Sample records for surveys numerous violence-prevention

  1. Violence Prevention after Columbine: A Survey of High School Mental Health Professionals (United States)

    Crepeau-Hobson, M. Franci; Filaccio, Marylynne; Gottfried, Linda


    The authors examined changes in mental health services and violence prevention strategies in public high schools since the shootings at Columbine High School. Surveys were mailed to school mental health professionals at public high schools in Colorado. Respondents included school counselors, school psychologists, school social workers, principals,…

  2. Preservice teachers' perceived confidence in teaching school violence prevention. (United States)

    Kandakai, Tina L; King, Keith A


    To examine preservice teachers' perceived confidence in teaching violence prevention and the potential effect of violence-prevention training on preservice teachers' confidence in teaching violence prevention. Six Ohio universities participated in the study. More than 800 undergraduate and graduate students completed surveys. Violence-prevention training, area of certification, and location of student- teaching placement significantly influenced preservice teachers' perceived confidence in teaching violence prevention. Violence-prevention training positively influences preservice teachers' confidence in teaching violence prevention. The results suggest that such training should be considered as a requirement for teacher preparation programs.

  3. Sexual Violence Prevention (United States)

    ... Submit What's this? Submit Button Past Emails Sexual Violence Prevention Recommend on Facebook Tweet Share Compartir April ... stop sexual violence before it begins. Understanding Sexual Violence Sexual violence is any sexual activity where consent ...

  4. The science of violence prevention



    Twenty years after Rodrigo Guerrero-Velasco treated violence like a disease, using epidemiology to find the causes, his approach to violence prevention has been taken up across the Americas. He talks to Alyssa Greenhouse.

  5. Engaging Men in Violence Prevention (United States)

    Allen, Christopher T.; Wheeler, Joshua A.


    Violence prevention groups on college campuses, in schools, and in communities are increasingly aware that violence against women cannot end unless men take an active role in stopping it, and the failure of many men to take the issue of violence against women seriously cannot be overlooked. At the University of South Carolina (USC), collaboration…

  6. An Evaluation of Two Dating Violence Prevention Programs on a College Campus. (United States)

    Peterson, Kerry; Sharps, Phyllis; Banyard, Victoria; Powers, Ráchael A; Kaukinen, Catherine; Gross, Deborah; Decker, Michele R; Baatz, Carrie; Campbell, Jacquelyn


    Dating violence is a serious and prevalent public health problem that is associated with numerous negative physical and psychological health outcomes, and yet there has been limited evaluation of prevention programs on college campuses. A recent innovation in campus prevention focuses on mobilizing bystanders to take action. To date, bystander programs have mainly been compared with no treatment control groups raising questions about what value is added to dating violence prevention by focusing on bystanders. This study compared a single 90-min bystander education program for dating violence prevention with a traditional awareness education program, as well as with a no education control group. Using a quasi-experimental pre-test/post-test design with follow-up at 2 months, a sample of predominately freshmen college students was randomized to either the bystander (n = 369) or traditional awareness (n = 376) dating violence education program. A non-randomized control group of freshmen students who did not receive any education were also surveyed (n = 224). Students completed measures of attitudes, including rape myth acceptance, bystander efficacy, and intent to help as well as behavioral measures related to bystander action and victimization. Results showed that the bystander education program was more effective at changing attitudes, beliefs, efficacy, intentions, and self-reported behaviors compared with the traditional awareness education program. Both programs were significantly more effective than no education. The findings of this study have important implications for future dating violence prevention educational programming, emphasizing the value of bystander education programs for primary dating violence prevention among college students. © The Author(s) 2016.

  7. Problems and perspectives of domestic violence prevention


    Kasperskis, Darius


    This paper will analyze the domestic violence prevention problems and perspectives. The goal of this work is to discuss the main domestic violence characteristics, analyze Lithuanian and international prevention means and offer suggestions to improve Lithuanian domestic violence prevention. This work consentrates on mens violence over women. The conseption of violence is analyzed – the general violence features in criminology and law literature are discussed, the main domestic violence forms ...

  8. Global status report on violence prevention, 2014


    Butchart, A.; Mikton, C.


    The Global status report on violence prevention 2014, which reflects data from 133 countries, is the first report of its kind to assess national efforts to address interpersonal violence, namely child maltreatment, youth violence, intimate partner and sexual violence, and elder abuse.\\ud \\ud Jointly published by WHO, the United Nations Development Programme, and the United Nations Office on Drugs and Crime, the report reviews the current status of violence prevention efforts in countries, and...

  9. Athletic coaches as violence prevention advocates. (United States)

    Jaime, Maria Catrina D; McCauley, Heather L; Tancredi, Daniel J; Nettiksimmons, Jasmine; Decker, Michele R; Silverman, Jay G; O'Connor, Brian; Stetkevich, Nicholas; Miller, Elizabeth


    Adolescent relationship abuse (ARA) is a significant public health problem. Coaching Boys Into Men (CBIM) is an evidence-based ARA prevention program that trains coaches to deliver violence prevention messages to male athletes. Assessing acceptability and impact of CBIM on coaches may inform prevention efforts that involve these important adults in health promotion among youth. As part of a two-armed cluster-randomized controlled trial of CBIM in 16 high schools in Northern California, coaches completed baseline and postseason surveys (n = 176) to assess their attitudes and confidence delivering the program. Coaches in the intervention arm also participated in interviews (n = 36) that explored program acceptability, feasibility, and impact. Relative to controls, intervention coaches showed increases in confidence intervening when witnessing abusive behaviors among their athletes, greater bystander intervention, and greater frequency of violence-related discussions with athletes and other coaches. Coaches reported the program was easy to implement and valuable for their athletes. Findings illustrate the value of exploring attitudinal and behavioral changes among ARA prevention implementers, and suggest that coaches can gain confidence and enact behaviors to discourage ARA among male athletes. Coaches found the program to be feasible and valuable, which suggests potential for long-term uptake and sustainability. © The Author(s) 2014.

  10. Youth empowerment solutions for violence prevention. (United States)

    Reischl, Thomas M; Zimmerman, Marc A; Morrel-Samuels, Susan; Franzen, Susan P; Faulk, Monique; Eisman, Andria B; Roberts, Everett


    The limited success of youth violence prevention interventions suggests that effective prevention needs to address causes at multiple levels of analysis and empower youth in developing and implementing prevention programs. In this article, we review published studies of youth violence prevention efforts that engage youth in developing or implementing violence prevention activities. The reviewed studies suggest the promise of youth empowerment strategies and the need for systematic outcome studies of empowerment programs. After reviewing empowerment theory applied to youth violence prevention programs, we present a case study of the Youth Empowerment Solutions (YES) for Peaceful Communities program. YES engages middle-school youth in an after-school and summer program that includes a culturally tailored character development curriculum and empowers the youth to plan and implement community improvement projects with assistance from adult neighborhood advocates. The case study focuses on outcome evaluation results and presents evidence of the YES program effects on community-level outcomes (eg, property improvements, violent crime incidents) and on individual-level outcomes (eg, conflict avoidance, victimization). The literature review and the case study suggest the promise of engaging and empowering youth to plan and implement youth violence prevention programs.

  11. Community asset mapping for violence prevention

    African Journals Online (AJOL)


    Responses to this violence take many forms, including various violence prevention and ... 2 SCRATCHMAPS: Spiritual Capacity and Religious Assets for Transforming Community Health by Mobilising Males for Peace and. Safety .... The asset mapping methodology and toolset were designed by the collaborative research.

  12. Core Competencies for Injury and Violence Prevention (United States)

    Stephens-Stidham, Shelli; Peek-Asa, Corinne; Bou-Saada, Ingrid; Hunter, Wanda; Lindemer, Kristen; Runyan, Carol


    Efforts to reduce the burden of injury and violence require a workforce that is knowledgeable and skilled in prevention. However, there has been no systematic process to ensure that professionals possess the necessary competencies. To address this deficiency, we developed a set of core competencies for public health practitioners in injury and violence prevention programs. The core competencies address domains including public health significance, data, the design and implementation of prevention activities, evaluation, program management, communication, stimulating change, and continuing education. Specific learning objectives establish goals for training in each domain. The competencies assist in efforts to reduce the burden of injury and violence and can provide benchmarks against which to assess progress in professional capacity for injury and violence prevention. PMID:19197083

  13. Violence prevention at work. A business perspective. (United States)

    Wilkinson, C W


    The risk of workplace violence varies depending on the type and location of the business. Business managers should assess violence risk and develop a program based on the level of risk faced by their employees. This assessment should include: (1) a review of workplace security and identification of positions with increased risk of exposure to violence, (2) risk reduction through environmental design and employee training, (3) development of a plan and identification of professional resources to respond to incidents should they occur, and (4) communication of the employer's commitment to providing a safe work environment for employees. For most businesses, threat assessment and management comprise the cornerstone of a workplace violence-prevention program. Planning and preparation are key to workplace violence prevention.

  14. Safety climate and workplace violence prevention in state-run residential addiction treatment centers. (United States)

    Lipscomb, Jane A; London, M; Chen, Y M; Flannery, K; Watt, M; Geiger-Brown, J; Johnson, J V; McPhaul, K


    To examine the association between violence prevention safety climate measures and self reported violence toward staff in state-run residential addiction treatment centers. In mid-2006, 409 staff from an Eastern United States state agency that oversees a system of thirteen residential addiction treatment centers (ATCs) completed a self-administered survey as part of a comprehensive risk assessment. The survey was undertaken to identify and measure facility-level risk factors for violence, including staff perceptions of the quality of existing US Occupational Safety and Health Administration (OSHA) program elements, and ultimately to guide violence prevention programming. Key informant interviews and staff focus groups provided researchers with qualitative data with which to understand safety climate and violence prevention efforts within these work settings. The frequency with which staff reported experiencing violent behavior ranged from 37% for "clients raised their voices in a threatening way to you" to 1% for "clients pushed, hit, kicked, or struck you". Findings from the staff survey included the following significant predictors of violence: "client actively resisting program" (OR=2.34, 95% CI=1.35, 4.05), "working with clients for whom the history of violence is unknown" (OR=1.91, 95% CI=1.18, 3.09) and "management commitment to violence prevention" reported as "never/hardly ever" and "seldom or sometimes" (OR=4.30 and OR=2.31 respectively), while controlling for other covariates. We utilized a combination of qualitative and quantitative research methods to begin to describe the risk and potential for violence prevention in this setting. The prevalence of staff physical violence within the agency's treatment facilities was lower than would be predicted. Possible explanations include the voluntary nature of treatment programs; strong policies and consequences for resident behavior and ongoing quality improvement efforts. Quantitative data identified low

  15. Workplace violence prevention policies in home health and hospice care agencies. (United States)

    Gross, Nathan; Peek-Asa, Corinne; Nocera, Maryalice; Casteel, Carri


    Workplace violence in the home health industry is a growing concern, but little is known about the content of existing workplace violence prevention programs. The authors present the methods for this study that examined workplace violence prevention programs in a sample of 40 California home health and hospice agencies. Data was collected through surveys that were completed by the branch managers of participating facilities. Programs were scored in six different areas, including general workplace violence prevention components; management commitment and employee involvement; worksite analysis; hazard prevention and control; safety and health training; and recordkeeping and program evaluation. The results and discussion sections consider these six areas and the important gaps that were found in existing programs. For example, although most agencies offered workplace violence training, not every worker performing patient care was required to receive the training. Similarly, not all programs were written or reviewed and updated regularly. Few program differences were observed between agency characteristics, but nonetheless several striking gaps were found.

  16. The Impact of Violence Prevention Programs on School Based Violent Behaviors (United States)

    Reed-Reynolds, Shelly


    This dissertation study focused on the potential effect that various violence prevention program strategies implemented within the k-12 school setting have on the frequency of school based violent behaviors. The 2005-06 and 2003-04 School Survey on Crime and Safety (SSOCS:2006 & SSOCS:2004) was utilized as the secondary data source for this…

  17. Putting Research into Practice in School Violence Prevention and Intervention: How Is School Counseling Doing? (United States)

    McAdams, Charles; Shillingford, M. Ann; Trice-Black, Shannon


    This article reports the findings of a national survey of practicing school counselors regarding their knowledge of current research in school violence prevention and intervention. The authors describe four active areas of youth violence research over the past two decades and present findings that suggest that a potentially dangerous gap may exist…

  18. Violence Prevention and Students with Disabilities: Perspectives from the Field of Youth Violence Prevention (United States)

    Gorman-Smith, Deborah


    Much of the work in youth violence prevention has been based in a public health model and guided by a developmental-ecological perspective on risk and prevention (Bronfenbrenner, 1979, 1988). A central tenet of developmental-ecological theory is that individual development is influenced by the ongoing qualities of the social settings in which the…

  19. Urban upgrading for violence prevention in South Africa: Does it ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    The Violence Prevention through Urban Upgrading (VPUU) project, funded jointly by the German Development Bank and the City of Cape Town in South Africa, is a prime example of an evidence-based intervention for violence prevention that was designed to address all urban violence determining factors. The VPUU ...

  20. Gender-Based Violence Prevention. Issues in Prevention (United States)

    Higher Education Center for Alcohol, Drug Abuse, and Violence Prevention, 2012


    This issue of "Issues in Prevention" focuses on gender-based violence prevention. This issue contains the following articles: (1) Preventing Gender-Based Violence: An Overview (Linda Langford); (2) Q&A With Amelia Cobb; (3) Denim Day at HBCUs; (4) Dear Colleague Letter; (5) ED Grants for Violence Prevention; and (6) Higher Education Center…

  1. Using a Domestic and Sexual Violence Prevention Advocate to Implement a Dating Violence Prevention Program with Athletes (United States)

    Jaime, M. C. D.; Stocking, M.; Freire, K.; Perkinson, L.; Ciaravino, S.; Miller, E.


    "Coaching Boys into Men" is an evidence-based dating violence prevention program for coaches to implement with male athletes. A common adaptation of this program is delivery by domestic violence and sexual violence prevention advocates instead of coaches. We explored how this implementer adaptation may influence athlete uptake of program…

  2. [Violence prevention in childhood and adolescence--a brief overview]. (United States)

    Pawils, Silke; Metzner, Franka


    Aggressive and violent behaviour in children and adolescents can be associated with physical and psychological health effects continuing into adulthood. Early programs for violence prevention in childhood and adolescence are intended to prevent or reduce aggressive behaviour in order to decrease the risk for short- and long-term developmental impairments. In a literature review, research findings on prevalence, typical courses of development, and predictors of violent behavior in childhood are first summarized and compared with findings on the frequency, developmental course, and consequences of youth violence. International and German programs for violence prevention in children and adolescents are presented in the context of various settings (family, school, community), target groups (primary vs. secondary prevention) as well as target variables (universal vs. specific). Empirical findings on efficacy testing of violence prevention programs are described and discussed. The presented findings stress the relevance and potential of services for violence prevention for children and adolescents, but also demonstrate the challenges and gaps.

  3. Going Upstream: Policy as Sexual Violence Prevention and Response (United States)

    Iverson, Susan V.; Issadore, Michelle N.


    Policy can and should be used as a tool of sexual violence prevention and response. In this chapter, we explore the historical, social justice, compliance, and best practice rationales for approaching policy development and revision differently.

  4. Mobilizing communities and building capacity for youth violence prevention: the National Academic Centers of Excellence for Youth Violence Prevention. (United States)

    Vivolo, Alana M; Matjasko, Jennifer L; Massetti, Greta M


    Violence, including its occurrence among youth, results in considerable physical, emotional, social, and economic consequences in the US. Youth violence prevention work at the Division of Violence Prevention (DVP) at the Centers for Disease Control and Prevention (CDC) emphasizes preventing youth violence-related behaviors, injuries, and deaths by collaborating with academic and community partners and stakeholders. In 2000 and 2005, DVP funded the National Academic Centers of Excellence (ACE) for Youth Violence Prevention. Most ACE Centers focus on building community capacity and competence so that evidence-based programs for youth violence prevention can be successfully implemented through effective and supportive research-community partnerships. This commentary provides historical information about the ACE Program, including the development, goals, accomplishments of the Centers, and the utilization of a community-based participatory research approach to prevent youth violence.

  5. Global research priorities for interpersonal violence prevention: a modified Delphi study. (United States)

    Mikton, Christopher R; Tanaka, Masako; Tomlinson, Mark; Streiner, David L; Tonmyr, Lil; Lee, Bandy X; Fisher, Jane; Hegadoren, Kathy; Pim, Joam Evans; Wang, Shr-Jie Sharlenna; MacMillan, Harriet L


    To establish global research priorities for interpersonal violence prevention using a systematic approach. Research priorities were identified in a three-round process involving two surveys. In round 1, 95 global experts in violence prevention proposed research questions to be ranked in round 2. Questions were collated and organized according to the four-step public health approach to violence prevention. In round 2, 280 international experts ranked the importance of research in the four steps, and the various substeps, of the public health approach. In round 3, 131 international experts ranked the importance of detailed research questions on the public health step awarded the highest priority in round 2. In round 2, "developing, implementing and evaluating interventions" was the step of the public health approach awarded the highest priority for four of the six types of violence considered (i.e. child maltreatment, intimate partner violence, armed violence and sexual violence) but not for youth violence or elder abuse. In contrast, "scaling up interventions and evaluating their cost-effectiveness" was ranked lowest for all types of violence. In round 3, research into "developing, implementing and evaluating interventions" that addressed parenting or laws to regulate the use of firearms was awarded the highest priority. The key limitations of the study were response and attrition rates among survey respondents. However, these rates were in line with similar priority-setting exercises. These findings suggest it is premature to scale up violence prevention interventions. Developing and evaluating smaller-scale interventions should be the funding priority.

  6. Experiences of Middle-Level Students, Teachers, and Parents in the Do the Write Thing Violence Prevention Program (United States)

    Peterson, Sarah E.; Williams, R. Craig; Myer, Rick A.; Tinajero, Josefina V.


    We examined experiences of participants in "Do the Write Thing" national violence prevention program for middle-level students. Using mixed methods, we conducted surveys and focus groups with students, parents, and teachers who attended the program's National Recognition Week in Washington, DC. Results revealed important affective,…

  7. Adapting the gang model: peer mentoring for violence prevention. (United States)

    Sheehan, K; DiCara, J A; LeBailly, S; Christoffel, K K


    This study assessed the effectiveness of an inner-city peer-mentoring program in modifying the attitudes and behaviors involving violence of preadolescent mentees. In a case-matched cohort study involving 7- to 13-year-old children, 50 children enrolled in peer mentoring (case subjects) were compared with 75 control subjects. Case subjects were involved before enrollment in the community program in which the intervention occurred; control subjects lived in the same housing project and were matched with case subjects on age, sex, and census tract. A total of 19 community adolescents mentored the case subjects by designing and presenting violence prevention lessons. Two reliable self-report scales, Determining our Viewpoints of Violent Events and Normative Beliefs About Aggression Scale, were used to measure attitudinal change. Teachers completed the Revised Behavior Problem Checklist to assess changes in behavior. At baseline, the survey scores of the case and control subjects were not different. After the intervention period, the case scores indicated less support for violence than the control scores. Case behavior scores did not change, but control behavior scores worsened. The data suggest that peer mentoring for younger children may be an important component of efforts to reduce youth violence. A larger multisite trial is warranted.

  8. Violence prevention education program for psychiatric outpatient departments. (United States)

    Feinstein, Robert E


    Approximately 40 % of psychiatrists and up to 64 % of psychiatric residents have been physically assaulted. Ranges of 72-96 % of psychiatric residents in various studies have been verbally threatened. As violence risk occurs in outpatient settings, our department developed a quality and safety curriculum designed to prepare psychiatric residents and staff to optimally respond to aggressive outpatients and violence threats or events. In 2011 and 2012, we offered an 8-part violence prevention performance improvement curriculum/program including (1) situational awareness/creating a safe environment; (2) violence de-escalation training; (3) violence risk assessment training, use of risk assessment tools, and medical record documentation; (4) violence safety discharge planning; (5) legal issues and violence; (6) "shots fired on campus" video/discussion; (7) "2011 violence threat simulation" video/discussion; and (8) violence threat simulation exercise. This program was offered to approximately 60 psychiatric residents/staff in each year. We obtained qualitative comments about the entire program and data from 2 years of post-event surveys on the usefulness of the "violence threat simulation exercise." The large majority of comments about program elements 1 to 7 were positive. In 2011 and 2012, respectively, 76 and 86 % of participants responded to a post-event survey of the violence threat simulation exercise; 90 and 88 % of participants, respectively, reported the simulation to be very helpful/somewhat helpful; and 86 and 82 % of participants, respectively, reported feeling much better/better prepared to deal with a violent event. Although some participants experienced anxiety, sleep disturbances, increase in work safety concerns, and/or traumatic memories, the majority reported no post-simulation symptoms (72 and 80 %, respectively). Although we are unable to demonstrate that this program effectively prevents violence, the overall positive response from participants

  9. Reclaiming Gender and Power in Sexual Violence Prevention in Adolescence. (United States)

    Miller, Elizabeth


    The Mentors in Violence Prevention (MVP) model seeks to address the root causes of gender violence using a bystander approach and leadership training to challenge structures of patriarchy. Emerging research on adolescent relationship abuse and sexual violence points to key modifiable targets-transforming gender norms, addressing homophobia, integrating with comprehensive sexuality education, and acknowledging the needs of youth already exposed to violence. A social justice-based bystander approach such as the MVP model should be part of a multi-level approach to sexual violence prevention that addresses gender and power, encourages healthy sexuality conversations, and provides safety and support for survivors.

  10. A literature survey on numerical heat transfer (United States)

    Shih, T. M.


    Technical papers in the area of numerical heat transfer published from 1977 through 1981 are reviewed. The journals surveyed include: (1) ASME Journal of Heat Transfer, (2) International Journal of Heat and Mass Transfer, (3) AIAA Journal, (4) Numerical Heat Transfer, (5) Computers and Fluids, (6) International Journal for Numerical Methods in Engineering, (7) SIAM Journal of Numerical Analysis, and (8) Journal of Computational Physics. This survey excludes experimental work in heat transfer and numerical schemes that are not applied to equations governing heat transfer phenomena. The research work is categorized into the following areas: (A) conduction, (B) boundary-layer flows, (C) momentum and heat transfer in cavities, (D) turbulent flows, (E) convection around cylinders and spheres or within annuli, (F) numerical convective instability, (G) radiation, (H) combustion, (I) plumes, jets, and wakes, (J) heat transfer in porous media, (K) boiling, condensation, and two-phase flows, (L) developing and fully developed channel flows, (M) combined heat and mass transfer, (N) applications, (O) comparison and properties of numerical schemes, and (P) body-fitted coordinates and nonuniform grids.

  11. Integrating male sexual diversity into violence prevention efforts with men and boys: evidence from the Asia-Pacific Region. (United States)

    Miedema, Stephanie S; Yount, Kathryn M; Chirwa, Esnat; Dunkle, Kristin; Fulu, Emma


    Men's perpetration of gender-based violence remains a global public health issue. Violence prevention experts call for engagement of boys and men to change social norms around masculinity in order to prevent gender-based violence. Yet, men do not comprise a homogenous category. Drawing on probability estimates of men who report same-sex practices and preferences captured in a multi-country gender-based violence prevention survey in the Asia-Pacific region, we test the effects of sexuality-related factors on men's adverse life experiences. We find that sexual minority men face statistically higher risk of lifetime adversity related to gender-based violence, stemming from gender inequitable norms in society. Sexuality is thus a key axis of differentiation among men in the Asia-Pacific region, influencing health and wellbeing and reflecting men's differential engagement with dominant norms of masculinity. Integrating awareness of male sexual diversity into gender-based violence prevention interventions, particularly those that work with boys and men, and bridging violence prevention programming between sexual minority communities and women, are essential to tackle the root drivers of violence.

  12. A Case Study of Violence Prevention in an Elementary School (United States)

    Crawford, Diane Lynn


    This case study was initiated to explore how 6 fourth-grade student mediators implemented an inner-city elementary school's violence prevention program based on peer mediation in the context of psychosocial theory. The participants were trained in conflict resolution to intervene with disputants who experienced unresolved disagreements. To…

  13. Creating Safe and Healthy Futures: Michigan Youth Violence Prevention Center (United States)

    Morrel-Samuels, Susan; Zimmerman, Marc A.; Reischl, Thomas M.


    Youth are in the cross-fire of gun violence, and the highest rate in the nation is in Flint, Michigan. This article highlights six innovative strategies that prepare youth to solve problems at home and in their communities in peaceful ways. The Michigan Youth Violence Prevention Center (MI-YVPC) works with community groups to strengthen…

  14. A Quasi-Experimental Analysis of Schoolwide Violence Prevention Programs (United States)

    Barnes, Tia Navelene; Leite, Walter; Smith, Stephen W.


    Violence prevention programs are commonplace in today's schools, though reviews of the literature reveal mixed empirical findings on their effectiveness. Often, these programs include a variety of components such as social skills training, student mentoring, and activities designed to build a sense of school community that have not been tested for…

  15. Emergency Protocol and Violence Prevention in a University Setting (United States)

    Rust, Dylan


    This study analyzed the emergency protocol and violence prevention methods utilized at an American university. The four research questions were: (1) What are the sources of violence at the university? a. How has the university addressed these sources? (2) What constitutes an emergency in the eyes of the university? (3) How do emergency protocols…

  16. African Safety Promotion: A Journal of Injury and Violence Prevention

    African Journals Online (AJOL)

    African Safety Promotion: A Journal of Injury and Violence Prevention (ASP) is a forum for discussion and debate among scholars, policy-makers and practitioners active in the field of injury prevention and safety promotion. ASP seeks to promote research and dialogue around a central public health issue that affects Africa, ...

  17. Sexual Violence Prevention through Bystander Education: An Experimental Evaluation (United States)

    Banyard, Victoria L.; Moynihan, Mary M.; Plante, Elizabethe G.


    The current study used an experimental design to evaluate a sexual violence prevention program based on a community of responsibility model that teaches women and men how to intervene safely and effectively in cases of sexual violence before, during, and after incidents with strangers, acquaintances, or friends. It approaches both women and men as…

  18. Violence Prevention in Middle School: A Preliminary Study (United States)

    KIllam, Wendy K.; Roland, Catherine B.; Weber, Bill


    Violence in schools continues reflecting violence within society. There is a growing need for violence prevention programs within the schools that provide students with the skills needed to cope with interpersonal and relationship is-sues effectively. This study was conducted at a middle school and there were 345 middle school students (6th to 8th…

  19. Examining the utility of a train-the-trainer model for dissemination of sexual violence prevention in schools. (United States)

    Weingarten, Christine; Rabago, Jina; Reynolds, Jasmine; Gates, Kalani; Yanagida, Evie; Baker, Charlene


    Rates of childhood sexual abuse are unacceptably high, with potentially long-lasting consequences for those who have been victimized. Currently, there are a number of sexual violence prevention programs that have been developed to lower rates of victimization, increase awareness, and connect victims with resources. Within this area of research, there has been less focus on effective methods of program dissemination. For example, school-based sexual violence prevention programs have had positive outcomes; however, little is known about how these programs are disseminated. The train-the-trainer model of dissemination utilizes master trainers to equip others to implement programs, thereby allowing more adults to teach and subsequently more children to receive the program. This study used survey data from teachers and other school personnel (n = 127) to analyze the utility of a train-the-trainer model of dissemination for a sexual violence prevention program in the state of Hawai'i. Through responses of people who were trained to implement the program (59.8% of whom did implement), aspects of the training, the program itself, and factors affecting whether a person implemented the program were explored. Results suggest that time spent in training, job position, and time in that position predicted whether a person trained to implement the sexual violence prevention program followed through with teaching the program to students. Additionally, 54.7% of people who did implement the program had at least one student disclose sexual violence to them, indicating the importance of sexual violence prevention programming and dissemination of these programs. Copyright © 2018 Elsevier Ltd. All rights reserved.

  20. Youth exposure to violence prevention programs in a national sample. (United States)

    Finkelhor, David; Vanderminden, Jennifer; Turner, Heather; Shattuck, Anne; Hamby, Sherry


    This paper assesses how many children and youth have had exposure to programs aimed at preventing various kinds of violence perpetration and victimization. Based on a national sample of children 5-17, 65% had ever been exposed to a violence prevention program, 55% in the past year. Most respondents (71%) rated the programs as very or somewhat helpful. Younger children (5-9) who had been exposed to higher quality prevention programs had lower levels of peer victimization and perpetration. But the association did not apply to older youth or youth exposed to lower quality programs. Disclosure to authorities was also more common for children with higher quality program exposure who had experienced peer victimizations or conventional crime victimizations. The findings are consistent with possible benefits from violence prevention education programs. However, they also suggest that too few programs currently include efficacious components. Copyright © 2014 Elsevier Ltd. All rights reserved.

  1. Family Violence Prevention and Services Programs. Final rule. (United States)


    This rule will better prevent and protect survivors of family violence, domestic violence, and dating violence, by clarifying that all survivors must have access to services and programs funded under the Family Violence Prevention and Services Act. More specifically, the rule enhances accessibility and non-discrimination provisions, clarifies confidentiality rules, promotes coordination among community-based organizations, State Domestic Violence Coalitions, States, and Tribes, as well as incorporates new discretionary grant programs. Furthermore, the rule updates existing regulations to reflect statutory changes made to the Family Violence Prevention and Services Act, and updates procedures for soliciting and awarding grants. The rule also increases clarity and reduces potential confusion over statutory and regulatory standards. The rule codifies standards already used by the program in the Funding Opportunity Announcements and awards, in technical assistance, in reporting requirements, and in sub-regulatory guidance.

  2. Use of an audit in violence prevention research. (United States)

    Erwin, Elizabeth Hite; Meyer, Aleta; McClain, Natalie


    Auditing is an effective tool for articulating the trustworthiness and credibility of qualitative research. However, little information exists on how to conduct an audit. In this article, the authors illustrate their use of an audit team to explore the methods and preliminary findings of a study aimed at identifying the relevant and challenging problems experienced by urban teenagers. This study was the first in a series of studies to improve the ecological validity of violence prevention programs for high-risk urban teenagers, titled Identifying Essential Skills for Violence Prevention. The five phases of this audit were engaging the auditor, becoming familiar with the study, discussing methods and determining strengths and limitations, articulating audit findings, and planning subsequent research. Positioning the audit before producing final results allows researchers to address many study limitations, uncover potential sources of bias in the thematic structure, and systematically plan subsequent steps in an emerging design.

  3. Community Engagement in Youth Violence Prevention: Crafting Methods to Context. (United States)

    Morrel-Samuels, Susan; Bacallao, Martica; Brown, Shelli; Bower, Meredith; Zimmerman, Marc


    The purpose of the Youth Violence Prevention Centers (YVPC) Program at the Centers for Disease Control and Prevention is to reduce youth violence in defined high-risk communities through the implementation and evaluation of comprehensive, evidence based prevention strategies. Within this common framework, each YVPC varies in its structure and methods, however all engage communities in multiple ways. We explore aspects of community engagement employed by three centers that operate in very different contexts: a rural county in North Carolina; a suburban area of Denver, Colorado; and an urban setting in Flint, Michigan. While previous research has addressed theories supporting community involvement in youth violence prevention, there has been less attention to the implementation challenges of achieving and sustaining participation. In three case examples, we describe the foci and methods for community engagement in diverse YVPC sites and detail the barriers and facilitating factors that have influenced implementation. Just as intervention programs may need to be adapted in order to meet the needs of specific populations, methods of community engagement must be tailored to the context in which they occur. We discuss case examples of community engagement in areas with varying geographies, histories, and racial and ethnic compositions. Each setting presents distinct challenges and opportunities for conducting collaborative violence prevention initiatives and for adapting engagement methods to diverse communities. Although approaches may vary depending upon local contexts, there are certain principles that appear to be common across cultures and geography: trust, transparency, communication, commitment. We also discuss the importance of flexibility in community engagement efforts.

  4. Understanding small business engagement in workplace violence prevention programs. (United States)

    Bruening, Rebecca A; Strazza, Karen; Nocera, Maryalice; Peek-Asa, Corinne; Casteel, Carri


    Worksite wellness, safety, and violence prevention programs have low penetration among small, independent businesses. This study examined barriers and strategies influencing small business participation in workplace violence prevention programs (WVPPs). A semistructured interview guide was used in 32 telephone interviews. The study took place at the University of North Carolina Injury Prevention Research Center. Participating were a purposive sample of 32 representatives of small business-serving organizations (e.g., business membership organizations, regulatory agencies, and economic development organizations) selected for their experience with small businesses. This study was designed to inform improved dissemination of Crime Free Business (CFB), a WVPP for small, independent retail businesses. Thematic qualitative data analysis was used to identify key barriers and strategies for promoting programs and services to small businesses. Three key factors that influence small business engagement emerged from the analysis: (1) small businesses' limited time and resources, (2) low salience of workplace violence, (3) influence of informal networks and source credibility. Identified strategies include designing low-cost and convenient programs, crafting effective messages, partnering with influential organizations and individuals, and conducting outreach through informal networks. Workplace violence prevention and public health practitioners may increase small business participation in programs by reducing time and resource demands, addressing small business concerns, enlisting support from influential individuals and groups, and emphasizing business benefits of participating in the program.

  5. Trauma Center Based Youth Violence Prevention Programs: An Integrative Review. (United States)

    Mikhail, Judy Nanette; Nemeth, Lynne Sheri


    Youth violence recidivism remains a significant public health crisis in the United States. Violence prevention is a requirement of all trauma centers, yet little is known about the effectiveness of these programs. Therefore, this systematic review summarizes the effectiveness of trauma center-based youth violence prevention programs. A systematic review of articles from MEDLINE, CINAHL, and PsychINFO databases was performed to identify eligible control trials or observational studies. Included studies were from 1970 to 2013, describing and evaluating an intervention, were trauma center based, and targeted youth injured by violence (tertiary prevention). The social ecological model provided the guiding framework, and findings are summarized qualitatively. Ten studies met eligibility requirements. Case management and brief intervention were the primary strategies, and 90% of the studies showed some improvement in one or more outcome measures. These results held across both social ecological level and setting: both emergency department and inpatient unit settings. Brief intervention and case management are frequent and potentially effective trauma center-based violence prevention interventions. Case management initiated as an inpatient and continued beyond discharge was the most frequently used intervention and was associated with reduced rearrest or reinjury rates. Further research is needed, specifically longitudinal studies using experimental designs with high program fidelity incorporating uniform direct outcome measures. However, this review provides initial evidence that trauma centers can intervene with the highest of risk patients and break the youth violence recidivism cycle. © The Author(s) 2015.

  6. A survey of numerical cubature over triangles

    Energy Technology Data Exchange (ETDEWEB)

    Lyness, J.N.; Cools, R.


    This survey collects together theoretical results in the area of numerical cubature over triangles and is a vehicle for a current bibliography. We treat first the theory relating to regular integrands and then the corresponding theory for singular integrands with emphasis on the ``full comer singularity.`` Within these two sections we treat successively approaches based on transforming the triangle into a square, formulas based on polynomial moment fitting, and extrapolation techniques. Within each category we quote key theoretical results without proof, and relate other results and references to these. Nearly all the references we have found may be readily placed in one of these categories. This survey is theoretical in character and does not include recent work in adaptive and automatic integration.

  7. Global Status Report on Violence Prevention 2014. (United States)

    Mikton, Christopher R; Butchart, Alexander; Dahlberg, Linda L; Krug, Etienne G


    Interpersonal violence affects millions of people worldwide, often has lifelong consequences, and is gaining recognition as an important global public health problem. There has been no assessment of measures countries are taking to address it. This report aims to assess such measures and provide a baseline against which to track future progress. In each country, with help from a government-appointed National Data Coordinator, representatives from six to ten sectors completed a questionnaire before convening in a consensus meeting to decide on final country data; 133 of 194 (69%) WHO Member States participated. The questionnaire covered data, plans, prevention measures, and victim services. Data were collected between November 2012 and June 2014, and analyzed between June and October 2014. Global and country-level homicides for 2000-2012 were also calculated for all 194 Members. Worldwide, 475,000 people were homicide victims in 2012 and homicide rates declined by 16% from 2000 to 2012. Data on fatal and, in particular, non-fatal forms of violence are lacking in many countries. Each of the 18 types of surveyed prevention programs was reported to be implemented in a third of the 133 participating countries; each law was reported to exist in 80% of countries, but fully enforced in just 57%; and each victim service was reported to be in place in just more than half of the countries. Although many countries have begun to tackle violence, serious gaps remain, and public health researchers have a critical role to play in addressing them. Copyright © 2016. Published by Elsevier Inc.

  8. Global Status Report on Violence Prevention 2014 (United States)

    Mikton, Christopher R.; Butchart, Alexander; Dahlberg, Linda L.; Krug, Etienne G.


    Introduction Interpersonal violence affects millions of people worldwide, often has lifelong consequences, and is gaining recognition as an important global public health problem. There has been no assessment of measures countries are taking to address it. This report aims to assess such measures and provide a baseline against which to track future progress. Methods In each country, with help from a government-appointed National Data Coordinator, representatives from six to ten sectors completed a questionnaire before convening in a consensus meeting to decide on final country data; 133 of 194 (69%) WHO Member States participated. The questionnaire covered data, plans, prevention measures, and victim services. Data were collected between November 2012 and June 2014, and analyzed between June and October 2014. Global and country-level homicides for 2000–2012 were also calculated for all 194 Members. Results Worldwide, 475,000 people were homicide victims in 2012 and homicide rates declined by 16% from 2000 to 2012. Data on fatal and, in particular, non-fatal forms of violence are lacking in many countries. Each of the 18 types of surveyed prevention programs was reported to be implemented in a third of the 133 participating countries; each law was reported to exist in 80% of countries, but fully enforced in just 57%; and each victim service was reported to be in place in just more than half of the countries. Conclusions Although many countries have begun to tackle violence, serious gaps remain, and public health researchers have a critical role to play in addressing them. PMID:26689979

  9. Youth Violence Prevention and Safety: Opportunities for Health Care Providers. (United States)

    Duke, Naomi Nichele; Borowsky, Iris Wagman


    Violence involvement remains a leading cause of morbidity and mortality for youth and young adults in the United States. The impact of adverse childhood experiences on violence involvement can be translated to the cellular level, including alterations in brain structure and function responsible for stress reactivity and coping. This knowledge is counterbalanced by a growing understanding of what works in the realm of youth violence prevention. Incorporating a resilience framework, with its focus on building developmental assets and resources at individual, family, and community levels, offers a renewed approach to fostering healthy behaviors and coping strategies. Copyright © 2015 Elsevier Inc. All rights reserved.

  10. African American legislators' perceptions of firearm violence prevention legislation. (United States)

    Payton, Erica; Thompson, Amy; Price, James H; Sheu, Jiunn-Jye; Dake, Joseph A


    Firearm mortality is the leading cause of death for young African American males, however, few studies have focused on racial/ethnic minority populations and firearm violence. The National Black Caucus of State Legislators advocates for legislation that promotes the health of African Americans. Thus, the purpose of this study was to collect baseline data on African American legislators' perceptions regarding firearm violence in the African American community. A cross-sectional study of African American legislators (n = 612) was conducted to investigate the research questions. Of the 612 questionnaires mailed, 12 were not deliverable, and 170 were returned (28%). Utilizing a three wave mailing process, African American legislators were invited to participate in the study. The majority (88%) of respondents perceived firearm violence to be very serious among African Americans. Few (10%) legislators perceived that addressing legislative issues would be an effective strategy in reducing firearm violence among African Americans. The majority (72%) of legislators perceived the most effective strategy to reducing firearm violence in the African American community should focus on addressing societal issues (e.g. crime and poverty). After adjusting for the number of perceived barriers, the number of perceived benefits was a significant predictor of legislators' perceived effectiveness of firearm violence prevention legislation for 8 of the 24 potential firearm violence prevention legislative bills.

  11. Depressive Symptoms Moderate Dating Violence Prevention Outcomes Among Adolescent Girls. (United States)

    Collibee, Charlene; Rizzo, Christie J; Kemp, Kathleen; Hood, Erik; Doucette, Hannah; Gittins Stone, Daniel I; DeJesus, Brett


    Few dating violence prevention programs assess how variations in initial violence risk affects responsiveness. This study examines the efficacy of Date SMART, a dating violence and sexual risk prevention program designed to target high-risk adolescent girls, in preventing dating violence in the context of varying initial levels of depressive symptoms. A diverse sample of N = 109 female adolescents with a history of physical dating violence participated in a randomized controlled trial of the Date SMART program and a knowledge only (KO) comparison. Using baseline depression level as a primary risk factor, a series of multilevel models revealed significant main effects of baseline depression such that higher baseline depression was associated with greater physical dating violence perpetration and victimization. Results also showed a three-way interaction for assessment point, depressive symptoms, and condition for physical dating violence perpetration. Specifically, those with higher baseline depression in Date SMART showed significantly less physical dating violence perpetration at follow-ups compared with those with higher baseline depression in the KO group. This difference in violence reduction between conditions was not observed for those with lower baseline depression. Date SMART appears to effectively reduce physical dating violence perpetration in those with higher levels of initial risk. Current findings support that adolescents with different risk profiles respond differently to violence prevention programs.

  12. Youth and Adult Perspectives on Violence Prevention Strategies: A Community-Based Participatory Study (United States)

    Dodington, James; Mollen, Cynthia; Woodlock, Joseph; Hausman, Alice; Richmond, Therese S.; Fein, Joel A.


    This project explores the beliefs and perspectives of urban adults and youth regarding community violence prevention strategies and identifies points of overlap and differences of opinion that can contribute to the development of successful youth violence prevention programs. We coded transcript data from adults and 10-16-year-old youth from the…

  13. Family Violence Prevention Programs in Immigrant Communities: Perspectives of Immigrant Men (United States)

    Simbandumwe, Louise; Bailey, Kim; Denetto, Shereen; Migliardi, Paula; Bacon, Brenda; Nighswander, Maggie


    The Strengthening Families in Canada Family Violence Prevention Project was aimed at engaging immigrant and refugee communities in family violence prevention. The project, which received support from the Community Mobilization Program, National Crime Prevention Strategy, involved a partnership of four community health and education organizations.…

  14. NCIPC's contribution to global injury and violence prevention: past, present, and future. (United States)

    Mahendra, Reshma R; Roehler, Douglas R; Degutis, Linda C


    Injuries and violence impact millions across the globe each year. For the past 20 years, the National Center for Injury Prevention and Control (NCIPC) at the Centers for Disease Control and Prevention (CDC) has assembled the largest cadre of injury and violence prevention experts in the world to reduce the burden of injuries and violence domestically and to inform global injury and violence prevention efforts. This article focuses on NCIPC's global injury and violence prevention work that involves: increasing awareness of the preventability of injury and violence, partnerships to promote injury research and best practices; establishing standards and guidance for data collection; building capacity through training and mentoring; and supporting evidence-based strategies. To decrease the global burden, the authors propose priority setting to maximize the development and sustainability of financial and human resources for injury and violence prevention. The authors call for increased capacity and resources for global injury and violence prevention. Published by Elsevier Ltd.

  15. Rethinking the bystander role in school violence prevention. (United States)

    Stueve, Ann; Dash, Kimberly; O'Donnell, Lydia; Tehranifar, Parisa; Wilson-Simmons, Renée; Slaby, Ronald G; Link, Bruce G


    Public concerns about school shootings and safety draw attention to the role bystanders can play in preventing school violence. Although school violence prevention plans are often required, there is little guidance about whether these should address the roles of bystanders and what actions bystanders should take in different circumstances, from more common instances of bullying and fighting to rare, but potentially lethal, threats and use of weapons. Literature pertaining to bystanders is reviewed and applied to the school setting. The definition of bystander is expanded, including parents, teachers, and other school staff as well as youths and those who have information about potential violence as well as those who witness its occurrence. Barriers preventing bystanders from taking positive actions are discussed. The authors call on health promotion researchers and practitioners to work with school communities to identify norms, attitudes, and outcome expectancies that shape bystander behaviors to inform prevention efforts.

  16. Violence prevention in special education schools - an integrated practice? (United States)

    Pihl, Patricia; Grytnes, Regine; Andersen, Lars Peter S


    Research has shown that employees in special education settings are at high risk for work-related threats and violence. Previous research has not yet been able to identify the essential components of training programs that offer protection from work-related threats and violence. Therefore, the aim of this study was to explore how employees in special education schools deal with prevention of work-related threats and violence. Group interviews were conducted with 14 employees working at 5 special education schools. Results show that employees use a wide range of prevention strategies drawing on specific violence prevention techniques as well as professional pedagogical approaches. We propose that the prevention of threats and violence in special education schools can be understood as an integrated pedagogical practice operating on three interrelated levels. Copyright © 2018 Elsevier Ltd. All rights reserved.

  17. A Live Threat Violence Simulation Exercise for Psychiatric Outpatient Departments: A Valuable Aid to Training in Violence Prevention. (United States)

    Feinstein, Robert E; Yager, Joel


    Violence in psychiatric outpatient settings is a ubiquitous concern. This article describes the development, implementation, and evaluation of a live threat violence simulation exercise, designed to reduce the risk of future outpatient clinic violence and minimize the effects of future incidents on staff. The psychiatric outpatient clinic at the University of Colorado Hospital developed, implemented, and evaluated a 4-hour live violence threat simulation exercise as a companion to a 7-hour violence prevention program. The simulation includes an orientation, two threat simulation scenarios, three debriefings, satisfaction surveys, problem identification, action plans, and annual safety and process improvements. The authors have conducted live violence simulation exercises from 2011-2016, and have collected survey data about our annual simulation exercise from 2014-2016. Each year ≥ 52% of participants responded, and each year ≥ 90% of respondents rated the simulation as "very helpful/helpful", ≥ 86% believed themselves to be "much better/better" prepared to deal with violent episodes, and simulation side effects such as worries about past trauma; anxiety; sleep problems; increase in workplace concerns. From 2011-2016, the clinic experienced 4 major violent episodes and 36 episodes of potential violence with no staff injuries and minimal psychological sequelae to one staff member. Violence prevention efforts and the development of close police/staff relationships may have contributed to these fortunate outcomes. Satisfaction surveys suggest that the simulations are very helpful/helpful, with participants feeling much better/ better prepared to manage violence. The exercises led the authors to initiate staff safety related behavioral changes as well as physical space and safety processes improvements. The violence prevention program and simulation exercises have promoted excellent relationships with police and a consistent safety record over six years. This

  18. 25 CFR 63.36 - What are the special requirements for Indian child protection and family violence prevention... (United States)


    ... protection and family violence prevention programs? 63.36 Section 63.36 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR TRIBAL GOVERNMENT INDIAN CHILD PROTECTION AND FAMILY VIOLENCE PREVENTION Indian Child Protection and Family Violence Prevention Program § 63.36 What are the special requirements for...

  19. 25 CFR 63.32 - Under what authority are Indian child protection and family violence prevention program funds... (United States)


    ... family violence prevention program funds awarded? 63.32 Section 63.32 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR TRIBAL GOVERNMENT INDIAN CHILD PROTECTION AND FAMILY VIOLENCE PREVENTION Indian Child Protection and Family Violence Prevention Program § 63.32 Under what authority are Indian child...

  20. 25 CFR 63.30 - What is the purpose of the Indian child protection and family violence prevention program? (United States)


    ... family violence prevention program? 63.30 Section 63.30 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR TRIBAL GOVERNMENT INDIAN CHILD PROTECTION AND FAMILY VIOLENCE PREVENTION Indian Child Protection and Family Violence Prevention Program § 63.30 What is the purpose of the Indian child protection...

  1. Involuntary Outpatient Commitment and the Elusive Pursuit of Violence Prevention. (United States)

    Swartz, Marvin S; Bhattacharya, Sayanti; Robertson, Allison G; Swanson, Jeffrey W


    Involuntary outpatient commitment (OPC)-also referred to as 'assisted outpatient treatment' or 'community treatment orders'-are civil court orders whereby persons with serious mental illness and repeated hospitalisations are ordered to adhere to community-based treatment. Increasingly, in the United States, OPC is promoted to policy makers as a means to prevent violence committed by persons with mental illness. This article reviews the background and context for promotion of OPC for violence prevention and the empirical evidence for the use of OPC for this goal. Relevant publications were identified for review in PubMed, Ovid Medline, PsycINFO, personal communications, and relevant Internet searches of advocacy and policy-related publications. Most research on OPC has focussed on outcomes such as community functioning and hospital recidivism and not on interpersonal violence. As a result, research on violence towards others has been limited but suggests that low-level acts of interpersonal violence such as minor, noninjurious altercations without weapon use and arrests can be reduced by OPC, but there is no evidence that OPC can reduce major acts of violence resulting in injury or weapon use. The impact of OPC on major violence, including mass shootings, is difficult to assess because of their low base rates. Effective implementation of OPC, when combined with intensive community services and applied for an adequate duration to take effect, can improve treatment adherence and related outcomes, but its promise as an effective means to reduce serious acts of violence is unknown.

