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Creator | Title | Description | Subject | Date |
| 151 |
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Regehr, John | Understanding integer overflow in C/C++ | Integer overflow bugs in C and C++ programs are difficult to track down and may lead to fatal errors or exploitable vulnerabilities. Although a number of tools for finding these bugs exist, the situation is complicated because not all overflows are bugs. Better tools need to be constructed-but a tho... | | 2012-01-01 |
| 152 |
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Regehr, John | Efficient memory safety for TinyOS | Reliable sensor network software is difficult to create: applications are concurrent and distributed, hardware-based memory protection is unavailable, and severe resource constraints necessitate the use of unsafe, low-level languages. Our work improves this situation by providing efficient memory an... | | 2007-01-01 |
| 153 |
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Regehr, John | HLS: a framework for composing soft real-time schedulers | Hierarchical CPU scheduling has emerged as a way to (1) support applications with diverse scheduling requirements in open systems, and (2) provide load isolation between applications, users, and other resource principals. Most existing work on hierarchical scheduling has focused on systems that prov... | | 2001-01-01 |
| 154 |
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Regehr, John | Efficient type and memory safety for tiny embedded systems | We report our experience in implementing type and memory safety in an efficient manner for sensor network nodes running TinyOS: tiny embedded systems running legacy, C-like code. A compiler for a safe language must often insert dynamic checks into the programs it produces; these generally make progr... | | 2006-01-01 |
| 155 |
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Chatterjee, Niladrish; Balasubramonian, Rajeev; Davis, Alan L. | Rethinking DRAM design and organization for energy-constrained multicores | DRAM vendors have traditionally optimized for low cost and high performance, often making design decisions that incur energy penalties. For example, a single conventional DRAM access activates thousands of bitlines in many chips, to return a single cache line to the CPU. The other bits may be access... | DRAM power consumption; Data-center power; Multicore memory; Trapeze Interactive Poster | 2010-03-15 |
| 156 |
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Johnson, Robert R. | Patterns of patterns | Purpose of this Poster is to demonstrate that it takes the patterns of values in all the many dimensions to place each patient in the final patterns shown in each of the 5 charts. The final patterns determine the ability of each technology to identify or distinguish patients in each class. It is p... | Gene patterns; Colon cancer; Trapeze Interactive poster | 2010-03-15 |
| 157 |
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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;... | | |
| 158 |
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Berzins, Martin | Adaptive high-order discontinuous galerkin solution of elastohydrodynamic lubrication point contact problems | This paper describes an adaptive implementation of a high order Discontinuous Galerkin (DG) method for the solution of elastohydrodynamic lubrication (EHL) point contact problems. These problems arise when modelling the thin lubricating film between contacts which are under sufficiently high pressur... | | 2012-01-01 |
| 159 |
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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... | | |
| 160 |
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Li, Peng; Regehr, John | T-check: bug finding for sensor networks | A safety property is true if something bad never happens. If any state in an execution violates the safety property, the entire execution violates that property. A liveness property holds if something good will eventually happen. An execution satisfies a liveness property if the execution will en... | | 2010-02-26 |
| 161 |
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Regehr, John; Pagariya, Rohit Pannalalji | Direct equivalence testing | Testing embedded software is difficult. • Further complicated by presence of memory and type safety errors in software. • Compiler contain various known bugs. Developers are skeptical to upgrade the compilers. • Is your embedded software affected by memory safety and compilation erro... | | |
| 162 |
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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 |
| 163 |
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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. | | |
| 164 |
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Nguyen, Hoa Thanh; Nguyen, Thanh Hoang; Freire, Juliana | DeepPeep: A Form Search Engine | We present DeepPeep (http://www.deeppeep.org), a new search engine specialized in Web forms. DeepPeep uses a scalable infrastructure for discovering, organizing and analyzing Web forms which serve as entry points to hidden-Web sites. DeepPeep provides an intuitive interface that allows users t... | | |
| 165 |
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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 |
| 166 |
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Regehr, John | Atomicity and visibility in tiny embedded systems | Visibility is a property of a programming language's memory model that determines when values stored by one concurrent computation become visible to other computations. Our work exploits the insight that in nesC, a C-like language with explicit atomicity, the traditional way of ensuring timely visib... | | 2006-01-01 |
| 167 |
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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 |
| 168 |
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Pascucci, Valerio | Morse theory and its application | Discussion of Morse Theory | Morse; Morse-Smale; Topology; Algorithms; Terrain; Analysis | |
| 169 |
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Kumar, Sidharth; Pascucci, Valerio | Remote visualization | Generalized Architecture and pipeline for a remote site | | |
| 170 |
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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 |
| 171 |
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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 ... | | |
| 172 |
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Pugsley, Seth H; Spjut, Josef Bo; Nellans, David W; Balasubramonian, Rajeev | SWEL: hardware cache coherence protocols to map shared data onto shared caches | In chip multiprocessors, replication of cache lines is allowed to reduce the latency each core has to access a cache line. Because of this replication, it is possible for one copy of data to become out of date if another copy of that data is modified. How a MESI protocol accomplishes this: ? K... | | |
| 173 |
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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... | | |
| 174 |
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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... | | |
| 175 |
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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 |
