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Dissertations / Theses on the topic 'Wave based models'

Author: Grafiati

Published: 5 October 2024

Last updated: 29 July 2025

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1

Tegethoff, Mauro Viana. "IMPLEMENTATION OF THE WAVEFORM RELAXATION ALGORITHM BASED ON CHEBYSHEV POLYNOMIALS IN SPICE." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275391.

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Treiber, Martin Paul. "Characterization of cement-based multiphase materials using ultrasonic wave attenuation." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26588.

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Thesis (M. S.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Jacobs, Laurence J.; Committee Member: Kim, Jin-Yeon; Committee Member: Qu, Jianmin. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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3

Pirkl, Ryan J. "Measurement-based investigations of radio wave propagation: an exposé on building corner diffraction." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33961.

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Predicting performance metrics for the next-generation of multi-mode and multi-antenna wireless communication systems demands site-specific knowledge of the wireless channel's underlying radio wave propagation mechanisms. This thesis describes the first measurement system capable of characterizing individual propagation mechanisms in situ. The measurement system merges a high-resolution spatio-temporal wireless channel sounder with a new field reconstruction technique to provide complete knowledge of the wireless channel's impulse response throughout a 2-dimensional region. This wealth of d

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Castro, Simon Joseph. "T-wave morphology and atrio-ventricular conduction : insights from novel image-based models of the whole heart." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/twave-morphology-and-atrioventricular-conduction-insights-from-novel-imagebased-models-of-the-whole-heart(3626ead4-1cf0-4228-a70c-827b828e8f06).html.

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Cardiovascular disease is a leading cause of death in developed countries, and places a huge demand on healthcare services and economies across the globe. In this thesis computational models of the rabbit and mouse whole heart were developed and used to investigate a variety of phenomena related to cardiac electrophysiology. In part I, a heterogeneous family of single cell models was developed for the rabbit ventricles. The models were incorporated into a 3D anatomical reconstruction, and subsequently used to study the relationship between ventricular heterogeneity and the electrocardiographic

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Ramalingam, Dhandayudhapani. "DESIGN AIDS FOR AIR VESSELS FOR TRANSIENT PROTECTION OF LARGE PIPE NETWORKS - A FRAMEWORK BASED ON PARAMETERIZATION OF KNOWLEDGE-BASE DERIVED FROM OPTIMIZED NETWORK MODELS." UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_diss/489.

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The need for optimal air vessel sizing tools, in protecting large pipe networks from undue transient pressures is well known. Graphical and other heuristic methods reported in literature are limited to sizing the air vessels for simple rising mains. Although attempts have been made to utilize optimization techniques, they have been largely unsuccessful due to their impractical computational requirements. This research work proposes a robust framework for developing surge protection design tools and demonstrates the usefulness of the framework through an example air vessel sizing tool. Efficien

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Chan, Ne Xun. "One- and Three-dimensional P- and S-wave Velocity Models of Central and Southern Sweden Based on SNSN Data." Thesis, Uppsala universitet, Geofysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-231929.

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The velocity structures of southern and central part of Sweden have been derived with the local tomography (LET) method. The region has been divided into two study areas and the datasets come from the P- and S-wave traveltimes recorded by the Swedish National Seismic Network (SNSN). Man-made explosions and earthquakes occurring over the period of 5 years and 10 years, respectively, within the study areas have been used. One-dimensional starting models were derived based on an a priori model obtained from the SNSN, that were later used for starting models in the inversion for the 3-D crustal st

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Jain, Jayesh R. "Homogenization Based Damage Models for Monotonic and Cyclic Loading in 3D Composite Materials." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1230431496.

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8

Sidelel, Mihret Getye. "Simulation-Based Stochastic Blockage Model for Millimeter-wave Communication." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-276841.

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Recently, the growing demand for high data rates in wireless communication, together with the scarcity of spectrum in existing microwave bands, has motivated the use of millimeter-wave (mmWave) bands for 5G and future wireless communications. Even though mmWaves are potential candidates for fulfilling this rising demand, they come along with their own drawbacks that need to be addressed. Sensitivity to blockages is one of these drawbacks. It is a major channel impairment that is of concern in the design of mmWaves communication systems. As such, different industrial and academic research activ

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9

Nappi, Angela. "Development and Application of a Discontinuous Galerkin-based Wave Prediction Model." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1385998191.

