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Dissertations / Theses on the topic 'Tracing pollution'

Author: Grafiati

Published: 8 June 2024

Last updated: 31 July 2025

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1

Miserendino, Rebecca Adler. "Tracing mercury pollution in aquatic ecosystems| Implications for public health." Thesis, The Johns Hopkins University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3571745.

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<p>This dissertation addressed questions pertaining to mercury (Hg) fate and transport in aquatic ecosystems by applying stable Hg isotopes as a tracer. Mercury poses a public health burden worldwide. In parts of the developing world, Hg-use during artisanal and small-scale gold mining (ASGM) is pointed at as the source of elevated Hg in the environment. However, Hg from other sources including soil erosion associated with land cover and land-use change (LCLUC) may also contribute to local Hg pollution. </p><p> Stable Hg isotope profiles of sediment cores, surface sediments, and soils from t

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Koch, Benedikt. "Greening or greenwashing dirty laundry? Tracing sustainability in the Tirupur textile cluster." Thesis, Linköpings universitet, Tema Miljöförändring, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129924.

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The contemporary world landscape is epitomised by a highly globalised world economy, where neo-liberal agendas push for ultimate competitiveness and much of the manufacturing and production processes have been relocated from core to semi-peripheral countries. To be able to compete in the global arena, many developing nations and newly emerging economies have sacrificed an approach to sustainable development by neglecting social and ecological aspects. A showcase of such unsustainable growth in recent years can be observed in Tirupur, South India. Tirupur’s heavy export orientation of ready-kni

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Coch, Caroline. "Pathways and Transit Time of Meltwater in the Englacial Drainage System of Rabots Glacier, Kebnekaise, Sweden." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-116256.

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Following the crash of a Norwegian Hercules aircraft on Rabots glaciär in the Kebnekaise mountain range in 2012, a field campaign was initiated in order to assess the fate of the hydrocarbon pollution in the system. It is hypothesized that soluble components of the aircraft fuel will be transported within the glacial meltwater. This thesis focuses on constraining the likely transit time and dispersion of the meltwater as a proxy for potential pollution pathways. Therefore, the hydrologic configuration of Rabots glaciär was studied during the ablation season 2013 by means of dye tracing exper

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Cui, Qing. "Tracing Copper from society to the aquatic environment : Model development and case studies in Stockholm." Licentiate thesis, Stockholm : Royal Institute of Technology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12049.

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Babey, Tristan. "Compartimentation et transfert de contaminants dans les milieux souterrains : interaction entre transport physique, réactivité chimique et activité biologique." Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S107/document.

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Classiquement le transfert des contaminants dans le milieu souterrain est modélisé par un couplage des processus de transport physiques (écoulements contrôlés par les structures géologiques poreuses) et des processus de dégradation ou d'immobilisation chimiques et biologiques. Tant sur les structures géologiques que sur la chimie et la physique, les modèles sont de plus en plus détaillés mais de plus en plus difficiles à calibrer sur des données toujours très parcellaires. Dans cette thèse, nous développons une approche alternative basée sur des modèles parcimonieux sous la forme d’un simple g

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Ghasemifard, Homa [Verfasser], Annette [Akademischer Betreuer] Menzel, Annette [Gutachter] Menzel, and Jia [Gutachter] Chen. "Tracing atmospheric carbon dioxide: pollution sources and air-mass transport influencing high Alpine areas in Central Europe / Homa Ghasemifard ; Gutachter: Annette Menzel, Jia Chen ; Betreuer: Annette Menzel." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1221719505/34.

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Chalaux, Thomas. "Impact of decontamination and recultivation of agricultural soils on sediment and radiocaesium transfers in Fukushima rivers." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASJ037.

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D'importantes quantités de radionucléides (principalement du radiocésium) se sont déposées sur les sols du nord-est du Japon après l'accident de la centrale nucléaire de Fukushima Daiichi en mars 2011. Dès fin 2013, les autorités japonaises ont entrepris un programme sans précédent de décontamination à grande échelle dans les zones cultivées et résidentielles touchées par le panache radioactif (8953 km2). L'objectif principal était de ne pas exposer les habitants à des doses radioactives supérieures à 1 mSv an-1 en plus du niveau naturel, afin de permettre un retour rapide des habitants et la

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8

Araújo, Susana Manso. "Tracking sources of fecal pollution in Berlenga Island." Master's thesis, Universidade de Aveiro, 2012. http://hdl.handle.net/10773/9740.

