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Dissertations / Theses on the topic 'Model the dynamic dimension'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Nasekin, Sergey. "Dynamic dimension reduction for financial applications." Doctoral thesis, Humboldt-Universität zu Berlin, Wirtschaftswissenschaftliche Fakultät, 2017. http://dx.doi.org/10.18452/17696.

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In den letzten Jahren gab es ein drastisches Wachstum in verfügbaren Finanzdaten. Finanzmärkte haben starke und oft nicht ganz vorhersagbare Änderungen ihrer Dynamik erlebt. Diese Tendenz hat dazu geführt, dass die Methoden der Risikomodellierung sowohl das Problem der hohen Dimensionalität als auch dynamische nicht Gaußsche Strukturen behandeln müssen. Das Ziel dieser Dissertation ist es, Methoden der Risikomodellierung vorzuschlagen, die gleichzeitig Reduzierung der Dimensionalität und dynamische Struktur in drei Anwendungen erlauben: 1) Asset Allocation und Hedging, 2) stochastische Mode

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2

Harwood, Thomas David. "Dynamic three-dimensional plant-microclimate simulation model 'Ecospace'." Thesis, University of Edinburgh, 1996. http://hdl.handle.net/1842/10946.

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Growing plants modify the microclimate within which they grow by altering their physical structure. Thus individuals affect the subsequent growth of both themselves and competing neighbours. It is important that this feedback be represented in a model of dynamic vegetation change. A flexible generalised model "Ecospace" is presented, which was designed to be applicable to all terrestrial vegetation. The model uses a three-dimensional grid of hexagonal tiles to represent space above and below ground. Each individual plant may occupy one or more tiles within the grid. Any number of individuals m

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3

Schmid, Frank. "Essays on the large dimensional approximate dynamic factor model /." Berlin : dissertation.de, 2009. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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4

Schmid, Frank. "Essays on the large dimensional approximate dynamic factor model." Berlin dissertation.de, 2008. http://d-nb.info/999361538/04.

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5

Lindau, Jules Washington. "Multidimensional dynamic compression system modeling." Diss., This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-02132009-171914/.

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6

Eaton, Jeffery P. "Analysis of the effects of dynamic characteristic dimension calculations on FLIR performance prediction models." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA331245.

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7

Grierson, Yvonne Martha. "A three-dimensional whole body model for dynamic motion analysis." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12768.

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8

Tie, XueXi. "A three-dimensional global dynamical and chemical model of methane." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/30885.

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9

Gurung, Tshering T. "One-Dimensional Dynamic Modeling of the Lower Mississippi River." ScholarWorks@UNO, 2014. http://scholarworks.uno.edu/td/1804.

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The Mississippi River (MR) has been engineered with the development of the levee system, dams for flood control measures, jetties, revetments and dredging of the navigation channel. These alterations have reduced the replenishment of the sediment to the Louisiana Coastal area. To aid in the restoration planning, 1-D numerical models have been calibrated and validated to predict the river response to various changes such as channel modifications, varied flow conditions and hurricane situations. This study utilized the HEC-RAS 4.1 and the CHARIMA (Dr. Forrest Holly, University of Iowa). The mode

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10

Safari, Katesari Hadi. "BAYESIAN DYNAMIC FACTOR ANALYSIS AND COPULA-BASED MODELS FOR MIXED DATA." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/dissertations/1948.

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Available statistical methodologies focus more on accommodating continuous variables, however recently dealing with count data has received high interest in the statistical literature. In this dissertation, we propose some statistical approaches to investigate linear and nonlinear dependencies between two discrete random variables, or between a discrete and continuous random variables. Copula functions are powerful tools for modeling dependencies between random variables. We derive copula-based population version of Spearman’s rho when at least one of the marginal distribution is discrete. In

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11

Hardikar, Rahul Padmakar. "Dynamic electron-phonon interactions in one-dimensional models." Diss., Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-11092007-143010.

