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[News Script: Samuelson]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story about the American oil executive who has been released by his guerilla kidnappers.
Date:
April 29, 1974, 10:00 p.m.
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
[News Script: People]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story about secretary of state, Kissinger who told that 100 congressional wives has more problems dealing with America' s friends and allies.
Date:
March 11, 1974, 10:00 p.m.
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
Oral History Interview with Xergio Chacin, October 22, 2015
Access:
Use of this item is restricted to the UNT Community
Transcript of an interview with Xergio Chacin, Director of Immigration Services for Catholic Charities of Fort Wort. Chacin discusses his work as the Director and the the services provided for the community, particularly for Dreamers, and his thoughts on immigration issues.
Date:
October 22, 2015
Creator:
Fowler, Mike & Chacin, Xergio, 1952-
Object Type:
Book
System:
The UNT Digital Library
[News Script: National life and death news]
Photocopy of a script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.
Date:
May 22, 1970, 6:30 a.m.
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
Ensemble Recital: 1999-04-15 - The Zebras
Access:
Use of this item is restricted to the UNT Community
A jazz recital performed at the UNT College of Music Kenton Hall.
Date:
April 15, 1999
Creator:
University of North Texas. The Zebras.
Object Type:
Sound
System:
The UNT Digital Library
Finite sparse matrix techniques. [Solution of linear systems Ax = b]
A unified theory of finite sparse matrix techniques based on a literature search and new results is presented. It is intended to aid in computational work and symbolic manipulation of large sparse systems of linear equations. The theory relies on the bijection property of bipartite graph and rectangular Boolean matrix representation. The concept of perfect elimination matrices is extended from the classification under similarity transformations to that under equivalence transformations with permutation matrices. The reducibility problem is treated with a new and simpler proof than found in the literature. A number of useful algorithms are described. The minimum deficiency algorithms are extended to the new classification, where the latter required a different technique of proof. 13 figures, 7 tables.
Date:
November 1, 1979
Creator:
Bareiss, E.H. & de Peniza, C.M.
Object Type:
Report
System:
The UNT Digital Library
Carta esferica del mar de las Antillas y de las costas de Tierra Firme, desde la isla de Trinidad, hasta el golfo de Honduras.
Map shows coastline along the North Pacific Ocean and the Gulfs of Honduras, Panamá, and Maracaybo for Central America, the northeast coast of South America and the a portion of the Antilles. Includes the Caribbean Sea, the Islands of Jamaica, Puerto Rico, Guadalupe, Antigua, and Santo Domingo; Provinces of Panamá, Yucatán, Nicaragua, Veragua, Biruquete, Venezuela, Caracas, and Cumaná; Governments of Cartagena and St. Marta and notes. Insets: "Plano de la Boca del Golfo de Cariaco y del fondeadero de Cumaná Levantado en 1793" and "Plano del fondeadero de Truxillo." Relief shown by hachures. Depths shown by soundings. Scale [ca. 1:3,700,000].
Date:
1809
Creator:
Spain. Dirección de Hidrografía.
Object Type:
Map
System:
The Portal to Texas History
Nuclear modeling for applications in medical radiation therapy and accelerator-driven technologies
An understanding of the interactions of neutrons and protons below a few hundred MeV with nuclei is important for a number of applications. In this paper, two new applications are discussed: radiation transport calculations of energy deposition in fast neutron and proton cancer radiotherapy to optimize the dose given to a tumor; and intermediate-energy proton accelerators which are currently being designed for a range of applications including the destruction of long-lived radioactive nuclear waste. We describe nuclear theory calculations of direct, preequilibrium, and compound nucleus reaction mechanisms important for the modeling of these systems.
Date:
June 1, 1995
Creator:
Chadwick, M.B.
