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Search Publications

NIST Authors in Bold

Displaying 16876 - 16900 of 73963

Synchrotron X-ray Investigation of alpha-Chlorohemin, C34H32ClFeN4O4, an Fe-porphyrin

January 28, 2016
Author(s)
Winnie K. Wong-Ng, James A. Kaduk, Lawrence P. Cook, B Chakraborty, Greg Brewer
X-ray data of a powder sample of alpha-chlorohemin (a member of the porphyrin family), C34H32ClFeN4O4, was collected using synchrotron radiation at the Advanced Photon Source (APS, Argonne National Laboratory). Rietveld Refinement and Density Functional

Demonstration of near-IR line-referenced electro-optical laser comb for precision radial velocity measurement in astronomy

January 27, 2016
Author(s)
Scott A. Diddams, K Vahala, J Li, Gabriel G. Ycas, P Plavchan, S Leifer, J Sandhu, G Vasisht, P Chen, P Gao, J Gagne, M Bottom, E.C. Martin, M.P. Fitzgerald, G Doppmann, C Beichman, X Yi
We describe a successful effort to produce a laser comb around 1.55 micron in the astronomical H band (1.5-1.8 micron) using a method based on a line-referenced, electro-optical-modulation frequency comb (LR-EOFC). The LR-EOFC is a spectrum of equally

High-contrast and fast electrochromic switching enabled by plasmonics

January 27, 2016
Author(s)
Ting Xu, Erich C. Walter, Amit Agrawal, Christopher C. Bohn, Jeyavel Velmurugan, Wenqi Zhu, Henri Lezec, Albert A. Talin
With vibrant colours and simple, room-temperature processing methods, electrochromic polymers have attracted attention as active materials for flexible, low-power-consuming devices. However, slow switching speeds in devices realized to date, as well as the

Handheld Real-Time PCR Device

January 26, 2016
Author(s)
Christian D. Ahrberg, Robert Ilic, Andreas Manz, Pavel Neu?il
Here we report one of the smallest real-time PCR system up to date with approximate size of 100 mm × 60 mm × 33 mm. The system is an autonomous unit requiring an external 12 V power supply. Four simultaneous reactions are performed in form of virtual

Mechanically mediated microwave frequency conversion

January 26, 2016
Author(s)
Florent Q. Lecocq, Jeremy B. Clark, Raymond W. Simmonds, Jose A. Aumentado, John D. Teufel
We report the observation of efficient and low-noise frequency conversion between two microwave modes, mediated by the motion of a mechanical resonator subjected to radiation pressure. We achieve the coherent conversion of more than 10^{12} photons/s with

Modulating the Electrical Conductivity of Metal-Organic Framework Films with Intercalated Guest P-Systems

January 26, 2016
Author(s)
Zhiyong Guo, Dillip K. Panda, Krishnendu Maity, David Lindsey, T. Gannon Parker, Thomas E. Albrecht-Schmitt, Jorge L. Barreda-Esparza, Peng Xiong, Wei Zhou, Sourav Saha
The access to electroactive metal-organic frameworks (MOFs) and the ability to manipulate their electrical conductivity with external stimuli are vital for the realization of MOF-based sensors and electronic devices. A blue-colored electroactive MOF (BMOF)

Toward Autonomous Mobile Sensor Networks Technology

January 26, 2016
Author(s)
Kamran Sayrafian, Hamid Mahboubi, Amir G. Aghdam
Mobile sensor networking technology has attracted considerable attention in various research communities in recent years due to their widespread applications in civilian and military environments. One objective when using mobile sensors is to obtain

GPS Jamming and GPS Carrier-Phase Time Transfer

January 25, 2016
Author(s)
Jian Yao, Marc A. Weiss, Charles Curry, Judah Levine
This paper studies the impact of GPS jamming on GPS carrier-phase time transfer. To study this issue, at NIST, we have installed a commercial GPS jamming detector since 2014 April. During 2014 April – 2015 April, the detector detected more than 100 jamming

Lateral Tip Control Effects in CD-AFM Metrology: The Large Tip Limit

January 25, 2016
Author(s)
Ronald G. Dixson, Ndubuisi G. Orji, Ryan Goldband
Sidewall sensing in CD-AFMs usually involves continuous lateral dithering of the tip or the use of a control algorithm and fast response piezo actuator to position the tip in a manner that resembles touch-triggering of coordinate measuring machine (CMM)

Evaluation of microbial qPCR workflows using engineered Saccharomyces cerevisiae

January 24, 2016
Author(s)
Sandra M. Da Silva, Lindsay Harris, Nathanael David Olson, Steven Lund, Autumn S. Downey, Zvi Kelman, Marc L. Salit, Jayne D. Morrow
Aims: We describe the development and interlaboratory study of modified Saccharomyces cerevisiae as a candidate material to evaluate a full detection workflow including DNA extraction and quantitative polymerase chain reaction (qPCR). Methods and results

Performance Evaluation of Human Detection Systems for Robot Safety

January 22, 2016
Author(s)
William P. Shackleford, Geraldine Cheok, Tsai H. Hong, Kamel Saidi, Michael O. Shneier
Detecting and tracking people is becoming more important in robotic applications because of the increasing demand for collaborative work in which people interact closely with and in the same workspace as robots. New safety standards allow people to work

Concentric transmon qubit featuring fast tunability and an anisotropic magnetic dipole moment

January 21, 2016
Author(s)
Jochen Braumuller, Martin O. Sandberg, Michael Vissers, Andre Schneider, Steffen Schlor, Lukas Grunhaupt, Hannes Rotzinger, Michael Marthaler, Alexander Lukashenko, Amadeus Dieter, Alexey V. Ustinov, Martin Weides, David P. Pappas
We present a planar qubit design based on a superconducting circuit that we call concentric transmon. While employing a straightforward fabrication process using Al evaporation and lift-off lithography, we observe qubit lifetimes and coherence times in the

Effect of Hierarchical Cluster Formation on the Viscosity of Concentrated Monoclonal Antibody Formulations Studied by Neutron Scattering

January 21, 2016
Author(s)
P. Douglas Godfrin, Isidro E. Zarraga, Jonathan Zarzar, Lionel Porcar, Peter Falus, Norman J. Wagner, Yun Liu
Recently, reversible cluster formation has been identified as an underlying cause of anomalously large solution viscosities observed in some concentrated monoclonal antibody (mAb) formulations. As high solution viscosity prevents the use of subcutaneous

Experimental demonstration of deep frequency modulation interferometry

January 21, 2016
Author(s)
Katharina-Sofie Isleif, Oliver Gerberding, Thomas Schwarze, Moritz Mehmet, Gerhard Heinzel, Felipe Guzman
Experiments for space and ground-based gravitational wave detectors often require large dynamic range interferometric position readout of test masses with 1 pm/√Hz precision over long time scales. Heterodyne interferometer schemes that achieve such
Displaying 16876 - 16900 of 73963
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