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Dissertations / Theses on the topic 'Water detection'

Author: Grafiati

Published: 25 May 2024

Last updated: 25 July 2025

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1

Chienthavorn, Orapin. "Detection in superheated water chromatography." Thesis, Loughborough University, 1999. https://dspace.lboro.ac.uk/2134/32394.

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Superheated water has been used successfully as an eluent in liquid chromatography and has been coupled to various modes of detection, ultraviolet (UV), fluorescence, and nuclear magnetic resonance spectroscopy (NMR) and mass spectrometry (MS). A number of compounds were examined on poly(styrene-divinylbenzene) (PS-OVB), polybutadiene (PBO), and octadecylsilyl bonded silica (OOS) column with isothermal and temperature programmes.

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2

Bergua, Canudo José Francisco. "Nanobiosensors for contaminants detection in water." Doctoral thesis, TDX (Tesis Doctorals en Xarxa), 2020. http://hdl.handle.net/10803/670394.

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Aquesta tesi té com a objectiu desenvolupar biosensors per al monitoratge ambiental. Primer, s'ha desenvolupat un biosensor colorimètric basat en lateral flow strips (LFS) per a la detecció i quantificació d'Escherichia coli com a indicador fecal universal. En aquest cas, nanopartícules d'or (AuNP) s'utilitzen com a transductors òptics i anticossos policlonals com a elements de bioreconeixement per capturar, marcar i indicar la presència del bacteri. Paral·lelament, s'ha desenvolupat un sistema de filtració per millorar la sensibilitat dels LFS. L'optimització del flux de la mostra a través de

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3

Gao, Yan. "Leak detection in plastic water pipes." Thesis, University of Southampton, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.423122.

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4

Samuelsson, Oscar. "Fault detection in water resource recovery facilities." Licentiate thesis, Uppsala universitet, Avdelningen för systemteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-329777.

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Reliable sensor values are important for resource-efficient control and operations of wastewater treatment processes. Automatic fault detection methods are necessary to monitor the increasing amount of data produced in any modern water resource recovery facility (WRRF). Most on-line measurements exhibit large variations under normal conditions, due to considerable variations in the influent flow. The work reported in this licentiate thesis deals with fault detection in WRRFs. In the first paper, we studied how Gaussian process regression (GPR), a probabilistic machine learning method, could be

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5

Gelin, Martin, and Skogsberg Rikard Fridsén. "Water Contamination Detection With Artificial Neural Networks." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-295605.

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Drinking water is one of our most important re- sources, so the ability to reliably monitor harmful contaminations in our water distribution network is vital. In order to minimize false alarms for water monitoring, while keeping a high sensitivity, a machine learning approach was evaluated in this project. Measurement data captured with a new kind of sensor, an electronic tongue, was provided by Linköping university. The solution was an artificial neural network, in the structure of an Autoencoder, which could learn the dynamic behaviour of natural deviations and with a false alarm rate of app

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6

Nobliá, Matilda, and Christian Ryan. "Contamination Event Detection in Water Distribution Systems." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214698.

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In any society, making sure that its citizens havea clean water supply is a fundamental issue. By modernizingthe way water distribution systems (WDSs) are monitored andcontrolled, the impact of contamination can be maintained andminimized. By using sensors that monitor relevant physicalparameters, a system that detects contamination and limitspopulation exposure can be designed. To achieve this, the workpresented in this report is focused on three main topics.Firstly, parameters for determining water quality are examined.This is the basis for choosing relevant sensors. Secondly,a study of cont

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7

Mvelase, Mashinga Johannes. "Radon escape from water." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3869_1307688700.

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<p>This thesis aims to measure the rate of radon loss from water in a systematic way. The dependence on surface area, temperature and concentration will be investigated. The experiments were done at UWC by creating radon using radium sources and then measuring the radon concentrations inside a vacuum chamber to obtain the speed of radon escape from the water. The results are compared to a model [Cal 2002] where the radon concentration in the air and hence the transfer rate is measured using a RAD7 radon detector. Since the equations cannot be solved analytically, a numerical solution is employ

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8

Walrath, Karen Elizabeth. "Evanescent wave spectroscopy for detection of water and water treeing in polymers." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/40582.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.<br>Includes bibliographical references (p. 185-191).<br>by Karen Elizabeth Walrath.<br>Ph.D.

