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Electricity Restructuring Background: Public Utility Holding Company Act of 1935 (PUHCA)
This report provides background information on PUHCA, including its history and impact. It also discusses how PUHCA reform fits into the current electric utility industry restructuring debate. This report will be updated as events warrant. For related information on electricity restructuring, see the CRS Electronic Briefing Book.
Date:
January 7, 1999
Creator:
Abel, Amy
Object Type:
Report
System:
The UNT Digital Library
Measurement of HOMs in the RHIC RF Cavities
The authors present results of Higher Order Modes (HOMs) measurements in the RHIC accelerating (28 MHz system) and storage (197 MHz system) cavities. The power of the excited HOMs deposited into the HOM damper is measured and compared with an analytical calculation of the HOMs power. The quality factors (Q) are also measured and compared to previous measurements.
Date:
January 7, 2009
Creator:
Abreu,N.P. & Choi, E. M.
Object Type:
Report
System:
The UNT Digital Library
Open Charm Yields in d+Au Collisions at sqrt(sNN) = 200 GeV
Mid-rapidity open charm spectra from direct reconstruction of D{sup 0}({bar D}{sup 0}) {yields} K{sup {-+}} {pi}{sup {+-}} in d+Au collisions and indirect electron/positron measurements via charm semileptonic decays in p+p and d+Au collisions at {radical}s{sub NN} = 200 GeV are reported. The D{sup 0}({bar D}{sup 0}) spectrum covers a transverse momentum (p{sub T}) range of 0.1 < p{sub T} < 3 GeV/c whereas the electron spectra cover a range of 1 < p{sub T} < 4 GeV/c. The electron spectra show approximate binary collision scaling between p+p and d+Au collisions. From these two independent analyses, the differential cross section per nucleon-nucleon binary interaction at mid-rapidity for open charm production from d+Au collisions at RHIC is d{sigma}{sub c{bar c}}{sup NN}/dy = 0.30 {+-} 0.04 (stat.) {+-} 0.09(syst.) mb. The results are compared to theoretical calculations. Implications for charmonium results in A+A collisions are discussed.
Date:
January 7, 2005
Creator:
Adams, J.; Aggarwal, M. M.; Ahammed, Z.; Amonett, J.; Anderson, B. D.; Arkhipkin, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Discontinuous finite-element transport solutions in the thick diffusion limit in Cartesian geometry
We analyze the behavior of discontinuous finite-element methods (DFEMs) for problems that contain diffusive regions. We find that in slab geometry most of these methods perform quite well, but that the same is not true in XY or XYZ geometry. In these geometries, we find that there are two distinct sets of DFEMS. Methods in one set produce unphysical solutions in diffusive regions; the other leading-order solutions that satisfy discretizations of the correct diffusion equation. We show that two simple properties of the finite-element weight functions are sufficient to guarantee that a DFEM belongs to the latter set. We show, however, that even these DFEMs suffer from several defects: their leading-order solutions are in general discontinuous, they satisfy diffusion discretizations that can be ill-behaved, and they may not be accurate given boundary layers that are not resolved by the spatial mesh. We discuss the practical significance of these defects, and we show that liberal modification of some DFEMs can eliminate the defects. We present numerical results from simple test problems; these fully agree with our analysis. 15 refs., 6 figs., 1 tab.
Date:
January 7, 1991
Creator:
Adams, M.L.
Object Type:
Article
System:
The UNT Digital Library
Even- and odd-parity finite-element transport solutions in the thick diffusion limit
We analyze the behavior of odd-parity continuous finite-element methods (CFEMs) for problems that contain diffusive regions. We find that each of these method produces a solution that, to leading order inside diffusive regions, satisfies a discretization of the diffusion equation. We find further that these leading-order solutions satisfy boundary conditions that can lead to large errors in the interior solution. We recognize, however, that we can combine an odd-purity CFEM solution and an even-parity CFEM solution and obtain a solution that satisfies very accurate boundary conditions. Our analysis holds in three-dimensional Cartesian geometry, with an arbitrary spatial grid. We give numerical results from slab-geometry; these invariably agree with the predictions of the analysis. Finally, we introduce a rapidly-convergent diffusion-synthetic acceleration scheme for the odd-parity CFEMs, which we believe is new. 18 refs., 3 figs.
