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Displaying 26 - 50 of 53812

A High-Field, Low-Current Superconducting Ioffe Magnetic Trap

October 12, 2021
Author(s)
S N. Dzhosyuk, C R. Brome, J S. Butterworth, P R. Huffman, C E. Mattoni, D N. McKinsey, R A. Michniak, L Yang, John M. Doyle
A superconducting Ioffe magnetic trap is designed, built and characterized. The trap consists of four racetrack-shaped quadrupole coils and two solenoid assemblies. Coils are wet wound with multifilament copper-clad NgTi superconducting wire embedded in an

A Loop in the N-terminal Region of MCM Mediates Communication With the Catalytic Domain

October 12, 2021
Author(s)
Nozomi Sakakibara, Rajesh Kasiviswanathan, E Melamud, Frederick P. Schwarz, Z Kelman
Minichromosome maintenance helicases are the presumptive replicative helicases, thought to separate the two strands of chromosomal DNA during replication. In archaea, the catalytic activity resides within the C-terminal region of the MCM protein. In

A Minimalist Sensor System for Mold Filling

October 12, 2021
Author(s)
S R. Kueh, S G. Advani, Richard~undefined~undefined~undefined~undefined~undefined Parnas
Reliable mold filling remains the most critical issue in the commercial application of liquid composite molding. Many techniques of observing the flow are either cumbersome or too invasive for routine service. Combining the sensor output from a single

A New Determination of G

October 12, 2021
Author(s)
J P. Schwarz, J E. Faller, T M. Niebauer, F Klopping, D S. Robertson, G Sasagawa
A short test run of the apparatus was conducted in February 1997 and gave promising results. A difference signal of about 80 υGal was observed, with reasonable scatter in G values from day to day. A sample of the data is seen in figure 1. This scatter

A New Reactive Molecular Dynamics Model Of Polymer Pyrolysis

October 12, 2021
Author(s)
Stanislav Stoliarov, Kenneth D. Smith, P R. Westmoreland, Richard E. Lyon, Marc R. Nyden
In this paper, we report progress that has been made in the development of an extension of classical force-field-based molecular dynamics (MD) to the simulation of chemical reactions. We review several studies of polymer pyrolysis that were performed using

A Predictive Formula for the Electron Stopping Power

October 12, 2021
Author(s)
Aleksander Jablonski, S Tanuma, Cedric J. Powell
We describe the development of a new analytical formula for the electron stopping power (SP) for electron energies between 200 eV and 30 keV. This formula describes the product of the SP and the inelastic mean free path (IMFP), and is a simple function of

A Structural Study of Electrodeposited Fe on GaAs(001)

October 12, 2021
Author(s)
Erik B. Svedberg, J Mallett, Leonid A. Bendersky, A G. Roy, William F. Egelhoff Jr., Thomas P. Moffat
The microstructure of Fe films electrodeposited onto n-GaAs(001) from FeCl_(2) and FeSO_(4)-(NH_(4)-(2)SO_(4) electro;ytes was examined by x-ray and electron diffraction. Symmetrical x-ray diffraction from film deposited from chloride solutions indicates a

A Summary of Heat-Flux Sensor Calibration Data

October 12, 2021
Author(s)
A V. Murthy, Gerald T. Fraser, D P. DeWitt
This paper presents a statistical evaluation of the responsivity data on a number of heat-flux sensors, calibrated using an electrical substitution radiometer as a transfer standard up to 5 W cm-2. The sensors, furnished by the customers, were of circular

A Two-Channel R-Matrix Analysis of Magnetic Field Induced Feshbach Resonances

October 12, 2021
Author(s)
N Nygaard, Barry I. Schneider, Paul S. Julienne
A Feshbach resonance arises in cold atom scattering due to the complex interplay between several coupled channels. However, the essential physics of the resonance may be encapsulated in a simplified model consisting of just two coupled channels. In this

Absorption Spectroscopy of EBT Model GAFCHROMIC TM Film

October 12, 2021
Author(s)
Slobodan Devic, Tomic Nada, Zhiyu Pang, Jan Seuntjens, Ervin Podgorsak, C K. Ross, Norman V. Klassen, Christopher G. Soares
The introduction of radiochromic films has solved some of the problems associated with conventional 2D radiation detectors. Their high spatial resolution, low energy dependence and near tissue-equivalence make them ideal for measurement of dose

Accelerator Mass Spectrometry Analysis of Carbonaceous Aerosols Captured in High Alpine Snow

October 12, 2021
Author(s)
R H. Weissenbok, Lloyd A. Currie, C Grollert, W Kutschera, J L. Marolf, A Priller, H Puxbaum, William N. Rom, P Steier
The capability for Accelerator Mass Spectrometry (AMS) to perform submilligram 14C measurements has considerable implications for environmental carbon research, especially for tracer studies of low concentration carbonaceous aerosols in remote regions. In

Acoustoelasticity, Theory and Experiment

October 12, 2021
Author(s)
L Jiang, Regis J. Kline, Y Yacobi, E Drescher-Krasicka
As a promising tool to characterize residual stress in engineering structural components, acoustoelasticity has been the subject of a great deal of research over the past forty years. Although considerable achievements have been derived, most approaches of

Additive-Containing Rinses for LER and Defectivity Control During High-Resolution Resist Patterning

October 12, 2021
Author(s)
D L. Goldfarb, S D. Burns, M Angelopolous, S Skordas, R L. Burns, M C. Lawson, C J. Brodsky, V Vishnu, E Jablonski, Vivek Prabhu, Ronald L. Jones, B D. Vogt, Christopher Soles, Eric K. Lin, Wen-Li Wu
The addition of a surface conditioning agent to the de-ionized water rinse used to quench the photoresist development process is an attractive methodology that can afford a controlled decrease in resist line edge roughness (LER) or a reduction in

Advanced Laser Cooling for the Atomic Space Clock

October 12, 2021
Author(s)
V Boyer, L Lising, S L. Rolston, William D. Phillips
An atomic clock works by comparing the frequency of a local oscillator (a micrwave generator) with the hyperfine transition of the cesium atom at 9.2 GHz. In general, the precision of a clock is limited by the observation time. For an atomic clock, it is
Displaying 26 - 50 of 53812