Decaying Mouse Volatiles Perceived by Calliphora vicina Rob.‐Desv.

Volatiles emitted by decaying human remains are in the focus of recent research. The identification of core volatiles in this field is of high importance, because cadaveric volatiles generally show high variation. In this study, the volatile profiles of five mice (Myodes glareolus) were sampled with charcoal filter tubes from their time of death until advanced decay. Eleven compounds were quantitated by means of gas chromatography–mass spectrometry. Electroantennographic experiments with female Calliphora vicina antennae led to the identification of dimethyl trisulfide, dimethyl disulfide, nonanal, hexan‐1‐ol, 1‐octen‐3‐ol, 3‐methylbutan‐1‐ol, and heptanal as electrophysiologically active compounds. When these were compared, dimethyl trisulfide (17 ng/μL) and dimethyl disulfide (11 ng/μL) were found to be emitted in higher concentrations. The roles of these compounds and nonanal as core volatiles for cadaver detection or postmortem time determination and their correlation to the stages of decay and the accumulated degree days are discussed.     

Family Group Conferencing and Re‐Offending Among First‐Time Juvenile Offenders: The Indianapolis Experiment

Restorative justice processes, and family group conferences in particular, have become increasingly common in justice system practices across the globe. There has also been significant scholarly interest. Yet, with several notable exceptions, much of the research has been characterized by relatively weak designs, and questions related to the impact of family group conferences on re‐offending remain unanswered. This research is intended to begin to address these issues. The study is based on an experiment conducted in Indianapolis, Indiana whereby young, first‐time‐offending youths were randomly assigned to either a family group conference or one of a number of court‐ordered diversion programs. Nearly 800 youths participated in the experiment, and the cases were tracked for 24 months following their initial arrest. Survival analysis techniques were used to compare prevalence patterns of re‐offending among the treatment and control groups. The results indicated a significant difference between the two groups with the control group experiencing higher rates of failure (re‐offending). The differences were most pronounced during the period of 3–8 months following the initial arrest. Incidence rates were also compared. Assignment to the treatment group was negatively related to incidence of offending. Given the consistent finding of victim benefits in restorative justice processes, the results suggest that conferences hold promise as an effective intervention, at least for young first‐time offenders, and warrant continued experimentation.     

甲卡西酮类新型策划毒品的危害及其检测

甲卡西酮类策划药物是近年出现的新型毒品,在世界范围内已经形成滥用趋势。在介绍甲卡西酮类策划毒品的结构、性质及作用的基础上,对于其滥用现状、危害性和检测方进行了综述,以期对建立复杂生物检材中痕量甲卡西酮类策划毒品的高灵敏检测方法有所助益,对研究甲卡西酮类毒品的毒性作用、体内代谢过程及戒断机制提供参考和依据。     

Determination of average vehicle speed utilizing reverse projection

Reverse projection photogrammetry has long been used to estimate the height of an individual in forensic video examinations. A natural extrapolation would be to apply the same technique on a video to estimate the speed of an object by determining the distance traveled between two points over a set amount of time. To test this theory, five digital video recorders (DVRs) were connected to a single fixed camera to record a vehicle traveling down a track. The vehicle's speed was measured through Doppler radar by a trained operator and the speedometer of the vehicle was also recorded with a video camera. The recorded video was examined and the frames that best depict the beginning and end of the vehicles course were selected. Two reverse projection photogrammetric examinations were performed on the selected frames to establish the position of the vehicle. The distance between the two points was measured, and the time elapsed between the two points was examined. The outcome provided an accurate speed result with a standard degree of uncertainty. This study proves the feasibility of using video data and reverse projection photogrammetry to determine the speed of a vehicle with a limited set of variables. Further research is needed to determine how additional variables would impact the standard degree of uncertainty.     

