试析反向代理服务器在高校校园网络中的应用

文章在分析代理服务器、反向代理服务器的原理和功能的基础上,根据高校校园网络应用需要,提出利用反向代理服务器解决外网合法用户访问校园网络资源的应用方案。     

浅谈变频调速技术及防雷

变频调速技术是20世纪90年代涌现出来的一种新的交流调速技术,现广泛应用于国民经济和人民生活的各个领域,文中阐述了变频调速技术的原理及防雷问题。     

微波衍生化和GC/MS/MS技术分析血、尿中的吗啡

目的建立了血、尿等生物检材中海洛因代谢产物吗啡的定性分析方法。方法以丙酸酐为衍生化剂,采用微波衍生化技术结合GC/MS/MS进行分析。结果当CID电压为0.9V时,衍生化物的母离子与子离子碎片信息丰富,碎片为m/e268、324、342。结论此方法科学、准确,灵敏度高,能满足吸食海洛因类、吗啡类毒品人员的生物检材的检验要求。     

Preliminary Study on Determining the Sequence of Intersecting Lines by Fluorescence Technique

The determination of the sequence of intersecting lines is an important part of questioned document examinations. A fluorescence technique was used to determine the sequence of heterogeneous intersecting lines produced using inkpad ink, stamp‐pad ink, ballpoint pens, gel pens, fountain pens, colorants of carbon paper, photocopiers, laser printers, and inkjet printers. A SteREO Discovery.V20 equipped with the ZEN Blue Lite software was chosen to perform the tests.As the results obtained from the study were positive under most conditions, the fluorescence technique was found to be very successful in determining the sequence of intersecting lines from ballpoint pen, gel pen, fountain pen, photocopier, laser and inkjet printers, and inkpad inks. The method was also successful in determining the sequence of intersecting lines from ballpoint pen, photocopier, laser printer, and stamp‐pad inks under most conditions. The technique was not successful in determining the order of crossing lines blending together.     

Drug Contamination of U.S. Paper Currency and Forensic Relevance of Canine Alert to Paper Currency: A Critical Review of the Scientific Literature

Several studies have reported on wide‐spread contamination of U.S. paper currency with cocaine and to a lesser extent other illicit drugs. Canines are trained and employed to search for and alert to drugs. Canine alert to currency has been used as evidence that currency has been directly involved in illicit drug trafficking to justify currency seizure and forfeiture. This assertion, particularly when the only evidence is based upon canine alert, has been challenged in the courts considering that most currency in circulation is contaminated with cocaine. Comprehensive review of the scientific literature establishes that (i) 67–100% of circulated U.S. currency is contaminated with cocaine ranging from a few nanograms to over one milligram/bill (ii) various biological and environmental parameters impact canine alert to drugs. It is concluded that canine alert to U.S. currency is not sufficiently reliable to determine that currency was directly used in an illicit drug transaction.     

Evaluation of Lip Prints on Different Supports Using a Batch Image Processing Algorithm and Image Superimposition

This study aimed to develop and to assess an algorithm to facilitate lip print visualization, and to digitally analyze lip prints on different supports, by superimposition. It also aimed to classify lip prints according to sex. A batch image processing algorithm was developed, which facilitated the identification and extraction of information about lip grooves. However, it performed better for lip print images with a uniform background. Paper and glass slab allowed more correct identifications than glass and the both sides of compact disks. There was no significant difference between the type of support and the amount of matching structures located in the middle area of the lower lip. There was no evidence of association between types of lip grooves and sex. Lip groove patterns of type III and type I were the most common for both sexes. The development of systems for lip print analysis is necessary, mainly concerning digital methods.     

Witnessing an Accidental Shooting at the Police Training Academy

Abstract

After an accidental shooting at a police training academy, outcomes of the class involved (n = 45) were compared with those of several comparison classes (n = 154) immediately and one year later. Results revealed a modest impact, but an increase in PTSD symptomology was observed from academy training to the one-year follow-up. Recruits in the affected class demonstrated more prejudicial attitudes toward women in law enforcement, perhaps because the shooter was a woman. The findings suggest that mistakes made by women within law enforcement may be generalized as stereotypes, and that further research is needed on the psychological impact of becoming a police officer.     

No fats,femmes, or Asians: the utility of critical race theory in examining the role of gay stock stories in the marginalization of gay Asian men

In the last few decades, proponents of critical race theory have uncovered everyday forms of injustice that continue to affect the lives of men and women of color by exposing the subtle forms of racism that exist in the stock stories told by the dominant group as well as the counterstories told by subaltern groups. However, rarely have we examined the stock stories articulated by subaltern groups to marginalize other subaltern groups. In this paper, I consider the stock stories told by gay White men and the counterstories expressed by gay Asian men to examine subtle forms of racism within the gay community. I argue that we need not only to reveal how the stories narrated by the dominant group continue to maintain social inequality, but that we also need to consider how subaltern groups help to maintain social inequality by adapting the language of the dominant group to use against other subaltern groups.     

Performance Evaluation in the Arts and Cultural Sector: A Story of Accounting at Its Margins

In this article, I present a review of financial and management accounting literature on the arts and cultural sector. My objective is to understand to what extent this literature is able to offer a critical perspective on the study of performance evaluation practices in arts and cultural organizations, as it is currently missing in the arts management literature. Adopting a critical perspective means shifting the focus of research from the technicalities of evaluation rules and procedures to their embodiment by the different organizational and societal actors of the arts and cultural sector.     

Innocent of the crime under investigation: suspects’ counter-interrogation strategies and statement-evidence inconsistency in strategic vs. non-strategic interviews

ABSTRACT

The study examines the counter-interrogation strategies applied by mock suspects (N?=?94), who are innocent of a mock crime under investigation but who were present at the scene, for different reasons, at around the time the crime occurred. Half were present at the crime scene to carry out a lawful act, the other half to carry out an unlawful act. Furthermore, this study examines the effect of the Strategic Use of Evidence (SUE) technique as a strategic interviewing technique (vs. a non-strategic technique), on suspects’ statement-evidence inconsistencies. Participants were randomly assigned to the two interview conditions (strategic vs. non-strategic) and were interviewed as suspects of a crime, which none of them had committed. The results show that the most commonly used counter-interrogation strategy in both groups was to be honest. However, 26.1% of the innocent suspects, performing an unlawful act, reported the strategy to be deceptive. In addition, the statements of suspects executing an unlawful act were significantly more inconsistent with the evidence in the strategic than the non-strategic interview condition. The increased statement-evidence inconsistency rates potentially put these suspects at risk of being assessed as guilty of a crime they did not commit.