Aircraft radio shop practice. (open access)

Aircraft radio shop practice.

Discusses maintenance and repair of the component parts of aircraft radio equipment, and the correct use of tools.
Date: May 1, 1942
Creator: United States. War Department.
System: The UNT Digital Library
The Advisory Commission on Intergovernmental Relations. (open access)

The Advisory Commission on Intergovernmental Relations.

The ACIR Library is composed of publications that study the interactions between different levels of government. This document addresses the ACIR itself for the year 1967.
Date: May 1, 1967
Creator: United States. Advisory Commission on Intergovernmental Relations.
System: The UNT Digital Library
Environmental impact report (draft) (open access)

Environmental impact report (draft)

The three projects as proposed by Pacific Gas and Electric Company and the environmental analysis of the projects are discussed. Sections on the natural and social environments of the proposed projects and their surrounding areas consist of descriptions of the setting, discussions of the adverse and beneficial consequences of the project, and potential mitigation measures to reduce the effects of adverse impacts. The Environmental Impact Report includes discussions of unavoidable adverse effects, irreversible changes, long-term and cumulative impacts, growth-inducing effects, and feasible alternatives to the project. (MHR)
Date: May 1, 1980
Creator: unknown
System: The UNT Digital Library
Dodge Caravan fact sheet (open access)

Dodge Caravan fact sheet

The U.S. Department of Energy (DOE) is promoting the use of alternative fuels and alternative fuel vehicles (AFVs). The National Renewable Energy Laboratory (NREL) has been directed to conduct projects to evaluate the performance and acceptability of light-duty AFVs. This fact sheet describes the test results on a pair of 1998 Dodge Grand Caravans: a flexible-fuel vehicle (FFVs) operating on E85 (85{percent} ethanol and 15{percent} gasoline) and the other on gasoline only.
Date: May 1, 1999
Creator: National Renewable Energy Laboratory (U.S.)
System: The UNT Digital Library
GMC Sierra fact sheet (open access)

GMC Sierra fact sheet

The U.S. Department of Energy (DOE) is promoting the use of alternative fuels and alternative fuel vehicles (AFVs). The National Renewable Energy Laboratory (NREL) has been directed to conduct projects to evaluate the performance and acceptability of light-duty AFVs. This fact sheet gives the results of tests performed on 1998 GM pickups (GMC Sierra): one bi-fuel CNG and a gasoline model as closely matched as possible.
Date: May 1, 1999
Creator: National Renewable Energy Laboratory (U.S.)
System: The UNT Digital Library
Honda Civic fact sheet (open access)

Honda Civic fact sheet

The U.S. Department of Energy (DOE) is promoting the use of alternative fuels and alternative fuel vehicles (AFVs). The National Renewable Energy Laboratory (NREL) has been directed to conduct projects to evaluate the performance and acceptability of light-duty AFVs. This fact sheet describes the test results on 1998 Honda Civics: one dedicated CNG and a gasoline model as closely matched as possible.
Date: May 1, 1999
Creator: National Renewable Energy Laboratory (U.S.)
System: The UNT Digital Library
Using Distributed Energy Resources, A How-To Guide for Federal Facility Managers (open access)

Using Distributed Energy Resources, A How-To Guide for Federal Facility Managers

The Department of Energy's Federal Energy Management Program (FEMP) established the Distributed Energy Resources (DER) Program to assist Federal agencies in implementing DER projects at their facilities. FEMP prepared this How-To Guide to assist facility managers in evaluating potential applications and benefits. It provides step-by-step advice on how to carry out a Federal DER project. It also describes and explains DER applications and potential benefits in Federal facilities; DER technologies and how to match them to applications; a step-by-step approach to implementing projects; potential barriers and how to overcome them; and resources to assist you in implementing new DER projects.
Date: May 1, 2002
Creator: Distributed Utility Associates
System: The UNT Digital Library
Wind Power Today: Wind Energy Program Highlights 2001 (open access)

Wind Power Today: Wind Energy Program Highlights 2001

Wind Power Today is an annual publication that provides an overview of the U.S. Department of Energy's Wind Energy Program accomplishments for the previous year. The purpose of Wind Power Today is to show how DOE's Wind Energy Program supports wind turbine research and deployment in hopes of furthering the advancement of wind technologies that produce clean, low-cost, reliable energy. Content objectives include: educate readers about the advantages and potential for widespread deployment of wind energy; explain the program's objectives and goals; describe the program's accomplishments in research and application; examine the barriers to widespread deployment; describe the benefits of continued research and development; facilitate technology transfer; and attract cooperative wind energy projects with industry. This 2001 edition of Wind Power Today also includes discussions about wind industry growth in 2001, how DOE is taking advantage of low wind speed regions through advancing technology, and distributed applications for small wind turbines.
Date: May 1, 2002
Creator: unknown
System: The UNT Digital Library
Geothermal Today: 2003 Geothermal Technologies Program Highlights (Revised) (open access)

