Дисертації з теми "Environmental quantification"
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Garraghan, Peter Michael. "Holistic cloud computing environmental quantification and behavioural analysis." Thesis, University of Leeds, 2014. http://etheses.whiterose.ac.uk/7192/.
Повний текст джерелаMondaca, Fernandez Iram. "Spectroscopy Techniques for quantification of Microorganisms in Environmental Samples." Tucson, Arizona : University of Arizona, 2006. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1416%5F1%5Fm.pdf&type=application/pdf.
Повний текст джерелаSpeak, Andrew Francis. "Quantification of the environmental impacts of urban green roofs." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/quantification-of-the-environmental-impacts-of-urban-green-roofs(6dc863d5-53bd-462b-b37f-37faa9ae3db0).html.
Повний текст джерелаMondaca, Fernandez Iram. "Spectroscopy Techniques for quantification of Microorganisms in Environmental Samples." Diss., The University of Arizona, 2005. http://hdl.handle.net/10150/194103.
Повний текст джерелаMohammadi, Ghazi Reza. "Inference and uncertainty quantification for unsupervised structural monitoring problems." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/115791.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 261-272).
Health monitoring is an essential functionality for smart and sustainable infrastructures that helps improving their safety and life span. A major element of such functionality is statistical inference and decision making which aims to process the dynamic response of structures in order to localize the defects in those systems as well as quantifying the uncertainties associated with such predictions. Accomplishing this task requires dealing with special constraints, in addition to the general challenges of inference problems, which are imposed by the uniqueness and size of civil infrastructures. These constraints are mainly associated with the small size and high dimensionality of the relevant data sets, low spatial resolution of measurements, and lack of prior information about the response of structures at all possible damaged states. Additionally, the measured responses at various locations on a structure are statistically dependent due to their connectivity via the structural elements. Ignoring such dependencies may result in inaccurate predictions, usually by blurring the damage localization resolution. In this thesis work, a comprehensive investigation has been carried out on developing appropriate signal processing, inference, and uncertainty quantification techniques with applications to data driven structural health monitoring (SHM). For signal processing, we have developed a feature extraction scheme that uses nonlinear non-stationary signal decomposition techniques to capture the effect of damages on the dynamic response of structures. We have also developed a general purpose signal processing method by combining the sparsity based regularization with the singularity expansion method. This method can provide a sparse representation of signals in complex-frequency plane and hence, more robust system identification schemes. For uncertainty quantification and decision making, we have developed three different learning algorithms which are capable of characterizing the statistical dependencies of the relevant random variables in novelty detection inference problems under various constraints related to the quality, size, and dimensionality of data sets. In doing so, we have mainly used the statistical graphical models and Markov random fields, optimization methods, kernel two sample tests, and kernel dependence analysis. The developed methods may be applied to a wide range of problems such as SHM, medical diagnostic, network security, and event detection. We have experimentally evaluated these techniques by applying them to SHM application problems for damage localization in various laboratory prototypes as well as a full scale structure.
by Reza Mohammadi Ghazi.
Ph. D. in Structures and Materials
Fugate, David C. "Quantification of Tidal Creek Network Patterns using Fractal Methods." W&M ScholarWorks, 1996. https://scholarworks.wm.edu/etd/1539617716.
Повний текст джерелаNkongolo, Nsalambi Vakanda. "Quantification of greenhouse gas fluxes from soil in agricultural fields." Thesis, Nelson Mandela Metropolitan University, 2010. http://hdl.handle.net/10948/1474.
Повний текст джерелаGalloway, P. W. "Performance quantification of tidal turbines subjected to dynamic loading." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/361524/.
Повний текст джерелаHe, Yang. "Quantification of Carbon Nanotubes in the Environmental Matrices by Using a Microwave Induced Heating Method." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin154392139689757.
Повний текст джерелаde, Luis Jorge. "A Process for the Quantification of Aircraft Noise and Emissions Interdependencies." Diss., Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24618.
Повний текст джерелаGoldstein, Lucas. "Three-dimensional visualization and quantification of residual non-aqueous phase liquids using x-ray computed tomography." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=81334.
Повний текст джерелаIn this study, experiments were conducted to demonstrate the capabilities and limitations of X-ray Computed Tomography (CT) to non-destructively quantify contaminants in soil columns.
Verley, Simon. "Environmental quantification and Hα characterisation of the most isolated galaxies in the local universe". Observatoire de Paris (1667-....), 2005. https://hal.science/tel-02071413.
