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Huldrych Zwinglis frühste politisch-religiösen Schriften, «Das Fabelgedicht vom Ochsen» in Latein und Deutsch, sowie die Feldzugbeschreibung «De Gestis inter Gallos et Helvetios relatio» im Kontext des historischen Umfeldes und Huldrych Zwinglis innerer Entwicklung
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Finding groups with maximum betweenness centrality via integer programming with random path sampling
No full textOne popular approach to access the importance/influence of a group of nodes in a network is based on the notion of centrality. For a given group, its group betweenness centrality is computed, first, by evaluating a ratio of shortest paths between each node pair in a network that are “covered” by at least one node in the considered group, and then summing all these ratios for all node pairs. In this paper we study the problem of finding the most influential (or central) group of nodes (of some predefined size) in a network based on the concept of betweenness centrality. One known approach to solve this problem exactly relies on using a linear mixed-integer programming (linear MIP) model. However, the size of this MIP model (with respect to the number of variables and constraints) is exponential in the worst case as it requires computing all (or almost all) shortest paths in the network. We address this limitation by considering randomized approaches that solve a single linear MIP (or a series of linear MIPs) of a much smaller size(s) by sampling a sufficiently large number of shortest paths. Some probabilistic estimates of the solution quality provided by our approaches are also discussed. Finally, we illustrate the performance of our methods in a computational study
From ‹Me› to ‹We›: A Dyadic Perspective on Sexual Self-Esteem and Associations with Sexual Health and Sexual Dysfunction in Romantic Relationships
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Three novel pentavalent meningococcal vaccines
No full textInvasive meningococcal disease (IMD) is rare in travellers but associated with high mortality and long-term sequelae. Six serogroups (MenABCWXY) account for more than 90% of IMD. Three pentavalent vaccines are on the horizon: two MenABCWY, both with a 0-6 months schedule highly immunogenic and well tolerated, and one single-dose MenACWXY