Object Type:
Article
System:
The UNT Digital Library
Low-Density Ionization Behavior
As part of a continuing study of the physics of matter under extreme conditions, I give some results on matter at extremely low density. In particular I compare a quantum mechanical calculation of the pressure for atomic hydrogen with the corresponding pressure given by Thomas-Fermi theory. (This calculation differs from the ``confined atom`` approximation in a physically significant way.) Since Thomas-Fermi theory in some sense, represents the case of infinite nuclear charge, these cases should represent extremes. Comparison is also made with Saha theory, which considers ionization from a chemical point of view, but is weak on excited-state effects. In this theory, the pressure undergoes rapid variation as electron ionization levels are passed. This effect is in contrast to the smooth behavior of the Thomas-Fermi fixed temperature, complete ionization occurs in the low density limit, I study the case where the temperature goes appropriately to zero with the density. Although considerable modification is required, Saha theory is closer to the actual results for this case than is Thomas-Fermi theory.
Date:
April 1, 1995
Creator:
Baker, G. A., Jr.
Object Type:
Article
System:
The UNT Digital Library
Soil Remediation Test
Soils contaminated with petroleum by-products can now be effectively remediated using a variety of technologies. Among these are in-situ bioremediation, land farming, and landfill/replacing of soil. The range of efficiencies and cost effectiveness of these technologies has been well documented. Exsorbet Plus is showing promise as an in-situ bioremediation agent. It is made of naturally grown Spaghnum Peat Moss which has been activated for encapsulation and blended with nitrogen-rich fertilizer. In its initial field test in Caracas, Venezuela, it was able to remediate crude oil-contaminated soil in 90 days at less than half of the cost of competing technologies. Waste Solutions, Corp and the US Department of Energy signed a Cooperative Research and Development Agreement to test Exsorbet Plus at the Rocky Mountain Oilfield Testing Center near Casper, Wyoming. As part of the test, soil contaminated with crude oil was treated with Exsorbet Plus to aid the in-situ bioremediation process. Quantitative total petroleum hydrocarbon (TPH) measurements were acquired comparing the performance of Exsorbet Plus with an adjacent plot undergoing unaided in-situ bioremediation.
Date:
April 1, 2002
Creator:
Manlapig, D. M. & Williamsws
Object Type:
Report
System:
The UNT Digital Library
[News Script: Sports segment, February 27, 1971]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story about the daily sports news.
Date:
February 27, 1971, 6:00 p.m.
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
Disposal of NORM waste in salt caverns
Some types of oil and gas production and processing wastes contain naturally occurring radioactive materials (NORM). If NORM is present at concentrations above regulatory levels in oil field waste, the waste requires special disposal practices. The existing disposal options for wastes containing NORM are limited and costly. This paper evaluates the legality, technical feasibility, economics, and human health risk of disposing of NORM-contaminated oil field wastes in salt caverns. Cavern disposal of NORM waste is technically feasible and poses a very low human health risk. From a legal perspective, there are no fatal flaws that would prevent a state regulatory agency from approving cavern disposal of NORM. On the basis of the costs charged by caverns currently used for disposal of nonhazardous oil field waste (NOW), NORM waste disposal caverns could be cost competitive with existing NORM waste disposal methods when regulatory agencies approve the practice.
Date:
July 1, 1998
Creator:
Veil, J. A.; Smith, K. P.; Tomasko, D.; Elcock, D.; Blunt, D. & Williams, G. P.
