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Dissertations / Theses on the topic 'Natural threat'

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1

Adrees, Muhammad. "Nitrogen and ozone pollution : a threat to natural ecosystems." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/9611.

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During the last century, inputs of reactive nitrogen (N) to ecosystems have more than doubled as a result of anthropogenic activities. There is strong evidence that N has reduced the diversity of plant species in a range of habitats of high conservation value. The effects of atmospheric N deposition on the structure and functioning of natural and semi-natural ecosystems have been well studied. There has, however, been little investigation of the contrasting effects of reduced versus oxidised N, or of the importance of frequency of inputs. This thesis involves a study which investigates the res
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2

Bowman, Harry Albert. "Optimizing Transportation Infrastructure Improvements For Networks Under The Threat of Natural Hazards /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487929745332846.

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Skobalj, Nedo. "Validating vehicleLang for Domain-specific Threat Modelling of In-vehicle Networks." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-249601.

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Due to technological developments, vehicles have gone from mechanically controlled machines to software controlled, connected machines. Increased reliance on software to operate and wireless connections to external services have exposed vehicles to a new threat, cyber attacks. Because of this threat, development of new tools has been required to improve and ease the process of securing vehicles against attacks. One such tool is vehicleLang, a probabilistic threat modelling and attack simulation language specifically designed for the automotive domain. However, vehicleLang has been developed ba
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Clarkberg, Jasper W. "Regulatory Uncertainty and the Natural Gas Industry in the US." Oberlin College Honors Theses / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1495560884199246.

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5

Gilbert, Martin. "Understanding and managing canine distemper virus as a disease threat to Amur tigers." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7949/.

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The endangered population of Amur tigers (Panthera tigris altaica) in the Russian Far East (RFE) faces an increasing risk of extinction due to infection with canine distemper virus (CDV). Short-lasting CDV infections are unlikely to be maintained in small populations of species with limited connectivity like tigers, where viruses fade out as susceptible hosts are depleted. Multi-host pathogens can persist in more abundant host species that can act as reservoirs of infection for threatened populations. This study combines assessments of host demography, serology and viral phylogeny to establish
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Holzer, Corey T. "The application of natural language processing to open source intelligence for ontology development in the advanced persistent threat domain." Thesis, Purdue University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10249704.

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<p> Over the past decade, the Advanced Persistent Threat (APT) has risen to forefront of cybersecurity threats. APTs are a major contributor to the billions of dollars lost by corporations around the world annually. The threat is significant enough that the <i>Navy Cyber Power 2020</i> plan identified them as a &ldquo;must mitigate&rdquo; threat in order to ensure the security of its warfighting network. </p><p> Reports, white papers, and various other open source materials offer a plethora of information to cybersecurity professionals regarding these APT attacks and the organizations behind
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Jansson, Öhlén Linn. "Fear of influenza vaccination in the event of an epidemic : Perceptions of threat and trust in two socioeconomically different areas of Stockholm." Thesis, Södertörns högskola, Miljövetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-39222.

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In recent history, four influenza pandemics have occurred causing worldwide suffering. It is only a matter of time when a fifth pandemic will emerge. The willingness of the public to perform recommended precautionary actions is central for successful outbreak management, where the most important measure is vaccination. Trust in the health care system as well as personal perceptions of the threat of a pandemic can influence the publics willingness to perform precautionary actions. Aims: This study seeks to analyze how the public in two socioeconomically different areas of Stockholm perceive the
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Hassan, Abbas Cattie. "Feeling Close to Someone : The Neural Correlates of Social Connection." Thesis, Högskolan i Skövde, Institutionen för biovetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-17921.

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During the course of human evolution, being a member of a group has been more beneficial for survival than being alone. Food gathering, protection from predators, cooperation, and care for offspring are distributed among group members, increasing the likelihood for survival. It is as if there is an interplay between agent and environment that interprets being socially cooperative as pleasurable and being left out as painful. Studies have been dedicated to examine how our social life is one of the most important aspects of health and well-being, particularly social relationships. Since this lin
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9

Bergh, Johannesson Kerstin. "Traumatic Exposure, Bereavement and Recovery among Survivors and Close Relatives after Disasters." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-120200.

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Byrd, Lawrence Allen. "The public land manager in collaborative conservation planing: a comparative analysis of three case studies in Montana." Diss., [Missoula, Mont.] : The University of Montana, 2009. http://etd.lib.umt.edu/theses/available/etd-06122009-134838.

