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2,246 Matching Results
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Ecological Enhancement of Timber Growth: Applying Compost to Loblolly Pine Plantations
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Use of this item is restricted to the UNT Community
This study explored the application of compost onto a small loblolly pine tree forest in northeast Texas. Its purpose was to determine if the application of various amounts of compost would provide for accelerated rates of growth for the trees. Soil parameters were also monitored. A total of 270 trees were planted and studied in a northeast Texas forest ecosystem. Compost rates of 5, 25, and 50 tons per acre with either soil or compost backfill were utilized and compared to a control without compost. Nonparametric and parametric ANOVA and Chi-Square tests were utilized. The results indicated that greater application rates retained greater moisture and higher pH levels in the soil. Compost applications also yielded a greater survival rate as well as larger tree height and diameter when compared to the control. The 25 ton/acre application backfilled in native soil achieved the greatest average in height and diameter when compared to the averages for the control plot. Greater growth differences for the 25S application can be attributed to additional nutrients coupled with a stable pH consistent with native soil acidity.
Date:
December 1999
Creator:
Stuckey, Harold Troy
System:
The UNT Digital Library
Mail Order Music: the Hinners Organ Company in the Dakotas, 1879-1936
Founded in 1879 by John L. Hinners, the Hinners Organ Company developed a number of stock models of small mechanical-action instruments that were advertised throughout the Midwest. Operating without outside salesmen, the company was one of the first to conduct all of its affairs by mail, including the financial arrangements, selection of the basic design, and custom alterations where required. Buyers first met a company representative when he arrived by train to set up the crated instrument that had been shipped ahead of him. Tracker organs with hand-operated bellows were easily repaired by local craftsmen, and were suited to an area that, for the most part, lacked electricity. In all, the company constructed nearly three thousand pipe organs during its sixty years of operation. Rapid decline of the firm began in the decade prior to 1936 during which the company sold fewer than one hundred instruments, and closed in that year when John's son Arthur found himself without sufficient financial resources to weather the lengthy depression. The studies of the original-condition Hinners organs in the Dakotas include extensive photographs and measurements, and provide an excellent cross section of the smaller instruments produced by the company. They are loud, excellently crafted, …
Date:
August 1997
Creator:
Alcorn-Oppedahl, Allison A. (Allison Ann)
System:
The UNT Digital Library
Beyond the "Year of Song": Text and Music in the Song Cycles of Robert Schumann after 1848
In recent years scholars have begun to re-evaluate the works, writings, and life of Robert Schumann (1810-1856). One of the primary issues in this ongoing re-evaluation is a reassessment of the composer's late works (roughly defined as those written after 1845). Until recently, the last eight years of Schumann's creative life and the works he composed at that time either have been ignored or critiqued under an image of an illness that had caused periodic breakdowns. Schumann's late works show how his culture and the artists communicating within that culture were transformed from the beginning to the middle of the nineteenth century. These late works, therefore, should be viewed in the context of Schumann's output as a whole and in regard to their contributions to nineteenth-century society. Schumann's contributions, specifically to the genre of the song cycle from 1849 to 1852, are among his late compositional works that still await full reconsideration. A topical study, focusing on three themes of selections from his twenty-three late cycles, will provide a critical evaluation of Schumann's compositional output in the genre of the song cycle. First, Schumann's political voice will be examined. The political events that led to the mid-nineteenth-century revolutions inspired crucial …
Date:
May 2007
Creator:
Ringer, Rebecca Scharlene
System:
The UNT Digital Library
Citizen Involvement and Law Enforcement: Does Coproduction Affect Organizational Efficiency and Organizational Effectiveness?
