Journals

X-Ray microbeam diffraction study of long-range internal stresses in equal-channel angular pressed aluminum

November 1, 2013

Author(s)

Lyle E. Levine, I-Fang Lee, Thien Phan, Jonathan Z. Tischler, Peter Geantil, Yi Huang, Terrance G. Langdon, Michael E. Kassner

Aluminum alloy 1050 was processed by equal-channel angular pressing (ECAP) using a single pass (equivalent uniaxial strain of about 0.88). Long-range internal...

Statistical representation of design parameters for hurricane risk reduction structures

November 1, 2013

Author(s)

Christopher L. Dunn, Friedland J. Carol, Marc Levitan

This paper presents the results of a review of the state-of-the-art for characterizing the uncertainty in geotechnical, structural, and hydraulic variables...

Airbrushed Nanofiber Scaffolds Support Bone Marrow Stromal Cell Differentiation

November 1, 2013

Author(s)

Carl G. Simon Jr., Wojtek J. Tutak, Sumona Sarkar, Tanya M. Farooque, Jyotsnendu J. Giri, Dongbo Wang, Sheng Lin-Gibson, Joachim Kohn, Durgadas Bolikal

Nanofiber scaffolds are effective for tissue engineering since they emulate the fibrous nanostructure of native extracellular matrix (ECM). Although...

High-resolution K-shell spectra from laser excited molybdenum plasma

November 1, 2013

Author(s)

Lawrence T. Hudson, C.I Szabo, P Indelicatio, John F. Seely, T Ma

X-ray spectra from Molybdenum plasmas were recorded by a Cauchois-type cylindrically bent Transmission Crystal Spectrometer (TCS). The absolutely calibrated...

Analysis of Contact Interfaces for Single GaN Nanowire Devices

November 1, 2013

Author(s)

Andrew M. Herrero, Paul T. Blanchard, Kristine A. Bertness

Single GaN nanowire (NW) devices fabricated on SiO 2 can exhibit a strong degradation after annealing due to the occurrence of void formation at the contact/SiO...

Cold-atom double-lambda coherent population trapping clock

October 31, 2013

Author(s)

Elizabeth A. Donley, Francois-Xavier R. Esnault, Eric M. Blanshan, Eugene N. Ivanov, Robert E. Scholten, John E. Kitching

Miniature atomic clocks based on coherent population trapping (CPT) states in thermal atoms are emerging as an important component in many field applications...

Considerations for choosing and using force fields and interatomic potentials in materials science and engineering

October 31, 2013

Author(s)

Chandler A. Becker, Francesca M. Tavazza, Zachary T. Trautt, Robert A. Buarque de Macedo

Atomistic simulations are increasingly important in scientific and engineering application. However, the chosen potential affects the simulation answer...

Stair evacuation of older adults and people with mobility impairments

October 31, 2013

Author(s)

Erica D. Kuligowski, Richard D. Peacock, Emily Wiess, Bryan Hoskins

Engineers analyze occupant movement data for the safety and protection of a population during emergency building evacuations. Quantifiable variables, such as...

Flexible retrospective phase stepping in x-ray scatter correction and phase contrast imaging using structured illumination

October 31, 2013

Author(s)

Han Wen, Houxun Miao, Eric E. Bennett, Nicholas M. Adamo, Lei Chen

An efficient class of x-ray phase contrast imaging and scatter correction methods share the idea of using structured illumination in the form of a periodic...

Fluctuation Enhanced Sensing (FES) with a Nanostructured Semiconducting Metal Oxide Film for Gas Detection and Classification

October 31, 2013

Author(s)

Bulent Ayhan, Chiman Kwan, Jin Zhou, Laszlo Kish, Kurt D. Benkstein, Phillip H. Rogers, Stephen Semancik

The feasibility of fluctuation-enhanced sensing (FES) for the detection and classification of different gases by using a single microsensor has been...

Suppression of Directional Light-Wave Mixing in Normal and Quantum Gases

October 30, 2013

Author(s)

Lu Deng, Chengjie Zhu, Edward W. Hagley, W R. Garrett

We discuss nonlinear optical processes in the presence of quantum gases. We show that in contrast to a normal gas where the medium passively participates in...