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Shu, Yutong. "Natural analogues for geological carbon storage." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31393.

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In CO2 storage sites, seal has a vital role in inhibiting migration of the supercritical CO2 to other geological strata. The major difficulties in studying seals include two aspects: lack of available samples (especially for saline aquifers), and the difficulty to study over geological time and spatial scales. The analysis of natural analogue has been chosen to overcome these difficulties. Hydrocarbon fields are used to investigate the pore throat radii, which is the major factor for capillary sealing of caprocks, using newly established statistics model. Natural CO2 springs at Green River, Ut
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Etienne-Leveille, Valerie. "Three studies of natural xanthophylls." FIU Digital Commons, 2003. http://digitalcommons.fiu.edu/etd/3282.

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The purpose of this work was to isolate and study the oxidation of a carotenoid known as lactucaxanthin; to determine the dose vs. serum response of human subjects in a supplementation study of lutein, zeaxanthin, and meso-zeaxanthin; and to initiate an investigation of lutein in larval monarch butterflies. Our interest in lactucaxanthin arises because of its close structural homology to a keto carotenoid in human blood. The isolation of lactucaxanthin from Romaine Lettuce was accomplished by use of the reversed-phase HPLC. Preliminary results from the oxidation of lactucaxanthin using MnO2 sh
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Janis, Sean Patrick. "Interactive natural user interfaces /." Online version of thesis, 2010. http://hdl.handle.net/1850/12267.

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Alves, Andreia Filipa Pinho. "Prevenção, preparação e mitigação do risco de desastres naturais : a experiência da Oikos em El Salvador." Master's thesis, Instituto Superior de Economia e Gestão, 2011. http://hdl.handle.net/10400.5/10145.

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Mestrado em Desenvolvimento e Cooperação Internacional<br>Nas últimas décadas tem-se verificado um aumento considerável na frequência e intensidade de desastres naturais. A preocupação daí consequente reflectiu-se na intensificação, desde os anos 70, de reflexões académicas e publicações, resultantes de encontros e conferências, de âmbito nacional e internacional - como as conferências mundiais sobre prevenção de desastres. Nos anos 90, decretada a Década Internacional para a Prevenção de Desastres, deu-se uma transição de paradigma em relação aos desastres naturais: de uma cultura de reacção
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Paget, Nicolas. "Facing threats by sharing information for natural resources management." Thesis, Paris Sciences et Lettres (ComUE), 2016. http://www.theses.fr/2016PSLED059/document.

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Nous explorons le lien entre partage d'information (PI) et gestion collective de ressources naturelles (GRN). Pour déterminer ce lien, nous nous sommes interessé aux ostréiculteurs, acteurs sensibles à la qualité de l'eau et touchés par un virulent virus. Ces acteurs ont développé et utilisent divers artéfacts de PI. Ces artifacts sont destinés à faire face à des menaces potentielles. L'identification de ce point fondamental a mené à développer le concept de menaces. Elles sont définies par le modèle (Acteurs, Caractéristiques, Infrastructure, Décisions, Environnement). Elles sont organisées
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Mohtadi, Soran. "Three essays on the relationship between natural resources, economic development and political institutions." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/667222.

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Esta tesis examina la relación que existe entre los recursos naturales y el desarrollo económico de los países, teniendo en cuenta un posible papel de las instituciones políticas. El Capítulo 2 de la tesis examina la relación entre las rentas del petróleo y el gas y diferentes indicadores de educación. El Capítulo 3 analiza los efectos de las rentas de los recursos naturales tanto en la cantidad como en la calidad del capital humano. Finalmente, el Capítulo 4 estudia cómo los diferentes tipos de shocks de precios de productos básicos afectan la desigualdad, y los canales a través de los cuales
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Alves, Andreia Pinho. "Prevenção, preparação e mitigação do risco de desastres : a experiência da Oikos em El Salvador." Master's thesis, Instituto Superior de Economia e Gestão, 2011. http://hdl.handle.net/10400.5/4468.

