Craniometry and mathematical calculations as a method for viscero-cranium profile determination

The aim of this work is to prove the application of craniometry in determining the identity of unknown bodies. There is a great correlation between the viscero-cranium appearance and the osseous structure, the said correlation following mathematical rules and thus being possible to be calculated. Various segments of the skull and different size of the angles they make with each other are directly responsible for the graphic profile of viscero-cranium. The nasal bones and their angle are the basis to determine the shape and size of the nose.     

IBM correcting selectric typewriter: an analysis of the use of the correctable film ribbon in altering typewritten documents.

From the point of view of a document examiner, the advent of the Correcting Selectric typewriter has not changed any of the procedures ordinarily used in the examination of altered typewritten material. The same precautions should be observed in conducting examinations of such material as would be observed in making examinations for any other type of possible alteration on negotiable instruments. The security question raised with the Correcting Selectric is no different than the questions raised when an eraser was put on a pencil or a chemical bleach was found to remove ink on paper. The Correcting Selectric might even be compared to the introduction of ball-point pens on the market in the late 1940s. At that time, financial publications were suggesting that ball-point pens should not be used on any negotiable or valuable document as the ink was considered to be too readily transferable, and it was thought that they left little in the way of individual writing characteristics. However, it was not long before financial institutions were supplying such pens on their counters. Because of the complexities involved in using the Correcting Selectric to alter a document, it is felt that such problems will prove to be less prevalent than those involving other means of alterations.     

论法医学鉴定文书

编者按：法医学是为法律服务的一门自然科学，其提供服务是通过鉴定实现的。鉴定在法医学，乃至法庭科学中占有极为重要的位置。然而，由于我国在司法鉴定立法方面很不完善，以及其他众所周知的原因，致使有关法医学鉴定的理论发展缓慢，很不系统，这不仅影响专业教育培养职业鉴定人，而且，也不利于充分发挥法医学鉴定的服务职能。为此，我们提出创建“法医鉴定学”，作为法医学的分支学科。法医鉴定学所涉及的内容较为广泛，其学科框架尚难明确界定。我刊从本期开始设“法医鉴定学”专题栏目，本期两篇文章，旨在抛砖引玉，特别是通常所称…     

Hair analysis to document a clinical case of TCDD over-exposure

Dioxins and related compounds (furans) are persistent environmental contaminants that cause adverse biological effects. Their influence on humans is still unclear, except for accidental high-dose exposure. Chronic exposure to these compounds seems to be involved in cancer, endocrine disruption and neurobehavioral effects. For several years, a large concern about the potential health risks of dioxins is emerging in Europe and United States. The case of a 50-year-old man victim of an acute over-exposure to tetrachloro dibenzo-p-dioxin (TCDD or Seveso dioxin) is reported here with particular focus on hair investigations. The developed method involved the decontamination of the hair strand using picograde level methylene chloride, the homogenization of hair segments with scissors and their extraction in presence of 13C12-marked dioxin congeners under reflux of toluene using a Soxhlet, 8h at 130 degrees C. After reduction of the toluene fraction to 1 ml and addition of purification marker (37Cl4-2,3,7,8-TCDD), dioxins purification was achieved using three successive columns: silica, alumina/sodium sulfate and carbon/Celite columns. Finally, the toluene eluent was evaporated and the extract injected in the analytical system. After chromatographic separation, detection was achieved in single ion monitoring mode using a high resolution mass spectrometer operating in electron impact ionization mode (40 eV, minimal resolution of 10,000). The analysis of the first hair segment (0-6 cm) revealed the presence of 2,3,7,8-TCDD at 65 fg/mg when the distal one remained negative (LOQ=0.3 fg/mg). All other congeners (n=16) were in the range of those determined in the general population (0.62 and 0.89 fg/mg in the two hair segments, respectively). The extremely low dioxin levels generally found in hair specimens (low fg/mg range) lead us to analyze them using the very sensitive and specific gas chromatography-high resolution mass spectrometry apparatus. From the best of our knowledge, this is the first case of over-exposure to Seveso dioxin through hair analysis reported in the literature.     

