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Dissertations / Theses on the topic 'Modelling'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Singh, Peterson Lila Physics Faculty of Science UNSW. "Modelling secondary organic aerosol formation :from chemical mechanistic modelling to empirical modelling." Awarded by:University of New South Wales. Physics, 2007. http://handle.unsw.edu.au/1959.4/40466.

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The work presented in this thesis is primarily concerned with modelling the formation of secondary organic aerosols (SOAs). SOAs cannot easily be measured with direct analytical chemical methods; indirect methods like applying organic carbon to elemental carbon ratios and utilising computer models have been employed to provide an estimate of the SOA mass concentrations in ambient air. The five models presented in this work were either developed or assessed using environmental chamber data. Chamber experiments were undertaken using initial isoprene concentrations in the range of 22 ppb to 343

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2

Romanowska, Izabela Anna. "Modelling hominin dispersals with agent-based modelling." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/420372/.

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The early dispersals of hominins have been a major focus of Palaeolithic research in the last 50 years. In this dissertation I have applied a formal modelling technique, simulation, to a selection of archaeological research topics concerning hominin dispersals in order to test the suitability of this tool for formal theory development and hypothesis testing. Therefore, the aims of this research are twofold. The archaeological aim is to improve our understanding of hominin dispersals in the Pleistocene, whilst the methodological contribution was achieved by employing a relatively unknown and un

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3

Griesser, Martin Thomas. "The modelling of fabric behaviour for automated modelling." Thesis, University of Hull, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262413.

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4

Tilgner, Hagen 1980. "Modelling splicing." Doctoral thesis, Universitat Pompeu Fabra, 2011. http://hdl.handle.net/10803/85056.

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L’Splicing de les molècules d’ARN és el procés pel qual les seqüències interposades (“introns”) s’eliminen, i les seqüències restants es concatenen per a formar l’ARN madur. La investigació recent mostra que gairebé tots els gens amb splicing es veuen afectats per splicing alternatiu. Aquí, en primer lloc definim la longitud mínima d’un oligomer d’ARN per a funcionar com a lloc d’unió d’un factor d’splicing. A continuació, explorem la capacitat d’aquests oligomers per a predir estructures completes exó-intró. Destaquem els oligomers que són més informatius per a això, i demostrem que l

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5

Spackman, Roger A. "Electrochemical modelling." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316899.

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6

Mackie, Jo. "Situation modelling." Thesis, Lancaster University, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.527167.

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7

Cox, Sander. "Dynamical modelling." Thesis, Uppsala universitet, Tillämpad matematik och statistik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-262477.

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8

Guruprasad, Kunchur. "Protein modelling." Thesis, Birkbeck (University of London), 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283204.

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9

Vaidya, A. M. "Ultrafiltration modelling." Thesis, University of Manchester, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.237688.

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10

Diamantopoulos, Panayiotis. "Biomedical modelling." Thesis, University of Sussex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391860.

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11

Finbow, Gerard Mark. "Modelling nanostructures." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624252.

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12

Ammari-Allahyari, Mojtaba. "Modelling recursion." Thesis, University of Warwick, 2008. http://wrap.warwick.ac.uk/3602/.

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The purpose of my research is to examine and explore the ways that undergraduate students understand the concept of recursion. In order to do this, I have designed computer-based software, which provides students with a virtual and interactive environment where they can explore the concept of recursion, and demonstrate and develop their knowledge of recursion through active engagement. I have designed this computer-based software environment with the aim of investigating how students think about recursion. My approach is to design digital tools to facilitate students' understanding of recursio

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13

Roseburgh, David Stewart. "Epioptical modelling." Thesis, University of Edinburgh, 2006. http://hdl.handle.net/1842/14327.

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We have modelled epioptic systems using semi-empirical methods. We apply one such theoretical technique, Berreman’s 4x4 matrix formalism, to simulate and compare the results of various epioptic spectroscopies when applied to model systems. We place particular emphasis on 45° reflectivity spectroscopy (45DR), and demonstrate its potential for the study of systems with surface regions of mixed isotropic and anisotropic character. We also demonstrate the superior surface senstiviity of 45DR when compared to spectroscopic ellipsometry (SE) and show that 45DR is inherently more stable with regards

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14

Cole, Ian R. "Modelling CPV." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/18050.