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Mestrado em Desenvolvimento e Cooperação Internacional<br>Nas últimas décadas tem-se verificado um aumento considerável na frequência e intensidade de desastres naturais. A preocupação daí consequente reflectiu-se na intensificação, desde os anos 70, de reflexões académicas e publicações, resultantes de encontros e conferências, de âmbito nacional e internacional - como as conferências mundiais sobre prevenção de desastres. Nos anos 90, decretada a Década Internacional para a Prevenção de Desastres, deu-se uma transição de paradigma em relação aos desastres naturais: de uma cultura de reacção
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Belem, Daouda. "Three essays in macroeconomics and natural resources." Doctoral thesis, Université Laval, 2020. http://hdl.handle.net/20.500.11794/66304.

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Les ressources naturelles sont d’une grande importance pour l’activité économique. Malgré le lien étroit qui existe entre les flux de ressources naturelles et le niveau de l’activité économique, l’attention accordée aux ressources naturelles dans la modélisation et l’analyse macroéconomique reste minime. Dans la majorité des cas, les ressources sont ignorées, ou lorsqu’elles sont prises en compte, les modèles aboutissent à des conclusions dissociant l’activité économique et les flux de ressource. Cette thèse propose un cadre permettant d’incorporer les ressources non renouvelables dans des mod
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Costante, Delaney. "Endangered Species Act: Quantifying Threats Impacting Listing." W&M ScholarWorks, 2021. https://scholarworks.wm.edu/etd/1627047881.

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With species increasingly becoming imperiled due to anthropogenic activities, conservation practitioners are tasked with determining conservation priorities in order to make the best use of limited resources. The United States’ Endangered Species Act (ESA) has two listing statuses into which imperiled species are placed to receive protections: Threatened or Endangered. In the first chapter, our objective was to identify differences between Threatened and Endangered species beyond what is outlined in their ESA definitions. To our knowledge, this is the first study to compare listing status for
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20

Kuusela, Olli-Pekka. "Three Essays in Natural Resource and Environmental Economics." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/50508.

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This dissertation analyses the impact of political and macroeconomic uncertainties on environmental outcomes and design of policy instruments.  The first essay examines how the rate of agricultural land expansion in tropical countries depends on the nature and persistence of new political regimes.  We use a novel panel data method that extends previous studies.  We find that both new autocratic and democratic regimes have accelerated the expansion of agricultural land, thus yielding support to some of the findings in the earlier literature.  Interesting differences emerge between regions, with
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21

Brady, Michael Patrick. "Three essays on decision-making in natural resource economics." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1190065935.

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22

Ohler, Adrienne Marie. "Three essays on natural resource allocation and public policy." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Dissertations/Summer2009/a_ohler_072109.pdf.

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23

Stephane, Victor. "Three essays on the economic impact of natural disasters." Thesis, Université Clermont Auvergne‎ (2017-2020), 2018. http://www.theses.fr/2018CLFAD004.

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Les désastres naturels ont des conséquences particulièrement dévastatrices dans les pays en développement où les individus sont hautement vulnérables et les institutions inefficaces. Néanmoins, leurs impacts sur le bien être des ménages et le rôle des autorités publiques restent encore mal compris. En outre, alors que la plupart des études se focalisent sur le risque climatique, les désastres géologiques, et les éruptions volcaniques en particulier, restent peu étudiés. Pourtant, même si elles représentent une fraction marginale des désastres naturels au niveau mondial, les éruptions volcaniqu
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Castillo, Rodríguez Jesica Tamara. "INTEGRATED FLOOD RISK MANAGEMENT: TOWARDS A RISK-INFORMED DECISION MAKING INCORPORATING NATURAL AND HUMAN-INDUCED HAZARDS." Doctoral thesis, Universitat Politècnica de València, 2018. http://hdl.handle.net/10251/82305.

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Flood risk reduction is a global challenge. Society demands higher safety and security levels, including those actions related to flood defence infrastructure protection against natural hazards and manmade threats. Dams and levees, among other flood defence infrastructures, are critical hydraulic infrastructures, aiming at reducing the likelihood that people and property will get flooded, but whose failure would result in consequences for the community downstream, including not only economic damages but also loss of life. There is always a probability associated with infrastructure failure,
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Chapple, Clive. "Three essays on the management of nonrenewable resources." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ34538.pdf.

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Armstrong, Glen W. "Three papers on the natural disturbance model of forest management." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ46801.pdf.

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Missios, Paul C. "Three essays on environmental and natural resource management and policy." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0017/NQ56248.pdf.