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Jones, Christina Michele. "Applications and challenges in mass spectrometry-based untargeted metabolomics." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54830.

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Metabolomics is the methodical scientific study of biochemical processes associated with the metabolome—which comprises the entire collection of metabolites in any biological entity. Metabolome changes occur as a result of modifications in the genome and proteome, and are, therefore, directly related to cellular phenotype. Thus, metabolomic analysis is capable of providing a snapshot of cellular physiology. Untargeted metabolomics is an impartial, all-inclusive approach for detecting as many metabolites as possible without a priori knowledge of their identity. Hence, it is a valuable explorato

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11

Gang, Liu. "VERIFICATION OF SHEAR WAVE VELOCITY BASED LIQUEFACTION CRITERIA USING CENTRIFUGE MODEL." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1228274570.

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12

Lee, Kyoung-Jin. "Efficient ray tracing algorithms based on wavefront construction and model based interpolation method." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3771.

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Understanding and modeling seismic wave propagation is important in regional and exploration seismology. Ray tracing is a powerful and popular method for this purpose. Wavefront construction (WFC) method handles wavefronts instead of individual rays, thereby controlling proper ray density on the wavefront. By adaptively controlling rays over a wavefront, it efficiently models wave propagation. Algorithms for a quasi-P wave wavefront construction method and a new coordinate system used to generate wavefront construction mesh are proposed and tested for numerical properties and modeling capabili

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Mukherjee, Swagato. "Parabolic Wave Equation based Model for Propagation through Complex and Random Environments." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1595529187539516.

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Wolmarans, Hendrik Petrus. "Cochlear implant speech processing, based on the cochlear travelling wave." Diss., Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-01242006-112642.

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15

Li, Wei. "Numerical Modelling and Statistical Analysis of Ocean Wave Energy Converters and Wave Climates." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-305870.

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Ocean wave energy is considered to be one of the important potential renewable energy resources for sustainable development. Various wave energy converter technologies have been proposed to harvest the energy from ocean waves. This thesis is based on the linear generator wave energy converter developed at Uppsala University. The research in this thesis focuses on the foundation optimization and the power absorption optimization of the wave energy converters and on the wave climate modelling at the Lysekil wave converter test site. The foundation optimization study of the gravity-based foundati

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Weymouth, Gabriel David. "Physics and learning based computational models for breaking bow waves based on new boundary immersion approaches." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44754.

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Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2008.<br>Includes bibliographical references (p. 215-219).<br>A ship moving on the free surface produces energetic breaking bow waves which generate spray and air entrainment. Present experimental, analytic, and numerical studies of this problem are costly, inaccurate and not robust. This thesis presents new cost-effective and accurate computational tools for the design and analysis of such ocean systems through a combination of physics-based and learning-based models. Methods which immerse physical bounda

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Li, Yifei. "Nonlinear diffusion in mathematical biology." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/234381/1/Yifei_Li_Thesis.pdf.

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Reaction-diffusion models with nonlinear diffusion are widely used for studying population dynamics in biology and ecology. Yet, the relationship between nonlinear diffusion mechanisms in populations and the behaviours of individuals is hard to be intuitively interpreted in classical models. To address this problem, we develop a discrete-continuum modelling framework, where the movement of individuals influenced by crowding effects is connected to the nonlinear diffusivity functions in a well-defined continuum limit. Using this framework, we explore the influence of nonlinear diffusion on popu

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Avetisov, Stepan. "Herschel-Quincke filters for passive vibration mitigation." Electronic Thesis or Diss., Le Mans, 2024. https://cyberdoc-int.univ-lemans.fr/Theses/2024/2024LEMA1018.pdf.

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Les vibrations et les bruits de structure sont généralement des phénomènes indésirables pour des raisons de fiabilité et de confort. De nombreuses approches du contrôle des vibrations ont été étudiées au fil des ans, en utilisant diverses conceptions géométriques, des matériaux d'amortissement ou des stratégies de contrôle actif. En outre, l'allègement des structures mécaniques est un défi majeur en termes de consommation d'énergie, en particulier pour les applications de transport.Dans ces contextes combinés, l'objectif de cette thèse est de développer de nouveaux concepts de contrôle des vib

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Prego, Borges Jose Luis. "Lamb: a simulation tool for air-coupled lamb wave based ultrasonic NDE systems." Doctoral thesis, Universitat Politècnica de Catalunya, 2010. http://hdl.handle.net/10803/6376.

