Masaaki Shimizu

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BACKGROUND Enumeration of chemical graphs satisfying given constraints is one of the fundamental problems in chemoinformatics and bioinformatics since it leads to a variety of useful applications including structure determination of novel chemical compounds and drug design. RESULTS In this paper, we consider the problem of enumerating all tree-like(More)
Turning towards exascale systems and beyond, it has been widely argued that the currently available systems software is not going to be feasible due to various requirements such as the ability to deal with heterogeneous architectures, the need for systems level optimization targeting specific applications, elimination of OS noise, and at the same time,(More)
Dedicated processors that are specialized for numerical computations, such as the Cell/B.E. and vector processors, tend to have low performance in the integer computations required by operating systems. To solve this problem, we propose a remote process and remote file I/O management architecture that enables processes on compute nodes that have dedicated(More)
Mobile ad-hoc networks (MANETs) are expected to substitute for existing networks when the latter are disrupted by a disaster, etc. However, it has been pointed out that communication quality of MANETs is lower than that of existing networks, and that the use of transmission control protocol (TCP) over MANETs extremely degrades its performance. This paper(More)
The patient was a 52-year-old woman. She had been aware of her bilateral hearing loss since she was 20 years old. The hearing in her left ear started to deteriorate at the age of 49. Pure-tone audiometry showed a bilateral mixed hearing loss. The hearing levels for the right ear and the left ear were 52 dB and 68 dB, respectively. There were no remarkable(More)
We have examined a tonal system of modern Hanoi dialect of Vietnamese. This has been described for a long time as a pitch contour prominent system with secondary phonatory variations. The present study aims to propose certain laryngeal features, [tense] and [glottal constriction], in addition to the former prosodic feature, [high], to cover the overall(More)
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