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Fishing for biodiversity: Novel methanopterin-linked C1 transfergenes deduced from the Sargasso Sea metagenome

Description: The recently generated database of microbial genes from anoligotrophic environment populated by a calculated 1,800 of major phylotypes (the Sargasso Sea metagenome) presents a great source for expanding local databases of genes indicative of a specific function. In this paper we analyze the Sargasso Sea metagenome in terms of the presence of methanopterin-linked C1 transfer genes that are signature for methylotrophy. We conclude that more than 10 phylotypes possessing genes of interest are pres… more
Date: July 1, 2004
Creator: Kalyuzhnaya, Marina G.; Nercessian, Olivier; Lapidus, Alla & Chistoserdova, Ludmila
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Upgrading Methane Using Ultra-Fast Thermal Swing Adsorption

Description: The purpose of this project is to design and demonstrate an approach to upgrade low-BTU methane streams from coal mines to pipeline-quality natural gas. The objective of Phase I of the project was to assess the technical feasibility and cost of upgrading low-BTU methane streams using ultra-fast thermal swing adsorption (TSA) using Velocys modular microchannel process technology. The objective of Phase II is to demonstrate the process at the bench scale. The project is on schedule and on budget.… more
Date: July 1, 2004
Creator: Tonkovich, Anna Lee
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Search for Excited or Exotic Electron Production Using the Dielectron + Photon Signature at CDF in Run II

Description: The author presents a search for excited or exotic electrons decaying to an electron and a photon with high transverse momentum. An oppositely charged electron is produced in association with the excited electron, yielding a final state dielectron + photon signature. The discovery of excited electrons would be a first indication of lepton compositeness. They use {approx} 202 pb{sup -1} of data collected in p{bar p} collisions at {radical}s = 1.96 TeV with the Collider Detector at Fermilab durin… more
Date: July 1, 2004
Creator: Gerberich, Heather Kay & U., /Duke
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Gridley Ethanol Demonstration Project Utilizing Gasification Technology: Feedstock Supply Plan; March 15, 2004

Description: The report describes a Feedstock Supply Plan for the proposed Gridley Ethanol Demonstration Project to be located in the City of Gridley Industrial Park in Gridley, California. This report also includes information on the establishment of the required infrastructure required for collecting approximately 113,000 Bone Dry Tons (BDT) annually for the proposed facility. Using the Pearson Technology from Aberdeen, Mississippi, and the related engineering assumptions for required feedstock, it is est… more
Date: July 1, 2004
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wind Farm Power System Model Development: Preprint

Description: In some areas, wind power has reached a level where it begins to impact grid operation and the stability of local utilities. In this paper, the model development for a large wind farm will be presented. Wind farm dynamic behavior and contribution to stability during transmission system faults will be examined.
Date: July 1, 2004
Creator: Muljadi, E. & Butterfield, C. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Multi-Pulse DARHT Machine-Plasma Plume Problem

Description: The plasma current decay time constant is predicted to be short compared to the pulse length and so self-focusing is predicted for most of the beam pulse. Four- pulse beam envelopes for a high dose case require mitigation, those for a low dose case do not. Methods of mitigation are summarized. Hose instability growth in the plume length is predicted to be minimal.
Date: July 1, 2004
Creator: Lauer, E J
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NAWIG News: The Quarterly Newsletter of the Native American Wind Interest Group; Summer 2004

Description: The United States is home to more than 700 American Indian tribes and Native Alaska villages and corporations located on 96 million acres. Many of these tribes and villages have excellent wind resources that could be commercially developed to meet their electricity needs or for electricity export. The Wind Powering America program engages Native Americans in wind energy development, and as part of that effort, the NAWIG newsletter informs readers of events in the Native American/wind energy com… more
Date: July 1, 2004
Item Type: Refine your search to only Journal/Magazine/Newsletter
Partner: UNT Libraries Government Documents Department
open access

Photovoltaic and Solar Thermal Modeling with the EnergyPlus Calculation Engine: Preprint

