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12,932 Matching Results
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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
Alumni J-TAC, Summer 2000
Alumni magazine of Tarleton State University providing information on events at the school and news about university students, staff, and alumni.
Date:
Summer 2000
Creator:
Tarleton State University
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
John Harbison's The Flight into Egypt: An Analysis for Performance
John Harbison's status as a significant contemporary American composer is confirmed by his numerous appointments, honorary degrees, and awards. He is the recipient of nearly every major composition award, with works performed by major orchestras and in important opera houses spanning the world. This paper examines in detail Harbison's most acclaimed choral work, the 1987 Pulitzer Prize-winning The Flight into Egypt. This study of the score is a "conductor's analysis," offering a musical guide for the conductor who seeks to perform this work. To provide a context for the discussion, Chapter 1 offers a brief biographical sketch of Harbison's life and career. Chapter 2 provides the analysis of the work and includes a history from commission to premier, a discussion of Harbison's selection of text, and an examination of the pitch organization which informs the piece. In Chapter 3, I present important rehearsal and performance implications to consider when undertaking a performance of the work. Interviews with two well-regarded conductors who have performed The Flight into Egypt, David Hoose and Patrick Gardner, and the composer himself, provide valuable insight into this discourse.
Date:
May 2008
Creator:
Galante, Brian Edward, 1974-
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Alumni J-TAC, Summer 2005
Alumni magazine of Tarleton State University providing information on events at the school and news about university students, staff, and alumni.
Date:
Summer 2005
Creator:
Tarleton State University
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
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
The J-TAC (Stephenville, Tex.), Vol. [167], Ed. 1 Thursday, March 11, 2004
Weekly student newspaper from Tarleton State University in Stephenville, Texas that includes local, state and campus news along with advertising.
Date:
March 11, 2004
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The J-TAC (Stephenville, Tex.), Vol. 162, No. 13, Ed. 1 Friday, November 30, 2001
Weekly student newspaper from Tarleton State University in Stephenville, Texas that includes local, state and campus news along with advertising.
Date:
November 30, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History