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Articles 1 - 30 of 233
Full-Text Articles in Computer Sciences
Hey, You Got Your Language In My Operating System!, Jon Howell, Mark Montague
Hey, You Got Your Language In My Operating System!, Jon Howell, Mark Montague
Computer Science Technical Reports
Several projects in the operating systems research community suggest a trend of convergence among features once divided between operating systems and languages. We describe how partial evaluation and transformational programming systems apply to this trend by providing a general framework for application support, from compilation to run-time services. We contend that the community will no longer think of implementing a static collection of services and calling it an operating system; instead, this general framework will allow applications to be flexibly configured, and the ``operating system'' will simply be the application support that is supplied at run-time.
Snowflake: Spanning Administrative Domains, Jon Howell, David Kotz
Snowflake: Spanning Administrative Domains, Jon Howell, David Kotz
Computer Science Technical Reports
Many distributed systems provide a ``single-system image'' to their users, so the user has the illusion that they are using a single system when in fact they are using many distributed resources. It is a powerful abstraction that helps users to manage the complexity of using distributed resources. The goal of the Snowflake project is to discover how single-system images can be made to span administrative domains. Our current prototype organizes resources in namespaces and distributes them using Java Remote Method Invocation. Challenging issues include how much flexibility should be built into the namespace interface, and how transparent the network …
Closed-Loop Object Recognition Using Reinforcement Learning, Jing Peng, Bir Bhanu
Closed-Loop Object Recognition Using Reinforcement Learning, Jing Peng, Bir Bhanu
Department of Computer Science Faculty Scholarship and Creative Works
Current computer vision systems whose basic methodology is open-loop or fi'/tertype typically use image segmentation followed by object recognition algorithms. These systems are not robust for most real-world applications. In contrast the system presented here achieves robust performance by using reinforcement learning to induce a mapping from input images to corresponding segmentation parameters. This is accomplished by using the confidence level of model matching as a reinforcement signal for a team of learning automata to search for segmentation parameters during training. The use of the recognition algorithm as part of the evaluation function for image segmentation gives rise to significant …
Tuple Source Relational Model: A Source-Aware Data Model For Multidatabases, Ee Peng Lim, Roger Hsiang-Li Chiang, Yinyan Cao
Tuple Source Relational Model: A Source-Aware Data Model For Multidatabases, Ee Peng Lim, Roger Hsiang-Li Chiang, Yinyan Cao
Research Collection School Of Computing and Information Systems
In some integration projects, complete integration of database instances may not be necessary. It may also be too costly and impossible to do so due to poor local data quality and insufficient instance-level knowledge. In this research, we study how multidatabases with global schemas should be represented and manipulated when the data instances from the local databases do not require to be fully integrated. We propose the tuple source (TS) relational model to represent multidatabases under such an integration requirement. This model extends the classical relational model by augmenting every relation with a source attribute to identify the local database …
Optimizing Amplifier Placements In A Multiwavelength Optical Lan/Man: The Unequally Powered Wavelengths Case, Byrav Ramamurthy, Jason Iness, Biswanath Mukherjee
Optimizing Amplifier Placements In A Multiwavelength Optical Lan/Man: The Unequally Powered Wavelengths Case, Byrav Ramamurthy, Jason Iness, Biswanath Mukherjee
School of Computing: Faculty Publications
Optical networks based on passive-star couplers and employing WDM have been proposed for deployment in local and metropolitan areas. These networks suffer from splitting, coupling, and attenuation losses. Since there is an upper bound on transmitter power and a lower bound on receiver sensitivity, optical amplifiers are usually required to compensate for the power losses mentioned above. Due to the high cost of amplifiers, it is desirable to minimize their total number in the network. However, an optical amplifier has constraints on the maximum gain and the maximum output power it can supply; thus, optical amplifier placement becomes a challenging …
Fan-Type Conditions For Collapsible Graphs, Zhi-Hong Chen
Fan-Type Conditions For Collapsible Graphs, Zhi-Hong Chen
Scholarship and Professional Work - LAS
No abstract provided.