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9

Wennberg, Aina Charlotte. "PCR-detection of Vibrio cholerae in ballast water." Thesis, Norwegian University of Science and Technology, Department of Biotechnology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-6883.

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10

Parent, Uribe Santiago. "Endotoxins detection and control in drinking water systems." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100231.

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Endotoxins are a constituent of the lipopolysaccharide (LPS) complexes present in the outer layer of the cell wall of most Gram-negative bacteria and some cyanobacteria. The ingestion by a typical adult of amounts exceeding 1,000 endotoxin units (EUs) can cause fever, diarrhoea, vomiting, acute respiratory illnesses, and lung inflammation. In contrast, much smaller doses may lead to protective immunity against allergic diseases.<br>Endotoxins can be released in the air as well as in the water; previous studies have mainly focused on airborne endotoxins. Although many studies on endotoxins in r

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11

Hou, Ting. "DNA microarray-based detection of water-borne viruses." Thesis, University of Surrey, 2007. http://epubs.surrey.ac.uk/2165/.

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Viruses can be transmitted through and contaminate waters causing waterborne epidemics to humans and animals. There is insufficient understanding about how viruses survive in the environment, and to what extent this may differ between agents or in the co-presence of other micro-organisms. The limited data makes it difficult to determine the risks of viruses and this hinders the preparation of preventative plans against viral transmission through the waters. This project sought to establish a DNA microarraybased approach to detect and differentiate between viruses in environmental waters, to pr

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12

Kallingalthodi, Hari. "Cavitation Detection In a Water Jet Propulsion Unit." Thesis, University of Canterbury. Electrical and Computer Engineering, 2009. http://hdl.handle.net/10092/4438.

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Various sensing and digital signal processing approaches to detect cavitation in a water jet propulsion unit were examined based on results in the literature. Several commercially viable sensors were evaluated based upon their ability to detect the cavitation phenomenon, cost, and robustness. An algorithm has been implemented and tested against data recorded from the candidate sensors. The combination of vibration and pressure sensors and the algorithm appear promising and a path for further development and testing is available to Hamilton Jet.

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13

Li, Wenhua. "Channel response and target detection in shallow water." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/42573.

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14

Enriquez-Enriquez, Carlos. "Detection and survival of selected viruses in water." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186948.

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Nucleic acid hybridization (gene probe) and polymerase chain reaction (PCR) techniques have been used to detect viral nucleic acid in water. However, gene probe and PCR may not distinguish between infectious and noninfectious viruses. This study evaluated the ability of gene probe to detect viable poliovirus 1 (polio 1), from sterile and nonsterile groundwater, and the ability of PCR to detect infectious human immunodeficiency virus (HIV-1) from tap and wastewater. The plaque forming (BGM cells), and the tissue culture infectious dose fifty (TCID₅₀) (PLC/PRF/5 cells) procedures were used to de

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15

Goh, Jung Hean. "Real time water pipes leak detection using electromagnetic waves for the water industry." Thesis, Liverpool John Moores University, 2011. http://researchonline.ljmu.ac.uk/6013/.

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This project concerns the use of an electromagnetic sensor for the detection of leaks/cracks in water pipes. As old metal pipes corrode they start to become brittle, resulting in the potential for cracks to appear in the pipes. In addition corrosion can build up resulting in a restricted flow of water in the pipe. Using an electromagnetic (EM) wave sensor to monitor the signal reflected from the pipes in real time, provides the necessary information to determine where a leak in the pipe has occurred. Analysis of the reflected signal can provide the operator with information about the condition

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16

Du, Preez Martella. "Development of novel seminested polymerase chain reaction assays for detecting toxigenic Vibrio cholerae and Shigella spp. in water." Diss., University of Pretoria, 2001. http://hdl.handle.net/2263/26893.

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17

Young, Toby Edward. "Water-only chemical analysis methodologies : investigations of water liquid chromatography, subcritical water extracton, and dynamic surface tension detection /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/8528.