Повний текст джерелаThe role of environment on galaxy evolution is still not fully understood. In order to quantify and set limits on the role of nurture one must identify and study an isolated sample of galaxies. We processed 950 galaxies from the Catalogue of Isolated Galaxies and evaluated their isolation. We defined, compared and discussed various criteria to quantify the degree of isolation for these galaxies : e. G. Local surface density computations, estimation of the external tidal force affecting each isolated galaxy. Additionally, we sought for the redshifts of the primary and companion galaxies to access the radial dimension and have accurate three dimensional picture of the surroundings. Finally, we applied our pipeline to triplets, compact groups and clusters and interpret the isolated galaxy population in light of these control samples. The star formation is known to be affected by the local environment of the galaxies, but the star formation rate also highly depends on the intrinsic interstellar medium features. To address this issue, we observed and gathered photometric data for 200 isolated galaxies. We subsequently studied the H alpha morphological aspect of the 45 biggest and less inclined galaxies. Using Fast Fourier Transform techniques, we focus on the modes of the spiral arms, quantify the strength of the bars, and we give the torques between the newly formed stars and the bulk of the optical matter. We interpret the various bar and H alpha morphologies observed in terms of the secular evolution experienced by galaxies isolation. The observed frequency of particular patterns bring constraints on the lifetime of bars and their fading time-scales
Özbal, Can Cemil 1971. "Quantification of benzo[a]pyrene-diol-epoxide adducts by laser-induced fluorescence spectroscopy." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9513.
Повний текст джерелаIncludes bibliographical references.
Quantification of adducts in human samples is a challenging task in analytical chemistry. Humans are typically exposed to low levels of a wide range of different carcinogens. As a result, adduct quantification requires both a highly sensitive and a highly selective method. This project has focused on the development of new laser-induced fluorescence (LIF) based methods for the quantification of adducts in human samples. Two new instruments were built for LIF analysis. A cryogenic LIF instrument using a pulsed tunable dye laser as the excitation source was developed to obtain low temperature fluorescence emission spectra. A second instrument using a LIF detector interfaced to a HPLC separation system was developed to provide a higher level of selectivity than the cryogenic LIF system. The LIF instruments were used to quantify adducts of benzo[a]pyrene-7,8-diol-9,10- epoxide (BPDE) in human lung tissue and human bronchial epithelial cell histones and DNA and in human serum albumin. The presence of BPDE adducts in human lung tissue and human bronchial epithelial cell histones and DNA was proven by cryogenic fluorescence line-narrowing (FLN) spectroscopy. (-)-anti-BPDE-serum albumin adducts were quantified by HPLC-LIF in plasma obtained from 63 healthy volunteers. The method was shown to have a coefficient of variability of 22% and a detection limit of 20 attomoles of BPDE adduct. Adducts were detected in 60 of 63 samples (95%) at an average level of 0.22 femtomoles of adduct per mg of albumin. The investigation of histones as possible long-term molecular dosimeters was another focus in this research. The close proximity of histones and DNA coupled with the lack of repair and long lifetime make histones very attractive candidates as molecular dosimeters. The kinetics of histone turnover can most likely be accurately modeled by cellular turnover rates in vivo. Histone adducts were detected in human lung tissue and human bronchial epithelial cells. Histones were also shown to form adducts with BPDE, aflatoxin B1 (AFB,) and nitrosomethylurea (NMU) in TK6 cells grown in vitro. Histone adducts of AFB 1 , NMU, and BPDE were shown to be stable over 5 cell divisions.
by Can Cemil Özbal.
Ph.D.
Martin, Michael. "Industrial Symbiosis in the Biofuel Industry : Quantification of the Environmental Performance and Identification of Synergies." Doctoral thesis, Linköpings universitet, Industriell miljöteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-90233.
