Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaves 122-123). Also available via the Internet.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1991. / Vita. Abstract. Includes bibliographical references (leaves 91-93). Also available via the Internet.

Thèse (M.A.)--Université Laval, 2004. / Bibliogr.: f. 105-109. Publié aussi en version électronique.

Thesis (Ph. D.)--University of Missouri-Columbia, 1999. / Typescript. Vita. Includes bibliographical references (leaves 97-101). Also available on the Internet.

Made available in DSpace on 2014-06-11T19:28:34Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-08-11Bitstream added on 2014-06-13T20:37:39Z : No. of bitstreams: 1 resende_fls_me_guara.pdf: 781042 bytes, checksum: 90a752d449437b2098cb5b1a50b2cae7 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O objetivo deste trabalho foi estudar a distribuição das cargas no sistema cadeira plataforma de força (C-PF) e verificar se há correlação entre as forças medidas no assento e encosto, na postura sentada adequada. Participaram 38 voluntários, classificados pelo biótipo (32 mulheres e 6 homens): idade média de 43,92 anos, estatura média de 1,60 m e peso corporal médio de 65,10 kgf. Uma cadeira, com células de carga nas partes anterior e posterior do assento e no encosto, e uma plataforma de força mediram a distribuição do peso corporal. Estabeleceram-se várias correlações entre as variáveis (peso corporal, altura, idade, e índice de massa corporal) e as cargas medidas e entre as próprias forças adquiridas. Uma das correlações determinou uma relação entre a força total no assento e a força medida no encosto. A distribuição do peso corporal observada foi: 20,04% na plataforma de força; 45,33% e 30,43%, nas partes anterior e posterior do assento, respectivamente; e 4,20% no encosto. Não houve diferenças estatísticas significativas na comparação das médias dos valores da distribuição do peso corporal tanto entre os sexos como entre os biótipos. Porém, como há diferenças na forma corporal de acordo com os sexos e com os biótipos, houve certa diferença nos valores das forças medidas, no sistema C-PF. / The aim of this study was to study the load distribution in chair-force plate system (CFP) and to verify if there is correlation between measured seat and backrest forces in the adequate sitting posture. 38 volunteers participated of the study, classifieds according to physical types (32 female and 6 male): mean age of 43,92 years old, mean height of 1,60 m and mean body weight of 65,10 kgf. An instrumented office chair with load cells in the anterior and posterior portions of the seat and backrest and a force plate were used to measure the forces and body weight distribution in C-FP system. This study was established many correlations among some variables (body weight, height, age and body mass index) and the measured loads and among the acquired forces. One of these correlations determined a relation among total force measured on seat and acquired force on lumbar backrest. The body weight distribution observed in the C-FP system was: 20,04% in the force plate, 45,33% and 30,43% in the anterior and posterior portions of the seat respectively, and 4,20% in the backrest. There were no statistics significant differences in comparison of values weight distribution averages as between gender as between physical patterns. But, there are some differences in the body shape according to gender and physical patterns, it there was some difference in the values of acquired forces in the C-FP system.

A thin-film gage was designed, constructed, and tested for the measurement of skin friction in steady and non-steady flows. This direct-force-reading gage is designed to have a high frequency response (> 1 kHz), high temperature capability (800 K), and full directional sensitivity in both subsonic and supersonic flows. The thin-film gage consists of a floating element attached to the wall surface by four tabs. The floating element consists of a thin metal film mounted flush to the wall surface. Shear forces acting on the thin-film surface cause strain concentrations to develop in the attachment tabs where strain sensors are located. The shear forces are related to the differential output of the strain sensors located on each of the orthogonal axes of the thin-film gage. A large-scale (10X) prototype was constructed and statically calibrated for actual shear stress measurements. Subsonic, steady flow tests demonstrated the directional sensitivity capability and gave reasonable shear measurements compared to Preston tube results. Subsonic, non-steady flow tests demonstrated the high frequency response of the thin-film gage. Supersonic flow testing was performed which identified design flaws in the original design which were corrected in the development of an actual-size (1X) prototype. Survival of the thin-film gage in a supersonic environment was demonstrated with the 1X prototype. Finally, the 1X prototype was statically calibrated for measurements of shear stress in a supersonic environment. / Master of Science

Doct. diss.--Irvine (Calif.)--University of California, 1987.

Texte remanié de: Th. doct.--Études ibériques--Bordeaux 3, 1998. / Bibliogr. p. 359-369. Glossaire. Index.

Made available in DSpace on 2014-10-09T12:30:35Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:01:00Z (GMT). No. of bitstreams: 1 01112.pdf: 4081809 bytes, checksum: 8bc8c990027f72b27ae11db41cc3b5b6 (MD5) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

Made available in DSpace on 2014-10-09T12:30:35Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:01:00Z (GMT). No. of bitstreams: 1 01112.pdf: 4081809 bytes, checksum: 8bc8c990027f72b27ae11db41cc3b5b6 (MD5) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP