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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
651

Assessment of total phosphorus concentration as a predictor and determinant of fishery productivity in southern Appalachian reservoirs: application to Smith Mountain Lake, Virginia

Yurk, Jeffrey J. January 1989 (has links)
Phosphorus is often the limiting nutrient of primary productivity in southern Appalachian reservoirs, but its impact on higher trophic levels has not been assessed. Regression analysis was used to examine the relationship between total phosphorus concentrations and estimates of fish standing stock in Smith Mountain Lake (SML) over time and for 22 southern Appalachian reservoirs (SAR) at the same time. ln SML, which had responded to a nutrient reduction program, total phosphorus concentration and fish biomass concurrently declined over an 12-year period; phosphorus concentration accounted for one-third (cove-specific) and two-thirds (whole-Iake) of the annual variation in fish standing stock. Total phosphorus concentration was also the best predictor of fish abundance in SARs, accounting for 84% of the variation in standing stock despite great diversity in reservoir physical, chemical, and biological characteristics. Predictive power was generally higher at lower levels of the food chain (i.e. planktivores, younger fish) than for piscivores. Planktivore response to phosphorus was found to be immediate. Piscivore biomass did not vary significantly with phosphorus, owing in part to poor energy transfer up the food chain and variable management practices. Phosphorus concentration and total fish standing stock appear to have stabilized in SML since 1980. Losses in fish standing stock due to deceased fertility in SML have been partly offset by an increase in coolwater habitat. Aesthetic versus fishery benefits and the complexity of dealing with a longitudinal trophic gradient need to be considered for future management of SML. / Master of Science / incomplete_metadata
652

Spatial and temporal evolution of fluids in hydrothermal ore deposits

Lecumberri Sanchez, Pilar 10 June 2013 (has links)
Magmatic-hydrothermal systems typically have vertical extents of several hundred<br />meters and their geochemical characteristics (e.g. mineral assemblages) vary considerably<br />over that vertical extent. As a consequence the expression in outcrop varies depending on<br />the level of erosion. Therefore understanding the geochemical zonation of magmatic-hydrothermal<br />ore deposits opens the possibility to detect deep magmatic-hydrothermal<br />systems, and to assess qualitatively the degree of erosion that has taken place in the area<br />and at which level the mineralization may occur. This dissertation presents the<br />characterization of two shallow hydrothermal systems and their potential relations with<br />deeper magmatic-hydrothermal systems. In addition, this dissertation develops the<br />equations to directly interpret thermometric data from the fluid inclusion type dominant in<br />one of those deposits (fluid inclusions that homogenize by halite disappearance).<br />Red Mountain, AZ is a porphyry copper system with a well-preserved lithocap<br />providing an ideal candidate to characterize the shallow expression of porphyry copper<br />systems in the southwestern US. The distribution of fluid inclusions, alteration mineralogy<br />and grade indicate that the intrusive responsible for the mineralization was only partially<br />intercepted during the exploration program and that one single magmatic event was likely<br />responsible for the mineralization detected. Fluid inclusion types and clay minerals are<br />systematically distributed within the deposit. The fluid responsible for the shallow<br />hypogene mineralization was a low pH-intermediate temperature-low density fluid while a<br />high salinity fluid was responsible for deep mineralization.<br />Wutong is a Pb-Zn-Ag deposit in the Nanling belt (southeast China). The combination<br />of fluid inclusion and mineral thermometry indicates that the Wutong deposit formed at<br />relatively low pressures. The age and isotopic composition of the mineralization indicates<br />that the deposit formed during the Cretaceous from crustal derived fluids. The occurrence<br />of a shallow magmatic-hydrothermal system of Cretaceous age in this region suggests that<br />Cretaceous intrusions, despite not outcropping very commonly in this particular region may<br />occur at deeper levels. / Ph. D.
653

