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Nowadays many new technologies are being developed and introduced for Internet, home networks, and sensor networks. The new technologies must be evaluated in detail before deployment. However the above mentioned networks have a large number of nodes and a complicated topology. Therefore it is difficult to analyze such networks using typical network(More)
To sustain a large-scale overlay network, knowledge about network characteristics is indispensable. However, the collection of such information is often a burden on the developers: why should they struggle to obtain the information even though it is not their intended purpose? As one solution to this problem, this paper presents N-TAP, a distributed(More)
Social networks that are built on top of the web, e.g., orkut [9], have been proliferating among online communities. We propose social inter-networks, where essential functions of social networks are implemented on top of peer-to-peer networks. Participants and communities are connected through attribute queries and reputation queries; reputation queries(More)
The importance of large-scale measurement infrastructures for grasping the global state of the Internet is recently strongly emphasized. However , a fundamental analysis of these infrastructures has not yet been conducted. In this paper, we highlight the formation of measurement networks and provide a first look at measurement activities performed on those(More)
OBJECTIVE The purpose of this study was to investigate morphologic differences using plain film radiographs in cervical intervertebral foramina (IVF) for the following positions: neutral; flexion combined with lateral flexion to the right, rotation to the left (FLFR-RL); and flexion combined with lateral flexion to the right, rotation to the right(More)
OBJECTIVE The purpose of this study was to investigate the immediate effects of manual traction of the hip joint on joint space width (JSW) on asymptomatic subjects. METHODS Asymptomatic, healthy male volunteers (n = 15), aged 25 to 34 years were included in this study. Three radiographs were obtained with the subjects in the supine position, before and(More)
The variety of Quality of Service (QoS) requirements from applications is increasing and overlay networks are spreading widely. Because of this, a means of flexibly supporting various applications, including overlay network applications, must be devised. In this paper, we describe an inter-ISP virtual backbone infrastructure designed to flexibly meet(More)