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International Symposium on information technology, ITSim

作者： Nor Fazlida Mohd Sani Abdullah Mohd. Zin Sufian Idris Faculty of Computer Science and Information Technology Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia Faculty of Computer Science and Information Technology Universiti Kebangsaan슠Malaysia Bangi Selangor Darul Ehsan Malaysia

The purpose of this paper is to present and describe the representation of an object-oriented programming code in the program understanding system. The program’s representation that has been used and will be discussed is an Object-oriented Control Flow Graph (OO-CFG). OO-CFG was an added version on the notation of the traditional control flow graph (CFG). This new OO-CFG has been created since from the literature there are no researches specifically focus on the problem in presenting the communications between objects. Usually the communication between objects in object-oriented program code is by a process of message passing. In this paper, we are introducing the OO-CFG representation and also example on the usage.

关键词： programming Message passing Flow graphs Java Debugging Software Algorithm design and analysis

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Attentiveness Assessment in Learning Based on Fuzzy Logic Analysis

Attentiveness Assessment in Learning Based on Fuzzy Logic An...

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International Conference on Intelligent Systems Design and Applications (ISDA)

作者： Kuo-An Hwang Chia-Hao Yang Department of Computer Science and Information Engineering & Graduate Institute of Networking and CommunicationEngineering ChaoYang University of Technology Taiwan Graduate Institute of Informatics Doctoral program ChaoYang University of Technology Taiwan

Learner attention affects learning efficiency. However, in many classes, teachers cannot assess the degree of attention of every student. When a teacher is capable of addressing inattentive students immediately, he can avoid situations in which students are inattentive. Many studies have analyzed student attentiveness by the applying of image detection technologies. If this mechanism can be applied to in-class learning, it will help teachers keep students attentive, and reduce teacher load during class. This study mainly applies fuzzy logic analysis of student facial images when participating in class. Applying fuzzy logic can prevent erroneous judgments associated with a single term, and help teachers deal with student attentiveness.

关键词： Fuzzy logic Face detection Image analysis Image color analysis Education Eyes Design engineering Chaotic communication Image processing Face recognition

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Insensitivity of constraint-based causal discovery algorithms to violations of the assumption of multivariate normality

Insensitivity of constraint-based causal discovery algorithm...

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21th International Florida Artificial Intelligence Research Society Conference, FLAIRS-21

作者： Voortman, Mark Druzdzel, Marek J. Decision Systems Laboratory School of Information Sciences and Intelligent Systems Program University of Pittsburgh Pittsburgh PA 15260 United States Faculty of Computer Science Bialystok Technical University Wiejska 45A 15-351 Bialystok Poland

ISBN: (纸本)9781577353652

Constraint-based causal discovery algorithms, such as the PC algorithm, rely on conditional independence tests and are otherwise independent of the actual distribution of the data. In case of continuous variables, the most popular conditional independence test used in practice is the partial correlation test, applicable to variables that are multivariate Normal. Many researchers assume multivariate Normal distributions when dealing with continuous variables, based on a common wisdom that minor departures from multivariate Normality do not have a too strong effect on the reliability of partial correlation tests. We subject this common wisdom to a test in the context of causal discovery and show that partial correlation tests are indeed quite insensitive to departures from multivariate Normality. They, therefore, provide conditional independence tests that are applicable to a wide range of multivariate continuous distributions. Copyright © 2008, Association for the Advancement of Artificial Intelligence (***). All rights reserved.

关键词： Normal distribution

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Threshold proxy quantum signature scheme with threshold shared verification

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science China(Physics,Mechanics & Astronomy) 2008年第8期51卷 1079-1088页

作者： YANG YuGuang1,3,4 & WEN QiaoYan2 1 College of computer science and technology,Beijing University of technology,Beijing 100124,China 2 State Key Laboratory of Networking and Switching technology,Beijing University of Posts and Tele-communications,Beijing 100876,China 3 State Key Laboratory of Integrated Services Network,Xidian University,Xi’an 710071,China 4 State Key Laboratory of information Security(graduate University of Chinese Academy of sciences) ,Beijing 100049,China 1. College of Computer Science and Technology Beijing University of Technology Beijing 100124 China 3. State Key Laboratory of Integrated Services Network Xidian University Xi’an 710071 China 4. State Key Laboratory of Information Security (Graduate University of Chinese Academy of Sciences) Beijing 100049 China 2. State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

A threshold proxy quantum signature scheme with threshold shared verification is proposed. An original signer could authorize a group as its proxy signers. Then only t or more of n persons in the proxy group can generate the proxy signature on behalf of the original signer and any t-1 or fewer ones cannot do that. When the proxy signature needs to be verified,any t or more of n persons belonging to the verification group can verify the message and any t-1 or fewer ones cannot verify the validity of the proxy signature.

