UScholar Works
 
Filters: Department: "Computing, School of" Collection: "ir_uspace" Date: "2003"
1 - 25 of 17
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CreatorTitleDescriptionSubjectDate
1 Parker, Steven G.; Hansen, Charles D.Distributed interactive ray tracing for large volume visualizationWe have constructed a distributed parallel ray tracing system that interactively produces isosurface renderings from large data sets on a cluster of commodity PCs. The program was derived from the SCI Institute's interactive ray tracer (*-Ray), which utilizes small to large shared memory platforms, ...Ray tracing; Volume rendering; Large data; Cluster computing; Distributed shared memory2003
2 Hansen, Charles D.; Whitaker, Ross T.Interactive deformation and visualization of level set surfaces using graphics hardwareDeformable isosurfaces, implemented with level-set methods, have demonstrated a great potential in visualization for applications such as segmentation, surface processing, and surface reconstruction. Their usefulness has been limited, however, by their high computational cost and and reliance on sig...Deformation; Level sets; Deformable models; Image segmentation; Volume visualization; GPU; Streaming computation; Isosurfaces2003
3 Riloff, Ellen M.Learning extraction patterns for subjective expressionsThis paper presents a bootstrapping process that learns linguistically rich extraction patterns for subjective (opinionated) expressions. High-precision classifiers label unannotated data to automatically create a large training set, which is then given to an extraction pattern learning algorithm. T...Bootstrapping process; Extraction patterns; Subjective expressions; Opinions2003
4 Hansen, Charles D.; Johnson, Christopher R.Constraint-based technique for haptic volume explorationWe present a haptic rendering technique that uses directional constraints to facilitate enhanced exploration modes for volumetric datasets. The algorithm restricts user motion in certain directions by incrementally moving a proxy point along the axes of a local reference frame. Reaction forces are g...Haptic rendering; Immersive visualization; Human-computer interaction2003
5 Riloff, Ellen M.Recognizing and organizing opinions expressed in the world pressTomorrow's question answering systems will need to have the ability to process information about beliefs, opinions, and evaluations-the perspective of an agent. Answers to many simple factual questions-even yes/no questions-are affected by the perspective of the information source. For example...Opinions; Opinion recognition; World press; MPQA project; Multiple perspectives2003
6 Balasubramonian, RajeevDynamically managing the communication-parallelism trade-off in future clustered processorsClustered microarchitectures are an attractive alternative to large monolithic superscalar designs due to their potential for higher clock rates in the face of increasingly wire-delay-constrained process technologies. As increasing transistor counts allow an increase in the number of clusters, th...Clustered architectures; Microarchitecture; Decentralized cache; Interconnects2003
7 Hansen, Charles D.Visually accurate multi-field weather visualizationWeather visualization is a difficult problem because it comprises volumetric multi-field data and traditional surface-based approaches obscure details of the complex three-dimensional structure of cloud dynamics. Therefore, visually accurate volumetric multi-field visualization of storm scale and cl...Weather visualization; Multifield visualization; Volume rendering2003
8 Freire, JulianaBridging the XML-relational divide with LegoDB: a demonstrationWe present LegoDB, a cost-based XML storage mapping engine that automatically explores a space of possible XML-to-relational mappings and selects an efficient mapping for a given application.LegoDB; Storage mappings2003
9 Yang, Yue; Gopalakrishnan, Ganesh; Lindstrom, Gary E.A generic operational memory model specification framework for multithreaded program verificationGiven the complicated nature of modern architectural and language level memory model designs, it is vital to have a systematic ap- proach for specifying memory consistency requirements that can support verification and promote understanding. In this paper, we develop a spec- ification methodolog...Multithreaded program verification2003
10 Yang, Yue; Gopalakrishnan, Ganesh; Lindstrom, Gary E.; Slind, Konrad LeeAnalyzing the Intel Itanium memory ordering rules using logic programming and SATWe present a non-operational approach to specifying and analyzing shared memory consistency models. The method uses higher order logic to capture a complete set of ordering constraints on execution traces, in an axiomatic style. A direct translation of the semantics to a constraint logic program...Intel Itanium memory; Ordering rules; Sared memory; Consistency models2003
11 Lindstrom, Gary E.Fast and accurate NN approach for multi-event annotation of time seriesSimilarity search in time-series subsequences is an important time series data mining task. Searching in time series subsequences for matches for a set of shapes is an extension of this task and is equally important. In this work we propose a simple but efficient approach for finding matches for a g...Time-series subsequences; Nearest neighbor approach; Multi-event2003
12 Hansen, Charles D.Gaussian transfer functions for multi-field volume visualizationVolume rendering is a flexible technique for visualizing dense 3D volumetric datasets. A central element of volume rendering is the conversion between data values and observable quantities such as color and opacity. This process is usually realized through the use of transfer functions that are prec...Volume rendering; Transfer functions; Volume visualization2003
13 Parker, Steven G.Survey of the Itanium architecture from a programmer's perspectiveThe Itanium family of processors represents Intel;s foray into the world of Explicitly Parallel Instruction Computing and 64-bit system design. This survey contains an introduction to the Itanium architecture and instruction set, as well as some of the available implementations. Taking a programmer'...Itanium; Instruction sets2003
14 Brunvand, Erik L.Self-timed design with dynamic domino circuitsWe introduce a simple hierarchical design technique for building high-performance self-timed components using dynamic domino-style circuits. This technique is useful for building handshaking style functional blocks and for self-timed data path components. We wrap the dynamic domino circuit in a wra...2003
15 Yang, Yue; Gopalakrishnan, Ganesh; Lindstrom, Gary E.; Slind, Konrad LeeNemos: a framework for axiomatic and executable specifications of memory consistency modelsConforming to the underlying memory consistency rules is a fundamental require- ment for implementing shared memory systems and writing multiprocessor programs. In order to promote understanding and enable automated verification, it is highly desir- able that a memory model specification be both ...Nemos; Shared memory systems2003
16 Yang, Yue; Gopalakrishnan, Ganesh; Lindstrom, Gary E.Rigorous concurrency analysis of multithreaded programsThis paper explores the practicality of conducting program analysis for multithreaded software using constraint solv- ing. By precisely defining the underlying memory consis- tency rules in addition to the intra-thread program seman- tics, our approach orders a unique advantage for program ver- ...Concurrency analysis; Multithreaded programs2003
17 Riloff, Ellen M.Learning subjective nouns using extraction pattern bootstrappingWe explore the idea of creating a subjectivity classifier that uses lists of subjective nouns learned by bootstrapping algorithms. The goal of our research is to develop a system that can distinguish subjective sentences from objective sentences. First, we use two bootstrapping algorithms that explo...Subjective nouns; Bootstrapping; Extraction patterns; Subjectivity classifier; Naive Bayes classifier2003
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