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A Novel System for the Measurement of Dynamic Loading on a Bicycle FrameConsell, Ryan January 2013 (has links)
The design of bicycle frames has remained fairly static for the majority of the past century, but recent increases in demand for high performance bicycles has created an accelerated design cycle that requires innovation. In order to design new frames with confidence in their capacity to withstand the rigors of use, reliable data about the nature of that use is needed, but this data is not currently available. The purpose of this research was to develop and implement a system that is capable of interpolating loads applied to a bicycle frame during vigorous riding for the purpose of improving the quality of information available to bicycle designers.
The system that was developed employed finite element modeling to locate strain gauges on a frame and a least-squares approximate solution of strain readings to interpolate the applied loads. At its best, the system is capable of resolving loads with better than a 2% error. This system is limited, though, as it can only be applied in cases where the frame has a significant strain reaction to a load case but does not have a significant change in geometry during loading. This system was implemented on a cross-country mountain bicycle frame for the purposes of determining a rider weight to load relationship and to compare the standardized test procedures for bicycles to the loads experienced in the field.
It was confirmed that there is a linear relationship between rider weight and load on the frame for all component forces except that applied to the bottom bracket, out of plane with the bicycle frame. It was also found that the British Standards fatigue testing practices, which are used internationally to assess bicycle safety, are inconsistent in their representation of realistic riding conditions when compared with the results from the field tests. Some loads appear conservative, some offer a very large factor of safety, and two are not represented at all. In particular, the moment about the bottom bracket due to pedaling and the load on the seat from the rider appear to consistently exceed the standardized test requirements while the moment caused by fork splay seems much smaller than the tests demand.
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Valuation of recreation resources : a methodological comparison as applied to Steens Mountain, OregonWhite, William Barnes 13 November 1981 (has links)
Graduation date: 1982
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Resorting to aesthetics measuring the visual qualities of selected new urbanist-style resort developments in the Lake Tahoe region /Gower, Peter W. January 2007 (has links)
Thesis (M.S.)--University of Nevada, Reno, 2007. / "December, 2007." Includes bibliographical references (leaves 115-118). Online version available on the World Wide Web.
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Reconnaissance botany of alpine ecosystems on Prince of Wales Island, Southeast Alaska /Jaques, Dennis Randall. January 1973 (has links)
Thesis (M.S.)--Oregon State University, 1973. / Includes bibliographical references (leaves 111-124). Also available on the World Wide Web.
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The effect of irrigation frequency on growth and physiology of native landscape shrub speciesWilkin, Matthew Fudge, January 2007 (has links) (PDF)
Thesis(M.S.)--Auburn University, 2007. / Abstract. Vita. Includes bibliographic references.
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Spatial modelling of mountainous basins : an integrated analysis of the hydrological cycle, climate change and agriculture /Immerzeel, Walter. January 2008 (has links)
Univ., Diss.--Utrecht, 2008.
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Multi-partner mutualisms interactions among the mountain pine beetle and two ophiostomatoid fungal associates /Bleiker, Katherine Patricia. January 2007 (has links)
Thesis (Ph. D.)--University of Montana, 2007. / Title from title screen. Description based on contents viewed Aug. 12, 2008. Includes bibliographical references.
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Assimilation of snow covered area into a hydrologic model : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Geography in the University of Canterbury /Hreinsson, Einar Örn. January 2008 (has links)
Thesis (M. Sc.)--University of Canterbury, 2008. / Typescript (photocopy). Includes bibliographical references (leaves 45-52). Also available via the World Wide Web.
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Untersuchungen über die blattanatomie von alpen- und ebenenpflanzen. ...Lohr, Paul Louis, January 1919 (has links)
Inaug.-diss.--Basel. / Vita. "Separatabdruck von dem "Recueil des travaux botaniques neérlandais", volume XVI, livraison I, 1919." "Literatur-verzeichnia": p. [58]-59.
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Modeling of orographic precipitation with multilevel coupling of land-atmosphere interactions /Barros, Ana Paula, January 1993 (has links)
Thesis (Ph. D.)--University of Washington, 1993. / Vita. Includes bibliographical references (leaves [184]-201).
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