Повний текст джерелаProduktionen av biobränslen har ökat de senaste åren, vilket är ett steg mot klimateffektivare lösningar i transportsektorn, men biodrivmedlen har ifrågasatts med hänvisning till tveksamheter kring deras miljö- och energiprestanda. Lifecykelanalyser har därför använts inom akademiska studier och för policy för att utvärdera systemen, dock utan samstämmiga resultat. Under de kommande åren måste därför praxis för produktion av biobränslen förbättras för att kunna möta de strikta kraven i hållbarhetskriterier för biobränslen. Syftet med forskningen som presenteras i den här doktorsavhandlingen är att utforska och analysera koncept från området Industriell symbios (IS) och därigenom identifiera förbättringar för ökad effektivitet och miljöprestanda för biobränsleproduktion. Vidare är syftet att identifiera möjliga material- och energiutbyten mellan biobränsleproducenter och externa industrier. Potentiella material- och energiutbyten undersöktes, vilket resulterade förslag på flera olika typer av potentiella utbyten. Undersökningen visar på en potential för att använda biprodukter i en biobränsleprocess som råvara till en annan biobränsleframställning. Vidare identifierades en stor potential för utbyten med externa industrier, som till exempel matproducenter samt industrier för energi och kemikalier. Det är tydligt att det finns möjligheter för biobränsleproducenter och externa industrier att samarbeta och därmed ge möjlighet till förbättringar i miljöprestandan, dock kan en implementering av dessa utbyten påverkas av många olika förutsättningar. Avhandlingen presenterar även ett tillvägagångssätt för att visa hur kvantifiering av miljöprestanda inom ett nätverk för IS kan genomföras genom att använda riktlinjer och metodavvägningar från litteratur för livscykelanalys. Detta tillvägagångssätt kan användas för att analysera om koncept från IS kan leda till fördelar för företagen i ett IS-nätverk. Tillvägsgångssättet ger möjlighet att kvantifiera miljöprestandan för företagen i IS-nätverket och ger dessutom vägledning för hur miljöpåverkan från utbytena kan distribueras mellan de olika företagen. Metoden utvecklades för att bland annat undersöka de förmodade fördelarna från IS för varje enskild aktör. Livscykelanalys i kombination med tillvägagångssättet ovan har använts för att kvantifiera miljöprestandan för IS-nätverk genom att konstruera scenarier. Scenarierna har baserats på ett exempel från ett IS-nätverk av biobränsleprocenter i Sverige. Analyserna visar att utbyten av material- och energi kan ge förbättringar i miljöprestanda. Resultaten är dock beroende av vilka metodavvägningar som gjorts, till exempel val av referenssystem, funktionell enhet och allokeringsmetoder. Vidare spelar viktiga processer som inputs från jordbruk och val av energisystem stor roll för resultatet. Metodavvägningar för utväderingen influerar även miljöpåverkan samt hur den fördelas mellan företagen i IS-nätverket. Dessutom kan den lokala miljöpåverkan öka medan den globala påverkan minskar. Sammanfattningsvis kan biobränsleproducenter, genom att använda koncept från industriell symbios, ges möjlighet att förbättra sin miljöprestanda. Detta kan ske genom att använda biprodukter och avfall samt genom att diversifiera sina produkter som ett första steg mot en övergång mot bioraffinaderier och en mer biobaserad ekonomi för regional hållbarhet.
Peng, Chiung-Yu. "Identification and quantification of volatile organic compound emissions from buildings and heating, ventilating and air conditioning systems." Ann Arbor, Mich. : University of Michigan, 1998. http://books.google.com/books?id=yxIvAAAAMAAJ.
Повний текст джерелаMa, Ruowei, and 馬若為. "Quantification and partition of perfluorochemicals in Hong Kong wastewater sludge." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B43223862.
Повний текст джерелаLi, Hanyang. "Identification, Quantification, and Constraint of Uncertainties Associated with Atmospheric Black Carbon Aerosols." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu158533806705194.
Повний текст джерелаHolanda, Maisa Viana de. "Detection and quantification of Mycobacterium leprae by real time PCR from environmental samples of Cearà municipalities." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14649.
