Direct and Indirect Xenophobic Attacks: Unpacking Portfolios of Identity

Political Behavior - Political threats are typically conceptualized by scholars as targeting particular groups of people. We call for also conceptualizing threats as political attacks directed...     

Colonization of diatoms in and on porcine bone substrate and considerations of diatom ecology for forensic science

The presence of diatom algae in bone marrow has been used as forensic evidence of drowning for several decades; however, these studies are based on known or suspected recent drowning events. This study addresses the potential for diatoms to enter the bone marrow of skeletal remains, that is, de-fleshed long bones post-mortem. In laboratory and field experiments, bones were either inflicted with two access points by a cut and acid pitting or left intact. The bones were submerged in water for at least 1 week and up to 3 months. Samples of the bone surface and marrow were inspected for diatoms. The analysis considered the time required for diatoms to enter marrow and whether genus characteristics like size or mobility affect entry. The presence of an access point influenced diatom entry in that bones without an introduced access point had zero to one diatom present in the marrow, whereas a bone with an access point had >150 diatoms present in the marrow. The results of both laboratory and field phases suggest that diatoms will reliably colonize bone in as quickly as 1 week, establishing and maintaining communities for at least 3 months. However, the bone surface assemblages differ from the source community. Bone marrow displayed even more restrictive access to diatom colonization, resulting in communities dominated by small raphid diatoms. Based on these findings, we suggest some caveats on the use of diatoms as trace evidence in forensic science with recommendations for future avenues of research.     

The management of domain irrelevant context information in forensic handwriting examination casework

That domain irrelevant context information can potentially bias human decision making processes is accepted in the psychological sciences. Although many forensic pattern examination sciences use human perceptual and cognitive processes almost exclusively to form opinions regarding evidence, we have been slow to engage with any procedure that might control for any potential effects associated with context information. The critics of pattern evidence have described how opinions may be unintentionally incorrectly formed and how bodies of evidential information might conspire to form cases where the sum of the totality of the evidence may be significantly more than its specialist parts. Given the body of evidence supporting the potentially serious implications of domain irrelevant information, it was decided to introduce a context management scheme at the Document Examination Unit of the Victoria Police Forensic Services Department. Existing laboratory wide evidence submission procedures were modified in the scheme such that, as far as was agreed to be practical, all handwriting cases were stripped of all but essential information for carrying out examination and comparison tasks. As yet no negative outcomes have been reported as a result of the scheme implementation.     

Estimating Environmental Costs

A database of environmental remediation costs is described as the response cost database (RCD). The database, which contains both capital and operating costs, includes 220 entries for complete activities ranging from studies to remedy components, such as caps, dredging, and pump and treat systems. Information and data sources for the RCD included actual costs from the literature, construction handbooks, and U.S. Environmental Protection Agency-approved software such as RACER. Costs were compared to benchmarks, such as from actual projects, when possible. Guidance on assumptions and scaling is provided with unit costs. The database was developed by environmental engineers experienced in the activities included and thus represents insightful estimation. The RCD may be useful for valuation of environmental portfolios or projects for planning, financial reporting, project management, financing, or mergers/acquisitions.     

Rational Irrationality and the Microfoundations of Political Failure

Models of inefficient political failure have been criticized forimplicitly assuming the irrationality of voters (Wittman, 1989,1995, 1999; Coate and Morris, 1995). Building on Caplan's (1999a,1999b) model of ``rational irrationality'', the current papermaintains that the assumption of voter irrationality is boththeoretically and empirically plausible. It then examinesmicrofoundational criticisms of four classes of political failuremodels: rent-seeking, pork-barrel politics, bureaucracy, andeconomic reform. In each of the four cases, incorporating simpleforms of privately costless irrationality makes it possibleto clearly derive the models' standard conclusions. Moreover, itfollows that efforts to mitigate political failures will besocially suboptimal, as most of the literature implicitlyassumes. It is a mistake to discount the empirical evidence forthese models on theoretical grounds.     

A CROSS-PACIFIC BRIDGE

<正>Sino-American educational relations need more impetus Despite mounting tensions in geopolitics and the global economic arena,Chinese President Xi Jinping’s recent meeting with U.S.President Donald Trump was not just a boon for the leaders of the world’s largest economies,it also signaled a tailwind for students who are investing time in forming links between the two countries.