PRVEP P100潜伏时、空间频率阈值与视敏度关系法医学探讨

目的通过研究眼损伤后不同空间频率下阈刺激时图形翻转视觉诱发电位(PRVEP)相关指标与视敏度之间的关系,试图探讨运用视觉诱发电位推算视敏度的方法及价值。方法对四川大学华西医院眼科门诊钝性眼外伤病例81眼以及正常对照眼(199眼)进行图形翻转视觉诱发电位检查,采用不同空间频率的刺激产生视觉诱发电位波,记录各阈刺激时P100潜伏时与波幅。采用统计学方法描述检测结果,并进行线性相关与回归分析。结果阈刺激空间频率(X)与视敏度的对数值(Y)之间关系密切,可以通过建立两者之间的相应回归方程用以推算视敏度;各组阈刺激时PRVEP P100潜伏时(X)与视敏度(Y)的对数值存在较好相关性。结论建立相应的回归方程推算视敏度是一种较客观、准确的方法,在常规眼科检查的基础上,有利于客观、准确地评定视功能障碍。     

A motion detection-based framework for improving image quality of CCTV security systems

Closed-circuit television (CCTV) security systems have been widely used in banks, convenience stores, and other facilities. They are useful to deter crime and depict criminal activity. However, CCTV cameras that provide an overview of a monitored region can be useful for criminal investigation but sometimes can also be used for object identification (e.g., vehicle numbers, persons, etc.). In this paper, we propose a framework for improving the image quality of CCTV security systems. This framework is based upon motion detection technology. There are two cameras in the framework: one camera (camera A) is fixed focus with a zoom lens for moving-object detection, and the other one (camera B) is variable focus with an auto-zoom lens to capture higher resolution images of the objects of interest. When camera A detects a moving object in the monitored area, camera B, driven by an auto-zoom focus control algorithm, will take a higher resolution image of the object of interest. Experimental results show that the proposed framework can improve the likelihood that images obtained from stationary unattended CCTV cameras are sufficient to enable law enforcement officials to identify suspects and other objects of interest.     

监控录像图像伪造手法及其特征综述

随着监控录像设施越来越多，在诉讼中使用监控录像作为证据的案件也越来越多。使用伪造或变造的监控录像的案件也有发生，本文提出了伪造监控录像图像的几种不同手法，并分析了不同伪造手法图像所表现的特征。     

浅析监视居住制度的缺陷及对策

监视居住是一种刑事强制措施。由于立法方面的先天不足，导致在司法实践中公安司法机关很少适用这一刑事强制措施。监视居住成了刑事强制措施体系中的“鸡肋”。随着《中华人民共和国刑事诉讼法》的修改列入全国人大的立法计划，监视居住这一强制措施的存废问题引起了法学界和司法实务界的广泛关注。     

Establishing Likelihood Ratios for Patterned Garment Comparisons from Seam Measurement Data,

It is often challenging to ascribe an objective measure of confidence for identifications based on surveillance imagery from a crime scene. The present work seeks to address this deficiency in the case of garment comparison evidence by developing a quantitative method for establishing a conservative lower bound on the likelihood ratio (LR) for identifications involving patterned garments. The method is based on statistical analysis of pattern offset measurements taken from a sample of garments of the same type (manufacturer, style, and size) as the seized evidence. The developed analysis framework was demonstrated on different types of garments over a range of modeled surveillance imaging scenarios with variable image quality; the lower bounds on the LRs ranged from approximately 10–1 to over 400–1. The statistical model was tested and validated through a large‐scale empirical study involving both simulated and human observer‐performed garment comparisons.     

我国网络舆论监督的法律文化分析

互联网自20世纪90年代中期开始在我国推广,经过20年左右的发展,已经成为社会生活中的新兴信息传播媒体,和传统媒体一样,互联网对以政府为主导的社会公共事务的正常运转,起到重要的监督作用.通过法律文化视角对这种网络舆论监督机制进行审视,并对目前网络舆论监督中存在的一些问题进行分析,有助于加快社会主义法治建设的历史进程.     

特别重大贿赂犯罪适用指定监视居住问题研究

根据新修订的《刑事诉讼法》第73条的规定,检察机关在查处涉嫌特别重大贿赂犯罪时,可以在侦查阶段对犯罪嫌疑人适用指定监视居住的强制措施.在肯定检察机关适用指定监视居住措施必要性的前提下,侦查机关在具体运用该措施时应当在坚持其适用原则的基础上,准确领会立法精神,重点把握指定监视居住的适用条件、适用场所、监督机制等问题,从而在司法实践中将该措施的良性效益发挥到最大.     

Screens in the sky: SAGE,surveillance, and the automation of perceptual,mnemonic, and epistemological labor

This essay investigates the centrality of the U.S. Military in the process of automating the labor of surveillance. The creation of Semi-Automatic Ground Environment (SAGE), an anti-nuclear defense system developed in the 1950s, marked the computerization of the perceptual, mnemonic, and epistemological labor that is necessary for surveillance and is emblematic of screening technologies. The essay situates SAGE in a long history of military surveillance that depended upon media technologies. Building upon the work of Michel Foucault and Freidrich Kittler, it is argued that media are essential for understanding how surveillance is problematized for security.     

初论指定监视居住必要性审查机制构建

《中华人民共和国刑事诉讼法》第73条对指定监视居住制度进行了规定,同时在第73条第4款规定了“人民检察院对指定监视居住的决定和执行是否合法实行监督”。《人民检察院刑事诉讼规则（试行）》第110条至第128条,对检察机关决定的指定监视居住的必要性审查做了规定,但对于审判机关、公安机关决定或者批准的指定监视居住的必要性审查制度没有涉及,从保护人权和国家法制统一的层面来说,我国的指定监视居住必要性审查机制在启动、审查范围等方面存在需要进一步完善的地方。     

The effects of closed-circuit television on crime: meta-analysis of an English national quasi-experimental multi-site evaluation

This article reports results obtained in an English national quasi-experimental multi-site evaluation of 14 closed-circuit television (CCTV) projects in residential areas, town and city centers, a city hospital, and car parks (parking lots). Both police and victimization data were collected before and after the installation of CCTV in target, control and buffer areas, and police Divisions. The results showed that CCTV was effective in reducing crimes in train station car parks but not in city centers or residential areas, seemed to be effective in reducing vehicle crimes (but not other types of crimes), and was most effective when the degree of coverage by CCTV was high and when CCTV was combined with other interventions such as improved lighting. Implications for situational crime prevention theory are drawn. There was no evidence of displacement or diffusion of benefits. It is concluded that CCTV needs to be implemented more effectively, based on an analysis of the crime problem and its causes, and needs to be evaluated using a randomized experimental design.