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Avila, Luciele Oliveira de. "Vulnerabilidade das áreas sob ameaça de desastres naturais na cidade de Santa Maria/RS." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/134683.

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A presente tese aborda a temática da vulnerabilidade da população frente às situações de ameaça e risco. A pesquisa realizou-se junto ao perímetro urbano da cidade de Santa Maria na região central do Rio Grande do Sul. A vulnerabilidade foi avaliada com relação aos fenômenos desencadeados pelas dinâmicas fluvial e de encosta, mais especificamente, movimentos de massa, inundações e erosão de margens. O objetivo principal do trabalho consiste na análise de variáveis determinantes para os graus de vulnerabilidade da população que reside em áreas sob ameaça de desastres naturais. A metodologia res
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Daigneault, Adam J. "Fire, carbon, timber, and trees three essays in natural resource economics /." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1155657159.

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Zhu, Lijia. "Example-based natural three-dimensional expression generation for virtual human faces." Thesis, University of Ottawa (Canada), 2006. http://hdl.handle.net/10393/27435.

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This thesis proposes a methodology which produces natural facial expressions for 3D human face models by making use of a databank. Firstly, guided by the specified feature point motions, an approach is introduced for generating facial expressions by blending the examples in an expression databank. The optimized blending weights are obtained implicitly by Genetic Algorithms (GA). Secondly, a consistent parameterization technique is shown to model the desired structured human face by processing the raw laser-scanned face data. Based on this technique, we construct a facial motion databank consis
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Hatton, MacDonald Darla. "Three papers in natural resource valuation, accounting for cross-cultural contexts." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ34775.pdf.

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Daigneault, Adam Joesph. "Fire, carbon, timber, and trees: three essays in natural resource economics." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1155657159.

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Chen, Yong. "Three Essays On The Interactions Between Regional Development And Natural Amenities." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1249009582.

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Wang, Tzyy-Ming. "Secondary stability and three dimensional natural convection in a shallow cavity /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487683756124784.

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Tallant, Meredith L. Molnar Joseph J. "Internet access, practice adoption, and conservation program participation in three Alabama watersheds." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Fall/Theses/TALLANT_MEREDITH_1.pdf.

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Bauknight, Dwayne. "Three Essays Analyzing the Pricing of a Community Supported Agriculture System." Thesis, West Virginia University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10110210.

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<p> The current landscape of small farms is approaching a major shift as more and more small farms are poised to come onto open marketplace around urban areas. A different farming business model called Community Supported Agriculture (CSA) has been utilized as new way for farmers to potentially earn above average revenue. However, small farmers still feel dissatisfied with their overall farm income, but when implementing the CSA business model the producers do feel that the CSA enhances their overall income satisfaction. Three essays were developed to examine this predicament. The first essay
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Koundouri, Phoebe. "Three approaches to measuring natural resource scarcity : theory and application to groundwater." Thesis, University of Cambridge, 2000. https://www.repository.cam.ac.uk/handle/1810/226658.

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Summary Efficient pricing of a resource incorporates both marginal cost of extraction and scarcity rents. Since groundwater resources exhibit natural supply constraints, scarcity rents must be imposed on current users. Given the difficulty of establishing clear groundwater ownership rights, scarcity value frequently goes unrecognized and is difficult to estimate. This results in inefficient pricing and misallocation of the resource. This thesis builds on three different methods to develop appropriate theoretical and empirical models relevant for indirect estimation of these shadow scarcity ren
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Salagae, Isaac Mahijoko. "Natural balancing of three-phase 2-cell and 3-cell multicell converters." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/3981.

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Thesis (PhD (Electrical and Electronic Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: The multicell inverter, being a widely used multilevel converter, has received much attention in recent years due to problems associated with cell capacitor voltage. In this dissertation we study the balancing problem with a focus on steady-state unbalance. This is achieved by systematic and mathematically rigorous study of the natural balancing mechanisms of the three-phase 2-cell and 3-cell multicell converter, undertaken by using dynamic modelling of the multicell converter, Ben
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Rahman, Haseeb Ahmad. "Accurate measurement of three-dimensional natural knee kinematics using single-plane fluoroscopy." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0002640.

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Ananthu, Ottakuttiyankel Saji. "Small Scale Biogas Production by using Food Waste- Examples from three Restaurants." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-39290.

