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Displaying 12251 - 12275 of 73755

Neutron Interferometry Detection of Early Crack Formation in Fatigued Additively Manufactured SS316 Dogbones

February 15, 2018
Author(s)
Daniel S. Hussey, Hong Yao, Adam J. Brooks, Ali Haghshenas, Jumao Yuan, Caroline G. Lowery, Jacob M. LaManna, David L. Jacobson, Nikolay Kardjilov, Shengmin Guo, Michael M. Khonsari, Leslie G. Butler
Fatigue in selective laser melted (SLM) and conventional SS316 dogbones was studied with neutron imaging methods for attenuation, scattering, and diffraction. To detect the microcrack evolution in fatigued samples,two methods of grating-based neutron

Computer Science in Education 2018

February 14, 2018
Author(s)
Jeff Voas, D. Richard Kuhn, Celia Paulsen, Kim B. Schaffer
We surveyed six of our profession's best senior computer science educators for their views on the current state and trends in computer science education.

The Technical Specification for the Security Content Automation Protocol (SCAP) Version 1.3

February 14, 2018
Author(s)
David A. Waltermire, Stephen D. Quinn, Harold Booth, Karen Scarfone, Dragos Prisaca
The Security Content Automation Protocol (SCAP) is a suite of specifications that standardize the format and nomenclature by which software flaw and security configuration information is communicated, both to machines and humans. This publication, along

Acid-induced and pH-controlled Reversible Switching of Broad-Spectrum Antibacterial Activity

February 13, 2018
Author(s)
Yin Y. Nelson, Vytautas Reipa, Xiaohong Wang, Kenneth Mineart, Vivek M. Prabhu, Nancy J. Lin, Jirun Sun
Bacterial resistance to antimicrobials is threatening millions of human lives due to indiscriminate overuse and environmental build-up of antibiotics. We present the smart regulation of antibacterial activity in biologically relevant conditions to reduce

Insertion of Dengue E into Lipid Bilayers Studied by Neutron Reflectivity Molecular Dynamics Simulations

February 13, 2018
Author(s)
Juan M. Vanegas, Frank Heinrich, David M. Rogers, Bryan D. Carson, Sadie La Bauve, Briana C. Vernon, Sushil K. Satija, Aihua Zheng, Margaret Kielian, Susan B. Rempe, Michael S. Kent
The envelope (E) protein of Dengue virus rearranges to a trimeric hairpin to mediate fusion of the viral and target membranes, which essential for infectivity. Insertion of E into the target membrane serves to anchor E and possibly also to disrupt local

Measurement of Radio-Frequency Radiation Pressure

February 13, 2018
Author(s)
Christopher L. Holloway, Alexandra B. Artusio-Glimpse, Matthew T. Simons, Ivan Ryger
In this work we perform measurements of the radiation pressure of a radio-frequency (RF) electromagnetic field which will lead to a new SI traceable power calibration. There are several groups around the world investigating methods to perform more direct

Spontaneous Decay of a Soft Optical Phonon in the Relaxor Ferroelectric PbMg 1/3 Nb 2/3 O 3

February 13, 2018
Author(s)
C. Stock, Peter M. Gehring, R. A. Ewings, Guangyong Xu, Jiefang Li, Dwight Viehland, Haosu Luo
We report the spontaneous decay of a soft, optical phonon in a solid. Using neutron spectroscopy, we find that specific phonon lifetimes in the relaxor PbMg 1/3Nb 2/3O 3 are anomalously short within well-defined ranges of energy and momentum. This behavior

Standard Reference Material 2378 Fatty Acids in Frozen Human Serum. A Clinical SRM based on Endogenous Supplementation of Polyunsaturated Fatty Acids

February 13, 2018
Author(s)
Bruce A. Benner Jr., Michele M. Schantz, Johanna Camara, Katherine E. Sharpless, James H. Yen, Lorna T. Sniegoski, Carissa D. Powers, Rosemary L. Schleicher
Dietary fatty acids can be both beneficial and detrimental to human health depending on the degree and type of saturation. Healthcare providers and research scientists monitor the fatty acid content of human plasma and serum as an indicator of health