A Work Minimization Approach To Image Morphing, Peisheng Gao, Thomas W. Sederberg
A Work Minimization Approach To Image Morphing, Peisheng Gao, Thomas W. Sederberg
Faculty Publications
An algorithm is presented for morphing two images, often with little or no user interaction. For two similar images (such as different faces against a neutral background) the algorithm generally can create a pleasing morph completely automatically. The algorithm seeks the minimum work to deform one image into the other, where work is a function of the amount of warping and recoloration. A hierarchical method for finding a minimal work solution is invoked. Anchor point constraints are satisfied by imposing penalties on deformations that disobey these constraints. Good results can be obtained in less than ten seconds for 256 x …
Measurement Of Triple Gauge Wwγ Couplings At Lep2 Using Photonic Events, R. Barate, Manoj Thulasidas
Measurement Of Triple Gauge Wwγ Couplings At Lep2 Using Photonic Events, R. Barate, Manoj Thulasidas
Research Collection School Of Computing and Information Systems
A study of events with photons and missing energy has been performed with the data sample obtained with the ALEPH detector at centre-of-mass energies from 161 to 184 GeV, corresponding to a total integrated luminosity of about 80 pb−1. The measured distributions are in agreement with Standard Model predictions, leading to constraints on WWγ gauge coupling parameters Δκγ and λγ. The results from the fit to the cross sections and to the energy and angular distributions of the photons are: Δκγ=0.05+1.15−1.10(stat)±0.25(syst), λγ=−0.05+1.55−1.45(stat)±0.30(syst).
A Realtime Internet Based Quality Control Application For Hurricane Surface Wind Observations, Luis R. Amat Jr.
A Realtime Internet Based Quality Control Application For Hurricane Surface Wind Observations, Luis R. Amat Jr.
FIU Electronic Theses and Dissertations
This thesis chronicles the design and implementation of a Intemet/Intranet and database based application for the quality control of hurricane surface wind observations. A quality control session consists of selecting desired observation types to be viewed and determining a storm track based time window for viewing the data. All observations of the selected types are then plotted in a storm relative view for the chosen time window and geography is positioned for the storm-center time about which an objective analysis can be performed. Users then make decisions about data validity through visual nearestneighbor comparison and inspection. The project employed an …
Parallel Algorithms For 3d Reconstruction Of Asymmetric Objects From Electron Micrographs, Robert E. Lynch, Dan C. Marinescu, Hong Lin, Timothy S. Baker
Parallel Algorithms For 3d Reconstruction Of Asymmetric Objects From Electron Micrographs, Robert E. Lynch, Dan C. Marinescu, Hong Lin, Timothy S. Baker
Department of Computer Science Technical Reports
No abstract provided.
Decoupled Delay And Rate Guarantees For Cross Domain Thread Scheduling, David K.Y. Yau
Decoupled Delay And Rate Guarantees For Cross Domain Thread Scheduling, David K.Y. Yau
Department of Computer Science Technical Reports
No abstract provided.
Sciagents Tool: User's Guide, John R. Rice, P. Tsompanopoulou, E. Vavalis
Sciagents Tool: User's Guide, John R. Rice, P. Tsompanopoulou, E. Vavalis
Department of Computer Science Technical Reports
No abstract provided.
Partial Redundancy Elimination For Access Path Expressions, Antony L. Hosking, National Nystrom, David Whitlock, Quintin Cutts, Amer Diwan
Partial Redundancy Elimination For Access Path Expressions, Antony L. Hosking, National Nystrom, David Whitlock, Quintin Cutts, Amer Diwan
Department of Computer Science Technical Reports
No abstract provided.
A Knowledge Discovery Methodology For The Performance Evaluation Of Scientific Software, Vassilios S. Verykios, Elias N. Houstis, John R. Rice
A Knowledge Discovery Methodology For The Performance Evaluation Of Scientific Software, Vassilios S. Verykios, Elias N. Houstis, John R. Rice
Department of Computer Science Technical Reports
No abstract provided.
An Aspect-Oriented Approach To Distributed Object Security, Riubing Hao, Ladislau Bölöni, Kyungkoo Jun, Dan C. Marinescu
An Aspect-Oriented Approach To Distributed Object Security, Riubing Hao, Ladislau Bölöni, Kyungkoo Jun, Dan C. Marinescu
Department of Computer Science Technical Reports
No abstract provided.
Molding Best-Effort Bandwith Into Graded Services: The Sbs Approach, Kihong Park, Shaogang Chen
Molding Best-Effort Bandwith Into Graded Services: The Sbs Approach, Kihong Park, Shaogang Chen
Department of Computer Science Technical Reports
No abstract provided.
Information Coupling In Web Databases, Sourav S. Bhowmick, Wee-Keong Ng, Ee Peng Lim
Information Coupling In Web Databases, Sourav S. Bhowmick, Wee-Keong Ng, Ee Peng Lim
Research Collection School Of Computing and Information Systems
Web information coupling refers to an association of topically related web documents. This coupling is initiated explicitly by a user in a web warehouse specially designed for web information. Web information coupling provides the means to derive additional, useful information from the WWW. In this paper, we discuss and show how two web operators, i.e., global web coupling and local web coupling, are used to associate related web information from the WWW and also from multiple web tables in a web warehouse. This paper discusses various issues in web coupling such as coupling semantics, coupling-compability, and coupling evaluation.