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Global warming is the one of the most dangerous threats that the entire world is facing today. The emission of greenhouse gases is increasing the impact of global warming. In such a situation, reduction of GHG emissions and finding an alternative source of energy is more and more important. The production of biogas from food wastes is considered as a suitable way for the reduction of GHGs emission. The production of this type of renewable energy is very popular in Asian countries, especially in countries like India and China. Biogas production never creates any harmful effects to the environme
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Chen, Mo. "Natural products and glial cell therapy for repairing the nervous system." Thesis, Griffith University, 2019. http://hdl.handle.net/10072/389731.

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The problem: In Australia, over 12,000 people live with a spinal cord injury (SCI) and at least one new case occurs every day. Currently, there is no effective treatment for SCI. Transplantation of olfactory ensheathing cells (OECs; the glial cells of the primary olfactory nervous system) is a promising therapy, in particular autologous transplantation. OECs exhibit unique properties which stimulate neuronal growth and axonal extension, including structural and neurotrophic/guidance support. OECs also function as immune cells and remove (phagocytose) cell debris from the injury site. Furthermo
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Shockley, Darla Magdalene. "Email Thread Summarization with Conditional Random Fields." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1268159269.

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Bradley, Joseph Matthew. "Natural convection cooling of a three-by-three array of leadless chip carrier packages in a dielectric liquid." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA282298.

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Thesis (M.S. in Mechanical Engineering and Mechanical Engineer) Naval Postgraduate School, March 1994.<br>Thesis advisor(s): Yogendra Joshi. "March 1994." Includes bibliographical references. Also available online.
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Beech, Robin Nicholas. "Insertion-deletion variation in the DNA of three natural populations of Drosophila melanogaster." Thesis, University of Edinburgh, 1987. http://hdl.handle.net/1842/10772.

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Jacobs, Laura Elizabeth. "Photochemical Transformation of Three Polycyclic Aromatic Hydrocarbons, Ibuprofen, and Caffeine in Natural Waters." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1213299624.

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Orr, Olivia B. "The characterization, isolation, and fractionation of natural organic matter from three surface waters." Connect to this title online, 2009. http://etd.lib.clemson.edu/documents/1252424810/.

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Horna, Munoz Daniel Vicente. "Investigation of floodwave propagation over natural bathymetry using a three-dimensional numerical model." Diss., University of Iowa, 2017. https://ir.uiowa.edu/etd/5948.

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The current standard of simulating flood flow in natural river reaches is based on solving the 1-D or 2-D St. Venant equations or using hybrid 1-D/2-D models based on the same equations. These models are not always able to accurately predict floodwave propagation, especially around and downstream of regions where 3-D effects become important, or at times when the main assumptions associated with these models are violated (e.g. flow becomes pressurized due to presence of a hydraulic structure like a bridge or a culvert). A 3-D modeling approach, though computationally much more expensive, is no
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Neves, Cristina Cuiabália Rodrigues Pimentel. "Vulnerabilidade da paisagem pantaneira: estudo de caso da Reserva Particular do Patrimônio Natural Sesc Pantanal e entorno." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/106/106132/tde-12022016-101109/.

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Os impactos negativos das atividades humanas no ambiente vêm historicamente acelerando a transformação e a degradação das paisagens no mundo. Atualmente, a questão socioambiental vem sendo colocada em pauta diante deste cenário, fazendo com que a implantação de reservas naturais protegidas ganhe importância, pois constituem um dos pilares da proteção da biodiversidade, contribuindo sobremaneira na manutenção dos serviços ecossistêmicos gerados pelos processos naturais. Mesmo com os avanços e benefícios desta estratégia de conservação in situ, há desafios a serem superados. Em linhas gerais, as
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Taillard, Jerome Philippe Alain. "Three Essays in Corporate Finance." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1267652386.

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Van, Rijsingen Elenora. "Subduction interface roughness and megathrust earthquakes : Insights from natural data and analogue models." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTG033/document.

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Non renseigné<br>Most mega-earthquakes (i.e. earthquakes with Mw ≥ 8.5) occur along subduction mega-thrusts, the interfaces between the subducting - and the overriding plates in convergent margins. These events may have catastrophic impact on human societies due to their destructive potential. For this reason being able to predict the timing and size of these earthquakes became one goal of the international scientific community. The subduction seismic cycle is influenced by many different parameters. The interplay between these parameters governing the frequency and size of megathrust earthqua
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