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Innovative Design Approaches for Large Wind Turbine Blades
The primary goal of the WindPACT Blade System Design Study (BSDS) was investigation and evaluation of design and manufacturing issues for wind turbine blades in the one to ten megawatt size range. The initial project task was to assess the fundamental physical and manufacturing issues that govern and constrain large blades and entails three basic elements: (1) a parametric scaling study to assess blade structure using current technology, (2) an economic study of the cost to manufacture, transport, and install large blades, and (3) identification of promising innovative design approaches that show potential for overcoming fundamental physical and manufacturing constraints. This report discusses several innovative design approaches and their potential for blade cost reduction. During this effort we reviewed methods for optimizing the blade cross-section to improve structural and manufacturing characteristics. We also analyzed and compared a number of composite materials and evaluated their relative merits for use in large wind turbine blades in the range from 30 meters to 70 meters. The results have been summarized in dimensional and non-dimensional format to aid in interpretation. These results build upon earlier parametric and blade cost studies, which were used as a guide for the innovative design approaches explored here.
Date:
March 1, 2003
Creator:
ASHWILL, THOMAS D.
Object Type:
Report
System:
The UNT Digital Library
Electricity: The Road Toward Restructuring
The Public Utility Holding Company Act of 1935 (PUHCA) and the Federal Power Act (FPA) were enacted to eliminate unfair practices and other abuses by electricity and gas holding companies by requiring federal control and regulation of interstate public utility holding companies. Comprehensive energy legislation has passed the House and Senate. The House passed H.R. 6 on April 11, 2003. On July 31, 2003, the Senate suspended debate on S. 14, inserted the text of H.R. 4 (107th Congress) as a substitute, and passed H.R. 6. A conference agreement was reached November 17, 2003, and passed by the House the next day. H.R. 6 includes an electricity title that would, in part, repeal PUHCA, would prospectively repeal the mandatory purchase requirement under PURPA, and would create an electric reliability organization. On June 15, 2004, H.R. 4503, a comprehensive energy policy bill, passed the House.
Date:
March 14, 2003
Creator:
Abel, Amy & Parker, Larry
Object Type:
Report
System:
The UNT Digital Library
Abilene Philharmonic Playbill: March 1-April 26, 2003
Program for an Abilene Philharmonic concert that ran from March 1st to April 26th (classical concerts) during the 52nd season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
March 2003
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
International Law and the Preemptive Use of Force Against Iraq. March 2003
This report examines that issue as developed in customary international law and under the United Nations Charter.
Date:
March 17, 2003
Creator:
Ackerman, David M.
Object Type:
Report
System:
The UNT Digital Library
Public Aid to Faith-Based Organizations (Charitable Choice): Background and Selected Legal Issues
This report provides background on ten selected questions related to public aid for faith-based organization. Despite the ongoing controversy about charitable choice, not until the 107th Congress were there full hearings and extended debates on its constitutionality, efficacy, and public policy implications.
Date:
March 28, 2003
Creator:
Ackerman, David M.
Object Type:
Report
System:
The UNT Digital Library
War Powers Litigation Initiated by Members of Congress Since the Enactment of the War Powers Resolution
None
Date:
March 19, 2003
Creator:
Ackerman, David M.
Object Type:
Report
System:
The UNT Digital Library
Extraction of macro-molecule images in cryo-EM micrographs
Advances in Electron Microscopy and single-particle reconstruction have led to results at increasingly high resolutions. This has opened up the possibility of complete automation of single particle reconstruction. Main bottleneck in automation of single particle reconstruction is manual selection of particles in the micrograph. This paper describes a simple but efficient approach for segmentation of particle projections in the micrographs obtained using cryo-electron microscope. Changing the shape of objects to facilitate segmentation from the cluster and reconstructing its actual shape after isolation is successfully attempted. Both low-level and high-level processing techniques are used and the whole process is made automatic. Over 90 percent success in automatic particle picking is achieved. Several areas for improvement and future research directions are discussed.
Date:
March 20, 2003
Creator:
Adiga, Umesha P.S.; Malladi, Ravi & Glaeser, Robert M.
