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Dissertationen zum Thema „Erosion“

Autor: Grafiati

Veröffentlicht am 4. Juni 2021

Zuletzt aktualisiert am 25. Juli 2025

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1

Åsen, Kristina, and Anna Boking. "Dental erosion : kolsyrade vattens erosiva potential." Thesis, Kristianstad University College, School of Health and Society, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-5272.

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<p>Syftet med studien var att undersöka den erosiva potentialen av vanligt förekommande kolsyrade vatten med eller utan smaksättning. Studien genomfördes som en laboratoriestudie vid Institutionen för Odontologi vid Göteborgs universitet. Totalt omfattades studien av 34 buteljerade kolsyrade vatten med eller utan smak, tre kolsyrade vatten producerade i kolsyreapparat samt sex referensdrycker. Samtliga produkter testades genom registrering av initialt pH med pH-elektrod och buffring med 0,1 M NaOH till det värde då pH neutraliserats. Dryckens surhetsgrad beräknades därefter vilket anses som et

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Giovanini, Junior Nelson. "Análise e aplicação de metodologias de predição de processos erosivos utilizando SIG na Bacia Hidrográfica do Córrego do Engano, Nova Canaã Paulista - SP /." Ilha Solteira, 2019. http://hdl.handle.net/11449/181272.

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Orientador: César Gustavo da Rocha Lima<br>Resumo: A bacia hidrográfica é uma unidade geomorfológica que agrega os impactos das interferências antrópicas e naturais sobre os recursos hídricos. Mudanças significativas nas características de uma bacia, causadas por processos naturais ou atividades antrópicas, podem gerar alterações, efeitos e impactos na estabilidade biótica e abiótica do sistema, desencadeando desequilíbrios ambientais e, portanto, a degradação da paisagem. Dentre os processos causadores dessa degradação, destaca-se a erosão dos solos. A erosão é um processo geológico responsáv

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Hamlin, Lauren Kearns. "Erosion." The University of Montana, 2009. http://etd.lib.umt.edu/theses/available/etd-05282009-130629/.

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Lönnborg, Pernilla. "Erosion." Thesis, KTH, Arkitektur, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168677.

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Byggnader är under ständig förändring. Den omkringliggande miljön orsakar en nedbrytning i form av vittring. Material som bryts ner. Vi vet att en byggnad inte kommer att finns för alltid så vad händer om vi låter nedbrytningen vara en tillgång. Naturens processer ger oss perspektiv på tid. Årstider som följer varandra. Berg som eroderar och formeras. Hur kan man förstärka upplevelsen av tid och rum genom en byggnad som tillåts interagera med den omkringliggande miljön och vara under ständig förändring?<br>Buildings are constantly changing. The surrounding environment partly causes a breakdown

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Slotte, Mikael. "Erosion." Thesis, KTH, Arkitektur, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146183.

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Rosenlunds sandbankar är ett naturskyddsområde mellan Jönköping och Huskvarna som rasar med ungefär 30 cm per år. Platsen tillåts att årligen krympa men inte att användas. Det görs inga större ansatser för att dokumentera den för framtida generationer eller synliggöra den för nu levande generationer. I detta examensarbete undersöks ett naturligt fenomen som kommer att påverka civilisationer i tusentals år. Examensarbetet syftar i första hand till att återintroducera en bortglömd plats och beskriva hur den förändras i tid och rum. Med hjälp av studier om erosion, landhöjning, istid och med hjäl

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Dotson, Matthew. "Erosion." Diss., University of Iowa, 2010. https://ir.uiowa.edu/etd/490.

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In my work I am often drawn to relatively simple systems that unfold before the listener. In Erosion, there are several of these processes which unfold simultaneously. The piece begins with a pitch cluster that gradually spreads into total chromatic saturation (about half-way through the piece) before shrinking back into clusters. As this is happening there is, on a macro level, a gradual speeding of events throughout the entire duration of the work. The interactions between this linear progression in the time domain and the (relatively) cyclical progression in the frequency domain form the ma

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Garcia-Chevesich, Pablo Andres. "Erosion Processes and Control." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195844.

