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Verification test of a 25kW class SOFC cogeneration system

Description: Osaka Gas and Tokyo Gas have high expectations for natural-gas-fueled Solid Oxide Fuel Cell (SOFC) cogeneration systems. SOFC offers many advantages for on-site cogeneration systems, such as high electrical efficiency, high quality by-product heat and low emissions. They are now executing a joint development program with Westinghouse Electric Corporation (hereinafter called as WELCO). This program is aimed to verify a 25kW class SOFC cogeneration system. This system, which was modified by repla… more
Date: December 31, 1997
Creator: Yokoyama, H.; Miyahara, A. & Veyo, S. E.
Item Type: Refine your search to only Article
open access

Vertical seismic profiling at Borehole B-1015, Lawrence Livermore National Laboratory: Motivation, data acquisition, data analysis, and formation velocities

Description: The initial goal of the three-dimensional (3-D) vertical seismic profiling (VSP) at Lawrence Livermore National Laboratory (LLNL) was to characterize seismic wave velocities and frequencies below the vadose zone in order to design the acquisition geometry for a high-resolution 3-D seismic reflection survey. VSPs are also used routinely to link surface seismic data with well logs. However, a test of the two-dimensional (2-D) seismic line recorded at the LLNL Livermore Site in the spring of 1994 … more
Date: January 30, 1997
Creator: Bainer, R. W.; Rector, J. W.; Braile, B.; Milligan, P. & Selbig, J.
Item Type: Refine your search to only Report
open access

Vertically integrated analysis of human DNA. Final technical report

Description: This project has been oriented toward improving the vertical integration of the sequential steps associated with the large-scale analysis of human DNA. The central focus has been on an approach to the preparation of {open_quotes}sequence-ready{close_quotes} maps, which is referred to as multiple-complete-digest (MCD) mapping, primarily directed at cosmid clones. MCD mapping relies on simple experimental steps, supported by advanced image-analysis and map-assembly software, to produce extremely … more
Date: October 1, 1997
Creator: Olson, M.
Item Type: Refine your search to only Report
open access

Very high efficiency photovoltaic cells based on fully organic multiple quantum wells. Quarterly technical progress report, 15 February 1995--15 May 1995

Description: The principal project objective is to demonstrate relatively high solar conversion efficiency using extremely low-cost, thin-film technology based on crystalline organic multiple quantum well (MQW) photovoltaic cells. The authors base their work on recent observations both in the laboratory and elsewhere that have indicated the quantum efficiency of organic photoconductors based on vacuum-deposited thin films can be increased by at least two orders of magnitude (to at least 10%) if the organic … more
Date: March 1, 1997
Creator: Forrest, S.R.
Item Type: Refine your search to only Report
open access

Very high redshift radio galaxies

Description: High redshift radio galaxies (HzRGs) provide unique targets for the study of the formation and evolution of massive galaxies and galaxy clusters at very high redshifts. We discuss how efficient HzRG samples ae selected, the evidence for strong morphological evolution at near-infracd wavelengths, and for jet-induced star formation in the z = 3 800 HzRG 4C41 17
Date: December 1, 1997
Creator: van Breugel, W. J. M.
Item Type: Refine your search to only Article
open access

Viability of long-lived fission products as signatures in forensic radiochemistry

Description: Forensic radiochemistry refers to studies on special nuclear materials, related to nonproliferation and anti-smuggling efforts. AMS (accelerator mass spectroscopy) measurement of long-lived fission products and U and Pu isotopes has the potential to significantly aid the field of forensic radiochemistry by providing new or more sensitive signatures and improving on the speed with which they can be determined. Expanding the suite of signatures obtainable form an illicit sample of special nuclear… more
Date: January 1, 1997
Creator: McAninch, J.E.; Proctor, I.D.; Stoyer, N.J. & Moody, K.J.
Item Type: Refine your search to only Report
open access

Vibration analysis of composite disks.

