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Rozprawy doktorskie na temat „Timber degradation”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 20 lutego 2023

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1

Martin, W. "Recovery of impregnated gold from waste mine timber through biological degradation." Thesis, Cape Technikon, 2000. http://hdl.handle.net/20.500.11838/2156.

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Thesis (MTech (Chemical Engineering))--Cape Technikon, 2000.<br>The large quantities of wood chips produced at mines from damaged underground timber contain gold that cannot be completely recovered by cyanidation. A fungus that can degrade a portion of the wood matrix will allow the gold that was previously locked up, to come into contact with the cyanide solution during beneficiation, thereby improving recoveries. The fungus Phanerochaete chrysosporium produces enzymes that use the organic compounds found in lignin as substrate. Consequently, the fungus is able to selectively break down

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2

McGeachie, M. T., University of Western Sydney, College of Law and Business, and of Construction Property and Planning School. "Characterisation of the Sydney region in relation to corrosion, timber decay risk factors and the corrosion of nails in timber in covered conditions." THESIS_CLAB_CPP_McGeachie_M.xml, 2001. http://handle.uws.edu.au:8081/1959.7/491.

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The aim of the study was to characterise the environment in the Sydney region in respect of atmospheric corrosivity, timber decay risk factors and the corrosion of nails in timber in covered conditions. The study reviewed contemporary research in this field, particularly in Australia, developing an understanding of the durability failure mechanisms for timber and nails in timber. The study looked at the effects of climatic aspects, pollutants, corrosion on timber decay risk factors. The study found that the levels of risk in terms of timber degradation, corrosion and nail corrosion were greate

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3

Jantan, Mohd Dahlan. "Chemical preservation of some refractory timber species of Malaysia." Thesis, University of Portsmouth, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310381.

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The treatability of six Malaysian timbers namely Red Balau (Shorea guiso), Kapur (Dryobafanops aromatica), Kasai (Pometia pinnata), Kulim (Scorodocarpus borneensis), Kempas (Koompassia malaccensis) and Keruing (Dipterocarpus grandiflorus) using the applied pressure processes (oscillating pressure, conventional Bethell and a modified Bethell process) was investigated. Treatments were carried out with a commercial water-borne copper-chromearsenic (CCA) preservative, known as Celcure-AP. The conventional Bethell process was the most effective method of wood treatment followed by the modified Beth

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4

Christin, Jérôme. "Système de fondation sur pieux bois : une technique millénaire pour demain." Thesis, Paris Est, 2013. http://www.theses.fr/2013PEST1105/document.

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La France possède un patrimoine très riche d'ouvrages d'art et de bâtiments fondés sur des pieux en bois. Les ponts construits sur la Loire, sur la Seine, le château de Chambord ou encore le Grand Palais à Paris en sont quelques exemples. Cependant, malgré un parc français important d'ouvrages bâtis sur des pieux en bois, le retour d'expérience sur la portance résiduelle et l'état de dégradation de leurs fondations est faible et non capitalisé. Les principaux objectifs de ce travail, qui s'intègre dans le projet Pieux Bois, sont d'une part, de définir une méthodologie d'analyse des fondations

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5

Simson, Scott Andrew. "Development of a model for railway track maintenance planning." Thesis, Queensland University of Technology, 1999. https://eprints.qut.edu.au/36116/1/36116_Simson_1999.pdf.

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Track maintenance represents over 20 percent of Australian railway operating costs. Thus there is considerable incentive for rail corporations to reduce their maintenance costs. There is considerable research directed at improving track structures and maintenance techniques to reduce the track maintenance expenditure. However, there is little work on the planning of track maintenance that can be applied to Australian railway operations. This research reviews maintenance planning and finds that models currently available are empirical models reliant mainly on historical track condition data fr

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6

Lu, Jin 1959. "Degradation processes and related reliability models." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39952.

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Reliability characteristics of new devices are usually demonstrated by life testing. When lifetime data are sparse, as is often the case with highly reliable devices, expensive devices, and devices for which accelerated life testing is not feasible, reliability models that are based on a combination of degradation and lifetime data represent an important practical approach. This thesis presents reliability models based on the combination of degradation and lifetime data or degradation data alone, with and without the presence of covariates. Statistical inference methods associated with the mod

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7

Addai, Obeng A. "Regulated Feedback Networks with Degradation." Youngstown State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1444046732.

