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Dissertations / Theses on the topic 'Interaction forces'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Boks, Niels P. "Bacterial interaction forces in adhesion dynamics." [S.l. : [Groningen : s.n.] ; University Library Groningen] [Host], 2009. http://irs.ub.rug.nl/ppn/.

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2

Hunt, Geoffrey A. "Dynamic analysis of railway vehicle/track interaction forces." Thesis, Loughborough University, 1986. https://dspace.lboro.ac.uk/2134/7492.

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Methods of predicting the dynamic forces are developed for the cases of vehicles negotiating vertical and lateral track irregularities. The bounds of validity of various models of the track are evaluated, from single degree of freedom, lumped parameter models to the case of a two layered beam on elastic foundation with a moving dynamic load. For the case of the lateral response of a vehicle negotiating a track switch, a finite element model of the track is also developed. The vehicle model developed for-the vertical case contains all the rigid body modes of a four axle vehicle for which primar

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Tha, Susan P. L. "Interaction forces between human red cells aggutinated by antibody." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75421.

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A theoretical and experimental method is described whereby the hydrodynamic forces, both normal and shear, acting on the spheres of a doublet can be calculated. This is applied to a system of sphered human red blood cells agglutinated by human hyperimmune anti-B antiserum undergoing Poiseuille flow and observed using the traveling microtube technique. The mean forces separating the cells of individual doublets were found to be proportional to antiserum concentration from 0.73 to 3.56% v/v, normal forces increasing from 0.060 to 0.197 nN and shear forces from 0.023 to 0.072 nN. It was impossibl

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4

Arai, Nozomi. "Self-Assembly of Colloidal Particles with Controlled Interaction Forces." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263693.

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5

Hansson, Petra M. "Hydrophobic surfaces: Effect of surface structure on wetting and interaction forces." Doctoral thesis, KTH, Yt- och korrosionsvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-103409.

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The use of hydrophobic surfaces is important for many processes both in nature and industry. Interactions between hydrophobic species play a key role in industrial applications such as water-cleaning procedures and pitch control during papermaking but they also give information on how to design surfaces like hydrophobic mineral pigments. In this thesis, the influence of surface properties on wetting and interaction forces has been studied. Surfaces with close-packed particles, pore arrays, randomly deposited nanoparticles as well as reference surfaces were prepared. The atomic force microscope

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6

Fitzpatrick, Helen. "Direct measurement of the forces of interaction between adsorbed protein layers." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46769.

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7

Dean, Delphine Marguerite Denise 1978. "Modeling and measurement of intermolecular interaction forces between cartilage ECM macromolecules." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/30153.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.<br>Includes bibliographical references (p. 143-151).<br>The mechanical properties of cartilage tissue depend largely on the macromolecules that make up its extracellular matrix (ECM). Aggrecan is the most abundant proteoglycan in articular cartilage. It is composed of a core protein with highly charged, densely packed glycosaminoglycan (GAG) side chains, which are responsible for [approximately] 50% of the equilibrium compressive stiffness of the tissue. Using atomic force micros

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8

Marla, Krishna Tej. "Molecular Thermodynamics of Nanoscale Colloid-Polymer Mixtures: Chemical Potentials and Interaction Forces." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/7604.

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Nanoscale colloidal particles display fascinating electronic, optical and reinforcement properties as a consequence of their dimensions. Stable dispersions of nanoscale colloids find applications in drug delivery, biodiagnostics, photonic and electronic devices, and polymer nanocomposites. Most nanoparticles are unstable in dispersions and polymeric surfactants are added generally to improve dispersability and control self-assembly. However, the effect of polymeric modifiers on nanocolloid properties is poorly understood and design of modifiers is guided usually by empirical approaches. Monte

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Marla, Krishna Tej. "Molecular thermodynamics of nanoscale colloid-polymer mixures: chemical potentials and interaction forces." Available online, Georgia Institute of Technology, 2004, 2004. http://etd.gatech.edu/theses/available/etd-08102004-105655/.

