爆炸波相互作用的数值模拟

本文采用数值模拟的方法分析了不同条件下爆炸波相互作用的波系相互干扰现象，探讨其机理，该研究为爆炸波的合理建模提供有意义的参考。     

Evaluating Simulant Materials for Understanding Cranial Backspatter from a Ballistic Projectile

In cranial wounds resulting from a gunshot, the study of backspatter patterns can provide information about the actual incidents by linking material to surrounding objects. This study investigates the physics of backspatter from a high‐speed projectile impact and evaluates a range of simulant materials using impact tests. Next, we evaluate a mesh‐free method called smoothed particle hydrodynamics (SPH) to model the splashing mechanism during backspatter. The study has shown that a projectile impact causes fragmentation at the impact site, while transferring momentum to fragmented particles. The particles travel along the path of least resistance, leading to partial material movement in the reverse direction of the projectile motion causing backspatter. Medium‐density fiberboard is a better simulant for a human skull than polycarbonate, and lorica leather is a better simulant for a human skin than natural rubber. SPH is an effective numerical method for modeling the high‐speed impact fracture and fragmentations.     

Teaching Students to Shape the Game: Negotiation Architecture and the Design of Manageably Dynamic Simulations

Although important work is being done in the emerging field of negotiation architecture and "shaping the game," little of it has found its way into the classroom. Simulation exercises are among the most powerful pedagogical tools available to negotiation educators, but most existing exercises have static architectures in the form of fixed parties, issues, and interests. This article summarizes existing research on negotiation design and proposes a framework for designing "manageably dynamic" exercises that can be used to teach key game-shaping concepts. The framework is illustrated through an in-depth discussion of an exercise based on the negotiations to end the civil war in El Salvador.     

Gas dispersal potential of bedding as a cause for sudden infant death

We assessed the gas dispersal potential of bedding articles used by 14 infants diagnosed with sudden unexpected infant death at autopsy. Of these cases, eight exhibited FiCO₂ values greater than 10% within 2.5 min, six of which were found prone and two supine. The results demonstrated that these eight beddings had a high rebreathing potential if they covered the babies’ faces. We did not, however, take into account in our model the large tissue stores of CO₂. As some bicarbonate pools will delay or suppress the increase of FiCO₂, the time–FiCO₂ graphs of this study are not true for living infants. This model, however, demonstrated the potential gas dispersal ability of bedding. The higher the FiCO₂ values, the more dangerous the situation for rebreathing infants. In addition, FiO₂ in the potential space around the model's face can be estimated mathematically using FiCO₂ values. The FiO₂ graph pattern for each bedding item corresponded roughly to the inverse of the FiCO₂ time course. The FiO₂ of the above eight cases decreased by 8.5% within 2.5 min. Recent studies using living infants placed prone to sleep reported that some babies exhibited larger decreases in FiO₂ than increases observed in FiCO₂. While the decrease of FiO₂ in our model is still theoretical, CO₂ accumulation and O₂ deprivation are closely related. If a striking O₂ deficiency occurs in a short period, babies can lose consciousness before an arousal response is evoked and all infants could be influenced by the poor gas dispersal of bedding; the main cause of sudden death in infancy would thus be asphyxia. When the bedding is soft, the potential for trapping CO₂ seems to be high; however, it is impossible to assess it by appearance alone. We sought to provide some objective indices for the assessment of respiratory compromise in relation to bedding using our model. When a baby is found unresponsive with his/her face covered with poor gas dispersal bedding, we should consider the possibility of asphyxia.     

CONCENTRATED DISADVANTAGE,TRADITIONAL MALE ROLE MODELS,AND AFRICAN‐AMERICAN JUVENILE VIOLENCE*

In a stagnating urban economy, Elijah Anderson's (1999) Code of the Street depicts a disadvantaged environment where residents face high levels of joblessness, poverty, racial residential isolation, and family disruption. Anderson argues that the loss of job opportunities for African‐American men deprived younger generations of traditional male role models. That is, in a disadvantaged urban setting with a lack of male role models participating in legitimate labor market activity, many young people may turn to violence. Drawing on insights from Anderson's ethnographic work, we assess the generality of Anderson's claims more broadly and explore the potential connection between his work and the macrolevel research on urban violence. Specifically, we explore the influence of male role models (older, employed black males) and the concentration of urban disadvantage on black juvenile arrests for violence across multiple cities in 2000. Overall, we find empirical support for Anderson's concerns over the removal of traditional male role models from urban areas as a result of concentrated disadvantage. Specifically, we find that the presence of traditional male role models reduces the rates of African‐American youth violence. Additionally, our measure of traditional male role models mediates the relationship between structural disadvantage and juvenile violence. We discuss the contributions of Anderson's work to the macrolevel study of urban violence.     

