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Insights from Human/Mouse genome comparisons

Description: Large-scale public genomic sequencing efforts have provided a wealth of vertebrate sequence data poised to provide insights into mammalian biology. These include deep genomic sequence coverage of human, mouse, rat, zebrafish, and two pufferfish (Fugu rubripes and Tetraodon nigroviridis) (Aparicio et al. 2002; Lander et al. 2001; Venter et al. 2001; Waterston et al. 2002). In addition, a high-priority has been placed on determining the genomic sequence of chimpanzee, dog, cow, frog, and chicken … more
Date: March 30, 2003
Creator: Pennacchio, Len A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Plethodontid salamander mitochondrial genomics: A parsimonyevaluation of character conflict and implications for historical biogeography

Description: A new parsimony analysis of 27 complete mitochondrial genomic sequences is conducted to investigate the phylogenetic relationships of plethodontid salamanders. This analysis focuses on the amount of character conflict between phylogenetic trees recovered from newly conducted parsimony searches and the Bayesian and maximum likelihood topology reported by Mueller et al. (2004, PNAS, 101, 13820-13825). Strong support for Hemidactylium as the sister taxon to all other plethodontids is recovered fro… more
Date: January 19, 2005
Creator: Macey, J. Robert
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Monitoring microbe-induced physical property changes using high-frequency acoustic waveform data: Toward the development of a microbial megascope

Description: A laboratory investigation was undertaken to determine the effect of microbe generated gas bubbles in controlled, saturated sediment columns utilizing a novel technique involving acoustic wave propagation. Specifically, the effect of denitrifying bacteria on saturated flow conditions was evaluated in light of the stimulated production of N{sub 2} gas and the resulting plugging of the pore throats. The propagation of high frequency acoustic waves through the sediment columns was used to locate t… more
Date: May 20, 2002
Creator: Williams, Kenneth Hurst
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Statistical analysis of liquid seepage in partially saturated heterogeneous fracture systems

Description: Field evidence suggests that water flow in unsaturated fracture systems may occur along fast preferential flow paths. However, conventional macroscale continuum approaches generally predict the downward migration of water as a spatially uniform wetting front subjected to strong inhibition into the partially saturated rock matrix. One possible cause of this discrepancy may be the spatially random geometry of the fracture surfaces, and hence, the irregular fracture aperture. Therefore, a numerica… more
Date: December 1, 1999
Creator: Liou, T.S.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Flow dynamics and solute transport in unsaturated rock fractures

Description: Rock fractures play an important role in flow and contaminant transport in fractured aquifers, production of oil from petroleum reservoirs, and steam generation from geothermal reservoirs. In this dissertation, phenomenological aspects of flow in unsaturated fractures were studied in visualization experiments conducted on a transparent replica of a natural, rough-walled rock fracture for inlet conditions of constant pressure and flow rate over a range of angles of inclination. The experiments d… more
Date: October 1999
Creator: Su, G. W.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

DOE-NABIR PI Workshop: Abstracts January 31-February 2, 2000

Description: The mission of the NABIR program is to provide the scientific understanding needed to use natural processes and to develop new methods to accelerate those processes for the bioremediation of contaminated soils, sediments and groundwater at U.S. Department of Energy (DOE) facilities. The program is implemented through seven interrelated scientific research elements (Assessment, Bacterial Transport, Biogeochemical Dynamics, Bimolecular Science and Engineering, Biotransformation and Biodegradation… more
Date: January 1, 2000
Creator: Pratt, Mary (ed.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Coupling Multi-Component Models with MPH on Distributed Memory Computer Architectures

Description: A growing trend in developing large and complex applications on today's Teraflop scale computers is to integrate stand-alone and/or semi-independent program components into a comprehensive simulation package. One example is the Community Climate System Model which consists of atmosphere, ocean, land-surface and sea-ice components. Each component is semi-independent and has been developed at a different institution. We study how this multi-component, multi-executable application can run effectiv… more
Date: March 24, 2005
Creator: He, Yun & Ding, Chris
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Sharing the burden of climate change stabilization: An energysector perspective

