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1	Investigation of Coal Dust Remediation using a Surfactant in an Aqueous Solution Brown, Connor Burton 07 June 2017 (has links) In addition to ventilation practices, the application of water via sprays is the most economical and popular means of combating respirable dust in an underground coal mine. Due to a noticeable increase in black lung among coal miners and new dust regulations, surfactants or wetting agents have been used to aid in dust suppression. The surfactant facilitates the wetting process by lowering the surface tension and allowing the hydrophobic coal dust to come into contact with the water. One of the most straightforward and effective benchtop tests is a simple wetting test. Although there are variations of this type of test, principle and technique remain the same. A known amount of dust was placed on the surface of a solution and the time it takes for all the dust to fall through the interface would be the wetting rate. This investigation examined the specific density of the bulk dust and concentration of a surfactant in solution and their effects on the wetting rate. It was found that both factors were significant in determining the wetting rate. It was seen that the surfactant had a more significant effect on the dust which consisted mostly of coal particle when compared to a dust with a higher non-coal mineral content. Additionally, full-scale tests were conducted to determine the effect of the surfactant at a constant concentration. During the field implementation, the surfactant was pumped through the mines spray water to the cutter heads of the continuous miner. A large number of uncontrollable variables present during the implementation, made determining the effects difficult, and the resulting impact from the surfactant inconclusive. Further long-term testing would be needed while accounting for all of the identified variables. Significantly higher concentration was however found when using the continuous personal dust monitor as opposed to the older personal dust samples when left in the same environment. Additionally, a very significant drop in dust concentrations was observed when the miner operators were allowed to activate the scrubbers. / Master of Science Coal Dust Surfactant Black Lung Scrubber
2	Breathing Matters : Feminist Intersectional Politics of Vulnerability / Breathing Matters : En feministisk intersektionell sårbarhetens politik Górska, Magdalena January 2016 (has links) Breathing is not a common subject in feminist studies. Breathing Matters introduces this phenomenon as a forceful potentiality for feminist intersectional theories, politics, and social and environmental justice. By analyzing the material and discursive as well as the natural and cultural enactments of breath in black lung disease, phone sex work, and anxieties and panic attacks, Breathing Matters proposes a nonuniversalizing and politicized understanding of embodiment. In this approach, human bodies are onceptualized as agential actors of intersectional politics. Magdalena Górska argues that struggles for breath and for breathable lives are matters of differential forms of political practices in which vulnerable and quotidian corpomaterial and corpo-affective actions are constitutive of politics. Set in the context of feminist poststructuralist and new materialist and postconstructionist debates, Breathing Matters offers a discussion of human embodiment and agency reconfigured in a posthumanist manner. Its interdisciplinary analytical practice demonstrates that breathing is a phenomenon that is important to study from scientific, medical, political, environmental and social perspectives. / Andning är inte ett vanligt förekommande ämne inom feministiska studier. Breathing Matters introducerar detta fenomen som har en potential för feministiska intersektionella teorier, politik, social rättvisa och klimaträttvisa. Genom analyser av materiella, diskursiva, naturliga och kulturella dimensioner av andningens formationer, i sjukdomen pneumokonios, telefonsexarbete samt ångest och panikattacker, föreslår Breathing Matters en icke-universialiserande och politiserad förståelse av förkroppsligande. Genom denna ansats konceptualiseras mänskliga kroppar som agentiella aktörer i en intersektionell politik. Magdalena Górska argumenterar att kampen för att andas och för andningsbara liv är ett angeläget ämne för differentiella former av politisk praktik. Denna sårbara och vardagliga praktik som både består av kroppsmateriella och kroppsaffektiva handlingar konstituerar politik. Placerad i en kontext av feminist poststrukturalistisk, nymaterialistisk och postkonstruktivistisk debatt erbjuder Breathing Matters en diskussion kring mänskligt förkroppsligande och agentskap som är omkonfigurerad på ett posthumanistiskt sätt. Den tvärvetenskapliga analytiska praktiken visar att andning är ett fenomen som är viktigt att studera från vetenskapliga, medicinska, politiska, miljömässiga och sociala perspektiv. Breath breathing intersectionality vulnerability social and environmental justice black lung phone sex work anxieties panic attacks matterwork embodiment affect agential realism posthumanities postconstructionism new materialism environmental humanities cultural studies feminism gender Andning intersektionalitet sårbarhet social rättvisa och klimaträttvisa pneumokonios telefonsex postkonstruktionism ångest panikattacker materiaarbete förkroppsligande affekt agentiell realism posthumanism nymaterialism miljöhumanism kulturstudier feminism genus

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Investigation of Coal Dust Remediation using a Surfactant in an Aqueous Solution

Breathing Matters : Feminist Intersectional Politics of Vulnerability / Breathing Matters : En feministisk intersektionell sårbarhetens politik