ˜10 times the initial plateau runaway kinetic energy, has been inferred for the slowest current terminations. Both modelling and experiment suggest that, in present devices, the efficiency of conversion into runaway kinetic energy is determined to a great extent by the characteristic runaway loss time, τdiff, and the resistive time of the residual ohmic plasma after the disruption, τres, increasing with the ratio τdiff/τres. It is predicted that, in large future devices such as ITER, the generation of runaways by the avalanche mechanism will play an important role, particularly for slow runaway discharge terminations, increasing substantially the amount of energy deposited by the runaways onto the plasma-facing components by the conversion of magnetic energy of the runaway plasma into runaway kinetic energy. Estimates of the power fluxes on the beryllium plasma-facing components during runaway termination in ITER indicate that for runaway currents of up to 2 MA no melting of the components is expected. For larger runaway currents, minimization of the effects of runaway impact on the first wall requires a reduction in the kinetic energy of the runaway beam before termination and, in addition, high plasma density ne and low ohmic plasma resistance (long τres) to prevent large conversion of magnetic into runaway kinetic energy during slow current terminations.

  2. Childhood Predictors of Adult Substance Abuse.

    Science.gov (United States)

    Arteaga, Irma; Chen, Chin-Chih; Reynolds, Arthur J

    2010-08-01

    Identification of the early determinants of substance abuse is a major focus of life course research. In this study, we investigated the child, family, and school-related antecedents of the onset and prevalence of substance abuse by age 26 for a cohort of 1,208 low-income minority children in the Chicago Longitudinal Study. Data onon well-being have been collected prospectively since birth from administrative records, parents, teachers, and children. Results indicated that the prevalence of substance abuse by age 26 was 32 percent (self reports or criminal justice system records) with a median age of first use of 17. Probit regression analysis indicated that substance abuse prevalence was primarily determined by gender (males had a higher rate), trouble making behavior by age 12, school mobility, and previous substance use. Family and peer predictors included involvement in the child welfare system by age 9, parent expectations for school success at age 9, parent substance abuse by children's age 15, and deviant peer affiliation by age 16. Age of first substance use was predicted by gender and race/ethnicity (males and Blacks had earlier incidence), involvement in the child welfare system, and family risk status at age 8. As with prevalence, the pattern of predictors for males was similar to the overall sample but the magnitude of effects was stronger.. The predictors of the timing of substance use dependency were gender, family conflict by age 5, involvement in the child welfare system, social maturity at age 9, adolescent school mobility, and school dropout by age 16. Findings indicate that the promotion of family involvement and positive school and social behavior can reduce the risk of substance abuse.

  3. Adolescent and Young Adult Male Sex Offenders: Understanding the Role of Recidivism

    Science.gov (United States)

    Riser, Diana K.; Pegram, Sheri E.; Farley, Julee P.

    2013-01-01

    The current review explores the complex paths that can lead to adolescent and young adult males becoming sexually abusive. Because sexual abuse is an ongoing issue in our society that is often oversimplified, this article distinguishes between the various risk factors that predict sexually abusive behavior and types of sex offenders, particularly…

  4. Child Abuse: The Hidden Bruises

    Science.gov (United States)

    ... 5; Updated November 2014 The statistics on physical child abuse are alarming. It is estimated hundreds of thousands ... Physical abuse is not the only kind of child abuse. Many children are also victims of neglect, or ...

  5. The moderating effect of monoamine oxidase A gene polymorphism in relationship between childhood abuse of male adolescents and externalizing behaviors%单胺氧化酶A基因多态性对男性青少年儿童期虐待与外化性行为关系的调节效应

    Institute of Scientific and Technical Information of China (English)

    明庆森; 姚树桥; 张芸; 陈海燕

    2012-01-01

    Objective To explore the relationship between male adolescents' childhood abuse and externalizing behaviors,and the moderating effect of monoamine oxidase A (MAOA) gene promoter region variable number tandem repeat (VNTR) polymorphism.Methods Through random cluster sampling,352 Han male middle school students from Changsha were tested by Achenbach child behavior checklist-youth self reports (CBCL-YSR)and childhood trauma questionnaire-28 item short form (CTQ-SF),their MAOA genotypes were also identified.A hierarchical multiple regression analysis was used to test the moderating effect.Results ( 1 ) Compared participates with high activity MAOA gene and that with low activity MAOA gene,there were no significant differences on age ( ( 15.82 ± 1.52) vs ( 15.94 ± 1.62 ) ),externalizing behaviors ( ( 15.13 ± 10.14 ) vs ( 14.33 ± 9.70 ) ),total abuse ( (52.59 ± 10.46) vs (51.39 ± 7.56 ) ),emotional abuse( ( 7.63 ± 3.31 ) vs ( 7.11 ± 2.68 ) ),physical abuse ( ( 6.40 ± 2.82) vs (6.12 ± 2.05 ) ),sexual abuse ( ( 6.42 ± 3.24 ) vs ( 5.94 ± 1.72 ) ),emotional neglect ((13.44±5.12) vs (13.16 ±4.83) ),physical neglect( (10.27 ±2.64) vs (10.44±2.53))(t=-1.789~0.678,P > 0.05 ).(2)Except emotional neglect and physical neglect,emotional abuse,physical abuse and sexual abuse could predict externalizing behaviors( Sβ =0.141 ~0.347,P < 0.01 ).(3) MAOA gene was not directly related to externalizing behaviors( Sβ =- 0.023,P > 0.05 ).There was a significant interaction between MAOA gene and emotional abuse( Sβ =-0.148,P < 0.01 ).The interaction between MAOA gene and physical abuse or sexual abuse showed no statistical significance( Sβ =- 0.067,- 0.005,P > 0.05 ).Conclusion MAOA gene polymorphism can moderate the relationship between male adolescents'childhood emotional abuse and externalizing behaviors.%目的 探讨男性青少年的儿童期虐待与外化性行为的关系以及单胺氧化酶A (MAOA)基因启动子区域可变重复序列(VNTR)多态

