Shinji Kikuchi

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Server virtualization technologies and their live migration function contribute to the utilization of the computing resources in cloud datacenters. However, many management operations for virtual machines (VMs) including live migrations can be evoked by many cloud users at anytime. The outburst of executions of live migration operations can deteriorate(More)
Policy-based management is drawing attention as a solution to managing today's complex information systems. To be dependable, a policy-based system must be able to check the validity of a policy written by administrators. However, common test methods such as operations tests in a test scenario and simulations cannot check whether systems with given policies(More)
We present a tool-supported framework for the efficient reverification of component-based software systems after changes such as additions, removals or modifications of components. The incremental verification engine at the core of our INcremental VErification STrategy (INVEST) framework uses high-level algebraic representations of component-based systems(More)
Once failures occur in a cloud datacenter accommodating a large number of virtual resources, they tend to spread rapidly and widely, impacting on many cloud users (tenant owners). One of the best ways to prevent a failure from spreading in the system is identifying signs of the failure before its occurrence and deal with it proactively before it causes(More)
J'aimais, et j'aime encore, les mathématiques pour elles-mêmes comme n'admettant pas l'hypocrisie et le vague, mes deux bêtes d'aversion. Abstract. Heuristics, simulation, artificial intelligence techniques and combinations thereof have all been employed in the attempt to make computer systems adaptive, context-aware, reconfigurable and self-managing. This(More)
TSLC1/IGSF4, an immunoglobulin superfamily molecule, is predominantly expressed in the brain, lungs, and testes and plays important roles in epithelial cell adhesion, cancer invasion, and synapse formation. We generated Tslc1/Igsf4-deficient mice by disrupting exon 1 of the gene and found that Tslc1(-/-) mice were born with the expected Mendelian ratio but(More)
This chapter explores ways in which rigorous mathematical techniques termed formal methods can be employed to improve the predictability and dependability of autonomic computing. Model checking, formal specification and quantitative verification are presented in the contexts of conflict detection in autonomic computing policies, and of implementation of(More)