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Prospects for top at CDF
During the next two years, the Fermilab Tavatron is expected to deliver approximately 100pb{sup {minus}1} of integrated luminosity. We describe improvements to the CDF detector since the 1988--89 collider run and discuss the prospects for the discovery of the top quark during the 1992--93 collider runs.
Date:
June 3, 1992
Creator:
Gerdes, D. (Chicago Univ., IL (United States))
Object Type:
Article
System:
The UNT Digital Library
CDF: Recent results and future prospects
We present recent results from the Collider Detector at Fermilab. Searches for the top quark have established a lower bound of M{sub top} > 91 GeV/c{sup 2} (at 95% confidence level). A measurement of B{sup o}{bar B}{sup o} mixing has been obtained from b{bar b} {yields} e{mu}, ee events. Measurements of b-quark production have been obtained from e + X events and J/{psi} + K events. The mass of the W boson has been determined to be M{sub W} = 79.91 {plus minus} 0.39 GeV/c{sup 2}. In searching for new gauge bosons, we have obtained the bounds M{sub Z{prime}} > 412 GeV/c{sup 2} and M{sub W{prime}} > 520 GeV/c{sup 2} (at 95% C.L.). The lower limits on the quark and lepton compositeness scales are 1.4 TeV. In the next two years of data collection, we expect significantly more events for numerous types of physics, due to 25 times more beam luminosity, and improvement to the detector. In the longer term, the Main Injector'' upgrade to the accelerator, further improvements to the detector are being planned to exploit the potentials for physics. We discuss prospects for the discovery of the top quark, precise measurement of properties of b quark, and searches …
Date:
March 3, 1992
Creator:
Yeh, G.P.
Object Type:
Article
System:
The UNT Digital Library
Parameterization of convective clouds, mesoscale convective systems, and convective-generated cirrus
A level 2.5w deep convection updraft/downdraft parameterization scheme has been refined and tested against 3D simulations of sea-breeze generated convection over S. Florida. Cases for explicit simulation of MCSs in mid-latitudes and tropics have been encouraging. After a few refinements in those cases, fine resolution explicit simualtions of deep convection and mesoscale, stratiform clouds will be begun.
Date:
March 3, 1992
Creator:
Cotton, W.R.
Object Type:
Report
System:
The UNT Digital Library
[RE: April Grant Deadline]
Photocopy of a memorandum from Herbert Holl, executive director for the Greater Denton Arts Council, to William McCarter and Jack Davis, co-directors of North Texas Institute for Educators on the Visual Arts. The memo is in regards to the Art council grant deadline for April 1, 1992.
Date:
March 3, 1992
Creator:
Holl, Herbert
Object Type:
Letter
System:
The UNT Digital Library
Meeting Record for FFA Working Meeting of November 15, 1991
This document provides a meeting record of the Federal Facility Agreement (FFA) working meeting to discuss progress on old issues and further required actions regarding environmental impacts of the Savannah River Facility. (FI)
Date:
January 3, 1992
Creator:
Stejskal, G. F.
Object Type:
Report
System:
The UNT Digital Library
Measurements of the. beta. function near the B0 interaction point
To successfully provide beam to experiments from the Tevatron requires that we be able to perform many distinct operations on the internal accelerator beam. These include injecting beam, correcting the orbit, accelerating and then squeezing or extracting the beam. To perform many of these operations we depend on a knowledge of the lattice functions at various points in the lattice. The values of the lattice functions used in calculating the value for a bump or for the setting of a corrector come from a computer model of the Tevatron. If the model does not give the correct values of the lattice functions then the desired operation may not be performed correctly. It is therefore important that we be able to experimentally verify our model of the Tevatron. With the installation of the new low-{Beta} magnets at B0, and the modifications of the lattice at D0, it is necessary that we measure the {beta} functions at different locations in the lattice and compare them with the values calculated from our model.
Date:
March 3, 1992
Creator:
Gelfand, N.M.
Object Type:
Report
System:
The UNT Digital Library
Basic Questions on U.S. Citizenship and Naturalization
U.S. citizenship is conferred at birth under the principle of jus soli (nationality of place of birth) and the principle of jus sanguinis (nationality of parents). The U.S. Constitution states as a fundamental rule of jus soli citizenship that "all persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside." The exceptions to universal citizenship comprehended by the requirement that a person be born "subject to the jurisdiction thereof" include: (1) children born to a foreign sovereign or accredited diplomatic official; (2) children born on a foreign public vessel, such as a warship; (3) children born to an alien enemy in hostile occupation; and (4) native Indians.
Date:
March 3, 1992
Creator:
Eig, Larry M.
