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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.
1

The invasion of bigheaded carps in the Tennessee River and Tennessee – Tombigbee Waterway

VanderBloemen, Spencer N 13 May 2022 (has links) (PDF)
The Ohio River Basin, including the Ohio, Cumberland, and Tennessee rivers, and the contiguous Tennessee - Tombigbee Waterway are under threat due to the ongoing invasion of bigheaded carps. In the Tennessee River, bigheaded carps were first documented in Kentucky Lake in 2004. I tested whether there were differences in abundance of Gizzard Shad, a competitor, before and after the bigheaded carps invasion, but no effects were detected. I also surveyed bigheaded carps colonization of Bay Springs Lake in the Tennessee - Tombigbee Waterway. Catch rates with gillnets were low and conformed with those documented elsewhere in the Ohio Basin considering distance from the Mississippi River.
2

Enhancing quality of life through aquatics therapy : effectiveness of adaptation of seating posture loading in a partially immersed aquatics therapy approach for the improved functioning and perceived competence of children with cerebral palsy, as reflected in their quality of life : a multiple case study

Shelef, Arie Niv January 2010 (has links)
An innovative Partially Immersed Approach, based on mixed principles of land and aquatic therapy theories was developed to enhance sitting adaptation and functioning in an Aquatics Therapy environment, thus improving quality of life for children with Cerebral Palsy. The approach aimed to enhance motor adaptation, engendering adaptation in psychosocial domains of quality of life. It employed a specially developed therapeutic treatment chair, in an unloading toward loading strategy, to regulate and control percentage of weight-bearing by manipulation of buoyancy (Archimedes principle). Participants were bilateral spastic hypertonia, Cerebral Palsy children, aged 10-15 years. Mixed-method methodology was used to investigate effectiveness of treatment, employing a small sample in a multiple case study. In conclusion, the developed approach enables aquatic therapy to be employed to improve motor function adaptation on land and consequently enhancing adaptation in other psychosocial domains - perceived competence, empowerment and motivation - thus improving quality of life for children with cerebral palsy, sustained at a one-year post-intervention test.
3

Uso de sistema wetland construído no pós-tratamento de efluente de curtume / Constructed wetland system use in the tannery industry wastewater post-treatment

Zacarkim, Carlos Eduardo 25 September 2006 (has links)
Made available in DSpace on 2017-07-10T17:37:06Z (GMT). No. of bitstreams: 1 Carlos Eduardo Zacarkim.pdf: 1740959 bytes, checksum: 9a3d103ef7901556f85a74ee94d57e40 (MD5) Previous issue date: 2006-09-25 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / Water contamination with heavy metals is a very important problem in the current world. Occurrence of toxic metals in pond and river water affects the lives of local people that depend upon these water sources for their daily requirements. Chromium is one of the toxic heavy metals, which is released into environment in effluents generated from tanneries and other industries. Conventional chemical methods for removal of toxic metals are ineffective when levels of metals in wastewaters are very low (between 10 - 100 ppm). Therefore, use of low cost, natural resources for removal of metal is being preferred over other conventional methods. Many plants have been known to accumulate heavy metals and other nutrients from contaminated waters and can be exploited for polishing of wastewaters. Aquatic macrophytes have been used during the last two decades for water metal removal competing with other secondary treatments, being the principal mechanism for metal uptake adsorption trough roots. As an alternative method, constructed wetlands have emerged as a viable option for addressing a wide range of water quality problems, especially in treating wastewater effluent. In tropical and subtropical regions, because of its abundance and the large biomass produced, the water hyacinth (Eichhornia crassipes) has been studied especially for this purpose. The main objective of the present study was to evaluate two constructed wetland in greenhouse for treating of tannery wastewater effluent, using two autochthonous floating macrophytes Eicchornia crassipes and Salvinia auriculata in order to remediate the contaminated industrial effluent, under natural conditions. The amount of wastewater generated by a tannery industry is ranged 30-50 L per kg of processed animal skins. Around of 10% of all wastewater effluent correspond to initial stage of animal skin processing into leather and 90% corresponding to intermediate and final process such as washing, neutralization and tinged. This work was performed at a 48-m2 greenhouse constructed in the Toledo Campus of the West Paraná State University, using wastewater effluents from a Tannery industry located in Toledo County. The experiences were carried out for three different hydraulic removal time: 4, 6 and 8 days. At each collection time, physic-chemical parameters such as Oxygen Chemical Demand (OCD), Inorganic Phosphorus and Total Kjeldahl Nitrogen (TKN), pH, Dissolved Oxygen (DO) were determined according to chemical standard methods, and Chromium, Sulfur, Aluminium and Iron total concentrations were calculated by PIXE technique. The second wastewater treatment wetland system working with aquatics plants Salvinia was excluded of these experiences due to tannery wastewaters were along the time in presence of different concentrations of contaminants, showing non-reliable results. Also, tannery wastewaters have shown very high concentrations of sulfur. In such conditions, salvinia species started showing toxicity symptoms and began to develop necrosis. On the other hand, the first wetland system working with the water hyacinth showed high contaminants removal percentages for all evaluated parameters / A quantidade de águas residuárias produzidas por um curtume variam entre 30-50L por quilograma de pele processada. Do total dos efluentes, cerca de 10% correspondem ao estágio inicial de fabricação do couro e o restante remanescente corresponde ? s demais etapas do processo como a neutralização, tintura, lavagem, etc. O uso de wetlands como alternativa no processo de tratamento de águas residuais vem sendo empregado como alternativa, visto a tecnologia e manejo simples e de baixo custo em relação a outros sistemas convencionais que, por apresentarem sistemas sofisticados de tratamento, proporcionam custos elevados. Visto ? problemática ambiental causada pela industria do couro, o presente trabalho avaliou um sistema wetland construído com macrófitas aquáticas flutuantes no pós-tratamento de efluente de um curtume de acabamento. A pesquisa foi realizada entre os dias 09/02 a 05/05/2006 na UNIOESTE/ Campus de Toledo, utilizando efluente proveniente de um curtume de acabamento de couro localizado no município de Toledo - PR, onde a matéria prima é o couro wet-blue. O estudo foi baseado em dois sistemas: um utilizando-se a macrófita Eicchornia crassipes e outro a macrófita Salvinia sp. Os parâmetros avaliados foram: DQO, Nitrogênio Total Kjeldahl NTK, Fosfato Total, pH, O2 Dissolvido, e os íons (Cr, S, Al e Fe). O sistema II, operado com a macrófita Salvinia sp., apresentou problemas em relação a concetração de nutrientes fornecidos pelo efluente do curtume optando-se em operar somente com o Sistema I, onde foram avaliados 3 tempos de detenção hidráulicas (4, 6 e 8 dias). O Sistema I apresentou reduções de 73,41% a 79,91% de DQO, 48,94% a 83,51% de Fósforo total, 59,24% a 67,93% de Nitrogênio total, 73,6% a 87,7% Cromo, 26,5% a 52% de Enxofre, 60 a 78% para o Ferro e 58,5% a 80,4% para o Alumínio. O principal limitante do sistema e o provável responsável pela morte das plantas no sistema II foi o Enxofre. De modo geral, o TDH de 6 dias foi o que apresentou melhores resultados em porcentagens de remoção. O sistema resultados promissores em termos de remoção a baixo custo operacional
4

