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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.
21

Application of Power Regenerative Boom system to excavator

Joo, Choonshik, Stangl, Martin January 2016 (has links)
This paper is presenting the application of Power Regenerative Boom(PRB) system to excavator. In order to increase the fuel efficiency of the excavator, potential energy of the front structure is recuperated by the hydraulic hybrid system with electric-hydraulic control, during boom down motion. Charged energy into accumulator is reused after boom down motion, the pressurized oil goes to hydraulic motor. The hydraulic motor is mounted on the engine PTO(Power Take-Off), therefore output torque of the hydraulic motor assists the diesel engine directy, it leads to decrease fuel consumption of diesel engine. After the system design and simulation investigation, the presented system was installed into Doosan’s 38ton excavator, DX380LC-3 model, and the energy saving result was verified by a digging and dumping repetition test. The test result shows that fuel consumption was dramatically decreased by 5.0 L/hr compared to the standard DX380LC-3.
22

"That Boy Ain't Right": How Disruptive Male Characters in Sitcom Satires Can Reinforce Normative Gender and Sexuality for the Dominant Audience

Nowak, Sarah M. 01 January 2010 (has links)
Why do we laugh at eight-year-old Butters Stotch when he sings about sodomy in South Park? How does the dominant audience understand Michael Scott to be heterosexual following his announcement that he would have sex with a male employee in the American version of The Office? What are the implications of laughing at Bobby Hill when his father expresses embarrassment over Bobby’s plus size modeling career in King of the Hill? I argue that the above characters are versions of the disruptive male character type common in sitcom satires. The sitcom satire is a hybrid genre that follows the sitcom format and contains satirical content. Using tools from queer theory and cultural studies, this thesis examines how particular examples of disruptive characters function in sitcom satires to reinforce cultural codes regarding gender and sexuality. In the first chapter, I suggest that when the male character disrupts normative gender and sexuality the audience laughs at the surprise and incongruity. I argue that the key feature of this character type is that he consistently disrupts cultural codes in ways that would normally mark him as homosexual yet he is not read as a gay character in the shows examined. I suggest that he is queer insofar as he does not fit neatly into the heterosexual/homosexual binary. Following this, in the second chapter, I explain how techniques used in the narrative; such as other characters' reactions, awkward silences, music selection, and scene changes, provide commentary on the disruption. I argue that characters that disrupt expectations of nonnative gender presentation and heterosexuality create anxiety for a dominant audience; the narrative commentary acknowledges that anxiety. Recognizing a character's disruption of cultural codes allows the dominant audience to relieve the anxiety and to reconcile the character's disruption with his heteronormative identity. Finally, in the third chapter I argue that the disruptive character often displays shame or pride in unexpected circumstances and is represented as ignorant I argue that by comparing normative behavior with disruptive or ignorant behavior, the narratives create the preferred or dominant meaning of the desirability of normative behavior. I conclude that the process of disruption, recuperation, and reinforcement reveals two perspectives. First, if disruptions confirm the desirability of the codes they attempt to subvert, then resisting these codes is difficult. Second. disruptions can reveal the construction of these codes; if these cultural codes were as natural as we are to believe, then our culture would not need to work as diligently to uphold them.
23

Aplicação de turfa na recuperação de solos degradados pela mineração de areia. / Environmental recuperation of sand mining disturbed soils by peat utilization.