  2. The Violence Prevention Community Meeting: A Multi-Site Study. (United States)

    Lanza, Marilyn; Ridenour, Marilyn; Hendricks, Scott; Rierdan, Jill; Zeiss, Robert; Schmidt, Satu; Lovelace, Jeff; Amandus, Harlan


    The Violence Prevention Community Meeting (VPCM) is a specialized form of community meeting in which avoiding violence and promoting non-violent problem solving and interpersonal civility are focal points. A nationwide study to assess the VPCM as an effective intervention to reduce workplace violence was undertaken. Seven acute locked psychiatric units of the Veterans Health Administration (VHA) throughout the United States participated in the study. All patients and all staff on the seven in-patient locked psychiatry units participated in the intervention (VPCM) or as a control (treatment as usual). The study was 21weeks at each site. The three time periods were pre-treatment weeks 1-3, treatment weeks 4-18, and post-treatment weeks 19-21. The VPCM was conducted during the treatment weeks. Overall rates of aggression declined by 0.6% (95% CI: -5.6%, 6.5%; nonsignificant) per week in the intervention hospitals and by 5.1% (95% CI: 0.4%, 9.6%; significant) per week for the control hospitals. Aggression decreased for both the intervention and control hospitals which could be due to enrollment in a research study and thus being more aware of their ability to address workplace violence at their site. Published by Elsevier Inc.

  3. School-based violence prevention strategy: a pilot evaluation. (United States)

    Thakore, Rachel V; Apfeld, Jordan C; Johnson, Ronald K; Sathiyakumar, Vasanth; Jahangir, A Alex; Sethi, Manish K


    Violence has recently been reported among a primarily young, minority population in Nashville, Tennessee. School-based programs have been proven as effective methods of reducing violent behavior, beliefs, and actions that lead to violence among adolescents. Investigators implemented a rigorous search for an appropriate school-based violence prevention program for Metropolitan Nashville middle school students utilizing a systematic review and discussion group with victims of violence. 27 programs nation-wide were reviewed and 2 discussion groups with African American males under the age of 25 admitted to a level 1 trauma center for assault-related injuries were conducted. Our findings led to a single, evidence-based conflict resolution program. In conjunction with educators, we evaluated the program's effectiveness in a pilot study in a Nashville middle school with high rates of violence. 122 students completed the conflict resolution program and described their behavior and experiences with violence in a pre-test/post-test self-rate questionnaire. Results showed a significant decrease in violent behavior and an increase in students' competencies to deal with violence (p less than 0.05). This study shows that a reduction in violent behavior and beliefs among middle school students can be achieved through the implementation of a targeted violence intervention program. A larger-scale intervention is needed to develop more conclusive evidence of effectiveness. © 2015 KUMS, All rights reserved.

  4. Parents' Expectations of High Schools in Firearm Violence Prevention. (United States)

    Payton, Erica; Khubchandani, Jagdish; Thompson, Amy; Price, James H


    Firearm violence remains a significant problem in the US (with 2787 adolescents killed in 2015). However, the research on school firearm violence prevention practices and policies is scant. Parents are major stakeholders in relation to firearm violence by youths and school safety in general. The purpose of this study was to examine what parents thought schools should be doing to reduce the risk of firearm violence in schools. A valid and reliable questionnaire was mailed to a national random sample of 600 parents who had at least one child enrolled in a public secondary school (response rate = 47%). Parents perceived inadequate parental monitoring/rearing practices (73%), peer harassment and/or bullying (58%), inadequate mental health care services for youth (54%), and easy access to guns (51%) as major causes of firearm violence in schools. The school policies perceived to be most effective in reducing firearm violence were installing an alert system in schools (70%), working with law enforcement to design an emergency response plan (70%), creating a comprehensive security plan (68%), requiring criminal background checks for all school personnel prior to hiring (67%), and implementing an anonymous system for students to report peer concerns regarding potential violence (67%). Parents seem to have a limited grasp of potentially effective interventions to reduce firearm violence.

  5. Violence-prevention summit at Virginia Tech tackles bullying, gender-based violence, more


    Elliott, Jean


    Bullying in schools, aggression in the workplace, violence against women -- all are complex problems. On Nov. 12 and 13, Virginia Tech hosts a gathering to make recommendations about violence prevention.

  6. How do ex-offenders in the CWP contribute to violence prevention in ...

    International Development Research Centre (IDRC) Digital Library (Canada)


    Aug 3, 2016 ... ... and reintegration have minimized their chances of relapsing into a life of crime. ... implementation of crime and violence prevention initiatives in the two communities. ... Using psychology to reduce violence in South Africa.

  7. [Violence prevention in secondary schools: the Faustlos-curriculum for middle school]. (United States)

    Schick, Andreas; Cierpka, Manfred


    Schools and kindergartens are particularly suitable for the implementation of violence prevention programs. Many German schools and kindergartens have securely established the violence prevention curriculum Faustlos. The Faustlos programs for kindergartens and elementary schools are now complemented with the version for middle schools. As the kindergarten- and elementary school versions the middle school program too focuses on the theoretically profound, age group-tailored promotion of empathy, impulse control and anger management. These dimensions are subdivided into the five themes "understanding the problem" "training for empathy"; "anger management", "problem solving" and "applying skills" and taught stepwise, highly structured and based on several video sequences in 31 lessons. US-American evaluation studies proof the effectiveness and the violence prevention potential of the program. With the curriculum for middle schools a comprehensive Faustlos program package is now made available to sustainably promote core violence prevention competences of children and adolescents on a developmentally appropriate level and with a consistent didactic approach.

  8. The Leadership Program’s Violence Prevention Project: Infusing the Arts into Conflict Resolution

    Directory of Open Access Journals (Sweden)

    Lisa M. Chauveron


    Full Text Available While the demand for youth violence prevention programs increases, the ability of the traditional school day schedule to accommodate violence prevention program time requirements has diminished. School reforms, such as No Child Left Behind, have pressed schools to focus more tightly on academics, often to the exclusion of subjects such as physical education and the arts. Viable violence prevention programs must offer components that supplement classroom curriculum as well as reduce violence and strike a balance between brevity and effectiveness. The Leadership Program’s (TLP universal Violence Prevention Project (VPP meets this call with a conflict resolution model for students in urban schools. The curriculum is based on a conceptual framework derived from prevention science and positive youth development delivered through the vehicle of the arts. Utilizing an engaging hybrid prevention program, this high quality 12 session model melds fidelity and adaptation to yield effective evaluation outcomes.

  9. [The development of an integrated suicide-violence prevention program for adolescents]. (United States)

    Park, Hyun Sook


    The purpose of this study was to develop an integrated suicide-violence prevention program for adolescents. Another purpose was to evaluate the effects of the integrated suicide-violence prevention program on self-esteem, parent-child communication, aggression, and suicidal ideation in adolescents. The study employed a quasi-experimental design. Participants for the study were high school students, 24 in the experimental group and 25 in the control group. Data was analyzed by using the SPSS/WIN. 11.5 program with chi2 test, t-test, and 2-way ANOVA. Participants in the integrated suicide-violence prevention program reported increased self-esteem scores, which was significantly different from those in the control group. Participants in the integrated suicide-violence prevention program reported decreased aggression and suicidal ideation scores, which was significantly different from those in the control group. The integrated suicide-violence prevention program was effective in improving self-esteem and decreasing aggression and suicidal ideation for adolescents. Therefore, this approach is recommended as the integrated suicide-violence prevention strategy for adolescents.

  10. Evaluation of a gender-based violence prevention program for student athletes in Mumbai, India. (United States)

    Miller, Elizabeth; Das, Madhumita; Tancredi, Daniel J; McCauley, Heather L; Virata, Maria Catrina D; Nettiksimmons, Jasmine; O'Connor, Brian; Ghosh, Sancheeta; Verma, Ravi


    Gender-based violence, which includes sexual and intimate partner violence against women, is prevalent worldwide, prompting calls for primary prevention programs which engage men and boys in changing social norms that condone violence against women. Bystander intervention efforts which encourage males to say something to stop peers from enacting disrespectful and abusive behaviors toward females are a promising strategy for promoting non-violent, gender-equitable attitudes and behaviors. An evaluation of "Parivartan"--a U.S. program called "Coaching Boys Into Men" adapted for urban India cricket teams--was conducted in Mumbai, India. Baseline and 12 month follow-up surveys were administered to 309 male cricket athletes aged 10 to 16 years in 46 urban middle schools in Mumbai, India (27 intervention, 19 control). Athletes whose coaches were trained in the program demonstrated greater improvements in gender-equitable attitudes compared to athletes whose coaches provided standard coaching only. Marginally significant improvements were seen in reduction of negative bystander behavior. Violence prevention programs which utilize coaches as positive messengers for respect and non-violence may be a useful addition to global prevention efforts to reduce violence against women.

  11. Getting men in the room: perceptions of effective strategies to initiate men's involvement in gender-based violence prevention in a global sample. (United States)

    Casey, Erin A; Leek, Cliff; Tolman, Richard M; Allen, Christopher T; Carlson, Juliana M


    As engaging men in gender-based violence prevention efforts becomes an increasingly institutionalised component of gender equity work globally, clarity is needed about the strategies that best initiate male-identified individuals' involvement in these efforts. The purpose of this study was to examine the perceived relevance and effectiveness of men's engagement strategies from the perspective of men around the world who have organised or attended gender-based violence prevention events. Participants responded to an online survey (available in English, French and Spanish) and rated the effectiveness of 15 discrete engagement strategies derived from earlier qualitative work. Participants also provided suggestions regarding strategies in open-ended comments. Listed strategies cut across the social ecological spectrum and represented both venues in which to reach men, and the content of violence prevention messaging. Results suggest that all strategies, on average, were perceived as effective across regions of the world, with strategies that tailor messaging to topics of particular concern to men (such as fatherhood and healthy relationships) rated most highly. Open-ended comments also surfaced tensions, particularly related to the role of a gender analysis in initial men's engagement efforts. Findings suggest the promise of cross-regional adaptation and information sharing regarding successful approaches to initiating men's anti-violence involvement.

  12. Effectively engaging stakeholders and the public in developing violence prevention messages. (United States)

    Boyko, Jennifer A; Wathen, C Nadine; Kothari, Anita


    Preventing family violence requires that stakeholders and the broader public be involved in developing evidence-based violence prevention strategies. However, gaps exist in between what we know (knowledge), what we do (action), and the structures supporting practice (policy). We discuss the broad challenge of mobilizing knowledge-for-action in family violence, with a primary focus on the issue of how stakeholders and the public can be effectively engaged when developing and communicating evidence-based violence prevention messages. We suggest that a comprehensive approach to stakeholder and public engagement in developing violence prevention messages includes: 1) clear and consistent messaging; 2) identifying and using, as appropriate, lessons from campaigns that show evidence of reducing specific types of violence; and 3) evidence-informed approaches for communicating to specific groups. Components of a comprehensive approach must take into account the available research evidence, implementation feasibility, and the context-specific nature of family violence. While strategies exist for engaging stakeholders and the public in messaging about family violence prevention, knowledge mobilization must be informed by evidence, dialogue with stakeholders, and proactive media strategies. This paper will be of interest to public health practitioners or others involved in planning and implementing violence prevention programs because it highlights what is known about the issue, potential solutions, and implementation considerations.

  13. Injury and violence prevention policy: celebrating our successes, protecting our future. (United States)

    Koné, Rebecca Greco; Zurick, Elizabeth; Patterson, Sara; Peeples, Amy


    Policy strategies for injury and violence prevention influence systems development, organizational change, social norms, and individual behavior to improve the health and safety of a population. Injury and violence prevention professionals should consider how their issues resonate with various audiences, including policy makers, the public, and other decision makers. As the cost of healthcare continues to rise and greater demands are placed on the healthcare system, the use of public health policy becomes increasingly critical to protect the public's health and prevent injury and violence and its related morbidities and disabilities (Degutis, 2011). This article highlights some impactful policy successes from the field, allows us to reflect on the Injury Center's 20th anniversary, and describes steps to address injuries and violence into the future. The purpose of this paper is to discuss policy as a public health strategy and the critical role it plays in injury and violence prevention. Published by Elsevier Ltd.

  14. Monitoring the multi-faceted problem of youth violence: the Asian/Pacific Islander Youth Violence Prevention Center's surveillance system. (United States)

    Sugimoto-Matsuda, Jeanelle J; Hishinuma, Earl S; Momohara, Christie-Brianna K; Rehuher, Davis; Soli, Fa'apisa M; Bautista, Randy Paul M; Chang, Janice Y


    Youth violence (YV) is a complex public health issue that spans geographic, ethnic, and socioeconomic lines. The Asian/Pacific Islander Youth Violence Prevention Center conducts qualitative and quantitative research on YV in Hawai'i. A critical element in YV prevention involves measuring YV and its risk-protective factors to determine the scope of the problem and to monitor changes across time. Under the Asian/Pacific Islander Youth Violence Prevention Center's (APIYVPC's) surveillance umbrella, a variety of methodologies are utilized. The major forms of active surveillance are a School-Wide Survey for youth, and a Safe Community Household Survey for adults. A variety of secondary data sources are accessed, such as the Centers for Disease Control and Prevention (Youth Risk Behavior Surveillance System), the Hawai'i State Department of the Attorney General, the Hawai'i State Department of Education, and the Hawai'i State Department of Health. State data are especially important for the Center, because most of these sources disaggregate ethnicity data for Asian Americans/Pacific Islanders. This paper details the surveillance methodologies utilized by the APIYVPC to monitor YV in one specific community and in Hawai'i, in comparison to the rest of the State and nation. Empirical results demonstrate the utility of each methodology and how they complement one another. Individually, each data source lends valuable information to the field of YV prevention; however, collectively, the APIYVPC's surveillance methods help to paint a more complete picture regarding violence rates and the relationship between YV and its risk-protective factors, particularly for minority communities.

  15. Violence Prevention in Schools: A Case Study of the Thurgood Marshall Academy Public Charter High School. Final Report (United States)

    Fontaine, Jocelyn; Debus-Sherrill, Sara; Downey, P. Mitchell; Lowry, Samantha S.


    This report is based on research conducted by the Urban Institute's Justice Policy Center on the violence prevention activities taking place at the Thurgood Marshall Academy Public Charter High School during the 2008-2009 school year. Based on an assessment of the school's violence prevention approach using qualitative and quantitative data from…

  16. 25 CFR 63.34 - How are Indian child protection and family violence prevention program funds distributed? (United States)


    ... 25 Indians 1 2010-04-01 2010-04-01 false How are Indian child protection and family violence... INTERIOR TRIBAL GOVERNMENT INDIAN CHILD PROTECTION AND FAMILY VIOLENCE PREVENTION Indian Child Protection and Family Violence Prevention Program § 63.34 How are Indian child protection and family violence...

  17. 25 CFR 63.35 - How may Indian child protection and family violence prevention program funds be used? (United States)


    ... 25 Indians 1 2010-04-01 2010-04-01 false How may Indian child protection and family violence... INTERIOR TRIBAL GOVERNMENT INDIAN CHILD PROTECTION AND FAMILY VIOLENCE PREVENTION Indian Child Protection and Family Violence Prevention Program § 63.35 How may Indian child protection and family violence...

  18. Commentary on Foubert, Godin, & Tatum (2010): The Evolution of Sexual Violence Prevention and the Urgency for Effectiveness (United States)

    Tharp, Andra Teten; DeGue, Sarah; Lang, Karen; Valle, Linda Anne; Massetti, Greta; Holt, Melissa; Matjasko, Jennifer


    Foubert, Godin, and Tatum describe qualitative effects among college men of The Men's Program, a one-session sexual violence prevention program. This article and the program it describes are representative of many sexual violence prevention programs that are in practice and provide an opportunity for a brief discussion of the development and…

  19. 25 CFR 63.33 - What must an application for Indian child protection and family violence prevention program funds... (United States)


    ... Child Protection and Family Violence Prevention Program § 63.33 What must an application for Indian... 25 Indians 1 2010-04-01 2010-04-01 false What must an application for Indian child protection and family violence prevention program funds include? 63.33 Section 63.33 Indians BUREAU OF INDIAN AFFAIRS...

  20. Assessing Injury and Violence Prevention in North Carolina’s Local Health Departments (United States)

    Mouw, Mary S.; Counts, Jennifer; Fordham, Corinne; Francis, Molly Merrill; Bach, Laura E.; Maman, Suzanne; Proescholdbell, Scott K.


    Context Injury and violence-related morbidity and mortality present a major public health problem in North Carolina. However, the extent to which local health departments (LHDs) engage in injury and violence prevention (IVP) is not well described. Objectives 1) Provide a baseline assessment of IVP in the state’s LHDs, describing capacity, priorities, challenges, and the degree to which programs are data-driven and evidence-based. 2) Describe a replicable, cost-effective method for systematic assessment of regional IVP. Design An observational, cross-sectional study, through a survey of NC’s 85 LHDs. Results Representatives from 77 LHDs (91%) responded. Nearly a third (n=23, 30%) reported no staff were familiar with evidence-based interventions in IVP; over a third (n=29, 38%) reported their LHD did not train staff in IVP. Almost half (n=37, 46%) had no dedicated funding. On average, respondents said about half of their programs were evidence-based; however, there was marked variation (mean 52%, SD = 41). Many collaborated with diverse partners including law enforcement, hospitals, and community-based organizations. There was discordance between injury and violence burden and programming. Overall, 53% of issues listed as top local problems were not targeted in their LHDs’ programs. Conclusions Despite funding constraints, NC’s LHDs are engaged in a broad range of IVP activities. Programming did not uniformly address state injury and violence priorities, however, nor local injury and violence burden. Staff need training in evidence-based strategies targeting priority areas. Multi-sector partnerships were common and increased LHDs’ capacity. These findings are actionable at the state and local-level. PMID:27621337

  1. Assessing Injury and Violence Prevention in North Carolina's Local Health Departments. (United States)

    Mouw, Mary S; Counts, Jennifer; Fordham, Corinne; Francis, Molly Merrill; Bach, Laura E; Maman, Suzanne; Proescholdbell, Scott K


    Injury and violence-related morbidity and mortality present a major public health problem in North Carolina. However, the extent to which local health departments (LHDs) engage in injury and violence prevention (IVP) has not been well described. One objective of the current study is to provide a baseline assessment of IVP in the state's LHDs, describing capacity, priorities, challenges, and the degree to which programs are data-driven and evidence-based. The study will also describe a replicable, cost-effective method for systematic assessment of regional IVP. This is an observational, cross-sectional study that was conducted through a survey of North Carolina's 85 LHDs. Representatives from 77 LHDs (91%) responded. Nearly one-third (n = 23; 30%) reported that no staff members were familiar with evidence-based interventions in IVP, and over one-third (n = 29; 38%) reported that their LHD did not train staff in IVP. Almost one-half (n = 37; 48%) had no dedicated funding for IVP. On average, respondents said that about half of their programs were evidence-based; however, there was marked variation (mean, 52%; standard deviation = 41). Many collaborated with diverse partners including law enforcement, hospitals, and community-based organizations. There was discordance between injury and violence burden and programming. Overall, 53% of issues listed as top local problems were not targeted in their LHDs' programs. Despite funding constraints, North Carolina's LHDs engaged in a broad range of IVP activities. However, programming did not uniformly address state injury and violence priorities, nor local injury and violence burden. Staff members need training in evidence-based strategies that target priority areas. Multisector partnerships were common and increased LHDs' capacity. These findings are actionable at the state and local level. ©2016 by the North Carolina Institute of Medicine and The Duke Endowment. All rights reserved.

  2. The Structure of Policy Networks for Injury and Violence Prevention in 15 US Cities (United States)

    Jonson-Reid, Melissa; Carothers, Bobbi J.; Fowler, Patrick


    Objectives: Changes in policy can reduce violence and injury; however, little is known about how partnerships among organizations influence policy development, adoption, and implementation. To understand partnerships among organizations working on injury and violence prevention (IVP) policy, we examined IVP policy networks in 15 large US cities. Methods: In summer 2014, we recruited 15 local health departments (LHDs) to participate in the study. They identified an average of 28.9 local partners (SD = 10.2) working on IVP policy. In late 2014, we sent survey questionnaires to 434 organizations, including the 15 LHDs and their local partners, about their partnerships and the importance of each organization to local IVP policy efforts; 319 participated. We used network methods to examine the composition and structure of the policy networks. Results: Each IVP policy network included the LHD and an average of 21.3 (SD = 6.9) local partners. On average, nonprofit organizations constituted 50.7% of networks, followed by government agencies (26.3%), schools and universities (11.8%), coalitions (11.2%), voluntary organizations (9.6%), hospitals (8.5%), foundations (2.2%), and for-profit organizations (0.7%). Government agencies were perceived as important by the highest proportion of partners. Perceived importance was significantly associated with forming partnerships in most networks; odds ratios ranged from 1.07 (95% CI, 1.02-1.13) to 2.35 (95% CI, 1.68-3.28). Organization type was significantly associated with partnership formation in most networks after controlling for an organization’s importance to the network. Conclusions: Several strategies could strengthen local IVP policy networks, including (1) developing connections with partners from sectors that are not well integrated into the networks and (2) encouraging indirect or less formal connections with important but missing partners and partner types. PMID:28426291

  3. The Structure of Policy Networks for Injury and Violence Prevention in 15 US Cities. (United States)

    Harris, Jenine K; Jonson-Reid, Melissa; Carothers, Bobbi J; Fowler, Patrick

    Changes in policy can reduce violence and injury; however, little is known about how partnerships among organizations influence policy development, adoption, and implementation. To understand partnerships among organizations working on injury and violence prevention (IVP) policy, we examined IVP policy networks in 15 large US cities. In summer 2014, we recruited 15 local health departments (LHDs) to participate in the study. They identified an average of 28.9 local partners (SD = 10.2) working on IVP policy. In late 2014, we sent survey questionnaires to 434 organizations, including the 15 LHDs and their local partners, about their partnerships and the importance of each organization to local IVP policy efforts; 319 participated. We used network methods to examine the composition and structure of the policy networks. Each IVP policy network included the LHD and an average of 21.3 (SD = 6.9) local partners. On average, nonprofit organizations constituted 50.7% of networks, followed by government agencies (26.3%), schools and universities (11.8%), coalitions (11.2%), voluntary organizations (9.6%), hospitals (8.5%), foundations (2.2%), and for-profit organizations (0.7%). Government agencies were perceived as important by the highest proportion of partners. Perceived importance was significantly associated with forming partnerships in most networks; odds ratios ranged from 1.07 (95% CI, 1.02-1.13) to 2.35 (95% CI, 1.68-3.28). Organization type was significantly associated with partnership formation in most networks after controlling for an organization's importance to the network. Several strategies could strengthen local IVP policy networks, including (1) developing connections with partners from sectors that are not well integrated into the networks and (2) encouraging indirect or less formal connections with important but missing partners and partner types.

  4. Nursing student evaluation of NIOSH workplace violence prevention for nurses online course. (United States)

    Brann, Maria; Hartley, Dan


    As primary targets of workplace violence in health care settings, nurses may suffer negative physical and psychological consequences. NIOSH created an online course to educate nurses about violence prevention techniques. A mixed-methods approach assessed workplace violence awareness and knowledge among nursing students. A pre/post/post-test survey and focus group discussions evaluated participant awareness and knowledge, assessed course design, and solicited recommendations for increasing participation and strategies for improving message retention. The mean awareness scores differed significantly between pre-course and both post-course time points (Wilk's λ=0.319, F(2, 46)=49.01, pviolence from pre-course scores (M=0.75, SD=0.438) to immediate post-course (M=2.13, SD=0.789) and four-week post-course (M=1.96, SD=0.771) scores on a 3-item measure. Similarly, mean knowledge scores increased between pre-course and both post-course time points (Wilk's λ=0.495, F(1.57, 73.66)=37.26, pviolence from pre-course scores (M=6.65, SD=1.45) to immediate post-course (M=8.56, SD=1.32) and four-week post-course (M=8.19, SD=1.42) scores on a 10-item measure. Qualitative data from the focus groups reinforced the quantitative findings. Participants citing benefits from the content strongly recommended including the course in nursing curriculums. Incorporating the course early in the nursing educational experience will better prepare students to deal with workplace violence when they enter health care professions. The results indicate that NIOSH and its partners created an effective online workplace violence awareness and prevention course. Practical applications: Nursing students and professionals can be effectively educated about workplace violence using an online format. Copyright © 2016 National Safety Council and Elsevier Ltd. All rights reserved.

  5. Conceptualizing the Engaging Bystander Approach to Sexual Violence Prevention on College Campuses (United States)

    McMahon, Sarah; Postmus, Judy L.; Koenick, Ruth Anne


    Bystander intervention offers promise as a sexual violence prevention tool for student affairs administrators on college campuses, but the conceptualization and definition of the approach is in its infancy and needs further development. In an effort to emphasize the potential role of bystanders in the primary prevention of sexual violence, we put…

  6. Annotated Bibliography of Alcohol, Other Drug, and Violence Prevention Resources, 2006-2008 (United States)

    Segars, Lance, Ed.; Akinola, Olayinka, Ed.


    The U.S. Department of Education's Higher Education Center for Alcohol and Other Drug Abuse and Violence Prevention has developed this annotated bibliography to provide those interested in prevention at colleges and universities--and in surrounding communities--with a ready reference of current, important, and available information resources.…

  7. Violence Prevention at Thurgood Marshall Academy Public Charter High School. Summary Brief (United States)

    Fontaine, Jocelyn; Debus-Sherrill, Sara; Downey, P. Mitchell; Lowry, Samantha S.


    This summary brief is based on research conducted by the Urban Institute's Justice Policy Center on the violence prevention activities taking place at the Thurgood Marshall Academy Public Charter High School during the 2008-2009 school year. Researchers from the Justice Policy Center conducted an assessment of the school's violence prevention…

  8. Optimizing Violence Prevention Programs: An Examination of Program Effectiveness among Urban High School Students (United States)

    Thompkins, Amanda C.; Chauveron, Lisa M.; Harel, Ofer; Perkins, Daniel F.


    Background: While demand for youth violence prevention programs increases, the ability of the school-day schedule to accommodate their time requirements has diminished. Viable school-based prevention programs must strike a balance between brevity and effectiveness. This article reports results from an effectiveness trial of a 12-session…

  9. Improving Interactions: The Effects of Implementing the Fight-Free Schools Violence Prevention Program (United States)

    Fahsl, Allison J.; Luce, Amanda E.


    The purpose of this study was to determine whether the Fight-Free Schools violence prevention process had an effect on the frequency of aggressive acts of elementary school students. Participants included approximately 600 students ranging from Kindergarten to 5th grade in a suburban school in the Midwestern United States. Data were collected over…

  10. National Strategy for Violence Prevention in the Austrian Public School System: Development and Implementation (United States)

    Spiel, Christiane; Strohmeier, Dagmar


    As a result of a quick succession of several spectacular events in schools, and the ensuing public discussion on the high rates of bullying in Austria, a national strategy for violence prevention in schools and preschools has been developed. In formulating the strategy, a systematic procedure involving international experts and a number of local…

  11. The Effects of a Violence Prevention Program on Alternative High School Students (United States)

    Triplett, Carla A.


    This study addressed the effectiveness of a violence prevention program in an inner-city alternative school setting. The researcher, an administrator at the school, used a prepackaged curriculum targeting lessons on violence in an eight-week study with the entire school population. Students met bi-weekly with a team of two teachers to review and…

  12. Implementation and Evaluation of a Youth Violence Prevention Program for Adolescents (United States)

    Regan, Mary Elana


    Youth violence in the city of Philadelphia, PA, has reached epidemic proportions. The majority of homicides related to gun violence is most prevalent among African American males aged 19 to 24 years. Therefore, it is essential to implement youth violence prevention programs to a target population several years younger than this age group to…

  13. Doorways III: Teacher Training Manual on School-Related Gender-Based Violence Prevention and Response (United States)

    US Agency for International Development, 2009


    The Doorways training program was designed by the U.S. Agency for International Development (USAID)-funded Safe Schools Program (Safe Schools) to enable teachers, community members and students to prevent and respond to school-related gender-based violence (SRGBV). Teachers can play a central role in violence prevention, and they can also help…

  14. A School-Based Violence Prevention Model for At-Risk Eighth Grade Youth. (United States)

    Rollin, Stephen A.; Kaiser-Ulrey, Cheryl; Potts, Isabelle; Creason, Alia Haque


    Examines the effectiveness of a school and community-based violence prevention program for at-risk eighth-grade students. School officials matched intervention students with community-based mentors in an employment setting. Findings suggest that mentored students had significant reductions in total number and days of suspensions, days of sanction,…

  15. Reconstructing Masculinity in the Locker Room: The Mentors in Violence Prevention Project. (United States)

    Katz, Jackson


    The Mentors in Violence Prevention Project seeks to reduce violence against women by inspiring male athletes and other models of traditional masculinity to challenge norms that equate strength in men with dominance over women and to use their influence for positive behavior change. (SK)

  16. Play for Peace as a Violence Prevention Model: Achieving "Voluntad y Convivencia" (United States)

    Gass, Michael; Gough, Sarah; Armas, Andres; Dolcino, Cristina


    Violence prevention is a key focus for many intervention programs, yet little is known about how or why certain programs are able to successfully produce effective prevention efforts. The purpose of this study was to identify the essential elements of the Play for Peace (PFP) program, how it creates change in participants, and how it is…

  17. Violence Prevention and School Climate Reform. School Climate Brief, Number 5 (United States)

    Nader, Kathleen


    Research has demonstrated that a positive school climate is an essential part of violence prevention. Many factors influence the association between school climate and behavioral outcomes. Positive school climate alone cannot prevent all variables that may contribute to the expression of aggression. Nevertheless, positive school climates influence…

  18. Living Peace: An Exploration of Experiential Peace Education, Conflict Resolution and Violence Prevention Programs for Youth (United States)

    Hettler, Shannon; Johnston, Linda M.


    The authors review the types of experiential peace education programs available to teens in the US and provide a classification guide for educators, parents, other concerned adults and teens who may be interested in developing conflict, peace and/or violence prevention knowledge, skills and attitudes. The authors identify experiential programs in…

  19. The Begun Center for Violence Prevention Research and Education at Case Western Reserve University (United States)

    Flannery, Daniel J.; Singer, Mark I.


    Established in the year 2000, the Begun Center for Violence Prevention Research and Education is a multidisciplinary center located at a school of social work that engages in collaborative, community-based research and evaluation that spans multiple systems and disciplines. The Center currently occupies 4,200 sq. ft. with multiple offices and…

  20. New Technology Tools: Using Social Media for Alcohol, Drug Abuse, and Violence Prevention. Prevention Update (United States)

    Higher Education Center for Alcohol, Drug Abuse, and Violence Prevention, 2011


    When it comes to using social media technology for alcohol, drug abuse, and violence prevention, Thomas Workman, at Baylor College of Medicine's John M. Eisenberg Center for Clinical Decisions and Communications Science, points out that social media is interactive. This means that a person is entering a conversation rather than a declaration, and…

  1. Meta-Analysis on Dating Violence Prevention among Middle and High Schools (United States)

    Ting, Siu-Man Raymond


    Meta-analysis was applied to study the empirical research from 1990-2007 regarding the effectiveness of the dating violence prevention programs in middle and high schools on students' knowledge and attitudes. The results show that overall the program participants improved their knowledge and attitudes towards dating violence. Implications for…

  2. Integrating Early Child Development and Violence Prevention Programs: A Systematic Review (United States)

    Efevbera, Yvette; McCoy, Dana C.; Wuermli, Alice J.; Betancourt, Theresa S.


    Limited evidence describes promoting development and reducing violence in low- and middle-income countries (LMICs), a missed opportunity to protect children and promote development and human capital. This study presents a systematic literature review of integrated early childhood development plus violence prevention (ECD+VP) interventions in…

  3. Essential elements for community engagement in evidence-based youth violence prevention. (United States)

    Miao, Tai-An; Umemoto, Karen; Gonda, Deanna; Hishinuma, Earl S


    In the field of youth violence prevention, there has been increasing emphasis on "evidence based" programs and principles shown through scientific research as reaching their intended outcomes. Community mobilization and engagement play a critical role in many evidence-based programs and strategies, as it takes a concerted effort among a wide range of people within a community to alter behavior and maintain behavioral change. How do concerned individuals and groups within a community engage others within and outside of that community to effectively plan, develop and implement appropriate EB programs as well as evaluate the outcomes and impacts of locally developed programs yet to be proven? The authors discuss five elements essential for community engagement in evidence-based youth violence prevention based on their work in a university-community partnership through the Asian/Pacific Islander Youth Violence Prevention Center (API Center), a National Academic Center for Excellence on Youth Violence Prevention Center supported by the Centers for Disease Control and Prevention. They include: (a) aligning EBPs with a community's shared vision and values; (b) establishing an inclusive environment for the planning, implementation and evaluation of EBPs; (c) nurturing collaboration for increased effectiveness and efficacy of EBPs; (d) building adequate leadership and community capacity to develop and sustain EBPs; and (e) building a learning community for evaluation and self-reflection. The authors propose placing greater emphasis on "evaluative thinking" and organizational capacity for evaluation as we pursue evidence-based practices for youth violence prevention. This is especially important for ethnic groups for which an evidence base is not well established.

  4. Prioritizing the School Environment in School Violence Prevention Efforts (United States)

    Johnson, Sarah Lindstrom; Burke, Jessica G.; Gielen, Andrea C.


    Background: Numerous studies have demonstrated an association between characteristics of the school environment and the likelihood of school violence. However, little is known about the relative importance of various characteristics of the school environment or their differential impact on multiple violence outcomes. Methods: Primarily…

  5. Social Disorganisation, Social Capital and Violence Prevention in ...

    African Journals Online (AJOL)

    Not only does social disorganisation lead to the breakdown of informal social control in communities and families, but it also weakens the capacities of communities to protect themselves against crime. Survey findings suggest that poor and socially disorganised communities are increasingly resorting to social isolation as a ...

  6. Factors Related to Teenage Dating Violence Prevention Programming in Schools (United States)

    Black, Beverly M.; Hawley, Alicia; Hoefer, Richard; Barnett, Tracey M.


    The Children's Safety Network has identified teenage dating violence (TDV) as a public health problem and called for effective prevention programs to address the issue. This study used resource dependence theory to examine factors that relate to domestic violence shelters' in-school efforts to prevent TDV. A national survey was sent to domestic…

  7. Commentary: evidence to guide gun violence prevention in America. (United States)

    Webster, Daniel W


    Gun violence is a major threat to the public's health and safety in the United States. The articles in this volume's symposium on gun violence reveal the scope of the problem and new trends in mortality rates from gunfire. Leading scholars synthesize research evidence that demonstrates the ability of numerous policies and programs-each consistent with lessons learned from successful efforts to combat public health problems-to prevent gun violence. Each approach presents challenges to successful implementation. Future research should inform efforts to assess which approaches are most effective and how to implement evidence-based interventions most effectively.

  8. Policy statement--Role of the pediatrician in youth violence prevention. (United States)


    Youth violence continues to be a serious threat to the health of children and adolescents in the United States. It is crucial that pediatricians clearly define their role and develop the appropriate skills to address this threat effectively. From a clinical perspective, pediatricians should become familiar with Connected Kids: Safe, Strong, Secure, the American Academy of Pediatrics' primary care violence prevention protocol. Using this material, practices can incorporate preventive education, screening for risk, and linkages to community-based counseling and treatment resources. As advocates, pediatricians may bring newly developed information regarding key risk factors such as exposure to firearms, teen dating violence, and bullying to the attention of local and national policy makers. This policy statement refines the developing role of pediatricians in youth violence prevention and emphasizes the importance of this issue in the strategic agenda of the American Academy of Pediatrics.

  9. A Meta-Analysis of Empirically Tested School-Based Dating Violence Prevention Programs

    Directory of Open Access Journals (Sweden)

    Sarah R. Edwards


    Full Text Available Teen dating violence prevention programs implemented in schools and empirically tested were subjected to meta-analysis. Eight studies met criteria for inclusion, consisting of both within and between designs. Overall, the weighted mean effect size (ES across studies was significant, ESr = .11; 95% confidence interval (CI = [.08, .15], p < .0001, showing an overall positive effect of the studied prevention programs. However, 25% of the studies showed an effect in the negative direction, meaning students appeared to be more supportive of dating violence after participating in a dating violence prevention program. This heightens the need for thorough program evaluation as well as the need for decision makers to have access to data about the effectiveness of programs they are considering implementing. Further implications of the results and recommendations for future research are discussed.

  10. Healthy People 2020 Objectives for Violence Prevention and the Role of Nursing. (United States)

    Simon, Thomas R; Hurvitz, Kimberly


    Violence, including child maltreatment, youth violence, intimate partner violence, and sexual violence, is a significant public health problem in the United States. A public health approach can help providers understand the health burden from violence, evaluate evidence for prevention strategies, and learn where to turn for information about planning and implementing prevention strategies for this preventable problem. For the past three decades, the U.S. Department of Health and Human Services has published "Healthy People" objectives for the next decade. The Healthy People 2020 initiative includes 13 measurable objectives related to violence prevention, one of which was selected as a Healthy People 2020 Leading Health Indicator. Progress to achieve these objectives can save thousands of lives, reduce the suffering of victims and their families, and decrease financial cost to the law enforcement and healthcare systems. The role that nurses can and do play in violence prevention is critical and extends beyond just caring for victims to also include preventing violence before it happens. This article summarizes the violence prevention objectives in Healthy People 2020 and the resources for prevention available to support nurses and others as they move prevention efforts forward in communities to stop violence before it starts.

  11. Cultural context of school communities in rural Hawaii to inform youth violence prevention. (United States)

    Affonso, Dyanne D; Mayberry, Linda; Shibuya, June Y; Archambeau, Olga G; Correa, Mary; Deliramich, Aimee N; Frueh, B Christopher


    Escalation of youth violence within a large geographic school-complex area in southeastern rural Hawaii became a major problem in 2006. How cultural forces impact the problem was an impetus to examine youth violence from perspectives of adults and children in rural communities. Gathering these data was an essential first step toward school-based youth violence prevention program development. Eight focus groups involving 86 community stakeholders included 51 adults (parent, teachers, school staff, community leaders) and 35 children aged 8-15 years old (3rd- to 10-th grade). Qualitative narrative analysis elicited major themes. Five themes emerged: (1) School-community violence takes on many forms that become entrenched in local culture. (2) Disintegration of community resources and a sense of learned helplessness underlie the escalation of youth violence. (3) Inadequate role modeling coupled with behavioral ambivalence among adults has sustained a climate of local cultural acceptance with youth violence. (4) Connection to cultural values has diminished, leading to a sense of loss in cultural identity among students. (5) Cultural values and practices are potential strategies for youth violence prevention. Cultural and community contextual factors contributed to youth violence in rural Hawaiian communities. Study implications include the need to further investigate the impact of vigilant, community involvement of stakeholders in school-based youth violence prevention program development. Cultural revitalization at family, school, and community levels may be critical success factors of such programs.

  12. Implementation Measurement for Evidence-Based Violence Prevention Programs in Communities. (United States)

    Massetti, Greta M; Holland, Kristin M; Gorman-Smith, Deborah


    Increasing attention to the evaluation, dissemination, and implementation of evidence-based programs (EBPs) has led to significant advancements in the science of community-based violence prevention. One of the prevailing challenges in moving from science to community involves implementing EBPs and strategies with quality. The CDC-funded National Centers of Excellence in Youth Violence Prevention (YVPCs) partner with communities to implement a comprehensive community-based strategy to prevent violence and to evaluate that strategy for impact on community-wide rates of violence. As part of their implementation approach, YVPCs document implementation of and fidelity to the components of the comprehensive youth violence prevention strategy. We describe the strategies and methods used by the six YVPCs to assess implementation and to use implementation data to inform program improvement efforts. The information presented describes the approach and measurement strategies employed by each center and for each program implemented in the partner communities. YVPCs employ both established and innovative strategies for measurement and tracking of implementation across a broad range of programs, practices, and strategies. The work of the YVPCs highlights the need to use data to understand the relationship between implementation of EBPs and youth violence outcomes.

  13. Case Study of a School-Based Universal Dating Violence Prevention Program

    Directory of Open Access Journals (Sweden)

    Michele Cascardi


    Full Text Available Evaluation of universal dating violence prevention programs has rapidly expanded in the past two decades. Many programs demonstrate change in attitudes supportive of dating violence, and a few show evidence of behavior change; however, detailed analysis of process and fidelity of program implementation is generally neglected. An important goal of prevention research is to identify successful initiatives that can be replicated and disseminated in the field. The purpose of the current case study is to document the implementation process of a middle school–based dating violence prevention curriculum in economically disadvantaged urban neighborhoods. Particular attention is given to the school context, such as the process of school and teacher recruitment, the program model, and classroom implementation of the dating violence prevention program in four areas: teacher training, student outcomes, program fidelity, and student engagement. Nine health and physical education teachers from six urban middle schools participated. Results describe effective strategies to secure school participation and engagement, and provide evidence regarding methods to train health and physical education teachers in low-income, urban neighborhoods. Furthermore, classroom observations demonstrate that teachers successfully implemented the five-lesson curriculum, which resulted in positive student outcomes to prevent dating violence. This case study represents an important step in deepening our understanding of the mechanisms of program delivery.

  14. Multi-College Bystander Intervention Evaluation for Violence Prevention. (United States)

    Coker, Ann L; Bush, Heather M; Fisher, Bonnie S; Swan, Suzanne C; Williams, Corrine M; Clear, Emily R; DeGue, Sarah


    The 2013 Campus Sexual Violence Elimination Act requires U.S. colleges to provide bystander-based training to reduce sexual violence, but little is known about the efficacy of such programs for preventing violent behavior. This study provides the first multiyear evaluation of a bystander intervention's campus-level impact on reducing interpersonal violence victimization and perpetration behavior on college campuses. First-year students attending three similarly sized public university campuses were randomly selected and invited to complete online surveys in the spring terms of 2010-2013. On one campus, the Green Dot bystander intervention was implemented in 2008 (Intervention, n=2,979) and two comparison campuses had no bystander programming at baseline (Comparison, n=4,132). Data analyses conducted in 2014-2015 compared violence rates by condition over the four survey periods. Multivariable logistic regression was used to estimate violence risk on Intervention relative to Comparison campuses, adjusting for demographic factors and time (2010-2013). Interpersonal violence victimization rates (measured in the past academic year) were 17% lower among students attending the Intervention (46.4%) relative to Comparison (55.7%) campuses (adjusted rate ratio=0.83; 95% CI=0.79, 0.88); a similar pattern held for interpersonal violence perpetration (25.5% in Intervention; 32.2% in Comparison; adjusted rate ratio=0.79; 95% CI=0.71, 0.86). Violence rates were lower on Intervention versus Comparison campuses for unwanted sexual victimization, sexual harassment, stalking, and psychological dating violence victimization and perpetration (pSexual Violence Elimination Act bystander training requirements. Copyright © 2016 American Journal of Preventive Medicine. All rights reserved.

  15. Estimating Costs and Benefits Associated with Evidence-Based Violence Prevention: Four Case Studies Based on the Fourth R Program

    Directory of Open Access Journals (Sweden)

    Claire V. Crooks


    Full Text Available Teen violence in dating and peer relationships has huge costs to society in numerous areas including health care, social services, the workforce and the justice system. Physical, psychological, and sexual abuse have long-lasting ramifications for the perpetrators as well as the victims, and for the families involved on both sides of that equation. An effective violence prevention program that is part of a school’s curriculum is beneficial not only for teaching teenagers what is appropriate behaviour in a relationship, but also for helping them break the cycle of violence which may have begun at home with their own maltreatment as children. The Fourth R program is an efficacious violence prevention program that was developed in Ontario and has been implemented in schools throughout Canada and the U.S. Covering relationship dynamics common to dating violence as well as substance abuse, peer violence and unsafe sex, the program can be adapted to different cultures and to same-sex relationships. The program, which gets its name from the traditional 3Rs — reading, ’riting and ’rithmetic — offers schools the opportunity to provide effective programming for teens to reduce the likelihood of them using relationship for violence as they move into adulthood. The federal government has estimated that the societal costs of relationship violence amount to more than $7 billion. These costs can continue to be incurred through the legal and health-care systems as the ripple effects of violence play out over the years, even after a relationship has ended. Other types of violence are also costly to society and not just in terms of dollars, but in young lives diverted into criminal activity. Up to 15 per cent of youth who become involved with the justice system grow into serious adult offenders who develop lengthy criminal careers. Yet, research shows that if prevention programs such as the Fourth R can deter just one 14-year-old high-risk juvenile from

  16. Common ground, not a battle ground. Violence prevention at a detoxification facility. (United States)

    Adamson, Mary A; Vincent, Audrey A; Cundiff, Jeff


    This article evaluates the results of a workplace violence prevention program implemented in a Colorado detoxification facility. The program interventions are modeled after federal Occupational Safety and Health Administration guidelines and use theories from both nursing and criminology for philosophy and direction. Serving as its own control, the detoxification facility shares data measured over a 4-year period, demonstrating a sharp decline in assault rates after program implementation. The importance of administrative controls, environmental adjustments, recordkeeping and evaluation, and education and training are emphasized as key components of success. Copyright (c) 2009, SLACK Incorporated.

  17. Technical Packages in Injury and Violence Prevention to Move Evidence into Practice: Systematic Reviews and Beyond (United States)

    Haegerich, Tamara M.; David-Ferdon, Corinne; Noonan, Rita K.; Manns, Brian J.; Billie, Holly C.


    Injury and violence prevention strategies have greater potential for impact when they are based on scientific evidence. Systematic reviews of the scientific evidence can contribute key information about which policies and programs might have the greatest impact when implemented. However, systematic reviews have limitations, such as lack of implementation guidance and contextual information, that can limit the application of knowledge. “Technical packages,” developed by knowledge brokers such as the federal government, nonprofit agencies, and academic institutions, have the potential to be an efficient mechanism for making information from systematic reviews actionable. Technical packages provide information about specific evidence-based prevention strategies, along with the estimated costs and impacts, and include accompanying implementation and evaluation guidance to facilitate adoption, implementation, and performance measurement. We describe how systematic reviews can inform the development of technical packages for practitioners, provide examples of technical packages in injury and violence prevention, and explain how enhancing review methods and reporting could facilitate the use and applicability of scientific evidence. PMID:27604301

  18. Bystander Training as Leadership Training: Notes on the Origins, Philosophy, and Pedagogy of the Mentors in Violence Prevention Model. (United States)

    Katz, Jackson


    This article outlines the origins, philosophy, and pedagogy of the Mentors in Violence Prevention (MVP) program, which has played a significant role in the gender violence prevention field since its inception in 1993. MVP was one of the first large-scale programs to target men for prevention efforts, as well as the first to operate systematically in sports culture and the U.S. military. MVP also introduced the "bystander" approach to the field. MVP employs a social justice, gender-focused approach to prevention. Key features of this approach are described and contrasted with individualistic, events-based strategies that have proliferated on college campuses and elsewhere in recent years.

  19. 25 CFR 63.13 - What does the Indian Child Protection and Family Violence Prevention Act require of the Bureau of... (United States)


    ... 25 Indians 1 2010-04-01 2010-04-01 false What does the Indian Child Protection and Family Violence... GOVERNMENT INDIAN CHILD PROTECTION AND FAMILY VIOLENCE PREVENTION Minimum Standards of Character and Suitability for Employment § 63.13 What does the Indian Child Protection and Family Violence Prevention Act...

  20. 42 CFR 136.404 - What does the Indian Child Protection and Family Violence Prevention Act require of the IHS and... (United States)


    ... Protection and Family Violence Prevention § 136.404 What does the Indian Child Protection and Family Violence... 42 Public Health 1 2010-10-01 2010-10-01 false What does the Indian Child Protection and Family Violence Prevention Act require of the IHS and Indian Tribes or Tribal organizations receiving funds under...

  1. Survey of numerical safety targets for nuclear power plants

    International Nuclear Information System (INIS)

    Kelley, A.P. Jr.; Buttemer, D.R.


    The construction of a nuclear power plant implies, as does the construction of any major public work, the acceptance of a finite degree of risk. This risk can be reduced by an increased investment in engineered safeguards. However, at some level of risk, overinvestment in safety can render the project uneconomical. Because of the desirability of fixing safety standards on an absolute basis, there has long been an interest in establishing numerical risk criteria for the design, construction, and operation of nuclear power plants. Interest in the subject of numerical safety goals has recently been intensified by the Three Mile Island Action Plan. The USNRC has been directed by Congress to develop a national safety goal for reactor regulation. This report summarizes actions which have been historically, and are currently, taking place toward establishing national numerical risk targets for reactor regulation. Emphasis is placed upon actions taken, or currently being taken, by federal regulatory agencies and directly associated advisory bodies

  2. Youth violence prevention comes of age: research, training and future directions. (United States)

    Williams, Kara; Rivera, Lourdes; Neighbours, Robert; Reznik, Vivian


    Youth violence is recognized as a major public health problem in the United States and the world. Over the past ten years, progress has been made in documenting the factors that contribute to violent behavior. Emerging research is deepening our understanding of the individual and societal influences that contribute to and protect against youth violence. However, much work still remains to be done in this field, both in examining potential causes and in designing effective intervention strategies. This chapter highlights specific dimensions of youth violence prevention selected by the authors because these dimensions are the focus of public attention, are emerging as critical issues in the study of youth violence, or have a unique place in the current political and social context. We focus on the developmental pathways to violence, factors that mediate and moderate youth violence, the role of culture and media in youth violence, school-based violence such as school shootings and bullying, and the training of health care professionals.