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Thesis (Ph. D.)--Chemical Engineering, Georgia Institute of Technology, 2006.<br>Dr. J. Carson Meredith, Committee Chair ; Dr. Charles A. Eckert, Committee Member ; Dr. Clifford L. Henderson, Committee Member ; Dr. Rigoberto Hernandez, Committee Member ; Dr. Peter J. Ludovice, Committee Member. Vita. Includes bibliographical references.

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10

Camesano, Terri Anne. "An investigation of bacterial interaction forces and bacterial adhesion to porous media." Adobe Acrobat reader required to view the full dissertation, 2000. http://www.etda.libraries.psu.edu/theses/approved/PSUonlyIndex/ETD-19/index.html.

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11

Zhang, Ying. "Dynamic spatio-temporal interaction of morphogens, forces and growth in embryonic morphogenesis." [Bloomington, Ind.] : Indiana University, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3297105.

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Thesis (Ph.D.)--Indiana University, Dept. of Physics, 2007.<br>Title from dissertation home page (viewed Sept. 29, 2008). Source: Dissertation Abstracts International, Volume: 69-02, Section: B, page: 0881. Adviser: James A. Glazier.

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12

Schimmoller, Brian Keith. "A bubble-particle interaction model for flotation combining hydrodynamic and surface forces." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09192009-040332/.

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13

Lee, Rhonda Joy. "Studies of solid-solid interaction forces and the pneumatic handling of powders /." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487848078451112.

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14

Musoke, Michael. "Direct measurement of polymer interaction forces in good and poor solvents by using a modified atomic force microscope (AFM)." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391121.

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15

Vincent, Abhilash. "Probing the Nanoscale Interaction Forces and Elastic Properties of Organic and Inorganic Materials Using Force-Distance (F-D) Spectroscopy." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4251.

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Due to their therapeutic applications such as radical scavenging, MRI contrast imaging, Photoluminescence imaging, drug delivery, etc., nanoparticles (NPs) have a significant importance in bio-nanotechnology. The reason that prevents the utilizing NPs for drug delivery in medical field is mostly due to their biocompatibility issues (incompatibility can lead to toxicity and cell death). Changes in the surface conditions of NPs often lead to NP cytotoxicity. Investigating the role of NP surface properties (surface charges and surface chemistry) on their interactions with biomolecules (Cells, pro

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16

Oral, Hasan Giray. "Modeling time-resolved interaction force mode AFM imaging." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43691.

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Intermittent contact mode atomic force microscopy has been widely employed for simultaneous topography imaging and material characterization. The work in the literature includes both qualitative and quantitative methods. Regular AFM cantilevers are generally used in these methods, yet these cantilevers come with certain limitations. These limitations result from the very nature of cantilever probes. They are passive force sensors with insufficient damping. This prevents having active and complete control on tip-sample forces, causing sample damage and inaccurate topography measurement. Ideally

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17

Wong, Jason. "Simulation of realistic leaf behavior and interaction with external forces for virtual reality landscapes." University of Western Australia. School of Computer Science and Software Engineering, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0123.

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[Truncated abstract] Currently, one of the active areas of research in computer graphics is related to creating realistic images and animations that mimic the world we see around us. There has been significant work in modeling and simulating natural phenomena such as fire, clouds, water, and vegetation. Some of these works are employed in the entertainment industry, especially as special effects in cinematic films. Of particular interest is the area of vegetation, given the possible structural complexity and variation in different types of plants. This provides a challenge to develop methods a

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18

PEREIRA, Paulo César do Nascimento. "Energy and interaction forces in classical two-dimensional crystals with inhomogeneous goarse-grained density." Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/24738.

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Submitted by Alice Araujo (alice.caraujo@ufpe.br) on 2018-06-04T21:35:05Z No. of bitstreams: 1 DISSERTAÇÃO Paulo César do Nascimento Pereira.pdf: 2703403 bytes, checksum: 82c945ba1355407e2c749d7e6fd0b116 (MD5)<br>Made available in DSpace on 2018-06-04T21:35:05Z (GMT). No. of bitstreams: 1 DISSERTAÇÃO Paulo César do Nascimento Pereira.pdf: 2703403 bytes, checksum: 82c945ba1355407e2c749d7e6fd0b116 (MD5) Previous issue date: 2016-04-13<br>CNPQ<br>In this M.Sc. thesis, we concentrate on classical two-dimensional crystals with soft pairwise interactions at low temperatures. Typically, the tri

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19

Powell, Alexander Frank. "An investigation into the relationship between vertical and lateral forces, speed and superelevation in railway curves." Diss., University of Pretoria, 2016. http://hdl.handle.net/2263/59440.

