Collection
Office of Scientific & Technical Information Technical Reports
1,392
Texas State Publications
138
Federal Communications Commission Record
114
Defense Base Closure and Realignment Commission
97
Congressional Research Service Reports
83
End of Term Publications
39
Texas Register
37
Congressional Record
33
Government Accountability Office Reports
27
United States Reports
26
10 More
Country
States
Decade
Month
Language
2,043 Matching Results
Results open in a new window/tab. Unexpected Results? Search the Catalog Instead.
Results:
1 - 24 of
2,043
next
Correspondence of the Gardner and van Genuchten/Mualem relativepermeability function parameters
The Gardner and van Genuchten models of relativepermeability are widely used in analytical and numerical solutions toflow problems. However, the applicab ility of the Gardner model to realproblems is usually limited, because empirical relative permeability datato calibrate the model are not routinely available. In contrast, vanGenuchten parameters can be estimated using more routinely availablematric potential and saturation data. However, the van Genuchten model isnot amenable to analytical solutions. In this paper, we introducegeneralized conversion formulae that reconcile these two models. Ingeneral, we find that the Gardner parameter alpha G is related to the vanGenuchten parameters alpha vG and n by alpha G=alpha vG ~; 1:3 n. Thisconversion rule will allow direct recasting of Gardner-based analyticalsolutions in the van Genuchten parameter space. The validity of theproposed formulae was tested by comparing the predicted relativepermeability of various porous media with measured values.
Date:
January 3, 2007
Creator:
Ghezzehei, Teamrat A.; Kneafsey, Timothy J. & Su, Grace W.
Object Type:
Article
System:
The UNT Digital Library
Variational formulation of the Gardner's restacking algorithm
The incompressibility of the phase flow of Hamiltonian wave-plasma interactions restrains the class of realizable wave-driven transformations of the particle distribution. After the interaction, the distribution remains composed of the original phase-space elements, or local densities, which are only rearranged (''restacked'') by the wave. A variational formalism is developed to study the corresponding limitations on the energy and momentum transfer. A case of particular interest is a toroidal plasma immersed in a dc magnetic field. The restacking algorithm by Gardner [Phys. Fluids 6, 839 (1963)] is formulated precisely. The minimum energy state for a plasma with a given current is determined
Date:
April 26, 2004
Creator:
Dodin, I. Y. & Fisch, N. J.
Object Type:
Report
System:
The UNT Digital Library
Measurement of the w and z cross sections in the electron channel for p anti-p collisions at s**(1/2) = 1.96 TeV and extraction of the w total width from the ratio
This dissertation presents measurements of the inclusive production cross sections for W and Z gauge bosons decaying through the electron channel with p{bar p} collisions at a center-of-mass energy of 1.96 TeV. The ratio of these cross sections is then used to extract the W total width. The Standard Model (SM) of electroweak and strong interactions is a collection of theories which together encompass what is currently known about the elementary particles that make up matter and the forces through which they interact. Experimentalists are constantly searching for violations of the Standard Model by making precision measurements of predicted interactions. The decay of the W boson is one such interaction. The rate of its decay is reflected in its width which is predicted to high precision using Standard Model-based calculations. Therefore, a high precision experimental width measurement would be very sensitive to any such violation. In principle the W and Z boson production cross sections could also be good Standard Model tests. However, a precise knowledge of integrated luminosity is required which is unfortunately difficult to obtain at the Tevatron. In fact, the W and Z cross section results can be used to obtain a more precise luminosity measurement. The …
Date:
January 1, 2005
Creator:
Gardner, John Michael
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Identification of Matrix Conditions that Give Rise to the Linear Coupling Resonances
N/A
Date:
March 1, 2009
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Some Useful Linear Coupling Approximations
N/A
Date:
July 1, 2003
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Identification of matrix conditions that give rise to the linear coupling resonances
General definitions of horizontal and vertical amplitudes for linear coupled motion are developed from the normal form of the one-turn matrix. This leads to the identification of conditions on the matrix that give rise to the linear coupling sum and difference resonances. The correspondence with the standard hamiltonian treatment of the resonances is discussed.