Web Bags: Are They Useful In A Web Warehouse?, Sourav S. Bhowmick, Sanjay Kumar Madria, Wee-Keong Ng, Ee Peng Lim
Web Bags: Are They Useful In A Web Warehouse?, Sourav S. Bhowmick, Sanjay Kumar Madria, Wee-Keong Ng, Ee Peng Lim
Research Collection School Of Computing and Information Systems
Sets and bags are closely related structures. A bag is different from a set in that it is sensitive to the number of times an element occurs while a set is not. In this paper, we introduce the concept of web bag in a web warehouse as a part of our Web Information Coupling System(WICS). Informally, a web bag is a web table which allows multiple occurrences of identical web tuples. Web bag helps to discover useful knowledge from a web table such as visible documents (or web sites), luminous documents and luminous paths. We formally discuss the semantics and …
Searches For The Neutral Higgs Bosons Of The Mssm In E+E- Collisions At Centre-Of-Mass Energies Of 181-184 Gev, Barate, R.; Et Al., M. Thulasidas
Searches For The Neutral Higgs Bosons Of The Mssm In E+E- Collisions At Centre-Of-Mass Energies Of 181-184 Gev, Barate, R.; Et Al., M. Thulasidas
Research Collection School Of Computing and Information Systems
The data collected by ALEPH at LEP at centre-of-mass energies ranging from 181 to 184 GeV, corresponding to an integrated luminosity of 57 pb−1, are analysed to search for pair-produced neutral Higgs bosons h and A, in the bb̄bb̄ and τ+τ−bb̄ final states. Two events are found in the data with 2.5 expected from standard model processes. When combined with the lower energy data collected by ALEPH and with earlier reported searches for associated hZ production, these analyses are interpreted in the context of the minimal supersymmetric extension of the standard model (MSSM). For standard choices of MSSM parameter sets, …
A Theory Of Satisficing Decisions And Control, Richard L. Frost, Michael A. Goodrich, Wynn C. Stirling
A Theory Of Satisficing Decisions And Control, Richard L. Frost, Michael A. Goodrich, Wynn C. Stirling
Faculty Publications
The existence of an optimal control policy and the techniques for finding it are grounded fundamentally in a global perspective. These techniques can be of limited value when the global behavior of the system is difficult to characterize, as it may be when the system is nonlinear, when the input is constrained, or when only partial information is available regarding system dynamics or the environment. Satisficing control theory is an alternative approach that is compatible with the limited rationality associated with such systems. This theory is extended by the introduction of the notion of strong satisficing to provide a systematic …
Notepals: Sharing And Synchronizing Handwritten Notes With Multimedia Documents, James A. Landay, Richard C. Davis, Victor Chen, Jonathan Huang, Rebecca B. Lee, Francis Li, James Lin, Charles B. Morrey, Ben Schleimer
Notepals: Sharing And Synchronizing Handwritten Notes With Multimedia Documents, James A. Landay, Richard C. Davis, Victor Chen, Jonathan Huang, Rebecca B. Lee, Francis Li, James Lin, Charles B. Morrey, Ben Schleimer
Research Collection School Of Computing and Information Systems
NotePals is an ink-based, collaborative note taking application that runs on personal digital assistants (PDAs). Meeting participants write notes in their own handwriting on a PDA. These notes are shared with other participants by synchronizing later with a shared note repository that can be viewed using a desktop-based web browser. NotePals is distinguished by its lightweight process, interface, and hardware. This demonstration illustrates the design of two different NotePals clients and our web-based note browser.