Franchi, José Guilherme 21 August 2000 (has links)
A recuperação ambiental de áreas exploradas pela mineração de areia na região do Vale do Paraíba, Estado de São Paulo, constitui anseio popular, obrigação constitucional e fator de diferenciação dentro da mais moderna visão empresarial. Este trabalho estuda a aplicação de turfa como um melhorador de solos na etapa final do processo de recuperação destas áreas: o restabelecimento da vegetação nativa. O interesse surgiu da experiência de trabalho do autor com pesquisa mineral e tecnológica desta substância, além da observação e acompanhamento de alguns projetos de revegetação nestas áreas, tidas como ambientalmente sensíveis e onde os solos apresentam-se, via de regra, improdutivos; sua utilização representou, nestes casos, a diferença entre o sucesso e a necessidade de replantio. Apresenta-se uma revisão bibliográfica sobre turfa e suas propriedades agronômicas, bem como acerca da utilização de matéria orgânica na revegetação de áreas degradadas. O estudo constituiu um comparativo entre resultados de ensaios efetuados em amostras de solo provenientes de área abandonada pela mineração de areia, homogeneizadas em laboratório em seu estado original (branco), de um lado, e com adição de turfa em diferentes proporções, de outro, visando aferir se alguma delas poderia adequar-se mais satisfatoriamente à melhoria das condições gerais do solo em questão. Foram analisadas variações em propriedades químicas e físicas como retenção de cátions, efeito tampão, densidade aparente, condutividade hidráulica e porosidade. Abre-se a possibilidade de os resultados deste projeto não se limitarem apenas à Indústria Mineral mas estenderem-se a outros setores onde haja a necessidade de recuperação de solos, fornecendo subsídios a eventuais modificações no manejo de solos agricultáveis, com perspectivas de geração de economia de recursos em irrigação, fertilizantes e defensivos agrícolas. / The environmental recuperation of areas explored by sand mining in the Vale do Paraíba region, in the State of São Paulo, is a popular aspiration, a constitutional obligation and constitutes a differentiating factor in the visions of modern enterprise. This work studies the utilization of peat as a soil conditioner in the final stage of the recuperation process for these areas: the revival of indigenous vegetation. This idea arose from the author's experience in technological and mineral research into peat, coupled with the observation and monitoring of these environmentally sensitive areas, whose soils were, from an agricultural stance, generally unproductive. The utilization of peat, in these cases, represented the difference between success and the necessity for a replantation process. This study presents a review of the agronomic properties of peat as well as the application of organic matter in the revegetation of damaged land. It is a comparative study between laboratory assay results from soil samples in their original state, and those where the soil has variable peat contents, seeking to ascertain which, if any, results in better general conditions for that particular soil. Both physical and chemical properties were analyzed, with an emphasis on cation exchange capacity, buffering, bulk density, hydraulic conductivity and porosity. There is a possibility that the results of this project can extended beyond the Mineral Industry to other sectors, where there are needs for soil recuperation, leading to cost savings for irrigation, fertilizers and agrotoxic compounds in food production areas.
24

Propriedade fiduciária: bens móveis e imóveis / Fiduciary ownership: real and personal property

Carvalho, Maria Serina Areias de 05 May 2009 (has links)
A presente dissertação começa com a evolução histórica de dois importantes institutos jurídicos, a fidúcia e a propriedade, a partir das raízes romanas. Já no direito brasileiro analisamos o conceito de negócio fiduciário e figuras afins, então passamos a estudar o contrato de alienação fiduciária. Em seguida abordamos a propriedade fiduciária, sua evolução legislativa no direito pátrio, e seus desdobramentos envolvendo móveis e imóveis, onde estabelecemos o conceito, a natureza jurídica, seus elementos constitutivos, e as conseqüências de seu inadimplemento. Não olvidamos o aspecto processual e as questões controvertidas, como a falência, a recuperação judicial e o cabimento ou não da prisão civil, dentre outros. No decorrer deste trabalho procuramos analisar crítica e comparativamente as figuras afins ao instituto da propriedade fiduciária e estabelecer as similitudes e diferenças em cada sistema estudado, assim como individualizar estes institutos previstos no Código Civil de 2002 e na Lei n. 9.514/97. Enfim, nosso estudo não estaria completo sem pesquisar a fidúcia nos sistemas francês, italiano e anglo-americano. / This paper begins with the historical evolution of two important legal institutes, trust and ownership, since the Roman roots. However, in Brazilian law we analyze the concept of deed of trust and similar institutions, thus we will study the chattel mortgage agreement. Afterward, we will focus fiduciary ownership, its legal evolution in the Brazilian law, as well as, its divisions involving real and personal property, in which we set forth the concept, legal nature, its constitutive elements and the consequences arisen from its non-performance. We have not forgotten the procedural aspect and controversial issues as: bankruptcy, judicial recuperation and the acceptance or not of civil imprisonment, among others. During this work we tried to analyze both critically and comparatively, similar figures of the fiduciary ownership institute and establish the similarities and differences in each of the systems we studied, as well as individualize the institutes provided in the Civil Code of 2002 and in Act No. 9.514/97. Finally, our study would not be complete without researching trust in the French, Italian and Anglo-American systems.
25

Propriedade fiduciária: bens móveis e imóveis / Fiduciary ownership: real and personal property