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This dissertation represents a unique contribution to the Spanish literature of soil erosion. The author of this document has written and published "Procesos y control de la erosion", a textbook about the engineering of soil erosion processes and the design of the most up-to-date methods and products used for erosion control. The text has been presented in Appendix A.Besides the above, the author of this dissertation is an active committee member at the International Erosion Control Association (IECA), specifically the International Development and the SOIL Fund programs. IECA members are dra

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Cruz, Carla da [UNESP]. "Análise comparativa da evolução das boçorocas nos anos de 1962 e 1999 nos municípios de Pompéia e Oriente SP." Universidade Estadual Paulista (UNESP), 2003. http://hdl.handle.net/11449/92940.

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Made available in DSpace on 2014-06-11T19:26:15Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-01-13Bitstream added on 2014-06-13T18:54:25Z : No. of bitstreams: 1 cruz_c_me_rcla.pdf: 5048620 bytes, checksum: c2c3ba7c2e63bbfe95d39f75f71b9604 (MD5)<br>Realizou-se neste trabalho a análise comparativa entre boçorocas existentes no ano de 1962 com as do ano de 1999, enfocando sua evolução, estabilização e reutilização nos municípios de Pompéia e Oriente, localizados no Planalto Ocidental Paulista, Esta análise constituiu-se de fotointerpretação de fotografias aéreas da área de estudo, na

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Oliveira, Rodolfo Lopes de Souza. "Análise e caracterização da dinâmica geomórfica erosiva da área urbana de Alfenas, sul de Minas Gerais." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/8/8135/tde-13052015-112055/.

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Os processos relativos à urbanização promovem alterações nas dinâmicas naturais, inclusive, sobre o relevo. Assim, a Geomorfologia apresenta-se como uma área de conhecimento importante para orientar a ocupação, estudando a evolução das formas e como estas passam a ser definidas na paisagem. Por essa premissa, este trabalho objetiva analisar o grau de suscetibilidade dos materiais superficiais e da morfologia do relevo da área urbana de Alfenas MG a processos erosivos, justificando-se pela sua proposta de direcionamento para entender as respostas e as reações do relevo e do uso do solo às prec

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Schmidt, Walter, and Marcus Schindewolf. "Erosion 3D Sachsen." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-38172.

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Für die Erstellung von Bewirtschaftungs- und Maßnahmenplänen (FFH, EU-WRRL) ist es erforderlich, den bislang noch sehr hohen Aufwand für die Datenbeschaffung und -generierung im Rahmen der Modellierung mit EROSION 3D zu senken. Erreicht werden soll eine schnellere sowie effizientere Abschätzung von Landnutzungsänderungen, Landschaftseingriffen, des Klimawandels usw. auf Oberflächenabfluss, Bodenabtrag sowie Sedimenteintrag in Gewässer mit EROSION 3D. Im vorliegenden Projekt ist es gelungen, Parametrisierung und Modellanwendung so zu kombinieren, dass eine Bodenabtragssimulation mit dem Modell

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Dormoy, Thomas Gerard. "Arctic Coastal Erosion." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bygg, anlegg og transport, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-27046.

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With the recent increase of interest in Arctic, the need rises for new tools for understanding the typical mechanisms of this very unique and so vulnerable area. The coast, which concentrates nearly all of the human activities, is in the front line and probably the most critical part of the system. Trough the past decades, mappings of the Arctics shorelines point out huge erosion rates and show the threat of a climate change upon the coast. Recent studies seem to link those tremendous moves to the annual thermal variations within the soil. However, the mechanisms of thermal abrasion that

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Cruz, Carla da. "Análise comparativa da evolução das boçorocas nos anos de 1962 e 1999 nos municípios de Pompéia e Oriente SP /." Rio Claro : [s.n.], 2001. http://hdl.handle.net/11449/92940.

