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Surface Reconstruction Based On Lower Dimensional Localized Delaunay Triangulation, Gopi Meenakshisundaram Jan 2000

Surface Reconstruction Based On Lower Dimensional Localized Delaunay Triangulation, Gopi Meenakshisundaram

Link Foundation Modeling, Simulation and Training Fellowship Reports

We present a fast, memory efficient algorithm that generates a manifold triangular mesh S passing through a set of unorganized points Pc R3. Nothing is assumed about the geometry, topology or presence of boundaries in the data set except that P is sampled from a real manifold surface. The speed of our algorithm is derived from a projection-based approach we use to determine the incident faces on a point. We define our sampling criteria to sample the surface and guarantee a topologically correct mesh after surface reconstruction for such a sampled surface. We also present a new algorithm to find …

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Image-Driven Simplification And Optimization Of Polygonal Models, Peter Lindstrom Jan 2000

Image-Driven Simplification And Optimization Of Polygonal Models, Peter Lindstrom

Link Foundation Modeling, Simulation and Training Fellowship Reports

Model simplification is often used in computer graphics to reduce the complexity of large polygonal models. For many graphics applications, the goal of this process is to produce a coarser model that is visually similar to the original, allowing the complex original model to be replaced with little or no loss in perceived quality. Existing simplification techniques, however, rely on geometry-based heuristics as an indirect indicator of visual similarity. We propose a novel image-driven simplification method that uses rendered images of a model and an image metric as a means of measuring visual similarity. Using this approach, changes in appearance …

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Main Issues Rural Women Experience With Information & Communication Technology, Teresa Maiolo Jan 2000

Main Issues Rural Women Experience With Information & Communication Technology, Teresa Maiolo

All other publications

This brief report will outline the main issues rural women encountered with information and communications technology. This information was derived from interviewing twenty-one rural women from the South West, Eastern Goldfields, Murchison, Gascoyne, and Kimberley regions of Western Australia.

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Lsmac And Lsnait: Two Approaches For Cluster-Based Scalable Web Servers, Xuehong Gana, Trevor Schroeder, Steve Goddard, Byrav Ramamurthy Jan 2000

Lsmac And Lsnait: Two Approaches For Cluster-Based Scalable Web Servers, Xuehong Gana, Trevor Schroeder, Steve Goddard, Byrav Ramamurthy

School of Computing: Conference and Workshop Papers

Server responsiveness and scalability are more important than ever in today’s client/server dominated network environments. Recently, researchers have begun to consider cluster-based computers using commodity hardware as an alternative to expensive specialized hardware for building scalable Web servers. In this paper, we present performance results comparing two cluster-based Web servers based on different server infrastructures: MAC-based dispatching (LSMAC) and IP-based dispatching (LSNAT). Both cluster-based server systems were implemented as application-space programs running on commodity hardware. We point out the advantages and disadvantages of both systems. We also identify when servers should be clustered and when clustering will not improve performance.

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Virtual Topology Reconfiguration Of Wavelength-Routed Optical Wdm Networks, Byrav Ramamurthy, Ashok Ramakrishnan Jan 2000

Virtual Topology Reconfiguration Of Wavelength-Routed Optical Wdm Networks, Byrav Ramamurthy, Ashok Ramakrishnan

School of Computing: Conference and Workshop Papers

The bandwidth requirements of the Internet are increasing every day and there are newer and more bandwidth-thirsty applications emerging on the horizon. Wavelength division multiplexing (WDM) is the next step towards leveraging the capabilities of the optical fiber, especially for wide-area backbone networks. The ability to switch a signal at intermediate nodes in a WDM network based on their wavelengths is known as wavelength-routing. One of the greatest advantages of using wavelength-routing WDM is the ability to create a virtual topology different from the physical topology of the underlying network. This virtual topology can be reconfigured when necessary, to improve …

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Optical Communication Networks For The Next-Generation Internet, Arun K. Somani, Byrav Ramamurthy Jan 2000

