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Adaptive dimension reduction for clustering high dimensional data

Description: It is well-known that for high dimensional data clustering, standard algorithms such as EM and the K-means are often trapped in local minimum. many initialization methods were proposed to tackle this problem, but with only limited success. In this paper they propose a new approach to resolve this problem by repeated dimension reductions such that K-means or EM are performed only in very low dimensions. Cluster membership is utilized as a bridge between the reduced dimensional sub-space and the … more
Date: October 2002
Creator: Ding, Chris; He, Xiaofeng; Zha, Hongyuan & Simon, Horst
Partner: UNT Libraries Government Documents Department
open access

Advanced Gasification-Based Fuel Conversion and Electric Energy Production System

Description: Boise Paper Solutions and the Gas Technology Institute (GTI) are cooperating to develop, demonstrate and place in continuous operation an advanced biomass gasification-based power generation system suitable for near-term commercial deployment in the Forest Products Industry. The system will be used in conjunction with, rather than in place of, existing wood waste fired boilers and flue gas cleanup systems. The novel system will include three advanced technological components based on GTI's RENU… more
Date: October 2002
Creator: Rabovitser, Joseph & Bryan, Bruce
Partner: UNT Libraries Government Documents Department
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Advanced Stripper Gas Produced Water Remediation, Quarterly Technical Report: July-September 2002

Description: Natural gas and oil production from stripper wells also produces water contaminated with hydrocarbons, and in most locations, salts and trace elements. The hydrocarbons are not generally present in concentrations that allow the operator to economically recover these liquids. Produced liquids, (Stripper Gas Water) which are predominantly water, present the operator with two options; purify the water to acceptable levels of contaminates, or pay for the disposal of the water. The project scope inv… more
Date: October 2002
Creator: Bonner, Harry & Malmquist, Roger
Partner: UNT Libraries Government Documents Department
open access

ALEGRA: User Input and Physics Descriptions Version 4.2

Description: ALEGRA is an arbitrary Lagrangian-Eulerian finite element code that emphasizes large distortion and shock propagation. This document describes the user input language for the code.
Date: October 2002
Creator: Boucheron, Edward A.; Brown, Kevin H.; Budge, Kent G.; Burns, Shawn P.; Carroll, Daniel E.; Carroll, Susan et al.
Partner: UNT Libraries Government Documents Department
open access

Annual Technical Status Report of the Regulatory Assistance Project: September 2000--September 2001

Description: This report summarizes the work in 2001 by the Regulatory Assistance Project (RAP), under contract to the National Renewable Energy Laboratory. This work focused on identifying and removing the regulatory and institutional barriers that keep the full economic value of distributed resources from being realized. The following five reports present the work details: (1) Accommodating Distributed Resources in Wholesale Markets, NREL/SR-560-32497; (2) Distributed Resource Distribution Credit Pilot Pr… more
Date: October 2002
Partner: UNT Libraries Government Documents Department
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Apollo(R) Thin Film Process Development: Final Technical Report, April 1998 - April 2002

Description: BP Solar first started investigative work on CdTe photovoltaics in 1986. The module product name chosen for the CdTe devices is Apollo. The deposition method chosen was electrochemical deposition due to its simplicity and good control of stoichiometric composition. The window layer used is CdS, produced from a chemical-bath deposition. Initial work focused on increasing photovoltaic cell size from a few mm2 to 900 cm2. At BP Solar's Fairfield plant, work is focused on increasing semiconductor d… more
Date: October 2002
Creator: Cunningham, D. W.
Partner: UNT Libraries Government Documents Department
open access

An Approach to Wireless Communications at Sandia National Laboratories

Description: Wireless communication plays an increasing role in military, industrial, public safety, and academic computer networks. Although in general, radio transmitters are not currently permitted in secured areas at Sandia, wireless communications would open new opportunities, allowing mobile and pervasive user access. Without wireless communications, we must live in a ''non-mainstream'' world of fixed, wired networks, where it becomes ever more difficult to attract and retain the best professionals. T… more
Date: October 2002
Creator: Witzke, Edward L.
Partner: UNT Libraries Government Documents Department
open access

Appropriations for FY2003: Commerce, Justice, and State, the Judiciary, and Related Agencies

