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Displaying 35026 - 35050 of 74229

Remotely Accessed Photovoltaic Power Experiment

March 21, 2006
Author(s)
W J. Hutzel, William M. Healy
A solar energy experiment that estimates the number of photovoltaic panels needed to provide supplemental power for a typical residence is described. The project is unique because it uses freely available on-line resources for collecting and analyzing

Characterizing Gaseous Air Cleaner Performance in the Field

March 20, 2006
Author(s)
Cynthia H. Reed, Steven J. Emmerich, Steven J. Nabinger
As part of an ongoing effort to better understand the performance of indoor air cleaners in buildings, the National Institute of Standards and Technology (NIST) has completed a series of gaseous air cleaner field tests and model simulations. This paper

Analysis of DNA Single Nucleotide Polymorphisms by Mass Spectrometry

March 17, 2006
Author(s)
Peter Vallone, John Butler
Single nucleotide polymorphisms(SNP) are the most frequent form of DNA sequence variation in the human genome and are becoming increasingly useful as genetic markers for genome mapping studies, medical diagnostics, and human identity testing. The primer

Conformational Changes Associated With Receptor-Stimulated Guanine Nucleotide Exchange in a Heterotrimeric G-Protein a-Subunit: NMR Analysis of the GTPgS-Bound States

March 17, 2006
Author(s)
K D. Ridge, N G. Abdulaev, Xi-Cheng Zhang, T Ngo, D M. Brabazon, John P. Marino
Solution NMR studies of a 15N-labeled G-protein ?-subunit (G?) chimera (15N-ChiT) reconstituted heterotrimer have previously shown that binding of ??-subunits induces a pre-activated conformation in G? that may facilitate interaction with R* and guanine

Phonon Broadening of Spectral Lines in Scanning Tunneling Spectroscopy

March 17, 2006
Author(s)
John William Gadzuk
The observation and interpretation of spectral lines associated with quasi-localized states in condensed matter systems has provided a rich source of information pertaining to the transient coupling of these states to their dynamic environment.1 While

Poisson transition rates from time-domain measurements with finite bandwidth

March 17, 2006
Author(s)
Ofer Naaman, Joe Aumentado
We show that in realistic time-domain measurements of a Poisson two-level system, the observed transition rates are renormalized downwards due to the finite bandwidth of the experiment. This effect introduces systematic errors in estimating the system''s

Fast Setting CPC-Chitosan Composite: Mechanical Properties and Dissolution Rates

March 16, 2006
Author(s)
Limin Sun, Hockin D. Xu, Shozo Takagi, Laurence C. Chow
Calcium phosphate cement (CPC) can self-harden in vivo to form hydroxyapatite with excellent osteoconductivity. In recent studies, CPC-chitosan composites were developed with high mechanical strength and washout resistance. The objectives of the present

Frequency-Resolved Coherent LIDAR using a Femtosecond Fiber Laser

March 15, 2006
Author(s)
William C. Swann, Nathan R. Newbury
We demonstrate a coherent lidar that uses a broadband femtosecond fiber laser as a source and resolves the returning heterodyne signal into N spectral channels by using an arrayed-waveguide grating. The data are processed incoherently to yield an N-times

Alkanethiols on Platinum: Multicomponent Self-Assembled Monolayers

March 14, 2006
Author(s)
D Y. Petrovykh, H Y. Kimura-Suda, A Opdahl, Lee J. Richter, Michael J. Tarlov, L J. Whitman
We have studied the formation of self-assembled monolayers (SAMs) of n-alkanethiols on platinum thin films using X-ray photoelectron spectroscopy (XPS), reflection-absorption infrared spectroscopy (RAIRS), spectroscopic ellipsometry (SE), and contact angle

Effects of Humidity on Unencapsulated Poly(thiophene) Thin Film Transistors

March 13, 2006
Author(s)
Michael L. Chabinyc, Fred Endicott, B D. Vogt, Dean DeLongchamp, Eric K. Lin, Yiliang Wu, Ping Liu, Beng S. Ong
The effects of humidity on unencapsulated polymeric thin-film transistors (TFTs) were investigated. TFTs were fabricated on glass substrates with inorganic gate dielectric and a semiconducting layer of poly[5,5 -bis(3-dodecyl-2-thienyl)-2,2 -bithiophene]

High Throughput Microfluidic Light Scattering for Aqueous Polymer Solutions

March 10, 2006
Author(s)
A I. Norman, Wenhua Zhang, Kathryn L. Beers, Eric J. Amis
A small-angle light scattering (SALS) apparatus, coupled with a specially designed microfluidic device was used, to monitor the structure of a diblock copolymer in aqueous solution. The closed-face design was fabricated between glass slides using a UV

Optical Properties of Fluids For 248 nm and 193 nm Immersion Photolithography

March 10, 2006
Author(s)
Simon G. Kaplan, John H. Burnett
We present measured values of the refractive index, thermo-optic coefficient, and absorption coefficient of a number of common organic solvents and aqueous inorganic solutions that may have application in immersion photolithography at 248 nm or 193 nm

Influence of surface energy and relative humidity on AFM nanomechanical contact stiffness

March 9, 2006
Author(s)
Donna C. Hurley, Malgorzata Kopycinska-Mueller, D Julthongpiput, Michael J. Fasolka
The effects of surface functionality and relative humidity (RH) on nanomechanical properties were investigated using atomic force acoustic microscopy (AFAM), a contact scanned probe microscopy (SPM) technique. Self-assembled monolayers (SAMs) with

Optical frequency measurements of 6s 2 S 1/2 - 6p 2 P 1/2 (D 1 )transitions in 133 Cs and their impact on the fine-structure constant

March 8, 2006
Author(s)
Vladislav Gerginov, K Calklins, B Tanner, John J. McFerran, Scott A. Diddams, Albrecht Bartels, Leo W. Hollberg
High resolution laser spectroscopy of 6s 2S 1/2 – 6p 2P 1/2 transition (D 1 line) in neutral 133Cs is performed in a highly collimated thermal atomic beam using a femtosecond laser frequency comb and narrow linewidth diode laser. The diode laser is offset

Optical frequency measurements of 6s 2 S 1/2 - 6p 2 P 1/2 (D1) transitions in 133 Cs and their impact on the fine-structure constant

March 8, 2006
Author(s)
Vladislav Gerginov, K Calklins, Carol Tanner, John J. McFerran, Scott A. Diddams, A Bartels, Leo W. Hollberg
High resolution laser spectroscopy of 6s 2S 1/2 – 6p 2P 1/2 transition (D1 line) in neutral 133Cs is performed in a highly collimated thermal atomic beam using a femtosecond laser frequency comb and narrow linewidth diode laser. The diode laser is offset
Displaying 35026 - 35050 of 74229
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