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8

Daheur, Jawad. "Le Parc à bois de l'Allemagne : course aux ressources et hégémonie commerciale dans les bassins de la Vistule et de la Warta (1840-1914)." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAG041.

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Cette étude traite des stratégies allemandes pour prendre le contrôle des ressources en bois d’oeuvre dans l’espace baltique entre 1840 et 1914. Centré sur le commerce dans les bassins de la Vistule et de la Warta, elle montre comment la puissance allemande montante y est parvenue à sécuriser un accès bon marché et stable aux ressources ligneuses. Les firmes établirent leur domination commerciale en développant des technologies de transport et en renforçant leurs capacités financières et organisationnelles, tout cela en tirant profit des faiblesses économiques et politiques locales. En analysa

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9

Watson, William H. "DNA Degradation as an Indicator of Post-Mortem Interval." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc30523/.

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The question of post-mortem interval (PMI) or time since death is often the most sought after piece of information associated with a medical death investigation. Based on the observation that DNA degradation disproportionately affects the analysis of larger genetic loci, it was proposed that DNA degradation, as a result of autolysis or putrefaction, could prove suitable as a potential rate-of-change indicator of PMI. Nine randomly amplified polymorphic DNA (RAPD) analysis primers and three sets of directed amplification primers were evaluated to determine their suitability for use in assessi

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10

Olsen, Peter A. "Shear Modulus Degradation of Liquefying Sand: Quantification and Modeling." BYU ScholarsArchive, 2007. https://scholarsarchive.byu.edu/etd/1214.

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A major concern for geotechnical engineers is the ability to predict how a soil will react to large ground motions produced by earthquakes. Of all the different types of soil, liquefiable soils present some of the greatest challenges. The ability to quantify the degradation of a soil's shear modulus as it undergoes liquefaction would help engineers design more reliably and economically. This thesis uses ground motions recorded by an array of downhole accelerometers on Port Island, Japan, during the 1995 Kobe Earthquake, to quantify the shear modulus of sand as it liquefies. It has been shown t

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11

Williams, John Burgess. "Prediction of Post Mortem Interval from Degradation of Endogenous Nucleotides in Human Subjects." Thesis, University of North Texas, 1993. https://digital.library.unt.edu/ark:/67531/metadc277773/.

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High Performance Liguid Chromatography was used to measure degradation of nucleotides in human cadavers for the purpose of prediction of post mortem interval. Endogenous nucleotides were extracted from integumentary tissue of six(6) human cadavers using six percent(6%) tricholoacetic acid. Linear regression statistical techniques were used to determine linearity of degradation of various nucleotide pools.

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12

Shahabi, Sagedeh Sadat. "Non-invasive Monitoring of Degradation of Poly (lactide-co-glycolide) Hollow Fiber Channel for Recovery of Spinal Cord Injury Using Magnetic Resonance Imaging." Thesis, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23566.

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Spinal cord injury (SCI) leads to axonal damage and limits the ability of the brain to communicate with the rest of the body. Several bioengineered approaches have been developed for the recovery of SCI. Among these techniques, degradable guidance tubes have shown promising results. However, design of nerve guide tubes requires several design considerations and has been a significant challenge. To assess the efficacy of a prototypical implanted nerve guide tubes, it is essential to perform continuous monitoring. In this respect, magnetic resonance imaging (MRI) is one of the most reliable ima

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13

Humbert, Lorraine L. "A Preliminary Study for Estimating Postmortem Interval of Fabric Degradation in Central Florida." Honors in the Major Thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/1599.

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Forensic anthropologists rely on forensic evidence to estimate the postmortem interval of a decedent. This may include the study of the degree of deterioration of the human body, the life stage of insects, and the degradation of associated material evidence. Material evidence comes in many forms, and certain taphonomic processes will affect the material and must be considered when making inferences about a PMI. These include variables such as the characteristics of the soil, microorganisms, and the presence of a decaying organic material. Previous research has undertaken studies in how fabric

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14

Lundbäck, Marie. "Longterm performance of polyolefins in different environments including chlorinated water: antioxidant consumption and migration and polymer degradation." Doctoral thesis, KTH, Fiber- och polymerteknik, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-238.