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Orientador: Joel Barbujiani Sígolo<br>Banca: Leandro Eugenio da Silva Cerri<br>Banca: Paulo César Fonseca Giannini<br>Resumo: Realizou-se neste trabalho a análise comparativa entre boçorocas existentes no ano de 1962 com as do ano de 1999, enfocando sua evolução, estabilização e reutilização nos municípios de Pompéia e Oriente, localizados no Planalto Ocidental Paulista, Esta análise constituiu-se de fotointerpretação de fotografias aéreas da área de estudo, na escala 1:25. 000, e trabalhos de campo que incluíram o cadastramento e mensuração das boçorocas do primeiro período, e suas alterações

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Dun, Shuhui. "Adapting WEPP (Water Erosion Prediction Project) for forest watershed erosion modeling." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Thesis/Summer2006/S%5FDun%5F073106.pdf.

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Ferdos, Farzad. "Internal Erosion Phenomena in Embankment Dams : Throughflow and internal erosion mechanisms." Doctoral thesis, KTH, Byggvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-193627.

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In this study, two major internal erosion initiation processes, suffusion and concentrated leak mechanisms, which lead to both defect formation in a dam’s body and its foundation and high throughflow in dams subjected to internal erosion were studied. This understanding has the potential to facilitate numerical modelling and expedite dam safety assessment studies. The throughflow properties of coarse rockfill material were studied by; analysing filed pump test data, performing extensive laboratory experiments with a large-scale apparatus and numerically simulating the three-dimensional flow t

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Boden, Wiebke. "Prediction of erosion damages in hydraulic machines for hydro-abrasive erosion." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEC034/document.

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L’énergie hydraulique, où l’énergie cinétique de l’eau est transformée en énergie électrique, représente une contribution importante aux énergies renouvelables. L’eau qui passe par les turbines hydrauliques contient toujours une partie solide, par exemple du sable et de l’argile. Ces sédiments peuvent atteindre des niveaux de concentration élevés, ce qui nuit considérablement à la structure de la turbine par un mécanisme d’endommagement appelé érosion hydro-abrasive. Des types de turbine impliquant des vitesses d’écoulement très élevées, comme les turbines Pelton, sont particulièrement sensibl

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Bertrand, Fabienne. "Fluvial erosion measurements of streambank using Photo-Electronic Erosion Pins (PEEP)." Thesis, University of Iowa, 2010. https://ir.uiowa.edu/etd/642.

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Fluvial erosion incites significant bridge scour and large-scale bank erosion causing estimated $1.1 billion damage in the Midwest. Conventional, manual, field monitoring methods, typically erosion pins, cross-section resurveys or terrestrial photogrammetry, used to monitor fluvial erosion rates merely provide a net change in bank surface retreat since the previous measurement. If mass wasting has occurred, the ongoing fluvial erosion would be masked. Erosion event timing, and the precise bank response to individual flow or flow hydrograph changes, is generally uncertain. Thus, a technique tha

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Smith, Jennifer Lynn. "The use of rolled erosion control products (RECPs) for minimizing soil erosion." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available, full text:, 2007. http://wwwlib.umi.com/cr/syr/main.

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Pickles, Matthew Jonathan. "Hydrodynamic erosion of coatings." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243503.

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Duncan, Helen. "Erosion corrosion by minerals." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278290.

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Feng, Zheng, and Zheng Feng. "The erosion of materials." Doctoral thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/23076.

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Solid particle erosion tests of glass, stainless steel, WC-Co and sintered alumina, have been performed with seven erodents using a range of particle diameters D (63 μm - 1000 μm), velocities V (33 m.s⁻¹ - 131 m.s⁻¹ ) and impact angles α (30° - 90°). The seven erodents are steel shot, glass beads, silica, alumina, tungsten carbide, silicon carbide and diamond· particles. In addition, the target materials have been subjected to cavitation erosion using a conventional ultrasonic horn in distilled water. Systematic studies of the influence of the impact variables on the erosion rate have been mad

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Mahoney, Erin Kathleen. "Erosion Of Primary Teeth." Thesis, Faculty of Dentistry, 2009. http://hdl.handle.net/2123/4612.

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Silveira, Patrícia Borges. "Influencia da escala nos resultados de estimativa de perda de solo por meio da EUPS /." Rio Claro, 2017. http://hdl.handle.net/11449/152620.