Повний текст джерелаA hansenÃase à uma doenÃa infecciosa crÃnica e granulomatosa responsÃvel por afetar a pele e os nervos perifÃricos, sendo ocasionada pelo Mycobacterium leprae, um agente intracelular obrigatÃrio incapaz de ser cultivado em meios de cultura axÃnicos. No ano de 2012, foram detectados 232.857 casos novos no mundo, sendo desses 33.303 (14, 30%) detectados somente no Brasil. O Estado do Cearà diagnosticou 2.066 casos novos sà no ano de 2012, com um coeficiente detecÃÃo geral de 24,0/100.000 habitantes. A transmissÃo da doenÃa està relacionada com eliminaÃÃo dos bacilos provenientes de pacientes multibacilares atravÃs do trato respiratÃrio superior e, como a bactÃria fica em suspensÃo no ar, ocorre a posterior contaminaÃÃo de outra pessoa. A existÃncia de casos clÃnicos da doenÃa nos quais os pacientes nÃo tiveram nenhum contato anterior com portadores de hansenÃase e, ainda, Ãreas com casos prÃximos de fontes de Ãgua sugere infecÃÃo do ser humano com fontes ambientais. Por isso, atualmente, pesquisa-se a possÃvel interferÃncia de fatores ambientais e animais silvestres na transmissÃo da hansenÃase, como solo, Ãgua, vegetaÃÃo e tatus. O ambiente funcionaria como uma espÃcie de reservatÃrio, permitindo que o bacilo permaneÃa infeccioso apÃs longos perÃodos fora do corpo humano. Este estudo tem como objetivo principal detectar e quantificar bacilos de M. leprae por qPCR em amostras de Ãguas ambientais provenientes de municÃpios cearenses. Foram coletadas cinco rÃplicas de cada um dos 30 reservatÃrios selecionados, totalizando 149 amostras. O DNA total foi extraÃdo atravÃs de kit especÃfico para amostras ambientais de acordo com as recomendaÃÃes do fabricante. Posteriormente, foi realizado a amplificaÃÃo do gene 16S rRNA de M. leprae atravÃs de qPCR com o uso do kit SYBR Green PCR Master Mix. Utilizou-se uma curva padrÃo com concentraÃÃes conhecidas de plasmÃdeo pIDTBlue 16SrRNAMlep para quantificar o DNA presente nas amostras ambientais. As amostras ambientais do municÃpio de Juazeiro do Norte e as amostras clÃnicas provenientes de pacientes atendidos no CDREM foram genotipadas e subtipadas por PCR-RFLP. O DNA de M. leprae foi detectado em todos os municÃpios estudados. Do total de 149 amostras de Ãgua analisadas, 81 (54,4%) foram positivas para a pesquisa de DNA. O nÃmero de cÃpias de M. leprae se manteve no intervalo de 1,42 x 10-1 a 1,44 x 10+2 . A maioria das amostras clÃnicas apresentou genÃtipo 4 (64%) enquanto que 100% das amostras de Juazeiro do Norte foram SNP 4. Com relaÃÃo a subtipagem, o SNP 4-N foi o mais presente dentre as amostras analisadas. Este estudo indica a existÃncia de DNA de M. leprae nas amostras de Ãguas ambientais, mostrando fundamentalmente a presenÃa de bacilos nas Ãguas analisadas. TambÃm relata que a maioria das cepas de M. leprae das fontes ambientais estudadas à do mesmo subtipo das isoladas do homem. Dessa forma, sÃo necessÃrios mais estudos a fim de ampliar o conhecimento da influÃncia da Ãgua na transmissÃo da hansenÃase.
Vowles, Andrew. "Experimental quantification of the response of fish to conditions associated with low-head hydropower and fish passage facilities." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/360333/.
Повний текст джерелаHofvander, Lotta. "Polychlorinated biphenyls and their metabolites in human blood : Method development, identification and quantification." Doctoral thesis, Stockholm : Dept. of environmental chemistry, Stockholm university, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-805.
Повний текст джерелаKuo, Dave Ta Fu 1978. "Thermodynamics and kinetics of hydrophobic organic compound sorption in natural sorbents and quantification of black carbon by electron microscopy." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/60793.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (v. 3, p.1198-1258).