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The Gautrain Rapid Rail Link (GRRL) is a rail transit system in South Africa that links Johannesburg and Pretoria, as well as Johannesburg and the O.R. Tambo International Airport. Travelling at speeds of up to 160 km/h, the Gautrain system is the first of its kind on the African continent. This dissertation covers an investigation into the relationship between the vertical and lateral forces, speed and superelevation in a GRRL curve. The research described in this dissertation is based on an experiment which involved running a test train through a curve at various speeds, changing the cant of

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20

Desormeaux, Kevin. "Temporal models of motions and forces for Human-Robot Interactive manipulation." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30221.

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L'intérêt pour la robotique a débuté dans les années 70 et depuis les robots n'ont cessé de remplacer les humains dans l'industrie. L'automatisation à outrance n'apporte cependant pas que des avantages, car elle nécessite des environnements parfaitement contrôlés et la reprogrammation d'une tâche est longue et fastidieuse. Le besoin accru d'adaptabilité et de ré-utilisabilité des systèmes d'assemblage force la robotique à se révolutionner en amenant notamment l'homme et le robot à interagir. Ce nouveau type de collaboration permet de combiner les forces respectives des humains et des robots. C

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21

Widarda, Dina Rubiana. "Longitudinal forces in continuously welded rails due to nonlinear track-bridge interaction for loading sequences." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1238081328011-05497.

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The use of continuously welded rails (CWR) governs the longitudinal stress caused by seasonal temperature changes, bending of supporting structure and braking/accelerating due to passing trains. Those three loads have been regulated in Eurocode1 and accomplished by the national codes like DIN Fb-101 in Germany. An additional loading case identified and treated in this thesis is the load due to a change of the coupling stiffness in longitudinal direction between the track and bridge. This additional load occurs as a consequence of the employment of a nonlinear stiffness law which increases the

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Widarda, Dina Rubiana. "Longitudinal forces in continuously welded rails due to nonlinear track-bridge interaction for loading sequences." Doctoral thesis, Technische Universität Dresden, 2008. https://tud.qucosa.de/id/qucosa%3A23616.

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The use of continuously welded rails (CWR) governs the longitudinal stress caused by seasonal temperature changes, bending of supporting structure and braking/accelerating due to passing trains. Those three loads have been regulated in Eurocode1 and accomplished by the national codes like DIN Fb-101 in Germany. An additional loading case identified and treated in this thesis is the load due to a change of the coupling stiffness in longitudinal direction between the track and bridge. This additional load occurs as a consequence of the employment of a nonlinear stiffness law which increases the

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23

Dobryden, Illia. "Scanning probe microscopy studies of interaction forces between particles: emphasis on magnetite, bentonite and silica." Doctoral thesis, Luleå tekniska universitet, Materialvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25691.

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Scanning probe microscopy (SPM), such as the atomic force microscope (AFM), using colloidal probes is a highly suitable technique to probe single particle-particle interactions in aqueous solution. The interaction force between a colloidal probe on the AFM cantilever and sample surface is measured. Ultrasmall intermolecular and surface forces, down to the piconewton level, can reliably be measured under controlled experimental conditions with AFM. The interaction between magnetite, bentonite and silica particles plays an important role in many different applications. One important application

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24

Ocampo, Minette C. "Protein-Lipid Interactions with Pulmonary Surfactant Using Atomic Force Microscopy." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1395050693.

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25

Shinto, Hiroyui. "Interfacial Microstructures and Interaction Forces between Colloidal Particles in Simple and complex Fluids-Molecular Dynamics Simulation-." Kyoto University, 1999. http://hdl.handle.net/2433/77943.