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Mestrado em Biologia Aplicada<br>As águas marinhas costeiras são suscetíveis a contaminação fecal, tanto por fontes pontuais, como por fontes difusas, que podem ter contribuições de fontes individuais pertencentes a animais selvagens, animais domésticos e seres humanos. Os inputs de fontes difusas no ambiente são dispersos e esporádicos, o que torna a sua deteção difícil. A distinção entre a contaminação fecal de origem humana e não-humana tem vindo a tornar-se, nos últimos anos, um objetivo global crucial, uma vez que tem impacto na saúde humana e na economia local. Uma vez que a quali

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Bothamy, Nina. "Fractionnement anthropique et naturel des isotopes stables du néodyme (Nd) dans l'environnement." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0295.

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Avec une utilisation mondiale croissante pour des applications variées (nouvelles technologies, énergies vertes, etc.), les terres rares (REEs pour ‘rare earth elements’) sont devenues des polluants émergents. Ces pollutions peuvent/pourront être d’origine industrielle (ex. rejets dans l’environnement en sortie d’usine), minière, ou causées par le stockage inapproprié de produits industriels (ex. aimants à base de néodyme (Nd) fragiles à la corrosion). Dans ce contexte, ce projet de thèse a cherché à développer un nouvel outil : l’étude du fractionnement dépendant de la masse des isotopes du N

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McKinney, Julie Michelle. "Identifying Sources of Fecal Pollution in the Appomattox River Watershed." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/9951.

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Sources of E. coli were determined from impaired waterways in the Appomattox River watershed (in the lower Piedmont and South-Central Virginia) for the development of bacterial Total Maximum Daily Loads (TMDLs). The Appomattox River watershed is primarily undeveloped with 70.8% of the land forested, 17.0% used for agriculture (mainly livestock production), and 7.7% classified as water, wetland or barren land. The remaining 4.5% is developed for residential, commercial, and industrial land uses (mainly within the city of Petersburg). Using Antibiotic Resistance Analysis, a known source libra

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Huang, Xixi. "Identification of Putative Geographic Sources of Bacterial Pollution in Lake Erie by Molecular Fingerprinting." University of Toledo / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1172507289.

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Porter, Kimberly Rae. "Determining Sources of Fecal Pollution in Washington D.C. Waterways." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/36009.

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Antibiotic resistance analysis (ARA) of Enterococci was used to determine sources of fecal contamination in three District of Columbia waterways: Rock Creek, the Anacostia River, and the Potomac River. These three waterways were identified as exceeding water quality standards set for fecal coliform levels and were designated by the District of Columbia to the Environmental Protection Agency's 303 (d) impaired waters list. A library profile of 1,806 enterococcus isolates from known sources was built based on antibiotic resistance patterns from thirty concentrations of nine antibiotics.

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Graves, Alexandria Kristen. "Determining Sources of Fecal Pollution in Water for a Rural Virginia Community." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/34409.

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This project involves developing and applying bacterial source tracking (BST) methodology to determine sources of fecal pollution in water for a rural community (Millwood, VA). Antibiotic resistance analysis (ARA) is the primary BST method for fecal source identification, followed by randomly amplified polymorphic DNA (RAPD) analysis for confirmation. Millwood consists of 66 homes, all served by individual septic systems, and a stream (Spout Run) passes through the center of the community. Spout Run drains a 5,800 ha karst topography watershed that includes large populations of livestock and w

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Bowman, Amy Marie. "Determining Sources of Fecal Pollution in the Blackwater River Watershed, Franklin County, Virginia." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/34546.

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Antibiotic resistance analysis (ARA) was used to determine sources of fecal pollution in the Blackwater River in South-central Virginia. The Department of Environmental Quality designated six segments as impaired due to high fecal coliform concentrations with non-point source (NPS) agriculture the suspected source of impairment. The Blackwater River watershed encompasses 72,000 ha of dairy, beef, and intensive production agriculture, abundant wildlife populations and many homes with onsite septic systems. A library of antibiotic resistance profiles based on 30 concentrations of 9 antibiotics

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Reeves, Alastair Ian. "Contaminant tracking through dendro-chemical analysis of tree-radii." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69688.