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La técnica de las ondas de Lamb acopladas por aire representa un importante avance en el área de los Ensayos No Destructivos (END) de materiales laminares.<br/>Sin embargo la compleja naturaleza de las vibraciones mecánicas encontradas en acústica, hacen que el análisis y el estudio de esta área del conocimiento sea un tema muy complejo. De allí que la posibilidad de contar con una herramienta de simulación de software que permita la evaluación y prueba de diferentes configuraciones de excitación y recepción acústica utilizando la flexibilidad de un modelo de computadora sea de una gran utilid

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Cheah, Chin Hong Civil &amp Environmental Engineering Faculty of Engineering UNSW. "Kinematic wave modelling of surface runoff quantity and quality for small urban catchments in Sydney." Awarded By:University of New South Wales. Civil & Environmental Engineering, 2009. http://handle.unsw.edu.au/1959.4/44618.

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Extensive research has been undertaken to improve the robustness of runoff quantity predictions for urban catchments. However, equally robust predictions for runoff quality have yet to be attained. Past studies addressing this issue have typically been confined to the use of simple conceptual or empirical models which forgo the tedious steps of providing a physical representation of the actual system to be modelled. Consequently, even if the modelling results for the test catchments are satisfactory, the reliability and applicability of these models for other catchments remain uncertain. It is

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21

Tan, Jun Liang. "Development of a pitch based wake optimisation control strategy to improve total farm power production." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-304705.

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In this thesis, the effect of pitch based optimisation was explored for a 80 turbine wind farm. Using a modified Jensen wake model and the Particle Swarm Optimisation (PSO) model, a pitch optimisation strategy was created for the dominant turbulence and atmospheric condition for the wind farm. As the wake model was based on the FLORIS model developed by P.M.O Gebraad et. al., the wake and power model was compared with the FLORIS model and a -0.090% difference was found. To determine the dynamic predictive capability of the wake model, measurement values across a 10 minute period for a 19 wind

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Margalef, rovira Marc. "Design of mm-wave Reflection-Type Phase Shifters with Oscillation-Based Test capabilities." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALT025.

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Ce travail porte sur la conception de déphaseurs de type réflectif (RTPS) sur silicium à ondes millimétriques avec des moyens de test basé sur l'oscillation (OBT). Pour plus de cohérence, une seule technologie a été utilisée, la BiCMOS STM 55 nm. Tout d'abord, la théorie et les mises en œuvre pratiques des coupleurs 3-dB sont discutées. Une attention particulière est portée à la topologie du guide d'onde coplanaire couplé à ondes lentes (CS-CPW), en raison de ses bonnes performances. En utilisant cette topologie, les mesures de deux coupleurs 3-dB sont rapportées : (i) un coupleur de 120 GHz,

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23

Willemse, Chandre Monique. "Nanocomposite-graphene based platform for heavy metal detection." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_8123_1323852117.

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This study reports the synthesis of graphene by oxidizing graphite to graphite oxide using H2SO4 and KMnO4 and reducing graphene oxide to graphene by using NaBH4. Graphene was then characterized using FT-IR, TEM, AFM, XRD, Raman spectroscopy and solid state NMR. Nafion-Graphene in combination with a mercury film electrode, bismuth film electrode and antimony film electrode was used as a sensing platform for trace metal analysis in 0.1 M acetate buffer (pH 4.6) at 120 s deposition time, using square-wave anodic stripping voltammetry (SWASV). Detection limits were calculated using 3Ïblank/slope

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Husson, Romain. "Development and validation of a global observation-based swell model using wave mode operating Synthetic Aperture Radar." Phd thesis, Université de Bretagne occidentale - Brest, 2012. http://tel.archives-ouvertes.fr/tel-00863728.

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The capability to observe ocean swell using spaceborne Synthetic Aperture Radar (SAR) has been demonstrated starting with ERS-1 mission in 1992. This dissertation shows how ocean swell properties can be used to combine swell observations of heterogeneous quality and acquired at various times and locations for the observation and forecast of ocean swell fieldsusing ASAR instrument on-board ENVISAT. The first section is a review of how ocean swell spectra can be derived from the SAR complex images of the ocean surface using a quasi-linear transformation. Then, significant swell heights, peak per

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Chang, Tsu-Sheng. "A study of seismic response of rotating machines subjected to multi-component base excitation." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-05042010-020148/.

