Digital Commons Network^™

The Effect Of Fire Season And Frequency On The Plant Community Of A Restored Tallgrass Prairie., Nathaniel David Birks

Student Work

The effect fire season and frequency was evaluated in 2001 at a 65 ha restored tallgrass prairie in eastern Nebraska using permanent plots established in 1978 and first evaluated in 1979. Treatments included annual and quadrennial burning in spring, summer, and fall as well as unburned plots. Overall, the number of species increased from 28 in 1979 to 30 in 2001, with a shift from ruderal to native species. Shannon diversity (H’) increased significantly across all treatments during this time. Canopy cover of grasses (+19%) and forbs (+18%) increased significantly. However, only forbs showed a significant difference among treatments in …

Fibergramme Vol.27 No. 3, Weavers Of Orlando

Text Materials of Central Florida

FIBERGRAMME is published in September, November, January, March and May.

Fibergramme Vol. 27, No. 3, Weavers Of Orlando

Text Materials of Central Florida

FIBERGRAMME is published in September, November, January, March and May.

Nicotine Toxicity In Neuronal Cells, Michael Hunte

Theses (Pre-2016)

N/A

Bioactive Phytochemical From Mango And Stone Fruits Seeds, Ehimare Aigbivbalu

Theses (Pre-2016)

In previous years, artificially manufactured chemicals were the main source of pesticide. Though effective, some of these chemicals were notorious for causing environmental problems. However, in recent years, there has been a great interest in the use of naturally produced chemicals (phytochemicals) as a preferred source for pesticides. This is due to the fact that phytochemicals are very environmentally friendly and are known to be specific in their action. In this research, mango seed, plum seed, and nectarine seed were tested for bioactivity. Each seed was separated into pulp and shell and their chemical components extracted using solvent extraction. The …

A Feminist Reading Of Suffering And Perseverance In Stowe’S Uncle Tom’S Cabin, Harper’S Iola Leroy And Minnie’S Sacrifice., Dennis Roy Easington

Theses (Pre-2016)

This thesis explores the topic of Black feminism in the nineteenth century and attempts to chronicle the suffering and perseverance of African-American slaves. The primary sources used in this research include Harriet Beecher Stowe's Uncle Tom's Cabin or Life Among the Lowly and Frances E. W. Harper's lola Leroy and Minnie's Sacrifice. These texts establish a central focus on Black feminism; suffering and perseverance are of vital significance in the lives of Cassy, lola and Minie respectively. This study also presents a strong focus on the historical and didactic perspectives in which suffering and perseverance are juxtaposed. Undoubtedly, the authors, …

A Lighting Design Process For Twelfth Night, Erin Alberts

Electronic Theses and Dissertations

The profession of theatrical lighting design is a relatively young one. For many years the responsibility of lighting the stage fell on the shoulders of directors or technicians. In this ever-changing world, lighting, like so many other jobs, has grown not just with technology but with the functions lighting executes. Requirements of lighting now include: special effects, revealing as well as hiding, and texture of the stage. The need for illumination of the stage is a given; the people and things on stage must be seen. It is the artistry and technology that now goes along with this field that …

Women's Diaries In An Online Era, Emily Ostendorf

Honors Theses

No abstract provided.

Fluctuations In Chinook Salmon (Oncorhynchus Tshawytscha) Counts At Three Lower Columbia River Spawning Sites, Eric Michael Loomis

UNLV Theses, Dissertations, Professional Papers, and Capstones

Several hypotheses were developed to explore the pronounced increase in Chinook salmon (Oncorhynchus tshawytscha) returning to spawning grounds at the Cowlitz, Kalama, and Lewis Rivers, three tributaries of the lower Columbia River. The study was conducted using data compiled over a ten-year span from 1991-2001. Preliminary indications are that trends in climate are linked to these increases, with the absence of El Niño events and fluctuations in winter precipitation as likely explanations of these phenomena. The unique nature of Chinook life cycles causes them to utilize a variety of habitats that require ideal conditions for maximum survival rates. Correlations between …