Object Type:
Report
System:
The UNT Digital Library
[Press release: Hamilton Jordan and Edward Rollins on Ross Perot's campaign]
Press release announcing staff additions to Ross Perot's presidential campaign.
Date:
June 3, 1992
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[Press Release: Movement's experts to present spectrum of issues at Creating Change in November]
A press release from the National Gay and Lesbian Task Force announcing their panels and topics for the Creative Change Conference.
Date:
September 3, 1992
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
[Press Release: Lesbian/ Gay Rights Lobby of Texas]
2 p. ; 28 cm.
Date:
December 3, 1992
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[Press release: NGLTF dispatches key organizer to fight the right in Oregon]
Press release reporting on the NGTLF's efforts against the anti-gay initiatives in Oregon legislation.
Date:
September 3, 1992
Creator:
National Gay and Lesbian Task Force]
Object Type:
Text
System:
The UNT Digital Library
[Fax: Election update]
A fax from William Waybourn, at the Gay and Lesbian Victory Fund, to Dennis Vercher providing an election update.
Date:
November 3, 1992
Creator:
Gay and Lesbian Victory Fund
Object Type:
Text
System:
The UNT Digital Library
[Press release: Gays and lesbian push visibility on outside of GOP convention]
Press release reporting on gay and lesbian political presence at the Republican National Convention in 1992.
Date:
September 3, 1992
Creator:
National Gay and Lesbian Task Force (U.S.)
Object Type:
Text
System:
The UNT Digital Library
[Press release: Eight artists win fellowships from national fund for lesbian/gay artists]
Press release announcing the winners of eight one-thousand dollar fellowships for the production of lesbian/gay art.
Date:
February 3, 1992
Creator:
Highways Performance Space
Object Type:
Text
System:
The UNT Digital Library
The Tulia Herald (Tulia, Tex.), Vol. 84, No. 36, Ed. 1 Thursday, September 3, 1992
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
September 3, 1992
Creator:
Reynolds, Jim
Object Type:
Newspaper
System:
The Portal to Texas History
The Tulia Herald (Tulia, Tex.), Vol. 84, No. 49, Ed. 1 Thursday, December 3, 1992
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
December 3, 1992
Creator:
Reynolds, Jim
Object Type:
Newspaper
System:
The Portal to Texas History
Bogata News (Bogata, Tex.), Vol. 81, No. 42, Ed. 1 Thursday, September 3, 1992
Weekly newspaper from Bogata, Texas that includes local, state, and national news along with advertising.
Date:
September 3, 1992
Creator:
Nichols, Nanalee & Nichols, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
Bogata News (Bogata, Tex.), Vol. 82, No. 3, Ed. 1 Thursday, December 3, 1992
Weekly newspaper from Bogata, Texas that includes local, state, and national news along with advertising.
Date:
December 3, 1992
Creator:
Nichols, Nanalee & Nichols, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
Clean, premium-quality chars: Demineralized and carbon enriched
The goal of this project is to develop a bench-scale procedure to produce clean, desulfurized, premium-quality chars from the Illinois basin coals. This goal is achieved by utilizing the effective capabilty of smectites in combination with methane to manipulate the char yields. The major objectives are: to determine the optimum water- ground particle size for the maximum reduction of pyrite and minerals by the selective-bitumen agglomeration process; to evaluate the type of smectite and its interlamellar cation which enhances the premium-quality char yields; to find the mode of dispersion of smectites in clean coal which retards the agglomeration of char during mild gasification; to probe the conditions that maximize the desulfurized clean-char yields under a combination of methane+oxygen or helium+oxygen; to characterize and accomplish a material balance of chars, liquids, and gases produced during mild gasification; to identify the conditions which reject dehydrated smectites from char by the gravitational separation technique; and to determine the optimum seeding of chars with polymerized maltene for flammability and transportation.
Date:
January 3, 1992
Creator:
Smith, G.V.
