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Dissertations / Theses on the topic 'Channel modelling'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

MELLO, RODRIGO SILVA. "PLC CHANNEL MODELLING." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=6687@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>O crescente interesse na utilização das redes de distribuição de energia elétrica como uma alternativa para o fornecimento de serviços de telecomunicações, tem motivado a pesquisa e o desenvolvimento de sistemas capazes de superar as características hostis deste ambiente como canal de comunicação. Com esta finalidade, este trabalho procura estimar o comportamento da rede PLC através da modelagem da função de transferência do canal, para a faixa de freqüência de 300 kHz a 30 MHz, por meio de um conjunto de parâmetros, os quais podem

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2

Hopton, Stephen. "Modelling open channel flow." Thesis, University of Nottingham, 2010. http://eprints.nottingham.ac.uk/11594/.

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The study of open channel flow and dam breaking is not a new topic in computational fluid dynamics. However it has only recently started to gain significant attention from researchers using meshless methods, i.e. numerical modelling techniques which do not rely on the use of a mesh to discretise the domain. The research presented here is an attempt to use the meshless method known as smoothed particle hydrodynamics (SPH) to simulate the flow of water down a channel. Hydra, a pre-existing SPH code designed originally for astrophysical simulations, was converted to simulate water flow and then a

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3

Khoo, Soo Hee. "Indoor optical wireless channel modelling." Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393595.

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4

Darbari, Faisal. "Wireless channel modelling for specknet." Thesis, University of Strathclyde, 2008. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21973.

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A wireless sensor network (WSN) consists of spatially distributed autonomous devices using sensors to cooperatively monitor physical or environmental conditions, such as pressure, temperature, sound, vibration or motion at different locations. The development of wireless sensor networks was originally motivated by military applications such as battlefield surveillance. However, wireless sensor retworks are now used in many commercial applications, including environment and habitat monitoring, healthcare applications, home automation, and traffic control. The physical size of these devices is s

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5

Mota, Susana de Jesus. "Channel modelling for MIMO systems." Doctoral thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/14961.

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Doutoramento em Engenharia Electrotécnica<br>Systems equipped with multiple antennas at the transmitter and at the receiver, known as MIMO (Multiple Input Multiple Output) systems, offer higher capacities, allowing an efficient exploitation of the available spectrum and/or the employment of more demanding applications. It is well known that the radio channel is characterized by multipath propagation, a phenomenon deemed problematic and whose mitigation has been achieved through techniques such as diversity, beamforming or adaptive antennas. By exploring conveniently the spatial domain MIMO sys

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6

Cox, C. L. "Modelling channel dynamics and riparian ecology." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598103.

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This study aimed to develop and evaluate a numerical simulation model of the interdependent dynamics of channel form, processes and floodplain vegetation using cellular automaton approaches. The model was developed and evaluated using data from the River Feshie, Scotland. Firstly, field and historic data were examined in order to understand the ecology and dynamic nature of the study site. The braidplain was shown to exhibit a number of different mechanisms of change, varying from a wandering anabranch river to a more fragmented braided pattern; however the relationship between channel pattern

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7

Hicks, C. M. "Modelling of multi-channel audio signals." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.603997.

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This dissertation is concerned with the mathematical modelling of musical and audio signals. The emphasis is on multi-channel signals where either more than one copy of a single original is available for analysis, or where the signal comprises two or more parts. The most common example of this latter class is stereo signals which comprise a left and a right signal to create an auditory illusion of space. Two models are analysed in which we have multiple observations of a single signal. Both are based on the well-known auto-regressive (AR) model which has previously been successfully deployed i

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8

Delis, Anargiros. "Computational modelling of open channel flow." Thesis, University of the West of England, Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244309.

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9

Lin, Min. "Channel modelling for wireless sensor networks." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611656.

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10

Lehner, Andreas. "Multipath channel modelling for satellite navigation systems /." Aachen : Shaker, 2007. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=016152468&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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11

Tan, Bo. "Channel modelling and relay for powerline communications." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/8062.