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26

Arjmandi-Tash, Omid. "Interaction of droplets and foams with solid/porous substrates." Thesis, Loughborough University, 2017. https://dspace.lboro.ac.uk/2134/24889.

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Current problems on the interaction of complex liquids (i.e. droplets or foams) with complex surfaces (i.e. soft deformable or porous surfaces) are addressed in the following areas: (1) wetting of deformable substrates and surface forces, (2) kinetics of wetting and spreading of non-Newtonian liquids over porous substrates, (3) kinetics of spreading of non-Newtonian solutions over hair, (4) free drainage of foams produced from non-Newtonian solutions, and (5) foam drainage placed on porous substrates. Equilibrium of liquid droplets on deformable substrates was investigated and the effect of di

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Paljic, Alexis. "Interaction en environnements immersifs et retours d'effort passifs." Paris 6, 2004. https://hal-mines-paristech.archives-ouvertes.fr/tel-01479203.

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28

Antonopoulos, Theodoros C. Yiazitzis John T. "The constitutional and legal status of the Hellenic Armed Forces and their interaction with the Hellenic Society /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA342026.

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Thesis (M.A. in National Security Affairs) Naval Postgraduate School, December 1997.<br>"December 1997." Thesis advisor(s): Cynthia Levy. Includes bibliographical references (p. 93-94). Also available online.

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Antonopoulos, Theodoros C., and John T. Yiazitzis. "The constitutional and legal status of the Hellenic Armed Forces and their interaction with the Hellenic Society." Thesis, Monterey, California. Naval Postgraduate School, 1997. http://hdl.handle.net/10945/8145.

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Approved for public release; distribution is unlimited<br>Hellas was officially declared an independent State in 1828, after a seven-year struggle against the conquerors. Despite the young age, however, she demonstrated a rich, and often turbulent, political life. The followed pattern was not unique by itself: it reflected the parliamentary transformations that swept all over Europe during the last three hundred years. Its uniqueness lies on the rapidity with which these transformations took place, until the finalization of stable republican governance in 1974. What makes this Thesis interesti

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Economides, Spyridon. "The international implications of the Greek Civil War : the interaction of domestic and external forces, 1946-1949." Thesis, London School of Economics and Political Science (University of London), 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307701.

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31

Lardon, Isabelle. "Interaction d'une dislocation vis avec une interface cohérente : étude des forces images par simulation à l'échelle atomique." Poitiers, 1994. http://www.theses.fr/1994POIT2316.

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Les forces d'interaction entre les dislocations et les interfaces sont d'origines diverses. Cette etude est consacree a l'interaction d'une dislocation vis avec une interface coherente separant deux phases de modules elastiques differents. La principale difficulte de ce probleme est qu'en elasticite les dislocations et les interfaces sont des singularites, ce qui conduit a la divergence des forces d'interaction. A l'echelle atomique, les curs de dislocations et les interfaces ayant une extension non nulle, ces problemes inherents a l'elasticite disparaissent. Dans le cas de faibles differences

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Tarasova, Anna Optometry UNSW. "Fabrication and characterisation of affinity-bound liposomes." Awarded by:University of New South Wales. Optometry, 2007. http://handle.unsw.edu.au/1959.4/29114.

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In considering the concept of surface-immobilised liposomes as a drug release system, two factors need to addressed, the interfacial surface density of the liposomes for maximum drug loading and the stability of these liposomes to allow for controlled drug release. This thesis investigates a multilayer system for the affinity immobilisation of liposomes and their stability to various applied stresses. In the work presented here an allylamine monomer was used to create plasma coatings that were stable, thin and amine-rich. The aging studies using AFM showed these films to rapidly oxidise on exp

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Smee, Delbert Lee. "The Ecology of Yikes! Environmental Forces Alter Prey Perception of Predators." Diss., Connect to this title online, 2006. http://etd.gatech.edu/theses/available/etd-05082006-213823/.