Citizen involvement in the production and delivery of public service has been a long time topic of interest and controversial debate among scholars. Essentially, the belief has been that if citizens are actively involved in the process, public organizations and communities benefit in numerous ways that will ultimately lead to increased citizen satisfaction. The purpose of this research is to explore the relationship between citizen involvement in the production of public safety and security and its effects on organizational efficiency and effectiveness of law enforcement agencies. To test the assumption that citizen involvement is positively correlated to organizational success and organizational efficiency of law enforcement agencies, a citizen involvement index was developed and used as the independent variable in ordinary least square regression (OLS) analysis. Three separate models are developed to measure the impact of citizen involvement on law enforcement. Findings obtained through bivariate and multivariate analyses indicate mixed results. Bivariate analysis revealed that citizen involvement was negatively correlated to organizational efficiency while no statistically significant correlation was found in multiple regressions. In addition, through bivariate analyses, citizen involvement was positively correlated with crime rates reported to city police departments, whereas multivariate regression analyses indicated that citizen involvement does not …
Date:
August 2009
Creator:
Gultekin, Sebahattin
System:
The UNT Digital Library
Beyond the Merchants of Death: the Senate Munitions Inquiry of the 1930s and its Role in Twentieth-Century American History
The Senate Munitions Committee of 1934-1936, chaired by Gerald Nye of North Dakota, provided the first critical examination of America's modern military establishment. The committee approached its task guided by the optimism of the progressive Social Gospel and the idealism of earlier times, but in the middle of the munitions inquiry the nation turned to new values represented in Reinhold Niebuhr's realism and Franklin D. Roosevelt's Second New Deal. By 1936, the committee found its views out of place in a nation pursuing a new course and in a world threatening to break out in war. Realist historians writing in the cold war period (1945-1990) closely linked the munitions inquiry to isolationism and created a one-dimensional history in which the committee chased evil "merchants of death." The only book-length study of the munitions investigation, John Wiltz's In Search of Peace, published in 1963, provided a realist interpretation. The munitions inquiry went beyond the merchants of death in its analysis of the post-World War I American military establishment. A better understanding emerges when the investigation is considered not only within an isolationist framework, but also as part of the intellectual, cultural, and political history of the interwar years. In particular, Franklin …
Date:
May 1996
Creator:
Coulter, Matthew Ware
System:
The UNT Digital Library
"God will get me through": African American women coping with breast cancer and implications for support groups.
This research examines the coping processes of African American women with breast cancer and how those processes relate to low usage of cancer support groups by these women. Prior coping research has utilized predominantly White samples. The limited research on African American coping responses is conflicting and characterized by small samples and non-probability sampling techniques. In this study, 26 respondents from Central and North Texas metropolitan areas were interviewed, including 9 key informants, 9 African American breast cancer survivors, and 8 White survivors. The data suggest that African American and White women cope with breast cancer in significantly different ways. Culture appears to account for the differences. All African American breast cancer survivors identified faith as their primary coping strategy. In contrast, only half of the White survivors claimed faith as their primary coping strategy, but like the other White survivors, tended to rely on multiple coping strategies. The African American survivors conceptualized God as an active member of their support network. Most prayed for healing, and several attributed examples of healing to God's intervention. The White survivors found God's presence in the actions of other people. They prayed for strength, peace, and courage to endure the illness. The use …
Date:
May 2005
Creator:
McCoy, Brenda G.
System:
The UNT Digital Library
Changes in Quantitative EEG and Low Resolution Tomography Following Cranial Electrotherapy Stimulation.
The effects of cranial electrotherapy stimulation (CES) on human EEG and brain current density were evaluated by quantitative electroencephalography (qEEG) and low resolution brain electromagnetic tomography (LORETA). A total of 72 research subjects were provided with a single session of CES, 38 were provided with 0.5 Hz CES while 34 were provided with 100 Hz CES. The qEEG paired t-tests revealed that in both frequencies of CES there was a significant (.05) increase in alpha relative power with concomitant decreases in delta and beta relative power. The 0.5 Hz CES decreased a wider frequency range of delta activity, while the 100 Hz CES decreased a wider frequency range of beta activity; suggesting some difference may exist in the EEG response to different frequencies of CES. The changes found in qEEG relative power were consistent with the affective and cognitive effects of CES reported in the literature, such as increased relaxation and decreased anxiety. Statistically significant changes for qEEG values other than relative power, such as coherence, amplitude asymmetry, phase lag and power ratios were also found. The LORETA paired t-tests found statistically significant (.05) increases in cortical and subcortical theta and alpha frequency current density with concomitant decreases in delta …
Date:
August 2006
Creator:
Kennerly, Richard C.