An accelerated exposure and testing apparatus for building joint sealants

October 30, 2013

Author(s)

Christopher C. White, Donald L. Hunston, Kar T. Tan, John W. Hettenhouser, Jason D. Garver

The design, fabrication and implementation of a computer-controlled exposure and testing apparatus for building joint sealants are described in this paper. This...

Time Required to Injection-Lock Spin Torque Nanoscale Oscillators

October 29, 2013

Author(s)

William H. Rippard, Matthew R. Pufall, Anthony B. Kos

We have injection-locked a spin-transfer oscillator to a second-harmonic electrical input signal and measured the relative phase and amplitude of the device...

Multi-Walled Carbon Nanotube Layer-by-Layer Coatings With a Novel Trilayer Structure to Reduce Foam Flammability

October 29, 2013

Author(s)

Rick D. Davis, Yeon S. Kim, Amanda A. Cain, Jaime C. Grunlan

The research presented here is the first report of fabricating multi-walled carbon nanotube (MWCNT) based thin coatings on polyurethane foam (PUF) using Layer...

Elasticity and rigidity percolation in networks of type-purified single-wall carbon nanotubes on flexible substrates

October 29, 2013

Author(s)

John M. Harris, JiYeon Huh, Matthew R. Semler, Christopher Stafford, Steven Hudson, Jeffrey Fagan, Erik K. Hobbie

Wrinkles and folds in compressed thin films of type-purified single-wall carbon nanotubes (SWCNTs) on polydimethylsiloxane (PDMS) substrates are used to study...

Measurement of Uncertainty in Orientation Distribution Function (ODF) Calculations

October 28, 2013

Author(s)

Adam A. Creuziger, Komal Syed, Thomas H. Gnaeupel-Herold

Achieving Climate Change Absolute Accuracy in Orbit

October 28, 2013

Author(s)

Bruce Wielicki, Joseph P. Rice

The Climate Absolute Radiance and Refractivity Observatory (CLARREO) mission will provide a metrology laboratory in orbit for the purpose of accurately...

On the calibration of sensor arrays for pattern recognition using the minimal number of experiments

October 26, 2013

Author(s)

Alexander (. Vergara Tinoco, Rodriguez-Lujan Irene, Huerta Ramon, Fonollosa Jordi, Margie Homer

We investigate optimal experiment selection to train a classi er on gas sensor arrays to get the maximal possible performance in a limited number of experiments...

A thermodynamic analysis of refrigerants: Possibilities and tradeoffs for Low-GWP refrigerants

October 26, 2013

Author(s)

Mark O. McLinden, Andrei F. Kazakov, J. Steven Brown, Piotr A. Domanski, Jae H. Heo

We explore the possibilities for refrigerants having low global warming potential (GWP) using two distinct, but complimentary, approaches. We evaluate the...

Connection between thermodynamics and dynamics of simple fluids in highly attractive pores

October 25, 2013

Author(s)

William P. Krekelberg, Vincent K. Shen, Daniel W. Siderius, Thomas M. Truskett, Jeffrey R. Errington

We investigate the structural and diffusive dynamics properties of a model fluid in highly-absorptive cylindrical pores. At subcritical temperatures, self...

Three-dimensional deep sub-wavelength defect detection using (lambda) = 193 nm optical microscopy

October 25, 2013

Author(s)

Bryan M. Barnes, Martin Y. Sohn, Francois R. Goasmat, Hui Zhou, Andras Vladar, Richard M. Silver, Abraham Arceo

Identifying defects in photolithographic patterning is a persistent challenge in semiconductor manufacturing. Well-established optical methods in current use...

Morphing Metal-Polymer Janus Particles

October 25, 2013

Author(s)

Lewis M. Cox, Jason Killgore, Zhengwei Li, Zheng Zhang, Donna C. Hurley, Jianliang Xiao, Yifu Ding

Shape memory polymers have the unique ability to memorize and recover their permanent shapes after being programmed to hold high strain levels up to a few...

A THERMODYNAMIC ANALYSIS OF REFRIGERANTS: PERFORMANCE LIMITS OF THE VAPOR COMPRESSION CYCLE

October 24, 2013

Author(s)

Piotr A. Domanski, J S. Brown, Janusz Wojtusiak, Mark O. McLinden

This paper explores the thermodynamic performance limits of the vapor compression cycle. In particular, we apply evolutionary algorithms to explore the...