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Thesis (Ph. D.)--Georgia Institute of Technology, 2006.<br>Title from PDF t.p. (viewed on Oct. 28, 2006). Marc Weissburg, Committee Chair ; Mark Hay, Committee Member ; Lin Jiang, Committee Member ; David Dusenbery, Committee Member ; Don Webster, Committee Member. Includes bibliographical references (p. 115-122).

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Gambin, Yann. "Dynamique en milieux confinés : peptides et protéines en interaction avec des bicouches modèles." Paris 6, 2006. http://www.theses.fr/2006PA066609.

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35

Passerat, de Silans Thierry. "Interaction atome-surface : Interaction de Van der Waals entre un atome exité et une surface diélectrique thermiquement émissive : Oscillations de Bloch pour un atome adsorbé." Paris 13, 2009. http://scbd-sto.univ-paris13.fr/secure/edgalilee_th_2009_passerat_de_silans.pdf.

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Dans cette thèse nous avons étudié différents aspects de l’interaction entre un atome et une surface diélectrique. Nous avons notamment recherché expérimentalement des situations où l’interaction de van der Waals à longue portée varie avec la population thermique de photons du vide, telle qu’imposée par un équilibre avec l’environnement. Une variation avec la température est prévue lorsqu’il y a un couplage virtuel résonnant en champ proche entre l’émission thermique de la surface (dans l’IR) et une absorption atomique. Notre recherche a porté sur l’interaction entre Cs(8P) et une surface de C

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Saunders, Daniel Curtis. "Wind Turbine Wake Interactions - Characterization of Unsteady Blade Forces and the Role of Wake Interactions in Power Variability Control." ScholarWorks @ UVM, 2017. http://scholarworks.uvm.edu/graddis/745.

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Growing concerns about the environmental impact of fossil fuel energy and improvements in both the cost and performance of wind turbine technologies has spurred a sharp expansion in wind energy generation. However, both the increasing size of wind farms and the increased contribution of wind energy to the overall electricity generation market has created new challenges. As wind farms grow in size and power density, the aerodynamic wake interactions that occur between neighboring turbines become increasingly important in characterizing the unsteady turbine loads and power output of the farm. Tu

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37

Lundberg, Oskar. "On the influence of surface roughness on rolling contact forces." Doctoral thesis, KTH, MWL Marcus Wallenberg Laboratoriet, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-193935.

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Road vehicle tyres, railway wheels and ball bearings all generate rolling contact forces which are transferred within a finite area of contact between the rolling element and the substrate. Either it is visible or not for the human eye, a certain degree of roughness is always present on the contacting surfaces and it influences the generation of both vertical and lateral contactforces. The purpose of this investigation is to enhance the understanding and modelling of the influence from small-scale surface roughness on the generation of rolling contact forces. To this end, a computationally eff

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Schiefele, Jürgen. "Casimir-Polder interaction in second quantization." Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2011/5417/.

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The Casimir-Polder interaction between a single neutral atom and a nearby surface, arising from the (quantum and thermal) fluctuations of the electromagnetic field, is a cornerstone of cavity quantum electrodynamics (cQED), and theoretically well established. Recently, Bose-Einstein condensates (BECs) of ultracold atoms have been used to test the predictions of cQED. The purpose of the present thesis is to upgrade single-atom cQED with the many-body theory needed to describe trapped atomic BECs. Tools and methods are developed in a second-quantized picture that treats atom and photon fields on

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Divaret, Lise. "U-RANS Simulation of fluid forces exerted upon an oscillating tube array." Thesis, KTH, Farkost och flyg, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-32747.

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The aim of this master thesis is to characterize the fluid forces applied to a fuel assembly inthe core of a nuclear power plant in case of seism. The forces are studied with a simplifiedtwo-dimensional model constituted of an array of 3 by 3 infinite cylinders oscillating in aclosed box. The axial flow of water, which convects the heat in the core of a nuclear powerplant, is also taken into account. The velocity of the axial flow reaches 4m/s in the middle ofthe assembly and modifies the forces features when the cylinders move laterally.The seism is modeled as a lateral displacement with high

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Langer, Sebastian. "Expenditure Interactions between Municipalities and the Role of Agglomeration Forces: A spatial analysis for North Rhine-Westphalia." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-236245.

