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Full-Text Articles in Bioresource and Agricultural Engineering
Computer Simulation Of The Melting Process In Linear Macromolecules, Donald W. Noid, George A. Pfeffer, Stephen Z. D. Cheng, Bernhard Wunderlich
Computer Simulation Of The Melting Process In Linear Macromolecules, Donald W. Noid, George A. Pfeffer, Stephen Z. D. Cheng, Bernhard Wunderlich
US Department of Energy Publications
Polymer crystal melting kinetics is simulated by using molecular dynamics. A simplified molecular model of polyethylene crystal melting consisting of one extended chain on a polyethylene-like crystal surface is presented. The simulation data indicate that the end-to-end distance (eed) of radius of gyration (rg) has a simple exponential dependence on time. The rate constants for eed and rg are found to be temperature and molecular length dependent. A more detailed analysis of polymer crystal melting will be described
In-Situ Stress Orientation And Magnritjde At The Fenton Geothermal Site, New Mexico, Determined From Wellbore Breakouts, Colleen A. Barton, Mark D. Zoback, Kerry L. Burns
In-Situ Stress Orientation And Magnritjde At The Fenton Geothermal Site, New Mexico, Determined From Wellbore Breakouts, Colleen A. Barton, Mark D. Zoback, Kerry L. Burns
US Department of Energy Publications
The acoustic borehole televiewer provides excellent data for the detection and measurement of stress-induced wellbore breakouts. Analog televiewer data from the Fenton Geothermal well EE-3 in New Mexico were digitized and interactivly processed for detection and analysis of azimuth and shape of stress-induced breakouts occurring in the well at depths of about 2.9 - 3.5 km. A statistical analysis of the measured breakout azimuths yields a well resolved orientation of least horizontal principal stress of 119 °, consistent with least principal stress data from the Rio Grande Rift. As the magnitude of the least horizontal compressive stress, Shmin, in …
Interactions Of Antiprotons With Atoms And Molecules, Mitio Inokuti
Interactions Of Antiprotons With Atoms And Molecules, Mitio Inokuti
US Department of Energy Publications
Antiproton beams of relatively low energies (below hundreds of MeV) have recently become available. The present article discusses the significance of those beams in the contexts of radiation physics and of atomic and molecular physics. Studies on individual collisions of antiprotons with atoms and molecules are valuable for a better understanding of collisions of protons or electrons, a subject with many applications. An antiproton is unique as' a stable, negative heavy particle without electronic structure, and it provides an excellent opportunity to study atomic collision theory. Comparison of the stopping powers of a material for an antiproton and a proton …