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Peer-to-Peer (P2P) file sharing networks have witnessed dramatic increase in popularity for the past few years. In order to meet the demand of users, most P2P file sharing networks have been primarily focusing on improving transmission efficiency and network scalability. However, these networks do not usually have management mechanisms for distributing… (More)
In this paper, we present a new design method of infinite impulse response (IIR) digital filters with quasi-equiripple absolute error in the complex domain. This method is based on solving a least squares solution iteratively. At each iteration, the desired response for the least squares approximation is transformed to have equiripple error. This algorithm… (More)
The NWT was reinforced to get 280 GFLOPS of theoretical peak performance with the addition of 26 PEs to the original 140 PEs. On a CFD simulation of jet engine compressor, we attained active performance speed of 111 GFLOPS using 160 PEs.
Capital expenditure (CAPEX) and operating expenses (OPEX) have been practical concerns for telecommunication companies, and Network Function Virtualization (NFV) has attracted significant attention in recent years. However, the NFV Infrastructure (NFVI) includes a wide variety of resource types and stakeholders. Hence, there is still a need for the existing… (More)
BitTorrent is one of the most popular P2P file sharing applications in the world. Each BitTorrent network is called a swarm and millions of peers may join multiple swarms. However, there are many unreachable peers (NATed, Fire-Walled, or inactive at the time of the measurement) in each swarm. Due to this unreachable peers problem, the existing work can… (More)
NFV, being discussed and standardized in ETSI, is regarded as a promising candidate technology for Future Networks. Although many advantages are expected, the introduction of NFV will greatly challenge current management systems. In this paper, we summarize some of the carrier's requirements for the management of NFV, based on which we propose vConductor as… (More)
NAL Numerical Wind Tunnel (NWT) is a distributed memory parallel computer developed through joint research and development of NAL and Fujitsu. It is based on the analysis of CFD codes developed in NAL. The target performance is more than 100 times faster than VP400.In this paper, the parallel computation model employed in the development of the NWT is… (More)