Optical Communication Networks For The Next-Generation Internet, Arun K. Somani, Byrav Ramamurthy

School of Computing: Faculty Publications

Computer and telecommunication networks are changing the world dramatically and will continue to do so in the foreseeable future. The Internet, primarily based on packet switches, provides very flexible data services such as e-mail and access to the World Wide Web. The Internet is a variable-delay, variable- bandwidth network that provides no guarantee on quality of service (QoS) in its initial phase. New services are being added to the pure data delivery framework of yesterday. Such high demands on capacity could lead to a “bandwidth crunch” at the core wide-area network, resulting in degradation of service quality. Fortunately, technological innovations …

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Exploiting Don't Cares To Enhance Functional Tests, Mark W. Weiss, Sharad C. Seth, Shashank K. Mehta, Kent L. Einspahr Jan 2000

Exploiting Don't Cares To Enhance Functional Tests, Mark W. Weiss, Sharad C. Seth, Shashank K. Mehta, Kent L. Einspahr

School of Computing: Conference and Workshop Papers

In simulation based design verification, deterministic or pseudo-random tests are used to check functional correctness of a design. In this paper we present a technique generating tests by specifying the don’t care inputs in the functional specifications so as to improve their coverage of both design errors and manufacturing faults. The don’t cares are chosen to maximize sensitization of signals in the circuit. The tests generated in this way require only a fraction of pseudo-exhaustive test patterns to achieve a high multiplicity of fault coverage.

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Measurements Of The Structure Of Quark And Gluon Jets In Hadronic Z Decays, R. Barate, M. Thulasidas Jan 2000

Measurements Of The Structure Of Quark And Gluon Jets In Hadronic Z Decays, R. Barate, M. Thulasidas

Research Collection School Of Computing and Information Systems

An experimental investigation of the structure of identified quark and gluon jets is presented. Observables related to both the global and internal structure of jets are measured; this allows for tests of QCD over a wide range of transverse momentum scales. The observables include distributions of jet-shape variables, the mean and standard deviation of the subjet multiplicity distribution and the fragmentation function for charged particles. The data are compared with predictions of perturbative QCD as well as QCD-based Monte Carlo models. In certain kinematic regions the measurements are sensitive mainly to perturbatively calculable effects, allowing for a test of QCD. …

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Search For R-Parity Violating Decays Of Supersymmetric Particles In E+E- Collisions At Centre-Of-Mass Energies Near 183 Gev, R. Barate, M. Thulasidas Jan 2000

Search For R-Parity Violating Decays Of Supersymmetric Particles In E+E- Collisions At Centre-Of-Mass Energies Near 183 Gev, R. Barate, M. Thulasidas

Research Collection School Of Computing and Information Systems

Searches for pair-production of supersymmetric particles under the assumption that R-parity is violated via a single dominant LLE¯LLE¯, LQD¯LQD¯ or U¯D¯D¯U¯D¯D¯ coupling are performed using the data collected by the ALEPH collaboration at centre-of-mass energies of 181–184 GeV. The observed candidate events in the data are in agreement with the Standard Model expectations. Upper limits on the production cross-sections and lower limits on the masses of charginos, sleptons, squarks and sneutrinos are derived.

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Study Of Charm Production In Z Decays, R. Barate, M. Thulasidas Jan 2000

Study Of Charm Production In Z Decays, R. Barate, M. Thulasidas

Research Collection School Of Computing and Information Systems

The production rates of D∗±D∗±, D∗±sDs∗±, D±D±, D0/D¯0D0/D¯0, D±sDs±, and Λ+c/Λ¯−cΛc+/Λ¯c− in Z→cc¯Z→cc¯ decays are measured using the LEP I data sample recorded by the ALEPH detector. The fractional energy spectrum of the D∗±D∗± is well described as the sum of three contributions: charm hadronisation, b hadron decays and gluon splitting into a pair of heavy quarks. The probability for a c quark to hadronise into a D∗+D∗+ is found to be f(c→D∗+)=0.233±0.010(stat.)±0.011(syst.)f(c→D∗+)=0.233±0.010(stat.)±0.011(syst.). The average fraction of the beam energy carried by D∗±D∗± mesons in Z→cc¯Z→cc¯ events is measured to be ⟨XE(D∗±)⟩cc¯=0.4878±0.0046(stat.)±0.0061(syst.).⟨XE(D∗±)⟩cc¯=0.4878±0.0046(stat.)±0.0061(syst.). The D∗±D∗± energy and the hemisphere mass imbalance …