  3. The Relationship of Abortion and Violence Against Women: Violence Prevention Strategies and Research Needs. (United States)

    Coyle, Catherine T; Shuping, Martha W; Speckhard, Anne; Brightup, Jennie E


    From the perspective of peace psychology, the role of abortion in acts of violence against women is explored, with a focus on violence-prevention strategies. Setting aside the political debate, this task force report takes the conflict-transformation approach of considering all perspectives that have concern for the right of women to avoid being victims of violence. The evidence that victims of Intimate Partner Violence are disproportionately represented in women presenting for abortion suggests a need for screening at clinics. Coerced abortion is a form of violence and has occurred by government policy in China and as a result of other violence against women: sex trafficking and war situations. Sex-selection abortion of female fetuses, referred to as "gendercide," has reached pandemic proportions and caused a gender imbalance in some countries. Psychology, through empirical research, can make unique contributions to understanding the relationship between abortion and violence and in developing prevention strategies.

  4. Violent Extremism, Community-Based Violence Prevention, and Mental Health Professionals. (United States)

    Weine, Stevan M; Stone, Andrew; Saeed, Aliya; Shanfield, Stephen; Beahrs, John; Gutman, Alisa; Mihajlovic, Aida


    New community-based initiatives being developed to address violent extremism in the United States are utilizing mental health services and leadership. This article reviews current approaches to preventing violent extremism, the contribution that mental illness and psychosocial problems can make to violent extremism, and the rationale for integrating mental health strategies into preventing violent extremism. The authors describe a community-based targeted violence prevention model and the potential roles of mental health professionals. This model consists of a multidisciplinary team that assesses at-risk individuals with comprehensive threat and behavioral evaluations, arranges for ongoing support and treatment, conducts follow-up evaluations, and offers outreach, education, and resources for communities. This model would enable mental health professionals in local communities to play key roles in preventing violent extremism through their practice and leadership.

  5. Characteristics of workplace violence prevention training and violent events among home health and hospice care providers. (United States)

    Vladutiu, Catherine J; Casteel, Carri; Nocera, Maryalice; Harrison, Robert; Peek-Asa, Corinne


    In the rapidly growing home health and hospice industry, little is known about workplace violence prevention (WVP) training and violent events. We examined the characteristics of WVP training and estimated violent event rates among 191 home health and hospice care providers from six agencies in California. Training characteristics were identified from the Occupational Safety and Health Administration guidelines. Rates were estimated as the number of violent events divided by the total number of home visit hours. Between 2008 and 2009, 66.5% (n = 127) of providers reported receiving WVP training when newly hired or as recurrent training. On average, providers rated the quality of their training as 5.7 (1 = poor to 10 = excellent). Among all providers, there was an overall rate of 17.1 violent events per 1,000 visit-hours. Efforts to increase the number of home health care workers who receive WVP training and to improve training quality are needed. © 2015 Wiley Periodicals, Inc.

  6. It Could Never Happen Here: Promoting Violence Prevention Education for Emergency Department Nurses. (United States)

    Koller, Lynne H


    HOW TO OBTAIN CONTACT HOURS BY READING THIS ISSUE Instructions: 1.1 contact hours will be awarded by Villanova University College of Nursing upon successful completion of this activity. A contact hour is a unit of measurement that denotes 60 minutes of an organized learning activity. This is a learner-based activity. Villanova University College of Nursing does not require submission of your answers to the quiz. A contact hour certificate will be awarded after you register, pay the registration fee, and complete the evaluation form online at In order to obtain contact hours you must: 1. Read the article, "It Could Never Happen Here: Promoting Violence Prevention Education for Emergency Department Nurses," found on pages 356-360, carefully noting any tables and other illustrative materials that are included to enhance your knowledge and understanding of the content. Be sure to keep track of the amount of time (number of minutes) you spend reading the article and completing the quiz. 2. Read and answer each question on the quiz. After completing all of the questions, compare your answers to those provided within this issue. If you have incorrect answers, return to the article for further study. 3. Go to the Villanova website to register for contact hour credit. You will be asked to provide your name, contact information, and a VISA, MasterCard, or Discover card number for payment of the $20.00 fee. Once you complete the online evaluation, a certificate will be automatically generated. This activity is valid for continuing education credit until July 31, 2019. CONTACT HOURS This activity is co-provided by Villanova University College of Nursing and SLACK Incorporated. Villanova University College of Nursing is accredited as a provider of continuing nursing education by the American Nurses Credentialing Center's Commission on Accreditation. OBJECTIVES Suggest strategies targeted for emergency department nurses to prevent or mitigate their exposure

  7. Integrating Early Child Development and Violence Prevention Programs: A Systematic Review. (United States)

    Efevbera, Yvette; McCoy, Dana C; Wuermli, Alice J; Betancourt, Theresa S


    Limited evidence describes promoting development and reducing violence in low- and middle-income countries (LMICs), a missed opportunity to protect children and promote development and human capital. This study presents a systematic literature review of integrated early childhood development plus violence prevention (ECD+VP) interventions in LMICs. The search yielded 5,244 unique records, of which N = 6 studies met inclusion criteria. Interventions were in Chile, Jamaica, Lebanon, Mexico, Mozambique, and Turkey. Five interventions were parent education programs, including center-based sessions (n = 3) and home visiting (n = 2), while one intervention was a teacher education program. All but one study reported improvements in both child development and maltreatment outcomes. The dearth of evidence on ECD+VP interventions suggests additional research is needed. Integrated ECD+VP interventions may improve multiple child outcome domains while leveraging limited resources in LMICs. © 2018 Wiley Periodicals, Inc.

  8. Logic models as a tool for sexual violence prevention program development. (United States)

    Hawkins, Stephanie R; Clinton-Sherrod, A Monique; Irvin, Neil; Hart, Laurie; Russell, Sarah Jane


    Sexual violence is a growing public health problem, and there is an urgent need to develop sexual violence prevention programs. Logic models have emerged as a vital tool in program development. The Centers for Disease Control and Prevention funded an empowerment evaluation designed to work with programs focused on the prevention of first-time male perpetration of sexual violence, and it included as one of its goals, the development of program logic models. Two case studies are presented that describe how significant positive changes can be made to programs as a result of their developing logic models that accurately describe desired outcomes. The first case study describes how the logic model development process made an organization aware of the importance of a program's environmental context for program success; the second case study demonstrates how developing a program logic model can elucidate gaps in organizational programming and suggest ways to close those gaps.

  9. Impacts of a Violence Prevention Program for Middle Schools: Findings after 3 Years of Implementation. NCEE 2011-4017 (United States)

    Silvia, Suyapa; Blitstein, Jonathan; Williams, Jason; Ringwalt, Chris; Dusenbury, Linda; Hansen, William


    This is the second and final report summarizing findings from an impact evaluation of a violence prevention intervention for middle schools. This report provides findings from the second and third years of the 3-year intervention. The U.S. Department of Education (ED) contracted with RTI International and its subcontractors, Pacific Institute for…

  10. School Violence Prevention: Climate and Moral Perspectives of Sixth through Eighth Grade Students Attending a Southern California Catholic School (United States)

    Gomez, Diane Diaz


    The need for U.S. teachers to better understand School Violence Prevention is growing. Evidence suggests however, that 10 years and 10 billion dollars after the Columbine High School massacre, our public schools are not safer ( There has been an "after the fact" approach to the problem of school violence. After…

  11. Impact of a Universal School-Based Violence Prevention Program on Violent Delinquency: Distinctive Benefits for Youth with Maltreatment Histories (United States)

    Crooks, Claire V.; Scott, Katreena; Ellis, Wendy; Wolfe, David A.


    Objective: Child maltreatment constitutes a strong risk factor for violent delinquency in adolescence, with cumulative experiences of maltreatment creating increasingly greater risk. Our previous work demonstrated that a universal school-based violence prevention program could provide a protective impact for youth at risk for violent delinquency…

  12. Participants' Perceptions of a Violence Prevention Curriculum for Middle School Students: Was It Relevant and Useful? (United States)

    Farrell, Albert D; Mehari, Krista; Mays, Sally; Sullivan, Terri N; Le, Anh-Thuy


    School-based youth violence prevention programs, particularly those focused on middle school students, have generally had limited effects that are often not sustained over time. Although many interventions focus on teaching social-cognitive skills, few studies have explored the extent to which students master these skills, actually use them, and find them effective in dealing with problem situations. This study examined these issues based on interviews with 141 students attending one county and two urban middle schools in classrooms where the Second Step violence prevention program had been implemented. We coded interviews to assess participants' general reactions to the interventions, use of skills, and effectiveness of skills. We also asked participants to describe outcomes they experienced when they used specific skills taught in the intervention in response to problem situations. Participants had generally positive reactions to the intervention. Their suggestions for improving the intervention primarily concerned improving its relevance. Participants described changes they had made based on the intervention, particularly controlling anger and improving relations with others. Their responses indicated that they sometimes misunderstood or misused specific intervention skills, especially problem solving and empathy. Students' descriptions of the outcomes they experienced when using intervention skills were not uniformly positive. This was especially true for situations involving peers such as peer pressure and bullying. These results underscore the need for more intensive efforts to ensure that students master intervention skills and are able to use them correctly. In addition, interventions should address the broader social context (e.g., peers, school) to maximize the effectiveness of skills.

  13. Implementing a Coach-Delivered Dating Violence Prevention Program with High School Athletes. (United States)

    Jaime, Maria Catrina D; McCauley, Heather L; Tancredi, Daniel J; Decker, Michele R; Silverman, Jay G; O'Connor, Brian; Miller, Elizabeth


    Teen dating violence and sexual violence are severe public health problems. Abusive behaviors within the context of dating or romantic relationships are associated with adverse health outcomes. Promoting positive bystander intervention and increasing knowledge of abusive behaviors are promising strategies for preventing dating and sexual violence. Coaching Boys Into Men (CBIM) is an evidence-based, athletic coach-delivered dating violence prevention program that has been shown to increase positive bystander behaviors and reduce abuse perpetration among high school male athletes. Identifying specific barriers and facilitators based on the coaches' experiences with program delivery combined with the coaches' and athletes' program perceptions may help optimize future CBIM implementation and sustainability. Semi-structured interviews with coaches (n = 36) explored the implementers' perspectives on strategies that worked well and potential barriers to program implementation. Ten focus groups with male athletes (n = 39) assessed their experiences with CBIM and the suitability of having their coaches deliver this program. Coaches described using the CBIM training cards and integrating program delivery during practice. Athletes reported coaches routinely delivering the CBIM program and adding their own personal stories or examples to the discussions. Key facilitators to program implementation include support from the violence prevention advocate, the ease of integrating CBIM into the sports season, and using the program materials. Barriers to implementation included finding sufficient time for the program, dynamics of delivering sensitive program content, and participant constraints. Coaches and athletes alike found the program feasible and acceptable to implement within the sports setting. Both coaches and athletes offered insights on the implementation and the feasibility and acceptability of CBIM within school-based athletic programs. These experiences by

  14. Meeting the needs of a community: teaching evidence-based youth violence prevention initiatives to members of strategic communities. (United States)

    Ruffolo, Daria C; Andresen, Pamela A; Winn, Keith L


    Youth violence is among the most serious health threats in the nation today. Violence disproportionately affects young people and people of color. Although the national rates of violent injury and homicide have shown a decline in most regions of the United States over the past 15 years, the rates of violence and related injuries among youth remain unacceptably high. The prevention of youth violence has been a priority of health departments nationwide, including the Cook County Department of Public Health. The goal of this project was to provide key community leaders, social service workers, and nurses within suburban Cook County with educational sessions on Blueprints for Violence Prevention, an initiative to promote evidence-based youth violence prevention programs.

  15. Achieving public health impact in youth violence prevention through community-research partnerships. (United States)

    Massetti, Greta M; Vivolo, Alana M


    Violence is a leading cause of death and disability for U.S. youth. The U.S. Centers for Disease Control and Prevention (CDC)'s Division of Violence Prevention (DVP) is committed to developing communities' capacity to engage in evidence-based youth violence (YV) prevention. We discuss the characteristics of communities that exert influence on the development and epidemiology of YV, and discuss opportunities for how community-research partnerships can enhance efforts to prevent violence in communities. The needs for YV prevention are unique; the nature and phenomenology of violence are community specific. Communities also vary widely in infrastructure and systems to support coordinated, evidence-based YV prevention strategies. These conditions highlight the need for community-research partnerships to enhance community capacity, employ local resources, and engage community members in the research process. DVP is committed to working towards creating communities in which youth are safe from violence. Approaches to YV prevention that emphasize community-research partnerships to build capacity and implement evidence-based prevention strategies can provide a supportive context for achieving that goal.

  16. A Qualitative Meta-Synthesis of Interpersonal Violence Prevention Programs Focused on Males. (United States)

    Taliep, Naiema; Lazarus, Sandy; Naidoo, Anthony V


    Exceptionally high levels of interpersonal violence have triggered a call by many experts for the need to determine effective ways to address the onset and effects of exposure to interpersonal violence. The specific aim of this study was to identify and draw on existing promising practices to make a more informed decision on strategies to develop a contextually relevant intervention that focused on the promotion of positive forms of masculinity to create safety and peace. This study used a qualitative meta-synthesis (QMS) technique to integrate and interpret findings from various intervention studies that focused on males and/or gender. An in-depth literature search yielded a total of 827 papers that met the search criteria. After removal of duplicates, abstract review, and review of the full texts, the subsequent sample for this meta-synthesis included 12 intervention programs and 23 studies. This QMS revealed the value of a comprehensive approach, using multiple strategies, employing participatory and interactive methods, and promoting social mobilization to address interpersonal violence. The promotion of positive forms of masculinity as an interpersonal violence prevention strategy is a much-needed, relatively untapped approach to generating safety and peace for both males and females.

  17. The social justice roots of the Mentors in Violence Prevention model and its application in a high school setting. (United States)

    Katz, Jackson; Heisterkamp, H Alan; Fleming, Wm Michael


    The social justice roots and theory of the Mentors in Violence Prevention (MVP) model is presented, followed by an empirical study examining the influence of MVP in high school settings. Findings reveal students exposed to the MVP model are more likely to see forms of violence as being wrong and are more likely to take actions to intervene than students not exposed to the program. Findings support the premises on which MVP is founded.

  18. The role of collaboration in facilitating policy change in youth violence prevention: a review of the literature. (United States)

    Sugimoto-Matsuda, Jeanelle J; Braun, Kathryn L


    Youth violence remains a serious public health issue nationally and internationally. The social ecological model has been recommended as a framework to design youth violence prevention initiatives, requiring interventions at the micro-, meso-, exo-, and macro-levels. However, documentation of interventions at the macro-level, particularly those that address policy issues, is limited. This study examines a recommendation in the literature that formalized collaborations play a vital role in stimulating macro-level policy change. The purpose of this systematic literature review is to examine existing youth violence prevention collaborations and evaluate their policy-related outcomes. The search found 23 unique collaborations focused on youth violence prevention. These were organized into three groups based on the "catalyst" for action for the collaboration-internal (momentum began within the community), external (sparked by an external agency), or policy (mandated by law). Findings suggest that internally catalyzed collaborations were most successful at changing laws to address youth violence, while both internally and externally catalyzed collaborations successfully attained policy change at the organizational level. A conceptual model is proposed, describing a potential pathway for achieving macro-level change via collaboration. Recommendations for future research and practice are suggested, including expansion of this study to capture additional collaborations, investigation of macro-level changes with a primary prevention focus, and improvement of evaluation, dissemination, and translation of macro-level initiatives.

  19. A qualitative evaluation of the 2005-2011 National Academic Centers of Excellence in Youth Violence Prevention Program. (United States)

    Holland, Kristin M; Vivolo-Kantor, Alana M; Dela Cruz, Jason; Massetti, Greta M; Mahendra, Reshma


    The Centers for Disease Control and Prevention's Division of Violence Prevention (DVP) funded eight National Academic Centers of Excellence (ACEs) in Youth Violence Prevention from 2005 to 2010 and two Urban Partnership Academic Centers of Excellence (UPACEs) in Youth Violence Prevention from 2006 to 2011. The ACEs and UPACEs constitute DVP's 2005-2011 ACE Program. ACE Program goals include partnering with communities to promote youth violence (YV) prevention and fostering connections between research and community practice. This article describes a qualitative evaluation of the 2005-2011 ACE Program using an innovative approach for collecting and analyzing data from multiple large research centers via a web-based Information System (ACE-IS). The ACE-IS was established as an efficient mechanism to collect and document ACE research and programmatic activities. Performance indicators for the ACE Program were established in an ACE Program logic model. Data on performance indicators were collected through the ACE-IS biannually. Data assessed Centers' ability to develop, implement, and evaluate YV prevention activities. Performance indicator data demonstrate substantial progress on Centers' research in YV risk and protective factors, community partnerships, and other accomplishments. Findings provide important lessons learned, illustrate progress made by the Centers, and point to new directions for YV prevention research and programmatic efforts. Published by Elsevier Ltd.

  20. Effects of Violence Prevention Behavior on Exposure to Workplace Violence and Threats: A Follow-Up Study. (United States)

    Gadegaard, Charlotte Ann; Andersen, Lars Peter; Hogh, Annie


    This longitudinal study investigates the relationship between prevention behaviors, that is, enacted violence prevention policies, and exposure to workplace violence and threats across four different high risk work sectors: psychiatry, special schools, eldercare, and the prison and probation services. Logistic regression analysis of a 1-year follow-up sample of 3.016 employees from these four sectors shows that prevention behaviors are significantly and negatively associated with self-reported exposure to workplace violence and threats-in the prison and probation services, eldercare, and in psychiatry, while no significant associations are found for special schools. The results therefore show clear sector differences with regard to the preventive effect of violence prevention behaviors. Furthermore, this multisector comparison suggests that prevention behaviors are more effective in relation to a moderate frequency of violence and threats, and that only top management prevention behavior can prevent very frequent incidents (odds ratio [ OR] = 0.58). This study contributes to the literature by use of a longitudinal design and acceptable response rates, while also simultaneously investigating several high risk sectors. The results imply that when managing workplace violence in high risk areas of human service work, there should be emphasis on the use of violence prevention behaviors from top management, supervisor, and among coworkers. However, type of sector and the frequency of workplace violence should be analyzed to evaluate the potential impact of prevention behaviors.

  1. A qualitative analysis of factors influencing middle school students' use of skills taught by a violence prevention curriculum. (United States)

    Farrell, Albert D; Mehari, Krista R; Kramer-Kuhn, Alison M; Mays, Sally A; Sullivan, Terri N


    This study examined factors that influenced the use of skills taught in a school-based universal violence prevention program. Interviews were conducted with 91 students from two urban schools (83% were African American and 12% multiracial) and 50 students from a nearby county school (52% were White, 32% African American, and 12% multiracial). About half the sample (54%) was male. All had been in sixth grade classrooms where the Second Step (Committee for Children, 1997b) violence prevention curriculum had been implemented earlier in the school year or in the preceding school year. Qualitative analysis of interview transcripts suggested that participants' use of intervention skills was influenced by their beliefs and values, perceived relevance and effectiveness of the skill, issues related to enacting the behavior, and contextual factors. These findings highlight the need for a more intensive and comprehensive effort to address barriers and supports that influence the relevance and impact of school-based violence prevention programs. Copyright © 2015 Society for the Study of School Psychology. Published by Elsevier Ltd. All rights reserved.

  2. A qualitative evaluation of the 2005–2011 National Academic Centers of Excellence in Youth Violence Prevention Program☆ (United States)

    Holland, Kristin M.; Vivolo-Kantor, Alana M.; Cruz, Jason Dela; Massetti, Greta M.; Mahendra, Reshma


    The Centers for Disease Control and Prevention’s Division of Violence Prevention (DVP) funded eight National Academic Centers of Excellence (ACEs) in Youth Violence Prevention from 2005 to 2010 and two Urban Partnership Academic Centers of Excellence (UPACEs) in Youth Violence Prevention from 2006 to 2011. The ACEs and UPACEs constitute DVP’s 2005–2011 ACE Program. ACE Program goals include partnering with communities to promote youth violence (YV) prevention and fostering connections between research and community practice. This article describes a qualitative evaluation of the 2005–2011 ACE Program using an innovative approach for collecting and analyzing data from multiple large research centers via a web-based Information System (ACE-IS). The ACE-IS was established as an efficient mechanism to collect and document ACE research and programmatic activities. Performance indicators for the ACE Program were established in an ACE Program logic model. Data on performance indicators were collected through the ACE-IS biannually. Data assessed Centers’ ability to develop, implement, and evaluate YV prevention activities. Performance indicator data demonstrate substantial progress on Centers’ research in YV risk and protective factors, community partnerships, and other accomplishments. Findings provide important lessons learned, illustrate progress made by the Centers, and point to new directions for YV prevention research and programmatic efforts. PMID:26319174

  3. Encouraging responses in sexual and relationship violence prevention: what program effects remain 1 year later? (United States)

    Moynihan, Mary M; Banyard, Victoria L; Cares, Alison C; Potter, Sharyn J; Williams, Linda M; Stapleton, Jane G


    Colleges and universities are high-risk settings for sexual and relationship violence. To address these problems, institutions of higher education have implemented prevention programs, many of which train students as potential bystanders who can step in to help diffuse risky situations, identify and challenge perpetrators, and assist victims. The impact of bystander sexual and relationship violence prevention programs on long-term behavior of bystanders has remained a key unanswered question for those who seek to offer the most effective programs as well as for policy makers. In this study, the researchers experimentally evaluated the effectiveness of the Bringing in the Bystander® in-person program. Participants were 948 1st-year college students of whom 47.8% were women and 85.2% identified as White (15% also identified as Hispanic in a separate question) between the ages of 18 and 24 at two universities (one a rural, primarily residential campus and the other an urban, highly commuter campus) in the northeastern United States. To date, this is the first study to have found positive behavior changes as long-lasting as 1 year following an educational workshop focusing on engaging bystanders in preventing sexual and relationship violence. Even so, many questions remain to be answered about prevention and intervention of this type. More prospective research is needed on bystander-focused prevention of these forms of violence to help understand and better predict the complicated relationships both between and among the attitudes and behaviors related to preventing sexual and relationship violence. In this regard, we make specific recommendations for designing and evaluating programs based on our findings relating to the importance of moderators, especially two key understudied ones, readiness to help and opportunity to intervene. © The Author(s) 2014.

  4. Evaluation of a school-based violence prevention media literacy curriculum. (United States)

    Fingar, Kathryn R; Jolls, Tessa


    Evaluate whether Beyond Blame, a violence prevention media literacy curriculum, is associated with improved knowledge, beliefs and behaviours related to media use and aggression. Using a quasi-experimental design, from 2007 to 2008, teachers from schools across Southern California administered the curriculum with or without training or served as controls. Students were tested before and after the curriculum was implemented, and during the fall semester of the next academic year. Multivariate hierarchical regression was used to compare changes from baseline to follow-up between the intervention and control groups. Compared with controls, at the first post-test, students in the trained and untrained groups reported increased knowledge of five core concepts/key questions of media literacy, increased self-rated exposure to media violence, as well as stronger beliefs that media violence affects viewers and that people can protect themselves by watching less. Regarding behaviours, controls were more likely to report ≥8 h of media consumption at the second post-test than at baseline (OR=2.11; 95% CI 1.13 to 3.97), pushing or shoving another student (OR=2.16; 95% CI 1.16 to 4.02) and threatening to hit or hurt someone (OR=2.32; 95% CI 1.13 to 4.78). In comparison, there was no increase in these behaviours in the trained and untrained groups. This study suggests media literacy can be feasibly integrated into schools as an approach to improving critical analysis of media, media consumption and aggression. Changing the way youth engage media may impact many aspects of health, and an important next step will be to apply this framework to other topics. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to

  5. Is Project Towards No Drug Abuse (Project TND) an evidence-based drug and violence prevention program? A review and reappraisal of the evaluation studies. (United States)

    Gorman, Dennis M


    This paper critically reviews the published evidence pertaining to Project Towards No Drug Abuse (Project TND). Publications from seven evaluation studies of Project TND are reviewed, and the results from these are discussed as related to the following outcomes: main effects on the use of cigarettes, alcohol and marijuana; main effects on the use of "hard drugs," defined in the evaluations as cocaine, hallucinogens, stimulants, inhalants, ecstasy and other drugs (e.g., depressants, PCP, steroids and heroin); subgroup and interaction analyses of drug use; and violence-related behaviors. Very few main effects have been found for cigarette, alcohol and marijuana use in the Project TND evaluations. While studies do report main effects for hard drug use, these findings are subject to numerous threats to validity and may be attributable to the data analyses employed. Similarly, while isolated subgroup and interaction effects were found for alcohol use among baseline nonusers and some violence-related behaviors in the early Project TND evaluations, these findings have not been replicated in more recent studies and may result from multiple comparisons between study conditions. In conclusion, there is little evidence to support the assertion that Project TND is an effective drug or violence prevention program. The broader implications of these findings for prevention science are discussed and suggestions are made as to how the quality of research in the field might be improved.

  6. Predicting intentions versus predicting behaviors: domestic violence prevention from a theory of reasoned action perspective. (United States)

    Nabi, Robin L; Southwell, Brian; Hornik, Robert


    A central assumption of many models of human behavior is that intention to perform a behavior is highly predictive of actual behavior. This article presents evidence that belies this notion. Based on a survey of 1,250 Philadelphia adults, a clear and consistent pattern emerged suggesting that beliefs related to domestic violence correlate with intentions to act with respect to domestic violence but rarely correlate with reported actions (e.g., talking to the abused woman). Numerous methodological and substantive explanations for this finding are offered with emphasis placed on the complexity of the context in which an action to prevent a domestic violence incident occurs. We conclude by arguing that despite the small, insignificant relationships between beliefs and behaviors found, worthwhile aggregate effects on behavior might still exist, thus reaffirming the role of communication campaign efforts.

  7. Violence prevention in schools: Resilience promotion in the framework of a European practice research project

    Directory of Open Access Journals (Sweden)

    Katharina Rauh


    Full Text Available The following article presents the theoretical background, design and evaluation results of the international practice research project Strong implementing strategies of violence prevention in schools by means of resilience promotion. After presenting the results from the quantitative and qualitative results briefly, success factors for the implementation of a prevention strategy are highlighted. Este artigo apresenta o quadro teórico, a conceção e a avaliação dos resultados do projeto internacional Strong de investigação prática no que à implementação de estratégias de prevenção da violência nas escolas diz respeito através da promoção da resiliência. Após a apresentação breve dos resultados quantitativos e qualitativos, serão realçados os fatores de sucesso de uma estratégia de prevenção. En este artículo se presenta el marco teórico, el diseño y la evaluación de los resultados del proyecto internacional de investigación práctica Strong de la implementación de estrategias para prevenir la violencia en las escuelas mediante la promoción de la resiliencia. Después de la breve presentación de los resultados cuantitativos y cualitativos se destacarán los factores de éxito de una estrategia de prevención. Cet article présente le cadre théorique, la conception et l'évaluation des résultats du projet international de recherche pratique Strong dans la mise en œuvre de stratégies visant à prévenir la violence dans les écoles préoccupations en favorisant la résilience. Après la brève présentation des résultats quantitatifs et qualitatifs seront mis en évidence les facteurs de réussite d'une stratégie de prévention

  8. Impact of a universal school-based violence prevention program on violent delinquency: distinctive benefits for youth with maltreatment histories. (United States)

    Crooks, Claire V; Scott, Katreena; Ellis, Wendy; Wolfe, David A


    Child maltreatment constitutes a strong risk factor for violent delinquency in adolescence, with cumulative experiences of maltreatment creating increasingly greater risk. Our previous work demonstrated that a universal school-based violence prevention program could provide a protective impact for youth at risk for violent delinquency due to child maltreatment history. In this study we conducted a follow-up to determine if participation in a school-based violence prevention program in grade 9 continued to provide a buffering effect on engaging in acts of violent delinquency for maltreated youth, 2 years post-intervention. Secondary analyses were conducted using data from a cluster randomized controlled trial of a comprehensive school-based violence prevention program. Students (N=1,722; 52.8% female) from 20 schools participated in 21 75-min lessons in grade 9 health classes. Individual data (i.e., gender, child maltreatment experiences, and violent delinquency in grade 9) and school-level data (i.e., student perception of safety averaged across students in each school) were entered in a multilevel model to predict violent delinquency at the end of grade 11. Individual- and school-level factors predicting violent delinquency in grade 11 replicated previous findings from grade 9: being male, experiencing child maltreatment, being violent in grade 9, and attending a school with a lower perceived sense of safety among the entire student body increased violent delinquency. The cross-level interaction of individual maltreatment history and school-level intervention was also replicated: in non-intervention schools, youth with more maltreatment in their background were increasingly likely to engage in violent delinquency. The strength of this relationship was significantly attenuated in intervention schools. Follow-up findings are consistent with the buffering effect of the prevention program previously found post-intervention for the subsample of youth with maltreatment

  9. Numerical

    Directory of Open Access Journals (Sweden)

    M. Boumaza


    Full Text Available Transient convection heat transfer is of fundamental interest in many industrial and environmental situations, as well as in electronic devices and security of energy systems. Transient fluid flow problems are among the more difficult to analyze and yet are very often encountered in modern day technology. The main objective of this research project is to carry out a theoretical and numerical analysis of transient convective heat transfer in vertical flows, when the thermal field is due to different kinds of variation, in time and space of some boundary conditions, such as wall temperature or wall heat flux. This is achieved by the development of a mathematical model and its resolution by suitable numerical methods, as well as performing various sensitivity analyses. These objectives are achieved through a theoretical investigation of the effects of wall and fluid axial conduction, physical properties and heat capacity of the pipe wall on the transient downward mixed convection in a circular duct experiencing a sudden change in the applied heat flux on the outside surface of a central zone.

  10. Moving Forward by Looking Back: Reflecting on a Decade of CDC's Work in Sexual Violence Prevention, 2000–2010 (United States)

    Simon, Thomas R.; Basile, Kathleen C.; Yee, Sue Lin; Lang, Karen; Spivak, Howard


    Abstract In 2011, the Division of Violence Prevention (DVP) within CDC's Injury Center engaged an external panel of experts to review and evaluate its research and programmatic portfolio for sexual violence (SV) prevention from 2000 to 2010. This article summarizes findings from the review by highlighting DVP's key activities and accomplishments during this period and identifying remaining gaps in the field and future directions for SV prevention. DVP's SV prevention work in the 2000s included (1) raising the profile of SV as a public health problem, (2) shifting the field toward a focus on the primary prevention of SV perpetration, and (3) applying the public health model to SV research and programmatic activities. The panel recommended that DVP continue to draw attention to the importance of sexual violence prevention as a public health issue, build on prior investments in the Rape Prevention and Education Program, support high-quality surveillance and research activities, and enhance communication to improve the link between research and practice. Current DVP projects and priorities provide a foundation to actively address these recommendations. In addition, DVP continues to provide leadership and guidance to the research and practice fields, with the goal of achieving significant reductions in SV perpetration and allowing individuals to live to their full potential. PMID:23140201

  11. Moving forward by looking back: reflecting on a decade of CDC's work in sexual violence prevention, 2000-2010. (United States)

    DeGue, Sarah; Simon, Thomas R; Basile, Kathleen C; Yee, Sue Lin; Lang, Karen; Spivak, Howard


    In 2011, the Division of Violence Prevention (DVP) within CDC's Injury Center engaged an external panel of experts to review and evaluate its research and programmatic portfolio for sexual violence (SV) prevention from 2000 to 2010. This article summarizes findings from the review by highlighting DVP's key activities and accomplishments during this period and identifying remaining gaps in the field and future directions for SV prevention. DVP's SV prevention work in the 2000s included (1) raising the profile of SV as a public health problem, (2) shifting the field toward a focus on the primary prevention of SV perpetration, and (3) applying the public health model to SV research and programmatic activities. The panel recommended that DVP continue to draw attention to the importance of sexual violence prevention as a public health issue, build on prior investments in the Rape Prevention and Education Program, support high-quality surveillance and research activities, and enhance communication to improve the link between research and practice. Current DVP projects and priorities provide a foundation to actively address these recommendations. In addition, DVP continues to provide leadership and guidance to the research and practice fields, with the goal of achieving significant reductions in SV perpetration and allowing individuals to live to their full potential.

  12. Society of Behavioral Medicine (SBM) position statement: restore CDC funding for firearms and gun violence prevention research. (United States)

    Behrman, Pamela; Redding, Colleen A; Raja, Sheela; Newton, Tamara; Beharie, Nisha; Printz, Destiny


    The Society for Behavioral Medicine (SBM) urges restoration of Centers for Disease Control and Prevention (CDC) funding for firearms and gun violence prevention research. Gun violence in the United States is an important and costly public health issue in need of research attention. Unfortunately, there have been no concerted CDC-funded research efforts in this area since 1996, due to the passage of the Dickey Amendment. To remedy the information-gathering restrictions caused by the Dickey Amendment bans, it is recommended that Congress remove 'policy riders' on federal appropriations bills that limit firearms research at the CDC; expand NVDRS firearms-related data collection efforts to include all fifty states; fund CDC research on the risk and protective factors of gun use and gun violence prevention; fund research on evidence-based primary, secondary, and tertiary prevention and treatment initiatives for communities that are seriously impacted by the effects of gun violence; and support the development of evidence-based policy and prevention recommendations for gun use and ownership.

  13. One-year follow-up of a coach-delivered dating violence prevention program: a cluster randomized controlled trial. (United States)

    Miller, Elizabeth; Tancredi, Daniel J; McCauley, Heather L; Decker, Michele R; Virata, Maria Catrina D; Anderson, Heather A; O'Connor, Brian; Silverman, Jay G


    Perpetration of physical, sexual, and psychological abuse is prevalent in adolescent relationships. One strategy for reducing such violence is to increase the likelihood that youth will intervene when they see peers engaging in disrespectful and abusive behaviors. This 12-month follow-up of a cluster RCT examined the longer-term effectiveness of Coaching Boys Into Men, a dating violence prevention program targeting high school male athletes. This cluster RCT was conducted from 2009 to 2011. The unit of randomization was the school, and the unit of analysis was the athlete. Data were analyzed in 2012. Participants were male athletes in Grades 9-11 (N=1513) participating in athletics in 16 high schools. The intervention consisted of training athletic coaches to integrate violence prevention messages into coaching activities through brief, weekly, scripted discussions with athletes. Primary outcomes were intentions to intervene, recognition of abusive behaviors, and gender-equitable attitudes. Secondary outcomes included bystander behaviors and abuse perpetration. Intervention effects were expressed as adjusted mean between-arm differences in changes in outcomes over time, estimated via regression models for clustered, longitudinal data. Perpetration of dating violence in the past 3 months was less prevalent among intervention athletes relative to control athletes, resulting in an estimated intervention effect of -0.15 (95% CI=-0.27, -0.03). Intervention athletes also reported lower levels of negative bystander behaviors (i.e., laughing and going along with peers' abusive behaviors) compared to controls (-0.41, 95% CI=-0.72, -0.10). No differences were observed in intentions to intervene (0.04, 95% CI=-0.07, 0.16); gender-equitable attitudes (-0.04, 95% CI=-0.11, 0.04); recognition of abusive behaviors (-0.03, 95% CI=-0.15, 0.09); or positive bystander behaviors (0.04, 95% CI=-0.11, 0.19). This school athletics-based dating violence prevention program is a promising

  14. A Thematic Analysis of the Impact of MY MASCULINITY HELPS as a Tool for Sexual Violence Prevention. (United States)

    Grimmett, Marc A; Conley, Abigail H; Foster, Dominique; Clark, Cory W


    The purpose of this study is to explore the impact of an educational documentary, MY MASCULINITY HELPS ( MMH), as a sexual violence prevention tool. MMH is a short (i.e., 31 min) educational documentary that explores the role of African American men and boys in the prevention of sexual violence. Participants ( N = 88) completed an electronic, qualitative questionnaire after viewing the documentary and data collected were analyzed and interpreted using thematic analysis. Findings from the study highlighted the power of documentary film to impact knowledge, beliefs, social norms related to masculinity and the role of African American men as allies, empowerment, and commitment to action. Implications of MMH as a prosocial bystander behavior intervention and educational tool are discussed.

  15. A test of safety, violence prevention, and civility climate domain-specific relationships with relevant workplace hazards. (United States)

    Gazica, Michele W; Spector, Paul E


    Safety climate, violence prevention climate, and civility climate were independently developed and linked to domain-specific workplace hazards, although all three were designed to promote the physical and psychological safety of workers. To test domain specificity between conceptually related workplace climates and relevant workplace hazards. Data were collected from 368 persons employed in various industries and descriptive statistics were calculated for all study variables. Correlational and relative weights analyses were used to test for domain specificity. The three climate domains were similarly predictive of most workplace hazards, regardless of domain specificity. This study suggests that the three climate domains share a common higher order construct that may predict relevant workplace hazards better than any of the scales alone.

  16. 75 FR 14596 - Family Violence Prevention and Services/Grants for Domestic Violence Shelters/Grants to Native... (United States)


    ...This announcement governs the proposed award of formula grants under the Family Violence Prevention and Services Act (FVPSA) to Native American Tribes (including Alaska Native Villages) and Tribal organizations. The purpose of these grants is to assist Tribes in establishing, maintaining, and expanding programs and projects to prevent family violence and to provide immediate shelter and related assistance for victims of family violence and their dependents (42 U.S.C. 10401). This announcement sets forth the application requirements, the application process, and other administrative and fiscal requirements for grants in Fiscal Year (FY) 2010. Grantees are to be mindful that although the expenditure period for grants is a two-year period, an application is required every year to provide continuity in the provision of services. (See Section II. Award Information, Expenditure Periods.)

  17. How to engage small retail businesses in workplace violence prevention: Perspectives from small businesses and influential organizations. (United States)

    Bruening, Rebecca A; Strazza, Karen; Nocera, Maryalice; Peek-Asa, Corinne; Casteel, Carri


    Small retail businesses experience high robbery and violent crime rates leading to injury and death. Workplace violence prevention programs (WVPP) based on Crime Prevention Through Environmental Design reduce this risk, but low small business participation limits their effectiveness. Recent dissemination models of occupational safety and health information recommend collaborating with an intermediary organization to engage small businesses. Qualitative interviews with 70 small business operators and 32 representatives of organizations with small business influence were conducted to identify factors and recommendations for improving dissemination of a WVPP. Both study groups recommended promoting WVPPs through personal contacts but differed on other promotion methods and the type of influential groups to target. Small business operators indicated few connections to formal business networks. Dissemination of WVPPs to small businesses may require models inclusive of influential individuals (e.g., respected business owners) as intermediaries to reach small businesses with few formal connections. © 2015 Wiley Periodicals, Inc.

  18. Pushing the Boundaries of Education: Evaluating the "Impact of Second Step[R]--A Violence Prevention Curriculum" with Psychosocial and Non-Cognitive Measures (United States)

    Neace, William P.; Munoz, Marco A.


    The "Second Step"[R] violence prevention curriculum was implemented in a large urban school district as part of a comprehensive three-year initiative to impact students at-risk for violence and substance abuse. An outcome evaluation was conducted to assess the intervention's effectiveness on students' attitudes and on behaviors important for…

  19. Dealing with School Violence: The Effect of School Violence Prevention Training on Teachers' Perceived Self-Efficacy in Dealing with Violent Events (United States)

    Sela-Shayovitz, Revital


    This study deals with the relationship between school violence prevention training and teachers' perceived self-efficacy in handling violent events. Three indicators were used to examine teachers' self-efficacy: personal teaching efficacy (PTE), teachers' efficacy in the school as an organisation (TESO), and teachers' outcome efficacy (TOE). Data…

  20. ¿Qué sirve en la prevención de la violencia juvenil? Youth violence prevention, what works?

    Directory of Open Access Journals (Sweden)

    Rodrigo Guerrero


    Full Text Available Entre los adolescentes, que representan 20.3%, y los jóvenes, que constituyen 31.6% de la población total de las Américas, la violencia alcanza proporciones epidémicas y se convierte en un serio problema de salud pública en la región. El presente trabajo es el resultado de una revisión documental sobre las intervenciones que han demostrado éxito en la prevención de este problema entre los jóvenes. De las intervenciones efectivas destaca la concesión de tiempo específico de los adultos para interactuar con niños y adolescentes, así como la aplicación de programas enfocados en el desarrollo infantil temprano y las prácticas educativas adecuadas entre los padres. Esta última es una de las intervenciones de mayor beneficio en términos del costo para la reducción de los comportamientos de riesgo entre los jóvenes. Los esfuerzos para desarmar a la población civil en periodos y espacios críticos sobresale también por su eficacia.Violence is currently considered to be both an epidemic problem and a public health problem among youth and adolescents, who represent 31.6% and 20.3% of the overall population of the Americas region, respectively. This paper analyzes the scientific literature on violence prevention as it relates to successful interventions among these populations. Some of the most successful interventions are those related to active engagement of adults with children and adolescents and programs oriented toward early child development and adequate educational practices among parents. The latter is one of the most cost-effective violence prevention interventions for children and adolescents. Efforts to disarm civilian populations during critical periods have also been shown to be effective.

  1. A detailed survey of numerical methods for unconstrained minimization. Pt. 1

    International Nuclear Information System (INIS)

    Mika, K.; Chaves, T.


    A detailed description of numerical methods for unconstrained minimization is presented. This first part surveys in particular conjugate direction and gradient methods, whereas variable metric methods will be the subject of the second part. Among the results of special interest we quote the following. The conjugate direction methods of Powell, Zangwill and Sutti can be best interpreted if the Smith approach is adopted. The conditions for quadratic termination of Powell's first procedure are analyzed. Numerical results based on nonlinear least squares problems are presented for the following conjugate direction codes: VA04AD from Harwell Subroutine Library and ZXPOW from IMSL, both implementations of Powell's second procedure, DFMND from IBM-SILMATH (Zangwill's method) and Brent's algorithm PRAXIS. VA04AD turns out to be superior in all cases, PRAXIS improves for high-dimensional problems. All codes clearly exhibit superlinear convergence. Akaike's result for the method of steepest descent is derived directly from a set of nonlinear recurrence relations. Numerical results obtained with the highly ill conditioned Hilbert function confirm the theoretical predictions. Several properties of the conjugate gradient method are presented and a new derivation of the equivalence of steepest descent partan and the CG method is given. A comparison of numerical results from the CG codes VA08AD (Fletcher-Reeves), DFMCG (the SSP version of the Fletcher-Reevens algorithm) and VA14AD (Powell's implementation of the Polak-Ribiere formula) reveals that VA14AD is clearly superior in all cases, but that the convergence rate of these codes is only weakly superlinear such that high accuracy solutions require extremely large numbers of function calls. (orig.)

  2. Revealing a Hidden Curriculum of Black Women's Erasure in Sexual Violence Prevention Policy (United States)

    Wooten, Sara Carrigan


    This article aims to challenge the framework by which rape and sexual assault prevention in higher education are being constituted by centring Black women's experiences of sexual violence within a prevention and response policy framework. Numerous research studies exist in the literature regarding the specific experience of sexual violence for…

  3. Using multi-disciplinary optimization and numerical simulation on the transiting exoplanet survey satellite (United States)

    Stoeckel, Gerhard P.; Doyle, Keith B.


    The Transiting Exoplanet Survey Satellite (TESS) is an instrument consisting of four, wide fieldof- view CCD cameras dedicated to the discovery of exoplanets around the brightest stars, and understanding the diversity of planets and planetary systems in our galaxy. Each camera utilizes a seven-element lens assembly with low-power and low-noise CCD electronics. Advanced multivariable optimization and numerical simulation capabilities accommodating arbitrarily complex objective functions have been added to the internally developed Lincoln Laboratory Integrated Modeling and Analysis Software (LLIMAS) and used to assess system performance. Various optical phenomena are accounted for in these analyses including full dn/dT spatial distributions in lenses and charge diffusion in the CCD electronics. These capabilities are utilized to design CCD shims for thermal vacuum chamber testing and flight, and verify comparable performance in both environments across a range of wavelengths, field points and temperature distributions. Additionally, optimizations and simulations are used for model correlation and robustness optimizations.

  4. Gender roles, physical and sexual violence prevention in primary extend to secondary school in Samutsakorn Province, Thailand. (United States)

    Chamroonsawasdi, Kanittha; Suparp, Jarueyporn; Kittipichai, Wirin; Khajornchaikul, Piyathida


    To enhance positive attitude and life skills on gender roles to prevent physical and sexual violence. A whole school-based participatory learning program using a quasi-experimental study with pre and post test design was conducted among 2 schools during June-September, 2005. The experimental group, were 134 students in a primary school and 179 students in a secondary school. While the control group, were 122 students in a primary school and 95 students in a secondary school. Means score of attitude toward gender roles before implementation in the experimental group was significantly lower than the control group (p 0.05). Means paired different score (after-before) between the two groups was significantly different (p = 0.002). A whole school-based program on gender roles and violence prevention is suitable for youths and should be merged as school curricula and expanded as a nationwide program at all level of education. Gender equity should be taught at an early childhood. Parental involvement in school-based activities should be negotiated.

  5. Evaluation of the expect respect support group program: A violence prevention strategy for youth exposed to violence. (United States)

    Reidy, Dennis E; Holland, Kristin M; Cortina, Kai; Ball, Barbara; Rosenbluth, Barri


    In the present study, we assess the effects of the Expect Respect Support Groups (ERSG) on frequency of teen dating violence (TDV) and general youth violence. ERSG is a school-based violence prevention program for youth who have been exposed to violence in their home, school, or community. Boys and girls (N=1,678, M age =14.3, S.D.=1.7, Range=11-17) from 36 schools in Texas participated in this accelerated longitudinal (7-year trajectory) study beginning in 2011. Latent growth curve analyses were conducted using three waves of data from three cross-sectional cohorts of adolescents. Among boys, the number of ERSG sessions attended related to incremental declines in psychological TDV perpetration and victimization, physical TDV victimization, sexual TDV perpetration and victimization, reactive aggression, and proactive aggression. Girls attending ERSG demonstrated reductions in reactive and proactive aggression. The present findings suggest ERSG may be an effective cross-cutting strategy to reduce TDV and other forms of violence among high-risk boys and possibly girls. This information provides valuable understanding of TDV and youth violence in high-risk populations and may be useful in tailoring future prevention efforts to different groups of teens. Copyright © 2017 The Authors. Published by Elsevier Inc. All rights reserved.

  6. The Irie Classroom Toolbox: developing a violence prevention, preschool teacher training program using evidence, theory, and practice. (United States)

    Baker-Henningham, Helen


    In this paper, I describe the development of the Irie Classroom Toolbox, a school-based violence prevention, teacher training program for use with children aged 3-6 years. In-depth interviews were conducted with Jamaican preschool teachers, who had participated in a trial of a classroom behavior management program, at posttest (n = 35) and 5 years later (n = 20). An on-going process evaluation was also conducted. Teachers' preferred behavior management strategies and training methods were documented, and enablers and barriers to implementation were identified. Teachers were most likely to adopt strategies that they liked, found easy to use, and were effective. These included paying attention to positive behavior and explicitly teaching children the expected behavior. Teachers preferred active, hands-on training strategies based on social-cognitive theories. Enablers to intervention implementation included positive teacher-facilitator relationships, choice, collaborative problem solving, teachers recognizing benefits of the intervention, group support, and provision of materials. Barriers to intervention implementation were also identified. These data were integrated with behavior change theory (i.e., the behavior change wheel and theoretical domains framework) to develop an intervention grounded in common core elements of evidence-based programs while also utilizing teachers' perspectives. The resulting program is a low cost, adaptable intervention that should be suitable for training preschool teachers in other low-resource settings. © 2018 The Authors. Annals of the New York Academy of Sciences published by Wiley Periodicals, Inc. on behalf of The New York Academy of Sciences.

