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Displaying 24276 - 24300 of 73726

Low-Temperature Tunneling and Rotational Dynamics of the Ammonium Cations in (NH 4 ) 2 B 12 H 12

September 1, 2011
Author(s)
Kristina Verdal, Terrence J. Udovic, John J. Rush, Vitalie Stavila, Hui Wu, Wei Zhou, Timothy Jenkins
Low-temperature neutron scattering spectra of diammonium dodecahydro-closo-dodecaborate [(NH4)2B12H12] reveal two NH 4 + rotational tunneling peaks (e.g., 18.5 υeV and 37 υeV at 4 K), consistent with the tetrahedral symmetry and environment of the cations

Metal Amidoboranes

September 1, 2011
Author(s)
Hui Wu, Wei Zhou, Taner Yildirim
Metal amidoboranes, consisting of [NH 2BH 3]- anion and various metal cations, are a new class of compounds that have recently attracted great attentions due to their intriguing crystal structures and novel chemical and physical properties. Similar to

Modeling and Simulation of Healthcare Systems for Homeland Security Applications

September 1, 2011
Author(s)
Charles R. McLean, Yung-Tsun Lee, Sanjay Jain, Charles W. Hutchings
The purpose of this document is to provide a foundation for establishing a modeling and simulation technical interest group whose focus is information exchange on healthcare issues. The document defines an initial set of user/customer needs and system

Modeling and Simulation of Incident Management for Homeland Security Applications

September 1, 2011
Author(s)
Charles R. McLean, Yung-Tsun Lee, Sanjay Jain, Charles W. Hutchings
The purpose of this document is to provide: 1) a compendium of information pertaining to incident management modeling and simulation, and 2) a foundation for the establishment of a modeling and simulation technical interest group whose focus is information

On the electronic excited state dynamics of vibronic transitions. High resolution electronic spectra of acenaphthene and its argon van der Waals complex in the gas phase.

September 1, 2011
Author(s)
Leonardo Avarez-Valtierra, David F. Plusquellic, John T. Yi, David W. Pratt
Rotationally resolved fluorescence excitation spectroscopy has been used to study the dynamics, electronic distribution, and the relative orientation of the transition moment vector in several vibronic transitions of acenaphthene (ACN) and in its Ar van

Reflectivity Study of Microwave Blackbody Targets

September 1, 2011
Author(s)
Dazhen Gu, Derek A. Houtz, James P. Randa, Dave K. Walker
We report on the characterization of blackbody target reflections as part of the recent progress on the development of brightness temperature standards for microwave remote sensing at the National Institute of Standards and Technology (NIST). The very low

Rotationally Resolved C2 Symmetric Conformers of Bis-(4-hydroxyphenyl)methane: Textbook Examples of Excitonic Coupling in the S1 and S2 Electronic States

September 1, 2011
Author(s)
Shin G. Chou, Chirantha P. Rodrigo, Christian Muller, Kevin O. Douglass, Timothy Zwier, David F. Plusquellic
Rotationally resolved microwave and ultraviolet spectra of jet-cooled bis-4 hydroxy)-diphenylmethane (b4HBM) have been obtained using Fourier-transform microwave and UV laser/molecular beam spectrometers. A recent vibronic level study of b4HPM1 has

Single Photon Detection Using Frequency Up-conversion with Pulse Pumping

September 1, 2011
Author(s)
Lijun Ma, Oliver T. Slattery, Xiao Tang
This chapter delivers a general overview of the theoretical and experimental results of single photon up-conversion detectors with pulse pumping. After a brief introduction, we provide a detailed coverage of several key applications of up-conversion

Structural and Electromagnetic Scenarios for Firefighter Locator Tracking Systems

September 1, 2011
Author(s)
Anthony D. Putorti Jr., Francine K. Amon, Kathryn M. Butler, Catherine A. Remley, William F. Young, Christina Spoons
One of the most important aspects of effective firefighter response to an emergency event is awareness of the location of the firefighters involved, especially in cases with limited visibility due to darkness, heavy smoke, or unfamiliar and changing

SURF III: A flexible Synchrotron Radiation Source for Radiometry and Research

September 1, 2011
Author(s)
Uwe Arp, Charles W. Clark, Lu Deng, Nadir S. Faradzhev, Alex P. Farrell, Mitchell L. Furst, Steven E. Grantham, Edward W. Hagley, Shannon B. Hill, Thomas B. Lucatorto, Ping-Shine Shaw, Charles S. Tarrio, Robert E. Vest
The calculability of synchrotron radiation (SR) makes electron storage rings wonderful light sources for radiometry. The broadband nature of SR allows coverage of the whole spectral region from the x-ray to the far-infrared. Compact low-energy storage

Why Alite Stops Hydrating Below 80% Relative Humidity

September 1, 2011
Author(s)
Robert J. Flatt, George W. Scherer, Jeffrey W. Bullard
Cement hydration continues to have an intriguing character, surrounded as it is by a number of intensively debated questions. Among the unresolved issues is the reason why hydration stops at a relative humidity of about 80%, even though the system still

A Decision-Guided Energy Management Framework for Sustainable Manufacturing

August 31, 2011
Author(s)
Guodong Shao, Alexander Brodsky, Jorge Arinez , Daniel A. Menasce , Paul Ammann
A growing number of manufacturing industries are initiating efforts to address sustainability issues. According to the National Association of Manufacturers, the manufacturing sector currently accounts for about one third of all energy consumed in the

A STANDARD ANALYSIS APPROACH TO DETERMINE PRODUCT APPLICABILITY

August 31, 2011
Author(s)
Paul W. Witherell, Prabir Sarkar, Anantha Narayanan Narayanan, Jae H. Lee, Sudarsan Rachuri
Standards and regulations have become an important part of today’s society. Organizational and geographical dispersions of standards often create situations where manufacturers are forced to meet various standards for a product to reach expanded markets or

AN INFORMATION MODELING METHODOLOGY FOR STANDARDS

August 31, 2011
Author(s)
Anantha Narayanan Narayanan, Jae H. Lee, Paul W. Witherell, Prabir Sarkar, Sudarsan Rachuri
Standards are developed and introduced in the market to meet the needs of specific domains. Developed by experts within a particular domain, the modeling requirements necessary to represent the information associated with these standards are often not well
Displaying 24276 - 24300 of 73726
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