Water Quality Remediation At The Abandoned Jones-Kincaid Mine Site, Pyramid Mining District, Washoe County, Nevada, Si-Ok Choi

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this paper is to evaluate the cost and efficiency of four remediation methods, natural attenuation, permeable reactive barriers, pump and treat systems, and bioremediation, and to determine the best suitable method for preventing further environmental degradation from the abandoned Jones-Kincaid Mine (JKM), located within the Pyramid Mining District, Washoe County, Nevada.

Problems from abandoned mine sites may be divided into four types: water quality, public safety, economic concerns, and scenic interests. The foremost problem is the effect of pollution on water quality. Acid run-off and precipitation may be spread hundreds of miles and influence drinking water sources …

On Nelson Street And Ball Lightning, Cheryl Stiles

Digitized Theses and Dissertations (prior to 2008)

A thesis submitted in partial fulfillment of the Requirements for the degree of Master of Arts in Professional Writing in the Department of English In the College of Humanities and Social Sciences of Kennesaw State University

Social Networks And Information Technology, James L. Hill

Student Scholarship

That so many large-scale or enterprise – level Information Technology (IT) projects are said to fail is a puzzle. According to the Standish Group and individual practitioners, as many as four out of five of them do. They don’t deliver the planned functionality, cost much more than budgeted, take longer than expected, or are cancelled before they are completed. (Chaos, 1995) Yet, businesses and governments continue to invest heavily in IT, expecting significant improvements in productivity and level of service. (Stiglitz, Orszag, & Orszag, 2000). As much as half of annual capital spending in certain sectors of the economy is …

The Activist Insecurity And The Demise Of Civil Rights Law, John Valery White

Louisiana Law Review

No abstract provided.

Addressing The Decline In Reproductive Performance Of Lactating Dairy Cows: A Researcher’S Perspective, William J. Silvia

Animal and Food Sciences Faculty Publications

No abstract provided.

Hybridizing Citizenship, Kathryn Abrams

University of Richmond Law Review

No abstract provided.

Tina Modotti And "Idols Behind Altars"., Andrea Jeanne Deetsch 1976-

Electronic Theses and Dissertations

This thesis is an examination of the transformation Tina Modotti's photography underwent because of the "Idols Behind Altars" project which she completed on an expedition with Edward Weston in 1926. The thesis begins with an introduction to Modotti's photography from 1923-1926, pre-expedition, exploring the conditions of the "Idols Behind Altars" trip, the issue of attribution of the "Idols Behind Altars" images, and Modotti's development of "indigenismo" as a life philosophy. The thesis uses art historical analysis based on research directed at a comparison of images to argue that the trip was the catalyst for Modotti's photographic transformation in late 1926. …

Co-Operation In Health And Safety: A Game Theory Analysis, Sylvie Nadeau

The University of New Hampshire Law Review

[Excerpt] “Health and safety managers face complex challenges in today’s production environments. They are confronted with increasingly flexible, autonomous and polyvalent contexts. Asymmetry of information on the workplace is widespread because various intervening parties rely on information lacking conformity. Social partners generate and use information which supports or benefits their pursuit of differing goals. Ascertaining and controlling this information can prove both difficult and costly. When addressing health and safety issues, one intervening partner alters or changes behavior in response to changes introduced by the other side. Strategic behaviors result, based on post-contract opportunism (moral hazard) and alliances with partners …

Development Of An Atrophic Nonunion Model And Comparison To A Closed Healing Fracture In Rat Femur, Takeshi Kokubu, David J. Hak, Scott J. Hazelwood, A. Hari Reddi

