Faculty Profiles - NOMURA Yoshinari

MISC - NOMURA Yoshinari

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ソースコード解析情報に基づく細粒度マルチスレッド制御法の提案

森山英明, 乃村能成, 谷口秀夫

第69回全国大会講演論文集 2007 ( 1 ) 33 - 34 2007.3

Evaluation of Combination of Spam Filters Considering User's Characteristic

YAMAMOTO YASUTAKA, NOMURA YOSHINARI, TANIGUCHI HIDEO

IPSJ SIG Notes 2007 ( 16 ) 189 - 194 2007.3

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

We proposed the composite filter which mixes up existing spam filters, and evaluated its basic performance. As a method for reflecting user's characteristic to the composite filter's judgment, we describe the method for setting a weight to each spam filter's judgment. The weight is based on classification log of spam filter and judgment of user. In this paper, we describe the evaluation of the composite filter applied the weighting method in actual case. The composite filter had no misclassification of legitimate email, and classified 43.07% of spam. Then the composite filter obtained the best spam detection rate using classification log of the past 24th.

Process creation mechanism for AnT

仁科匡人, 野村裕佑, 田端利宏, 乃村能成, 谷口秀夫

情報処理学会研究報告 2007 ( 36(OS-105) ) 7 - 14 2007

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

AnT is an operating system based on micro-kernel architecture. Filesystem, device driver and other operating system modules run as a process named external-core. AnT can adapt various kind of computer environment by changing set of external-core. In this paper, we present process creation mechanism for AnT to make AnT adapt computer environment and create process need by AnT. And we present efficient mechanism of process control.

Design and Implementation of Memory Management for AnT Operating System

梅本昌典, 田端利宏, 乃村能成, 谷口秀夫

情報処理学会研究報告 2007 ( 10(OS-104) ) 33 - 40 2007

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

AnT is an operating system based on micro-kernel architecture. Therefore, AnT can provide various kinds of service. However, there is a problem about a data transferring overhead caused by a lot of inter-process communications. Therefore, we need to examine memory management so that AnT can transfer data with low overhead. In this paper, we present design, implementation and evaluation of memory management. Resulting from the design and the implementation, AnT can realize memory protection from each program, high speed inter-process communication and high speed rebooting. We evaluate data transferring and rebooting.

B_032 Effect of virtual address space switch in device driver running as process

Nomura Yusuke, Okamoto Kouta, Nomura Yoshinari, Taniguchi Hideo, Maruyama Katsumi

5 ( 1 ) 139 - 140 2006.8

The Implementation and Evaluation of handling Many I/O Requests Based on Zero-Wait Threads for The Fuce Processor

AONO MITSUHIRO, IZUMI MASAAKI, MATSUZAKI TAKANORI, KUSAKABE SHIGERU, NOMURA YOSHINARI, TANIGUCHI HIDEO, AMAMIYA MAKOTO

IPSJ SIG Notes 103 ( 86(OS-103) ) 25 - 32 2006.8

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

Zero-Wait Thread is a continuation-based thread and supposed to run to completion without suspention. We have implemented handler routines for multiple I/O requests based on Zero-Wait Threads for the Fuce processor. The Fuce processor supports a continuation model which is a varient of dataflow computing model. Handling I/O requests causes high latencies in operating systems, implementation based on Zero-Wait Thread allows performance improvement and effective in threads parallel execution. This paper explains our impelementation and shows evaluation for effectiveness of Zero-Wait Thread on the Fuce processor.

A User Management System Using DHCP Server

NOMURA YOSHINARI, IRIE MASAHIRO, TANIGUCHI HIDEO

IPSJ SIG Notes 127 ( 61(DPS-127) ) 31 - 36 2006.6

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

Recently, we are supposed to manage information about all PCs in every office, such as administrator, location, mac-address, list of installed softwares... However, it is difficult to do that strictly, some sites give up the management and a DHCP server supplies a free-to-connect network inside the LAN. Besides security risks, the situation is ugly. That is, we have to be accountable for compliance with laws: information leakage protection, software license management. In this paper, we describe a system to help changing the situation gradually. We introduce IP address based classify of users using DHCP server. It is naturally acceptable to free-to-connect network. This IP address based restriction gradually lead users to manage their PCs by themselves.

Evaluation of communication monitoring method on TwinOS

YAMAMOTO YU-MA, NOMURA YOSHINARI, TANIGUCHI HIDEO

IPSJ SIG Notes 102 ( 44(OS-102) ) 53 - 60 2006.5

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

Recentl, illegal attacks to OSs are increasing. A lot of intruder detection method have been proposed. In this paper, we propose a method for monitoring communication using TwinOS, TwinOS runs two Linux on a single PC, and has a virtual NIC that provides one Linux with the other Linux's NIC. Our proposed method monitors one Linux's communication from the other Linux via virtual NIC, and keep log from intruders.