Description: In this paper we discuss long-term least cost CO2stabilization scenarios based on the SRES AIM A1B scenario in the contextof an international burden-sharing regime. Starting from a stabilizationtarget, regional emission caps are formulated dynamically on the basis ofpast emissions. With these regional caps, the cost-optimal supply fuelmix in the energy sector in the four SRES world regions is calculated,and lower bounds on the volume of traded carbon are estimated. Theallocation scheme provides… more
Date: May 1, 2006
Creator: Wagner, Fabian & Sathaye, Jayant
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Market failures, consumer preferences, and transaction costs inenergy efficiency purchase decisions

Description: Several factors limit the energy savings potential and increase the costs of energy-efficient technologies to consumers. These factors may usefully be placed into two categories; one category is what economists would define as market failures and the other is related to consumer preferences. This paper provides a conceptual framework for understanding the roles of these factors, and develops a methodology to quantify their effects on costs and potentials of two energy efficient end uses - resid… more
Date: November 23, 2004
Creator: Sathaye, Jayant & Murtishaw, Scott
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

U.S, Department of Energy's Bioenergy Research Centers An Overview of the Science

Description: Alternative fuels from renewable cellulosic biomass--plant stalks, trunks, stems, and leaves--are expected to significantly reduce U.S. dependence on imported oil while enhancing national energy security and decreasing the environmental impacts of energy use. Ethanol and other advanced biofuels from cellulosic biomass are renewable alternatives that could increase domestic production of transportation fuels, revitalize rural economies, and reduce carbon dioxide and pollutant emissions. Accordin… more
Date: July 1, 2009
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterizing Aerosol Distributions and Optical Properties Using the NASA Langley High Spectral Resolution Lidar

Description: The objective of this project was to provide vertically and horizontally resolved data on aerosol optical properties to assess and ultimately improve how models represent these aerosol properties and their impacts on atmospheric radiation. The approach was to deploy the NASA Langley Airborne High Spectral Resolution Lidar (HSRL) and other synergistic remote sensors on DOE Atmospheric Science Research (ASR) sponsored airborne field campaigns and synergistic field campaigns sponsored by other age… more
Date: February 14, 2013
Creator: Hostetler, Chris & Ferrare, Richard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

U.S. Department of Energy's Bioenergy Research Centers An Overview of the Science

Description: Alternative fuels from renewable cellulosic biomass - plant stalks, trunks, stems, and leaves - are expected to significantly reduce U.S. dependence on imported oil while enhancing national energy security and decreasing the environmental impacts of energy use. Ethanol and other advanced biofuels from cellulosic biomass are renewable alternatives that could increase domestic production of transportation fuels, revitalize rural economies, and reduce carbon dioxide and pollutant emissions. Accord… more
Date: July 1, 2010
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Bioremediation of Metals and Radionuclides: What It Is and How It Works (2nd Edition)

Description: This primer is intended for people interested in environmental problems of the U.S. Department of Energy (DOE) and in their potential solutions. It will specifically look at some of the more hazardous metal and radionuclide contaminants found on DOE lands and at the possibilities for using bioremediation technology to clean up these contaminants. The second edition of the primer incorporates recent findings by researchers in DOE's Natural and Accelerated Bioremediation Research (NABIR) Program.… more
Date: September 30, 2003
Creator: Palmisano, Anna & Hazen, Terry
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

India's cement industry: Productivity, energy efficiency and carbon emissions

Description: Historical estimates of productivity growth in India's cement sector vary from indicating an improvement to a decline in the sector's productivity. The variance may be traced to the time period of study, source of data for analysis, and type of indices and econometric specifications used for reporting productivity growth. Analysis shows that in the twenty year period, 1973 to 1993, productivity in the aluminum sector increased by 0.8% per annum. An econometric analysis reveals that technical pr… more
Date: July 1, 1999
Creator: Schumacher, Katja & Sathaye, Jayant
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

India's aluminum industry: Productivity, energy efficiency and carbon emissions

Description: Historical estimates of productivity growth in India's aluminum sector vary from indicating an improvement to a decline in the sector's productivity. The variance may be traced to the time period of study, source of data for analysis, and type of indices and econometric specifications used for reporting productivity growth. An analysis shows that in the twenty year period, 1973 to 1993, productivity in the aluminum sector declined slightly by 0.2%. An econometric analysis reveals that technical… more
Date: July 1, 1999
Creator: Schumacher, Katja & Sathaye, Jayant
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

