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Thesis (M.S.)--West Virginia University, 2002. / Title from document title page. Document formatted into pages; contains x, 103 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 103).

Thesis (M.S.)--Brigham Young University. Dept. of Physics and Astronomy, 2004. / Includes bibliographical references (p. 70-72).

Thesis (M.S.)--West Virginia University, 2000. / Title from document title page. Document formatted into pages; contains xi, 86 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 85-86).

Thesis (Ph.D.) - University of Queensland, 2003. / Includes bibliographical references.

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Digitized by Kansas Correctional Industries

Thesis (M.S.)--West Virginia University, 1998. / Title from document title page. Document formatted into pages; contains ix, 127 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 91-92).

Orientador: Carlos Eduardo Angeli Furlani / Coorientador: Afonso Lopes / Banca: Marcelo Boamorte Ravelli / Banca: Carlos Alessandro Chioderoli / Resumo: Os fatores que mais influenciam no rendimento de tração são ascondições do solo, as dimensões dos pneus, sua relação peso/potência e o tipo deconstrução do pneu (radial/diagonal). O uso de pneus específicos para determinadotipo de superfície de rolamento permite aumentar seu desempenho operacional. Logo,o detalhamento dos pneus, uso da carga necessária sobre o rodado, associados aosestudos da compactação do solo, pode indicar melhores condições de trabalho econsequentemente redução do consumo de combustível. Assim, objetivou-se avaliara resistência mecânica à penetração do solo, recalque dos pneus e o consumo decombustível horário após o tráfego de dois tipos de pneus radiais traseiros (710/70R38e 650/85R38) e dianteiros (600/70R28 e 600/65R28) combinados com quatro relaçõespeso/potência do trator em área preparada para a cultura da cana-de-açúcar. Odelineamento estatístico foi fatorial com parcelas subdivididas em blocos casualizadocom quatro repetições, foi feita análise estatística pelo teste F e quando significativofoi realizado o teste Tukey a 5% probabilidade, para as interações entre tratamentosajuste de regressão de maior expoente que apresentasse significância e mapas deisolinhas para melhor explicar o comportamento da variável. Os pneus e as relaçõespeso/potência não interferiram na resistência mecânica do solo à penetração nopresente trabalho. A compactação do solo aumenta conforme o aumento do númerode passadas oferecendo maior ... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The factors that most influence the yield of traction are soil conditions, tire size, weight / power relationship, and tire type (radial / diagonal). The use of specific tires for a certain type of rolling surface would increase their operational performance. Therefore, the characterization of the tire, use of the required load on the wheel associated with soil compaction studies, may indicate better working conditions and consequently reduced fuel consumption. The objective of this study was to evaluate the mechanical resistance to soil penetration, the area mobilized by the tires and the fuel consumption after traffic of two types of rear (710 / 70R38 and 650 / 85R38) and front (600 / 70R28 and 600 / 65R28) combined with four tractor weight / power relationship in an area prepared for sugarcane cultivation. The statistical design was a factorial with randomized blocks subdivided with four replicates, statistical analysis was performed by the F test and when significant the Tukey test was performed at 5% probability, for the interactions between treatments regression adjustment of higher exponent that presented significance and Maps to better explain the behavior of the variable. Tires and weight / power relationship did not interfere in the mechanical resistance of the soil to penetration in the present work. Soil compaction increases as the number of passes increases, giving the soil greater mechanical resistance to penetration, negatively interfering with layer 10 to 20 c... (Complete abstract click electronic access below) / Mestre

This thesis is written with the intention to help establish the fact that there are definite advantages to be claimed from the use of statistical quality control in the foundry industry. / Master of Science