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NIST Authors in Bold

Displaying 22326 - 22350 of 73929

Uncertainty Budget for the NIST Hybrid Humidity Generator

December 1, 2012
Author(s)
Christopher W. Meyer, W Wyatt Miller, Dean C. Ripple, Gregory E. Scace
We provide here a detailed uncertainty budget for the new Hybrid Humidity Generator (HHG) that has been constructed at the National Institute of Standards and Technology (NIST). The HHG generates frost/dew points from –70 °C to +85 °C using calibration gas

Weak value thermostat with 0.2 mK precision

December 1, 2012
Author(s)
Patrick F. Egan, Jack A. Stone Jr.
A new laser-based thermostat sensitive to 0.2 mK at room temperature is reported. The method utilizes a fluid-filled prism and interferometric weak value amplification to sense nanoradian deviations of a laser beam: due to the high thermooptic coefficient

A Humidity Generator for Temperatures to 200 degC and Pressures to 1.6 MPa

November 30, 2012
Author(s)
D Vega-Maza, W. Wyatt Miller, Dean C. Ripple, Gregory E. Scace
We have constructed a new humidity generator that produces gas streams of known moisture content at temperatures from 85 °C to 200 °C, absolute pressures from 0.2 MPa to 1.6 MPa, and relative humidities from 10 % to 90 %. The generator produces a moist gas

Phase-Noise Measurement System for the Terahertz-Band

November 30, 2012
Author(s)
Jason A. DeSalvo, Archita Hati, Craig W. Nelson, David A. Howe
We present initial phase noise measurements in support of terahertz electronics, in the frequency range generally regarded as 0.1 to 10 THz. Using digital phase noise measurement techniques and an even-harmonic mixer, we achieve a phase noise measurement

Wireless Network Deployment in the Smart Grid: Design and Evaluation Issues

November 30, 2012
Author(s)
Camillo A. Gentile, David W. Griffith, Michael R. Souryal
The projected use of the power grid for “smart” applications such as advanced metering and distributed automation will require highly reliable, secure, well-designed and managed communication networks. While many of the benefits of wireless communications

A Credential Reliability and Revocation Model for Federated Identities

November 29, 2012
Author(s)
Hildegard Ferraiolo
A large number of Identity Management Systems (IDMSs) are being deployed worldwide that use different technologies for the population of their users. With the diverse set of technologies, and the unique business requirements for organizations to federate

Determination of the 5d6s 3D1 state lifetime and blackbody radiation clock shift in Yb

November 29, 2012
Author(s)
Kyle P. Beloy, Jeffrey A. Sherman, Nathan D. Lemke, Nathan M. Hinkley, Christopher W. Oates, Andrew D. Ludlow
The Stark shift of the ytterbium optical clock transition due to room temperature blackbody radiation is dominated by a static Stark effect, which was recently measured to high accuracy [J. A. Sherman et al., Phys. Rev. Lett. 108, 153002 (2012)]. However

High Bandwidth Optical Magnetometer

November 28, 2012
Author(s)
Ricardo Jimenez Martinez, William C. Griffith, Svenja A. Knappe, John E. Kitching, Mark Prouty
We demonstrate a scalar 87Rb optical magnetometer that retains magnetic eld sensitivities below 10 pT/√Hz over 3dB bandwidths of 10 kHz in an ambient eld Bo = 11.4 microT and using a measurement volume of 1 mm 3. The magnetometer operates at high atomic

Immobilization of Proteins on Carboxylic Acid-Functionalized Nanopatterns

November 28, 2012
Author(s)
John Peter Ngunjiri, Daniel J. Stark, Tian Tian, Kimberly Briggman, Jayne C. Garno
The immobilization of proteins on nanopatterned surfaces was investigated using in situ atomic force microscopy (AFM) and ex situ infrared reflectance-absorption spectroscopy (IRAS). The AFM-based lithography technique of nanografting provided control of

EUV magnetic-dipole lines from highly-charged high-Z ions with an open $3d$ shell

November 27, 2012
Author(s)
Yuri Ralchenko, John D. Gillaspy, Joseph Reader, Dmitry D. Osin
The electron beam ion trap (EBIT) at the National Institute of Standards and Technology was used to produce highly-charged ions of hafnium, tantalum and gold with an open $3d$ shell. The extreme-ultraviolet (EUV) spectra from these ions were recorded with

Molecular beam growth of graphene nanocrystals on dielectric substrates

November 27, 2012
Author(s)
Daniel Fischer, Ulrich Wurstbauer, Theanne Schiros, Cherno Jaye, A. S. Plaut, R. He, Albert Rigosi, Liuyan Zhao, Christopher Gutierrez, P. Kim, L. N. Pfeiffer, A. Pasupathy, A. Pinczuk, J. M. Garcia
A variety of methods have been reported to create graphene. These include the pervasive mechanical exfoliation of graphite1, as well as methods that obtain large area graphene such as thermal decomposition of SiC2,3, chemical vapor deposition on transition

A COLD-ATOM CLOCK BASED ON COHERENT POPULATION TRAPPING

November 26, 2012
Author(s)
Elizabeth A. Donley, Francois-Xavier R. Esnault, Eric M. Blanshan, John E. Kitching
A compact cold-atom clock based on coherent population trapping is being developed. The clock aims to ultimately achieve a timing uncertainty of a few nanoseconds per day. Here we present an initial evaluation of the three main systematic frequency shifts

Enabling accurate differential calibration of modern GPS receivers

November 26, 2012
Author(s)
Stefania Romisch, Victor S. Zhang, Thomas E. Parker, Steven R. Jefferts
The difference between the local time reference and a GNSS receiver's internal time base is an essential contributor to the calibration of that receiver when used as a timing device. In the past, in the absence of a PPS output signal provided by the

Energy Price Indices and Discount Factors for Life-Cycle Cost Analysis - 2012

November 26, 2012
Author(s)
Amy S. Rushing, Joshua D. Kneifel, Barbara C. Lippiatt
This is the 2012 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, 2012 to March 31, 2013
Displaying 22326 - 22350 of 73929
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