Object Type:
Report
System:
The UNT Digital Library
Crystalline-amorphous interfaces and their relation to grain boundary films
In presence of glass in grain boundaries greatly enhances sintering, in part, because transport of matter along and across the intergranular regions is faster. The glass does not simply act as a catalyst but also changes the character of the interfacial regions. In particular, it tends to encourage faceting of the grains; the scale of this faceting may vary from nanometers to microns. After processing, the glass may remain as a thin layer in the interface during preparation of the polycrystalline compact as was initially demonstrated for Si{sub 3}N{sub 4} and proposed for other ceramics. The glass may also crystallize to form an intergranular crystalline layer or it may withdraw from the planar interfaces into three-grain and four-grain junctions (the dewetting process). The present program has begun to examine how glass affects and interacts with crystalline ceramics. The main aim of the program is to examine how glass moves into and out of grain boundaries and why this movement takes. By understanding this process we will be better able to control this important aspect of many ceramic materials. Since TEM is the main tool used in this investigation, we will continue to develop methods for analyzing interfaces as part of …
Date:
February 3, 1992
Creator:
Carter, C.B. (Minnesota Univ., Minneapolis, MN (United States). Dept. of Chemical Engineering and Materials Science)
Object Type:
Report
System:
The UNT Digital Library
Model catalytic oxidation studies using supported monometallic and heterobimetallic oxides
This research program is directed toward a more fundamental understanding of the effects of catalyst composition and structure on the catalytic properties of metal oxides. Metal oxide catalysts play an important role in many reactions bearing on the chemical aspects of energy processes. Metal oxides are the catalysts for water-gas shift reactions, methanol and higher alcohol synthesis, isosynthesis, selective catalytic reduction of nitric oxides, and oxidation of hydrocarbons. A key limitation to developing insight into how oxides function in catalytic reactions is in not having precise information of the surface composition under reaction conditions. To address this problem we have prepared oxide systems that can be used to study cation-cation effects and the role of bridging (-O-) and/or terminal (=O) surface oxygen anion ligands in a systematic fashion. Since many oxide catalyst systems involve mixtures of oxides, we selected a model system that would permit us to examine the role of each cation separately and in pairwise combinations. Organometallic molybdenum and tungsten complexes were proposed for use, to prepare model systems consisting of isolated monomeric cations, isolated monometallic dimers and isolated bimetallic dimers supported on silica and alumina. The monometallic and bimetallic dimers were to be used as models of …
Date:
February 3, 1992
Creator:
Ekerdt, J. G.
Object Type:
Report
System:
The UNT Digital Library
Innovative Clean Coal Technology (ICCT): 500 MW demonstration of advanced wall-fired combustion techniques for the reduction of nitrogen oxide (NO sub x ) emissions from coal-fired boilers
This quarterly report discusses the technical progress of an Innovative Clean Coal Technology (ICCT) demonstration of advanced wall-fired combustion techniques for the reduction of nitrogen oxide (NO{sub x}) emissions from coal-fired boilers. The project is being conducted at Georgia Power Company's Plant Hammond Unit 4 located near Rome, Georgia. The primary goal of this project is the characterization of the low NO{sub x} combustion equipment through the collection and analysis of long-term emissions data. A target of achieving fifty percent NO{sub x} reduction using combustion modifications has been established for the project. The project provides a stepwise retrofit of an Advanced Overfire Air (AOFA) system followed by Low NO{sub x} Burners (LNB). During each test phase of the project, diagnostic, performance, long-term, and verification testing will be performed. These tests are used to quantify the NO{sub x} reductions of each technology and evaluate the effects of those reductions on other combustion parameters such as particulate characteristics and boiler efficiency.
Date:
February 3, 1992
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Electronic transport and mixed conductivity in perovskite type oxides
The goal of the investigation presented in this report is to study the inter-relationship between electrical conductivity, oxidation-reduction kinetics, defect structure, and composition of n- and p-type binary and ternary transition metal oxides. The experimental part of the investigation included specimen preparation, thermogravimetric measurements, X-ray diffraction, thermally stimulated current, DTA/TGA, optical absorption, transmission electron microscopy, electrical conductivity, and Seebeck measurements. The systems studied or being studied are LaMnO{sub 3}-LaCrO{sub 3}-LaCrO{sub 3}, (La,Ca)(Mn,Al)O{sub 3}, Y{sub 1-x}Ca{sub x}CrO{sub 3}, YMnO{sub 3}-CaMnO{sub 3}, and LaMnO{sub 3}-CaMnO{sub 3}.
Date:
March 3, 1992
Creator:
Anderson, H. U.; Nasrallah, M. M.; Sparlin, D. M. & Parris, P. E.
Object Type:
Report
System:
The UNT Digital Library
Innovative Clean Coal Technology (ICCT): 180 MW demonstration of advanced tangentially-fired combustion techniques for the reduction of nitrogen oxide (NO sub x ) emissions from coal-fired boilers
This quarterly report discusses the technical progress of a US Department of Energy (DOE) Innovative Clean Coal Technology (ICCT) Project demonstrating advanced tangentially-fired combustion techniques for the reduction of nitrogen oxide (NO{sub x}) emissions from a coal-fired boiler. The project is being conducted at Gulf Power Company's Plant Lansing Smith Unit 2 located near Panama City, Florida. The primary objective of this demonstration is to determine the long-term effects of commercially available tangentially-fired low NO{sub x} combustion technologies on NO{sub x} emissions and boiler performance. A target of achieving fifty percent NO{sub x} reduction using combustion modifications has been established for the project.
Date:
February 3, 1992
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library