关键词： quantum signature threshold proxy quantum group signature threshold shared verification

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Harnessing University-Industry Collaboration in Malaysia through Industrial Training

Harnessing University-Industry Collaboration in Malaysia thr...

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International Conference on information and Communication Technologies: From Theory to Applications, ICTTA

作者： Syahrul N. Junaini Sy F. Seyed Fadzir Jonathan Sidi Mohd J. Ahmad Khiri Rosita Mohamed Othman Faculty of Computer Science and Information Technology Universiti Malaysia Sarawak Kota Samarahan Sarawak Malaysia

As Malaysia is rapidly growing in terms of the advancement of science and technology, unprecedented demand for better graduates has been created. However, industry often criticizes that existing university curricula fall short to tackle the practical issues in the industry. For instance, the industry expects the university to train their future employees with the latest technology. In this paper, we propose a smart synergy model to overcome the above-mentioned mismatch. Our hypothesis is that there are the needs for well-expressed and smart connectivity between academia and the industry. This paper highlights strategies to abolish the misalignment between university and industry. Our main concept is to blend the academic rigidity with the industrial relevance. First we analyzed the trend of university-industry partnership in Malaysia. We report the success story and issues behind the industrial training program at the faculty of computer science and information technology, University Malaysia Sarawak.

关键词： Collaboration Industrial training computer science information technology Educational programs computer industry Collaborative work computer science education Power engineering and energy Microelectronics

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Dynamic programming based ray-space interpolation for free-viewpoint video system

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High technology Letters 2008年第1期14卷 72-76页

作者：范良忠 Jiang Gangyi Chen Ken Yu Mei Jiang Zhidi Faculty of hffonnation Science and Engineering Ningbo University Ningbo 315211 P.R. China Institute of Computer Technology Graduate School of Chinese Academy of Sciences Beijing 100871 P.R. China National Key Laboratory of Machine Perception Peking University Beijing 100871 P.R. China

This paper presents a free viewpoint video （FVV） system based on ray-space interpolation method The new algorithm matches individual pixels in corresponding scanline pairs by using a ruing technique. A sparse intermediate view disparity map is projected from matched dynamic programpixels firstly, and the holes （occluded pixels） are filled in by propagating the disparity of neighboring background pixels. After interpolating dense view images, an arbitrary virtual view image can be easily rendered from the dense ray-space converted from these view images. The proposed method is evaluated on the Middlebury data set and compared with other methods, experimental results show that the better quality of the intermediate view is obtained and the corresponding computational complexity is reduced significantly.

关键词： ray-space interpolation dynamic programming intermediate view

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A Tamper Detection Method for RFID Tag Data

A Tamper Detection Method for RFID Tag Data

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IEEE International Conference on RFID

作者： Akira Yamamoto Shigeya Suzuki Hisakazu Hada Jin Mitsugi Fumio Teraoka Osamu Nakamura Graduate school of Science and Technology KEIO University Yokohama Kanagawa Japan Graduate school of Media and Governance KEIO University Fujisawa Kanagawa Japan Department of Information and Computer Science Faculty of Science and Technology KEIO University Yokohama Kanagawa Japan Faculty of Environmental Information KEIO University Fujisawa Kanagawa Japan

ISBN: (纸本)9781424417117

Recently, system designers, especially in the field of product life-cycle management system start considering use of user memory bank of UHF RFID tags. By storing most useful life-cycle data onto a tag, user can access to the data even without access to back-end databases. One of the major issues to make use of the user memory bank is detection of memory tampering. Although technology vendors start introducing new functionalities such as fine grained locking along with high capacity user memory, these tags with new functionalities require new non-standardized air protocol to operate - require modified version of reader/writers. Also, these tags are usually more expensive. In this paper, we introduce a novel approach to this problem: tag side write journaling mechanism and "Tag memory cloaking," which protect the journal by using. Tag private memory region, which is only readable and not writable from external devices such as a reader/writer, but writable by tag itself. Also, any write to the user memory automatically add journal entry - offset and length of the write - into the tag private memory region. Later, a user can check existence of overlapped writes to user memory by checking the journal records. Since we have not modified any of air protocol, standard compliant read/writer can fully capable of all of our proposed operations: write to the tag, read, then detect unusual modification to user memory area. We have implemented the functionality to programmable battery assisted passive tag (BAP), then validated the method with several standard compliant reader/writers.