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The research used dendro-chemical analysis of ash tree rings and current year leaf litter to track Cd, Pb, Zn, Cu, Mn, Cr, and Sn spread and cycling from a closed garbage dump-toxic waste site. This technique allowed for determination of areal extent, contaminant levels and time period of initial contaminant contact. Only Zn, Sn, and Cu were found in elevated quantities in the xylem wood and Pb in the leaf litter. Elemental concentrations of Pb, Sn and Cd in xylem wood and leaves of ash were positively correlated. Tin was the only element to demonstrate a clear initial contact period and eleme

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Vadde, K. K. "Application of microbial source tracking techniques to characterize fecal pollution entering Taihu Lake (China)." Thesis, University of Liverpool, 2018. http://livrepository.liverpool.ac.uk/3028229/.

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AbdelZaher, Amir Mahmoud. "Microbes At A Non-Point Source Sub-Tropical Recreational Marine Beach And Their Implications On Human Health And Beach Monitoring Practices." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_dissertations/367.

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Swimming in ocean water, including beaches not impacted by known point sources of pollution, continues to pose a rising health concern. Studies which evaluate the relationship between indicator microbes, pathogens, and human health at recreational beaches are rare, especially at non-point beaches, although such studies are necessary for establishing criteria which would protect public health while minimizing economic burdens. The objective of this dissertation was to better understand the non-point source beach system, and hence determine possible directions that should be taken from a beach r

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Carratalà, Ripollès Anna. "Contaminació viral del medi ambient: persistència i traçabilitat / Environmental viral pollution: persistence and source tracking." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/111289.

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Les poblacions humanes i animals excreten una gran diversitat de virus patògens en les seves femtes i orina, de manera que l’aigua residual que generen representa un dels principals vehicles de la disseminació de patògens a les aigües superficials, subterrànies o costaneres i conseqüentment, als aliments. La contaminació del medi ambient suposa un risc greu de salut pública. S’ha estimat que en el conjunt del planeta, aproximadament 3.000 milions de persones no disposen d’aigua potable i que el 95% de l’aigua residual domèstica és abocada al medi ambient sense tractar. Aquesta tesi doctora

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Graves, Alexandria Kristen. "Identifying Sources of Fecal Pollution in Water as Function of Sampling Frequency Under Low and High Stream Flow Conditions." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/27162.

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Sources of fecal pollution were evaluated as a function of sampling frequency with stream samples from Mill Creek, Montgomery County, VA. Samples were collected monthly for one year, plus weekly for four consecutive weeks during seasonal high flows (March), and seasonal low flows (September-October), plus daily for seven consecutive days within the weekly schedules. Thirty stream samples were collected from each of two sites (60 total) in Mill Creek, and 48 isolates of E. coli per sample (total of 2,880 stream isolates) were classified by source using antibiotic resistance analysis (ARA) and

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Lamendella, Regina. "Assessment of Fecal Source Pollution in Plum Creek Watershed, Nebraska Using Bacteroidetes-Targeted PCR Assays and Phylogenetic Analysis." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1141427143.

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Lang, Cassandra C., and University of Lethbridge Faculty of Arts and Science. "Identification and metabolic characterization of host-specific enterococci for use in source-tracking faecal contamination." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2005, 2005. http://hdl.handle.net/10133/265.

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Metabolic were used to evaluate Enterococcus as an indicator of faecal pollution. Enterococci were isolated using m-Enterococcus agar and speciated using conventional biochemical tests. Forty percent of the isolates were identified and metabolically characterized by the automated Biolog system. The biochemical test scheme recognized 16 enterococcal species, while Biolog recognized nine. Both methods identified E. faecalis at the greatest frequency. Overall species frequencies varied between the two methods. Biolog was unable to identify 31% of the isolates; 7% of the isolates were unidentified

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Morgan, Jake Roberts. "Tracking the little black 'rain' clouds: an enviro-economic analysis of ambient air pollution effects on pediatric asthma." Thesis, Montana State University, 2012. http://etd.lib.montana.edu/etd/2012/morgan/MorganJ0512.pdf.