  7. Global development and diffusion of outcome evaluation research for interpersonal and self-directed violence prevention from 2007 to 2013: A systematic review (United States)

    Hughes, Karen; Bellis, Mark A.; Hardcastle, Katherine A.; Butchart, Alexander; Dahlberg, Linda L.; Mercy, James A.; Mikton, Christopher


    Through a global review, we identified gaps in the geographical distribution of violence prevention evidence outcome evaluation studies and the types of violence addressed. Systematic literature searches identified 355 articles published between 2007 and 2013 that evaluated programs to prevent interpersonal or self-directed violence; focused on universal or selected populations; and reported outcomes measuring violence or closely related risk factors. The number of studies identified increased annually from 2008 (n = 37), reaching 64 in 2013. Over half (n = 203) of all studies focused on youth violence yet only one on elder maltreatment. Study characteristics varied by year and violence type. Only 9.3% of all studies had been conducted in LMICs. These studies were less likely than those in high income countries (HICs) to have tested established interventions yet more likely to involve international collaboration. Evaluation studies successfully established in LMIC had often capitalized on other major regional priorities (e.g. HIV). Relationships between violence and social determinants, communicable and non-communicable diseases, and even economic prosperity should be explored as mechanisms to increase the global reach of violence prevention research. Results should inform future research strategies and provide a baseline for measuring progress in developing the violence prevention evidence-base, especially in LMICs. PMID:29725241

  8. Global development and diffusion of outcome evaluation research for interpersonal and self-directed violence prevention from 2007 to 2013: A systematic review. (United States)

    Hughes, Karen; Bellis, Mark A; Hardcastle, Katherine A; Butchart, Alexander; Dahlberg, Linda L; Mercy, James A; Mikton, Christopher


    Through a global review, we identified gaps in the geographical distribution of violence prevention evidence outcome evaluation studies and the types of violence addressed. Systematic literature searches identified 355 articles published between 2007 and 2013 that evaluated programs to prevent interpersonal or self-directed violence; focused on universal or selected populations; and reported outcomes measuring violence or closely related risk factors. The number of studies identified increased annually from 2008 (n = 37), reaching 64 in 2013. Over half (n = 203) of all studies focused on youth violence yet only one on elder maltreatment. Study characteristics varied by year and violence type. Only 9.3% of all studies had been conducted in LMICs. These studies were less likely than those in high income countries (HICs) to have tested established interventions yet more likely to involve international collaboration. Evaluation studies successfully established in LMIC had often capitalized on other major regional priorities (e.g. HIV). Relationships between violence and social determinants, communicable and non-communicable diseases, and even economic prosperity should be explored as mechanisms to increase the global reach of violence prevention research. Results should inform future research strategies and provide a baseline for measuring progress in developing the violence prevention evidence-base, especially in LMICs.

  9. Shifting Boundaries: an experimental evaluation of a dating violence prevention program in middle schools. (United States)

    Taylor, Bruce G; Stein, Nan D; Mumford, Elizabeth A; Woods, Daniel


    We randomly assigned the Shifting Boundaries interventions to 30 public middle schools in New York City, enrolling 117 sixth and seventh grade classes (over 2,500 students) to receive a classroom, a building, a combined, or neither intervention. The classroom intervention included a six-session curriculum emphasizing the laws and consequences for perpetrators of dating violence and sexual harassment (DV/H), the social construction of gender roles, and healthy relationships. The building-based intervention included the use of building-based restraining orders, higher levels of faculty/security presence in safe/unsafe "hot spots" mapped by students, and posters to increase DV/H awareness and reporting. Student surveys were implemented at baseline, immediately after the intervention, and 6-months post-intervention. As hypothesized, behaviors improved as a result of the interventions. The building-only and the combined interventions were effective in reducing sexual violence victimization involving either peers or dating partners at 6-months post-intervention. This was mirrored by reductions in sexual violence perpetration by peers in the building-only intervention. While the preponderance of results indicates that the interventions were effective, an anomalous result (increase in sexual harassment victimization reports that was contradicted by lower frequency estimates) did emerge. However, after analysis these anomalous results were deemed to be most likely spurious. The success of the building-only intervention alone is important because it can be implemented with very few extra costs to schools.

  10. Effectiveness of "shifting boundaries" teen dating violence prevention program for subgroups of middle school students. (United States)

    Taylor, Bruce G; Mumford, Elizabeth A; Stein, Nan D


    We examine whether the Shifting Boundaries (SB) intervention, a primary intervention to prevent youth dating violence and sexual harassment (DV/H), is differentially effective for girls compared with boys or for youth with a history of DV/H experiences. We randomly assigned SB to 30 public middle schools in New York City, enrolling 117 sixth and seventh grade classes to receive a classroom, building, combined, or neither intervention. The SB classroom intervention included six sessions emphasizing the laws/consequences of DV/H, establishing boundaries and safe relationships. The SB schoolwide/building intervention included the use of school-based restraining orders, greater faculty/security presence in unsafe "hot spots" mapped by students, and posters to increase DV/H awareness and reporting. Student surveys were implemented at baseline, immediately after intervention, and 6 months after intervention. At 6 months after intervention, the SB building-level intervention was associated with significant reductions in the frequency of sexual harassment (SH) perpetration and victimization; the prevalence and frequency of sexual dating violence victimization; and the frequency of total dating violence victimization and perpetration. We also had one anomalous finding that the interventions were associated with an increase in the prevalence of SH victimization. These results were consistent for girls and boys, and those with or without a history of DV/H, with the one exception for those exposed to the SB building condition who had earlier reported perpetrating SH had a significantly lower frequency of perpetrating SH at the follow-up than those without such a history. SB can provide effective universal prevention of middle school DV/H experiences, regardless of students' prior exposure histories, and for boys and girls. Copyright © 2015 Society for Adolescent Health and Medicine. Published by Elsevier Inc. All rights reserved.

  11. Applying systems theory to the evaluation of a whole school approach to violence prevention. (United States)

    Kearney, Sarah; Leung, Loksee; Joyce, Andrew; Ollis, Debbie; Green, Celia


    Issue addressed Our Watch led a complex 12-month evaluation of a whole school approach to Respectful Relationships Education (RRE) implemented in 19 schools. RRE is an emerging field aimed at preventing gender-based violence. This paper will illustrate how from an implementation science perspective, the evaluation was a critical element in the change process at both a school and policy level. Methods Using several conceptual approaches from systems science, the evaluation sought to examine how the multiple systems layers - student, teacher, school, community and government - interacted and influenced each other. A distinguishing feature of the evaluation included 'feedback loops'; that is, evaluation data was provided to participants as it became available. Evaluation tools included a combination of standardised surveys (with pre- and post-intervention data provided to schools via individualised reports), reflection tools, regular reflection interviews and summative focus groups. Results Data was shared during implementation with project staff, department staff and schools to support continuous improvement at these multiple systems levels. In complex settings, implementation can vary according to context; and the impact of evaluation processes, tools and findings differed across the schools. Interviews and focus groups conducted at the end of the project illustrated which of these methods were instrumental in motivating change and engaging stakeholders at both a school and departmental level and why. Conclusion The evaluation methods were a critical component of the pilot's approach, helping to shape implementation through data feedback loops and reflective practice for ongoing, responsive and continuous improvement. Future health promotion research on complex interventions needs to examine how the evaluation itself is influencing implementation. So what? The pilot has demonstrated that the evaluation, including feedback loops to inform project activity, were an

  12. A systematic meta-review of evaluations of youth violence prevention programs: Common and divergent findings from 25 years of meta-analyses and systematic reviews☆ (United States)

    Matjasko, Jennifer L.; Vivolo-Kantor, Alana M.; Massetti, Greta M.; Holland, Kristin M.; Holt, Melissa K.; Cruz, Jason Dela


    Violence among youth is a pervasive public health problem. In order to make progress in reducing the burden of injury and mortality that result from youth violence, it is imperative to identify evidence-based programs and strategies that have a significant impact on violence. There have been many rigorous evaluations of youth violence prevention programs. However, the literature is large, and it is difficult to draw conclusions about what works across evaluations from different disciplines, contexts, and types of programs. The current study reviews the meta-analyses and systematic reviews published prior to 2009 that synthesize evaluations of youth violence prevention programs. This meta-review reports the findings from 37 meta-analyses and 15 systematic reviews; the included reviews were coded on measures of the social ecology, prevention approach, program type, and study design. A majority of the meta-analyses and systematic reviews were found to demonstrate moderate program effects. Meta-analyses yielded marginally smaller effect sizes compared to systematic reviews, and those that included programs targeting family factors showed marginally larger effects than those that did not. In addition, there are a wide range of individual/family, program, and study moderators of program effect sizes. Implications of these findings and suggestions for future research are discussed. PMID:29503594

  13. Risk and direct protective factors for youth violence: results from the Centers for Disease Control and Prevention's Multisite Violence Prevention Project. (United States)

    Henry, David B; Tolan, Patrick H; Gorman-Smith, Deborah; Schoeny, Michael E


    This study was conducted as part of a multisite effort to examine risk and direct protective factors for youth violence. The goal was to identify those factors in the lives of young people that increase or decrease the risk of violence. These analyses fill an important gap in the literature, as few studies have examined risk and direct protective factors for youth violence across multiple studies. Data on 4432 middle-school youth, from the CDC Multisite Violence Prevention Project were used. Evaluations were made of effects of variables coded as risk and direct protective factors in the fall of 6th grade on violence measured in spring of 7th and 8th grades. Factors tested included depression, delinquency, alcohol and drug involvement, involvement in family activities, academic achievement, attitudes toward school, truancy, and peer deviance. Most variables were coded with two sets of dummy variables indicating risk and protective directions of effects. Results showed that higher teacher-rated study skills were associated with lower subsequent violence across genders and ethnic groups. Affiliation with deviant peers was significantly associated with increased subsequent violence among youth reporting their race/ethnicity as white or other, marginally associated with increased violence among African-American youth, and unrelated among Latino youth. This study identified some factors than should be areas of interest for effective prevention programs. Some ethnic differences also should be considered in planning of prevention. The CDC Multisite Violence Prevention Project completed enrollment prior to July 2005. Copyright © 2012. Published by Elsevier Inc.

  14. Basic Numerical Capacities and Prevalence of Developmental Dyscalculia: The Havana Survey (United States)

    Reigosa-Crespo, Vivian; Valdes-Sosa, Mitchell; Butterworth, Brian; Estevez, Nancy; Rodriguez, Marisol; Santos, Elsa; Torres, Paul; Suarez, Ramon; Lage, Agustin


    The association of enumeration and number comparison capacities with arithmetical competence was examined in a large sample of children from 2nd to 9th grades. It was found that efficiency on numerical capacities predicted separately more than 25% of the variance in the individual differences on a timed arithmetical test, and this occurred for…

  15. Numerical Survey of Contaminant Transport and Self-Cleansing of Water in Nador Lagoon, Morocco

    Directory of Open Access Journals (Sweden)

    E. M. Chaabelasri


    Full Text Available Numerical simulations are presented of the flow hydrodynamics and hypothetical contaminant dispersion patterns in Nador Lagoon, a shallow lagoon with a barrier island situated on the coast of Morocco. It is found that the natural circulation forced by the tidal flow in the lagoon is greatly affected by the development of an artificial inlet in the barrier island. The case study demonstrates the potential use of modern computational hydraulics as a tool integrated in the decision support system designed to manage a lagoon ecosystem.

  16. Research priority setting for integrated early child development and violence prevention (ECD+) in low and middle income countries: An expert opinion exercise. (United States)

    Tomlinson, Mark; Jordans, Mark; MacMillan, Harriet; Betancourt, Theresa; Hunt, Xanthe; Mikton, Christopher


    Child development in low and middle income countries (LMIC) is compromised by multiple risk factors. Reducing children's exposure to harmful events is essential for early childhood development (ECD). In particular, preventing violence against children - a highly prevalent risk factor that negatively affects optimal child development - should be an intervention priority. We used the Child Health and Nutrition Initiative (CHNRI) method for the setting of research priorities in integrated Early Childhood Development and violence prevention programs (ECD+). An expert group was identified and invited to systematically list and score research questions. A total of 186 stakeholders were asked to contribute five research questions each, and contributions were received from 81 respondents. These were subsequently evaluated using a set of five criteria: answerability; effectiveness; feasibility and/or affordability; applicability and impact; and equity. Of the 400 questions generated, a composite group of 50 were scored by 55 respondents. The highest scoring research questions related to the training of Community Health Workers (CHW's) to deliver ECD+ interventions effectively and whether ECD+ interventions could be integrated within existing delivery platforms such as HIV, nutrition or mental health platforms. The priority research questions can direct new research initiatives, mainly in focusing on the effectiveness of an ECD+ approach, as well as on service delivery questions. To the best of our knowledge, this is the first systematic exercise of its kind in the field of ECD+. The findings from this research priority setting exercise can help guide donors and other development actors towards funding priorities for important future research related to ECD and violence prevention. Copyright © 2017 The Authors. Published by Elsevier Ltd.. All rights reserved.

  17. Survey of a numerical procedure for the solution of hyperbolic systems of three dimensional fluid flow

    International Nuclear Information System (INIS)

    Graf, U.


    A combination of several numerical methods is used to construct a procedure for effective calculation of complex three-dimensional fluid flow problems. The split coefficient matrix (SCM) method is used so that the differenced equations of the hyperbolic system do not disturb correct signal propagation. The semi-discretisation of the equations of the SCM method is done with the asymmetric, separated region, weighted residual (ASWR) method to give accurate solutions on a relatively coarse mesh. For the resulting system of ordinary differential equations, a general-purpose ordinary differential equation solver is used in conjunction with a method of fractional steps for an economic solution of the large system of linear equations. (orig.) [de

  18. Literature survey, numerical examples, and recommended design studies for main-coolant pumps. Final report

    International Nuclear Information System (INIS)

    Allaire, P.E.; Barrett, L.E.


    This report presents an up-to-date literature survey, examples of calculations of seal forces or other pump properties, and recommendations for future work pertaining to primary coolant pumps and primary recirculating pumps in the nuclear power industry. Five main areas are covered: pump impeller forces, fluid annuli, bearings, seals, and rotor calculations. The main conclusion is that forces in pump impellers is perhaps the least well understood area, seals have had some good design work done on them recently, fluid annuli effects are being discussed in the literature, bearing designs are fairly well known, and rotor calculations have been discussed widely in the literature. It should be noted, however, that usually the literature in a given area is not applied to pumps in nuclear power stations. The most immediate need for a combined theoretical and experimental design capability exists in mechanical face seals

  19. Numerical survey of pressure wave propagation around and inside an underground cavity with high order FEM (United States)

    Esterhazy, Sofi; Schneider, Felix; Schöberl, Joachim; Perugia, Ilaria; Bokelmann, Götz


    The research on purely numerical methods for modeling seismic waves has been more and more intensified over last decades. This development is mainly driven by the fact that on the one hand for subsurface models of interest in exploration and global seismology exact analytic solutions do not exist, but, on the other hand, retrieving full seismic waveforms is important to get insides into spectral characteristics and for the interpretation of seismic phases and amplitudes. Furthermore, the computational potential has dramatically increased in the recent past such that it became worthwhile to perform computations for large-scale problems as those arising in the field of computational seismology. Algorithms based on the Finite Element Method (FEM) are becoming increasingly popular for the propagation of acoustic and elastic waves in geophysical models as they provide more geometrical flexibility in terms of complexity as well as heterogeneity of the materials. In particular, we want to demonstrate the benefit of high-order FEMs as they also provide a better control on the accuracy. Our computations are done with the parallel Finite Element Library NGSOLVE ontop of the automatic 2D/3D mesh generator NETGEN ( Further we are interested in the generation of synthetic seismograms including direct, refracted and converted waves in correlation to the presence of an underground cavity and the detailed simulation of the comprehensive wave field inside and around such a cavity that would have been created by a nuclear explosion. The motivation of this application comes from the need to find evidence of a nuclear test as they are forbidden by the Comprehensive Nuclear-Test Ban Treaty (CTBT). With this approach it is possible for us to investigate the wave field over a large bandwidth of wave numbers. This again will help to provide a better understanding on the characteristic signatures of an underground cavity, improve the protocols for

  20. Effectiveness of a Mentor-Implemented Violence Prevention Intervention for Assault-Injured Youth Presenting to the Emergency Department: Results of a Randomized Trial (United States)

    Cheng, Tina L.; Haynie, Denise; Brenner, Ruth; Wright, Joseph L.; Chung, Shang-en; Simons-Morton, Bruce


    Context The emergency department has been described as a promising setting to initiate interventions with assault-injured youth to reduce the risk of re-injury and reactive perpetration. Efforts to intervene have received little study. Objective To assess the impact of a mentor-implemented violence prevention intervention on reducing aggression, fighting and re-injury among assault-injured youth. Design Randomized controlled trial Setting Two large urban hospital emergency departments Participants Youth age 10–15 presenting with peer assault injury were recruited and randomly assigned to intervention and comparison groups. Intervention Intervention youth received a mentor who implemented a 6 session problem-solving curriculum while parents received 3 home visits with a health educator to discuss family needs and facilitate service use and parental monitoring. The comparison group received a list of community resources with 2 follow-up phone calls to facilitate service use. Main Outcome Measures Youth and parents were interviewed at baseline and 6 months to assess attitudes about violence, risk factors, fighting and repeat injury. Results 227 families were recruited with 23% refusing participation and 4% partial interview completion. 166 families were enrolled with 87 randomized to the intervention group and 79 in the comparison group; 118 (71%) completed both youth and parent follow-up interviews and 113 had usable data. Intervention and comparison groups were not significantly different at baseline on demographics or risk factors except for increased knife carrying and less deviant peers in the intervention group. After adjustment for baseline differences, there was a trend toward significant program effect including reducing misdemeanor activity (rate ratio 0.29, confidence interval 0.08–0.98), youth-reported aggression scores (rate ratio .63, 0.4–1.00) and increasing youth self efficacy (beta=2.28, pmentor-implemented program with assault-injured youth

  1. Constructing "Packages" of Evidence-Based Programs to Prevent Youth Violence: Processes and Illustrative Examples From the CDC's Youth Violence Prevention Centers. (United States)

    Kingston, Beverly; Bacallao, Martica; Smokowski, Paul; Sullivan, Terri; Sutherland, Kevin


    This paper describes the strategic efforts of six National Centers of Excellence in Youth Violence Prevention (YVPC), funded by the U.S. Centers for Disease Control and Prevention, to work in partnership with local communities to create comprehensive evidence-based program packages to prevent youth violence. Key components of a comprehensive evidence-based approach are defined and examples are provided from a variety of community settings (rural and urban) across the nation that illustrate attempts to respond to the unique needs of the communities while maintaining a focus on evidence-based programming and practices. At each YVPC site, the process of selecting prevention and intervention programs addressed the following factors: (1) community capacity, (2) researcher and community roles in selecting programs, (3) use of data in decision-making related to program selection, and (4) reach, resources, and dosage. We describe systemic barriers to these efforts, lessons learned, and opportunities for policy and practice. Although adopting an evidence-based comprehensive approach requires significant upfront resources and investment, it offers great potential for preventing youth violence and promoting the successful development of children, families and communities.

  2. Teen Dating Violence Prevention: Cluster-Randomized Trial of Teen Choices, an Online, Stage-Based Program for Healthy, Nonviolent Relationships. (United States)

    Levesque, Deborah A; Johnson, Janet L; Welch, Carol A; Prochaska, Janice M; Paiva, Andrea L


    Teen dating violence is a serious public health problem. A cluster-randomized trial was conducted to assess the efficacy of Teen Choices , a 3-session online program that delivers assessments and individualized guidance matched to dating history, dating violence experiences, and stage of readiness for using healthy relationship skills. For high risk victims of dating violence, the program addresses readiness to keep oneself safe in relationships. Twenty high schools were randomly assigned to the Teen Choices condition ( n =2,000) or a Comparison condition ( n =1,901). Emotional and physical dating violence victimization and perpetration were assessed at 6 and 12 months in the subset of participants (total n =2,605) who reported a past-year history of dating violence at baseline, and/or who dated during the study. The Teen Choices program was associated with significantly reduced odds of all four types of dating violence (adjusted ORs ranging from .45 to .63 at 12 months follow-up). For three of the four violence outcomes, participants with a past-year history of that type of violence benefited significantly more from the intervention than students without a past-year history. The Teen Choices program provides an effective and practicable strategy for intervention for teen dating violence prevention.

  3. Co-ownership and Collaboration: Insights into the Measurement of Impact and Change from Evidence-Based Community and State Violence Prevention Partnerships

    Directory of Open Access Journals (Sweden)

    Tariro Mutongwizo


    Full Text Available Effective partnerships in community crime and violence prevention interventions are challenging to foster. While this may be the case, their merits cannot be denied, thus it is necessary to involve diverse stakeholders in processes that aim to address violence and crime prevention in order to better approach the causes of crime. However practical experiences have identified the challenges of crime prevention partnerships, particularly in developing indicators that appropriately measure and work to monitor and evaluate progress. It has also been noted that it is difficult to discern which interventions yield success, particularly in partnerships with various stakeholders. This article therefore encourages joint assessments from the onset of crime prevention projects with the development of indicators that are relatable to all partners. The paper will draw on three violence and crime prevention pilot projects, conducted in South Africa. The discussion will focus on the processes of developing performance measurement frameworks and the challenges and successes experienced throughout the monitoring, evaluation and learning process.

  4. The Economic Burden of Intimate Partner Violence in Ecuador: Setting the Agenda for Future Research and Violence Prevention Policies

    Directory of Open Access Journals (Sweden)

    Phaedra Corso


    Full Text Available Introduction: Intimate partner violence (IPV is a widespread social structural problem that affects a great proportion of Ecuadorian women. IPV is a sexually, psychologically, or physically coercive act against an adult or adolescent woman by a current or former intimate partner. Not-for-profit groups in Ecuador report that 70% of women experience 1 of the forms of IPV sometime during their lifetime, but population-based surveys suggest that 41% of Ecuadorian women are exposed to emotional violence, 31% physical violence, and 12% sexual violence by their spouse or partner over their lifetime. Despite the high prevalence, the response of the Ecuadorian government has been insufficient to reduce the number of victims and to provide adequate legal and health services for the prevention and treatment of IPV. Given the power of economic data to influence policy making, the goal of this study is to produce the first estimate of the economic impact of IPV in Ecuador and to identify the policy paths in which these estimates would have the greatest impact for Ecuador.Methods: Using a bottom-up method for estimating the economic burden of IPV and a national prevalence of IPV based on a population-based survey in the 2003–2004 year, the total economic burden is estimated at approximately $109 million adjusted to the 2012 United States (U.S. currency rate. Results: Based on a prevalence of 255,267 women who were victims of IPV in the 2003–2004 year, the total economic burden is estimated at approximately $109 million adjusted to the 2012 the U.S. currency rate. The largest cost category contributing to the economic burden was the costs of healthcare services to treat injuries associated with IPV events.Conclusion: The asymmetry between the economic burden of IPV and the amount of government resources devoted to IPV prevention efforts suggests the need for a greater role to be played by the government and other factors in society in the area of IPV

  5. Implementation of the Good School Toolkit in Uganda: a quantitative process evaluation of a successful violence prevention program. (United States)

    Knight, Louise; Allen, Elizabeth; Mirembe, Angel; Nakuti, Janet; Namy, Sophie; Child, Jennifer C; Sturgess, Joanna; Kyegombe, Nambusi; Walakira, Eddy J; Elbourne, Diana; Naker, Dipak; Devries, Karen M


    The Good School Toolkit, a complex behavioural intervention designed by Raising Voices a Ugandan NGO, reduced past week physical violence from school staff to primary students by an average of 42% in a recent randomised controlled trial. This process evaluation quantitatively examines what was implemented across the twenty-one intervention schools, variations in school prevalence of violence after the intervention, factors that influence exposure to the intervention and factors associated with students' experience of physical violence from staff at study endline. Implementation measures were captured prospectively in the twenty-one intervention schools over four school terms from 2012 to 2014 and Toolkit exposure captured in the student (n = 1921) and staff (n = 286) endline cross-sectional surveys in 2014. Implementation measures and the prevalence of violence are summarised across schools and are assessed for correlation using Spearman's Rank Correlation Coefficient. Regression models are used to explore individual factors associated with Toolkit exposure and with physical violence at endline. School prevalence of past week physical violence from staff against students ranged from 7% to 65% across schools at endline. Schools with higher mean levels of teacher Toolkit exposure had larger decreases in violence during the study. Students in schools categorised as implementing a 'low' number of program school-led activities reported less exposure to the Toolkit. Higher student Toolkit exposure was associated with decreased odds of experiencing physical violence from staff (OR: 0.76, 95%CI: 0.67-0.86, p-valueEffectiveness of the Toolkit may be increased by further targeting and supporting teachers' engagement with girls and students with mental health difficulties. The trial is registered at , NCT01678846, August 24th 2012.

  6. Effectiveness of a mentor-implemented, violence prevention intervention for assault-injured youths presenting to the emergency department: results of a randomized trial. (United States)

    Cheng, Tina L; Haynie, Denise; Brenner, Ruth; Wright, Joseph L; Chung, Shang-en; Simons-Morton, Bruce


    The goal was to assess the impact of a mentor-implemented, violence prevention intervention in reducing aggression, fighting, and reinjury among assault-injured youths. In a randomized, controlled trial performed in the emergency departments of 2 large urban hospitals, 10- to 15-year-old youths who presented with peer assault injuries were recruited and randomly assigned to intervention and comparison groups. In the intervention group, youths received a mentor, who implemented a 6-session problem-solving curriculum, and parents received 3 home visits with a health educator, to discuss family needs and to facilitate service use and parental monitoring. The comparison group received a list of community resources, with 2 follow-up telephone calls to facilitate service use. Youths and parents were interviewed at baseline and at 6 months, for assessment of attitudes about violence, risk factors, fighting, and repeat injury. A total of 227 families were recruited, with 23% refusing participation and 4% providing partial interview completion. A total of 166 families were enrolled, with 87 assigned to the intervention group and 79 to the comparison group; 118 (71%) completed both youth and parent follow-up interviews, and 113 had usable data. The intervention and comparison groups were not significantly different at baseline with respect to demographic features or risk factors, except for increased knife-carrying and fewer deviant peers in the intervention group. After adjustment for baseline differences, there was a trend toward significant program effects, including reduced misdemeanor activity and youth-reported aggression scores and increased youth self-efficacy. Program impact was associated with the number of intervention sessions received. A community-based, mentor-implemented program with assault-injured youths who presented to the emergency department trended in the direction of decreased violence, with reduced misdemeanors and increased self-efficacy.

  7. Youth-violence prevention in the aftermath of the San Diego East county school shootings: a qualitative assessment of community explanatory models. (United States)

    Palinkas, Lawrence A; Prussing, Erica; Landsverk, John; Reznik, Vivian


    In March, 2001, 2 separate incidents of school shootings occurred within the same school district in San Diego's East County. To examine community explanatory models of the causes of the school shootings and strategies for preventing such events. A qualitative study was undertaken in 4 East County communities over a 6-month period following the 2 events. Semistructured interviews were conducted with 85 community residents identified through maximum variation sampling. Interview transcripts were analyzed by coding consensus, co-occurrence and comparison, using NVivo text analysis software. Four sets of theories as to the cause of these events were identified, based on the following: 1) unique or idiosyncratic characteristics of the 2 shooters (newcomer to community who was a victim of bullying, victim of child abuse with a history of mental illness), 2) universal factors (culture of violence, violence in the media), 3) family-centered characteristics (single-parent households, dysfunctional relationships), and 4) community-specific characteristics (reputation for social intolerance, widespread access to guns). Beliefs in family-centered and community-centered theories of etiology were associated with optimism in preventing such events from occurring in the future through increased recognition and response to problem behaviors, while beliefs in idiosyncratic or universal determinants of youth violence were associated with pessimistic assessments of prevention. In this community, youth-violence-prevention programs that focus on taking responsibility for recognizing and responding to problem behaviors in at-risk youth are more likely to gain community support and participation than programs that focus on increased security, surveillance, or behavior change.

  8. Differential Impacts of an Intimate Partner Violence Prevention Program Based on Child Marriage Status in Rural Côte d'Ivoire. (United States)

    Falb, Kathryn L; Annan, Jeannie; Kpebo, Denise; Cole, Heather; Willie, Tiara; Xuan, Ziming; Raj, Anita; Gupta, Jhumka


    Little is known about whether effectiveness of intimate partner violence prevention programming varies for women who were married as child brides, given their additional social vulnerabilities. This subanalysis sought to assess treatment heterogeneity based on child marriage status for an intervention seeking to reduce intimate partner violence. A randomized controlled trial assessing the incremental effectiveness of gender dialogue groups in addition to group savings on changing past-year intimate partner violence was conducted in Côte d'Ivoire (2010-2012). Stratified models were constructed based on child marriage status to assess for effect modification. Analysis was restricted to married women with data on age at marriage (n = 682). For child brides (N = 202), there were no statistically or marginally significant decreases in physical and/or sexual violence, physical violence, or sexual violence. The odds of reporting economic abuse in the past year were lower in the intervention arm for child brides relative to control group child brides (odds ratio [OR] = .33; 95% confidence interval [CI] = .13-.85; p = .02). For nonchild brides (N = 480), women were less likely to report physical and/or sexual violence (OR = .54; 95% CI = .28-1.04; p = .06), emotional violence (OR = .44; 95% CI = .25-.77; p = .004), and economic abuse (OR = .36; 95% CI = .20-.66; p = .001) in the combined intervention arm than their group savings-only counterparts. Findings suggest that intervention participants with a history of child marriage may have greater difficulty benefiting from interventions that seek to reduce intimate partner violence. Copyright © 2015. Published by Elsevier Inc.

  9. Intimate Partner Violence. Prevention Update (United States)

    Higher Education Center for Alcohol, Drug Abuse, and Violence Prevention, 2011


    The Centers for Disease Control and Prevention (CDC) defines intimate partner violence (IPV) as violence between two people in a close relationship, including current and former spouses and dating partners. IPV occurs on a continuum from a single episode to ongoing battering and can include physical violence, sexual violence, threats, emotional…

  10. Irie Classroom Toolbox: a study protocol for a cluster-randomised trial of a universal violence prevention programme in Jamaican preschools. (United States)

    Baker-Henningham, Helen; Vera-Hernández, Marcos; Alderman, Harold; Walker, Susan


    We aim to determine the effectiveness of a school-based violence prevention programme implemented in Jamaican preschools, on reducing the levels of aggression among children at school, and violence against children by teachers. This is a 2-arm, single-blind, cluster-randomised controlled trial with parallel assignment. Clusters are 76 preschools in Kingston, and all teachers and classrooms in the selected schools are included in the study. In addition, a random sample of up to 12 children in the 4-year-old classes have been selected for evaluation of child-level outcomes. The intervention involves training teachers in classroom behaviour management and in strategies to promote children's social-emotional competence. Training is delivered through five full-day workshops, monthly in-class coaching over 2 school terms, and weekly text messages. The primary outcome measures are: (1) observed levels of child aggression and (2) observed violence against children by teachers. Secondary outcomes include observations of the levels of children's prosocial behaviour and the quality of the classroom environment, teachers' reports of their mental health, teacher-reported child mental health, direct tests of children's self-regulation and child attendance. If this intervention were effective at improving the caregiving environment of young children in school, this would have significant implications for the prevention of child mental health problems, and prevention of violence against children in low and middle-income countries where services are often limited. The intervention is integrated into the school system and involves training existing staff, and thus, represents an appropriate strategy for large-scale implementation and benefits at the population level. Ethical consent for the study was given by the School of Psychology Ethics and Research Committee, Bangor University (ref: 2014-14167), and by the University of the West Indies Ethics Committee (ref: ECP 50

  11. Numerical analysis

    CERN Document Server

    Brezinski, C


    Numerical analysis has witnessed many significant developments in the 20th century. This book brings together 16 papers dealing with historical developments, survey papers and papers on recent trends in selected areas of numerical analysis, such as: approximation and interpolation, solution of linear systems and eigenvalue problems, iterative methods, quadrature rules, solution of ordinary-, partial- and integral equations. The papers are reprinted from the 7-volume project of the Journal of Computational and Applied Mathematics on '/homepage/sac/cam/na2000/index.html<

  12. Development of a numerical simulation method for melting/solidification and dissolution/precipitation phenomena. 1. Literature survey for computer program design

    International Nuclear Information System (INIS)

    Uchibori, Akihiro; Ohshima, Hiroyuki


    Survey research of numerical methods for melting/solidification and dissolution/precipitation phenomena was performed to determine the policy for a simulation program development. Melting/solidification and dissolution/ precipitation have been key issues for feasibility evaluation of several techniques applied in the nuclear fuel cycle processes. Physical models for single-component melting/solidification, two-component solution solidification or precipitation by cooling and precipitation by electrolysis, which are moving boundary problems, were made clear from the literature survey. The transport equations are used for thermal hydraulic analysis in the solid and the liquid regions. Behavior of the solid-liquid interface is described by the heat and mass transfer model. These physical models need to be introduced into the simulation program. The numerical methods for the moving boundary problems are categorized into two types: interface tracking method and interface capturing method. Based on the classification, performance of each numerical method was evaluated. The interface tracking method using the Lagrangian moving mesh requires relatively complicated algorithm. The algorithm has high accuracy for predicting the moving interface. On the other hand, the interface capturing method uses the Eulerian fixing mesh, leading to simple algorithm. Prediction accuracy of the method is relatively low. The extended finite element method classified as the interface capturing method can predict the interface behavior accurately even though the Eulerian fixing mesh is used. We decided to apply the extended finite element method to the simulation program. (author)

  13. Understanding the seismic wave propagation inside and around an underground cavity from a 3D numerical survey (United States)

    Esterhazy, Sofi; Schneider, Felix; Perugia, Ilaria; Bokelmann, Götz


    Motivated by the need to detect an underground cavity within the procedure of an On-Site-Inspection (OSI) of the Comprehensive Nuclear Test Ban Treaty Organization (CTBTO), which might be caused by a nuclear explosion/weapon testing, we aim to provide a basic numerical study of the wave propagation around and inside such an underground cavity. One method to investigate the geophysical properties of an underground cavity allowed by the Comprehensive Nuclear-test Ban Treaty is referred to as "resonance seismometry" - a resonance method that uses passive or active seismic techniques, relying on seismic cavity vibrations. This method is in fact not yet entirely determined by the Treaty and so far, there are only very few experimental examples that have been suitably documented to build a proper scientific groundwork. This motivates to investigate this problem on a purely numerical level and to simulate these events based on recent advances in numerical modeling of wave propagation problems. Our numerical study includes the full elastic wave field in three dimensions. We consider the effects from an incoming plane wave as well as point source located in the surrounding of the cavity at the surface. While the former can be considered as passive source like a tele-seismic earthquake, the latter represents a man-made explosion or a viborseis as used for/in active seismic techniques. Further we want to demonstrate the specific characteristics of the scattered wave field from a P-waves and S-wave separately. For our simulations in 3D we use the discontinuous Galerkin Spectral Element Code SPEED developed by MOX (The Laboratory for Modeling and Scientific Computing, Department of Mathematics) and DICA (Department of Civil and Environmental Engineering) at the Politecnico di Milano. The computations are carried out on the Vienna Scientific Cluster (VSC). The accurate numerical modeling can facilitate the development of proper analysis techniques to detect the remnants of an

  14. The Building Resiliency and Vocational Excellence (BRAVE) Program: a violence-prevention and role model program for young, African American males. (United States)

    Griffin, James P


    There are sharp disparities between non-Hispanic Whites and African Americans in mortality and years of potential life lost for numerous health-related conditions, including HIV/AIDS. The Building Resiliency and Vocational Excellence (BRAVE) Program is an intervention using Resiliency Networking designed for use with African American young men to help offset these disparities. Resiliency Networking incorporates coaching, career planning, and re-definition of gender roles to help young men develop a sense of purpose and future and to manage their lifestyles effectively. In addition to fostering a strong link with an older mentor, the program fosters healthy peer-to-peer relationships. The paper reports on preliminary use of the intervention and recommends future applications.

  15. Lessons Learned in Evaluating a Multisite, Comprehensive Teen Dating Violence Prevention Strategy: Design and Challenges of the Evaluation of Dating Matters: Strategies to Promote Healthy Teen Relationships. (United States)

    Niolon, Phyllis Holditch; Taylor, Bruce G; Latzman, Natasha E; Vivolo-Kantor, Alana M; Valle, Linda Anne; Tharp, Andra T


    This paper describes the multisite, longitudinal cluster randomized controlled trial (RCT) design of the evaluation of the Dating Matters: Strategies to Promote Healthy Relationships initiative, and discusses challenges faced in conducting this evaluation. Health departments in 4 communities are partnering with middle schools in high-risk, urban communities to implement 2 models of teen dating violence (TDV) prevention over 4 years. Schools were randomized to receive either the Dating Matters comprehensive strategy or the "standard of care" strategy (an existing, evidence-based TDV prevention curriculum). Our design permits comparison of the relative effectiveness of the comprehensive and standard of care strategies. Multiple cohorts of students from 46 middle schools are surveyed in middle school and high school, and parents and educators from participating schools are also surveyed. Challenges discussed in conducting a multisite RCT include site variability, separation of implementation and evaluation responsibilities, school retention, parent engagement in research activities, and working within the context of high-risk urban schools and communities. We discuss the strengths and weaknesses of our approaches to these challenges in the hopes of informing future research. Despite multiple challenges, the design of the Dating Matters evaluation remains strong. We hope this paper provides researchers who are conducting complex evaluations of behavioral interventions with thoughtful discussion of the challenges we have faced and potential solutions to such challenges.

  16. Numerical relativity

    International Nuclear Information System (INIS)

    Piran, T.


    There are many recent developments in numerical relativity, but there remain important unsolved theoretical and practical problems. The author reviews existing numerical approaches to solution of the exact Einstein equations. A framework for classification and comparison of different numerical schemes is presented. Recent numerical codes are compared using this framework. The discussion focuses on new developments and on currently open questions, excluding a review of numerical techniques. (Auth.)

  17. Designs for Evaluating the Community-Level Impact of Comprehensive Prevention Programs: Examples from the CDC Centers of Excellence in Youth Violence Prevention. (United States)

    Farrell, Albert D; Henry, David; Bradshaw, Catherine; Reischl, Thomas


    This article discusses the opportunities and challenges of developing research designs to evaluate the impact of community-level prevention efforts. To illustrate examples of evaluation designs, we describe six projects funded by the Centers for Disease Control and Prevention to evaluate multifaceted approaches to reduce youth violence in high-risk communities. Each of these projects was designed to evaluate the community-level impact of multiple intervention strategies to address individual and contextual factors that place youth at risk for violent behavior. Communities differed across projects in their setting, size, and how their boundaries were defined. Each project is using multiple approaches to compare outcomes in one or more intervention communities to those in comparison communities. Five of the projects are using comparative interrupted time-series designs to compare outcomes in an intervention community to matched comparison communities. A sixth project is using a multiple baseline design in which the order and timing of intervention activities is randomized across three communities. All six projects are also using regression point displacement designs to compare outcomes within intervention communities to those within broader sets of similar communities. Projects are using a variety of approaches to assess outcomes including archival records, surveys, and direct observations. We discuss the strengths and weaknesses of the designs of these projects and illustrate the challenges of designing high-quality evaluations of comprehensive prevention approaches implemented at the community level.

  18. Numerical modeling to assess the sensitivity and resolution of long-electrode electrical resistance tomography (LEERT) surveys to monitor CO2 migration, Phase 1B area

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez, Abelardo L. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)


    This document describes the results of a numerical modeling study that evaluated whether LEERT could be used successfully to monitor CO2 distribution in the Weyburn- Midale reservoir, Phase 1B area. The magnitude of electrical resistivity changes and the technique’s resolution depend on many site-specific factors including well separation distances, casing lengths, reservoir depth, thickness, and composition, and the effect of CO2 on the electrical properties of the reservoir. Phase 1B-specific numerical modeling of the electrical response to CO2 injection has been performed to assess sensitivity and resolution of the electrical surveys.

  19. Numerical analysis

    CERN Document Server

    Khabaza, I M


    Numerical Analysis is an elementary introduction to numerical analysis, its applications, limitations, and pitfalls. Methods suitable for digital computers are emphasized, but some desk computations are also described. Topics covered range from the use of digital computers in numerical work to errors in computations using desk machines, finite difference methods, and numerical solution of ordinary differential equations. This book is comprised of eight chapters and begins with an overview of the importance of digital computers in numerical analysis, followed by a discussion on errors in comput

  20. Numerical relativity

    CERN Document Server

    Shibata, Masaru


    This book is composed of two parts: First part describes basics in numerical relativity, that is, the formulations and methods for a solution of Einstein's equation and general relativistic matter field equations. This part will be helpful for beginners of numerical relativity who would like to understand the content of numerical relativity and its background. The second part focuses on the application of numerical relativity. A wide variety of scientific numerical results are introduced focusing in particular on the merger of binary neutron stars and black holes.

  1. Numerical analysis of bifurcations

    International Nuclear Information System (INIS)

    Guckenheimer, J.


    This paper is a brief survey of numerical methods for computing bifurcations of generic families of dynamical systems. Emphasis is placed upon algorithms that reflect the structure of the underlying mathematical theory while retaining numerical efficiency. Significant improvements in the computational analysis of dynamical systems are to be expected from more reliance of geometric insight coming from dynamical systems theory. copyright 1996 American Institute of Physics

  2. Electoral Violence Prevention:What Works?


    Birch, Sarah; Muchlinski, David


    Elections are in theory democratic means of resolving disputes and making collective decisions, yet too often force is employed to distort the electoral process. The post-Cold War increase in the number of electoral authoritarian and hybrid states has brought this problem into relief. In recent years the prevention of electoral violence has played an increasingly large role in the democratic assistance activities undertaken by international agencies, following increased awareness within the i...

  3. Cost analysis of youth violence prevention. (United States)

    Sharp, Adam L; Prosser, Lisa A; Walton, Maureen; Blow, Frederic C; Chermack, Stephen T; Zimmerman, Marc A; Cunningham, Rebecca


    Effective violence interventions are not widely implemented, and there is little information about the cost of violence interventions. Our goal is to report the cost of a brief intervention delivered in the emergency department that reduces violence among 14- to 18-year-olds. Primary outcomes were total costs of implementation and the cost per violent event or violence consequence averted. We used primary and secondary data sources to derive the costs to implement a brief motivational interviewing intervention and to identify the number of self-reported violent events (eg, severe peer aggression, peer victimization) or violence consequences averted. One-way and multi-way sensitivity analyses were performed. Total fixed and variable annual costs were estimated at $71,784. If implemented, 4208 violent events or consequences could be prevented, costing $17.06 per event or consequence averted. Multi-way sensitivity analysis accounting for variable intervention efficacy and different cost estimates resulted in a range of $3.63 to $54.96 per event or consequence averted. Our estimates show that the cost to prevent an episode of youth violence or its consequences is less than the cost of placing an intravenous line and should not present a significant barrier to implementation.

  4. Violence Prevention, Access to Justice, and Economic ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Women and inequality in Latin America Women's economic empowerment and the reduction of violence against women have become urgent priorities in the political and social agendas of Latin American countries. This is particularly true given ... Equidad de Género: Ciudadanía, Trabajo y Familia, A.C.. Pays d' institution.

  5. Community asset mapping for violence prevention

    African Journals Online (AJOL)


    Medical Research Council and Institute for Social and Health Sciences, University of ... 1 Please direct all correspondence to: Teresa Cutts, Wake Forest School of ... assets lie in networks and relationships, focusing on making community ...... fire departments going to elementary schools to tell children about their jobs).

  6. Violence Prevention, Access to Justice, and Economic ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Solutions to empower women, reduce violence Researchers will identify and analyze interventions in Colombia, Guatemala, Mexico, and Peru. They will assess the impact of efforts on: -preventing violence against women -reducing victimization -improving women's access to justice The results will guide governments, civil ...

  7. Television Violence: Implications for Violence Prevention. (United States)

    Hughes, Jan N.; Hasbrouck, Jan E.


    Reviews the scientific and public-opinion debate on the impact television violence in America has on aggression and violence. Research supports the view that television violence contributes to children's level of aggressiveness and subsequent violence and criminality. Describes attempts to improve the quality of television programming for children…

  8. Teen Dating Violence Prevention Program Assessment (United States)

    Lucas, Quincy Arrianna Rose


    The American Psychological Association (APA) has identified the prevention of and intervention in relationship violence as a top priority (APA, n.d.). According to the Center for Disease Control and Prevention's 2012 Teen Dating Violence Fact Sheet, dating violence is a serious problem in the United States. In accordance with Foshee et al. (1998):…

  9. Numerical Development (United States)

    Siegler, Robert S.; Braithwaite, David W.


    In this review, we attempt to integrate two crucial aspects of numerical development: learning the magnitudes of individual numbers and learning arithmetic. Numerical magnitude development involves gaining increasingly precise knowledge of increasing ranges and types of numbers: from non-symbolic to small symbolic numbers, from smaller to larger…

  10. Hindi Numerals. (United States)

    Bright, William

    In most languages encountered by linguists, the numerals, considered as a paradigmatic set, constitute a morpho-syntactic problem of only moderate complexity. The Indo-Aryan language family of North India, however, presents a curious contrast. The relatively regular numeral system of Sanskrit, as it has developed historically into the modern…

  11. Numerical analysis

    CERN Document Server

    Rao, G Shanker


    About the Book: This book provides an introduction to Numerical Analysis for the students of Mathematics and Engineering. The book is designed in accordance with the common core syllabus of Numerical Analysis of Universities of Andhra Pradesh and also the syllabus prescribed in most of the Indian Universities. Salient features: Approximate and Numerical Solutions of Algebraic and Transcendental Equation Interpolation of Functions Numerical Differentiation and Integration and Numerical Solution of Ordinary Differential Equations The last three chapters deal with Curve Fitting, Eigen Values and Eigen Vectors of a Matrix and Regression Analysis. Each chapter is supplemented with a number of worked-out examples as well as number of problems to be solved by the students. This would help in the better understanding of the subject. Contents: Errors Solution of Algebraic and Transcendental Equations Finite Differences Interpolation with Equal Intervals Interpolation with Unequal Int...

  12. Numerical analysis

    CERN Document Server

    Scott, L Ridgway


    Computational science is fundamentally changing how technological questions are addressed. The design of aircraft, automobiles, and even racing sailboats is now done by computational simulation. The mathematical foundation of this new approach is numerical analysis, which studies algorithms for computing expressions defined with real numbers. Emphasizing the theory behind the computation, this book provides a rigorous and self-contained introduction to numerical analysis and presents the advanced mathematics that underpin industrial software, including complete details that are missing from most textbooks. Using an inquiry-based learning approach, Numerical Analysis is written in a narrative style, provides historical background, and includes many of the proofs and technical details in exercises. Students will be able to go beyond an elementary understanding of numerical simulation and develop deep insights into the foundations of the subject. They will no longer have to accept the mathematical gaps that ex...

  13. Interactions between Point Bar Growth and Bank Erosion on a Low Sinuosity Meander Bend in an Ephemeral Channel: Insights from Repeat Topographic Surveys and Numerical Modeling (United States)

    Ursic, M.; Langendoen, E. J.


    Interactions between point bar growth, bank migration, and hydraulics on meandering rivers are complicated and not well understood. For ephemeral streams, rapid fluctuations in flow further complicate studying and understanding these interactions. This study seeks to answer the following `cause-and-effect' question: Does point bar morphologic adjustment determine where bank erosion occurs (for example, through topographic steering of the flow), or does local bank retreat determine where accretion/erosion occurs on the point bar, or do bank erosion and point bar morphologic adjustment co-evolve? Further, is there a response time between the `cause-and-effect' processes and what variables determine its magnitude and duration? In an effort to answer these questions for an ephemeral stream, a dataset of forty-eight repeat topographic surveys over a ten-year period (1996-2006) of a low sinuosity bend within the Goodwin Creek Experimental Watershed, located near Batesville, MS, were utilized in conjunction with continuous discharge measurements to correlate flow variability and erosional and depositional zones, spatially and temporally. Hydraulically, the bend is located immediately downstream of a confluence with a major tributary. Supercritical flumes on both the primary and tributary channels just upstream of the confluence provide continuous measured discharges to the bend over the survey period. In addition, water surface elevations were continuously measured at the upstream and downstream ends of the bend. No spatial correlation trends could be discerned between reach-scale bank retreat, point bar morphologic adjustment, and flow discharge. Because detailed flow patterns were not available, the two-dimensional computer model Telemac2D was used to provide these details. The model was calibrated and validated for a set of runoff events for which more detailed flow data were available. Telemac2D simulations were created for each topographic survey period. Flows

  14. Numerical Relativity (United States)

    Baker, John G.


    Recent advances in numerical relativity have fueled an explosion of progress in understanding the predictions of Einstein's theory of gravity, General Relativity, for the strong field dynamics, the gravitational radiation wave forms, and consequently the state of the remnant produced from the merger of compact binary objects. I will review recent results from the field, focusing on mergers of two black holes.

  15. Study on tsunami due to offshore earthquakes for Korea coast. Literature survey and numerical simulation on earthquake and tsunami in the Japan Sea and the East China Sea

    International Nuclear Information System (INIS)

    Matsuyama, Masafumi; Aoyagi, Yasuhira; Inoue, Daiei; Choi, Weon-Hack; Kang, Keum-Seok


    In Korea, there has been a concern on tsumami risks for the Nuclear Power Plants since the 1983 Nihonkai-Chubu earthquake tsunami. The maximum run-up height reached 4 m to north of the Ulchin nuclear power plant site. The east coast of Korea was also attacked by a few meters high tsunami generated by the 1993 Hokkaido Nansei-Oki earthquake. Both source areas of them were in the areas western off Hokkaido to the eastern margin of the Japan Sea, which remains another tsunami potential. Therefore it is necessary to study tsunami risks for coast of Korea by means of geological investigation and numerical simulation. Historical records of earthquake and tsunami in the Japan Sea were re-compiled to evaluate tsunami potential. A database of marine active faults in the Japan Sea was compiled to decide a regional potential of tsunami. Many developed reverse faults are found in the areas western off Hokkaido to the eastern margin of the Japan Sea. The authors have found no historical earthquake in the East China Sea which caused tunami observed at coast of Korea. Therefore five fault models were determined on the basis of the analysis results of historical records and recent research results of fault parameter and tunami. Tsunami heights were estimated by numerical simulation of nonlinear dispersion wave theory. The results of the simulations indicate that the tsunami heights in these cases are less than 0.25 m along the coast of Korea, and the tsunami risk by these assumed faults does not lead to severe impact. It is concluded that tsunami occurred in the areas western off Hokkaido to the eastern margin of the Japan Sea leads the most significant impact to Korea consequently. (author)

  16. Numerical relativity

    CERN Document Server

    Nakamura, T


    In GR13 we heard many reports on recent. progress as well as future plans of detection of gravitational waves. According to these reports (see the report of the workshop on the detection of gravitational waves by Paik in this volume), it is highly probable that the sensitivity of detectors such as laser interferometers and ultra low temperature resonant bars will reach the level of h ~ 10—21 by 1998. in this level we may expect the detection of the gravitational waves from astrophysical sources such as coalescing binary neutron stars once a year or so. Therefore the progress in numerical relativity is urgently required to predict the wave pattern and amplitude of the gravitational waves from realistic astrophysical sources. The time left for numerical relativists is only six years or so although there are so many difficulties in principle as well as in practice.

