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Displaying 21101 - 21125 of 73830

Performance of BAW Resonators at Cryogenic Temperatures

July 21, 2013
Author(s)
Eduard Rocas, C. Collado, Jordi Mateu, A Hueltes, J. Verdu, Robert Aigner, James Booth
In this work we go beyond the usual temperature range for commercial applications and explore the functioning of Bulk Acoustic Wave (BAW) resonators down to cryogenic temperatures, to get the whole picture at understanding the physical tendency of the main

Dynamic Stress Analysis Applied to (111)-Textured Pt in HClO_(4) Electrolyte

July 20, 2013
Author(s)
Manon C. Lafouresse, Ugo Bertocci, Gery R. Stafford
Dynamic stress analysis (DSA) was performed on Pt cantilever electrodes immersed in a 0.1 mol/L HClO_(4) electrolyte. DSA combines elements of electrochemical impedance spectroscopy (EIS) and cantilever curvature. In this paper DSA is used to determine the

Improving quantitative neutron radiography through image restoration

July 20, 2013
Author(s)
Daniel S. Hussey, Elias M. Baltic, Kevin J. Coakley, David L. Jacobson
This in-situ study examines the water content in polymer electrolyte fuel cells (PEFCs) using neutron radiography. Various conditions such as different polytetraflouroethylene (PTFE) loadings in the gas diffusion media including the micro-porous layer (MPL

Challenges of the Changing Robot Markets

July 19, 2013
Author(s)
Gurvinder S. Virk, Carol Herman, Roger V. Bostelman, Tamas Haidegger
Service robots are becoming an integrated part of daily life, entering even the most complex scenarios, yet at a slower pace than previously anticipated. This paper presents an overview of the changing area of robotics and the new challenges being faced

Digital Signature Standard (DSS)

July 19, 2013
Author(s)
National Institute of Standards and Technology (NIST), Elaine Barker
This Standard specifies a suite of algorithms that can be used to generate a digital signature. Digital signatures are used to detect unauthorized modifications to data and to authenticate the identity of the signatory. In addition, the recipient of signed

Development of a Precision Nanoindentation Platform

July 18, 2013
Author(s)
Douglas T. Smith, Bartosz K. Nowakowski, Robert F. Cook, Stuart T. Smith, Luis F. Correa
This paper presents the design, construction and performance of a surface- referenced nanoindentation instrument termed a precision nanoindentation platform (PNP). The PNP is a symmetrically designed instrument with a centrally located indenter tip

G-band micro-fabricated frequency-steered arrays with 2deg/GHz beam steering

July 17, 2013
Author(s)
Leonardo M. Ranzani, Daniel G. Kuester, Kenneth Vanhille, Anatoliy Boryssenko, Erich N. Grossman, Zoya Popovic
In this paper, we describe micro-fabricated frequency-scanned slot waveguide arrays operating between 130 and 180 GHz for planetary landing radar. The group delay dispersion of the feed line is increased by corrugating the bottom rectangular waveguide wall

Parametric seeding of a microresonator optical frequency comb

July 16, 2013
Author(s)
Scott B. Papp, Pascal P. Del'Haye, Scott A. Diddams
We have investigated parametric seeding of a microresonator frequency comb (microcomb) by way of a pump laser with two intensity modulation sidebands. We show that the pump-sideband spacing is precisely replicated throughout the microcomb's optical

Relationship between CTDI values and measured Peak Skin Dose (PSD)

July 16, 2013
Author(s)
Ronaldo Minniti, Hugo de las Heras Gala, Sean Wilson, Chad Mitchell, Marlene Skopec, Claudia Brunner, Kish Chakrabarti
In this work we relate the CT dose index volume (CTDIvol) readily displayed in all CT units with an actual Peak Skin Dose (PSD) value. Measurements of the CTDI and skin exposure were performed simultaneously using an ionization chamber and radiochromic