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The thesis discusses the channel modelling and relay techniques in powerline communications (PLC) which is considered as a promising technology for the Smart Grid communications, Internet access and home area network (HAN). In this thesis, the statistical PLC channel characteristics are investigated, a new statistical channel modelling method is proposed for the in-door PLC. Then a series of the relay protocols are suggested for the broadband communications over power grid. The statistical channel modelling method is proposed to surmount the limits of the traditional deterministic PLC channel

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12

Rainbird, Peter Charles Bruce. "Depth averaged numerical modelling in channel bends." Thesis, University of East Anglia, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317973.

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13

Weng, Jialai. "On advanced channel modelling for network planning." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/22361/.

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With the increasing demand for high speed wireless network services, the next generation wireless networks are proposed to use advanced wireless communication technologies. These technologies include massive MIMO, mmWave and distributed MIMO. In order to deploy wireless networks equipped with these technologies, channel models capturing the channel features and characteristics of these wireless technologies are essential in the planning and optimisation of networks. However, conventional channel models lack the capability to support these next generation network technologies. In this PhD thesi

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14

Pang, Jiayan. "Geological reservoir modelling of fluvial channel sands." Thesis, University of Aberdeen, 1993. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU052787.

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Fluvial channel sandstones form some of the major hydrocarbon reservoirs throughout the world. They are also the most difficult for reservoir geologists and engineers to deal with, because of the variety of sedimentary environments and complex sand body geometries and relationships which directly contribute to the reservoir quality and distributions. Successful geological reservoir modelling of fluvial channel sandstones involves proper understanding of the geological background of the target area, choosing a suitable method for each particular modelling purpose, and making available appropria

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15

Maharaj, Bodhaswar Tikanath Jugpershad. "MIMO channel modelling for indoor wireless communications /." Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-07292008-130655/.

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16

Son, Ill. "Modelling the hydrological effects of land-use change in small catchment." Thesis, University of Southampton, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358382.

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17

Konstatinos, Sasloglou. "Channel measurements and modelling for sensor network applications." Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=12833.

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18

Sun, Yue. "Channel modelling of blood capillary-based molecular communication." Thesis, University of Essex, 2018. http://repository.essex.ac.uk/22451/.

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Molecular communication (MC) is a new and promising interdisciplinary bio-inspired communication paradigm, which uses molecules as information carriers. Differing from traditional communication, MC is proposed as a feasible solution for nanoscale communication with the help of biological scenarios to overcome the communication limitations. Meanwhile, it is inspired by intracellular and intercellular communication, which involves exchange of information through the transmission, propagation, and reception of molecules. Blood capillaries, extensively distributed in the human body and mutually co

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19

Weir, Alexander James. "Channel characterisation and modelling for transcranial Doppler ultrasound." Thesis, Heriot-Watt University, 2016. http://hdl.handle.net/10399/3341.

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The detection of micro-embolic signals (MES) is a mature application of transcranial Doppler (TCD) ultrasound. It involves the identification of abnormally highpitched signals within the arterial waveform as a method of diagnosis and prediction of embolic complications in stroke patients. More recently, algorithms have been developed to help characterise and classify MES using advanced signal processing techniques. These advances aim to improve our understanding of the causes of cereberovascular disease, helping to target the most appropriate interventions and quantifying the risk to patients

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20

MacDonald, Ian. "Analysis and computation of steady open channel flow." Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336664.

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21

Selvarasa, G. (Gowshigan). "Map-based channel model parameterization and comparison of three different deterministic channel modelling methods." Master's thesis, University of Oulu, 2019. http://jultika.oulu.fi/Record/nbnfioulu-201907162704.

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Abstract. The interest in studying the channel characteristics is exponentially increasing with the growth of the communication systems. Various channel modelling approaches have been discussed in the past decades. The ray-tracing based channel models are distinguished from the other channel models as they consider the environmental information and thus are expected to reflect the real propagation phenomena that exist in that specific environment. The goal of this thesis is to study the propagation channel characteristics of the three different channel models. The two deterministic channel mod

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22

McGuinness, James. "Implications of potassium channel heterogeneity for model vestibulo-ocular reflex response fidelity." Thesis, University of Stirling, 2014. http://hdl.handle.net/1893/21844.

