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International Conference on computer science and Software engineering, CSSE 2008

作者： Cen, Ting-Ting Han, Jian-Min Yu, Hui-Qun Yu, Juan Dep. of Math Physics and Information Engineering College of Zhejiang Normal University Jinhua 321004 China Dep. of Computer Science and Engineering East China University of Sci and Tech Shanghai 200237 China

ISBN: (纸本)9780769533360

Microaggregation is an important technique to the k-anonymized datasets. However, most existing microaggregation algorithms to achieving k-anonymity have some defects on distance measurement for categorical and mixed data. In this paper, we introduce a categorical data semantic hierarchy to their distance measurement to improve clustering quality. The paper also investigates mixed distance for mixed data and designs an efficient microaggregation algorithm for them. Experiments show that the distance measurement for categorical data cause less distortion, and the improved microaggregation algorithm based on the mixed distance enjoys better clustering quality than the traditional MDAV algorithm. © 2008 IEEE.

关键词： Semantics

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Multiple-f0 tracking based on a high-order hmm model

Multiple-f0 tracking based on a high-order hmm model

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11th International Conference on Digital Audio Effects, DAFx 2008

作者： Chang, Wei-Chen Su, Alvin W. Y. Yeh, Chunghsin Roebel, Axel Rodet, Xavier Dep. of Computer Science and Information Engineering National Cheng-Kung University Tainan Taiwan Analysis/Synthesis Team IRCAM/CNRS-STMS Paris France

ISBN: (纸本)9789512295173

This paper is about multiple-F0 tracking and the estimation of the number of harmonic source streams in music sound signals. A source stream is understood as generated from a note played by a musical instrument. A note is described by a hidden Markov model (HMM) having two states: the attack state and the sustain state. It is proposed to first perform the tracking of F0 candidates using a high-order hidden Markov model, based on a forward-backward dynamic programming scheme. The propagated weights are calculated in the forward tracking stage, followed by an iterative tracking of the most likely trajectories in the backward tracking stage. Then, the estimation of the underlying source streams is carried out by means of iteratively pruning the candidate trajectories in a maximum likelihood manner. The proposed system is evaluated by a specially constructed polyphonic music database. Compared with the frame-based estimation systems, the tracking mechanism improves significantly the accuracy rate.

关键词： Hidden Markov models

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Evaluating Aspect- and Object-Oriented Concepts to Model Distributed Embedded Real-Time Systems Using RT-UML

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IFAC Proceedings Volumes 2008年第2期41卷 6885-6890页

作者： Marco A. Wehrmeister Edison P. Freitas Dalimir Orfanus Carlos E. Pereira Franz Rammig Instituto de Informática Heinz Nixdorf Institute University of Paderborn Paderborn Germany School of Information Science Computer and Electrical Engineering Halmstad University Halmstad Sweden International Graduate School Dep. Engenharia Elétrica Federal University of Rio Grande do Sul Porto Alegre Brazil

The growing design complexity of today's embedded real-time systems requires new techniques aiming the raising of the abstraction level since earlier stages of design in order to deal with such complexity in a suitable way. This paper reports a case study, which provides an assessment of two well-know high-level paradigms, namely Aspect- (AO) and Object-Oriented (OO) Paradigms. Concepts of both paradigms were applied at modeling phase of a Distributed Embedded Real-Time System (DERTS). The handling of DERTS’ functional and non-functional requirements (at modeling level) using AO and OO concepts is discussed. Both paradigms are compared using of a set of software engineering metrics, which were adapted to be applied at modeling level. The presented results show the suitability of each paradigm for DERTS specification in terms of reusability quality of model elements.

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An integrative approach for teaching/tutoring process models using meta-models

An integrative approach for teaching/tutoring process models...