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Epidemiological studies routinely demonstrate a positive correlation between ambient air pollution and respiratory aggravation. Potential benefits from federal regulations to economic and physical health of individuals, however, are not well understood by either law makers or voters. As the EPA implements new regulations targeting SO &#8322; emissions, robust empirical analysis can frame the policy issue as one of statistical and economic analysis. The Asthma Call Back Survey extension of the Behavioral Risk Factor Surveillance System collects detailed data on symptoms, intervention method

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Dickerson, Jerold W. Jr. "Evaluation, Development and Improvement of Genotypic, Phenotypic and Chemical Microbial Source Tracking Methods and Application to Fecal Pollution at Virginia's Public Beaches." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/28723.

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The microbial source tracking (MST) methods of antibiotic resistance analysis (ARA) and fluorometry (to detect optical brighteners in detergents) were used in the summers of 2004 and 2005 to determine the origins of fecal pollution at beaches with a past history of, or the potential for, high enterococci counts and posted advisories. At Hilton and Anderson beaches, ARA and fluorometry in the summer of 2004 detected substantial human-origin pollution in locations producing consistently high counts of Enterococcus spp. Investigations by municipal officials led to the fluorometric detection and

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Coakley, Tricia L. "LOCATING HOT SPOTS OF FECAL POLLUTION IN AN URBAN WATERSHED OF CENTRAL KENTUCKY USING BACTEROIDES 16S rRNA MARKERS." UKnowledge, 2011. http://uknowledge.uky.edu/ees_etds/4.

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The field of molecular fecal source tracking in the water environment has developed rapidly since the first PCR assays for general and host-‐specific Bacteroides 16s rRNA markers were published. Numerous host-‐specific molecular markers and PCR assays have been developed, adding greater specificity, sensitivity and quantitative methods to the array of options. The public demand for readying methods for transfer to the commercial lab, so that they may be used to generate data for public utilities, citizen action groups and regulatory agencies, has fueled the development of an entire new resea

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Hussein, Khwam Reissan. "Source tracking of faecal indicator bacteria of human pathogens in bathing waters : an evaluation and development." Thesis, University of Plymouth, 2014. http://hdl.handle.net/10026.1/3011.

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Bacterial water pollution is a significant problem because it is associated with reduction in the ‘quality’ of water systems with a potential impact on human health. Faecal indicator bacteria (FIB) are usually used to monitor the quality of water, and to indicate the presence of pathogens in water bodies. However, enumeration alone does not enable identification of the precise origin of these pathogens. This study aimed to monitor the quality of bathing water and associated fresh water in and out of the ‘bathing season’ in the UK, and to evaluate the use of microbial source tracking (MST) such

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Geary, Phillip M. "On-site system effluent source tracking using geochemical and microbial tracers in a coastal catchment." View thesis, 2004. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20051223.123840/index.html.

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Warlimont, Petra. "Application of the Tracking and Analysis Framework (TAF) to Assess the Effects of Acidic Deposition on Recreational Fishing in Maine Lakes." Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/WarlimontP2002.pdf.

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Limbo, Beulah Sepo. "Insulator aging tests with HVAC and HVDC excitation using the tracking wheel tester." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/2529.

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Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2009.<br>ENGLISH ABSTRACT: Limited research results are available on the aging impacts of surface discharges for High Voltage Direct Current (HVDC) excitation on practical insulators using the Tracking Wheel Tester (TWT) methodology. This thesis gives details of an experimental investigation to compare the aging performance of insulator samples using the TWT for High Voltage Alternating Current (HVAC) and positive and negative polarity HVDC excitation. Two series of tests were performed. The first series of t

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Hartard, Cédric. "Les bactériophages ARN F-spécifiques comme indicateurs du danger viral lié à la pollution fécale des matrices hydriques et alimentaires." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0152/document.