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The Vestibulo-Ocular Reflex (VOR) produces compensatory eye movements in response to head and body rotations movements, over a wide range of frequencies and in a variety of dimensions. The individual components of the VOR are separated into parallel pathways, each dealing with rotations or movements in individual planes or axes. The Horizontal VOR (hVOR) compensates for eye movements in the Horizontal plane, and comprises a linear and non-linear pathway. The linear pathway of the hVOR provides fast and accurate compensation for rotations, the response being produced through 3-neuron arc, produ

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23

Broadhurst, Lucy. "Channel form flow resistance in gravel bed rivers." Thesis, University of East Anglia, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267272.

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24

Bhatnagar, Rajeev Mohan. "Modelling and design of a dual channel magnetorheological damper." Thesis, Cranfield University, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/8037.

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A limitation with the current analytical models for predicting the performance of a magnetorheological (MR) damper is that they fail to capture the hysteretic variation of force versus velocity variation correctly. This can significantly underestimate the damper force and overestimate the dynamic range of the device. In this work a transient analytical fluid dynamics model is developed by using a combination of Laplace and Weber transform and Duhamel’s superposition of velocity boundary condition, to overcome these limitations. The solution of the system of nonlinear simultaneous equations, ob

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25

Wadley, Martin Robert. "Modelling the bottom water circulation in the Vema Channel." Thesis, University of East Anglia, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.482778.

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26

Ly, Jim. "Physical Modelling of Pier Scour in a Constricting Channel." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31011.

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Experiments were completed in order to examine the effects of combined constriction and pier scour. Scour is cited as being a leading cause of bridge failure. It was found that in cases where both constriction and pier scour are present, the sum is greater than the linear addition of each individual case. This is contrary to the current industry assumption which states that the total depth of scour is the linear sum of the constriction and pier scour depth. Velocimetry and scour data were collected enabling comparisons to be made in order to determine how the flowfield influences the equilibr

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27

Wang, Zhenyu. "Channel modelling for urban multi-hop/ad hoc networks." Thesis, University of Bristol, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435742.

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28

Sharifi, Soroosh. "Application of evolutionary computation to open channel flow modelling." Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/478/.

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This thesis examines the application of two evolutionary computation techniques to two different aspects of open channel flow. The first part of the work is concerned with evaluating the ability of an evolutionary algorithm to provide insight and guidance into the correct magnitude and trend of the three parameters required in order to successfully apply a quasi 2D depth averaged Reynolds Averaged Navier Stokes (RANS) model to the flow in prismatic open channels. The RANS modeled adopted is the Shiono Knight Method (SKM) which requires three input parameters in order to provide closure, i.e. t

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29

Laurensen, David Irvine. "Indoor radio channel propagation modelling by ray tracing techniques." Thesis, University of Edinburgh, 1994. http://hdl.handle.net/1842/12397.

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In response to the requirement for a more detailed channel model based on the physical characteristics of the environment within which indoor radio communications operate, this thesis presents a channel model based on ray tracing techniques. The mathematical basis for the model is presented in terms of the electromagnetic properties of simple objects. The resulting model is coded into a simulation system which takes a description of a building in terms of the structure of internal walls, floors and ceilings. Through repeated application of the reflection process, a description of the channel i

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30

Konstantinou, Konstantinos. "Low-height channel modelling with application to multihop UMTS." Thesis, University of Surrey, 2008. http://epubs.surrey.ac.uk/843650/.

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Applying the relaying concept to a Code Division Multiple Access (CDMA) mobile network is not a new idea, and many such systems employing relaying capabilities have been suggested. An obstacle to their evaluation with respect to capacity and coverage gains over the conventional non-relaying networks has been the inapplicability of the existent path loss models for low height terminal communications. Herein, empirical propagation models for relaying systems with low height terminals are proposed. The new models consist of line-of-sight and non-line-of-sight branches, and they take into account

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31

Kendall, James D. (James Douglas) 1959 Carleton University Dissertation Engineering Electrical. "Two-dimensional analytical modelling of the short-channel mosfet." Ottawa.:, 1987.

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32

Wu, Shangbin. "Massive MIMO channel modelling for 5G wireless communication systems." Thesis, Heriot-Watt University, 2015. http://hdl.handle.net/10399/2889.