  6. Largest Particle Simulations Downgrade the Runaway Electron Risk for ITER

    CERN Document Server

    Liu, Jian; Wang, Yulei; Yang, Guangwen; Zheng, Jiangshan; Yao, Yicun; Zheng, Yifeng; Liu, Zhao; Liu, Xin

    2016-01-01

    Fusion energy will be the ultimate clean energy source for mankind. One of the most visible concerns of the future fusion device is the threat of deleterious runaway electrons (REs) produced during unexpected disruptions of the fusion plasma. Both efficient long-term algorithms and super-large scale computing power are necessary to reveal the complex dynamics of REs in a realistic fusion reactor. In the present study, we deploy the world's fastest supercomputer, Sunway TaihuLight, and the newly developed relativistic volume-preserving algorithm to carry out long-term particle simulations of 10^7 sampled REs in 6D phase space, which involves simulation scale of 10^18 particle-steps, the largest ever achieved in fusion research. Our simulations show that in a realistic fusion reactor, the concern of REs is not as serious as previously thought. Specifically, REs are confined much better than previously predicted and the maximum average energy is in the range of 150MeV, less than half of previous estimate.

  7. Asymmetric supernova remnants generated by Galactic, massive runaway stars

    CERN Document Server

    Meyer, D M -A; Mackey, J; Velazquez, P F; Gusdorf, A

    2015-01-01

    After the death of a runaway massive star, its supernova shock wave interacts with the bow shocks produced by its defunct progenitor, and may lose energy, momentum, and its spherical symmetry before expanding into the local interstellar medium (ISM). We investigate whether the initial mass and space velocity of these progenitors can be associated with asymmetric supernova remnants. We run hydrodynamical models of supernovae exploding in the pre-shaped medium of moving Galactic core-collapse progenitors. We find that bow shocks that accumulate more than about 1.5 Mo generate asymmetric remnants. The shock wave first collides with these bow shocks 160-750 yr after the supernova, and the collision lasts until 830-4900 yr. The shock wave is then located 1.35-5 pc from the center of the explosion, and it expands freely into the ISM, whereas in the opposite direction it is channelled into the region of undisturbed wind material. This applies to an initially 20 Mo progenitor moving with velocity 20 km/s and to our i...

  8. Runaway M Dwarf Candidates from the Sloan Digital Sky Survey

    CERN Document Server

    Favia, Andrej; Theissen, Christopher A

    2015-01-01

    We present a sample of 20 runaway M dwarf candidates (RdMs) within 1 kpc of the Sun whose Galactocentric velocities exceed 400 km s$^{-1}$. The candidates were selected from the SDSS DR7 M Dwarf Catalog of West et al. (2011). Our RdMs have SDSS+USNO-B proper motions that are consistent with those recorded in the PPMXL, LSPM, and combined WISE+SDSS+2MASS catalogs. Sixteen RdMs are classified as dwarfs, while the remaining four RdMs are subdwarfs. We model the Galactic potential using a bulge-disk-halo profile (Kenyon et al. 2008; Brown et al. 2014). Our fastest RdM, with Galactocentric velocity 658.5 $\\pm$ 236.9 km s$^{-1}$, is a possible hypervelocity candidate, as it is unbound in 77% of our simulations. About half of our RdMs have kinematics that are consistent with ejection from the Galactic center. Seven of our RdMs have kinematics consistent with an ejection scenario from M31 or M32 to within 2{\\sigma}, although our distance-limited survey makes such a realization unlikely. No more than four of our RdMs ...

  9. ADELE: an Airborne Instrument to Detect Relativistic Runaway

    Science.gov (United States)

    Hazelton, B. J.; Grefenstette, B. W.; Smith, D. M.; Dwyer, J. R.

    2006-12-01

    The Airborne Detector for Energetic Lightning Emissions (ADELE) is an instrument currently under development to detect x-ray and gamma-ray emissions from thunderstorms. Phenomena of interest include terrestrial gamma-ray flashes (TGFs), hard x-ray bursts from lightning leaders, and minute-scale changes in the gamma-ray background due to gradual relativistic runaway. ADELE will be mounted in research aircraft such as the NSF/NCAR Gulfstream V operated under the HIAPER program. Missions will be flown directly above low thunderstorms and to the sides of taller thunderstorms to observe lightning-related phenomena near their origin. The ADELE detectors will be designed to maximize dynamic range, with large-area detectors for faint events and extremely fast detectors and electronics to prevent saturation during nearby events with high count rates. The goal is to capture thousands of gammas per TGF as opposed to the dozens captured by detectors in orbit. A flat-plate antenna will measure fast electric-field transients simultaneously. Campaigns will be carried out in the Great Plains, Florida, and the Caribbean beginning in 2009. We are seeking collaborators to make simultaneous observations of radio atmospherics, transient luminous events, and other electrical phenomena during these campaigns.

  10. TYC 3159-6-1: a runaway blue supergiant

    Science.gov (United States)

    Gvaramadze, V. V.; Miroshnichenko, A. S.; Castro, N.; Langer, N.; Zharikov, S. V.

