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 40 for “"Clog"”.
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Design Theories for Compact, Low-energy, Clog-resistant Drip Irrigation Emitters
… new design theories for compact, low-pressure, clog-resistant drip emitters that can make drip irrigation affordable, reliable, and easier for farmers to adopt. Broad adoption of water-efficient irrigation methods such as drip irrigation is imperative to sustainably meet projected global food …
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Applying an Organizational Approach to the Sociology of Leisure: A Study of Clog Dancers
… In this study, I focused on the leisure group of clog dancers. My research questions, derived from this approach, include (1) How do clogging groups recruit their members? (2) How are people socialized into their role as cloggers and group members? (3) Do cloggers form a special identity because …
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Calcium Carbonate Formation in Water Distribution Systems and Autogenous Repair of Leaks by Inert Particle Clogging
… and stop pipeline leaks via self-repair or clogging. Ironically, the actions we are taking to increase the lifespan of distribution systems (i.e. adding corrosion inhibitors) might have worsened leaks and pipe lifespans due to interference with self-repair. The increasing occurrence of …
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An investigation into the lithological source of iron in the Kammanassie Mountain aquifer
… Africa. The precipitation causes boreholes to clog and limits full use of well fields in the area. The iron is naturally occurring and this project sets out to identify the lithological source of the iron and in what form the iron is presented. The Table Mountain Group (TMG) aquifer is a …
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Artificial Intelligence-Based Prediction of Permeable Pavement Surface Infiltration Rates
… lab specimens were constructed and subjected to clogging cycles while obtaining surface images and infiltration data. An artificial neural network was created to investigate the relationship between the images of the pavement surface and its associated surface infiltration rate. Results indicated …
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Transmitting craft knowledge : designing interactive media to support tacit skills learning
… in the fields of traditional bowl turning and clog making.</p> <p>In the first project I experimentally used a systems-orientated approach to explore the tacit knowledge within the practice of an experienced traditional bowl turning practitioner. This involved eliciting craft knowledge from the …
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Evaluation of slurry injection for the determination of metals in solid samples using inductively coupled plasma atomic emission spectrometry
… at the argon plasma. The nebulizer tends to clog and a large fraction of particles is lost in the spray chamber due to their weight. The conventional argon plasma is not energetic enough to vaporize the analyte. In this project, a clog free Babington nebulizer was used. A …
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Trophic Interactions And The Efficacy Of Milfoil Weevils For Biocontrol Of Eurasian Watermilfoil In Wisconsin Lakes
… macroinvertebrates, impacts recreation, and can clog water supply infrastructure. The milfoil weevil (Euhrychiopsis lecontei Dietz) has been associated with EWM declines in several states, though natural weevil densities are generally too small to effect control. Augmentative biocontrol has had …
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Microscopic study of salt precipitation dynamics during the injection process of CO2 storage in saline aquifers
… However, salt precipitation during injection can clog pores and reduce permeability. Understanding the dynamics of this process, influenced by injection flow rate, pore structure, and brine properties, is crucial for optimizing CCUS strategies. This thesis examines the impact of salt precipitation …
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Simulation of filtration for suspension transport in porous media
… that particles collect, mound up and ultimately clog the pore under the action of hydrodynamic and gravitational forces. By simulating particle deposition processes at the pore scale, the current analyses provide a more realistic physical framework for interpreting filtration experiments than …
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Inducing Liquid Evaporation with Hygroscopic Gels
… of minerals which can ultimately clog the sweat duct and prevent sweating.
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Concrete at high temperatures: hygro-thermo-mechanical degradation of concrete
… with heated concrete, such as moisture clog, gas pressure build-up, etc. are all captured by the presented model. The thesis concludes by considering the analysis of prestressed concrete pressure vessel.
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Portable blood plasma separation for point of care diagnostics
… total volume. These blood cells can rupture, clog devices, block optical readouts, and foul electrodes. At the same time, the liquid portion of human blood, plasma, is rich in a variety of disease indicators, many of which have not yet been identified, and thus is an essential part in the …
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Physical-chemical treatment of landfill leachate : technological performance, spectral characterization and cost estimations
… weight humic compounds that would otherwise clog the GAC adsorption sites, and that GAC unselectively removes DOM components hereby improving the overall performance. Ion exchange can be used to recover ammonium from the raw landfill leachate with complete removal. Overall, (post)-treatment …
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Design Theory for Channel-less, Low-Pressure, Pressure-Compensating Drip Emitters
… expenses. Another barrier to adoption is clogging within emitters that leads to increased maintenance costs and lifespan constraint of the system. To address this challenge, this thesis proposes a design theory for emitters that could be clog-resistant in addition to being low-pressure by …
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The effect of three holding tank chemicals on anaerobic wastewater treatment
… which would promote excessive bio-mat growth and clog the system. Laboratory septic tanks were constructed and operated for this evaluation. Methanol, paraformaldehyde and formaldehyde were each listed as an active ingredient in one of three chemical compounds used by recreational boat owners to …
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Investigations of Asphaltene-Metal Interactions
… of production/transportation pipelines and clog the pipeline partially or completely. Why asphaltenes deposit on a metal surface remains a poorly understood topic. This thesis investigates asphaltene-metal interactions through physical and chemical characterization of the adsorption …
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Relationship of moulding pressure and weigh of granulate in improving the mechanical and characteristics of biopolymer from renewable resources
… cooking oil down to the drain or sewers leads to clog and odour as well as damage wastewater leading to problems for humanlife. Thus, in this research, vegetable waste cooking oil is used as raw material to produce foam. This foam was crosslink with flexible isocyanate type Polymethane Polyphenyl …
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Denitrifying woodchip bioreactors for aquaculture manifold design and potential water reuse
… as characteristics unique to wastewater may clog a bioreactor’s inlet. Another challenge for this application is that bioreactor outflows are discharged from the facility which is conceptually inconsistent with water-saving RAS design that favors in-process water recycling. The objectives of …
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