Comparison of morphological changes in white blood cells after death and in vitro storage of blood for the estimation of postmortem interval.

Estimation of the time of death is one of the most important problems for forensic medicine and law. Physical and chemical postmortem changes are evaluated together while estimating the time of death.In this study, in vitro storage and postmortem changes of white blood cells were aimed to be compared within the given postmortem interval, and a follow-up study was carried out. Blood smears which were obtained from 10 non-refrigerated cadavers (experimental group) and from 40 hospital patients (control group) have been evaluated to observe and compare changes during the in vitro storage and postmortem degenerative morphological changes that white blood cells undergo throughout the given postmortem intervals. The samples were examined by using a light microscope, and blood cells were differentiated by staining blood films with May-Grunwald stain, followed by Giemsa stain. Identifiable degenerated eosinophils and monocytes were first examined at 6h of death and the in vitro storage, and they were unidentifiable beyond 72 h of storage. Identifiable degeneration of neutrophils were first examined at 6h of death and storage while unidentifiable beyond 96 h of storage. Identifiable degeneration of lymphocytes were first examined at 24h of death, and they were still identifiable beyond 120 h.Cellular changes of leukocytes can be useful in the 6-120 h for estimating the time of in vitro storage, and the findings match during the first 21 h for both experimental and control groups. Finally, this follow-up study and the comparison will also be carried out for a longer postmortem interval, and other specific hypothesis that relate cellular changes in tissues other than blood with time since death are various points that needs to be studied.     

Informal Social Controls,Procedural Justice and Perceived Police Legitimacy: Do Social Bonds Influence Evaluations of Police Legitimacy?

Although procedural justice has been a key predictor of police legitimacy, recent findings illustrate that other factors influence this outcome (i.e., low self-control and ethnic identity). However, no research to date has evaluated whether individual-level informal social controls impact police legitimacy evaluations. Survey data are used to examine the influence of parental attachment, school commitment and procedural justice on perceived police legitimacy. While procedural justice significantly predicted legitimacy evaluations, no significant relationships were observed between parental attachment, school commitment and police legitimacy. The effects of procedural justice on legitimacy assessments, however, were modestly significantly moderated by parental attachment and school commitment. To maintain legitimacy, police officers should interact with citizens in procedurally fair manners. These results should also be of value concerning how parents and schools legally socialize adolescents.     

Evaluating the impact of Project Safe Neighborhoods (PSN) initiative on violence and gun crime in Tampa: does it work and does it last?

Journal of Experimental Criminology - Project Safe Neighborhoods (PSN) is an increasingly popular violence and gun crime prevention program which aims to identify prolific violent offenders, and...     

Modeling the effects of changing issue salience in two-party competition

For a given distribution of voter ideal points, candidates may compete, not only by changing their policy platforms, but also by seeking to persuade voters to place more weight on one of the given dimensions. We do not examine persuasion mechanisms, per se, but, rather, investigate how change of the salience weights can lead to alternation of majorities for the candidates, even though candidate positions remain fixed. Thus, competition over the salience of issue dimensions can, under certain circumstances, be crucial for determining election outcomes. We illustrate potential non-monotonicities in priming effects in terms of the Fourier series decomposition of the distribution of voter preferences, showing that the existence of higher-level harmonics leads to greater uncertainty about election outcomes and about best heresthetic strategies. We then demonstrate the empirical relevance of our results with data on two issue dimensions of political competition in the 2000 U.S. presidential election.     

Informing the Electorate? How Party Cues and Policy Information Affect Public Opinion about Initiatives

Citizens in representative democracies receive party endorsements and policy information when choosing candidates or making policy decisions via the initiative process. What effects do these sources of information have on public opinion? We address this important question by conducting survey experiments where citizens express opinions about initiatives in a real‐world electoral context. We manipulate whether they receive party cues, policy information, both, or neither type of information. We find that citizens do not simply ignore policy information when they are also exposed to party cues. Rather, citizens respond by shifting their opinions away from their party's positions when policy information provides a compelling reason for doing so. These results challenge the prominent claim in public opinion research that citizens blindly follow their party when also exposed to policy information. They also suggest that efforts to inform the electorate can influence opinions, provided that citizens actually receive the information being disseminated.     

The Effect of Providing Breakfast in Class on Student Performance

Many schools have recently experimented with moving breakfast from the cafeteria to the classroom. We examine whether such a program increases achievement, grades, and attendance rates. We exploit quasi‐random timing of program implementation that allows for a difference‐in‐differences identification strategy. We find that providing breakfast in class relative to the cafeteria raises math and reading achievement by 0.09 and 0.06 standard deviations, respectively. These effects are most pronounced for low‐performing, free lunch‐eligible, Hispanic, and low body mass index students. A lack of differences by exposure time and effects on grades suggest that these impacts are on test‐taking performance rather than learning. At the same time, the results highlight the possibility that measured achievement may be biased downwards, and accountability penalties may be inappropriately applied, in schools where many students do not consume breakfast.     

Virtual Tool Mark Generation for Efficient Striation Analysis,

This study introduces a tool mark analysis approach based upon 3D scans of screwdriver tip and marked plate surfaces at the micrometer scale from an optical microscope. An open‐source 3D graphics software package is utilized to simulate the marking process as the projection of the tip's geometry in the direction of tool travel. The edge of this projection becomes a virtual tool mark that is compared to cross‐sections of the marked plate geometry using the statistical likelihood algorithm introduced by Chumbley et al. In a study with both sides of six screwdriver tips and 34 corresponding marks, the method distinguished known matches from known nonmatches with zero false‐positive matches and two false‐negative matches. For matches, it could predict the correct marking angle within ±5–10°. Individual comparisons could be made in seconds on a desktop computer, suggesting that the method could save time for examiners.     

Tilting at Windmills: the Defamation Act 2013

In April 2013, the Defamation Act was passed, the culmination of a four‐year political campaign. The legislation is intended to ameliorate the ‘chilling effect’ of libel law on scientists, online commentators, NGOs, and others. This paper considers the main changes wrought: reform of the main common law defences, changes relevant to scientific discourse and online speech, and revisions that will impact on process. It identifies areas where there will be problems of interpretation for courts, and suggests that the Act will fail to provide clarity for publishers keen to assess the legality of their actions. The paper also contends that more attention should have been paid to remedies (in particular, the desirability of discursive remedies such as the right of reply). The question is posed whether the Act addresses the core problem with libel law: the juridification and over‐complication of public sphere disputes, and the attendant cost of embroilment in legal proceedings.     

The Truths/Fictions/Traumas of Marikana: Exploring Violence and Trauma in Three Films,The Marikana Massacre: Through The Lens (2013), Miners Shot Down (2014), and Night is Coming: A Threnody for the Victims of Marikana (2014)

ABSTRACT

By exploring three films that centre on the Marikana strikes and killings of 2012, I seek to examine both the representations of violence as trauma, and the trauma of representing violence, within the context of visual, cinematic texts. I position Marikana, and the trauma of Marikana, as both a highly significant moment, and also as representative of deeper social and political traumas and injustices. I ask whether and how these films create a narrative context for this pivotal moment in South African history. I also question the effects of cinematic style and genre in the depictions of trauma and violence. The institutional context in which each film originated and developed is important, and I argue that the audience's expectations of the genre of documentary film also play a significant role in the way in which the films process trauma. I situate my paper in conversation with previous articles by Lucy Graham and Helene Strauss among others, that deal with cinematic portrayals of Marikana. By examining the selected films alongside each other, and through the lens of Decolonial Trauma Studies, I hope to elucidate the ways in which these South African films deal with and work through trauma.