    2014-01-01

    We report the results of optical spectroscopy of a candidate evolved massive star in the Cygnus-X region, TYC 3159-6-1, revealed via detection of its curious circumstellar nebula in archival data of the Spitzer Space Telescope. We classify TYC 3159-6-1 as an O9.5-O9.7 Ib star and derive its fundamental parameters by using the stellar atmosphere code FASTWIND. The He and CNO abundances in the photosphere of TYC 3159-6-1 are consistent with the solar abundances, suggesting that the star only recently evolved off the main sequence. Proper motion and radial velocity measurements for TYC 3159-6-1 show that it is a runaway star. We propose that Dolidze 7 is its parent cluster. We discuss the origin of the nebula around TYC 3159-6-1 and suggest that it might be produced in several successive episodes of enhanced mass-loss rate (outbursts) caused by rotation of the star near the critical Ω limit.

  11. TYC 3159-6-1: a runaway blue supergiant

    CERN Document Server

    Gvaramadze, V V; Castro, N; Langer, N; Zharikov, S V

    2013-01-01

    We report the results of optical spectroscopy of a candidate evolved massive star in the Cygnus X region, TYC 3159-6-1, revealed via detection of its curious circumstellar nebula in archival data of the Spitzer Space Telecope. We classify TYC 3159-6-1 as an O9.5-O9.7 Ib star and derive its fundamental parameters by using the stellar atmosphere code FASTWIND. The He and CNO abundances in the photosphere of TYC 3159-6-1 are consistent with the solar abundances, suggesting that the star only recently evolved off the main sequence. Proper motion and radial velocity measurements for TYC 3159-6-1 show that it is a runaway star. We propose that Dolidze 7 is its parent cluster. We discuss the origin of the nebula around TYC 3159-6-1 and suggest that it might be produced in several successive episodes of enhanced mass-loss rate (outbursts) caused by rotation of the star near the critical, \\Omega-limit.

  12. The Maximal Runaway Temperature of Earth-like Planets

    CERN Document Server

    Shaviv, Nir J; Wehrse, Rainer

    2012-01-01

    We generalize the problem of the semi-gray model to cases in which a non-negligible fraction of the stellar radiation falls on the long-wavelength range, and/or that the planetary long-wavelength emission penetrates into the transparent short wavelength domain of the absorption. Second, applying the most general assumptions and independently of any particular properties of an absorber, we show that the greenhouse effect saturates and any Earth-like planet has a maximal temperature which depends on the type of and distance to its main-sequence star, its albedo and the primary atmospheric components which determine the cutoff frequency below which the atmosphere is optically thick. For example, a hypothetical convection-less planet similar to Venus, that is optically thin in the visible, could have at most a surface temperature of 1200-1300K irrespective of the nature of the greenhouse gas. We show that two primary mechanisms are responsible for the saturation of the runaway greenhouse effect, depending on the ...

  13. Evolution of Gas Giant Entropy During Formation by Runaway Accretion

    CERN Document Server

    Berardo, David; Marleau, Gabriel-Dominique

    2016-01-01

    We calculate the evolution of gas giant planets during the runaway gas accretion phase of formation, to understand how the luminosity of young giant planets depends on the accretion conditions. We construct steady-state envelope models, and run time-dependent simulations of accreting planets with the Modules for Experiments in Stellar Astrophysics (MESA) code. We show that the evolution of the internal entropy depends on the contrast between the internal adiabat and the entropy of the accreted material, parametrized by the shock temperature $T_0$ and pressure $P_0$. At low temperatures ($T_0\\lesssim 300$--$1000\\ {\\rm K}$, depending on model parameters), the accreted material has a lower entropy than the interior. The convection zone extends to the surface and can drive a large luminosity, leading to rapid cooling and cold starts. For higher temperatures, the accreted material has a larger entropy than the interior, giving a radiative zone that stalls cooling. For $T_0\\gtrsim 2000\\ {\\rm K}$, the surface--inter...

  14. Baryogenesis and gravitational waves from runaway bubble collisions

    Energy Technology Data Exchange (ETDEWEB)

    Katz, Andrey [Theory Division, CERN,CH-1211 Geneva 23 (Switzerland); Département de Physique Théorique and Center for Astroparticle Physics (CAP),Université de Genève, 24 quai Ansermet, CH-1211 Genève 4 (Switzerland); Riotto, Antonio [Département de Physique Théorique and Center for Astroparticle Physics (CAP),Université de Genève, 24 quai Ansermet, CH-1211 Genève 4 (Switzerland)

    2016-11-07

    We propose a novel mechanism for production of baryonic asymmetry in the early Universe. The mechanism takes advantage of the strong first order phase transition that produces runaway bubbles in the hidden sector that propagate almost without friction with ultra-relativistic velocities. Collisions of such bubbles can non-thermally produce heavy particles that further decay out-of-equilibrium into the SM and produce the observed baryonic asymmetry. This process can proceed at the very low temperatures, providing a new mechanism of post-sphaleron baryogenesis. In this paper we present a fully calculable model which produces the baryonic asymmetry along these lines as well as evades all the existing cosmological constraints. We emphasize that the Gravitational Waves signal from the first order phase transition is completely generic and can potentially be detected by the future eLISA interferometer. We also discuss other potential signals, which are more model dependent, and point out the unresolved theoretical questions related to our proposal.

  15. Child sexual abuse.

    Science.gov (United States)

    Hymel, K P; Jenny, C

    1997-08-01

    Multiple obstacles can hinder the medical evaluation of suspected child sexual abuse in pediatric primary care. The need for diagnostic accuracy is high. Knowledge of sexual abuse risk factors, an understanding of the victimization process, and awareness of the varied clinical presentations of sexual abuse can be of assistance. Open-ended questioning of the suspected victim is the most critical component of the evaluation. Skillful medical interviewing requires time, training, patience, and practice. Pediatricians lacking any of these four requirements should defer interviewing in sexual abuse cases to other professionals. Abnormal physical findings from sexual abuse are uncommon. Colposcopy has assisted pediatricians greatly in reaching consensus regarding diagnostic physical findings. Cases of acute sexual assault require familiarity with the forensic rape examination, STD screening and prophylaxis, and pregnancy prevention. Victimization from sexual abuse continues long after the abusive acts end, often requiring long-term therapeutic intervention. An emerging standard of care for medical evaluations of suspected child sexual abuse recognizes the requirement for patience and compassion while retaining objectivity. The pediatrician's primary concern must be for the child's physical and emotional well-being.