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A methodology for the simulation of CPV systems is presented in four distinct sections: input, optics, uncertainty and electrical output. In the input section, existing methods of describing the solar irradiation that is incident at the primary optical element of a CPV system are discussed, the inadequacies of the existing methods are explored and conditions of validity for their use drawn. An improved and spectrally extended model for a variable, spatially resolved solar image is arrived at. The model is used to analyse losses at the primary concentration device stage under varying solar prof

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15

Hebeler, Felix. "Modelling topographic uncertainty : impacts on large scale : environmental modelling /." Zürich, 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000253809.

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16

Headey, Jonathan Mark. "Modelling of river corridors : modelling urban particulate transport processes." Thesis, University of Birmingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289714.

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17

Wang, Wang. "Empirical Investigations of Conceptual Modelling and the Modelling Process." Thesis, Lancaster University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.518147.

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18

Kjellsdotter, Frida. "MBS-modelling of a heavy truck : Modelling and model validation." Thesis, KTH, Fordonsdynamik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-32076.

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As a result of the accelerating demands for faster development within the heavy vehicle industry, computer aided simulations have become a more important tool in the development process. Simulations can offer faster evaluation of loads acting on the vehicle and more cost effective fatigue life predictions than physical testing, since physical prototypes are not needed for load measurements or fatigue tests. However, accurate fatigue life predictions without physical verification are today a difficult task with many uncertainties, yet simulations are still an important part of modern product de

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19

Strathern, M. "Modelling Organisational Evolution and Change - a Complex Systems Modelling Perspective." Thesis, Cranfield University, 2008. http://hdl.handle.net/1826/3527.

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The cumulative output of these papers emphasise that modelling organisational evolution and change from a complex systems perspective makes a significant contribution to organisational studies and brings new insight and understandings both to theory and practice. It is also true that the studies and modelling presented in these papers has pushed forward the boundaries of complex systems science, again both in theory and practice. The papers have made new findings and understandings of the processes, drivers and outcomes of the evolution of social systems and organisations through the developme

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20

Lu, Zhengxin. "Modelling geotechnical uncertainty using numerical modelling techniques : Kuldip Narbheshankar Modha." Thesis, University of Nottingham, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.446386.

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21

Meng, Xuesong. "Modelling multi-scale problems in the transmission line modelling method." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/14461/.

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Modern electromagnetic problems are becoming increasingly complex and their simulation must take into account geometrical features that are both large and small compared to the wavelength of interest. These multi-scale problems lead to a heavy computational burden in a discretised computational simulation approach since the small features require fine mesh to be used in the simulation, resulting in large run time and memory storage. To overcome such problems, this thesis presents an efficient and versatile method for embedding small features into an otherwise coarse mesh. The embedded model el

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22

Gebrehiwet, Yemane Fisseha. "Modelling agricultural input expenditure in a multi-market modelling framework." Thesis, University of Pretoria, 2010. http://hdl.handle.net/2263/25139.

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Agricultural input expenditures have not been widely incorporated in most partial equilibrium models. Thus, investigating the effect of economic policies and other exogenous factors on the agricultural sector will produce only a partial analysis, since the simultaneous impact of these factors on input expenditures is excluded. This study, therefore, extends the existing partial equilibrium multi-market model of the South African agricultural sector (BFAP model) by incorporating agricultural input expenditure. Thus, the analysis of the impact of economic policies on the agricultural sector, whi

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23

Deshmukh, Pushkaraj M. "Modelling error estimation and adaptive modelling of functionally graded materials." Cincinnati, Ohio : University of Cincinnati, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=ucin1096036755.

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24

Nilsson, Cecilia. "Modelling of Dynamically Loaded Shotcrete." Thesis, KTH, Betongbyggnad, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-36923.

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25

Brignoni, Jimmy. "Modelling transfer processes /." [S.l.] : [s.n.], 2009. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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26

Lamberti, Giuseppe. "Modelling with heterogeneity." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/309295.

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When collecting survey data for a specific study it is usual to have some background information, in the form for example, of socio-demographic variables. In our context, these variables may be useful in identifying potential sources of heterogeneity. Resolving the heterogeneity may mean to perform distinct analyses based on the main variables for distinct and homogeneous segments of the data, defined in terms of the segmentation variables. In 2009 Gastón Sánchez proposed an algorithm PATHMOX with the aim to automatic detecting heterogeneous segments within the PLS-PM methodology. This techniq

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27

Larsson, Johan. "Modelling a memory." Thesis, Linköping University, Department of Electrical Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1028.