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Les virus entériques sont à l’origine de pathologies liées au péril fécal et dans l’état actuel des connaissances, la recherche des indicateurs de pollution fécale conventionnels (i.e. Escherichia coli, entérocoques) peut s’avérer inefficace pour évaluer le danger viral. La définition d’autres indicateurs pour gérer le danger lié à la présence des virus entériques dans les matrices hydriques et alimentaires est aujourd’hui nécessaire. Parmi eux, les bactériophages ARN F-spécifiques (FRNAPH) présentent plusieurs intérêts. Ces virus d’origine entérique sont présents en quantité importante dans l

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Geary, Phillip M. "On-site system effluent source tracking using geochemical and microbial tracers in a coastal catchment." Thesis, View thesis, 2004. http://handle.uws.edu.au:8081/1959.7/566.

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The principal aims of this thesis were to examine whether there were hydraulic links between individual on-site wastewater systems in sandy soils at Salt Ash and the Tilgerry Creek estuary near Port Stephens, New South Wales, and whether the chemical and microbiological contaminants from on-site systems could reach surface and groundwaters, and possibly lead to impacts on estuarine oyster growing waters. The research outcomes are contained within the thesis and in four refereed papers presented at conferences, and which have been subsequently published, or are in press. Copies of each of these

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Rusiñol, Aràntegui Marta. "Disseminació i traçabilitat de la contaminació viral en conques fluvials = Dissemination and source tracking of viral contamination in river catchments." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/145833.

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Aquesta Tesi Doctoral ha estat pensada per avaluar, mitjançant l’estudi de virus contaminants, l’origen de la contaminació fecal i l’avast de la disseminació a l’aigua. Amb aquesta finalitat s’han utilitzat eines moleculars per a la detecció i quantificació de virus especifics humans, bovins i porcins i a més a més s’ha desenvolupat una nova eina per traçar la contaminació ovina a l’ambient. Els principals agents virals amb risc per als humans són d’origen humà però les femtes animals, amb potencials patògens zoonòtics, representen també un risc per a la salut humana. La intensificació de la p

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Zhong, Xiao. "A study of several statistical methods for classification with application to microbial source tracking." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0430104-155106/.

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Thesis (M.S.)--Worcester Polytechnic Institute.<br>Keywords: classification; k-nearest-neighbor (k-n-n); neural networks; linear discriminant analysis (LDA); support vector machines; microbial source tracking (MST); quadratic discriminant analysis (QDA); logistic regression. Includes bibliographical references (p. 59-61).

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Symonds, Erin Michelle. "Pepper Mild Mottle Virus as a Surrogate for Enteric Viruses: Implications for Assessing Water Quality." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6590.

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Less than 10% of the world’s domestic wastewater is disinfected prior to discharge into surface waters; therefore, human exposure to diverse wastewater-related pathogens results in millions of cases of illness each year. Among the enteric pathogens, viruses represent an important group of emerging pathogens and are frequently the cause of food- and water-borne outbreaks of illness. Although the World Health Organization and many government agencies mandate the use of bacterial indicators to identify poor microbial water quality, it is well known that these indicators poorly correlate with feca

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Korajkic, Asja. "Discrimination of Human and Non-Human Sources of Pollution in Gulf of Mexico Waters by Microbial Source Tracking Methods and the Investigation of the Influence of Environmental Factors on Escherichia coli Survival." Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3503.

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Water quality worldwide is assessed by enumeration of fecal indicator bacteria (FIB) (fecal coliforms, Escherichia coli, and enterococci) intended to act as surrogates for human enteric pathogens. In environmental waters, this predictive relationship is confounded by many possible sources of FIB with varying implications for human health. Many physico-chemical and biological factors influence the fate of enteric pathogens and FIB in aquatic habitats, but are poorly understood, thus limiting our understanding of the usefulness of FIB as fecal pollution indicators. These studies explored the fie

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Roca, Carceller Guillem. "Tracking environmental change in seagrass meadows: understanding indicator behaviour across space and time." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/325415.

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Nearshore marine ecosystems like seagrass meadows face a wide range of anthropogenic influences, impacting the system at different spatial and temporal scales. Managing these systems in the face of these pressures requires detailed knowledge of how seagrass habitats respond to these various threats. A plethora of useful indicators have been developed to help managers and policy makers track seagrass meadow health and status, detect environmental impacts or measure the effectiveness of management interventions. However, choosing between these indicators can often be a daunting task since they v

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Ems, Matthieu. "Emission et visualisation de particules de frein : Application sur un banc de freinage à échelle réduite intégrant des conditions d’écoulement représentatives." Electronic Thesis or Diss., Valenciennes, Université Polytechnique Hauts-de-France, 2025. https://ged.uphf.fr/nuxeo/site/esupversions/b30c690c-13f6-4cc8-a488-d7e5afdbe1e7.