  16. The Link: Trauma and Substance Abuse

    Directory of Open Access Journals (Sweden)

    Leslie Dawn Culpepper

    2016-03-01

    Full Text Available Trauma “is categorized as an overwhelming life-changing experience (and is typically a physical and/or emotional shock to the very fiber of one’s being.”It is a priority that those who experience trauma in their lives seek help from a licensed professional to deal with the emotional damage caused by the trauma(s and to be taught necessary coping skills to prevent them from seeking solace in unhealthy ways like abusing drugs and/or alcohol. Research proposes that all types of trauma and the aftermath that follows will likely impact the “exposed population’s behavioral health, resulting in an increase in mental and substance use disorders, along with a decline in perceived quality of life” [1]. Survey results teach us that more than 70% adolescents receiving treatment for substance abuse across the country have a history of trauma in their lives.

  17. The Runaway Greenhouse: implications for future climate change, geoengineering and planetary atmospheres

    CERN Document Server

    Goldblatt, Colin

    2012-01-01

    The ultimate climate emergency is a "runaway greenhouse": a hot and water vapour rich atmosphere limits the emission of thermal radiation to space, causing runaway warming. Warming ceases only once the surface reaches ~1400K and emits radiation in the near-infrared, where water is not a good greenhouse gas. This would evaporate the entire ocean and exterminate all planetary life. Venus experienced a runaway greenhouse in the past, and we expect that Earth will in around 2 billion years as solar luminosity increases. But could we bring on such a catastrophe prematurely, by our current climate-altering activities? Here we review what is known about the runaway greenhouse to answer this question, describing the various limits on outgoing radiation and how climate will evolve between these. The good news is that almost all lines of evidence lead us to believe that is unlikely to be possible, even in principle, to trigger full a runaway greenhouse by addition of non-condensible greenhouse gases such as carbon diox...

  18. Bounce-averaged Fokker-Planck Simulation of Runaway Avalanche from Secondary Knock-on Production

    Science.gov (United States)

    Chiu, S. C.; Chan, V. S.; Harvey, R. W.; Rosenbluth, M. N.

    1996-11-01

    It has been pointed out that secondary production of runaway electrons by knock-on collisions with very energetic confined electrons can significantly change the runaway rate,(M.N. Rosenbluth, Bull. Amer. Phys. Soc. 40), 1804 (1995).^,(N.T. Besedin, I.M. Pankratov, Nucl. Fusion 26), 807 (1986).^,(R. Jaspers, K.H. Finden, G. Mank et al.), Nucl. Fusion 33, 1775 (1993). and is potentially a serious problem in reactors. Previous calculations of the effect have only partially included important effects such as toroidal trapping, synchrotron radiation, and bremsstrahlung. Furthermore, in a normal constant current operation, the increase of the density of runaway electrons causes a decrease of the ohmic field and all these effects can balance to a steady-state. The purpose of the present paper is to present results on bounce-averaged Fokker-Planck simulations of knock-on avalanching runaways including these effects. Initially, an energetic seed component is inserted to initiate knock-on avalanching. Results on the dependence of the steady-state runaway current on Z_eff, density, and radial location will be presented.

  19. Abuse Potential of Pregabalin

    DEFF Research Database (Denmark)

    Schjerning, Ole; Rosenzweig, Mary; Pottegård, Anton

    2016-01-01

    BACKGROUND: Several case reports and epidemiological studies have raised concern about the abuse potential of pregabalin, the use of which has increased substantially over the last decade. Pregabalin is, in some cases, used for recreational purposes and it has incurred attention among drug abusers...... for causing euphoric and dissociative effects when taken in doses exceeding normal therapeutic dosages or used by alternative routes of administration, such as nasal insufflation or venous injection. The magnitude of the abuse potential and the mechanism behind it are not fully known. OBJECTIVE: The aim...... of this study was to present a systematic review of the data concerning the abuse potential of pregabalin. METHODS: We performed a systematic literature search and reviewed the preclinical, clinical and epidemiological data on the abuse potential of pregabalin. RESULTS: We included preclinical (n = 17...

  20. Children and animal abuse: Criminological, victimological and criminal justice aspects

    Directory of Open Access Journals (Sweden)

    Batrićević Ana

    2011-01-01

    Full Text Available Animal abuse represents a complex social, psychological, criminological, victimological and legal phenomenon whose gravity is increased if a child appears either as the perpetrator or as the observer of violence against animals. Etiology and phenomenology of animal abuse suggest that it tends to overlap with various deviant, delinquent and criminal activities, including physical, emotional and sexual abuse of family or other community members, alcohol and drug abuse, illegal gambling and betting and membership of children and adolescents in street gangs. The author discusses fundamental reasons, causes and motives for animal abuse committed by children as well as the devastating impact of children’s exposure to the scenes of animal abuse on their future delinquent behavior. She emphasizes the link between animal abuse and family violence and analyzes the position of a child as a direct or indirect victim in such situations. In addition, the author estimates the efficiency of existing mechanisms of prevention and state reaction to such behaviours and suggests solutions, which are accepted in comparative law, as potential role models.