论纳税人诚实推定权的入法途径

诚实推定权由纳税人财产权与人格尊严权衍生而来,在立法中加以确认有助于落实税收法定、践行量能课税和提高纳税人遵从度。诚实推定权借鉴了刑法上的无罪推定和民法上的善意推定,其基本内涵是税务机关认为纳税人有少缴税款嫌疑时,应由该机关承担举证责任,证明强度应达到优势证据标准。我国应在修改《税收征收管理法》时,明确表达纳税人享有诚实推定权,同时准确界分纳税人的协力义务和税务机关的举证责任,强调逃税行为必须具备主观故意的要件,合理限定税收检查权。诚实推定权入法将对税收征纳实践产生影响,提高现有“计税依据明显偏低”的认定标准,使纳税人的正当理由诉求更有可能被认可,对逃税行为的界定也将更为精确。     

Timing is everything: a quantitative study of presidentialist regime dynamics in Eurasia, 1992–2016

Why do some countries with presidentialist constitutions feature more political closure than others at a given time? A quantitative study of post-Soviet countries since independence finds that much of the observed variation in political closure reflects timing, or the particular point at which a country happens to be within a regime cycle, rather than structural or other factors usually cited to explain regime change. Specifically, how much time a president has had to coordinate rivalrous networks around his or her authority is at least as strong a predictor of the level of regime closure as are economic development, economic growth, resource rents, proximity to Europe, and key cultural factors, even when controlling for the level of closure in the preceding year. This pattern is not found among countries with divided-executive constitutions, indicating it is related to the constitution rather than a general phenomenon.     

The British general election: Synthetic forecasts

Election forecasting work, in Britain and elsewhere, has been confined mainly to traditional approaches – statistical modeling or poll-watching. We import a new approach, which we call synthetic modeling. These models, developed out of forecasting efforts from the American 2012 presidential election, we are currently testing in a comparative European context. In this exercise, we apply the strategy to forecasting British general elections, in particular the upcoming 2015 contest. These synthetic forecasts come from hybrid models blending structural knowledge with contemporary public opinion. We generate ongoing nowcasts, from six months prior, to one month before, Election Day itself.     

Brain Fluid Content Related to Body Position and Postmortem Interval – An Animal Model

Adult male Sprague Dawley rats were euthanized and placed in a horizontal or vertical (head‐down) position at room temperature, after which brain fluid content was measured by a moisture analysis technique at variable time points. No significant difference in brain fluid content was observed between horizontal and vertical postmortem positions. A significant increase in brain fluid content was demonstrated 3, 6, and 24 h after death, with maximal fluid content observed at 24 h. Specifically, the brain fluid content of control animals was 77.79 ± 0.36%, increasing to 80.05 ± 0.22% at 24 h (p < 0.0001). This study has demonstrated no significant differences in brain fluid content related to postmortem position, suggesting that a head‐down position is not associated with increased brain fluid content or swelling. However, significant temporal increases in brain fluid content after death, most likely related to cerebral liquefaction, occur.     

液化石油气中毒死亡兔的法医病理学研究

目的观察新西兰兔在液化石油气中毒后不同组织的病理学特征,探讨其在日常法医鉴定工作中的应用价值。方法健康新西兰兔42只,随机分为3组:轻度中毒组6只,中毒死亡组30只,窒息死亡组6只。在中毒和致死过程中进行行为学观察,分析心血中液化石油气浓度,中毒死亡组和窒息死亡组进行大体解剖形态学和组织病理切片观察及心血检验。结果轻度中毒组在吸入少量液化石油气后会表现为呼吸加快、站立、伸舌、磨牙等兴奋的状态;中毒死亡组尸体解剖主要表现皮肤、肌肉呈土黄色,气管、支气管出血明显,肺气肿明显;中毒死亡组心血中可检验出液化石油气成分。结论新西兰兔液化石油气中毒的特征主要表现为皮肤、肌肉呈土黄色,气管、支气管出血明显,心血可检出液化石油气成分。我们推断液化石油气的神经毒性与缺氧可能是液化石油气中毒死亡的机制。