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12

Rinder, Maria M. "Three-dimensional dynamic biomechanical model for lifting and lowering activities systematic review, critical appraisal and model development /." Cincinnati, Ohio University of Cincinnati, 2007. http://www.ohiolink.edu/etd/view.cgi?ucin1179430261.

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Thesis (M.S.)--University of Cincinnati, 2007.<br>Title from electronic thesis title page (viewed July 14, 2007). Includes abstract. Keywords: biomechanical model, spinal load, compression force, manual lifting Includes bibliographical references.

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RINDER, MARIA M. "Three-Dimensional Dynamic Biomechanical Model for Lifting and Lowering Activities: Systematic Review, Critical Appraisal and Model Development." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1179430261.

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14

Ohta, Takumi. "Theoretical study of entanglement and dynamical properties of topological phases of Majorana fermions in one dimension." Kyoto University, 2018. http://hdl.handle.net/2433/232224.

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15

Liu, Min. "A Three-Dimensional Hyper-Viscoelasticity Constitutive Model for the Dynamic Response of Rubber." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1185546966.

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16

Liu, Hua. "A study of the cutting performance in abrasive waterjet contouring of alumina ceramics and associated jet dynamic characteristics." Thesis, Queensland University of Technology, 2004. https://eprints.qut.edu.au/16110/1/Hua_Liu_Thesis.pdf.

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Abrasive waterjet (AWJ) cutting is one of the most recently developed nontraditional manufacturing technologies. It has been increasingly used in industry owing to its various distinct advantages over the other cutting technologies. However, many aspects of this technology require to be fully understood in order to increase its capability and cutting performance as well as to optimize the cutting process. This thesis contains an extensive literature review on the investigations of the various aspects in AWJ machining. It shows that while considerable work has been carried out, very little r

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Liu, Hua. "A Study of the Cutting Performance in Abrasive Waterjet Contouring of Alumina Ceramics and Associated Jet Dynamic Characteristics." Queensland University of Technology, 2004. http://eprints.qut.edu.au/16110/.

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Abrasive waterjet (AWJ) cutting is one of the most recently developed nontraditional manufacturing technologies. It has been increasingly used in industry owing to its various distinct advantages over the other cutting technologies. However, many aspects of this technology require to be fully understood in order to increase its capability and cutting performance as well as to optimize the cutting process. This thesis contains an extensive literature review on the investigations of the various aspects in AWJ machining. It shows that while considerable work has been carried out, very little rep

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18

Tate, Angela J. "Validation of a dynamic three-dimensional link segment model of a working pregnant woman." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ63377.pdf.

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19

FILIPPI, MATTEO. "A variable kinematic one-dimensional model for aeroelasticity and dynamic analysis of multi-layered rotors." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2615482.

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Flutter is one of the most known instability phenomena. This condition occurs when a given structure exhibits sustained, harmonic oscillations, sometimes leading to catastrophic events. The prediction of flutter represents a crucial point for a correct and safe design. When fluid structure interactions produce dynamic instability, flutter analyses require accurate descriptions of body deformations and aerodynamic loads. To this end, aerodynamic theories have been coupled with structural models to develop aeroelastic analysis tools, whose reliability is the results of a trade-off between the ac

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Christenson, Michael P. "Black Spaghetti: A Numerical Model of Gravitational Collapse in 4 + 1 Spacetime." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd907.pdf.

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21

Gokdemir, Cagri. "A three dimension hyporheic model of the River Bure : understanding the nutrient dynamics and the role of streambed heterogeneity." Thesis, Queen Mary, University of London, 2015. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8185.

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The hyporheic zone is often de fined as the zone where mixing of surface water and groundwater occurs in shallow sediments beneath and adjacent to rivers. This mixing contributes to create unique biogeochemical conditions that may attenuate contaminants from either upstream surface water or groundwater under gaining and losing conditions. Hyporheic exchange results from di erences in the channel near-bed head as it varies in space in response to interactions between surface flow and bed topography, with the interaction with the water table playing an important role too. Reactions of contaminan

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Gokdemir, Cagri. "A three dimension hyporheic model of the River Bure: Understanding the nutrient dynamics and the role of streambed heterogeneity." Doctoral thesis, Università degli studi di Trento, 2014. https://hdl.handle.net/11572/367956.

