Dissertations / Theses on the topic 'Medium density'
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Timlett, Rose. "Recycling in high and medium density housing." Thesis, University of Southampton, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543417.
Full textPlosz, Laura Marlayne. "Multiplicity through abstraction, a design for medium-density housing." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0025/MQ50309.pdf.
Full textEugênio, Rafael Augusto Pinholati [UNESP]. "Painéis de medium density fiberboard produzidos com adesivo alternativo." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/145030.
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O trabalho consistiu na produção de painéis de MDF (Medium Density Fiberboard) em escala laboratorial utilizando o adesivo PVA (Poliacetato de Vinila), variando suas concentrações e realizando misturas com a resina comumente empregada neste processo, o adesivo a base de uréia-fomaldeído, onde foi avaliado além das características físicas e mecânicas dos painéis produzidos, também teve o intuito de verificar o desprendimento de formaldeído para o ambiente quando aplicado juntamente com a resina uréia-fomaldeído, e a avaliação dos perfis de densidades dos traços. As amostras foram confeccionadas com fibra de eucalipto, onde as dosagens do adesivo PVA seguiram as seguintes proporções: 30%, 50% e 70%, e para efeito de comparação com as amostras produzidas com a mistura de PVA foram fabricadas provas em branco com 100% uréia-formaldeído. No total foram produzidas 16 amostras, quatro painéis de cada traço, e retirados os corpos de prova que posteriormente foram avaliados conforme a NBR 15316-2:2015 para as condições secas. Todos os insumos foram fornecidos pelo fabricante de painéis Duratex SA, e os testes foram realizados nos laboratórios da empresa. O adesivo PVA mostrou-se bastante favorável, apresentando grande compatibilidade com os demais componentes da formulação, apresentando potencial para fabricação de MDF. Diversos traços conseguiram atender os requisitos da norma, com destaque para módulo de ruptura (MOR), módulo de elasticidade (MOE), obtidos atraves do ensaio de flexão estática, e o teor de umidade. Houve também uma discreta redução na emissão de formol em dois traços (T3 e T4), e na avaliação dos perfis de densidade foi constatado que a formulação dos traços não impactou nas densidades médias da espessura dos painéis.
The work consisted in the production of MDF (Medium Density Fiberboard) in laboratory scale using PVA adhesive (Polyacetate Vinyl Chloride), varying their concentrations and performing mixtures with commonly used resin in this process, the adhesive base of ureafomaldehyde, which was evaluated in addition to the physical and mechanical characteristics of the panels produced, also aimed to check the formaldehyde release to the environment when applied together with resin urea-fomaldehyde, and evaluation of the densities of the features profiles. The samples were made from eucalyptus fibers where PVA adhesive doses followed the following proportions: 30%, 50% and 70%, and for the purpose of comparison with the samples produced with the mixture of PVA blank tests were made with 100 % ureaformaldehyde. In total, we produced 16 samples, four panels of each stroke, and removed the specimens which were then evaluated according to NBR 15316-2: 2015 for dry conditions. All inputs were provided by the panel manufacturer Duratex SA, and the tests were performed in the company's laboratories. PVA adhesive proved to be very favorable, with high compatibility with the other components of the formulation, with potential for the production of MDF. Many features were able to meet the standard requirements, particularly modulus of rupture (MOR), modulus of elasticity (MOE), obtained through the bending, and moisture content test. There was also a slight reduction in formaldehyde emissions by two dashes (T3 and T4), and evaluation of density profiles was found that the formulation of the traits did not affect the average thickness of the thickness of the panels.
Eugênio, Rafael Augusto Pinholati. "Painéis de medium density fiberboard produzidos com adesivo alternativo /." Bauru, 2016. http://hdl.handle.net/11449/145030.
Full textBanca: Rosane Aparecida G. Basttistelle
Banca: Alexandre Jorge Duarte Souza
Resumo: O trabalho consistiu na produção de painéis de MDF (Medium Density Fiberboard) em escala laboratorial utilizando o adesivo PVA (Poliacetato de Vinila), variando suas concentrações e realizando misturas com a resina comumente empregada neste processo, o adesivo a base de uréia-fomaldeído, onde foi avaliado além das características físicas e mecânicas dos painéis produzidos, também teve o intuito de verificar o desprendimento de formaldeído para o ambiente quando aplicado juntamente com a resina uréia-fomaldeído, e a avaliação dos perfis de densidades dos traços. As amostras foram confeccionadas com fibra de eucalipto, onde as dosagens do adesivo PVA seguiram as seguintes proporções: 30%, 50% e 70%, e para efeito de comparação com as amostras produzidas com a mistura de PVA foram fabricadas provas em branco com 100% uréia-formaldeído. No total foram produzidas 16 amostras, quatro painéis de cada traço, e retirados os corpos de prova que posteriormente foram avaliados conforme a NBR 15316-2:2015 para as condições secas. Todos os insumos foram fornecidos pelo fabricante de painéis Duratex SA, e os testes foram realizados nos laboratórios da empresa. O adesivo PVA mostrou-se bastante favorável, apresentando grande compatibilidade com os demais componentes da formulação, apresentando potencial para fabricação de MDF. Diversos traços conseguiram atender os requisitos da norma, com destaque para módulo de ruptura (MOR), módulo de elasticidade (MOE), obtidos atraves do ensaio de flexã... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The work consisted in the production of MDF (Medium Density Fiberboard) in laboratory seade using PVA adhesive (Polyacetate Chloride), varying their concentration and perfomring mixtures with commonly used resin in this process the adhesive base of urea-fomaldehyde, which was evaluated in addition to the physical and mechanical characteristics of the panels produced, also aimed to check the formaldehyde release to the environment when applied together with resin urea-formaldehyde, and evaluation of the desnsities of the features profiles. The samples were made from eucalyptus fibers where PVA adhesive doses followed proportions: 30%, 50% and 70%, and for the purpose of comparison with the samples produced with the samples produced with the mixture of PVA blank tests were made with 100% urea-formaldehyde. In total, we produced 16 samples, four panels of each stroke, and removed the speciments which then evaluated according to NBR 15316-2:2015 for dry conditions. All inputs were provided by the panel manufacturer Duratex SA, and the tests were performed in the company's laboratories. PVA adhesive proved to be very favorable, with high compatibility with the other components of the formulation, with potential for the production of MDF. Many features were able to meet the standard requirements, particularly modulus of rupture (MOR), modulus of elasticity (MOE), obtained through the bending, and moisture content test. There was also a slight reduction in formaldehyde emissions by two dashes (T3 and T4), and evaluation of density profiles was found that the formulation of the traits did not affect the average thickness of the thickness of the panels
Mestre
Ezzat, Showaib A. "Fatigue acceleration of crack growth in medium density polyethylene." Case Western Reserve University School of Graduate Studies / OhioLINK, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=case1057004988.
Full textAlves, Thomas. "Managing medium density housing development a municipal case study /." Swinburne Research Bank, 2006. http://hdl.handle.net/1959.3/22539.
Full textThesis submitted in fulfillment of the requirements of the degree of Doctor of Philosophy, Institute for Social Research, Swinburne University of Technology, 2006. Typescript. 'December 2006'. Includes bibliographical references (p. 303-326).
Chapman, Kelvin M. "A study of two aspects of medium density fibreboard manufacture." Thesis, University of Canterbury. Chemical and Process Engineering, 2004. http://hdl.handle.net/10092/7188.
Full textPalmer, Simon J. "Stabilisation of medium density polyethylene gas pipe in service applications." Thesis, Manchester Metropolitan University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329807.
Full textKocabas, Zeynep. "Forecasting Of Ionospheric Electron Density Trough For Characterization Of Aerospace Medium." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610445/index.pdf.
Full textDu, Wei 1962. "A study of medium-rise high-density housing : Beijing, 1979-1990." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22542.
Full textFocusing on the aspects of single building design and site planning, this thesis analyses the methods to reach high building densities in medium-rise mass housing design in Beijing from 1979 to 1990. The study is conducted through the review of the socio-economic issues and the introduction of mass housing design of the country. It intends to see the interrelationships between ways to attain high building densities and the socio-economic backgrounds.
The research indicates that methods to reach high building densities are many. Ways used in Beijing during 1980s were based on the socio-economic system at the time being. These ways are not appropriate in terms of the unique urban context of the city and could be thus replaced by others.
Dettmer, Jörn. "Properties comparison of North American manufactured particleboard and medium density fiberboard." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/45575.
Full textVan, Velthoven P. J. F. "Medium scale irregularities in the ionospheric electron content." Utrecht : Drukkerij Elinkwijk, 1990. http://catalog.hathitrust.org/api/volumes/oclc/22643184.html.
Full textO'Dwyer, Lisel Alice. "Medium density housing in Adelaide : a study of market led housing provision /." Title page, contents and abstract only, 1992. http://web4.library.adelaide.edu.au/theses/09AR/09aro27.pdf.
Full textVujanovic, Gojko. "A theoretical model for the in-medium spectral density of vector mesons /." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=111618.
Full textZerizer, Abdellatif. "Contribution à l'étude de l'usinabilité du M. D. F. (Medium density fiberboard)." Nancy 1, 1991. http://www.theses.fr/1991NAN10335.
Full textV, Tromsa Ye. "FEATURES OF ARCHITECTURAL-PLANNING ORGANIZATION OF MEDIUM-RISE HIGH-DENSITY RESIDENTIAL HOUSING." Thesis, ПОЛІТ.Сучасні проблеми науки.Гуманітарні науки:тези доповідей XVII Міжнародної науково-практичної конференції молодих учених і студентів:[y 2-x т.].Т.2(м.Київ,4-7 квітня 2017 р.)/[ред.кол.:В.М.Ісаєнко та ін.]; Національний авіаційний університет.-К.:НАУ,2017.-374 с, 2017. http://er.nau.edu.ua/handle/NAU/27739.