  17. Treatment approach, delivery, and follow-up evaluation for cardiac rhythm disease management patients receiving radiation therapy: Retrospective physician surveys including chart reviews at numerous centers

    Energy Technology Data Exchange (ETDEWEB)

    Gossman, Michael S., E-mail: [Regulation Directive Medical Physics, Russell, KY (United States); Wilkinson, Jeffrey D. [Medtronic, Inc., Mounds View, MN (United States); Mallick, Avishek [Department of Mathematics, Marshall University, Huntington, WV (United States)


    In a 2-part study, we first examined the results of 71 surveyed physicians who provided responses on how they address the management of patients who maintained either a pacemaker or a defibrillator during radiation treatment. Second, a case review study is presented involving 112 medical records reviewed at 18 institutions to determine whether there was a change in the radiation prescription for the treatment of the target cancer, the method of radiation delivery, or the method of radiation image acquisition. Statistics are provided to illustrate the level of administrative policy; the level of communication between radiation oncologists and heart specialists; American Joint Committee on Cancer (AJCC) staging and classification; National Comprehensive Cancer Network (NCCN) guidelines; tumor site; patient's sex; patient's age; device type; manufacturer; live monitoring; and the reported decisions for planning, delivery, and imaging. This survey revealed that 37% of patient treatments were considered for some sort of change in this regard, whereas 59% of patients were treated without regard to these alternatives when available. Only 3% of all patients were identified with an observable change in the functionality of the device or patient status in comparison with 96% of patients with normal behavior and operating devices. Documented changes in the patient's medical record included 1 device exhibiting failure at 0.3-Gy dose, 1 device exhibiting increased sensor rate during dose delivery, 1 patient having an irregular heartbeat leading to device reprogramming, and 1 patient complained of twinging in the chest wall that resulted in a respiratory arrest. Although policies and procedures should directly involve the qualified medical physicist for technical supervision, their sufficient involvement was typically not requested by most respondents. No treatment options were denied to any patient based on AJCC staging, classification, or NCCN practice standards.

  18. Numerical Analysis of Residual Stress and Distortion Use Finite Element Method on Inner Bottom Construction of Geomarin IV Survey Ship with Welding Sequence Variations (United States)

    Syahroni, N.; Hartono, A. B. W.; Murtedjo, M.


    In the ship fabrication industry, welding is the most critical stage. If the quality of welding on ship fabrication is not good, then it will affect the strength and overall appearance of the structure. One of the factors that affect the quality of welding is residual stress and distortion. In this research welding simulation is performed on the inner bottom construction of Geomarin IV Ship Survey using shell element and has variation to welding sequence. In this study, welding simulations produced peak temperatures at 2490 K at variation 4. While the lowest peak temperature was produced by variation 2 with a temperature of 2339 K. After welding simulation, it continued simulating residual stresses and distortion. The smallest maximum tensile residual stress found in the inner bottom construction is 375.23 MPa, and the maximum tensile pressure is -20.18 MPa. The residual stress is obtained from variation 3. The distortion occurring in the inner bottom construction for X=720 mm is 4.2 mm and for X=-720 mm, the distortion is 4.92 mm. The distortion is obtained from the variation 3. Near the welding area, distortion value reaches its minimum point. This is because the stiffeners in the form of frames serves as anchoring.

  19. Fault detection by Turam TEM survey. Numerical model studies and a case history; TEM ho Turam sokutei haichi ni yoru danso kenshutsu no kokoromi. Model keisan to jisshirei

    Energy Technology Data Exchange (ETDEWEB)

    Wada, K; Tsutsui, T [Mitsui Mineral Development Engineering Co. Ltd., Tokyo (Japan); Ito, T [Chiba Univ., Chiba (Japan). Faculty of Science; Takeuchi, A [Toyama University, Toyama (Japan). Faculty of Science; He, P [Power Reactor and Nuclear fuel Development Corp., Tokyo (Japan)


    With an objective to detect faults estimated to exist along the Shigesumi valley in the Kamioka mine, discussions were given by using electromagnetic survey, which uses the Turam measurement arrangement based on the TEM method, and three-dimensional model calculations. The Turam measurement arrangement, which installs transmission loop fixedly, is used to identify nature and distribution of electrically conductive objects upon noticing abnormal portions in magnetic fields in the measurement data. In the model calculation, the plate model calculation method and the FDTD method were used, and so was the calculation code TEM3DL. The result revealed that strong topographical influence is seen from steep V-shaped valley existing along the traverse line in the measurement data, but an abnormal resistivity band accompanying remarkable distortion in the curve was detected. According to the result of the model calculation, anomaly detection may be found difficult in locations where a low resistivity band has not grown enough locally. It was possible from these facts to assume a model in which the low resistivity band exists directly below the Shigesumi valley, suggesting existence of faults. 2 refs., 8 figs.

  20. Numerical analysis

    CERN Document Server

    Jacques, Ian


    This book is primarily intended for undergraduates in mathematics, the physical sciences and engineering. It introduces students to most of the techniques forming the core component of courses in numerical analysis. The text is divided into eight chapters which are largely self-contained. However, with a subject as intricately woven as mathematics, there is inevitably some interdependence between them. The level of difficulty varies and, although emphasis is firmly placed on the methods themselves rather than their analysis, we have not hesitated to include theoretical material when we consider it to be sufficiently interesting. However, it should be possible to omit those parts that do seem daunting while still being able to follow the worked examples and to tackle the exercises accompanying each section. Familiarity with the basic results of analysis and linear algebra is assumed since these are normally taught in first courses on mathematical methods. For reference purposes a list of theorems used in the t...

  1. Survey of numerical methods for compressible fluids

    Energy Technology Data Exchange (ETDEWEB)

    Sod, G A


    The finite difference methods of Godunov, Hyman, Lax-Wendroff (two-step), MacCormack, Rusanov, the upwind scheme, the hybrid scheme of Harten and Zwas, the antidiffusion method of Boris and Book, and the artificial compression method of Harten are compared with the random choice known as Glimm's method. The methods are used to integrate the one-dimensional equations of gas dynamics for an inviscid fluid. The results are compared and demonstrate that Glimm's method has several advantages. 16 figs., 4 tables.

  2. Numerical Optimization in Microfluidics

    DEFF Research Database (Denmark)

    Jensen, Kristian Ejlebjærg


    Numerical modelling can illuminate the working mechanism and limitations of microfluidic devices. Such insights are useful in their own right, but one can take advantage of numerical modelling in a systematic way using numerical optimization. In this chapter we will discuss when and how numerical...... optimization is best used....

  3. Methods of numerical relativity

    International Nuclear Information System (INIS)

    Piran, T.


    Numerical Relativity is an alternative to analytical methods for obtaining solutions for Einstein equations. Numerical methods are particularly useful for studying generation of gravitational radiation by potential strong sources. The author reviews the analytical background, the numerical analysis aspects and techniques and some of the difficulties involved in numerical relativity. (Auth.)

  4. Vijana Vijiweni II: a cluster-randomized trial to evaluate the efficacy of a microfinance and peer health leadership intervention for HIV and intimate partner violence prevention among social networks of young men in Dar es Salaam. (United States)

    Kajula, Lusajo; Balvanz, Peter; Kilonzo, Mrema Noel; Mwikoko, Gema; Yamanis, Thespina; Mulawa, Marta; Kajuna, Deus; Hill, Lauren; Conserve, Donaldson; Reyes, Heathe Luz McNaughton; Leatherman, Sheila; Singh, Basant; Maman, Suzanne


    Intimate partner violence (IPV) and sexually transmitted infections (STIs), including HIV, remain important public health problems with devastating health effects for men and women in sub-Saharan Africa. There have been calls to engage men in prevention efforts, however, we lack effective approaches to reach and engage them. Social network approaches have demonstrated effective and sustained outcomes on changing risk behaviors in the U.S. Our team has identified and engaged naturally occurring social networks comprised mostly of young men in Dar es Salaam in an intervention designed to jointly reduce STI incidence and the perpetration of IPV. These stable networks are locally referred to as "camps." In a pilot study we demonstrated the feasibility and acceptability of a combined microfinance and peer health leadership intervention within these camp-based peer networks. We are implementing a cluster-randomized trial to evaluate the efficacy of an intervention combining microfinance with health leadership training in 60 camps in Dar es Salaam, Tanzania. Half of the camps have been randomized to the intervention arm, and half to a control arm. The camps in the intervention arm will receive a combined microfinance and health leadership intervention for a period of two years. The camps in the control arm will receive a delayed intervention. We have enrolled 1,258 men across the 60 study camps. Behavioral surveys will be conducted at baseline, 12-months post intervention launch and 30-month post intervention launch and biological samples will be drawn to test for Neisseria gonorrhea (NG), Chlamydia trachomatis (CT), and Trichomonas vaginalis (TV) at baseline and 30-months. The primary endpoints for assessing intervention impact are IPV perpetration and STI incidence. This is the first cluster-randomized trial targeting social networks of men in sub-Saharan Africa that jointly addresses HIV and IPV perpetration and has both biological and behavioral endpoints. Effective

  5. Stepping Stones and Creating Futures intervention: shortened interrupted time series evaluation of a behavioural and structural health promotion and violence prevention intervention for young people in informal settlements in Durban, South Africa. (United States)

    Jewkes, Rachel; Gibbs, Andrew; Jama-Shai, Nwabisa; Willan, Samantha; Misselhorn, Alison; Mushinga, Mildred; Washington, Laura; Mbatha, Nompumelelo; Skiweyiya, Yandisa


    Gender-based violence and HIV are highly prevalent in the harsh environment of informal settlements and reducing violence here is very challenging. The group intervention Stepping Stones has been shown to reduce men's perpetration of violence in more rural areas, but violence experienced by women in the study was not affected. Economic empowerment interventions with gender training can protect older women from violence, but microloan interventions have proved challenging with young women. We investigated whether combining a broad economic empowerment intervention and Stepping Stones could impact on violence among young men and women. The intervention, Creating Futures, was developed as a new generation of economic empowerment intervention, which enabled livelihood strengthening though helping participants find work or set up a business, and did not give cash or make loans. We piloted Stepping Stones with Creating Futures in two informal settlements of Durban with 232 out of school youth, mostly aged 18-30 and evaluated with a shortened interrupted time series of two baseline surveys and at 28 and 58 weeks post-baseline. 94/110 men and 111/122 women completed the last assessment, 85.5% and 90.2% respectively of those enrolled. To determine trend, we built random effects regression models with each individual as the cluster for each variable, and measured the slope of the line across the time points. Men's mean earnings in the past month increased by 247% from R411 (~$40) to R1015 (~$102, and women's by 278% R 174 (~$17) to R 484 (about $48) (trend test, p < 0.0001). There was a significant reduction in women's experience of the combined measure of physical and/or sexual IPV in the prior three months from 30.3% to 18.9% (p = 0.037). This was not seen for men. However both men and women scored significantly better on gender attitudes and men significantly reduced their controlling practices in their relationship. The prevalence of moderate or severe depression

  6. Zdeněk Kopal: Numerical Analyst (United States)

    Křížek, M.


    We give a brief overview of Zdeněk Kopal's life, his activities in the Czech Astronomical Society, his collaboration with Vladimír Vand, and his studies at Charles University, Cambridge, Harvard, and MIT. Then we survey Kopal's professional life. He published 26 monographs and 20 conference proceedings. We will concentrate on Kopal's extensive monograph Numerical Analysis (1955, 1961) that is widely accepted to be the first comprehensive textbook on numerical methods. It describes, for instance, methods for polynomial interpolation, numerical differentiation and integration, numerical solution of ordinary differential equations with initial or boundary conditions, and numerical solution of integral and integro-differential equations. Special emphasis will be laid on error analysis. Kopal himself applied numerical methods to celestial mechanics, in particular to the N-body problem. He also used Fourier analysis to investigate light curves of close binaries to discover their properties. This is, in fact, a problem from mathematical analysis.

  7. Surveying Future Surveys (United States)

    Carlstrom, John E.


    The now standard model of cosmology has been tested and refined by the analysis of increasingly sensitive, large astronomical surveys, especially with statistically significant millimeter-wave surveys of the cosmic microwave background and optical surveys of the distribution of galaxies. This talk will offer a glimpse of the future, which promises an acceleration of this trend with cosmological information coming from new surveys across the electromagnetic spectrum as well as particles and even gravitational waves.

  8. Updates on adolescent dating and sexual violence prevention and intervention. (United States)

    Miller, Elizabeth; Jones, Kelley A; McCauley, Heather L


    Dating and sexual violence victimization are not uncommon in early adolescence and increase in prevalence throughout adolescence into young adulthood with profound health and social consequences. Greater attention to what works in prevention is needed to inform current policies and practices. Adolescent dating violence (ADV) and sexual violence victimization, including cyber dating abuse, are highly prevalent among adolescents. Studies have found sex category differences, with adolescent girls reporting more victimization than boys, particularly sexual violence. Sexual and gender minority youth also experience a higher prevalence of violence victimization than their heterosexual counterparts. Studies on risk factors include examinations of childhood adversities, exposure to sexually explicit material and substance use as well as the role of gender inequitable attitudes on violence perpetration. Recent prevention research includes examining the impact of bystander interventions and transforming gender norms. Recent ADV/ sexual violence research highlights both prevalence and modifiable risk and protective factors that may help reduce such violence. Practitioners caring for youth should consider ADV/ sexual violence when seeing patients (including those struggling with substance use and other behaviours that contribute to poor health) and not simply rely on screening tools to identify those suffering from ADV/ sexual violence.

  9. Sexual Violence Prevention in Indiana: Toward Safer, Healthier Communities (United States)

    Cierniak, Katie; Heiman, Julia R.; Plucker, Jonathan A.


    For roughly three decades, policymakers have sought to reduce sexual violence by reliance on a criminal justice approach in which sexually violent acts are dealt with after they occur. Recognizing that prevention efforts could be more valuable, as they work to stop the problem before it begins, researchers have begun to implement a primary…

  10. Sexual Violence Prevention: The Role of Stages of Change (United States)

    Banyard, Victoria L.; Eckstein, Robert P.; Moynihan, Mary M.


    Increasing numbers of empirical studies and theoretical frameworks for preventing sexual violence are appearing in the research- and practice-based literatures. The consensus of this work is that although important lessons have been learned, the field is still in the early stages of developing and fully researching effective models, particularly…

  11. The role of the pediatrician in youth violence prevention

    Directory of Open Access Journals (Sweden)

    Soon Ki Kim


    Full Text Available School bullying has become a major social problem in Korea after the emergence of media reports on children who committed suicide after being victimized by bullies. In this article, we review the characteristics of bullying, and investigate the role of the pediatrician in the prevention of and intervention against bullying and school violence. Bullying can take on many forms such as physical threat, verbal humiliation, malicious rumors, and social ostracism. The prevalence of bullying in various countries is approximately 10% to 20%. In Korea, the prevalence of school violence is similar but seems to be more intense because of the highly competitive environment. From our review of literature, we found that children who were bullied had a significantly higher risk of developing psychosomatic and psychosocial problems such as headache, abdominal pain, anxiety, and depression than those who were not bullied. Hence, it is important for health practitioners to detect these signs in a child who was bullied by questioning and examining the child, and to determine whether bullying plays a contributing role when a child exhibits such signs. Pediatricians can play an important role in the prevention of or intervention against school violence along with school authorities, parents, and community leaders. Moreover, guidelines to prevent school violence, such as the Olweus Bullying Prevention Program, KiVa of the Finish Ministry of Education, and Connected Kids: Safe, Strong, Secure of the American Academy Pediatrics, should be implemented.

  12. Impact of a Rural Domestic Violence Prevention Campaign. (United States)

    Gadomski, Anne M.; Tripp, Maria; Wolff, Debra A.; Lewis, Carol; Jenkins, Paul


    A 7-month public health information campaign used radio advertising, mass media articles, mailings, and posters to address attitudes and behavioral intentions toward domestic violence in a rural county. The campaign raised public awareness, particularly among men; increased stated intentions to intervene in a neighbor's domestic violence; and…

  13. Building consensus on youth violence prevention and citizen ...

    International Development Research Centre (IDRC) Digital Library (Canada)


    Apr 20, 2016 ... ... promising practices, intervention models, methodologies, and public policies to ... Building on the IDRC and Organization of American States ... Involving urban communities in controlling dengue fever in Latin America.

  14. Building consensus on youth violence prevention and citizen ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    IDRC's efforts in negotiation and coalition building contributed to a high-level dialogue that engaged high-level officials and reaffirmed their commitment to preventing violence particularly among youth in Central America. At a meeting held at the Earth University in Costa Rica´s Limon Province in early February, Luis Fallas, ...

  15. An overview of Tennessee state legislation affecting violence prevention. (United States)

    DeBerry, L M


    Homicide is the number one cause of death among African American youth, both male and female. Largely to blame for Black-on-Black violence is the sense of alienation our youth feel from society. To counter this phenomenon of violence it is essential to empower youth. Through education and community-based programs we can draw them away from the materialistic to the realistic. By banding together as mentors to our youth we can provide them with a sense of history and heritage, and thereby equip them with the self-identity originating from self-respect.

  16. Violence Prevention in United States Society of Jesus Secondary Schools (United States)

    Simonds, Thomas Andrew


    Using data from a representative number of Society of Jesus secondary schools, the researcher reports what these schools are doing to prevent violence, and tests an explanatory model of school violence he created. The researcher proposes that this model can be used to explain and prevent school violence by identifying and addressing the…

  17. U.S. Teachers' Perceptions of School Violence Prevention Programs (United States)

    Chestnut, Natakie


    In response to high profile violent incidents and crimes, many schools have developed plans that address school discipline to create a school climate and culture wherein everyone is valued and treated with respect. The problem that prompted this study is teachers are struggling with effectively implementation prevention program. The purpose of…

  18. Urban upgrading for violence prevention in South Africa: Does it ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    ... on the kinds of investments and interventions needed to address urban violence. ... in Latin America and the Caribbean, South Asia, and sub-Saharan Africa. ... its 2017 call for proposals to establish Cyber Policy Centres in the Global South.

  19. Average-case analysis of numerical problems

    CERN Document Server


    The average-case analysis of numerical problems is the counterpart of the more traditional worst-case approach. The analysis of average error and cost leads to new insight on numerical problems as well as to new algorithms. The book provides a survey of results that were mainly obtained during the last 10 years and also contains new results. The problems under consideration include approximation/optimal recovery and numerical integration of univariate and multivariate functions as well as zero-finding and global optimization. Background material, e.g. on reproducing kernel Hilbert spaces and random fields, is provided.

  20. Numerical methods using Matlab

    CERN Document Server

    Lindfield, George


    Numerical Methods using MATLAB, 3e, is an extensive reference offering hundreds of useful and important numerical algorithms that can be implemented into MATLAB for a graphical interpretation to help researchers analyze a particular outcome. Many worked examples are given together with exercises and solutions to illustrate how numerical methods can be used to study problems that have applications in the biosciences, chaos, optimization, engineering and science across the board. Numerical Methods using MATLAB, 3e, is an extensive reference offering hundreds of use

  1. Numerical ability predicts mortgage default. (United States)

    Gerardi, Kristopher; Goette, Lorenz; Meier, Stephan


    Unprecedented levels of US subprime mortgage defaults precipitated a severe global financial crisis in late 2008, plunging much of the industrialized world into a deep recession. However, the fundamental reasons for why US mortgages defaulted at such spectacular rates remain largely unknown. This paper presents empirical evidence showing that the ability to perform basic mathematical calculations is negatively associated with the propensity to default on one's mortgage. We measure several aspects of financial literacy and cognitive ability in a survey of subprime mortgage borrowers who took out loans in 2006 and 2007, and match them to objective, detailed administrative data on mortgage characteristics and payment histories. The relationship between numerical ability and mortgage default is robust to controlling for a broad set of sociodemographic variables, and is not driven by other aspects of cognitive ability. We find no support for the hypothesis that numerical ability impacts mortgage outcomes through the choice of the mortgage contract. Rather, our results suggest that individuals with limited numerical ability default on their mortgage due to behavior unrelated to the initial choice of their mortgage.

  2. Numerical ability predicts mortgage default (United States)

    Gerardi, Kristopher; Goette, Lorenz; Meier, Stephan


    Unprecedented levels of US subprime mortgage defaults precipitated a severe global financial crisis in late 2008, plunging much of the industrialized world into a deep recession. However, the fundamental reasons for why US mortgages defaulted at such spectacular rates remain largely unknown. This paper presents empirical evidence showing that the ability to perform basic mathematical calculations is negatively associated with the propensity to default on one’s mortgage. We measure several aspects of financial literacy and cognitive ability in a survey of subprime mortgage borrowers who took out loans in 2006 and 2007, and match them to objective, detailed administrative data on mortgage characteristics and payment histories. The relationship between numerical ability and mortgage default is robust to controlling for a broad set of sociodemographic variables, and is not driven by other aspects of cognitive ability. We find no support for the hypothesis that numerical ability impacts mortgage outcomes through the choice of the mortgage contract. Rather, our results suggest that individuals with limited numerical ability default on their mortgage due to behavior unrelated to the initial choice of their mortgage. PMID:23798401

  3. Numerical distance protection

    CERN Document Server

    Ziegler, Gerhard


    Distance protection provides the basis for network protection in transmission systems and meshed distribution systems. This book covers the fundamentals of distance protection and the special features of numerical technology. The emphasis is placed on the application of numerical distance relays in distribution and transmission systems.This book is aimed at students and engineers who wish to familiarise themselves with the subject of power system protection, as well as the experienced user, entering the area of numerical distance protection. Furthermore it serves as a reference guide for s

  4. Numerical problems in physics

    CERN Document Server

    Singh, Devraj


    Numerical Problems in Physics, Volume 1 is intended to serve the need of the students pursuing graduate and post graduate courses in universities with Physics and Materials Science as subject including those appearing in engineering, medical, and civil services entrance examinations. KEY FEATURES: * 29 chapters on Optics, Wave & Oscillations, Electromagnetic Field Theory, Solid State Physics & Modern Physics * 540 solved numerical problems of various universities and ompetitive examinations * 523 multiple choice questions for quick and clear understanding of subject matter * 567 unsolved numerical problems for grasping concepts of the various topic in Physics * 49 Figures for understanding problems and concept

  5. Remarks on numerical semigroups

    International Nuclear Information System (INIS)

    Torres, F.


    We extend results on Weierstrass semigroups at ramified points of double covering of curves to any numerical semigroup whose genus is large enough. As an application we strengthen the properties concerning Weierstrass weights state in [To]. (author). 25 refs

  6. Numerical semigroups and applications

    CERN Document Server

    Assi, Abdallah


    This work presents applications of numerical semigroups in Algebraic Geometry, Number Theory, and Coding Theory. Background on numerical semigroups is presented in the first two chapters, which introduce basic notation and fundamental concepts and irreducible numerical semigroups. The focus is in particular on free semigroups, which are irreducible; semigroups associated with planar curves are of this kind. The authors also introduce semigroups associated with irreducible meromorphic series, and show how these are used in order to present the properties of planar curves. Invariants of non-unique factorizations for numerical semigroups are also studied. These invariants are computationally accessible in this setting, and thus this monograph can be used as an introduction to Factorization Theory. Since factorizations and divisibility are strongly connected, the authors show some applications to AG Codes in the final section. The book will be of value for undergraduate students (especially those at a higher leve...

  7. Advances in Numerical Methods

    CERN Document Server

    Mastorakis, Nikos E


    Features contributions that are focused on significant aspects of current numerical methods and computational mathematics. This book carries chapters that advanced methods and various variations on known techniques that can solve difficult scientific problems efficiently.

  8. Introductory numerical analysis

    CERN Document Server

    Pettofrezzo, Anthony J


    Written for undergraduates who require a familiarity with the principles behind numerical analysis, this classical treatment encompasses finite differences, least squares theory, and harmonic analysis. Over 70 examples and 280 exercises. 1967 edition.

  9. Introduction to numerical analysis

    CERN Document Server

    Hildebrand, F B


    Well-known, respected introduction, updated to integrate concepts and procedures associated with computers. Computation, approximation, interpolation, numerical differentiation and integration, smoothing of data, other topics in lucid presentation. Includes 150 additional problems in this edition. Bibliography.

  10. Numerical computations with GPUs

    CERN Document Server

    Kindratenko, Volodymyr


    This book brings together research on numerical methods adapted for Graphics Processing Units (GPUs). It explains recent efforts to adapt classic numerical methods, including solution of linear equations and FFT, for massively parallel GPU architectures. This volume consolidates recent research and adaptations, covering widely used methods that are at the core of many scientific and engineering computations. Each chapter is written by authors working on a specific group of methods; these leading experts provide mathematical background, parallel algorithms and implementation details leading to

  11. Numerical studies on divertor experiments

    International Nuclear Information System (INIS)

    Ueda, N.; Itoh, K.; Itoh, S.-I.; Tanaka, M.; Hasegawa, M.; Shoji, T.; Sugihara, M.


    Numerical analysis on the divertor experiments such as JFT-2M tokamak is made by use of the two-dimensional time-dependent simulation code. The plasma in the scrape-off layer (SOL) and divertor region is solved for the given particle and heat sources from the main plasma, Γ p and Q T . Effect of the direction of the toroidal magnetic field is studied. It is found that the heat flux which is proportional to b vector x ∇T i has influences on the divertor plasmas, but has a small effect on the parameters on the midplane in the framework of the fluid model. Parameter survey on Γ p and Q T is made. The transient response of the SOL/divertor plasma to the sudden change of Γ p and Q T is studied. Time delay in the SOL and divertor region is calculated. (author)

  12. Numerical Transducer Modeling

    DEFF Research Database (Denmark)

    Henriquez, Vicente Cutanda

    This thesis describes the development of a numerical model of the propagation of sound waves in fluids with viscous and thermal losses, with application to the simulation of acoustic transducers, in particular condenser microphones for measurement. The theoretical basis is presented, numerical...... manipulations are developed to satisfy the more complicated boundary conditions, and a model of a condenser microphone with a coupled membrane is developed. The model is tested against measurements of ¼ inch condenser microphones and analytical calculations. A detailed discussion of the results is given....

  13. On numerical Bessel transformation

    International Nuclear Information System (INIS)

    Sommer, B.; Zabolitzky, J.G.


    The authors present a computer program to calculate the three dimensional Fourier or Bessel transforms and definite integrals with Bessel functions. Numerical integration of systems containing Bessel functions occurs in many physical problems, e.g. electromagnetic form factor of nuclei, all transitions involving multipole expansions at high momenta. Filon's integration rule is extended to spherical Bessel functions. The numerical error is of the order of the Simpson error term of the function which has to be transformed. Thus one gets a stable integral even at large arguments of the transformed function. (Auth.)

  14. Industrial numerical analysis

    International Nuclear Information System (INIS)

    McKee, S.; Elliott, C.M.


    The applications of mathematics to industrial problems involves the formulation of problems which are amenable to mathematical investigation, mathematical modelling, the solution of the mathematical problem and the inter-pretation of the results. There are 12 chapters describing industrial problems where mathematics and numerical analysis can be applied. These range from the numerical assessment of the flatness of engineering surfaces and plates, the design of chain links, control problems in tidal power generation and low thrust satellite trajectory optimization to mathematical models in welding. One chapter, on the ageing of stainless steels, is indexed separately. (UK)

  15. Numerical analysis using Sage

    CERN Document Server

    Anastassiou, George A


    This is the first numerical analysis text to use Sage for the implementation of algorithms and can be used in a one-semester course for undergraduates in mathematics, math education, computer science/information technology, engineering, and physical sciences. The primary aim of this text is to simplify understanding of the theories and ideas from a numerical analysis/numerical methods course via a modern programming language like Sage. Aside from the presentation of fundamental theoretical notions of numerical analysis throughout the text, each chapter concludes with several exercises that are oriented to real-world application.  Answers may be verified using Sage.  The presented code, written in core components of Sage, are backward compatible, i.e., easily applicable to other software systems such as Mathematica®.  Sage is  open source software and uses Python-like syntax. Previous Python programming experience is not a requirement for the reader, though familiarity with any programming language is a p...

  16. Numerical Estimation in Preschoolers (United States)

    Berteletti, Ilaria; Lucangeli, Daniela; Piazza, Manuela; Dehaene, Stanislas; Zorzi, Marco


    Children's sense of numbers before formal education is thought to rely on an approximate number system based on logarithmically compressed analog magnitudes that increases in resolution throughout childhood. School-age children performing a numerical estimation task have been shown to increasingly rely on a formally appropriate, linear…

  17. Numerical analysis targets

    International Nuclear Information System (INIS)

    Sollogoub, Pierre


    Numerical analyses are needed in different steps of the overall design process. Complex models or non-linear reactor core behaviour are important for qualification and/or comparison of results obtained. Adequate models and test should be defined. Fuel assembly, fuel row, and the complete core should be tested for seismic effects causing LOCA and flow-induced vibrations (FIV)

  18. Development of numerical concepts

    Directory of Open Access Journals (Sweden)

    Sabine Peucker


    Full Text Available The development of numerical concepts is described from infancy to preschool age. Infants a few days old exhibit an early sensitivity for numerosities. In the course of development, nonverbal mental models allow for the exact representation of small quantities as well as changes in these quantities. Subitising, as the accurate recognition of small numerosities (without counting, plays an important role. It can be assumed that numerical concepts and procedures start with insights about small numerosities. Protoquantitative schemata comprise fundamental knowledge about quantities. One-to-one-correspondence connects elements and numbers, and, for this reason, both quantitative and numerical knowledge. If children understand that they can determine the numerosity of a collection of elements by enumerating the elements, they have acquired the concept of cardinality. Protoquantitative knowledge becomes quantitative if it can be applied to numerosities and sequential numbers. The concepts of cardinality and part-part-whole are key to numerical development. Developmentally appropriate learning and teaching should focus on cardinality and part-part-whole concepts.

  19. Analysis of numerical methods

    CERN Document Server

    Isaacson, Eugene


    This excellent text for advanced undergraduates and graduate students covers norms, numerical solution of linear systems and matrix factoring, iterative solutions of nonlinear equations, eigenvalues and eigenvectors, polynomial approximation, and other topics. It offers a careful analysis and stresses techniques for developing new methods, plus many examples and problems. 1966 edition.

  20. Paradoxes in numerical calculations

    Czech Academy of Sciences Publication Activity Database

    Brandts, J.; Křížek, Michal; Zhang, Z.


    Roč. 26, č. 3 (2016), s. 317-330 ISSN 1210-0552 R&D Projects: GA ČR GA14-02067S Institutional support: RVO:67985840 Keywords : round-off errors * numerical instability * recurrence formulae Subject RIV: BA - General Mathematics Impact factor: 0.394, year: 2016

  1. The Navier-Stokes Equations Theory and Numerical Methods

    CERN Document Server

    Masuda, Kyûya; Rautmann, Reimund; Solonnikov, Vsevolod


    These proceedings contain original (refereed) research articles by specialists from many countries, on a wide variety of aspects of Navier-Stokes equations. Additionally, 2 survey articles intended for a general readership are included: one surveys the present state of the subject via open problems, and the other deals with the interplay between theory and numerical analysis.

  2. Numerical model CCC

    International Nuclear Information System (INIS)

    Bodvarsson, G.S.; Lippmann, M.J.


    The computer program CCC (conduction-convection-consolidation), developed at Lawrence Berkeley Laboratory, solves numerically the heat and mass flow equations for a fully saturated medium, and computes one-dimensional consolidation of the simulated systems. The model employs the Integrated Finite Difference Method (IFDM) in discretizing the saturated medium and formulating the governing equations. The sets of equations are solved either by an iterative solution technique (old version) or an efficient sparse solver (new version). The deformation of the medium is calculated using the one-dimensional consolidation theory of Terzaghi. In this paper, the numerical code is described, validation examples given and areas of application discussed. Several example problems involving flow through fractured media are also presented

  3. Numerical ecology with R

    CERN Document Server

    Borcard, Daniel; Legendre, Pierre


    This new edition of Numerical Ecology with R guides readers through an applied exploration of the major methods of multivariate data analysis, as seen through the eyes of three ecologists. It provides a bridge between a textbook of numerical ecology and the implementation of this discipline in the R language. The book begins by examining some exploratory approaches. It proceeds logically with the construction of the key building blocks of most methods, i.e. association measures and matrices, and then submits example data to three families of approaches: clustering, ordination and canonical ordination. The last two chapters make use of these methods to explore important and contemporary issues in ecology: the analysis of spatial structures and of community diversity. The aims of methods thus range from descriptive to explanatory and predictive and encompass a wide variety of approaches that should provide readers with an extensive toolbox that can address a wide palette of questions arising in contemporary mul...

  4. Numerical simulation in astrophysics

    International Nuclear Information System (INIS)

    Miyama, Shoken


    There have been many numerical simulations of hydrodynamical problems in astrophysics, e.g. processes of star formation, supernova explosion and formation of neutron stars, and general relativistic collapse of star to form black hole. The codes are made to be suitable for computing such problems. In astrophysical hydrodynamical problems, there are the characteristics: problems of self-gravity or external gravity acting, objects of scales very large or very short, objects changing by short period or long time scale, problems of magnetic force and/or centrifugal force acting. In this paper, we present one of methods of numerical simulations which may satisfy these requirements, so-called smoothed particle methods. We then introduce the methods briefly. Then, we show one of the applications of the methods to astrophysical problem (fragmentation and collapse of rotating isothermal cloud). (Mori, K.)

  5. Hybrid undulator numerical optimization

    Energy Technology Data Exchange (ETDEWEB)

    Hairetdinov, A.H. [Kurchatov Institute, Moscow (Russian Federation); Zukov, A.A. [Solid State Physics Institute, Chernogolovka (Russian Federation)


    3D properties of the hybrid undulator scheme arc studied numerically using PANDIRA code. It is shown that there exist two well defined sets of undulator parameters which provide either maximum on-axis field amplitude or minimal higher harmonics amplitude of the basic undulator field. Thus the alternative between higher field amplitude or pure sinusoidal field exists. The behavior of the undulator field amplitude and harmonics structure for a large set of (undulator gap)/(undulator wavelength) values is demonstrated.

  6. Comments on numerical simulations

    International Nuclear Information System (INIS)

    Sato, T.


    The author comments on a couple of things about numerical simulation. One is just about the philosophical discussion that is, spontaneous or driven. The other thing is the numerical or technical one. Frankly, the author didn't want to touch on the technical matter because this should be a common sense one for those who are working at numerical simulation. But since many people take numerical simulation results at their face value, he would like to remind you of the reality hidden behind them. First, he would point out that the meaning of ''driven'' in driven reconnection is different from that defined by Schindler or Akasofu. The author's definition is closer to Axford's definition. In the spontaneous case, for some unpredicted reason an excess energy of the system is suddenly released at a certain point. However, one does not answer how such an unstable state far beyond a stable limit is realized in the magnetotail. In the driven case, there is a definite energy buildup phase starting from a stable state; namely, energy in the black box increases from a stable level subject to an external source. When the state has reached a certain position, the energy is released suddenly. The difference between driven and spontaneous is whether the cause (plasma flow) to trigger reconnection is specified or reconnection is triggered unpredictably. Another difference is that in driven reconnection the reconnection rate is dependent on the speed of the external plasma flow, but in spontaneous reconnection the rate is dependent on the internal condition such as the resistivity

  7. Numerical simulation of plasmas

    International Nuclear Information System (INIS)

    Dnestrovskii, Y.N.; Kostomarov, D.P.


    This book contains a modern consistent and systematic presentation of numerical computer simulation of plasmas in controlled thermonuclear fusion. The authors focus on the Soviet research in mathematical modelling of Tokamak plasmas, and present kinetic hydrodynamic and transport models with special emphasis on the more recent hybrid models. Compared with the first edition (in Russian) this book has been greatly revised and updated. (orig./WL)

  8. Numerical analysis II essentials

    CERN Document Server

    REA, The Editors of; Staff of Research Education Association


    REA's Essentials provide quick and easy access to critical information in a variety of different fields, ranging from the most basic to the most advanced. As its name implies, these concise, comprehensive study guides summarize the essentials of the field covered. Essentials are helpful when preparing for exams, doing homework and will remain a lasting reference source for students, teachers, and professionals. Numerical Analysis II covers simultaneous linear systems and matrix methods, differential equations, Fourier transformations, partial differential equations, and Monte Carlo methods.

  9. Handbook of numerical analysis

    CERN Document Server

    Ciarlet, Philippe G

    Mathematical finance is a prolific scientific domain in which there exists a particular characteristic of developing both advanced theories and practical techniques simultaneously. Mathematical Modelling and Numerical Methods in Finance addresses the three most important aspects in the field: mathematical models, computational methods, and applications, and provides a solid overview of major new ideas and results in the three domains. Coverage of all aspects of quantitative finance including models, computational methods and applications Provides an overview of new ideas an

  10. Numerical Analysis Objects (United States)

    Henderson, Michael


    The Numerical Analysis Objects project (NAO) is a project in the Mathematics Department of IBM's TJ Watson Research Center. While there are plenty of numerical tools available today, it is not an easy task to combine them into a custom application. NAO is directed at the dual problems of building applications from a set of tools, and creating those tools. There are several "reuse" projects, which focus on the problems of identifying and cataloging tools. NAO is directed at the specific context of scientific computing. Because the type of tools is restricted, problems such as tools with incompatible data structures for input and output, and dissimilar interfaces to tools which solve similar problems can be addressed. The approach we've taken is to define interfaces to those objects used in numerical analysis, such as geometries, functions and operators, and to start collecting (and building) a set of tools which use these interfaces. We have written a class library (a set of abstract classes and implementations) in C++ which demonstrates the approach. Besides the classes, the class library includes "stub" routines which allow the library to be used from C or Fortran, and an interface to a Visual Programming Language. The library has been used to build a simulator for petroleum reservoirs, using a set of tools for discretizing nonlinear differential equations that we have written, and includes "wrapped" versions of packages from the Netlib repository. Documentation can be found on the Web at "". I will describe the objects and their interfaces, and give examples ranging from mesh generation to solving differential equations.

  11. Numerical differential protection

    CERN Document Server

    Ziegler, Gerhard


    Differential protection is a fast and selective method of protection against short-circuits. It is applied in many variants for electrical machines, trans?formers, busbars, and electric lines.Initially this book covers the theory and fundamentals of analog and numerical differential protection. Current transformers are treated in detail including transient behaviour, impact on protection performance, and practical dimensioning. An extended chapter is dedicated to signal transmission for line protection, in particular, modern digital communication and GPS timing.The emphasis is then pla

  12. Confidence in Numerical Simulations

    Energy Technology Data Exchange (ETDEWEB)

    Hemez, Francois M. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)


    This PowerPoint presentation offers a high-level discussion of uncertainty, confidence and credibility in scientific Modeling and Simulation (M&S). It begins by briefly evoking M&S trends in computational physics and engineering. The first thrust of the discussion is to emphasize that the role of M&S in decision-making is either to support reasoning by similarity or to “forecast,” that is, make predictions about the future or extrapolate to settings or environments that cannot be tested experimentally. The second thrust is to explain that M&S-aided decision-making is an exercise in uncertainty management. The three broad classes of uncertainty in computational physics and engineering are variability and randomness, numerical uncertainty and model-form uncertainty. The last part of the discussion addresses how scientists “think.” This thought process parallels the scientific method where by a hypothesis is formulated, often accompanied by simplifying assumptions, then, physical experiments and numerical simulations are performed to confirm or reject the hypothesis. “Confidence” derives, not just from the levels of training and experience of analysts, but also from the rigor with which these assessments are performed, documented and peer-reviewed.

  13. Confidence in Numerical Simulations

    International Nuclear Information System (INIS)

    Hemez, Francois M.


    This PowerPoint presentation offers a high-level discussion of uncertainty, confidence and credibility in scientific Modeling and Simulation (M&S). It begins by briefly evoking M&S trends in computational physics and engineering. The first thrust of the discussion is to emphasize that the role of M&S in decision-making is either to support reasoning by similarity or to ''forecast,'' that is, make predictions about the future or extrapolate to settings or environments that cannot be tested experimentally. The second thrust is to explain that M&S-aided decision-making is an exercise in uncertainty management. The three broad classes of uncertainty in computational physics and engineering are variability and randomness, numerical uncertainty and model-form uncertainty. The last part of the discussion addresses how scientists ''think.'' This thought process parallels the scientific method where by a hypothesis is formulated, often accompanied by simplifying assumptions, then, physical experiments and numerical simulations are performed to confirm or reject the hypothesis. ''Confidence'' derives, not just from the levels of training and experience of analysts, but also from the rigor with which these assessments are performed, documented and peer-reviewed.

  14. Methods for enhancing numerical integration

    International Nuclear Information System (INIS)

    Doncker, Elise de


    We give a survey of common strategies for numerical integration (adaptive, Monte-Carlo, Quasi-Monte Carlo), and attempt to delineate their realm of applicability. The inherent accuracy and error bounds for basic integration methods are given via such measures as the degree of precision of cubature rules, the index of a family of lattice rules, and the discrepancy of uniformly distributed point sets. Strategies incorporating these basic methods often use paradigms to reduce the error by, e.g., increasing the number of points in the domain or decreasing the mesh size, locally or uniformly. For these processes the order of convergence of the strategy is determined by the asymptotic behavior of the error, and may be too slow in practice for the type of problem at hand. For certain problem classes we may be able to improve the effectiveness of the method or strategy by such techniques as transformations, absorbing a difficult part of the integrand into a weight function, suitable partitioning of the domain, transformations and extrapolation or convergence acceleration. Situations warranting the use of these techniques (possibly in an 'automated' way) are described and illustrated by sample applications

  15. Survey of the numerical characterisation of 2-D complex clusters

    NARCIS (Netherlands)

    Maggi, F.


    The study of cluster format ion is common in many fields of science and technology (aerosols, colloidal suspensions, hetero-disperse particulate systems in general, growth processes far from equilibrium, etc.). The term "cluster" is a general word indicating an object consisting of a set of

  16. Essential numerical computer methods

    CERN Document Server

    Johnson, Michael L


    The use of computers and computational methods has become ubiquitous in biological and biomedical research. During the last 2 decades most basic algorithms have not changed, but what has is the huge increase in computer speed and ease of use, along with the corresponding orders of magnitude decrease in cost. A general perception exists that the only applications of computers and computer methods in biological and biomedical research are either basic statistical analysis or the searching of DNA sequence data bases. While these are important applications they only scratch the surface of the current and potential applications of computers and computer methods in biomedical research. The various chapters within this volume include a wide variety of applications that extend far beyond this limited perception. As part of the Reliable Lab Solutions series, Essential Numerical Computer Methods brings together chapters from volumes 210, 240, 321, 383, 384, 454, and 467 of Methods in Enzymology. These chapters provide ...

  17. Numerical relativity beyond astrophysics (United States)

    Garfinkle, David


    Though the main applications of computer simulations in relativity are to astrophysical systems such as black holes and neutron stars, nonetheless there are important applications of numerical methods to the investigation of general relativity as a fundamental theory of the nature of space and time. This paper gives an overview of some of these applications. In particular we cover (i) investigations of the properties of spacetime singularities such as those that occur in the interior of black holes and in big bang cosmology. (ii) investigations of critical behavior at the threshold of black hole formation in gravitational collapse. (iii) investigations inspired by string theory, in particular analogs of black holes in more than 4 spacetime dimensions and gravitational collapse in spacetimes with a negative cosmological constant.

  18. Testability of numerical systems

    International Nuclear Information System (INIS)

    Soulas, B.


    In order to face up to the growing complexity of systems, the authors undertook to define a new approach for the qualification of systems. This approach is based on the concept of Testability which, supported by system modelization, validation and verification methods and tools, would allow Integrated Qualification process, applied throughout the life-span of systems. The general principles of this approach are introduced in the general case of numerical systems; in particular, this presentation points out the difference between the specification activity and the modelization and validation activity. This approach is illustrated firstly by the study of a global system and then by case of communication protocol as the software point of view. Finally MODEL which support this approach is described. MODEL tool is a commercial tool providing modelization and validation techniques based on Petri Nets with triple extension: Predicate/Transition, Timed and Stochastic Petri Nets

  19. Numerical relativity beyond astrophysics. (United States)

    Garfinkle, David


    Though the main applications of computer simulations in relativity are to astrophysical systems such as black holes and neutron stars, nonetheless there are important applications of numerical methods to the investigation of general relativity as a fundamental theory of the nature of space and time. This paper gives an overview of some of these applications. In particular we cover (i) investigations of the properties of spacetime singularities such as those that occur in the interior of black holes and in big bang cosmology. (ii) investigations of critical behavior at the threshold of black hole formation in gravitational collapse. (iii) investigations inspired by string theory, in particular analogs of black holes in more than 4 spacetime dimensions and gravitational collapse in spacetimes with a negative cosmological constant.

  20. Computing the Alexander Polynomial Numerically

    DEFF Research Database (Denmark)

    Hansen, Mikael Sonne


    Explains how to construct the Alexander Matrix and how this can be used to compute the Alexander polynomial numerically.......Explains how to construct the Alexander Matrix and how this can be used to compute the Alexander polynomial numerically....

  1. "Suntelligence" Survey (United States)

    ... to the American Academy of Dermatology's "Suntelligence" sun-smart survey. Please answer the following questions to measure ... be able to view a ranking of major cities suntelligence based on residents' responses to this survey. ...

  2. Numerical model SMODERP (United States)

    Kavka, P.; Jeřábek, J.; Strouhal, L.


    The contribution presents a numerical model SMODERP that is used for calculation and prediction of surface runoff and soil erosion from agricultural land. The physically based model includes the processes of infiltration (Phillips equation), surface runoff routing (kinematic wave based equation), surface retention, surface roughness and vegetation impact on runoff. The model is being developed at the Department of Irrigation, Drainage and Landscape Engineering, Civil Engineering Faculty, CTU in Prague. 2D version of the model was introduced in last years. The script uses ArcGIS system tools for data preparation. The physical relations are implemented through Python scripts. The main computing part is stand alone in numpy arrays. Flow direction is calculated by Steepest Descent algorithm and in multiple flow algorithm. Sheet flow is described by modified kinematic wave equation. Parameters for five different soil textures were calibrated on the set of hundred measurements performed on the laboratory and filed rainfall simulators. Spatially distributed models enable to estimate not only surface runoff but also flow in the rills. Development of the rills is based on critical shear stress and critical velocity. For modelling of the rills a specific sub model was created. This sub model uses Manning formula for flow estimation. Flow in the ditches and streams are also computed. Numerical stability of the model is controled by Courant criterion. Spatial scale is fixed. Time step is dynamic and depends on the actual discharge. The model is used in the framework of the project "Variability of Short-term Precipitation and Runoff in Small Czech Drainage Basins and its Influence on Water Resources Management". Main goal of the project is to elaborate a methodology and online utility for deriving short-term design precipitation series, which could be utilized by a broad community of scientists, state administration as well as design planners. The methodology will account for

  3. Numerical aerodynamic simulation (NAS)

    International Nuclear Information System (INIS)

    Peterson, V.L.; Ballhaus, W.F. Jr.; Bailey, F.R.


    The Numerical Aerodynamic Simulation (NAS) Program is designed to provide a leading-edge computational capability to the aerospace community. It was recognized early in the program that, in addition to more advanced computers, the entire computational process ranging from problem formulation to publication of results needed to be improved to realize the full impact of computational aerodynamics. Therefore, the NAS Program has been structured to focus on the development of a complete system that can be upgraded periodically with minimum impact on the user and on the inventory of applications software. The implementation phase of the program is now under way. It is based upon nearly 8 yr of study and should culminate in an initial operational capability before 1986. The objective of this paper is fivefold: 1) to discuss the factors motivating the NAS program, 2) to provide a history of the activity, 3) to describe each of the elements of the processing-system network, 4) to outline the proposed allocation of time to users of the facility, and 5) to describe some of the candidate problems being considered for the first benchmark codes

  4. Recent advances in two-phase flow numerics

    International Nuclear Information System (INIS)

    Mahaffy, J.H.; Macian, R.


