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Displaying 11501 - 11525 of 73927

Progress in Ground-source Heat Pumps Using Natural Refrigerants

August 1, 2018
Author(s)
Wei Wu, Harrison Skye, Lingnan Lin
Hydrofluorocarbon (HFC) and hydrochlorofluorocarbon (HCFC) refrigerants with high Global Warming Potential (GWP) will be phased down significantly under the Montreal Protocol. Natural refrigerants have a very low GWP and are inexpensive, and therefore are

Stone-Cold Low Temperature Cathodoluminescence Spectrometry of Quartz (SiO2)

August 1, 2018
Author(s)
Edward P. Vicenzi, Scott A. Wight
Cathodoluminescence (CL) studies of quartz have been useful in Earth sciences for understanding geological cycling, quantitative trace element concentrations and thermal properties of crystallization, as well as serving as a petrographic aid to interpret

Aggregation and Solubility of a Model Conjugated Donor-Acceptor Polymer

July 31, 2018
Author(s)
Daniel R. Reid, Nicholas E. Jackson, Alexander J. Bourque, Chad R. Snyder, Ronald L. Jones, Juan de Pablo
In organic semiconductors, solution-phase polymer structure and aggregation have a strong influence on device morphology and performance. Thus, understanding solubility of conjugated polymers is crucial for their rational design. Using a combination of

Cybertrust in the IoT Age

July 31, 2018
Author(s)
Jeff Voas, D. Richard Kuhn, Constantinos Kolias, Angelos Stavrou, Georgios Kambourakis
The Internet of Things generates new opportunities but creates new challenges with respect to trustworthiness. Computing, architecture, and verification changes are inevitable to meet these challenges, particularly if predictions of 20 billion to 50

Reasoning about Smart City

July 31, 2018
Author(s)
Edward R. Griffor, Martin J. Burns, David A. Wollman, Marcello Balducinni, Claire Vishik, Michael Huth
Smart Cities are complex environments, comprising diverse cyber-physical systems (CPS), including Internet of Things (IoT). Smart Cities pose challenges of scale, integration, interoperability, sophisticated processes, governance, human elements

Using the IES-City Framework

July 31, 2018
Author(s)
Martin J. Burns, Joe Manganelli
This paper introduces a use case for using the IES-City Framework artifacts and methodology in the acquisition of a new smart city feature. Involving city management and potential service providers, it shows how this new feature can be acquired with

Voices of First Responders - Identifying Public Safety Communication Problems: Findings from User-Centered Interviews, Phase 1, Volume 1

July 31, 2018
Author(s)
Yee-Yin Choong, Shanee T. Dawkins, Susanne M. Furman, Kristen Greene, Sandra S. Prettyman, Mary F. Theofanos
The public safety community is in the process of transitioning from the use of land mobile radios to a technology ecosystem including a variety of broadband data sharing platforms. Successful deployment and adoption of new communication technology relies

A new realization of SI for organic chemical measurement: NIST PS1 Primary Standard for quantitative NMR (Benzoic Acid)

July 30, 2018
Author(s)
Michael A. Nelson, Jason F. Waters, Blaza Toman, Brian E. Lang, Alexander R?ck, Kathrin Breitruck, Markus Obkircher, Anthony Windust, Katrice A. Lippa
Metrological traceability to common references supports the comparability of chemical measurement results produced by different analysts, at various times, and at separate places. Ideally, these references are realizations of base units of the

Assessing Coverage and Throughput for D2D Communication

July 30, 2018
Author(s)
Jian Wang, Richard A. Rouil
In this paper, we address the issue of assessing the performance of a Device-to-Device (D2D) communication link. Particularly, we design a framework to evaluate performance with respect to the coverage probability and average throughput. Our modeling

Controllable Wide-range n- and p-Doping of Monolayer Group 6 Transition-metal Disulfides and Diselenides

July 30, 2018
Author(s)
Siyuan Zhang, Heather M. Hill, Curt A. Richter, Angela R. Hight Walker, Barlow Stephen, Seth Marder, Christina A. Hacker, Sujitra J. Pookpanratana
Developing processes to controllably dope transition-metal dichalcogenides (TMDs) is critical to achieving commercial integration for optical and electrical applications. In this study, molecular reductants and oxidants are introduced onto a series of

Coupled experimental and computational study of residual stresses of additively manufactured Ti-6Al-4V components

July 30, 2018
Author(s)
Maria Strantza, Rishi Ganeriwala, Bjorn Clausen, Thien Q. Phan, Lyle E. Levine, D Pagan, Wayne King, Niel Hodge, Brown Donald
The production of metallic parts via laser-powder bed fusion (L-PBF) additive manufacturing is rapidly growing. To use components produced via L-PBF in safety-critical applications, a high degree of quality confidence is required. This qualification can be
Displaying 11501 - 11525 of 73927
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