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Orientador: Cenira Maria Lupinacci<br>Banca: Leandro de Souza Pinheiro<br>Banca: Salvador Carpi Junior<br>Banca: Sérgio dos Anjos Ferreira Pinto<br>Banca: Fabiano Tomazini da Conceição<br>Resumo: Dentre os recursos naturais que o homem necessita para sobreviver, o solo se insere na lista dos mais importantes, sendo um dos suportes da produção agrícola, a fim de abastecer as populações. Contudo, pesquisadores do mundo todo têm alertado que devido à pressão de uso e ocupação da terra, os solos tendem a se modificarem pela força da água e dos ventos o que ocasionará a formação de desertos. Assim,

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Lüthi, Marcel. "A modified hole erosion test (HET-P) to study erosion characteristics of soil." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/36999.

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Today’s increasing demand for energy and natural resources requires safe and reliable infrastructure. This includes hydraulic earth structures like dikes, levees, or dams. Such structures are susceptible to piping, a fundamental type of internal soil erosion. Piping is one of the principal causes of failures and accidents affecting embankment dams. The Hole Erosion Test (HET) is based on soil piping, and is used to determine the erodibility and critical shear stress of a soil. A soil specimen with a preformed axial hole is subjected to a constant-head pressure flow, and the rate of enlargement

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Choi, Daniel Mintae. "Rainfall intensity and soil erosion by water : limitations of current erosion models and implications for erosion model-based studies under future climates." Thesis, University of Oxford, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604890.

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Existing simulation studies of the effects of future climate change upon erosion indicate that, under land usages that leave the soil unprotected, even minor increases in rainfall amounts are likely to result in disproportionately large increases in erosion, but commonly make the simplifying assumption that distributions of future rainfall intensities remain unchanged from the present. This research aims to determine implications of rainfall -intensity changes on soil erosion using computerised models. Thus, this thesis is a step towards the ultimate goal of predicting future rates of soil ero

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Arantes, Leticia Tondato. "Limiares topográficos de processos erosivos na bacia do Rio Bonito (SP) obtidos a partir de modelo digital de elevação de dados de radar (PALSAR/ALOS) /." Ilha Solteira, 2019. http://hdl.handle.net/11449/183328.

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Orientador: José Augusto Lollo<br>Resumo: A erosão é um fenômeno complexo, uma vez que envolve a ação direta ou indireta de diversos fatores, tais como tipos de solos, clima, vegetação, declividade e ações antrópicas. O estudo acerca da dinâmica, agentes desencadeadores e fatores condicionantes é uma importante ferramenta para uma tomada de decisão. A proposição de índices que indicam o limiar crítico para determinar a ocorrência de processos erosivos, é uma das vertentes dos estudos acerca de processos erosivos, cuja pressupõe-se uma relação entre a declividade (S) e área de contribuição (A),

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Van, der Poel Petrus W. "Plunge pool erosion in cohesive channels below a free overfall /." Connect to resource, 1985. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1202403267.

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Thapa, Bhola. "Sand Erosion in Hydraulic Machinery." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Engineering Science and Technology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-302.

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<p>The topic of this thesis is damage of hydraulic machinery due to sand erosion. This is a very broad topic in which all the aspects of design of hydraulic machinery namely material selection; mechanics of material and hydraulics are involved. The issue of sand erosion is equally important for operation and maintenance of hydropower plants.</p><p>The erosion damage of turbines of hydropower plants in Himalayan Rivers, in particular in Nepal, due to high sediment contents in river is a motivating factor for this research. The findings of this study are believed to help to reduce erosion of tur

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Schindewolf, Marcus. "Phosphoreinträge durch Erosion in Sachsen." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-85270.

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Im Projekt wurde eine Methodik entwickelt, um mit dem Modell EROSION 3D sachsenweit für erosionsauslösende Starkniederschlagsszenarien den partikelgebundene Phosphoreintrag in Oberflächenwasserkörper abzuschätzen. Mit dieser Abschätzung und der Identifikation wassererosionsgefährdeter Ackerflächen bzw. Feststoffeintragspfade in Gewässer lassen sich zur erfolgreichen Umsetzung der EU-Wasserrahmenrichtlinie zielgerichtete Maßnahmen zum Erosionsschutz ableiten. Die Modellierungen mit EROSION 3D zeigen, dass eine konsequente Umstellung auf konservierende Bodenbearbeitung die P-Austräge in Sachsen

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Zhu, Jingxu (Jesse). "Tube erosion in fluidized beds." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/29225.

