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Downhole refractive-index logging device. [Patent application]

Description: This invention provides an antenna arrangement for accurately measuring the magnetic permeability of earth formations. It provides a high-resolution coil array of a transmitting coil and six receiving coils to enable self-consistency checks for evaluating tight gas and oil-bearing strata. (DLC)
Date: January 20, 1982
Creator: Yu, J.S.
Partner: UNT Libraries Government Documents Department

W/Z + Jets production at the Tevatron

Description: Both the D0 and CDF experiments at Fermilab Tevatron collider at {radical}s = 1.8 TeV have accumulated over 50pb{sup -1} of data. Each experiment collected more than 50,000 W {yields} l +v and 5000 Z {yields} l + {bar l} candidates for each lepton species (e and {mu}). Using this large data sample of W and Z candidates, the two experiments are actively testing perturbative QCD predictions. Among the studies that are in progress, preliminary results of W/Z+jets characteristics, multiplicity distributions of associated jets, and a study on the determination of the strong coupling constant using the ratio of the W+1 jet to W + 0 jet cross sections are presented.
Date: July 1, 1995
Creator: Yu, J.
Partner: UNT Libraries Government Documents Department

Self and transfer impedances of coaxial coils for interrogating a borehole formation

Description: Analytical models for coaxial-coil logging were improved to permit a self-consistent and accurate evaluation of formation rocks using multiple frequencies within 10 to 100 MHz. For typical borehole diameters up to 20 cm, the inclusion of magnetic-quadrupole coupling allows the self and transfer impedances to be accurately calibrated during design, and self-consistently measured during downhole interrogation. Comprehensive processings of the measurable Z/sub 11/ and Z/sub 21/ are expected to enhance the uniqueness of evaluating the properties of reservoir rocks.
Date: January 1, 1981
Creator: Yu, J. S.
Partner: UNT Libraries Government Documents Department

Atmospheric Photochemistry Studies of Pollutant Emissions from Transportation Vehicles Operating on Alternative Fuels

Description: This project was undertaken with the goal of improving our ability to predict the changes in urban ozone resulting from the widespread use of alternative fuels in automobiles. This report presents the results in detail.
Date: July 1, 1998
Creator: Jeffries, H.; Sexton, K. & Yu, J.
Partner: UNT Libraries Government Documents Department

NuTeV SSQT performance

Description: The NuTeV experiment (E815) took data during the 1996-1997 Fermilab fixed target run. The experiment used the sign-selected-quadrupole- train (SSQT) in its neutrino beamline to choose either a neutrino or an anti- neutrino beam. This note summarizes the performance of the SSQT, as measured by the beamline monitoring devices, the observed {nu}{sub {mu}} and {anti {nu}}{sub {mu}} fluxes, and the upper limit on the wrong sign neutrino contamination.
Date: February 1, 1998
Creator: Yu, J. & NuTeV
Partner: UNT Libraries Government Documents Department

DIS prospects at the future muon collider facility

Description: We discuss prospects of deep inelastic scattering physics capabilities at the future muon collider facility. In addition to {mu}{sup +}{mu}{sup -} collider itself, the facility provides other possibilities. Among the possibilities, we present muon-proton collider and neutrino fixed target programs at the muon collider facility. This {mu}-p collider program extends kinematic reach and luminosity by an order of magnitude, increasing the possibility of search for new exotic particles. Perhaps most intriguing DIS prospects come from utilizing high intensity neutrino beam resulting from continuous decays of muons in various sections of the muon collider facility. One of the most interesting findings is a precision measurement of electroweak mixing angle, sin{sup 2}{theta}{sub W}, which can be achieved to the precision equivalent to {delta}M{sub W}{approximately} 30MeV.
Date: July 1, 1998
Creator: Yu, J., FERMI
Partner: UNT Libraries Government Documents Department

Precision measurement of sin(squared) {theta}{sub W} from {nu}-N scattering at NuTeV and direct measurements of M{sub W}

