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Articles 27421 - 27450 of 29965
Full-Text Articles in Entire DC Network
An Integrated Data Mining System To Automate Discovery, Cecil Chua, Roger Hsiang-Li Chiang, Ee Peng Lim
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 …
Multicast Services For Multimedia Collaborative Applications, Emad Eldin Mohamed Mohamed
Multicast Services For Multimedia Collaborative Applications, Emad Eldin Mohamed Mohamed
Computer Science Theses & Dissertations
This work aims at providing multicast services for multimedia collaborative applications over large inter-networks such as the Internet. Multimedia collaborative applications are typically of small group size, slow group membership dynamics, and awareness of participants' identities and locations. Moreover, they usually consist of several components such as audio, video, shared whiteboard, and single user application sharing engines that collectively help make the collaboration session successful. Each of these components has its demands from the communication layer that may differ from one component to another. This dissertation identifies the overall characteristics of multimedia collaborative applications and their individual components. It also …
Extending Traditional Static Analysis Techniques To Support Development, Testing And Maintenance Of Component-Based Solutions, Robert David Cherinka
Extending Traditional Static Analysis Techniques To Support Development, Testing And Maintenance Of Component-Based Solutions, Robert David Cherinka
Computer Science Theses & Dissertations
Traditional static code analysis encompasses a mature set of techniques for helping understand and optimize programs, such as dead code elimination, program slicing, and partial evaluation (code specialization). It is well understood that compared to other program analysis techniques (e.g., dynamic analysis), static analysis techniques do a reasonable job for the cost associated with implementing them. Industry and government are moving away from more ‘traditional’ development approaches towards component-based approaches as ‘the norm.’ Component-based applications most often comprise a collection of distributed object-oriented components such as forms, code snippets, reports, modules, databases, objects, containers, and the like. These components are …
Adaptive Object-Oriented Filtering Framework For Event Management Applications, Ehab Al-Shaer, Mohamed Fayad, Hussein Abdel-Wahab, Kurt Maly
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 …
State Government Cost Recovery For Electronic Information Dissemination: A Comparative Study, Donald R. Wismer
State Government Cost Recovery For Electronic Information Dissemination: A Comparative Study, Donald R. Wismer
CCAC Theses and Dissertations
Prior to this study, no paradigm common among state governments regarding public policy principles on cost recovery for the dissemination of public information had been described. The study revealed that U.S. federal government policy has served as a model from which a majority of the states have proceeded. This study has compared the states with the federal government and with themselves to determine the policy boundaries. Themes from in the literature were presented and summarized, and measurable elements were isolated. Data from statutory, regulatory, and case law, and from explicit policy statements, were gathered and compared within graphical formats. A …
Application Of Vibrational Techniques In Determination Of Dynamic Properties Of Agricultural Products-State Of The Arton Of Vibrational Techniques In Determination Of Dynamic Properties Of Agricultural Products-State Of The Art, Silas Kajuna
Tanzania Journal of Engineering and Technology (TJET)
Vibration is one of the techniques employed in the determination of dynamic properties of fruits and vegetables. It entails generation of a mechanical or acoustic vibrational signal which is propagated through the flesh of the agricultural material. A transducer is either attached or held close to the specimen to monitor the propagation of the signal through the specimen. The manner in which the signal is transmitted through the material is analyzed, and the dynamic properties of the specimen which relate to its firmness or its internal being are derived. The technique has been around for the past 30 years or …
Disclosure Detection In Multivariate Categorical Databases: Auditing Confidentiality Protection Through Two New Matrix Operators, Sumit Dutta Chowdhury, George T. Duncan, Ramayya Krishnan, Stephen F. Roehrig, Sumitra Mukherjee
Disclosure Detection In Multivariate Categorical Databases: Auditing Confidentiality Protection Through Two New Matrix Operators, Sumit Dutta Chowdhury, George T. Duncan, Ramayya Krishnan, Stephen F. Roehrig, Sumitra Mukherjee
CCE Faculty Articles
As databases grow more prevalent and comprehensive, database administrators seek to limit disclosure of confidential information while still providing access to data. Practical databases accommodate users with heterogeneous needs for access. Each class of data user is accorded access to only certain views. Other views are considered confidential, and hence to be protected. Using illustrations from health care and education, this article addresses inferential disclosure of confidential views in multidimensional categorical databases. It demonstrates that any structural, so data-value-independent method for detecting disclosure can fail. Consistent with previous work for two-way tables, it presents a data-value-dependent method to obtain tight …