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Ebrahimian, Mahdi. "Structural system identification and health monitoring of buildings by the wave method based on the Timoshenko beam model." Thesis, University of Southern California, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3722860.

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<p> This dissertation presents a new development of the wave method for structural health monitoring (SHM) of buildings. Robust and reliable SHM methods help save lives and reduce economic losses caused by earthquakes and other extreme events. Previously, in system identification and health monitoring, it was assumed that waves of different frequency propagate with constant velocity and the identification was based on the non-dispersive shear beam model of the structure. This study presents the first effort to consider dispersive wave propagation in system identification and health monitoring

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Seon, Guillaume. "Finite element-based failure models for carbon/epoxy tape composites." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28117.

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Perry, Anna K. "An investigation into the base pressure of simplified automotive squareback geometries." Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/22605.

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Since the fuel crisis of the 1970s, aerodynamic design has become essential to the vehicle design process in order to reduce fuel consumption and lower emissions as well as (in more recent years) increase the range on vehicles with alternative powertrains. Production car manufacturers have developed shape optimisation techniques that have generated significant improvements over the years however, in order to achieve further gains, a deeper understanding of the fundamental flow structures around vehicles must be achieved. This thesis reports the findings of three studies that aim to understand

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Rampersadh, Gevashkar. "Sea-state interaction based dynamic model of the Liquid Robotics' Wave Glider: Modelling and control of a hybrid multi-body vessel." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29352.

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A new class of unmanned marine research vessels makes use of wave propulsion to minimise energy requirements during voyages. Existing models of these hybrid sea-surface and underwater craft have not considered if the platform’s interaction with the immediate surrounding sea could be incorporated to allow for more accurate navigation and path planning. To this end a detailed three-dimensional model of one such vessel, the Liquid Robotics’ Wave Glider, has been developed in this study. The multi-body system is described using DenavitHartenberg parametrisation and a Lagrangian approach is used to

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Aloi, Daniel Nicholas. "Development and verification of a mathematical model to investigate the effects of earth-surface-based multipath reflections at a differential global positioning system ground reference site." Ohio : Ohio University, 1999. http://www.ohiolink.edu/etd/view.cgi?ohiou1175264170.

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Montgomery, Zachary S. "A Propeller Model Based on a Modern Numerical Lifting-Line Algorithm with an IterativeSemi-Free Wake Solver." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7001.

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A fundamental aerodynamic analysis technique for a single straight fixed wing has been expounded upon and turned into a modern technique that can analyze multiple wings of more realistic shapes common on aircraft. This modern technique is extended further to apply towards propellers. A method to overcome propeller analysis problems at low airspeeds is presented. This method is compared to more traditional propeller analysis techniques.

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Ticha, Lawrence Awa. "Development of amperometric biosensor with cyclopentadienylruthenium (II) thiolato schiff base self-assembled monolayer (SAM) on gold." Thesis, University of the Western Cape, 2007. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_5394_1341319478.

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A novel cyclopentadienylruthenium(II) thiolato Schiff base, [Ru(SC6H4NC(H)C6H4OCH2CH2SMe)(&eta<br>5-C2H5]2 was synthesized and deposited as a selfassembled monolayer (SAM) on a gold electrode. Effective electronic communication between the Ru(II) centers and the gold electrode was established by electrostatically cycling the Shiff base-doped gold electrode in 0.1 M NaOH from -200 mV to +600 mV. The SAMmodified gold electrode (Au/SAM) exhibited quasi-reversible electrochemistry. The integrity of this electro-catalytic SAM, with respect to its ability to block and electro-catalyze certain Farada

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Peldan, Erik. "Computation of Air-Vortices Based on GPU Technology : Optimizing and Parallelizing a Model for Wake-Vortex Prediction Using OpenCL." Thesis, KTH, Numerisk analys, NA, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-118062.