Description: Appropriations are one part of a complex federal budget process that includes budget resolutions, appropriations (regular, supplemental, and continuing) bills, rescissions, and budget reconciliation bills. This report is a guide to one of the 13 regular appropriations bills that Congress passes each year. It is designed to supplement information provided by the House and Senate Commerce, Justice, State Appropriations Subcommittees.
Date: October 1, 2002
Creator: Epstein, Susan B.
Partner: UNT Libraries Government Documents Department
open access

Associations of Indoor Carbon Dioxide Concentrations, VOCS, Environmental Susceptibilities With Mucous Membrane and Lower Respiratory Sick Building Syndrome Symptoms in the Base Study: Analyses of the 100 Building Dataset

Description: Using the 100 office-building Building Assessment Survey and Evaluation (BASE) Study dataset, we performed multivariate logistic regression analyses to quantify the associations between indoor minus outdoor CO{sub 2} (dCO{sub 2}) concentrations and mucous membrane (MM) and lower respiratory system (Lresp) Sick Building Syndrome (SBS) symptoms, adjusting for age, sex, smoking status, presence of carpet in workspace, thermal exposure, relative humidity, and a marker for entrained automobile exhau… more
Date: October 2002
Creator: Apte, M. G. & Erdmann, C. A.
Partner: UNT Libraries Government Documents Department
open access

Best Estimate Radiation Flux Value-Added Procedure: Algorithm Operational Details and Explanations

Description: This document describes some specifics of the algorithm for best estimate evaluation of radiation fluxes at Southern Great Plains (SGP) Central Facility (CF). It uses the data available from the three co-located surface radiometer platforms at the SGP CF to automatically determine the best estimate of the irradiance measurements available. The Best Estimate Flux (BEFlux) value-added procedure (VAP) was previously named Best Estimate ShortWave (BESW) VAP, which included all of the broadband and … more
Date: October 1, 2002
Creator: Shi, Y. & Long, C. N.
Partner: UNT Libraries Government Documents Department
open access

Better Understanding Public Perceptions of Risk: Possible Implications for Long-term Environmental Stewardship and Hazardous Waste Management

Description: In the treatment, disposition, and long-term stewardship (e.g., storage) of hazardous waste forms, questions that are of particular concern are: • What is technically feasible and safe, • What is economically affordable, • What is legally mandated and allowable, and • What is publicly acceptable? Although DOE is exerting considerable effort in making sound science-based decisions that are economical and meet legal requirements, it may be lapse in not gaining a better understanding of how public… more
Date: October 1, 2002
Creator: Joe, Jeffrey Clark & Harbour, Gerald Lee
Partner: UNT Libraries Government Documents Department
open access

Blade Manufacturing Improvement Project: Final Report

Description: The Blade Manufacturing Improvement Project explores new, unique and improved materials integrated with innovative manufacturing techniques that promise substantial economic enhancements for the fabrication of wind turbine blades. The primary objectives promote the development of advanced wind turbine blade manufacturing in ways that lower blade costs, cut rotor weight, reduce turbine maintenance costs, improve overall turbine quality and increase ongoing production reliability. Foam Matrix (FM… more
Date: October 2002
Creator: Sherwood, Kent
Partner: UNT Libraries Government Documents Department
open access

Breakthrough in precision (0.3 percent) of neutron activation analyses applied to provenience studies of obsidian

Description: A gamma ray spectrometer at LBNL (the Luis W. Alvarez Iridium Coincidence Spectrometer), that was specifically designed for high sensitivity measurements of iridium abundances, has been significantly modified in order to provide precisions of measurement in neutron activation analysis of obsidian significantly better than previously obtained (about 1%). Repeated measurements on a single sample of obsidian from a deposit near Chivay, Arequipa, Peru, showed a precision (average coefficient of var… more
Date: October 2002
Creator: Asaro, Frank; Stross, Fred H. & Burger, Richard L.
Partner: UNT Libraries Government Documents Department
open access

Building America Field Project: Results for the Consortium for Advanced Residential Buildings (CARB), January to October 2001

Description: This report describes the various projects by the Consortium for Advanced Residential Buildings (CARB) that were active during the first 10 months of 2001, summarizing results, benefits, lessons learned, and future plans. The second part of this report describes technical matters, summarizing innovative technologies, systems engineering and results, and industry team member contributions.
Date: October 2002
Partner: UNT Libraries Government Documents Department
open access