Description: Often, disks rotating at high speeds are fabricated from high-strength, filament-wound composites. The carbon and glass fiber bundles, or tows that makeup a filament, are often similar in different disk designs, and steady-state stress analyses are usually reported. Typically, little information is reported about the dynamic deformation and vibrations of the disk, which are important for understanding instabilities at high rotational speeds. First, experimental and FEM modal analyses are perfor… more
Date: November 18, 1997
Creator: Gupta, A.; Mulcahy, T. M.; Hull, J. R. & Abboud, R. G.
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open access

Vibration and stability of two tubes in crossflow

Description: Two tubes in tandem and normal to flow were studied on the basis of the unsteady-flow theory. Motion-dependent fluid forces were measured in a water channel, and the pitch-to-diameter ratio was 1.35. From the measured fluid forces, fluid damping and stiffness were calculated as a function of reduced flow velocity and several Reynolds numbers. Once the fluid-damping and fluid-stiffness coefficients are known, coupled vibration and stability of the two tubes in crossflow can be predicted.
Date: August 1, 1997
Creator: Zhu, S.; Chen, S.S. & Cai, Y.
Item Type: Refine your search to only Report
open access

Vibration-based health monitoring and model refinement of civil engineering structures

Description: Damage or fault detection, as determined by changes in the dynamic properties of structures, is a subject that has received considerable attention in the technical literature beginning approximately 30 years ago. The basic idea is that changes in the structure`s properties, primarily stiffness, will alter the dynamic properties of the structure such as resonant frequencies and mode shapes, and properties derived from these quantities such as modal-based flexibility. Recently, this technology ha… more
Date: October 1, 1997
Creator: Farrar, C.R. & Doebling, S.W.
Item Type: Refine your search to only Article
open access

Vibrational dynamics of crystalline L-alanine

Description: The authors report a new, complete vibrational analysis of L-alanine and L-alanine-d{sub 4} which utilizes IINS intensities in addition to frequency information. The use of both isotopomers resulted in a self-consistent force field for and assignment of the molecular vibrations in L-alanine. Some details of the calculation as well as a comparison of calculated and observed IINS spectra are presented. The study clarifies a number of important issues on the vibrational dynamics of this molecule a… more
Date: November 1, 1997
Creator: Bordallo, H. N.; Eckert, J. & Barthes, M.
Item Type: Refine your search to only Report
open access

VIII. The observational strategy: What are the issues; What must be done?

Description: Throughout its development, the observational strategy of the Earth Observing System (EOS) and its precursor programs has been consistent with that of the Mission to Planet Earth (MTPE) to detect and quantify climate change, document natural climate variability, understand variation and change, determine the causes and impacts of stratospheric ozone depletion, determine the impact of change on ecosystems and mitigate them. Space based observation can contribute significantly to each of these ob… more
Date: March 1, 1997
Creator: Canavan, G. H.
Item Type: Refine your search to only Report
open access

VIIth Blois Workshop summary: experimental

Description: The Blois Workshop has become a conference not just restricted to diffractive scattering, but including topics such as searches for SUSY and Higgs, measurements of the top mass and b-decays. I will mention these briefly but will mostly discuss new results (and needed future measurements) in hard diffraction at HERA and the Tevatron.
Date: October 1, 1997
Creator: Albrow, M.G.
Item Type: Refine your search to only Article
open access

The VIIth Blois workshop: Theory summary and factorization issues

Description: Theory presentations at this workshop have covered a wide range of topics. In addition to the traditional topics of elastic and diffractive scattering, the workshop has had a variety of interesting talks coming under the broad umbrella of ``Recent Advances in Hadron Physics.`` These have included review talks on lattice gauge theory, techniques for high-order perturbative QCD calculations, strong interaction effective field theories, the current status of QED and the construction of theories be… more
Date: September 17, 1997
Creator: White, A.R.
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open access

Village Power `97. Proceedings

Description: It is estimated that two billion people live without electricity and its services. In addition, there is a sizable number of rural villages that have limited electrical service, with either part-day operation by diesel gen-sets or partial electrification (local school or community center and several nearby houses). For many villages connected to the grid, power is often sporadically available and of poor quality. The U.S. National Renewable Energy Laboratory (NREL) in Golden, Colorado, has init… more
Date: September 1, 1997
Creator: Cardinal, J.; Flowers, L.; Taylor, R. & Weingart, J.
Item Type: Refine your search to only Article
open access

