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  Partner: UNT Libraries
 Collection: UNT Theses and Dissertations
Metro Environmental: The impact of training HVAC technicians using the SightPros-VirTechs system for remote, wireless, Internet video assistance.

Metro Environmental: The impact of training HVAC technicians using the SightPros-VirTechs system for remote, wireless, Internet video assistance.

Date: May 2008
Creator: Daily, Ellen Wilmoth Matthews
Description: This qualitative study explored the overall impact of training HVAC technicians using the SightPros-VirTechs system for remote, wireless, internet video assistance at a small HVAC company, Metro Environmental. John Thomason, the president/co-owner developed a website and a new SightPros communication tool that allows wireless, one-on-one, just-in-time, high-quality, video-monitored instructions between an expert at one site and a technician at another site. Metro Environmental successfully used the SightPros-VirTechs system to train a new apprentice remotely. The apprentice and expert changed their normal and routine physical activities because the expert worked remotely and the apprentice worked on-site. Within just a few months, the apprentice proved competent enough to go to customer accounts without more experienced technicians nearby. The technicians express excitement about the SightPros communication tool as a way to contact remote experts whenever needed. The customer and business contacts also give good reviews and suggest other benefits. The expert permanently captures the communications so the company can use the saved video for many applications, especially training. The dissertation provides a list of recommendations to trainers/educators for similar applications.
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The Mexican Government and Railroad Development, 1824-1876

The Mexican Government and Railroad Development, 1824-1876

Date: December 1972
Creator: Nance, James D.
Description: This thesis analyzed material on Mexican railroad development before 1876 to determine what principles underlay public action in this area. Only significant or recurring concessions concerning connecting Mexico City and Veracruz, transcontinental communication, and tying the United States and Mexico by rail were studied, since they provided the best means of tracing public action over an extended period of time.
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A Mexican Postmodernist Vision Grounded on Structuralism: the Cases of Juan Trigos' Cuarteto Da Do (1988) and Victor Rasgado's Rayo Nocturnal (1989)

A Mexican Postmodernist Vision Grounded on Structuralism: the Cases of Juan Trigos' Cuarteto Da Do (1988) and Victor Rasgado's Rayo Nocturnal (1989)

Date: May 1999
Creator: Madrid-González, Alejandro L. (Alejandro Luis)
Description: This thesis contributes analyses of two works by Mexican composers: Rayo nocturnal (1989) by Victor Rasgado (b. 1959), and the Cuarteto da do (1988) by Juan Trigos (b. 1965). Although composed according to structuralist principles, a postmodern interpretation is offered. The analytical method applied is based on Allen Forte's set theory, including rhythmic and timbral dimensions that are integral to the conceptions of these works. A survey of modernism and postmodernism in twentieth-century Mexico serves to place these works in their cultural context.
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Mexico and Mexicans in the Fiction of Steinbeck, Morris, Traven and Porter

Mexico and Mexicans in the Fiction of Steinbeck, Morris, Traven and Porter

Date: August 1966
Creator: Maass, Henry Eugene Lester
Description: The purpose of this study is to investigate what seem to be the principal attitudes of Americans toward Mexico and Mexicans as expressed by four contemporary American authors, and to point out and evaluate salient features in their respective treatment of the subject.
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Mexico in the United Nations

Mexico in the United Nations

Date: August 1971
Creator: Barron, Stephanie L.
Description: The purpose of this investigation is to look at the international organization from the point of view of a small, non-military nation to discover if and how it may be useful to such a nation in carrying out its foreign policy objectives in a bi-polar, nuclear world.
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Michael Daugherty's Red Cape Tango: A Comparative Study of the Original Version for Symphony Orchestra and its Transcription for Wind Orchestra, with Four Recitals of Selected Works by Beethoven, Dvorák, Verdi, Bartók and Daugherty

Michael Daugherty's Red Cape Tango: A Comparative Study of the Original Version for Symphony Orchestra and its Transcription for Wind Orchestra, with Four Recitals of Selected Works by Beethoven, Dvorák, Verdi, Bartók and Daugherty