Description: We present the preliminary result of sin{sup 2}{theta}{sub W} from {nu}-N deep inelastic scattering experiment, NuTeV, at Fermilab. This measurement of sin{sup 2}{theta}{sub W} comes from measuring the Paschos-Wolfenstein parameter R=({sigma}{sup {nu}}{sub NC}-{sigma}{sup {anti {nu}}}{sub NC}), using separate beams of {nu} and {anti {nu}}, utilizing the SSQT. The resulting value of sin{sup 2}{theta}{sub W}{sup on-shell} is 0.2253 {+-} 0.0019(stat) {+-} 0.0010(syst). This value is equivalent to the mass of the W boson, M{sub W} = 80.26 {+-} 0.11 GeV/c{sup 2}. We also summarize the direct measurements of M{sub W} from the Tevatron {anti p}p collider experiments, D0 and CDF. Combining these two direct measurements yields M{sub W} = 80.37 {+-} 0.08 GeV/c{sup 2}.
Date: August 1, 1998
Creator: Yu, J.
Partner: UNT Libraries Government Documents Department

Interstitial dislocation loop nucleation and growth and swelling produced by high-energy cascades

Description: Structural materials for advanced energy sources such as magnetically-and inertially-confined thermonuclear reactors are subjected to a radiation enviornment that produces high-energy displacement cascades and transmutation products that include helium. We address these characteristics and formulate their effect on the microstructural evolution of a material. We consider that, immediately after a high energy cascade event, a vacancy-rich region exists near the primary event site and that an interstitial-rich zone, formed by collision chains, exists some distance from the primary event site. Transmutation-product helium can diffuse into the vacancy-rich zone and stabilize bubble nuclei that will later grow if sufficient vacancies and helium atoms diffuse to the nucleus. These bubbles are the sinks for excess radiation-produced vacancies. The excess radiation-produced interstitials migrate and bond; if the binding energy is high eneough, a di-interstitial is considered to be a stable dislocation-loop nucleus. The loop nuclei grow if they receive more interstitials than vacancies; this represents material swelling since the bubbles do not cause a lattice contraction to offset the dilation caused by the growing dislocation loops.
Date: January 1, 1986
Creator: Yu, J.; Sommer, W.F. & Bradbury, J.N.
Partner: UNT Libraries Government Documents Department

Nonequilibrium statistical theory of bubble nucleation and growth under neutron and proton irradiation

Description: Microstructural evolution in metals under particle irradiation is described by a non-equilibrium statistics method. This method gives a set of equations for the evolution of bubbles and an approximate solution for a distribution function of bubble size as a function of fluence and temperature. The distribution function gives the number of bubbles of radius r at time t, N(r,t)dr, as a function of size, r/r/sub 0/(r/sub 0/ is the radius of a bubble nucleus). It is found that N(r,t)dr increases with fluence. Also, the peak value of N(r,t)dt shifts to higher r/r/sub 0/ with increasing fluence. Nucleation depends mainly on helium concentration and defect cluster concentration while bubble growth is controlled mainly by the vacancy concentration and a fluctuation coefficient. If suitable material parameters are chosen, a reasonable distribution function for bubble size is obtained. The helium diffusion coefficient is found to be less than that for vacancies by five orders of magnitude. The fraction of helium remaining in matrix is less than 10/sup -2/; the majority of the helium is associated with the bubbles.
Date: January 1, 1986
Creator: Yu, J.; Sommer, W.F. & Bradbury, J.N.
Partner: UNT Libraries Government Documents Department

Production of jets in association with W vector bosons in the D0 detector

Description: The D0 detector has accumulating data at the Fermilab Tevatron at {radical}s = 1.8 TeV for several months. In this paper we present the results of an analysis based on 1.1 pb{sup {minus}1} of data. We compare the observed W transverse momentum distributions of W+0jet and W+1jet events with a full D0 detector simulated leading order Monte Carlo. The jet multiplicity distributions associated with W are presented as well as new method of testing NLO QCD predictions and measuring the strong coupling constant {alpha}{sub s}.
Date: March 1, 1993
Creator: Yu, J. & Collaboration, D0
Partner: UNT Libraries Government Documents Department