Full textTheado, John. "An Optimal Medium-Strength Regularity Algorithm for 3-uniform Hypergraphs." Scholar Commons, 2019. https://scholarcommons.usf.edu/etd/7969.
Full textMuller-Warrens, Marianne. "Towards sustainable building design principles for medium density, middle income housing in Gauteng." Diss., Pretoria : [s.n.], 2001. http://upetd.up.ac.za/thesis/available/etd-08132008-112233.
Full textFisher, Susan. "Landscape alternatives for cost savings and resource conservation in medium-density Canadian housing." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69774.
Full textThe five options were simulated using the proposed site and building of a low-rise, multi-residential housing project in Ottawa, where only the planting design varied for each simulation. The four alternatives involved: (1) replacing 70% of lawn areas with woody plants grouped in mulched beds, (2) eliminating turf and including 85% woody plants and a hard surface area of 15%, (3) replacing 70% of the turf area with naturalized woodland plantings and (4) replacing all turf areas with 85% naturalized woodland and tall grass prairie plantings and including a hard surface area of 15%. Only species that are well-adapted to the site conditions were selected for the alternatives. (Abstract shortened by UMI.)
Walther, Marc. "Variable-Density Flow Processes in Porous Media On Small, Medium and Regional Scales." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-153365.
Full textGuimarães, Íngrid Luz. "Aproveitamento de resíduo de soja para produção de painéis MDP (Medium Density Particleboard)." Universidade Federal de Goiás, 2017. http://repositorio.bc.ufg.br/tede/handle/tede/7520.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Soybean pre-cleaning residue is found in large quantities in the processing and processing dryers' farms, resulting in serious inconvenience if it is not removed to farther places before the fermentation process begins. Among the residues generated at the time of harvesting and cleaning of the grains are soybean pods, which presents as an alternative lignocellulosic material to be used in the production of Agglomerated panels of the MDP type. The objective of this work was to verify the effect of the use of soybean pods in the production of eucalyptus MDP panels. The panels, with a nominal density of 0.70 g / cm³, were composed of three layers, the thin layers of eucalyptus wood were used in the covers and the core was composed of a mixture of eucalyptus particles and soybean pods. The proportions used of soybean residue particles in relation to those of eucalyptus in the kernels were 0, 25, 50, 75 and 100%. For the glueing of the particles the adhesive urea formaldehyde, in the proportion of 12%, was used for both the covers and the crumb. The pressing cycle had a temperature of 160 ° C for a period of 15 minutes at a pressure of 4MPa. To evaluate the quality of the panels produced, their physical and mechanical properties of apparent density; Compaction ratio; Water absorption and swelling in thickness at 2 and 24 hours of immersion were determinater; Perpendicular traction; Modulus of elasticity and modulus of rupture in the static bending. To meet the requirements of Brazilian standard (NBR 14.810 / 2002), for the properties of swelling in thickness (2h) and modulus of rupture, the maximum amount of soybean recommended for MDP panels is 20%.
O resíduo da pré-limpeza de soja é encontrado em grande quantidade no pátio das indústrias de beneficiamento e dos secadores das fazendas, acarretando sérios transtornos caso não seja removido para locais mais afastados antes que o processo de fermentação se inicie. Dentre os resíduos gerados no momento da colheita e limpeza dos grãos estão às vagens de soja, que se apresenta como um material lignocelulósico alternativo para ser utilizado na produção de painéis aglomerados do tipo MDP. Este trabalho teve como objetivo verificar o efeito da utilização de vagens de soja na produção de painéis MDP de eucalipto. Os painéis, com densidade nominal de 0,70 g/cm³, foram constituídos por três camadas, de modo que nas capas foram utilizadas finas partículas de madeira de eucalipto e o miolo foi composto por uma mistura de partículas de eucalipto e de vagens soja. As proporções utilizadas de partículas de resíduo de soja em relação às de eucalipto no miolo foram de 0, 25, 50, 75 e 100%. Para o encolamento das partículas foi utilizado o adesivo uréia formaldeído, na proporção de 12%, tanto para as capas como para o miolo. O ciclo de prensagem teve temperatura de 160°C, por um período de 15 minutos a uma pressão de 4MPa. Para avaliar a qualidade dos painéis produzidos, foram determinadas suas propriedades físicas e mecânicas de densidade aparente; razão de compactação; absorção de água e inchamento em espessura em 2 e 24 horas de imersão; tração perpendicular; módulo de elasticidade e módulo de ruptura na flexão estática. Para atender as exigências da norma brasileira (NBR 14.810/2002), para as propriedades de inchamento em espessura (2h) e módulo de ruptura, a quantidade máxima de vagem de soja recomendada para painéis MDP é de 20%.
Gillah, Peter Reuben. "The influence of novel forming techniques on the properties of medium density fibreboard." Thesis, Bucks New University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369910.
Full textMuto, Ryotaro. "Evidence for in-medium modification of the φ meson at normal nuclear density." 京都大学 (Kyoto University), 2007. http://hdl.handle.net/2433/136956.
