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Displaying 1-12 out of 12 total
Social Genome: Putting Big Data to Work for Population Informatics
Found in: Computer
By Hye-Chung Kum,Ashok Krishnamurthy,Ashwin Machanavajjhala,Stanley C. Ahalt
Issue Date:January 2014
pp. 56-63
Data-intensive research using distributed, federated, person-level datasets in near real time has the potential to transform social, behavioral, economic, and health sciences--but issues around privacy, confidentiality, access, and data integration have sl...
OnTimeDetect: Dynamic Network Anomaly Notification in perfSONAR Deployments
Found in: Modeling, Analysis, and Simulation of Computer Systems, International Symposium on
By Prasad Calyam, Jialu Pu, Weiping Mandrawa, Ashok Krishnamurthy
Issue Date:August 2010
pp. 328-337
To monitor and diagnose bottlenecks on network paths used for large-scale data transfers, there is an increasing trend to deploy measurement frameworks such as perfSONAR. These deployments use web-services to expose vast data archives of current and histor...
Climatologies Based on the Weather Research and Forecast (WRF) Model
Found in: DoD High Performance Computing Modernization Program Users Group Conference (HPCMP-UGC 2009)
By Francois Vandenberghe,Mike Barlage,Scott Swerdlin,Judith Gardiner,Ashok Krishnamurthy,Alan Chalker
Issue Date:June 2009
pp. 249-253
Because tests at Army Test and Evaluation Command (ATEC) ranges can often only be conducted under specific atmospheric conditions, climatologies of each range could be a very useful tool for long-range test planning. Such datasets can provide the probabili...
Experiences from Cyberinfrastructure Development for Multi-user Remote Instrumentation
Found in: eScience, IEEE International Conference on
By Prasad Calyam, Abdul Kalash, Neil Ludban, Sowmya Gopalan, Siddharth Samsi, Karen Tomko, David E. Hudak, Ashok Krishnamurthy
Issue Date:December 2008
pp. 293-300
Computer-controlled scientific instruments such as electron microscopes, spectrometers, and telescopes are expensive to purchase and maintain. Also, they generate large amounts of raw and processed data that has to be annotated and archived. Cyber-enabling...
Developing a Computational Science IDE for HPC Systems
Found in: Software Engineering for High Performance Computing Applications, International Workshop on
By David E. Hudak, Neil Ludban, Vijay Gadepally, Ashok Krishnamurthy
Issue Date:May 2007
pp. 5
Software engineering studies have shown that programmer productivity is improved through the use of computational science integrated development environments (or CSIDE, pronounced ?sea side?) such as MATLAB. ParaM is a CSIDE distribution which provides par...
Applications in Parallel MATLAB
Found in: HPCMP Users Group Conference
By Brian Guilfoos, Judy Gardiner, Juan Carlos Chaves, John Nehrbass, Stanley Ahalt, Ashok Krishnamurthy, Jose Unpingco, Alan Chalker, Laura Humphrey, Siddharth Samsi
Issue Date:June 2006
pp. 445-448
The parallel MATLAB implementations used for this project are MatlabMPI[1] and pMatlab[1], both developed by Dr. Jeremy Kepner at MIT-LL. MatlabMPI is based on the Message Passing Interface standard, in which processes coordinate their work and communicate...
Interfacing PC-based MATLAB Directly to HPC Resources
Found in: HPCMP Users Group Conference
By John Nehrbass, Siddharth Samsi, Juan Carlos Chaves, Jose Unpingco, Brian Guilfoos, Stanley Ahalt, Ashok Krishnamurthy, Alan Chalker, Judy Gardiner
Issue Date:June 2006
pp. 440-444
Many DoD HPC users, particularly in the SIP area, run codes developed with MATLAB and related applications (MatlabMPI, StarP, pMatlab, etc.). There is a desire to run codes from a desktop instance of MATLAB and connect to and interact with codes running on...
Octave and Python: High-Level Scripting Languages Productivity and Performance Evaluation
Found in: HPCMP Users Group Conference
By Juan Carlos Chaves, John Nehrbass, Brian Guilfoos, Judy Gardiner, Stanley Ahalt, Ashok Krishnamurthy, Jose Unpingco, Alan Chalker, Andy Warnock, Siddharth Samsi
Issue Date:June 2006
pp. 429-434
Octave and Python are open source alternatives to MATLAB, which is widely used by the High Performance Computing Modernization Program (HPCMP) community. These languages are two well known examples of high-level scripting languages that promise to increase...
Distributed Tests: An ARMY Perspective
Found in: HPCMP Users Group Conference
By Kenneth G., Ken Yetzer, Mike Stokes, Ashok Krishnamurthy, Alan Chalker
Issue Date:June 2006
pp. 337-346
At the heart of Network Centric Warfare is the ability for all assets on the battlefield to communicate and coordinate their actions. Therefore, as these systems are being developed they must be tested and evaluated together along with other assets in a ne...
Enhancements to MatlabMPI: Easier Compilation, Collective Communication, and Profiling
Found in: HPCMP Users Group Conference
By Judy Gardiner, John Nehrbass, Juan Carlos Chaves, Brian Guilfoos, Stanley Ahalt, Ashok Krishnamurthy, Jose Unpingco, Alan Chalker, Siddharth Samsi
Issue Date:June 2006
pp. 435-439
This paper provides a brief overview of several enhancements made to the MatlabMPI suite. MatlabMPI is a pure MATLAB code implementation of the core parts of the MPI specifications. The enhancements provide a more attractive option for HPCMP users to desig...
A User-Steered Energy Generation and Consumption Multi-Model Simulation for Pricing and Policy Development
Found in: Computing in Science & Engineering
By Harrison Smith,Amy Pielow,Adithya Jayakumar,Matteo Muratori,Benjamin Yurkovich,Ramteen Sioshansi,Ashok Krishnamurthy,Giorgio Rizzoni,Matthew Roberts
Issue Date:May 2013
pp. 1
Understanding energy generation and consumption is more critical than ever. While simulation is a valuable tool, such models are by necessity simplified abstractions of actual energy systems. We present a steerable energy system multi-model implemented wit...
A robust on-the-fly pitch (OTFP) estimation algorithm
Found in: Proceedings of the 12th annual ACM international conference on Multimedia (MULTIMEDIA '04)
By Ashok Krishnamurthy, Saurabh Sood
Issue Date:October 2004
pp. 280-283
Pitch detection or fundamental frequency (f<inf>0</inf>) estimation is a classical research topic and has been extensively studied for many years. Pitch estimation by embedding speech signal into multiple state-space dimensions is a relatively rece...