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Search Publications

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Displaying 3701 - 3725 of 74089

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

The Role of Fluorine Chemistry in Anisotropic Etching of Dielectric Materials

October 12, 2021
Author(s)
B Ji, S A. Motika, P R. Badowski, S Dheandhanoo, C Timmons, D E. Hess, Eric C. Benck, Y Ye
Fluorine-containing compounds have for many years been utilized to etch dielectric materials such as silicon oxide. Maintaining the balance between the removal rate of material from the trench bottom and formation of the protective sidewall film is

The Spectrum of Singly Ionized Potassium, K II

October 12, 2021
Author(s)
K Pettersen, J O. Ekberg, I Martinson, Joseph Reader
Using 10.7 m and 3-m normal-incidence vacuum ultraviolet spectrographs, we investigated the spectrum of singly ionized potassium in the regions 495 612 and 1247 2150 . More than 120 new K II lines were identified. The previous work on this spectrum was

The Suppression of Orange-Peel Coupling in Magnetic Tunnel Junctions by Pre-Oxidation

October 12, 2021
Author(s)
William F. Egelhoff Jr., Robert McMichael, Cindi L. Dennis, Mark D. Stiles, Alexander J. Shapiro, Brian B. Maranville, Cedric J. Powell
We have have found that pre-oxidation of the bottom Co electrode in magnetic tunnel junctions (MTJs) very effectively suppresses orange-peel coupling. The result is a free layer that is much softer. Work by others has demonstrated that pre-oxidation is
Displaying 3701 - 3725 of 74089