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in publisher: "Lawrence Berkeley National Laboratory"  
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Cosmological moduli problem in a supersymmetric model with direct gauge mediation

Description: Recently, an interesting class of the direct gauge mediation supersymmetry (SUSY) breaking models are proposed, in which the minimum of the potential of the SUSY breaking field is determined by the inverted hierarchy mechanism. We consider their cosmological implications. In this class of models, SUSY breaking field has a very flat potential, which may have a cosmological importance. Assuming the initial amplitude of the SUSY breaking field to be of the order of the Planck scale, it can be a so… more
Date: July 7, 1998
Creator: Moroi, Takeo
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Slowing leaking electricity to a trickle

Description: Electronics play an increasingly pervasive role in home appliances and office equipment. This is generally a good thing because the electronics help provide new features and amenities. Electronic controls can also reduce energy use by providing the services only when consumers actually need them. On the other hand, these electronic features often continue to consume energy even while switched off or not performing their principal service. The technical term for this phenomenon is ''standby powe… more
Date: July 1, 1998
Creator: Meier, Alan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Isotope constraints on the involvement of fluids in the San Andreas Fault System, California

Description: Fluids are suspected to play a major role in earthquake mechanics, especially in the case of the weak San Andreas Fault (SAF). Models developed to explain the weakness of the fault are similar but rely on different fluid sources. A recent study of groundwaters associated with the SAF has provided evidence for a geopressured mantle fluid source (Kennedy et al., 1997). We present here an isotope study comparing deformation zones (gouges, breccias, fault veins, slickensides, cataclasites), and vei… more
Date: July 1, 1998
Creator: Pili, E.; Kennedy, B. M.; Conrad, S. M.; Gratier, J. -P. & Poitrasson, F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

PC and monitor night status: Power management enabling and manual turn-off

Description: While office equipment accounts for about 7 percent of commercial building energy use, this reflects considerable energy savings from the use of automatic power management. Most of these savings were gained through the use of low-power modes that meet the criteria of the U.S. EPA's Energy Star program. Despite this success, there are large amounts of additional savings that could be gained if all equipment capable of power management use were enabled and functioning. A considerable portion of e… more
Date: July 30, 1998
Creator: Nordman, Bruce; Meier, Alan & Piette, Mary Ann
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

State-of-the-art software for window energy-efficiency rating and labeling

Description: Measuring the thermal performance of windows in typical residential buildings is an expensive proposition. Not only is laboratory testing expensive, but each window manufacturer typically offers hundreds of individual products, each of which has different thermal performance properties. With over a thousand window manufacturers nationally, a testing-based rating system would be prohibitively expensive to the industry and to consumers. Beginning in the early 1990s, simulation software began to b… more
Date: July 1, 1998
Creator: Arasteh, D.; Finlayson, E.; Huang, J.; Mitchell, R.; Rubin, M. & Huizenga, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

New 3D parallel GILD electromagnetic modeling and nonlinear inversion using global magnetic integral and local differential equation

Description: This paper describes a new 3D parallel GILD electromagnetic (EM) modeling and nonlinear inversion algorithm. The algorithm consists of: (a) a new magnetic integral equation instead of the electric integral equation to solve the electromagnetic forward modeling and inverse problem; (b) a collocation finite element method for solving the magnetic integral and a Galerkin finite element method for the magnetic differential equations; (c) a nonlinear regularizing optimization method to make the inve… more
Date: July 1, 1998
Creator: Xie, G.; Li, J.; Majer, E. & Zuo, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Seismic imaging of the shallow subsurface with high frequency seismic measurements

Description: Elastic wave propagation in highly heterogeneous media is investigated and theoretical calculations and field measurements are presented. In the first part the dynamic composite elastic medium (DYCEM) theory is derived for one-dimensional stratified media. A self-consistent method using the scattering functions of the individual layers is formulated, which allows the calculation of phase velocity, attenuation and waveform. In the second part the DYCEM theory has been generalized for three-dimen… more
Date: July 1, 1998
Creator: Kaelin, B.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

A Report on the Workshop on the Uses and Generation ofFemtosecond Radiation

Description: We describe the proceedings of the Workshop on the Uses and Generation of Femtosecond Radiation, held at the E.O. Lawrence Berkeley National Laboratory (LBNL), in February 1998, and some of the ideas that were generated subsequent to the workshop. The motivation for this workshop was to bring together accelerator physicists interested in the generation of ultra-short (< 200 fs) pulses of XUV and x-ray radiation, and scientists interested in using them. The primary purpose of the workshop was to… more
Date: July 1, 1998
Creator: Jackson, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