Maria Serina Areias de Carvalho 05 May 2009 (has links)
A presente dissertação começa com a evolução histórica de dois importantes institutos jurídicos, a fidúcia e a propriedade, a partir das raízes romanas. Já no direito brasileiro analisamos o conceito de negócio fiduciário e figuras afins, então passamos a estudar o contrato de alienação fiduciária. Em seguida abordamos a propriedade fiduciária, sua evolução legislativa no direito pátrio, e seus desdobramentos envolvendo móveis e imóveis, onde estabelecemos o conceito, a natureza jurídica, seus elementos constitutivos, e as conseqüências de seu inadimplemento. Não olvidamos o aspecto processual e as questões controvertidas, como a falência, a recuperação judicial e o cabimento ou não da prisão civil, dentre outros. No decorrer deste trabalho procuramos analisar crítica e comparativamente as figuras afins ao instituto da propriedade fiduciária e estabelecer as similitudes e diferenças em cada sistema estudado, assim como individualizar estes institutos previstos no Código Civil de 2002 e na Lei n. 9.514/97. Enfim, nosso estudo não estaria completo sem pesquisar a fidúcia nos sistemas francês, italiano e anglo-americano. / This paper begins with the historical evolution of two important legal institutes, trust and ownership, since the Roman roots. However, in Brazilian law we analyze the concept of deed of trust and similar institutions, thus we will study the chattel mortgage agreement. Afterward, we will focus fiduciary ownership, its legal evolution in the Brazilian law, as well as, its divisions involving real and personal property, in which we set forth the concept, legal nature, its constitutive elements and the consequences arisen from its non-performance. We have not forgotten the procedural aspect and controversial issues as: bankruptcy, judicial recuperation and the acceptance or not of civil imprisonment, among others. During this work we tried to analyze both critically and comparatively, similar figures of the fiduciary ownership institute and establish the similarities and differences in each of the systems we studied, as well as individualize the institutes provided in the Civil Code of 2002 and in Act No. 9.514/97. Finally, our study would not be complete without researching trust in the French, Italian and Anglo-American systems.
26

Planejamento básico para recuperação de área degradada em ambiente urbano / Planejamento básico para recuperação de área degradada em ambiente urbano / Planejamento básico para recuperação de área degradada em ambiente urbano

Manoelina, Waldenize do Nascimento 10 April 2018 (has links)
One of the main problems of urban land use is the environmental impacts caused by inadequate use of it. This worry comes from the moment that there is lack of preserved areas in cities due to land occupation and inadequate planning for urban use. This paper tries to establish in a systematized form a reference on planning for recuperation of degraded areas in urbanenvironments emphasizing some basic aspects to the recuperation of those. / Uno de los principales problemas de ocupación del suelo urbano son los impactos ambientales causados por su uso inadecuado. Esta preocupación se inicia en el momento cuando se nota la escasez de áreas reservadas en las ciudades debido al crecimiento urbano y a la falta de planifi- cación. En este artículo se trata de establecer de manera sistematizada una referencia sobre el planeamiento para la recuperación de áreas degradadas en ambiente urbano resaltando algunos aspectos básicos para la recuperación de las mismas. / Um dos principais problemas da ocupação do solo urbano são os impactos ambientais causadospelo uso inadequado deste. Sua preocupação se da a partir do momento em que a escassez de áreas preservadas nas cidades devido à ocupação e ao não planejamento adequado do uso urba- no. Este artigo procura estabelecer de forma sistematizada uma referencia sobre planejamento para recuperação de áreas degradadas em ambiente urbano ressaltando alguns aspectos básicospara recuperação das mesmas.
27

Aplicação de turfa na recuperação de solos degradados pela mineração de areia. / Environmental recuperation of sand mining disturbed soils by peat utilization.