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The hyporheic zone is often defined as the zone where mixing of surface water and groundwater occurs in shallow sediments beneath and adjacent to rivers. This mixing contributes to create unique biogeochemical conditions that may attenuate contaminants from either upstream surface water or groundwater under gaining and losing conditions. Hyporheic exchange results from differences in the channel near-bed head as it varies in space in response to interactions between surface flow and bed topography, with the interaction with the water table playing an important role too. Reactions of contamin

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23

Gokdemir, Cagri. "A three dimension hyporheic model of the River Bure: Understanding the nutrient dynamics and the role of streambed heterogeneity." Doctoral thesis, University of Trento, 2014. http://eprints-phd.biblio.unitn.it/1384/1/PhD_Thesis_CG.pdf.

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The hyporheic zone is often defined as the zone where mixing of surface water and groundwater occurs in shallow sediments beneath and adjacent to rivers. This mixing contributes to create unique biogeochemical conditions that may attenuate contaminants from either upstream surface water or groundwater under gaining and losing conditions. Hyporheic exchange results from differences in the channel near-bed head as it varies in space in response to interactions between surface flow and bed topography, with the interaction with the water table playing an important role too. Reactions of contamin

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24

Imhauser, Carl William Siegler Sorin. "Development and evaluation of a 3-dimensional, image-based, patient-specific, dynamic model of the hindfoot (The) /." Philadelphia, Pa. : Drexel University, 2004. http://dspace.library.drexel.edu/handle/1860/332.

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25

Carlson, Shane A. "Development of a Variational Part Model Using In-Process Dimensional Measurement Error." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1341.pdf.

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Sainte-Marie, Nina. "A transmission-error-based gear dynamic model : Applications to single- and multi-mesh transmissions." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI133/document.

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Les spectres de bruit mesurés en cabine d’hélicoptère montrent que la boîte de transmission principale (BTP) est un des principaux contributeurs au bruit perçu par les usagers. Elle génère en effet plusieurs raies émergeant fortement du bruit large bande et dont les fréquences se situent dans la plage de sensibilité maximale de l’oreille humaine. Dans un contexte d’amélioration permanente du confort acoustique des usagers, un modèle numérique est développé pour prédire le comportement dynamique des BTP. Les équations du mouvement sont écrites sur la base de fonctions du temps représentatives d

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27

Martins, Carlos Eduardo Nogueira. "Utilização de modelo matemático na busca do manejo sustentável das pastagens naturais." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/4323.

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The objective was to model on a scale spatiotemporal dynamics of rangeland vegetation types characterized by functional when subjected to different disorders, aiming to predict patterns in the vegetation inventory for future analysis of the fractal dimension associated with the model of cellular automata. So, initially evaluated the use of fractal analysis as a tool to determine patterns in a reduced scale of grazing on natural pastures under different managements. The experiment evaluated the effect of grazing and burning disturbances applied in two relief positions in a natural grassland loc

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Kenney, Peter Martin. "An Initial Study to Determine a Friction-Factor Model for Ground Vegetation." Connect to full text in OhioLINK ETD Center, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=toledo1264706279.

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Dissertation (Ph.D.)--University of Toledo, 2009.<br>Typescript. "Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Engineering." Bibliography: leaves 51-53.

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29

Abdelghani, Wafa. "A multi-dimensional trust-model for dynamic, scalable and resources-efficient trust-management in social internet of things." Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30231.

