Evaluation of Postmortem Bacterial Migration Using Culturing and Real‐Time Quantitative PCR

Postmortem bacteriology can be a valuable tool for evaluating deaths due to bacterial infection or for researching the involvement of bacteria in various diseases. In this study, time‐dependent postmortem bacterial migration into liver, mesenteric lymph node, pericardial fluid, portal, and peripheral vein was analyzed in 33 autopsy cases by bacterial culturing and real‐time quantitative polymerase chain reaction (RT‐qPCR). None suffered or died from bacterial infection. According to culturing, pericardial fluid and liver were the most sterile samples up to 5 days postmortem. In these samples, multigrowth and staphylococci were not or rarely detected. RT‐qPCR was more sensitive and showed higher bacterial positivity in all samples. Relative amounts of intestinal bacterial DNA (bifidobacteria, bacteroides, enterobacter, clostridia) increased with time. Sterility of blood samples was low during the studied time periods (1–7 days). The best postmortem microbiological sampling sites were pericardial fluid and liver up to 5 days after death.     

The Reliability of Swipe/Wipe Classification and Directionality Determination Methods in Bloodstain Pattern Analysis

Swipe and wipe are types of transfer patterns commonly encountered at bloodied scenes. So far, there have been little published data on the reliability of evaluating these patterns. In this study, 36 bloodstain patterns were randomly assigned to 12 analysts in three separate trials, and the analysts were required to evaluate the pattern type and directionality. The results revealed that correct classifications of patterns type were problematic, with an overall error rate of 32%. Wipes created from wet bloodstains were the most difficult to identify due to the absence of signs of alteration. The directionality of swipes made with a gloved finger had a 100% success rate; however, for swipes made with cloth, the analysts mistook the direction in nearly every case, which is of significant concern, considering these are common patterns at crime scenes. This study suggested there is a need for revising the current protocols for interpretation of these pattern types.     

Cheiloscopy: Lip Print Inter‐rater Reliability

Lip print analysis, or cheiloscopy, has the potential to join fingerprints and retinal scans as an additional method to determine human identification. This preliminary study sought to determine agreement among 20 raters, forensic odontologists, using an often referenced system that categorizes lip prints into six classes related to the dominant pattern of vertical, horizontal, and intersecting lines. Lip prints were taken from 13 individuals, and raters categorized eight distinct regions of each print. In addition to ratings made while viewing the actual prints, the raters repeated the exercise using photographs of the lip prints. Multirater kappa, a chance‐corrected measure of agreement, ranged between 0.15 for the actual prints and 0.25 for the photos, indicating only poor to fair levels of inter‐rater reliability. While these results fail to support the use of lip prints for human identification, it is possible that more intensive training may yet produce adequate levels of reliability.     

Quality of low secure services in the UK: development and use of the Quality of Environment In Low Secure Services (QELS) checklist

Low secure services provide care for psychiatric patients whose risk cannot be safely managed in other settings. The physical environment in these units plays an important role in supporting recovery and risk management. We developed the Quality of Environment in Low secure Services (QELS) checklist to assess the quality of the physical environment of these services. Using recommendations from previously published standards we piloted a draft checklist with a weighted scoring system reflecting the views of patients and providers. The checklist showed good criterion validity and inter-rater reliability. Data collected from 33 low secure services showed considerable variation in the quality of the physical environment. The QELS checklist provides an accessible and reliable means for managers and clinicians to assess whether the quality of the physical environment of low secure units meets recommended standards and can be used to support efforts to improve the quality of care delivered by these services.     

证据的采纳和采信从两个“证据规定”的语言问题说起

司法人员审查认定证据应该分为两个阶段，即证据的采纳和证据的采信。司法人员审查认定证据的内容应该包括“四性”，即合法性、关联性、真实性、充分性。采纳证据应该遵循带有一定刚性的规则；采信证据则应该依据带有一定弹性的标准。科学证据的采纳和采信具有一定的特殊性。     

精神病人限定刑事责任能力评定量表信效度多中心研究

目的对自行研制的《精神病人限定刑事责任能力评定量表》的信效度进行多中心研究。方法：在国内四地七家精神疾病司法鉴定机构取样,对被评定为限定责任能力的案例按量表手册进行评分,并与各中心鉴定专家按辨认能力和控制能力受损大小将限定刑事责任能力所作的三级划分进行比较。结果共纳入702例案例,根据专家意见限定责任能力分为三级：小部分责任能力组、部分责任能力组和大部分责任能力组。小部分、部分和大部分组量表均分分别为21.32±3.85、25.91±5.69和29.54±5.19,差异具有统计学意义;量表各条目与总分相关系数在0.27～0.61之间,再测信度为0.85,评分者一致性kappa在0.5～0.91之间;主成分分析提取六个因子,累积贡献率为67.26%,主要反映被鉴定人的作案预谋、作案动机、作案后的行为表现、反映精神疾病对被鉴定人自我状态和社会功能的影响、案发前被鉴定人面临的环境及其反应程度;判别分析显示,作案动机、对作案时间的选择性、作案后逃避责任、检验或审讯时伪装、对作案行为的罪错性认识、自知力损害和自控能力损害纳入判别式,回代正确率为62.3%。结论《精神病人刑事限定责任能力评定量表》构建合理,有较好的信效度。     

Events Data as Bismarck's Sausages? Intercoder Reliability,Coders' Selection,and Data Quality

Precise measurement is difficult but essential in the generation of high-quality data, and it is therefore remarkable that often so little attention is paid to intercoder reliability. It is commonly recognized that poor validity leads to systematic errors and biased inference. In contrast, low reliability is generally assumed to be a lesser concern, leading only to random errors and inefficiency. We evaluate the intercoder reliability of our recently collected data on governance events in UN peacekeeping and show how poor coding and low intercoder reliability can produce systematic errors and even biased inference. We also show how intercoder reliability checks are useful to improve data quality. Continuous testing for intercoder reliability ex post enables researchers to create better data and ultimately improves the quality of their analyses.     

绩效评估精确性及其影响因素分析

绩效评估在企业管理中起着至关重要的作用,而绩效评估的精确性又是确保绩效评估成功的关键.本文通过分析绩效评估精确性的衡量指标和影响绩效评估精确性的重要因素,提出了提高绩效评估精确性的具体对策.