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Displaying 1 - 17 of 17

Three-Dimensional Shape Analysis of Coarse Aggregates: Methodology and Preliminary Results on Several Different Coarse Aggregates

October 12, 2021
Author(s)
S T. Erdogan, P N. Quiroga, D Fowler, H A. Saleh, Richard A. Livingston, Edward Garboczi, Peter M. Ketcham, John G. Hagedorn, Steven G. Satterfield
The shape of aggregates used in concrete is an important parameter that helps determine many concrete properties. The mathematical technique of spherical harmonic analysis was recently demonstrated to be able to effectively analyze three dimensional

Application Creation for an Immersive Virtual Measurement and Analysis Laboratory

December 21, 2016
Author(s)
Wesley N. Griffin, William L. George, Terence J. Griffin, John G. Hagedorn, Thomas M. Olano, Steven G. Satterfield, James S. Sims, Judith E. Terrill
Content creation for realtime interactive systems is a difficult problem. In game development, content creation pipelines are a major portion of the code base and content creation is a major portion of the budget. In research environments, the choice of

A 4D Immersive Platform to Visualize RF Propagation in BAN

January 1, 2015
Author(s)
John G. Hagedorn, Kamran Sayrafian, Judith E. Terrill, Kamya Yekeh Yazdandoost
Recent advances in micro-electronics technology to build small radio-enabled implantable and wearable medical sensors have sparked considerable interest in body area networks. Understanding the characteristics of radio frequency propagation inside and

High Performance Visualization in Science and Research

December 6, 2014
Author(s)
Tomasz P. Bednarz, John Taylor, Tony Huang, Wesley N. Griffin, Steven G. Satterfield, Judith E. Terrill, John G. Hagedorn
This work showcases four examples of scientific visualizations across various domains of research and science that were prepared at CSIRO in Australia, and NIST in the USA: visualization of bone cancer, RF propagation through the human body, touch-less

A Dynamic Human Body Computational Phantom for RF Propagation Study

May 20, 2013
Author(s)
John G. Hagedorn, Kamran Sayrafian, Judith E. Terrill
Recent advances in micro-electronics technology to build small radio-enabled implantable and wearable medical sensors have sparked considerable interest in further understanding the characteristics of radio frequency propagation inside the human body. As

Correction of Location and Orientation Errors in Electromagnetic Motion Tracking

August 1, 2007
Author(s)
John G. Hagedorn, Steven G. Satterfield, John T. Kelso, W. Austin, Judith E. Terrill, Adele Peskin
We describe a method for calibrating an electromagnetic motion tracking device. Algorithms for correcting both location and orientation are presented. In particular, we use a method for interpolating rotation corrections at scattered data points that has

Science at the Speed of Thought

February 1, 2005
Author(s)
J E. Devaney, Steven G. Satterfield, John T. Kelso, Adele Peskin, William L. George, John G. Hagedorn, Terence J. Griffin, Howard Hung, R D. Kriz

A Genetic Programming Ecosystem

April 1, 2001
Author(s)
J E. Devaney, John G. Hagedorn, O P. Nicolas, G Garg, A Samson, Martial Michel
Algorithms are needed in every aspect of parallel computing. Genetic Programmingis an evolutionary technique for automating the design of algorithms throughiterative steps of mutation and crossover operations on an initial population of randomly generated

The Interoperable Message Passing Interface (IMPI) Extensions to LAM/MPI

March 1, 2001
Author(s)
J M. Squyers, A Lumsdaine, William L. George, John G. Hagedorn, J E. Devaney
Interoperable Message Passing Interface (IMPI) is a protocol specification to allow multiple MPI implementations to cooperate on a single MPI job. Unlike portable MPI implementations, an IMPI-connected parallel job allows the use of vendor-tuned message
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