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18

Tandon, Puja. "Detection and enumeration of faecal indicator bacteria in water." Thesis, Northumbria University, 2006. http://nrl.northumbria.ac.uk/1133/.

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This study investigated the effects of various factors, namely exposure to brass/copper, sunlight, high temperature, chlorine, low pH, or starvation, on the enumeration of faecal indicator bacteria in water, performed using non-selective & selective media under conventional aerobic conditions & under conditions designed to neutralise reactive oxygen species e.g. by the addition of 0.05% w/v sodium pyruvate as a scavenger of peroxides &/or anaerobic incubation, to encourage fermentative metabolism. These methods were compared with standard US & UK methods for the recovery of injured bacteria. T

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19

Hodgkinson, Jane. "Photoacoustic and photothermal detection of trace compounds in water." Thesis, University of Southampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244982.

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20

Choi, Changrak. "Robot design for leak detection in water-pipe systems." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/70434.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 113-116).<br>Leaks are major problem that occur in the water pipelines all around the world. Several reports indicate loss of around 20 to 30 percent of water in the distribution of water through water pipe systems. Such loss of water represents critical waste of valuable resources, especially in countries such as Saudi Arabia where water is scarce. Moreover, leaks provide pathways for outside contaminants to enter into

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21

Sushko, O. A., О. М. Bilash, and M. M. Rozhitskii. "Nanophotonic method for polycyclic aromatic hydrocarbons detection in water." Thesis, ISE, 2012. http://openarchive.nure.ua/handle/document/8866.

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Polycyclic aromatic hydrocarbons (PAHs) are the widespread environmental contaminants that can be found in atmosphere, water, soil, sediment and organisms. Among most dangerous PAHs is benzo[a]pyrene (BP). The effects of BP on health are: short-term when people are exposed to it at levels above the maximum contaminant level (MCL) (0.2 ppm) for relatively short periods of time leading to red blood cells damage, anemia ect; suppression of immune system and long-term, when human beings are exposured do BP influence at levels above the MCL namely effects on reproducibility and high probability of

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22

Sushko, O. A., О. М. Bilash, and M. M. Rozhitskii. "Nanophotonic method of organic carcinogens detection in water objects." Thesis, Technische Universität Ilmenau, 2012. http://openarchive.nure.ua/handle/document/8867.

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Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental agents commonly believed to contribute significantly to human cancers pathologies. PAHs are formed in the process of incomplete combustion of organic material and are found widely in the environment, for example, in water, food, soil etc. so human exposure to PAHs is unavoidable. Like many other carcinogens, polycyclic aromatic hydrocarbons are metabolized enzymatically to various metabolites, of which some are highly reaction active. One of the most dangerous organic PAHs carcinogens is benzo[a]pyrene (BP). There are known m

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23

Saberi, Atefeh. "Automatic outlier detection in automated water quality measurement stations." Master's thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/25908.

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Des stations de mesure de la qualité de l’eau sont utilisées pour mesurer la qualité de l'eau à haute fréquence. Pour une gestion efficace de ces mesures, la qualité des données doit être vérifiée. Dans une méthode univariée précédemment développée, des points aberrants et des fautes étaient détectés dans les données mesurées par ces stations en employant des modèles à lissage exponentiel pour prédire les données au moment suivant avec l’intervalle de confiance. Dans la présente étude, ne considérant que le cas univarié, la détection de points aberrants est améliorée par l’identification d’un

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24

Jurkevica, Agnese. "Bead-based Immunoassays for Detection of Mircoorganisms in Water." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1267625497.

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25

Tittle, Jacob. "Potable Water Leakage Prediction and Detection using Geospatial Analysis." Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/etd/3663.

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Due to increasing water treatment costs and conservation needs, traditional water loss analysis and acoustic leak detection methods are becoming heavily scrutinized by water utilities. This study explores water loss in Johnson City, Tennessee and how geospatial data analysis techniques improve water loss mitigation. This project uses sample water system pressure data and ordinary kriging spatial interpolation methods to identify leakage areas for further investigation. Analysis of existing geographic information system (GIS) water utility datasets with interpolated hydraulic grade values at sa

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26

Kuwahara, Sara Sadae. "Quantum Dot Applications for Detection of Bacteria in Water." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/193744.