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The long-term performance of stabilized polyolefins in different environments was studied with focus on antioxidant consumption and migration. Plaques of linear polyethylene (LPE) and branched polyethylene (BPE) were stabilized with Santonox® R (4,4'-Thiobis(6-tert-butyl-3-methylphenol)), Irganox® 1081 (2,2’-Thiobis(4-methyl-6-tertbutylphenol)), or Lowinox® 22M46 (2,2’-Methylenebis(6-tert-butyl-4-methylphenol)). The samples were aged in water and nitrogen at 75, 90 and 95°C. Antioxidant concentration profiles were obtained by oxidation induction time (OIT) measurements using differential scann

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15

Deng, Yingjun. "Degradation modeling based on a time-dependent Ornstein-Uhlenbeck process and prognosis of system failures." Thesis, Troyes, 2015. http://www.theses.fr/2015TROY0004/document.

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Cette thèse est consacrée à la description, la prédiction et la prévention des défaillances de systèmes. Elle se compose de quatre parties relatives à la modélisation stochastique de dégradation, au pronostic de défaillance du système, à l'estimation du niveau de défaillance et à l'optimisation de maintenance.Le processus d'Ornstein-Uhlenbeck (OU) dépendant du temps est introduit dans un objectif de modélisation des dégradations. Sur la base de ce processus, le premier instant de passage d’un niveau de défaillance prédéfini est considéré comme l’instant de défaillance du système considéré. Dif

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16

Wu, Xinying. "Reliability Assessment of a Continuous-state Fuel Cell Stack System with Multiple Degrading Components." Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1556794664723115.

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17

Gebrehiwot, Worku Zewdie. "Climate, land use and vegetation trends." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-209668.

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Land use / land cover (LULC) change assessment is getting more consideration by global environmental change studies as land use change is exposing dryland environments for transitions and higher rates of resource depletion. The semiarid regions of northwestern Ethiopia are not different as land use transition is the major problem of the region. However, there is no satisfactory study to quantify the change process of the region up to now. Hence, spatiotemporal change analysis is vital for understanding and identification of major threats and solicit solutions for sustainable management of the

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18

Smith, Austin Gregory. "Characterization and Quantification of Early Stages for Organic Coatings Applied on AA2024/AA7075 by Correlating Frequency Domain Approach in Real Time." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1399125698.

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19

Alling, Vanja. "Terrestrial organic carbon dynamics in Arctic coastal areas : budgets and multiple stable isotope approaches." Doctoral thesis, Stockholms universitet, Institutionen för tillämpad miljövetenskap (ITM), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-43455.

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Arctic rivers transport 31-42 Tg organic carbon (OC) each year to the Arctic Ocean, which is equal to 10% of the global riverine OC discharge. Since the Arctic Ocean only holds approximately 1% of the global ocean volume, the influence of terrestrially derived organic carbon (OCter) in the Arctic Ocean is relatively high. Despite the global importance of this region the behavior of the, by far largest fraction of the OCter, the dissolved organic carbon (DOC) in Arctic and sub-arctic estuaries is still a matter of debate. This thesis describes data originating from field cruises in Arctic and s

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20

Arantes, Arielle Elias. "Caracterização biofísica e potencial à intensificação sustentável da pecuária brasileira em pastagens." Universidade Federal de Goiás, 2017. http://repositorio.bc.ufg.br/tede/handle/tede/8075.

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Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2017-12-27T10:27:35Z No. of bitstreams: 2 Tese - Arielle Elias Arantes - 2017.pdf: 12603465 bytes, checksum: d64f9bccc8dcafceb1f000629bf7f031 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-12-27T10:28:07Z (GMT) No. of bitstreams: 2 Tese - Arielle Elias Arantes - 2017.pdf: 12603465 bytes, checksum: d64f9bccc8dcafceb1f000629bf7f031 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made available in DS

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21

Vernaez, Oscar. "Evaluation of an oil-based self-degradable gel for oil production applications." Thesis, Pau, 2015. http://www.theses.fr/2015PAUU3020/document.

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Dans cette thèse, une solution de caoutchouc de styrène-butadiène (SBR) réticulé avec du peroxyde organique, a été transformé en un gel autodégradable par l’ajout d’hydropéroxyde comme agent de dégradation. La formulation a été caractérisée en rhéologie dynamique. Les spectres de temps de relaxation ont été calculés à partir des modules dynamiques de cisaillement, par une nouvelle méthode développée dans ces travaux présentée avec une revue complète de méthodes pour le calcul des spectres de relaxation à partir de données de rhéométrie de cisaillement. Des expériences in-situ et ex-situ ont ét

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22

Jia, Ning. "Conception conjointe optimisée de lois de contrôle et d'ordonnancement." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2009. http://tel.archives-ouvertes.fr/tel-00369354.