Date:
January 7, 1991
Creator:
Adams, M.L.
Object Type:
Article
System:
The UNT Digital Library
Weatherization Assistance Program Technical Assistance Center
The following is a synopsis of the major achievements attributed to the operation of the Weatherization Assistance Program Technical Assistance Center (WAPTAC) by the National Association for State Community Services Programs (NASCSP). During the past five years, the WAPTAC has developed into the premier source for information related to operating the Weatherization Assistance Program (WAP) at the state and local levels. The services provide through WAPTAC include both virtual technical support as well as hands-on training and instruction in classroom and in the field. The WAPTAC achieved several important milestones during its operation including the establishment of a national Weatherization Day now celebrated in most states, the implementation of a comprehensive Public Information Campaign (PIC) to raise the awareness of the Program among policy makers and the public, the training of more than 150 new state managers and staff as they assume their duties in state offices around the country, and the creation and support of a major virtual information source on the Internet being accessed by thousands of staff each month. The Weatherization Assistance Program Technical Assistance Center serves the Department of Energy's (DOE) Office of Weatherization and Intergovernmental Program as a valuable training and technical assistance resource for …
Date:
January 7, 2009
Creator:
Adams, Robert
Object Type:
Report
System:
The UNT Digital Library
Experimental Investigation of In Situ Cleanable HEPA Filters
For the past several years studies have been conducted to investigate the use of innovative, alternative approaches to conventional disposable high efficiency particulate air filters.
Date:
January 7, 1999
Creator:
Adamson, D.J.
Object Type:
Report
System:
The UNT Digital Library
International Trade and Finance: Key Policy Issues for the 112th Congress
This report highlights major international trade and finance issues Congress may address this year.
Date:
January 7, 2011
Creator:
Ahearn, Raymond J.
Object Type:
Report
System:
The UNT Digital Library
International Trade and Finance: Key Policy Issues for the 112th Congress
This report examines the trade relations between the United States, the European Union, and China.
Date:
January 7, 2011
Creator:
Ahearn, Raymond J.
Object Type:
Report
System:
The UNT Digital Library
Vehicle-Wheel
Patent for vehicle wheels/tires and meant to improve upon current models that contain too many operating parts. Patent also contains improvements in performance of tires relating to expansion and contraction of the tires due to temperature.
Date:
January 7, 1919
Creator:
Allan, William N.
Object Type:
Patent
System:
The Portal to Texas History
Machine for Separating Fiber from Stalks.
Patent for a machine that separates fibers from the stalks and leaves of a variety of plants, including ramie, flax, pineapple, and sisal.
Date:
January 7, 1902
Creator:
Allison, Samuel B.
Object Type:
Patent
System:
The Portal to Texas History
Some Considerations on the Configuration and Stability of the H2 Temperature Control Loops of the 80" Bubble Chamber
There is but little known about the thermal process involving the dynamics and thermodynamics of the cycling liquid H2 in the chamber and those of the H2 fluid flow in the cooling coil as well as the geometrical characteristics of the chamber body. This the physical equations governing this process are involving so many variables that this analysis becomes rather complex even if simplifying assumptions are made. To those difficulties is added the ignorance even of an approximative expression for some physical quantities such as film heat transfer coefficients entering as major parameters the process equation.
Date:
January 7, 1964
Creator:
Androulakis, John G.
Object Type:
Report
System:
The UNT Digital Library
Magnetospheric structure of rotation powered pulsars
I survey recent theoretical work on the structure of the magnetospheres of rotation powered pulsars, within the observational constraints set by their observed spindown, their ability to power synchrotron nebulae and their ability to produce beamed collective radio emission, while putting only a small fraction of their energy into incoherent X- and gamma radiation. I find no single theory has yet given a consistent description of the magnetosphere, but I conclude that models based on a dense outflow of pairs from the polar caps, permeated by a lower density flow of heavy ions, are the most promising avenue for future research. 106 refs., 4 figs., 2 tabs.