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Semiconductor nanocrystals, otherwise known as Quantum dots (Q dots), are a new type of fluorophore that demonstrates many advantages over conventional organic fluorophores. These advantages offer the opportunity to improve known immunofluorescent methods and immunofluorescent biosensors for rapid and portable bacterial detection in water. The detection of the micro organism Escherichia coli O157:H7 by attenuation of a fluorophore’s signal in water was evaluated alone and in the presence of another bacterial species. A sandwich immunoassay with antibodies adhered to SU-8 as a conventional comp

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27

Tijunelyte, Inga. "Development of SERS nanosensor for detection of water pollution." Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCD007/document.

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La pollution des eaux par des composés organiques constitue un problème mondial majeur. Parmi cescomposés, les molécules aromatiques de faibles masses molaires constituent une famille largementrependue dont la toxicité et la cancérogénicité est avérée et bien documentée. La Directive-CadreEuropéenne sur l’eau (2000/60/EC, 2006/118/EC and 2006/11/EC) établit des normes de qualitéenvironnementales ayant pour objectif d’améliorer la qualité des eaux. Dans ce contexte, ledéveloppement d’outils analytiques robustes, permettant de détecter et de quantifier précisément et insitula présence de polluan

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Barrett, Brian Edward. "Water-borne geophysics for Murray River salt-load detection." Title page, contents and abstract only, 2003. http://web4.library.adelaide.edu.au/theses/09SM/09smb2741.pdf.

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Includes bibliographical references (leaves 112-115) Towed DC Resistivity and Transient Electromagnetic arrays have been trialled for suitability in monitoring salt-loads on the Murray River at Waikerie, South Australia.

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Sellwood, Jane. "Studies on enteric viruses in water and sewage." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314325.

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Coyle, Sadie Marie. "Investigations of microcystins (cyanobacterial peptide toxins) : detection, purification and analysis." Thesis, Robert Gordon University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360091.

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31

Farah, Elias. "Detection of water leakage using innovative smart water system : application to SunRise Smart City demonstrator." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10103/document.

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Le travail de thèse porte sur l'utilisation des réseaux d’eau potable intelligents pour la détection des fuites. Il s’inscrit dans le cadre du projet SunRise qui vise à transformer la Cité Scientifique de l’Université de Lille en une ville intelligente et durable. Le campus représente une petite ville de 25000 habitants. Ce travail fait également partie du projet européen SmartWater4Europe, qui vise à développer 4 démonstrateurs des réseaux d’eau intelligents. Le travail comporte 5 parties. La première partie comprend une étude bibliographique sur les technologies pour la détection des fuites.

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Thomas, Bruce Carleton University Dissertation Geography. "Visual interpretation of thematic mapper imagery for the change detection of wetlands in eastern Ontario." Ottawa, 1988.

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33

Mwila, Katayi. "Rapid enzymatic detection of organophosphorous and carbamate pesticides in water." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1004084.

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The increased use of pesticides has resulted in a corresponding increase in concern for the effect they may have on the health of humans and other non-target organisms. The two main areas of concern are the toxicological effects that mixtures of pesticides may have as well as the endocrine disrupting effects. Although the individual pesticides may be present at concentrations below the levels deemed to be detrimental to health, it has been argued that their combined effect may still result in elevated health risks. Another important aspect of pesticide risk assessment requires a consideration

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Fiadzomor, Phyllis Aku Yayra. "Trace detection of water vapour by cavity ring-down spectroscopy." Thesis, University of Bristol, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492638.

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A continuous wave cavity ring-down (CRD) spectrometer has been developed for the measurement of trace levels of water vapour by absorption spectroscopy at wavelengths m make cavity ring-down spectroscopy potentially more useful than current techniques for measurement of trace water in process gases and vacuum environments of semiconductor manufacture where water vapour contamination has a detrimental effect on the final product.

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Fung, Wai-kit, and 馮偉傑. "Generation and detection of ozone and hydroxyl radicals in water." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31228215.