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Le cadre de ce travail est l'étude coordonnée de lois de contrôle et d'ordonnancement. Le premier objectif est de proposer et évaluer une approche de contrôle de la dégradation de la Qualité de Contrôle (QdC) par rejet sélectif d'instances de tâches ou de messages selon le<br />modèle (m,k)-firm. Plus particulièrement, nous avons étudié l'impact de distribution de rejets sur la QdC d'une boucle de contrôle et, sur la base des résultats obtenus, nous avons spécifié une méthode de co-conception permettant de déterminer les paramètres (gain) optimaux de la loi de contrôle et les paramètres de la

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23

Hasan, Ali Fadhil. "Évaluation de la dégradation des forêts primaires par télédétection dans un espace de front pionnier consolidé d’Amazonie orientale (Paragominas)." Thesis, Le Mans, 2019. http://www.theses.fr/2019LEMA3002/document.

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La dégradation de la forêt est un changement de sa structure et de la composition floristique et faunistique, ce qui conduit à une perte de biodiversité, de production de biens et de services et à un accroissement de la vulnérabilité aux aléas climatiques et aux incendies. Elle concerne de vastes espaces en zone tropicale particulièrement dans les régions de fronts pionniers plus ou moins consolidés où la forêt primaire est soumise à l’extraction de bois, aux incendies et à la fragmentation. Pour évaluer son ampleur et son intensité, il est nécessaire de recourir à la télédétection. Mais les m

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Krause, Jakob. "Kontextsensitive Prognoseverfahren für das Abnutzungsverhalten von technischen Systemen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-130908.

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Technische Systeme nutzen sich ab. Dadurch bedingt kommt es zu Ausfällen. Um die Funktionstüchtigkeit von abgenutzten technischen Systemen wiederherzustellen, werden Instandsetzungsmaßnahmen durchgeführt. Da die Folgen eines unerwartet eintretenden Ausfalls drastisch sein können, ist es sinnvoll, das Abnutzungsverhalten eines technischen Systems vorherzusagen und so den Zeitpunkt von Instandsetzungsmaßnahmen zielgerichtet zu planen. Die Erstellung von Abnutzungsprognosen wird dadurch erschwert, dass sich technische Systeme oft variabel, in Abhängigkeit von auf sie einwirkenden Beanspruchungen,

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Latappy, Hubert. "Étude des COV issus de la dégradation thermique et oxydative des matériaux polymères." Phd thesis, Université Paris Sud - Paris XI, 2014. http://tel.archives-ouvertes.fr/tel-01059771.

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Les matériaux polymères sont aujourd'hui très présents dans notre environnement et deviennent irremplaçables pour de nombreuses applications : emballage, textile, mobilier,... La connaissance du cycle de vie de ces matériaux, de la production à leur destruction, devient importante pour nos sociétés. Par exemple ces matériaux peuvent émettre des Composés Organiques Volatils qui sont souvent toxiques et leur impact sur le milieu doit être évalué. L'objectif de ce travail de thèse a été de développer une méthode au laboratoire pour identifier et quantifier ces émissions. La difficulté provient de

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Santini, Thomas. "Contribution à l'étude de la fiabilité des MOSFETs en carbure de silicium." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI021/document.

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Ces dernières années ont vu apparaître sur le marché les premiers transistors de puissance de type MOSFET en carbure de silicium. Ce type de composant est particulièrement adapté à la réalisation d’équipement électrique à haut rendement et capable de fonctionner à haute température. Néanmoins, la question de la fiabilité doit être posée avant de pouvoir envisager la mise en œuvre de ces composants dans des applications aéronautiques ou spatiales. Les mécanismes de défaillance liés à l’oxyde de grille ont pendant longtemps retardé la mise sur le marché des transistors à grille isolée en carbure

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27

Propastin, Pavel. "Remote sensing based study on vegetation dynamics in drylands of Kazakhstan." Doctoral thesis, Stuttgart Ibidem-Verl, 2007. http://hdl.handle.net/11858/00-1735-0000-0006-B26A-A.

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Verma, Atul. "Transients in Polymer Electrolyte Membrane (PEM) Fuel Cells." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/64247.

