UScholar Works
 
Filters: Date: "1999" Department: "Computing, School of" Collection: "ir_uspace"
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CreatorTitleDescriptionSubjectDate
1 Sloan, Peter-PikeA painterly approach to human skinRendering convincing human figures is one of the unsolved goals of computer graphics. Previous work has concentrated on modeling physics of human skin. We have taken a different approach. We are exploring techniques used by artists, specifically artists who paint air-brushed portraits. Our goal is t...Human skin1999
2 Riloff, Ellen M.Bootstrapping for text learning tasksWhen applying text learning algorithms to complex tasks, it is tedious and expensive to hand-label the large amounts of training data necessary for good performance. This paper presents bootstrapping as an alternative approach to learning from large sets of labeled data. Instead of a large quantity ...Bootstrapping; Text learning algorithms; Seed information1999
3 Riloff, Ellen M.Corpus-based identification of non-anaphoric noun phrasesCoreference resolution involves finding antecedents for anaphoric discourse entities, such as definite noun phrases. But many definite noun phrases are not anaphoric because their meaning can be understood from general world knowledge (e.g., "the White House" or "the news media"). We have develope...Corpus-based identification; Non-anaphoric noun phrases; Coreference resolution; MUC-4; Discourse entity; DE1999
4 Jacobson, HansDesign and validation of a simultaneous multi-threaded DLX processorModern day computer systems rely on two forms of parallelism to achieve high performance, parallelism between individual instructions of a program (ILP) and parallelism between individual threads (TLP). Superscalar processors exploit ILP by issuing several instructions per clock, and multiprocessors...DLX processor; Validation1999
5 Carter, John B.Design of a parallel vector access unit for SDRAM memory systemsParallel Vector Access is a technique that exploits the regularity of vector or stream accesses to perform them efficiently in parallel on a multi-bank memory system. The performance of applications that have vector accesses may be improved using a memory controller that performs scatter/gather oper...Parallel vector access; SDRAM memory; Multi-bank memory system1999
6 Freier, Rodney; Thompson, William B.Design-space exploration of most-recent-only communication using myrinet on SGI ccNUMA architecturesSGI's current ccNUMA multiprocessor architectures offer high scalability and performance without sacrificing the ease of use of simpler SMP systems. Although these systems also provide a standard PCI expansion bus, the bridging between PCI and SGI's ccNUMA architecture invalidates the assumptions ty...Most-recent-only communication; Myrinet; SGI; Communications latencies1999
7 Kuramkote, Ravindra; Carter, JohnExploring the value of supporting multiple DSM protocols in Hardware DSM ControllersThe performance of a hardware distributed shared memory (DSM) system is largely dependent on its architect's ability to reduce the number of remote memory misses that occur. Previous attempts to solve this problem have included measures such as supporting both the CC-NUMA and S-COMA architectures is...DSM; Controllers1999
8 Gopalakrishnan, GaneshFormalization and analysis of a solution to the PCI 2.1 bus transaction ordering problem: PVS filesThe following PVS files are being put on our technical reports server and are available through anonymous FTP. Look for file "pci_pvs_files.tag.gz" in the TR directory.Bus transaction; Ordering problem1999
9 Zhang, ChengqiangHardware-only stream prediction + cache prefetching + dynamic access orderingThe speed gap between processors and memory system is becoming the performance bottleneck for many applications, and computations with strided access patterns are among those that suffer most. The vectors used in such applications lack temporal and often spatial locality, and are usually too large t...Speed gap; Stream prediction; Cache prefetching; Dynamic access ordering1999
10 Breaderson, Dean J.The I3Stick: an inexpensive, immersive, interaction deviceVirtual environments require interaction devices that are intuitive and ergonomic, yet capable of many input parameters. Many devices satisfying these requirements can be expensive, difficult to manipulate, and often require the integration of large software libraries with existing applications. We ...Virtual environments; I3Stick; Interaction devices1999
11 Brunvand, Erik L.; Carter, JohnImpulse: building a smarter memory controllerImpulse is a new memory system architecture that adds two important features to a traditional memory controller. First, Impulse supports application-specific optimizations through configurable physical address remapping. By remapping physical addresses, applications control how their data is ac...1999
12 Riloff, Ellen M.Information extraction as a stepping stone toward story understandingHistorically story understanding systems have depended on a great deal of handcrafted knowledge. Natural language understanding systems that use conceptual knowledge structures (Schank and Abelson 1977; Cullingford 1978; Wilensky 1978; Carbonell 1979; Lehnert 1981; Kolodner 1983) typically rely on ...Information extraction; Story understanding1999