A Kinetics Based Models for Environmentally Induced Sealant Degradation

February 12, 2018
Author(s)
Donald L. Hunston, Christopher C. White
Caulks and sealants are a critical part of any structure that is exposed to the environment. Although they are good materials, they eventually fail, and the failure is often difficult to detect before extensive damage is generated by water ingress or loss

Investigation of Residential Cooking Fire Suppression Technologies

February 12, 2018
Author(s)
Anthony P. Hamins, Daniel Madrzykowski, Sung C. Kim, Jonathan Kent
A wide range of cooking fire experiments were conducted to examine the effectiveness of retrofit residential kitchen fire suppression systems. A series of experiments provided data on the hazard associated with cooking oil fires. Then, a series of real

NISTfit: A natively multithreaded C++11 framework for model development

February 12, 2018
Author(s)
Ian H. Bell, Matthias Kunick
The current trend in computer architecture is for increasingly parallel computation while the clock frequency stagnates. The increase in computing speed is achieved by dividing a process into several threads which are executed in parallel on multiple

Optimizing Self-Consistent Field Theory Block Copolymer Models with X-Ray Metrology

February 12, 2018
Author(s)
Adam F. Hannon, Daniel Sunday, Alec Bowen, Gurdaman Khaira, Jiaxing Ren, Paul Nealey, Juan de Pablo, Regis J. Kline
A block copolymer self-consistent field theory (SCFT) model is used for direct analysis of experimental X-ray scattering data obtained from thin films of polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA) made from directed self-assembly. In a departure

Synchrotron Methods for Flexible Hybrid Electronics Industrial Recommendations on Interagency (DoC-DoD-DoE) Partnerships to Address Measurement Challenges Hindering the Flexible Hybrid Electronics Manufacturing Ecosystem

February 12, 2018
Author(s)
Christopher L. Soles, Richard A. Vaia, Ronald Pindak
The round-table participants concluded that facilities at NSLS-II provide immediate opportunities to address some of the critical processing and measurement challenges that are blocking the path towards a sustainable US-centric Flexible Hybrid Electronic

Unsupervised Clustering for Millimeter-Wave Channel Propagation Modeling

February 11, 2018
Author(s)
Jian Wang, Camillo Gentile, Jelena Senic, Roy Sun, Peter B. Papazian
We have designed and assembled millimeter-wave channel sounders at 28, 60, and 83 GHz. They can measure the three-dimensional (azimuth and elevation) double-directional angle (angle-of- departure and angle-of-arrival) of channel multipath components as

Development of Orthogonal NISTmAb Size Heterogeneity Control Methods

February 10, 2018
Author(s)
Abigail Turner, Katharina S. Yandrofski, Srivalli Telikepalli, N. Alan Heckert, James J. Filliben, Dean C. Ripple, John E. Schiel
The NISTmAb is an innovative monoclonal antibody reference material from the National Institute of Standards and Technology; it is a class-representative IgG1κ intended to serve as a pre-competitive platform for harmonization and technology development in

Doping-Induced Redistribution of Magnetic Spectral Weight in the Substituted Hexaborides Ce 1-x La x B 6 and Ce 1-x Nd x B 6

February 9, 2018
Author(s)
S. E. Nikitin, P. Y. Portnichenko, A. V. Dukhnenko, N.Yu. Shitsevalova, V. B. Filipov, Yiming Qiu, Jose Rodriguez Rivera, J. Ollivier, D. S. Inosov
We investigate the doping-induced changes in the electronic structure of CeB 6 on a series of substituted Ce 1-xR xB 6 and Ce 1-xNd xB 6 samples (R = La,Nd) using diffuse neutron scattering. We observe a redistribution of magnetic spectral weight across

Protein Adsorption and Layer Formation at the Stainless Steel - Solution Interface Mediates Shear-Induced Particle Formation for an IgG1 Monoclonal Antibody

February 9, 2018
Author(s)
Cavan K. Kalonia, Frank Heinrich, Joseph E. Curtis, Sid Raman, Maria A. Miller, Steven Hudson
Passage of specific protein solutions through certain pumps, tubing, and/or filling nozzles can result in the production of unwanted subvisible protein particles (SVP). In this work, surface mediated SVP formation was investigated. Specifically, the
Displaying 12251 - 12275 of 73755
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