Metrological framework for selecting morphological characters to identify species and estimate developmental maturity of forensically significant insect specimens

Accurate age estimates of immature necrophagous insects associated with a human or animal body can provide evidence of how long the body has been dead. These estimates are based on species-specific details of the insects’ aging processes, and therefore require accurate species identification and developmental stage estimation. Many professionals who produce or use identified organisms as forensic evidence have little training in taxonomy or metrology, and appreciate the availability of formalized principles and standards for biological identification. Taxonomic identifications are usually most readily and economically made using categorical and qualitative morphological characters, but it may be necessary to use less convenient and potentially more ambiguous characters that are continuous and quantitative if two candidate species are closely related, or if identifying developmental stages within a species. Characters should be selected by criteria such as taxonomic specificity and metrological repeatability and relative error. We propose such a hierarchical framework, critique various measurements of immature insects, and suggest some standard approaches to determine the reliability of organismal identifications and measurements in estimating postmortem intervals. Relevant criteria for good characters include high repeatability (including low scope for ambiguity or parallax effects), pronounced discreteness, and small relative error in measurements. These same principles apply to individuation of unique objects in general.

Key points

• Metrological rigour can increase in forensic entomology by selecting measurements based on their metrological qualities.
• Selection of high-quality features for morphological identification of organisms should consider these criteria: (1) pronounced discreteness of features (minimising group overlap or maximizing interval); (2) high repeatability of assessment (such as symmetrical width rather than asymmetrical length); (3) small relative error in measurement (selecting the physically largest continuous rigid feature for measurement).
• These metrological principles also apply to individuation of unique objects in general.

     

Distribution of the Minutiae in Hypothenar Palm Prints in Slovak Adults: Indications for Personal Identification

Minutiae are small distinguishing features found along every ridge flow, which make each friction ridge print unique. The most common friction ridge prints found at the crime scene are fingerprints; therefore, the most of the minutiae studies are focused exactly on this kind of prints. The authors believe that further examination and enlargement of the palm print database could result in better use of the palm prints for personal identification. We analyzed a total of 160 palm prints from 40 females and 40 males aged between 18 and 70 years from Slovakia. For the evaluation of the minutiae, the area of the hypothenar had to be marked out. The classification of the minutiae used for this study was based on a modified version of the classification system using the total of 13 types of minutiae. The frequency of every minutiae type was calculated and, using the chi-square test with Yates's correction, bilateral and sex differences were assessed. The relationship between the different types of minutiae was examined with Pearson's correlation test. During the initial phases of the identification process, the focus should be on the least common types of minutiae (Y or M and return), which were found not to correlate; thus, their mutual occurrence is random (e.g., overlap—Y or M, crossbar—return, or Y or M—dock). The results of the present study show which specific minutiae types are the most suitable for personal identification. These findings may be beneficial in more effective outcome of the identification process.     

南非关联船认定及其应对措施

关联船的认定方式有两种:直接证明式和间接证明式.对于直接证明式的举证,我们要向法院说明我国国有企业的独立法人地位,中国政府对国有企业只有行政管理,不存在商业意义上的控制.对于间接证明式的举证,要淡化索赔人所列举的确实存在的关联因素,驳斥其列举的不存在的关联因素.     

紫外导数光谱法鉴别透明胶带

通过对200余种透明胶带紫外导数光谱分析,确定了最佳分析条件,验证了分析方法的重现性和稳定性。分析了不同胶带紫外导数光谱产生变化的原因,证明紫外导数光谱法是一种快速、简单、可靠、实用的鉴别透明胶带来源的方法。     

《毒品识别与检验》实验教学体系创新性探索

目前公安教育普遍面临着实验教学体系薄弱的现状,在教学中为培养具有综合能力和创新能力的禁毒警察,改变现阶段禁毒民警业务知识薄弱的现状,我院禁毒学专业对“毒品识别与检验”实验教学体系进行改革,进行创新性教育的探索。     

Sectoral linkages at the beginning of the 21st century: The role of Polish economy in global production structures

This paper provides a first attempt in analyzing the role of Polish economy in the production structure of the global economy in the early years of the 21st century. For the purpose of this analysis, we propose a new approach in which two most important aspects of interindustry linkages in a global input-output model are examined. Contrary to previous studies focused on output-oriented key sector analyses in post-communist CEE economies, we focus on a fundamental policy target variable – income per gross output. In order to analyze the issues in question in a dynamic framework, the empirical results are based on the 2000 and 2014 global intercountry input-output tables for the 28 EU countries as well as 15 other major countries in the world.     

新冠肺炎疫情期间公安法医应当加强尸体甄别和个体防护

因鉴定体制特点,公安法医除参与尸体有关的现场勘查工作外,还需进行尸体检验工作。在此过程中,可能面对很多风险,受伤和中毒等事件时有发生。然而,国内公安法医对新冠肺炎等传染病流行期间死亡的尸体如何甄别进行尸体检验鉴定,对现场勘查及尸体检验工作的防护只有少量规定,且内容不够详尽。本文对法医在现场勘查中遇到的尸体及尸体检验中实验室建设、职业现状、风险评估及防范措施等进行了论述。最后,建议出台相关的制度规定等具体约束规范措施,以保障公安法医现场勘查及尸体检验工作的顺利进行,以解除基层鉴定机构和鉴定人的后顾之忧。     

文化融入策略与恐怖组织的认同

恐怖组织的认同构建过程可分为三个阶段：个体恐怖分子在群体中找到自我、组织内部同一性的构建以及组织一致对外的恐怖主义活动。在整个认同构建过程中,始终贯穿着恐怖组织内外群体文化融入策略选择的矛盾,具体表现为：第一阶段,潜在恐怖分子在主流文化中认同受挫,转而寻求加入恐怖组织。第二阶段,恐怖组织以自身所处的宗教文化为基础,构建其组织文化,并积极通过各种方式加深组织成员对这一文化的认同,但与此相对,恐怖组织外群体却很难认同其组织文化。第三阶段,恐怖组织内外群体文化融入策略选择的矛盾持续激化,最终导致恐怖组织采取一致对外的恐怖主义活动。通过“伊斯兰国”作为案例,对上述恐怖组织的认同过程进行分析后发现,“伊斯兰国”的“成功”是与其“成功”的文化融入策略密切相关,而其在阿富汗的受挫,在很大程度上也是由于文化融入策略“失当”所导致的,即“伊斯兰国”在阿富汗不但无力完成与塔利班的竞争,而且无法解决组织面临的跨文化冲突问题。因此,在打击“伊斯兰国”等暴恐极端势力时,关注文化融入策略的影响并有针对性地采取对策,具有重要意义和价值。     

跨文化视野下台湾原住民的族群认知与“族称”

台湾原住民的“族称”演变,是两千年来以“汉番（原汉）”关系为主轴的跨文化互动与认知的反映。由于台湾原住民缺乏本民族自身的文献历史,族群历史的被动记忆保留在异文化的文本中,从汉唐宋明时期“化外”接触中的“夷”、“番”,清代“理番教化”中的“生（野）番”与“熟（化）番”,日据时代“皇民化蕃政”下的“生蕃”与“高砂族”九族,光复以来“山地行政”下的“山胞”十族,从笼统、概括的“统称”到各族群的识别与相应“族称”,都是它文化视野下的认知符号。最近一段时期以来,“原住民运动”过程中“正名”的“原住民”十四族,则潜伏着来自原住民族群以外的“台独”政治用力。