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An Integrated Data Mining System To Automate Discovery, Cecil Chua, Roger Hsiang-Li Chiang, Ee Peng Lim Jan 2000

An Integrated Data Mining System To Automate Discovery, Cecil Chua, Roger Hsiang-Li Chiang, Ee Peng Lim

Research Collection School Of Computing and Information Systems

Many data analysts require tools which can integrate their database management packages (e.g. Microsoft Access) with their data analysis ones (e.g. SAS, SPSS), and provide guidance for the selection of appropriate mining algorithms. In addition, the analysts need to extract and validate statistical results to facilitate data mining. In this paper, we describe an integrated data mining system called the Linear Correlation Discovery System (LCDS) that meets the above requirement. LCDS consists of four major sub-components, two of which, the selection assistant and the statistics coupler, are discussed in this paper. The former examines the schema and instances to determine …

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Solving A Supply Chain Optimization Problem Collaboratively, Hoong Chuin Lau, A. L. C. Lim, Q Liu Jan 2000

Solving A Supply Chain Optimization Problem Collaboratively, Hoong Chuin Lau, A. L. C. Lim, Q Liu

Research Collection School Of Computing and Information Systems

We propose a novel algorithmic framework to solve an integrated planning and scheduling problem in supply chain management. This problem involves the integration of an inventory management problem and the vehicle routing problem with time windows, both of which are known to be NP-hard. Under this framework, algorithms that solve the underlying sub-problems collaborate rigorously yet in a computationally efficient manner to arrive at a good solution. We will then present two algorithms to solve the inventory management problem: a complete mathematical model integrating integer programming with constraint programming, and an incomplete algorithm based on tabu search. We present experimental …

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Information Technology In The Health Care Industry: A Primer, P. Southard, S. J. Hong, Keng Siau Jan 2000

Information Technology In The Health Care Industry: A Primer, P. Southard, S. J. Hong, Keng Siau

Research Collection School Of Computing and Information Systems

The paper discusses current and future applications of information technology within the healthcareindustry. It presents some broad strategies for approaching information technology investments and various tools available.

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E-Commerce Systems Development Methodologies, M. Rossi, Keng Siau, S. Purao Jan 2000

E-Commerce Systems Development Methodologies, M. Rossi, Keng Siau, S. Purao

Research Collection School Of Computing and Information Systems

Methodologies. This is the first time we organize this new minitrack on electronic commerce systems development. The flexibility, scalability, user-friendliness, privacy, security, intuitiveness, and other important characteristics of electronic commerce systems make the systems development process of such systems very multifaceted and complex. Today, most electronic commerce systems are built based on intuition and rule of thumbs.Many practitioners have the misconception that there is no need for a systematic modeling and design technique for these systems. The lack of appropriate methods and methodologies to support electronic commerce systems development is another stumbling block. Most of the widely used methods are …

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Persistence Differences In Community College Courses Taught In Classrooms And Through Alternative Formats, Andrew A. Runyan Jan 2000

Persistence Differences In Community College Courses Taught In Classrooms And Through Alternative Formats, Andrew A. Runyan

CCAC Theses and Dissertations

While distance education programs continue to expand, the occurrence of higher dropout rates in those programs as compared to the same courses offered in lecture/lab settings remains a point of contention between supporters and detractors of non-traditional forms of education. This study used a foundation of research on dropout in higher education as the basis for an investigation of dropout rates in non-traditional forms of instruction in a community college setting. Course delivery formats studied included videotape-based courses, Internet-based courses, and courses offered in a self-paced laboratory environment. For each of these formats, the same course, offered in a lecture/lab …