Advocating Silence

Forth, Stephen 12 June 2013 (has links)
The buildings people inhabit everyday frame their existence and provide a backdrop for life. This relationship is inextricable and, as such, begs the question as to whether buildings can function as more than mere containers for life or whether they, at some point or in some capacity, can begin to bare influence over the life or quality of life of their patrons. This project is an intention to explore this qualitative, unquantifiable aspect of building. Through a manipulation of volume and mass, constriction and expansion, solid and void, light and shadow, and the qualities of interiority and exteriority an occupied space will begin to impress itself upon the user. The main objective of this project is to use these architectural properties to create a place that fosters introspection through self awareness. By choosing presence over practicality and content over convention, the construct proposed in this thesis attempts to create spaces that are imposing and unfamiliar yet somehow emotionally reminiscent. Confronted by these contradictions and juxtapositions, this building will stand as an object, in opposition to the occupant, and through that opposition inspire and promote a greater awareness of, and possibly a reflection upon, normally unconscious thought processes. / Master of Architecture
654

A Place in Amman

Al Hamzeh, Nida Khaled Ahmad 09 July 2014 (has links)
What is a Cultural Collage? It is what is happening in Jordan today; different people from different backgrounds come to one piece of land looking for any refuge and hope. I wanted to create a building for this phenomenon. This is a building where people could come to and meet at to drink coffee and smoke hookah and share their stories. The characters that played the role in the Surrealist Movement in Paris in the 20s were my inspiration to design this building. The Artists came together in a time of war. The first World War was in action and yet, they met at a small coffee shop in Paris to discuss what they felt like discussing and at the end of the day an art movement was born. Storytelling. In these small rooms, the meeting rooms, or even the coffee house on the first level, people meet. As they order their coffee and move into the next room they can sit and socialize, tell stories and make art. As they move up to the next level the spaces become bigger and more open. The whole building starts telling a story. / Master of Architecture
655

An exploration of architectural procession in an Audubon building

Malgioglio, Joseph T. January 1993 (has links)
In designing an Audubon Society Building, I sought to explore procession and its properties in relation to architecture. A structure of hint, pause, and reveal is set up as a shared condition to control movement. This anticipation, movement through, and discovery of space contributes spatial drama to the procession. In addition to the drama created, a continuous dialogue with man is opened up by giving meaning and depth to each space. Their focus on the context of the natural surroundings, as a critical element in the procession, reinforces the educational purpose of the building by bringing man closer to nature. Together, the establishment of these complex moments and the architectural choreography comprise the dual components of architectural procession. / Master of Architecture
656

Crying for Change: Examining the Use of Period Melodrama and the Melodramatic Mode in Contemporary Queer Representation

Bonthuys, Justin 08 1900 (has links)
This thesis illustrates how Melodrama and the melodramatic mode have been adapted within contemporary cinema as both a means of commenting on prior LGBTQI representation, and of exposing mainstream audiences to the issues still faced by many within this spectrum. Through my analyses of Carol (2015), Brokeback Mountain (2005), and A Single Man (2009), I examine how filmmakers have drawn on Melodrama as both an aesthetic form, and as a reference to the broader field of generic history and criticism which ground it as a subversive form of societal critique. By focusing specifically on how these three films portray ideological issues of gender, stereotyping, parenthood, aging, and personal shame, my thesis argues that these films are making a commentary on the damaging effects of these discourses on broader society. I also simultaneously question whether the Period Melodrama as a genre can ever fully escape the conservative nature of this form, as well as the implications of continuing to portray those on the LGBTQI spectrum as victims.
657

Physiological demands of the Absa Cape Epic mountain bike race and predictors of performance