Date:
March 1, 2009
Creator:
Gardner,C.J.
Object Type:
Report
System:
The UNT Digital Library
RF Capture Simulation for Gold Ions in AGS
N/A
Date:
October 1, 2000
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
An Algebraic Approach to the Evolution of Emittances upon Crossing the Linear Coupling Difference Resonance
N/A
Date:
September 1, 2008
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Notes on the Acceleration of Iron Ions for the Booster Applications Facility
N/A
Date:
December 1, 2002
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Kicker Pulse Width Requirements for the Injection of Gold Ions into AGS
N/A
Date:
August 1, 2003
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Simulations of Bunch Merging in Booster
N/A
Date:
October 1, 2004
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
The New Booster Dump and Dump Bumps
N/A
Date:
March 1, 2001
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Rigidity Magnetic Field, and Inflector Voltage Based on Frequency Measurements in Booster
N/A
Date:
December 1, 2003
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Multi-turn Injetion of Heavy-Ions in Booster with the H-Minus Injection Foil Inserted
N/A
Date:
September 1, 2001
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Programming the New Sextupole Strings in Booster
N/A
Date:
May 1, 2003
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Notes on the Injection of EBIS Ions into Booster
N/A
Date:
June 1, 2006
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Beam Based Polarity Check of the Booster Sextupole Strings
N/A
Date:
August 1, 2003
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
AGS Injection with an Additional Kicker in the A10 Straight Section
N/A
Date:
September 1, 2005
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Modeling Injection Trajectories on the Midplane of the C5 Dipole in Booster
N/A
Date:
February 1, 2005
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Evidence for the Absence of Gluon Orbital Angular Momentum in the Nucleon
The Sivers mechanism for the single-spin asymmetry in unpolarized lepton scattering from a transversely polarized nucleon is driven by the orbital angular momentum carried by its quark and gluon constituents, combined with QCD final-state interactions. Both quark and gluon mechanisms can generate such a single-spin asymmetry, though only the quark mechanism can explain the small single-spin asymmetry measured by the COMPASS collaboration on the deuteron, suggesting the gluon mechanism is small relative to the quark mechanism. We detail empirical studies through which the gluon and quark orbital angular momentum contributions, quark-flavor by quark-flavor, can be elucidated.
Date:
August 23, 2006
Creator:
Brodsky, S. J. & Gardner, S.
Object Type:
Article
System:
The UNT Digital Library
Calculation of the Mean Energy Loss in the BTA Stripping Foils and Comparison with Measurement
N/A
Date:
July 1, 2002
Creator:
Ahrens, L. & Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Setup and Performance of the Rhic Injector Accelerators for the 2005 Run With Copper Ions.
Copper ions for the 2005 run [1] of the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory (BNL) are accelerated in the Tandem, Booster and AGS prior to injection into RHIC. The setup and performance of these accelerators with copper are reviewed in this paper.
Date:
May 16, 2005
Creator:
Ahrens, L.; Alessi, J. & Gardner, C. J.
Object Type:
Article
System:
The UNT Digital Library
Search for W-prime boson production in the top quark decay channel
We present a search for the production of a new heavy gauge boson W' that decays to a top quark and a bottom quark. We have analyzed 230 pb{sup -1} of data collected with the D0 detector at the Fermilab Tevatron collider at a center-of-mass energy of 1.96 TeV. No significant excess of events is found in any region of the final state invariant mass distribution. We set upper limits on the production cross section of W bosons at the 95% confidence level for several different W' boson masses. We exclude masses below 610 GeV for a W' boson with standard-model-like couplings, below 630 GeV for a W' boson with right-handed couplings that is allowed to decay to both leptons and quarks, and below 670 GeV for a W' boson with right-handed couplings that is only allowed to decay to quarks.
Date:
July 1, 2006
Creator:
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T. et al.
Object Type:
Article
System:
The UNT Digital Library
Search for right-handed W bosons in top quark decay
None
Date:
May 1, 2005
Creator:
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T. et al.
Object Type:
Article
System:
The UNT Digital Library