System:
The UNT Digital Library
Thermochemical Study of Crystalline Solutes Dissolved in Ternary Hydrogen-Bonding Solvent Mixtures
The purpose of this dissertation is to investigate the thermochemical properties of nonelectrolyte solutes dissolved in ternary solvent mixtures, and to develop mathematical expressions for predicting and describing behavior in the solvent mixtures. Forty-five ternary solvent systems were studied containing an ether (Methyl tert-butyl ether, Dibutyl ether, or 1,4-Dioxane), an alcohol (1-Propanol, 2-Propanol, 1-Butanol, 2-Butanol, or 2-Methyl-1-propanol), and an alkane (Cyclohexane, Heptane, or 2,2,4-Trimethylpentane) cosolvents. The Combined NIBS (Nearly Ideal Binary Solvent)/Redlich-Kister equation was used to assess the experimental data. The average percent deviation between predicted and observed values was less than ± 2 per cent error, documenting that this model provides a fairly accurate description of the observed solubility behavior. In addition, Mobile Order theory, the Kretschmer-Wiebe model, and the Mecke-Kempter model were extended to ternary solvent mixtures containing an alcohol (or an alkoxyalcohol) and alkane cosolvents. Expressions derived from Mobile Order theory predicted the experimental mole fraction solubility of anthracene in ternary alcohol + alkane + alkane mixtures to within ± 5.8%, in ternary alcohol + alcohol + alkane mixtures to within ± 4.0%, and in ternary alcohol + alcohol + alcohol mixtures to within ± 3.6%. In comparison, expressions derived from the Kretschmer-Wiebe model and the Mecke-Kempter …
Date:
May 2001
Creator:
Pribyla, Karen J.
System:
The UNT Digital Library
The Governor and the Gangster: Dewey, Luciano, Commutation, and Controversy
Thomas E. Dewey and Charles "Lucky" Luciano became household names during a 1936 vice trial in which Dewey successfully prosecuted Luciano, a prominent Mafioso, who received a thirty-to-fifty-year prison sentence. Later, Dewey became the Governor of New York and a perennial Republican presidential candidate while Luciano, still in prison, took part in a joint Navy-Mafia intelligence operation in World War II. In 1946, Governor Dewey commuted Luciano's sentence on the condition that he be deported to his native Italy. The commutation led to years of controversy fomented by the Federal Bureau of Narcotics (FBN), which downplayed Luciano's wartime services, spread rumors that he had bribed his way out of prison, and claimed that he was smuggling drugs into America from Italy. The FBN's narrative was echoed by muckraking journalists and Dewey's political opponents, finally prompting Dewey in 1954 to order an investigation that thoroughly debunked FBN assertions. However, the records of that investigation were quarantined until the mid-1970s. Since then, most scholars have used those records to explore the Navy-Mafia wartime alliance, but this dissertation exhaustively mines them and other documents in Dewey's papers, along with federal records, to disprove the FBN's narrative that there was something untoward about Dewey's …
Date:
July 2023
Creator:
Rzeppa, Joseph
System:
The UNT Digital Library
The Crater of Diamonds: A History of the Pike County, Arkansas, Diamond Field, 1906-1972
Access:
Use of this item is restricted to the UNT Community
The first diamond mine in North America was discovered in 1906 when John W. Huddleston found two diamonds on his farm just south of Murfreesboro in Pike County, Arkansas. Experts soon confirmed that the diamond-bearing formation on which Huddleston made his discovery was the second largest of its kind and represented 25 percent of all known diamond-bearing areas in the world. Discovery of the field generated nearly a half century of speculative activity by men trying to demonstrate and exploit its commercial viability. The field, however, lacked the necessary richness for successful commercial ventures, and mining was eventually replaced in the early 1950s by tourist attractions that operated successfully until 1972. At that time the State of Arkansas purchased the field and converted it to a state park. Thus this work tell the rich and complicated story of America'a once and only diamond field, analyzes the reasons for the repeated failures of efforts to make it commercially viable, and explains how it eventually succeeded as a tourist venture.
Date:
May 2002
Creator:
Henderson, John C.
