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245 Matching Results
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Evolution of Primary Hemostasis in Early Vertebrates
Article on the evolution of primary hemostasis in early vertebrates.
Date:
December 23, 2009
Creator:
Kim, Seongcheol; Carrillo, Maira; Kulkarni, Vrinda & Jagadeeswaran, Pudur
Object Type:
Article
System:
The UNT Digital Library
National Airspace System: Regional Airport Planning Could Help Address Congestion If Plans Were Integrated with FAA and Airport Decision Making
A letter report issued by the Government Accountability Office with an abstract that begins "The Federal Aviation Administration (FAA) predicts that the national airspace system will become increasingly congested over time, imposing costs of delay on passengers and regions. While transforming the current air-traffic control system to the Next Generation Air Transportation System (NextGen) may provide additional en route capacity, many airports will still face constraints at their runways and terminals. In light of these forecasts, the Government Accountability Office (GAO) was asked to evaluate regional airport planning in metropolitan regions with congested airports. GAO (1) identified which airports are currently or will be significantly congested and the potential benefits of regional airport planning, (2) assessed how regions with congested airports use regional airport planning in decision making, and (3) identified factors that hinder or aid in the development and implementation of regional airport plans. GAO reviewed studies; interviewed FAA, airport, and other aviation and transportation officials; and conducted case studies in selected regions."
Date:
December 23, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Homeland Security Grant Program Risk-Based Distribution Methods: Presentation to Congressional Committees - November 14, 2008 and December 15, 2008
Correspondence issued by the Government Accountability Office with an abstract that begins "This report formally transmits the briefing in response to P.L. 110-329, the Consolidated Security, Disaster Assistance and Continuing Appropriations Act, that required GAO for the fourth year to review the methodology the Department of Homeland Security (DHS) and the Federal Emergency Management Agency (FEMA) use to allocate Homeland Security Grant Program (HSGP) grants, including the risk assessment methodology they use to determine which urban areas are eligible to apply for grants. HSGP includes the State Homeland Security Program (SHSP) and Urban Areas Security Initiative (UASI) grants. Our objective was to identify any changes in the methodology for risk assessment and grant allocation for 2009 and to assess the reasonableness of the methodology. We analyzed DHS and FEMA documents including the fiscal year 2008 and 2009 risk analysis models and grant guidance and interviewed DHS and FEMA officials about the changes in the 2009 model. We did our work between October and December 2008 in accordance with generally accepted government auditing standards. We briefed the mandated reporting committees with two briefings in November 2008 and December 2008 on the results of our analysis."
Date:
December 23, 2008
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Travel Cards: Control Weaknesses Leave Navy Vulnerable to Fraud and Abuse
A letter report issued by the General Accounting Office with an abstract that begins "Poor oversight and management of DOD's travel card program has led to high delinquency rates, costing DOD millions in lost rebates and increased ATM fees. As a result, the Congress asked GAO to report on (1) the magnitude, impact, and cause of delinquencies, (2) the types of fraudulent and abusive uses of the travel card, and (3) the effectiveness of internal controls over DOD's travel card program. GAO previously reported on travel card management at the Army. This report focuses on travel card management at the Navy, including the Marine Corps."
Date:
December 23, 2002
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Climate Change: Selected Nations' Reports on Greenhouse Gas Emissions Varied in Their Adherence to Standards
A letter report issued by the General Accounting Office with an abstract that begins "In 1992, the United States and other parties, including both developed and developing nations, agreed to try to limit dangerous human interference with the climate by participating in the United Nations Framework Convention on Climate Change. The parties agreed, among other things, to report on their emissions of carbon dioxide and five other gases whose buildup in the atmosphere is believed to affect the climate. The parties developed standards for these reports and processes for periodically evaluating the reports. Expert teams selected by the parties review the developed nations' reports; staff of the Framework Convention's administrative arm (the Secretariat) assess developing nations' reports. GAO agreed to describe the results of the most recent reviews and assessments of reports from selected economically developed and developing nations, as well as the parties' plans to improve the reports. For the developed nations, GAO agreed to study four geographically dispersed nations with high levels of emissions--Germany, Japan, the United Kingdom, and the United States. For the developing nations, GAO studied China, India, and Mexico, which also have high emissions levels and are geographically dispersed. These nations are not representative of …
Date:
December 23, 2003
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Scientific Collections: Mission-Critical Infrastructure for Federal Science Agencies
This report describes the nature and state of federally-held scientific collections which exist for scientific study to provide insight about historical trends in biodiversity, climate, and ecosystems.