Characterizations Of Classes Of Programs By Three-Valued Operators, Anthony K. Seda, Pascal Hitzler
Characterizations Of Classes Of Programs By Three-Valued Operators, Anthony K. Seda, Pascal Hitzler
Computer Science and Engineering Faculty Publications
Several important classes of normal logic programs, including the classes of acyclic, acceptable, and locally hierarchical programs, have the property that every program in the class has a unique two-valued supported model. In this paper, we call such classes unique supported model classes. We analyse and characterize these classes by means of operators on three-valued logics. Our studies will motivate the definition of a larger unique supported model class which we call the class of Phi-accessible programs. Finally, we show that the class of Phi -accessible programs is computationally adequate in that every partial recursive function can be implemented by …
On-Line Bayesian Tree-Structured Transformation Of Hidden Markov Models For Speaker Adaptation, Shaojun Wang, Yunxin Zhao
On-Line Bayesian Tree-Structured Transformation Of Hidden Markov Models For Speaker Adaptation, Shaojun Wang, Yunxin Zhao
Kno.e.sis Publications
This paper presents a new recursive Bayesian learning approach for transformation parameter estimation in speaker adaptation. Our goal is to incrementally transform (or adapt) the entire set of HMM parameters for a new speaker or new acoustic enviroment from a small amount of adaptation data. By establishing a clustering tree of HMM Gaussian mixture components, the finest affine transformation parameters for individual HMM Gaussian mixture components can be dynamically searched. The on-line Bayesian learning technique proposed in our recent work is used for recursive maximum a posteriori estimation of affine transformation parameters. Speaker adaptation experiments using a 26-letter English alphabet …
Off-Line Compression By Greedy Textual Substitution, Alberto Apostolico, Stefano Lonardi
Off-Line Compression By Greedy Textual Substitution, Alberto Apostolico, Stefano Lonardi
Department of Computer Science Technical Reports
No abstract provided.
A Model For Active Techniques For Compressed Video Transmission, Sheng-Yih Wang, Bharat Bhargava
A Model For Active Techniques For Compressed Video Transmission, Sheng-Yih Wang, Bharat Bhargava
Department of Computer Science Technical Reports
No abstract provided.
Towards The Evaluation Of Netcentric Scientific Applications, Shanhani Markus, Elias N. Houstis
Towards The Evaluation Of Netcentric Scientific Applications, Shanhani Markus, Elias N. Houstis
Department of Computer Science Technical Reports
No abstract provided.
An Adaptable Network Architecture For Multimedia Traffic Management And Control, Sheng-Yih Wang, Bharat Bhargava
An Adaptable Network Architecture For Multimedia Traffic Management And Control, Sheng-Yih Wang, Bharat Bhargava
Department of Computer Science Technical Reports
No abstract provided.
Experimental Evaluation Of Design Tradeoff In Specialized Virtual Machine For Multimedia Traffic In Active Networks, Sheng-Yih Wang, Bharat Bhargava
Experimental Evaluation Of Design Tradeoff In Specialized Virtual Machine For Multimedia Traffic In Active Networks, Sheng-Yih Wang, Bharat Bhargava
Department of Computer Science Technical Reports
No abstract provided.
Measuring Information Quality Of Web Site: Development Of Instrument, P. Katerattanakul, Keng Siau
Measuring Information Quality Of Web Site: Development Of Instrument, P. Katerattanakul, Keng Siau
Research Collection School Of Computing and Information Systems
Web sites have been extensively used to provide information to consumers. While practitioners and researchers have proposed different criteria for effective Web site design based on common sense, intuition, and rules-ofthumb, effective Web site design focusing on the quality of the information it provides has rarely been studied. In this research, we propose a framework and develop an instrument to measure the information quality of individual or personal Web sites. The theoretical foundation of this research is the information quality framework. The proposed framework and instrument were tested in an individual or personal Web site context.
Work In Progress: Automating Proportion/Period Scheduling, David Steere, Jonathan Walpole, Calton Pu
Work In Progress: Automating Proportion/Period Scheduling, David Steere, Jonathan Walpole, Calton Pu
Computer Science Faculty Publications and Presentations
The recent effort to define middleware capable of supporting real-time applications creates the opportunity to raise the level of abstraction presented to the programmer. We propose that proportion/period is a better abstraction for specifying resource needs and allocation than priorities. We are currently investigating techniques to address some issues that are restricting use of proportion/period scheduling to research real-time prototypes. In particular, we are investigating techniques to automate the task of selecting proportion and period, and that allow proportion/period to incorporate job importance under overload conditions.