Geothermal Today: 2003 Geothermal Technologies Program Highlights (Revised)

This outreach publication highlights milestones and accomplishments of the DOE Geothermal Technologies Program for 2003. Included in this publication are discussions of geothermal fundamentals, enhanced geothermal systems, direct-use applications, geothermal potential in Idaho, coating technology, energy conversion R&D, and the GeoPowering the West initiative.
Date: May 1, 2004
Creator: unknown
System: The UNT Digital Library
International Conference on Solar Concentrators for the Generation of Electricity or Hydrogen: Book of Abstracts (open access)

International Conference on Solar Concentrators for the Generation of Electricity or Hydrogen: Book of Abstracts

The International Conference on Solar Concentrators for the Generation of Electricity or Hydrogen provides an opportunity to learn about current significant research on solar concentrators for generating electricity or hydrogen. The conference will emphasize in-depth technical discussions of recent achievements in technologies that convert concentrated solar radiation to electricity or hydrogen, with primary emphasis on photovoltaic (PV) technologies. Very high-efficiency solar cells--above 37%--were recently developed, and are now widely used for powering satellites. This development demands that we take a fresh look at the potential of solar concentrators for generating low-cost electricity or hydrogen. Solar electric concentrators could dramatically overtake other PV technologies in the electric utility marketplace because of the low capital cost of concentrator manufacturing facilities and the larger module size of concentrators. Concentrating solar energy also has advantages for th e solar generation of hydrogen. Around the world, researchers and engineers are developing solar concentrator technologies for entry into the electricity generation market and several have explored the use of concentrators for hydrogen production. The last conference on the subject of solar electric concentrators was held in November of 2003 and proved to be an important opportunity for researchers and developers to share new and crucial information …
Date: May 1, 2005
Creator: McConnell, R.; Symko-Davies, M. & Hayden, H.
System: The UNT Digital Library
Chapter 2: Sustainable and Unsustainable Developments in the U.S. Energy System (open access)

Chapter 2: Sustainable and Unsustainable Developments in the U.S. Energy System

Over the course of the nineteenth and twentieth centuries, the United States developed a wealthy society on the basis of cheap and abundant fossil fuel energy. As fossil fuels have become ecologically and economically expensive in the twenty-first century, America has shown mixed progress in transitioning to a more sustainable energy system. From 2000 to 2006, energy and carbon intensity of GDP continued favorable long-term trends of decline. Energy end-use efficiency also continued to improve; for example, per-capita electricity use was 12.76 MWh per person per year in 2000 and again in 2006, despite 16 percent GDP growth over that period. Environmental costs of U.S. energy production and consumption have also been reduced, as illustrated in air quality improvements. However, increased fossil fuel consumption, stagnant efficiency standards, and expanding corn-based ethanol production have moved the energy system in the opposite direction, toward a less sustainable energy system. This chapter reviews energy system developments between 2000 and 2006 and presents policy recommendations to move the United States toward a more sustainable energy system.
Date: May 1, 2008
Creator: Levine, Mark; Levine, Mark D. & Aden, Nathaniel T.
System: The UNT Digital Library
Chapter 11. Community analysis-based methods (open access)

Chapter 11. Community analysis-based methods

Microbial communities are each a composite of populations whose presence and relative abundance in water or other environmental samples are a direct manifestation of environmental conditions, including the introduction of microbe-rich fecal material and factors promoting persistence of the microbes therein. As shown by culture-independent methods, different animal-host fecal microbial communities appear distinctive, suggesting that their community profiles can be used to differentiate fecal samples and to potentially reveal the presence of host fecal material in environmental waters. Cross-comparisons of microbial communities from different hosts also reveal relative abundances of genetic groups that can be used to distinguish sources. In increasing order of their information richness, several community analysis methods hold promise for MST applications: phospholipid fatty acid (PLFA) analysis, denaturing gradient gel electrophoresis (DGGE), terminal restriction fragment length polymorphism (TRFLP), cloning/sequencing, and PhyloChip. Specific case studies involving TRFLP and PhyloChip approaches demonstrate the ability of community-based analyses of contaminated waters to confirm a diagnosis of water quality based on host-specific marker(s). The success of community-based MST for comprehensively confirming fecal sources relies extensively upon using appropriate multivariate statistical approaches. While community-based MST is still under evaluation and development as a primary diagnostic tool, results presented herein demonstrate its promise. …
Date: May 1, 2010
Creator: Cao, Y.; Wu, C. H.; Andersen, G. L. & Holden, P. A.
System: The UNT Digital Library
Composite Materials under Extreme Radiation and Temperature Environments of the Next Generation Nuclear Reactors (open access)

