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 376 for “"Foil"”.
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Thermal conductivity of aluminium foil
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of General Science, 1931.
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Neutron flux perturbation by foil detectors
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1961.
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Laser foil printing and surface polishing processes
"A foil-based additive manufacturing technology for fabricating metal parts, called Laser Foil Printing (LFP), was proposed and developed in this dissertation. The manufacturing sub-processes comprising the LFP technology were comprehensively studied, which include the laser spot welding of foil, …
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Global vorticity shedding for a vanishing foil
… we approximate the disappearance of a towed foil by rapidly retracting the foil in the span-wise direction. Global vorticity shedding is in distinct contrast with conventional shedding, in which vorticity is shed from a body from only a few separation points into the fluid. In this work, we …
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The optimization of a dual foil flapping device
… to underwater propulsion would be great. A dual foil pitching-plunging device is used to replicate the basic swimming motion of a dolphin. Numerical simulations are used to predict the behavior of a single foil configuration and its wake. The numerical results are used to predict the behavior of …
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High-accuracy foil optics for X-ray astronomy
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2001.
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Propulsion through wake synchronization using a flapping foil
… wake for both fish and mechanical flapping foils. Rainbow trout (Oncorhynchus mykiss) swimming within a flow channel voluntarily positioned themselves 4D downstream from a 2" D-section cylinder, and synchronized with the cylinder wake in both frequency and phase. The phase of the trout's …
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Design and performance evaluation of a biomimetic flapping foil
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2001.
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X-ray telescope foil optics : assembly, metrology, and constraint
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2003.
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Ultrasonic Sealing of Aluminum Foil Based Laminate Food Packaging Materials
The feasibility of sealing three-layer aluminum foil-based flexible laminates using ultrasound technology was studied. The experimental results of seal evaluation provide sufficient evidence that ultrasonic sealing of MRE (Meals Ready to Eat) foil laminate package is technically feasible.High …
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Boundary element simulation of oscillating foil with leading-edge separation
… boundary element simulation of the oscillating foil with potential flow assumption. Similar to the trailing-edge separation, the leading-edge separation is modeled by a thin shear layer. Because the leading edge is rounded which is different from the sharp trailing edge, the location for …
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Flapping foil propulsion for cruising and hovering autonomous underwater vehicles
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2003.
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Bending Of Metallic Thin Foil Via High Energy Pulsed Laser Peening
… method used to form thin metallic engineering foils,is a manufacturing process utilizing strong shockwaves induced by high pressuresintroduced to the surface of a target by high energy, pulsed laser beams. It is a non-thermal,non-contact approach that improves the hardness and fatigue life of …
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Biomimetic oscillating foil propulsion to enhance underwater vehicle agility and maneuverability
… vehicle (AUV) powered entirely by four flapping foils. Biomimetic actuation is shown to produce dramatic improvements in AUV maneuvering at cruising speeds, while simultaneously allowing for agility at low speeds. Using control algorithms linear in the modified Rodrigues parameters to support …
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Open loop performance of a biomimetic flapping foil autonomous underwater vehicle
Flapping foil propulsion is emerging as an alternative to conventional propulsion for underwater vehicles. MIT's Biomimetic Flapping Foil Autonomous Underwater Vehicle is a prototype vehicle that uses four three-dimensional flapping foil actuators as its means of propulsion. The vehicle providing …
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Biomimetic oscillating foil propulsion to enhance underwater vehicle agility and maneuverability
… vehicle (AUV) powered entirely by four flapping foils. Biomimetic actuation is shown to produce dramatic improvements in AUV maneuvering at cruising speeds, while simultaneously allowing for agility at low speeds. Using control algorithms linear in the modified Rodrigues parameters to support …
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Force and hydrodynamic efficiency measurements of a three-dimensional flapping foil
Investigations into unsteady flapping foil propulsion have shown that it is an efficient and high thrust means of propulsion. Extensive work has been done to optimize the efficiency of two-dimensional flapping foils, varying both the kinematics of the motion and the flexibility of the foil. …
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Amy March: More than Jo’s Foil : Analysis of Little Women’s Amy March
… and selfish and is often referred to as the foil to Jo, the protagonist. She has even been referred to as the antagonist to Jo. This essay aims to analyse Amy’s character and use two of the film adaptations from 1994 and 2019, both of which are directed, written and produced by a female crew, …
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Rib Development in Chick Embryos Analyzed by Means of Tantalum Foil Blocks
Made available in DSpace on 2014-12-10T18:13:41Z (GMT). No. of bitstreams: 1 6915402.pdf: 2915328 bytes, checksum: 34c8505eb90130e9b902d670f5d410ef (MD5) Previous issue date: 1969
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A comparison of experimental and computational analyses of two dimensional foil sections
Thesis (Nav.E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.
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