Fatal penetrating abdominal injury by a metallic projectile

Penetrating abdominal injury is often a life-threatening condition, which is mainly associated with inflicted injuries. Fatal self-inflicted sharp force abdominal injuries too have been reported in the literature. Inadvertent penetrating abdominal injuries are a rarity and are caused by sharp objects of low-velocity and often nonmissile-type. A 27-year-old male factory worker was brought dead to the emergency department with an alleged history of sustaining abdominal injury by a sharp metal projectile while working on a metal cutting grinder. Autopsy observations were consistent with the history of inadvertent penetrating injury. Our case reports a fatal missile-type inadvertent sharp force trauma over the abdomen with intestinal perforation, a relatively uncommon scenario in occupational/workplace settings. The present case report describes the significance of the death scene visit and corroborating the medical findings with investigating agencies. This case further emphasizes on the need for adopting proper safety measures at the workplace.     

Lethal small bowel obstruction due to pica

Up to 25% of institutionalized patients with cognitive deficiencies display pica-like behavior, with an estimated annual incidence of small bowel obstruction of 2%. We present a case based on the forensic autopsy of a 41-year-old woman who died as a result of a missed diagnosis of small bowel obstruction after ingesting a foreign body. The case underlines the importance of precaution when treating patients with cognitive deficiency and/or language deficits and gastrointestinal symptoms. In such cases, it is important to employ a liberal threshold for radiological investigations and, if possible, obtain a medical history from a person close to the patient.     

浅谈侵犯网络游戏虚拟财产的责任承担

随着网络游戏业的迅猛发展，侵犯网络游戏虚拟财产的案件出现得更为频繁，矛盾愈发激化，然而当前我国法律法规还没有对如何保护网络游戏虚拟财产权利作出具体规定。为了建立和完善网络游戏虚拟财产权利的保护机制，有必要对网络游戏虚拟财产的法律属性及权属作出界定，同时厘清用户与网络游戏运营商之间的责任承担。     

虚拟价值链的理论与应用

本文详述了虚拟价值链的思想 ,并尝试构建出虚拟价值链的一般理论模型 ,从而解决了企业在信息时代的竞争中缺少战略指导的缺陷。通过论述虚拟价值链和传统价值链的关系 ,本文指出了虚拟价值链模型的适用范围 ,并提出了企业应用这一模型进行竞争的基本原则和方法。     

Spleen and portal lymphnode pathology in fatal drug addiction

Spleen and portal lymphnode sections from 86 drug addicts submitted for medico-legal autopsy at the Institute of Forensic Medicine in Copenhagen in the year 1979 were studied together with tissue sections from 24 "normal" persons. In 70% of the drug addicts the spleen weight was more than 200 g, and in 71% portal lymphnode hyperplasia was found. Birefringent foreign material was found in spleen tissue of drug addicts in 72% and in portal lymphnode tissue in 44%. Signs of antigen stimulation in both spleen and portal lymphnode tissue evaluated by the number of germinal centre and plasma cells were found in more than 80% of the drug addicts compared with about 20% of the "normal" persons. The results were related to anamnestic information of duration of drug abuse, to the spleen weight, to the occurrence of birefringent material and to the liver changes. Examination of lysozyme and immunoglobulin containing cells using the indirect preoxidase technique was performed in a total of 72 cases of spleen tissue, 59 cases of portal lymphnode tissue from drug addicts, 24 cases of spleen tissue and 18 of portal lymphnode tissue from "normal" persons. Lysozyme, IgM and IgG containing cells were found significantly more often among drug addicts than "normal" persons. The results indicate that the splenomegalia and the portal lymphnode hyperplasia often found in drug addicts are caused by continuous antigen stimulation due to repeated injections of various antigens.     

影响网络学习的因素探析

网络教学作为教学组织形式越来越引起人们的重视.虚拟环境、虚拟教师和学生三者共同构成网络教育的三体,它们对学生的网络学习有较大的影响.     

论网络虚拟幸福

网络虚拟幸福是指在网络虚拟环境中主体需要得到满足时所产生的愉悦感。根据网民上网目的分析有两种虚拟幸福,一种是真实的虚拟幸福,一种是虚幻的虚拟幸福。     

论大数据技术对公安工作的影响

大数据具有的4V特性决定了大数据技术将从多个角度和层面丰富侦查方式,提高了各类案件的侦破效率;以高科技预防高科技犯罪,做到打击迅速、减少损失,还百姓以现实的安全感;整合多种资源,引导社会运转,预见行为规律,构建令百姓满意的和谐治安环境;让公安工作始终开展的公正透明,百姓享有现实与虚拟环境里的平等权利;提供高效的管理手段和模式,不断推动社会管理的创新。全面认识大数据技术对公安工作的影响,有利于推动公安工作上台阶,不断实现新的突破。     

Virtual anthropology: a preliminary test of macroscopic observation versus 3D surface scans and computed tomography (CT) scans

Virtual anthropology (VA) is based on applying anthropological methods currently used to analyse bones to 3D models of human remains. While great advances have been made in this endeavour in the past decade, several interrogations concerning how reliable these models are and what their proper use should be remain unanswered. In this research, a fundamental assumption of VA has been investigated: if the way we perceive and apply an anthropological method is truly similar when looking at bones macroscopically and through various 3D media. In order to answer, 10 skulls of known age and sex were scanned using a computed tomography (CT) scanner and a 3D surface scanner. Two observers separately applied a defined staging method to eight suture sites on these skulls, first looking at the bone macroscopically, then at the 3D surface scan, and finally on the CT scan. Two rounds of observation were carried out by each observer. Intra- and inter-observer error were evaluated, and two sample t-tests used to evaluate if the different types of medium used yielded significantly different observations. The results show a high degree of inter-observer error, and that data obtained from 3D surface scans differ from macroscopic observation (confidence level 95%, P ≤ 0.05). CT scans, in these settings, yielded results comparable to those obtained through macroscopic observations. These results offer many possibilities for future research, including indications on the kind of anthropological methods and anatomical landmarks that might be reliably transferable to the virtual environment. All current methods used in traditional anthropology should be tested, and if they prove unreliable, new techniques to analyse bones from virtual models should be developed.

Key points

• Large discrepancies between observation on dry bones and computer-generated 3D models (surface scans or CT scans) could lead to the re-evaluation of the suitability of traditional anthropological methods for application on 3D models.
• This preliminary study evaluates whether macroscopic, 3D surface scans, and CT scans viewings generate different observations.
• The results indicate that the data are not always coherent across all three media of observation.
• Explanations include the aspect given to the bone by the 3D software, differences between handling bones in real life versus on a computer, and level of expertise of the observers.

     

关于构建公安院校虚拟实验室的几点思考

随着我国高等教育体制改革的不断深入,高等院校的实验教学出现了越来越多的难题,建立虚拟实验室是解决其中难题的一种有效方法。文章根据虚拟实验室的相关定义,结合虚拟实验室的功能特点和公安院校实验室的实际情况,对公安院校虚拟实验室的构建进行探讨。