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Empirical study on an online assessment system: Skill Assessment Management System (SAM)

WSEAS Transactions on Systems 2007年第2期6卷 356-364页

作者： Bai, Xue Cao, Jordan Cui, Yingjin Department of Computer Information Systems School of Business Virginia State University 1 Hayden Drive Petersburg VA 23806 United States Department of Computer Science and Quantitative Methods College of Business Administration Winthrop University Rock Hill SC 29733 United States Department of Computer Information Systems Virginia State University 1 Hayden Drive Petersburg VA 23806 United States

Skill Assessment Management System (SAM) has been popularly accepted by educational institutions. However, there has been little effort in previous studies using advanced statistical models to evaluate and therefore possibly to improve this system. In order to improve quality of existing systems, our effort aimed at identifying important predictors of students' satisfaction. In this study, the principal component analysis and logistic regression models were built to identify important predictors. It was found that "effectiveness of the assessment system", "getting help to use the system in class", "system performance" and "responsiveness" were associated with students' satisfaction. The logistic regression model and correlation analysis indicated that the predictors "effectiveness of the assessment system" and "getting help to use the system in class" had strong effects on students' satisfaction. The survey instrument was tested for reliability and validity.

关键词： Online systems

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A Light-weight Security Protocol for RFID System

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12th IFIP International Conference on Personal Wireless Communications, PWC 2007

作者： Oh, Jung-Hyun Kim, Hyim-Seok Choi, Jin-Young Computer Theory and Formal Methods Lab Dept. Of Computer Science and Engineering Korea Unversity 5-1 Anam dong Sungbuk gu Seoul 136-701 Korea Republic of

ISBN: (纸本)9780387741581

RFID is automatic object identifying technology via radio frequency. And its application areas are un-describable for its convenience and pervasiveness. However, because the communication channel between the verifier and the tag is wireless, serious privacy problems such as the data leakage and the data traceability can be occur. Without resolving these privacy problems, RFID system cannot be adapted fully in any area. Many kinds of security protocols have been proposed to resolve these problems. However, previous proposals did not satisfy security requirements and still leaved vulnerabilities. In this paper, we describe the security vulnerabilities of previous works for RFID systems. Finally, we propose a security protocol which based on one-time pad scheme using random nonce and shared secret values. The proposed protocol satisfies security requirements such as the data secrecy, data anonymity and the data authenticity between the verifier and the tag. We have proved security requirements satisfaction formally by using GNY logic.

关键词： Radio frequency identification (RFID)

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A semantic-features-calculation based model mapping approach for web information systems

A semantic-features-calculation based model mapping approach...

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SERA 2007: Fifth ACIS International Conference on Software Engineering Research, Management, and Applications

作者： Guodong, Huang Li, Chen Jinkui, Hou Department of Computer Teaching and Research Institute of Chemical Defense of PLA Beijing 102205 China Admission Office Beijing Sports University Beijing 100084 China School of Computer Science and Technology Shandong University Jinan 250061 China

ISBN: (纸本)0769528678

The transformation from platform independent models to platform specific models is a key technology in OMG's MDA. The mapping relations between different models are the foundation and basis for the transformation. By abstractly analyzing the characteristic of syntax and semantics of modeling languages, a semantic-features-calculation based model mapping approach for the development of web information systems was proposed. To using this approach, abstract target semantic model should be constructed firstly. Then, based on the idea of elements in source semantic domain being reconstructed in the target semantic domain, mapping relations from source model to target model are made via abstract target semantic model. This approach may not only to be a theoretical guidance for model transformation, but also can be a measurement for validating the mapping rules between models at different abstract levels. JavaServer Faces assisted with Enterprise JavaBeans was used as a target platform to help interpreting the process of using this approach. © 2007 IEEE.

关键词： Semantic Web

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Use of radial basis functions and rough sets for evolutionary multi-objective optimization

Use of radial basis functions and rough sets for evolutionar...