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Oliver, Jennifer Valerie. "Detection of phenols in water using SPR and specific receptors." Thesis, University of Kent, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252587.

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Clegg, I. M. "Microwave techniques for the detection of water in crude oil." Thesis, University of Manchester, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372184.

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38

Takir, Driss, Vishnu Reddy, Juan A. Sanchez, Michael K. Shepard, and Joshua P. Emery. "DETECTION OF WATER AND/OR HYDROXYL ON ASTEROID (16) Psyche." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/622751.

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In order to search for evidence of hydration on M-type asteroid (16) Psyche, we observed this object in the 3 mu m spectral region using the long-wavelength cross-dispersed (LXD: 1.9-4.2 mu m) mode of the SpeX spectrograph/imager at the NASA Infrared Telescope Facility. Our observations show that Psyche exhibits a 3 mu m absorption feature, attributed to water or hydroxyl. The 3 m absorption feature is consistent with the hydration features found on the surfaces of water-rich asteroids, attributed to OH- and/or H2O-bearing phases (phyllosilicates). The detection of a 3 mu m hydration absorptio

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Eberhardsson, Elias. "A Visualization Application for Anomaly Detection in Water Management Systems." Thesis, Luleå tekniska universitet, Datavetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70098.

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Denna rapport beskriver och går igenom processen med att utforma och implementera en applikation för visualisering av data relaterade till vattenhanteringssystem. Datavisualiseringen i fråga är implementerad på en kartvy. Uppgifterna tillhandahålls via Aquaductus sensorenheter vilka placeras i vattenhanteringssystem, dessa för sen regelbundet över data till Aquaductus databas. Applikationen kan både ge en snabb överblick av status över en stor mängd sensorenheter, och är gjord som ett verktyg för att diagnostisera och lokalisera eventuella läckor eller blockeringar. Applikationen är gjord för

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Shi, Shi-Hui. "General Approach for Electrochemical Detection of Small Molecules in Water." Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCC276.

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Durant les dernières décennies, grâce à leur application potentielle en diagnostic clinique, en sécurité alimentaire, en sécurité publique et en surveillance environnementale, les capteurs électrochimiques ont été étudiés avec intérêt. Ce travail s'intéresse à la conception et à la fabrication de deux types de capteurs électrochimiques différents. Pour la première stratégie, un biocapteur électrochimique spécifique de l'acétaminophène sans marqueur ni sonde, a été conçu. La stratégie de détection est basée sur la compétition indirecte ; après immobilisation de l'anticorps correspondant sur la

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Sushko, O. A., О. М. Bilash, and M. M. Rozhitskii. "Nanophotonic method for polycyclic aromatic hydrocarbons detection in water solutions." Thesis, Eurosvit, 2013. http://openarchive.nure.ua/handle/document/8870.

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Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental agents commonly believed to contribute significantly to human cancer pathologies. One of the most dangerous organic PAHs carcinogens is benzo[a]pyrene (BP). Like many other carcinogens, PAHs are metabolized enzymatically to various metabolites, some of which are highly reaction active. Proposed nanophotonic analytical method is based on the process of QDs transfer to ionic forms in an EC process and their subsequent reactions with oppositely charged ionic forms of the analyte – PAHs (BP) inside ECL cell, resulting in the for

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Hansson, Freja. "Detection of Contaminants in Water Using Surface Enhanced Raman Spectroscopy." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-85943.

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Due to deteriorating water quality and the world’s increasing demand for clean water, the need for cheap, easy and portable techniques to characterize and quantify pollutants in waters is urgent. Hence, surface-enhanced Raman spectroscopy (SERS) have gained considerable attention in this field. Atrazine and bentazon are two of the most occurring pesticides causing pollution in Sweden, and where therefore examined in this study, along with 4-mercaptopyridine (mpy) as a reference molecule. In this project, silver and gold nanoparticles where synthesised and used as SERS substrates for detection

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McCracken, Katherine E., Trinny Tat, Veronica Paz, and Jeong-Yeol Yoon. "Smartphone-based fluorescence detection of bisphenol A from water samples." ROYAL SOC CHEMISTRY, 2017. http://hdl.handle.net/10150/623041.