  1. Dimensions of Child Sexual Abuse before Age 15 in Three Central American Countries: Honduras, El Salvador, and Guatemala

    Science.gov (United States)

    Speizer, Ilene S.; Goodwin, Mary; Whittle, Lisa; Clyde, Maureen; Rogers, Jennifer

    2008-01-01

    Objective: The prevalence of sexual abuse during childhood or adolescence varies depending on the definitions and age categories used. This study examines the first national, population-based data available on child sexual abuse that occurs before age 15 in three countries: El Salvador, Guatemala, and Honduras. This study uses comparable…

  2. Adolescent development

    Science.gov (United States)

    Development - adolescent; Growth and development - adolescent ... During adolescence, children develop the ability to: Understand abstract ideas. These include grasping higher math concepts, and developing moral ...

  3. Increased insolation threshold for runaway greenhouse processes on Earth like planets

    CERN Document Server

    Leconte, Jérémy; Charnay, Benjamin; Wordsworth, Robin; Pottier, Alizée

    2013-01-01

    Because the solar luminosity increases over geological timescales, Earth climate is expected to warm, increasing water evaporation which, in turn, enhances the atmospheric greenhouse effect. Above a certain critical insolation, this destabilizing greenhouse feedback can "runaway" until all the oceans are evaporated. Through increases in stratospheric humidity, warming may also cause oceans to escape to space before the runaway greenhouse occurs. The critical insolation thresholds for these processes, however, remain uncertain because they have so far been evaluated with unidimensional models that cannot account for the dynamical and cloud feedback effects that are key stabilizing features of Earth's climate. Here we use a 3D global climate model to show that the threshold for the runaway greenhouse is about 375 W/m$^2$, significantly higher than previously thought. Our model is specifically developed to quantify the climate response of Earth-like planets to increased insolation in hot and extremely moist atmo...

  4. A Thermal Runaway Simulation on a Lithium Titanate Battery and the Battery Module

    Directory of Open Access Journals (Sweden)

    Man Chen

    2015-01-01

    Full Text Available Based on the electrochemical and thermal model, a coupled electro-thermal runaway model was developed and implemented using finite element methods. The thermal decomposition reactions when the battery temperature exceeds the material decomposition temperature were embedded into the model. The temperature variations of a lithium titanate battery during a series of charge-discharge cycles under different current rates were simulated. The results of temperature and heat generation rate demonstrate that the greater the current, the faster the battery temperature is rising. Furthermore, the thermal influence of the overheated cell on surrounding batteries in the module was simulated, and the variation of temperature and heat generation during thermal runaway was obtained. It was found that the overheated cell can induce thermal runaway in other adjacent cells within 3 mm distance in the battery module if the accumulated heat is not dissipated rapidly.

  5. Runaway electron generation during disruptions in the J-TEXT tokamak

    Science.gov (United States)

    Zeng, L.; Chen, Z. Y.; Dong, Y. B.; Koslowski, H. R.; Liang, Y.; Zhang, Y. P.; Zhuang, H. D.; Huang, D. W.; Gao, X.

    2017-04-01

    A systematic study of disruption-generated runaway electrons has been performed in the J-TEXT tokamak. During the intended disruption by the argon injection in J-TEXT, the runaway electron plateau is more easily obtained with a higher loop voltage and shorter onset time of high loop voltage. Magnetic fluctuations are observed at the beginning of the current quench during the disruptions. The generated runaway electron (RE) current is larger at a lower level of magnetic fluctuation. Experimental evidence supporting that the theory of hot tail RE generation might be playing a role has also been found. With higher temperature before the disruption, more REs are generated via the hot tail mechanism during the thermal quench. By increasing the hot tail RE generation by increasing the temperature, an obvious RE plateau is observed even with a low toroidal magnetic field (1.2 T).

  6. Runaway Criterion in Fixed Bed Catalytic Reactors with Radial Temperature Profile

    Institute of Scientific and Technical Information of China (English)

    吴鹏; 樊勇; 李绍芬

    1999-01-01

    The discrepancy between pseudo-homogeneous one-dimensional model and peeudo-homogeneous two-dimensional model is studied. It is found that there are great differences between two models. This paper compares the maximum and minimum values of the radial temperature in the hot spot in came that a single exothermic reaction is carried out, a correlation is obtlioed with peeudo-homogeneous one-dimensional model to describe the entire reactor behavier. A new runaway criterion, based on the occurrence of inflection in the hot spot locus, is developed for the case of pseudo-homogeneous two-dimensional model. This criterion predicts the maximum allowable temperature for safe operation and the regions of runaway, respectively. The calculated results show that, compared with the results based on pseudo-homogeneous one-dimensional model, runaway will easily occur when the radial temperature gradient has to be considered.

  7. High performance gamma-ray spectrometer for runaway electron studies on the FT-2 tokamak

    Science.gov (United States)

    Shevelev, A. E.; Khilkevitch, E. M.; Lashkul, S. I.; Rozhdestvensky, V. V.; Altukhov, A. B.; Chugunov, I. N.; Doinikov, D. N.; Esipov, L. A.; Gin, D. B.; Iliasova, M. V.; Naidenov, V. O.; Nersesyan, N. S.; Polunovsky, I. A.; Sidorov, A. V.; Kiptily, V. G.

    2016-09-01

    A gamma-ray spectrometer based on LaBr3(Ce) scintillator has been used for measurements of hard X-ray emission generated by runaway electrons in the FT-2 tokamak plasmas. Using of the fast LaBr3(Ce) has allowed extending count rate range of the spectrometer by a factor of 10. A developed digital processing algorithm of the detector signal recorded with a digitizer sampling rate of 250 MHz has provided a pulse height analysis at count rates up to 107 s-1. A spectrum deconvolution code DeGaSum has been applied for inferring the energy distribution of runaway electrons escaping from the plasma and interacting with materials of the FT-2 limiter in the vacuum chamber. The developed digital signal processing technique for LaBr3(Ce) spectrometer has allowed studying the evolution of runaways energy distribution in the FT-2 plasma discharges with time resolution of 1-5 ms.

