• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1370
  • 572
  • 174
  • 151
  • 45
  • 28
  • 21
  • 17
  • 16
  • 14
  • 14
  • 14
  • 14
  • 14
  • 14
  • Tagged with
  • 2843
  • 445
  • 287
  • 278
  • 275
  • 268
  • 258
  • 256
  • 251
  • 204
  • 168
  • 158
  • 153
  • 142
  • 139
  • 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.
731

Effects of walking speed on center of mass motion in healthy young and elderly adults

Hastie, Marisa L., January 2003 (has links)
Thesis (M.S.)--University of Oregon, 2003. / Includes bibliographical references (leaves 39-42).
732

Correlation between muscular strength and dynamic stability in the elderly

Lee, Heng-Ju, January 2003 (has links)
Thesis (M.S.)--University of Oregon, 2003. / Includes bibliographical references (leaves 75-81).
733

The influence of dynamic visual environments, stationary references, work experience, and age on postural control

Torgerud, Steven R. January 2004 (has links)
Thesis (M.S.)--Purdue University, 2004. / Includes bibliographical references.
734

An intensive massed practice approach to re-training balance post-stroke

Adomaitis, Laura G., January 2002 (has links)
Thesis (Ph. D.)--University of Oregon, 2002. / Includes bibliographical references (leaves 178-188).
735

The interactions of stance width and feedback control gain a modeling study of bipedal postural control /

Scrivens, Jevin Eugene. January 2007 (has links)
Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2008. / Wayne J. Book, Committee Member ; Young-Hui Chang, Committee Member ; T. Richard Nichols, Committee Member ; Lena H. Ting, Committee Co-Chair ; Stephen P. DeWeerth, Committee Co-Chair.
736

Effects of physically and visually defined gravity on perception and eye movements /

Barnett-Cowan, Michael. January 2005 (has links)
Thesis (M.A.)--York University, 2005. Graduate Programme in Psychology. / Typescript. Includes bibliographical references (leaves 128-133). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url%5Fver=Z39.88-2004&res%5Fdat=xri:pqdiss &rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR11747
737

A study of the relationship between golf performance and depth perception, arm/hand steadiness, grip strength and dynamic balance /

Ruot, Charles W. January 1987 (has links) (PDF)
Thesis (M.S.)--Eastern Illinois University, 1987. / Includes bibliographical references (leaves 31-32).
738

Improving muscular strength and balance in an older active population /

Campbell, Jon Bradley. January 1994 (has links) (PDF)
Thesis (M.S.)--Eastern Illinois University, 1994. / Includes bibliographical references (leaves 39-41).
739

Dynamic balance and basketball playing ability /

Hobbs, Michael L. January 1900 (has links)
Thesis (M.Ed.)--Texas State University--San Marcos, 2008. / Vita. Appendix: leaves 48-56. Includes bibliographical references (leaves 57-65). Also available on microfilm.
740

Avaliação dos efeitos da utilização da combustão enriquecida com oxigênio em turbinas a gás industriais de um eixo

Maidana, Cristiano Frandalozo January 2011 (has links)
Muitas áreas da indústria utilizam substanciais somas de energia térmica, geralmente obtida pela combustão de óleo, gás ou carvão. Na queima destes combustíveis geralmente é utilizado ar como oxidante, que é constituído aproximadamente por 21% de O2 e 79% de N2, em volume. Em muitos casos, os processos de combustão podem ser enriquecidos com o uso de oxidantes que possuem concentrações de oxigênio maior que a existente no ar. Isto é conhecido como combustão enriquecida com oxigênio (OEC) que pode trazer vários benefícios como a redução do consumo de combustíveis, aumento da energia térmica disponível, redução no volume dos gases de combustão, baixo custo de adaptação dos equipamentos existentes, entre outros. Com este cenário, o presente trabalho investiga o uso da combustão enriquecida com oxigênio em uma turbina a gás industriais de um eixo. O equipamento foi modelado termodinamicamente e com a consideração que os gases de combustão formados se encontram em equilíbrio químico. Dessa forma, são estudadas três formas de operação da turbina a gás com o uso do processo de enriquecimento da combustão, que são: 1) vazão de ar de admissão constante, 2) potência líquida constante com rotação fixa e 3) potência líquida constante com rotação variável. Os resultados mostram que pode ser obtido um aumento de até 143% na potência líquida e de 24% no rendimento térmico do ciclo para o caso 1. Entretanto, é necessária uma substancial soma de oxigênio para sustentar o processo. / Many industry areas use large amounts of thermal energy, usually obtained by burning oil, gas or coal. The combustion of these fuels generally used air as an oxidant, which consists of approximately 21% O2 and 79% N2, in volume. In many cases, combustion processes can be enriched with the use of oxidants with higher concentration of oxygen than present in the air. This is known as oxygen-enhanced combustion (OEC), which can provide several benefits such as reduced fuel consumption, increased thermal energy availability, reduction in flue gas volume, low retrofitting cost and others. With this background, this work investigates the use of oxygen-enhanced combustion in heavy duty single-shaft gas turbine. The equipment was thermodynamically modeled and the consideration that the combustion gases are in chemical equilibrium. Thus, three possible ways of implementation of the enrichment process of combustion were studied, which are: 1) constant intake air flow, 2) constant net power with fixed rotation and 3) constant net power with variable speed. The results showed that one can be obtained up to 143% increase in net power and 24% in thermal efficiency of the cycle in case 1. However, it’s necessary a substantial amount of oxygen to sustain the OEC process.

Page generated in 0.0552 seconds