Bursting Frequency Predictions for Compressible Turbulent Boundary Layers

Description: A computational method for the prediction of the bursting frequency associated with the coherent streamwise structures in high-speed compressible turbulent boundary layers is presented. The structures are described as wavelike disturbances of the turbulent mean flow. A direct resonance theory is used to determine the frequency of bursting. The resulting hydrodynamic linear stability equations are discretized by using a Chebyshev collocation method. A global numerical method capable of resolving… more
Date: October 2002
Creator: Liou, William W. & Fang, Yichuan
Partner: UNT Libraries Government Documents Department
open access

C1 Chemistry for the Production of Clean Liquid Transportation Fuels and Hydrogen

Description: Faculty and students from five universities--the University of Kentucky, University of Pittsburgh, University of Utah, West Virginia University, and Auburn University--are collaborating in a research program to develop C1 chemistry processes to produce ultra-clean liquid transportation fuels and hydrogen, the zero-emissions transportation fuel of the future. The feedstocks contain one carbon atom per molecular unit. They include synthesis gas (syngas), a mixture of carbon monoxide and hydrogen … more
Date: 2002-10~
Creator: Huffman, Gerald P.
Partner: UNT Libraries Government Documents Department
open access

Calibration of Seismic Attributes for Reservoir Characterization

Description: The project, ''Calibration of Seismic Attributes for Reservoir Calibration,'' is now complete. Our original proposed scope of work included detailed analysis of seismic and other data from two to three hydrocarbon fields; we have analyzed data from four fields at this level of detail, two additional fields with less detail, and one other 2D seismic line used for experimentation. We also included time-lapse seismic data with ocean-bottom cable recordings in addition to the originally proposed st… more
Date: October 2002
Creator: Pennington, Wayne D.; Acevedo, Horacio; Green, Aaron; Haataja, Joshua; Len, Shawn; Minaeva, Anastasia et al.
Partner: UNT Libraries Government Documents Department
open access

Carbon Dioxide Capture From Flue Gas Using Dry Regenerable Sorbents Quarterly Technical Progress Report: July-September 2002

Description: The objective of this project is to develop a simple and inexpensive process to separate CO{sub 2} as an essentially pure stream from a fossil fuel combustion system using a regenerable sorbent. The sorbents being investigated in this project are primarily alkali carbonates, and particularly sodium carbonate and potassium carbonate, which are converted to bicarbonates through reaction with carbon dioxide and water vapor. Bicarbonates are regenerated to carbonates when heated, producing a nearly… more
Date: October 2002
Creator: Green, David A.; Turk, Brian S.; Portzer, Jeffrey W.; P.Gupta, Raghubir; McMichael, William J.; Liang, Ya et al.
Partner: UNT Libraries Government Documents Department
open access

A Cavity Ringdown Spectroscopy Mercury Continuous Emission Monitor

Description: Work on the Cavity Ring-Down (CRD) mercury spectrometer this past quarter concentrated on the actual detection of mercury and the beginning of flue gas interference testing. After obtaining the initial mercury signal detection was done at various pressures and concentrations. The Alexandrite laser system used for the CRD spectrometer has a narrow enough linewidth to spectrally resolve the isotopic structure of mercury. This includes both isotopic frequency shifts as well as hyperfine splittings… more
Date: October 2002
Creator: Carter, Christopher C.
Partner: UNT Libraries Government Documents Department
open access

Celotex (Registered) Replacement Study

Description: The AL-R8 is the pit storage container in most widespread use at Pantex. The AL-R8 container family consists of standard 20-in.-diameter steel drums, 30 to 60 in. in height, with insulation inserts made of Celotex{reg_sign}--a fiberboard product made from processed sugar cane. Celotex is an acceptable material for inserts in many radioactive material shipping and storage containers. It is a good shock mitigator/insulator, does a fair job in fire protection (when oxygen is excluded), shielding, … more
Date: October 2002
Creator: Couture, S & Hafner, R
Partner: UNT Libraries Government Documents Department
open access

CFD Calculation of Internal Natural Convection in the Annulus between Horizontal Concentric Cylinders

Description: The objective of this heat transfer and fluid flow study is to assess the ability of a computational fluid dynamics (CFD) code to reproduce the experimental results, numerical simulation results, and heat transfer correlation equations developed in the literature for natural convection heat transfer within the annulus of horizontal concentric cylinders. In the literature, a variety of heat transfer expressions have been developed to compute average equivalent thermal conductivities. However, th… more
Date: October 2002
Creator: Francis, N. D., Jr; Itamura, M. T.; Webb, S. W. & James, D. L.
Partner: UNT Libraries Government Documents Department
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