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Displaying 11801 - 11825 of 73858

Short-wave infrared compressive imaging of single photons

June 6, 2018

Author(s)

Thomas Gerrits, Daniel Lum, Varun B. Verma, John Howell, Richard P. Mirin, Sae Woo Nam

We present a short-wave infrared (SWIR) single photon camera based on a single superconducting nanowire single photon detector (SNSPD) and compressive imaging. We show SWIR single photon imaging at a megapixel resolution with a low signal-to-background

Amplitude Mode in the Planar Triangular Antiferromagnet Na 0.9 MnO 2

June 5, 2018

Author(s)

Rebecca L. Dally, Yang Zhao, Zhijun Xu, Robin Chisnell, M. B. Stone, Jeffrey W. Lynn, Leon Balents, Stephen D. Wilson

Amplitude modes that arise from continuous symmetry breaking in materials are of broad interest as condensed matter analogs of the Higgs boson in particle physics. These modes reflect an oscillation in the amplitude of a complex order parameter, yet they

Assessing the chemical and colloidal stability of functionalized gold nanoparticles

June 5, 2018

Author(s)

Tae Joon Cho, Vincent A. Hackley

Among the many classes of engineered nanomaterials, gold nanoparticles (GNPs) are one of the most widely studied and utilized nanoscale platforms for biomedical applications including diagnostics, therapeutics, and transfection. This is due in part to

Formal Definition of Edge Computing: An Emphasis on Mobile Cloud and IoT Composition

June 5, 2018

Author(s)

Charif Mahmoudi, Abdella Battou, Fabrice Mourlin

AbstractMobile cloud computing is an emerging area where two trends come together to compose its major pillars. On one hand, the virtualization affecting the data centers hypervisors. On the other hand, devices mobility, especially Smart Phones, which

Large T1 contrast enhancement using superparamagnetic nanoparticles in ultra-low field MRI

June 5, 2018

Author(s)

Xiaolu Yin, Stephen E. Russek, Gary Zabow, Fan Sun, Jeotikanta Mohapatra, Kathryn E. Keenan, Michael A. Boss, Hao Zeng, Sy-Hwang Liou, John M. Moreland

Superparamagnetic iron oxide nanoparticles (SPIONs) are widely investigated and utilized as magnetic resonance imaging (MRI) contrast and therapy agents due to their large magnetic moments. Local field inhomogeneities caused by these high magnetic moments

Reference Correlations for the Viscosity of Ammonia from the Triple Point to 725 K and up to 50 MPa

June 5, 2018

Author(s)

S.A. Monogenidou, Marc J. Assael, Marcia L. Huber

This paper presents new wide-ranging correlations for the viscosity of ammonia based on critically evaluated experimental data. The correlation is designed to be used with a recently developed equation of state, and it is valid from the triple point to 725

Stitching Evaluation Methodology for Sparse Microscopy Images

June 5, 2018

Author(s)

Joe Chalfoun, Michael P. Majurski, Changming Sun, Ching-Wei Wang, Peter Bajcsy, Mary C. Brady

Application of Digital Image Correlation to Structures in Fire

June 4, 2018

Author(s)

Christopher M. Smith, Matthew Hoehler

The behavior of engineering structures in fire is commonly studied through large-scale experiments. However, temperature-varying material properties, spatially-varying thermal loading and complicated structure geometries result in these structures

Combining viscoelastic properties and architecture to control the dynamic response of soft materials

June 4, 2018

Author(s)

Aaron Forster, Michael Riley

Blunt trauma and brain injury can occur during impacts at energies and velocities below those observed in ballistic and blast events. During low to medium velocity impacts, the shell prevents helps to prevent bone fractures and the padding helps limit the

Demonstration of a Chamber for Strain Mapping of Steel Specimens Under Mechanical Load in a Hydrogen Environment by Synchrotron Radiation

June 4, 2018

Author(s)

Matthew J. Connolly, Peter E. Bradley, Damian S. Lauria, Andrew J. Slifka, Elizabeth S. Drexler

We present a demonstration of a chamber for diffraction measurements of lattice strain for specimens in hydrogen gas under mechanical load. The chamber is suitable for static and cyclic mechanical loading. Synchrotron x-ray radiographs of a fatigue crack

Distributed Algorithm for Suppressing Epidemic Spread in Networks

June 4, 2018

Author(s)

Van Sy Mai, Abdella Battou, Kevin L. Mills

This paper considers problems related to suppressing epidemic spread over networks given limited curing resources. The spreading dynamic is captured by a susceptible-infected- susceptible model. The epidemic threshold and recovery speed are determined by

Multiscale characterization of time dependent properties of carbon nanotube grafted fiber-reinforced polymer composites

June 4, 2018

Author(s)

Ajay Krishnamurthy, Ran Tao, Erkan N. Senses, Sagar Doshi, Erik Thostenson, Antonio Faraone, Aaron Forster

Octave-spanning dual frequency comb spectroscopy in the molecular fingerprint region