Access: Use of this item is restricted to the UNT Community.
Date: May 2002
Creator: Ortega, Arturo
Description: Michael Daugherty has created his niche in the music world by composing works inspired by icons of American popular culture. Red Cape Tango is the final movement of his Metropolis Symphony, a work inspired by the life and times of the comic book character Superman. This movement in particular deals with the death of the superhero through the use of musical elements, most notably the Latin Sequence of the Mass for the Dead, Dies irae. Daugherty's ingenuity in blending profoundly dark subjects with humor is particularly evident in this work. Death is personified as a temptress and lures Superman through the power of a seductive tango. This study concentrates on Daugherty's compositional style and its impact in musical circles. A transcription for wind orchestra was created by another composer/conductor precisely because of the need to bring such an important work to another medium, thus making it accessible to a wider audience. In addition, this study looks at the changes in instrumentation necessary to create a second, equally formidable version of the work.
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Michael Nyman: The Man Who Mistook His Wife for a Hat

Michael Nyman: The Man Who Mistook His Wife for a Hat

Date: May 2008
Creator: Avant-Rossi, Joan
Description: Composer Michael Nyman wrote the one-act, minimalist opera The Man Who Mistook His Wife for a Hat, based off the neurological case study written by Oliver Sacks under the same title. The opera is about a professional singer and professor whom suffers from visual agnosia. In chapter 1, the plot and history of the opera are discussed. Chapter 2 places The Man Who Mistook His Wife for a Hat alongside a selection of minimalist operas from Philip Glass and John Adams. Chapter 3 contains a history of the Fluxus art movement and shows where Fluxus-like examples appear in the opera. Chapter 4 includes Nyman's usage of minimalism, vocal congruencies, and Robert Schumann as musical elements that convey the drama.
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Micro and nano composites composed of a polymer matrix and a metal disperse phase.

Micro and nano composites composed of a polymer matrix and a metal disperse phase.

Date: December 2007
Creator: Olea Mejia, Oscar Fernando
Description: Low density polyethylene (LDPE) and Hytrel (a thermoplastic elastomer) were used as polymeric matrices in polymer + metal composites. The concentration of micrometric (Al, Ag and Ni) as well as nanometric particles (Al and Ag) was varied from 0 to 10 %. Composites were prepared by blending followed by injection molding. The resulting samples were analyzed by scanning electron microscopy (SEM) and focused ion beam (FIB) in order to determine their microstructure. Certain mechanical properties of the composites were also determined. Static and dynamic friction was measured. The scratch resistance of the specimens was determined. A study of the wear mechanisms in the samples was performed. The Al micro- and nanoparticles as well as Ni microparticles are well dispersed throughout the material while Ag micro and nanoparticles tend to form agglomerates. Generally the presence of microcomposites affects negatively the mechanical properties. For the nanoparticles, composites with a higher elastic modulus than that of the neat materials are achievable. For both micro- and nanocomposites it is feasible to lower the friction values with respective to the neat polymers. The addition of metal particles to polymers also improves the scratch resistance of the composites, particularly so for microcomposites. The inclusion of Ag ...
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Micro-fabrication of a Mach-Zehnder interferometer combining laser direct writing and fountain pen micropatterning for chemical/biological sensing applications.

Micro-fabrication of a Mach-Zehnder interferometer combining laser direct writing and fountain pen micropatterning for chemical/biological sensing applications.

Date: May 2009
Creator: Kallur, Ajay
Description: This research lays the foundation of a highly simplified maskless micro-fabrication technique which involves incorporation of laser direct writing technique combined with fountain pen based micro-patterning method to fabricate polymer-based Mach-Zehnder interferometer sensor arrays' prototype for chemical/biological sensing applications. The research provides methodology that focuses on maskless technology, allowing the definition and modification of geometric patterns through the programming of computer software, in contrast to the conventional mask-based photolithographic approach, in which a photomask must be produced before the device is fabricated. The finished waveguide sensors are evaluated on the basis of their performance as general interferometers. The waveguide developed using the fountain pen-based micro-patterning system is compared with the waveguide developed using the current technique of spin coating method for patterning of upper cladding of the waveguide. The resulting output power profile of the waveguides is generated to confirm their functionality as general interferometers. The results obtained are used to confirm the functionality of the simplified micro-fabrication technique for fabricating integrated optical polymer-based sensors and sensor arrays for chemical/biological sensing applications.
Contributing Partner: UNT Libraries
Microbial Activity in "Overland Flow" Industrial Waste Treatment

Microbial Activity in "Overland Flow" Industrial Waste Treatment

Date: August 1969
Creator: Eubanks, Elizabeth R.
Description: One of the major problems of modern industries concerns the disposal of waste materials without the concomitant pollution of the environment. Several food and wood products industries have solved this problem by using the "overland flow" method of waste treatment. The research described in this paper was undertaken to ascertain the fact that the waste purification occurring on the disposal field is the result of microbial activities in the soil, and to study the transformations taking place.
Contributing Partner: UNT Libraries