Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Journals

Educational commitment and social networking: The power of informal networks

May 29, 2018

Author(s)

Justyna Zwolak, Michael P. Zwolak, Eric Brewe

Prior studies found that the lack of an engaging pedagogy and the highly competitive atmosphere in introductory science courses tend to discourage students from...

Bang-bang shortcut to adiabaticity in the Dicke model as realized in a Penning trap experiment

May 29, 2018

Author(s)

J. Cohn, Arghavan Safari-Naini, R. J. Lewis-Swan, Justin G. Bohnet, M. Garttner, Kevin Gilmore, Elena Jordan, Ana Maria Rey, John Bollinger, James K. Freericks

We introduce a bang-bang shortcut to adiabaticity for the Dicke model, which we implement via a two-dimensional array of trapped ions in a Penning trap with a...

Equilibrium Free Energies from Non-Equilibrium Trajectories with Relaxation Fluctuation Spectroscopy

May 28, 2018

Author(s)

David J. Ross, Elizabeth A. Strychalski, Christopher Jarzynski, Samuel M. Stavis

Recent advances in non-equilibrium statistical mechanics and single-molecule measurements have enabled the determination of equilibrium free energies from non...

High efficiency generation of THz from 1550-nm: exceeding the Manley-Rowe limit with photoconductive emitters

May 28, 2018

Author(s)

A Feldman, Todd E. Harvey, Richard Mirin, A. Mingardi, W-D. Zhang, E. R. Brown

Two photoconductive emitters - one with a self-complementary square spiral antenna, and the other with a resonant slot antenna - were fabricated on a GaAs...

An Experimental and Computational Study of CO₂ Adsorption in the Sodalite-Type M-BTT (M = Cr, Mn, Fe, Cu) Metal-Organic Frameworks Featuring Open Metal Sites

May 28, 2018

Author(s)

Mehrdad Asgari, Sudi Jawahery, Eric D. Bloch, Matthew R. Hudson, Roxana Flacau, Bess Vlaisavljevich, Jeffrey R. Long, Craig Brown, Wendy L. Queen

We present a comprehensive investigation of the CO 2 adsorption properties of the isostructural series of metal-organic frameworks M-BTT (M =Cr, Mn, Fe, Cu, BTT...

What Causes the Anomalous Aggregation in Pluronic Aqueous Solutions?

May 28, 2018

Author(s)

Kuo-Chih Shih, Zhiqiang Shen, Ying Li, Martin Kroger, Shing-Yun Chang, Yun Liu, Mu-Ping Nieh, Hsi-Mei Lai

Pluronic (PL) block copolymers has been widely used as delivery carriers, molecular templates for porous media, process additive of affecting rheological...

Metrology for stable isotope reference materials: 13C/12C and 18O/16O isotope ratio value assignment of pure carbon dioxide gas samples on the Vienna PeeDee Belmnite-CO2 scale using dual-inlet mass spectrometry

May 25, 2018

Author(s)

Abneesh Srivastava, R M. Verkouteren

Isotope ratio measurements have been conducted on a series of isotopically distinct pure CO2 gas samples using the technique of dual-inlet isotope ratio mass...

Standardization of 64Cu activity

May 25, 2018

Author(s)

Denis E. Bergeron, Jeffrey T. Cessna, Ryan P. Fitzgerald, Leticia S. Pibida, Brian E. Zimmerman

The complex decay scheme that makes 64Cu promising as both an imaging and therapeutic agent in medicine also makes the absolute measurement of its activity...

A trapped human PPM1A-phosphopeptide complex reveals structural features critical for regulation of PPM protein phosphatase activity

May 24, 2018

Author(s)

Subrata Debnath, Dalibor Kosek, Harichandra Tagad, Stewart R. Durell, Daniel Appella, Roderico Acevedo, Alexander Grishaev, Fred Dyda, Ettore Appella, Sharlyn Mazur

Metal-dependent protein phosphatases (PPM) are evolutionarily unrelated to other serine/threonine protein phosphatases and are characterized by their...

Poroelastic Fracture Transition of a Biopolymer Gel

May 24, 2018

Author(s)

Edwin P. Chan, Bradley R. Frieberg, Ronald L. Jones, Ray-Shimry Garatsa, John Bachert, Benjamin Crawshaw

Controlling the fracture behavior of thermoreversible biopolymer gels is important in many con- sumer based applications. For example, gelatin gels are used in...

Determination of Hexavalent Chromium Fractions in Plastics Using Laboratory-Based, High- Resolution X Ray Emission Spectroscopy

May 24, 2018

Author(s)

Evan P. Jahrman, Gerald Seidler, John R. Sieber

Cr(VI) is a well-known human carcinogen with many water-soluble moieties. Its presence in both natural and man-made substances poses a risk to public health...

Generalized auto-balanced Ramsey spectroscopy of clock transitions

May 23, 2018

Author(s)

V. I. Yudin, A. V. Taichenachev, M. Y. Basalaev, T. Zanon-Willette, Juniper Wren Y. Pollock, Moshe Shuker, Elizabeth Donley, John Kitching

We develop the theory for generalised auto-balanced Ramsey spectroscopy (GABRS), which allows probe-field-induced shifts in atomic clocks to be eliminated. This...

Absence of diffuse double layer effect on the vibrational properties and oxidation of chemisorbed carbon monoxide on a Pt(111) electrode

May 23, 2018

Author(s)

Marta C. Figueiredo, Dennis Hiltrop, Ravishankar Sundararaman, Kathleen Schwarz, Marc Koper

In this work we investigate the effects of the diffuse double layer thickness on the electrochemical Stark tuning and oxidation of carbon monoxide at Pt(111)...