13 Parker, Steven G.; Hansen, Charles D.; Shirley, Peter S.Interactive ray tracing for volume visualizationWe present a brute-force ray tracing system for interactive volume visualization, The system runs on a conventional (distributed) shared-memory multiprocessor machine. For each pixel we trace a ray through a volume to compute the color for that pixel. Although this method has high intrinsic computa...Ray tracing; Volume visualization; Isosurfaces; Maximum-intensity projection; Traversal optimizations1999
14 Johnson, Christopher R.; Parker, Steven G.; Hansen, Charles D.Interactive simulation and visualizationMost of us perform data analysis and visualization only after everything else is finished, which often means that we don't discover errors invalidating the results of our simulation until postprocessing. A better approach would be to improve the integration of simulation and visualization into the...Computational steering; Interactive simulation; Isosurfaces1999
15 Zhang, LixinISIM: The simulator for the impulse adaptable memory systemThis document describes ISIM, the simulator for the Impulse Adaptable Memory System. Impulse adds two new features to a conventional memory system. First, it supports a configurable, extra level of address remapping at the memory controller. Second, it supports prefetching at the memory controller. ...ISIM; Impulse Adaptable Memory System; Memory systems1999
16 Hansen, Charles D.Isosurface extraction in time-varying fields using a temporal branch-on-need tree (T-BON)The Temporal Branch-on-Need Tree (T-BON) extends the threedimensional branch-on-need octree for time-varying isosurface extraction. At each time step, only those portions of the tree and data necessary to construct the current isosurface are read from disk. This algorithm can thus exploit the tempor...Isosurfaces; Time-dependent scalar field visualization; Octree; Multiresolution methods1999
17 Weinstein, DavidLead field basis for FEM source localizationIn recent years, significant progress has been made in the area of EEG/MEG source imaging. source imaging on simple spherical models has become increasingly efficient, with consistently reported accuracy of within 5mm. In contrast, source localization on realistic head models remains slow, with sub-...FEM source localization; Source imaging; EEG; MEG1999
18 Riloff, Ellen M.Learning dictionaries for information extraction by multi-level bootstrappingInformation extraction systems usually require two dictionaries: a semantic lexicon and a dictionary of extraction patterns for the domain. We present a multilevel bootstrapping algorithm that generates both the semantic lexicon and extraction patterns simultaneously. As input, our technique requir...Information extraction; Extraction patterns; Multi-level bootstrapping; Learning dictionaries1999
19 Zhang, Lixin; Carter, JohnMemory system support for image processingProcessor speeds are increasing rapidly, but memory speeds are not keeping pace. Image processing is an important application domain that is particularly impacted by this growing performance gap. Image processing algorithms tend to have poor memory locality because they access their data in a non-se...Processor speeds; Memory system support; Memory speeds1999
20 Hansen, Charles D.; Sloan, Peter-Pike J.Parallel lumigraph reconstructionThis paper presents three techniques for reconstructing Lumigraphs/ Lightfields on commercial ccNUMA parallel distributed shared memory computers. The first method is a parallel extension of the software-based method proposed in the Lightfield paper. This expands the ray/two-plane intersection test ...Lumigraph; Parallel reconstruction1999
21 Hansen, Charles D.Parallel lumigraph reconstructionThis paper presents three techniques for reconstructing Lumigraphs/Lightfields on commercial ccNUMA parallel distributed shared memory computers. The first method is a parallel extension of the software-based method proposed in the Lightfield paper. This expands the ray/two-plane intersection test a...Lumigraph; Lightfield; Illumination; Parallel reconstruction; Ray tracing1999
22 Parker, Steven G.; Hansen, Charles D.; Shirley, Peter S.Parallel methods for isosurface visualizationisosurface extraction and vis utilization is crucial for explorative scientific visualization of extremely large scientific data. The shear number of polygons extracted and the subsequent rendering time limit interactivity. We explore two solutions to this problem: exploiting parallel graphics hardw...Isosurfaces; Ray tracing; Large data1999
23 Brunvand, Erik L.Peephole optimization of asynchronous macromodule networksAbstract- Most high-level synthesis tools for asynchronous circuits take descriptions in concurrent hardware description languages and generate networks of macromodules or handshake components. In this paper, we propose a peephole optimizer for these networks. Our peephole optimizer first deduces an...1999
24 Freire, JulianaPersonalizing the web using site descriptionsThe information overload on the Web has created a great need for efficient filtering mechanisms. Many sites (e.g., CNN and Quicken) address this problem by allowing a user to create personalized pages that contain only information that is of interest to the user. We propose a new approach for p...XPointer; Data extraction; Site descriptions; Personalized web pages1999
25 Brunvand, Erik L.Practical advances in asynchronous design and in asynchronous/synchronous interfacesAsynchronous systems are being viewed as an increasingly viable alternative to purely synchronous systems. This paper gives an overview of the current state of the art in practical asynchronous circuit and system design in four areas: controllers, datapaths, processors, and the design of asynchr...1999
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