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Displaying 3576 - 3600 of 74027

Shape of Hollow Dislocation Cores: Elastic and Anisotropic Surface Energy Effects

October 12, 2021
Author(s)
David J. Srolovitz, N Sridhar, J P. Hirth, John W. Cahn
Evidence for the existence of hollow core dislocations has existed for nearly forty years. Such hollow cores are often found in growth spirals associated with screw dislocations. Examples of this type of morphology may be found in silicon carbide, copper

Simulating Thermal Response of EB-PVD Thermal Barrier Coating Microstructures

October 12, 2021
Author(s)
M Bartsch, U Schulz, J M. Dorvaux, O Lavigne, Lin-Sien H. Lum, Stephen A. Langer
As ceramic thermal barrier coatings (TBC) are used in more critical applications in advanced engines, knowing basic physiproperties of TBC's is essential for design and reliability assessment. In particular, knowledge of thermal conductivity is cruciin

Simulation of a Single Asperity Impacts at Head-Disk Interface

October 12, 2021
Author(s)
Tze J. Chuang, Stephen M. Hsu
During the track accessing mode of a hard disk drive, the flying height of the slider over the disk surface becomes smaller and smaller as the demand in data storage a real density increases. As a result, the propensity of glide avalanche is bound to

SiO 2 /Si 3 N 4 /A1 2 O 3 Stacks on Silicon for Scaled-Down Memory Devices: Effects of Interfaces and Thermal Annealing

October 12, 2021
Author(s)
M Lisiansky, A Heiman, M Kovler, Y Roizin, Igor Levin, A Gladkikh, M Oksman, R Edrei, A A. Hofman, Y Shnieder, T Claasen
Effects of interfaces and thermal annealing on the electrical performance of the SiO2/Si3N4/A12O3 (ONA) stacks in non-volatile memory devices were investigated. Structural and electrical characterization demonstrated the principal role of the Si3N4/A12O3

Sixth Annual Report on Federal Agency Use of Voluntary Consensus Standards

October 12, 2021
Author(s)
K L. McIntyre, M B. Moore
Document is the Annual Report on Federal Agency Use of Voluntary Consensus Standards required to be submitted by NIST the office of Management Budget (OMB) under the National Technology Transfer and Advancement Act and OMB Circular A-119. It contains a

Small Angle Neutron Scattering Measurement of Silicon Nanoparticle Size Distribution

October 12, 2021
Author(s)
Jonghoon Choi, Shih-Huang Tung, Nam S. Wang, Vytas Reipa
We have determined the particle size distribution profiles of octane terminated silicon nanoparticle suspensions, produced using the sonication of electrochemically etched Si wafer. Small angle neutron scattering data was analyzed separately in the high (0

Soft X-Ray Fluorescence Studies of Solids

October 12, 2021
Author(s)
J A. Carlisle, Steven R. Blankenship, R N. Smith, Eric L. Shirley, L J. Terminello, J J. Jia, T A. Callcott, D L. Ederer
Resonant inelastic x-ray scattering (RIXS) has been observed in many systems above and below their core threshold. Below threshold, inelastic-loss features are observed, which disperse linearly with excitation energy, but as the excitation increases above

Software Specifications for Build LCC

October 12, 2021
Author(s)
M A. Ehlen, S Fuller
The report provides a list of guidelines for integrating two software programs that are extensively used by agencies of the federal government to evaluate the cost effectiveness of building-related investments, mainly for energy and water conservation

Solidus Phase Relationships in the AO-Al 2 O 3 -Nb 2 O 5 (A = Ca, Sr) Systems

October 12, 2021
Author(s)
Julia Y. Chan, Wilma Feb-Ayala, L D. Rotter, Igor Levin, Richard G. Geyer
Dielectric ceramics for wireless communications exhibiting modest permittivity, high quality factor (Q), and near-zero temperature coefficient are needed for high frequency, high power applications. Efforts are in progress to replace Ta 2O 5-based ceramics

Soluble Amyloid [Beta] Oligomers Affect Dielectric Properties by Membrane Incorporation and Domain Formation: Implications for Cell Toxicity

October 12, 2021
Author(s)
G Valinius, K F. Heinrich, R Budvytye, David J. Vanderah, Y Sokolov, J Hall, M Losche
Water-soluble prefibrillar amyloid b (Ab1 42) oligomers affect model bilayers by greatly reducing the membrane barrier to ion transport, as previously reported for Ab in many papers. However, important signatures of the molecular transport mechanism are

Some Properties of Irregular 3-D Particles

October 12, 2021
Author(s)
Michael A. Taylor, Edward Garboczi, S T. Erdogan, D Fowler
This paper discusses some of the properties of irregular particles that are of interest to engineers, including volume, density, & surface area. Numerical and statistical information on these properties is essential (a) for a better understanding of

Some Statistical Methods Applicable to Key Comparisons Studies

October 12, 2021
Author(s)
Hariharan K. Iyer, Chih-Ming Wang, Dominic F. Vecchia
Results of International Key Comparisons of National Measurement Standards provide the technical basis for the Mutual Recognition Arrangement formulated by Le Comite International des Poids et Mesures. With many key comparisons already completed and a

Space Charge Characterization for the 21st Century

October 12, 2021
Author(s)
G Damamme, C LeGressus, A S. DeReggi
The various methods of characterizing insulating materials by their ability to take up charge, retain it, and release it are reviewed critically in search of measurable quantities that could be used to predict material behavior under stress up to failure

Species Formation and Burning Characteristics of Scaled Propane Compartment Fires

October 12, 2021
Author(s)
C J. Wieczorek, U Vandsburger, J E. Floyd
Fires occurring in dense occupancies such as hospitals, dormitories, and nursing homes pose a serious threat to occupants due to the risk of carbon monoxide poisoning. This risk is becoming increasingly important as the population demographics of developed

Specific DNA Binding to CRP Induces Conformational Changes in the CRP and the DNA in Solution: A Small-Angle Neutron Scattering Study

October 12, 2021
Author(s)
Susan T. Krueger, S. K. Gregurick, Y. Shi, S. Wang, B Waldkowski, Frederick P. Schwarz
The transcription activator, 3'-5' cyclic adenosine monophosphate (cAMP) receptor protein (CRP), when ligated with cAMP, activates the transcription of over 25 operons, which code for enzymes involved in carbohydrate metabolism in E. coli. Small-angle

Spectral Data for Gallium: Ga I through Ga XXXI

October 12, 2021
Author(s)
T Shirai, Joseph Reader, Alexander Kramida, J Sugar
The energy levels and spectral lines of gallium atom in all stages of ionization have been compiled. Experimental data on spectral lines and energy levels exist for spectra Ga I through Ga VII, Ga XXIII through Ga XXVI, and Ga XXX. For Li-like Ga XXIX
Displaying 3576 - 3600 of 74027