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An Efficient Algorithm To Determine The Periodic Steady-State Solutions Of Nonlinear Systems Using Extended Spectral Analysis, Gülay Tohumoğlu Jan 2000

An Efficient Algorithm To Determine The Periodic Steady-State Solutions Of Nonlinear Systems Using Extended Spectral Analysis, Gülay Tohumoğlu

Turkish Journal of Electrical Engineering and Computer Sciences

A new method for the solution of nonlinear periodic systems was developed. It avoids the time domain calculations of the whole network equations. In the proposed method, by forming the augmented network as linear and nonlinear subnetworks these subnetworks are formulated in complex frequency and time domain respectively. Using spectral analysis the steady-state periodic solution of the whole nonlinear network is reached by an iterative approach. The method can be applied efficiently to weak and strong nonlinear circuits equally well. When we divide the network into a large linear subnetwork and a small nonlinear subnetwork, this method can be applied …

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Adaptive Object-Oriented Filtering Framework For Event Management Applications, Ehab Al-Shaer, Mohamed Fayad, Hussein Abdel-Wahab, Kurt Maly Jan 2000

Adaptive Object-Oriented Filtering Framework For Event Management Applications, Ehab Al-Shaer, Mohamed Fayad, Hussein Abdel-Wahab, Kurt Maly

Computer Science Faculty Publications

Event filtering is an essential element in event management applications. In event management environments, the filtering mechanisms are employed to track the events generated from applications at run-time and perform the corresponding appropriate actions. Several key applications domains, such as system and network management, distributed system toolkits, communication protocols and active databases, utilize event filtering for various management purposes. The goal of this paper is to describe the object-oriented design and implementation of an adaptive event filtering framework which can be integrated and reused efficiently to develop event management applications for various domain environments. In our approach, the event filtering …

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The Ups Prototype: An Experimental End-User Service Across E-Print Archives, Herbert Van De Sompel, Thomas Krichel, Michael L. Nelson, Patrick Hochstenbach, Victor Lyapunov, Kurt Maly, Mohammad Zubair, Mohamed Kholief, Xiaoming Liu, Heath O'Connell Jan 2000

The Ups Prototype: An Experimental End-User Service Across E-Print Archives, Herbert Van De Sompel, Thomas Krichel, Michael L. Nelson, Patrick Hochstenbach, Victor Lyapunov, Kurt Maly, Mohammad Zubair, Mohamed Kholief, Xiaoming Liu, Heath O'Connell

Computer Science Faculty Publications

A meeting was held in Santa Fe, New Mexico, October 21-22, 1999, to generate discussion and consensus about interoperability of publicly available scholarly information archives. The invitees represented several well known e-print and report archive initiatives, as well as organizations with interests in digital libraries and the transformation of scholarly communication. The central goal of the meeting was to agree on recommendations that would make the creation of end-user services -- such as scientific search engines and linking systems -- for data originating from distributed and dissimilar archives easier. The Universal Preprint Service (UPS) Prototype was developed in preparation for …

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The Incident Dispatching And Tracking System, Thomas J. Braden Jan 2000

The Incident Dispatching And Tracking System, Thomas J. Braden

UNF Graduate Theses and Dissertations

The Incident Dispatching and Tracking System (IDTS) was developed to facilitate the technical support of an organization. IDTS provides a means by which a user may submit their issue/problem to the system and receive a unique trouble ticket number. This number can then be used to view the status of that record, minimizing the need for inquiries to the technical support team. IDTS also provides a dispatching function that assigns each trouble ticket to a technician that specializes in that type of issue. Finally, there is a reporting function that allows the technical support team to view the current technical …

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Development Of Object Oriented Components For Atm Network Simulation With Emphasis On Congestion Control, Wen Dee Lee Jan 2000

