Repeatability and reproducibility of comparison decisions by firearms examiners

In a comprehensive study to assess various aspects of the performance of qualified forensic firearms examiners, volunteer examiners compared both bullets and cartridge cases fired from three different types of firearms. They rendered opinions on each comparison according to the Association of Firearm & Tool Mark Examiners (AFTE) Range of Conclusions, as Identification, Inconclusive (A, B, or C), Elimination, or Unsuitable. In this part of the study, comparison sets used previously to characterize the overall accuracy of examiners were blindly resubmitted to examiners to assess the repeatability (105 examiners; 5700 comparisons of bullets and cartridge cases) and reproducibility (191 examiners of bullets, 193 of cartridge cases; 5790 comparisons) of firearms examinations. Data gathered using the prevailing AFTE Range were also recategorized into two hypothetical scoring systems. Consistently positive differences between observed agreement and expected agreement indicate that the repeatability and reproducibility of examiners exceed chance agreement. When averaged over bullets and cartridge cases, the repeatability of comparison decisions (involving all five levels of the AFTE Range) was 78.3% for known matches and 64.5% for known nonmatches. Similarly averaged reproducibility was 67.3%% for known matches and 36.5% for known nonmatches. For both repeatability and reproducibility, many of the observed disagreements were between a definitive and inconclusive category. Examiner decisions are reliable and trustworthy in the sense that identifications are unlikely when examiners are comparing non-matching items, and eliminations are unlikely when they are comparing matching items.     

Structural Reform of Local Government in Australia: A Sustainable Amalgamation Model for Country Councils

Abstract. Council amalgamation has always been the major policy instrument for structural reform in Australian local government. While the Australian literature has spawned taxonomic attempts at classifying models of structural change in local government, a serious deficiency in this body of work has been the specification of amalgamation as an undifferentiated category embodying the unconditional merger of many small local authorities into a single larger entity. This paper seeks to remedy this problem by developing a model of sustainable amalgamation and contrasting it with unconditional amalgamation in using a stylised example derived from four existing Western Australian country shires contemplating consolidation.     

The Federal State and the Breakup of Czechoslovakia: An Institutional Analysis

This article examines the breakup of Czechoslovakia from aninstitutionalist perspective. The federal state adopted afterWorld War I failed to accommodate tensions in society and heightenedethnic conflict. After World War II, an "asymmetrical" federationwas created that, while designed to provide a degree of homerule to Slovakia, further alienated Slovaksfrom national politics.Each effort to reform the federal order unintentionally promptednew concerns over the balance of political power. The inabilityto construct an enduring federal state helps explain why thetransition from communism proved fatal for the union that wasCzechoslovakia.     

Die EU-Außenkompetenzen im Schnittpunkt von Europarecht,Völkerrecht und nationalem Recht

Diese Arbeit zeigt, dass das System der Kompetenzverteilung zwischen EU und Mitgliedstaaten in den Au?enbeziehungen wesentlich durch den rechtlichen Grundgedanken der Verhinderung von Normkonflikten gepr?gt ist. Dieser Grundgedanke erkl?rt beispielsweise mit, warum bestimmte Kompetenzen als ausschlie?liche definiert sind bzw wann geteilte (ehemals konkurrierende) Kompetenzen in ausschlie?liche umschlagen. Dieser systembildende Aspekt ist auch tragend für die Reichweite der Zust?ndigkeit des EuGH für internationale Abkommen und für die Beantwortung der Frage, inwieweit diese judizielle Kompetenz den Zugang zu konkurrierenden (internationalen) Gerichten ausschlie?t.     

Cultural citizenship online: the Internet and digital culture

This paper explores connections between cultural citizenship and Internet-based media. It argues that engaging with cultural citizenship assists in moving debates beyond misleadingly narrow conceptions of the digital divide. It suggests that cultural citizenship invokes questions of access, visibility and cultural recognition, as well as tensions between intra- and inter-cultural communication online. The paper calls for a reflexive and critical research agenda which accounts for the ‘attention economy’ of the Internet and issues of cultural ethics online. The paper concludes that research and debate in this field must acknowledge ongoing tensions and contradictions between a postmodern ‘remix’ ethic in which the Internet serves as an open cultural archive which citizens can freely access and rework, on the one hand, and claims for cultural authorship, sovereignty and protection, on the other.