利用数字图像处理技术伪造文件的研究

介绍了利用数字图象处理技术剪贴伪造文件、变造签名、彩色打印伪造原始印文和签名等三种伪造文件的方法及其特点.数字图象处理技术能够克服许多传统伪造方法的"缺点",使伪造的文件达到较高的逼真度.讨论了数字图象处理技术的滥用引发的新问题.     

论法医学鉴定文书

概述 一、法医学鉴定文书的概念及其种类 法医学鉴定文书,是指法医学鉴定人接受委托和在检验、鉴定过程中形成的各种规范性文字、数据和图片(像)资料,以及根据检验所见和鉴定结论制作的书面报告的总称,也可以简称为法医学文书.关于法医学鉴定文书的名称问题,在传统法医学中仅见介绍过"法医学鉴定书”一词,而法医学鉴定书是法医学鉴定文书的一种.另外,我国法学界和司法部门使用的"诉讼文书(有称司法文书和法律文书)”与法医学鉴定文书的关系尚需进一步探讨,但诉讼文书中也涉及法医学鉴定文书的内容. 根据法医学鉴定文书的作用、特点,可以将其分为以下几类(如图示),该分类主要包括三个方面,鉴定程序和过程的文字记录;鉴定书;鉴定结论签发手续和应用反馈.     

The use of a method of mathematical analysis in establishing the species affiliation of animal hair

Quantitative content of 10 trace elements in hair of 9 species of animals was determined by atomic-absorbtion spectroscopy. Analysis of the resulting digital data using discriminant algorithm makes it possible to determine species and sex of an animal by trace element content of hair.     

The response of the Intoxilyzer 4011AS-A to a number of possible interfering substances

Five Intoxilyzer 4011AS-As were tested for their response to eleven chemicals and one mixture of chemicals. The air/water partition ratios were also determined for these eleven chemicals and one mixture. The chemicals tested and their approximate partition ratios were the following: acetaldehyde (190:1), acetone (341:1), acetonitrile (578:1), isoprene (1:1), isopropanol (1671:1), methanol (3229:1), methylene chloride (11:1), methyl ethyl ketone (229:1), toluene (5.5:1), 1,1,1-trichloroethane (14:1), trichloroethylene (20:1), and a 50:50 mixture of 1,1,1-trichloroethane and trichloroethylene (14:1). Of the eleven chemicals and one mixture studied during this experiment, only three, isopropanol, toluene, and methyl ethyl ketone, could reasonably interfere with the test, and then only under unusual circumstances--those circumstances being a slight additive effect to a breath ethanol concentration near the level required for prosecution. Any substantial additive effect from these three substances would illuminate the interference light which invalidates the test. The mean illumination point of the interference light was 0.0286 g/210 L for methyl ethyl ketone, 0.0294 for toluene, and between 0.0116 and 0.0292 for the apparent alcohol concentration for isopropanol, depending on the amount of isopropanol metabolized to acetone. Even with these unusual circumstances considered, the Intoxilyzer 4011AS-A must be viewed as an effective way of determining the ethanol concentration in human breath for evidential purposes.     

法治的基本要件:从法

动态的法治的最基本的启动和维持力量是治者从法.法治的真正治者是人,不是法律,所谓"法律的统治"不过是语言逻辑上的一种虚构.从法的主体对于法律是主动的、积极的,而法律对于从法主体是去向的.以主动、积极为特点的从法具有治的创造力.主要表现在:创生新法,扩展法律的治域;改善法律,培育良法;奉行法律,确保法律的有效实施.     