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The need for energy efficient, clean and quiet, energy conversion devices for mobile and stationary applications has presented proton exchange membrane (PEM) fuel cells as a potential energy source. The use of PEM fuel cells for automotive and other transient applications, where there are rapid changes in load, presents a need for better understanding of transient behavior. In particular at low humidity operations; one of the factors critical to the performance and durability of fuel cell systems is water transport in various fuel cell layers, including water absorption in membrane. An essenti

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29

Al, jed Habib. "Influence de la recharge rapide sur les performances des accumulateurs lithium des véhicules électriques dans le cadre de l'utilisation postale." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0290/document.

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Cette thèse a pour objectif d’étudier l’influence de la recharge rapide sur le vieillissement des batteries lithium, et son impact sur les performances des véhicules électriques dans le cadre d’une utilisation postale. La première partie est consacrée à la modélisation de batteries lithium par un modèle à circuit électriques équivalent, dont les paramètres sont identifiables par des tests de caractérisation linéaires. La deuxième partie est dédiée à l’étude du vieillissement, et abouti sur un estimateur de vieillissement par l’exploitation des données des tests de vieillissement accélérés. Ens

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Labbé, Frédéric. "Étude de l’émergence et de la dynamique évolutive d’Armillaria ostoyae, agent pathogène du pin maritime." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0387/document.

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Dans la forêt de pin maritime (Pinus pinaster) des Landes de Gascogne (sud-ouest de France), la mortalité des pins causée par le champignon pourridié Armillaria ostoyae (Basidiomycète) a augmenté au cours des 30 dernières années. Les premiers cas de cette maladie ont été signalés quelques années après un changement majeur dans l'utilisation des terres, qui a eu lieu dans cette région suite au remplacement des landes et marais d'origine par une forêt plantée et gérée da façon intensive. Notre objectif était de comprendre les facteurs à l'origine de cette maladie émergente. Pour cela, nous avons

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McGeachie, M. T. "Characterisation of the Sydney region in relation to corrosion, timber decay risk factors and the corrosion of nails in timber in covered conditions." Thesis, 2001. http://handle.uws.edu.au:8081/1959.7/491.

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The aim of the study was to characterise the environment in the Sydney region in respect of atmospheric corrosivity, timber decay risk factors and the corrosion of nails in timber in covered conditions. The study reviewed contemporary research in this field, particularly in Australia, developing an understanding of the durability failure mechanisms for timber and nails in timber. The study looked at the effects of climatic aspects, pollutants, corrosion on timber decay risk factors. The study found that the levels of risk in terms of timber degradation, corrosion and nail corrosion were greate

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32

Mutenje, Munyaradzi Junia. "Rural livelihoods in south-eastern Zimbabwe : the impact of HIV/AIDS on the use and management of non-timber forestry products." Thesis, 2010. http://hdl.handle.net/10413/8542.

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Non-timber forest products (NTFPs) constitute an important source of livelihood for most poor rural households and communities in Zimbabwe. NTFPs also serve as a vital livelihood safety net in times of hardship. An important feature of this dependence is that almost all NTFPs are deemed to have ‘public good’ characteristics, with no exclusive property rights. Consequently, extraction is often intense and exhaustive because of lack of alternative income sources, unreliable productivity and weak enforcement of institutional arrangements governing NTFPs use. In recent years, with HIV/AIDS rampant

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Adnan, Muhammad. "Diversity and abundance of medicinal plants among different forest-use types of the Pakistani Himalaya." Doctoral thesis, 2012. http://hdl.handle.net/11858/00-1735-0000-0006-B150-C.

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"Defects and Statistical Degradation Analysis of Photovoltaic Power Plants." Master's thesis, 2016. http://hdl.handle.net/2286/R.I.40311.

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abstract: As the photovoltaic (PV) power plants age in the field, the PV modules degrade and generate visible and invisible defects. A defect and statistical degradation rate analysis of photovoltaic (PV) power plants is presented in two-part thesis. The first part of the thesis deals with the defect analysis and the second part of the thesis deals with the statistical degradation rate analysis. In the first part, a detailed analysis on the performance or financial risk related to each defect found in multiple PV power plants across various climatic regions of the USA is presented by assigning

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35

Shirvani, Zeinab. "A Holistic Analysis for Spatiotemporal Interdependencies of Deforestation, Forest Degradation and Landslide Susceptibility in NE Iran." 2019. https://tud.qucosa.de/id/qucosa%3A72054.