Description: EnergyPlus is a whole-building energy analysis software program developed by DOE. It was recently expanded with the addition of new active solar components for simulation of photovoltaic and solar thermal hot-water heating systems. The active solar models were integrated into the program because low- or zero-energy buildings often use renewable energy resources to accomplish their energy-saving goals. This paper provides an overview of the new models for PV and solar collectors in EnergyPlus an… more
Date: July 1, 2004
Creator: Griffith, B. T. & Ellis, P. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

State Renewable Energy News -- Vol.13, No. 2, Summer 2004 (Newsletter)

Description: This issue, a compilation of renewable electric activities in the states, is prepared for the National Association of Regulatory Utility Commissioners (NARUC). It includes news from Connecticut, Hawaii, Idaho, Illinois, Maryland, Michigan, New York, Rhode Island, Vermont.
Date: July 1, 2004
Item Type: Refine your search to only Journal/Magazine/Newsletter
Partner: UNT Libraries Government Documents Department
open access

Optimization of Utility-Scale Wind-Hydrogen-Battery Systems: Preprint

Description: Traditional utility-scale wind energy systems are not dispatchable; that is, the utility cannot instantaneously control their power output. Energy storage, which can come in many forms, is needed to add dispatchability to a wind farm. This study investigates two options: batteries and hydrogen.
Date: July 1, 2004
Creator: Fingersh, L. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Measurement of the t anti-t production cross-section at s**(1/2) = 1.96-TeV using lifetime tagging

Description: A measurement of the t{bar t} production cross section in the lepton+jets channels with the D0 detector at {radical}s = 1.96 TeV using the lifetime-tagging techniques is presented. The t{bar t} cross section is estimated from the combination of the e+jets and {mu}+jets channels. The obtained result {sigma}{sub t{bar t}} = 7.47{sub -1.14}{sup +1.22}(stat){sub -1.03}{sup +1.65}(syst) {+-} 0.49(lumi) pb is consistent with the Standard Model expectation.
Date: July 1, 2004
Creator: Khanov, Alexander
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Trombe Walls in Low-Energy Buildings: Practical Experiences; Preprint

Description: Low-energy buildings today improve on passive solar design by incorporating a thermal storage and delivery system called a Trombe wall. Trombe walls were integrated into the envelope of a recently completed Visitor Center at Zion National Park and a site entrance building at the National Wind Technology Center located at the National Renewable Energy Laboratory. NREL helped to design these commercial buildings to minimize energy consumption, using Trombe walls as an integral part of their desig… more
Date: July 1, 2004
Creator: Torcellini, P. & Pless, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

San Juanico Hybrid System Technical and Institutional Assessment: Preprint

Description: San Juanico is a fishing village of approximately 120 homes in the Municipality of Comondu, Baja California. In April, 1999, a hybrid power system was installed in San Juanico to provide 24-hour power, which was not previously available. Before the installation of the hybrid power system, a field study was conducted to characterize the electrical usage and institutional and social framework of San Juanico. One year after the installation of the hybrid power system a''post-electrification'' stud… more
Date: July 1, 2004
Creator: Corbus, D.; Newcomb, C. & Yewdall, Z.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

NREL Pyrheliometer Comparisons (NPC-2003), September 22 - October 3, 2003, Golden, Colorado

Description: NREL Pyrheliometer Comparisons (NPCs) are held annually at the Solar Radiation Research Laboratory (SRRL) in Golden, Colorado. Open to all pyrheliometer owner/operators, the NPC provides an opportunity to determine the unique WRR transfer factor for each participating pyrheliometer.
Date: July 1, 2004
Creator: Stoffel, T.; Reda, I. & Wilcox, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

ACME algorithms for contact in a multiphysics environment API version 2.2.

