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1

Electronic Resource

Active Finite Element Method for Simulating the Contraction Behavior of a Muscle-Tendon Complex (2005)

Tsui, Chi Pong ; Tang, Chak Yin ; Chow, Chi Loong ; [et al.]

s.l. ; Stafa-Zurich, Switzerland

Advanced materials research Vol. 9 (Sept. 2005), p. 9-14

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ISSN: 1662-8985

Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: A three-dimensional finite element analysis was conducted to simulate the effects of the varying material parameters on the contraction behaviors of a muscle-tendon complex using an active finite element method. The material behavior of the skeletal muscle was assumed to be orthotropic and the muscle model consists of two parts: the active and the passive parts. An active finite element method was then used for accommodating both the active and passive behaviors of the muscle into the muscle model. In this active-passive muscle model, the active component is governed by an activation level, a time period, a muscle sensitivity parameter and a strain rate. The material property of the passive component was assumed to be viscoelastic and the tendon is assumed to be linear elastic. The effects of activation amplitude and viscoelastic material parameters on the active, passive and total force-length relationship of the cat muscle under isometric contraction were predicted. The predicted results were found to be close to the experimental data reported in the available literature. Hence, the active-passive muscle model was extended to simulate the stress distribution of the cat muscle subject to shortening contraction and different activation amplitude. By varying the magnitude of the material parameters, different muscle behaviors could be generated. The proposed active finite element method lays a good foundation for simulation of human musculoskeletal motion

Type of Medium: Electronic Resource

URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.9.9.pdf

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2

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A structural and content-based analysis for Web filtering (2003)

Lee, P.Y. ; Hui, S.C. ; Fong, A.C.M.

Bingley : Emerald

Internet research 13 (2003), S. 27-37

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ISSN: 1066-2243

Source: Emerald Fulltext Archive Database 1994-2005

Topics: Computer Science

Notes: With the proliferation of objectionable materials (e.g. pornography, violence, drugs, etc.) available on the WWW, there is an urgent need for effective countermeasures to protect children and other unsuspecting users from exposure to such materials. Using pornographic Web pages as a case study, this paper presents a thorough analysis of the distinguishing features of such Web pages. The objective of the study is to gain knowledge on the structure and characteristics of typical pornographic Web pages so that effective Web filtering techniques can be developed to filter them automatically. In this paper, we first survey the existing techniques for Web content filtering. A study on the characteristics of pornographic Web pages is then presented. The implementation of a Web content filtering system that combines the use of an artificial neural network and the knowledge gained in the analysis of pornographic Web pages is also given.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1108/10662240310458350

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3

Electronic Resource

An end-to-end solution for Internet lecture delivery (2002)

Fong, A.C.M. ; Hui, S.C.

Bradford : Emerald

Campus-wide information systems 19 (2002), S. 45-51

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ISSN: 1065-0741

Source: Emerald Fulltext Archive Database 1994-2005

Topics: Computer Science

Notes: Although the Internet offers great opportunities for educational purposes, its full potential cannot be realized unless it can be used effectively for lecture delivery across vast distances. However, the best-effort nature of the current Internet means that many technical issues have to be resolved to ensure that the quality of video and audio play-out will be acceptable. Presents an end-to-end solution for Internet delivery of "live" and recorded lectures based on a one-to-many server-clients topology. The focus is on low-bandwidth technology to minimize the students' client side equipment overheads. Describes the development of an integrated quality of service control mechanism comprising both congestion control and error control and how the solution has been implemented as a Web-based learn-on-demand system. Presents a performance analysis of the system.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1108/10650740210421863

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4

Electronic Resource

A hybrid architecture design for security monitoring via the Internet (2003)

Fong, A.C.M. ; Hui, S.C.

Bingley : Emerald

Kybernetes 32 (2003), S. 1297-1312

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ISSN: 0368-492X

Source: Emerald Fulltext Archive Database 1994-2005

Topics: Computer Science

Notes: We present the development of a Web-based remote-monitoring system as an attractive alternative to the manual task of security surveillance. The system has built-in human motion analysis that can alert the security personnel when suspicious activities are detected at the monitored sites. In this paper, our focus is on the architectural design of such a system. We discuss the relative strengths and weaknesses of three different architectural approaches: centralized, distributed and hybrid, and conclude that a hybrid approach is most appropriate. Our Web-based system has been implemented for monitoring elevators (lifts) within a university environment. Objective and subjective tests have validated the effectiveness of our system. The Web-based implementation enhances ease of operation and allows users to connect to the system via a Web browser.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1108/03684920310493260

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5

Electronic Resource

A WWW‐assisted fax system for Internet fax‐to‐fax communication (1998)

Chong, L.S.K. ; Hui, S.C. ; Yeo, C.K. ; [et al.]

Springer

World wide web 1 (1998), S. 209-219

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ISSN: 1573-1413

Source: Springer Online Journal Archives 1860-2000

Topics: Computer Science

Notes: Abstract This paper describes a WWW‐assisted fax system (WAX) that is developed to provide reliable and enhanced Internet fax‐to‐fax communication. It integrates the easy‐to‐use WWW interface with conventional faxing procedures, resulting in an Internet fax system which not only circumvents the cost of long distance fax charges but also adds enhanced functionality not otherwise possible. The WAX system comprises two gateways, namely, the Fax‐In and the Fax‐Out Gateways. The Fax‐In Gateway accepts fax messages over Public Switched Telephone Network (PSTN) and stores them in a transit database. The system interfaces with the user over the WWW to provide access to his stored faxes, with the basic ability to send them out over the Internet to recipients. The Fax‐Out Gateway receives fax files from the Fax‐In Gateway through the Internet and transmits them out to the intended recipients via the local PSTN. WAX users do not require any additional hardware except for a fax machine and a personal computer with Internet connectivity to gain access to WAX via any WWW browser. In addition, WAX provides a host of other enhanced features such as the ability to construct mini‐faxes from a single incoming fax as well as dynamically attach cover notes to outgoing faxes.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1019276001097

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