The need to securely share information on an ad-hoc basis between collaborating entities is increasingly becoming important. We propose a coalition based access control model (CBAC), comprised of three layers: coalition, role and user-object. Our model enables translation of coalition level policies to implementation level access control in a manner similar to that of the layers of the TCP/IP p...

The distributed, heterogeneity, and dynamic nature of the coalition context has raised the need for new advanced technologies. These technologies aim at managing the coalition informational infrastructure, in terms of autonomy, adaptability, and scalability. To achieve this support, Software Agents (SAs) seem to be a promising approach. To develop this approach, different aspects of a coalition...

This paper studies the stability of the coalition government formed in 1993 in Japan, called the Hosokawa government, by using a dynamic coalition formation model presented in Fukuda and Muto [2]. Ono and Muto [6] studied the stability of the same coalition government by applying the static coalition formation model of Hart and Kurz [4], which employed Owen’s [7] coalition value to measure part...

We take a cross-layer optimization approach to study energy efficient data transport in coalition-based wireless sensor networks, where neighboring nodes are organized into groups to form coalitions and sensor nodes within one coalition carry out cooperative communications. In particular, we investigate two network models: (1) many-to-one sensor networks where data from one coalition are transm...

Abstract While information exchange is essential in the policy process, little known about how divergent subgroups filter actors’ technical and political exchange, blocking learning processes. Guided by social identity, group entitativity, self-categorisation theories, we introduce concept measurement of identity-based referring to informal clusters shaped self-referent perception similarities ...

OBJECTIVE To explore the relationship between polymorphisms of XbaI and MspI loci of apolipoprotein B (ApoB) gene and -75 bp, +83 bp loci of apolipoprotein AI (ApoAI) gene and coronary heart disease (CHD) in Kazaks of Xinjiang Uyghur Autonomous Region, China. METHODS These loci were analyzed by PCR-restriction fragment length polymorphism (PCR-PFLP). Two hundred and five patients with CHD and...

Policy-making is a dynamic process in which policies can be changed in each period but continue in the absence of new legislation. We study a dynamic legislative bargaining game with an endogenous status quo where in each period a dollar is allocated with a proposal voted against the allocation in the previous period. We characterize for any initial status quo a class of simple Markov perfect e...

Strategy process and practice research has illuminated the internal dynamics of strategy work – at cost backgrounding processes practices that relate to engagement with external actors. In this conceptual paper, we argue for an extension body by shifting focus from towards externally oriented engagement. We do so critically building on military literature develop concept as This suggests unders...

In coalition formation with self-interested agents both social welfare of the multi-agent system and stability of individual coalitions must be taken into account. However, in large-scale systems with thousands of agents, finding an optimal solution with respect to both metrics is infeasible. In this paper we propose an approach for finding coalition structures with suboptimal social welfare an...