  8. Numerical study of the generation of runaway electrons in a gas diode with a hot channel

    Energy Technology Data Exchange (ETDEWEB)

    Lisenkov, V. V., E-mail: lisenkov@iep.uran.ru [Institute of Electrophysics UrB RAS, 106 Amundsena St., Ekaterinburg 620012 (Russian Federation); Ural Federal University, 19 Mira St., Ekaterinburg 620002 (Russian Federation); Shklyaev, V. A., E-mail: shklyaev@to.hcei.tsc.ru [Institute of High Current Electronics SD RAS, 2/3 Akademichesky Avenue, 634055 Tomsk (Russian Federation); National Research Tomsk Polytechnic University, 30 Lenin Avenue, 634050 Tomsk (Russian Federation)

    2015-11-15

    A new method for increasing the efficiency of runaway electron beam generation in atmospheric pressure gas media has been suggested and theoretically proved. The method consists of creating a hot region (e.g., a spark channel or a laser plume) with a decreased numerical density of gas molecules (N) near the cathode. In this method, the ratio E/N (E—electric field strength) is increased by decreasing N instead of increasing E, as has been done in the past. The numerical model that is used allows the simultaneous calculation of the formation of a subnanosecond gas discharge and the generation of runaway electrons in gas media. The calculations have demonstrated the possibility of obtaining current pulses of runaway electrons with amplitudes of hundred of amperes and durations of more than 100 ps. The influence of the hot channel geometry on the parameters of the generated beam has been investigated.

  9. Predicted space motions for hypervelocity and runaway stars: proper motions and radial velocities for the Gaia Era

    Energy Technology Data Exchange (ETDEWEB)

    Kenyon, Scott J.; Brown, Warren R.; Geller, Margaret J. [Smithsonian Astrophysical Observatory, 60 Garden Street, Cambridge, MA 02138 (United States); Bromley, Benjamin C., E-mail: skenyon@cfa.harvard.edu, E-mail: wbrown@cfa.harvard.edu, E-mail: mgeller@cfa.harvard.edu, E-mail: bromley@physics.utah.edu [Department of Physics, University of Utah, 115 S 1400 E, Rm 201, Salt Lake City, UT 84112 (United States)

    2014-10-01

    We predict the distinctive three-dimensional space motions of hypervelocity stars (HVSs) and runaway stars moving in a realistic Galactic potential. For nearby stars with distances less than 10 kpc, unbound stars are rare; proper motions alone rarely isolate bound HVSs and runaways from indigenous halo stars. At large distances of 20-100 kpc, unbound HVSs are much more common than runaways; radial velocities easily distinguish both from indigenous halo stars. Comparisons of the predictions with existing observations are encouraging. Although the models fail to match observations of solar-type HVS candidates from SEGUE, they agree well with data for B-type HVS and runaways from other surveys. Complete samples of g ≲ 20 stars with Gaia should provide clear tests of formation models for HVSs and runaways and will enable accurate probes of the shape of the Galactic potential.

  10. A kinetic model for runaway electrons in the ionosphere

    Directory of Open Access Journals (Sweden)

    G. Garcia

    2006-09-01

    Full Text Available Electrodynamic models and measurements with satellites and incoherent scatter radars predict large field aligned current densities on one side of the auroral arcs. Different authors and different kinds of studies (experimental or modeling agree that the current density can reach up to hundreds of µA/m2. This large current density could be the cause of many phenomena such as tall red rays or triggering of unstable ion acoustic waves. In the present paper, we consider the issue of electrons moving through an ionospheric gas of positive ions and neutrals under the influence of a static electric field. We develop a kinetic model of collisions including electrons/electrons, electrons/ions and electrons/neutrals collisions. We use a Fokker-Planck approach to describe binary collisions between charged particles with a long-range interaction. We present the essential elements of this collision operator: the Langevin equation for electrons/ions and electrons/electrons collisions and the Monte-Carlo and null collision methods for electrons/neutrals collisions. A computational example is given illustrating the approach to equilibrium and the impact of the different terms (electrons/electrons and electrons/ions collisions on the one hand and electrons/neutrals collisions on the other hand. Then, a parallel electric field is applied in a new sample run. In this run, the electrons move in the z direction parallel to the electric field. The first results show that all the electron distribution functions are non-Maxwellian. Furthermore, runaway electrons can carry a significant part of the total current density, up to 20% of the total current density.

  11. Cognitive Behavioral Interventions with Maltreated Children and Adolescents.

    Science.gov (United States)

    Verduyn, Chrissie; Calam, Rachel

    1999-01-01

    Discussion of cognitive behavioral interventions with abused children and adolescents covers use of cognitive therapy with adults, therapeutic processes in cognitive therapy, involvement of parents and carers in cognitive behavioral therapy, and cognitive schema and maltreatment. Application is made to types of abuse (physical, emotional, sexual)…

  12. Encountering Child Abuse at Camp.

    Science.gov (United States)

    Durall, John K.

