Systematics of S- and P-wave radiation widths (open access)

Systematics of S- and P-wave radiation widths

The question of calculating differences in s- and p-wave radiation widths as a valid evaluation tool is explored. A purely statistical approach such as that provided by the Brink-Axel formula depends upon two factors: 1) an adequate description of the giant dipole resonance shape at energies well below the resonance, and 2) an adequate description of the level densities between the ground state and the excitation of the compound nucleus near the neutron separation energy. Some success has been obtained in certain regions of the periodic table with this simple approach, e.g., in the actinides where all nuclei exhibit similar rigid permanent deformations. However, if the method is to be used as a general evaluation procedure throughout the periodic table and particularly in regions where the radiative transition probabilities are enhanced by direct processes, it appears that much more nuclear structure information needs to be incorporated into the calculations.
Date: September 22, 1980
Creator: Moore, M.S.
Object Type: Article
System: The UNT Digital Library
Sensor systems for the Altair Lunar Lander: (open access)

Sensor systems for the Altair Lunar Lander:

The Altair Lunar Lander will enable astronauts to learn to live and work on the moon for extended periods of time, providing the experience needed to expand human exploration farther into the solar system. My overriding recommendation: Use independent and complementary [sometimes referred to as 'orthogonal'] techniques to disambiguate confounding/interfering signals. E.g.: a mass spectrometer ['MS'], which currently serves as a Majority Constituent Analyzer ['MCA'] can be very valuable in detecting the presence of a gaseous specie, so long as it falls on a mass-to-charge ratio ['m/z'] that is not already occupied by a majority constituent of cabin air. Consider the toxic gas, CO. Both N{sub 2} and CO have parent peaks of m/z = 28, and CO{sub 2} has a fragment peak at m/z = 28 [and at 16 and 12], so the N{sub 2} and CO{sub 2} m/z=28 signals could mask low, but potentially-dangerous levels of CO. However there are numerous surface-sensitive CO detectors, as well as tunable-diode-laser-based CO sensors that could provide independent monitoring of CO. Also, by appending a gas chromatograph ['GC'] as the front-end sample processer, prior to the inlet of the MS, one can rely upon the GC to separate CO from N{sub 2} …
Date: December 22, 2009
Creator: Mariella, Raymond, Jr.
Object Type: Report
System: The UNT Digital Library
Molecular architecture of axonemal microtubule doublets revealedby cryo-electron tomography (open access)

Molecular architecture of axonemal microtubule doublets revealedby cryo-electron tomography

The axoneme, which forms the core of eukaryotic flagella and cilia, is one of the largest macromolecular machines with a structure that is largely conserved from protists to mammals. Microtubule doublets are structural components of axonemes containing a number of proteins besides tubulin, and are usually found in arrays of nine doublets arranged around two singlet microtubules. Coordinated sliding of adjacent doublets, which involves a host of other proteins in the axoneme, produces periodic beating movements of the axoneme. We have obtained a 3D density map of intact microtubule doublets using cryo-electron tomography and image averaging. Our map, with a resolution of about 3 nm, provides insights into locations of particular proteins within the doublets and the structural features of the doublets that define their mechanical properties. We identify likely candidates for several of these non-tubulin components of the doublets. This work offers novel insight on how tubulin protofilaments and accessory proteins attach together to form the doublets and provides a structural basis for understanding doublet function in axonemes.
Date: May 22, 2006
Creator: Sui, Haixin & Downing, Kenneth H.
Object Type: Article
System: The UNT Digital Library
Hanford Site Environmental Restoration Program 1994 fiscal year work plan. Work breakdown structure 2.0: Revision 1 (open access)

Hanford Site Environmental Restoration Program 1994 fiscal year work plan. Work breakdown structure 2.0: Revision 1

Site Management System (SMS) guidance requires a Fiscal Year Work Plan (FYWP) to be prepared for the Environmental Restoration (ER) Mission Area and all related programs. This revision is a complete update to cover the FY 1994 time period. This document describes the overall ER Missions Area and provides FYWP appendices for each of the following five program areas: Remedial Action (RA); Decontamination and Decommissioning (D&D); Project Management and Support (PM&S); Surveillance and Maintenance (S&M); and Disposal Facilities (DF).
Date: December 22, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
VHE Gamma-ray Supernova Remnants (open access)

VHE Gamma-ray Supernova Remnants

Increasing observational evidence gathered especially in X-rays and {gamma}-rays during the course of the last few years support the notion that Supernova remnants (SNRs) are Galactic particle accelerators up to energies close to the ''knee'' in the energy spectrum of Cosmic rays. This review summarizes the current status of {gamma}-ray observations of SNRs. Shell-type as well as plerionic type SNRs are addressed and prospect for observations of these two source classes with the upcoming GLAST satellite in the energy regime above 100 MeV are given.
Date: January 22, 2007
Creator: Funk, Stefan
Object Type: Article
System: The UNT Digital Library
Pulsed Neutron Scattering Studies of Strongly Fluctuating solids, Final Report (open access)