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This thesis details the refinement and numerical solution of a preexisting model for predicting the strengths and positions of so-called wake-vortices that are generated from the lift of heavy aircraft. The ultimate objective is to implement a numerical scheme for the model that is fast enough to allow for probabilistic methods, such as Monte Carlosimulations, in order to deal with the inherent uncertainty in input parameters for wake-vortex predictions. The differential equation system of the wake-vortex model is stated clearly, which has not been done before. The refinement consists in reduc

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Ettehadi, Seyedrohollah. "Model-based and machine learning techniques for nonlinear image reconstruction in diffuse optical tomography." Thèse, Université de Sherbrooke, 2017. http://hdl.handle.net/11143/11895.

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La tomographie optique diffuse (TOD) est une modalité d’imagerie biomédicale 3D peu dispendieuse et non-invasive qui permet de reconstruire les propriétés optiques d’un tissu biologique. Le processus de reconstruction d’images en TOD est difficile à réaliser puisqu’il nécessite de résoudre un problème non-linéaire et mal posé. Les propriétés optiques sont calculées à partir des mesures de surface du milieu à l’étude. Dans ce projet, deux méthodes de reconstruction non-linéaire pour la TOD ont été développées. La première méthode utilise un modèle itératif, une approche encore en développ

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Konkel, Frederic [Verfasser], and Bjoern [Akademischer Betreuer] Petersson. "Sound field in small fitted enclosures - A comparison between a model of random wave guides and a model based on a modal analysis aligned with installed obstacles - / Frederic Konkel. Betreuer: Bjoern Petersson." Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2012. http://d-nb.info/1024771857/34.

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Pinault, Jonas. "Study of swash motion in an embayed beach based on observations and phase-resolving wave modeling - Case of the Grande Plage of Biarritz." Electronic Thesis or Diss., Pau, 2022. http://www.theses.fr/2022PAUU3015.

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Dans le contexte de la montée des eaux associée au réchauffement climatique et d’une pression anthropique dans les zones côtières toujours plus forte, une bonne compréhension et modélisation du niveau d’eau total à la côte sont primordiales pour anticiper au mieux le risque côtier et déployer à temps des solutions efficaces. En particulier, l’action des vagues appelée jet de rive joue un rôle important le long des côtes exposées aux houles océaniques. Dans cette étude, nous avons étudié la dynamique du jet de rive dans une plage de poche urbanisée à forts enjeux car soumise aux aléas submersio

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Ben, Souf Mohamed Amine. "Approche stochastique à base de modes d'ondes : théorie et applications en moyennes et hautes fréquences." Thesis, Ecully, Ecole centrale de Lyon, 2012. http://www.theses.fr/2012ECDL0035/document.

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Ce travail de recherche a été réalisé au sein du Laboratoire de Tribologie et Dynamique des Systèmes de l’École Centrale de Lyon (FRANCE) en cotutelle avec l’Unité de Mécanique, Modélisation et Productique (U2MP) à l’École Nationale d’Ingénieurs de Sfax (TUNISIE) dans le cadre du projet européen "Mid-Frequency". La prédiction du comportement dynamique des structures est une tâche importante dans la phase de conception de tout produit mécanique. Le choix de l’outil ou de la méthode utilisée dépend de plusieurs facteurs. Pour un système dynamique, la bande de fréquence d’étude est l’un des param

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Tilhac, Cyrille. "Développement d’architectures de filtres à base de résonateurs à ondes acoustiques de volume et contribution à l’intégration dans une technologie avancée silicium industrielle pour des applications radio-fréquences." Limoges, 2007. http://aurore.unilim.fr/theses/nxfile/default/80d92337-b229-40e2-a75a-1b8eb28464c8/blobholder:0/2007LIMO4012.pdf.

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Pour des raisons de coût, de consommation et de volume, l'intégration complète des systèmes de communication apparaît comme un sujet porteur pour l'industrie de la microélectronique. C'est pourquoi, de nouveaux résonateurs à ondes acoustiques de volume (BAW) se développent. Un des avantages de ces résonateurs est la possibilité de les intégrer dans un système complet sur substrat silicium pour des applications de type filtrage. En revanche, il existe des variations dans le procédé de fabrication qui font que les épaisseurs des matériaux déposés fluctuent légèrement. Cela impacte directement la

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Chinsomboon, Garrett. "New model for the 5-20 cm wavelength opacity of ammonia pressure-broadened by methane under jovian conditions based on laboratory measurements." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45858.