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L'internet des Objets (IoT) est un paradigme qui a rendu les objets du quotidien, intelligents en leur offrant la possibilité de se connecter à Internet, de communiquer et d'interagir. L'intégration de la composante sociale dans l'IoT a donné naissance à l'Internet des Objets Social (SIoT), qui a permis de surmonter diverse problématiques telles que l'interopérabilité et la découverte de ressources. Dans ce type d'environnement, les participants rivalisent afin d'offrir une variété de services attrayants. Certains d'entre eux ont recours à des comportements malveillants afin de propager des se

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30

Knapik, Gregory George. "A three-dimensional, EMG-assisted, push-pull model for assessing dynamic loads on each level of the lumbar spine." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1413371466.

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31

Douros, Ioannis. "Towards a 3 dimensional dynamic generic speaker model to study geometry simplifications of the vocal tract using magnetic resonance imaging data." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0115.

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Dans cette thèse, nous avons utilisé les données de l’IRM du conduit vocal pour étudier la production de la parole. La première partie consiste en l’étude de l’impact que le vélum, l’épiglotte et la position de la tête a sur la phonation de cinq voyelles françaises. Des simulations acoustiques ont été utilisées pour comparer les formants des cas étudiés avec la référence afin de mesurer leur impact. Pour cette partie du travail, nous avons utilisé des IRM statiques en 3D. Comme la parole est généralement une phénomène dynamique une question s’est posée, à savoir s’il serait possible de traiter

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PAGANI, ALFONSO. "Component-wise models for static, dynamic and aeroelastic analyses of metallic and composite aerospace structures." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2598370.

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In the framework of structural mechanics, the classical beam theories that are commonly adopted in many applications may be affected by inconsistencies, because they are not able to foresee higher-order phenomena, such as elastic bending/shear couplings, restrained torsional warping and 3D strain effects. Depending on the problem, those limitations can be overcome by using more complex and computationally expensive 2D and 3D models or, alternatively, by adopting refined beam models, to which many scientists have dedicated their research over the last century. % One of the latest contributio

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Carrier, Michel. "Comportement dynamique des poutres composites a section quelconque : etude par elements finis correspondants." Toulouse 3, 1988. http://www.theses.fr/1988TOU30085.

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Element fini monodimensionnel, prenant en compre: heterogeneite, couplages elastiques et dynamiques dus a la non-coincidence des centres de torsion, de masse et elastique, et le gauchissement (effets secondaires). Notion de parametres integraux, equilibre ou interviennent les coefficients de cisaillement. Logiciel pour l'analyse modale des frequences de vibration d'une poutre libre-libre; comparaison a experiences menees en parallele et extension au cas de poutres a phases orthotropes, un axe etant confondu avec celui de la poutre

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Бурик, І. Є., Андрій Володимирович Павлов, Андрей Владимирович Павлов та Andrii Volodymyrovych Pavlov. "Метод урахування динамічних габаритів транспортних одиниць при моделюванні процесів руху міського транспорту". Thesis, Видавництво СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/10397.

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Yuan, Miao. "Corporate Default Predictions and Methods for Uncertainty Quantifications." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/81905.

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Regarding quantifying uncertainties in prediction, two projects with different perspectives and application backgrounds are presented in this dissertation. The goal of the first project is to predict the corporate default risks based on large-scale time-to-event and covariate data in the context of controlling credit risks. Specifically, we propose a competing risks model to incorporate exits of companies due to default and other reasons. Because of the stochastic and dynamic nature of the corporate risks, we incorporate both company-level and market-level covariate processes into the event in

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VARELLO, ALBERTO. "Advanced higher-order one-dimensional models for fluid-structure interaction analysis." Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2517517.

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The aim of this work is the development of a refined reduced order model suitable for numerical applications in solid and fluid mechanics with a remarkable reduction in computational cost. Nowadays, numerical reduced order models are widely exploited in many areas, such as aerospace, mechanical and biomechanical engineering for structural analysis, fluid dynamic analysis and coupled (aeroelastic) fluid-structure interaction analysis. One-dimensional (1D) structural models, commonly known as beams, are for instance used in many applications to analyze the structural behavior of slender bodies,

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Long, Fei. "Three-Dimensional Motion Control and Dynamic Force Sensing of a Magnetically Propelled Micro Particle Using a Hexapole Magnetic Actuator." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1452093964.