The sorption behaviors of hydrophobic organic compounds (HOCs) in sediments were investigated using pyrene. Native pyrene desorbed slowly, taking from weeks to months to equilibrate. The end-point data suggested that, at nanogram-pyrene-per-liter porewater levels, sorption was much stronger than conventionally expected. The non-linearity of the isotherm may indicate physical occlusion of native sorbate and/or sorption onto micropore surfaces of char/charcoal. Between 30-70% of the native pyrene may be occluded. Conceptual pictures for both hypotheses were presented with supportive evidence from experiments and literature. Analysis of experimental and literature data suggested logKoc (organic-carbon normalized partition coefficient) and logKBC (black-carbon normalized partition coefficient) values were fairly constant across different geosorbents (around 4.5-5.7 and 5.6-6.3, respectively), while the non-linearity exponent varied substantially. This may explain the orders of magnitude scatter in logKoc's and logKBC's reported in recent reviews. An a priori non-linear numerical model based on Intra-particle Porewater Diffusion (IPD) was constructed and successfully predicted the desorption kinetics of native pyrene. Fitted kinetic parameters correlated with system and sorbate/sorbent properties. This suggested the empirical approach can be replaced by the a priori model and the diverse HOC desorption rates in the literature can be reconciled if relevant physicochemical properties are known. The regional fate of pyrene in Boston Harbor was evaluated with a box model using derived kinetic and equilibrium properties. Realistic predictions can be obtained when assuming pseudo steady state conditions, but not equilibrium partitioning, for the bed sediment and the water column. Furthermore, model results and literature evidence suggested that sediment resuspension may be a significant mobilization mechanism for sedimentary HOCs in estuaries and harbors. A new BC quantification method based on energy dispersive X-ray spectroscopy (EDX) was developed. The method identified/quantified Organic Carbon (OC) or Black Carbon (BC) by analyzing the elemental ratios of C, N, and 0 of the sample. Agreeable OC/BC estimates on a variety of carbonaceous materials were obtained using the method. The good analytical potential of the method warranted further exploration and methodological refinement. This study has great implications for the sequestration and bioavailability of HOCs in the environment.
by Dave T. F. Kuo.
Ph.D.
Turner, Alison Jean May. "Diffuse minewater pollution : quantification and risk assessment in the Tamar catchment." Thesis, University of Plymouth, 2011. http://hdl.handle.net/10026.1/891.
Повний текст джерелаHu, Jiangchuan. "Quantification of Carbonaceous Pollutants from On-Road Vehicles at Selected Inner-City Settings." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1338581858.
Повний текст джерелаDeol, Suhina, and Suhina Deol. "The Effects of Water Quantification on Tribal Economies: Evidence from the Western U.S." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/624150.
Повний текст джерелаWiegard, Jean, and JWiegard@groupwise swin edu au. "Quantification of Greenhouse Gases at Visy Industries using Life Cycle Assessment." Swinburne University of Technology. School of Engineering and Science, 2001. http://adt.lib.swin.edu.au./public/adt-VSWT20030729.140753.
Повний текст джерелаGreen, Jon Marc. "Development of novel transgenic zebrafish models and their application to studies on environmental oestrogens." Thesis, University of Exeter, 2016. http://hdl.handle.net/10871/27141.
Повний текст джерелаMueller, Amy 1980. "Development of a combined multi-sensor/signal processing architecture for improved in-situ quantification of the charge balance of natural waters." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74267.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student submitted PDF version of thesis.
Includes bibliographical references (p. 189-197).
This thesis details the design, implementation, and testing of a new electrochemical instrument for the in situ measurement of both major and environmentally relevant minor ions in fresh waters, namely Na+, K+, Ca2+, Mg2+, NH+4 , Cl-, NO-3 , and SO2-4 . The instrument is built on a hybrid multi-probe / signal processing architecture and is implemented using commercial sensor hardware (primarily ion-selective electrodes (ISEs)) paired with a novel neural network processor designed to take advantage of a priori chemical knowledge about the system. Adaptation of this architecture to in-situ conditions and quantification of relatively minor ions required overcoming a number of challenges, including: (1) lack of a standardized method for unsupervised recording of ISE equilibrium potential, (2) non-availability of commercial electrodes for some ion species, and (3) detection of ion concentrations that fall below the ISE linear response region and/or are confounded by the presence of relatively large quantities of interfering ions. As such, a methodology is proposed and validated for standardization of ISE potential readings, resulting in consistent measurements completed in <6.5 min., improving replicability, and facilitating simultaneous measurement of up to 12 ion channels. The sensor suite is then designed such that each ISE provides information about more than one analyte, and finally, the artificial neural network (ANN) architecture is optimized for use on environmental chemical data by including software constraints implementing known chemical relationships, i.e., the concept of charge balance and the total ion-conductivity relationship. Two experiments are conducted using environmentally-relevant data sets (one semi-synthetic, one created in the lab) to characterize the eectiveness of the proposed ANN architecture. Final results demonstrate over an order of magnitude decrease in relative error (as measured against use of ISEs as stand-alone sensors) without concentration-dependent error bias, including estimates for analytes for which no specfic ISE exists (SO2-4 , Mg2+, HCO-3 ). Simultaneous un-biased quantification of all eight ions is achieved with ~20% error on most channels including NO-3 (concentrations -100 [mu]M) and ~50% error for NH+4 (-100 [mu]M), however it is also demonstrated that errors of ~10% are achievable for N-species ions even at low concentration if slightly higher uncertainties on other channels can be tolerated.
by Amy Violet Mueller.