    The authors review three topics in the broad field of numerical methods that may be of interest to individuals modeling two-phase flow in nuclear power plants. The first topic is iterative solution of linear equations created during the solution of finite volume equations. The second is numerical tracking of macroscopic liquid interfaces. The final area surveyed is the use of higher spatial difference techniques

  5. Recent advances in two-phase flow numerics

    Energy Technology Data Exchange (ETDEWEB)

    Mahaffy, J.H.; Macian, R. [Pennsylvania State Univ., University Park, PA (United States)


    The authors review three topics in the broad field of numerical methods that may be of interest to individuals modeling two-phase flow in nuclear power plants. The first topic is iterative solution of linear equations created during the solution of finite volume equations. The second is numerical tracking of macroscopic liquid interfaces. The final area surveyed is the use of higher spatial difference techniques.

  6. Indexing contamination surveys

    International Nuclear Information System (INIS)

    Brown, R.L.


    The responsibility for safely managing the Tank Farms at Hanford belongs to Lockheed Martin Hanford Corporation which is part of the six company Project Hanford Management Team led by Fluor Daniel Hanford, Inc.. These Tank Farm Facilities contain numerous outdoor contamination areas which are surveyed at a periodicity consistent with the potential radiological conditions, occupancy, and risk of changes in radiological conditions. This document describes the survey documentation and data tracking method devised to track the results of contamination surveys this process is referred to as indexing. The indexing process takes a representative data set as an indicator for the contamination status of the facility. The data are further manipulated into a single value that can be tracked and trended using standard statistical methodology. To report meaningful data, the routine contamination surveys must be performed in a manner that allows the survey method and the data collection process to be recreated. Three key criteria are necessary to accomplish this goal: Accurate maps, consistent documentation, and consistent consolidation of data meeting these criteria provides data of sufficient quality to be tracked. Tracking of survey data is accomplished by converting the individual survey results into a weighted value, corrected for the actual number of survey points. This information can be compared over time using standard statistical analysis to identify trends. At the Tank Farms, the need to track and trend the facility's radiological status presents unique challenges. Many of these Tank Farm facilities date back to the second world war. The Tank Farm Facilities are exposed to weather extremes, plant and animal intrusion, as well as all of the normal challenges associated with handling radiological waste streams. Routine radiological surveys did not provide a radiological status adequate for continuing comparisons

  7. Survey and Restoration (United States)

    Mileto, C.; Vegas, F.


    In addition to the technological evolution over the last two centuries, survey has experienced two main conceptual leaps: the introduction of photography as a tool for an indiscriminate register for reality, and the shift from autographic to allographic survey, phenomena which can generate a distancing effect within the restoration process. Besides, this text presents the relationship between survey in its numerous forms and technologies (manual and semi-manual to more complex ones like scanner-laser) and the restoration of the building, either for establishing a diagnosis, operating or valorizating, illustrating it with examples developed by the authors, as well as the criteria to be applied when documenting a building to be restored, irrespective of the means and technology available in each case.


    Directory of Open Access Journals (Sweden)

    C. Mileto


    Full Text Available In addition to the technological evolution over the last two centuries, survey has experienced two main conceptual leaps: the introduction of photography as a tool for an indiscriminate register for reality, and the shift from autographic to allographic survey, phenomena which can generate a distancing effect within the restoration process. Besides, this text presents the relationship between survey in its numerous forms and technologies (manual and semi-manual to more complex ones like scanner-laser and the restoration of the building, either for establishing a diagnosis, operating or valorizating, illustrating it with examples developed by the authors, as well as the criteria to be applied when documenting a building to be restored, irrespective of the means and technology available in each case.

  9. Introduction to precise numerical methods

    CERN Document Server

    Aberth, Oliver


    Precise numerical analysis may be defined as the study of computer methods for solving mathematical problems either exactly or to prescribed accuracy. This book explains how precise numerical analysis is constructed. The book also provides exercises which illustrate points from the text and references for the methods presented. All disc-based content for this title is now available on the Web. · Clearer, simpler descriptions and explanations ofthe various numerical methods· Two new types of numerical problems; accurately solving partial differential equations with the included software and computing line integrals in the complex plane.

  10. Representation of Numerical and Non-Numerical Order in Children (United States)

    Berteletti, Ilaria; Lucangeli, Daniela; Zorzi, Marco


    The representation of numerical and non-numerical ordered sequences was investigated in children from preschool to grade 3. The child's conception of how sequence items map onto a spatial scale was tested using the Number-to-Position task (Siegler & Opfer, 2003) and new variants of the task designed to probe the representation of the alphabet…

  11. Survey research. (United States)

    Alderman, Amy K; Salem, Barbara


    Survey research is a unique methodology that can provide insight into individuals' perspectives and experiences and can be collected on a large population-based sample. Specifically, in plastic surgery, survey research can provide patients and providers with accurate and reproducible information to assist with medical decision-making. When using survey methods in research, researchers should develop a conceptual model that explains the relationships of the independent and dependent variables. The items of the survey are of primary importance. Collected data are only useful if they accurately measure the concepts of interest. In addition, administration of the survey must follow basic principles to ensure an adequate response rate and representation of the intended target sample. In this article, the authors review some general concepts important for successful survey research and discuss the many advantages this methodology has for obtaining limitless amounts of valuable information.

  12. Numerical Asymptotic Solutions Of Differential Equations (United States)

    Thurston, Gaylen A.


    Numerical algorithms derived and compared with classical analytical methods. In method, expansions replaced with integrals evaluated numerically. Resulting numerical solutions retain linear independence, main advantage of asymptotic solutions.

  13. Potential Theory Surveys and Problems

    CERN Document Server

    Lukeš, Jaroslav; Netuka, Ivan; Veselý, Jiří


    The volume comprises eleven survey papers based on survey lectures delivered at the Conference in Prague in July 1987, which covered various facets of potential theory, including its applications in other areas. The survey papers deal with both classical and abstract potential theory and its relations to partial differential equations, stochastic processes and other branches such as numerical analysis and topology. A collection of problems from potential theory, compiled on the occasion of the conference, is included, with additional commentaries, in the second part of this volume.

  14. How to Circumvent Church Numerals

    DEFF Research Database (Denmark)

    Goldberg, Mayer; Torgersen, Mads


    In this work we consider a standard numeral system in the lambda-calculus, and the elementary arithmetic and Boolean functions and predicates defined on this numeral system, and show how to construct terms that "circumvent" or "defeat" these functions: The equality predicate is satisfied when com...

  15. Numerical Gram-Schmidt orthonormalization

    International Nuclear Information System (INIS)

    Werneth, Charles M; Dhar, Mallika; Maung, Khin Maung; Sirola, Christopher; Norbury, John W


    A numerical Gram-Schmidt orthonormalization procedure is presented for constructing an orthonormal basis function set from a non-orthonormal set, when the number of basis functions is large. This method will provide a pedagogical illustration of the Gram-Schmidt procedure and can be presented in classes on numerical methods or computational physics.

  16. Numerical simulation of laser resonators

    International Nuclear Information System (INIS)

    Yoo, J. G.; Jeong, Y. U.; Lee, B. C.; Rhee, Y. J.; Cho, S. O.


    We developed numerical simulation packages for laser resonators on the bases of a pair of integral equations. Two numerical schemes, a matrix formalism and an iterative method, were programmed for finding numeric solutions to the pair of integral equations. The iterative method was tried by Fox and Li, but it was not applicable for high Fresnel numbers since the numerical errors involved propagate and accumulate uncontrollably. In this paper, we implement the matrix method to extend the computational limit further. A great number of case studies are carried out with various configurations of stable and unstable r;esonators to compute diffraction losses, phase shifts, intensity distributions and phases of the radiation fields on mirrors. Our results presented in this paper show not only a good agreement with the results previously obtained by Fox and Li, but also the legitimacy of our numerical procedures for high Fresnel numbers.

  17. Surveys & Programs (United States)

    Employment and Payroll Survey of Business Owners Work from Home Our statistics highlight trends in household statistics from multiple surveys. Data Tools & Apps Main American FactFinder Census Business Builder My residential construction. Business Dynamics Statistics (BDS) Provides measures of openings and closings, job

  18. Engineering surveying

    CERN Document Server

    Schofield, W


    The aim of Engineering Surveying has always been to impart and develop a clear understanding of the basic topics of the subject. The author has fully revised the book to make it the most up-to-date and relevant textbook available on the subject.The book also contains the latest information on trigonometric levelling, total stations and one-person measuring systems. A new chapter on satellites ensures a firm grasp of this vitally important topic.The text covers engineering surveying modules for civil engineering students on degree courses and forms a reference for the engineering surveying module in land surveying courses. It will also prove to be a valuable reference for practitioners.* Simple clear introduction to surveying for engineers* Explains key techniques and methods* Details reading systems and satellite position fixing

  19. Redshift Survey Strategies (United States)

    Jones, A. W.; Bland-Hawthorn, J.; Kaiser, N.


    In the first half of 1995, the Anglo-Australian Observatory is due to commission a wide field (2.1(deg) ), 400-fiber, double spectrograph system (2dF) at the f/3.3 prime focus of the AAT 3.9m bi-national facility. The instrument should be able to measure ~ 4000 galaxy redshifts (assuming a magnitude limit of b_J ~\\ 20) in a single dark night and is therefore ideally suited to studies of large-scale structure. We have carried out simple 3D numerical simulations to judge the relative merits of sparse surveys and contiguous surveys. We generate a survey volume and fill it randomly with particles according to a selection function which mimics a magnitude-limited survey at b_J = 19.7. Each of the particles is perturbed by a gaussian random field according to the dimensionless power spectrum k(3) P(k) / 2pi (2) determined by Feldman, Kaiser & Peacock (1994) from the IRAS QDOT survey. We introduce some redshift-space distortion as described by Kaiser (1987), a `thermal' component measured from pairwise velocities (Davis & Peebles 1983), and `fingers of god' due to rich clusters at random density enhancements. Our particular concern is to understand how the window function W(2(k)) of the survey geometry compromises the accuracy of statistical measures [e.g., P(k), xi (r), xi (r_sigma ,r_pi )] commonly used in the study of large-scale structure. We also examine the reliability of various tools (e.g. genus) for describing the topological structure within a contiguous region of the survey.

  20. Survey Data (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Cleaned and QCd data for the Fishing Effort Survey. Questions on fishing and other out are asked on weather and outdoor activity, including fishing trips. Used for...

  1. Surveying Humaness

    DEFF Research Database (Denmark)

    Markussen, Randi; Gad, Christopher

    carried out in a Danish county in order to improve treatment of people who have suffered from long-term illnesses. The surveys concern not only feed back on how people experience their present and past interaction with the social services and health care system; they also ask people to indicate the state......Christopher Gad. Ph.d. Dept. of Information and Media Studies Randi Markussen. Associate Professor, Dept. of Information and Media Studies.   Abstract:   Surveying humanness -politics of care improvement   For various reasons we both were subjected to a specific survey procedure...... and development of a large collection of biological and psychological symptoms and psycho-social problems. However, the surveys say nothing about how the information will be of use to the people who answer the procedure or how this scientific intervention will be put to use more specifically within the public...

  2. Numerical Verification Of Equilibrium Chemistry

    International Nuclear Information System (INIS)

    Piro, Markus; Lewis, Brent; Thompson, William T.; Simunovic, Srdjan; Besmann, Theodore M.


    A numerical tool is in an advanced state of development to compute the equilibrium compositions of phases and their proportions in multi-component systems of importance to the nuclear industry. The resulting software is being conceived for direct integration into large multi-physics fuel performance codes, particularly for providing boundary conditions in heat and mass transport modules. However, any numerical errors produced in equilibrium chemistry computations will be propagated in subsequent heat and mass transport calculations, thus falsely predicting nuclear fuel behaviour. The necessity for a reliable method to numerically verify chemical equilibrium computations is emphasized by the requirement to handle the very large number of elements necessary to capture the entire fission product inventory. A simple, reliable and comprehensive numerical verification method is presented which can be invoked by any equilibrium chemistry solver for quality assurance purposes.

  3. BCJ numerators from reduced Pfaffian

    Energy Technology Data Exchange (ETDEWEB)

    Du, Yi-Jian [Center for Theoretical Physics, School of Physics and Technology, Wuhan University,No. 299 Bayi Road, Wuhan 430072 (China); Teng, Fei [Department of Physics and Astronomy, University of Utah,115 South 1400 East, Salt Lake City, UT 84112 (United States)


    By expanding the reduced Pfaffian in the tree level Cachazo-He-Yuan (CHY) integrands for Yang-Mills (YM) and nonlinear sigma model (NLSM), we can get the Bern-Carrasco-Johansson (BCJ) numerators in Del Duca-Dixon-Maltoni (DDM) form for arbitrary number of particles in any spacetime dimensions. In this work, we give a set of very straightforward graphic rules based on spanning trees for a direct evaluation of the BCJ numerators for YM and NLSM. Such rules can be derived from the Laplace expansion of the corresponding reduced Pfaffian. For YM, the each one of the (n−2)! DDM form BCJ numerators contains exactly (n−1)! terms, corresponding to the increasing trees with respect to the color order. For NLSM, the number of nonzero numerators is at most (n−2)!−(n−3)!, less than those of several previous constructions.

  4. Numerical Analysis of Multiscale Computations

    CERN Document Server

    Engquist, Björn; Tsai, Yen-Hsi R


    This book is a snapshot of current research in multiscale modeling, computations and applications. It covers fundamental mathematical theory, numerical algorithms as well as practical computational advice for analysing single and multiphysics models containing a variety of scales in time and space. Complex fluids, porous media flow and oscillatory dynamical systems are treated in some extra depth, as well as tools like analytical and numerical homogenization, and fast multipole method.

  5. Numerical calculations near spatial infinity

    International Nuclear Information System (INIS)

    Zenginoglu, Anil


    After describing in short some problems and methods regarding the smoothness of null infinity for isolated systems, I present numerical calculations in which both spatial and null infinity can be studied. The reduced conformal field equations based on the conformal Gauss gauge allow us in spherical symmetry to calculate numerically the entire Schwarzschild-Kruskal spacetime in a smooth way including spacelike, null and timelike infinity and the domain close to the singularity

  6. Numerical modelling of mine workings.

    CSIR Research Space (South Africa)

    Lightfoot, N


    Full Text Available to cover most of what is required for a practising rock mechanics engineer to be able to use any of these five programs to solve practical mining problems. The chapters on specific programs discuss their individual strengths and weaknesses and highlight... and applications of numerical modelling in the context of the South African gold and platinum mining industries. This includes an example that utilises a number of different numerical 3 modelling programs to solve a single problem. This particular example...

  7. On joint numerical radius II

    Czech Academy of Sciences Publication Activity Database

    Drnovšek, R.; Müller, Vladimír


    Roč. 62, č. 9 (2014), s. 1197-1204 ISSN 0308-1087 R&D Projects: GA ČR GA201/09/0473; GA AV ČR IAA100190903 Institutional support: RVO:67985840 Keywords : joint numerical range * numerical radius Subject RIV: BA - General Mathematics Impact factor: 0.738, year: 2014

  8. Numerical Hydrodynamics in General Relativity

    Directory of Open Access Journals (Sweden)

    Font José A.


    Full Text Available The current status of numerical solutions for the equations of ideal general relativistic hydrodynamics is reviewed. With respect to an earlier version of the article, the present update provides additional information on numerical schemes, and extends the discussion of astrophysical simulations in general relativistic hydrodynamics. Different formulations of the equations are presented, with special mention of conservative and hyperbolic formulations well-adapted to advanced numerical methods. A large sample of available numerical schemes is discussed, paying particular attention to solution procedures based on schemes exploiting the characteristic structure of the equations through linearized Riemann solvers. A comprehensive summary of astrophysical simulations in strong gravitational fields is presented. These include gravitational collapse, accretion onto black holes, and hydrodynamical evolutions of neutron stars. The material contained in these sections highlights the numerical challenges of various representative simulations. It also follows, to some extent, the chronological development of the field, concerning advances on the formulation of the gravitational field and hydrodynamic equations and the numerical methodology designed to solve them.

  9. 76 FR 40916 - Proposed Data Collections Submitted for Public Comment and Recommendations (United States)


    ... compliance efforts. These individuals will include hospital administrators, security directors and/or risk..., written violence prevention plan, violence risk assessments, post incident response and violence.... Third, we will conduct a nurse survey. The survey will describe the workplace violence prevention...

  10. 76 FR 64351 - Agency Forms Undergoing Paperwork Reduction Act Review (United States)


    ... hospital administrators, security directors and/or risk managers, many of whom participated in the... events, violence prevention committee, written violence prevention plan, violence risk assessments, post... enactment of the regulations. Third, we will conduct a nurse survey. The survey will describe the workplace...

  11. Numerical simulation of human biped locomotion

    International Nuclear Information System (INIS)

    Ishiguro, Misako; Fujisaki, Masahide


    This report describes the numerical simulation of the motion of human-like robot which is one of the research theme of human acts simulation program (HASP) begun at the Computing Center of JAERI in 1987. The purpose of the theme is to model the human motion using robotics kinematic/kinetic equations and to get the joint angles as the solution. As the first trial, we treat the biped locomotion (walking) which is the most fundamental human motion. We implemented a computer program on FACOM M-780 computer, where the program is originated from the book of M. Vukobratovic in Yugoslavia, and made a graphic program to draw a walking shot sequence. Mainly described here are the mathematical model of the biped locomotion, implementation method of the computer program, input data for basic walking pattern, computed results and its validation, and graphic representation of human walking image. Literature survey on robotics equation and biped locomotion is also included. (author)

  12. Numerical Methods for Free Boundary Problems

    CERN Document Server


    About 80 participants from 16 countries attended the Conference on Numerical Methods for Free Boundary Problems, held at the University of Jyviiskylii, Finland, July 23-27, 1990. The main purpose of this conference was to provide up-to-date information on important directions of research in the field of free boundary problems and their numerical solutions. The contributions contained in this volume cover the lectures given in the conference. The invited lectures were given by H.W. Alt, V. Barbu, K-H. Hoffmann, H. Mittelmann and V. Rivkind. In his lecture H.W. Alt considered a mathematical model and existence theory for non-isothermal phase separations in binary systems. The lecture of V. Barbu was on the approximate solvability of the inverse one phase Stefan problem. K-H. Hoff­ mann gave an up-to-date survey of several directions in free boundary problems and listed several applications, but the material of his lecture is not included in this proceedings. H.D. Mittelmann handled the stability of thermo capi...

  13. Engineering surveying

    CERN Document Server

    Schofield, W


    Engineering surveying involves determining the position of natural and man-made features on or beneath the Earth's surface and utilizing these features in the planning, design and construction of works. It is a critical part of any engineering project. Without an accurate understanding of the size, shape and nature of the site the project risks expensive and time-consuming errors or even catastrophic failure.Engineering Surveying 6th edition covers all the basic principles and practice of this complex subject and the authors bring expertise and clarity. Previous editions of this classic text have given readers a clear understanding of fundamentals such as vertical control, distance, angles and position right through to the most modern technologies, and this fully updated edition continues that tradition.This sixth edition includes:* An introduction to geodesy to facilitate greater understanding of satellite systems* A fully updated chapter on GPS, GLONASS and GALILEO for satellite positioning in surveying* Al...

  14. Aerogeophysical survey in Olkiluoto 2009

    International Nuclear Information System (INIS)

    Kurimo, M.


    exported to numeric XYZ files and interpolated into grid data file. A noteworthy local detail present in the survey and in the processing was the massive power line. For safety reasons, flight altitude had to be increased and survey lines had to be cut short in the vicinity of the power line. However, due to reasonable planning of the survey area boundaries, this caused no remarkable disturbance to the end result. (orig.)

  15. Surveying Education

    DEFF Research Database (Denmark)

    Enemark, Stig


    In relation to surveying education there is one big question to be asked: Is the role of the surveyors changing? In a global perspective the answer will be "Yes". There is a big swing that could be entitled "From Measurement to Management". This does not imply that measurement is no longer....... In surveying education there are a range of other challenges to be faced. These relate to the focus on learning to learn; the need for flexible curriculum to deal with constant change; the move towards introducing virtual academy; the demand for creating a quality culture; and the perspective of lifelong...... on an efficient interaction between education, research, and professional practice....

  16. Numerical methods in multibody dynamics

    CERN Document Server

    Eich-Soellner, Edda


    Today computers play an important role in the development of complex mechanical systems, such as cars, railway vehicles or machines. Efficient simulation of these systems is only possible when based on methods that explore the strong link between numerics and computational mechanics. This book gives insight into modern techniques of numerical mathematics in the light of an interesting field of applications: multibody dynamics. The important interaction between modeling and solution techniques is demonstrated by using a simplified multibody model of a truck. Different versions of this mechanical model illustrate all key concepts in static and dynamic analysis as well as in parameter identification. The book focuses in particular on constrained mechanical systems. Their formulation in terms of differential-algebraic equations is the backbone of nearly all chapters. The book is written for students and teachers in numerical analysis and mechanical engineering as well as for engineers in industrial research labor...

  17. Extensible numerical library in JAVA

    International Nuclear Information System (INIS)

    Aso, T.; Okazawa, H.; Takashimizu, N.


    The authors present the current status of the project for developing the numerical library in JAVA. The authors have presented how object-oriented techniques improve usage and also development of numerical libraries compared with the conventional way at previous conference. The authors need many functions for data analysis which is not provided within JAVA language, for example, good random number generators, special functions and so on. Authors' development strategy is focused on easiness of implementation and adding new features by users themselves not only by developers. In HPC field, there are other focus efforts to develop numerical libraries in JAVA. However, their focus is on the performance of execution, not easiness of extension. Following the strategy, the authors have designed and implemented more classes for random number generators and so on

  18. Numerical analysis of electromagnetic fields

    CERN Document Server

    Zhou Pei Bai


    Numerical methods for solving boundary value problems have developed rapidly. Knowledge of these methods is important both for engineers and scientists. There are many books published that deal with various approximate methods such as the finite element method, the boundary element method and so on. However, there is no textbook that includes all of these methods. This book is intended to fill this gap. The book is designed to be suitable for graduate students in engineering science, for senior undergraduate students as well as for scientists and engineers who are interested in electromagnetic fields. Objective Numerical calculation is the combination of mathematical methods and field theory. A great number of mathematical concepts, principles and techniques are discussed and many computational techniques are considered in dealing with practical problems. The purpose of this book is to provide students with a solid background in numerical analysis of the field problems. The book emphasizes the basic theories ...

  19. Numerical models for differential problems

    CERN Document Server

    Quarteroni, Alfio


    In this text, we introduce the basic concepts for the numerical modelling of partial differential equations. We consider the classical elliptic, parabolic and hyperbolic linear equations, but also the diffusion, transport, and Navier-Stokes equations, as well as equations representing conservation laws, saddle-point problems and optimal control problems. Furthermore, we provide numerous physical examples which underline such equations. We then analyze numerical solution methods based on finite elements, finite differences, finite volumes, spectral methods and domain decomposition methods, and reduced basis methods. In particular, we discuss the algorithmic and computer implementation aspects and provide a number of easy-to-use programs. The text does not require any previous advanced mathematical knowledge of partial differential equations: the absolutely essential concepts are reported in a preliminary chapter. It is therefore suitable for students of bachelor and master courses in scientific disciplines, an...

  20. Numerical simulation of flood barriers (United States)

    Srb, Pavel; Petrů, Michal; Kulhavý, Petr

    This paper deals with testing and numerical simulating of flood barriers. The Czech Republic has been hit by several very devastating floods in past years. These floods caused several dozens of causalities and property damage reached billions of Euros. The development of flood measures is very important, especially for the reduction the number of casualties and the amount of property damage. The aim of flood control measures is the detention of water outside populated areas and drainage of water from populated areas as soon as possible. For new flood barrier design it is very important to know its behaviour in case of a real flood. During the development of the barrier several standardized tests have to be carried out. Based on the results from these tests numerical simulation was compiled using Abaqus software and some analyses were carried out. Based on these numerical simulations it will be possible to predict the behaviour of barriers and thus improve their design.

  1. Numeral Incorporation in Japanese Sign Language (United States)

    Ktejik, Mish


    This article explores the morphological process of numeral incorporation in Japanese Sign Language. Numeral incorporation is defined and the available research on numeral incorporation in signed language is discussed. The numeral signs in Japanese Sign Language are then introduced and followed by an explanation of the numeral morphemes which are…

  2. Numerical precision control and GRACE

    International Nuclear Information System (INIS)

    Fujimoto, J.; Hamaguchi, N.; Ishikawa, T.; Kaneko, T.; Morita, H.; Perret-Gallix, D.; Tokura, A.; Shimizu, Y.


    The control of the numerical precision of large-scale computations like those generated by the GRACE system for automatic Feynman diagram calculations has become an intrinsic part of those packages. Recently, Hitachi Ltd. has developed in FORTRAN a new library HMLIB for quadruple and octuple precision arithmetic where the number of lost-bits is made available. This library has been tested with success on the 1-loop radiative correction to e + e - ->e + e - τ + τ - . It is shown that the approach followed by HMLIB provides an efficient way to track down the source of numerical significance losses and to deliver high-precision results yet minimizing computing time

  3. Matlab programming for numerical analysis

    CERN Document Server

    Lopez, Cesar


    MATLAB is a high-level language and environment for numerical computation, visualization, and programming. Using MATLAB, you can analyze data, develop algorithms, and create models and applications. The language, tools, and built-in math functions enable you to explore multiple approaches and reach a solution faster than with spreadsheets or traditional programming languages, such as C/C++ or Java. Programming MATLAB for Numerical Analysis introduces you to the MATLAB language with practical hands-on instructions and results, allowing you to quickly achieve your goals. You will first become

  4. Numeric invariants from multidimensional persistence

    Energy Technology Data Exchange (ETDEWEB)

    Skryzalin, Jacek [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Carlsson, Gunnar [Stanford Univ., Stanford, CA (United States)


    In this paper, we analyze the space of multidimensional persistence modules from the perspectives of algebraic geometry. We first build a moduli space of a certain subclass of easily analyzed multidimensional persistence modules, which we construct specifically to capture much of the information which can be gained by using multidimensional persistence over one-dimensional persistence. We argue that the global sections of this space provide interesting numeric invariants when evaluated against our subclass of multidimensional persistence modules. Lastly, we extend these global sections to the space of all multidimensional persistence modules and discuss how the resulting numeric invariants might be used to study data.

  5. Environmental surveys

    International Nuclear Information System (INIS)

    Costa-Ribeiro, C.


    An environmental survey conducted in high natural radioactivity areas and methods used to evaluated radiation doses received by the population are presented. It is shown doses absorved due to ingestion of radioactively contaminated food and water. Exposure to external gamma radiation fields or inhalation of abnormal quantities of natural airborne radioactivity are discussed [pt

  6. Survey < > Creation

    DEFF Research Database (Denmark)


    The project, Survey Creation suggests that point cloud models from 3D scans of an existing space can be the source for explorative drawings. By probing into the procedure of 3D laser scanning, it became possible to make use of the available point clouds to both access geometric representation......) and the creation drawing (of the anticipated)....

  7. Numerical investigations of gravitational collapse

    Energy Technology Data Exchange (ETDEWEB)

    Csizmadia, Peter; Racz, Istvan, E-mail: iracz@rmki.kfki.h [RMKI, Budapest, Konkoly Thege Miklos ut 29-33, H-1121 (Hungary)


    Some properties of a new framework for simulating generic 4-dimensional spherically symmetric gravitating systems are discussed. The framework can be used to investigate spacetimes that undergo complete gravitational collapse. The analytic setup is chosen to ensure that our numerical method is capable to follow the time evolution everywhere, including the black hole region.

  8. Numerical modeling of economic uncertainty

    DEFF Research Database (Denmark)

    Schjær-Jacobsen, Hans


    Representation and modeling of economic uncertainty is addressed by different modeling methods, namely stochastic variables and probabilities, interval analysis, and fuzzy numbers, in particular triple estimates. Focusing on discounted cash flow analysis numerical results are presented, comparisons...... are made between alternative modeling methods, and characteristics of the methods are discussed....

  9. Numerical relativity and asymptotic flatness

    International Nuclear Information System (INIS)

    Deadman, E; Stewart, J M


    It is highly plausible that the region of spacetime far from an isolated gravitating body is, in some sense, asymptotically Minkowskian. However theoretical studies of the full nonlinear theory, initiated by Bondi et al (1962 Proc. R. Soc. A 269 21-51), Sachs (1962 Proc. R. Soc. A 270 103-26) and Newman and Unti (1962 J. Math. Phys. 3 891-901), rely on careful, clever, a priori choices of a chart (and tetrad) and so are not readily accessible to the numerical relativist, who chooses her/his chart on the basis of quite different grounds. This paper seeks to close this gap. Starting from data available in a typical numerical evolution, we construct a chart and tetrad which are, asymptotically, sufficiently close to the theoretical ones, so that the key concepts of the Bondi news function, Bondi mass and its rate of decrease can be estimated. In particular, these estimates can be expressed in the numerical relativist's chart as numerical relativity recipes.

  10. Numerical solution of Boltzmann's equation

    International Nuclear Information System (INIS)

    Sod, G.A.


    The numerical solution of Boltzmann's equation is considered for a gas model consisting of rigid spheres by means of Hilbert's expansion. If only the first two terms of the expansion are retained, Boltzmann's equation reduces to the Boltzmann-Hilbert integral equation. Successive terms in the Hilbert expansion are obtained by solving the same integral equation with a different source term. The Boltzmann-Hilbert integral equation is solved by a new very fast numerical method. The success of the method rests upon the simultaneous use of four judiciously chosen expansions; Hilbert's expansion for the distribution function, another expansion of the distribution function in terms of Hermite polynomials, the expansion of the kernel in terms of the eigenvalues and eigenfunctions of the Hilbert operator, and an expansion involved in solving a system of linear equations through a singular value decomposition. The numerical method is applied to the study of the shock structure in one space dimension. Numerical results are presented for Mach numbers of 1.1 and 1.6. 94 refs, 7 tables, 1 fig

  11. Numerical experiments with neural networks

    International Nuclear Information System (INIS)

    Miranda, Enrique.


    Neural networks are highly idealized models which, in spite of their simplicity, reproduce some key features of the real brain. In this paper, they are introduced at a level adequate for an undergraduate computational physics course. Some relevant magnitudes are defined and evaluated numerically for the Hopfield model and a short term memory model. (Author)

  12. Gaps in nonsymmetric numerical semigroups

    International Nuclear Information System (INIS)

    Fel, Leonid G.; Aicardi, Francesca


    There exist two different types of gaps in the nonsymmetric numerical semigroups S(d 1 , . . . , d m ) finitely generated by a minimal set of positive integers {d 1 , . . . , d m }. We give the generating functions for the corresponding sets of gaps. Detailed description of both gap types is given for the 1st nontrivial case m = 3. (author)

  13. Numerical simulation in plasma physics

    International Nuclear Information System (INIS)

    Samarskii, A.A.


    Plasma physics is not only a field for development of physical theories and mathematical models but also an object of application of the computational experiment comprising analytical and numerical methods adapted for computers. The author considers only MHD plasma physics problems. Examples treated are dissipative structures in plasma; MHD model of solar dynamo; supernova explosion simulation; and plasma compression by a liner. (Auth.)

  14. Numerical computation of MHD equilibria

    International Nuclear Information System (INIS)

    Atanasiu, C.V.


    A numerical code for a two-dimensional MHD equilibrium computation has been carried out. The code solves the Grad-Shafranov equation in its integral form, for both formulations: the free-boundary problem and the fixed boundary one. Examples of the application of the code to tokamak design are given. (author)

  15. Numerical Calabi-Yau metrics

    International Nuclear Information System (INIS)

    Douglas, Michael R.; Karp, Robert L.; Lukic, Sergio; Reinbacher, Rene


    We develop numerical methods for approximating Ricci flat metrics on Calabi-Yau hypersurfaces in projective spaces. Our approach is based on finding balanced metrics and builds on recent theoretical work by Donaldson. We illustrate our methods in detail for a one parameter family of quintics. We also suggest several ways to extend our results

  16. Numerical modeling of slow shocks

    International Nuclear Information System (INIS)

    Winske, D.


    This paper reviews previous attempt and the present status of efforts to understand the structure of slow shocks by means of time dependent numerical calculations. Studies carried out using MHD or hybrid-kinetic codes have demonstrated qualitative agreement with theory. A number of unresolved issues related to hybrid simulations of the internal shock structure are discussed in some detail. 43 refs., 8 figs

  17. Attitudes Toward Intimate Partner Violence and Associations With Condom Use Among Men in Haiti: An Analysis of the Nationally Representative Demographic Health Survey. (United States)

    Conserve, Donaldson F; Whembolua, Guy-Lucien S; Surkan, Pamela J


    Although men have substantial decision-making power regarding condom use, the majority of HIV knowledge and prevention studies in the general Haitian population have been conducted among youth and women. We investigated attitudes toward intimate partner violence, knowledge of, and use of condoms among 9493 men in Haiti using data from the 2012 nationally representative Demographic and Health Survey. Only 36% of HIV-negative and 44% of HIV-positive men reported using a condom the last time they had had sex. Logistic regression revealed that believing it was justified for a man to hit or beat his wife if she refuses to have sex with him was associated with a lower odds of condom use. The odds of using a condom during last sex was higher among men who reported knowing condoms can prevent HIV and who had been tested for HIV. Given the low rate of condom use among men in Haiti, these findings suggest that interventions promoting HIV knowledge, HIV testing, and gender-violence prevention among men may also increase condom use. © The Author(s) 2014.

  18. Survey of semantic modeling techniques

    Energy Technology Data Exchange (ETDEWEB)

    Smith, C.L.


    The analysis of the semantics of programing languages was attempted with numerous modeling techniques. By providing a brief survey of these techniques together with an analysis of their applicability for answering semantic issues, this report attempts to illuminate the state-of-the-art in this area. The intent is to be illustrative rather than thorough in the coverage of semantic models. A bibliography is included for the reader who is interested in pursuing this area of research in more detail.

  19. Workshop on Numerical Methods for Ordinary Differential Equations

    CERN Document Server

    Gear, Charles; Russo, Elvira


    Developments in numerical initial value ode methods were the focal topic of the meeting at L'Aquila which explord the connections between the classical background and new research areas such as differental-algebraic equations, delay integral and integro-differential equations, stability properties, continuous extensions (interpolants for Runge-Kutta methods and their applications, effective stepsize control, parallel algorithms for small- and large-scale parallel architectures). The resulting proceedings address many of these topics in both research and survey papers.

  20. Readership survey

    International Nuclear Information System (INIS)



    The article reviews the last readership survey, which helped to check readers' reactions and the level and style of the journal. The majority of readers (32 per cent), not surprisingly, work in high energy physics. In fact, if the estimate of the world high energy physics population as some 5000 people is correct, CERN Courier reaches every one of them. The next large category of readers is the teaching profession (21 percent), with industrialists (12 per cent) in third place

  1. Numerical simulation of random stresses on an annular turbulent flow

    International Nuclear Information System (INIS)

    Marti-Moreno, Marta


    The flow along a circular cylinder may induce structural vibrations. For the predictive analysis of such vibrations, the turbulent forcing spectrum needs to be characterized. The aim of this work is to study the turbulent fluid forces acting on a single tube in axial flow. More precisely we have performed numerical simulations of an annular flow. These simulations were carried out on a cylindrical staggered mesh by a finite difference method. We consider turbulent flow with Reynolds number up to 10 6 . The Large Eddy Simulation Method has been used. A survey of existent experiments showed that hydraulic diameter acts as an important parameter. We first showed the accuracy of the numerical code by reproducing the experiments of Mulcahy. The agreement between pressure spectra from computations and from experiments is good. Then, we applied this code to simulate new numerical experiments varying the hydraulic diameter and the flow velocity. (author) [fr

  2. Numerical simulation of Higgs models

    International Nuclear Information System (INIS)

    Jaster, A.


    The SU(2) Higgs and the Schwinger model on the lattice were analysed. Numerical simulations of the SU(2) Higgs model were performed to study the finite temperature electroweak phase transition. With the help of the multicanonical method the distribution of an order parameter at the phase transition point was measured. This was used to obtain the order of the phase transition and the value of the interface tension with the histogram method. Numerical simulations were also performed at zero temperature to perform renormalization. The measured values for the Wilson loops were used to determine the static potential and from this the renormalized gauge coupling. The Schwinger model was simulated at different gauge couplings to analyse the properties of the Kaplan-Shamir fermions. The prediction that the mass parameter gets only multiplicative renormalization was tested and verified. (orig.)

  3. Numerical methods for metamaterial design

    CERN Document Server


    This book describes a relatively new approach for the design of electromagnetic metamaterials.  Numerical optimization routines are combined with electromagnetic simulations to tailor the broadband optical properties of a metamaterial to have predetermined responses at predetermined wavelengths. After a review of both the major efforts within the field of metamaterials and the field of mathematical optimization, chapters covering both gradient-based and derivative-free design methods are considered.  Selected topics including surrogate-base optimization, adaptive mesh search, and genetic algorithms are shown to be effective, gradient-free optimization strategies.  Additionally, new techniques for representing dielectric distributions in two dimensions, including level sets, are demonstrated as effective methods for gradient-based optimization.  Each chapter begins with a rigorous review of the optimization strategy used, and is followed by numerous examples that combine the strategy with either electromag...

  4. Numerical Modelling of Electrical Discharges

    International Nuclear Information System (INIS)

    Durán-Olivencia, F J; Pontiga, F; Castellanos, A


    The problem of the propagation of an electrical discharge between a spherical electrode and a plane has been solved by means of finite element methods (FEM) using a fluid approximation and assuming weak ionization and local equilibrium with the electric field. The numerical simulation of this type of problems presents the usual difficulties of convection-diffusion-reaction problems, in addition to those associated with the nonlinearities of the charged species velocities, the formation of steep gradients of the electric field and particle densities, and the coexistence of very different temporal scales. The effect of using different temporal discretizations for the numerical integration of the corresponding system of partial differential equations will be here investigated. In particular, the so-called θ-methods will be used, which allows to implement implicit, semi-explicit and fully explicit schemes in a simple way

  5. Numerical Modeling of Shoreline Undulations

    DEFF Research Database (Denmark)

    Kærgaard, Kasper Hauberg

    model has been developed which describes the longshore sediment transport along arbitrarily shaped shorelines. The numerical model is based on a spectral wave model, a depth integrated flow model, a wave-phase resolving sediment transport description and a one-line shoreline model. First the theoretical...... of the feature and under predicts the migration speeds of the features. On the second shoreline, the shoreline model predicts undulations lengths which are longer than the observed undulations. Lastly the thesis considers field measurements of undulations of the bottom bathymetry along an otherwise straight...... length of the shoreline undulations is determined in the linear regime using a shoreline stability analysis based on the numerical model. The analysis shows that the length of the undulations in the linear regime depends on the incoming wave conditions and on the coastal profile. For larger waves...

  6. Numerical simulation of fire vortex (United States)

    Barannikova, D. D.; Borzykh, V. E.; Obukhov, A. G.


    The article considers the numerical simulation of the swirling flow of air around the smoothly heated vertical cylindrical domain in the conditions of gravity and Coriolis forces action. The solutions of the complete system of Navie-Stocks equations are numerically solved at constant viscosity and heat conductivity factors. Along with the proposed initial and boundary conditions, these solutions describe the complex non-stationary 3D flows of viscous compressible heat conducting gas. For various instants of time of the initial flow formation stage using the explicit finite-difference scheme the calculations of all gas dynamics parameters, that is density, temperature, pressure and three velocity components of gas particles, have been run. The current instant lines corresponding to the trajectories of the particles movement in the emerging flow have been constructed. A negative direction of the air flow swirling occurred in the vertical cylindrical domain heating has been defined.

  7. Numerical and Evolutionary Optimization Workshop

    CERN Document Server

    Trujillo, Leonardo; Legrand, Pierrick; Maldonado, Yazmin


    This volume comprises a selection of works presented at the Numerical and Evolutionary Optimization (NEO) workshop held in September 2015 in Tijuana, Mexico. The development of powerful search and optimization techniques is of great importance in today’s world that requires researchers and practitioners to tackle a growing number of challenging real-world problems. In particular, there are two well-established and widely known fields that are commonly applied in this area: (i) traditional numerical optimization techniques and (ii) comparatively recent bio-inspired heuristics. Both paradigms have their unique strengths and weaknesses, allowing them to solve some challenging problems while still failing in others. The goal of the NEO workshop series is to bring together people from these and related fields to discuss, compare and merge their complimentary perspectives in order to develop fast and reliable hybrid methods that maximize the strengths and minimize the weaknesses of the underlying paradigms. Throu...

  8. Uncertainty Quantification in Numerical Aerodynamics

    KAUST Repository

    Litvinenko, Alexander; Matthies, Hermann G.; Liu, Dishi; Schillings, Claudia; Schulz, Volker


    In numerical section we compares five methods, including quasi-Monte Carlo quadrature, polynomial chaos with coefficients determined by sparse quadrature and gradient-enhanced version of Kriging, radial basis functions and point collocation polynomial chaos, in their efficiency in estimating statistics of aerodynamic performance upon random perturbation to the airfoil geometry [D.Liu et al '17]. For modeling we used the TAU code, developed in DLR, Germany.

  9. Numerical Tokamak Project code comparison

    International Nuclear Information System (INIS)

    Waltz, R.E.; Cohen, B.I.; Beer, M.A.


    The Numerical Tokamak Project undertook a code comparison using a set of TFTR tokamak parameters. Local radial annulus codes of both gyrokinetic and gyrofluid types were compared for both slab and toroidal case limits assuming ion temperature gradient mode turbulence in a pure plasma with adiabatic electrons. The heat diffusivities were found to be in good internal agreement within ± 50% of the group average over five codes

  10. Numerical algorithms in secondary creep

    International Nuclear Information System (INIS)

    Feijoo, R.A.; Taroco, E.


    The problem of stationary creep is presented as well as its variational formulation, when weak constraints are established, capable of assuring one single solution. A second, so-called elasto-creep problem, is further analysed, together with its variational formulation. It is shown that its stationary solution coincides with that of the stationary creep and the advantages of this formulation with respect to the former one is emphasized. Some numerical applications showing the efficiency of the method propesed are finally presented [pt

  11. Numerical and symbolic scientific computing

    CERN Document Server

    Langer, Ulrich


    The book presents the state of the art and results and also includes articles pointing to future developments. Most of the articles center around the theme of linear partial differential equations. Major aspects are fast solvers in elastoplasticity, symbolic analysis for boundary problems, symbolic treatment of operators, computer algebra, and finite element methods, a symbolic approach to finite difference schemes, cylindrical algebraic decomposition and local Fourier analysis, and white noise analysis for stochastic partial differential equations. Further numerical-symbolic topics range from

  12. Cuba: Multidimensional numerical integration library (United States)

    Hahn, Thomas


    The Cuba library offers four independent routines for multidimensional numerical integration: Vegas, Suave, Divonne, and Cuhre. The four algorithms work by very different methods, and can integrate vector integrands and have very similar Fortran, C/C++, and Mathematica interfaces. Their invocation is very similar, making it easy to cross-check by substituting one method by another. For further safeguarding, the output is supplemented by a chi-square probability which quantifies the reliability of the error estimate.

  13. Constrained evolution in numerical relativity (United States)

    Anderson, Matthew William

    The strongest potential source of gravitational radiation for current and future detectors is the merger of binary black holes. Full numerical simulation of such mergers can provide realistic signal predictions and enhance the probability of detection. Numerical simulation of the Einstein equations, however, is fraught with difficulty. Stability even in static test cases of single black holes has proven elusive. Common to unstable simulations is the growth of constraint violations. This work examines the effect of controlling the growth of constraint violations by solving the constraints periodically during a simulation, an approach called constrained evolution. The effects of constrained evolution are contrasted with the results of unconstrained evolution, evolution where the constraints are not solved during the course of a simulation. Two different formulations of the Einstein equations are examined: the standard ADM formulation and the generalized Frittelli-Reula formulation. In most cases constrained evolution vastly improves the stability of a simulation at minimal computational cost when compared with unconstrained evolution. However, in the more demanding test cases examined, constrained evolution fails to produce simulations with long-term stability in spite of producing improvements in simulation lifetime when compared with unconstrained evolution. Constrained evolution is also examined in conjunction with a wide variety of promising numerical techniques, including mesh refinement and overlapping Cartesian and spherical computational grids. Constrained evolution in boosted black hole spacetimes is investigated using overlapping grids. Constrained evolution proves to be central to the host of innovations required in carrying out such intensive simulations.

  14. Total Survey Error for Longitudinal Surveys

    NARCIS (Netherlands)

    Lynn, Peter; Lugtig, P.J.


    This article describes the application of the total survey error paradigm to longitudinal surveys. Several aspects of survey error, and of the interactions between different types of error, are distinct in the longitudinal survey context. Furthermore, error trade-off decisions in survey design and

  15. Aeromagnetic survey in Eurajoensalmi, Olkiluoto 2008

    International Nuclear Information System (INIS)

    Levaeniemi, H.


    This report describes the survey operation, survey and processing methods and the deliverables of an aerogeophysical survey in Olkiluoto area in April 2008. The survey was conducted by Geological Survey of Finland (GTK). The survey aircraft was a twin-engine Twin Otter operated by Finnish Aviation Academy (SIO) and owned by Natural Environment Research Council / British Geological Survey (NERC / BGS), with whom GTK has established a joint venture called Joint Airborne-geoscience Capability (JAC). The survey was conducted in April 2008 during six days. The survey consists of six separate survey flights, one of which was a magnetic calibration flight. The survey was based in Pori airport. Survey line spacing was 50 meters and nominal survey altitude was 30 meters. Measurements were completed in April 2008, and data processing and reporting was done in June 2008. Two cesium magnetometers installed onboard the aircraft (at the left wingtip and in a nose cone) were measuring the magnetic total field intensity during the survey flights. An automatic compensation unit corrected the aircraft attitude errors in the magnetic data in real time. In addition to magnetic measurement, auxiliary parameters such as flight altitude and aircraft attitude were also recorded simultaneously. Reference ground base station was used for recording the temporal variations in the magnetic field and also reference data for post-positioning of coordinate information. In the post-processing phase, heading correction, base station correction and microlevelling procedures were applied to the magnetic data. The data was exported to numeric XYZ files and interpolated into grid data file. A noteworthy local detail present in the survey and in the processing was the massive power line. For safety reasons, flight altitude had to be increased and survey lines had to be cut short in the vicinity of the powerline. However, due to reasonable planning of the survey area boundaries, this caused no great

  16. Multiple Surveys of Students and Survey Fatigue (United States)

    Porter, Stephen R.; Whitcomb, Michael E.; Weitzer, William H.


    This chapter reviews the literature on survey fatigue and summarizes a research project that indicates that administering multiple surveys in one academic year can significantly suppress response rates in later surveys. (Contains 4 tables.)

  17. The Hindu-Arabic numerals

    CERN Document Server

    Smith, David Eugene


    The numbers that we call Arabic are so familiar throughout Europe and the Americas that it can be difficult to realize that their general acceptance in commercial transactions is a matter of only the last four centuries and they still remain unknown in parts of the world.In this volume, one of the earliest texts to trace the origin and development of our number system, two distinguished mathematicians collaborated to bring together many fragmentary narrations to produce a concise history of Hindu-Arabic numerals. Clearly and succinctly, they recount the labors of scholars who have studied the

  18. Radiation transport in numerical astrophysics

    International Nuclear Information System (INIS)

    Lund, C.M.


    In this article, we discuss some of the numerical techniques developed by Jim Wilson and co-workers for the calculation of time-dependent radiation flow. Difference equations for multifrequency transport are given for both a discrete-angle representation of radiation transport and a Fick's law-like representation. These methods have the important property that they correctly describe both the streaming and diffusion limits of transport theory in problems where the mean free path divided by characteristic distances varies from much less than one to much greater than one. They are also stable for timesteps comparable to the changes in physical variables, rather than being limited by stability requirements

  19. Odelouca Dam Construction: Numerical Analysis


    Brito, A.; Maranha, J. R.; Caldeira, L.


    Odelouca dam is an embankment dam, with 76 m height, recently constructed in the south of Portugal. It is zoned with a core consisting of colluvial and residual schist soil and with soil-rockfill mixtures making up the shells (weathered schist with a significant fraction of coarse sized particles). This paper presents a numerical analysis of Odelouca Dam`s construction. The material con-stants of the soil model used are determined from a comprehensive testing programme carried out in the C...