The Window Distribution Of Multiple Tcps With Random Loss Queues, Archan Misra, Teunis Ott, John Baras
The Window Distribution Of Multiple Tcps With Random Loss Queues, Archan Misra, Teunis Ott, John Baras
Research Collection School Of Computing and Information Systems
Two approximate techniques for analyzing the window size distribution of TCP flows sharing a RED-like bottleneck queue are presented. Both methods presented first use a fixed point algorithm to obtain the mean window sizes of the flows, and the mean queue length in the bottleneck buffer. The simpler of the two methods then uses the ‘square root formula’ for TCP; the other method is more complicated. More often than not, the simpler method is slightly more accurate; this is probably due to the fact that window sizes of the different flows are negatively correlated.
Implementation Of Speech Recognition Software For Text Processing: An Exploratory Analysis, Sean P. Abell
Implementation Of Speech Recognition Software For Text Processing: An Exploratory Analysis, Sean P. Abell
Theses and Dissertations
The rationale behind implementing new information technologies is often to gain productivity improvements associated with the substitution of machinery for labor. However, the literature shows little direct evidence of a positive relationship between information technology investment and subsequent productivity benefits. This thesis reports on the examination into the productivity implications of implementing speech recognition software in a text processing environment. More specifically, research was conducted to compare text processing speeds and error rates using speech recognition software versus the keyboard and mouse. Of interest was the time required to input and proofread text processing tasks as well as the number …
Network Security Versus Network Connectivity: A Framework For Addressing The Issues Facing The Air Force Medical Community, Franklin E. Cunningham Jr.
Network Security Versus Network Connectivity: A Framework For Addressing The Issues Facing The Air Force Medical Community, Franklin E. Cunningham Jr.
Theses and Dissertations
The Air Force has instituted Barrier Reef to protect its networks. The Air Force medical community operates network connections that are incompatible with Barrier Reef. To overcome this problem, OASD(HA) directed the Tri-Service Management Program Office (TIMPO) to develop an architecture that protects all military health systems and allows them to link with all three services and outside partners. This research studied the underlying networking issues and formed a framework based on data from network experts from the Air Force's medical centers and their base network organizations. The findings were compared TIMPO and a composite framework was developed that more …
Power, Performance, And Perception (P3): Integrating Usability Metrics And Technology Acceptance Determinants To Validate A New Model For Predicting System Usage, Alan P. Fiorello
Power, Performance, And Perception (P3): Integrating Usability Metrics And Technology Acceptance Determinants To Validate A New Model For Predicting System Usage, Alan P. Fiorello
Theses and Dissertations
Currently, there are two distinct approaches to assist information technology managers in the successful implementation of office automation software. The first approach resides within the field of usability engineering, while the second approach is derived from the discipline of management information systems (MIS). However, neither approach has successfully produced conclusive evidence that explains what characteristics facilitate system use as well as influence user acceptance of the system. This study reports on the validity of a new model, entitled the Power, Performance, Perception (P3) model, that links the constructs of usability engineering to user acceptance. Additionally, speech recognition software (SRS) was …
Information System Incidents: The Development Of A Damage Assessment Model, Mark D. Horony
Information System Incidents: The Development Of A Damage Assessment Model, Mark D. Horony
Theses and Dissertations
Information system (IS) incidents are on the rise. With low manning and undertrained information security specialists it is difficult for organizations to stop IS incidents from occurring. Once an incident has occurred it is the IS manager's responsibility to ensure that a full and accurate damage assessment has been accomplished. However, most IS managers lack the necessary tools to assess the damage from an incident. This exploratory thesis developed an IS incident damage assessment model (DAM) that can be part of the IS manager's tool kit. During the development of the model, it became apparent that the model was supported …
Optimal Power Allocation In Cdma Forward Link Using Dependency Between Pilot And Traffic Channels, Seung Jong Park, Dongwoo Kim, Chang Yeon Kim
Optimal Power Allocation In Cdma Forward Link Using Dependency Between Pilot And Traffic Channels, Seung Jong Park, Dongwoo Kim, Chang Yeon Kim
Computer Science Faculty Research & Creative Works
This paper shows a new method for minimizing the transmit power on CDMA forward link channels. Different from previous works, the proposed method uses the dependency that exists between the respective signal qualities of the pilot channel and traffic channels. Since present CDMA forward link exploits coherent demodulation with continuously transmitting pilot signals, the stronger the pilot channel is, the less traffic power may be required while the same transmission quality is maintained. With laboratory tests, the dependency is graphed. And then an optimal pilot signal quality is found, which minimizes the total transmit power. Considering various mobile environments, -10 …
Implementing Sap R/3 At The University Of Nebraska, T. Sieber, Keng Siau, Fiona Fui-Hoon Nah, M. Sieber
Implementing Sap R/3 At The University Of Nebraska, T. Sieber, Keng Siau, Fiona Fui-Hoon Nah, M. Sieber
Research Collection School Of Computing and Information Systems
In April 1995, I asked four Nebraskans from the private sector and four senior people of the University to review the administrative processes of the University of Nebraska. In the appointment letter for this Task Force, I noted that many current administrative processes need to be examined to improve quality and productivity.