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Heat transfer tubes suffer erosion when immersed in fluidized beds. This has caused problems, especially in fluidized bed combustors. The mechanism of erosion for horizontal tubes in fluidized beds is not well understood. The purpose of this study was to investigate the erosion mechanism in fluidized beds and to investigate the influence of operating parameters and the mechanical properties of the particles and tube materials. Horizontal tube erosion tests were carried out in a room temperature three-dimensional fluidized bed with a cross-section of 216 mm by 203 mm and height of 1.52 m. Samp

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Duncan, S. "Ion erosion in surface analysis." Thesis, Loughborough University, 1985. https://dspace.lboro.ac.uk/2134/28023.

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Low energy ion bombardment is a process used in surface analysis and in the electronics and telecommunications industries. Techniques such as Auger Electron Spectroscopy (AES), X-ray Photoelectron Spectroscopy (XPS) and Secondary Ion Mass Spectroscopy (SIMS) employ ion bombardment for surface cleaning and for the provision of composition-depth profiles.

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Zhang, Yu 1965. "Erosion behaviour of engineering ceramics." Monash University, School of Physics and Materials Engineering, 2002. http://arrow.monash.edu.au/hdl/1959.1/8404.

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Godwin, Ian Chandler Paterson. "Physiographic Components of Trail Erosion." Thesis, Montana State University, 2000. http://etd.lib.montana.edu/etd/2000/godwin/GodwinI_00.pdf.

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No previous study has sought to discriminate between soil erosion and soil compaction when explaining the "missing" cross-sectional areas of incised trails, assuming instead that erosion was the dominant process. Separating the two processes of erosion and compaction is critical to understanding the relationship between physiographic variables and the structure of trails. The purposes of this project are to estimate the relative effects of compaction and erosion on trail cross sectional area along the New World Gulch Trail, Montana, and to better understand the relationship between erosion, co

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Eltvik, Mette. "Sediment erosion in Francis turbines." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-22755.

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Sediment erosion is a major challenge for run-of-river power plants, especially during flood periods. Due to the high content of hard minerals such as quartz and feldspar carried in the river, substantial damage is observed on the turbine components. Material is gradually removed, thus the efficiency of the turbine decreases and the operating time of the turbine reduces. Hydro power plants situated in areas with high sediment concentration suffer under hard conditions, where turbine components could be worn out after only a short period of three months. This short life expectation causes troub

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Szente, Roberto Nunes. "Erosion of plasma torch electrodes." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74256.

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The erosion of copper electrodes in a concentric cylinder geometry with magnetically driven arcs was studied at steady state for currents up to 250 A in a variety of gases and gas mixtures, magnetic field strengths and gas flow rates. The effects of arc velocity, gas composition, current density and heat transfer to the cathode on erosion rates were examined.<br>The arc velocity varied with the magnetic field strength and arc current accordingly to a newly developed equation, V $ alpha$ B$ sp{0.60}$ I$ sp{0.56}$, when the cathode surface was slightly contaminated with C, Cl, O or N. The compos

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Ewunkem, Asoumu Emmanuel. "Cavitation erosion of engineering materials." Thesis, City University London, 1993. http://openaccess.city.ac.uk/8358/.

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The work presented in this thesis is concerned with evaluating the erosion resistance or behaviour of various engineering materials to cavitation erosion in a through flow device. A wide range of engineering materials have been utilized, from metal alloys, plastics, ceramics to composiles. These were procured from various industrial and research establishments. The metal alloys which were supplied in various condition of heat treatments, ranged from aluminium alloy to nitrided and tool steels. The plastic employed were epoxy resins. These were supplied in two different formulations the "Novala

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Scullion, I. M. "Erosion by solid particle impact." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234058.