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Various biotic and abiotic agents are changing forests. Prolonged human activities substantially could cause not only different changes in forests but also could accelerate natural hazards in the Anthropocene. Despite several remote sensing-based research in forest changes, there is a need for a holistic study that could visualize different dimensions of anthropogenic-induced forest changes such as forest loss, forest fragmentation, and forest degradation. Besides, the effects of these changes require to be investigated in the natural hazards’ studies in forest regions. This research was accom

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Ewais, AMR. "Longevity of HDPE Geomembranes in Geoenvironmental Applications." Thesis, 2014. http://hdl.handle.net/1974/8640.

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With sufficient time, a high density polyethylene geomembrane will degrade and lose its engineering properties until ruptures signal the end of its service-life. This thesis examines the longevity of nine different geomembranes; five of them were of different thickness manufactured from the same resin. The degradation of properties and time to failure are investigated for geomembranes: in immersion tests; as a part of a landfill composite liner; and, exposed to the elements. The different thermal and stress histories associated with manufacturing geomembranes of different thickness are shown t

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Abdi, Omid. "Climate-Triggered Drought as Causes for Different Degradation Types of Natural Forests: A Multitemporal Remote Sensing Analysis in NE Iran." 2019. https://tud.qucosa.de/id/qucosa%3A72323.

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Climate-triggered forest disturbances are increasing either by drought or by other climate extremes. Droughts can change the structure and function of forests in long-term or cause large-scale disturbances such as tree mortality, forest fires and insect outbreaks in short-term. Traditional approaches such as dendroclimatological surveys could retrieve the long-term responses of forest trees to drought conditions; however, they are restricted to individual trees or local forest stands. Therefore, multitemporal satellite-based approaches are progressing for holistic assessment of climate-induced

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Kim, Myung Hee 1982. "Factors Affecting Biodefluorination of Fluorotelomer Alcohols (FTOHs): Degradative Microorganisms, Transformation Metabolites and Pathways, and Effects of Co-substrates." Thesis, 2012. http://hdl.handle.net/1969.1/148234.

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Fluorotelomer alcohols (FTOHs, F(CF2)nCH2CH2OH) are emerging contaminants in the environment. Biodegradation of 6:2 and 8:2 FTOHs has been intensively studied using soils and activated sludge. However, little is known about the bacteria responsible for biotransformation of FTOHs. This study deciphered factors affecting biodefluorination of FTOHs and their metabolites, and developed three effective FTOH-degrading consortia. Two alkane-degrading Pseudomonas strains (P. oleovorans and P. butanovora) can defluorinate 4:2, 6:2 and 8:2 FTOHs, with a higher degree of defluorination for 4:2 FTOH.

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Sepuru, Terrence Koena. "Assessing the use of multispectra remote sensing in mapping the spatio-temporal variations of soil erosion in Sekhukhune District, South Africa." Thesis, 2018. http://hdl.handle.net/10386/2406.

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Thesis (M.Sc. (Geography)) --University of Limpopo, 2018<br>Soil erosion, which is a critical component of land degradation, is one of the serious global environmental problems often threatening food security, water resources, and biodiversity. A comprehensive assessment and analysis of remote sensing applications in the spatial soil erosion mapping and monitoring over time and space is therefore, important for providing effective management and rehabilitation approaches at local, national and regional scales. The overall aim of the study was to assess the use of multispectral remote sensing s

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Krause, Jakob. "Kontextsensitive Prognoseverfahren für das Abnutzungsverhalten von technischen Systemen." Doctoral thesis, 2013. https://tud.qucosa.de/id/qucosa%3A27376.

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Technische Systeme nutzen sich ab. Dadurch bedingt kommt es zu Ausfällen. Um die Funktionstüchtigkeit von abgenutzten technischen Systemen wiederherzustellen, werden Instandsetzungsmaßnahmen durchgeführt. Da die Folgen eines unerwartet eintretenden Ausfalls drastisch sein können, ist es sinnvoll, das Abnutzungsverhalten eines technischen Systems vorherzusagen und so den Zeitpunkt von Instandsetzungsmaßnahmen zielgerichtet zu planen. Die Erstellung von Abnutzungsprognosen wird dadurch erschwert, dass sich technische Systeme oft variabel, in Abhängigkeit von auf sie einwirkenden Beanspruchungen,

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