論文 - 武藤　佳恭

Self debugging mode for patch-independent nullification of unknown remote process infection

Ando Ruo, Takefuji Yoshiyasu

  85 - 95 2005年

　概要を見る

<p>The rapid increase of software vulnerabilities shows us the limitation of patch-dependent countermeasures for malicious code. We propose a patch-independent protection technique of remote infection which enables each process to identify itself with "being infected" and nullify itself spontaneously. Our system is operating system independent and therefore does not need software rebuilding. Previously, no method for stopping malicious process without recompiling source code or re-building software has been proposed. In proposal system, target process is running under self debugging mode which is activated by enhancing debug() exception handler and utilizing MSR debug register. In this paper we show the effectiveness of proposal method by protecting the remote process infection without patching security holes. Implemention of device driver call back function and BranchIP recorder provides the real-time prevention of unregistered worm attack through Internet. In experiment, function test of stack buffer overflow of Win32.SQLExp.Worm is presented. Also CPU utilization corresponding to the number of calling function and some database operations is showed.</p>

Object segmentation using maximum neural networks for the gesture recognition system

Yoshiike Noriko, Takefuji Yoshiyasu

Neurocomputing 51   213 - 224 2003年04月

ISSN  0925-2312

　概要を見る

<p>In this paper, we present a new clustering method for segmentations of moving target and non-target objects. We assume that the moving target object has the following conditions: (1) object motion data continuity inter-frame, and (2) object motion data continuity intra-frame. In our model, clusters tend to form as filling these two conditions. The experimental results showed the effectiveness of the proposed algorithm and the performance of this model in terms of the quality of the recognition results. Our algorithm is able to clean the input noise by removing non-target objects before the recognition process.</p>

• Access to Document (DOI)

Two-stage orthogonal network incident detection for the adaptive coordination with SMTP proxy

Ando Ruo, Takefuji Yoshiyasu

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2776   424 - 427 2003年

ISSN  0302-9743

　概要を見る

<p>In this paper we present an adaptive detection and coordination system which consists of anomaly and misuse detector combined by lightweight neural networks to synchronize with specific data control of proxy server.The proposed method is able to correct false positive of anomaly detector for the unusual changes in the segment monitored by the subsequent misuse detector. The orthogonal outputs of these two detectors can be applied for the switching condition between the parameter settings and the protective data modification of proxy. In the unseen attacks our model detects, the forwarding delay time set in the proxy server according to the detection intervals enable us to protect the system faster and prevent effectively the malicious code from spreading.</p>

Solving vehicle routing problems by maximum neuron model

Yoshiike Noriko, Takefuji Yoshiyasu

Advanced Engineering Informatics 16 （ 2 ） 99 - 105 2002年04月

ISSN  1474-0346

　概要を見る

<p>In this paper, we propose a new clustering method for the first phase of a two-phase method of the vehicle routing problems (VRPs) and the traveling salesman problems (TSPs). In the first phase, the customers are grouped as several delivery areas for vehicle by using maximum neuron model. In the second phase, the TSPs for each areas are solved by using elastic net model proposed by Andrew et al. Conventional maximum neuron model proposed by Takefuji et al. is not suitable for these continuous problems. But by including a self-organization rule to this model, the solution quality is improved. Our simulation results show that maximum neuron model can achieve to obtain better solutions than other methods for some kinds of problems in VRPs and TSPs.</p>

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Development of an imaging hyperspectral camera using the ultraviolet and visible wavelength AOTF

Kurosaki Hirohisa, Shingu Hirokimi, Enkyo Shigeharu, Suzuki Takao, Tanioka Kenkichi, Takefuji Yoshiyasu

  594 - 603 2002年

　概要を見る

<p>A spectroscopic camera has been developed which has spectral resolution of less than 1.5nm in the ultraviolet (UV) and visible wavelength bands (320-580 nm). Its main components are a specially coated UV objective lens, a UV Acousto-Optic Tunable Filter (AOTF) with a thermo-electric cooling system, and a imaging system based on a high-gain avalanche rushing amorphous photoconductor (HARP) developed by NHK Science and Technical Research Laboratories. Research is currently under way to develop the hyperspectral camera into a sensor package for airborne and ultimately space-based remote sensing applications. This paper presents the basic principle and configuration of the hyperspectral camera, and gives details of tests to measure its performance. The results of spectral resolution tests analyzing very close two spectra from a helium-discharge lamp demonstrate the camera's high spectral resolution performance. Full color and spectral images obtained by a spectrometry experiment are also presented to demonstrate the camera's hyperspectral capabilities.</p>

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neural computing for Iroha-Uta generation

Y Takefuji, Y. Yoshiike, M. Kitabata

IPSJ Tran. on Mathatical Modeling and Its Applications 42 （ SIG(TOM4) ）  2001年05月

研究論文（学術雑誌）, 共著, 査読有り

Mixed Pattern Segmentation by Using Chaotic Neural Network

Y.Takefuji, Y.Fukuhara,

IPSJ Tansactions on Mathmatical Modeling and Its Applications 42 （ SIG(TOM4) ）  2001年05月

研究論文（学術雑誌）, 共著, 査読有り

Boxed Economy Simulation Platform and foundation model

Iba T., Takabe Y., Chubachi Y., Takefuji Y.

