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In the spring of 2014, some anti-Maidan protestors in southeast Ukraine, in alliance with activists from Russia, agitated for the creation of a large separatist entity on Ukrainian territory. These efforts sought to revive a historic region called Novorossiya (“New Russia”) on the northern shores of the Black Sea that was created by Russian imperial colonizers. In public remarks, Vladimir Putin cited Novorossiya as a historic and contemporary home of a two-part interest group, ethnic Russian and Russian-speaking Ukrainians, supposedly under threat in Ukraine. Anti-Maidan agitation in Ukraine gave way to outright secession in April 2014, as armed rebel groups established the Donetsk People’s Republic and Luhans’k People’s Republic on parts of the eponymous Ukrainian oblasts. Rebel leaders aspired to create a renewed Novorossiya that incorporated all of eastern and southern Ukraine from Kharkiv to Odesa oblasts. To examine the level of support for this secessionist imaginary in the targeted oblasts, our large scientific poll in December 2014 revealed the Novorossiya project had minority support, between 20 and 25% of the population. About half of the sample believed that the concept of Novorossiya was a “historical myth” and that its resuscitation and promotion was the result of “Russian political technologies.” Analysis of the responses by socio-demographic categories indicated that for ethnic Russians, residents of the oblasts of Kharkiv and Odesa, for older and poorer residents, and especially for those who retain a nostalgic positive opinion about the Soviet Union, the motivations and aims of the Novorossiya project had significant support.  相似文献   
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The detection of trace explosives is important for forensic, military, and homeland security applications. Detection of widely used nitroaromatic explosives (trinitrotoluene [TNT], 2,4-dinitrotoluene [DNT], picric acid [PA]) was carried out using photoluminescent metallole-containing polymers. The method of detection is through the quenching of fluorescence of thin films of the polymer, prepared by spray coating organic solutions of the polymer, by the explosive analyte. Visual quenching of luminescence (lambda(em) approximately 400-510 nm) in the presence of the explosive is seen immediately upon illumination with near-UV light (lambda(ex)=360 nm). Detection limits were observed to be as low as 5 ng for TNT, 20 ng for DNT, and 5 ng for PA. In addition, experiments with normal production line explosives and their components show that this technology is also able to detect composition B, Pyrodex, and nitromethane. This method offers a convenient and sensitive method of detection of trace nitroaromatic explosive residue.  相似文献   
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Police departments across the United States are now integrating new visual monitoring technology (e.g. unmanned aerial vehicles [UAVs or ‘drones’], body cameras) into routine police practices. Despite their potential use in multiple areas of proactive and reactive policing, public attitudes toward police use of UAVs, and visual monitoring technology overall, is mixed. As an extension of previous research, the current study uses a national survey to assess how well individuals’ perceptions about police legitimacy, effectiveness, and other criminal justice attitudes predict the level of public receptivity and opposition toward police UAV use in various contexts. The implications of these findings for public policy and law enforcement practices are discussed.  相似文献   
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Detection of trace quantities of explosive residues plays a key role in military, civilian, and counter-terrorism applications. To advance explosives sensor technology, current methods will need to become cheaper and portable while maintaining sensitivity and selectivity. The detection of common explosives including trinitrotoluene (TNT), cyclotrimethylenetrinitramine, cyclotetramethylene-tetranitramine, pentaerythritol tetranitrate, 2,4,6-trinitrophenyl-N-methylnitramine, and trinitroglycerin may be carried out using a three-step process combining "turn-off" and "turn-on" fluorimetric sensing. This process first detects nitroaromatic explosives by their quenching of green luminescence of polymetalloles (lambda em approximately 400-510 nm). The second step places down a thin film of 2,3-diaminonaphthalene (DAN) while "erasing" the polymetallole luminescence. The final step completes the reaction of the nitramines and/or nitrate esters with DAN resulting in the formation of a blue luminescent traizole complex (lambda(em) = 450 nm) providing a "turn-on" response for nitramine and nitrate ester-based explosives. Detection limits as low as 2 ng are observed. Solid-state detection of production line explosives demonstrates the applicability of this method to real world situations. This method offers a sensitive and selective detection process for a diverse group of the most common high explosives used in military and terrorist applications today.  相似文献   
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