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ALM (Application Level Multicast) is one of the promising ways for resolving multicast incentive problem of non-multicast hosts not implementing multicast routing protocol. ALM protocol is implemented in application layer, which means it is easier to be altered by end users than lower layer protocols. Malicious users would like to get higher position in ALM tree because it can obtain higher throughput...
Infrared (IR) sensors are used for various purposes, such as human body detection. This study concerns the development of downsized, low-cost lenses for IR sensors, and it is argued that computer generated holograms (CGH) are applicable to a lens. Lenses with CGH are inexpensive and lightweight since they can be mass-produced by using stampers, similar to compact discs. This study shows that lenses...
The demand for web site building for individual persons is increasing rapidly. In order to implement a web site for personal use, the web site information has to be described with HTML or a conventional home page (HP) builder. In order to use HTML or a HP builder, some IT expertise is required. So the task of building a web site is usually outsourced to IT professionals. As a result, it takes time...
In ad hoc wireless networks, end-to-end TCP is well-known that it can obtain very low throughput with increase of the number of hops. One promising way to resolve this technical problem of TCP throughput degradation is proxy-based TCP. In proxy-based TCP, an end-to-end TCP session is divided by (an) intermediate proxy host(s), which leads to reduction of hop-count of each divided session and improvement...
Model checking finds failures in software by exploring every possible execution schedule. Until recently it has been mainly applied to stand-alone applications. This paper presents the I/O-cache, an extension for a Java model checker to support networked programs. It contains a cache module, which captures data streams between a target process and its peer processes. This demonstration also shows...
This paper presents a novel position command shaping approach for the mechanical vibration suppression in mechatronic systems. Although conventional command shaping approaches can suppress the specified mechanical vibrations, mechanical and/or electrical perturbations in plant may deteriorate the motion performance. In this research, a linear matrix inequality (LMI) design framework is applied to...
In these days, tracking control for vehicles with nonlinear dynamics is intensively studied. Especially when vehicles run at low speed, exact linearization based on time-state controller form realizes exponential convergence to the reference trajectory. When a vehicle corners a curve at high speed, however, tracking error due to sideslip angle of tires appears. To recover the exponential convergence...
The demand for information services considering personal preferences is increasing. In this paper, we propose a system for automatically acquiring personal preferences from TV viewerpsilas behaviors. Our system firstly extracts intervals of interest and estimates the interest degree for each extracted interval based on the temporal patterns in facial changes by Hidden Markov Models (HMMs). Then, the...
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