    1997-01-01

    Defines child abuse, including the three categories: physical, sexual, and psychological. Presents characteristics and behaviors of each type of abuse, and long-term effects. Discusses how to handle abuse that occurs at camp, and the effects on the camp. Sidebars present abuse statistics, 15 activities that promote psychological wellness, and 8…

  13. Child Abuse and Mandated Reporting

    Science.gov (United States)

    Woika, Shirley; Bowersox, Carissa

    2013-01-01

    Teachers and teachers-in-training are mandated reporters; they are legally required to report any suspected child abuse or neglect. This article describes: (1) How to file a report; (2) How prevalent child abuse is; (3) What abuse is; (4) What it means to be a mandated reporter; (5) When the report should be made; and (6) What to do if abuse is…

  14. Prevalence and characteristics of sexual abuse in a national sample of Swedish seventeen-year-old boys and girls.

    Science.gov (United States)

    Edgardh, K; Ormstad, K

    2000-03-01

    The aims of this study, which was part of a survey on adolescent sexual behaviour, were to investigate adolescents' experience of child sexual abuse and to present possible abuse-related problems. Representative samples of 2% of Sweden's 17-y-old male and female students and school non-attenders were selected in a two-step procedure. In all, 1943 students and 210 school non-attenders answered a self-administered anonymous questionnaire, distributed by school nurses. Six out of 170 questions dealt with personal experiences of child sexual abuse, i.e. age at onset, frequency of abuse and relationship to the offender. Peer abuse was excluded by the definitions used. The overall response rate was 92.2% for students and 44.2% for school dropouts. Among male and female students, 3.1% and 11.2%, respectively, acknowledged sexual abuse, 2.3% and 7.1%, respectively, when exhibitionism was excluded. Mean age at onset was 9.1 y (SD 4.3) for boys and 9.0 y (SD 3.9) for girls; 1.2% of the boys and 3.1% of the girls reported abusive oral, vaginal and/or anal intercourse. Suicide attempts or other acts of self-harm were reported by 33.3% of the male students reporting abuse and by 5.1% (p student girls compared to 9.1% of the non-abused (p student boys). Of school non-attenders, 4% of the boys and 28% of the girls reported sexual abuse. Of the abused girls, 49% reported abusive vaginal intercourse and 64% reported self-destructive behaviour or suicide attempts. No abused boys and few abused girls had confided in a teacher, health professional or social worker. Results from the student sample should be interpreted as markers of "minimum prevalence", as female school non-attenders report significantly higher prevalence of sexual abuse. Potential high-risk groups are better included in prevalence investigations of child sexual abuse. The fact that so few adolescents confided in "professionals" about the abuse, despite having severe symptoms and signs of distress, underlines the need

  15. Runaway Electron Beam Instability in Slide-Away Discharges in the HT-7 Tokamak

    Institute of Scientific and Technical Information of China (English)

    CHEN Zhong-Yong; WAN Bao-Nian; LING Bi-Li; GAO Xiang; DU Qin; TI Ang; LIN Shi-Yao; S. Sajjad; HT-7 Team

    2007-01-01

    Slide-away discharges are achieved by decreasing the plasma density or ramping down the plasma current in runaway discharges in the HT-7 tokamak. In the case of plasma current ramp down, the ratio of the electron plasma frequency to the electron cyclotron frequency is higher than in the stationary pulses when the discharge goes into a slide-away regime. The instability regime is characterized by relaxations in the electron cyclotron emission due to relativistic anomalous Doppler effect which transfers energy from parallel to perpendicular motion. The triggering of relativistic anomalous Doppler effect at higher density by ramping down of plasma current may provide a alternative runaway energy control scenario.

  16. Measurement of the internal magnetic fluctuation by the transport of runaways on J-TEXT

    Science.gov (United States)

    Chen, Z. Y.; Huang, D. W.; Tong, R. H.; Yan, W.; Wei, Y. N.; Ma, T. K.; Jiang, Z. H.; Zhang, X. Q.; Chen, Z. P.; Yang, Z. J.; Zhuang, G.

    2016-11-01

    The measurement of internal magnetic fluctuation is important for the study of transport in tokamak plasmas. The runaway electron transport induced by the sawtooth crash can be used to obtain the internal magnetic fluctuation. Inversed sawtooth-like activities on hard x-ray (HXR) fluxes following sawtooth activities were observed after the application of electrode biasing on J-TEXT tokamak. The runaway diffusion coefficient Dr is deduced to be about 30 m2/s according to the time delay of HXR flux peaks to the sawtooth crashes. The averaged value of normalized magnetic fluctuation in the discharges with electrode biasing was increased to the order of 1 × 10-4.

  17. Islands of runaway electrons in the TEXTOR tokamak and relation to transport in a stochastic field

    Energy Technology Data Exchange (ETDEWEB)

    Jaspers, R.; Lopes Cardozo, N.J.; Finken, K.H.; Schokker, B.C.; Mank, G.; Fuchs, G.; Schueller, F.C. (FOM-Instituut voor Plasmafysica Rijnhuizen,' ' P.O. Box 1207, 3402 BE Nieuwegein (Netherlands) Institut fuer Plasmaphysik, Forschungszentrum Juelich, D-52425 Juelich (Germany))

    1994-06-27

    A population of 30 MeV runaway electrons in the TEXTOR tokamak is diagnosed by their synchrotron emission. During pellet injection a large fraction of the population is lost within 600 [mu]s. This rapid loss is attributed to stochastization of the magnetic field. The remaining runaways form a narrow, helical beam at the [ital q]=1 drift surface. The radial and poloidal diffusion of this beam is extremely slow, [ital D][lt]0.02 m[sup 2]/s. The fact that the beam survives the period of stochastic field shows that in the chaotic sea big magnetic islands must remain intact.