Biomedical Engineering

Although most fractures heal, some fail to heal and become nonunions. Many animal models have been developed to study problems of fracture healing. The majority of nonunion models have involved segmental bone defects, but this may not adequately represent the biologic condition in which nonunions clinically develop. The objective of the present study is to develop a nonunion model that better simulates the clinical situation in which there is soft tissue damage including periosteal disruption and to compare this model to a standard closed fracture model utilizing identical fracture stabilization, providing a similar mechanical environment. A total of 96 three …

Isolated Ventricular Myocyte Contractile Function Is Depressed In Rats Fed High Fat And/Or Marginally Copper -Deficient Diets., David P. Relling

Theses and Dissertations

Obesity is influenced by dietary consumption of fat while much of the population consumes a diet deficient of the trace mineral copper. Obesity and copper deficiency can alter cardiovascular function; including cardiac hypertrophy, increased myocyte lipid droplet volume, and cardiac contractile depression. Interestingly, lipotoxic dysfunction is characterized by many of the same mechanistic alterations that are observed in obesity and copper deficiency. Additionally, the sphingolipid ceramide is elevated in lipotoxic dysfunction. However, functional leptin:leptin receptor signaling prevents lipotoxic dysfunction. The purpose of my dissertation was to determine the role of a high fat and marginal copper deficient diet on cardiac …

Changes In Immune Cell Populations And The Antibody Response To Streptococcus Pneumoniae After Exposure To A Mixture Of Herbicides, Patricia De La Rosa

Graduate Theses, Dissertations, and Problem Reports (ETD)

The environment that we live in is composed of many different chemicals, Because of this, all chemical exposures, whether environmental or industrial, are exposures to mixtures. These mixtures have the potential to affect the immune system in a manner that is qualitatively or quantitatively different from the response to the individual components of the mixture. My experiments examine the effects of in vivo exposure to a mixture of herbicides on immune cell populations and on the humoral immune response to immunization with heat killed, whole-cell, Streptococcus pneumoniae (HKSP). The herbicide propanil (3,4-dichloropropionanilide) is sold as a mixture with the herbicide …

The Economics Of Wto Rules On Subsidies And Countervailing Measures, Alan O. Sykes

Coase-Sandor Institute for Law & Economics Research Paper Series

No abstract provided.

From Snakes To Meaning: Interpretation And Explanation Of Traditional Sub-Saharan African Religious Ethnographic Data, Joel Mort

Masters Theses

Concerns about accepted approaches to ethnographic data have arisen in terms of how scholars attempt to explain and interpret the formation, transmission, and persistence of seemingly bizarre religious ideas and practices. I would like to suggest a new way to make sense of ethnographic data regarding religious thought and action.

My contention is that the explanatory and interpretive methods employed by the majority of religion scholars are mistakenly and unknowingly informed by intuitive background theories. As a result of using intuitive assumptions rather than an established scientific theoretical tradition as the basis for interpretive inference the conclusions offered by these …

Report, Economic Contribution Of The Lowry Park Zoo To The Hillsborough County Economy, May 2003, Usf Center For Economic Development Research

Center for Economic Development Research (CEDR) Collection

Commissioned by the Lowry Park Zoological Society, this report by the University of South Florida's Center for Economic Development Research quantifies the Lowry Park Zoo's economic impact on Hillsborough County. It details contributions to local jobs, wages, and economic output for fiscal year 2001-02 and projects future impacts through 2005-06.

Resource Partitioning And Niche Differentiation Of Nectarivorous Bats In A Monteverde Cloud Forest, May 2003, D. Morris Cohen

Monteverde Institute: Tropical Ecology and Conservation

Plant-pollinator interactions are an important part of tropical ecosystem function and diversity. In this paper, I present the results of a month-long study comparing the three nectarivorous Phylostomid bat species, Anoura geoffroyi, Glossophaga commissarisi, and Hylonycteris underwoodi, and the their plant resource base within the cloud forest of Monteverde, Costa Rica. Bats were mistnetted, and their pollen loads were removed and later measured for richness, abundance, and diversity. The extent of Niche overlap between the three species was also assessed. I found G. commissarisi to carry the most diverse pollen loads (H'=0.648) and to also have the most consistent floral …