A Global Object Model For Accommodating Instance Heterogeneities, Ee Peng Lim, Roger Hsiang-Li Chiang
A Global Object Model For Accommodating Instance Heterogeneities, Ee Peng Lim, Roger Hsiang-Li Chiang
Research Collection School Of Computing and Information Systems
To completely address database integration problems in the context of multidatabase [10] and data warehousing systems, one has to examine various integration and query requirements. Due to various reasons such as poor data quality in local databases, ongoing local database updates, and instance heterogeneities, some instance differences have to be accommodated by the integrated databases. We have therefore proposed a new object-oriented global data model, called OORA, that can accommodate attribute and relationship instance heterogeneities in the integrated database. In addition, the OORA model has been designed to allow database integrators and end users to query both the local and …
Web Warehousing System: Design And Issues, Wee-Keong Ng, Ee Peng Lim, Sourav S. Bhowmick, Sanjay Kumar Madria
Web Warehousing System: Design And Issues, Wee-Keong Ng, Ee Peng Lim, Sourav S. Bhowmick, Sanjay Kumar Madria
Research Collection School Of Computing and Information Systems
The World Wide Web is a distributed global information resource. It contains a large amount of information that have been placed on the web independently by different organizations and thus, related information may appear across different web sites. To manage and access heterogeneous information on WWW, we have started a project of building a web warehouse, called Whoweda (Warehouse of Web Data). Currently, our work on building a web warehousing system has focused on building a data model and designing a web algebra. In this paper, we discuss design and research issues in a web warehousing system. The issues include …
A Framework For Sharing Handwritten Notes, Richard C. Davis, James Lin, Jason A. Brotherton, James A. Landay, Morgan N. Price, Bill N. Schilit
A Framework For Sharing Handwritten Notes, Richard C. Davis, James Lin, Jason A. Brotherton, James A. Landay, Morgan N. Price, Bill N. Schilit
Research Collection School Of Computing and Information Systems
NotePals is an ink-based, collaborative note taking application that runs on personal digital assistants (PDAs). Meeting participants write notes in their own handwriting on a PDA. These notes are shared with other participants by synchronizing later with a shared note repository that can be viewed using a desktop-based web browser. NotePals is distinguished by its lightweight process, interface, and hardware. This demonstration illustrates the design of two different NotePals clients and our web-based note browser.
Structural Biology Metaphors Applied To The Design Of A Distributed Object System, Ladislau Bölöni, Ruibing Hao, Kyungkoo Jun, Dan C. Marinescu
Structural Biology Metaphors Applied To The Design Of A Distributed Object System, Ladislau Bölöni, Ruibing Hao, Kyungkoo Jun, Dan C. Marinescu
Department of Computer Science Technical Reports
No abstract provided.
Contract Manager Anywhere And Internet-Enabled Database Application, Yao-Jen Chang
Contract Manager Anywhere And Internet-Enabled Database Application, Yao-Jen Chang
FIU Electronic Theses and Dissertations
This thesis describes the design and implementation of an Internet-enabled database application which uses ASP (Active Server Pages) and other related knowledge such as ADO (ActiveX Data Object), ODBC (Open DataBase Connectivity) and OLE-DB (Object Linking and Embed-DataBase). Because it is an Internet-enabled application, the subject of "Security" was also studied by implementing ASP technology. The database was created using Microsoft Access 97 and the web interface was built using HTML, VBScript and JavaScript. This system will be fully functioning at the Florida Department of Education (FLDOE) site and will enable remote access to allow users to monitor hundreds of …
Utility Driven Mobile-Agent Scheduling, Jonathan Bredin, David Kotz, Daniela Rus
Utility Driven Mobile-Agent Scheduling, Jonathan Bredin, David Kotz, Daniela Rus
Computer Science Technical Reports
Mobile agents are programs capable of migrating from one host machine to another. We propose that mobile agents purchase resource access rights from host machines thereby establishing a market for computational resources and giving agents a metric to evenly distribute themselves throughout the network. Market participation requires quantitative information about resource consumption to define demand and calculate utility. We create a formal utility model to derive user-demand functions, allowing agents to efficiently plan expenditure and deal with price fluctuations. By quantifying demand and utility, resource owners can precisely set a value for a good. We simulate our model in a …
Abstractions For Simplifying Planning In Self-Reconfigurable Robotic Systems, Craig Mcgray, Daniela Rus
Abstractions For Simplifying Planning In Self-Reconfigurable Robotic Systems, Craig Mcgray, Daniela Rus
Computer Science Technical Reports
In [KVRM], we described a three-dimensional self-reconfiguring robot module called the Molecule Robot. In this paper, we provide a system of abstractions for modules in self-reconfigurable robotic systems, and show how this system can be used to simplify the motion planning of the Molecule Robot system.
Towards Performance-Driven System Support For Distributed Computing In Clustered Environments, John Cruz, Kihong Park
Towards Performance-Driven System Support For Distributed Computing In Clustered Environments, John Cruz, Kihong Park
Department of Computer Science Technical Reports
No abstract provided.
Parallel Algorithms For Maximum Matching In Complements Of Interval Graphs And Related Problems, Marilyn G. Andrews, Mikhail J. Atallah, Danny Z. Chen, D. T. Leo
Parallel Algorithms For Maximum Matching In Complements Of Interval Graphs And Related Problems, Marilyn G. Andrews, Mikhail J. Atallah, Danny Z. Chen, D. T. Leo
Department of Computer Science Technical Reports
No abstract provided.