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open access

The Story of Consumer Credit

Description: Three young basketball fans discuss the benefits and dangers of credit use, why interest rates on different types of loans differ, how to establish a credit history, and the rights of users of consumer credit.
Date: 2000
Creator: Federal Reserve Bank of New York. Public Information Department.
open access

NLC photon collider option progress and plans

Description: The idea of producing beams of high energy photons by Compton backscattering of laser photons was proposed over 20 years ago. At the time, producing the required laser pulses was not feasible. However, recent advances in high average power, diode pumped lasers appear to have solved this problem. The US Collaboration is now turning its attention to the engineering requirement of mating the laser and optics components with the accelerator structures in the confined space of the a colliding beam i… more
Date: August 31, 2000
Creator: Gronberg, J.
open access

Material transfer system in support of the plutonium immobilization program

Description: The Plutonium Immobilization Program requires development of the process and plant prototypic equipment to immobilize surplus plutonium in ceramic for long-term storage. Because of the hazardous nature of plutonium, it was necessary to develop a remotely operable materials transfer system which can function within the confines of a glovebox. In support of this work at LLNL, such a material transfer system (MTS) was developed. This paper presents both the mechanical and controls parts making up … more
Date: December 20, 2000
Creator: Pak, D
open access

Paradyn a parallel nonlinear, explicit, three-dimensional finite-element code for solid and structural mechanics user manual

Description: ParaDyn is a parallel version of the DYNA3D computer program, a three-dimensional explicit finite-element program for analyzing the dynamic response of solids and structures. The ParaDyn program has been used as a production tool for over three years for analyzing problems which range in size from a few tens of thousands of elements to between one-million and ten-million elements. ParaDyn runs on parallel computers provided by the Department of Energy Accelerated Strategic Computing Initiative … more
Date: June 1, 2000
Creator: Hoover, C G; DeGroot, A J & Sherwood, R J
open access

Synthesis and Characterization of Porous Hydroxyapatite and Hydroxyapatite Coatings

Description: A technique is developed to construct bulk hydroxyapatite (HAp) with different cellular structures. The technique involves the initial synthesis of nanocrystalline hydroxyapatite powder from an aqueous solution using water-soluble compounds and then followed by spray drying into agglomerated granules. The granules were further cold pressed and sintered into bulks at elevated temperatures. The sintering behavior of the HAp granules was characterized and compared with those previously reported. R… more
Date: October 25, 2000
Creator: Nieh, T. G.; Choi, B. W. & Jankowski, Alan Frederic
open access

Relative x-ray backlighter intensity comparison of ti and ti/sc combination foils driven in double-sided and single-sided laser configuration

Description: Use of multiple backlighter foils and/or double-sided laser interaction geometry with backlit imaging can result in improved backlighter efficiency. An experimental comparison of backlighter intensity for Ti foils and Ti/Sc combination foils in both the one-sided and double-sided laser-interaction configuration is presented. Spectrally-integrated framing camera images show intensity contributions of front and rear backlighter surfaces for both foil types. Analysis of time-resolved x-ray spectra… more
Date: June 5, 2000
Creator: Bullock, A. B.; Landen, O. L. & Bradley, D. K.
open access

Relative stability of silicon self-interstitial defects

Description: {l_brace}311{r_brace} defects and dislocation loops are formed after ion-implantation and annealing of a silicon wafer. Recent Transmission Electron Microscopy studies by Li and Jones have shown that sub-threshold dislocation loops nucleate from {l_brace}311{r_brace} defects. In our study, the conjugate gradient method with the Stillinger Weber potential is used to relax different configurations such as {l_brace}311{r_brace} defects with a maximum of five chains and perfect dislocation loops. F… more
Date: April 11, 2000
Creator: Subramanian, G; Jones, K S; Law, M E; Caturla, M J; Theiss, S & Diaz de la Rubia, T
open access

Micromechanical characterization tools for highly-filled polymers

Description: We are attempting to characterize and model the micromechanical response of highly-filled polymers. In this class of materials, the continuous plastic binder used to bond the highly-filled material dominates the observed viscoelastic response. As a result, realistic lifetime analysis of these materials will require a thorough understanding of the contribution of the plastic binder. Laboratory applications of these materials include plastic bonded explosives, propellants, a variety of specialize… more
Date: February 16, 2000
Creator: Groves, S; DeTeresa, S; Cunningham, B; Ciarlo, D; Allen, D; Clayton, K et al.
open access

Institute for scientific computing research;fiscal year 1999 annual report

Description: Large-scale scientific computation, and all of the disciplines that support it and help to validate it, have been placed at the focus of Lawrence Livermore National Laboratory by the Accelerated Strategic Computing Initiative (ASCI). The Laboratory operates the computer with the highest peak performance in the world and has undertaken some of the largest and most compute-intensive simulations ever performed. Computers at the architectural extremes, however, are notoriously difficult to use effi… more
Date: March 28, 2000
Creator: Keyes, D
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