Object Type:
Report
System:
The UNT Digital Library
Proteomics: Technology and Applications
This meeting took place at the Keystone, Colorado resort from March 25-30, 2003. It was attended by 206 participants, of which 35 were students; 39% of attendees submitted abstracts. The meeting had 30% returning attendees and 70% new attendees. The group of speakers was composed of internationally recruited junior and senior experts in their respective fields. The group included representatives from academia and the private sector, highlights the convergence of proteomics efforts in the two sectors. The completion of the genome sequences of a large number of prokaryotic and eukaryotic species has catalyzed new research approaches to study the structure, function and control of biological processes. They are characterized by the systematic and in many cases quantitative analysis of all the molecules of a particular type expressed by a cell or tissue. The systematic analysis of proteins has been terms ''proteomics''. In an initial phase, most of the proteomics efforts were focused on large-scale protein identification. More recently, the objectives and technologies of proteomics have been diversified and expanded. Current proteomics research attempts to systematically and, where applicable, quantitatively determine the many properties of proteins and their biological function, including: protein abundance, state of modification, specific activity, interaction with other …
Date:
March 25, 2003
Creator:
Aebersold, Ruedi
Object Type:
Report
System:
The UNT Digital Library
Ensemble: 2003-03-29 – 6th Annual African Cultural Festival
Access:
Use of this item is restricted to the UNT Community
Concert presented at Winspear Hall at the Murchison Performing Arts Center
Date:
March 29, 2003
Creator:
Afrikania Cultural Troupe of Denton
Object Type:
Sound
System:
The UNT Digital Library
An infrastructure for passive network monitoring of application data streams
When diagnosing network problems, it is often desirable to have a view of traffic inside the network. In this paper we describe an infrastructure for passive monitoring that can be used to determine which segments of the network are the source of problems for an application data stream. The monitoring hosts are relatively low-cost, off-the-shelf PCs. A unique feature of the infrastructure is secure activation of monitoring hosts in the core of the network without direct network administrator intervention.
Date:
March 1, 2003
Creator:
Agarwal, Deb; Gonzalez, Jose Maria; Jin, Guojun & Tierney, Brian
Object Type:
Article
System:
The UNT Digital Library
The Eastern Statesman (Wilburton, Okla.), Vol. 81, No. 11, Ed. 1 Monday, March 10, 2003
Biweekly student newspaper from Eastern Oklahoma State College in Wilburton, Oklahoma that includes local, state, and campus news along with advertising.
Date:
March 10, 2003
Creator:
Agent, Alicia
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Trade and the Americas
None
Date:
March 20, 2003
Creator:
Ahearn, Raymond J.
Object Type:
Report
System:
The UNT Digital Library
U.S.-European Union Trade Relations: Issues and Policy Challenges
None
Date:
March 21, 2003
Creator:
Ahearn, Raymond J.
Object Type:
Report
System:
The UNT Digital Library
Streamlined Energy-Savings Calculations for Heat-Island Reduction Strategies
We have developed summary tables (sorted by heating- and cooling-degree-days) to estimate the potential of Heat-Island Reduction (HIR) strategies (i.e., solar-reflective roofs, shade trees, reflective pavements, and urban vegetation) to reduce cooling-energy use in buildings. The tables provide estimates of savings for both direct effect (reducing heat gain through the building shell) and indirect effect (reducing the ambient air temperature). In this analysis, we considered three building types that offer the most savings potential : residences, offices, and retail stores. Each building type was characterized in detail by Pre-1980 (old) or 1980+ (new) construction vintage and with natural gas or electricity as heating fuel. We defined prototypical-building characteristics for each building type and simulated the effects of HIR strategies on building cooling and heating energy use and peak power demand using the DOE-2.1E model and weather data for about 240 locations in the U.S. A statistical analysis of previously completed simulations for five cities was used to estimate the indirect savings. Our simulations included the effect of (1) solar-reflective roofing material on building [direct effect], (2) placement of deciduous shade trees near south and west walls of building [direct effect], and (3) ambient cooling achieved by urban reforestation and reflective …
Date:
March 15, 2003
Creator:
Akbari, Hashem & Konopacki, Steven J.
Object Type:
Report
System:
The UNT Digital Library
Smart Screening System (S3) In Taconite Processing
Initial assessment of vibrating fine screens at a taconite processing plant in Mountain Iron Minnesota showed undesirable high noise and vibration levels. This has resulted in lower screening efficiency, higher energy and maintenance cost, and lower productivity and workers safety concerns. Current material separation technology uses heavy electric motors with an unbalance rotating mass to generate the shaking. These motors along with the screens and supporting structure shake other machines and structure in the vicinity of the screens. SmartScreens{trademark} technology, based on smart materials, uses miniaturized motors to generate shaking. This technology, based on Energy Flow Control{trademark} and Vibration Control by Confinement{trademark}, can efficiently and effectively direct the energy flow and confine it to the screens. The SmartScreens{trademark} technology addresses problems related to noise and vibration, screening efficiency, productivity, maintenance cost, and worker safety. Successful development of SmartScreens{trademark} technology will bring drastic change to the screening and physical separation industry. The conceptual designs for SmartScreens{trademark} resonators have been developed. These resonators will be utilized to amplify motion generated by smart motors. Resonator designs are down selected based on the final system requirement and vibration characteristics. The most promising resonator designs are incorporated in the full system model and are analyzed …
Date:
March 1, 2003
Creator:
Allaei, Daryoush; Mohammed, Asim Syed & Tarnowski, David
Object Type:
Report
System:
The UNT Digital Library
Oral History Interview with Abelino Alviar, March 14, 2003
The National Museum of the Pacific War presents an interview with Abelino Alviar. Alviar joined the Army in May of 1944. In early 1945, he joined the 778th Anti-aircraft Artillery Automatic Weapons Battalion. They deployed to Le Havre, France, and traveled to Munich, Germany, arriving after the Battle of the Ardennes. Alviar provided guard duty, and served as a gunner on the half-track supporting the 1st Infantry Division as they fought into Germany. He also worked as a translator and helped transport supplies to the front line. He returned home and was discharged in May of 1946.