3D X-ray Metrology for Block Copolymer Lithography Line-Space Patterns

July 15, 2013
Author(s)
Daniel F. Sunday, Matthew R. Hammond, Chengqing C. Wang, Wen-Li Wu, Regis J. Kline, Gila E. Stein
We report on the development of a new measurement method, resonant critical-dimension small-angle x-ray scattering (CD-SAXS), for the characterization of the buried structure of block copolymers (BCP) used in directed self assembly (DSA). We use resonant

Absolute spectral responsivity measurements of solar cells by a hybrid optical technique

July 15, 2013
Author(s)
Behrang H. Hamadani, John F. Roller, Brian P. Dougherty, Fiona Persaud, Howard W. Yoon
An irradiance mode, absolute differential spectral response measurement system for solar cells is presented. The system is based on combining the monochromator-based approach of determining the power mode spectral responsivity of cells with an LED-based

Characterizing Large-Form-Factor Devices in a Reverberation Chamber

July 15, 2013
Author(s)
Catherine A. Remley, Gerrit S. van de Beek, Christopher L. Holloway, John M. Ladbury
Abstract—With new technologies such as machine-to-machine communications there is a growing need to test large-formfactor devices in reverberation chambers. The performance of the reverberation chamber can be degraded by the physical characteristics of

Energy Price Indices and Discount Factors for Life-Cycle Cost Analysis - 2013

July 15, 2013
Author(s)
Amy S. Rushing, Joshua D. Kneifel, Barbara C. Lippiatt
This is the 2013 edition of energy price indices and discount factors for performing life-cycle cost analyses of energy and water conservation and renewable energy projects in federal facilities. It will be effective from April 1, 2013 to March 31, 2014

ITL Issues Guidelines for Managing the Security of Mobile Devices

July 15, 2013
Author(s)
Elizabeth B. Lennon
This ITL Bulletin announces the publication of NIST Special Publication 800-124 Revision 1, Guidelines for Managing the Security of Movile Devices in the Enterprise. The revised guidelines will assist organizations in managing the security of mobile

Method for Measuring Axis Orthogonality in MEMS Accelerometers

July 15, 2013
Author(s)
Craig D. McGray, Muhammad Y. Afridi, Jon C. Geist
A method is described for the computation of axis orthogonality errors in 3-axis accelerometers, based on the application of gravitational force at known angles. A precision two-axis articulated gimbal system is used to control the angle at which the

Microfluidic Platform for Magnetic Nanoparticle Trapping and Detection

July 15, 2013
Author(s)
Charles A. Little, John Pellegrino, Stephen E. Russek
We evaluate giant magnetoresistance (GMR) sensors to trap and count small concentrations of magnetic nanoparticles (MNPs) within microfluidic flow. The device presented in this paper takes the novel approach of capturing and detecting MNPs utilizing the

Mode reconstruction of a light field by multi-photon statistics

July 15, 2013
Author(s)
Elizabeth A. Goldschmidt, Fabrizio Piacentini, I. Ruo Berchera, Sergey V. Polyakov, Silke Peters, Stefan Kuck, Giorgio Brida, Ivo P. Degiovanni, Alan L. Migdall, Marco Genovese
Knowing the underlying number and structure of occupied modes of a light field plays a crucial role in minimizing loss and decoherence of quantum information. Typically, full characterization of the mode structure involves a series of several separate

Multicomponent Chemical Imaging of Pharmaceutical Solid Dosage Forms with Broadband CARS Microscopy

July 15, 2013
Author(s)
Christopher M. Hartshorn, Marcus T. Cicerone, Young J. Lee, Charles H. Camp, John M. Heddleston, Patrick Marsac, Tim Rhodes, Zhen Liu, Nicole Canfield
We compare broadband coherent anti-Stokes Raman scattering (BCARS) microscopy with spontaneous Raman microscopy for quantitative and qualitative assessment of multicomponent pharmaceuticals. Indomethacin was used as a model active pharmaceutical ingredient
Displaying 21101 - 21125 of 73830
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