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This paper analyzes municipal expenditures in the light of horizontal fiscal interactions. I investigate total expenditures and a set of non-earmarked expenditure subcategories in the largest German federal state, North Rhine-Westphalia (NRW). The empirical analysis is based on a Spatial Durbin Model in a panel for the years 2009-2015. Using a two-regime spatial matrix, I also examine the impact of agglomeration on the intensity of public expenditure interactions, thus testing the hypothesis that an agglomerated region can decrease the amount of public goods without losing mobile factors to th

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Anderson, Carl 1943. "Motions driven by buoyancy forces and atmospheric stresses in the Avalon Channel, Newfoundland, Canada." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=72098.

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Currents and sea level fluctuations in the Avalon Channel, driven over a broad range of time scales by buoyancy forces, atmospheric pressure, and wind stress, are described and compared with dynamical theory.<br>Seasonal fluctuations in adjusted coastal sea level at St. John's are shown to be consistent with steric height and bottom pressure variations 3 km offshore in a depth of 180 m.<br>Low frequency fluctuations (periods of 7-50 d) in observed Avalon Channel currents and water properties suggest the presence of a baroclinically-unstable, buoyancy-driven coastal current. A kinematic analysi

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Semin, Benoît. "Interaction d'une fibre et d'un écoulement en géométrie confinée." Phd thesis, Ecole Polytechnique X, 2010. http://pastel.archives-ouvertes.fr/pastel-00006340.

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Le déplacement d'objets allongés dans un fluide se retrouve dans de nombreux domaines tels que la récupération du pétrole, la production du papier ou la nage de micro-organismes. Dans ce travail, nous étudions le comportement d'une fibre cylindrique longue dans un écoulement en géométrie confinée (fracture, canal microfluidique). Dans un premier temps, les forces de trainée exercées sur la fibre ont été déterminées expérimentalement et numériquement en fonction de son orientation et de sa position dans l'ouverture. Lorsque la fibre est parallèle à l'écoulement, elle le perturbe faiblement et u

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Ibargüen, becerra César. "Effet des forces de van der Waals sur la dynamique de l'azote et de l'hydrogène en interaction avec la surface de W(100)." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0261.

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Une littérature scientifique nourrie est consacrée aux processus élémentaires hétérogènes se produisant à l’interface gaz-solide en raison de leur rôle clé dans de nombreux domaines. Ainsi, l’interaction d’atomes et de molécules avec les surfaces revêt une importance primordiale dans l’étude de la catalyse hétérogène, la combustion, la corrosion, le stockage de l’hydrogène, l’industrie automobile et pétrolière, les interactions plasma/paroi dans le contexte du réacteur expérimental thermonucléaire (ITER), les technologies du spatial, la chimie atmosphérique et l’astrochimie, pour citer quelque

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Hawari, Haitham M. "Minimising track degradation through managing vehicle/track interaction." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16366/.

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The rate at which a railway track deteriorates depends on the response of the track under different static and repeated dynamic forces. These wheel/rail forces lead to imperfections in the rail surface and deviation in track geometry alignment. The wheel/rail forces are dependent upon the quality of maintenance of the characteristics of both train and track. If train components such as wheelsets and suspensions are maintained to a high standard, less dynamic forces are generated at the wheel/rail interface and less damage is caused over time. Therefore, the amount and cost of maintenanc

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Senechal, Annie. "Initial stages of adhesion of enterococcus faecalis responsible for biofilm formation on medical devices : quantification of bacterial adhesion and measurement of cell-surface interaction forces." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80142.

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The presence of a microbial biofilm on medical implants and devices remains a serious clinical problem since it can increase the risk of infection. To prevent biofilm formation, it is important to study the initial stages of bacterial adhesion. The aim of this study was to compare the initial interactions of the uropathogen Enterococcus faecalis with different medical grade polymers. To accomplish this, kinetics of E. faecalis adhesion were followed using a DNA quantification assay. The influence of biomaterial surface properties, including surface wettability and roughness, was investigated.

