U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 3676 - 3700 of 74068

Tailoring the High-K Gate Dielectric/Sillicon Interface for CMOS Applications

October 12, 2021
Author(s)
Y S. Lin, R Puthenkovilakam, J P. Chang, C P. Bouldin, Igor Levin, Nhan Van Nguyen, Y Sun, P Pianetta, T Conard, W Vandervorst, V Venturo, S Selbrede
The interfacial properties, thermal stabilities, and the electrical characteristics of ZrO 2/ Si and ZrO 2/SiO 2/Si were investigated and the interfacial layer of as-deposited ZrO 2 on silicon is likely to be ZrSi xO y. The ZrO 2/ZrSi xO y/Si is

Temperature Effects on Surface Pattern Formation in Thin Block Copolymer Films

October 12, 2021
Author(s)
A P. Smith, Jack F. Douglas, Eric J. Amis, Alamgir Karim
Hole formation on the surface of thin films of symmetric diblock copolymers is investigated as a function of time, t, temperature, T, and film thickness, h. The size of the holes approaches a steady state value at long times and their long-time size is

The 3-0 Quadrupole Band in H2 by Cavity Ring-Down Spectroscopy

October 12, 2021
Author(s)
D C. Robie, Joseph T. Hodges
Several lines in the S and Q branches (including the previously unobserved Q32 and Q33 lines) of the 3-0 quadrupole band of H2 have been detected by cavity ring-down spectroscopy using a multimode laser with a long cavity. The noise equivalent absorption

The Crystal Chemistry of L-Ta 2 O 5 and Related Structures

October 12, 2021
Author(s)
I E. Grey, W G. Mumme, Robert S. Roth
Single crystals of a new form of L-Ta2O5 with a 19 x b superstructure have been synthesised by flux growth. The phase has C-centred monoclinic symmetry with a = 6.199(1) , b = 69.55(1) (= 19 x 3.66 ), c = 3.880 (1) . The structure was refined in space

The Effect of Finger Positioning on the Generation of Propulsive Force

October 12, 2021
Author(s)
S McDonald, J E. Faller
Freestyle swimming competition is extremely fierce, as the winner of a 50- or 100- meter sprint often beats the second place swimmer by amargin of less than one hundredth of a second. So every stroke counts, especially with regard to the swimmer's

The Effect of Interfacial Free Energies on the Stability of Microlaminates

October 12, 2021
Author(s)
A C. Lewis, A B. Mann, D V. Heerden, Daniel Josell, Timothy P. Weihs
Laminated composites with polycrystalline layers typically break down at high temperatures through grain boundary grooving and the pinch-off of individual layers. Such materials, when exposed to high temperatures, develop grooves where grain boundaries

The Effect of Ultrasonic Vibration of Posts on Root Surface Temperature

October 12, 2021
Author(s)
Andrew Huttula, Patricia Tordik, Glen Imamura, F Eichmiller, Scott McClanahan
This study measured root surface temperature changes when ultrasonic vibration, with and without irrigation, was applied to cemented endodontic posts. Twenty-six, extracted, single-rooted premolars were randomly divided into 2 groups. Root lengths were

The Effects of Water on the Fatigue Behavior for Pultruded Glass-Reinforced Composite

October 12, 2021
Author(s)
Kate Liao, Carl R. Schultesiz, Donald L. Hunston, L C. Brinson
Pultruded composites are finding increasing use in infrastructure and marine applications where they see prolonged exposure to environmental factors such as moisture. This work examines the fatigue behavior (4 point bending) in air and water for pultruded

The Goddard High Resolution Spectrograph: In-Orbit Performance

October 12, 2021
Author(s)
S R. Heap, J L. Linsky
The in-orbit performance of the Goddard High Resolution Spectrograph onboard the Hubble Space Telescope (HST) is presented. This report covers the pre-COSTAR period, when instrument performance was limited by the effects of spherical aberration of the

The Internal-Friction Tensor Q-1 iJ

October 12, 2021
Author(s)
Paul R. Heyliger, H M. Ledbetter, Sudook A. Kim
oustic-resonance spectroscopy enables obtaining the complete elastic-stiffness tensor C y in one measurement of the macroscopic-vibration frequencies of a regular-shape solid. Because the total elastic stiffness C y contains both real and imaginary parts

The Microwave Spectrum and Ground State Structure of H 2 O-HI

October 12, 2021
Author(s)
A McIntosh, T Walther, R R. Lucchese, J W. Bevan, R D. Suenram, A C. Legon
The microwave spectrum and ground state structure of H^ 2O HI are reported. The fitted ground state constants include: A 0=428.9 GHz, B 0=2189.7351(10) MHz, C 0=2175.9546(10) MHz, χ aa = -1479.399(20) MHz,(χ bb- χ cc) = -17.37(2) MHz. Evidence will be

The Mitochondrial Apoptosis-Induced Channel MAC and Bax Channels Are Regulated by Cytochrome C

October 12, 2021
Author(s)
Li Guo, D Pietkiewicz, M M. Pavlov, John J. Kasianowicz, L M. Dejean, S J. Korsmeyer, B Antonsson, K W. Kinnally
l-2 family proteins regulate the appearance of the high-conductance channel MAC (mitochondrial apoptosis-induced channel) 1 in the outer membranes of mitochondria early in apoptosis and regulate the release of cytochrome c during commitment to apoptosis

The Nanostructure Problem

October 12, 2021
Author(s)
Simon J. Billinge, Igor Levin
The powerful methods we have for solving the atomic structure of bulk crystals fail for nanostructured materials and there are currently no broadly applicable, quantitative and robust methods to replace them. The solution of this nanostructure problem is
Displaying 3676 - 3700 of 74068