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Bisphenol A (BPA), an emerging environmental contaminant and endocrine disrupting compound, has been observed globally in surface water and waste leachates at concentrations that are hazardous to aquatic life and potentially to humans. Limitations in field monitoring on account of the extensive laboratory infrastructure required for standard BPA detection warrants investigation into portable or handheld sensing platforms. In this work, we evaluated a standalone smartphone-based fluorescence sensing method for identifying BPA from water samples. Toward this goal, we demonstrated the novel appli

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Phillips, Tom. "Detection of Phytophthora cinnamomi from bulk water and soil samples." Thesis, Phillips, Tom (2008) Detection of Phytophthora cinnamomi from bulk water and soil samples. Honours thesis, Murdoch University, 2008. https://researchrepository.murdoch.edu.au/id/eprint/32595/.

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Miles, Syreeta. "Novel Strategies for the Detection of Pathogens in Drinking Water." Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/194069.

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To protect public health, detection methods have been developed to monitor drinking water for pathogens. The goal of this dissertation is to evaluate and utilize novel methods that enhances detection and further reduces the risk of waterborne pathogens. The study in Appendix A developed a method to monitor the microbial quality of treated drinking water at the tap utilizing point-of-use (POU) filter. Tap water supplies were monitored in vending machines throughout Southern Arizona using solid block carbon (SBC) filters as a monitoring tool. Out of 48 SBC filters 54.2% were positive for at lea

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Swiger-Patterson, S., S. R. Piontkowski, Phillip R. Scheuerman, and Phillip R. Musich. "Detection of Cryptosporidium and Giardia in a Rural Water Source." Digital Commons @ East Tennessee State University, 1999. https://dc.etsu.edu/etsu-works/2922.

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Mittmann, Elizabeth(Elizabeth R. ). "Smart water network management with in-pipe leak detection robots." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122119.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 85-87).<br>In this thesis, I created methods and designs to implement smarter, more autonomous water distribution networks (WDNs) and also improved the robots which will travel within the WDN's pipes to better differentiate pipe leaks from bumps in the pipes. Starting from the unit of the in-pipe leak detection robot, I investigated ways to make its soft leak sensors able to differentiate between pulling (due to l

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MARINO, Giovanni, Giovanni MARINO, and Giovanni MARINO. "Detection of the effects of water stress on woody plants." Doctoral thesis, Università degli studi del Molise, 2014. http://hdl.handle.net/11695/66250.

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Climate change is increasing the chronic water scarcity in many world regions, and also in Mediterranean basin. Water is the most limiting resource for plant growth and development where the climate is characterized by high potential evaporation and low and highly variable rainfall during the growing season. Water deficit constraints all the physiological processes involved in photosynthesis. In addition, drought and heat have effects on plats secondary metabolism as the synthesis and the emission of volatile organic compounds (VOCs) that, on global scale, are able to influence the chemical an

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Ruzza, Valentina. "Data assimilation techniques for leakage detection in water distribution systems." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3422772.

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Leakage in pressurized water distribution systems is a major issue for water utilities today, because of the huge concerns over public health risks and the economic constraints on energy and resources. This thesis investigates innovative techniques for the detection of leakages in water distribution systems, relying on the calibration of network hydraulic models. The main goal is to suggest a method to reduce the costs of the field surveys currently required from the leakage detection activity on real systems. An inverse model, based on the coupling between Kalman Filter based data assimilati

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Ruebhart, David Robert. "Alternative Bioassays for the Detection of Cyanotoxins." Thesis, Griffith University, 2009. http://hdl.handle.net/10072/367103.

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Abstract: The presence of cyanobacteria, and their associated toxins, in drinking water supplies presents a public health risk. When specific cyanotoxins are suspected, analyte specific techniques such as HPLC are generally used. However, if there is a bloom of taxa not previously known as toxic, its potential risk has traditionally been determined by the mouse bioassay. Despite its long standing use, this bioassay has several constraints including a lack of precise quantification of cyanotoxins at low concentrations, insensitivity, difficulties in the interpretation of results and slow t

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