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Massive Multiple-Input Multiple-Output (MIMO) wireless communication systems, equipped with tens or even hundreds of antennas, emerge as a promising technology for the Fifth Generation (5G) wireless communication networks. To design and evaluate the performance of massive MIMO wireless communication systems, it is essential to develop accurate, flexible, and efficient channel models which fully reflect the characteristics of massive MIMO channels. In this thesis, four massive MIMO channel models have been proposed. First, a novel non-stationary wideband multi-confocal ellipse Two-Dimensional (

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33

Sgarabotto, Alessandro. "Modelling the plano-altimetric equilibrium of a tidal channel." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3422836.

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Tidal channels are ubiquitous features of the tidal landscape which play a critical role in the morphodynamic evolution of these landscapes. In addition, tidal channels represent a substantial ecological and economic value, being however vulnerable to climate changes and increasing anthropogenic pressures. Improving current knowledge on tidal channel form and function is therefore key step to model and predict the evolution of tidal systems. A number of studies have analyzed the evolution and equilibrium configuration of tidal channels, focusing on the equilibrium profile of the channel bed f

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34

Terrier, Benoit. "Flow characteristics in straight compound channels with vegetation along the main channel." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6326.

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This study investigates the complex flow structure generated by riparian emergent vegetation along the edge of floodplain. Detailed velocity and boundary shear stress measurements were carried out for various arrangements of emergent rigid cylindric rods of 3 mm, 6 mm and 9 mm diameters and for three different rod densities. In addition, the impact of foliage on the flow field was assessed during a series of experiments where brushes were used instead of smooth rods. The results of these new experiments are first presented. In addition to the laboratory data, field data was obtained through Ac

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35

García, Ariza Alexis Paolo. "Modelling and experimental analysis of frequency dependent MIMO channels." Doctoral thesis, Universitat Politècnica de València, 2009. http://hdl.handle.net/10251/6563.

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La integración de tecnologías de ulta-wideband, radio-cognitiva y MIMO representa una herramienta podersoa para mejorar la eficiencia espectral de los sistemas de comunicación inalámbricos. En esta dirección, nuevas estrategias para el modelado de canales MIMO y su caracterización se hacen necesarias si se desea investigar cómo la frecuencia central y el acho de banda afectan el desempeño de los sistemas MIMO. Investigaciones preliminares han enfocado menos atención en cómo estos parámetros afectan las características del canal MIMO. Se presenta una caracterización del canal MIMO en función de

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36

Hussan, Jagir R. "Modelling the influence of ion channel distributions in cardiac arrhythmias." Thesis, University of Auckland, 2012. http://hdl.handle.net/2292/19263.

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Understanding cardiac electrophysiology in general and the role of ion channels in particular, is a problem of practical significance. Limitations on experimental investigations have necessitated the development of theoretical and computer models. In this thesis, a theoretical perspective informed by published experimental observations and computer modelling tools is adopted. Myocyte organisation and distribution of ion channels in the cardiac ventricular tissue greatly influence its mechanical and electrical behaviour. Computer simulations of these systems are computationally-expensive,

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37

Holmstedt, Elise. "Modelling Transport of Non-Spherical Particles in Small Channel Flow." Doctoral thesis, Luleå tekniska universitet, Strömningslära och experimentell mekanik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60402.

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A model has been developed to predict the movement of oblate and prolate particles on amicro- and nano-scale in laminar channel flow, both for purposes of statistical aggregationand to study motion of single particles. For the purpose of this thesis the model has beenadapted to examine particle deposition patterns in the human lung and the filtration ofparticles during manufacturing of composites, but the possibilities of the model extendto all areas where the particle Stokes and Reynolds numbers are small.To examine the influence the breathing pattern has on the deposition of inhalednano- and

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38

Morrison, Gerald Dale. "Measurement, characterization, and modelling of the indoor radio propagation channel." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq64829.pdf.

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39

Osawe, Maxwell Osayande. "Open channel turbulence modelling using layer-averaged large eddy simulation." Thesis, Queen Mary, University of London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392113.