Date:
December 23, 2008
Creator:
National Science and Technology Council (U.S.). Committee on Science, Interagency Working Group on Scientific Collections.
Object Type:
Text
System:
The UNT Digital Library
Direct-Cooled Power Electronics Substrate
The goal of the Direct-Cooled Power Electronics Substrate project is to reduce the size and weight of the heat sink for power electronics used in hybrid electric vehicles (HEVs) and plug-in hybrid electric vehicles (PHEVs). The concept proposed in this project was to develop an innovative power electronics mounting structure, model it, and perform both thermal and mechanical finite-element analysis (FEA). This concept involved integrating cooling channels within the direct-bonded copper (DBC) substrate and strategically locating these channels underneath the power electronic devices. This arrangement would then be directly cooled by water-ethylene glycol (WEG), essentially eliminating the conventional heat sink and associated heat flow path. The concept was evaluated to determine its manufacturability, its compatibility with WEG, and the potential to reduce size and weight while directly cooling the DBC and associated electronics with a coolant temperature of 105 C. This concept does not provide direct cooling to the electronics, only direct cooling inside the DBC substrate itself. These designs will take into account issues such as containment of the fluid (separation from the electronics) and synergy with the whole power inverter design architecture. In FY 2008, mechanical modeling of substrate and inverter core designs as well as thermal and …
Date:
December 23, 2008
Creator:
Wiles, R.; Ayers, C. & Wereszczak, A.
Object Type:
Report
System:
The UNT Digital Library
FINAL REPORT: A Study of the Abundance and 13C/12C Ratio of Atmospheric Carbon Dioxide to Advance the Scientific Understanding of Terrestrial Processes Regulating the GCC
The main objective of this project was to continue research to develop carbon cycle relationships related to the land biosphere based on remote measurements of atmospheric CO2 concentration and its isotopic composition. The project continued time-series observations of atmospheric carbon dioxide and isotopic composition begun by Charles D. Keeling at remote sites, including Mauna Loa, the South Pole, and eight other sites. The program also included the development of methods for measuring radiocarbon content in the collected CO2 samples and carrying out radiocarbon measurements in collaboration with Tom Guilderson of Lawrence Berkeley National Laboratory (LLNL). The radiocarbon measurements can provide complementary information on carbon exchange rates with the land and oceans and emissions from fossil-fuel burning. Using models of varying complexity, the concentration and isotopic measurements were used to establish estimates of the spatial and temporal variations in the net CO2 exchange with the atmosphere, the storage of carbon in the land and oceans, and variable isotopic discrimination of land plants.
Date:
December 23, 2008
Creator:
Keeling, R. F. & Piper, S. C.
Object Type:
Report
System:
The UNT Digital Library
A General Methodology for Evaluation of Carbon Sequestration Activities and Carbon Credits
A general methodology was developed for evaluation of carbon sequestration technologies. In this document, we provide a method that is quantitative, but is structured to give qualitative comparisons despite changes in detailed method parameters, i.e., it does not matter what ''grade'' a sequestration technology gets but a ''better'' technology should receive a better grade. To meet these objectives, we developed and elaborate on the following concepts: (1) All resources used in a sequestration activity should be reviewed by estimating the amount of greenhouse gas emissions for which they historically are responsible. We have done this by introducing a quantifier we term Full-Cycle Carbon Emissions, which is tied to the resource. (2) The future fate of sequestered carbon should be included in technology evaluations. We have addressed this by introducing a variable called Time-adjusted Value of Carbon Sequestration to weigh potential future releases of carbon, escaping the sequestered form. (3) The Figure of Merit of a sequestration technology should address the entire life-cycle of an activity. The figures of merit we have developed relate the investment made (carbon release during the construction phase) to the life-time sequestration capacity of the activity. To account for carbon flows that occur during different times …
Date:
December 23, 2002
Creator:
Klasson, KT
Object Type:
Report
System:
The UNT Digital Library
Physical limits for high ion charge states in pulsed discharges in vacuum
Short-pulse, high-current discharges in vacuum were investigated with the goal to maximize the ion charge state number. In a direct extension of previous work [Appl. Phys. Lett. 92, 041502 (2008)], the role of pulse length, rate of current rise, and current amplitude was studied. For all experimental conditions, the usable (extractable) mean ion charge state could not be pushed beyond 7+. Instead, a maximum of the mean ion charge state (about 6+ to 7+ for most cathode materials) was found for a power of 2-3 MW dissipated in the discharge gap. The maximum is the result of two opposing processes that occur when the power is increased: (i) the formation of higher ion charge states, and (ii) a greater production of neutrals (both metal and non-metal), which reduces the charge state via charge exchange collisions.