Immaccs: A Military Decision-Support System, Jens G. Pohl, Anthony A. Wood, Kym Jason Pohl, Arthur J. Chapman
Immaccs: A Military Decision-Support System, Jens G. Pohl, Anthony A. Wood, Kym Jason Pohl, Arthur J. Chapman
Collaborative Agent Design (CAD) Research Center
The Integrated Marine Multi-Agent Command and Control System (IMMACCS) is a multi-agent, distributed system, designed to provide a ‘common tactical picture’ with integrated and meaningful decision-support facilities to authorized operators at any access node. IMMACCS has been implemented as a three-tier architecture that distinguishes between information, logic and presentation. It utilizes an object-serving communication facility with subscription and multi-casting capabilities that is based on the Common Object Request Broker Architecture (CORBA). With an emphasis on application, IMMACCS was designed and implemented in concert with its military users as an integral component of experiments conceived by the Marine Corps Warfighting Laboratory …
Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 15, Number 9, November 1999, College Of Engineering And Computer Science, Wright State University
Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 15, Number 9, November 1999, College Of Engineering And Computer Science, Wright State University
BITs and PCs Newsletter
A fourteen page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.
An Access-Control Calculus For Spanning Administrative Domains, Jon Howell, David Kotz
An Access-Control Calculus For Spanning Administrative Domains, Jon Howell, David Kotz
Computer Science Technical Reports
In our quest to give users uniform access to resources unimpeded by administrative boundaries, we discovered that we needed transitive sharing among users, with the possibility of restricted access along each sharing link. To achieve that goal, we extend Lampson et al.'s calculus for access control to support restricted delegations. We discuss the advantages of our extension, including the simplification of constructs like ACLs and statement expiration. We also apply our extension to model the Simple Public Key Infrastructure and make suggestions about its future development. Our extended calculus exposes some surprising consequences in such systems that use restricted delegation.
Compression Of Biological Sequences By Greedy Off-Line Textual Subsitution, Alberto Apostolico, Stefano Lonardi
Compression Of Biological Sequences By Greedy Off-Line Textual Subsitution, Alberto Apostolico, Stefano Lonardi
Department of Computer Science Technical Reports
No abstract provided.
Data Organization Issues For Location-Dependent Queries In Mobile Computing, Sunjay Kumar Madria, Bharat Bhargava, Evaggelia Pitoura, Vijay Kumar
Data Organization Issues For Location-Dependent Queries In Mobile Computing, Sunjay Kumar Madria, Bharat Bhargava, Evaggelia Pitoura, Vijay Kumar
Department of Computer Science Technical Reports
No abstract provided.
Performance Evaluation Of Cpu Isolation Miechanisms In A Multithreaded Os Kernel, David K.Y. Yau
Performance Evaluation Of Cpu Isolation Miechanisms In A Multithreaded Os Kernel, David K.Y. Yau
Department of Computer Science Technical Reports
No abstract provided.
Leveraging Legacy Scientific Software With Mobile Agent Technology, Shanhani Markus, Elias N. Houstis
Leveraging Legacy Scientific Software With Mobile Agent Technology, Shanhani Markus, Elias N. Houstis
Department of Computer Science Technical Reports
No abstract provided.