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Johnson D 《Newsweek》2004,144(17):50
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Research into electoral participation has produced two traditions, one focusing mainly on individual level explanations while the second concentrates primarily on aggregate level explanations. By bringing these two research approaches together, we are not only able to explain individual electoral participation more thoroughly, but we also gain additional insight into the influence of aggregate level characteristics on individual behavior. We combine eight National Election Studies held in the Netherlands between 1971 and 1994 enabling us to study variation on the individual and the contextual (aggregate) level, including interactions between these two levels. Findings show that the addition of contextual characteristics form a significant improvement to an individual level model predicting electoral participation. Findings also confirm our expectation that the influence of individual characteristics such as education or political interest is dependent upon contextual characteristics describing for instance the salience of the election.  相似文献   
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Dactyloscopy is a special field in the police records department and a suitable means for identifying unknown dead persons as well as solving crimes by taking fingerprints from living persons. Apart from the conventional methods of dactyloscopy, mobile and more compact instruments are to facilitate taking prints of fingertips and palms also at the scene of mass disasters. In the presented study, living persons and corpses were examined to find out the possible uses and limits of mobile one-finger scanners. The concrete issue of the investigation was whether the mobile one-finger scanner Cross Match MV5 is suitable for application in mass disasters. The device was used in 12 corpses aged 5 weeks to 76 years (mean postmortem interval 5.5 days) and in 28 living persons aged 6 weeks to 87 years. In summary, the scanner produced qualitatively good prints in all age groups of the living individuals. In the corpses, the prints were only partly evaluable. In particular, fingers and fingertips with soot blackening and livid discoloration were difficult to analyse. Postmortem rigidity also complicated the handling of the scanner. In fresh corpses, the scanner can be recommended without reservation. Even if the epidermis was detached, the scanner was able to produce evaluable prints of the dermis of the hypothenar.  相似文献   
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Staging third molar development is commonly used for age estimation in subadults. Automated developmental stage allocation to the mandibular left third molar in panoramic radiographs has been examined in a pilot study. This method used an AlexNet Deep Convolutional Neural Network (CNN) approach to stage lower left third molars, which had been selected by manually drawn bounding boxes around them. This method (bounding box AlexNet = BA) still contained parts of surrounding structures which may have affected the automated stage allocation performance. We hypothesize that segmenting only the third molar could further improve the automated stage allocation performance. Therefore, the current study aimed to determine and validate the effect of lower third molar segmentations on automated tooth development staging. Retrospectively, 400 panoramic radiographs were collected, processed and segmented in three ways: bounding box (BB), rough (RS), and full (FS) tooth segmentation. A DenseNet201 CNN was used for automated stage allocation. Automated staging results were compared with reference stages – allocated by human observers – overall and per stage. FS rendered the best results with a stage allocation accuracy of 0.61, a mean absolute difference of 0.53 stages and a Cohen's linear κ of 0.84. Misallocated stages were mostly neighboring stages, and DenseNet201 rendered better results than AlexNet by increasing the percentage of correctly allocated stages by 3% (BA compared to BB). FS increased the percentage of correctly allocated stages by 7% compared to BB. In conclusion, full tooth segmentation and a DenseNet CNN optimize automated dental stage allocation for age estimation.  相似文献   
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This paper discusses the role of higher education institutions within the framework of the knowledge triangle between academic education, scientific research and innovation, as it has gained importance in recent years as a framework for innovation policies especially in the OECD and Europe. First, complementary concepts of universities’ outreach activities and extended role model such as ‘third mission’, ‘triple helix’, ‘entrepreneurial or civic university’ models and ‘smart specialization’ are reflected against their fit with the concept of the knowledge triangle, also with respect to new requirements for university governance. Second, a new understanding of spillovers between public sectors research and the business sector according to knowledge triangle is presented.

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Over the last decade, trade negotiations with Canada and the United States met with considerable resistance from non-governmental organisations (NGO). Moreover, the negotiation mandates given to the European Commission were so broad as to include topics falling under so-called mixed competence of the EU and the member states, necessitating not only ratification by the EU Council of Ministers and the European Parliament, but also member states’ parliaments. At some point, these two factors almost seemed to paralyze the EU as a trade negotiator. In the end, however, the EU concluded an agreement with Canada, renegotiated its agreement with Mexico (while also concluding agreements with Singapore and Japan amongst others), while negotiations with the US were suspended. Three factors can account for this puzzling combination of apparent incapacity and blockage and surprising resilience of EU trade policymaking. First, the NGO contestation campaigns did not muster pan‐European but rather only varying degrees of support. Second, in addition to scrutiny by the European Parliament, consensus decision-making in the Council fosters accommodation of the demands of all member states. This leads to a low degree of negotiating autonomy on the part of the European Commission, yet large bargaining power for the European Union, as long as the other side wants agreement. Finally, a recent ruling by the Court of the EU facilitated the decoupling of agreements on portfolio investment and investment arbitration (one of the most difficult hurdles), from all other matters of trade and regulatory cooperation, making it easier to reach agreement.  相似文献   
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Analyzing irregular international migration requires a border concept that can be integrated into the social sciences and migration theories. This article views borders as social institutions and considers irregular migration patterns in the Canary Islands from the 1990s as resulting from changes in border management introduced by Spain and the European Union. After the peak of irregular maritime arrivals in 2006, a multilayered deterrence strategy was implemented through increased border surveillance and externalization measures such as readmission agreements and policing the borders of transit countries. As a result, the Atlantic route from Africa to Europe has lost its importance as an alternative to the Mediterranean corridor.  相似文献   
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