The Influence of Emotional Intelligence on Negotiation Outcomes and the Mediating Effect of Rapport: A Structural Equation Modeling Approach

Although early research on negotiation focused on cognition and decision‐making processes, recently, negotiation scholars have started to pay attention to the importance of emotion in negotiation and have suggested that emotional intelligence is likely to improve negotiation performance. Few studies, however, have tested the relationship between emotional intelligence and negotiation outcomes. This study contributes by empirically testing the influence of emotional intelligence on specific negotiation outcomes (joint gain, trust between parties, and the desire of parties to work together again) and also examines the mediating effects of rapport. We used a laboratory experimental design with 202 participants to test the hypotheses. We found that a negotiator's emotional intelligence was correlated with his or her counterpart's trust level and desire to work again but had no effect on joint gain. In addition, rapport fully mediated the relationship between emotional intelligence and desire to work again, and between emotional intelligence and trust.     

THE POWER OF DIVERSION: INTERMEDIATE SANCTIONS AND SENTENCING DISPARITY UNDER PRESUMPTIVE GUIDELINES*

Fiscal constraints and shifting political climates in corrections have recently led to a renewed interest in intermediate punishments. Despite their growing prevalence, though, relatively little empirical research has examined the judicial use of alternative sanctions as a sentencing option. By using 3 years of data from the Pennsylvania Commission on Sentencing (PCS), this study investigates little‐researched questions regarding the use of sentencing alternatives among offenders and across contexts. Results indicate that male and minority offenders are the least likely to receive intermediate sanctions, both as a diversionary jail or prison sentence and as a substitute for probation. The probability of receiving an intermediate sanction also varies significantly across judges and court contexts and is related to county‐level funding for these programs, among other factors. Findings are discussed as they relate to contemporary theoretical perspectives on the perceived suitability of intermediate punishments and on the unique role that offender agency plays in the sentencing of these cases. Directions for future research are discussed.     

“A Plague on both Your Houses?”: Risks,Repeats and Reconsiderations of Urban Residential Burglary

Research has shown that mapping techniques are useful in forecasting future crime events. However, the majority of prospective mapping techniques has focused on the event-dependent influence of instigator incidents on subsequent incidents and does not explicitly incorporate the risk heterogeneity of the setting. The study here discussed is a modest attempt to address this issue by using a two-step process: first, using risk terrain modeling, we operationalized the “environmental backcloth,” (the risk heterogeneity of an area) to forecast locations of residential burglaries in the urban city of Newark, New Jersey. Second, using the near repeat calculator, we assessed the variability of underlying risk between different types of residential burglaries. A discussion of the findings and the joint utility of these approaches is provided.     

Can't get no satisfaction with the Westminster model? Winners,losers and the effects of consensual and direct democratic institutions on satisfaction with democracy

Are citizens in consensus democracies with developed direct democratic institutions more satisfied with their political system than those in majoritarian democracies? In this article, individual‐level data from the second wave of the Comparative Study of Electoral Systems and an updated version of Lijphart's multivariate measure of consensus and majoritarian democracy covering 24 countries are used to investigate this question. The findings from logistic multilevel models indicate that consensual cabinet types and direct democratic institutions are associated with higher levels of citizens' satisfaction with democracy. Furthermore, consensus democracy in these institutions closes the gap in satisfaction with democracy between losers and winners of elections by both comforting losers and reducing the satisfaction of winners. Simultaneously, consensus democracy in terms of electoral rules, the executive–legislative power balance, interest groups and the party system reduces the satisfaction of election winners, but does not enhance that of losers.     

Statistical Modeling of the Case Information From the Ohio Attorney General's Sexual Assault Kit Testing Initiative

The Ohio Attorney General's Sexual Assault Kit (SAK) Testing Initiative has resulted in nearly 14,000 kits being processed since the initiation of the project in 2012. A logistic regression model was fit to the data from 2500 SAKs in order to determine the probability of obtaining at least one Combined DNA Index System (CODIS) eligible DNA profile based on a number of predictor variables. The probability of obtaining at least one CODIS eligible DNA profile from an SAK varied as a function of (i) days to kit collection following a sexual assault; (ii) years to kit submission to the laboratory for testing following kit collection; (iii) the age of the victim; and (iv) the occurrence of victim‐reported consensual sex around the time of the assault and/or kit collection. These findings demonstrate the utility of the statistical modeling of data obtained from the “forklift” testing approach of sexual assault kits.