Choosing and Using Child Victimization Questionnaires.

Youth service professionals are increasingly expected to monitor local child victimization trends and evaluate the effectiveness of prevention and treatment programs. The use of questionnaires to measure victimization can elicit considerable data, but which questionnaires are best suited to address which needs? This Bulletin notes several benefits deriving from the use of standardized questionnaires. Specific guidelines are provided to help the reader determine the type of victimization to be measured, how the questionnaire should be administered, whether the results need to correspond to crime and child protection categories, what period of time is being measured, what the children’s ages are, and whether the results will be compared with national norms. Specific questionnaires are reviewed, and recommendations for further reading are offered. In the wake of increased public attention to the victimization of children and adolescents, the need for solid information has never been greater. Standardized questionnaires are important tools to accurately measure child victimization. Fortunately, many types of questionnaires are available, and the information that this Bulletin provides should assist you in determining which questionnaire will best meet your needs

Questions and Answers About the National Survey of Children\u27s Exposure to Violence.

Presents an overview of the National Survey of Children\u27s Exposure to Violence (NatSCEV), the most comprehensive nationwide survey to date of the incidence and prevalence of children\u27s exposure to violence, sponsored by OJJDP and the Centers for Disease Control and Prevention and carried out by the Crimes Against Children Research Center of the University of New Hampshire. It outlines the survey’s objectives and key features, how exposure to violence was measured, and plans for followup surveys and publications. NatSCEV bases its estimates on a large, nationally representative sample of more than 4,500 children ages 17 and younger. The survey interviewed caregivers of children ages 9 and younger and children and youth ages 10 to 17 about 45 different kinds of violence, abuse, and victimization in the past year and over the course of their lifetime

Economic Growth and the Environment: Theory and Facts

Several recent papers propose competing theoretical explanations for the empirical observation of an inverted U-shape relationship between enviromental degradation and per-capita income. We proprose the following test of the theory: calibrate a theoretical model to an already developed economy using information unrelated to the pollution-income curve. Then simulate the model starting from a less developed initial condition and compare the predicted pollutionincome relationship with that in the data. Our results are mixed. Some support exists for the theory that the inverted U-shape results from a corner solution in which less developed countries do not abate pollution. However, pollution peaks at a level of per capita income that is much lower than that observed in the U.S. data.Growth, Environment, pollution, emissions, Environmental Kuznets Curve, Stock Externalities, Calibration

Characterisation of a horizontal axis wind turbine’s tip and root vortices

The vortical near wake of a model horizontal axis wind turbine has been investigated experimentally in a water channel. The objective of this work is to study vortex interaction and stability of the helical vortex filaments within a horizontal axis wind turbine wake. The experimental model is a geometrically scaled version of the Tjæreborg wind turbine, which existed in western Denmark in the late 1980s. Here, the turbine was tested in both the upwind and downwind configurations. Qualitative flow visualisations using hydrogen bubble, particle streakline and planar laser-induced fluorescence techniques were combined with quantitative data measurements taken using planar particle image velocimetry. Vortices were identified using velocity gradient tensor invariants. Parameters that describe the helical vortex wake, such as the helicoidal pitch, and vortex circulation, were determined for three tip speed ratios. Particular attention is given here to the root vortex, which has been investigated minimally to date. Signatures of the coherent tip vortices are seen throughout the measurement domain; however, the signature of the root vortex is only evident much closer to the rotor plane, irrespective of the turbine configuration. It is postulated that the root vortex diffuses rapidly due to the effects of the turbine support geometries

An experimental investigation of the recirculation zone formed downstream of a forward facing step

An experimental investigation of the recirculation zone formed downstream of a forward facing step immersed in a turbulent boundary layer has been undertaken using particle image velocimetry. Bluff body flow is observed with the fixed separation point located at the leading edge of the step. The recirculation region dimensions are characterised over a range of Reynolds numbers (1400–19 000), with Reh based on the step height and the free stream velocity. Turbulent perturbations are produced in the free shear layer which develops between the recirculating flow close to the step and the free stream flow. Contour maps of amplification factor, streamwise perturbation velocity and Reynolds stresses are constructed, providing insight into optimal placement of structures within such topographical features. The mechanisms affecting the reattachment distance, namely the turbulent mixing within the boundary layer and the velocity deficit in the boundary layer, are discussed

Programming the Navier-Stokes computer: An abstract machine model and a visual editor

The Navier-Stokes computer is a parallel computer designed to solve Computational Fluid Dynamics problems. Each processor contains several floating point units which can be configured under program control to implement a vector pipeline with several inputs and outputs. Since the development of an effective compiler for this computer appears to be very difficult, machine level programming seems necessary and support tools for this process have been studied. These support tools are organized into a graphical program editor. A programming process is described by which appropriate computations may be efficiently implemented on the Navier-Stokes computer. The graphical editor would support this programming process, verifying various programmer choices for correctness and deducing values such as pipeline delays and network configurations. Step by step details are provided and demonstrated with two example programs

Children\u27s Exposure to Intimate Partner Violence and Other Family Violence.

Explores in depth the survey results from the National Survey of Children\u27s Exposure to Violence (NatSCEV) regarding exposure to family violence among children in the United States, including exposure to intimate partner violence, assaults by parents on siblings of children surveyed, and other assaults involving teen and adult household members. These results confirm that children are exposed to unacceptable rates of violence in the home. The bulletin presents information regarding the types of exposure to family violence, the gender of the perpetrator, the relationship of the child witness to the perpetrator, and youth\u27s reactions to the incident. It also discusses the implications of the survey data for researchers, practitioners, and policymakers and makes policy recommendations, including better screening protocols for exposure to family violence, improved interventions for those exposed, increased coordination of services for adult and child victims of family violence, and more prevention and education programs to reduce family violence. This is the second in a series of bulletins that present findings from NatSCEV, the most comprehensive nationwide survey to date of the incidence and prevalence of children’s exposure to violence across all ages, settings, and timeframes