Revision of the ionization energy of neutral carbon

May 22, 2018

Author(s)

W L. Glab, Haris Kunari, Alexander Kramida

This publication describes a re-analysis of previously published data on neutral carbon (C I) utilizing critically examined and improved values for the line...

Current State of the Art in Small Mass and Force Metrology Within the International System of Units

May 22, 2018

Author(s)

Gordon Shaw

This review article summarizes new scientific trends in research for metrology of small mass (1 milligram and lower) and small force (10 micronewtons and lower)...

Structure and Dynamics of a Graphene Melt

May 22, 2018

Author(s)

Jack F. Douglas, Sinan Keten, Fernando Vargas-Lara, Wenjie Xia

We show by molecular dynamics simulation that bulk materials composed of graphene nanosheets exhibit fluid-like properties similar to linear polymer melts at...

Emerging investigators in materials science 2017-2018

May 21, 2018

Author(s)

Frank W. DelRio, Robert Riggleman

Materials Research Express is a multidisciplinary journal devoted to publishing cutting-edge experimental and theoretical research on the processing, structure...

Exceptionally reliable density solving algorithms for multiparameter mixture models from Chebyshev expansion rootfinding

May 21, 2018

Author(s)

Ian H. Bell, Bradley K. Alpert

Calculation of the density of a mixture for a given tem- perature, pressure, and mixture composition from multi- parameter mixture models (like the so-called...

Development of Ferrite-Based Temperature-Contrast Agents for Magnetic Resonance Imaging: Study of Cu1-xZnxFe2O4

May 21, 2018

Author(s)

Noweir Alghamdi, Janusz H. Hankiewicz, Nick Anderson, Karl Stupic, Marek Przybylski, Jan Zukrowski, Zbigniew Celinski, Robert E. Camley

We have investigated the use of Cu1-xZnxFe2O4 ferrites (0.60

Superconducting optoelectronic networks V: networks and scaling

May 17, 2018

Author(s)

Jeffrey M. Shainline, Jeffrey T. Chiles, Sonia M. Buckley, Adam N. McCaughan, Richard P. Mirin, Sae Woo Nam

Networks of superconducting optoelectronic neurons are investigated for their near-term technological potential and long-term physical limitations. Networks...

Predicting structural properties of fluids by thermodynamic extrapolation

May 16, 2018

Author(s)

Nathan Mahynski, Sally Jiao, Harold W. Hatch, Marco A. Blanco Medina, Vincent K. Shen

We describe a methodology for extrapolating the structural properties of multicomponent fluids from one thermodynamic state to another. These properties...

Richard Niessner and Andreas Schäffer: Organic Trace Analysis

May 16, 2018

Author(s)

Melissa M. Phillips

None

Controlling Pore Shape and Size of Interpenetrated Anion-Pillared Ultramicroporous Materials Enables Molecular Sieving of CO₂ Combined with Ultrahigh Uptake Capacity

May 16, 2018

Author(s)

Mengdie Jiang, Bin Li, Xili Cui, Qiwei Yang, Zongbi Bao, Yiwen Yang, Hui Wu, Wei Zhou, Banglin Chen, Huabin Xing

The separation of carbon dioxide (CO 2) from hydrocarbons is a critical process for the production of clean energy and high-purity chemicals. Adsorption based...

Superconformal Nickel Deposition in Through Silicon Vias: Experiment and Prediction

May 16, 2018

Author(s)

Trevor Braun, Daniel Josell, Thomas P. Moffat, Hyo Jong Lee, SH Kim

This work examines the filling of Through Silicon Vias (TSV) by Ni deposition from a NiSO4 + NiCl2 + H3BO3 electrolyte containing a branched polyethyleneimine...

Effect of Pipe Flattening in API X65 Linepipe Steels Having Bainite vs. Ferrite/Pearlite Microstructures

May 15, 2018

Author(s)

Timothy Weeks, Singon Kang, John Speer, Chester Van Tyne

Simulating the fire-thermal-structural behavior in a localized fire test on a bare steel beam

May 15, 2018

Author(s)

Chao Zhang, Lisa Y. Choe, John L. Gross

The engineering design practice may include fire protection design of steel structures in large volumes. Prescriptive methods in fire codes are based on the...

Multi-Job Production Systems: Definition, Problems, Analysis, and Product-Mix Performance Portrait of Serial Lines

May 15, 2018

Author(s)

Peter O. Denno, Pooya Alvian

Multi-job production (MJP) is a class of flexible manufacturing systems intended to produce different products (job-types) according to a given product-mix and...

Anomalous Supercurrent Modulation in Josephson Junctions With Ni-Based Barriers

May 15, 2018

Author(s)

Burm Baek, Michael L. Schneider, Matthew R. Pufall, William H. Rippard

We investigate the supercurrent transport characteristics of Ni-barrier Josephson junctions with various barrier multilayer structures. Our device fabrication...

A Data Clustering Technique for Fault Detection and Diagnostics in Field-Assembled Air Conditioners

May 14, 2018

Author(s)

William V. Payne, Piotr A. Domanski, Jaehyeok Heo

Fault Detection and Diagnostics (FDD) can be used to commission and maintain the performance of residential style, split-system, air conditioners and heat pumps...

Testing the image quality of cabinet x-ray systems for security screening: the revised ASTM F792 standard

May 14, 2018

Author(s)

Jack L. Glover, Ronald E. Tosh, Lawrence T. Hudson, Nicholas G. Paulter Jr.

Was this page helpful?