Nacka Simarena / Aquatics Arena in   Nacka

Urumovic, David January 2018 (has links)
Using as a springboard the forthcoming development of Nacka into an urban cityscape, I aim to investigate the challenges and possibilities of designing and integrating a public building in this new context. My thesis project is a proposal for a new Aquatics Arena in central Nacka. The questions I have worked with all begin with the task of designing for the programme in accordance with the future environment, and producing value beyond the building itself. I have worked with a topographical concept. The main spaces are lowered into the ground and the sloping roofs have windows to allow desired daylight conditions. Besides the essential function an arena the programme is extended with spaces for a gym and health practitioners. The Aquatics Arena is accompanied by direct connections to a public space and elevators leading to a new subway station. The idea is to achieve a symbiosis between the three public entities and making the arena a civics centre in the growing city. / Genom att använda den kommande utvecklingen i Nacka mot en urban stadsbild som språngbräda vill jag undersöka de utmaningar och möjligheter som det innebär när man gestaltar och integrerar en publik byggnad i en ny kontext. Mitt examensarbete är ett förslag till en ny simarena i centrala Nacka. Frågorna som jag har jobbat med har alla sin grund i att utforma för programmet och den framtida miljön, att skapa mervärde utöver byggnadens egna värden. Jag har arbetat med ett topografiskt koncept. De viktigaste rummen är nedsänkta i marken och de sluttande taken har takfönster som ska tillåta önskade dagsljusförhållanden. Utöver de grundläggande funktionerna som simarena är programmet utökat med rum för en träningsanläggning och hyrbara rum för hälso- och friskvårds praktiker. Simarenan ligger i direkt anslutning till en publik plats och hisskoppling till en ny tunnelbanestation i centrala Nacka. Tanken är att de tre publika funktionerna ska fungera i symbios och utgöra ett medborgarcentrum i den nya, växande staden.
5

ADA Compliance and Accessibility of Aquatic Facilities in the North Texas Area

Pike, Hilary Eryn 05 1900 (has links)
The purpose of this study was to determine the degree to which existing aquatic facilities in the North Texas metroplex complied with the 1991 Americans with Disabilities Act Accessibility Guidelines (ADAAG) and the proposed Americans with Disabilities Act Accessibility Guidelines: Recreation Facilities (ADAAG supplement). Fifty-two aquatic facilities were evaluated based on: parking lot, ticket counter, gate/entry, restroom, dressing area, drinking fountain, pathway, and pool entry method structural domains. Physical measurements and a few direct observations were recorded on the survey instrument. Surveys were then reviewed and facility scores were tabulated. No facility was found to be 100% compliant with ADAAG and the ADAAG supplement. Aquatic facilities are already struggling to catch up with the 1991 ADAAG, but when the United States Department of Justice approves the proposed ADAAG supplement, aquatic facilities will fall even further behind.
6

Faculty Senate Minutes November 6, 2017

University of Arizona Faculty Senate 05 December 2017 (has links)
This item contains the agenda, minutes, and attachments for the Faculty Senate meeting on this date. There may be additional materials from the meeting available at the Faculty Center.

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