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Master data management (MDM) is a topic of increasing prominence both in the scientific and in the practitioners’ information systems (IS) community. As a prerequisite for meeting strategic business requirements, such as compliance with regulations, business integration, or integrated customer management, MDM comprises numerous activities. One of the central activities is designing and maintaining the master data architecture. Interestingly, though, the scientific community has remained almost silent with regard to the question as to how companies should proceed when designing the master data architecture. In order to shed light on this unexplored topic, the paper at hand presents the findings of a case study at Bosch Group. The case study shows that designing the master data architecture is a multidimensional task which requires balancing the interests of various organizational stakeholders, managing an array of technical opportunities, and meeting requirements of numerous master data classes. Also, the case study suggests that taking advantage of architectural design patterns may be an appropriate way to adequately address the complexity of the task.  相似文献   
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Identifying and understanding predictors of school safety perceptions is important due to its consequences for students. However, it is not clear what school‐related factors most contribute to explaining students’ perception of school safety, and how they relate to community‐related factors such as neighborhood safety. The purpose of this study was to understand the factors associated with Chilean elementary and middle school students’ perceptions of school safety. We used a sample of 5,455 students from low socioeconomic status public schools, and analyzed the predictive value of peer physical and verbal victimization; teacher and school staff victimization; teacher's social support; and perception of safety in the students’ neighborhoods on perceptions of school safety. Findings showed that although different forms of school violence, particularly peer physical victimization and physical and sexual victimization from teachers and school staff, contribute to students’ perception of school safety, the highest contribution came from students perceiving their neighborhoods as unsafe. In contrast, teacher social support contributed to increased levels of perceived school safety. We discuss the need for school‐based interventions that address physical victimization and engage teachers in prosocial and less punitive approaches to foster a positive and safe school climate, and in fostering school–community partnerships.  相似文献   
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Abstract

This article examines the current governance structures in international competitive snowboarding and analyses empirically how key actors operate within the diverging logics that shape such structures. We expand upon the existing literature on professional snowboarding by offering a more contemporary understanding of the constantly evolving processes of institutionalization. Qualitative data was gathered from the authors’ first-hand experiences with international snowboarding, based on (1) interviews with system insiders, (2) document analysis, and (3) participant observations. Two dominant and contradicting logics of competitive snowboarding were identified, forming a fragmented, dual institutional structure that we call the industry-based and nation-based governance model. Our findings suggest that recent professionalization processes have led to defragmentation efforts, thus signalling a shift towards a nation-based governance focus. Therefore, we conclude that other action sports that will join the Olympics, such as surfing and skateboarding, are advised to find solutions for mediating inherent contradictions of governance logics to avoid institutional fragmentation at an early stage.  相似文献   
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Recently, extremely large benzenoid hydrocarbons have been synthesized. These compounds resemble graphite in many ways, and have been named graphenes. Because of their nonstandard properties, graphenes have already found numerous applications, especially as special-purpose materials in electronics. In this article we outline the basic chemical facts on graphenes. Ivan Gutman is Professor of Physical Chemistry at the Faculty of Science, Kragujevac, Serbia. Among his interests are mathematical methods in chemistry and the theory of polycyclic aromatic compounds. Boris Furtula is secretary of the journal ‘MATCH Communications in Mathematical and in Computer Chemistry’.  相似文献   
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