Yoshiaki Katayama

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This study assessed markers of vascular endothelial cell dysfunction associated with early atherosclerosis in carotid arteries. We measured the plasma levels of free-form tissue factor pathway inhibitor (free TFPI), plasminogen activator inhibitor-1 (PAI-1), and von Willebrand factor (vWF) in 522 adults without cardiovascular disease enrolled in the Suita(More)
This paper describes a case study of building a prototype of an immersive three dimensional (3-D) modeler which supports simple two-handed operations. Designing 3-D objects in a virtual environment has a number of advantages for 3-D geometry creation over designing with traditional computer aided design (CAD) tools. In order to enhance the human-computer(More)
This paper proposes a novel on-demand multipath routing protocol (AODVM-PSP) for a mobile ad hoc network. We devised a new multipath utilization method with probability selection, with which each node deliberately selects one of the multipath routes to utilize. We examined our protocol under various network loads. We evaluated our protocol with Omnet(More)
Firewalls are one of the most deployed mechanisms to protect the network from unauthorized access and security threats. However, maintenance of firewall policy is an error-prone and complicated task for a dynamic network environment. Conflict is a misconfiguration that happens when a packet matches two or more filters resulting in shadowing and redundancy(More)
We propose a model, which simultaneously allocates a data block request to the multiple sites, termed as co-allocation, to enable parallel data transfer in a grid environment. The model comprises of co-allocator, monitor and control mechanisms. The co-allocation scheme adapts well to the highly inconsistent network performances of the sites concerned. The(More)