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Réduire les émissions de particules, notamment les PM10, les PM2.5 et les ultrafines (<100nm) est devenu un enjeu environnemental et de santé publique. Leur dispersion dans l'environnement proche au cours du freinage à friction est liée, d'une part, aux sollicitations thermomécaniques à l'interface garniture – disque, et d'autre part, à l'encombrement sous véhicule qui va influencer leur trajectoire initiale. Cette thèse fait partie du projet BREAQ visant à réduire l'exposition aux particules fines issues du freinage ferroviaire. Les travaux présentés dans ce mémoire s'intéressent plus part

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Douar, Adnane. "Recherche de matériaux isolants pour la conception d'une nouvelle génération de connecteurs électriques haute tension : influence de la pollution sur les phénomènes de décharges partielles du contournement et de claquage." Thesis, Ecully, Ecole centrale de Lyon, 2014. http://www.theses.fr/2014ECDL0046/document.

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Dans le présent travail, nous abordons une problématique essentielle liée aux accessoires des lignes électriques et plus particulièrement au connecteur à perforation d’isolant (TTDC 45501 FA), commercialisé par la société Sicame située à Arnac-Pompadour (Corrèze). Ce produit permet d’effectuer des dérivations de courant en moyenne tension gainé HTA entre 15 et 25kV. Cependant, il devient nécessaire de concevoir une nouvelle génération de connecteurs capable de fonctionner à une tension de 52 kV en raison de la constante augmentation des besoins en électricité. En réalité, le principal souci co

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Greig, Denise J. "Health, disease, mortality and survival in wild and rehabilitated harbor seals (Phoca vitulina) in San Francisco Bay and along the central California coast." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/1885.

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Conventional methods for health assessment of wild-caught and stranded seals were used to describe the disease status of harbor seals in California. Clinical chemistry, infectious disease prevalence, immune function, and contaminant data were collected to evaluate harbor seal health with data collected from three groups of seals. Wild-caught seals of all ages were sampled at two locations: San Francisco Bay (a heavily urbanized estuary) and Tomales Bay (a less developed control site). Stranded seals entered rehabilitation from a more extensive portion of the California coast which included the

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Cheng, Yung-Hsuan, and 鄭詠瑄. "Method of Tracing and Regulations for Indoor Air Pollution Sources." Thesis, 2019. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22107NCHU5650004%22.&searchmode=basic.

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碩士<br>國立中興大學<br>通訊工程研究所<br>107<br>In recent years, outdoor air pollution is getting more and more serious, and people often close their doors and windows to block dirty air outside. But when we are in a sealed building, it does not certainly means that the indoor air quality will be better. When the indoor ventilation is insufficient, harmful substances in the air are easily to accumulated, and the indoor air quality will deteriorating. Therefore, if the window is closed for outdoor air pollution, it is possible to increase the concentration of harmful gases in the room. Therefore, we use wire

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Mu-JenChu and 朱牧人. "Precise Measurement of Cd Isotopes in Sediments for Tracing Environmental Pollution Sources." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/4465fd.

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碩士<br>國立成功大學<br>地球科學系碩博士班<br>101<br>Taiwan is a densely populated country with lots of crowded and overused land. The rapidly developing economic growths and industrialization resulted serious heavy metal pollution on agriculture land nearby the factories. Cadmium (Cd) has eight stable isotopic at a mass range from 106 to 116 amu, where a natural isotope fractionation of -0.08~0.05‰/amu was found in various terrestrial samples. Significant isotope fractionation of Cd (-0.28~0.28‰/amu) was detected only during industrial processes at very high temperature, resulting in the lighter nuclides enri

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Dick, Linda K. "Fecal Bacteroidetes host distributions and environmental source tracking." Thesis, 2004. http://hdl.handle.net/1957/29752.