Description: An effort is underway at Sandia National Laboratories to develop a library of algorithms to search for potential interactions between surfaces represented by analytic and discretized topological entities. This effort is also developing algorithms to determine forces due to these interactions for transient dynamics applications. This document describes the Application Programming Interface (API) for the ACME (Algorithms for Contact in a Multiphysics Environment) library.
Date: July 1, 2004
Creator: Heinstein, Martin Wilhelm; Glass, Micheal W.; Gullerud, Arne S.; Brown, Kevin H.; Voth, Thomas Eugene & Jones, Reese E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A preliminary report on the development of MATLAB tensor classes for fast algorithm prototyping.

Description: We describe three MATLAB classes for manipulating tensors in order to allow fast algorithm prototyping. A tensor is a multidimensional or N-way array. We present a tensor class for manipulating tensors which allows for tensor multiplication and 'matricization.' We have further added two classes for representing tensors in decomposed format: cp{_}tensor and tucker{_}tensor. We demonstrate the use of these classes by implementing several algorithms that have appeared in the literature.
Date: July 1, 2004
Creator: Bader, Brett William & Kolda, Tamara Gibson (Sandia National Laboratories, Livermore, CA)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary versions of the MATLAB tensor classes for fast algorithm prototyping.

Description: We present the source code for three MATLAB classes for manipulating tensors in order to allow fast algorithm prototyping. A tensor is a multidimensional or Nway array. This is a supplementary report; details on using this code are provided separately in SAND-XXXX.
Date: July 1, 2004
Creator: Bader, Brett William & Kolda, Tamara Gibson (Sandia National Laboratories, Livermore, CA)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An analytically solvable eigenvalue problem for the linear elasticity equations.

Description: Analytic solutions are useful for code verification. Structural vibration codes approximate solutions to the eigenvalue problem for the linear elasticity equations (Navier's equations). Unfortunately the verification method of 'manufactured solutions' does not apply to vibration problems. Verification books (for example [2]) tabulate a few of the lowest modes, but are not useful for computations of large numbers of modes. A closed form solution is presented here for all the eigenvalues and eige… more
Date: July 1, 2004
Creator: Day, David Minot & Romero, Louis Anthony
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sundance 2.0 tutorial.

Description: Sundance is a system of software components that allows construction of an entire parallel simulator and its derivatives using a high-level symbolic language. With this high-level problem description, it is possible to specify a weak formulation of a PDE and its discretization method in a small amount of user-level code; furthermore, because derivatives are easily available, a simulation in Sundance is immediately suitable for accelerated PDE-constrained optimization algorithms. This paper is a… more
Date: July 1, 2004
Creator: Long, Kevin R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling an RF Cold Crucible Induction Heated Melter with Subsidence

Description: A method to reduce radioactive waste volume that includes melting glass in a cold crucible radio frequency induction heated melter has been investigated numerically. The purpose of the study is to correlate the numerical investigation with an experimental apparatus that in the above mentioned melter. Unique to this model is the subsidence of the glass as it changes from a powder to molten glass and drastically changes density. A model has been created that couples the magnetic vector potential … more
Date: July 1, 2004
Creator: Hawkes, Grant L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Automated infrasound signal detection algorithms implemented in MatSeis - Infra Tool.

Description: MatSeis's infrasound analysis tool, Infra Tool, uses frequency slowness processing to deconstruct the array data into three outputs per processing step: correlation, azimuth and slowness. Until now, an experienced analyst trained to recognize a pattern observed in outputs from signal processing manually accomplished infrasound signal detection. Our goal was to automate the process of infrasound signal detection. The critical aspect of infrasound signal detection is to identify consecutive proce… more
Date: July 1, 2004
Creator: Hart, Darren
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fatigue Damage in CFRP Woven Fabric Composites through Dynamic Modulus Measurements

Description: Advanced fiber reinforced composite materials offer substantial advantages over metallic materials for the structural applications subjected to fatigue loading. With the increasing use of these composites, it is required to understand their mechanical response to cyclic loading (1)-(4). Our major concern in this work is to macroscopically evaluate the damage development in composites during fatigue loading. For this purpose, we examine what effect the fatigue damage may have on the material pro… more
Date: July 1, 2004
Creator: Miyasaka, Chiaki & Telschow, K. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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