José Guilherme Franchi 21 August 2000 (has links)
A recuperação ambiental de áreas exploradas pela mineração de areia na região do Vale do Paraíba, Estado de São Paulo, constitui anseio popular, obrigação constitucional e fator de diferenciação dentro da mais moderna visão empresarial. Este trabalho estuda a aplicação de turfa como um melhorador de solos na etapa final do processo de recuperação destas áreas: o restabelecimento da vegetação nativa. O interesse surgiu da experiência de trabalho do autor com pesquisa mineral e tecnológica desta substância, além da observação e acompanhamento de alguns projetos de revegetação nestas áreas, tidas como ambientalmente sensíveis e onde os solos apresentam-se, via de regra, improdutivos; sua utilização representou, nestes casos, a diferença entre o sucesso e a necessidade de replantio. Apresenta-se uma revisão bibliográfica sobre turfa e suas propriedades agronômicas, bem como acerca da utilização de matéria orgânica na revegetação de áreas degradadas. O estudo constituiu um comparativo entre resultados de ensaios efetuados em amostras de solo provenientes de área abandonada pela mineração de areia, homogeneizadas em laboratório em seu estado original (branco), de um lado, e com adição de turfa em diferentes proporções, de outro, visando aferir se alguma delas poderia adequar-se mais satisfatoriamente à melhoria das condições gerais do solo em questão. Foram analisadas variações em propriedades químicas e físicas como retenção de cátions, efeito tampão, densidade aparente, condutividade hidráulica e porosidade. Abre-se a possibilidade de os resultados deste projeto não se limitarem apenas à Indústria Mineral mas estenderem-se a outros setores onde haja a necessidade de recuperação de solos, fornecendo subsídios a eventuais modificações no manejo de solos agricultáveis, com perspectivas de geração de economia de recursos em irrigação, fertilizantes e defensivos agrícolas. / The environmental recuperation of areas explored by sand mining in the Vale do Paraíba region, in the State of São Paulo, is a popular aspiration, a constitutional obligation and constitutes a differentiating factor in the visions of modern enterprise. This work studies the utilization of peat as a soil conditioner in the final stage of the recuperation process for these areas: the revival of indigenous vegetation. This idea arose from the author's experience in technological and mineral research into peat, coupled with the observation and monitoring of these environmentally sensitive areas, whose soils were, from an agricultural stance, generally unproductive. The utilization of peat, in these cases, represented the difference between success and the necessity for a replantation process. This study presents a review of the agronomic properties of peat as well as the application of organic matter in the revegetation of damaged land. It is a comparative study between laboratory assay results from soil samples in their original state, and those where the soil has variable peat contents, seeking to ascertain which, if any, results in better general conditions for that particular soil. Both physical and chemical properties were analyzed, with an emphasis on cation exchange capacity, buffering, bulk density, hydraulic conductivity and porosity. There is a possibility that the results of this project can extended beyond the Mineral Industry to other sectors, where there are needs for soil recuperation, leading to cost savings for irrigation, fertilizers and agrotoxic compounds in food production areas.
28

Návrh větrání a chlazení v multifunkční budově se zubními ordinacemi / Ventilation and air-conditioning in a mixed-use building with dental offices

Truksa, Ondřej January 2018 (has links)
The aim of the master’s thesis was to design ventilation and cooling systems in a three-storey mixed-use building, which contained three apartments and two dentists’ surgeries. Two independent ventilation systems were designed in the building, with respect to different purposes of the indoor spaces. The mechanical cooling system was proposed in some of the rooms to improve thermal comfort in summer. The thesis includes calculations of building heat gains, heat losses, air exchange rates and the dimensioning of the ventilation and cooling systems. The thesis also comprises design calculations and technical drawing.
29

Rekuperace energie ze spalin naftového motoru užitkového vozidla / Exhaust Gas Energy Recuperation in a Commercial Vehicle Diesel Engine

Šroba, Roman January 2020 (has links)
The scope of this thesis investigates value added by a turbocharger with an associated motor-generator unit to a diesel engine used by a commercial vehicle. A thermodynamic model of the engine was prepared in GT-SUITE software. Case studies were primary focused on a reduction of specific fuel consumption as well as a nitrogen oxides production using an energy recuperation of exhaust gas. Furthermore, there are described potential benefits of using an electric assistance in order to increase an exhaust gas temperature during a steady state engine operation. Additionally, there is an investigation of potential benefits of a turbocharger assistance in a transition engine mode operating during rapid acceleration of the vehicle. The results of individual analysis will be taken into account for a selection of turbocharger regarding specific engine implementation. The results of simulation suggest that it is possible to lower specific fuel consumption, production of nitrogen oxides, as well as accelerate turbocharger response.
30

Návrh vytápění a nuceného větrání pro rodinný dům Doubrava / Heating and ventilation in the "Doubrava" family house

Jirsová, Tereza January 2021 (has links)
The diploma thesis is focused on the design of heating and forced ventilation for the project of the family house Doubrava. In the first two chapters is briefly described the theory and there is also described the project of the family house. The next chapter deals with the design of the forced equal pressure ventilation with the heat and moisture recovery. Than the heat loss are calculated according to the norm ČSN EN 12831-1. The next part is focused on the design of heating system and the heat source for the family house Doubrava. There is described detailed design of the floor heating, including necessary calculations, and also the type of the heat pump, as the heat source and source for hot water heating, is chosen. This part also contains a selection of expansion tank and safety valve and approximate calculation of the size of the primar circuit. The last part deals with the possibilities of using renewable energy sources. At the end of the thesis, there are more detailed results of the calculations and the mechanical drawings of individual designs of the ventilation and heating system and also there are tables of the acquisition costs.

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