Object Type:
Article
System:
The UNT Digital Library
Alberto Grau: The Composer, Selected Works, and Influence upon the Venezuelan and International Choral Community
Alberto Grau is arguably one of the most influential contemporary Venezuelan choral composers and conductors of the twentieth and twenty-first centuries. This thesis explores the synthesis of Venezuelan nationalism with global internationalism found within his works. As a student of the nationalistic generation of composers (Vicente Emilio Sojo, Juan Bautista Plaza, and Ángel Sauce) Grau's works display the distinct characteristics found in Venezuelan music. His output also exhibits international influences, using texts associated with social and environmental events and concerns including literary and musical influences of other nations and cultures. The first section of the thesis traces the lineage of Venezuelan choral composers beginning with the colonial period and the Escuela de Chacao to the nationalistic composers from the Santa Capilla generation. The second section describes Alberto Grau's compositional style as exemplified in his work Kasar mie la gaji (The Earth is Tired). The final section of the document comprises interviews with Alberto Grau and his wife, the Venezuelan choral conductor, María Guinand. Guinand studied piano and conducting with Alberto Grau and was his assistant at the Orfeón Universitario Simón Bolívar and the Schola Cantorum de Caracas. She is the founding conductor of the Cantoría Alberto Grau and the editor …
Date:
August 2007
Creator:
Yu, Julie
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Simulación de la dinámica de un bosque tropical en los Llanos occidentales de Venezuela
Article discussing the simulation of the dynamics of a tropical forest in the Western Llanos of Venezuela.
Date:
February 2006
Creator:
Angulo, Hirma Ramírez; Ablan, Magdiel; Torres-Lezama, Armando & Acevedo, Miguel F.
Object Type:
Article
System:
The UNT Digital Library
Relaciones alométricas y patrones de crecimiento para especies de árboles de la reserva forestal Imataca, Venezuela
Article discussing allometric relations and growth patterns for tree species in the Imataca Forest Reserve, Venezuela.
Date:
May 2005
Creator:
Delgado, Luz A.; Acevedo, Miguel F.; Castellanos, Hernán; Angulo, Hirma Ramírez & Serrano, Julio
Object Type:
Article
System:
The UNT Digital Library
Density functional calculations for prediction of ultra-thin film structure and properties
Most of the published theoretical and calculational effort on unsupported, ordered, ultra-thin films (``UTF``) in vacuo has focused on the thickest computationally feasible systems as models for surface properties of semi-infinite slabs. Crystalline periodic length scales in two cartesian dimensions combined with molecular- scale thickness in the third, however, make UTF`s strong candidates for the occurrence of quantum interference effects. Many UTF properties were predicted first from jellium slab models. A noteworthy prediction was that there would be large oscillations in the work function as a function of layer number. Extensive calculations on a variety of N-layers (N = 1,2,3... atomic planes) using all-electron, full-potential, local-spin-density approximation techniques show that the work function oscillation is weaker than expected but that there are significant layer-number dependences in the equilibrium lattice parameters, inter-planar spacings, electronic structure, density of states, and electronic stopping power. This paper reviews our own calculations as well as some others. Our objectives include the discernment of systematics within UTF`s, systematics in relationship to their counterpart crystals, relationship with surface properties, and appraisal of challenges to current models and methods.
Date:
September 1, 1995
Creator:
Trickey, S.B. & Boettger, J.C.
Object Type:
Article
System:
The UNT Digital Library
Taller de Trabajo Sobre Modelaje de Cultivos: Entrenamiento y Calibracion Informe
Report on a Modeling Crop and Climate Change workshop. The objectives of the workshop were: 1) train Venezuelan scientists in the use of agricultural models IBSNAT program (International Benchmark Sites Network for Agrotechnology Transfer), including discussions about their applicability and the acquisition of knowledge about the data needed for proper simulation and validation, 2) Calibrate the model of maize (CERES) for different cultivars and different regions of Venezuela using data from soil and climate corresponding to various tests, 3) Carry out model simulations under various climate scenarios to assess their potential effects on crops, 4) To strengthen the cooperation between users of IBSNAT models to make necessary tests to get a better database application thus facilitating validation and calibration of these models, and 5) To establish plans for future agricultural and meteorological research in the context of global climate change.
Date:
November 1989
Creator:
Acevedo, Miguel F.; Andressen, Rigoberto; Azocar, Aura; Bisbal, Evelyn; Comerma, Juan; Corvo, Fernando et al.