VIM: Initial ENDF/B-VI experience

Description: The VIM Monte Carlo particle transport code uses detailed continuous-energy cross sections produced from ENDF/B data by a set of specialized codes developed or adapted for use at Argonne National Laboratory. ENDF/B-IV data were used until about 1979, and Version V data since then. These VIM libraries were extensively benchmarked against the MC{sup 2}-2 code and against ZPR and ZPPR criticals for fast spectrum calculations, as well as other fast and thermal experiments and calculations. Recently… more
Date: August 1, 1997
Creator: Blomquist, R.N.
Item Type: Refine your search to only Article
open access

Virtual actors and avatars in a flexible user-determined-scenario environment

Description: VRaptor, a VR system for situational training that uses trainer-defined scenarios is described. The trainee is represented by an avatar; the rest of the virtual world is populated by virtual actors, which are under the control of trainer-defined scripts. The scripts allow reactive behaviors, but the trainer can control the overall scenario. This type of training system may be very useful in supplementing physical training.
Date: February 1997
Creator: Shawver, D. M.
Item Type: Refine your search to only Article
open access

Virtual nuclear weapons

Description: The term virtual nuclear weapons proliferation and arsenals, as opposed to actual weapons and arsenals, has entered in recent years the American lexicon of nuclear strategy, arms control, and nonproliferation. While the term seems to have an intuitive appeal, largely due to its cyberspace imagery, its current use is still vague and loose. The author believes, however, that if the term is clearly delineated, it might offer a promising approach to conceptualizing certain current problems of proli… more
Date: August 1, 1997
Creator: Pilat, J.F.
Item Type: Refine your search to only Report
open access

Virtual real-time inspection of nuclear material via VRML and secure web pages

Description: Sandia National Laboratories` Straight Line project is working to provide the right sensor information to the right user to enhance the safety, security, and international accountability of nuclear material. One of Straight Line`s efforts is to create a system to securely disseminate this data on the Internet`s World-Wide-Web. To make the user interface more intuitive, Sandia has generated a three dimensional VRML (virtual reality modeling language) interface for a secure web page. This paper w… more
Date: April 1, 1997
Creator: Nilsen, C.; Jortner, J.; Damico, J.; Friesen, J. & Schwegel, J.
Item Type: Refine your search to only Report
open access

Virtual reality and telepresence control of robots used in hazardous environments

Description: This is the final report of a two-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). A method was developed to incorporate learning and adaptive capabilities into traditional rule-based descriptions of environments. The learning and adapting capacity is critical to robot programming in highly unstructured and variable environments such as the operation of robots in gloveboxes. The technology is based on a hybrid expert system technolo… more
Date: October 1, 1997
Creator: Elling, J. W. & Hruska, S. I.
Item Type: Refine your search to only Report
open access

The Virtual Robotics Laboratory

Description: The growth of the Internet has provided a unique opportunity to expand research collaborations between industry, universities, and the national laboratories. The Virtual Robotics Laboratory (VRL) is an innovative program at Oak Ridge National Laboratory (ORNL) that is focusing on the issues related to collaborative research through controlled access of laboratory equipment using the World Wide Web. The VRL will provide different levels of access to selected ORNL laboratory equipment to outside … more
Date: March 1, 1997
Creator: Kress, R. L. & Love, L. J.
Item Type: Refine your search to only Article
open access

Virtual sine arm kinematic mount system

Description: A novel kinematic mount system for a vertical focusing mirror of the soft x-ray spectroscopy beamline at the Advanced Photon Source is described. The system contains three points in a horizontal plane. Each point consists of two horizontal linear precision stages, a spherical ball bearing, and a vertical precision stage. The horizontal linear stages are aligned orthogonally and are conjoined by a spherical ball bearing, supported by the vertical linear stage at each point. The position of each … more
Date: September 1, 1997
Creator: Xu, Z. & Randall, K.J.
Item Type: Refine your search to only Article
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