June 4, 2018

Author(s)

Henry R. Timmers, Abijith S. Kowligy, Alexander J. Lind, Flavio Caldas da Cruz, Nima Nader, Myles C. Silfies, Thomas K. Allison, Gabriel G. Ycas, Peter G. Schunemann, Scott B. Papp, Scott A. Diddams

Spectroscopy in the molecular fingerprint spectral region (6.5-20 $\mu$m) yields critical information on material structure for physical, chemical and biological sciences. Despite decades of effort, this portion of the electromagnetic spectrum remains

A SILICON OPTOMECHANICAL ACCELEROMETER WITH HIGH BANDWIDTH AND SENSITIVITY

June 3, 2018

Author(s)

Yiliang Bao, Feng Zhou, Thomas W. LeBrun, Jason J. Gorman

IMAGING GIGAHERTZ DYNAMICS IN MICROMECHANICAL RESONATORS USING ULTRAFAST PULSED LASER INTERFEROMETRY

June 3, 2018

Author(s)

Lei Shao, Vikrant J. Gokhale, Justin Kuo, Amit Lal, Jason J. Gorman

Thermodynamic properties of 2 methylindole: experimental and computational results for gas-phase entropy and enthalpy of formation

June 3, 2018

Author(s)

Robert D. Chirico, Yauheni Paulechka, Ala Bazyleva, Andrei F. Kazakov

Measurements leading to the calculation of thermodynamic properties in the ideal-gas state for 2-methylindole (Chemical Abstracts registry number [95-20-5]) are reported. Experimental methods were adiabatic heat-capacity calorimetry, differential scanning

Long-Term Ceramic Reliability Analysis including the Crack-Velocity Threshold and the "Bathtub" Curve

June 2, 2018

Author(s)

Robert F. Cook

A thermally-activated crack-velocity formulation that includes a threshold at thermodynamic equilibrium is used in the prediction of long-term time-to-failure for brittle materials. A closed-form solution is derived for straight cracks propagating under

Optomechanical transducer-based soft and high frequency nanoscale cantilever for atomic force microscopy

June 2, 2018

Author(s)

Sang M. An, Jie Zou, Glenn Holland, Jungseok Chae, Andrea Centrone, Vladimir Aksyuk

We introduce an optomechanical transducer-based nanoscale cantilever for atomic force microscope (AFM). The high optical quality factor of the microdisk resonator enables detection of the nanoscale cantilever motion with high sensitivity. A low stiffness

PROGRESS AND CHALLENGES IN MODELING COMMUNITY RESILIENCE: AN UPDATE ON THE CENTER FOR RISK-BASED COMMUNITY RESILIENCE PLANNING

June 2, 2018

Author(s)

John W. van de Lindt, Bruce Ellingwood, Therese P. McAllister, Paolo Gardoni, Daniel Cox

The resilience of urban communities has garnered significant attention in industry, government, and academic research over the last decade. Recent events such as Hurricane Katrina in 2005, the 2011 Christchurch, New Zealand earthquake, the 2011 Great

An update on dose calibrator settings for nuclides used in nuclear medicine

June 1, 2018

Author(s)

Denis E. Bergeron, Jeffrey T. Cessna

Most clinical measurements of radioactivity, whether for therapeutic or imaging nuclides, rely on commercial reentrant ionization chambers (dose calibrators). The National Institute of Standards and Technology (NIST) maintains a battery of representative

Assessing security requirements for controlled unclassified information:

June 1, 2018

Author(s)

Ross Ron, Demspey Kelley, Pilliterri Victoria

Assessing the chemical and colloidal stability of functionalized gold nanoparticles:

June 1, 2018

Author(s)

Tae Joon Cho, Vincent A. Hackley

Collapse Prevention Seismic Performance Assessment of New Buckling-Restrained Braced Frames using ASCE 41

June 1, 2018

Author(s)

Matthew S. Speicher, John L. Harris

This paper presents the results of a seismic performance assessment using ASCE 41-06 for six buckling-restrained braced frames (BRBFs) designed in accordance with the 2012 International Building Code. The correlation between ASCE 7-10 and ASCE 41-06 is

Comparison of Neutronics Performance Characteristics of the Proposed NIST Reactor with Different LEU Fuels

June 1, 2018

Author(s)

Danyal J Turkoglu, Zeyun Wu, Robert E. Williams, Thomas Henderson Newton

A conceptual design of a new reactor with a horizontally-split core using low-enriched uranium silicide dispersion (U 3Si 2/Al) fuel has recently been studied as a potential replacement for the National Bureau of Standards Reactor (NBSR). In this paper

DETECTORS FOR LIQUID CHROMATOGRAPHY

June 1, 2018

Author(s)

Thomas J. Bruno, Paris D. Svoronos

The following table provides some comparative data for interpretation of results from the more common detectors applied to high-performance liquid chromatography1-6. In general, the operational parameters provided are for optimized systems, and represent

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