CFD Simulation of Infiltration Heat Recovery

Description: Infiltration has traditionally been assumed to affect the energy load of a building by an amount equal to the product of the infiltration flow rate and the sensible enthalpy difference between inside and outside. Results from detailed computational fluid dynamics simulations of five wall geometries over a range of infiltration rates show that heat transfer between the infiltrating air and walls can be substantial, reducing the impact of infiltration. Factors affecting the heat recovery are leak… more
Date: July 1, 1998
Creator: Buchanan, C. R. & Sherman, M. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A chaotic-dynamical conceptual model to describe fluid flow and contaminant transport in a fractured vadose zone. 1997 progress report and presentations at the annual meeting, Ernest Orlando Lawrence Berkeley National Laboratory, December 3--4, 1997

Description: Understanding subsurface flow and transport processes is critical for effective assessment, decision-making, and remediation activities for contaminated sites. However, for fluid flow and contaminant transport through fractured vadose zones, traditional hydrogeological approaches are often found to be inadequate. In this project, the authors examine flow and transport through a fractured vadose zone as a deterministic chaotic dynamical process, and develop a model of it in these terms. Initiall… more
Date: July 1, 1998
Creator: Faybishenko, B.; Doughty, C. & Geller, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Advanced Light Source Compendium of User Abstracts andTechnical Reports 1997

Description: The Advanced Light Source (ALS), a national user facility located at Ernest Orlando Lawrence Berkeley National Laboratory of the University of California is available to researchers from academia, industry, and government laboratories. Operation of the ALS is funded by the Department of Energy's Office of Basic Energy Sciences. This Compendium contains abstracts written by users summarizing research completed or in progress during 1997, ALS technical reports describing ongoing efforts related t… more
Date: July 1, 1998
Creator: Cross, J.; Devereaux, M. K.; Dixon, D. J. & Greiner, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measuring advances in HVAC distribution system designs

Description: Substantial commercial building energy savings have been achieved by improving the performance of the HVAC distribution system. The energy savings result from distribution system design improvements, advanced control capabilities, and use of variable-speed motors. Yet, much of the commercial building stock remains equipped with inefficient systems. Contributing to this is the absence of a definition for distribution system efficiency as well as the analysis methods for quantifying performance. … more
Date: July 1, 1998
Creator: Franconi, Ellen
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Error reduction techniques for measuring long synchrotron mirrors

Description: Many instruments and techniques are used for measuring long mirror surfaces. A Fizeau interferometer may be used to measure mirrors much longer than the interferometer aperture size by using grazing incidence at the mirror surface and analyzing the light reflected from a flat end mirror. Advantages of this technique are data acquisition speed and use of a common instrument. Disadvantages are reduced sampling interval, uncertainty of tangential position, and sagittal/tangential aspect ratio othe… more
Date: July 1998
Creator: Irick, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Laser acceleration in vacuum, gases, and plasmas withcapillary waveguide

Description: I propose a new method for laser acceleration of relativistic electrons using the leaky modes of a hollow dielectric waveguide. The hollow core of the waveguide can be either in vacuum or filled with uniform gases or plasmas. In case of vacuum and gases, TM<sub>01</sub> mode is used for direct acceleration. In case of plasmas, EH<sub>11</sub> mode is used to drive longitudinal plasma wave for acceleration. Structure damage due to high power laser can be avoided by choosing a core radius suffici… more
Date: July 1, 1998
Creator: Xie, Ming
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Finite element modeling of the effect of interface anomalies on thermal stresses in alumina scales

Description: The scales that grow from oxidation often develop a convoluted morphology or interface pores. High thermal stresses can develop locally and are potentially detrimental to the scale or interface integrity. Finite element simulations are used to examine residual thermal stresses and strains that result when these deviations from a flat interface have formed, and the resulting geometry is subsequently cooled to room temperature. A variety of geometries will be considered for alumina scales on a Fe… more
Date: July 1, 1998
Creator: Wright, J. K.; Williamson, R. L.; Hou, P. Y.; Cannon, R. M.; Renusch, D.; Veal, B. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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