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In order to fully understand the role methane (CH₄) plays in the microwave emission spectra of the deep atmospheres of the outer planets, over 280 laboratory measurements of the opacity of ammonia in a methane environment have been made in the 5-20 cm wavelength range. All opacity measurements were made with either 100 or 200 mbars of ammonia and with 1 to 3 bars of added methane in the 330-450K temperature range. A formalism for the absorptivity of ammonia broadened by methane has now been developed and had been applied to the Hanley et al. (Icarus, v. 202, 2009) model for the opacity of ammo

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Gueuder, Maxime. "Quatre essais sur les inégalités et l'instabilité macroéconomique." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0534.

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Cette thèse porte sur l’étude des inégalités dans un cadre macroéconomique, d’un point de vue théorique ainsi qu’empirique. Dans un premier chapitre, j’écris et simule un modèle basé-agents capable de répliquer les distributions fat-tailed des richesses observées empiriquement dans les économies développées. Dans un second chapitre, je prolonge ce modèle théorique pour étudier l’impact économique des discriminations interpersonnelles et institutionnelles. Lorsque les discriminations institutionnelles cessent, l’état final des inégalités dépend de l’économie au moment de la fin de ces discrimin

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Ebersohn, Suzette. "Die benutting van veerkrag deur middel-adolessente in ’n hersaamgestelde gesin." Thesis, University of Pretoria, 2011. http://hdl.handle.net/2263/24197.

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Divorce is a potentially destructive reality in society. According to the bio-ecological model of Bronfenbrenner, the development of the child takes place within two micro family systems when a family is reconstituted following divorce: the primary micro family system, where the child resides permanently with his/her biological parent who has parental rights and responsibilities, as well as the secondary micro family system of the other biological parent who also has parental rights and responsibilities, where the child visits periodically. Challenges that the child faces in the context of the

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Camus, Olivier. "Modélisation des propriétés magnétiques de matériaux ferrite et de composites à base de ferrite absorbant le rayonnement électromagnétique." Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL022N.

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Cette étude porte sur la modélisation de la perméabilité magnétique de ferrites pour leur utilisation en tant qu'absorbants aux ondes hyperfréquences. Les ferrites étudiés se trouvent sous la forme de matériaux frittés ou de composites. L’absorption d'une onde électromagnétique par des ferrites frittés est provoquée par la rotation de l'aimantation dans des domaines magnétiques et par le déplacement des parois entre ces domaines. Nous développons des modèles basés sur l'association de phénomènes résonants et/ou relaxants pour représenter la dépendance en fréquence de la perméabilité magnétique

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Braun, Loïc. "Composants à ondes élastiques de surface pour le filtrage à gabarits maîtrisés aux fréquences radios pour applications spatiales et professionnelles." Thesis, Besançon, 2015. http://www.theses.fr/2015BESA2020/document.

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Ce mémoire traite de l’ étude et de la réalisation de composants à ondes élastiques de surface (SAW) pour des applications de filtrage dans les gammes VHF et UHF. Nous y étudions différentes structures de ces filtres, à commencer par des filtres à couplage acoustique longitudinal centrés aux alentoursdu gigahertz, de bande passante relative inférieure à 0,1 % réalisés sur quartz. Leur fabrication et leur caractérisation ont révélé des pertes d’insertion inférieures à 5 dB et des niveaux de rejet supérieurs à 20 dB, conformément aux prévisions de notre modèle de matrice mixte. Un tel filtre a é

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Demin, Ivan. "Modélisations mathématiques de l’hématopoïèse et des maladies sanguines." Thesis, Lyon 1, 2009. http://www.theses.fr/2009LYO10333/document.

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Cette thèse est consacrée à la modélisation mathématique de l'hématopoïèse et des maladies sanguines. Plusieurs modèles traitant d'aspects différents et complémentaires de l'hématopoïèse y sont étudiés.Tout d'abord, un modèle multi-échelle de l'érythropoïèse est analysé, dans lequel sont décrits à la fois le réseau intracellulaire, qui détermine le comportement individuel des cellules, et la dynamique des populations de cellules. En utilisant des données expérimentales sur les souris, nous évaluons les rôles des divers mécanismes de retro-contrôle en réponse aux situations de stress.Ensuite, n

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PILLAI, Vinoshene. "Intravital two photon clcium imaging of glioblastoma mouse models." Doctoral thesis, Scuola Normale Superiore, 2021. http://hdl.handle.net/11384/109211.

