Ballistic impact of hollow-point ammunition on porcine bone

Identifying failure mechanisms in skeletal tissue allows a deeper understanding of the effects of specific projectile impacts on bone. While ballistic trauma in flat bones is largely researched, knowledge of how long bones react to gunshot impacts is limited in the literature. The impacts of deforming ammunition appear to produce higher levels of fragmentation; however, these have not been studied in depth. This study compares the damage to femora bone by HP 0.357 and 9 mm projectiles constructed with both full and semi-metal jackets. Impact experiments were undertaken on a single-stage light gas gun involving the use of a high-speed video camera and full reconstruction of the bones to ascertain fracture patterns occurring in the femora. Higher degrees of fragmentation are likened to the presence of semi-jacketed HP projectiles than jacketed HP projectiles. The observations of external facing beveled edges are believed to be associated with the increased separation of the jacket and lead core of projectiles. Additionally, experimentation has shown that the amount of kinetic energy lost postimpact is likely related to the presence or the absence of a metal jacket on an HP projectile. The observed data, therefore, suggest that the composition, rather than the configuration, of a projectile affects the type and extent of the damage.     

Unresponsive and Unpersuaded: The Unintended Consequences of a Voter Persuasion Effort

To date, field experiments on campaign tactics have focused overwhelmingly on mobilization and voter turnout, with far more limited attention to persuasion and vote choice. In this paper, we analyze a field experiment with 56,000 Wisconsin voters designed to measure the persuasive effects of canvassing, phone calls, and mailings during the 2008 presidential election. Focusing on the canvassing treatment, we find that persuasive appeals had two unintended consequences. First, they reduced responsiveness to a follow-up survey among infrequent voters, a substantively meaningful behavioral response that has the potential to induce bias in estimates of persuasion effects as well. Second, the persuasive appeals possibly reduced candidate support and almost certainly did not increase it. This counterintuitive finding is reinforced by multiple statistical methods and suggests that contact by a political campaign may engender a backlash.     

Development of an Index of Subsidized Housing Availability and its Relationship to Housing Insecurity

Housing insecurity is a known threat to child health understanding predictors of housing insecurity can help inform policies to protect the health of young children in low-income households. This study sheds light on the relationship between housing insecurity and availability of housing that is affordable to low-income households.

We developed a county-level index of availability of subsidized housing needed to meet the demand of low-income households. Our results estimate that if subsidized units are made available to an additional 5% of the eligible population, the odds of overcrowding decrease by 26% and the odds of families making multiple moves decrease by 31%. Both of these are known predictors of poor child health outcomes. Thus, these results suggest that state and federal investments in expanding the stock of subsidized housing could reduce housing insecurity and thereby also improve the health and well-being of young children, including their families' food security status.     

DIVORCING FAMILIES WITH YOUNG CHILDREN IN THE COURT'S FAMILY SERVICES UNIT Profiles and Impact of Services

Little is known about the families being served by court support services, or the effectiveness of the services provided. This study investigates 137 higher conflict, divorcing families with young children, who received services from the Family Services division. The study utilizes questionnaire data filled out by family services clinicians. The families presented with multiple mental health needs, including allegations of substance use and physical, emotional and sexual abuses of spouses and, to a lesser extent, children. Results detailed evaluation outcomes pertaining to joint legal and physical custody, showing an increase in joint legal custody, with little difference in physical custody arrangements. Evaluators did encourage less parental dropout. The data also profiled parents least likely to attend mandatory parenting education, accept evaluators' recommendations, and settle their case with mediation assistance. Identifying these families early can help family services clinicians track families into individualized service plans as needed.     

Assessing Empowerment in Divorce Mediation

The empowerment of disputants is a fundamental concern of mediation research, but empowerment is difficult to measure. This study operationally defines empowerment in a divorce case as an agreed-upon modification of the Texas Standard Possession Order in the direction of granting more time with the child to the noncustodial parent. Using a cross-case analysis of mediated and nonmediated divorce cases, this study found that couples that participated in mediation were empowered, not disempowered, in the construction of their visitation arrangements. Implications for measuring empowerment, litigation, and legislative policy are discussed.     

“Success” in policy piloting: Process,programs, and politics

Research has demonstrated that pilots contain multiple shifting purposes, not all of which relate to simple policy testing or refinement. Judging the success of policy pilots is therefore complex, requiring more than a simple judgment against declared goals. Marsh and McConnell provide a framework against which policy success can be judged, distinguishing program success from process and political success. We adapt Boven's modification of this framework and apply it to policy pilots, arguing that pilot process, outcomes and longer-term effects can all be judged in both program and political terms. We test this new framework in a pilot program in the English National Health Service, the Vanguard program, showing how consideration of these different aspects of success sheds light on the program and its aftermath. We consider the implications of the framework for the comprehensive and multifaceted evaluation of policy pilots.     

Pay to protect: Examining the factors of the use of market-based instruments for local water sustainability

Given the myriad of policy instruments aimed at enhancing water quantity conservation available to municipalities, what drives them to opt for a market-based instrument (MBI)? MBIs can be effective and efficient policy instruments to enhance water quantity conservation, but there is little known about why municipalities utilize them. This study hypothesizes that three contextual elements influence a municipality's use of an MBI: the natural, political, and structural environment. The results from two logistic regression models suggest that in a municipality suffering a higher drought level, both a conservative political environment and operating under a council-manager form of government (with the effect more pronounced under a non-council-manager form) will increase the likelihood that it will use an MBI to address water conservation.     

Further Validation of the Test of Memory Malingering (TOMM) Trial 1 Performance Validity Index: Examination of False Positives and Convergent Validity

Assessment of performance validity is an essential part of a neuropsychological evaluation, with the inclusion of two or more performance validity tests (PVTs) becoming routine practice. Considering the time to administer multiple tests, there has been some support for use of the Test of Memory Malingering (TOMM) Trial 1 (T1) as an independent, “one and done” PVT. Notably, cutoffs for TOMM T1 need further validation, with an emphasis on minimizing false-positive classifications among those with bona fide cognitive impairment. In a clinically referred sample of 127 veterans, this study examined the role of cognitive impairment in TOMM performance and the utility of a TOMM T1 as an independent PVT. Examinees were administered the TOMM and three additional PVTs as part of a comprehensive neuropsychological battery. Sixty-eight percent of examinees were classified valid (35% of valid examinees were cognitively impaired). TOMM T1?≤?40 had excellent observed sensitivity (83%) and specificity (93%) overall, with minimal false-positive classification. TOMM T1 was also significantly correlated and concordant with other memory-based PVTs. Given score ranges and failure rates for TOMM T1?≤?40 among those with neurological/neurocognitive conditions, scores in the 37–40 range may merit administration of additional TOMM trials to maximize accuracy in identifying valid-cognitively impaired versus noncredible performance. Otherwise, an abbreviated TOMM administration (i.e., only T1) using a cutoff of ≤?40—in conjunction with one or more additional PVTs—may be sufficient for detecting noncredible/invalid test performance in the absence of known or suspected neurological/neurocognitive disorders.