Date:
January 7, 1991
Creator:
Arons, J. (California Univ., Berkeley, CA (USA) California Univ., Livermore, CA (USA). Inst. of Geophysics and Planetary Physics)
Object Type:
Article
System:
The UNT Digital Library
Relativistic shock waves and the excitation of plerions
The shock termination of a relativistic magnetohydrodynamic wind from a pulsar is the most interesting and viable model for the excitation of the synchrotron sources observed in plerionic supernova remnants. We have studied the structure of relativistic magnetosonic shock waves in plasmas composed purely of electrons and positrons, as well as those whose composition includes heavy ions as a minority constituent by number. We find that relativistic shocks in symmetric pair plasmas create fully thermalized distributions of particles and fields downstream. Therefore, such shocks are not good candidates for the mechanism which converts rotational energy lost from a pulsar into the nonthermal synchrotron emission observed in plerions. However, when the upstream wind contains heavy ions which are minority constituent by number density, but carry the bulk of the energy density, much of the energy of the shock goes into a downstream, nonthermal power law distribution of positrons with energy distribution N(E)dE {proportional to}E{sup {minus}s}. In a specific model presented in some detail, s = 3. These characteristics are close to those assumed for the pairs in macroscopic MHD wind models of plerion excitation. The essential mechanism is collective synchrotron emission of left-handed extraordinary modes by the ions in the shock …
Date:
January 7, 1991
Creator:
Arons, J. (California Univ., Berkeley, CA (USA)); Gallant, Y.A. (California Univ., Berkeley, CA (USA). Dept. of Physics); Hoshino, Masahiro; Max, C.E. (California Univ., Livermore, CA (USA). Inst. of Geophysics and Planetary Physics) & Langdon, A.B. (Lawrence Livermore National Lab., CA (USA))
Object Type:
Article
System:
The UNT Digital Library
Testing Atom and Neutron Neutrality with Atom Interferometry
We propose an atom-interferometry experiment based on the scalar Aharonov-Bohm effect which detects an atom charge at the 10{sup -28} e level, and improves the current laboratory limits by 8 orders of magnitude. This setup independently probes neutron charges down to 10{sup 28} e, 7 orders of magnitude below current bounds.
Date:
January 7, 2008
Creator:
Arvanitaki, Asimina; /Stanford U., ITP /SLAC; Dimopoulos, Savas; Geraci, Andrew A.; Hogan, Jason; Kasevich, Mark et al.
Object Type:
Report
System:
The UNT Digital Library
Magnetism in metal-organic capsules
Nickel and cobalt seamed metal-organic capsules have been isolated and studied using structural, magnetic and computational approaches. Antiferromagnetic exchange in the Ni capsule results from coordination environments enforced by the capsule framework.
Date:
January 7, 2010
Creator:
Atwood, Jerry L.; Brechin, Euan K; Dalgarno, Scott J.; Inglis, Ross; Jones, Leigh F.; Mossine, Andrew et al.
Object Type:
Article
System:
The UNT Digital Library
The Federal Budget: Current and Upcoming Issues
This report provides information about The Current and Upcoming Issues on Federal Budget. The Federal Budget implements congress's " power of the purse".
Date:
January 7, 2009
Creator:
Austin, D. Andrew & Levit, Mindy R.
Object Type:
Report
System:
The UNT Digital Library
Transonic Lateral and Longitudinal Aerodynamic Characteristics of a Lateral-Control System Employing Rotatable Airfoils Mounted Vertically at the Wing Tips of an Unswept Wing-Fuselage-Tail Combination
Report presenting the aerodynamic characteristics of a new type of lateral control through a range of Mach numbers. The control consisted of airfoils mounted vertically at the tips of the wing and could be rotated to induce rolling moments or lift on the wing surface. Results regarding lateral-control characteristics and lift-control characteristics are provided.
Date:
January 7, 1958
Creator:
Axelson, John A.
Object Type:
Report
System:
The UNT Digital Library
Railroad Tie.