防止文件泄密和计算机反取证方法初探

目的研究防止文件泄密和计算机反取证的方法。方法文件粉碎既是保护文件安全和防止保密数据泄漏的有效方法,也是计算机反取证技术的方法之一。通过分析磁盘文件中存放和删除数据的原理,采用彻底删除和文件粉碎技术。结果可以应用于敏感数据的安全保密和提取,也有助于拓展计算机取证技术的工作思路。     

Comparison of the elemental composition of office document paper: evidence in a homicide case

Fraudulent substitution of a page within a multiple page document such as a will or business contract, the counterfeit manufacture of paper banknotes, and linking ransom or extortion notes have all been the focus of criminal investigations at one time or another. In a recent homicide investigation, document examiners were requested to compare a threatening letter received by a business partner of the deceased with paper samples seized under warrant from a suspect's house. Through a quantitative elemental analysis of the concentrations of nine elements (Na, Mg, Al, Mn, Sr, Y, Ba, La, and Ce) within the questioned and specimen documents, determined by inductively coupled plasma-mass spectrometry (ICP-MS), it was concluded that (i) the paper of the threatening letter originated from a different source to that of the paper seized from the suspect's house and (ii) all six pages of paper seized from the suspect's house originated from the same source. This discrimination of paper is presented as both a statistical t-test analysis (99.9% confidence limit) as well as construction of an elemental fingerprint for individual replicates within the questioned and specimen sample populations. This is the first reported use of the comparison of the elemental composition of document paper, determined by ICP-MS, to assist in a criminal investigation.     

The work the document does: research, policy, and equity in health

At the center of the politics of health equity, in many countries and circumstances, stands a signal report of research. This article is concerned with what might be described as the architecture of such documents, including how they are produced and organized and the relationships they demonstrate with others that parallel, precede, and succeed them. The article examines how scientific and political authority is established and comments on the evidence of cross-national learning that these documents reveal. It discusses differences in how the problem of health equity is constructed in different countries and how research findings are converted into policy recommendations. It begins to trace a process of implementation by noting how these documents are referred to and written about. The argument is that the politics of health equity are expressed or realized in the documents and reports, which are its principal vehicle. This is not to claim that there is no world beyond the text or that the world somehow is a text, but that to fully understand that world we must understand the text and the work it does.     

The use of a 3-D laser scanner to document ephemeral evidence at crime scenes and postmortem examinations

Proper documentation of physical evidence at both crimes scenes and postmortem examination is crucial for downstream analysis, interpretation, and presentation in court. Ephemeral or transient evidence poses particular challenges to investigators, as its very nature renders it difficult or impossible to seize and maintain in its original physical state. The use of a hand-held three-dimensional (3-D) laser scanner is proposed to capture and document such evidence, both in the field and at autopsy. Advantages of the scanner over traditional means of documentation such as photography or casting include the ability to obtain measurements in all dimensions, the ability to reconstruct missing elements, and the ease with which generated images can be interpreted by the jury at trial. Potential scenarios warranting the use of the scanner are identified, and the limitations of its use are discussed.     

The determination of cocaine in hair: a review

The explosion of literature related to the analysis of hair for cocaine and its products is reviewed. In the commonly accepted applications of hair testing for cocaine, those related to criminal or civil investigations and pharmacotoxicologic studies occupy most of the relevant published work. This review uses detailed, ‘binary’ (yes/no) tables to demonstrate trends in the literature, and allows researchers and caseworkers quick access to the literature most important for answering a variety of questions.     

Missing a critical piece of the pie: simple document search strategies inadequate for systematic reviews

A review based on a biased collection of studies is likely to produce biased conclusions. As such, a central component of a quality systematic review is a comprehensive document search. Three issues are explored in this paper that underpin the importance of such a search. First, the evidence of publication selection bias clearly establishes that peer-reviewed journal articles are more likely to show statistically significant results than less formally published studies. Second, the presence of grey literature studies that cannot be discovered through a search of bibliographic databases is demonstrated using Campbell Collaboration systematic reviews, and third, the logical and empirical problems with using publication status as a proxy for methodological quality are examined. More robust methods of identifying research conducted in the social sciences are needed if we are to take seriously the accumulation of knowledge, such as the development of a priori registries of research studies.