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Basic single particle impact studies were carried out on copper, steel and dural. By calculating the coefficient of restitution without employing the usual small indentation approximations, closer agreement was found with experimental data. The experimentally determined dynamic hardness was found to be between 1.3 and 1.4 times the quasi-static indentation hardness. A notable feature of these experiments was the formation of surface rings in the bottom of the impact crater. These impacts were analysed in a manner analogous to that used for the impact of a liquid drop on a rigid substrate where

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Harris, P. K. "Erosion in centrifugal compressor impellers." Thesis, Cranfield University, 1996. http://dspace.lib.cranfield.ac.uk/handle/1826/10622.

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An experimental and theoretical study of erosion in centrifugal compressor impellers is presented. An experimental rig using laser anemometry techniques was employed to create a database of particle restitution ratios for a range of materials. This data was unique in that the particle rebound was measured in a quiescent condition where the aerodynamic effects had been minimised, and also parametric factors not previously available were included. These values were incorporated into the existing Particle Trajectory Code developed by Cranfield University and Rolls Royce PLC. The code is used to c

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Hankey, S. E. "Cavitation erosion of WC-Co." Master's thesis, University of Cape Town, 1987. http://hdl.handle.net/11427/21135.

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Bibliography: pages 68-70.<br>An investigation involving the vibratory cavitation erosion of WC-Co alloys was undertaken in order to determine the mechanisms of material removal. Nineteen grades of WC-Co alloys were studied. These alloys had been previously characterised according to microstructural and mechanical properties. Further characterisation by way of Young's modulus and density of the materials was undertaken. An investigation of the i nfluence of various parameters on cavitation erosion established a binder content dependence on erosion. For two grain sizes, erosion was found to inc

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Wellman, R. G. "Solid particle erosion of ceramics." Master's thesis, University of Cape Town, 1993. http://hdl.handle.net/11427/18219.

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The zeolite ZSM-5 is well-known for its unique intersecting channel system. This channel system has a great bearing on the shape-selective properties and the long life-times of ZSM-5. In this study, ZSM-5 was modified in various ways to eliminate the external acidity of the catalyst to further improve these properties, and the success and effects of these modifications were investigated primarily using temperature programmed desorption techniques. The internal surface of ZSM-5, a medium pore zeolite, plays a major role in the shape selective properties of this catalyst, due to the diffusional

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Conforto, Sesto Juan R. "Erosion in Southern Monterey Bay." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FConfortoSesto.pdf.

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Thesis (M.S. in Meteorology and Physical Oceanography)--Naval Postgraduate School, March 2004.<br>Thesis advisor(s): Edward B. Thornton, James MacMahan. Includes bibliographical references (p. 37). Also available online.

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Pilippu, Hewage Eranga Dulanjalee. "Erosion and entrainment during landslides." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/28901.

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The main focus of this thesis is to experimentally investigate the effect of grain size on the mechanism of erosion during landslides using small-scale laboratory experiments. Specifically, we have focused on the effect of the grain size of the flowing and erodible bed materials on the erosion rate. We experimentally investigated a flow of particles over an erodible base in a laboratory-scale inclined flume with different particle size combinations for the flow and the erodible substrate. The dynamics of the flow-erodible bed interface was captured with X-ray radiography. The evolving erosion

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Chun, Wang. "Erosion-corrosion mitigation using chemicals." Thesis, University of Leeds, 2007. http://etheses.whiterose.ac.uk/747/.

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The presence of entrained sand in oil and gas production is becoming increasingly prevalent as wells age and this is leading to erosion-corrosion in C02-saturated conditions becoming a major mechanism of material attack. Its understanding, prediction and control are key challenges to sound facilities design. The use of carbon steel in conjunction with corrosion inhibitors in preventing erosioncorrosion has been observed as an economically viable solution for oil and gas piping systems. In order to produce highly effective corrosion inhibitors, it is important to understand how inhibitors act o

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Meng, Hang. "Erosion-corrosion of marine alloys." Thesis, University of Leeds, 2009. http://etheses.whiterose.ac.uk/12739/.