Patent for a new and improved railroad-tie. This design "has for its object the provision of means for broadening the gage of a road at curves thereof and the production of a metallic tie that is extremely simple in construction and by means of which a rail can be readily removed or secured in place and a firm elastic bearing obtained thereof" (lines 19-25).
Date:
January 7, 1890
Creator:
Bagby, William Henry
Object Type:
Patent
System:
The Portal to Texas History
High-flux source of fusion neutrons for material and component testing
The inner part of a fusion reactor will have to operate at very high neutron loads. In steady-state reactors the minimum fluence before the scheduled replacement of the reactor core should be at least l0-15 Mw.yr/m<sup>2</sup>. A more frequent replacement of the core is hardly compatible with economic constraints. A most recent summary of the discussions of these issues is presented in Ref. [l]. If and when times come to build a commercial fusion reactor, the availability of information on the behavior of materials and components at such fluences will become mandatory for making a final decision. This makes it necessary an early development and construction of a neutron source for fusion material and component testing. In this paper, we present information on one very attractive concept of such a source: a source based on a so called Gas Dynamic Trap. This neutron source was proposed in the mid 1980s (Ref. [2]; see also a survey [3] with discussion of the early stage of the project). Since then, gradual accumulation of the relevant experimental information on a modest-scale experimental facility GDT at Novosibirsk, together with a continuing design activity, have made initial theoretical considerations much more credible. We believe that …
Date:
January 7, 1999
Creator:
Baldwin, D. E.; Hooper, E. B.; Ryutov, D. D. & Thomassen, K. I.
Object Type:
Article
System:
The UNT Digital Library
Cool-Down Refrigeration Requirements for 80" Bubble Chambers
The purpose of this report is to determine the amount of refrigeration capacity required to cool down the 80" bubble chamber from ambient temperature to liquid hydrogen temperature.
Date:
January 7, 1964
Creator:
Bamberger, J. A.
Object Type:
Report
System:
The UNT Digital Library
General Description of the 80" Bubble Chamber Refrigeration System
Reliability of individual components and the ability to produce refrigeration even if one or two of these components should be in operable are the prime design parameters of this cycle. Each component was looked at with these two parameters in mind and any item that had obvious objections was either rejected or backed up with another piece of equipment. Along this line, you will notice (refer to line schematic) two hydrogen compressors and two nitrogen compressors; for full capacity all are required. However, in the event of the loss of use of one of these compressors, it will still be possible to produce at least 50% of the rated capacity. To eliminate outside influences, the cycle was designed around what may be called a closed cycle cascade system; with the assumption that there is no loss of power, cooling water, the equipment can run indefinitely. The nitrogen and hydrogen cycles are of the Simple Linde type with pre-cooling making use of the Joule-Thompson Effect for the refrigeration produced. The low-temperature components of the cycle have no moving parts other than valves, consisting entirely of counter-flow heat exchangers to lower the temperature of the incoming high-pressure gas to a level where …
Date:
January 7, 1964
Creator:
Bamberger, J. A.; Brown, D. P. & Jensen, J. E.
Object Type:
Report
System:
The UNT Digital Library
Hydrogen Refrigerator Design Capacity for 80" Chamber
When the design of the refrigerator was begun, one of the important parameters was refrigeration capacity required. In order to estimate the required hydrogen refrigeration load the following had to be considered: 1. Dynamic Load due to pulsing of the chamber. Although this has been determined some two years ago through test work, it has not been published as of this date and will be presented here. 2. Static losses due to conduction, radiation, and convection. This is covered by Eng. Note BC-03-0-B. 3. Cool-down requirements. This is covered by Eng. Note BC-03-0-C.
Date:
January 7, 1964
Creator:
Bamberger, J. A.; Brown, D. P. & Jensen, J. E.
Object Type:
Report
System:
The UNT Digital Library
The Strategic Petroleum Reserve: History, Perspectives and Issues
This reports discusses the history and establishment of Strategic Petroleum Reserve (SPR), acquisition of crude oil for the SPR. It talks about the debate over the years regarding when should the SPR be used.
Date:
January 7, 2009
Creator:
Bamberger, Robert
Object Type:
Report
System:
The UNT Digital Library