A versatile bilayer resist for laser lithography at 405 nm on glass substrates

October 23, 2013

Author(s)

Quandou (. Wang, Ulf Griesmann

We describe a simple bilayer photoresist that is particularly well suited for laser lithography at an exposure wavelength of 405 nm on glass substrates, which...

Exploiting dimensionality and defect mitigation to create tunable microwave dielectrics

October 23, 2013

Author(s)

Nathan D. Orloff, C H. Lee, T Birol, J A. Mundy, V. Goian, R. Haislmaier, E. Vlahos, Y. Kim, J. D. Brock, Y Zhu, R. Uecker, V. Gopalan, S. Kamba, X X. Xi, D A. Muller, I. Takeuchi, James C. Booth, C. J. Fennie

The miniaturization and integration of frequency-agile microwave circuitstunable filters, resonators, phase shifters and morewith microelectronics offers...

Spectral line shapes investigation with Pound-Drever-Hall-locked frequency-stabilized cavity ring-down spectroscopy

October 23, 2013

Author(s)

A. Cygan, S. Wojtewicz, J. Domyslawska, Piotr Maslowski, Katarzyna E. Bielska, M. Piwinski, K. Stec, R.S. Trawinski, F Ozimek, C. Radzewicz, Hisashi Abe, T. Ido, Joseph T. Hodges, D Lisak, R. Ciurylo

A review of recent experiments involving a newly developed Pound-Drever-Hall-locked frequency-stabilized cavity ring-down spectroscopy (PDH-locked FS-CRDS)...

Laser and Photonic Systems Integration: Emerging Innovations and Framework for Research and Education

October 23, 2013

Author(s)

Shimon Y. Nof, Gary J. Cheng, Andrew M. Weiner, Xin W. Chen, Yung C. Shin, Avital Bechar, Claude B. Reed, Alkan Donmez, Thomas D. Weldon, Peter Bermel, Satish T. Bukkapatnam, Changquing Cheng, Soundar R. Kumara, Arden Bement, Richard Koubek, Bopaya Bidanda, Agostino Capponi, Seokcheon Lee, Mark R. Lehto, Andrew L. Liu, Omid Nohadani, Marcos Dantus, Peter W. Lorraine, David D. Notle, Robert W. Proctor, Harshad P. Sardesai, Leyuan Shi, Juan P. Wachs, Xi-Cheng Zhang

The purpose of this white paper is to review the key emerging innovations in laser and photonics systems, their design and integration, focusing on challenges...

Metabolite Profiling of a NIST Standard Reference Material for Human Plasma (SRM 1950) GC/MS, LC/MS, NMR and Clinical Laboratory Analyses, Libraries and Web-based resources

October 22, 2013

Author(s)

Yamil Simon, Mark S. Lowenthal, Lisa E. Kilpatrick, Maureen L. Sampson, Kelly H. Telu, Paul A. Rudnick, William G. Mallard, Daniel W. Bearden, Tracey B. Schock, Dmitrii V. Tchekhovskoi, Niksa Blonder, Xinjian Yan, Yuxue Liang, Yufang Zheng, William E. Wallace, Pedatsur Neta, Karen W. Phinney, Alan T. Remaley, Stephen E. Stein

Recent progress in metabolomics and the development of increasingly sensitive analytical techniques have renewed interest in global profiling, i.e., semi...

FATIGUE CRACK GROWTH OF TWO PIPELINE STEELS IN A PRESSURIZED HYDROGEN ENVIRONMENT

October 22, 2013

Author(s)

Andrew J. Slifka, Elizabeth S. Drexler, Nicholas Nanninga, Yaakov Levy, Joseph D. McColskey, Robert L. Amaro

Fatigue crack growth tests were conducted on two pipeline steel alloys, API 5L X52 and X100. Baseline tests were conducted in air, and those results were...

Optical cloaking using alternate Raman gain and free-space media in the presence of spatially distributed pump fields

October 22, 2013

Author(s)

Chengjie Zhu, Lu Deng, Edward W. Hagley, Mo-Lin Ge

We discuss an optical "cloaking" scheme using three-level active Raman gain media in tandem in the presence of a spatially distributed pump field. Using eikonal...