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Barone, Anthony J. "State Level Earned Income Tax Credit’s Effects on Race and Age: An Effective Poverty Reduction Policy." Scholarship @ Claremont, 2013. http://scholarship.claremont.edu/cmc_theses/771.

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In this paper, I analyze the effectiveness of state level Earned Income Tax Credit programs on improving of poverty levels. I conducted this analysis for the years 1991 through 2011 using a panel data model with fixed effects. The main independent variables of interest were the state and federal EITC rates, minimum wage, gross state product, population, and unemployment all by state. I determined increases to the state EITC rates provided only a slight decrease to both the overall white below-poverty population and the corresponding white childhood population under 18, while both the overall a

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Kovaltchouk, Thibaut. "Contributions à la co-optimisation contrôle-dimensionnement sur cycle de vie sous contrainte réseau des houlogénérateurs directs." Thesis, Cachan, Ecole normale supérieure, 2015. http://www.theses.fr/2015DENS0033/document.

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Les Energies Marines Renouvelables (EMR) se développent aujourd’hui très vite tant au niveau de la recherche amont que de la R&D, et même des premiers démonstrateurs à la mer. Parmi ces EMR, l'énergie des vagues présente un potentiel particulièrement intéressant. Avec une ressource annuelle brute moyenne estimée à 40 kW/m au large de la côte atlantique, le littoral français est plutôt bien exposé. Mais l’exploitation à grande échelle de cette énergie renouvelable ne sera réalisable et pertinente qu'à condition d'une bonne intégration au réseau électrique (qualité) ainsi que d'une gestion e

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Corman, Maya. "Approche psychologique des personnes atteintes d'hémopathies et inscrites dans un processus de greffe de cellules souches hématopoiétiques (CSH) : identification des facteurs socio-psychologiques impliqués dans l’état de santé mentale et physique aux différents stades du processus et développement d’un programme d’intervention adapté." Thesis, Université Clermont Auvergne‎ (2017-2020), 2020. http://www.theses.fr/2020CLFAL015.

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L’allogreffe de cellules souches hématopoïétiques, ou greffe de moelle osseuse, fait partie des traitements proposés pour enrayer la course d’hémopathies malignes telles que la leucémie aiguë. Cette intervention consiste à remplacer les cellules du sang malades par des cellules saines, grâce à un donneur compatible afin de maximiser les chances de réussite. Bien que l’injection du greffon apparaisse comme une intervention relativement simple, il n’en demeure pas moins que cet acte s’inscrit dans un processus qui commence bien avant l’intervention et qui a des conséquences durant les mois, voir

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"Technical analysis based on Elliott wave principle for FX trade." 2000. http://library.cuhk.edu.hk/record=b5890183.

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by Lee Yat Fai, Frederick, Pang Fai.<br>Thesis (M.B.A.)--Chinese University of Hong Kong, 2000.<br>Includes bibliographical references (leaf 34).<br>Chapter 1. --- Introduction --- p.1<br>Chapter 1.1 --- Background --- p.2<br>Chapter 2. --- Methodology --- p.4<br>Chapter 2.1 --- Approach --- p.5<br>Chapter 2.2 --- Model Automation Tools --- p.7<br>Chapter 2.2.1 --- Data --- p.7<br>Chapter 2.2.2 --- Trend Identification by Regression --- p.8<br>Chapter 2.2.3 --- Programming variables --- p.13<br>Chapter 2.2.4 --- Execution --- p.13<br>Chapter 3. --- Literature Review --- p.16<br>Chapt

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Rathod, Vivek T. "Ultrasonic Guided Wave Based Models, Devices and Methods for Integrated Structural Health Monitoring." Thesis, 2014. http://etd.iisc.ac.in/handle/2005/3054.

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Structural Health Monitoring (SHM) systems for future structures and vehicles would involve a process of damage identification and prediction of certain quantities of interest that concerns the function and safety. This process provides SHM systems the ability to not only save cost but also enhance the service life, safety and reliability of the structures and vehicles. Integrated SHM system (ISHM) is an advancement of SHM system that has additional capability of predicting the component life/failure. ISHM system development involves detailed understanding of diagnostic waves, hardware compone

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