关键词： RFID tags Radiofrequency identification Read-write memory Memory management Protection Food industry Food manufacturing information management Home appliances Recycling

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Recommending mobile content using content diffusion and user preference transition

Recommending mobile content using content diffusion and user...

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2008 International Conference on e-Learning, e-Business, Enterprise information Systems, and e-Government, EEE 2008

作者： Lee, Tong Queue Lee, Eunchang Park, Young Park, Yongtae Department of Mobile Internet Dongyang Technical College Seoul Korea Republic of Graduate Program in Technology and Management Seoul National University Seoul Korea Republic of Department of Computer Science and Information Systems Bradley University Peoria IL United States Department of Industrial Engineering Seoul National University Seoul Korea Republic of

ISBN: (纸本)1601320639

Recommendation accuracy is especially important in mobile e-commerce environments due to the limited screen size of mobile devices and relatively expensive connection costs. Mobile content tends to be fashionable and are geared for young users. This paper presents a novel method of building a more accurate recommender system for mobile content in a mobile ecommerce environment. The method is based on collaborative filtering, and models content diffusion and user preference transition and incorporates them in constructing pseudo ratings from implicit feedback data. In a variety of experiments, recommender systems based on the method showed significantly better recommendation accuracy than a pure collaborative filtering-based recommender system.

关键词： Collaborative filtering

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An Efficient Forward and Backward Fault-Tolerant Mobile Agent System

An Efficient Forward and Backward Fault-Tolerant Mobile Agen...

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International Conference on Intelligent Systems Design and Applications (ISDA)

作者： Jong-Shin Chen Hong-Da Shi Ching-Mu Chen Zeng-Wen Hong Pei-Lin Zhong Graduate Institute of Networking and Communication Engineering ChaoYang University of Technology Taichung Taiwan Department of Computer Science and Information Engineering Chung Cheng Institute of Technology Changhua Taiwan Computer Science and Information Engineering Asia University Taichung Taiwan

Mobile agent is a special program and it can switch and execute the task of user commands among the networks and hosts. During the task executing, the mobile agent can convey the data, state and program code to another host in order to autonomously execute and continue the task in another host. While the mobile agent is executing the task at any of the software and hardware fault incurred or network problems, there will be two conditions as following lists: 1. Users continuously wait the reply from the agent, but users will never have the reply because of the some faults incurred to the agent in the networks or hosts. 2. Users assign a new agent as the former agent has been lost to restart the former task, but the former agent only congested the delay problem of the network or host. This causes that these two agents have the same task to be executed. Therefore, the fault detecting and recovering of the mobile agent are important issues to be discussed. However, this paper propose a front behind failure detection and recovery method that the task agent has to report the task process at the present stage to the former and latter agent and agents will exchange their messages for the present stage. This is more accurate than the method in for the task at present because it can reduce the loading of the task fault report from the network congested.

关键词： Fault tolerant systems Mobile agents Hardware Network servers Design engineering computer science Switches Fault detection Intelligent systems Intelligent agent

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Fast replica allocation method by parallel calculation on DAPDNA-2

Fast replica allocation method by parallel calculation on DA...

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Asia-Pacific Conference on Communications

作者： Hiroyuki Ishikawa Sho Shimizu Yutaka Arakawa Naoaki Yamanaka Kosuke Shiba Department of Information and Computer Science Faculty of Science and Technology Keio University Yokohama Japan IPFlex Inc. Shinagawa Tokyo Japan

Replica placement problem is to select a subset from a group of potential nodes to put replicas in Content Distribution Network (CDN). It is derived from the set cover problem which is known to be NP-hard. So it is difficult to calculate the large-scale replica placement problem on a program counter-based processor. Several greedy algorithms are proposed in order to decrease calculation time. However, it was proved mathematically that no greedy algorithm can obtain the optimal solution. This paper proposes a fast calculation method of the replica placement problem, which is implemented on reconfigurable processor DAPDNA-2 of IPFlex Inc. Our proposed method divides the combination optimally and performs pipeline operation. Beeler's algorithm can calculate all combinations in ascending order but it has data dependence. It's difficult to calculate any pattern because each data increases irregularly. In order to solve this problem, we propose the new algorithm that generates any order pattern. In addition, the optimal number of partitions depends on the number of combinations and calculation clocks of Beeler's algorithm. In order to solve this problem, we think about the optimal division number in theory. While the time complexity of conventional method is proportional to the number of combinations, that of proposed method is proportional to the square root of the number of combinations. Experimental results show that the proposed algorithm reduces the execution time by 40 times compared to Intel Pentium 4 (2.8 GHz).

关键词： Network servers Costs Greedy algorithms Pipelines Partitioning algorithms DNA Large-scale systems computer science Sun Digital audio players

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