Object Type:
Report
System:
The UNT Digital Library
Heterogeneidad estructural y lumínica del sotobosque de una selva nublada andina de Venezuela
Article discussing the understory of an Andean cloud forest in the Sierra Nevada National Park, Venezuela.
Date:
July 2003
Creator:
Acevedo, Miguel F.; Ataroff, Michele; Monteleone, Susan & Estrada, Carlos A.
Object Type:
Article
System:
The UNT Digital Library
Composite fermion excitations in fractional quantum Hall systems
In two dimensional systems in a strong magnetic field, electrons can be transformed into composite Fermions (CF) by attaching to each a fictitious flux tube (carrying flux {Phi}) and fictitious charge q, where the product q{sup {Phi}} is a multiple of 2 {Pi}. In the mean field approximation, this transformation converts a fractionally filled electron Landau level into an integrally filled CF Landau level. This integrally filled CF Landau level corresponds to the ground state of a Laughlin incompressible fluid. Excited states are described by the n{sub QE} and n{sub QH}, the numbers of quasielectron and quasihole CF excitations. For N electrons on the surface of a sphere the energy and angular momentum of a quasihole (or quasielectron) are {var_epsilon}{sub QH} and l{sub QH}=1/2(N+n{sub QH}-n{sub QE}-1) (or {var_epsilon}{sub QE} and l{sub QE}=l{sub QH}+1). The lowest energy sector of the energy spectrum contains the minimum number of CF excitations consistent with the value of N and the degeneracy of the lowest Landau level, 2S+1. The first excited sector contains one additional QE-QH pair. The total angular momentum L is obtained by adding the angular momenta of QE excitations and QH excitations treated as distinguished sets of Fermions. In the absence of …
Date:
April 1, 1995
Creator:
Quinn, John J.
Object Type:
Article
System:
The UNT Digital Library
Properties of pure and sulfided NiMoO{sub 4} and CoMoO{sub 4} catalysts: TPR, XANES and time-resolved XRD studies
X-ray absorption near-edge spectroscopy (XANES) was used to characterize the structural and electronic properties of a series of cobalt- and nickel-molybdate catalysts (AMoO{sub 4}.nH{sub 2}O, {alpha}-AMoO{sub 4}, {beta}-AMoO{sub 4}; A=Co or Ni). The results of XANES indicate that the Co and Ni atoms are in octahedral sites in all these compounds, while the coordination of Mo varies from octahedral in the {alpha}-phases to tetrahedral in the {beta}-phases and hydrate. Time-resolved x-ray diffraction shows a direct transformation of the hydrates into the {beta}-AMoO{sub 4} compounds (following a kinetics of first order) at temperatures between 200 and 350{degrees}C. This is facilitated by the similarities that the AMoO{sub 4}.nH{sub 2}O and H{sub 2} at temperatures between 400 and 600{degrees}C, forming gaseous water oxides in which the oxidation state of Co and Ni remains +2 while that of Mo is reduced to +5 or +4. After exposing {alpha}-NiMoO{sub 4} and {beta}-NiMoO{sub 4} to H{sub 2}S, both metals get sulfided and a NiMoS{sub x} phase is formed. For the {beta} phase of NiMoO{sub 4} the sulfidation of Mo is more extensive than for the {alpha} phase, making the former a better precursor for catalysts of hydrodesulfurization reactions.
Date:
December 31, 1998
Creator:
Chaturvedi, S.; Rodriguez, J. A.; Hanson, J. C.; Albornoz, A. & Brito, J. L.
