Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"Theis"”.
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Evaluation of a Fractional Theis Equation
ABSTRACTThe Theis solution is the most widely used solution for determination of confined aquifer parameters. Because each aquifer is a unique system, sometimes an aquifer cannot accurately be described with the assumptions of the Theis solution. To offer a more general solution for aquifers where …
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Utilizing Machine Learning for Managing Groundwater Supply
Analytical solutions such as the Theis solution have historically been utilized to forecast changes in aquifer water levels resulting from human-driven withdrawals using pumping wells. This method, however, suffers from a number of disadvantages, such as long data acquisition times, model …
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Groundwater Modeling and Hydrogeological Parameter Estimation: Potomac Aquifer System, SWIFT Research Center
… the results to past literature, the calculated (Theis and Cooper-Jacob methods) hydraulic conductivity/transmissivity values are within the same order of magnitude. Using borehole logs as well as apparent conductance and resistivity logs, multiple single and multi-layered models for both the …
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The Serpent of Friendship
This theis represents my first serious, although exploratory, attempt to write in the personal essay genre. I chose themes of friendship and hacky sack because these have been recurring issues in my journal writing for several years. The critical introduction attempts to justify the following …
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Preparation of thiochalcone from thioacetophenone
… from acetophenone. David Shirley also gives theis process in his book “Preparation of Organic Intermediates” published by Wiley and Sons in New York. SOmetimes a metallic oxide dehydration catalyst such as alumina is used.
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Teaching jazz harmony through an understanding of bebop
… aspects shared by these two musical worlds. This theis will address concepts in classical harmony and show how these can be used for the understanding of jazz harmony. The syle in jazz know as 'bepop' will be the focus of this study since it can be looked upon as the 'Baroque era' of jazz.
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Multiwavelength variability of black hole x-ray binaries in the low/hard state
… of the five is the low/hard state; in theis state the X-ray emission appears to be confined to a Comptonising corona surrounding the black hole, the optical and infrared emission comes from a cold accretion disc with a large inner disc radius and a weak continuious jet is emitted from …
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Groundwater Resource Supply Augmentation: A Case Study of Dzamba and Mabulo Villages in Vhembe District Municipality, Limpopo Province, South Africa
… areas. The transmissivity values obtained using Theis and Cooper-Jacob methods were 2,0 m2/day and 1,59 m2/day, respectively. While the Storativity (S) was 0,00003 (Theis method) and 0,4 x 10-7 (Cooper-Jacobs). The study recommends submitting future groundwater project reports within the study …
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A numerical simulation of pressure distribution and radius of drainage in infinite radial aquifers - constant rate case
… presented by Carslaw and Jaeger, Mortada, Theis, and others are incorporated in the digital analysis to yield dimensionless pressures for 40 selected dimensionless radius (RD) ratios between 1 and 64 for dimensionless time values of .0005 to 1000.0. A new expression for dimensionless …
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Atuação do profissional da contabilidade frente aos desafios da era digital: um enfoque no Sistema Público de Escrituração Fiscal Digital (SPED)
… aaccountants also emphasized that they consider theis knowledge on the subject satisfactory and that it is essential to train employees in order to have greater reliability of the data.
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A method using drawdown derivatives to estimate aquifer properties near active groundwater production well fields
… component is based on superposition of the Theis solution, although other analytical solutions are also applicable. The observed dataset was judiciously trimmed to reduce computer run-time while retaining enough points to adequately characterize aquifer and well parameters. By limiting …
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Phenomenological Study of Urban Elementary Principals: Reading-Proficient Students with Learning Disabilities
Changes in the demands on educational leaders have necessitated shifts in the roles and responsibilities of school principals. Meeting the needs of students with disabilities is among the critical challenges that administrators face today. The purpose of this study was to examine the lived …
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Conductance of single-electron devices from imaginary-time path integrals
In this thesis we study two nanoscopic systems -- the metallic <br>single electron transistor and semiconductor quantum dots -- which <br>are important models for research on molecular electronics and <br>quantum computing. Our theoretical description is based on a <br>path-integral expression for …
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Children's production of locative expressions in English : the influence of geometric and extra-geometric factors
… spatial terms, the Experiments reported in this theis set out to redress the balance. The research in this thesis demonstrated for the first time that both geometric and extra geometric factors influence the production of children's spatial expressions from an early age. In doing so, however, the …
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Aspectos hidrogeológicos da bacia sedimentar do Rio do Peixe
… específica fractal associada ao modelo de Theis. O resultado das análises realizadas sugere para a BSRP a transmissividade média de 4,66×10-04 m2/s. Na elaboração do balanço hídrico utilizaram-se dados de precipitação e temperatura para um período comum representado por uma série histórica …
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Impact of uncertain input on parameter estimation in groundwater model
… the Matlab Regression Toolbox of the Thiem and Theis model shows that the impact of uncertain drawdown is less than the impact of uncertain pumping. The uncertainty analysis using PEST for a more complex model with a partially penetrating stream shows that the stream depletion cannot be used to …
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The ecological genetics of senescence and stress resistance in Caenorhabditis elegans
… targets of DAF-16. The results presented in this theis suggests that genetic and life history responses to environmental stress deserve a more prominent role in evolutionary studies of aging.
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Polyhedra and algorithms for the General Routing Problem
Das General Routing Problem ist ein auf ungerichteten Graphen definiertes NP-schweres kombinatorisches Optimierungsproblem. Es handelt sich um eine geringfügige Verallgemeinerung des besser bekannten Rural Postman Problem (siehe z.B. Garey & Johnson 1979), zu dem es tatsächlich sowohl theoretisch …
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Incorporating attitudes in airline itinerary choice : modeling the impact of elapsed time
Network airlines traditionally try to minimize the elapsed time of their passengers in connecting travel, based on the assumption that longer elapsed times would make their itinerary less competitive and thus reduce their revenue potential in a given origin destination market. Contrary to the …
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