Two-phase viscoelastic jetting

Description: A coupled finite difference algorithm on rectangular grids is developed for viscoelastic ink ejection simulations. The ink is modeled by the Oldroyd-B viscoelastic fluid model. The coupled algorithm seamlessly incorporates several things: (1) a coupled level set-projection method for incompressible immiscible two-phase fluid flows; (2) a higher-order Godunov type algorithm for the convection terms in the momentum and level set equations; (3) a simple first-order upwind algorithm for the convection term in the viscoelastic stress equations; (4) central difference approximations for viscosity, surface tension, and upper-convected derivative terms; and (5) an equivalent circuit model to calculate the inflow pressure (or flow rate) from dynamic voltage.
Date: December 10, 2008
Creator: Yu, J.-D.; Sakai, S. & Sethian, J. A.
Partner: UNT Libraries Government Documents Department

Ethanol Production for Automotive Fuel Usage

Description: The conceptual design of the 20 million gallon per year anhydrous ethanol facility a t Raft River has been completed. The corresponding geothermal gathering, extraction and reinjection systems to supply the process heating requirement were also completed. The ethanol facility operating on sugar beets, potatoes and wheat will share common fermentation and product recovery equipment. The geothermal fluid requirement will be approximately 6,000 gpm. It is anticipated that this flow will be supplied by 9 supply wells spaced at no closer than 1/4 mile in order to prevent mutual interferences. The geothermal fluid will be flashed in three stages to supply process steam at 250 F, 225 F and 205 F for various process needs. Steam condensate plus liquid remaining after the third flash will all be reinjected through 9 reinjection wells. The capital cost estimated for this ethanol plant employing all three feedstocks is $64 million. If only a single feedstock were used (for the same 20 mm gal/yr plant) the capital costs are estimated at $51.6 million, $43.1 million and $40. 5 million for sugar beets, potatoes and wheat respectively. The estimated capital cost for the geothermal system is $18 million.
Date: January 31, 1980
Creator: Lindemuth, T.E.; Stenzel, R.A.; Yim, Y.J. & Yu, J.
Partner: UNT Libraries Government Documents Department

Ethanol Production for Automotive Fuel Usage

Description: The production of ethanol from potatoes, sugar beet, and wheat using geothermal resources at the Raft River area of idaho is being evaluated. The south central section of Idaho produces approximately 18 million bushels of wheat, 1.3 million tons of sugar beet and 24 million cwt potatoes annually. Based on these production figures, a 20 million gallon/yr ethanol facility has been selected as the largest scale plant that can be supported with the current agricultural resources. The plant will operate on all three feedstocks nominally processing potatoes for five months, sugar beet for four months and wheat for three months of the year. The process facility will use conventional alcohol technology utilizing geothermal fluid at a maximum of 280 F as an energy source. The process flow diagrams for all three feedstocks are currently being prepared. There will be basically three feedstock preparation sections, although the liquefaction and saccharification steps for potatoes and wheat will involve common equipment. The fermentation, distillation and by-product handling sections will be common to all three feedstocks. Three geothermal energy extraction systems were considered to accommodate the energy requirements of the ethanol facility (flashed steam, pressurized fluid and secondary heat transfer). Pressured geothermal fluid with direct heat transfer has been selected as the usage mode to minimize scale deposition. Tentatively, the geothermal supply wells will be laid out in square grids with 1/4 mile spacing. The number of wells required will be determined after the process heat load is calculated.
Date: October 1, 1979
Creator: May, S.C.; Stenzel, R.A.; Weekes, M.C. & Yu, J.
Partner: UNT Libraries Government Documents Department

Demonstration of Silicon Nanocrystalline Lasers and Amplifiers

Description: A Si laser, fabricated using the conventional technologies, would constitute the missing link that has hindered a completely Si-based photonic system. This report summarizes a feasibility study effort to fully characterize a silicon nanocrystal based optical waveguide laser/amplifier.
Date: March 9, 2005
Creator: Yu, J; Page, R H & Simpson, J T
Partner: UNT Libraries Government Documents Department