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<p>The purpose of this master thesis is to describe the work behind the building of a scalable model of a memory designed at Zarlink Semiconductor AB. This model is to be part of a memory generator and used to extract timing parameters for all available memory sizes instead of simulating the layout, as layout simulation takes too much time. </p><p>The report starts with the basic theory of passive circuit elements that has to be considered in a model and what effect these elements have on functionality and robustness of the design. There’s also a short chapter on how to layout for optimisation

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28

Björklund, Oscar. "Modelling of failure." Thesis, Linköping University, Department of Management and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11466.

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<p>This report is a review of some failure models today used for determine failure in thin sheets of high strength steels. Focus has been given on phenomenlogical models and only some simple simulations have been carried out. The phenomenlogical models that have been summarized here are of four different categories, namely stress based, strain based, combined stress and strain based and damaged models. However, the simulations have only been preformed for some of the models.</p>

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29

Meier, Stefanie. "Identifying Modelling Tasks." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-80629.

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The Comenius Network Project “Developing Quality in Mathematics Education II” funded by the European Commission consists of partners from schools, universities and teacher training centres from eleven European countries. One advantage of the project is the mutual exchange between teachers, teacher trainers and researchers in developing learning material. To support the teachers most effectively the researchers asked the teachers what they wanted the researchers to do. The answer was also a question: How can we identify (good) modelling tasks? A discussion ensued in the research group of this p

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30

Ozkan, Erhun. "Stochastic Inventory Modelling." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12612097/index.pdf.

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In this master thesis study, new inventory control mechanisms are developed for the repairables in Nedtrain. There is a multi-item, multi echelon system with a continuous review and one for one replenishment policy and there are different demand supply options in each control mechanism. There is an aggregate mean waiting time constraint in each local warehouse and the objective is to minimize the total system cost. The base stock levels in each warehouse are determined with an approximation method. Then different demand supply options are compared with each other.

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31

Brännström, Åke. "Modelling animal populations." Doctoral thesis, Umeå universitet, Matematik och matematisk statistik, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-205.

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This thesis consists of four papers, three papers about modelling animal populations and one paper about an area integral estimate for solutions of partial differential equations on non-smooth domains. The papers are: I. Å. Brännström, Single species population models from first principles. II. Å. Brännström and D. J. T. Sumpter, Stochastic analogues of deterministic single species population models. III. Å. Brännström and D. J. T. Sumpter, Coupled map lattice approximations for spatially explicit individual-based models of ecology. IV. Å. Brännström, An area integral estimate for higher order

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32

Sprague, Daniel Alexander. "Modelling health behaviour." Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/77458/.

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Many diseases can be prevented or mitigated through behaviour change, but we lack a quantitative model that can accurately predict these changes and inform policies designed to promote them. Here we introduce a quantitative model of health behaviour that takes into account individual-level barriers, the health system, and spread between individuals. We investigate limits of the model where each of these determining factors is dominant, and use them to predict behaviour from data. We apply the model to individual-level geographic barriers to mothers giving birth in a health facility, and find e

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33

Sheikh, Irfan. "Modelling power prices." Thesis, Imperial College London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.529355.

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34

Yeung, William Wai-Hung. "Modelling stalled airfoils." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/31120.

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The thesis deals with some new applications of the wake source model, a two-dimensional incompressible potential flow model used for bodies experiencing flow separation. The body contour is conformally mapped to a circle, for which the flow problem is solved using source singularities to create free streamlines simulating the separating shear layers. In common with other inviscid theories, it generally requires the pressure in the separated flow region, and the location of separation if boundary-layer controlled. Different mapping sequences and flow models have been constructed for the follow

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35

Lewis-Bowen, J. "Modelling grid architecture." Thesis, University College London (University of London), 2007. http://discovery.ucl.ac.uk/1445669/.

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This thesis evaluates software engineering methods, especially event modelling of distributed systems architecture, by applying them to specific data-grid projects. Other methods evaluated include requirements' analysis, formal architectural definition and discrete event simulation. A novel technique for matching architectural styles to requirements is introduced. Data-grids are a new class of networked information systems arising from e-science, itself an emergent method for computer-based collaborative research in the physical sciences. The tools used in general grid systems, which federate

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36

Mickael, Michel Edwar Khalil. "Modelling baroreceptors function." Thesis, Durham University, 2012. http://etheses.dur.ac.uk/3901/.