谷口秀夫, 乃村能成, 田端利宏

第68回全国大会講演論文集 2006 ( 1 ) 41 - 42 2006.3

AnTオペレーティングシステムのドライバ構造

乃村能成, 野村裕佑, 仁科匡人, 谷口秀夫

第68回全国大会講演論文集 2006 ( 1 ) 43 - 44 2006.3

Directory oriented buffer cache mechanism

SAITOU Kei, NOMURA Yoshinari, TANIGUCHI Hideo

IPSJ SIG Notes 101 ( 15(OS-101) ) 69 - 76 2006.2

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

Average operating systems manage disk I/O cache by a block unit with LRU method. On the other hand, Application programs (APs) handle data from a viewpoint of file unit. To fill up the gap, we propose a directory oriented buffer cache mechanism that reflects on the demands of APs. Our mechanism is based on a thought that a disk access pattern occurred from a series of job will be settled in a corresponding particular directory. We give a high priority to the important directory, which is associated with an important job. This paper describes an implementation and an evaluation of our method.

An implementation of device drivers using running mode switch mechanism

NOMURA Yusuke, NOMURA Yoshinari, YOKOYAMA Kazutoshi, TANIGUCHI Hideo, MARUYAMA Katsumi

IPSJ SIG Notes 101 ( 15(OS-101) ) 25 - 31 2006.2

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

Conventional operating systems used to implement device drivers as kernel modules or embedded objects. Therefore, maturity of a device driver influences the reliability of a whole system. In this paper, we propose a method for constructing isolated device drivers in the form of user process. Our proposed method uses the running mode switch mechanism of application programs. User process device drivers enhance the reliability of the operating system. We evaluated the basic overhead of our method.

Evaluation of a Process Scheduling Mechanism for Fine Grain Multithread Architecture

OGAWA YASUHIKO, NOMURA YOSHINARI, KUSAKABE SHIGERU, TANIGUCHI HIDEO, AMAMIYA MAKOTO

IPSJ SIG Notes 101 ( 15(OS-101) ) 47 - 53 2006.2

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

In a fine grain multi-thread environment, operating systems are required to control innumerable threads efficiently. As a solution for the thread scheduling overhead problem, it is a good idea to control threads by injecting extra delays to their inter-thread synchronization. In the manner of this idea, we have to consider the optimal frequency and pattern of the delay injection. In this paper, we consider and evaluate some patterns of the delay injection.

Combination of Spam Filters Considering User's Characteristic

山本泰隆, 乃村能成, 谷口秀夫

情報処理学会シンポジウム論文集 2006 ( 15 ) 97 - 102 2006

B_030 Realization of High Speed Inter-process Communication for AnT

Umemoto Masanori, Tabata Toshihiro, Nomura Yoshinari, Taniguchi Hideo

FIT 2006 ( 1 ) 135 - 136 2006

B_036 Evaluation of Directory Oriented Buffer Cache Mechanism

Kotoge Miyuki, Saitou Kei, Tabata Toshiihro, Nomura Yoshinari, Taniguchi Hideo

FIT 2006 ( 1 ) 147 - 148 2006

Design for AnT Operating System

谷口秀夫, 乃村能成, 田端利宏, 安達俊光, 野村裕佑, 梅本昌典, 仁科匡人

情報処理学会研究報告 2006 ( 86(OS-103) ) 71 - 78 2006

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

There is a remarkable thing for progress of a microprocessor and input-output hardware. Furthermore, improvement of transmission speed of a channel is remarkable, too. In addition, a computer is necessary in various scenes, and service classification to offer increases drastically. It is demanded that base software can use a function and performance of these hardware effectively. Therefore it was started development the AnT operating system (An operating system with adaptability and toughness) to have both adaptability and solidity. This article explains a design policy of the AnT operating system and a characteristic function.

Information Leak Detection by Tracing Classified Information Diffusion

田端利宏, 箱守聰, 箱守聰, 横山和俊, 乃村能成, 谷口秀夫

情報処理学会シンポジウム論文集 2006 ( 11 ) 2006

AnTにおけるプラグアンドプレイ機能の実現方式

安達俊光, 田端利宏, 乃村能成, 谷口秀夫

電気・情報関連学会中国支部連合大会講演論文集(CD-ROM) 57th 2006

Information Leak Detection by Tracing Classified Information Diffusion

田端利宏, 箱守聰, 箱守聰, 横山和俊, 乃村能成, 谷口秀夫

情報処理学会シンポジウム論文集 2006

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