Field ion microscopy study of depleted zones in tungsten after proton irradiation

Description: Depleted zones in tungsten, that resulted from medium-energy proton irradiations, were studied using the Field Ion Microscope (FIM). The shapes and sizes of depleted zones is an important aspect of basic radiation damage. These data can be compared to models that have been suggested as well as aid development of new models. These depleted volumes are of interest not only for an understanding of basic radiation effects, but also because they affect material properties and can act as nucleation sites for voids or gas bubbles. Depleted zones were produced in annealed tungsten wires by irradiation with 600 to 800 MeV protons at the Los Alamos Meson Physics Facility. The defects observed in the irradiated samples included vacancies, depleted zones, grain boundaries, and dislocations. Single vacancies were the most commonly observed defect. Of the samples ''imaged,'' over 50 depleted zones were found within the area of high resolution in the area between the prominent (112) poles in a (110) oriented sample. The number of layers photographed in each sample was dependent upon the initial shape of the tip and ranged from 60 to 200 (110) sequential layers.
Date: January 1, 1986
Creator: Farnum, D.J.; Sommer, W.F.; Inal, O.T. & Yu, J.
Partner: UNT Libraries Government Documents Department

Strange sea and alpha {sub s} measurements from nu - N deep inelastic scattering at CCFR/NuTeV

Description: We present the latest Next-to-Next-Leading order strong coupling constant, {alpha}{sub s}, extracted from Gross-Llewellyn-Smith sum rule. The value of {alpha}{sub s} from this measurement, at the mass of Z boson, is {alpha}{sub s}{sup NNLO} (M{sup 2}{sub Z}) = 0.114{sup +0.009}{sub -0.012}. We discuss the previous strange sea quark measurement from the CCFR experiment and the prospects for improvements of the measurement in the NuTeV experiment.
Date: August 1, 1998
Creator: Yu, J. & Collaboration, CCFR /NuTeV
Partner: UNT Libraries Government Documents Department

Measurement of sin {sup 2}{Theta}{sub W} at the First Muon Collider

Description: This report summarizes the study of the possibility of measuring sin{sup 2}{theta}{sub W} using the intense neutrino beam expected from the straight sections of the First Muon Collider ring. This study is based on realistic error calculations from the CCFR and the NuTeV experiments. Using a neutrino detector that is capable of identifying and distinguishing electrons and muons, along with a light isoscalar target, it is conceivable to measure sin{sup 2}{theta}{sub W} to the precision equivalent to the W mass uncertainty (experimental) of 30 MeV.
Date: January 1, 1998
Creator: Yu, J. & Kotwal, A.V.
Partner: UNT Libraries Government Documents Department

Experimental results of the active deflection of a beam from a kicker system

Description: A high current kicker has been designed and tested on the ETA-II beam line. A bias dipole which surrounds the kicker acts to deflect the beam in the DC mode. High voltage pulsers (10kV) with fast rise times (10ns) are connected to the internal strip lines of the kicker. They are used to manipulate beams dynamically. Camera photos which show the switching of the beam from one position to another will be presented. Beam bug measurements of beam-induced as well as active steering will be shown. These will be compared with theoretical predictions.
Date: August 20, 1998
Creator: Yu, J
Partner: UNT Libraries Government Documents Department

Production of jets in association with W vector bosons in the D0 detector

Description: The D0 detector has accumulating data at the Fermilab Tevatron at [radical]s = 1.8 TeV for several months. In this paper we present the results of an analysis based on 1.1 pb[sup [minus]1] of data. We compare the observed W transverse momentum distributions of W+0jet and W+1jet events with a full D0 detector simulated leading order Monte Carlo. The jet multiplicity distributions associated with W are presented as well as new method of testing NLO QCD predictions and measuring the strong coupling constant [alpha][sub s].
Date: March 1, 1993
Creator: Yu, J. (State Univ. of New York, Stony Brook, NY (United States))
Partner: UNT Libraries Government Documents Department

