Fluorescence of a Natural Fluorophore as a Key to Improve Fingerprint Contrast Image

The optical and morphological properties of resveratrol were investigated. This nontoxic fluorescent natural material, emitting in the visible blue light, was used as an optical marker, enabling the enhancement of the image contrast coming from relief pictures marked on challenging surfaces. By applying appropriated imaging softwares, this marker was verified to be very useful in the latent fingerprint recognition deposited on different wood surface types, mainly those with high level of roughness, where conventional forensic materials do not allow effective fingerprint image visualization.     

Analysis of STR loci in Cartagena, a Caribbean city of Colombia

Allele frequencies, together with some parameters of forensic interest were estimated for nine STRs included in the AmpF/STR Profiler kit (CSF1PO, D3S1358, D5S818, D7S820, D13S317, FGA, TH01, TPOX and vWA) in a sample of 215 unrelated individuals from Cartagena (Colombia). For all loci, no significant deviations from Hardy-Weinberg equilibrium were observed. Comparative analysis results between our data and those from other Colombian and African population samples revealed significant differences, except with two Colombian Caribbean Coast sub-regions.     

Analysis of Δ-tetrahydrocannabinol in oral fluid samples using solid-phase extraction and high-performance liquid chromatography–electrospray ionization mass spectrometry

An analytical method using solid-phase extraction (SPE) and high-performance liquid chromatography–mass spectrometry (LC–MS) has been developed and validated for the confirmation of Δ⁹-tetrahydrocannabinol (THC) in oral fluid samples. Oral fluid was extracted using Bond Elut LRC-Certify solid-phase extraction columns (10 cm³, 300 mg) and elution performed with n-hexane/ethyl acetate. Quantitation made use of the selected ion-recording mode (SIR) using the most abundant characteristic ion [THC + H⁺], m/z 315.31 and the fragment ion, m/z 193.13 for confirmation, and m/z 318.00 for the protonated internal standard, [d₃-THC + H⁺]. The method proved to be precise for THC, in terms of both intra-day and inter-day analyses, with coefficients of variation less than 10%, and the calculated extraction efficiencies for THC ranged from 76 to 83%. Calibration standards spiked with THC between 2 and 100 ng/mL showed a linear relationship (r² = 0.999). The method presented was applied to the oral fluid samples taken from the volunteers during the largest music event in Portugal, named Rock in Rio-Lisboa. Oral fluid was collected from 40 persons by expectoration and with Salivette^®. In 55% of the samples obtained by expectorating, THC was detected with concentration ranges from 1033 to 6552 ng/mL and in 45% of cases THC was detected at concentrations between 51 and 937 ng/mL. However, using Salivette^® collection, 26 of the 40 cases had an undetectable THC.     

Inward-Looking Policies, Institutions, Autocrats, and Economic Growth in Latin America: An Empirical Exploration

This paper explores the institutionaldeterminants of economic growth in LatinAmerica by taking advantage of recentempirical research that employs subjectiveand objective measures to test for apossible “Northian” explanation that linksinstitutional quality and economic growth.We explore a simple framework that may helpbetter understand the policymakers’ choicesand persistence regarding inward-lookingpolicies that were pursued between the1930s and the 1980s by arguing that in theLatin American case Olson’s (1982) idea ofencompassing interest should be expanded tocover not only the economic stakes of powerholders, but in particular, their psychicincome which includes their politicalstakes, along the lines of recent work byRobinson (1997), Coyne (2002), andothers.     

非洲联盟面临的挑战

非洲面临最重要的挑战就是如何避免并解决冲突,恢复和巩固和平。持久和平是非洲应对其他挑战的先决条件。非洲联盟的建立显示出非洲人民应对挑战的决心,其目标就是要消除贫困,维护和平,使非洲各国走上经济持续发展的道路。中国是最早向莫桑比克提供援助的国家之一,非洲国家视中国为伙伴和盟友,中非合作的前景广阔。     

Unarmed Utopia Revisited: The Resurgence of Left-of-Centre Politics in Latin America

This paper seeks to examine the extent to which left-wing forces are making a comeback in Latin America and to draw out the political implications of their political ascendancy. It argues that while left-of-centre parties have developed a persuasive critique of the failures of liberal democracy and economic neoliberalism in the region, there is as yet no conceptual clarity or distinct policy initiatives materialising from the left's promises of deepening democracy and implementing an alternative economic model. When in power, left-of-centre parties have followed a strategy of 'bending and moulding' existing political institutions and the free-market economic model rather than attempting radical political and economic reforms. This paper concludes that left-of-centre parties are right in accepting that there is little room in the region for an anti-systemic model and that instead the emphasis should be placed on making states, markets and democracy work better to secure development, address social demands and attack the root causes of discrimination and inequality. But leaving behind old certainties and adapting to the new political and economic environment has come at the cost of a loss of intellectual confidence, ideological clarity and weakened identities.     

Police Drones and the Air: Towards a Volumetric Geopolitics of Security

The paper explores the aerial dimension of policing and surveillance. It does so by drawing upon select results from a large‐scale survey conducted in 2017 among professional (public and private) drone users in Switzerland. Focusing in particular on the police, the paper shows that the technology not only generates novel ways of looking down from above, but also of looking up from below, thus instilling a kind of air‐mindedness among the police. In making the airspace explicit as an object, and stake of imaginaries, concerns and practices, drones mediate novel ways of relating to the air, understanding it, approaching it and acting in relation to it.     

Fiscal Decentralization Policies in the EU: A Comparative Analysis through a Club Convergence Analysis

Abstract

We study the degree of convergence or divergence in fiscal decentralization in the European Union over the period 1995–2015 using a club convergence approach. First, we analyze non-central expenditure and revenue as percentages of GDP, of total expenditure and of total revenue. The results for the EU-15 countries indicate some clustering, with three clubs formed when using GDP and four to five when using total revenue or expenditure. Second, we study the gap between expenditure and revenue as a proxy of fiscal responsibility. This results in three and two clubs respectively, with Denmark as the divergent country with the highest gap. Finally, we analyze potential unions of clubs and transitions. We also interpret our results taking into account variables found in the literature as determinants of fiscal decentralization. These results show how European countries are quite heterogeneous in terms of fiscal federalism and decentralization, with greater convergence in fiscal responsibility than in the other magnitudes.