Full textVan, Rooyen Petrus Mynhardt. "Is it feasable to increase the medium density fibreboard manufacturing capability in South Africa?" Thesis, Port Elizabeth Technikon, 2004. http://hdl.handle.net/10948/255.
Full textPark, Byung Dae. "Cure acceleration of phenol-formaldehyde (PF) adhesives for three-layer medium density fiberboard (MDF)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ39388.pdf.
Full textYoud, Stephen John. "The effects of crosslinking in the fracture properties of high and medium density polyethylene." Thesis, Manchester Metropolitan University, 1991. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306251.
Full textBailey, Melissa. "Urban consolidation and residential restructuring in Adelaide : a study of people in medium density housing /." Title page, contents and abstract only, 1993. http://web4.library.adelaide.edu.au/theses/09AR/09arb155.pdf.
Full textCastro, Eduardo Martins de. "Estudo da usinabilidade de chapas MDF (Medium Density Fiberboard) para usinagem de desbaste e acabamento." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-16092016-110705/.
Full textThis work presents a MDF (Medium Density Fiberboard) machinability study aiming to carry out a cutting performance analysis regarding to surface quality and parallel specific cutting force, in order to verify the cutting parameters effect on the finishing and roughing machining operations, respectively. In the finishing study, it was verified the effect of the cutting thickness, cutting speed and direction of cutterhead rotation with relation to feed direction, in peripheral milling, on the MDF edges surface roughness. The surfaces were developed by a moulder, which roughness were measured by a stylus perfilometer. In the roughing study, the parallel specific cutting force was assessed in relation to the variation of the rake angle, cutting thickness and depth of cut, for the orthogonal cut. For this, it was used a planing machine and a resistance dynamometer, coupled in a data acquisition and analysis system. From the analysis of the obtained results, it was possible to identify the influence of each cutting parameter considered.
Karol, Elizabeth. "Energy efficient design in housing of small floor area : appropriateness in housing for the aged." Thesis, Curtin University, 2003. http://hdl.handle.net/20.500.11937/902.
Full textBueno, Marcus Antonio Pereira [UNESP]. "Painéis de Medium Density Fiberboard fabricados com bagaço de cana-de-açúcar e madeira de reflorestamento." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/124122.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O objetivo deste trabalho foi analisar as potencialidades da utilização do bagaço de cana-de-açúcar (SC) aplicado aos painéis de MDF (Medium Density Fiberboard), juntamente com fibras de madeira de reflorestamento (WR) da espécie eucalipto, na indústria moveleira e de construção civil. Neste estudo, foram produzidos painéis de MDF em quatro traços: 100% WR (T2), 33%SC+67%WR (T3), 67%SC+33%WR (T4) e 100% SC (T5). Também foram analisadas as propriedades físicas e mecânicas, segundo a norma brasileira NBR 15316-3 (2009). A densidade alvo dos painéis foi de 700 kg/m, definida como painel de média densidade. Também foi realizado o ensaio por microscopia eletrônica de varredura, (MEV) para se obter e constatar o perfil do topo ou face do painel (parte que fica em contato com os pratos da prensa), e da parte usinada ou parte interna do painel. O adesivo utilizado foi a uréia-formaldeído, na proporção de 10% da massa total do painel. Os resultados analisados indicaram que o traço com 100% SC (T5) apresentou o melhor desempenho entre os trapos, atingidos em alguns casos os valores recomendados pela NBR 15316-2 (2009). Pelos resultados averiguados o bagaço de cana-de-açúcar apresentou bom potencial para a fabricação de painéis MDF, devendo ser estudado com maior aprimoramento
The objective of this study was to analyze the potentialities of using sugarcane bagasse (SC) applied to MDF panels (Medium Density Fiberboard), along with reflorestation wood fibers (WR) of eucalyptus species, in the industry of furniture and construction. In this study, it was produced panels of MDF in four traces: 100% WR (T2), 33% SC+67% WR (T3), 67% SC+33% WR (T4) and 100% SC (T5). Also it was analyzed its physical and mechanical properties, according to the Brazilian standard NBR 15316-3 (2009). The target density of the panels was 700 kg/m, defined as medium density fiberboard. In addition it was carried out surface analysis of the top and the internal part of the panel through Scanning Electron Microscopy (SEM). The panels were bonded with urea-formaldehyde, in the proportion of 10% by mass of the panel. The results indicated that the trace with 100% SC (T5) showed the best performance among the traces, reaching, in some cases, the values recommended by NBR 15316-2 (2009). This results shows the possibility of using sugarcane bagasse for the production of MDF panels, however it is recommended more studies to improve its physical and mechanical characteristics
Sitz, Evan Donald. "Processing and Manufacture of Soybean and Wheat Straw Medium Density Fiberboard Utilizing Epoxidized Sucrose Soyate Resin." Thesis, North Dakota State University, 2016. https://hdl.handle.net/10365/27990.
Full textNorth Dakota Soybean Council and the North Dakota Industrial Commission
De, la Harpe Jeanette Carol. "Social factors affecting the design and management of state-subsidised medium-density housing in Cape Town." Master's thesis, University of Cape Town, 2007. http://hdl.handle.net/11427/5058.