Date:
March 14, 2003
Creator:
Alviar, Abelino
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Abelino Alviar, March 14, 2003
The National Museum of the Pacific War presents an interview with Abelino Alviar. Alviar joined the Army in May of 1944. In early 1945, he joined the 778th Anti-aircraft Artillery Automatic Weapons Battalion. They deployed to Le Havre, France, and traveled to Munich, Germany, arriving after the Battle of the Ardennes. Alviar provided guard duty, and served as a gunner on the half-track supporting the 1st Infantry Division as they fought into Germany. He also worked as a translator and helped transport supplies to the front line. He returned home and was discharged in May of 1946.
Date:
March 14, 2003
Creator:
Alviar, Abelino
Object Type:
Text
System:
The Portal to Texas History
Southwest Retort, Volume 55, Number [7], March 2003
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date:
March 2003
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
The Newsletter of the Texas Chapter of the American Fisheries Society, Volume 29, Number 1, Spring 2003
Newsletter of the Texas Chapter of the American Fisheries Society containing information about the organization, membership, and field of aquaculture and ecosystem management.
Date:
March 2003
Creator:
American Fisheries Society. Texas Chapter.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Kalispel Resident Fish Project: Annual Report, 2002.
In 2002 the Kalispel Natural Resource Department (KNRD) continued monitoring enhancement projects (implemented from 1996 to 1998) for bull trout (Salvelinus confluentus), westslope cutthroat (Oncorhynchus clarki lewisi) and largemouth bass (Micropterus salmoides). Additional baseline fish population and habitat assessments were conducted, in 2002, in tributaries to the Pend Oreille River. Further habitat and fish population enhancement projects were also implemented in 2002.
Date:
March 1, 2003
Creator:
Andersen, Todd & Olson, Jason
Object Type:
Report
System:
The UNT Digital Library
Letter to Clara Luper from Ethel Anderson regarding the Department of Corrections Black Heritage Awareness Committee
Letter regarding a fifty dollar donation to the Oklahoma City NAACP for their support.
Date:
March 27, 2003
Creator:
Anderson, Ethel
Object Type:
Letter
System:
The Gateway to Oklahoma History
LOW TEMPERATURE CATHODE SUPPORTED ELECTROLYTES
This report represents a summary of the work carried out on this project which started October 1999 and ended March 2003. A list of the publications resulting from the work are contained in Appendix A. The most significant achievements are: (1) Dense nanocrystalline zirconia and ceria films were obtained at temperatures < 400 C. (2) Nanocrystalline films of both ceria and zirconia were characterized. (3) We showed that under anodic conditions 0.5 to 1 micron thick nanocrystalline films of Sc doped zirconia have sufficient electronic conductivity to prevent them from being useful as an electrolyte. (4) We have developed a process by which dense 0.5 to 5 micron thick dense films of either YSZ or ceria can be deposited on sintered porous substrates which serve as either the cathode or anode at temperatures as low as 400 C. (5) The program has provided the research to produce two PhD thesis for students, one is now working in the solid oxide fuel cell field. (6) The results of the research have resulted in 69 papers published, 3 papers submitted or being prepared for publication, 50 oral presentations and 3 patent disclosures.
Date:
March 31, 2003
Creator:
Anderson, Harlan U.; Dogan, Fatih & Petrovsky, Vladimir
Object Type:
Report
System:
The UNT Digital Library
Coming to Washington, D.C.? Sources of Information on Temporary Housing
This report will introduce a newcomer to the Washington, D.C., metropolitan area to sources of general interest, neighborhoods, housing, and public transportation. The intended audience is congressional staff needing short-term or summer housing, although many of the sources given may also be helpful for those needing more than a three- to six-month lease. Sources suggested are often accessible by their Internet addresses.
Date:
March 20, 2003
Creator:
Anderson, J. Michael
Object Type:
Report
System:
The UNT Digital Library
Enron: A Select Chronology of Congressional, Corporate, and Government Activities
This report presents basic background information on the collapse of the Enron Corporation, identifying public policy issues in financial market oversight. This report briefly summarizes some federal laws carrying criminal penalties which may be implicated in the events surrounding the collapse of the Enron Corp. This report compares the auditing and accounting reform measures passed by the House (H.R. 3763) and reported by the Senate Committee on Banking, Housing, and Urban Affairs. This report compares the major provisions of three auditor and accounting reform proposals: H.R. 3763, S. 2673, and a rule proposed on June 20, 2002, by the SEC that would create a new auditor oversight board by using the SEC’s existing authority to regulate corporate accounting. The report focuses on Section 404(a) of the Employee Retirement Income Security Act (ERISA), the federal statute that regulates employer-sponsored pension plans. Section 404(a) is considered the “touchstone for understanding the scope and object of an ERISA fiduciary’s duties.”
Date:
March 18, 2003
Creator:
Anderson, J. Michael
Object Type:
Report
System:
The UNT Digital Library