Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Tricycle"”.
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Réduction de la traînée aérodynamique d’un tricycle de type roadster
Le travail de réduction de la traînée aérodynamique d’un véhicule peut être mené sur deux fronts à la fois; d’une part la simulation numérique CFD (Computational Fluid Dynamics) et d’autre part les tests expérimentaux. Les méthodes et approches appliquées à la réduction de la traînée aérodynamique …
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The design of a hand-powered lever-driven tricycle for the handicapped
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1993.
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Design of a tricycle chassis using computer-aided design and finite element analysis
… to improve the rear chassis of a pedal-powered tricycle. The tricycle, which is used in Lagos, Nigeria to collect and transport waste materials, is regularly ridden on rough terrain with loads greater than 600 pounds, and thus requires a frame that can be subjected to large loads without …
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The directional stability and control of an airplane during the landing roll
… instability, as exhibited by aircraft with tricycle landing gear, during the landing roll after touchdown. The approximate equations of motion are solved on an analog computer to describe the motion of an aircraft as it moves along the runway after it has landed. It is shown that during the …
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Étude de la réaction de Diels-Alder transannulaire d'un triène macrocyclique à treize membres : Application à un modèle conduisant aux tricycles A.B.C [6.6.5] des alcaloïdes de la famille Veratrum
… modifications des groupes fonctionnels sur le tricycle sont aussi présentées
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Progrès vers la synthèse de la momilactone A
… vue de l'obtention du triène macrocyclique et du tricycle par réaction de Diels-Alder transannulaire effectuée sur ce macrocycle sont décrits. L'étape clé de cette route synthétique est une condensation aldolique d'un imide chiral possédant un vinylsilane.
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Synthèse totale de la (±)-Momilactone A
… En premier lieu, la synthèse convergente d'un tricycle ayant une stéréochimie en jonction de cycles trans-syn-trans par la réaction de Diels-Aider transannulaire sera décrite. Deuxièmement, deux études modèles impliquant l'élaboration des substituants sur les cycles A et C du squelette …
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Approaches to functional electrical stimulation induced cycling and application for the child with a spinal cord injury
… FES system. Through both simulation and tricycle-based experiments, all three approaches have been shown to provide practical stimulation activation timing. The second research focus concerns the development of two FES-cycling systems which are suitable for a spinal cord injured child, …
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Control strategies for functional electrical stimulation induced cycling
… to paraplegic cyclists. A modified recumbent tricycle is instrumentated with an electric motor and sensors to measure cadence and the power produced by the cyclist at the crank. They are then integrated to a stimulator and a laptop computer. The tricycle is mounted on an indoor cycling trainer …
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The stability of an aircraft during the landing roll
… is to determine the directional stability of a tricycle-geared aircraft during the landing roll. The motion of the aircraft is simulated by a computer program based on the appropriate equations of motion. Empirical aircraft and tire data are utilized in order to improve the simulation process. …
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Dynamics-based control of a mobile robot with non-holonomic constraints.
… dimensional environment with random obstacles, a tricycle configuration mobile robot has been built and used to verify the performance of dynamics based control on a flat surface. This controller works by taking into consideration the forces involved in moving the vehicle and therefore can produce …
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Design and development of an affordable autonomous vehicle for bike lanes
… Vehicle (PEV), a low-cost autonomous electric tricycle specifically designed for operation in bike lanes in urban environments. We adopt a ground-up approach towards building an autonomous vehicle which operates in less hostile traffic conditions as compared to car lanes. The vehicle uses …
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Total synthesis of Class II and Class III Galbulimima Alkaloids
… Alder reaction in the rapid synthesis of the tricycle ABC-ring system in enantiomerically enriched form, the use of a formal [3+3] annulation strategy to secure the CDE-ring system with complete diastereoselection, and successful implementation of our biogenetically inspired oxidative …
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Design and prototyping of a retrofittable motorized module for hand powered tricycles for Developing countries
… motorized module for a hand-powered tricycle produced and widely distributed throughout Kenya. There are many mobility aids that are similar to the Kenyan handcycle, which can also adapt the module design. By using this innovative module, users will be able to increase their range of …
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Synthesis and determination of the absolute configuration of Armatol A through a polyepoxide cyclization cascade : revision of the proposed structures of Armatols A-F
… of Armatol A The synthesis of the fused 6,7,7-tricycle of armatol A was investigated. Fragments containing both a ketone and an aldehyde for subsequent fragment coupling were generated via a triepoxide cascade. Elimination of the secondary alcohol in the oxepane ring proved challenging; …
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Embedding information technology into the further education vocational education and training curriculum
… training courses. These models included: " the Tricycle model which identifies three groups of people who may influence, positively or negatively the change strategy " the Factors Affecting the Introduction of Information Technology (FAIIT) model that outlines the factors, agencies, …
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Intramolecular carbenoid insertion : reactions of [alpha] -diazoketones derived from benzothienyl, pyrolyl and indolyl alkanoic acids with rhodium (II) acetate
… 2-ylmethyl)-2(5H)-furanone (166) along with the tricycle 159. The chemistry of the pyrrolyl and the indolyl moieties linked to terminal adiazoketone systems was also investigated. The decomposition of I-diazo-(2-pyrrolyl)-2propanone (173) results in the formation of two products; the N-H …
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Total synthesis of 19,20-epoxydocosapentaenoic acid-ethanolamide (19,20-EDP-EA) and strategies towards the total synthesis of malabaricane triterpenoids
… approach featuring a one-step construction of tricycle from epoxyhomofarnesyl nitrile. Specifically, we were able to confirm our hypothesis that the chirality transfer feature of the Au(I)-catalyzed Rautenstrauch rearrangement as utilized in the syntheses of isomalabaricanes rhabdastrellic acid …
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Design and Performance of a Highly Mobile, Climbing, Wheeled, Soft-bodied Robot
… integration of wheeled and soft robotics. The tricycle-style vehicle uses magnetic wheels to adhere to surfaces and a soft, silicone body to introduce continuous, three degree-of-freedom mobility into the vehicle body. Individual components were optimized using theoretical and experimental …
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Organokatalytische Synthesen biologisch aktiver Naturstoffe : Totalsynthesen von Amaminol A und B und (+)-Mitsugashiwalacton sowie Synthesen 2,6-disubstituierter Tetrahydropyranen
… reaction also generated a new and interesting tricycle as a by-product, which occurs as a complex fragment in biologically active natural compounds. The preliminarily investigated selective nitroaldol reactions to generate the precursors of amaminol warrant further studies. In order to complete …