Full textMany urban planners and designers have recognised the notable discrepancy between state policy in recent years supporting the densification of urban housing development, and broad acceptance of this approach by residents, in particular recipients of state-subsidised housing. This study sought to investigate the reasons for this in acknowledgement of the negative experiences of these residents, and to produce findings that could help to reduce the drawbacks still strongly associated with densified housing estates.
Bueno, Marcus Antonio Pereira. "Painéis de Medium Density Fiberboard fabricados com bagaço de cana-de-açúcar e madeira de reflorestamento /." Bauru, 2014. http://hdl.handle.net/11449/124122.
Full textBanca: Rosane Aparecida Gomes Battistelle
Banca: Maria Fátima do Nascimento
Resumo: O objetivo deste trabalho foi analisar as potencialidades da utilização do bagaço de cana-de-açúcar (SC) aplicado aos painéis de MDF (Medium Density Fiberboard), juntamente com fibras de madeira de reflorestamento (WR) da espécie eucalipto, na indústria moveleira e de construção civil. Neste estudo, foram produzidos painéis de MDF em quatro traços: 100% WR (T2), 33%SC+67%WR (T3), 67%SC+33%WR (T4) e 100% SC (T5). Também foram analisadas as propriedades físicas e mecânicas, segundo a norma brasileira NBR 15316-3 (2009). A densidade alvo dos painéis foi de 700 kg/m, definida como painel de média densidade. Também foi realizado o ensaio por microscopia eletrônica de varredura, (MEV) para se obter e constatar o perfil do topo ou face do painel (parte que fica em contato com os pratos da prensa), e da parte usinada ou parte interna do painel. O adesivo utilizado foi a uréia-formaldeído, na proporção de 10% da massa total do painel. Os resultados analisados indicaram que o traço com 100% SC (T5) apresentou o melhor desempenho entre os trapos, atingidos em alguns casos os valores recomendados pela NBR 15316-2 (2009). Pelos resultados averiguados o bagaço de cana-de-açúcar apresentou bom potencial para a fabricação de painéis MDF, devendo ser estudado com maior aprimoramento
Abstract: The objective of this study was to analyze the potentialities of using sugarcane bagasse (SC) applied to MDF panels (Medium Density Fiberboard), along with reflorestation wood fibers (WR) of eucalyptus species, in the industry of furniture and construction. In this study, it was produced panels of MDF in four traces: 100% WR (T2), 33% SC+67% WR (T3), 67% SC+33% WR (T4) and 100% SC (T5). Also it was analyzed its physical and mechanical properties, according to the Brazilian standard NBR 15316-3 (2009). The target density of the panels was 700 kg/m, defined as medium density fiberboard. In addition it was carried out surface analysis of the top and the internal part of the panel through Scanning Electron Microscopy (SEM). The panels were bonded with urea-formaldehyde, in the proportion of 10% by mass of the panel. The results indicated that the trace with 100% SC (T5) showed the best performance among the traces, reaching, in some cases, the values recommended by NBR 15316-2 (2009). This results shows the possibility of using sugarcane bagasse for the production of MDF panels, however it is recommended more studies to improve its physical and mechanical characteristics
Mestre
Swankie, William. "Effects of Temperature on the Emission Rate of Formaldehyde from Medium Density Fiberboard in a Controlled Chamber." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6960.
Full textHanda, Dev Roberto. "More of the same--why medium-density, low-rise housing is underrepresented in suburban Toronto housing markets." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/66727.