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1st IEEE Symposium of Computational Intelligence in Multicriteria Decision Making

作者： Santana-Quintero, Luis V. Serrano-Hernandez, Victor A. Coello Coello, Carlos A. Hernandez-Diaz, Alfredo G. Molina, Julian CINVESTAV-IPN (Evolutionary Computation Group) Computer Science Department Mexico Dept. of Quantitative Methods Pablo de Olavide University Spain Dept. of Applied Economics (Mathematics) University of Málaga Spain

ISBN: (纸本)9781424407026

This paper presents a new multi-objective evolutionary algorithm (MOEA) which adopts a radial basis function (RBF) approach in order to reduce the number of fitness function evaluations performed to reach the Pareto front. The specific method adopted is derived from a comparative study conducted among several RBFs. In all cases, the NSGA-II (which is an approach representative of the state-of-the-art in the area) is adopted as our search engine with which the RBFs are hybridized. The resulting algorithm can produce very reasonable approximations of the true Pareto front with a very low number of evaluations, but is not able to spread solutions in an appropriate manner. This led us to introduce a second stage to the algorithm in which it is hybridized with rough sets theory in order to improve the spread of solutions. Rough sets, in this case, act as a local search approach which is able to generate solutions in the neighborhood of the few nondominated solutions previously generated. We show that our proposed hybrid approach only requires 2,000 fitness function evaluations in order to solve test problems with up to 30 decision variables. This is a very low value when compared with today's standards reported in the specialized literature.

关键词： Multiobjective optimization

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Inquiry-learning with WebLab: Undergraduate attitudes and experiences

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Journal of science Education and Technology 2007年第4期16卷 337-348页

作者： Fischer, Judith Mitchell, Rudolph Del Alamo, Jesus Teaching and Learning Laboratory MIT Building 5-122 Cambridge MA 02139 77 Massachusetts Ave United States Department of Electrical Engineering and Computer Science MIT Cambridge MA United States

The Microelectronics WebLab at MIT allows students to do actual (not simulated) laboratory research on state-of-the art equipment through the Internet. This study assesses the use of WebLab in a junior-level course on microelectronic devices and circuits in 2004-05 and 2005-06. In quantitative surveys and qualitative interviews, students and faculty reported that WebLab was effective as an instrument of learning, and grew more so with refinements of the program. WebLab allowed undergraduates to learn at their own pace and on their own schedules. It enabled them to use different processes of learning (intuitive, visual, abstract), and it gave them an opportunity to link individual and collaborative effort in creative combinations. Online laboratories on this model have broad applications in the experimental sciences and in other research-oriented disciplines. © 2007 Springer science+Business Media, LLC.

关键词： Assessment Engineering education Inquiry learning Microelectronics Online laboratories WebLab

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Prisoner’s dilemma applied and in the classroom: The TV game show Friend or Foe

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PRIMUS 2007年第1期17卷 24-35页

作者： Coe, Paul R. Alonzi, Loreto Peter Condon, Daniel Butterworth, William T. Associate Professor of Mathematics and Chair Department of Mathematics and Computer Science Dominican University. Professor of Economics and Finance Dominican University. Professor of Economics and Quantitative Methods Dominican University. Associate Professor of Mathematics DePaul University Chicago

Prisoner’s Dilemma is a common game theory scenario in which two players must choose between acting cooperatively or out of pure self-interest. What a player decides affects not only his own outcome but also that of the other player. Friend or Foe, a TV game show that has appeared on the cable Game Show Network (GSN), places pairs of contestants in a situation similar to Prisoner’s Dilemma. After working together to accumulate money into a “trust fund,” the two teammates divide their winnings, or not, based on their individual decisions to be a Friend to their teammate or a Foe. We have collected data on the contestants and their behavior from 36 episodes of the show. In this paper we describe how the game show is played, what game theory says about the way that the contestants should act, and how they actually did act on the 36 episodes. We also present an example of how Friend or Foe can be used in a classroom setting not only to introduce game theory but also to review previous course material. © 2007 Taylor & Francis Group, LLC.

关键词： Classroom usage Friend or Foe Game theory Prisoner’s dilemma TV game show

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An Incremental Approach for Niching and Building Block Detection via Clustering

An Incremental Approach for Niching and Building Block Detec...

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International Conference on Intelligent Systems Design and Applications (ISDA)

作者： Leonardo Ramos Emmendorfer Aurora Trinidad Ramirez Pozo Numerical Methods in Engineering Federal University of Paraná (UFPR) Brazil Department of Computer Science Federal University of Parandá Brazil

Diversity preservation has already been established as an important concern for evolutionary computation. Clustering techniques were, among others, successfully applied to this purpose. Another important aspect of the research on evolutionary computation is related to linkage learning - the detection of the problem structure avoiding disruption of building blocks when new individuals are generated. This paper presents a novel approach which is a new estimation of distribution algorithm (EDA) where clustering plays two roles: diversity preservation and linkage learning. Initial empirical investigations illustrate the behavior of the algorithm when solving two benchmark optimization problems.

关键词： Evolutionary computation Couplings Clustering algorithms Electronic design automation and methodology

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The regulation of gene expression in E-cell

The regulation of gene expression in E-cell

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3rd International Conference on Natural Computation, ICNC 2007

作者： Xinhua, Lu Jigui, Sun Ying, Ren Shuai, Lu College of Computer Science and Technology Jilin University Changchun 130012 China Key Laboratory of Symbolic Computation and Knowledge Engineering Ministry of Education Jilin University Changchun 130012 China Public Teaching Center Heping Division Jilin University Changchun 130012 China

ISBN: (纸本)0769528759

Gene expression is the transformational procedure from genetic information of genome to proteome which affect the life activities of cells. The Regulation of gene expression determines the structure, quantity and functions of proteome. Existing electronic cell (E-Cell) models seldom relate to simulation on the regulations of gene expressions. In this paper, the E-Cell model we propose, named Analog-Cell, in order to reappear the life activities of cells and discover new biological rules, simulates the main regulation mechanisms in gene expression through defining regulation factors, enzymes and rational reaction rules, thus Analog-Cell obtains recommendable simulative results. © 2007 IEEE.

关键词： Gene expression

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Considering context: A study of first-year engineering students

Considering context: A study of first-year engineering stude...

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作者： Kilgore, Deborah Atman, Cynthia J. Yasuhara, Ken Barker, Theresa J. Morozov, Andrew Center for Engineering Learning and Teaching University of Washington Computer Science and Engineering University of Washington Industrial Engineering University of Washington Educational Psychology University of Washington University of Washington CELT Box 352183 Seattle WA 98195-2180 University of Washington Box 352650 Seattle WA 98195

High-quality engineering design requires an understanding of how the resulting engineered artifact interacts with society, the natural environment, and other aspects of context. This study examines how first-year engineering undergraduates approached two engineering design tasks. We focused on how much students considered contextual factors during problem-scoping, a critical part of the design process. As part of a larger, longitudinal study, we collected data from 160 students at four U.S. institutions. Students varied in their consideration of each design task's context, and women's responses were more likely to be context-oriented than men's. Overall, context-orientation was positively correlated between the two design tasks, despite differences in data collection and analysis. Having found that beginning engineering students, particularly women, are sensitive to important contextual factors, we suggest that efforts to broaden participation in engineering should consider legitimizing and fostering context-oriented approaches to engineering earlier in the curriculum.

关键词： Engineering education

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Schema Conversion from Relation to XML with Semantic Constraints

Schema Conversion from Relation to XML with Semantic Constra...

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International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Teng Lv Ping Yan College of Mathematics and System Science Xinjiang University Urumqi China Teaching and Research Section of Computer Artillery Academy of PLA Hefei China

This paper studies the schema conversion from relational schemas to XML DTDs. As functional dependencies play an important role in schema conversion process, the concept of functional dependency for XML DTDs is proposed to preserve the semantics implied by functional dependencies and keys of relational schemas. A conversion method called NeT-FD (nesting- based translation with functional dependencies) is proposed to convert relational schemas to XML DTDs in the presence of functional dependencies and keys. The method presented here can preserve the semantics implied by functional dependencies and keys of relational schemas and can convert multiple tables to XML DTDs at the same time.

关键词： XML Erbium Educational institutions Mathematics Education Web sites Relational databases Web server Tree graphs Fuzzy systems

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