  18. Maltreatment and sexual abuse at home concerning schooling adolscents

    Directory of Open Access Journals (Sweden)

    Yuranis Ibeth Henríquez Santoya

    2013-10-01

    Full Text Available ResumenEl presente estudio consistió en determinar la presencia del maltrato infantil y abuso sexual en el hogar en adolescentes escolarizados con edades comprendidas entre 14 y 16 años, matriculados a 2010 en colegios públicos de la de la ciudad de Santa Marta. Los participantes fueron 229 jóvenes. Las variables medidas fueron la edad, el tipo de maltrato y el género. Los resultados indican que la tendencia al maltrato psicológico fue de 29.3%, de maltrato físico 13.3% y de abuso sexual de 32.3%. Con relación al género se halló que las mujeres han sido objeto en mayor porcentaje de maltrato físico y abuso sexual que los hombres y éstos han sido objeto de mayor maltrato psicológico que las mujeres; respecto a la edad los jóvenes de 14 años presentaron mayor porcentaje de maltrato y abuso que en los otros rangos etarios. Se concluye que tres (3 de cada 10 estudiantes ha sido objeto de abuso sexual, tres ha sido objeto de maltrato psicológico y uno de maltrato físico. (DUAZARY 2011 No. 2, 262 - 269AbstractThe present study was to determine the presence of child maltreatment and sexual abuse at home, concerning schooling adolescents, aged between 14 and 16 years enrolled in public schools belonging to the city of Santa Marta. Participants were 229 young persons. The variables were age, abuse and gender. The results point out: 29.3% for psychological abuse, 32.3% for sexual abuse, and 13.3% for physical abuse. Concerning the gender it was detected that women have been at a higher rate aim of physical mistreatment and sexual abuse than men, but on the other hand men are aim of psychological abuse. With regard to age, young people of 14 years, revealed a higher percentage of maltreatment than the elder ones. We conclude that three of each schooling boy has been object of sexual abuse; three of them have been injured of psychological mistreatment and one of physical abuse.Keywords: abuse; sexual abuse; maltreatment; gender; adolescents

  19. Caracterização do abuso sexual em crianças e adolescentes notificado em um Programa Sentinela Caracterización del abuso sexual en niños y adolescentes notificado en un Programa Centinela Characterization of sexual abuse in children and adolescents notified in a Sentinel Program

    Directory of Open Access Journals (Sweden)

    Rosilene Santos Baptista

    2008-01-01

    padrastros, padres, cuñados; enamorados y desconocidos. Sucedieron 27 casos en el ambiente intrafamiliar y 33 en el extra familiar. El Consejo Tutelar intercedió la mayoría de los registros. CONCLUSIÓN: Es creciente la incidencia de abuso sexual de niños y adolescentes, tanto en el ambiente intrafamiliar como en el extra familiar. Se sugiere educación continua para apoyar a familiares y víctimas de abuso sexual.OBJECTIVES: To characterize sexual abuse in children and adolescents registered by the Sentinel Program in Campina Grande PB; to analyze the incidence of sexual abuse; to define the profile of the children and adolescents seen at this program; to identify the main abusers and incidence of this type of abuse in the intra- and extra-family environment. METHODS: This is a descriptive-exploratory study. Data were collected from 60 children and adolescents and treated statistically. RESULTS: There were 23 notifications in 2005 and 37 in 2005. Of these, 51 notifications were related to girls and nine to boys in unfavorable socioeconomic conditions. The prevalent age ranges were from three to five years old and between 12 and 14. The main abusers were stepfathers, fathers, brothers-in-law; boyfriends and unknown men. There were 27 intra-family and 33 extra-family cases. The Tutelary Council Conselho Tutelar mediated most occurrences. CONCLUSION: The incidence of sexual abuse in children and adolescents is increasing, both in the intra-family and the extra-family environment. Continuous education is suggested to support family members and victims of sexual abuse.

  20. 自尊在儿童期躯体虐待与青少年网络成瘾关系中的中介作用%Relationship of childhood physical abuse and internet addiction disorder in adolescence: the mediating role of self-esteem

    Institute of Scientific and Technical Information of China (English)

    张志华; 杨林胜; 郝加虎; 黄芬; 张秀军; 孙业桓

    2012-01-01

    目的 探讨自尊在儿童期躯体虐待与青少年网络成瘾关系中的中介作用.方法 在合肥市选取5所中学,以班级为单位整群抽取初一、初二、高一和高二年级共76个班3798名学生进行匿名问卷调查,内容包括中学生的社会人口统计学特征、Young网络成瘾量表、亲子冲突策略量表和罗森伯格的自尊量表.结果 儿童期躯体虐待与低自尊、网络成瘾均有关(r=-0.108,P<0.01;r=0.057,P<0.01);自尊在儿童期躯体虐待与网络成瘾之间介导的间接效应有统计学意义(a=-0.703,校正后b=-0.104;z=5.052,P<0.001);自尊所介导的间接效应在总效应中所占的比例为22.5%.结论 自尊在儿童期躯体虐待与青少年网络成瘾关系中起到了部分中介作用,提示可通过对青少年灌能训练、自尊团体训练等提高自尊的方法,减少网络成瘾的发生.%Objective To find out whether the effects of childhood physical abuse on internet addiction disorder in adolescence could be mediated by self-esteem.Methods 3798 high school students selected from 76 classes in Grade One and Grade Two,were asked to fill in the anonymous questionnaire,which including the demographic characteristics of students,Young' s Internet Addiction Scale,Parent-Child Conflict Tactics Scales and Rosenberg' s Self-Esteem Scale.Results Childhood physical abuse could directly predict less self-esteem and internet addiction disorder (r=-0.108,P<0.01,r=0.057,P<0.01 ) and had significant indirect effects on intemet addiction disorder which could be mediated through self-esteem (a=-0.703,standardized b=-0.104,z=5.052,P<0.001 ).Self-esteem had mediated 22.5% of the childhood physical abuse cases on their internet addiction disorders during the period of adolescence.Conclusion Self-esteem could partially mediate the relationship between childhood physical abuse and internet addiction disorder.The mediating roles of self-esteem suggested that salient leverage