Rolled-Leaf Hispine Herbivory Of Heliconia Spp. (Heliconiaceae) Over An Altitudinal Gradient, May 2003, Sarah Bachman

Monteverde Institute: Tropical Ecology and Conservation

Hispine beetles (Coleoptera: Chrysomelidae, Hispinae) are herbivores of the Order Zingiberales (Strong 1977a). In Monteverde area there are three known species of Heliconiaceae (Zingiberales): Heliconia monteverdensis, H. tortuosa, and H. vaginalis (Haber, 1990). H. monteverdensis is a high elevation species (1500 – 1800m) whose range does not overlap with H. vaginalis, a low elevation species (700-1300m). H. tortuosa occurs along the elevational gradient from San Luis (1000m) to the forest behind the Estación Biológica de Monteverde (1760m) where this study was performed, and overlaps in geographical range with the other two species. In this study I looked at patterns of …

The Role Of Height And Flower Symmetry In Bat Pollination Of Mucuna Urens (Papilionaceae), May 2003, Callie Vincent

Monteverde Institute: Tropical Ecology and Conservation

The flowers of plants in the tropics have evolved mechanisms that attract bats and ensure that pollination is deposited on the bat for transfer to the next flower (Altringham 1996). In particular, a recent study has shown that flowers in the Mucuna genus attract bats using an acoustic nectar guide (vonHelverson and vonHelverson 1999). In order to test additional factors that could possibly play a role in the pollinator-plant relationship involvingMucuna, inflorescence height, infructescence height, and flower symmetry were studied for fiveMucuna urens patches in the Monteverde (Puntarenas, Costa Rica) cloud forest. A simple regression showed no significant relationship between …

A Hybrid Mosaic And Vice Versa, Jinhwan Choi

Theses

None provided.

Rodent Hunt, Dr. Ray Sterner

United States Department of Agriculture Wildlife Services: Staff Publications

The Dryland Project is a multi-year research effort to identify no-tillage or reduced tillage, non-irrigated crop types and practices that will improve yields and soil characteristics in eastern Colorado. Left uncultivated, this is shortgrass prairie made up of blue grama, western wheatgrass, buffalo grass, prickly pear cactus, yucca shrub, plus other plant varieties, and laced with riparian stream flows. When cultivated, winter wheat has worked well here, as long as it is left idle biannually (alternated as fallow) to restore sufficient moisture for the next cycle. Alternative dryland crops and rotation schemes are being studied as a way to reduce …

Telecommunication Of Stabilizing Signals In Power Systems, Guillaume Julien Raux

Graduate Theses, Dissertations, and Problem Reports (ETD)

Deregulation of the power industry has occurred at a rapid pace, opening some promising competition between suppliers. The result of this competition should be to the benefit of customers.;Telecommunication plays a crucial role in integrating systems and ensuring smooth operation by way of exchanging data and information between various systems that are responsible for monitoring and control of the grid. For example, a Power System Stabilizer (PSS) controller could be placed at one of the generators and requires remote measurements. All the communication schemes within the network generate delays that are characterized in this project using OPNET Modeler. OPNET Modeler …

Evaluating The Cost-Effectiveness Of St. John's Wort Versus Fluoxetine For The Treatment Of Mild To Moderate Depression, Lee Ann Thayer

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of this study was to determine the cost-effectiveness of St. John's Wort compared to fluoxetine from a third party perspective for the treatment of mild to moderate depression. Fluoxetine 20 mg daily was compared to St. John's Wort 300 mg thrice daily in a decision tree modeling depression management in the outpatient setting. Probabilities were obtained from a Medline search as well as input from an expert panel. Direct medical costs were obtained from medical offices in the Connecticut area with drug and herb cost based on 2002 published data. Several sensitivity analyses were performed. The cost-effectiveness ratio …