Full textDinhane, Fernanda Christiane Rossetto [UNESP]. "Propriedades físico-mecânicas de painéis de mdp (medium density particleboard) constituído de bambu e fibra de coco." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/136308.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A matéria-prima utilizada pelas indústrias de painéis é a madeira de reflorestamento, sendo de diversas espécies. Visando o aproveitamento dos resíduos agroindustriais e a melhora no desempenho físico-mecânico dos painéis, a utilização de outros materiais como o bagaço de cana, o sisal, a casca de café e a fibra de coco são algumas alternativas. Além destes materiais, o bambu destaca-se pela sua alta produtividade e pela menor quantidade de área plantada quando comparada com outras culturas, como o Eucalipto. Números que representam a quantidade de resíduos gerados, no caso da fibra de coco no Brasil são de aproximadamente 3,7 mil toneladas considerando que um fruto pesa dois quilogramas, no ano de 2014. O objetivo deste trabalho foi avaliar as propriedades físicas e mecânicas de painéis MDP (Medium Density Particleboard), fabricado com três camadas, constituídos de fibra de coco e partículas de bambu, com variações nas porcentagens utilizadas de fibra de coco na camada interna do painel. Para a fabricação dos painéis utilizou-se partículas retidas em peneiramento com peneiras de 9 mesh, 16 mesh, 35 mesh e 60 mesh. Através do processamento mecânico dos materiais e da adição de adesivo poliuretano bi-componente à base de óleo de mamona foram confeccionado painéis de bambu com fibra de coco. Painéis estes constituídos de duas camadas externas de bambu e a camada interna de fibra de coco mais bambu. Em termos de porcentagem de material utilizado em um painel, 60 % representa a parte interna e o restante corresponde à parte externa, 20 % acima e 20 % abaixo da camada interna. Sendo que, as variações das porcentagens de fibra de coco na camada interna foram de 0% para o Tratamento 0-100, 10% para o Tratamento 10-90, 20% para o Tratamento 20-80 e 30% para o Tratamento 30-70. Para cada tratamento foram realizados cinco repetições, totalizando 20 painéis produzidos. As normas utilizadas como referência para avaliação físico-mecânica foram NBR 14810-2 (2013), ANSI A208.1 (1999) e CS 236-66 (1968), avaliando as propriedades físicas e mecânicas. Foram determinados o teor de umidade, densidade, inchamento em espessura 24 horas, absorção de água 24 horas, resistência à flexão estática e módulo de elasticidade, resistência à tração perpendicular e arrancamento de parafuso no topo e na superfície. O tratamento 0-100 obteve os maiores valores médios de resistência. Atendeu as especificações das três normas, exceto a CS 236-66 (1968) para o MOE. Com o objetivo da utilização da fibra de coco, o tratamento 30-70 foi o tratamento que dentre os três (tratamentos 10-90, 20-80 e 30-70) obteve os maiores valores médios de resistência, viabilizando assim o uso da fibra de coco com o bambu, para a produção de móveis e de painéis de revestimento térmico acústico que necessitam de valores mínimos de resistência.
The raw material used by panels industries is reforested wood, and of several species. Targeting the use of agro-industrial waste and the improvement in physical and mechanical performance of the panels, the use of other materials such as sugarcane bagasse, sisal, coffee husk and coir are some alternatives. In addition to these materials, bamboo stands out for its high productivity and the lower amount of planted area compared to other crops such as Eucalyptus. Numbers representing the amount of waste generated in the case of coconut fiber in Brazil are approximately 3.7 thousand tons whereas a fruit weighs two kilograms, in the year 2014. The objective of this study was to evaluate the physical and mechanical properties MDP panels (Medium Density Particleboard) made of three layers consisting of coconut and bamboo fiber particles with variations in the percentages of coconut fiber used in the inner layer panel. For the manufacture of the panels used to particulates collected in sieve with mesh sieve 9, 16 mesh, 35 mesh and 60 mesh. Through the mechanical processing of the materials and the addition of two-component polyurethane adhesive on castor oil-based panels were made with bamboo coconut fiber. These panels consisting of two outer layers of bamboo and the inner layer coconut more bamboo fiber. In terms of percentage of material used in a panel, 60% is inside, and the rest is to the outside, 20% above and 20% below the inner layer. Since the variations of the percentages of coconut fiber in the inner layer was 0% for the Treatment 0-100, 10% for the Treatment 10-90 20% 20-80 for the treatment and 30% for the Treatment 30- 70. For each treatment were performed five repetitions, totaling 20 panels produced. The standards used as reference to physical and mechanical evaluation were NBR 14810-2 (2013), ANSI A208.1 (1999) and CS 236-66 (1968), evaluating the physical and mechanical properties. They were determined moisture content, density, thickness swelling 24 hours, water absorption 24 hours, static bending strength and modulus of elasticity, internal bond and screw pullout top and bottom surface. Treatment 0-100 obtained the highest average values of resistance. Met the specifications of the three standards, except CS 236-66 (1968) to the MOE. With the goal of using coir, treatment 30-70 was the treatment of the three (treatments 10-90, 20-80 and 30-70) had the highest average values of resistance, thus enabling the use of fiber coconut with bamboo, for the production of furniture and sound insulated panels requiring minimum resistance values.
Dinhane, Fernanda Christiane Rossetto. "Propriedades físico-mecânicas de painéis de mdp (medium density particleboard) constituído de bambu e fibra de coco /." Bauru, 2016. http://hdl.handle.net/11449/136308.