System:
The UNT Digital Library
An Empirical Examination of Service Dominant Logic: The Theory of the Network
Marketing scholars question the ability of the 4Ps to explain higher order phenomena in modern marketing. Scholars contend that marketing's historical framework, based in product centric economic theory, constrains the 4Ps ability to form a foundation for a general theory of marketing. The focus on value embedded in product fails to explain knowledge-based intangible sources of competitive advantage. In response to this concern a new dominant logic for marketing called service-dominant logic (S-D Logic) has been proposed. However, not all scholars are supportive of S-D Logic. Still nescient, S-D Logic lacks a theoretic model, operationalized constructs, and relationships between those constructs. This study addresses those deficiencies by: (1) generation of a grounded theory of a performance-oriented network; (2) empirical assessment of the S-D Logic literature; and (3) development of an inductively generated theory of S-D Logic to include constructs, relationships, outcomes, and hypothesis. This investigation provides an important set of research findings. The resultant service-oriented network theory suggests a theoretic structure for S-D Logic. Use of grounded theory provides a strong empirical foundation based in a leading edge multi-national market segment composed corporations and programs worth hundreds of billions of dollars. The analysis drew upon 44 field interviews and follow-up …
Date:
August 2007
Creator:
Randall, Wesley Spencer
System:
The UNT Digital Library
Comparison of Bare Root vs. Potted Plants, Species Selection, and Caging Types for Restoration of a Prairie Wetland, and Quantitative Analysis and Descriptive Survey of Plant Communities and Associations at Lewisville Lake Environmental Learning Area (LLELA), Lewisville, TX
Lewisville Lake Environmental Learning Area (LLELA) is an 809-hectare property in Denton County, TX. A study of the vegetation community identified 466 species in 104 families, with 25% of the species from only two families, Asteraceae and Poaceae. The property demonstrates the characteristics of an early successional community, dominated by weedy species. Prairie communities are dominated by Johnson grass and ragweed, with climax tall grass prairie communities only in areas that have been planted with native grass seed. Forest communities are similarly in an early successional stage, dominated by the hackberry-elm-ash alliance, with small remnants of native Cross Timbers found in isolated patches. Species richness and diversity were highest in the forests and lowest in the wetlands; evenness, though not different across ecosystems, demonstrated a strong seasonal component. The species list was compared with previously reported lists for Denton County, and 256 species identified had not been previously reported for the county. A wetland restoration study was conducted to determine if there was a difference in survival and growth between potted transplants with intact root systems and bare-root transplants. Two different mesh sizes were used for protection, and the success of the different caging was evaluated. Of eight species, only …
Date:
May 2007
Creator:
Buckallew, Robin R.
System:
The UNT Digital Library
Effects of Water Quality, Instream Toxicity, and Habitat Variability on Fish Assemblages in the Trinity River, Texas
The Trinity River flows through the Dallas-Ft. Worth Metroplex in north central Texas where it receives effluents from numerous point sources including seven large regional wastewater treatment facilities. Historically, the Trinity River has been impacted by massive wastewater loadings which often constitute > 80% of the total river discharge during low flow periods. Normally, high mass loadings correspond to the summer months, compounding the effects of a naturally stressful period, characterized by high temperatures and low dissolved oxygen concentrations. Samples from 12 stations were collected quarterly over an 18 month period from the Trinity River and two tributaries. Water samples were analyzed for a variety of water quality variables, including metals, priority pollutants, pesticides, and general water quality parameters. Water samples were also tested for acute and subchronic effects with several test species. Fish were collected at each station and assemblages were characterized using traditional classification techniques and the Index of Biotic Integrity. In addition, sediment samples were assessed for toxic effects which could have adversely impacted fish recruitment and in situ biomonitoring experiments were performed. Quantitative habitat characterization analyses were performed to gain additional information that could possibly explains differences in fish assemblage structure related to habitat variability. Data …
Date:
December 1989
Creator:
Arnold, Winfred R., 1960-
System:
The UNT Digital Library
Opera and Society in Early-Twentieth-Century Argentina: Felipe Boero's El Matrero
Premiering at the twilight of the gauchesco era and the dawn of Argentine musical Modernism, El matrero (1929) by Felipe Boero (1884-1958) remains underexplored in terms of its social milieu and artistic heritage. Instantly hailed as a masterpiece, the work retains a place in the local repertory, though it has never been performed internationally. The opera draws on myths of the gaucho and takes further inspiration from the energized intellectual environment surrounding the one-hundred-year anniversary of Argentine Independence. The most influential writers of the Centenary were Leopoldo Lugones (1874-1938), Ricardo Rojas (1882-1957), and Manuel Gálvez (1882-1962). Their times were marked by contradictions: xenophobia and the desire for foreign approbation; pride in an imaginary, "barbaric" yet noble ideal wiped out by the "civilizing" ambitions of revered nineteenth-century leaders. Krausism, a system of ideas following the teachings of Karl Friedrich Krause (1781-1832), had an impact on the period as exhibited in the political philosophy of Hipólito Yrigoyen (1852-1933), who served as president from 1916 to 1922 and 1928 to 1930 when he was deposed by a right-wing coup d'état. Uncritical applications of traditional understandings of nationalism have had a negative impact on Latin American music scholarship. A distillation of scholarly conceptions of …
Date:
August 2016
Creator:
Sauceda, Jonathan
System:
The UNT Digital Library