Pulsed Neutron Scattering Studies of Strongly Fluctuating solids, Final Report

The conventional description of a solid is based on a static atomic structure with small amplitude so-called harmonic fluctuations about it. This is a final technical report for a project that has explored materials where fluctuations are sufficiently strong to severely challenge this approach and lead to unexpected and potentially useful materials properties. Fluctuations are enhanced when a large number of configurations share the same energy. We used pulsed spallation source neutron scattering to obtain detailed microscopic information about structure and fluctuations in such materials. The results enhance our understanding of strongly fluctuating solids and their potential for technical applications. Because new materials require new experimental techniques, the project has also developed new techniques for probing strongly fluctuating solids. Examples of material that were studied are ZrW2O8 with large amplitude molecular motion that leads to negative thermal expansion, NiGa2S4 where competing interactions lead to an anomalous short range ordered magnet, Pr1- xBixRu2O7 where a partially filled electron shell (Pr) in a weakly disordered environment produces anomalous metallic properties, and TbMnO3 where competing interactions lead to a magneto-electric phase. The experiments on TbMnO3 exemplify the relationship between research funded by this project and future applications. Magneto-electric materials may produce a magnetic …
Date: June 22, 2006
Creator: Broholm, Collin
Object Type: Report
System: The UNT Digital Library
Improved Method for CKM Constraints in Charmless Three-body B and Bs Decays (open access)

Improved Method for CKM Constraints in Charmless Three-body B and Bs Decays

Recently Ciuchini, Pierini and Silvestrini proposed a method for constraining CKM parameters in B {yields} K{pi}{pi} and B{sub s} {yields} K{pi}{pi} through phase measurements of amplitudes involving I = 3/2 K*{pi} final states. We show that complementary information on CKM parameters may be obtained by studying the phases of {Delta}I = 1 B {yields} (K*{pi}){sub I = 1/2}, B{sub s} {yields} (K* {bar K}){sub l=1} and B{sub s} {yields} ({bar K}* K){sub I=1} amplitudes. Hadronic uncertainties in these constraints from electroweak penguin operators O{sub 9} and O{sub 10}, studied using flavor SU(3), are shown to be very small in B {yields} K{pi}{pi} and B{sub s} {yields} K{pi}{pi} and somewhat larger in B{sub s} {yields} K{bar K}{pi}. The first processes imply a precise linear relation between {bar {rho}} and {bar {eta}}, with a measurable slope and an intercept at {bar {eta}} = 0 involving a theoretical error of 0.03. The decays B{sub s} {yields} K{pi}{pi} permit a measurement of involving a theoretical error below a degree. We note that while time-dependence is required when studying B{sup 0} decays at the {Upsilon}(4S), it is not needed when studying B{sub s} decays at hadronic colliders.
Date: September 22, 2006
Creator: Gronau, Michael; /SLAC, /Technion; Pirjol, Dan; /MIT, LNS; Soni, Amarjit; /Brookhaven et al.
Object Type: Article
System: The UNT Digital Library
Deflection and Stress Analysis of the Yankee Core Support Structure (open access)

Deflection and Stress Analysis of the Yankee Core Support Structure

The deflection and stresses of a medel of the Yankee lower core support structure, conslstlng of two clrcular perforated plates joined together by a clrcular reinforclng rib and 76 cylindrical spacers, were obtained experimentally. The relationships between the tests on the model and reference design were determined by an application of dimensional analysis. Experimental investigations are described in which various design parameters were determined and the structural rigidity of the assembly was obtained. A rational methed of semitheoretical analysis of the problem is suggested based on Reissner's small deflectlon theory which takes into account the effect of transverse shear and normal stress deformation. (auth)
Date: September 22, 1958
Creator: Eng, G. H.
Object Type: Report
System: The UNT Digital Library
Criminal Procedure: Brief Summaries of Major Decisions of the "Warren Court" Relating to the Rights of Persons Accused of Crime (open access)

Criminal Procedure: Brief Summaries of Major Decisions of the "Warren Court" Relating to the Rights of Persons Accused of Crime

This report discusses Supreme Court decisions made during the tenure of Earl Warren as Chief Justice from 1953 to 1969 related to criminal procedure and the rights of the accused.
Date: August 22, 1969
Creator: Hutton, E. Jeremy
Object Type: Report
System: The UNT Digital Library
Criminal Procedures: Brief Summaries of Major Decisions of The "Warren Court" Relating to the Rights of Persons Accused of Crime (open access)