Greeff, Marli 12 1900 (has links)
Thesis (MScSportSc)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: The purpose of this qualitative-quantitative study was to describe the exercise intensity and predictors of performance of a multi-stage mountain bike (MTB) race (2014 Absa Cape Epic) lasting 8 days. Twenty-three amateur mountain bikers (age 39 ± 9 years, height 178.8 ± 8.2 cm, body mass 74.7 ± 9.1 kg, VO2max 54 ± 7 ml.kg-1.min-1) who completed the 2014 Absa Cape Epic were involved in the study. The participants were divided into two groups according to their MTB experience. The experienced group included participants who previously completed more than three 3-day multi-stage MTB events and the novices group included those who has completed less than 3-day multi-stage MTB events. Prior to the event the participants completed a maximal aerobic cycling test and a simulated 40 km time trial (TT). The maximal aerobic test was used to determine 3 work intensity zones based on heart rate (HR) corresponding to blood lactate thresholds (LT: increase in blood lactate concentration of 1 mmol.l-1 above baseline values and the onset of blood lactate accumulation (OBLA), a fixed blood lactate concentration of 4 mmol.l-1). There were no statistically significant differences in the physical, physiological and performance variables measured in the laboratory between the two groups. The exercise intensity during the Cape Epic was measured using telemetric HR monitoring sets. RPE values were noted after each stage of the race. The mean HR was 88.1 ± 5.3% (experienced) and 84.2 ± 11.0% (novices) of maximal HR during the race or 88.9 ± 3.5% (experienced) and 85.9 ± 10.6 (novices) of laboratory determined maximum HR. More time was spent in the “low” HR zone (43.1 % vs 58.5 %, respectively), while only a small amount of time was spent in the “hard” HR zone (7.4% and 6.1%, respectively). The experienced group spent statistically significantly more time in the “moderate” HR zone compared to the novices group (49.5 % vs. 35.4 %). The experienced group performed significantly better during the event compared to the novices group in both the total event time (P = 0.004) and the general classification (P = 0.01). Relative and absolute power output (PO) at OBLA (P = 0.01 and 0.02, respectively) were statistically significant predictors of total event time, while relative peak power output was a significant predictor of general classification for the event (P = 0.02) . The total TT time was a significant predictor of average event HR (P = 0.03). This study showed that this MTB stage race is physiologically very demanding and requires cyclists to have excellent endurance capacity, as well as strength and power. The parameters from the maximal aerobic capacity test correlated better with outdoor performance than parameters from the simulated 40 km TT. Therefore the standard maximal aerobic capacity test are sufficient for testing mountain bikers and sport scientists can continue using this test to prescribe exercise intensity zones for training and events. / AFRIKAANSE OPSOMMING: Die doel van hierdie kwalitatiewe-kwantitatiewe studie was om die oefeningsintensiteit en voorspellers van prestasie tydens ‘n multi-dag bergfiets kompetisie (Absa Cape Epic) van 8 dae lank te bepaal. Drie-en-twintig bergfietsryers (ouderdom 39 ± 9 jaar, lengte 178.8 ± 8.2 cm, liggaamsmassa 74.7 ± 9.1 kg, VO2maks 54 ± 7 ml.kg-1.min-1) wat die 2014 Absa Cape Epic voltooi het, het aan die studie deelgeneem. Die deelnemers is in twee groepe verdeel volgens hulle ervaring in multi-dag bergfiets kompetisies. Die ervare groep was al die deelnemers wat meer as drie 3-dae multi-dag bergfiets kompetisies voltooi het. Die onervare groep was al die deelnemers wat minder as drie 3-dag multi-dag bergfiets kompetisies voltooi het. Voor die kompetisie het al die deelnemers ‘n maksimale aërobiese toets en ‘n gesimuleerde 40 km tydtoets in die laboratorium voltooi. Die maksimale aërobiese toets is gebruik om drie werk intensiteit sones volgens die hartspoed te bepaal, naamlik die hartspoed by die laktaatdraaipunt(‘n toename in bloed [laktaat] van 1 mmol.l-1 bo die basislynwaardes) en die hartspoed by die aanvang van bloedlaktaat akkummulasie (‘n vaste bloed [laktaat] waarde van 4 mmol.l-1). Daar was geen statisties betekenisvolle verskille in die fisiese, fisiologiese en prestasie veranderlikes tussen die twee groepe nie. Die oefeningsintensiteit tydens die Cape Epic was gemeet deur gebruik te maak van hartspoedmonitors. Die RPE waardes was aan die einde van elke skof genoteer. Die gemiddelde hartspoed was 88.1 ± 5.3 % (ervare) en 84.2 ± 11.0 % (onervare) van maksimale kompetisie hartspoed, of 88.9 ± 3.5 % (ervare) en 85.9 ± 10.6 % (onervare) van die maksimale hartspoed soos in die laboratorium gemeet. Die fietsryers het meer tyd spandeer in die “lae” hartspoed sone (43.1 % vs 58.5 %, onderskeidelik), in vergelyking met die “moeilike” hartspoed sone (7.4 % vs 6.1 %, onderskeidelik). Die ervare groep het statisties betekenisvol meer tyd in die “matige” hartspoed sone spandeer (49.5 % vs. 35.4 %) in vergelyking met die onervere groep. Die ervare groep het beter presteer tydens die kompetisie vir beide totale kompetisie tyd (P = 0.004) en algehele klassifikasie (P = 0.01). Relatiewe en absolute krag by aanvang van bloed laktaat akkumulasie was statisties betekenisvolle voorspellers van totale kompetisie tyd (P = 0.01 en 0.02, onderskeidelik), terwyl maksimale krag ‘n statisties betekenisvolle voorspeller was van algehele klassifikasie in die kompetisie (P = 0.02). Die totale tydtoets tyd was ‘n statisties betekenisvolle voorspeller van gemiddelde hartspoed tydens die kompetisie. Die studie het gewys dat hierdie multi-dag bergfiets kompetisie fisiologies baie uitdagend is en dat fietsryers uistekende uithouvermoë kapasiteit, sowel as krag en plofkrag moet besit. Die veranderlikes van die maksimale aërobiese toets het beter met prestasie in die veld gekorreleer as die veranderlikes van die gesimuleerde 40 km tydtoets. Daar word dus afgelei dat die standaard maksimale aërobiese toets voldoende is vir die toetsing van bergfietsryers en sportwetenskaplikes kan aanhou om hierdie toets te gebruik om oefeningsintensiteit sones voor te skryf vir oefensessies en kompetisies.
658