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Marine alloys such as stainless steels, copper-base alloys and cast iron have a long history of applications over a wide range of industries. They always are exposed to aggressive erosion-corrosion environments to support or transmit forces during the service, where more than millions of pounds are involved to repair the material degradation every year. In order to minimize this cost, lots of money and research have been put into practice, from which more and more erosion-corrosion behaviour and mechanisms of marine alloys were understood, however, downtime of marine systems still happens, mor

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Deneke, Fred. "Soil Erosion Control after Wildfire." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2002. http://hdl.handle.net/10150/146945.

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DeGomez, Tom. "Soil Erosion Control after Wildfire." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2011. http://hdl.handle.net/10150/239603.

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Pineda, Rondon Saira Freda. "Numerical prediction of cavitation erosion." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEC031/document.

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La cavitation peut avoir lieu dans les turbines hydrauliques. Ce phénomène se produit lorsque les bulles de vapeur s’effondrent à proximité de la surface de la machine. Ceci entraîne des conséquences négatives, telles que l’érosion, affectant ainsi les performances de la machine. L’effondrement d’une bulle de gaz non-condensable dans l’eau est simulé en utilisant la méthode sans maillage SPH-ALE, qui intègre un modèle pour simuler les écoulements compressibles et multiphases. Le modèle résout les équations de conservation de masse, de quantité de mouvement et d’énergie du système d’Euler, en u

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Sigby, Albin. "Förändringsanalys av erosion längs Klarälven." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-74725.

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Klarälven är en av Sveriges längsta älvar och är unik i Skandinavien för sitt karaktäristiska meanderlopp. Det unika i Klarälvens fall är att älvfåran är instängd mellan två bergssidor. Klarälvens meanderlopp innebär erosion och förändringar i älvens lopp. Syftet med studien är att jämföra och analysera hur erosionen längs en sträcka av Klarälven har förändrats över tid. Underlaget består av en historisk karta från 1883 samt ortofoton från 1961 och 2014. Studien är avgränsad till en 25 km lång sträcka norr om Ekshärad i Värmland. Metoder som används omfattar georeferering av den historiska kar

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PIGAZZINI, ILARIA. "Evaluating and Detecting Architecture Erosion." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2022. http://hdl.handle.net/10281/365009.

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Un'architettura software è erosa (o degradata) se mostra una progressiva perdita di integrità strutturale a causa di violazioni dei principi di progettazione. I sistemi erosi soffrono di Architectural Technical Debt (ATD), lo sforzo aggiuntivo richiesto agli sviluppatori per gestire i difetti causati dall'erosione. Un sintomo dell'accumulo di ATD è la presenza di Architectural Smells (AS), decisioni di software design che hanno un impatto negativo sulla qualità interna del sistema software. I sistemi affetti da AS soffrono di maggiori costi di manutenzione e sono più difficili da evolvere. Que

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Mazur, Rogério Lago [UNESP]. "Análise do desgaste erosivo por partícula sólida em superligas à base de níquel." Universidade Estadual Paulista (UNESP), 2004. http://hdl.handle.net/11449/97116.

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Made available in DSpace on 2014-06-11T19:28:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2004-11Bitstream added on 2014-06-13T20:58:35Z : No. of bitstreams: 1 mazur_rl_me_guara.pdf: 2192483 bytes, checksum: 24772053abc0675fdf4455448fe4adc3 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Universidade Estadual Paulista (UNESP)<br>As superligas à base de níquel são aplicadas nos mais diversos e complexos sistemas de engenharia, entretanto há poucos dados sobre o comportamento erosivo destas superligas frente ao impacto de particulas sólidas em um fluxo g

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Campos, Camila Jorge Moretti de [UNESP]. "Avaliação da erodibilidade pelo método Inderbitzen em solo não saturado da região de Bauru - SP." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/115945.

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Made available in DSpace on 2015-03-03T11:52:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-06-30Bitstream added on 2015-03-03T12:07:06Z : No. of bitstreams: 1 000805832.pdf: 4937874 bytes, checksum: bcf1424a8c5e4cca59263834d615aa4a (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nivel Superior<br>Esta dissertação de mestrado apresenta resultados acerca da avaliação da erodibilidade de um solo não saturado localizado em uma área urbana de Bauru-SP afetada por um processo erosivo. O processo erosivo em questão se desencadeou devido a intervenção antrópicas no local sem devida

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