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 202 for “"balloon"”.
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Endoscopic large-balloon dilation alone versus endoscopic sphincterotomy plus large-balloon dilation for the treatment of large bile duct stones
… sphincterotomy (EST) combined with large-balloon dilation (LBD) has been proposed as an alternative to manage large bile duct stones. However, recent reports indicate that LBD without EST may be safe and effective in this setting. One hundred thirty-one patients with large common bile duct …
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Balloon-type CLT Shearwalls: Lateral Deformation and Kinematic Behaviours
Balloon-type Cross-Laminated Timber (CLT) shearwall systems have been increasingly adopted as lateral load-resisting systems in mid-rise timber buildings. Compared with platform-type configurations, balloon-type shearwalls mitigate bearing failure associated with perpendicular-to-grain compression …
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Model-agnostic Methodology for High-Altitude Balloon Mission Planning
High-altitude balloons (HABs) are increasingly used for atmospheric science, technology validation, Earth observation, and resilient communications. There is a need for modeling HABs in multi-domain missions, and a key challenge for incorporating them is their flight trajectory dependence on …
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Hemodynamic outcomes of weaning intraaortic balloon counterpulsation in heart failure
… year in the United States require intraaortic balloon counterpulsation (IABC) for the treatment of heart failure. No empirically based protocols exist to guide nurses in the complex process of weaning the heart patient from IABC. Currently, weaning is a complex "trial and error" process and the …
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Simulating the EUSO-SPB2 balloon flight train with Lagrangian mechanics
EUSO-SPB2 is a long duration balloon experiment that will fly two optical astroparticle telescopes; a fluorescence telescope and a Cherenkov telescope. These telescopes have a 0.1\degree pointing resolution requirement. The telescope of interest is the on-board Cherenkov telescope that rotates …
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Pneumatic balloon dilatation versus laparoscopic Heller's myotomy in idiopathic achalasia
… Heller's myotomy (LHM) and pneumatic balloon dilatation (PBD) are widely used in the management of achalasia, but there is still no clarity as to which of these interventions is the best treatment for patients with the condition. Methods Newly diagnosed achalasia patients were …
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The Next Generation Balloon-Borne Large Aperture Submillimeter Telescope (blast-Tng)
… task. However, the successful flight of the Balloon-born Large Aperture Submillimeter Telescope for Polarimetry (BLASTPol) generated maps with thousands of independent polarization measurements of molecular clouds, and ushered in a new era of empirical modeling of molecular cloud dynamics. …
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Risk analysis model for the ascent phase of scientific balloon operations
The National Scientific Balloon Facility (NSBF) conducts scientific balloon flights. Scientific payloads ranging from a few hundred up to several thousand pounds suspended weight are flown over the southern United States. People living in these areas are subject to risk from these operations. A …
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Observing the galactic plane with the Balloon-borne Large-Aperture Submillimeter Telescope
… achievable from ground-based observatories. The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) observes the sky from an altitude of 40 km, above 99.5% of the atmosphere, using a long-duration scientific balloon platform. BLAST observes at 3 broad-band wavelengths spanning 250-500 …
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Effect of Vertebroplasty with Bone Filler Device and Comparison with Balloon Kyphoplasty
BACKGROUND CONTEXT: Vertebroplasty and kyphoplasty are popular procedures for osteoporotic vertebral compression fractures. Although the kyphoplasty has a superior effect, it destroys normal vertebral trabecular structure and it has a higher cost. PURPOSE: To analyze vertebroplasty with a bone …
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Control and monitoring of an intra-aortic balloon pump for cardiac assist
… for controlling and monitoring the Intra-Aortic Balloon Pump is described. A narrow band-pass filter is used to reduce noise and limit the input to the detector to the spectrum within which the R-wave of an ECG signal lies. A safety circuit to prevent the heart pumping against an inflated balloon …
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Measurement dynamic strain induced by balloon-expandable endovascular stents in arterial walls
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Investigation of Inorganic Stratospheric Bromine using Balloon-Borne DOAS Measurements and Model Simulations
… to chlorine. In this study, stratospheric balloon-borne DOAS (Differential Optical Absorption Spectroscopy) measurements of bromine-monoxide (BrO) were analysed and interpreted using the 3-D CTM (Chemical Transport Model) SLIMCAT [Chipperfield98] and a 1-D photochemical model. Photochemical …
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Development of superconducting microwave resonators for terahertz intensity mapping from balloon and space
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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The impact and rupture of a water-filled balloon on a rigid surface
The dropping of a water-filled latex balloon onto a flat, rigid surface is an experiment that is known and has been performed by many, but on which there is no existing published work. High-speed images taken of the process revealed a range of phenomena, many of which had not been previously …
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