Ph.D.
Dorner, Wolfgang. "Environmental economic aspects of river basins and their catchment. Identification and quantification of flood related land use externalities." University of Southern Queensland, Faculty of Engineering and Surveying, 2009. http://eprints.usq.edu.au/archive/00006189/.
Повний текст джерелаWambo, Kathryn Ann. "Quantification of Microcystis in the Waters of Western Lake Erie and the Maumee River in the Summer of 2009." University of Toledo / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1272632694.
Повний текст джерелаAndersson, Simon, and Johan Petersson. "Potential for Urban Mining in Norrköping : a Static Quantification of Metal in Subterranean Infrasystems." Thesis, Linköpings universitet, Tema vatten i natur och samhälle, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-68929.
Повний текст джерелаKelly, Joseph P. "Dry Needling of Myofascial Trigger Points: Quantification of the Biomechanical Response Using a Myotonometer." Diss., NSUWorks, 2017. https://nsuworks.nova.edu/hpd_pt_stuetd/68.
Повний текст джерелаNewbold, Lynda Rhian. "Experimental quantification of fish swimming performance and behavioural response to hydraulic stimuli : application to fish pass design in the UK and China." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/385313/.
Повний текст джерелаChen, Michael Andrew. "Pore-scale processes : quantification of the controls on the transport of Ra and Cr, and development of a novel geochemical visualization tool." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/123225.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 123-140).
Addressing soil contamination inorganic metals and metalloids remains a critical task for the continuing protection of human health globally. The dissolved concentrations of contaminants are controlled by a wide range of biogeochemical processes including oxidation and reduction by microbes, sorption to minerals and organic matter, and complexation with ligands in solution. Depending on the contaminant of interest, the importance of these different processes will widely vary, and the natural heterogeneity of soil systems all further frustrate modeling of contaminant transport. Recent studies have demonstrated that soil conditions vary at scales as small as individual soil pores, suggesting that the controls on contaminant transport also vary at that scale. Understanding the impact these pore scale processes have is necessary to build accurate conceptual models of contaminant fate. The work here explores these types of microscale processes through three different projects. The first project focuses on the sorption of radium, a naturally occurring radioactive material, to different minerals. Surface complexation modeling of Ra was able to replicate sorption experiments, but could not predict the impact of different solution conditions. The second project examines metal reduction via Fe (hyrd)-oxides, showing that bacteria may be able to form networks with semi-conducting Fe (hydr)-oxides. This means bacteria can access electron acceptors without physical contact, and will impact the cycling of redox sensitive metals at pore scales. The final project was the development in a microfluidic device that could be used to directly visualize biogeochemical processes at pore scales through x-ray fluorescence microprobe spectroscopy. The three projects, though focused on different systems, each reveal the importance of considering how microscale processes impact transport of contaminants.
by Michael Andrew Chen.
Ph. D.
Ph.D. Massachusetts Institute of Technology, Department of Civil and Environmental Engineering
Boulard, Lise [Verfasser], Joachim [Gutachter] Scholz, and Thomas A. [Gutachter] Ternes. "Method development for the quantification of pharmaceuticals in aqueous environmental matrices / Lise Boulard ; Gutachter: Joachim Scholz, Thomas A. Ternes." Koblenz, 2021. http://d-nb.info/1224885457/34.
Повний текст джерелаElderbrock, Evan. "Revealing Promising Pathways for Increasing Urban Ecosystem Services: An Approach Combining Stakeholder Priorities with Ecosystem Service Quantification." Thesis, University of Oregon, 2019. http://hdl.handle.net/1794/24232.
Повний текст джерела2020-01-11
Akpabey, Felix Jerry. "Quantification of the cross-sectoral impacts of waterweeds and their control in Ghana." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1005435.
Повний текст джерелаBoedecker, Ashlynn Rose. "Evaluating sediments as an ecosystem service in western Lake Erie through quantification of nitrogen cycling pathways." Wright State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1545068281691301.
Повний текст джерелаPalagama, Dilrukshika S. W. "Development of Liquid Chromatography-Mass Spectrometry Methods for Identification and Quantification of Microcystins in Water and Biological Fluids, and their Removal from Water." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544703858711738.