Development Of Object Oriented Components For Atm Network Simulation With Emphasis On Congestion Control, Wen Dee Lee

Student Works (2000-2009)

Asynchronous Transfer Mode (ATM) provides the required flexibility for the support of heterogeneous services for Broadband Integrated Services Digital Networks (8-ISDN) environment. A TM has proven to be efficient and flexible in handling a wide range of integrated service traffic. The most outstanding feature of ATM is that it provides the Quality of Service (QoS) guarantees between connections. In a network environment, congestion control is an important factor to consider as to guarantee the negotiated QoS. To study, observe and develop the congestion control mechanism in an ATM network, simulation modelling provides the ideal domain. The aim of this project …

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Development Of A Reusable Object Oriented Application Framework For Library Systems Domain, Roy Teck Choye Chew Jan 2000

Development Of A Reusable Object Oriented Application Framework For Library Systems Domain, Roy Teck Choye Chew

Student Works (2000-2009)

The main goal of developing an application framework on an application domain or a business domain is to facilitate development of application systems within the same domain by reusing components through customisation and not from scratch. These components would have to be analysed and designed with reusable features so that they can be reused to develop different applications in the related domain. In the case of an object-oriented application framework in the technical view, it is made up of a set of interrelated abstract (generic) and concrete classes that underlie the components of a domain model and form the domain …

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Factor Criteria Metric (Fcm) For Requirements Analysis Phase In The Development Of Management Information Systems, Wei Yin Chew Jan 2000

Factor Criteria Metric (Fcm) For Requirements Analysis Phase In The Development Of Management Information Systems, Wei Yin Chew

Student Works (2000-2009)

This project establishes a way to measure a characteristic of a product and a characteristic of a process involved in the requirements analysis phase for the development of management information systems (M!Ss) by adapting and enhancing McCall's Factor Criteria Metric (FCM) model. The two selected characteristics are the understandability of a software requirements specification (SRS) and effectiveness of a requirements gathering interview (RGI). To define the measurement for these two characteristics, a structure of factors, criteria, checklists and metrics for the characteristics of the products and processes is established based on McCall's FCM model. In addition, a software tool, FCMware, …

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Evaluation Of Academic Library Web Sites In Malaysia, Kee Hiong Lee Jan 2000

Evaluation Of Academic Library Web Sites In Malaysia, Kee Hiong Lee

Student Works (2000-2009)

Academic libraries have dynamically created Web sites on the World Wide Web. However, they have to keep the content and design of their Web sites in line with their missions. Currently, there is lack of a mixed-method approach that combines both quantitative and qualitative analyses for academic library Web sites evaluation and integration of results. This study evaluates the content and design of academic library Web sites in Malaysia by using a mixed-method approach. A total of twelve library Web sites of public and private institutions of higher learning in Malaysia are selected for evaluation. For qualitative analysis, a matrix …

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Enhanced Password-Based Authentication Protocol, Chee Kiam Lee Jan 2000

Enhanced Password-Based Authentication Protocol, Chee Kiam Lee

Student Works (2000-2009)

This dissertation introduces Enhanced Password-Based Authentication Protocol (E­PAP) System. E-PAP System combines asymmetric (public-key) and symmetric (secret-key) cryptography that allow two parties sharing a small shared secret to provide authentication service, exchange confidential and authenticated information over an insecure network like lntemet. E-PAP System also provides authentication service by using somelhing you know concept. It has some advantages over biometric which uses something you are concept and smancard that uses something you have concept, as it is free of equipment's physical limitations, accuracy and cost problem as well as other constraints. The core for E-PAP System is FreeSPEKE SDK, a …

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E-Jurnal Ilmiah Di Malaysia : Status Dan Sikap Ahli Akademik, Roosfa Hashim Jan 2000

E-Jurnal Ilmiah Di Malaysia : Status Dan Sikap Ahli Akademik, Roosfa Hashim

Student Works (2000-2009)