Date:
December 23, 2008
Creator:
Yushkov, Georgy & Anders, Andre
Object Type:
Article
System:
The UNT Digital Library
Report on the Depth Requirements for a Massive Detector at Homestake
This report provides the technical justification for locating a large detector underground in a US based Deep Underground Science and Engineering Laboratory. A large detector with a fiducial mass greater than 100 kTon will most likely be a multipurpose facility. The main physics justification for such a device is detection of accelerator generated neutrinos, nucleon decay, and natural sources of neutrinos such as solar, atmospheric and supernova neutrinos. The requirement on the depth of this detector will be guided by the rate of signals from these sources and the rate of backgrounds from cosmic rays over a very wide range of energies (from solar neutrino energies of 5 MeV to high energies in the range of hundreds of GeV). For the present report, we have examined the depth requirement for a large water Cherenkov detector and a liquid argon time projection chamber. There has been extensive previous experience with underground water Cherenkov detectors such as IMB, Kamioka, and most recently, Super-Kamiokande which has a fiducial mass of 22 kTon and a total mass of 50 kTon at a depth of 2700 meters-water-equivalent in a mountain. Projections for signal and background capability for a larger and deeper(or shallower) detectors of this …
Date:
December 23, 2008
Creator:
Kadel, Richard W.; Bernstein, Adam; Blucher, Edward; Cline, David B.; Diwan, Milind V.; Fleming, Bonnie et al.
Object Type:
Report
System:
The UNT Digital Library
The Greensheet (Houston, Tex.), Vol. 40, No. 558, Ed. 1 Wednesday, December 23, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
December 23, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 39, No. 554, Ed. 1 Tuesday, December 23, 2008
Free weekly newspaper that includes business and classified advertising.
Date:
December 23, 2008
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 39, No. 553, Ed. 1 Tuesday, December 23, 2008
Free weekly newspaper that includes business and classified advertising.
Date:
December 23, 2008
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 36, No. 550, Ed. 1 Friday, December 23, 2005
Free weekly newspaper that includes business and classified advertising.
Date:
December 23, 2005
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Veterans Benefits: Merchant Seamen
This report will provide a brief overview of seamen of the U.S. merchant marine and World War II, post-war efforts for benefits for merchant seamen, the efforts by merchant seamen for recognition and legislation introduced int he 110th Congress.
Date:
December 23, 2008
Creator:
Scott, Christine & Weimer, Douglas Reid
Object Type:
Report
System:
The UNT Digital Library
Greensheet (Houston, Tex.), Vol. 36, No. 552, Ed. 1 Friday, December 23, 2005
Free weekly newspaper that includes business and classified advertising.
Date:
December 23, 2005
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Mannford Eagle (Mannford, Okla.), Vol. 52, No. 30, Ed. 1 Wednesday, December 23, 2009
Weekly newspaper from Mannford, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 23, 2009
Creator:
Hughes, Dustin
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Cherokeean Herald (Rusk, Tex.), Vol. 160, No. 44, Ed. 1 Wednesday, December 23, 2009
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
December 23, 2009
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
Texas Attorney General Opinion: GA-0287
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification; Whether the seal of a professional engineer licensed in Texas may be placed on engineering plans, specifications, and other documents relating to projects not to be constructed in Texas (RQ-0244-GA)
Date:
December 23, 2004
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: GA-3
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification; authority of the Texas Department of Transporation over construction and maintenance of utility lines along a controlled-access highway (RQ-0563-JC)
Date:
December 23, 2002
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: GA-4
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification; Whether the Euless Economic Development Corporation is "a governmental entity that has the power of eminent domain" under section 272.001(b)(5) of the Local Government Code (RQ-0568-JC)
Date:
December 23, 2002
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: GA-5
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification; Authority of a district attorney pro tem to modify a standing local government between a district attorney's office and a law enforcement agency regarding the distribution of forfeited funds (RQ-0569-JC)
Date:
December 23, 2002
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: GA-6
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification: Whether a member of the legislature who resigns his or her legislative office may, during the term for which he or she was elected, be appointed to a position or office that requires senate confirmation. (RQ-05740JC)
Date:
December 23, 2002
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History