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.     

Different Threats,Different Militaries:Explaining Organizational Practices in Authoritarian Armies

Why do some states generate competent, professional military organizations, while others fail to do so even when they have the required economic, demographic, and technological endowments? Variation in states’ military organizational practices—their core policies related to promotion patterns, training regimens, command arrangements, and information management—holds the key. This article develops a typology of such practices and explains why and how they vary in response to the internal and external threats facing particular regimes. The article then subjects this argument to a carefully designed plausibility probe comparing the threat environments and military organizational practices of two states whose differences are both intuitively and theoretically puzzling: North and South Vietnam during the period 1954–1975. The initial evidence provides support for the theory and casts doubt on existing explanations of military organizational behavior focused on external threats, democracy, or the degree of political intervention in the military. The findings have important implications for foreign policy, as well as for future research on authoritarianism, civil-military relations, and military effectiveness.     

The Role of Interface Shape on the Impact Characteristics and Cranial Fracture Patterns Using the Immature Porcine Head Model, ,

The forensic literature suggests that when adolescents fall onto edged and pointed surfaces, depressed fractures can occur at low energy levels. This study documents impact biomechanics and fracture characteristics of infant porcine skulls dropped onto flat, curved, edged, and focal surfaces. Results showed that the energy needed for fracture initiation was nearly four times higher against a flat surface than against the other surfaces. While characteristic measures of fracture such as number and length of fractures did not vary with impact surface shape, the fracture patterns did depend on impact surface shape. While experimental impacts against the flat surface produced linear fractures initiating at sutural boundaries peripheral to the point of impact (POI), more focal impacts produced depressed fractures initiating at the POI. The study supported case‐based forensic literature suggesting cranial fracture patterns depend on impact surface shape and that fracture initiation energy is lower for more focal impacts.     

Exploring the Sequential Lineup Advantage Using WITNESS

Advocates claim that the sequential lineup is an improvement over simultaneous lineup procedures, but no formal (quantitatively specified) explanation exists for why it is better. The computational model WITNESS (Clark, Appl Cogn Psychol 17:629–654, 2003) was used to develop theoretical explanations for the sequential lineup advantage. In its current form, WITNESS produced a sequential advantage only by pairing conservative sequential choosing with liberal simultaneous choosing. However, this combination failed to approximate four extant experiments that exhibited large sequential advantages. Two of these experiments became the focus of our efforts because the data were uncontaminated by likely suspect position effects. Decision-based and memory-based modifications to WITNESS approximated the data and produced a sequential advantage. The next step is to evaluate the proposed explanations and modify public policy recommendations accordingly.     

Half the Spectrum: A Title IX Approach to Broadcast Ownership Regulation

In theory, the electromagnetic spectrum belongs to everyone. In practice, stations owned by men hold approximately 90% of the licenses to broadcast on the public spectrum in the United States. In order to address this problem, federal legislation should be adopted that mimics the framework of Title IX of the Education Amendments of 1972 by prohibiting broadcast media companies from discriminating based on gender. Instead of the federal funds received by colleges and universities, the federal benefits here are the potentially lucrative broadcast licenses select radio and television stations receive. Under the proposed legislation, broadcasters would be required to establish gender parity within their organizations or risk losing their license to operate on the public spectrum.     

Public Support for Democratic Governance in Southeast Asia

Abstract

The transition and consolidation of democracy in Southeast Asia has proven fragile and tenuous some 30 years after the current wave of democratization began. A critical ingredient in the process of democratization is the role of public opinion and the extent that the public supports the democratic ‘rules of the game’. This study uses 2006 and 2007 public opinion data from the AsiaBarometer Survey of six Southeast Asian countries (Indonesia, Malaysia, the Philippines, Thailand, Cambodia and Singapore) to examine popular perceptions of democracy and democratic principles and practices. Specifically, it seeks to shed light on the following interrelated questions: Do democratic institutions in Southeast Asia work well in the short and long term? To what extent are citizens in these countries satisfied with various political and civil freedoms? Do citizens trust specific institutions to operate in the best interests of their society? Does the current political system and government perform well?     

"The red zone": temporal risk for unwanted sex among college students

The "red zone" usually refers to the first few weeks of the first semester at college, when female students are believed to be at greatest risk for experiencing unwanted sex. We tested this notion using data from a survey study of 207 first-and second-year students (121 women, 84 men) at a small, liberal arts university. Results demonstrated only one significant elevation in incidence rates of first- and second-year women's unwanted sexual experiences (sexual touching, attempted and completed anal, oral, and vaginal sex), between the end of the first month and fall break (mid-October) during the second year at school. Previous research and local information about the relevant behaviors of sorority and fraternity members is discussed in light of these findings to provide heuristic material for further empirical testing. Because risk may involve both temporal and situational factors, systematic collection and dissemination of local data are recommended.     

Federal reserve appointments and the politics of senate confirmation

Public Choice - This paper examines the politicization of Federal Reserve (Fed) appointments. In contrast to the extant appointment literature’s almost exclusive focus on ideological...