Sejak American Association for the Advancement of Science mcnerbitkan The Online Journal Current Clinical Trial pada 1992, muncul pada hari ini ribuan e-jurnal di Internet dalam pelbagai bidang dan bahasa dan dari pelbagai negara di segenap penjuru dunia. Internet menyediakan medium baru kepada para sarjana dalam semua bidang untuk melapor penemuan terbaru mereka secara pantas, mudah, murah dan tersebar luas. Kajian ini bertujuan untuk mengkaji kedudukan terkini e-jurnal di negara ini. Kajian ini penting bagi mengetahui status penerbitan e-jurnal ilmiah di ncgara ini serta penerimaan sarjana kita terhadapnya. Persoalan yang ingin dijawab adalah: Apakah judul-judul jurnal Malaysia yang sedang beredar …

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Dynamic Modeling Of Cell Flow For An Atm Network, Sok Kem Tay Jan 2000

Dynamic Modeling Of Cell Flow For An Atm Network, Sok Kem Tay

Student Works (2000-2009)

This project is to study dynamic modeling of cell flow for an A TM network using Simulink tools. The A TM network consists of a maximum of four nodes configured into single hop, multi hop, ring, mesh and star topology. The dynamic simulation will examining the cell flow (bit per second), cell dropped cell received and link utilization for above topology.

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Disaster Recovery Planning : Local And Remote Data Backup System, Chin Seng Low Jan 2000

Disaster Recovery Planning : Local And Remote Data Backup System, Chin Seng Low

Student Works (2000-2009)

This dissertation studies about the disaster recovery planning focusing on data backup and which there is a data recovery capability in the event of a sudden, severe and unplanned disruption in an organization with network computing environment. The planning must ensure continuity of all the critical data and functions with minimum disruption and recover quickly during such calamity. The elements of a comprehensive and complete disaster recovery planning must include risk analysis, business impact analysis in order to recommend a suitable disaster recovery strategy. Hence, Local and Remote Data Backup System is the designed strategy based on the literature review …

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Development Of Object Oriented Components For Atm Network Simulation With Emphasis On Switch Architecture, Meng Kiat Gan Jan 2000

Development Of Object Oriented Components For Atm Network Simulation With Emphasis On Switch Architecture, Meng Kiat Gan

Student Works (2000-2009)

Asynchronous Transfer Mode (ATM) is considered to be the foundation on which B­ISON is to be built. It is the new generation of communication protocol that being deployed throughout the telecommunication industry. An important component of this communication networks is the ATM switch whose basic functions are to direct cells from input port to output port and to buffer cell destined to the same output port from different input port. Understanding an ATM switch before building it, is a challenging task as one must consider the design of switching architecture and cell buffering at the same time. As the switching …

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Coordination And Mobility, Gruia-Catalin Roman, Amy L. Murphy, Gian Pietro Picco Jan 2000

Coordination And Mobility, Gruia-Catalin Roman, Amy L. Murphy, Gian Pietro Picco

All Computer Science and Engineering Research

Mobility entails the study of systems in which components change location, in a voluntary or involuntary manner, and move across a space that may be defined to be either logical or physical. Coordination is concerned with what happens when two or more components come in contact with each other. In this paper we put forth a working definition of coordinatoin, we construct argumetns that demonstrate that coordination is central to understanding mobility, we explore the intellectual richness of the notion of coordination, and we consider the practical implications of coordination-centered system design strategies. We develop these ideas in two steps. …

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Configuring Sessions In Programmable Networks, Sumi Choi, Jonathan Turner, Tilman Wolf Jan 2000

Configuring Sessions In Programmable Networks, Sumi Choi, Jonathan Turner, Tilman Wolf

All Computer Science and Engineering Research

The provision of advanced computational services within networks is rapidly becoming both feasible and economical. We present a general approach to the problem of configuring application sessions that require intermediate processing by showing how the session configuration problem can be transformed to a conventional shortest path problem. We show, through a series of examples, that the method can be applied to a wide variety of different situations.

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