Composite Materials under Extreme Radiation and Temperature Environments of the Next Generation Nuclear Reactors

In the nuclear energy renaissance, driven by fission reactor concepts utilizing very high temperatures and fast neutron spectra, materials with enhanced performance that exceeds are expected to play a central role. With the operating temperatures of the Generation III reactors bringing the classical reactor materials close to their performance limits there is an urgent need to develop and qualify new alloys and composites. Efforts have been focused on the intricate relations and the high demands placed on materials at the anticipated extreme states within the next generation fusion and fission reactors which combine high radiation fluxes, elevated temperatures and aggressive environments. While nuclear reactors have been in operation for several decades, the structural materials associated with the next generation options need to endure much higher temperatures (1200 C), higher neutron doses (tens of displacements per atom, dpa), and extremely corrosive environments, which are beyond the experience on materials accumulated to-date. The most important consideration is the performance and reliability of structural materials for both in-core and out-of-core functions. While there exists a great body of nuclear materials research and operating experience/performance from fission reactors where epithermal and thermal neutrons interact with materials and alter their physio-mechanical properties, a process that …
Date: May 1, 2011
Creator: Simos, N.
System: The UNT Digital Library
Ion exchange phenomena (open access)

Ion exchange phenomena

Ion exchange phenomena involve the population of readily exchangeable ions, the subset of adsorbed solutes that balance the intrinsic surface charge and can be readily replaced by major background electrolyte ions (Sposito, 2008). These phenomena have occupied a central place in soil chemistry research since Way (1850) first showed that potassium uptake by soils resulted in the release of an equal quantity of moles of charge of calcium and magnesium. Ion exchange phenomena are now routinely modeled in studies of soil formation (White et al., 2005), soil reclamation (Kopittke et al., 2006), soil fertilitization (Agbenin and Yakubu, 2006), colloidal dispersion/flocculation (Charlet and Tournassat, 2005), the mechanics of argillaceous media (Gajo and Loret, 2007), aquitard pore water chemistry (Tournassat et al., 2008), and groundwater (Timms and Hendry, 2007; McNab et al., 2009) and contaminant hydrology (Chatterjee et al., 2008; van Oploo et al., 2008; Serrano et al., 2009).
Date: May 1, 2011
Creator: Bourg, I.C. & Sposito, G.
System: The UNT Digital Library
DEVELOPMENT AND SELECTION OF IONIC LIQUID ELECTROLYTES FOR HYDROXIDE CONDUCTING POLYBENZIMIDAZOLE MEMBRANES IN ALKALINE FUEL CELLS (open access)

DEVELOPMENT AND SELECTION OF IONIC LIQUID ELECTROLYTES FOR HYDROXIDE CONDUCTING POLYBENZIMIDAZOLE MEMBRANES IN ALKALINE FUEL CELLS

Alkaline fuel cell (AFC) operation is currently limited to specialty applications such as low temperatures and pure H{sub 2}/O{sub 2} due to the corrosive nature of the electrolyte and formation of carbonates. AFCs are the cheapest and potentially most efficient (approaching 70%) fuel cells. The fact that non-Pt catalysts can be used, makes them an ideal low cost alternative for power production. The anode and cathode are separated by and solid electrolyte or alkaline porous media saturated with KOH. However, CO{sub 2} from the atmosphere or fuel feed severely poisons the electrolyte by forming insoluble carbonates. The corrosivity of KOH (electrolyte) limits operating temperatures to no more than 80�C. This chapter examines the development of ionic liquids electrolytes that are less corrosive, have higher operating temperatures, do not chemically bond to CO{sub 2}, and enable alternative fuels. Work is detailed on the IL selection and characterization as well as casting methods within the polybenzimidazole based solid membrane. This approach is novel as it targets the root of the problem (the electrolyte) unlike other current work in alkaline fuel cells which focus on making the fuel cell components more durable.
Date: May 1, 2012
Creator: Fox, E.
System: The UNT Digital Library