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Displaying 26 - 50 of 108

Diesel Surrogate Fuels for Engine Testing and Chemical-Kinetic Modeling: Compositions and Properties

January 7, 2016
Author(s)
Charles J. Mueller, William J. Cannella, J. Timothy Bays, Thomas J. Bruno, Kathy DeFabio, Heather Dettman, Rafal M. Gieleciak, Marcia L. Huber, Chol-Bum Kweon, Steven S. McConnell, William J. Pitz, Matthew A. Ratcliff
The primary objectives of this work were to formulate, blend, and characterize a set of four ultra-low-sulfur diesel surrogate fuels in quantities sufficient to enable their study in single-cylinder engines and combustion-vessel experiments. The surrogate

An Industrial Control System Cybersecurity Performance Testbed

December 10, 2015
Author(s)
Richard Candell, Timothy A. Zimmerman, Keith A. Stouffer
The National Institute of Standards and Technology (NIST) is developing a cybersecurity performance testbed for industrial control systems. The goal of the testbed is to measure the performance of industrial control systems (ICS) when instrumented with

Cyber-Physical Systems Framework

November 2, 2015
Author(s)
David A. Wollman
Two worlds that have operated independently—the digital and physical worlds—are now merging, creating opportunities that will transform many sectors of our society. These new smart systems are based on engineered interacting networks of physical and

Intelligence Level Performance Standards Research for Autonomous Vehicles

October 1, 2015
Author(s)
Roger V. Bostelman, Tsai H. Hong, Elena R. Messina
U.S. and European safety standards have evolved to protect workers near Automated Guided Vehicles (AGV's). However, only recently performance standards have begun development for AGV's and mobile robots. Lessons can be learned for developing such a

Direct Measurement of Trace Polycyclic Aromatic Hydrocarbons in Diesel Fuel with 1H and 13C NMR Spectroscopy: Effect of PAH Content on Fuel Lubricity

June 17, 2015
Author(s)
Peter Y. Hsieh, Jason A. Widegren, Andrew Slifka, Andrew J. Hagen, Ronald A. Rorrer
Surface-active trace compounds present in diesel fuels protect pumps and injectors against premature wear through boundary lubrication. Due to the vast number of hydrocarbon compounds found in petroleum distillate fuels, it is difficult to measure the

Navigation Performance Evaluation for Automated Guided Vehicles

May 12, 2015
Author(s)
Roger V. Bostelman, Tsai Hong Hong, Geraldine S. Cheok
Automatic guided vehicles (AGVs), an industrial form of mobile robot, typically navigate using a central computer commanding AGV movement on predefined paths. Although, how well they follow these paths is less defined in research articles and their

Literature Review of Mobile Robots for Manufacturing

May 6, 2015
Author(s)
Michael O. Shneier, Roger V. Bostelman
Mobile robots are devices that can move autonomously to accomplish their goals. This paper provides a review of such robots, mainly oriented towards manufacturing applications. It describes the kinds of mobile robots that are used and what criteria are

Performance Measurement of Mobile Manipulators

April 24, 2015
Author(s)
Roger V. Bostelman, Tsai Hong Hong, Jeremy A. Marvel
This paper describes a concept for measuring the reproducible performance of mobile manipulators to be used for assembly or other similar tasks. An AGV with an onboard robot arm was programmed to repeatedly move to and stop at a novel, reconfigurable

Modeling RP-1 fuel advanced distillation data using comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry and partial least squares analysis

October 15, 2014
Author(s)
Thomas J. Bruno, Benjamin Kehimkar, Brendon Parsons, Jamin C. Hoggard, M. C. Billingsley, R. E. Synovec
Recent efforts in predicting rocket propulsion (RP-1) fuel performance through modeling put greater emphasis on obtaining detailed and accurate fuel properties, as well as to elucidate the relationships between fuel composition and their properties. Herein

Control Fusion for Safe Multi-robot Coordination

May 9, 2014
Author(s)
Roger V. Bostelman, Jeremy A. Marvel
Future smart manufacturing systems will include more complex coordination of mobile manipulators (e.g., robot arms mounted on mobile bases). The National Institute of Standards and Technology, Performance of Collaborative Robot Systems Project has been

Compressed-liquid Density Measurements of Three Alternative Turbine Fuels

February 7, 2014
Author(s)
Stephanie L. Outcalt
Compressed-liquid densities of three alternative turbine fuels have been measured. The measurements were made from 270 K to 470 K, and 0.5 MPa to 50 MPa. The data have been correlated with a Tait equation, and parameters are given for each fuel. Results of

Composition-Explicit Distillation Curves of Alternative Turbine Fuels

December 3, 2013
Author(s)
Raina V. Gough, Thomas J. Bruno
In recent years, environmental considerations, the potential for supply disruptions, and rising fuel prices have led to the development of turbine fuels produced from non-petroleum feedstocks. To determine the suitability of an alternative turbine fuel, it

FATIGUE CRACK GROWTH OF TWO PIPELINE STEELS IN A PRESSURIZED HYDROGEN ENVIRONMENT

October 22, 2013
Author(s)
Andrew J. Slifka, Elizabeth S. Drexler, Nicholas Nanninga, Yaakov Levy, Joseph D. McColskey, Robert L. Amaro
Fatigue crack growth tests were conducted on two pipeline steel alloys, API 5L X52 and X100. Baseline tests were conducted in air, and those results were compared with tests conducted in pressurized hydrogen gas. All tests were run at (load ratio) R = 0.5

Fatigue Crack Growth Modeling of Pipeline Steels in High Pressure Gaseous Hydrogen

October 21, 2013
Author(s)
Robert L. Amaro, Elizabeth S. Drexler, Andrew J. Slifka
Hydrogen will likely play a key role in a future clean energy economy. However, fundamental understanding of the deleterious effects of hydrogen on the fatigue and fracture properties of pipeline steels is lacking. Furthermore, engineering tools for design

Forensic Science Laboratories: Handbook for Facility Planning, Design, Construction, and Relocation.

June 25, 2013
Author(s)
James Aguilar, Tom Barnes, Joseph Browne, Yvette Burney, John Byrd, Bonnie Carver, Adam Denmark, Susan Halla, Lou Hartman, Alison Kennedy, Deborah Leben, Greg Matheson, Jim McClaren, Russell McElroy, Romeo Miranda, Kenneth Mohr, Michael Mount, Steve Sigel, Jennifer Smither, Melissa Taylor, Aliece Watts, Shannan Williams
This handbook is a resource for laboratory directors, designers, consultants, and other stakeholders involved in the construction or major renovation of forensic science laboratories. Laboratory construction and renovation projects must meet the unique

Thermal Decomposition Kinetics of 1,3,5-Triisopropylcyclohexane

May 29, 2013
Author(s)
Raina V. Gough, Jason A. Widegren, Thomas J. Bruno
Recent surrogate diesel fuel mixture development identified the need for a multiply-substituted, low cetane number, high molecular mass monocycloalkane component. On the basis of a thermophysical property evaluation and prediction, 1,3,5
Displaying 26 - 50 of 108