Object Type:
Report
System:
The UNT Digital Library
Analysis of heavy oils: Method development and application to Cerro Negro heavy petroleum
On March 6, 1980, the US Department of Energy (DOE) and the Ministry of Energy and Mines of Venezuela (MEMV) entered into a joint agreement which included analysis of heavy crude oils from the Venezuelan Orinoco oil belt.The purpose of this report is to present compositional data and describe new analytical methods obtained from work on the Cerro Negro Orinoco belt crude oil since 1980. Most of the chapters focus on the methods rather than the resulting data on Cerro Negro oil, and results from other oils obtained during the verification of the method are included. In addition, published work on analysis of heavy oils, tar sand bitumens, and like materials is reviewed, and the overall state of the art in analytical methodology for heavy fossil liquids is assessed. The various phases of the work included: distillation and determination of routine'' physical/chemical properties (Chapter 1); preliminary separation of >200{degree}C distillates and the residue into acid, base, neutral, saturated hydrocarbon and neutral-aromatic concentrates (Chapter 2); further separation of acid, base, and neutral concentrates into subtypes (Chapters 3-5); and determination of the distribution of metal-containing compounds in all fractions (Chapter 6).
Date:
December 1, 1989
Creator:
Carbognani, L.; Hazos, M.; Sanchez, V.; Green, J. A.; Green, J. B.; Grigsby, R. D. et al.
Object Type:
Report
System:
The UNT Digital Library
Informacion Ambiental y Ecologica Sobre los Llanos del Rio Orinoco: Proyecto Orinoco-Apure: Secciones 1 y 2
This report includes sections one and two of a study of the Llanos del Rio Orinoco. The aim of this study is to establish relationships between the characteristics of plant communities of the Central Plains of Venezuela and geomorfogenetica and pedogenic evolution during the Quaternary.
Date:
June 1985
Creator:
Acevedo, Miguel F.; Silva, Juan F. & Raventós, José
Object Type:
Report
System:
The UNT Digital Library
Household energy use in urban Venezuela: Implications from surveys in Maracaibo, Valencia, Merida, and Barcelona-Puerto La Cruz
This report identifies the most important results of a comparative analysis of household commercial energy use in Venezuelan urban cities. The use of modern fuels is widespread among all cities. Cooking consumes the largest share of urban household energy use. The survey documents no use of biomass and a negligible use of kerosene for cooking. LPG, natural gas, and kerosene are the main fuels available. LPG is the fuel choice of low-income households in all cities except Maracaibo, where 40% of all households use natural gas. Electricity consumption in Venezuela`s urban households is remarkably high compared with the levels used in households in comparable Latin American countries and in households of industrialized nations which confront harsher climatic conditions and, therefore, use electricity for water and space heating. The penetration of appliances in Venezuela`s urban households is very high. The appliances available on the market are inefficient, and there are inefficient patterns of energy use among the population. Climate conditions and the urban built form all play important roles in determining the high level of energy consumption in Venezuelan urban households. It is important to acknowledge the opportunities for introducing energy efficiency and conservation in Venezuela`s residential sector, particularly given current …
Date:
August 1, 1993
Creator:
Figueroa, M. J. & Sathaye, J.
Object Type:
Report
System:
The UNT Digital Library
Drug Control: U.S. Counternarcotics Cooperation with Venezuela Has Declined
A letter report issued by the Government Accountability Office with an abstract that begins "Hundreds of metric tons of cocaine flow annually from South America toward the United States, threatening the security and well-being of U.S. citizens. Since 2000, the United States has provided about $8 billion to countries in the region to disrupt drug trafficking. Most of this assistance went to Colombia to reduce illicit drug production and improve security. In March 2009, the Department of State reported that Venezuela had become a major transit route for cocaine out of Colombia, with a more than fourfold increase in cocaine flow between 2004 and 2007. We determined (1) what is known about cocaine trafficking through Venezuela, (2) what is known about Venezuelan support for Colombian illegal armed groups, and (3) the status of U.S and Venezuelan counternarcotics cooperation since 2002. To address these objectives, we reviewed U.S. counternarcotics reports, assessments, and other documents regarding illicit drugs transiting Venezuela. We also traveled to Venezuela and Colombia to discuss these matters with U.S. and foreign government officials."
Date:
July 20, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library