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IADIS International Conference on Cognition and Exploratory Learning in Digital Age, CELDA 2007

作者： Martens, Alke Harrer, Andreas University of Rostock Dep. of Computer Science and Electrical Engineering Albert-Einstein-Str. 21 D-18059 Rostock Germany University of Eichstätt Dep. of Mathematics and Geography Ostenstr. 14 D-85072 Eichstätt Germany

ISBN: (纸本)9781627483322

This paper discusses different formal models to represent educational processes and their use by computer systems. Currently most of these models are tied to specific application scenarios and tools, which reduces the transferability and re-usability of these models in different contexts. To achieve the interoperable use and transfer between different educational systems we propose the meta-modeling approach GOLEM (Graphically Organized Learning and Educational Metamodel) using an intermediary visual language the different models are mapped to. We describe the different mappings and discuss potential and limitations of the transformations.

关键词： Visual languages

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Implementation and evaluation of EduBingo for arithmetic drill

Implementation and evaluation of EduBingo for arithmetic dri...

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DIGITEL 2007: 1st IEEE International Workshop on Digital Game and Intelligent Toy Enhanced Learning

作者： Chang, Sung-Bin Deng, Yi-Chan Cheng, Hercy N. H. Liao, Hui-Chun Yu, Fu-N Chan, Tak-Wai Dep. of Computer Science and Information Engineering National Central University Taiwan Institute of Education National Cheng Kung University Taiwan Graduate Institute of Network Learning Technology National Central University Taiwan

ISBN: (纸本)0769528015

Bingo is a universally known, popular, and easy-toplay game. Following Bingo rules with some modifications, we have designed and implemented a game, called EduBingo, for practicing mathematics fractions. The game was implemented and experimented in a 'one-to-one' technology enhanced classroom, where every student learns with a wireless enabled computing device. The experiment investigated students' preferences, system usability, as well as the effects on their affective states of a grade 4 class with 22 students. The result of the questionnaire indicates that the usability of EduBingo is acceptable and there was increase of various affective levels of the students. The data collected by the system, after analysis, implies that, for most students, accuracy and efficiency of solving fraction questions increased. The preliminary result also suggests some directions for further research. © 2007 IEEE.

关键词： Digital arithmetic

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Sending the most appropriate feedbacks to students

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WSEAS Transactions on information science and Applications 2007年第3期4卷 584-591页

作者： Kuo, Rita Hsieh, Athena Chang, Maiga Heh, Jia-Sheng Department of Electronic Engineering Chung-Yuan Christian University No.200 Chung Pei Rd. Chung Li 32023 Taiwan Dep. of Information and Computer Engineering Chung-Yuan Christian University No.200 Chung Pei Rd. Chung Li 32023 Taiwan National Science and Technology Program for e-Learning in Taiwan No.300 Jungda-Rd. Chung-Li 32001 Taiwan

It is important for students getting suitable feedback information when either they are doing or completing a learning activity. This research tries to know what kind of feedback message is really useful to students. For this purpose, this paper develops a workable e-learning environment with feedback mechanism to gather the learning effects of students with different kinds of feedbacks. The experiment involves five fifth-grade classes and divides five classes into three different groups. The students in the control group have no feedback and students in the other two groups have different kinds of feedback messages. The analysis of experiment data contains two parts: the first one evaluates the feedback efficiencies for all groups;and, then all students will be separated into three clusters based on their academic achievement in order to do further analysis.

关键词： Feedback

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Design and implementation of the PLC control lab using GSM system

Design and implementation of the PLC control lab using GSM s...

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6th International Conference on Advanced Learning Technologies, ICALT 2006

作者： Wu, Ping-Huang Lin, Chin-Chung Kuo, Chin-Hwa Wu, Pei-Lin Department of Electrical Engineering TungNan Institute of Technology Taiwan Dep. of Computer Science and Information Engineering Tamkamg University Taiwan Department of Information Computer Education National Taiwan Normal University Taiwan

ISBN: (纸本)0769526322

It has become a trend to integrate automatic industries via Internet and wireless applications over network. Along with the advancement of technology development, research on wireless applications and remote control has become significant and popular today. Thus, we have designed and implemented a teaching platform with wireless applications and remote control using GSM system in the Mobile-PLC (M-PLC) control lab. The integration of the mobile control and measurement using the GSM Short Message Service (SMS) provides a teaching platform where students can learn anytime and anywhere. We can monitor machine operations using GSM system. The usability and economy of teaching media is apt, since cell phones are cheap, easy to operate and portable. © 2006 IEEE.