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Contamination of recreational and shellfish waters with fecal pollution is a major water quality issue with associated economic impacts and human health risks. Reliable fecal source identification and rapid, quantitative analyses are essential components of risk assessment. Enteric bacteria that are endemic to specific hosts have a potential role as public health indicators of fecal pollution. Building on previous work to discriminate ruminant and human fecal contamination, we cloned class Bacteroidetes 16S rRNA genes from pig, elk, dog, cat, and seagull fecal DNAs. Unique restriction patterns

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Hung-HsiangLi and 李弘翔. "AquaView: An Aquatic-Pollution Detection and Tracking Scheme for Water-Surface Wireless Sensor Networks." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/91127821423154681622.

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碩士<br>國立成功大學<br>電腦與通信工程研究所<br>98<br>Spilled invisible pollutions, such as oil or biochemical materials, damage not only the ocean environment but also the regional economics. To prevent such damages from expanding, a wireless sensor network deployed over the ocean, referred to as Water-surface Wireless Sensor Network (WWSN) in this study, is a suitable candidate for timely monitoring of such wide range and continuous moving objects. In WWSN, this study develops an aquatic-pollution detection and tracking scheme, designated as AquaView, based on an autonomous self-localization cluster mechanism

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Chang, Jen-Kai, and 張仁愷. "The Indoor VOC Air Pollution Diffusion Modeling and Source Tracking in Wireless Sensor Network." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/48125722690005417325.

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碩士<br>國立中央大學<br>通訊工程學系<br>102<br>Owing to the rising awareness of environment protection and the trend of global warming, more and more people increase awareness of air pollution. Because most of air quality monitoring stations set up in outdoor to monitor pollution and greenhouse gases of metropolitan area, that ignore the importance of indoor air quality (IAQ). However, damage and number of deaths of indoor air pollution are more than outdoors, but sensing device rarely for a long time monitoring. In this study, we focus on volatile organic compounds (VOC) for a long time monitoring in i

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Hwang, J. "Adaptive sampling of a discrete underwater plume using an autonomous underwater vehicle." Thesis, 2021. https://eprints.utas.edu.au/45872/2/Hwang_whole_thesis_ex_pub_mat.pdf.

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Autonomous underwater vehicles (AUVs) have been increasingly applied to oceanographic missions. Despite technological advances, adaptability to environmental changes or intelligent behaviour is still at an early stage of development, especially for large survey class AUVs. This research addresses the real-world challenge of using an AUV to delineate an oil plume in sea water, in the management of an environmental spill. A review of current literature showed the most common methodology in conventional adaptive AUV missions involved gradient-following methods with point-based sensors such as f

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Rivera-Torres, Yaritza. "Isolation and identification of the fecal pollution indicators Enterococcus spp. from seagrass Thalassia testudinum at La Parguera, Puerto Rico and the use of Enterococci for microbial source tracking /." 2008. http://grad.uprm.edu/tesis/riveratorres.pdf.

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Santos, Maria Inês Laranjeiro Gouveia. "Seabirds as biomonitors of metal contamination and environmental health in the North Atlantic." Master's thesis, 2019. http://hdl.handle.net/10316/87815.

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Dissertação de Mestrado em Ecologia apresentada à Faculdade de Ciências e Tecnologia<br>A poluição química por metais é atualmente um problema nos ecossistemas marinhos e os organismos, expostos, podem acumular níveis altos de metais, provenientes de várias fontes antropogénicas. Altas concentrações induzem o stress oxidativo levando a danos fisiológicos que podem ser detetados com biomarcadores específicos. As aves marinhas são bons bioindicadores de qualidade ambiental, fornecendo informações sobre as relações tróficas e qualidade dos recursos. Os objetivos deste estudo foram avaliar a quali

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"Novel Colorimetric Sensors with Extended Lifetime for Personal Exposure Monitoring." Doctoral diss., 2019. http://hdl.handle.net/2286/R.I.55643.

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abstract: Air pollution has been linked to various health problems but how different air pollutants and exposure levels contribute to those diseases remain largely unknown. Researchers have mainly relied on data from government air monitoring stations to study the health effects of air pollution exposure. The limited information provided by sparse stations has low spatial and temporal resolution, which is not able to represent the actual exposure of individuals. A tool that can accurately monitor personal exposure provides valuable data for epidemiologists to understand the relationship betwee

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