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 64 for “"Blockages"”.
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Institutional blockages in the housing delivery system
Bibliography: leaves 90-94.
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Transient Analysis of Porous Blockages in the Camel C-3 & C-4 Subassemblies
Made available in DSpace on 2017-07-06T18:48:23Z (GMT). No. of bitstreams: 3 Hardy_Bruce_H_MS.pdf: 73320000 bytes, checksum: 0afe7f43bcf89a30e0e4e47426bc606b (MD5) Hardy_Bruce_H_MS_ABS.pdf: 1003497 bytes, checksum: 4074aac3738afec9e9a503fd302e572c (MD5) license.txt: 4813 bytes, checksum: …
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The Effect of Axial Spacing of Constant and Variable Blockages on the Deflagration-to-Detonation Transition in a Pulse Detonation Engine
<p>An investigation was conducted into the effects of obstacle spacing on the deflagration-to-detonation transition section length in a pulse detonation engine. Testing was conducted with one hundred and ninety-five different obstacle, and spacing configurations. The configurations included …
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Development of acoustic sensor and signal processing technique.
… increasingly associated with the presence of blockages. Blockages are difficult to deal with as although there are locations where they are more likely to occur, they do occur intermittently. In order to manage sewer blockage pro-actively sewer managers need to be able to identify the location …
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Numerical and experimental modeling of atherosclerosis related to MRI
… is designed. Experiments with different types of blockages are performed. The measured flow parameters are pressure and velocity profiles in a crosssection of the modeled artery. A commercial software package is employed for the numerical simulation of blockages with similar geometries to those …
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Probability based scheduling to optimize sewer maintenance
… much in recent years. This thesis focuses on the blockages of sewer lines, which cause nearly half of the SSOs. A simulation model is developed to analysis efficiency of different inspection programs. A combined factor, which affects the interval time between blockages, is described by …
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A process for improving transit service management during disruptions
… response. Hold-ins, scheduled bus route blockages, and rail blockages should be entirely pre-planned, while unpredictable disruptions, such as standing vehicles and unplanned bus route blockages, should have response guidelines developed by route segment, direction, and time of day. …
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Application of radio-frequency identification (RFID) sensors for smart- monitoring applications in sewer systems
… of health risks for our societies. Sewer blockages and inflow/infiltration (I/I) issues in sewer systems are some of the challenges faced by water authorities. Due to their hidden nature, these assets cannot be frequently assessed and maintained in optimal conditions. The lack of …
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Experimental Investigation of Liquid and Particle -Laden Flows in Microtubes
Since flow blockages are the ultimate form of increased flow resistance, the research emphasis is focused on the mechanisms that lead to blockage. Different blockage mechanisms are observed in different regimes defined by the ratio of particle diameter to tube diameter. For example, for 0.33 D < dp …
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A Retrospective Review of the Technical Success of Endoscopic Stenting for Malignant Gastric Outlet Obstruction
… complications occurred with thirteen stent blockages due to tumour in-growth (10%), one stent fracture and one stent with poor radial expansion. The stent blockages occurred between 3 to 548 days after placement (median 107 days, IQR: 80 – 275 days). Salvage stenting was 100% successful in …
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Feasibility of using Lodox to perform digital subtraction angiography
… determine integrity and the origin of lesions or blockages. Digital subtraction angiography (DSA) is a tool used to improve the clarity of the vessels being imaged for better and easier decision making in diagnostics and planning. Lodox, a low dose x-ray system developed by Debex (Pty) Ltd, a …
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Quels sont les dysfonctionnements en matière de coût qu’une restructuration peut engendrer ?
… adaptability to its environment, more frequent blockages of the production process, constitution of clandestine stocks, etc. These are the downsizings hidden costs.
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Hydrate formation and adhesion on low surface energy materials
… and gas pipelines and are responsible for flow blockages, sometimes leading to catastrophic disasters. Minimizing hydrate adhesion and accumulation of solids on pipelines can effectively address this problem. In this thesis, we reduce the adhesion of cyclopentane hydrates by promoting the …
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Capacity and coverage of mmWave ad hoc networks
… hoc network with directional antennas and random blockages. The coverage probability in the presence of noise and both line-of-sight and non-line-of-sight interference is analyzed and used to derive the transmission capacity. Several reasonable simplifications are used to derive the transmission …
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Process improvement and inventory management using value stream mapping in a biopharmaceutical environment
… where the problem can be readily seen with blockages, starvation, and long cycle times, but must be solved with organizational and other fundamental improvements for improvements to be sustainable. Also presented is a case study showing a root cause and financial analysis relating to the …
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Numerical simulation and experimentation of pulsatile flows in axisymmetric arterial models
… having various structural properties, and blockages of the tube cross sections to simulate the presence of plaque in arteries. The main outcome of the experimentation was a connection between the amplitude and frequency of the pulsations and the volumetric flow rate of the flowing fluid. Of …
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Conflicting discourses in Canadian Aboriginal politics : a case study of the First Nations governance initiative
… that contributes to the understanding of current blockages in governance and policy reforms involving the federal and the Aboriginal governments.
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Traffic flow management under emergency conditions in and around the Virginia Tidewater area tunnels
… of significant capacity reductions or complete blockages of directions of travel, it is desired to know beforehand the impact expected on the surrounding network. Traffic management actions like rerouting policies could be implemented and thus alleviate the problem. MASSVAC2, a computer …
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Misalignment Effects of the Self-Tracking Laser Doppler Vibrometer
… These limitations include physical flow blockages, relating the measurement spot to the structure rotation, data processing issues, and having to physically alter the engine. This work further describes aspects of a self-tracking laser vibrometry system that can be used to measure the …
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Millimeter wave wireless communication: initial acquisition, data communication and relay network investigation
… experience high path loss, directivity and blockages, which severely limits the network performance. The goal of this thesis is to clearly incorporate all the new features at mmWave frequencies, on top of which to provide new state of the art schemes regarding different communication phases. …
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