  20. On numerically pluricanonical cyclic coverings

    International Nuclear Information System (INIS)

    Kulikov, V S; Kharlamov, V M


    We investigate some properties of cyclic coverings f:Y→X (where X is a complex surface of general type) branched along smooth curves B⊂X that are numerically equivalent to a multiple of the canonical class of X. Our main results concern coverings of surfaces of general type with p g =0 and Miyaoka-Yau surfaces. In particular, such coverings provide new examples of multi-component moduli spaces of surfaces with given Chern numbers and new examples of surfaces that are not deformation equivalent to their complex conjugates

  1. Numerical methods for image registration

    CERN Document Server

    Modersitzki, Jan


    Based on the author's lecture notes and research, this well-illustrated and comprehensive text is one of the first to provide an introduction to image registration with particular emphasis on numerical methods in medical imaging. Ideal for researchers in industry and academia, it is also a suitable study guide for graduate mathematicians, computer scientists, engineers, medical physicists, and radiologists.Image registration is utilised whenever information obtained from different viewpoints needs to be combined or compared and unwanted distortion needs to be eliminated. For example, CCTV imag

  2. Disruptive Innovation in Numerical Hydrodynamics

    Energy Technology Data Exchange (ETDEWEB)

    Waltz, Jacob I. [Los Alamos National Laboratory


    We propose the research and development of a high-fidelity hydrodynamic algorithm for tetrahedral meshes that will lead to a disruptive innovation in the numerical modeling of Laboratory problems. Our proposed innovation has the potential to reduce turnaround time by orders of magnitude relative to Advanced Simulation and Computing (ASC) codes; reduce simulation setup costs by millions of dollars per year; and effectively leverage Graphics Processing Unit (GPU) and future Exascale computing hardware. If successful, this work will lead to a dramatic leap forward in the Laboratory's quest for a predictive simulation capability.

  3. Gyrotactic trapping: A numerical study (United States)

    Ghorai, S.


    Gyrotactic trapping is a mechanism proposed by Durham et al. ["Disruption of vertical motility by shear triggers formation of thin Phytoplankton layers," Science 323, 1067-1070 (2009)] to explain the formation of thin phytoplankton layer just below the ocean surface. This mechanism is examined numerically using a rational model based on the generalized Taylor dispersion theory. The crucial role of sedimentation speed in the thin layer formation is demonstrated. The effects of variation in different parameters on the thin layer formation are also investigated.

  4. Time's arrow: A numerical experiment (United States)

    Fowles, G. Richard


    The dependence of time's arrow on initial conditions is illustrated by a numerical example in which plane waves produced by an initial pressure pulse are followed as they are multiply reflected at internal interfaces of a layered medium. Wave interactions at interfaces are shown to be analogous to the retarded and advanced waves of point sources. The model is linear and the calculation is exact and demonstrably time reversible; nevertheless the results show most of the features expected of a macroscopically irreversible system, including the approach to the Maxwell-Boltzmann distribution, ergodicity, and concomitant entropy increase.

  5. Results from Numerical General Relativity (United States)

    Baker, John G.


    For several years numerical simulations have been revealing the details of general relativity's predictions for the dynamical interactions of merging black holes. I will review what has been learned of the rich phenomenology of these mergers and the resulting gravitational wave signatures. These wave forms provide a potentially observable record of the powerful astronomical events, a central target of gravitational wave astronomy. Asymmetric radiation can produce a thrust on the system which may accelerate the single black hole resulting from the merger to high relative velocity.

  6. Uncertainty Quantification in Numerical Aerodynamics

    KAUST Repository

    Litvinenko, Alexander


    We consider uncertainty quantification problem in aerodynamic simulations. We identify input uncertainties, classify them, suggest an appropriate statistical model and, finally, estimate propagation of these uncertainties into the solution (pressure, velocity and density fields as well as the lift and drag coefficients). The deterministic problem under consideration is a compressible transonic Reynolds-averaged Navier-Strokes flow around an airfoil with random/uncertain data. Input uncertainties include: uncertain angle of attack, the Mach number, random perturbations in the airfoil geometry, mesh, shock location, turbulence model and parameters of this turbulence model. This problem requires efficient numerical/statistical methods since it is computationally expensive, especially for the uncertainties caused by random geometry variations which involve a large number of variables. In numerical section we compares five methods, including quasi-Monte Carlo quadrature, polynomial chaos with coefficients determined by sparse quadrature and gradient-enhanced version of Kriging, radial basis functions and point collocation polynomial chaos, in their efficiency in estimating statistics of aerodynamic performance upon random perturbation to the airfoil geometry [D.Liu et al \\'17]. For modeling we used the TAU code, developed in DLR, Germany.

  7. Numerical modeling of foam flows

    International Nuclear Information System (INIS)

    Cheddadi, Ibrahim


    Liquid foam flows are involved in numerous applications, e.g. food and cosmetics industries, oil extraction, nuclear decontamination. Moreover, their study leads to fundamental knowledge: as it is easier to manipulate and analyse, foam is used as a model material to understand the flow of emulsions, polymers, pastes, or cell aggregates, all of which display both solid and liquid behaviour. Systematic experiments performed by Francois Graner et al. provide precise data that emphasize the non Newtonian properties of the foam. Meanwhile, Pierre Saramito proposed a visco-elasto-plastic continuous tensorial model, akin to predict the behaviour of the foam. The goal of this thesis is to understand this complex behaviour, using these two elements. We have built and validated a resolution algorithm based on a bidimensional finite elements methods. The numerical solutions are in excellent agreement with the spatial distribution of all measured quantities, and confirm the predictive capabilities of the model. The dominant parameters have been identified and we evidenced the fact that the viscous, elastic, and plastic contributions to the flow have to be treated simultaneously in a tensorial formalism. We provide a substantial contribution to the understanding of foams and open the path to realistic simulations of complex VEP flows for industrial applications. (author)

  8. Numerical Hydrodynamics in Special Relativity. (United States)

    Martí, José Maria; Müller, Ewald


    This review is concerned with a discussion of numerical methods for the solution of the equations of special relativistic hydrodynamics (SRHD). Particular emphasis is put on a comprehensive review of the application of high-resolution shock-capturing methods in SRHD. Results of a set of demanding test bench simulations obtained with different numerical SRHD methods are compared. Three applications (astrophysical jets, gamma-ray bursts and heavy ion collisions) of relativistic flows are discussed. An evaluation of various SRHD methods is presented, and future developments in SRHD are analyzed involving extension to general relativistic hydrodynamics and relativistic magneto-hydrodynamics. The review further provides FORTRAN programs to compute the exact solution of a 1D relativistic Riemann problem with zero and nonzero tangential velocities, and to simulate 1D relativistic flows in Cartesian Eulerian coordinates using the exact SRHD Riemann solver and PPM reconstruction. Supplementary material is available for this article at 10.12942/lrr-2003-7 and is accessible for authorized users.

  9. Reader survey

    Energy Technology Data Exchange (ETDEWEB)



    Many, thanks to the hundreds of people who took the time to reply to the CERN Courier readership survey questionnaire published in our May issue. Bringing out a monthly journal is a lonely business. Issue after issue goes out, and the only response is when there's an occasional factual error. Send out a readership survey and a faint echo comes back. Most striking was the sheer enthusiasm of the replies. Despite the current erosion of support in the US (see page 2), subatomic physics has significant world-wide box-office appeal. Most important was to find out who our readers are. 61% of the replies came from Europe, 21% from the USA, 14% from elsewhere, (including the former Soviet Union), and 4% from inside CERN. Not surprisingly, the main audience (37%) is in the high energy physics sector. Then comes teaching (31%), followed closely by accelerators operations and design (12%) and industry (11%). Apart from detailed breakdowns of readership and feedback on the journal's content and style, the replies revealed several major features. Firstly, the CERN Courier is widely read and appreciated. There are a lot of people outside the immediate research field who want to keep broadly up to date with the latest developments in high energy physics and related fields, without getting too involved in details. It was gratifying to receive replies from far-flung places (Nepal, Indonesia,....), and learn how much distant readers appreciate getting such regular information. 'It helps us feel part of the world scene,' was a typical such reply, from Australia. Despite jet airplanes, fax and electronic mail, our planet is still big.

  10. Reader survey

    International Nuclear Information System (INIS)



    Many, thanks to the hundreds of people who took the time to reply to the CERN Courier readership survey questionnaire published in our May issue. Bringing out a monthly journal is a lonely business. Issue after issue goes out, and the only response is when there's an occasional factual error. Send out a readership survey and a faint echo comes back. Most striking was the sheer enthusiasm of the replies. Despite the current erosion of support in the US (see page 2), subatomic physics has significant world-wide box-office appeal. Most important was to find out who our readers are. 61% of the replies came from Europe, 21% from the USA, 14% from elsewhere, (including the former Soviet Union), and 4% from inside CERN. Not surprisingly, the main audience (37%) is in the high energy physics sector. Then comes teaching (31%), followed closely by accelerators operations and design (12%) and industry (11%). Apart from detailed breakdowns of readership and feedback on the journal's content and style, the replies revealed several major features. Firstly, the CERN Courier is widely read and appreciated. There are a lot of people outside the immediate research field who want to keep broadly up to date with the latest developments in high energy physics and related fields, without getting too involved in details. It was gratifying to receive replies from far-flung places (Nepal, Indonesia,....), and learn how much distant readers appreciate getting such regular information. 'It helps us feel part of the world scene,' was a typical such reply, from Australia. Despite jet airplanes, fax and electronic mail, our planet is still big

  11. Numerical model of thyroid counter

    Directory of Open Access Journals (Sweden)

    Szuchta Maciej


    Full Text Available The aim of this study was to develop a numerical model of spectrometric thyroid counter, which is used for the measurements of internal contamination by in vivo method. The modeled detector is used for a routine internal exposure monitoring procedure in the Radiation Protection Measurements Laboratory of National Centre for Nuclear Research (NCBJ. This procedure may also be used for monitoring of occupationally exposed nuclear medicine personnel. The developed model was prepared using Monte Carlo code FLUKA 2011 ver. 2b.6 Apr-14 and FLAIR ver. 1.2-5 interface. It contains a scintillation NaI(Tl detector, the collimator and the thyroid water phantom with a reference source of iodine 131I. The geometry of the model was designed and a gamma energy spectrum of iodine 131I deposited in the detector was calculated.

  12. Numerical methods used in simulation

    International Nuclear Information System (INIS)

    Caseau, Paul; Perrin, Michel; Planchard, Jacques


    The fundamental numerical problem posed by simulation problems is the stability of the resolution diagram. The system of the most used equations is defined, since there is a family of models of increasing complexity with 3, 4 or 5 equations although only models with 3 and 4 equations have been used extensively. After defining what is meant by explicit or implicit, the best established stability results is given for one-dimension problems and then for two-dimension problems. It is shown that two types of discretisation may be defined: four and eight point diagrams (in one or two dimensions) and six and ten point diagrams (in one or two dimensions). To end, some results are given on problems that are not usually treated very much, i.e. non-asymptotic stability and the stability of diagrams based on finite elements [fr

  13. Numerical optimization using flow equations (United States)

    Punk, Matthias


    We develop a method for multidimensional optimization using flow equations. This method is based on homotopy continuation in combination with a maximum entropy approach. Extrema of the optimizing functional correspond to fixed points of the flow equation. While ideas based on Bayesian inference such as the maximum entropy method always depend on a prior probability, the additional step in our approach is to perform a continuous update of the prior during the homotopy flow. The prior probability thus enters the flow equation only as an initial condition. We demonstrate the applicability of this optimization method for two paradigmatic problems in theoretical condensed matter physics: numerical analytic continuation from imaginary to real frequencies and finding (variational) ground states of frustrated (quantum) Ising models with random or long-range antiferromagnetic interactions.

  14. Strongly correlated systems numerical methods

    CERN Document Server

    Mancini, Ferdinando


    This volume presents, for the very first time, an exhaustive collection of those modern numerical methods specifically tailored for the analysis of Strongly Correlated Systems. Many novel materials, with functional properties emerging from macroscopic quantum behaviors at the frontier of modern research in physics, chemistry and material science, belong to this class of systems. Any technique is presented in great detail by its own inventor or by one of the world-wide recognized main contributors. The exposition has a clear pedagogical cut and fully reports on the most relevant case study where the specific technique showed to be very successful in describing and enlightening the puzzling physics of a particular strongly correlated system. The book is intended for advanced graduate students and post-docs in the field as textbook and/or main reference, but also for other researchers in the field who appreciate consulting a single, but comprehensive, source or wishes to get acquainted, in a as painless as possi...

  15. Automatic validation of numerical solutions

    DEFF Research Database (Denmark)

    Stauning, Ole


    This thesis is concerned with ``Automatic Validation of Numerical Solutions''. The basic theory of interval analysis and self-validating methods is introduced. The mean value enclosure is applied to discrete mappings for obtaining narrow enclosures of the iterates when applying these mappings...... differential equations, but in this thesis, we describe how to use the methods for enclosing iterates of discrete mappings, and then later use them for discretizing solutions of ordinary differential equations. The theory of automatic differentiation is introduced, and three methods for obtaining derivatives...... are described: The forward, the backward, and the Taylor expansion methods. The three methods have been implemented in the C++ program packages FADBAD/TADIFF. Some examples showing how to use the three metho ds are presented. A feature of FADBAD/TADIFF not present in other automatic differentiation packages...

  16. Operator theory and numerical methods

    CERN Document Server

    Fujita, H; Suzuki, T


    In accordance with the developments in computation, theoretical studies on numerical schemes are now fruitful and highly needed. In 1991 an article on the finite element method applied to evolutionary problems was published. Following the method, basically this book studies various schemes from operator theoretical points of view. Many parts are devoted to the finite element method, but other schemes and problems (charge simulation method, domain decomposition method, nonlinear problems, and so forth) are also discussed, motivated by the observation that practically useful schemes have fine mathematical structures and the converses are also true. This book has the following chapters: 1. Boundary Value Problems and FEM. 2. Semigroup Theory and FEM. 3. Evolution Equations and FEM. 4. Other Methods in Time Discretization. 5. Other Methods in Space Discretization. 6. Nonlinear Problems. 7. Domain Decomposition Method.

  17. Plasma modelling and numerical simulation

    International Nuclear Information System (INIS)

    Van Dijk, J; Kroesen, G M W; Bogaerts, A


    Plasma modelling is an exciting subject in which virtually all physical disciplines are represented. Plasma models combine the electromagnetic, statistical and fluid dynamical theories that have their roots in the 19th century with the modern insights concerning the structure of matter that were developed throughout the 20th century. The present cluster issue consists of 20 invited contributions, which are representative of the state of the art in plasma modelling and numerical simulation. These contributions provide an in-depth discussion of the major theories and modelling and simulation strategies, and their applications to contemporary plasma-based technologies. In this editorial review, we introduce and complement those papers by providing a bird's eye perspective on plasma modelling and discussing the historical context in which it has surfaced. (editorial review)

  18. Physical and Relativistic Numerical Cosmology. (United States)

    Anninos, Peter


    In order to account for the observable Universe, any comprehensive theory or model of cosmology must draw from many disciplines of physics, including gauge theories of strong and weak interactions, the hydrodynamics and microphysics of baryonic matter, electromagnetic fields, and spacetime curvature, for example. Although it is difficult to incorporate all these physical elements into a single complete model of our Universe, advances in computing methods and technologies have contributed significantly towards our understanding of cosmological models, the Universe, and astrophysical processes within them. A sample of numerical calculations addressing specific issues in cosmology are reviewed in this article: from the Big Bang singularity dynamics to the fundamental interactions of gravitational waves; from the quark-hadron phase transition to the large scale structure of the Universe. The emphasis, although not exclusively, is on those calculations designed to test different models of cosmology against the observed Universe.

  19. Physical and Relativistic Numerical Cosmology

    Directory of Open Access Journals (Sweden)

    Peter Anninos


    Full Text Available In order to account for the observable Universe, any comprehensive theory or model of cosmology must draw from many disciplines of physics, including gauge theories of strong and weak interactions, the hydrodynamics and microphysics of baryonic matter, electromagnetic fields, and spacetime curvature, for example. Although it is difficult to incorporate all these physical elements into a single complete model of our Universe, advances in computing methods and technologies have contributed significantly towards our understanding of cosmological models, the Universe, and astrophysical processes within them. A sample of numerical calculations addressing specific issues in cosmology are reviewed in this article: from the Big Bang singularity dynamics to the fundamental interactions of gravitational waves; from the quark--hadron phase transition to the large scale structure of the Universe. The emphasis, although not exclusively, is on those calculations designed to test different models of cosmology against the observed Universe.

  20. Comprehensive numerical modelling of tokamaks

    International Nuclear Information System (INIS)

    Cohen, R.H.; Cohen, B.I.; Dubois, P.F.


    We outline a plan for the development of a comprehensive numerical model of tokamaks. The model would consist of a suite of independent, communicating packages describing the various aspects of tokamak performance (core and edge transport coefficients and profiles, heating, fueling, magnetic configuration, etc.) as well as extensive diagnostics. These codes, which may run on different computers, would be flexibly linked by a user-friendly shell which would allow run-time specification of packages and generation of pre- and post-processing functions, including workstation-based visualization of output. One package in particular, the calculation of core transport coefficients via gyrokinetic particle simulation, will become practical on the scale required for comprehensive modelling only with the advent of teraFLOP computers. Incremental effort at LLNL would be focused on gyrokinetic simulation and development of the shell

  1. Numerical methods in matrix computations

    CERN Document Server

    Björck, Åke


    Matrix algorithms are at the core of scientific computing and are indispensable tools in most applications in engineering. This book offers a comprehensive and up-to-date treatment of modern methods in matrix computation. It uses a unified approach to direct and iterative methods for linear systems, least squares and eigenvalue problems. A thorough analysis of the stability, accuracy, and complexity of the treated methods is given. Numerical Methods in Matrix Computations is suitable for use in courses on scientific computing and applied technical areas at advanced undergraduate and graduate level. A large bibliography is provided, which includes both historical and review papers as well as recent research papers. This makes the book useful also as a reference and guide to further study and research work. Åke Björck is a professor emeritus at the Department of Mathematics, Linköping University. He is a Fellow of the Society of Industrial and Applied Mathematics.

  2. Numerical evidence for 'multiscalar stars'

    International Nuclear Information System (INIS)

    Hawley, Scott H.; Choptuik, Matthew W.


    We present a class of general relativistic solitonlike solutions composed of multiple minimally coupled, massive, real scalar fields which interact only through the gravitational field. We describe a two-parameter family of solutions we call ''phase-shifted boson stars'' (parametrized by central density ρ 0 and phase δ), which are obtained by solving the ordinary differential equations associated with boson stars and then altering the phase between the real and imaginary parts of the field. These solutions are similar to boson stars as well as the oscillating soliton stars found by Seidel and Suen [E. Seidel and W. M. Suen, Phys. Rev. Lett. 66, 1659 (1991)]; in particular, long-time numerical evolutions suggest that phase-shifted boson stars are stable. Our results indicate that scalar solitonlike solutions are perhaps more generic than has been previously thought

  3. Combining Narrative and Numerical Simulation

    DEFF Research Database (Denmark)

    Hansen, Mette Sanne; Ladeby, Klaes Rohde; Rasmussen, Lauge Baungaard


    for decision makers to systematically test several different outputs of possible solutions in order to prepare for future consequences. The CSA can be a way to evaluate risks and address possible unforeseen problems in a more methodical way than either guessing or forecasting. This paper contributes...... to the decision making in operations and production management by providing new insights into modelling and simulation based on the combined narrative and numerical simulation approach as a tool for strategy making. The research question asks, “How can the CSA be applied in a practical context to support strategy...... making?” The paper uses a case study where interviews and observations were carried out in a Danish corporation. The CSA is a new way to address decision making and has both practical value and further expands the use of strategic simulation as a management tool....

  4. 77 FR 76303 - Notice of Availability of Producer Price Index (PPI) Data Users Survey (United States)


    ...) Data Users Survey AGENCY: Bureau of Labor Statistics, Labor. ACTION: Notice of availability of survey... Index (PPI) data users. The survey is necessary to: Identify PPI data users, see how they use our data... conducted a survey of PPI data users in late 1976 through early 1977. Since that time, numerous new time...

  5. Numerical modelling of fuel sprays

    Energy Technology Data Exchange (ETDEWEB)

    Bergstroem, C.


    The way the fuel is introduced into the combustion chamber is one of the most important parameters for the power output and the generation of emissions in the combustion of liquid fuels. The interaction between the turbulent gas flow field and the liquid fuel droplets, the vaporisation of them and the mixing of the gaseous fuel with the ambient air that are vital parameters in the combustion process. The use of numerical calculations is an important tool to better understand these complex interacting phenomena. This thesis reports on the numerical modelling of fuel sprays in non-reacting cases using an own developed spray module. The spray module uses the stochastic parcel method to represent the spray. The module was made in such manner that it could by coupled with different gas flow solver. Results obtained from four different gas flow solvers are presented in the thesis, including the use of two different kinds of turbulence models. In the first part the spray module is coupled with a k-{eta} based 2-D cylindrical gas flow solver. A thorough sensitivity analysis was performed on the spray and gas flow solver parameters, such as grid size dependence and sensitivity to initial values of k-{eta}. The results of the spray module were also compared to results from other spray codes, e.g. the well known KIVA code. In the second part of this thesis the spray was injected into a turbulent and fully developed crossflow studied. The spray module was attached to a LES (Large Eddy Simulation) based flow solvers enabling the study of the complex structures and time dependent phenomena involved in spray in crossflows. It was found that the spray performs an oscillatory motion and that the Strouhal number in the wake was about 0.1. Different spray breakup models were evaluated by comparing with experimental results 66 refs, 56 figs

  6. Literature survey

    International Nuclear Information System (INIS)

    Drury, J.S.; Michelson, D.; Ensminger, J.T.


    Literature was searched for methods of removing uranium from drinking water. No relevant papers were found, but approximately 1000 publications were identified in a less specific search for methods of removing uranium from water. Most of the latter publications dealt with the recovery of uranium from ores, industrial and analytical chemistry solutions, or seawater. The conditions under which these studies were performed were usually quite different from those normally occurring in municipal water treatment practice, but some potentially interesting systems of recovery were identified. A few papers addressed the problem of removing uranium from natural fresh waters and established the effectiveness of using adsorbents or coprecipitants, such as aluminum hydroxide, ferric hydroxide, activated carbon, and ion exchangers, under certain conditions. Also, many US manufacturers and users of water treatment equipment and products were contacted regarding recommended methods of removing uranium from potable water. Based on the results of these surveys, it is recommended that untreated, partially treated, and finished water samples from municipal water treatment facilities be analyzed to determine their extent of removal of uranium by presently used procedures. In addition, laboratory studies are suggested to determine what changes, if any, are needed to maximize the effectiveness of treatments that are already in use in existing water treatment plants

  7. Numerical calculations in quantum field theories

    International Nuclear Information System (INIS)

    Rebbi, C.


    Four lecture notes are included: (1) motivation for numerical calculations in Quantum Field Theory; (2) numerical simulation methods; (3) Monte Carlo studies of Quantum Chromo Dynamics; and (4) systems with fermions. 23 references

  8. Numerical prediction of shoreline adjacent to breakwater

    Digital Repository Service at National Institute of Oceanography (India)

    Mahadevan, R.; Chandramohan, P.; Nayak, B.U.

    Existing mathematical models for prediction of shoreline changes in the vicinity of a breakwater were reviewed The analytical and numerical results obtained from these models have been compared Under the numerical approach, two different implicit...

  9. Violence in the emergency department: a survey of health care workers. (United States)

    Fernandes, C M; Bouthillette, F; Raboud, J M; Bullock, L; Moore, C F; Christenson, J M; Grafstein, E; Rae, S; Ouellet, L; Gillrie, C; Way, M


    Violence in the workplace is an ill-defined and underreported concern for health care workers. The objectives of this study were to examine perceived levels of violence in the emergency department, to obtain health care workers' definitions of violence, to determine the effect of violence on health care workers and to determine coping mechanisms and potential preventive strategies. A retrospective written survey of all 163 emergency department employees working in 1996 at an urban inner-city tertiary care centre in Vancouver. The survey elicited demographic information, personal definition of violence, severity of violence, degree of stress as a result of violence and estimate of the number of encounters with violence in the workplace in 1996. The authors examined the effects of violence on job performance and job satisfaction, and reviewed coping and potential preventive strategies. Of the 163 staff, 106 (65%) completed the survey. A total of 68% (70/103) reported an increased frequency of violence over time, and 60% (64/106) reported an increased severity. Most of the respondents felt that violence included witnessing verbal abuse (76%) and witnessing physical threats or assaults (86%). Sixty respondents (57%) were physically assaulted in 1996. Overall, 51 respondents (48%) reported impaired job performance for the rest of the shift or the rest of the week after an incident of violence. Seventy-seven respondents (73%) were afraid of patients as a result of violence, almost half (49%) hid their identities from patients, and 78 (74%) had reduced job satisfaction. Over one-fourth of the respondents (27/101) took days off because of violence. Of the 18 respondents no longer working in the emergency department, 12 (67%) reported that they had left the job at least partly owing to violence. Twenty-four-hour security and a workshop on violence prevention strategies were felt to be the most useful potential interventions. Physical exercise, sleep and the company of

  10. A latent transition model of the effects of a teen dating violence prevention initiative. (United States)

    Williams, Jason; Miller, Shari; Cutbush, Stacey; Gibbs, Deborah; Clinton-Sherrod, Monique; Jones, Sarah


    Patterns of physical and psychological teen dating violence (TDV) perpetration, victimization, and related behaviors were examined with data from the evaluation of the Start Strong: Building Healthy Teen Relationships initiative, a dating violence primary prevention program targeting middle school students. Latent class and latent transition models were used to estimate distinct patterns of TDV and related behaviors of bullying and sexual harassment in seventh grade students at baseline and to estimate transition probabilities from one pattern of behavior to another at the 1-year follow-up. Intervention effects were estimated by conditioning transitions on exposure to Start Strong. Latent class analyses suggested four classes best captured patterns of these interrelated behaviors. Classes were characterized by elevated perpetration and victimization on most behaviors (the multiproblem class), bullying perpetration/victimization and sexual harassment victimization (the bully-harassment victimization class), bullying perpetration/victimization and psychological TDV victimization (bully-psychological victimization), and experience of bully victimization (bully victimization). Latent transition models indicated greater stability of class membership in the comparison group. Intervention students were less likely to transition to the most problematic pattern and more likely to transition to the least problem class. Although Start Strong has not been found to significantly change TDV, alternative evaluation models may find important differences. Latent transition analysis models suggest positive intervention impact, especially for the transitions at the most and the least positive end of the spectrum. Copyright © 2015. Published by Elsevier Inc.

  11. 78 FR 23263 - Standing Funding Opportunity Announcement for Family Violence Prevention and Services Grants to... (United States)


    ... and group counseling, peer support groups, and referral to community-based services to assist family..., including age- appropriate counseling, supportive services, and services for the nonabusing parent that... dependents, for short-term, transitional, or long-term safety; and Provide counseling, advocacy, or...

  12. 77 FR 14378 - Family Violence Prevention and Services/Grants for Domestic Violence Shelters and Supportive... (United States)


    ...- being (Section 308(b)(1)(B)). Provision of individual and group counseling, peer support groups, and..., domestic violence, or dating violence, including age- appropriate counseling, supportive services, and... violence, and their dependents, for short-term, transitional, or long-term safety; and Provide counseling...

  13. The California Wellness Foundation's Violence Prevention Initiative: Findings from an Evaluation of the First Five Years

    National Research Council Canada - National Science Library

    Greenwood, Peter


    .... Between the mid-l980s and mid-1990s this problem became particularly acute for persons under 21, whose homicide arrests doubled and whose violent-crime victimization rate went up by more than 50 percent...

  14. 78 FR 20648 - Standing Funding Opportunity Announcement for Family Violence Prevention and Services/Grants to... (United States)


    ... representatives of Indian tribes and tribal organizations as defined in the Indian Self-Determination and...) and characteristics (e.g., self-esteem, relationship skills) can moderate the impacts of past and.... Services must not discriminate on the basis of age, disability, sex, race, color, national origin, or...

  15. Safe Schools through Strategic Alliances: How Assessment of Collaboration Enhances School Violence Prevention and Response (United States)

    Gajda, Rebecca


    In order to effectively address the complex issue of school safety, school and community partnerships are being formed with greater frequency and intensity. Collaboration between educational, law enforcement, and mental health personnel is now widely considered to be the most effective means for addressing issues of school safety (Dryfoos, 1998;…

  16. The DELTA PREP Initiative: Accelerating Coalition Capacity for Intimate Partner Violence Prevention (United States)

    Zakocs, Ronda; Freire, Kimberley E.


    Background The DELTA PREP Project aimed to build the prevention capacity of 19 state domestic violence coalitions by offering eight supports designed to promote prevention integration over a 3-year period: modest grant awards, training events, technical assistance, action planning, coaching hubs, the Coalition Prevention Capacity Assessment, an online workstation, and the online documentation support system. Objectives Using quantitative and qualitative data, we sought to explain how coalitions integrated prevention within their structures and functions and document how DELTA PREP supports contributed to coalitions’ integration process. Results We found that coalitions followed a common pathway to integrate prevention. First, coalitions exhibited precursors of organizational readiness, especially having prevention champions. Second, coalitions engaged in five critical actions: engaging in dialogue, learning about prevention, forming teams, soliciting input from the coalition, and action planning. Last, by engaging in these critical actions, coalitions enhanced two key organizational readiness factors—developing a common understanding of prevention and an organizational commitment to prevention. We also found that DELTA PREP supports contributed to coalitions’ abilities to integrate prevention by supporting learning about prevention, fostering a prevention team, and engaging in action planning by leveraging existing opportunities. Two DELTA PREP supports—coaching hubs and the workstation—did not work as initially intended. From the DELTA PREP experience, we offer several lessons to consider when designing future prevention capacity-building initiatives. PMID:26245934

  17. The Status of Violence Prevention in West Virginia Elementary Schools: A Case Study (United States)

    Pentasuglia-Filipek, Kristal Gayle


    While there is no absolute deterrent of school violence, West Virginia has taken definitive steps to try to ensure safety in our public schools. Since the launch of the Safe School initiative in 1995, training for principals, teachers and school personnel on crisis intervention and management plans have been ongoing. Students have undergone…

  18. 77 FR 14393 - Family Violence Prevention and Services/Grants to State Domestic Violence Coalitions (United States)


    ..., including those in underserved communities and racial and ethnic minorities; to provide training and... approach, which involves understanding and responding to the symptoms of chronic interpersonal trauma and... against adults or youth within the State involved, specifically including training and technical...

  19. 78 FR 21370 - Funding Opportunity Announcement for Family Violence Prevention and Services/Grants for Domestic... (United States)


    ..., which involves understanding and responding to the symptoms of chronic interpersonal trauma and... recovering from the effects of the violence. Provision of services, training, technical assistance, and... and homelessness prevention services; (5) transportation, child care, respite care, job training and...

  20. Testing a Violence-Prevention Intervention for Incarcerated Women Using a Randomized Control Trial (United States)

    Kubiak, Sheryl Pimlott; Kim, Woo Jong; Fedock, Gina; Bybee, Deborah


    Objective: Beyond Violence (BV), a new prevention program for women with assaultive offenses, demonstrated feasibility in previous studies. This study's purpose is to assess the efficacy of BV using a randomized control trial. Method: Eligible women were randomly assigned to treatment as usual (TAU) and the experimental condition (BV). Measures of…

  1. A Comparative Case Study Analysis of Campus Violence Prevention Plans at Three Illinois Higher Education Institutions (United States)

    Brown, Wade R.


    The postsecondary acts of violence at Virginia Technical University (VT) and Northern Illinois University (NIU) forced Illinois legislators to approve the "Campus Security Enhancement Act" in 2008 (110 ILCS 12/20). The "Act" requires all private and public postsecondary education institutions to develop a Campus Violence…

  2. Cultural Context of School Communities in Rural Hawaii to Inform Youth Violence Prevention (United States)

    Affonso, Dyanne D.; Mayberry, Linda; Shibuya, June Y.; Archambeau, Olga G.; Correa, Mary; Deliramich, Aimee N.; Frueh, B. Christopher


    Background: Escalation of youth violence within a large geographic school-complex area in southeastern rural Hawaii became a major problem in 2006. How cultural forces impact the problem was an impetus to examine youth violence from perspectives of adults and children in rural communities. Gathering these data was an essential first step toward…

  3. What Works in Youth Violence Prevention: A Review of the Literature (United States)

    Fagan, Abigail A.; Catalano, Richard F.


    Objectives: Given the high rates at which adolescents engage in violence, the strong link between adolescent and adult violence, and the financial and social costs of violence, the prevention of violent behavior is a national priority. Methods: The authors conducted a comprehensive review of evaluations utilizing quasi-experimental or experimental…

  4. Is violence a disease? Situating violence prevention in public health policy and practice. (United States)

    Williams, D J; Donnelly, P D


    The paper provides a review of some of the thoughts, ideas, and opinions that pervade the public health literature concerning how to classify or conceptualise violence. It is argued that violence transcends classic distinctions between communicable and non-communicable diseases, distinguishes itself from the discipline of injury control, and is influenced by wider, social determinants. Through a discussion of these varied perspectives it is concluded that a fourth revolution in public health is needed - a 'change in scope' revolution - that recognizes the influence of social justice, economics, and globalization in the aetiology of premature death and ill health, into which violence fits. However, rather than be shackled by debates of definition or classification, it is important that public health acknowledges the role it can play in preventing violence through policy and practice, and takes unified action. Copyright © 2014 The Royal Society for Public Health. Published by Elsevier Ltd. All rights reserved.

  5. Violence Prevention and Students with Disabilities: Thinking Functionally and Providing Evidence Based Supports and Accommodations (United States)

    Rosenberg, Michael S.


    Students with disabilities who engage in high rates of challenging behaviors require educators who employ function-based thinking and have a particular sensitivity to the wide range of factors that influence student behavior. In essence, educators working with special needs students need to know what makes their instruction "special"; they must…

  6. Schools Must Include Faculty and Staff in Sexual Violence Prevention Efforts (United States)

    Sales, Jessica; Krause, Kathleen


    Creating a normative campus environment intolerant to sexual violence is important for prevention. While prevention initiatives focusing on students are vital, faculty and staff have a central role in supporting and sustaining a comprehensive strategy for preventing campus sexual violence. Nationwide, colleges and universities recently implemented…

  7. An Effective Approach to Violence Prevention: Traditional Martial Arts in Middle School. (United States)

    Zivin, Gail; Hassan, Nimr R.; DePaula, Geraldine F.; Monti, Daniel A.; Harlan, Carmen; Hossain, Kashfia D.; Patterson, Ksai


    Replicated and extended the design and outcome measures of several small studies. In these studies, juveniles at high risk for violence and delinquency showed decreased violence and positive changes in psychological risk factors after being required to take a school-linked course in traditional martial arts. (Author)

  8. Evaluation of a Brazilian School Violence Prevention Program (Violência Nota Zero

    Directory of Open Access Journals (Sweden)

    Ana Carina Stelko-Pereira


    Full Text Available Objetivo. Este estudio evaluó la implementación de un programa para disminuir los niveles de violencia escolar, maximizar la participación de los estudiantes y mejorar el bienestar de maestros. Método. Participaron 71 estudiantes (21 de la escuela de intervención y 50 controles y 13 educadores (8 de la escuela de intervención y 7 del control de dos escuelas públicas de una zona de alta vulnerabilidad en Brasil. Antes y después de la intervención se aplicaron a Escala de Violencia Escolar, Escala de Adherencia Escolar (estudiantes Cuestionario General de Salud de Goldberg, Escala de Violencia Escolar (maestros. 8 meses después de finalizada la intervención se aplicaron nuevamente los anteriores instrumentos, solo en la escuela de intervención. El programa consistió de 12 sesiones de presentaciones, discusiones y ejercicios de 90 minutos para los educadores en la prevención de la violencia escolar. Resultados. Se encontró una disminución significativa en autoreporte de la perpetración de la violencia de los estudiantes (M pre-intervención = 15, M pos-intervención = 13, z = -2.5, p = 0.01 y de los problemas de salud mental de los maestros (Mdn pre-intervención = 1.8, Mdn pos-intervención = 1.4, z = 2.1, p = 0.03 en comparación con la escuela control. Sin embargo, el programa no mejoró la participación escolar ni tampoco se produjo una disminución de la victimización de estudiantes por los docentes o una reducción de la victimización del profesor por los estudiantes. Los niveles más bajos de violencia entre los estudiantes, según lo informado por ellos, se mantuvieron en las evaluaciones de seguimiento. Conclusión. A pesar de las limitaciones del estudio como el tamaño muestral y el impacto de los resultados, los hallazgos de esta investigación resultan alentadores si se tiene en cuenta que existen muchas iniciativas similares en los países que se encuentran en vía de desarrollo.

  9. The Effects of a Violence Prevention Intervention on Prosocial Behavior and Perception of School Safety (United States)

    Graham, Cheon C.


    In order for schools to be successful in providing students with developmentally appropriate instruction and social experiences, an atmosphere of safety and protection is required. The recent spike in school shootings over the past 15 years has created a sense of urgency to examine the dynamics of school violence in order to generate and implement…

  10. Review of the CDC’s “Choose Respect” Dating Violence Prevention Materials

    Directory of Open Access Journals (Sweden)

    Jodie Hertzog


    Full Text Available An overview of resources developed for the Center for Disease Control’s national “Choose Respect” initiative targeting youth ages 11-14 is provided. The initiative’s goal is to prevent teen dating violence by promoting healthy relationship development. Resources include a community action kit, downloadable video, television and radio advertisements as well as educational posters.

  11. Doorways III: Teacher Reference Materials. On School-Related Gender-Based Violence Prevention and Response (United States)

    US Agency for International Development, 2009


    The Doorways training program was designed by the U.S. Agency for International Development (USAID)-funded Safe Schools Program (Safe Schools) to enable teachers, community members and students to prevent and respond to school-related gender-based violence (SRGBV). This booklet, "Doorways III: Teacher Reference Materials on School-Related…

  12. Doorways I: Student Training Manual on School-Related Gender-Based Violence Prevention and Response (United States)

    US Agency for International Development, 2009


    The Doorways training program was designed by the U.S. Agency for International Development (USAID)-funded Safe Schools Program (Safe Schools) to enable teachers, community members and students to prevent and respond to school-related gender-based violence (SRGBV). "Doorways I: Student Training Manual on School-Related Gender-Based Violence…

  13. MENTOR-VIP: Piloting a global mentoring program for injury and violence prevention. (United States)

    Hyder, Adnan A; Meddings, David; Bachani, Abdulgafoor M


    Injuries occur as the result of a confluence of factors: environmental, social, biological, economic, and behavioral. To effectively address the burden of injuries, especially in low- and middle-income countries, a focus is needed on developing the human resource capacity for injury prevention. MENTOR-VIP is a global mentoring program that the authors developed with this need in mind. MENTOR-VIP approaches developing human resources in injury prevention by providing mentoring opportunities for junior professionals involved in its practice, research, and/or programs. MENTOR-VIP entails a 12-month working relationship between junior injury prevention practitioners (mentees) and more experienced individuals in the field (mentors). Its general objective is to improve global human resource capacity to effectively prevent and control injury and violence through the enhanced development of relevant skills. The program is currently in its pilot phase and is nearing the end of its second formal mentoring cycle, which began on September 1, 2008. This article discusses mentoring professionals as a key strategy to developing the human resource component of capacity, and one which complements existing approaches to capacity development. The authors also provide an overview of the rationale, modalities, objectives, and evaluation of MENTOR-VIP. This article highlights the importance of capacity building in the injury prevention field and situates MENTOR-VIP within the larger context of capacity building for global public health.

  14. A Review of Teen Dating Violence Prevention Research: What About Hispanic Youth? (United States)

    Malhotra, Krithika; Gonzalez-Guarda, Rosa M; Mitchell, Emma M


    The purpose of this article is to provide a critical review of the literature on evidence-based teen dating violence (TDV) prevention programs with a particular focus on highlighting gaps in the literature with regard to prevention efforts targeting Hispanic teens. The target populations, characteristics, designs, and results of TDV prevention studies reported in the scientific literature for the last 20 years were reviewed and analyzed according to cultural and contextual factors associated with TDV among Hispanic teens. To date, three studies have focused on a predominantly Hispanic population with only one study looking at the long-term effects of a TDV intervention. There is a growing need to develop and evaluate immediate and long-term effects of TDV prevention programs that address ethnic pride, acculturation and acculturative stress, familism, and gender norms within the context of Hispanic communities (e.g., machismo and marianismo). The authors discuss the implications for research, prevention practice, and policy regarding TDV prevention for Hispanic teens. © The Author(s) 2014.

  15. The Social Functions of Antisocial Behavior: Considerations for School Violence Prevention Strategies for Students with Disabilities (United States)

    Farmer, Thomas W.; Lane, Kathleen L.; Lee, David L.; Hamm, Jill V.; Lambert, Kerrylin


    Research on school social dynamics suggests that antisocial behavior is often supported by peer group processes particularly during late childhood and adolescence. Building from a social interactional framework, this article explores how information on the social functions of aggressive and disruptive behavior may help to guide function-based…

  16. Data Needs for Emerging Research Issues in Bully and Violence Prevention

    Directory of Open Access Journals (Sweden)

    Dorothy Espelage


    Full Text Available School violence and bullying are two public health concerns with consequences for youth in and out of school, for families, students, and community members. In this article, a social-ecological framework is briefly described as a way to understand bullying and school violence; then the National Center for Educational Statistics (NCES longitudinal and cross-sectional data sets are described in detail. Data that assess bullying and/or school violence are described, and recommendations for additional items are proposed. In general, a longitudinal, multisite, multi-informant study is needed to address definitional and etiological issues related to school violence and bullying so that prevention efforts can be developed, implemented, and evaluated that incorporate multiple levels of the ecology, including peers, schools, communities, and neighborhoods.

  17. Mediators of Effects of a Selective Family-Focused Violence Prevention Approach for Middle School Students (United States)


    This study examined how parenting and family characteristics targeted in a selective prevention program mediated effects on key youth proximal outcomes related to violence perpetration. The selective intervention was evaluated within the context of a multi-site trial involving random assignment of 37 schools to four conditions: a universal intervention composed of a student social-cognitive curriculum and teacher training, a selective family-focused intervention with a subset of high-risk students, a condition combining these two interventions, and a no-intervention control condition. Two cohorts of sixth-grade students (total N=1,062) exhibiting high levels of aggression and social influence were the sample for this study. Analyses of pre-post change compared to controls using intent-to-treat analyses found no significant effects. However, estimates incorporating participation of those assigned to the intervention and predicted participation among those not assigned revealed significant positive effects on student aggression, use of aggressive strategies for conflict management, and parental estimation of student’s valuing of achievement. Findings also indicated intervention effects on two targeted family processes: discipline practices and family cohesion. Mediation analyses found evidence that change in these processes mediated effects on some outcomes, notably aggressive behavior and valuing of school achievement. Results support the notion that changing parenting practices and the quality of family relationships can prevent the escalation in aggression and maintain positive school engagement for high-risk youth. PMID:21932067

  18. Neighborhood solutions for neighborhood problems: an empirically based violence prevention collaboration. (United States)

    Randall, J; Swenson, C C; Henggeler, S W


    Youth antisocial behavior is influenced, in part, by neighborhood context. Yet, rather than attempting to ameliorate factors contributing to youth antisocial behavior, service dollars are primarily devoted to expensive and often ineffective out-of-home placements. This article describes the development and implementation of a collaborative partnership designed to empower an economically disadvantaged neighborhood to address violent criminal behavior, substance abuse, and other serious antisocial problems of its youth while maintaining youth in the neighborhood. Through a collaboration between a university research center and neighborhood stakeholders, services are being provided to address the key priorities identified by neighborhood residents, and extensive efforts are being made to develop family and neighborhood contexts that are conducive to prosocial youth behavior.

  19. The California Wellness Foundation's Violence Prevention Initiative: Findings from an Evaluation of the First Five Years

    National Research Council Canada - National Science Library

    Greenwood, Peter


    Violence has long been a major issue for citizens of the United States, who experience homicide and robbery rates that are several times higher than those reported in most other industrialized countries...

  20. Prevencion de la violencia en las escuelas (School Violence Prevention). ERIC Digest. (United States)

    Walker, Dean

    Tactics to deal with growing violence in schools have usually relied on removal of the offender by suspension or placement outside of the mainstream classroom. However, educators and psychologists are considering the prevention of violent behavior as both a more humane and cost-effective response to the problem. The relationship between school…

  1. Barriers and Facilitators to Engaging Communities in Gender-Based Violence Prevention following a Natural Disaster. (United States)

    Sloand, Elizabeth; Killion, Cheryl; Gary, Faye A; Dennis, Betty; Glass, Nancy; Hassan, Mona; Campbell, Doris W; Callwood, Gloria B


    Humanitarian workers in disaster settings report a dramatic increase in gender-based violence (GBV). This was true after the 2010 Haiti earthquake when women and girls lost the relative security of their homes and families. Researchers from the United States Virgin Islands and the United States mainland responded by collaborating with Haitian colleagues to develop GBV-focused strategies. To start, the research team performed a situational analysis to insure that the project was culturally, ethically, and logistically appropriate. The aim of this paper is to describe how the situational analysis framework helped the researchers effectively approach this community. Using post-earthquake Haiti as an exemplar, we identify key steps, barriers, and facilitators to undertaking a situational analysis. Barriers included logistics, infrastructure, language and community factors. Facilitators included established experts, organizations and agencies. Researchers in such circumstances need to be respectful of community members as experts and patient with local environmental and cultural conditions.

  2. A 3-Component Approach Incorporating Focus Groups in Strategic Planning for Sexual Violence Prevention. (United States)

    Cruz, Theresa H; Hess, Julia Meredith; Woelk, Leona; Bear, Samantha


    Sexual violence is of special concern in New Mexico because of the presence of large priority populations in which its prevalence is high. This article describes a 3-component approach to developing a strategic plan to prevent sexual violence in the state that consisted of an advisory group, subject matter experts, and focus groups from geographically and demographically diverse communities. Both common and community-specific themes emerged from the focus groups and were included in the strategic plan. By incorporating community needs and experiences, this approach fosters increased investment in plan implementation.

  3. Entre Dos Mundos/Between Two Worlds: Youth Violence Prevention for Acculturating Latino Families (United States)

    Smokowski, Paul R.; Bacallao, Martica


    Objective: This study evaluated the efficacy of Entre Dos Mundos/Between Two Worlds (EDM) prevention for Latino adolescents. Method: In an experimental trial to compare implementation formats, 41 Latino families were randomly assigned to EDM action-oriented skills training groups, and 47 families were randomly assigned to unstructured EDM support…

  4. Examining the Preliminary Efficacy of a Dating Violence Prevention Program for Hispanic Adolescents (United States)

    Gonzalez-Guarda, Rosa Maria; Guerra, Jessica E.; Cummings, Amanda A.; Pino, Karen; Becerra, Maria M.


    The purpose of this study is to evaluate the preliminary efficacy of a dating violence (DV) prevention program for Cuban American adolescents ("JOVEN"/YOUTH: "Juntos Opuestos a la Violence Entre Novios"/Together Against Dating Violence). A randomized-controlled experimental design with a delayed condition was used to evaluate…

  5. The Fourth R: A School-Based Adolescent Dating Violence Prevention Program

    Directory of Open Access Journals (Sweden)

    David A. Wolfe


    Full Text Available This paper presents a school-based primary prevention program (The Fourth R to prevent adolescent dating violence, and related risk behaviors. The cornerstone of The Fourth R is a 21-lesson skillbased curriculum delivered by teachers who receive specialized training, that promotes healthy relationships, and targets violence, high-risk sexual behavior, and substance use among adolescents. The Fourth R was evaluated in a cluster randomized trial in 20 schools. Results indicated that teaching youth healthy relationships and skills as part of their curriculum reduced physical dating violence, and increased condom use 2.5 years later.

  6. Involving Students in Violence Prevention: Anonymous Reporting and the Need to Promote and Protect Confidences (United States)

    Stone, Carolyn; Isaacs, Madelyn L.


    Researchers queried school counselors throughout the United States 2 months prior to and 2 months following the April 1999 Columbine (CO) High School shootings. The counselors were asked whether or not they would breach a student's confidentiality in 26 specific scenarios. The "before" and "after" groups were demographically similar but differed…

  7. Strategies to Engage Men and Boys in Violence Prevention: A Global Organizational Perspective. (United States)

    Carlson, Juliana; Casey, Erin; Edleson, Jeffrey L; Tolman, Richard M; Walsh, Tova B; Kimball, Ericka


    This study presents descriptive findings from in-depth interviews with 29 representatives of organizations in Africa, Asia, Europe, Oceania, and North and South America that engage men and boys in preventing gender-based violence. In particular, the findings suggest that strategies are responsive to the specific cultural, economic, and contextual concerns of the local community, with nuanced messages and appropriate messengers. In addition, respondents reported key principles informing their organizational strategies to deepen men and boys' engagement. Attention is also paid to respondents' caution about the risks of framing of engagement practices as separate from both women's organizations and women and girls themselves. © The Author(s) 2015.

  8. Interagency mechanical operations group numerical systems group

    Energy Technology Data Exchange (ETDEWEB)



    This report consists of the minutes of the May 20-21, 1971 meeting of the Interagency Mechanical Operations Group (IMOG) Numerical Systems Group. This group looks at issues related to numerical control in the machining industry. Items discussed related to the use of CAD and CAM, EIA standards, data links, and numerical control.

  9. Large Scale Survey Data in Career Development Research (United States)

    Diemer, Matthew A.