关键词： Programmable logic controllers

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Reducing reconfiguration time of reconfigurable computing systems in integrated temporal partitioning and physical design framework 20

Reducing reconfiguration time of reconfigurable computing sy...

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20th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2006

作者： Mehdipour, Farhad Zamani, Morteza Saheb Ahmadifar, Hamid Reza Sedighi, Mehdi Murakami, Kazuaki Amirkabir University of Technology IT and Computer Engineering Department #424 Hafez Ave. Tehran Iran Kyushu University Dep. of Informatics Graduate School of Information Science and Electrical Engineering Fukuoka Japan Guilan University Engineering Faculty Rasht Iran

ISBN: (纸本)1424400546

In reconfigurable systems, reconfiguration latency is a very important factor impact the system performance. In this paper, a framework is proposed that integrates the temporal partitioning and physical design phases to perform a static compilation process for reconfigurable computing systems. A temporal partitioning algorithm is proposed which attempts to decrease the time of reconfiguration on a partially reconfigurable hardware, This algorithm attempts to find similar single or pair of operations between subsequent partitions. Considering similar pairs instead of single nodes brings about less complexity for routing process. By using this technique, smaller reconfiguration bit-stream is obtained, which directly decreases the reconfiguration overhead time at the run-time. A complementary algorithm attempts to increase the similarity of subsequent partitions by searching for similar pairs and using a technique called dummy node insertion, An incremental physical design process based on similar configurations produced in the partitioning stage improves the metrics over iterations. © 2006 IEEE.

关键词： computer systems

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An adjustable hot-video broadcasting scheme

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WSEAS Transactions on Communications 2006年第5期5卷 832-839页

作者： Yang, Hung-Chang Yu, Hsiang-Fu Tseng, Li-Ming Chen, Yi-Ming Dep. of Computer Science and Information Engineering National Central University Chungli Taoyuan Taiwan Computer Center National Central University Chungli Taoyuan Taiwan Dep. of Information Management National Central University Chungli Taoyuan Taiwan

With the popularity of video broadcasting service on Internet, many significant broadcasting schemes were proposed to reduce the clients' waiting time. These schemes mostly require clients to receive video segments altogether from all channels. As a result, clients with limited bandwidth, such as XDSL, cannot enjoy video-broadcasting services. To overcome this problem, this work proposes the adjustable interleaving staircase-harmonic broadcasting scheme (AISHB), which offers a tradeoff between any two of three resources: server bandwidth, client buffer spaces, and client bandwidth. When client bandwidth is not limited, the scheme requires a client to buffer only 25% of a playing video and the waiting time is slightly higher than the optimal waiting time. In comparison with the fast broadcasting, recursive frequency-splitting, and harmonic broadcasting, AISHB saves the buffer requirements by 50%, 33%, and 33%. If client bandwidth is restricted, AISHB achieves the smallest waiting time among all currently known broadcasting schemes.

关键词： Broadband networks

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Compact Genetic Algorithm for Performance Improvement in Hierarchical Sensor Networks Management

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Journal of Interconnection Networks 2006年第1期7卷 101-115页

作者： Ming-Hui Jin D. Frank Hsu Cheng-Yan Kao Dep. of Computer Science and Information Engineering National Taiwan University Taipei Taiwan ROC Dep. of Computer and Information Sciences Fordham University LL813 New York NY 10023 U. S. Institute of Information Industry Taipei Taiwan ROC

This paper introduces a novel scheduling problem called the active interval scheduling problem in hierarchical wireless sensor networks for long-term periodical monitoring applications. To improve the report sensitivity of the hierarchical wireless sensor networks, an efficient scheduling algorithm is desired. Therefore, in this paper, we propose a compact genetic algorithm (CGA) to optimize the solution quality for sensor network maintenance. The experimental result shows that the proposed CGA brings better solutions in acceptable calculation time.

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