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Al-nasur, Sadeq J. "New Models for Crowd Dynamics and Control." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/30107.

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In recent years, there has been an increasing interest in modeling crowd and evacuation dynamics. Pedestrian models are based on macroscopic or microscopic behavior. In this work, we are interested in developing models that can be used for evacuation control strategies. Hence, we use macroscopic modeling approach, where pedestrians are treated in an aggregate way and detailed interactions are overlooked. In this dissertation, we developed two-dimensional space crowd dynamic models to allow bi-directional low by modifying and enhancing various features of existing traffic and fluid dynamic mode

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Akah, Ebiji Anthony. "Experimental and Analytical Collapse Evaluation of an Existing Building." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437620552.

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Al-Ani, Jonathan. "Development of a Nordic BWR plant model in APROS and design of a power controller using the control rods." Thesis, KTH, Fysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-289560.

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In this master thesis an input-model of a Nordic BWR power plant has been developed in APROS. The plant model contains key systems and major thermohydraulic components of the steam cycle, including I&C systems (i.e. power, pressure, level and flow controls). The plant model is primarily designed for balance of plant studies at discrete power levels. The input-model of the power plant focuses especially on the steam cycle which is crucial for analysing water and steam behaviour and its influence on the reactor power. At the current stage, the model primarily handles steady-state conditions

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Assmann, Felipe Pinheiro Mota. "Modelagem din?mica do escoamento de um sistema de eleva??o por plunger lift." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15691.

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Made available in DSpace on 2014-12-17T14:58:17Z (GMT). No. of bitstreams: 1 FelipePMA_DISSERT.pdf: 3715487 bytes, checksum: 630bbbaabad6ec787270701f99c61fb0 (MD5) Previous issue date: 2012-04-18<br>A critical problem in mature gas wells is the liquid loading. As the reservoir pressure decreases, gas superficial velocities decreases and the drag exerted on the liquid phase may become insufficient to bring all the liquid to the surface. Liquid starts to drain downward, flooding the well and increasing the backpressure which decreases the gas superficial velocity and so on. A popular method to

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Srinivasan, Sujatha. "Low-dimensional modeling and analysis of human gait with application to the gait of transtibial prosthesis users." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1179865923.

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Lopes, Gabriela Cantarelli. "Desenvolvimento de modelo numerico tridimensional e eliptico para o estudo de escoamentos no interior de dutos cilindricos." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266262.

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Orientador: Jose Roberto Nunhez<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-11T08:15:27Z (GMT). No. of bitstreams: 1 Lopes_GabrielaCantarelli_M.pdf: 1710566 bytes, checksum: efab0c6308734536b15c2ef91d4d8337 (MD5) Previous issue date: 2008<br>Resumo: Processos que envolvem escoamentos de fluidos no interior de dutos estão presentes em muitas aplicações industriais. Na indústria petroquímica um desses processos que vem se tornando cada vez mais importante é o craqueamento catalítico de frações pesadas do

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Vodola, Davide. "Correlations and quantum dynamics of 1D fermionic models : new results for the Kitaev chain with long-range pairing." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAF007/document.

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La première partie de la thèse étudie le diagramme de phase d’une généralisation de la chaîne de Kitaev qui décrit un système fermionique avec un pairing p-wave à long rayon qui tombe avec la distance ℓ comme 1/ℓα. On a analysé les lignes critiques, les corrélations et le comportement de l’entropie d’entanglement avec la taille du système. Nous avons démontré l’existence de deux régimes massifs, (i) où les fonctions de corrélation tombent exponentiellement à de courtes distances et comme puissance à de longues distances (α > 1), (ii) où elles tombent à puissance seuleme

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Cantin, Guillaume. "Étude de réseaux complexes de systèmes dynamiques dissipatifs ou conservatifs en dimension finie ou infinie. Application à l'analyse des comportements humains en situation de catastrophe." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMLH16/document.