  34 - 38 2001年

　概要を見る

<p>The authors propose a "Boxed Economy Simulation Platform", which is a sharable basis for agent-based economic simulations. By providing the basic design of the social model, which we call "Boxed Economy Foundation Model", it enables collaborative research more efficiently. Sharing and cumulating the model components can be promoted by domain-specific design at the level of social model rather than the level of abstract general purpose model. It will be able to contribute to remove factors that have been making it difficult for social scientists to participate in and conduct agent-based research.</p>

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Third eye approach to innovative designs and applications into the 21st century

Oka S., Takefuji Y., Huang W.

Engineering Applications of Artificial Intelligence 13 （ 5 ） 543 - 548 2000年10月

ISSN  0952-1976

　概要を見る

<p>The field of remote sensing and sensor technology has undergone tremendous development in the past decades. Sensors technologies of all kinds such as electro-optics, acoustic, active/passive UV to LWIR, ground-penetrating radar, passive mm wavelength, X-ray tomography, neutron activation imaging, multi-spectral, hyper-spectral, and ultra-spectral imaging, will provide valuable images that normal CCD camera cannot offer. By combining algorithms and images taken by sensors at different part of the electromagnetic spectrum, we will be able to extract valuable images automatically. By using multi-spectral images and processing them with neural network computing, our `Third Eye' team is able to extract human face features from those images. In this paper, we will present an application for detecting human facial parts, images taken by different imaging systems and sensors, and the current status of image processing applications.</p>

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Perspectives of unlicensed information infrastructure using spread spectrum technology

IEEE COMMUNICATIONS MAGAZINE 38 （ 5 ） 58 2000年05月

共著

Boxed Economy Model Fundamental Concepts and Perspectives

Iba Takashi, Hirokane Masaharu, Takabe Yohei, Takenaka Heizo, Takefuji Yoshiyasu

  941 - 944 2000年

　概要を見る

<p>In this paper, the concept of Boxed Economy model is proposed. Boxed Economy model is an agent-based microeconomic simulation which is intended to make predictions and explanations of the real economic movements in the general economy. We suggest the importance of reusable design with object-oriented framework in the field of agent-based economic simulation. Two frameworks at the different level are described in this paper: "Boxed Simulator Framework" and "Boxed Economy Framework". The source code and model is going to be open to public for sharing and co-improving.</p>

The third eye approach to innovative designs and applications into the 21st century: human recognition system by nonlinear oscillations

Engineering Applications of Artificial Intelligence 13 （ 5 ） 543-548 2000年

研究論文（学術雑誌）, 共著

Human face Detection System by KenzanNET

Int. journal of knowledge-based intelligent engineering system 4 （ 4 ） 237-243 2000年

研究論文（学術雑誌）, 共著, 査読有り

Verifying of the Detected Eye Part by Multidirectional Associative Memory

Int. journal of knowledge-based intelligent engineering system 4 （ 4 ） 219-229 2000年

研究論文（学術雑誌）, 共著

Detection of Human Facial Parts using Infrared and Visible Images

Int. journal of knowledge-based intelligent engineering system 4 （ 4 ） 213-218 2000年

研究論文（学術雑誌）, 共著

A self-Organized Oscillation in Detectiong Time-Varing Human Faces

Int. journal of knowledge-based intelligent engineering system 4 （ 4 ） 243-253 2000年

共著, 査読有り

Neural network parallel algorithm for one-dimensional gate assignment problems

Tsuchiya Kazuhiro, Takefuji Yoshiyasu, Kurotani Ken Ichi

Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi) 129 （ 2 ） 71 - 77 1999年11月

ISSN  0424-7760

　概要を見る

<p>A near-optimum parallel algorithm for solving the one-dimensional gate assignment problem is presented in this paper, where the problem is NP-hard and one of the most fundamental layout problems in VLSI design. The proposed system is composed of n×n processing elements based on the artificial two-dimensional maximum neural network for (n+2)-gate assignment problems. Our algorithm has discovered improved solutions in the benchmark problems compared with the best existing algorithms. The proposed approach is applicable to other VLSI layout problems such as the PLA (Programmable Logic Array) folding problem.</p>

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ATM and Wireless Experiments for Remote Lectures

Takefuji Yoshiyasu, Takahashi Naoko, Tsuchida Hisasumi, Fukuhara Yoshimi, Neff Raymond

IEEE Communications Magazine 37 （ 3 ） 98 - 101 1999年03月

ISSN  0163-6804

　概要を見る

<p>In this article we examine our remote lecture experiments using ATM and UNII wireless devices. We discussed which functions should be improved in the current distance-learning system. UNII/SUPERNet wireless devices are introduced for achieving economical distance-learning systems. Two experiments of remote lectures are detailed: a wireless experiment between two buildings in the Philippines and an ATM experiment between Japan and the United States.</p>

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TELE-LEARNING: THE "KILLER APP"? - ATM AND WIRELESS EXPERIMENTS FOR REMOTE LECTURES - Two experiments of remote lectures are detailed: A wireless experiment between two buildings in the Philippines and an ATM experiment between Japan and the United States

Takefuji, Y; Takahashi, N; Tsuchida, H; Fukuhara, Y; Neff, R

IEEE communications magazine 37 （ 3 ） 98- 1999年03月

共著

Human Detecting System by Hybrid Self-Organization Classification Scheme and CombNET

Chashikawa, T., Fujii, K., Takefuji, Y.

ARTIFICIAL INTELLIGENCE IN REAL TIME CONTROL 1998 7   131-136 1999年03月

共著