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 7 of 7 for “"Helicoid"”.
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Volumetric Acoustic Radiation Force Impulse Imaging Using Intracardiac Echocardiography
… array. This dissertation investigates the use of helicoid array transducers to perform ICE-based acoustic radiation force impulse (ARFI) imaging on multiple elevation planes at once, improving on current methods in terms of speed and ease-of-use.</p><p>The Siemens Acuson SC2000 ultrasound scanner …
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Conformal and asymptotic properties of embedded genus-g minimal surfaces with one end
… a more geometric proof of the uniqueness of the helicoid than the original, due to Meeks and Rosenberg [45]. That is, the only properly embedded and complete minimal disks in R3 are the plane and the helicoid. We then extend these techniques to show that any complete, embedded minimal surface …
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Swirling jets for the mitigation of hot spots and thermal Sstratification in the VHTR lower plenum
… key LP thermalhydraulic phenomena. Thereafter, a helicoid vortex swirl model was developed to investigate the impact of the swirl number (S) on mixing and heat transfer. The development of azimuthal and axial velocities that are purely functions of S permitted the analysis of the central …
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Bending and warpage of elastic plates
… that a familiar soft mode of the catenoid to helicoid transformation of an isotropic material no longer exists with material anisotropy.
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The design and construction of a liquid-liquid solvent extractor with reflux
… The extraction assembly consists of a single helicoid flight with a pitch of two, wound around and welded to a standard two-inch pipe, and machined to a “light driving fit” within a five-foot length of standard five-inch heavy duty pipe which had been bored to a diameter of five inches. The …
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Diseño de simulación del engranaje, estudio del contacto y análisis tensional de engranajes cilíndricos rectos y heliocoidales de bajo ruido y contacto mejorado
… y fabricación de engranajes cilíndricos rectos y helicoidales de bajo nivel de ruido y vibración, así como de transmisiones de engranajes de cara que permiten la transmisión de potencia entre ejes que se intersectan con relaciones de transmisión relativamente grandes. La superficie de contacto se …
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Structural colour from a helicoidal cellulose architecture in the secondary cell wall: Optical properties, cell wall composition, structure and morphology of components, and their assembly and interactions.
… of assembling cellulose microfibrils into helicoidal structures. Examples of these architectures can be found in phylogenetically distant species and in different tissues of plants, such as in the endocarp of the fruit of $\textit{Margaritaria nobilis}$, an eudicot, and in the fronds of …