Criminal Procedures: Brief Summaries of Major Decisions of The "Warren Court" Relating to the Rights of Persons Accused of Crime

This report is a summary of case holdings that pertain to expanding the rights of people accused of or under investigation for crimes.
Date: August 22, 1969
Creator: Hutton, E. Jeremy
Object Type: Report
System: The UNT Digital Library
Medicaid: Source of Screening Affects Women's Eligibility for Coverage of Breast and Cervical Cancer Treatment in Some States (open access)

Medicaid: Source of Screening Affects Women's Eligibility for Coverage of Breast and Cervical Cancer Treatment in Some States

A letter report issued by the Government Accountability Office with an abstract that begins "Tens of thousands of women die each year from breast or cervical cancer. While screening and early detection through mammograms and Pap tests--followed by treatment--can improve survival, low-income, uninsured women are often not screened. In 1990, Congress authorized the Centers for Disease Control and Prevention (CDC) to fund screening and diagnostic services for such women, which led CDC to establish the National Breast and Cervical Cancer Early Detection Program. The Breast and Cervical Cancer Prevention and Treatment Act of 2000 was also enacted to allow states to extend Medicaid eligibility to women screened under the Early Detection Program and who need breast or cervical cancer treatment. Screened under the program is defined, at a minimum, as screening paid for with CDC funds. GAO examined the Early Detection Program's screening of eligible women, states' implementation of the Treatment Act, Medicaid enrollment and spending under the Treatment Act, and alternatives available to women ineligible for Medicaid under the Treatment Act. To do this, GAO compared CDC data on women screened by the Early Detection Program from 2002 to 2006 with federal estimates of the eligible population, surveyed program …
Date: May 22, 2009
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Lobbying: An Annotated Bibliography (open access)

Lobbying: An Annotated Bibliography

This report is a bibliography that outlines the entire spectrum of lobbying efforts in the United States.
Date: September 22, 1971
Creator: Mulhollan, Daniel P.
Object Type: Report
System: The UNT Digital Library
Dissipative Cryogenic Filters with Zero DC Resistance (open access)

Dissipative Cryogenic Filters with Zero DC Resistance

The authors designed, implemented and tested cryogenic RF filters with zero DC resistance, based on wires with a superconducting core inside a resistive sheath. The superconducting core allows low frequency currents to pass with negligible dissipation. Signals above the cutoff frequency are dissipated in the resistive part due to their small skin depth. The filters consist of twisted wire pairs shielded with copper tape. Above approximately 1 GHz, the attenuation is exponential in {radical}{omega}, as typical for skin depth based RF filters. By using additional capacitors of 10 nF per line, an attenuation of at least 45 dB above 10 MHz can be obtained. Thus, one single filter stage kept at mixing chamber temperature in a dilution refrigerator is sufficient to attenuate room temperature black body radiation to levels corresponding to 10 mK above about 10 MHz.
Date: April 22, 2008
Creator: Bluhm, Hendrik; Moler, Kathryn A. & /Stanford U., Appl. Phys. Dept
Object Type: Article
System: The UNT Digital Library
Legislative reference service (open access)

Legislative reference service

Federal assistance to states and communities for the control of drug abuse
Date: September 22, 1970
Creator: Dempsey, Jean
Object Type: Report
System: The UNT Digital Library
Congress, The President and the War Powers: A Bibliography (open access)

Congress, The President and the War Powers: A Bibliography

This report is a bibliography about the Congress, The president, and the war powers.
Date: September 22, 1975
Creator: Bite, Vita; McHugh, Lois & Wu, Leneice N.
Object Type: Report
System: The UNT Digital Library
Congress, The President and the War Powers: A Bibliography (open access)

Congress, The President and the War Powers: A Bibliography

This report is about Congress, The President and the War Powers.
Date: September 22, 1975
Creator: Bite, Vita & McHugh, Lois
Object Type: Report
System: The UNT Digital Library
Congress, The President and the War Powers: A Bibliography (open access)

Congress, The President and the War Powers: A Bibliography

This report is about Congress, The President and the War Powers
Date: September 22, 1975
Creator: Bite, Vita & McHugh, Lois
Object Type: Report
System: The UNT Digital Library
Flight and Preflight Evaluation of an Automatic Thrust-Coefficient Control System in a Twin-Engine Ram-Jet Missile (open access)

Flight and Preflight Evaluation of an Automatic Thrust-Coefficient Control System in a Twin-Engine Ram-Jet Missile