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Cardiovascular diseases form one of the most dangerous events that affect human life. They are usually the result of high blood pressure. Thus controlling blood pressure within patient specific healthy limits is a goal that we must target. There are two control loops for blood haemostasis inside the body either long term or short term. Baroreceptors control the short term blood pressure regulation. They are nerve endings that exist in certain locations within the blood vessel walls and they report blood pressure into the brain and the central nervous system. However the basics of their functio

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37

Robbins, Lynda E. "Modelling cryptographic systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ31163.pdf.

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38

Bredenberg, Johan. "Modelling biomolecular interactions /." Stockholm, 2003. http://diss.kib.ki.se/2003/91-7349-571-9.

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39

Hutcheson, Kenneth Andrew. "Geomagnetic field modelling." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385503.

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40

Leith, Miguel Francis. "Modelling linguistic events." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299691.

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41

Marchant, Ben. "Modelling cell invasion." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365294.

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42

HoÌˆfer, Thomas. "Modelling Dictyostelium aggregation." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320227.

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43

Hall, R. J. "Modelling fungicide resistance." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.599864.

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Fungicide resistance, whereby a mutation conferring reduced sensitivity to chemical control arises and spreads through a fungal population, severely inhibits the successful control of crop disease. Mathematical models play a vital role in assessing the risk of invasion of fungicide-resistant pathogens, and in the design of effective resistance management strategies. In this thesis, I investigate the factors affecting the invasion of resistance in heterogeneous crop environments. I develop a simple, nonlinear model for fungicide resistance which, improving on existing work, incorporates the dyn

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44

Biswas, P. "Inclusive user modelling." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596672.

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I have investigated how physical capabilities of users with a wide range of abilities are reflected in their interactions with digital devices. I have formulated a simulator that embodies both the internal state of a computer application and also the perceptual, cognitive and motor processes of its user. The simulator can predict the likely interaction patterns when undertaking a task using a variety of input devices, and estimate the time to complete the task in the presence of different disabilities and for different levels of skill. The simulator consists of a perception model, a cognitive

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45

Tse, Jonathan. "Market microstructure modelling." Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540272.

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46

Bennett, Donald John. "Semiconductor process modelling." Thesis, University of the West of Scotland, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259677.

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47

Axt, Konstantin. "Modelling pre-rRNA." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7746.

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In this project rRNA maturation was investigated with the help of mathematical models of processing pathways from pre-rRNA to mature rRNA species. Previously described models were transferred from Excel to Mathematica. Additionally, two Mathematica based software applications were created, which help to analyse metabolic [3H]-Uracil labelling of pre-rRNA species. The first program, M Fit helps to visualize dependencies in the pre-rRNA processing. The other program S Fit tries to find a best fit of the model response to labelling time course data, hence optimizing parameter values. To validate

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48

Crapper, Martin. "Fluid mud modelling." Thesis, University of Liverpool, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318237.

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49

Morrell, Kevin. "Modelling employee turnover." Thesis, Loughborough University, 2002. https://dspace.lboro.ac.uk/2134/6794.

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This thesis reports the first independent test of an influential model of employee turnover (Lee, Mitchell, Holtom, McDaniel and Hill 1999). The context for this test is the case of nurse turnover in the National Health Service (NHS). There have been many hundreds of turnover studies in the last fifty years, and many ways of understanding the turnover phenomenon. The thesis organises this literature, by selectively analysing and discussing the more influential of these studies. This selective, critical review allows for the model tested here to be placed in a theoretical and historical context

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50

Tighe, Stephen Patrick. "Macroscopic dislocation modelling." Thesis, University of Oxford, 1992. http://ora.ox.ac.uk/objects/uuid:e4f00d59-71b0-43c0-b141-0bb7e6108fff.

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Work-hardened metals typically possess large numbers of dislocations in complex three-dimensional configurations about which little is known theoretically. Here these large numbers of dislocations are accounted for by means of a dislocation density tensor, which is obtained by applying an averaging process to families of discrete dislocations. Some simple continuous distributions are examined and an analogy is drawn with solenoids in electromagnetism before the question of the equilibrium of dislocation configurations is studied. It is then proved that the only finite, simply-connected distrib

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