Ethanol production for automotive fuel usage. Final technical report, July 1979-August 1980

Description: Production of ethanol from potatoes, sugar beets, and wheat using geothermal resources in the Raft River area of Idaho was evaluated. The south-central region of Idaho produces approximately 18 million bushels of wheat, 1.3 million tons of sugar beets, and 27 million cwt potatoes annually. A 20-million-gallon-per-year ethanol facility has been selected as the largest scale plant that can be supported with the current agricultural resources. The conceptual plant was designed to operate on each of these three feedstocks for a portion of the year, but could operate year-round on any of them. The processing facility uses conventional alcohol technology and uses geothermal energy for all process heating. There are three feedstock preparation sections, although the liquefaction and saccharification steps for potatoes and wheat involve common equipment. The fermentation, distillation, and by-product handling sections are common to all three feedstocks. Maximum geothermal fluid requirements are approximately 6000 gpm. It is anticipated that this flow will be supplied by nine production wells located on private and BLM lands in the Raft River KGRA. The geothermal fluid will be flashed from 280/sup 0/F in three stages to supply process steam at 250/sup 0/F, 225/sup 0/F, and 205/sup 0/F for various process needs. Steam condensate plus liquid remaining after the third flash will be returned to receiving strata through six injection wells.
Date: August 1, 1980
Creator: Stenzel, R.A.; Yu, J.; Lindemuth, T.E.; Soo-Hoo, R.; May, S.C.; Yim, Y.J. et al.
Partner: UNT Libraries Government Documents Department

High temperature hydrogen sulfide removal with stannic oxide

Description: This contract focuses on the development of sorbents and processes for removal of H{sub 2}S from hot coal gas with the product of sorbent regeneration being elemental sulfur. TDA Research`s process uses a regenerable tin(IV) oxide-based (SnO{sub 2}) sorbent as the first sorbent and zinc ferrite (or zinc titanate) as a second sorbent.
Date: October 1, 1994
Creator: Karpuk, M. E.; Copeland, R. J.; Feinberg, D.; Wickham, D.; Windecker, B. & Yu, J.
Partner: UNT Libraries Government Documents Department

High temperature hydrogen sulfide removal with tin oxide

Description: The system is based on the absorption of hydrogen sulfide (H{sub 2}S) by stannic (tin) oxide. Two sorbents are required, the first sorbent is tin oxide and the second sorbent is a zinc oxide based material (i.e., zinc ferrite or zinc titanate) which is regenerated by air producing SO{sub 2}. TDA`s process carries out a modified Claus reaction to reduce the SO{sub 2} from the second sorbent generation to elemental sulfur. In this case the sulfided stannic oxide forms stannous sulfide (SnS) which reduces the SO{sub 2}. The absorption by SnO{sub 2} could remove over 90% of the H{sub 2}S from typical coal gas streams, but we use zinc ferrite (or zinc titanate), (a) to reduce H{sub 2}S to less than 20 ppM and (b) as a source of SO{sub 2} in regeneration. Due to stoichiometry of regeneration we want to remove half of the H{sub 2}S by SnO{sub 2} and the remainder by the second sorbent. The reactions with stannic oxide minimize the heat released during H{sub 2}S removal and regeneration. The absorption by SnO{sub 2} is slightly endothermic and cools the gas stream by less that 5{degrees}F (2.8{degrees}C) during absorption. Regeneration with SO{sub 2} is exothermic but releases only 11% of the heat that is liberated in regenerating the ZnO. For a nominal 6.5:1 steam to air the regeneration of ZnO increases the temperature by {approx_equal}400{degrees}F. The regeneration of SnO{sub 2} increases the temperature by less than 50{degrees}F (28{degrees}C) in the same gas flow.
Date: September 1, 1993
Creator: Karpuk, M. E.; Copeland, R. J.; Feinberg, D.; Wickham, D.; Windecker, B. & Yu, J.
Partner: UNT Libraries Government Documents Department