No description available.

No description available.

Unglazed transpired solar collectors (UTSCs) preheat makeup ventilation air for buildings, thereby reducing energy used for heating. The performance of the UTSC is dependent on the heat loss from the absorber plate, which is strongly affected by the wind speed. To date, correlations to determine UTSC heat loss are limited to flat or sinusoidal plate corrugations. In reality, trapezoidal corrugations have been added to UTSCs to provide them with structural stiffness. These corrugations prevent the attachment of the flow to the absorber plate and cause flow separation which increases the heat loss. In this study, a numerical simulation of a UTSC with trapezoidal shape corrugation has been performed to investigate the heat loss in the developing region due to wind on the UTSCs. It has been found that heat loss from new configuration is up to three times greater than the heat loss from a perforated flat absorber plate. A correlation of heat loss due to the wind speed and suction velocity was developed. This study also includes an evaluation of the effectiveness in the asymptotic region. In this case, wind speed had no effect. A correlation was derived in terms of suction velocity.

Thesis (Ph.D.)--Australian National University, 2004.

Thesis (M.F.A.)--Rochester Institute of Technology, 2008. / Typescript. Includes bibliographical references (leaves 33-34).

Thesis (Ph. D.)--University of Pittsburgh, 1991. / Includes bibliographical references (leaves lxiv-lxix).

Thesis (M.S.)--University of Wisconsin--Madison, 1982. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 131-132).

For many, a museum visit may consist of gazing at objects locked away in glass a cabinet accompanied by signs forbidding touch, and complex and often confusing text panels. But what message does this present to the visiting public? How can the public connect with museums and their collections if objects are beyond their reach? Why is handling reserved for the museum elite and not the general public? The value of touch and object handling in museums is a growing area of research, but also one that is not yet fully understood. Despite our range of senses with which we experience the world around us, museums traditionally rely on the visual as the principle means of communicating information about the past. However museums are increasingly required to prove their worth and value in society by becoming more accessible, not just in terms of audience but by opening up their stored collections, and government agenda is pushing for culture to feature in the everyday lives of the public. This research pulls apart the hierarchical nature of touch in the museum, demonstrating the benefits of a “hands-on” approach to engaging with the past, investigating the problems and limitations associated with tactile experiences, and puts forward a toolkit for tactile access to collections. It suggests that handling museum collections, not only enhances our understanding of the past, but provides memorable and valuable experiences that will remain with an individual for life.

CARVALHO, Everjane de. Representações sociais e práticas cotidianas de trabalhadores e trabalhadoras do lixo - a experiência do centro comunitário Santa Terezinha. 2004. 84 f. : Dissertação (mestrado) - Universidade Federal do Ceará, Mestrado em Desenvolvimento e Meio Ambiente, Fortaleza-CE, 2004. / Submitted by demia Maia (demiamlm@gmail.com) on 2016-05-13T14:02:47Z No. of bitstreams: 1 2004_dis_ecarvalho.pdf: 325080 bytes, checksum: 085476bac044ae68f1643004e4d48407 (MD5) / Approved for entry into archive by demia Maia (demiamlm@gmail.com) on 2016-05-13T14:03:41Z (GMT) No. of bitstreams: 1 2004_dis_ecarvalho.pdf: 325080 bytes, checksum: 085476bac044ae68f1643004e4d48407 (MD5) / Made available in DSpace on 2016-05-13T14:03:41Z (GMT). No. of bitstreams: 1 2004_dis_ecarvalho.pdf: 325080 bytes, checksum: 085476bac044ae68f1643004e4d48407 (MD5) Previous issue date: 2004 / O presente trabalho busca apreender as representações sociais de trabalhadores e trabalhadoras do lixo e suas práticas cotidianas, a partir da experiência do Centro Comunitário Santa Terezinha, com o Programa Reciclando - Rede Solidária de Coleta Seletiva. Parte-se do pressuposto de que as representações sociais se constroem no cotidiano e orientam as ações das pessoas. Nesse processo de interação entre a ação e as reflexões, as representações sociais modificam as práticas sociais e são modificadas pelas mesmas. Na reflexão acerca do trabalho realizado pelos agentes analisa-se a forma de ocupação espacial que se deu no morro Santa Terezinha bem como os novos sentidos atribuído às vias públicas como locus de trabalho e não como via de acesso que se dá nos bairros nobres ao redor do Morro. A pesquisa foi realizada com agentes recicladores do referido Centro. Os agentes buscam resignificar seu trabalho atribuindo um conjunto de regras que os diferenciam dos outros profissionais que se ocupam da mesma atividade na área da pesquisa. Dessa forma estes procuram superar os preconceitos existentes em relação à atividade da coleta. Observa-se que a coleta seletiva não se dá em virtude da ausência de um investimento em educação ambiental que possibilitaria a separação do lixo na própria fonte geradora. Os poucos clientes que separam é resultado da iniciativa pontual dos agentes que negociam em alguns condomínios essa separação. O cotidiano dos agentes consiste em percorrer as ruas e remexendo o lixo deixado nas calçadas recolher o material reciclável para posterior venda dos mesmos. Transitar nas ruas competindo com os carros representa um risco para os agentes. Outro risco a que estão submetidos é o de adquirir doenças em decorrência do contato direto com materiais contaminados. A falta de seguranças trabalhistas preocupa os agentes. Acredita-se que se impostos são pagos para assegurar a limpeza urbana esse trabalho deveria ser subsidiado pelo poder público de forma a garantir uma melhor condição de vida e trabalho aos agentes. Os problemas ambientais apontam para a urgência de um desenvolvimento sustentável para a sociedade. Educação ambiental e coleta seletiva do lixo são instrumentos fundamentais na luta pela sustentabilidade.

M.Ing. / The focus of the document is the development and use of an algorithm that controls a heliostat, and the high level design of that heliostat. The heliostat is only controlled by the algorithm and had a specified accuracy requirement equal to or better than 0.5 degrees. The algorithm uses the elevation and azimuth angle of sun calculated to an accuracy of 0.0003 degrees as input. The algorithm positions the heliostat to ensure a continuous reflection of sunlight into a predetermined direction for the purpose of indoor illumination. The position of the sunlight reflected into the predetermined direction is marked on a vertical grid-board placed orthogonal to the intended reflection direction. Ideally the sunlight positions marked throughout the day will all be in one location. The reflected sunlight deviated from the intended direction by only 0.28 degrees.