Filters: Department: "Computing, School of" School Or College: "Scientific Computing and Imaging Institute" Collection: ir_uspace
1 - 25 of 20
| Creator | Title | Description | Subject | Date | ||
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Awasthi, Manu; Nellans, David W.; Sudan, Kshitij; Balasubramonian, Rajeev | ABP : predictor based management of DRAM row buffers | DRAM accesses are costly, especially in multicore systems. Future CMPs will run a mixed load of workloads/threads. Destructive interference at memory controller, spatio-temporal locality lost! DRAM row-buffer hits are least expensive, row-conflicts are most. Randomized memory access patterns re... | 2010-10-06 | |
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Zhao, Lu; Regehr, John | Comparing program logics for reasoning about safety properties | To prove memory write and controls transfers do not interfere with other programs in embedded systems. Hoare Logic with Bale Predicate; Hoare Logic with Separation Conjunction. | 2010-10-06 | |
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Fletcher, Preston Thomas; Moeller, John Henry; Phillips, Jeffrey; Venkatasubramanian, Suresh | Computing hulls in positive definite space | P(n): a Riemannian manifold Definition: symmetric positive-definite (n) (n) matrices Applications: Diffusion Tensor MRI (DT-MRI) Flow through voxel modeled in P(3) Elasticity Tensors Modeled by elements of P(6) Machine Learning Used in kernels Convex Hulls Data on P(n): Want to analyze... | 2010-10-06 | |
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Pascucci, Valerio | Efficient data restructuring and aggregation for I/O acceleration in PIDX | Hierarchical, multiresolution data representations enable interactive analysis and visualization of large-scale simulations. One promising application of these techniques is to store high performance computing simulation output in a hierarchical Z (HZ) ordering that translates data from a Cartesian ... | 2012-01-01 | |
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Kasera, Sneha K. | Enhancing covert communications with multiple colluding receivers | Traditional (single receiver) system setup: ? Choose exploit field (e.g. last byte of TCP Timestamp) ? Alice: probabilistically inject parts of coded message into field ? Bob: extract symbols from field, decode to correct errors ?Warden: assume full knowledge of system and keys Can we create un... | 2010-10-06 | |
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Gilbert, Nathan Alan; Riloff, Ellen M. | Exploring Knowledge-Rich Solutions to Noun Phrase Coreference Resolution | Coreference resolution is the task of identifying coreferent expressions in text. Accurate coreference resolution can improve other tasks such as machine translation, information retrievel and document summarization. Currently, the best approaches involve some form of supervised Machine Learni... | ||
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Yang, Xuejun; Chen, Yang; Eide, Eric; Regehr, John | Finding compiler bugs with random testing | Undefined behavior (such as divide by 0) or unspecified behavior (such as order of evaluation) gives compilers freedom to diverge, causing failure to our voting mechanism Control Flow Analysis • a control flow analyzer that can handle abnormal edges created by jump statements (goto / break ... | ||
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Bhatia, Harsh; Jadhav, Shreeraj Digambar; Norgard, Greg; Bremer, Peer-Timo; Pascucci, Valerio | Helmholtz-Hodge Decomposition of vector fields on 2-manifolds | A Morse-like Decomposition ? - Morse-Smale decomposition for gradient (of scalar) fields is an interesting way of decomposing the domain into regions of unidirectional flow (from a source to a sink ). - But works for gradient fields, which are conservative (irrotational), only. - Can such a de... | ||
| 9 |
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Widanagamaachchi, Wathsala Nayomi; Pascucci, Valerio | Image registration | Image Registration is the process of overlaying two or more images of the same scene, taken at different times, from different viewpoints and/or by different sensors. | ||
| 10 |
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Grosset, Andre Vincent Pascal; Pascucci, Valerio | Infinite Zoom | Any image (apart from a fractal) has a finite resolution. On zooming in, we eventually see pixels. The aim of this project is to allow users to infinitely zoom in on an image. | 2010-10-06 | |
| 11 |
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Joshi, Sarang; Venkatasubramanian, Suresh | Matching shapes using the current distance | Current Distance: It was introduced by Vaillant and Glaunès as a way of comparing shapes (point sets, curves, surfaces). This distance measure is defined by viewing a shape as a linear operator on a k-form field, and constructing a (dual) norm on the space of shapes. Shape Matching: Given two s... | ||
| 12 |
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Kasera, Sneha K.; Patwari, Neal | Mobility Assisted Secret Key Generation | Signature Based Key Generation. Wireless link signature; multiple paths caused by radio waves; their measurements are good signatures of links; link signatures measured almost symmetrically at two ends of wireless link, but cannot be measured from another location; use for secret key establishment;... | ||
| 13 |
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Pascucci, Valerio | Morse theory and its application | Discussion of Morse Theory | Morse; Morse-Smale; Topology; Algorithms; Terrain; Analysis | |
| 14 |
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Johnson, Christopher R. | Optimizing Inverse Electrocardiographic Problem: Hybrid and High-Order Finite Element Method | One type of inverse problems in electrocardiography (ECG) is to non-invasively reconstruct epicardial electric potentials from body-surface measurements. We study how to design the finite element discretization of such problem, so as to optimize the conditioning and stability of the resulting num... | ||
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Li, Guodong; Gopalakrishnan, Ganesh; Kirby, Robert Michael Ii | PUG : A Symbolic Verifier of GPU Programs | PUG is a automated verifier for GPU programs written in C/CUDA. PUG verifies GPU kernels for Data Races, Barrier mismatches, Totally wrong results, and Weak memory model related bugs. SMT-based correctness checking methods for these error are often more scalable, general and modular. | 2010-10-06 | |
| 16 |
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Kumar, Sidharth; Pascucci, Valerio | Remote visualization | Generalized Architecture and pipeline for a remote site | ||
| 17 |
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Pascucci, Valerio; Swank, William Lorenzo | Scalable scientific data | Question Hierarchial Z-Order Evaluation How can we present hundreds or thousands of gigabytes of scientific data to a user for analysis and interpretation? • The Scientific Computing and Imaging Institute is responsible for helping scientists visualize massive amounts of data. • Sources ... | 2010-02-26 | |
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Musuvathy, Suraj Ravi; Cohen, Elaine | Tracing ridges on B-Spline surfaces | Won Best Paper Award at SIAM/ACM Joint Conference on Geometric and Physical Modeling, San Francisco, 2009 | 2010-02-26 | |
| 19 |
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Potter, Kristin Carrie | Uncertainty visualization in forward and inverse cardiac models | Quantification and visualization of uncertainty in cardiac forward and inverse problems with complex geometries is subject to various challenges. Specific to visualization is the observation that occlusion and clutter obscure important regions of interest, making visual assessment difficult. In orde... | 2013-01-01 | |
| 20 |
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Tripathi, Abhishek; Bremer, Peer-Timo; Pascucci, Valerio | Understanding global climate change | What is Climate Modeling? Use of quantitative methods to simulate the interactions of the atmosphere, oceans, land surface, and ice. Average Global Temperatures indicate a warming trend but that alone does not explain why it is happening. |
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