Повний текст джерелаXie, Ting. "Quantification of carbon emissions and removals from land, plants, and products : A case study of cotton used in IKEA'sproducts." Thesis, Linköpings universitet, Tema Miljöförändring, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-178813.
Повний текст джерелаCochran, Samuel J. "Improved quantification of fungal exposures in house dust from homes of asthmatic children using quantitative Polymerase Chain Reaction (qPCR)." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555660151059543.
Повний текст джерелаColeman, Kristen K. "Environmental Detection and Quantification of Airborne Influenza A Virus in an Elementary School, and its Implications for Student and Community Illness." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1493372170333178.
Повний текст джерелаBadenhorst, Hendrik Louis. "The environmental monitoring and quantification of M. tuberculosis occupational exposure risk in various occupational settings in a platinum mine / H.L. Badenhorst." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4653.
Повний текст джерелаThesis (M.Sc. (Occupational Hygiene))--North-West University, Potchefstroom Campus, 2011.
Andersen, Mark R. "Quantification of cytochrome P450 expression : a biomarker of chemical exposure and a tool for basic research /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/8448.
Повний текст джерелаCagle, Lauren M. "Municipal Wastewater Disinfection with Electromagnetic Waves using Escherichia coli Concentration as Measurement of Quantification." ScholarWorks@UNO, 2012. http://scholarworks.uno.edu/td/1500.
Повний текст джерелаDuFour, Mark R. "Hydroacoustic Quantification of Lake Erie Walleye (Sander vitreus)Distribution and Abundance." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1483715286731694.
Повний текст джерелаOlsen, Peter A. "Shear Modulus Degradation of Liquefying Sand: Quantification and Modeling." BYU ScholarsArchive, 2007. https://scholarsarchive.byu.edu/etd/1214.
Повний текст джерелаAccardi-Dey, AmyMarie 1976. "Black carbon in marine sediments : quantification and implications for the sorption of polycyclic aromatic hydrocarbons." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/39160.
Повний текст джерелаIncludes bibliographical references.
Sorption is a key factor in determining the fate of polycyclic aromatic hydrocarbons (PAHs) in the environment. Here, PAH sorption is proposed as the sum of two mechanisms: absorption into a biogenic, organic carbon (OC) fraction and adsorption onto a combustion-derived, black carbon (BC) fraction. To study BC adsorption, a 375ʻC thermal oxidation method was employed to remove OC and isolate the BC fraction. Test studies showed that nitrogen-containing macromolecules charred during this pretreatment causing a positive bias to the BC measurement. Meanwhile, the oxidation of relatively small BC particles underestimated the total BC content in non-charring samples. Models based on carbon oxidation were then proposed to estimate reasonably the total BC and OC contents of sediment samples. The adsorption of pyrene onto isolated BC particles was then studied by constructing a nonlinear isotherm, which was characterized with a BC-normalized distribution coefficient and a Freundlich exponent. Pyrene sorption to Boston Harbor sediment was then modeled as the sum of OC absorption and BC adsorption using the measured adsorption parameters and literature absorption values. Finally, literature reports of high PAH distribution coefficients from the field and nonlinear PAH isotherms from the laboratory were re-explained by considering BC adsorption.
by AmyMarie Accardi-Dey.
Ph.D.
Sanchez, Maria Ambert. "Quantification of Soil Physical Properties by Using X-Ray Computerized Tomography (CT) and Standard Laboratory (STD) Methods." Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2003. http://www.osti.gov/servlets/purl/822059-1gxx3T/native/.
Повний текст джерелаPublished through the Information Bridge: DOE Scientific and Technical Information. "IS-T 2608" Maria Ambert Sanchez. 12/12/2003. Report is also available in paper and microfiche from NTIS.
Bhuyan-Erhardt, Upasana Priyambada [Verfasser], Annette [Akademischer Betreuer] Menzel, Achim [Gutachter] Bräuning, and Annette [Gutachter] Menzel. "Drought quantification by multivariate indices and their validation against various environmental data / Upasana Priyambada Bhuyan-Erhardt ; Gutachter: Achim Bräuning, Annette Menzel ; Betreuer: Annette Menzel." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1159703612/34.
Повний текст джерелаDuFour, Mark R. "Quantification of Variability, Abundance, and Mortality of Maumee River Larval Walleye (Sander vitreus) Using Bayesian Hierarchical Models." University of Toledo / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1351976817.
Повний текст джерела