A Serra de Santa Catarina: um enclave subÃmido no sertÃo paraibano e a proposta de criaÃÃo de uma unidade de conservaÃÃo. / The Sierra de Santa Catarina: A sub-humid enclave in the backlands of Paraiba and the proposal to create a protected area.

Paulo Victor Paz de Sousa 28 December 2011 (has links)
FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico / The analysis of the vegetable covering of the Mountain range of Santa Catarina, located in the country district of SÃo Josà da Lagoa Tapada - PB, makes possible the identification of a gradient of vegetable covering, meeting from the occurrence of the shrub caatinga, shrub arboreal caatinga and arboreal caatinga. In that sense, it is looked for: to contribute with the analysis of the distribution of Atlantic forest species in sub-humid enclaves, inserted in the sertÃo of ParaÃba; to propose the creation of an Unit of Conservation for the affective protection of the atlantic forest ecosystems in refuge areas with superior altitudes to 600 meters of altitudes. For the execution of this work in the area in study, it is based in the theory of systems, theory of the redoubts and refuges and in the phytosociological. It will also be used in the interpretation of the landscape, the parameters phyto-ecological, morphopedologic, and vegetational happened during the Quaternary, in that verified glacial periods and interglacial / A anÃlise da cobertura vegetal da Serra de Santa Catarina, localizada no municÃpio de SÃo Josà da Lagoa Tapada â PB, possibilita a identificaÃÃo de um gradiente de cobertura vegetal, encontrando-se desde a ocorrÃncia da caatinga arbustiva, caatinga arbÃreo-arbustiva e caatinga arbÃrea. Em alguns locais especÃficos evidencia-se famÃlias e espÃcies vegetais caracterÃsticas de mata atlÃntica e/ou de ambientes de maior umidade. Nesse sentido, busca-se: contribuir com a anÃlise da distribuiÃÃo de espÃcies de mata atlÃntica em enclaves subÃmidos, inseridos no sertÃo paraibano; propor a criaÃÃo de uma Unidade de ConservaÃÃo para a efetiva proteÃÃo dos ecossistemas de Mata AtlÃntica em Ãreas de refÃgio com altitudes superiores a 600 metros de altitude. Para a execuÃÃo deste trabalho na Ãrea em estudo, fundamenta-se na teoria de sistemas, teoria dos redutos e refÃgios e em levantamentos florÃsticos. Utilizar-se-à tambÃm na interpretaÃÃo da paisagem, os parÃmetros fitoecolÃgicos, morfopedolÃgicos, e vegetacionais ocorridos durante o QuaternÃrio, em que se verificaram perÃodos glaciais e interglaciais
659

"Plunged Back with Redoubled Force": An Analysis of Selected Fiction, Non-Fiction, and Poetry of the Korean War

Tierney, John 09 June 2014 (has links)
No description available.
660

Physical Volcanology, Kinematics, Paleomagnetism, and Anisotropy of Magnetic Susceptibility of the Nathrop Volcanics, Colorado

Hernandez, Brett M. 17 June 2014 (has links)
No description available.

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