Full textCo-orientador: Cristiane Inácio de Campos
Banca: Rosane Aparecida G. Battsitelle
Banca: Maria Fátima do Nascimento
Resumo: A matéria-prima utilizada pelas indústrias de painéis é a madeira de reflorestamento, sendo de diversas espécies. Visando o aproveitamento dos resíduos agroindustriais e a melhora no desempenho físico-mecânico dos painéis, a utilização de outros materiais como o bagaço de cana, o sisal, a casca de café e a fibra de coco são algumas alternativas. Além destes materiais, o bambu destaca-se pela sua alta produtividade e pela menor quantidade de área plantada quando comparada com outras culturas, como o Eucalipto. Números que representam a quantidade de resíduos gerados, no caso da fibra de coco no Brasil são de aproximadamente 3,7 mil toneladas considerando que um fruto pesa dois quilogramas, no ano de 2014. O objetivo deste trabalho foi avaliar as propriedades físicas e mecânicas de painéis MDP (Medium Density Particleboard), fabricado com três camadas, constituídos de fibra de coco e partículas de bambu, com variações nas porcentagens utilizadas de fibra de coco na camada interna do painel. Para a fabricação dos painéis utilizou-se partículas retidas em peneiramento com peneiras de 9 mesh, 16 mesh, 35 mesh e 60 mesh. Através do processamento mecânico dos materiais e da adição de adesivo poliuretano bi-componente à base de óleo de mamona foram confeccionado painéis de bambu com fibra de coco. Painéis estes constituídos de duas camadas externas de bambu e a camada interna de fibra de coco mais bambu. Em termos de porcentagem de material utilizado em um painel, 60 % representa a p... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The raw material used by panels industries is reforested wood, and of several species. Targeting the use of agro-industrial waste and the improvement in physical and mechanical performance of the panels, the use of other materials such as sugarcane bagasse, sisal, coffee husk and coir are some alternatives. In addition to these materials, bamboo stands out for its high productivity and the lower amount of planted area compared to other crops such as Eucalyptus. Numbers representing the amount of waste generated in the case of coconut fiber in Brazil are approximately 3.7 thousand tons whereas a fruit weighs two kilograms, in the year 2014. The objective of this study was to evaluate the physical and mechanical properties MDP panels (Medium Density Particleboard) made of three layers consisting of coconut and bamboo fiber particles with variations in the percentages of coconut fiber used in the inner layer panel. For the manufacture of the panels used to particulates collected in sieve with mesh sieve 9, 16 mesh, 35 mesh and 60 mesh. Through the mechanical processing of the materials and the addition of two-component polyurethane adhesive on castor oil-based panels were made with bamboo coconut fiber. These panels consisting of two outer layers of bamboo and the inner layer coconut more bamboo fiber. In terms of percentage of material used in a panel, 60% is inside, and the rest is to the outside, 20% above and 20% below the inner layer. Since the variations of the percentages... (Complete abstract click electronic access below)
Mestre
Abdu-Aguye, Umar-Faruk. "On lowering the error floor of short-to-medium block length irregular low density parity check codes." Thesis, University of Plymouth, 2018. http://hdl.handle.net/10026.1/11156.
Full textHilger, Thomas. "Medium Modifications of Mesons." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-94078.
Full textThe interplay of hadron properties and their modification in an ambient nuclear medium on the one hand and spontaneous chiral symmetry breaking and its restoration on the other hand is investigated. QCD sum rules for D and B mesons embedded in cold nuclear matter are evaluated. We quantify the mass splitting of D - D-bar and B - B-bar mesons as a function of the nuclear matter density and investigate the impact of various condensates in linear density approximation. The analysis also includes D_s and $D^*_0 mesons. QCD sum rules for chiral partners in the open-charm meson sector are presented at nonzero baryon net density or temperature. We focus on the differences between pseudo-scalar and scalar as well as vector and axial-vector D mesons and derive the corresponding Weinberg type sum rules. Based on QCD sum rules we explore the consequences of a scenario for the rho meson, where the chiral symmetry breaking condensates are set to zero whereas the chirally symmetric condensates remain at their vacuum values. The complementarity of mass shift and broadening is discussed. An alternative approach which utilizes coupled Dyson-Schwinger and Bethe-Salpter equations for quark-antiquark bound states is investigated. For this purpose we analyze the analytic structure of the quark propagators in the complex plane numerically and test the possibility to widen the applicability of the method to the sector of heavy-light mesons in the scalar and pseudo-scalar channels, such as the D mesons, by varying the momentum partitioning parameter. The solutions of the Dyson-Schwinger equation in the Wigner-Weyl phase of chiral symmetry at nonzero bare quark masses are used to investigate a scenario with explicit but without dynamical chiral symmetry breaking
Tasooji, Mohammad. "Effects of Thermomechanical Refining on Douglas fir Wood." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/96218.
Full textPHD
Karol, Elizabeth. "Energy efficient design in housing of small floor area : appropriateness in housing for the aged." Curtin University of Technology, Faculty of Built Environment, Art and Design, 2003. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=14106.
Full textThe methods used to examine the notion of appropriateness commenced with a literature review that related to the general physical and economic status of older people and their needs and responses to space heating and cooling in the home. Further, the literature review considered the principles of energy efficient design and benchmark criteria for energy efficiency. Arising from the literature review, two tools of study were used in order to develop a set of data encapsulating the salient features of small, medium density housing. The first was a multiple case study of typical housing for the aged. This was conceived as a way of determining if small, medium density dwellings could provide appropriate indoor thermal conditions and/or were designed to be energy efficient. The indoor temperatures were monitored in summer and winter and annual energy consumption was established and statistically analysed. The building designs were analysed in terms of their orientation, glazing areas, wall areas, volumes of thermal mass and ventilation capacity and compared with benchmarks for energy efficient design. The second tool involved a series of computer simulations of a typical small, medium density dwelling. The simulation process was utilised to determine if a new set of benchmarks for energy efficient small, medium density dwellings were required that would incorporate the notion of appropriateness. From the multiple case study it was found that, irrespective of design, indoor temperatures in 98% of dwellings were above the acceptable maximum summer temperature of 27.4°C in still air and indoor temperatures in all dwellings were found to be below the acceptable minimum daytime temperature of 19.8°C.