Report presenting a flight and preflight evaluation of an automatic thrust-coefficient control system in a twin-engine ram-jet missile. A flicker-type single-loop servocontrol system is shown to be a usable way of controlling ram-jet thrust coefficients.
Date: January 22, 1954
Creator: Dettwyler, H. Rudolph & Trout, Otto F., Jr.
Object Type: Report
System: The UNT Digital Library
Sustaining the Landscape: A Method for Comparing Current and Desired Future Conditions of Forest Ecosystems in the North Cumberland Plateau and Mountains (open access)

Sustaining the Landscape: A Method for Comparing Current and Desired Future Conditions of Forest Ecosystems in the North Cumberland Plateau and Mountains

This project initiates an integrated-landscape conservation approach within the Northern Cumberlands Project Area in Tennessee and Kentucky. The mixed mesophytic forests within the Cumberland Plateau and Mountains are among the most diverse in North America; however, these forests have been impacted by and remain threatened from changes in land use across this landscape. The integrated-landscape conservation approach presented in this report outlines a sequence of six conservation steps. This report considers the first three of these steps in two, successive stages. Stage 1 compares desired future conditions (DFCs) and current prevailing conditions (CPCs) at the landscape-scale utilizing remote sensing imagery, remnant forests, and descriptions of historical forest types within the Cumberland Plateau. Subsequently, Stage 2 compares DFCs and CPCs for at-risk forest types identified in Stage 1 utilizing structural, compositional, or functional attributes from USFS Forest Inventory and Analysis data. Ecological indicators will be developed from each stage that express the gaps between these two realizations of the landscape. The results from these first three steps will directly contribute to the final three steps of the integrated-landscape conservation approach by providing guidance for the generation of new conservation strategies in the Northern Cumberland Plateau and Mountains.
Date: December 22, 2004
Creator: Druckenbrod, D. L.
Object Type: Report
System: The UNT Digital Library
The North American Free Trade Agreement (NAFTA) and U.S. Agriculture (open access)

The North American Free Trade Agreement (NAFTA) and U.S. Agriculture

The focus of this report is The U.S. food and agricultural sectors, which has benefited especially from NAFTA.
Date: June 22, 2017
Creator: Johnson, Renée
Object Type: Report
System: The UNT Digital Library
Hanford Atomic Products Operation annual report 1958 (open access)

Hanford Atomic Products Operation annual report 1958

This annual report (1958) from the Hanford Atomic Products Operation. Various programs are briefly described including irradiation processing, fuels preparation, chemical processing, research and development, and supporting operations.
Date: April 22, 1959
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Flight investigation of the effect of control centering springs on the apparent spiral stability of a personal-owner airplane (open access)

Flight investigation of the effect of control centering springs on the apparent spiral stability of a personal-owner airplane

Report presents the results of a flight investigation conducted on a typical high-wing personal-owner airplane to determine the effect of control centering springs on apparent spiral stability. Apparent spiral stability is the term used to describe the spiraling tendencies of an airplane in uncontrolled flight as affected both by the true spiral stability of the perfectly trimmed airplane and by out-of-trim control settings. Centering springs were used in both the aileron and rudder control systems to provide both a positive centering action and a means of trimming the airplane.
Date: March 22, 1951
Creator: Campbell, John P.; Hunter, Paul A.; Hewes, Donald E. & Whitten, James B.
Object Type: Report
System: The UNT Digital Library
Final Report for DOE Project DE-FC07-99CH11010 (open access)

Final Report for DOE Project DE-FC07-99CH11010

Department of Energy award number DE-FC07-99CH11010, Enhanced Utilization of Corn Based Biomaterials, supported a technology development program sponsored by Cargill Dow LLC from September 30, 1999 through June 30, 2003. The work involved fundamental scientific studies on poly lactic acid (PLA), a new environmentally benign plastic material from renewable resources. DOE funds supported academic research at the Colorado School of Mines and the National Renewable Energy Laboratory (NREL), and industry cost share was directed towards applied research into new product development utilizing the fundamental information generated by the academic partners. Under the arrangement of the grant, the fundamental information is published so that other companies can utilize it in evaluating the applicability of PLA in their own products. The overall project objective is to increase the utilization of PLA, a renewable resource based plastic, currently produced from fermented corn sugar.
Date: October 22, 2003
Creator: Randall, Jed & Kean, Robert
Object Type: Report
System: The UNT Digital Library
Naval Postgraduate School Folder - (open access)

Naval Postgraduate School Folder -

Base Input - Naval Postgraduate School Folder - Includes: Support for Combatant Commanders and the Office of the Secretary of Defense; Fact Sheet;
Date: August 22, 2005
Creator: unknown
Object Type: Text
System: The UNT Digital Library