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40

Kumarapeli, Pushpa. "Modelling the computerised clinical consultations : a multi-channel video study." Thesis, Kingston University, 2011. http://eprints.kingston.ac.uk/22364/.

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This study aims to understand the use of a computer during GP consultations and to enable the development of EPR systems which are easier to review, enter data into, use to take action, and is more sensitive to the clinical context. This thesis reports the development of a multi-channel video and data capture toolkit, the ALFA (Activity Log File Aggregation) because existing observation techniques have limitations. None of the existing tools are designed to assess human-computer interaction in the context of the clinical consultation, where the social interaction is the prime focus. The ALFA t

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41

Neville, Kevin. "Channel attribution modelling using clickstream data from an online store." Thesis, Linköpings universitet, Statistik och maskininlärning, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-139318.

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In marketing, behaviour of users is analysed in order to discover which channels (for instance TV, Social media etc.) are important for increasing the user’s intention to buy a product. The search for better channel attribution models than the common last-click model is of major concern for the industry of marketing. In this thesis, a probabilistic model for channel attribution has been developed, and this model is demonstrated to be more data-driven than the conventional last- click model. The modelling includes an attempt to include the time aspect in the modelling which have not been done i

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42

Lu, Zhihua. "Stochastic modelling of unsteady open channel flow and reliability analysis /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202008%20LU.

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43

Smithson, Allan Geoffrey. "Wide area radio channel modelling across the indoor/outdoor interface." Thesis, University of Bath, 2005. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.423492.

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44

Chaganti, Vasanta Gayatri. "Wireless body area networks : accuracy of channel modelling and prediction." Phd thesis, Canberra, ACT : The Australian National University, 2014. http://hdl.handle.net/1885/150112.

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Toffano, Alberto Antonio <1989&gt. "Protein Modelling Focused on Voltage-Gated Sodium Channel NaV 1.7." Master's Degree Thesis, Università Ca' Foscari Venezia, 2019. http://hdl.handle.net/10579/15049.

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As the state-of-the-art stands at present, it is recognised the narrow correlation between the behavior of voltage-gated sodium channel transmembrane human isoform NaV 1.7 and pain perception . Gain of function mutations are strictly related with several neurophaty (IEM, PEPD). On the other way round, loss of functions are associated with congenital insensivity to pain. Drugs actually avaiable are not able to relief effectively patients with pain disorders. It is thus necessary improve the knowledge in this sense, difficulties in obtaining these informations resides in production and purificat

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46

Finotello, Alvise. "Tidal Channel Patterns: Field Investigations, Numerical Modelling and Laboratory Experiments." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3425863.

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Tidal meandering channels are ubiquitous features of tidal landscapes and play a fundamental role on the eco-morphodynamic evolution of these environments. However, only a handful of papers provide details on tidal meander planimetric shape, morphometric characteristics and morphodynamic evolution, and the internal achitecture of tidal meanders has not been explored in detail. Moreover, the morphodynamic evolution of tidal meanders and the related sedimentary products have often been interpreted on the basis of the well developed models and theories existing for their fluvial counterparts, des

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Greenhill, Rosemary Kate. "An investigation into the mechanisms of compound meandering channel flow." Thesis, University of Bristol, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334230.

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48

Randle, Andrew Martin. "Dynamic radio channel effects from L-band foliage scatter." Thesis, University of York, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341630.

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49

Downham, S. E. "Modelling the two-phase performance of a centrifugal pump." Thesis, Cranfield University, 2000. http://dspace.lib.cranfield.ac.uk/handle/1826/11005.

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A review was carried out which revealed that no simple mathematical model was available which could be used to predict the performance of a centrifugal pump when it is operating under two phase flow conditions. Experimental analyses were carried out to aid the development of such a model. A rotating channel test rig was designed to study the structure of airwater flow through an impeller passageway. The observations generated a large amount of qualitative data. A full scale centrifugal pump was also tested which provided data that allowed the results of the rotating channel experiments to be c

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Mundangepfupfu, Tinotenda Leslie. "Simulation modelling of QoS enhancements in IEEE, 802. 11 networks and the effects of channel modelling." Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/11682.

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