The findings also showed that some aspects of the benchmarks for energy efficient design were not appropriate in typical, medium density housing constructed specifically for the aged. From the simulation process it was discovered that acceptable temperatures could be achieved in small medium density housing if the principles of energy efficient design, incorporated within a new set of benchmarks, were integrated with appropriateness criteria for housing for the aged. The approach taken with the new benchmarks was to create both performance based and prescriptive design solutions. The performance model differs from the current benchmarks for energy efficient design in that it establishes key functional objectives for energy efficient design. Compared to the current benchmarks, the prescriptive design solutions show significant reductions in the areas of northerly glazing and total glazing. To compensate for the reduced area of northerly glazing, both direct and indirect means of solar gain are utilised for passive heating. The thesis outcomes have implications for three areas of the construction industry. The prescriptive design solutions presented in building regulations for energy efficiency in housing need to be qualified, the design briefs prepared for energy efficient construction of small, medium density housing need amendment and the approach taken by designers involved in energy efficient small, medium density housing needs to be reconsidered.
Wheeler, Tom. "An analysis of the effectiveness of mains water reduction strategies in a medium density residential development in metropolitan Perth." Thesis, Wheeler, Tom (2019) An analysis of the effectiveness of mains water reduction strategies in a medium density residential development in metropolitan Perth. Honours thesis, Murdoch University, 2019. https://researchrepository.murdoch.edu.au/id/eprint/54832/.
Full textLi, Junqiu. "Physical and Mechanical Properties of Medite® MDF Exterior from Acetylated Wood Fibers." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-76444.
Full textDavid, Noemi. "Asymptotic analysis for a model of tumor growth: from a cell density model to a Hele-Shaw problem." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/17066/.
Full textColyn, Robin. "Optimising camera trap density and position to determine medium and large mammal species richness and occupancy on the Cape Peninsula, South Africa." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2433.
Full textLargely due to anthropogenic causes, biodiversity and particularly species diversity is changing at an extraordinary rate, with declines in species abundance, community composition and extinction risk being of crucial concern. Monitoring of state variables of biodiversity such as species richness and occupancy are of significant importance in determining the severity of threats placed on species, populations and communities. As a non-invasive monitoring method camera traps are noted as being an effective, accurate and rapid means of compiling species richness estimates of medium to large terrestrial mammals. However, crucial elements of camera trap survey design are rarely empirically addressed, which has questioned the need for a standardised camera trapping protocol. Table Mountain National Park (TMNP) is a protected area that is under serious anthropogenic pressure through urban and peri-urban development. Although it is the last refuge for a number of large mammal species on the Cape Peninsula, current mammalian species richness knowledge within the TMNP are limited. Accurate and current species richness estimates are therefore needed within TMNP and more specifically the Cape of Good Hope (CoGH), which exclusively hosts a number of medium and large mammal species. The aims of this study were to optimise a camera survey protocol for the Peninsula region, with a focus on camera density, placement and survey duration that will enable accurate estimations of medium to large mammal species richness and occupancy.
Pal, Maninder. "Leak detection and location in polyethylene pipes." Thesis, Loughborough University, 2008. https://dspace.lboro.ac.uk/2134/15181.
Full textAwe, Temitope Abidemi. "The prospect of providing low-income medium density housing in developing countries : problems and opportunities with special reference to Cape Town, South Africa." Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/5603.
Full textIt is thus proposed in this thesis that low-income medium-density developments, located appropriately in inner city areas to kick-start settlements that are integrated, compact and promote mixed land uses, as well as aspiring towards sustainable urban development, are needed in the cities of developing countries. A typical example of such a housing development is Springfield Terrace Woodstock, Cape Town. This pilot project, demonstrating how the provision oflow-income medium-density housing (in the fonn of three- to four-storey walk-up blocks of flats) can be provided in central Cape Town and how these benefit from the existing bulk infrastructure. It further demonstrates how this housing type could be located and utilised to encourage a shift away from low-density to medium-density housing, particularly with regard to lowincome earners.
Gupta, Arun. "Modelling and Optimisation of MDF Hot Pressing." Thesis, University of Canterbury. Chemical and Process Engineering, 2007. http://hdl.handle.net/10092/4200.
Full textLilley, Susan Jane. "Digging the dirt on density : a study of medium density housing in Christchurch's Living Three zone : a thesis submitted in partial fulfillment of the requirements for the degree of Master of Arts in Geography at the University of Canterbury /." Thesis, University of Canterbury. Geography, 2006. http://hdl.handle.net/10092/1283.
Full textGatchell, Michael. "Molecular Hole Punching : Impulse Driven Reactions in Molecules and Molecular Clusters." Doctoral thesis, Stockholms universitet, Fysikum, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-129523.
Full textAt the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 1: Submitted.