Prediction and preliminary standardization of fire debris constituents with the advanced distillation curve method

The recent National Academy of Sciences report on forensic sciences states that the study of fire patterns and debris in arson fires is in need of additional work and eventual standardization. We discuss a recently introduced method that can provide predicted evaporation patterns for ignitable liquids as a function of temperature. The method is a complex fluid analysis protocol, the advanced distillation curve approach, featuring a composition explicit data channel for each distillate fraction (for qualitative, quantitative, and trace analysis), low uncertainty temperature measurements that are thermodynamic state points that can be modeled with an equation of state, consistency with a century of historical data, and an assessment of the energy content of each distillate fraction. We discuss the application of the method to kerosenes and gasolines and outline how expansion of the scope of fluids to other ignitable liquids can benefit the criminalist in the analysis of fire debris for arson.     

Incarceration, education and transition from delinquency

Purpose

Much of what is known regarding the transition away from crime is limited to young adulthood and specific life events and samples of non-serious offenders comprised mainly of white males.

Methods

The current study assesses the potential links between educational achievement, post-release schooling, and re-arrest for a cohort of 4,147 incarcerated youths drawn from 115 Florida juvenile institutions and followed for two years post-release.

Results

Incarcerated youths with higher levels of educational achievement are more likely to return to school after release, and those youths who returned to and attended school regularly were less likely to be rearrested within 12 and 24 months. Moreover, among youths who were rearrested, those youth who attended school regularly following release were arrested for significantly less serious offenses compared to youths who did not attend school or attended less regularly.

Conclusions

The study concludes with discussion of the importance of educational achievement as an important turning point for juvenile offenders as they transition into young adulthood.     

Social ecology, individual risk, and recidivism: A multilevel examination of main and moderating influences

Purpose

Despite a longstanding tradition in criminology to consider the impact of neighborhood context on crime-related outcomes, criminologists have largely ignored the influence of social ecology on recidivism until recently. The purpose of the present study was to examine the main and moderating influences of social ecology on recidivism.

Materials and Methods

The present study used hierarchical nonlinear modeling to estimate the effects of concentrated disadvantage, immigrant concentration, and residential stability on recidivism for a sample of offenders released from custody/supervision in 2006 and nested within Iowa counties. We controlled for individual-level risk for recidivism using the Level of Service Inventory-Revised (LSI-R), a validated risk assessment instrument. We also examined whether the relationship between LSI-R score and recidivism varied across counties, and if so, whether this variation can be explained by social structural characteristics.

Results

Results indicate that residential stability was the only contextual variable significantly related to recidivism. The relationship between individual-level risk and recidivism did not vary across contexts.

Conclusions

The findings suggest that the social structural context has limited influence on recidivism, while the LSI-R is a robust predictor of recidivism across contexts. We discuss the implications of our findings for theory, practice, and future research.     

Accountability in the Internet of Things

Accountability of governing bodies in the Internet of Things (IoT) is of major importance and requires a partly different approach than applied in the (general) Internet. Improving accountability makes the implementation of new general principles necessary in order to provide for a stable and foreseeable legal framework on which businesses can rely. In particular, standards need to be introduced that hold governing bodies accountable, information should be made more readily available and beneficiaries of accountability must be able to impose some sort of sanction on the accountable in case of non-compliance. Improving accountability by creating such framework also supports the betterment of security in the Internet of Things.     

Spectroscopic characterization of 3,4-methylenedioxypyrrolidinobutyrophenone: a new designer drug with α-pyrrolidinophenone structure

This study presents and discusses the infrared spectroscopic, the nuclear magnetic resonance spectroscopic and mass spectrometric data of the designer drug 3,4 methylenedioxypyrrolidinobutyrophenone (MDPBP), a homolog of 3,4 methylenedioxypyrovalerone (MDPV). MDPBP was first seized in Germany in the year 2009. The structure elucidation of the aliphatic part of MDPBP was carried out by product ion spectrometry of the immonium ion with m/z=112 formed after electron ionization, and by one- and two-dimensional (1)H- and (13)C NMR spectroscopy.     

An introduction to the law and economics of class action litigation

The consolidation of similar claims for compensation into a single large class of plaintiffs is referred to as “class action litigation.” This practice can have both social costs and social benefits. For an example of the social benefits of consolidating separate claims, if the facts giving rise to the claims are substantially similar, then there may be significant savings in litigation and court administrative costs from presenting those facts once rather a multitude of times. There may, however, be significant social costs to creating a class of litigants and consolidating their claims. For example, this practice may empower those with frivolous negative expected-value claims to wring an unwarranted settlement from the defendant or defendants. The article surveys other sources of social cost and benefit from class-action litigation, reviews the empirical literature on these actions, and examines recent U.S. policy debates about reforming class-action litigation. The article concludes that class-action litigation can have substantial net social benefits but only if courts assiduously oversee the class certification process so as to identify and forestall the social-cost-generating aspects of class-action litigation.     

The Dynamics of Ambivalence

This article explores the dynamics of candidate ambivalence over the course of a presidential campaign. Candidate ambivalence tends to decrease as a campaign unfolds, although the rate of ambivalence decay is not constant across time or individuals. Two alternative theories of ambivalence change are considered and tested. Consistent with a motivational account, the results indicate that partisan reasoning contributes to the diminution of ambivalence over time. Consistent with an informational account, the results suggest that exposure to heterogeneous information heightens ambivalence. Ambivalence is least likely to decline among people who are exposed to cross‐cutting information, politically sophisticated individuals with weak partisan attachments, and, during the general election phase of the campaign, those who live in homogenous areas with little political competition.     

More than wishful thinking: Causes and consequences of voters’ electoral expectations about parties and coalitions

Accurate expectations about the outcome of elections play a central role in psychological and economic theories of voting. In the paper, three questions about voters’ expectations are investigated. First, we identify and test several factors that influence the overall accuracy or quality of voters’ expectations. Second, the phenomenon of “wishful thinking” is tested and confirmed for expectations about the electoral performance of individual parties and coalitions. Finally, two mechanisms how expectations might influence voting behavior are identified and tested. Based on surveys from Austria and Germany, the results suggest that voters not only rely on expectations to avoid casting “wasted” votes for parties without electoral chances, but that they are able to engage in fairly sophisticated strategic coalition voting.