    Large scale survey datasets have been underutilized but offer numerous advantages for career development scholars, as they contain numerous career development constructs with large and diverse samples that are followed longitudinally. Constructs such as work salience, vocational expectations, educational expectations, work satisfaction, and…

  10. Numerical schemes for explosion hazards

    International Nuclear Information System (INIS)

    Therme, Nicolas


    In nuclear facilities, internal or external explosions can cause confinement breaches and radioactive materials release in the environment. Hence, modeling such phenomena is crucial for safety matters. Blast waves resulting from explosions are modeled by the system of Euler equations for compressible flows, whereas Navier-Stokes equations with reactive source terms and level set techniques are used to simulate the propagation of flame front during the deflagration phase. The purpose of this thesis is to contribute to the creation of efficient numerical schemes to solve these complex models. The work presented here focuses on two major aspects: first, the development of consistent schemes for the Euler equations, then the buildup of reliable schemes for the front propagation. In both cases, explicit in time schemes are used, but we also introduce a pressure correction scheme for the Euler equations. Staggered discretization is used in space. It is based on the internal energy formulation of the Euler system, which insures its positivity and avoids tedious discretization of the total energy over staggered grids. A discrete kinetic energy balance is derived from the scheme and a source term is added in the discrete internal energy balance equation to preserve the exact total energy balance at the limit. High order methods of MUSCL type are used in the discrete convective operators, based solely on material velocity. They lead to positivity of density and internal energy under CFL conditions. This ensures that the total energy cannot grow and we can furthermore derive a discrete entropy inequality. Under stability assumptions of the discrete L8 and BV norms of the scheme's solutions one can prove that a sequence of converging discrete solutions necessarily converges towards the weak solution of the Euler system. Besides it satisfies a weak entropy inequality at the limit. Concerning the front propagation, we transform the flame front evolution equation (the so called

  11. Risk factors for domestic physical violence: national cross-sectional household surveys in eight southern African countries

    Directory of Open Access Journals (Sweden)

    Mitchell Steve


    Full Text Available Abstract Background The baseline to assess impact of a mass education-entertainment programme offered an opportunity to identify risk factors for domestic physical violence. Methods In 2002, cross-sectional household surveys in a stratified urban/rural last-stage random sample of enumeration areas, based on latest national census in Botswana, Lesotho, Malawi, Mozambique, Namibia, Swaziland, Zambia and Zimbabwe. Working door to door, interviewers contacted all adults aged 16–60 years present on the day of the visit, without sub-sampling. 20,639 adults were interviewed. The questionnaire in 29 languages measured domestic physical violence by the question "In the last year, have you and your partner had violent arguments where your partner beat, kicked or slapped you?" There was no measure of severity or frequency of physical violence. Results 14% of men (weighted based on 1,294/8,113 and 18% of women (weighted based on 2,032/11,063 reported being a victim of partner physical violence in the last year. There was no convincing association with age, income, education, household size and remunerated occupation. Having multiple partners was strongly associated with partner physical violence. Other associations included the income gap within households, negative attitudes about sexuality (for example, men have the right to sex with their girlfriends if they buy them gifts and negative attitudes about sexual violence (for example, forcing your partner to have sex is not rape. Particularly among men, experience of partner physical violence was associated with potentially dangerous attitudes to HIV infection. Conclusion Having multiple partners was the most consistent risk factor for domestic physical violence across all countries. This could be relevant to domestic violence prevention strategies.

  12. Numerical linear algebra with applications using Matlab

    CERN Document Server

    Ford, William


    Designed for those who want to gain a practical knowledge of modern computational techniques for the numerical solution of linear algebra problems, Numerical Linear Algebra with Applications contains all the material necessary for a first year graduate or advanced undergraduate course on numerical linear algebra with numerous applications to engineering and science. With a unified presentation of computation, basic algorithm analysis, and numerical methods to compute solutions, this book is ideal for solving real-world problems. It provides necessary mathematical background information for

  13. Numerical Computation of Detonation Stability

    KAUST Repository

    Kabanov, Dmitry


    Detonation is a supersonic mode of combustion that is modeled by a system of conservation laws of compressible fluid mechanics coupled with the equations describing thermodynamic and chemical properties of the fluid. Mathematically, these governing equations admit steady-state travelling-wave solutions consisting of a leading shock wave followed by a reaction zone. However, such solutions are often unstable to perturbations and rarely observed in laboratory experiments. The goal of this work is to study the stability of travelling-wave solutions of detonation models by the following novel approach. We linearize the governing equations about a base travelling-wave solution and solve the resultant linearized problem using high-order numerical methods. The results of these computations are postprocessed using dynamic mode decomposition to extract growth rates and frequencies of the perturbations and predict stability of travelling-wave solutions to infinitesimal perturbations. We apply this approach to two models based on the reactive Euler equations for perfect gases. For the first model with a one-step reaction mechanism, we find agreement of our results with the results of normal-mode analysis. For the second model with a two-step mechanism, we find that both types of admissible travelling-wave solutions exhibit the same stability spectra. Then we investigate the Fickett’s detonation analogue coupled with a particular reaction-rate expression. In addition to the linear stability analysis of this model, we demonstrate that it exhibits rich nonlinear dynamics with multiple bifurcations and chaotic behavior.

  14. Numerical Modeling of Ocean Circulation (United States)

    Miller, Robert N.


    The modelling of ocean circulation is important not only for its own sake, but also in terms of the prediction of weather patterns and the effects of climate change. This book introduces the basic computational techniques necessary for all models of the ocean and atmosphere, and the conditions they must satisfy. It describes the workings of ocean models, the problems that must be solved in their construction, and how to evaluate computational results. Major emphasis is placed on examining ocean models critically, and determining what they do well and what they do poorly. Numerical analysis is introduced as needed, and exercises are included to illustrate major points. Developed from notes for a course taught in physical oceanography at the College of Oceanic and Atmospheric Sciences at Oregon State University, this book is ideal for graduate students of oceanography, geophysics, climatology and atmospheric science, and researchers in oceanography and atmospheric science. Features examples and critical examination of ocean modelling and results Demonstrates the strengths and weaknesses of different approaches Includes exercises to illustrate major points and supplement mathematical and physical details

  15. Numerical study of turbulent diffusion

    International Nuclear Information System (INIS)

    McCoy, M.G.


    The problem of the numerical simulation of turbulent diffusion is studied. The two-dimensional velocity fields are assumed to be incompressible, homogeneous and stationary, and they are represented as stochastic processes. A technique is offered which creates velocity fields accurately representing the input statistics once a two point correlation function or an energy spectrum is given. Various complicated energy spectra may be represented utilizing this model. The program is then used to extract information concerning Gaussian diffusion processes. Various theories of other workers are tested including Taylor's classical representation of dispersion for times long compared with the Lagrangian correlation time. Also, a study is made of the relation between the Lagrangian and the Eulerian correlation function and a hypothesis is advanced and successfully tested. Questions concerning the relation between small eddies and the energy spectrum are considered. A criterion is advanced and successfully tested to decide whether small scale flow can be detected within the large eddies for any given spectrum. A method is developed to determine whether this small scale motion is in any sense periodic. Finally, the relation between two particle dispersion and the energy spectrum is studied anew and various theories are tested

  16. Numerical modelling of tissue-equivalent proportional counters

    International Nuclear Information System (INIS)

    Segur, P.; Colautti, P.


    In this paper a survey is given of the various numerical techniques employed to study the transport of ionising particles inside a TEPC. The first part is devoted to the description of the general concept of particle transport calculations. Thereafter, the different methods available to study transport phenomena and energy deposition in the sensitive volume and in counter walls are described. Finally, the basic ionisation mechanisms which may occur in a counter are described, and the non-equilibrium phenomena which play an important role mainly for counters that are to be used in measurements at the nanodosemeter level are studied. (author)

  17. Understanding Etna flank instability through numerical models (United States)

    Apuani, Tiziana; Corazzato, Claudia; Merri, Andrea; Tibaldi, Alessandro


    As many active volcanoes, Mount Etna shows clear evidence of flank instability, and different mechanisms were suggested to explain this flank dynamics, based on the recorded deformation pattern and character. Shallow and deep deformations, mainly associated with both eruptive and seismic events, are concentrated along recognised fracture and fault systems, mobilising the eastern and south-eastern flank of the volcano. Several interacting causes were postulated to control the phenomenon, including gravity force, magma ascent along the feeding system, and a very complex local and/or regional tectonic activity. Nevertheless, the complexity of such dynamics is still an open subject of research and being the volcano flanks heavily urbanised, the comprehension of the gravitative dynamics is a major issue for public safety and civil protection. The present research explores the effects of the main geological features (in particular the role of the subetnean clays, interposed between the Apennine-Maghrebian flysch and the volcanic products) and the role of weakness zones, identified by fracture and fault systems, on the slope instability process. The effects of magma intrusions are also investigated. The problem is addressed by integrating field data, laboratory tests and numerical modelling. A bi- and tri-dimensional stress-strain analysis was performed by a finite difference numerical code (FLAC and FLAC3D), mainly aimed at evaluating the relationship among geological features, volcano-tectonic structures and magmatic activity in controlling the deformation processes. The analyses are well supported by dedicated structural-mechanical field surveys, which allowed to estimate the rock mass strength and deformability parameters. To take into account the uncertainties which inevitably occur in a so complicated model, many efforts were done in performing a sensitivity analysis along a WNW-ESE section crossing the volcano summit and the Valle del Bove depression. This was

  18. The ISOGAL survey (United States)

    Omont, A.; ISOGAL Collaboration


    ISOGAL is a 7-15 μm ISOCAM survey, with 6'' pixels and sensitivity below 10 mJy, of ~20 deg2, in the galactic plane mostly interior to |l| = 30o. In combination with KJI DENIS data, the ISO images allow detailed studies of cold stellar populations and galactic structures in regions highly obscured throughout the inner Galaxy, with a sensitivity and pixel surface two orders of magnitude better than IRAS. Data reduction is particularly difficult because of the high density of strong sources, of memory effects and of short integration times. However, an improved data reduction is almost complete for all the fields observed, with the use of CIA ISOCAM software and of a special source extraction. The data quality is acceptable, as concerns reliability, completeness and photometric accuracy of the sources, to allow a systematic scientific analysis. A few fields, in the bulge and in the galactic disk, exemplify the results expected from the ~200 fields observed. These results include: A complete census of mass-losing AGB stars in fields of the inner bulge. Even very weak mass-loss are very well characterised, down to the RGB tip. Such stars are by far the most numerous there. They form a very well defined sequence in ISOGAL-DENIS infrared colour-magnitude diagrams. The knowledge of Long Period Variables in two Baade's Window fields confirm that their luminosity is just above the tip of this sequence, and that the spectral type of the stars of the sequence is M6-9III. The same AGB sequence is also quite visible in 7-15 μm colour-magnitude diagrams in the galactic disk, even with a very large extinction. Such AGB stars are thus particularly numerous among the ~105 sources detected by ISOGAL. However, foreground red giants and dusty young stars are also quite numerous. The latter with a few solar masses are detectable through the galactic centre distance. A number of bright young stars are identified on lines of sight close to the Galactic Centre, The combination of ISOGAL

  19. Relativistic positioning systems: Numerical simulations (United States)

    Puchades Colmenero, Neus

    The position of users located on the Earth's surface or near it may be found with the classic positioning systems (CPS). Certain information broadcast by satellites of global navigation systems, as GPS and GALILEO, may be used for positioning. The CPS are based on the Newtonian formalism, although relativistic post-Newtonian corrections are done when they are necessary. This thesis contributes to the development of a different positioning approach, which is fully relativistic from the beginning. In the relativistic positioning systems (RPS), the space-time position of any user (ship, spacecraft, and so on) can be calculated with the help of four satellites, which broadcast their proper times by means of codified electromagnetic signals. In this thesis, we have simulated satellite 4-tuples of the GPS and GALILEO constellations. If a user receives the signals from four satellites simultaneously, the emission proper times read -after decoding- are the user "emission coordinates". In order to find the user "positioning coordinates", in an appropriate almost inertial reference system, there are two possibilities: (a) the explicit relation between positioning and emission coordinates (broadcast by the satellites) is analytically found or (b) numerical codes are designed to calculate the positioning coordinates from the emission ones. Method (a) is only viable in simple ideal cases, whereas (b) allows us to consider realistic situations. In this thesis, we have designed numerical codes with the essential aim of studying two appropriate RPS, which may be generalized. Sometimes, there are two real users placed in different positions, which receive the same proper times from the same satellites; then, we say that there is bifurcation, and additional data are needed to choose the real user position. In this thesis, bifurcation is studied in detail. We have analyzed in depth two RPS models; in both, it is considered that the satellites move in the Schwarzschild's space

  20. Playing Linear Numerical Board Games Promotes Low-Income Children's Numerical Development (United States)

    Siegler, Robert S.; Ramani, Geetha B.


    The numerical knowledge of children from low-income backgrounds trails behind that of peers from middle-income backgrounds even before the children enter school. This gap may reflect differing prior experience with informal numerical activities, such as numerical board games. Experiment 1 indicated that the numerical magnitude knowledge of…

  1. Alumni Perspectives Survey, 2010. Survey Report (United States)

    Sheikh, Sabeen


    During the months of April and September of 2009, the Graduate Management Admission Council[R] (GMAC[R]) conducted the Alumni Perspectives Survey, a longitudinal study of prior respondents to the Global Management Education Graduate Survey of management students nearing graduation. A total of 3,708 alumni responded to the April 2009 survey,…

  2. Science with Synthetic Stellar Surveys (United States)

    Sanderson, Robyn Ellyn


    A new generation of observational projects is poised to revolutionize our understanding of the resolved stellar populations of Milky-Way-like galaxies at an unprecedented level of detail, ushering in an era of precision studies of galaxy formation. In the Milky Way itself, astrometric, spectroscopic and photometric surveys will measure three-dimensional positions and velocities and numerous chemical abundances for stars from the disk to the halo, as well as for many satellite dwarf galaxies. In the Local Group and beyond, HST, JWST and eventually WFIRST will deliver pristine views of resolved stars. The groundbreaking scale and dimensionality of this new view of resolved stellar populations in galaxies challenge us to develop new theoretical tools to robustly compare these surveys to simulated galaxies, in order to take full advantage of our new ability to make detailed predictions for stellar populations within a cosmological context. I will describe a framework for generating realistic synthetic star catalogs and mock surveys from state-of-the-art cosmological-hydrodynamical simulations, and present several early scientific results from, and predictions for, resolved stellar surveys of our Galaxy and its neighbors.

  3. Lesotho - Enterprise Survey (United States)

    Millennium Challenge Corporation — The 2011 MCA-Lesotho baseline enterprise survey is a national survey of enterprises. The main objective of the survey was to assess the current status of businesses...

  4. 2015 Community Survey Data (United States)

    Town of Chapel Hill, North Carolina — These are the answers to the 2015 Community Survey.A comprehensive summary of the survey results can be found here.The survey asked town members to address their...

  5. Theory and applications of numerical analysis

    CERN Document Server

    Phillips, G M


    This text is a self-contained Second Edition, providing an introductory account of the main topics in numerical analysis. The book emphasizes both the theorems which show the underlying rigorous mathematics andthe algorithms which define precisely how to program the numerical methods. Both theoretical and practical examples are included.* a unique blend of theory and applications* two brand new chapters on eigenvalues and splines* inclusion of formal algorithms* numerous fully worked examples* a large number of problems, many with solutions

  6. Numerically and experimentally analysis of creep

    International Nuclear Information System (INIS)

    Fontanive, J.A.


    The problems of creep in concrete are analyzed experimentally and numerically, comparing with classical methods and suggesting a numerical procedure for the solution of these problems. Firstly, fundamentals of viscoelasticity and its application to concrete behaviour representation are presented. Then the theories of Dischinger and Arutyunyan are studied, and a computing numerical solutions are compared in several examples. Finally, experiences on creep and relaxation are described, and its result are analyzed. Some coments on possible future developments are included. (Author) [pt

  7. Spurious Numerical Solutions Of Differential Equations (United States)

    Lafon, A.; Yee, H. C.


    Paper presents detailed study of spurious steady-state numerical solutions of differential equations that contain nonlinear source terms. Main objectives of this study are (1) to investigate how well numerical steady-state solutions of model nonlinear reaction/convection boundary-value problem mimic true steady-state solutions and (2) to relate findings of this investigation to implications for interpretation of numerical results from computational-fluid-dynamics algorithms and computer codes used to simulate reacting flows.

  8. An introduction to numerical methods and analysis

    CERN Document Server

    Epperson, James F


    Praise for the First Edition "". . . outstandingly appealing with regard to its style, contents, considerations of requirements of practice, choice of examples, and exercises.""-Zentralblatt MATH "". . . carefully structured with many detailed worked examples.""-The Mathematical Gazette The Second Edition of the highly regarded An Introduction to Numerical Methods and Analysis provides a fully revised guide to numerical approximation. The book continues to be accessible and expertly guides readers through the many available techniques of numerical methods and analysis. An Introduction to

  9. Numerical simulation of hypersonic flight experiment vehicle


    Yamamoto, Yukimitsu; Yoshioka, Minako; 山本 行光; 吉岡 美菜子


    Hypersonic aerodynamic characteristics of Hypersonic FLight EXperiment (HYFLEX vehicle were investigated by numerical simulations using Navier-Stokes CFD (Computational Fluid Dynamics) code of NAL. Numerical results were compared with experimental data obtained at Hypersonic Wind Tunnel at NAL. In order to investigate real flight aerodynamic characteristics. numerical calculations corresponding to the flight conditions suffering from maximum aero thermodynamic heating were also made and the d...

  10. Numerical Feedback Stabilization with Applications to Networks

    Directory of Open Access Journals (Sweden)

    Simone Göttlich


    Full Text Available The focus is on the numerical consideration of feedback boundary control problems for linear systems of conservation laws including source terms. We explain under which conditions the numerical discretization can be used to design feedback boundary values for network applications such as electric transmission lines or traffic flow systems. Several numerical examples illustrate the properties of the results for different types of networks.

  11. Theoretical numerical analysis a functional analysis framework

    CERN Document Server

    Atkinson, Kendall


    This textbook prepares graduate students for research in numerical analysis/computational mathematics by giving to them a mathematical framework embedded in functional analysis and focused on numerical analysis. This helps the student to move rapidly into a research program. The text covers basic results of functional analysis, approximation theory, Fourier analysis and wavelets, iteration methods for nonlinear equations, finite difference methods, Sobolev spaces and weak formulations of boundary value problems, finite element methods, elliptic variational inequalities and their numerical solu

  12. Nonlinear dynamics and numerical uncertainties in CFD (United States)

    Yee, H. C.; Sweby, P. K.


    The application of nonlinear dynamics to improve the understanding of numerical uncertainties in computational fluid dynamics (CFD) is reviewed. Elementary examples in the use of dynamics to explain the nonlinear phenomena and spurious behavior that occur in numerics are given. The role of dynamics in the understanding of long time behavior of numerical integrations and the nonlinear stability, convergence, and reliability of using time-marching, approaches for obtaining steady-state numerical solutions in CFD is explained. The study is complemented with spurious behavior observed in CFD computations.

  13. Numerical approach to one-loop integrals

    International Nuclear Information System (INIS)

    Fujimoto, Junpei; Shimizu, Yoshimitsu; Kato, Kiyoshi; Oyanagi, Yoshio.


    Two numerical methods are proposed for the calculation of one-loop scalar integrals. In the first method, the singularity is cancelled by the symmetrization of the integrand and the integration is done by a Monte-Carlo method. In the second one, after the transform of the integrand into a standard form, the integral is reduced into a regular numerical integral. These methods provide us practical tools to evaluate one-loop Feynman diagrams with desired numerical accuracy. They are extended to the integral with numerator and the treatment of the one-loop virtual correction to the cross section is also presented. (author)

  14. Numerical methods in software and analysis

    CERN Document Server

    Rice, John R


    Numerical Methods, Software, and Analysis, Second Edition introduces science and engineering students to the methods, tools, and ideas of numerical computation. Introductory courses in numerical methods face a fundamental problem-there is too little time to learn too much. This text solves that problem by using high-quality mathematical software. In fact, the objective of the text is to present scientific problem solving using standard mathematical software. This book discusses numerous programs and software packages focusing on the IMSL library (including the PROTRAN system) and ACM Algorithm

  15. Probabilistic numerics and uncertainty in computations. (United States)

    Hennig, Philipp; Osborne, Michael A; Girolami, Mark


    We deliver a call to arms for probabilistic numerical methods : algorithms for numerical tasks, including linear algebra, integration, optimization and solving differential equations, that return uncertainties in their calculations. Such uncertainties, arising from the loss of precision induced by numerical calculation with limited time or hardware, are important for much contemporary science and industry. Within applications such as climate science and astrophysics, the need to make decisions on the basis of computations with large and complex data have led to a renewed focus on the management of numerical uncertainty. We describe how several seminal classic numerical methods can be interpreted naturally as probabilistic inference. We then show that the probabilistic view suggests new algorithms that can flexibly be adapted to suit application specifics, while delivering improved empirical performance. We provide concrete illustrations of the benefits of probabilistic numeric algorithms on real scientific problems from astrometry and astronomical imaging, while highlighting open problems with these new algorithms. Finally, we describe how probabilistic numerical methods provide a coherent framework for identifying the uncertainty in calculations performed with a combination of numerical algorithms (e.g. both numerical optimizers and differential equation solvers), potentially allowing the diagnosis (and control) of error sources in computations.

  16. Transportation package design using numerical optimization

    International Nuclear Information System (INIS)

    Harding, D.C.; Witkowski, W.R.


    The purpose of this overview is twofold: first, to outline the theory and basic elements of numerical optimization; and second, to show how numerical optimization can be applied to the transportation packaging industry and used to increase efficiency and safety of radioactive and hazardous material transportation packages. A more extensive review of numerical optimization and its applications to radioactive material transportation package design was performed previously by the authors (Witkowski and Harding 1992). A proof-of-concept Type B package design is also presented as a simplified example of potential improvements achievable using numerical optimization in the design process

  17. Numerical investigation of freak waves (United States)

    Chalikov, D.


    Paper describes the results of more than 4,000 long-term (up to thousands of peak-wave periods) numerical simulations of nonlinear gravity surface waves performed for investigation of properties and estimation of statistics of extreme (‘freak') waves. The method of solution of 2-D potential wave's equations based on conformal mapping is applied to the simulation of wave behavior assigned by different initial conditions, defined by JONSWAP and Pierson-Moskowitz spectra. It is shown that nonlinear wave evolution sometimes results in appearance of very big waves. The shape of freak waves varies within a wide range: some of them are sharp-crested, others are asymmetric, with a strong forward inclination. Some of them can be very big, but not steep enough to create dangerous conditions for vessels (but not for fixed objects). Initial generation of extreme waves can occur merely as a result of group effects, but in some cases the largest wave suddenly starts to grow. The growth is followed sometimes by strong concentration of wave energy around a peak vertical. It is taking place in the course of a few peak wave periods. The process starts with an individual wave in a physical space without significant exchange of energy with surrounding waves. Sometimes, a crest-to-trough wave height can be as large as nearly three significant wave heights. On the average, only one third of all freak waves come to breaking, creating extreme conditions, however, if a wave height approaches the value of three significant wave heights, all of the freak waves break. The most surprising result was discovery that probability of non-dimensional freak waves (normalized by significant wave height) is actually independent of density of wave energy. It does not mean that statistics of extreme waves does not depend on wave energy. It just proves that normalization of wave heights by significant wave height is so effective, that statistics of non-dimensional extreme waves tends to be independent

  18. Uniqueness and numerical methods in inverse obstacle scattering

    International Nuclear Information System (INIS)

    Kress, Rainer


    The inverse problem we consider in this tutorial is to determine the shape of an obstacle from the knowledge of the far field pattern for scattering of time-harmonic plane waves. In the first part we will concentrate on the issue of uniqueness, i.e., we will investigate under what conditions an obstacle and its boundary condition can be identified from a knowledge of its far field pattern for incident plane waves. We will review some classical and some recent results and draw attention to open problems. In the second part we will survey on numerical methods for solving inverse obstacle scattering problems. Roughly speaking, these methods can be classified into three groups. Iterative methods interpret the inverse obstacle scattering problem as a nonlinear ill-posed operator equation and apply iterative schemes such as regularized Newton methods, Landweber iterations or conjugate gradient methods for its solution. Decomposition methods, in principle, separate the inverse scattering problem into an ill-posed linear problem to reconstruct the scattered wave from its far field and the subsequent determination of the boundary of the scatterer from the boundary condition. Finally, the third group consists of the more recently developed sampling methods. These are based on the numerical evaluation of criteria in terms of indicator functions that decide whether a point lies inside or outside the scatterer. The tutorial will give a survey by describing one or two representatives of each group including a discussion on the various advantages and disadvantages

  19. A delta-rule model of numerical and non-numerical order processing. (United States)

    Verguts, Tom; Van Opstal, Filip


    Numerical and non-numerical order processing share empirical characteristics (distance effect and semantic congruity), but there are also important differences (in size effect and end effect). At the same time, models and theories of numerical and non-numerical order processing developed largely separately. Currently, we combine insights from 2 earlier models to integrate them in a common framework. We argue that the same learning principle underlies numerical and non-numerical orders, but that environmental features determine the empirical differences. Implications for current theories on order processing are pointed out. PsycINFO Database Record (c) 2014 APA, all rights reserved.

  20. Numerical Magnitude Representations Influence Arithmetic Learning (United States)

    Booth, Julie L.; Siegler, Robert S.


    This study examined whether the quality of first graders' (mean age = 7.2 years) numerical magnitude representations is correlated with, predictive of, and causally related to their arithmetic learning. The children's pretest numerical magnitude representations were found to be correlated with their pretest arithmetic knowledge and to be…

  1. An outline review of numerical transport methods

    International Nuclear Information System (INIS)

    Budd, C.


    A brief review is presented of numerical methods for solving the neutron transport equation in the context of reactor physics. First the various forms of transport equation are given. Second, the various ways of classifying numerical transport methods are discussed. Finally each method (or class of methods) is outlined in turn. (U.K.)

  2. An Integrative Theory of Numerical Development (United States)

    Siegler, Robert; Lortie-Forgues, Hugues


    Understanding of numerical development is growing rapidly, but the volume and diversity of findings can make it difficult to perceive any coherence in the process. The integrative theory of numerical development posits that a coherent theme is present, however--progressive broadening of the set of numbers whose magnitudes can be accurately…

  3. Numerical simulation of mechatronic sensors and actuators

    CERN Document Server

    Kaltenbacher, Manfred


    Focuses on the physical modeling of mechatronic sensors and actuators and their precise numerical simulation using the Finite Element Method (FEM). This book discusses the physical modeling as well as numerical computation. It also gives a comprehensive introduction to finite elements, including their computer implementation.

  4. Numerical methods for hydrodynamic stability problems

    International Nuclear Information System (INIS)

    Fujimura, Kaoru


    Numerical methods for solving the Orr-Sommerfeld equation, which is the fundamental equation of the hydrodynamic stability theory for various shear flows, are reviewed and typical numerical results are presented. The methods of asymptotic solution, finite difference methods, initial value methods and expansions in orthogonal functions are compared. (author)

  5. Pure Left Neglect for Arabic Numerals (United States)

    Priftis, Konstantinos; Albanese, Silvia; Meneghello, Francesca; Pitteri, Marco


    Arabic numerals are diffused and language-free representations of number magnitude. To be effectively processed, the digits composing Arabic numerals must be spatially arranged along a left-to-right axis. We studied one patient (AK) to show that left neglect, after right hemisphere damage, can selectively impair the computation of the spatial…

  6. A Numerical Simulation for a Deterministic Compartmental ...

    African Journals Online (AJOL)

    In this work, an earlier deterministic mathematical model of HIV/AIDS is revisited and numerical solutions obtained using Eulers numerical method. Using hypothetical values for the parameters, a program was written in VISUAL BASIC programming language to generate series for the system of difference equations from the ...

  7. Numerical simulation of pulse-tube refrigerators

    NARCIS (Netherlands)

    Lyulina, I.A.; Mattheij, R.M.M.; Tijsseling, A.S.; Waele, de A.T.A.M.


    A new numerical model has been introduced to study steady oscillatory heat and mass transfer in the tube section of a pulse-tube refrigerator. Conservation equations describing compressible gas flow in the tube are solved numerically, using high resolution schemes. The equation of conservation of

  8. Gravitational radiation and 3D numerical relativity

    International Nuclear Information System (INIS)

    Nakamura, T.


    Study of Numerical Relativity in Kyoto is reviewed. Main topics discussed are 2D rotating collapse, phase cancellation effects and perturbation calculation of the gravitational radiation from a particle falling into a black hole. New numerical results on 3D time evolution of pure gravitational waves are also presented

  9. Using Electronic Surveys: Advice from Survey Professionals.

    Directory of Open Access Journals (Sweden)

    David M. Shannon


    Full Text Available The study reports the perceptions and recommendations of sixty-two experienced survey..researchers from the American Educational Research Association regarding the use of..electronic surveys. The most positive aspects cited for the use of electronic surveys were..reduction of costs (i.e., postage, phone charges, the use of electronic mail for pre-notification or..follow-up purposes, and the compatibility of data with existing software programs. These..professionals expressed limitations in using electronic surveys pertaining to the limited..sampling frame as well as issues of confidentiality, privacy, and the credibility of the sample...They advised that electronic surveys designed with the varied technological background and..capabilities of the respondent in mind, follow sound principles of survey construction, and be..administered to pre-notified, targeted populations with published email addresses.

  10. Mathematical and Numerical Modeling in Maritime Geomechanics

    Directory of Open Access Journals (Sweden)

    Miguel Martín Stickle


    Full Text Available A theoretical and numerical framework to model the foundation of marine offshore structures is presented. The theoretical model is composed by a system of partial differential equations describing coupling between seabed solid skeleton and pore fluids (water, air, oil,... combined with a system of ordinary differential equations describing the specific constitutive relation of the seabed soil skeleton. Once the theoretical model is described, the finite element numerical procedure to achieve an approximate solution of the overning equations is outlined. In order to validate the proposed theoretical and numerical framework the seaward tilt mechanism induced by the action of breaking waves over a vertical breakwater is numerically reproduced. The results numerically attained are in agreement with the main conclusions drawn from the literature associated with this failure mechanism.

  11. Numerical linear algebra theory and applications

    CERN Document Server

    Beilina, Larisa; Karchevskii, Mikhail


    This book combines a solid theoretical background in linear algebra with practical algorithms for numerical solution of linear algebra problems. Developed from a number of courses taught repeatedly by the authors, the material covers topics like matrix algebra, theory for linear systems of equations, spectral theory, vector and matrix norms combined with main direct and iterative numerical methods, least squares problems, and eigen problems. Numerical algorithms illustrated by computer programs written in MATLAB® are also provided as supplementary material on SpringerLink to give the reader a better understanding of professional numerical software for the solution of real-life problems. Perfect for a one- or two-semester course on numerical linear algebra, matrix computation, and large sparse matrices, this text will interest students at the advanced undergraduate or graduate level.

  12. Excel spreadsheet in teaching numerical methods (United States)

    Djamila, Harimi


    One of the important objectives in teaching numerical methods for undergraduates’ students is to bring into the comprehension of numerical methods algorithms. Although, manual calculation is important in understanding the procedure, it is time consuming and prone to error. This is specifically the case when considering the iteration procedure used in many numerical methods. Currently, many commercial programs are useful in teaching numerical methods such as Matlab, Maple, and Mathematica. These are usually not user-friendly by the uninitiated. Excel spreadsheet offers an initial level of programming, which it can be used either in or off campus. The students will not be distracted with writing codes. It must be emphasized that general commercial software is required to be introduced later to more elaborated questions. This article aims to report on a teaching numerical methods strategy for undergraduates engineering programs. It is directed to students, lecturers and researchers in engineering field.

  13. Violence against people with disability in England and Wales: findings from a national cross-sectional survey.

    Directory of Open Access Journals (Sweden)

    Hind Khalifeh

    causes of this violence, and national policies on violence prevention in this vulnerable group.

  14. Numerical solution of ordinary differential equations. For classical, relativistic and nano systems

    International Nuclear Information System (INIS)

    Greenspan, D.


    An up-to-date survey on numerical solutions with theory, intuition and applications. Ordinary differential equations (ODE) play a significant role in mathematics, physics and engineering sciences, and thus are part of relevant college and university courses. Many problems, however, both traditional and modern, do not possess exact solutions, and must be treated numerically. Usually this is done with software packages, but for this to be efficient requires a sound understanding of the mathematics involved. This work meets the need for an affordable textbook that helps in understanding numerical solutions of ODE. Carefully structured by an experienced textbook author, it provides a survey of ODE for various applications, both classical and modern, including such special applications as relativistic and nano systems. The examples are carefully explained and compiled into an algorithm, each of which is presented generically, independent of a specific programming language, while each chapter is rounded off with exercises. The text meets the demands of MA200 courses and of the newly created Numerical Solution of Differential Equations courses, making it ideal for both students and lecturers in physics, mathematics, mechanical engineering, electrical engineering, as well as for physicists, mathematicians, engineers, and electrical engineers. From the Contents - Euler's Method - Runge-Kutta Methods - The Method of Taylor Expansions - Large Second Order Systems with Application to Nano Systems - Completely Conservative, Covariant Numerical Methodology - Instability - Numerical Solution of Tridiagonal Linear Algebraic Systems and Related Nonlinear Systems - Approximate Solution of Boundary Value Problems - Special Relativistic Motion - Special Topics - Appendix: Basic Matrix Operations - Bibliography. (orig.) (orig.)

  15. Numeral-Incorporating Roots in Numeral Systems: A Comparative Analysis of Two Sign Languages (United States)

    Fuentes, Mariana; Massone, Maria Ignacia; Fernandez-Viader, Maria del Pilar; Makotrinsky, Alejandro; Pulgarin, Francisca


    Numeral-incorporating roots in the numeral systems of Argentine Sign Language (LSA) and Catalan Sign Language (LSC), as well as the main features of the number systems of both languages, are described and compared. Informants discussed the use of numerals and roots in both languages (in most cases in natural contexts). Ten informants took part in…

  16. Numerical methods in simulation of resistance welding

    DEFF Research Database (Denmark)

    Nielsen, Chris Valentin; Martins, Paulo A.F.; Zhang, Wenqi


    Finite element simulation of resistance welding requires coupling betweenmechanical, thermal and electrical models. This paper presents the numerical models and theircouplings that are utilized in the computer program SORPAS. A mechanical model based onthe irreducible flow formulation is utilized...... a resistance welding point of view, the most essential coupling between the above mentioned models is the heat generation by electrical current due to Joule heating. The interaction between multiple objects is anothercritical feature of the numerical simulation of resistance welding because it influences...... thecontact area and the distribution of contact pressure. The numerical simulation of resistancewelding is illustrated by a spot welding example that includes subsequent tensile shear testing...

  17. Numerical studies of the linear theta pinch

    International Nuclear Information System (INIS)

    Brackbill, J.U.; Menzel, M.T.; Barnes, D.C.


    Aspects of several physical problems associated with linear theta pinches were studied using recently developed numerical methods for the solution of the nonlinear equations for time-dependent magnetohydrodynamic flow in two- and three-dimensions. The problems studied include the propagation of end-loss produced rarefaction waves, the flow produced in a proposed injection experiment geometry, and the linear growth and nonlinear saturation of instabilities in rotating plasmas, all in linear geometries. The studies illustrate how numerical computations aid in flow visualization, and how the small amplitude behavior and nonlinear fate of plasmas in unstable equilibria can be connected through the numerical solution of the dynamical equations. (auth)

  18. 3rd International Conference on Numerical Combustion

    CERN Document Server

    Larrouturou, Bernard; Numerical Combustion


    Interest in numerical combustion is growing among applied mathematicians, physicists, chemists, engine manufacturers and many industrialists. This proceedings volume contains nine invited lectures and twenty seven contributions carefully selected by the editors. The major themes are numerical simulation of transsonic and supersonic combustion phenomena, the study of supersonic reacting mixing layers, and turbulent combustion. Emphasis is laid on hyperbolic models and on numerical simulations of hydrocarbon planes with a complete set of chemical reactions carried out in two-dimensional geometries as well as on complex reactive flow simulations.

  19. Numerical Algorithm for Delta of Asian Option

    Directory of Open Access Journals (Sweden)

    Boxiang Zhang


    Full Text Available We study the numerical solution of the Greeks of Asian options. In particular, we derive a close form solution of Δ of Asian geometric option and use this analytical form as a control to numerically calculate Δ of Asian arithmetic option, which is known to have no explicit close form solution. We implement our proposed numerical method and compare the standard error with other classical variance reduction methods. Our method provides an efficient solution to the hedging strategy with Asian options.

  20. Coincidental match of numerical simulation and physics (United States)

    Pierre, B.; Gudmundsson, J. S.


    Consequences of rapid pressure transients in pipelines range from increased fatigue to leakages and to complete ruptures of pipeline. Therefore, accurate predictions of rapid pressure transients in pipelines using numerical simulations are critical. State of the art modelling of pressure transient in general, and water hammer in particular include unsteady friction in addition to the steady frictional pressure drop, and numerical simulations rely on the method of characteristics. Comparison of rapid pressure transient calculations by the method of characteristics and a selected high resolution finite volume method highlights issues related to modelling of pressure waves and illustrates that matches between numerical simulations and physics are purely coincidental.

  1. The environmental survey manual

    International Nuclear Information System (INIS)


    The purpose of this manual is to provide guidance to the Survey and Sampling and Analysis teams that conduct the one-time Environmental Survey of the major US Department of Energy (DOE) operating facilities. This manual includes a discussion of DOE's policy on environmental issues, a review of statutory guidance as it applies to the Survey, the procedures and protocols to be used by the Survey teams, criteria for the use of the Survey teams in evaluating existing environmental data for the Survey effort, generic technical checklists used in every Survey, health and safety guidelines for the personnel conducting the Survey, including the identification of potential hazards, prescribed protective equipment, and emergency procedures, the required formats for the Survey reports, guidance on identifying environmental problems that need immediate attention by the Operations Office responsible for the particular facility, and procedures and protocols for the conduct of sampling and analysis

  2. Aerial radiation surveys

    International Nuclear Information System (INIS)

    Jobst, J.


    A recent aerial radiation survey of the surroundings of the Vitro mill in Salt Lake City shows that uranium mill tailings have been removed to many locations outside their original boundary. To date, 52 remote sites have been discovered within a 100 square kilometer aerial survey perimeter surrounding the mill; 9 of these were discovered with the recent aerial survey map. Five additional sites, also discovered by aerial survey, contained uranium ore, milling equipment, or radioactive slag. Because of the success of this survey, plans are being made to extend the aerial survey program to other parts of the Salt Lake valley where diversions of Vitro tailings are also known to exist

  3. Finger-Based Numerical Skills Link Fine Motor Skills to Numerical Development in Preschoolers. (United States)

    Suggate, Sebastian; Stoeger, Heidrun; Fischer, Ursula


    Previous studies investigating the association between fine-motor skills (FMS) and mathematical skills have lacked specificity. In this study, we test whether an FMS link to numerical skills is due to the involvement of finger representations in early mathematics. We gave 81 pre-schoolers (mean age of 4 years, 9 months) a set of FMS measures and numerical tasks with and without a specific finger focus. Additionally, we used receptive vocabulary and chronological age as control measures. FMS linked more closely to finger-based than to nonfinger-based numerical skills even after accounting for the control variables. Moreover, the relationship between FMS and numerical skill was entirely mediated by finger-based numerical skills. We concluded that FMS are closely related to early numerical skill development through finger-based numerical counting that aids the acquisition of mathematical mental representations.

  4. Numerical models for high beta magnetohydrodynamic flow

    International Nuclear Information System (INIS)

    Brackbill, J.U.


    The fundamentals of numerical magnetohydrodynamics for highly conducting, high-beta plasmas are outlined. The discussions emphasize the physical properties of the flow, and how elementary concepts in numerical analysis can be applied to the construction of finite difference approximations that capture these features. The linear and nonlinear stability of explicit and implicit differencing in time is examined, the origin and effect of numerical diffusion in the calculation of convective transport is described, and a technique for maintaining solenoidality in the magnetic field is developed. Many of the points are illustrated by numerical examples. The techniques described are applicable to the time-dependent, high-beta flows normally encountered in magnetically confined plasmas, plasma switches, and space and astrophysical plasmas. 40 refs

  5. Visualization of numerically simulated aerodynamic flow fields

    International Nuclear Information System (INIS)

    Hian, Q.L.; Damodaran, M.


    The focus of this paper is to describe the development and the application of an interactive integrated software to visualize numerically simulated aerodynamic flow fields so as to enable the practitioner of computational fluid dynamics to diagnose the numerical simulation and to elucidate essential flow physics from the simulation. The input to the software is the numerical database crunched by a supercomputer and typically consists of flow variables and computational grid geometry. This flow visualization system (FVS), written in C language is targetted at the Personal IRIS Workstations. In order to demonstrate the various visualization modules, the paper also describes the application of this software to visualize two- and three-dimensional flow fields past aerodynamic configurations which have been numerically simulated on the NEC-SXIA Supercomputer. 6 refs

  6. Development of Pelton turbine using numerical simulation

    Energy Technology Data Exchange (ETDEWEB)

    Patel, K; Patel, B; Yadav, M [Hydraulic Engineer, ALSTOM Hydro R and D India Ltd., GIDC Maneja, Vadodara - 390 013, Gujarat (India); Foggia, T, E-mail: [Hydraulic Engineer, Alstom Hydro France, Etablissement de Grenoble, 82, avenue Leon Blum BP 75, 38041 Grenoble Cedex (France)


    This paper describes recent research and development activities in the field of Pelton turbine design. Flow inside Pelton turbine is most complex due to multiphase (mixture of air and water) and free surface in nature. Numerical calculation is useful to understand flow physics as well as effect of geometry on flow. The optimized design is obtained using in-house special optimization loop. Either single phase or two phase unsteady numerical calculation could be performed. Numerical results are used to visualize the flow pattern in the water passage and to predict performance of Pelton turbine at full load as well as at part load. Model tests are conducted to determine performance of turbine and it shows good agreement with numerically predicted performance.

  7. Development of Pelton turbine using numerical simulation (United States)

    Patel, K.; Patel, B.; Yadav, M.; Foggia, T.


    This paper describes recent research and development activities in the field of Pelton turbine design. Flow inside Pelton turbine is most complex due to multiphase (mixture of air and water) and free surface in nature. Numerical calculation is useful to understand flow physics as well as effect of geometry on flow. The optimized design is obtained using in-house special optimization loop. Either single phase or two phase unsteady numerical calculation could be performed. Numerical results are used to visualize the flow pattern in the water passage and to predict performance of Pelton turbine at full load as well as at part load. Model tests are conducted to determine performance of turbine and it shows good agreement with numerically predicted performance.

  8. Fluid dynamics theory, computation, and numerical simulation

    CERN Document Server

    Pozrikidis, C


    Fluid Dynamics Theory, Computation, and Numerical Simulation is the only available book that extends the classical field of fluid dynamics into the realm of scientific computing in a way that is both comprehensive and accessible to the beginner The theory of fluid dynamics, and the implementation of solution procedures into numerical algorithms, are discussed hand-in-hand and with reference to computer programming This book is an accessible introduction to theoretical and computational fluid dynamics (CFD), written from a modern perspective that unifies theory and numerical practice There are several additions and subject expansions in the Second Edition of Fluid Dynamics, including new Matlab and FORTRAN codes Two distinguishing features of the discourse are solution procedures and algorithms are developed immediately after problem formulations are presented, and numerical methods are introduced on a need-to-know basis and in increasing order of difficulty Matlab codes are presented and discussed for a broad...

  9. Coherent Structures in Numerically Simulated Plasma Turbulence

    DEFF Research Database (Denmark)

    Kofoed-Hansen, O.; Pécseli, H.L.; Trulsen, J.


    Low level electrostatic ion acoustic turbulence generated by the ion-ion beam instability was investigated numerically. The fluctuations in potential were investigated by a conditional statistical analysis revealing propagating coherent structures having the form of negative potential wells which...

  10. Numerical modelling approach for mine backfill

    Indian Academy of Sciences (India)

    Muhammad Zaka Emad


    Jul 24, 2017 ... conditions. This paper discusses a numerical modelling strategy for modelling mine backfill material. The .... placed in an ore pass that leads the ore to the ore bin and crusher, from ... 1 year, depending on the mine plan.

  11. Development of Pelton turbine using numerical simulation

    International Nuclear Information System (INIS)

    Patel, K; Patel, B; Yadav, M; Foggia, T


    This paper describes recent research and development activities in the field of Pelton turbine design. Flow inside Pelton turbine is most complex due to multiphase (mixture of air and water) and free surface in nature. Numerical calculation is useful to understand flow physics as well as effect of geometry on flow. The optimized design is obtained using in-house special optimization loop. Either single phase or two phase unsteady numerical calculation could be performed. Numerical results are used to visualize the flow pattern in the water passage and to predict performance of Pelton turbine at full load as well as at part load. Model tests are conducted to determine performance of turbine and it shows good agreement with numerically predicted performance.

  12. Numerical study of fractional nonlinear Schrodinger equations

    KAUST Repository

    Klein, Christian; Sparber, Christof; Markowich, Peter A.


    Using a Fourier spectral method, we provide a detailed numerical investigation of dispersive Schrödinger-type equations involving a fractional Laplacian in an one-dimensional case. By an appropriate choice of the dispersive exponent, both mass

  13. Softening behaviour of concrete : numerical research

    NARCIS (Netherlands)

    Bongers, J.P.W.; Rutten, H.S.; Fijneman, H.J.


    Experimental research shows, apart from the influence of multiaxial loading conditions, that softening of concrete loaded in compression is accompanied by localization of deformations. Therefore, numerical modelling of concrete material behaviour has to take this effect into account. This implies

  14. Experimental and Numerical Investigation of Ablation Kinetics (United States)

    National Aeronautics and Space Administration — The University of Vermont (UVM) and the University of Michigan (UMI) propose a 2-year experimental and numerical research effort aimed at providing critically needed...

  15. Recent advances in numerical modeling of detonations

    Energy Technology Data Exchange (ETDEWEB)

    Mader, C.L.


    Three lectures were presented on recent advances in numerical modeling detonations entitled (1) Jet Initiation and Penetration of Explosives; (2) Explosive Desensitization by Preshocking; (3) Inert Metal-Loaded Explosives.

  16. On the complexity of numerical analysis

    DEFF Research Database (Denmark)

    Miltersen, Peter Bro; Allender, Eric; Burgisser, Peter


    an integer N, decide whether N>0. • In the Blum-Shub-Smale model, polynomial time computation over the reals (on discrete inputs) is polynomial-time equivalent to PosSLP, when there are only algebraic constants. We conjecture that using transcendental constants provides no additional power, beyond nonuniform...... reductions to PosSLP, and we present some preliminary results supporting this conjecture. • The Generic Task of Numerical Computation is also polynomial-time equivalent to PosSLP. We prove that PosSLP lies in the counting hierarchy. Combining this with work of Tiwari, we obtain that the Euclidean Traveling......We study two quite different approaches to understanding the complexity of fundamental problems in numerical analysis: • The Blum-Shub-Smale model of computation over the reals. • A problem we call the “Generic Task of Numerical Computation,” which captures an aspect of doing numerical computation...

  17. Fluid Dynamics Theory, Computation, and Numerical Simulation

    CERN Document Server

    Pozrikidis, Constantine


    Fluid Dynamics: Theory, Computation, and Numerical Simulation is the only available book that extends the classical field of fluid dynamics into the realm of scientific computing in a way that is both comprehensive and accessible to the beginner. The theory of fluid dynamics, and the implementation of solution procedures into numerical algorithms, are discussed hand-in-hand and with reference to computer programming. This book is an accessible introduction to theoretical and computational fluid dynamics (CFD), written from a modern perspective that unifies theory and numerical practice. There are several additions and subject expansions in the Second Edition of Fluid Dynamics, including new Matlab and FORTRAN codes. Two distinguishing features of the discourse are: solution procedures and algorithms are developed immediately after problem formulations are presented, and numerical methods are introduced on a need-to-know basis and in increasing order of difficulty. Matlab codes are presented and discussed for ...

  18. A numerical reference model for themomechanical subduction

    DEFF Research Database (Denmark)

    Quinquis, Matthieu; Chemia, Zurab; Tosi, Nicola


    Building an advanced numerical model of subduction requires choosing values for various geometrical parameters and material properties, among others, the initial lithosphere thicknesses, representative lithological types and their mechanical and thermal properties, rheologies, initial temperature...

  19. Numerical modelling of nearshore wave transformation

    Digital Repository Service at National Institute of Oceanography (India)

    Chandramohan, P.; Nayak, B.U.; SanilKumar, V.

    A software has been developed for numerical refraction study based on finite amplitude wave theories. Wave attenuation due to shoaling, bottom friction, bottom percolation and viscous dissipation has also been incorporated. The software...

  20. Numerical modelling of multicomponent LNAPL dissolution kinetics ...

    Indian Academy of Sciences (India)

    subsequent removal of free phase liquid, still the organic compounds are present .... Since the flow through porous media is mainly restricted to the pore space ..... initial and boundary conditions for the numerical scheme are given in table 2.