India's Fertilizer Industry: Productivity and Energy Efficiency

Description: Historical estimates of productivity growth in India's fertilizer sector vary from indicating an improvement to a decline in the sector's productivity. The variance may be traced to the time period of study, source of data for analysis, and type of indices and econometric specifications used for reporting productivity growth. Our analysis shows that in the twenty year period, 1973 to 1993, productivity in the fertilizer sector increased by 2.3% per annum. An econometric analysis reveals that te… more
Date: July 1, 1999
Creator: Schumacher, K. & Sathaye, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

On the transport of emulsions in porous media

Description: Emulsions appear in many subsurface applications includingbioremediation, surfactant-enhanced remediation, and enhancedoil-recovery. Modeling emulsion transport in porous media is particularlychallenging because the rheological and physical properties of emulsionsare different from averages of the components. Current modelingapproaches are based on filtration theories, which are not suited toadequately address the pore-scale permeability fluctuations and reductionof absolute permeability that a… more
Date: June 27, 2007
Creator: Cortis, Andrea & Ghezzehei, Teamrat A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

High Resolution PET with 250 micrometer LSO Detectors and Adaptive Zoom

Description: There have been impressive improvements in the performance of small-animal positron emission tomography (PET) systems since their first development in the mid 1990s, both in terms of spatial resolution and sensitivity, which have directly contributed to the increasing adoption of this technology for a wide range of biomedical applications. Nonetheless, current systems still are largely dominated by the size of the scintillator elements used in the detector. Our research predicts that developing… more
Date: January 8, 2012
Creator: Cherry, Simon R. & Qi, Jinyi
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fuzzy systems modeling of in situ bioremediation of chlorinatedsolve n ts

Description: A large-scale vadose zone-groundwater bioremediationdemonstration was conducted at the Savannah River Site (SRS) by injectingseveral types of gases (ambient air, methane, and nitrous oxide andtriethyl phosphate mixtures) through a horizontal well in the groundwaterat a 175 ft depth. Simultaneously, soil gas was extracted through aparallel horizontal well in the vadose zone at a 80 ft depth Monitoringrevealed a wide range of spatial and temporal variations ofconcentrations of VOCs, enzymes, and … more
Date: September 5, 2001
Creator: Faybishenko, Boris & Hazen, Terry C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ZioLib: A parallel I/O library

Description: In a distributed memory parallel environment, many applications rely on a serial I/O strategy, where the global array is gathered on a single MPI process and then written out to a file. I/O performance with this approach is largely limited by single process I/O bandwidth. Even when parallel I/O is used, satisfactory parallel scaling is not always observed. It is because in many applications fields are not necessarily in a most favorable parallel decomposition for I/O. The best I/O rates are obt… more
Date: August 1, 2003
Creator: Yang, Woo-Sun & Ding, Chris
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final Report for High Latitude Climate Modeling: ARM Takes Us Beyond Case Studies

Description: The main thrust of this project was to devise a method by which the majority of North Slope of Alaska (NSA) meteorological and radiometric data, collected on a daily basis, could be used to evaluate and improve global climate model (GCM) simulations and their parameterizations, particularly for cloud microphysics. Although the standard ARM Program sensors for a less complete suite of instruments for cloud and aerosol studies than the instruments on an intensive field program such as the 2008 In… more
Date: June 18, 2013
Creator: Russell, Lynn M. & Lubin, Dan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparative Genome Analysis in the Integrated Microbial Genomes (IMG) System

Description: Comparative genome analysis is critical for the effectiveexploration of a rapidly growing number of complete and draft sequencesfor microbial genomes. The Integrated Microbial Genomes (IMG) system(img.jgi.doe.gov) has been developed as a community resource thatprovides support for comparative analysis of microbial genomes in anintegrated context. IMG allows users to navigate the multidimensionalmicrobial genome data space and focus their analysis on a subset ofgenes, genomes, and functions of i… more
Date: March 1, 2006
Creator: Kyrpides, Nikos C. & Markowitz, Victor M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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