Evaluation of canine training aids containment for homemade explosive and components by headspace analysis and canine testing

While canines are most commonly trained to detect traditional explosives, such as nitroaromatics and smokeless powders, homemade explosives (HMEs), such as fuel–oxidizer mixtures, are arguably a greater threat. As such, it is imperative that canines are sufficiently trained in the detection of such HMEs. The training aid delivery device (TADD) is a primary containment device that has been used to house HMEs and HME components for canine detection training purposes. This research assesses the odor release from HME components, ammonium nitrate (AN), urea nitrate (UN), and potassium chlorate (PC), housed in TADDs. Canine odor recognition tests (ORTs) were used with analytical data to determine the detectability of TADDs containing AN, UN, or PC. Headspace analysis by gas chromatography/mass spectrometry (GC/MS) with solid-phase microextraction (SPME) or online cryotrapping were used to measure ammonia or chlorine, as well as other unwanted odorants, emanating from bulk AN, UN, and PC in TADDs over 28 weeks. The analytical data showed variation in the amount of ammonia and chlorine over time, with ammonia from AN and UN decreasing slowly over time and the abundance of chlorine from PC TADDs dependent on the frequency of exposure to ambient air. Even with these variations in odor abundance, canines previously trained to detect bulk explosive HME components were able to detect all three targets in glass and plastic TADDs for at least 18 months after loading. Detection proficiency ranged from 64% to 100% and was not found to be dependent on either age of material.     

Web Content Management Systems: An Analysis of Forensic Investigatory Challenges

With an increase in the creation and maintenance of personal websites, web content management systems are now frequently utilized. Such systems offer a low cost and simple solution for those seeking to develop an online presence, and subsequently, a platform from which reported defamatory content, abuse, and copyright infringement has been witnessed. This article provides an introductory forensic analysis of the three current most popular web content management systems available, WordPress, Drupal, and Joomla! Test platforms have been created, and their site structures have been examined to provide guidance for forensic practitioners facing investigations of this type. Result's document available metadata for establishing site ownership, user interactions, and stored content following analysis of artifacts including Wordpress's wp_users, and wp_comments tables, Drupal's “watchdog” records, and Joomla!'s _users, and _content tables. Finally, investigatory limitations documenting the difficulties of investigating WCMS usage are noted, and analysis recommendations are offered.     

Australian opinion on international trade and the security link with the United States

In recent years, the Australian government has shifted the focus of its foreign economic and trade policies away from traditional practices and partners and onto Asia while simultaneously maintaining close diplomatic and defence ties with Washington. Using the results of the 1993 Australian Election Study survey, this note examines the place of public opinion in this continuing exercise. We find that although there is public support for increased trade with Asia, strong protectionist and pro‐alliance sentiments remain strong within the populace at large. These prevailing sentiments and their, albeit at this stage limited, interconnections could serve to complicate any push towards greater trade ties with its Asian neighbours.     

Against General Theory in Comparative Research

This paper argues against the search for a general theory of crime causation in comparative criminology. It includes a critique of two advocates of general theory, and offers three propositions which suggest appropriate strategies for theory construction in comparative research.     

Exporting and importing criminality: Incarceration of the Foreign Born

Since previous studies have found that crime rates vary by immigrant group there is a need to dis‐aggregate immigrants by country of birth in order to obtain a more accurate representation of the relationship between migrants and crime. This study examines data from six countries (Australia, Canada, France, Italy, the Netherlands, and the U.S.A.) on the country of birth of their inmate populations. The following observations are reasonable conclusions from the data available. First, the percentages of each home country's inmate population that is foreign‐born varies remarkably. Second, in general foreign‐born inmates tend to come from regions outside the region within which the host country was located, though in most cases from regions that were proximate. Third, given the small number of countries reporting, it is intriguing that just a small number of countries and regions can account for such a high proportion of a home country's inmate population if one includes the numbers of a country's citizens who are housed in foreign prisons as part of that original country's inmate population. The paper concludes with a discussion of a number of policy implications that flow from these findings.