Journals

Single Track Melt Pool Measurements and Microstructures in Inconel 625

February 20, 2018

Author(s)

Supriyo Ghosh, Li Ma, Lyle E. Levine, Richard E. Ricker, Mark R. Stoudt, Jarred C. Heigel, Jonathan E. Guyer

We use single track laser melting experiments and simulations on Inconel 625 to estimate the dimensions and microstructures of the resulting melt pools. Our...

Quantum Critical Singularities in Two-Dimensional Metallic XY Ferromagnets

February 20, 2018

Author(s)

Chandra M. Varma, W. J. Gannon, M. C. Aronson, Jose Rodriguez Rivera, Yiming Qiu

An important problem in contemporary physics concerns quantum-critical fluctuations in metals. A scaling function for the momentum, frequency, temperature and...

Hierarchical Modeling of a Manufacturing Work Cell to Promote Contextualized PHM Information Across Multiple Levels

February 19, 2018

Author(s)

Michael E. Sharp, Brian A. Weiss

With the ever-increasing demand for reconfigurability and modularity in manufacturing, industrial work cells are increasingly integrating newer and more diverse...

Semiempirical Configuration Interaction Calculations for RuCentered Dyes

February 18, 2018

Author(s)

Lisa A. Fredin, Thomas C. Allison

Computational investigation of of the photochemical properties of transition-metal-centered dyes typically involves optimization of the molecular structure...

Properties of Laser-Produced GaAs Plasmas Measured from Highly Resolved X-Ray Line Shapes and Ratios

February 17, 2018

Author(s)

Lawrence T. Hudson, John F. Seely, J. Fein, P Keiffer, R.P. Drake, C.C. Kuranz, P Belancourt, Uri Feldman

The properties of hot, dense plasmas generated by the irradiation of GaAs targets by the Titan laser at Lawrence Livermore National Laboratory were determined...

Fractal Universality in Near-Threshold Magnetic Lanthanide Dimers

February 16, 2018

Author(s)

Eite Tiesinga, Constantinos Makrides, Ming Li, Svetlana Kotochigova

Ergodic quantum systems are often quite alike whereas non-ergodic, fractal systems are unique and display characteristic properties. In this paper we explore...

Determining Mean Recurrence Intervals for Updated Wind Maps in ASCE 7-16

February 16, 2018

Author(s)

Therese P. McAllister, Naiyu Wang, Bruce Ellingwood

ASCE Standard 7 is moving toward load requirements that are consistent with reliability-based design goals characteristic of performance-based engineering (PBE)...

Observation of three-photon bound states in a quantum nonlinear medium

February 16, 2018

Author(s)

Qiyu Liang, Aditya Venkatramani, Sergio Cantu, Travis Nicholson, Michael Gullans, Alexey Gorshkov, Jeff Thompson, Cheng Chin, Mikhail Lukin, Vladan Vuletic

Examining Heat Treatment for Stabilization of the Lipidome

February 16, 2018

Author(s)

John Bowden, Candice Z. Ulmer, Christina Jones, Tracey Johnston, Jeremy P. Koelmel, Timothy J. Garrett, Richard A. Yost

Aim: To confidently determine lipid-based biomarkers, it is important to minimize variation introduced during preanalytical steps. We evaluated reducing...

Nanoscale imaging of photocurrent enhancement by resonator array photovoltaic coatings

February 15, 2018

Author(s)

Dongheon Ha, Yohan Yoon, Nikolai B. Zhitenev

Nanoscale surface patterning commonly used to increase absorption of solar cells can adversely impact the open-circuit voltage due to increased surface area and...

Carbon Nanotube-Based Black Coatings

February 15, 2018

Author(s)

John H. Lehman, Christopher S. Yung, Nathan A. Tomlin, Davis R. Conklin, Michelle S. Stephens

It has been shown that coatings comprised of carbon nanotubes are very black; that is, characterized by low reflectance over a broad wavelength range from the...

Diffusion Monte Carlo versus adiabatic computation for local Hamiltonians

February 15, 2018

Author(s)

Stephen P. Jordan, Jacob Bringewatt, Alan Mink, William Dorland

Most research regarding quantum adiabatic optimization has focused on stoquastic Hamiltonians, whose ground states can be expressed with only real, nonnegative...

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...

Selecting HVAC Systems to Achieve Comfortable and Cost-effective Residential Net-Zero Energy Buildings

February 15, 2018

Author(s)

Wei Wu, Harrison Skye, Piotr A. Domanski

This study investigated the energy, comfort and economic performance of commercially-available HVAC technologies for a residential net-zero energy building...

Mixed Conductive Soft Solids by Electrostatically Driven Network Formation of a Conjugated Polyelectrolyte

February 15, 2018

Author(s)

Scott P. O. Danielsen, Gabriel E. Sanoja, Samantha R. McCuskey, Boualem Hammouda, Guillermo C. Bazan, Glenn H. Fredrickson, Rachel A. Segalman

The microscopic network structure transitions of a conjugated polyelectrolyte (Poly[2,6-(4,4-bis-potassium butanylsulfonate-4H-cyclopenta-[2,1-b;3,4-b']...

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.

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...

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...

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...

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...

Spontaneous Decay of a Soft Optical Phonon in the Relaxor Ferroelectric PbMg_1/3Nb_2/3O₃

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...

ChebTools: C++11 (and Python) tools for working with Chebyshev expansions

February 12, 2018

Author(s)

Ian H. Bell, Bradley K. Alpert, Lucas Bouck

Intratube Exciton Resonance Raman Signature of Intertube Excitons in Compositionally-Defined Carbon Nanotube Bundles

February 12, 2018

Author(s)

Angela R. Hight Walker, Jeffrey R. Simpson

Electronic interactions in low-dimensional nanomaterial heterostructures can lead to novel optical response arising from exciton delocalization over the...

The NISTmAb Reference Material 8671 Lifecycle Management and Quality Control Strategy

February 12, 2018

Author(s)

John E. Schiel, Abigail Turner

Comprehensive analysis of monoclonal antibody therapeutics involves an ever expanding cadre of technologies. Lifecycle appropriate application of current and...

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...

Effect of Dental Monomers and Initiators on Streptococcus mutans Oral Biofilms

February 11, 2018

Author(s)

Nancy Lin, Sheng Lin-Gibson

Objectives. Resin-based composites are known to elute leachables that include unincorporated starting materials. The objective of this work was to determine the...

Toward Determining Melt Pool Quality Metrics via Coaxial Monitoring in Laser Powder Bed Fusion

February 10, 2018

Author(s)

Brian A. Fisher, Brandon Lane, Ho Yeung, Jack L. Beuth

The current industry trend in metal additive manufacturing is toward greater real time process monitoring capabilities during builds to ensure high quality...

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...

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...

Doping-Induced Redistribution of Magnetic Spectral Weight in the Substituted Hexaborides Ce_1-xLa_xB₆ and Ce_1-xNd_xB₆

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)...