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Essig, Marie. "Interaction entre le cytosquelette et le systeme fibrinolytique : modulation par les inhibiteurs de la 3-hydroxy 3-methylglutaryl coenzyme a reductase et les forces de cisaillement." Paris 7, 1998. http://www.theses.fr/1998PA077207.

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Le systeme fibrinolytique est une cascade proteolytique qui a pour but la degradation de la fibrine et le remodelage de la matrice extracellulaire. Dans le rein, ces deux elements sont impliques dans la progression des lesions renales et a la formation d'une fibrose. La fibrose interstitielle resulte d'un desequilibre entre la synthese et la degradation de la matrice et est un facteur pronostic majeur de la deterioration de la fonction renale. Les mecanismes qui initient ce desequilibre sont un point fondamental a eclaircir pour prevenir la destruction du parenchyme renal. Le cytosquelette par

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Sweetman, Adam. "Forces at the nanoscale : interactions in atomic force microscopy and dielectrophoresis." Thesis, University of Nottingham, 2010. http://eprints.nottingham.ac.uk/11213/.

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Interactions at the nanoscale are governed almost exclusively by electromagnetic forces, but the interplay between different scaling laws produces a vast array of behaviours. We investigate radically different systems spanning almost three orders of magnitude of length scales, and use a variety of experimental techniques to determine the forces present in each regime, and the interplay between them. An important prototypical surface in SPM science has been the Si(100) surface, which due to it’s unstable buckling and complex electronic structure has fostered considerable debate in the surface s

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Hamamda, Mehdi. "Perspectives nouvelles pour l’optique atomique en jets : Interaction de van der Waals-Zeeman et milieux d’indice négatif pour les ondes de matière." Paris 13, 2011. http://www.theses.fr/2011PA132008.

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Dans la première partie de cette thèse, nous développons l’étude expérimentale et théorique d’un type d’interactions à très courte portée (moins de 10nm), dites de van der Waals-Zeeman, entre un atome de gaz rare et une surface métallique. Il s’agit d’utiliser d’une part un jet supersonique d’atomes métastables pour diverse espèces (Ne*, Ar*, Kr*) et, d’autre part, un jet d’argon métastable Ar*(3P2) décéléré par un ralentisseur Zeeman standard. Dans le premier cas, on observe un accroissement de la portée de l’interaction de van der Waals-Zeeman en fonction de l’augmentation de la constante d’

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Ramond, Céline. "Probing the femtosecond dynamics of laser-cluster interaction via X-ray and electron spectroscopy : = Sonder la dynamique sub picoseconde de l'interaction laser agrégats par spectroscopie X et d'électrons énergétiques." Paris 6, 2012. http://www.theses.fr/2012PA066272.

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Ce travail de thèse a consisté en l’étude de la dynamique sub-picoseconde de l’interaction laser-agrégats d’argon par spectroscopie X et d’électrons énergétiques. Une attention particulière à été portée à la mesure précise de l’intensité seuil en éclairement laser nécessaire pour la production de lacune en couche interne. L’évolution de ce paramètre clé avec la durée d’impulsion doit en effet permettre de révéler la compétition temporelle entre les mécanismes de chauffage des électrons et l’expansion de l’agrégat. Ces mesures, réalisées pour deux longueurs d’onde du laser, 400 et 800 nm, ont p

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Semin, Benoît. "Intercation d'une fibre et d'un écoulement en géométrie confinée." Palaiseau, Ecole polytechnique, 2010. http://pastel.archives-ouvertes.fr/docs/00/55/93/59/PDF/these_BSemin.pdf.

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Le déplacement d'objets allongés dans un fluide se retrouve dans de nombreux domaines tels que la récupération du pétrole, la production du papier ou la nage de micro-organismes. Dans ce travail, nous étudions le comportement d'une fibre cylindrique longue dans un écoulement en géométrie confinée (fracture, canal microfluidique). Dans un premier temps, les forces de trainée exercées sur la fibre ont été déterminées expérimentalement et numériquement en fonction de son orientation et de sa position dans l'ouverture. Lorsque la fibre est parallèle à l'écoulement, elle le perturbe faiblement et u

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