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Cette thèse est consacrée à l'étude de la dynamique des systèmes complexes. Nous construisons des réseaux couplés à partir de multiples instances de systèmes dynamiques déterministes, donnés par des équations différentielles ordinaires ou des équations aux dérivées partielles de type parabolique, qui décrivent un problème d'évolution. Nous étudions le lien entre la dynamique interne à chaque nœud du réseau, les éléments de la topologie du graphe portant ce réseau, et sa dynamique globale. Nous recherchons les conditions de couplage qui favorisent une dynamique globale particulière à l'échelle

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Phan, Quang. "Weak factor model in large dimension." Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/69442/.

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This thesis presents some extensions to the current literature in high-dimensional static factor models. When the cross-section dimension (represented by N hence-forth) is very large, the standard assumption for each common factor is to have the number of non-zero loadings grow linearly with N . On the other hand, an idiosyncratic error for each component can only be correlated with a finite number of other components in the cross-section. These two assumptions are crucial in standard high-dimensional factor analysis, as they allow us to obtain consistent estimators for the factors, the loadin

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Kuklik, Robert G. "Capital Asset Prices Modelling - Concept VAPM." Doctoral thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-196945.

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The key objective of this thesis is the outline of an alternative capital market modeling framework, the Volatility Asset Pricing Model, VAPM, inspired by the innovative dual approach of Mandelbrot and Hudson using the method based on synthesis of two seemingly antagonistic factors -- the volatility of market prices and their serial dependence determining the capital markets' dynamics. The pilot tests of this model in various periods using the market index as well as a portfolio of selected securities delivered generally satisfactory results. Firstly, the work delivers a brief recapitulation r

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De, Toni Stefano. "A two-dimensional model for the dynamics of granular avalanches." Doctoral thesis, Università degli studi di Trento, 2005. https://hdl.handle.net/11572/369168.

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Zoning of avalanche risk areas is one important task of land-use planning in alpine areas. The lack of records, due to the low frequency of these events, makes it di cult to implement a statistical analysis. Simulations made with physical and mathematical models can improve the knowledge of the dynamics of these events. In this thesis three di different mathematical and numerical models, based on the rheological theory of Savage and Hutter for granular flows, are introduced. A one dimensional model with variable width, written in a curvilinear coordinate system, has been developed. New rheolog

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De, Toni Stefano. "A two-dimensional model for the dynamics of granular avalanches." Doctoral thesis, University of Trento, 2005. http://eprints-phd.biblio.unitn.it/609/3/StefanoDeToni2005.pdf.

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Zoning of avalanche risk areas is one important task of land-use planning in alpine areas. The lack of records, due to the low frequency of these events, makes it dicult to implement a statistical analysis. Simulations made with physical and mathematical models can improve the knowledge of the dynamics of these events. In this thesis three didifferent mathematical and numerical models, based on the rheological theory of Savage and Hutter for granular flows, are introduced. A one dimensional model with variable width, written in a curvilinear coordinate system, has been developed. New rheolog

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Guo, Hong Wei Aerospace Civil &amp Mechanical Engineering Australian Defence Force Academy UNSW. "Dispersion of two dimensional coflowing jet in the intermediate field." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Aerospace, Civil and Mechanical Engineering, 2007. http://handle.unsw.edu.au/1959.4/38726.

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An analytical dispersion model has been derived to determine the distribution of velocities and concentrations of a tracer in a two-dimensional jet in a coflowing ambient fluid. The particular novelty of this model is that it bridges the gap between near-field (where initial momentum dominates behaviour) and far-field (where ambient turbulence is more important) domains. We describe this domain as the ???intermediate field???. In a literature review of coflowing jets we find several laboratory studies and models which can predict the velocities (and in some cases concentrations) in a 2D jet, h

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