Дисертації з теми "COEFFICIENTS FOR INTERACTION"
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Yilmazok, Ozgun. "An Investigation Of Accuracy Of Inertial Interaction Analyses With Frequency-independent Impedance Coefficients." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12609030/index.pdf.
Повний текст джерелаzgü
n M.S., Department of Civil Engineering Supervisor: Assoc. Prof. Dr. B. Sadik Bakir November 2007, 79 pages The inertial interaction between the soil and structure alters dynamic response characteristics of a structure due to foundation deformability, such that the flexibility and energy dissipation capability of surrounding soil may lead to a significant increase in period and damping of structural oscillations. The inertial interaction analyses can be accomplished through utilisation of frequency dependent foundation impedance coefficients that are reported in literature for various soil conditions and foundation types. However, such analyses should be performed in frequency domain, and applicable to only cases that linear structural response is considered. Alternatively, equivalent frequencyindependent foundation impedance coefficients can be employed, such that a constant excitation frequency is assumed in calculation of these coefficients. In this study, it is assumed that the fundamental frequency of a fixed-base structure, which can be obtained through employing available empirical relationships or a modal analysis, can be substituted for excitation terms in impedance expressions. The error induced in calculation of peak structural distortions is investigated through comparisons of structural response due to frequency-dependent and frequency-independent foundation impedance coefficients. For analyses, a linear single-degree of freedom oscillator is considered for modeling the structure. The frequency-dependent impedance of a rigid disk foundation resting on elastic halfspace is simulated by a limited number of discrete elements. The response calculations are performed in frequency domain, through employing 72 acceleration records. It is concluded that, the natural frequency of fixed-base building can be considered as effective excitation frequency for calculation of foundation impedance coefficients, when the effect of inertial interaction on structural response is moderate. Through employing equivalent-linear approximation for the structural response, it is shown that the conclusion is also valid in cases that nonlinear structural response is considered. However, when the inertial interaction has more profound effects on the structural response, the use of natural frequency of flexible-base structure, which is calculated iteratively due to its dependence on foundation-impedance factors is recommended.
Ticona, A. M., M. A. Rosales, and J. D. Orihuela. "Correction coefficients of distortion and vibration period for buildings due to soil-structure interaction." OP Publishing Ltd, 2020. http://hdl.handle.net/10757/656571.
Повний текст джерелаRandall, Richard John. "Fluid-structure interaction of submerged shells." Thesis, Brunel University, 1990. http://bura.brunel.ac.uk/handle/2438/5446.
Повний текст джерелаNordanstorm, Nika. "Evaluation of distribution coefficients (KOC and Kd) for per- and polyfluoroalkyl substances." Thesis, Linnéuniversitetet, Institutionen för biologi och miljö (BOM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-101693.
Повний текст джерелаStamos, Dimitrios Georgios. "Experimental Analysis of the Interaction of Water Waves With Flexible Structures." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/27567.
Повний текст джерелаPh. D.
Crofoot, Robert F. "Investigations of scalar transfer coefficients in fog during the Coupled Boundary Layers and Air Sea Transfer Experiment : a case study." Thesis, Monterey, California. Naval Postgraduate School, 2004. http://hdl.handle.net/10945/1202.
Повний текст джерелаBOULANGER, DANIEL. "Theorie du champ de ligandes des coefficients de couplage orbite-reseau et spin-reseau des ions d**(5) dans les composes ii-vi." Paris 6, 1988. http://www.theses.fr/1988PA066098.
Повний текст джерелаMahfouf, Ali. "Calcul des coefficients de transport dans des plasmas hors de l'équilibre." Thesis, Clermont-Ferrand 2, 2016. http://www.theses.fr/2016CLF22719/document.
Повний текст джерелаTransport properties at high temperature in gases and/or in plasmas are of very importance in various fields, namely in the field of breaking technology in arc, cutting plasma, welding or burning. Knowledge of transport coefficients is necessary for any modeling involving hydrodynamic equations. As part of the kinetic theory of diluted gas, an approximate solution of the integro-differential Boltzmann equation governing distribution functions was proposed by Chapman-Enskog. Transport coefficients are classically computed using the method of Chapman-Enskog through the collision integrals. In our study we have developed, initially, a numerical code to obtain these collision integral taking into account the singularities that may occur in the calculation of the cross sections relating to interactions between particles forming the gas and/or plasmas. Secondly, we have studied the influence of the choice of parameters of interaction potentials on transport coefficients. Subsequently, we have used the numerical code developed for evaluating and helium plasma transport coefficients by studying the influence of the choice of method for calculating chemical composition on these coefficients. Finally, a simplified model of an interaction between an electromagnetic wave and a helium plasma has been proposed as a direct application of the transport coefficients
Crofoot, Robert Farrington. "Investigations of scalar transfer coefficients in fog during the Coupled Boundary Layers and Air Sea Transfer experiment : a case study." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/39165.
Повний текст джерелаIncludes bibliographical references (leaves 70-72).
The uncertainty in the determination of the momentum and scalar fluxes remains one of the main obstacles to accurate numerical forecasts in low to moderate wind conditions. For example, latent heat fluxes computed from data using direct covariance and bulk aerodynamic methods show that there is good agreement in unstable conditions when the latent heat flux values are generally positive. However, the agreement is relatively poor in stable conditions, particularly when the moisture flux is directed downward. If the direct covariance measurements are indeed accurate, then they clearly indicate that the bulk aerodynamic formula overestimate the downward moisture flux in stable conditions. As a result, comparisons of the Dalton number for unstable and stable conditions indicate a marked difference in value between the two stability regimes. Investigations done for this thesis used data taken primarily at the Air-Sea Interaction Tower (ASIT) during the Coupled Boundary Layers and Air-Sea Transfer (CBLAST) Experiment 2003 from the 20-27 August 2003. Other data from the shore based Martha's Vineyard Coastal Observatory (MVCO) and moored buoys in the vicinity of the ASIT were also incorporated.
(cont.) During this eight day period, the boundary layer was often characterized by light winds, a stably stratified surface layer and a swell dominated wave field. Additionally, the advection of warm moist air over cooler water resulted in fog formation and a downward flux of moisture on at least three occasions. Therefore, a primary objective of this thesis is to present a case study to investigate the cause of this shortcoming in the bulk formula under these conditions by examining the physical processes that are unique to these boundary layers. Particular attention will be paid to the behavior of the Dalton number in a stable marine atmospheric boundary layer under foggy conditions using insights derived from the study of fog formation and current flux parameterization methods.
by Robert Farrington Crofoot.
S.M.
Ullberg, Malin. "Effects of pH and Cation Composition on Sorption of Per- and Polyfluoroalkyl Substances (PFASs) to Soil Particles." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-256415.
Повний текст джерелаPer- och polyfluoroalkylsubstanser (PFAS:er) har dragit stor uppmärksamhet till sig på senare tid, på grund av deras persistenta egenskaper, potentiella toxicitet och globala utbredning. PFAS är en stor grupp ämnen, kännetecknad av en perflourinerad kolkedja och en funktionell grupp. Alla PFAS är syntetiska och har använts i stor utsträckning sedan 1950-talet på grund av deras unika egenskaper av att vara både vatten- och fettavstötande, vilket gör dem användbara för många industriella tillämpningar. För att kunna förutsäga var dessa föroreningars hamnar i miljön och få mer detaljerad förstående för transportprocesserna, måste deras fördelningbeteende mellan jordpartiklar och vattenundersökas för en rad olika parametrar. Syftet med denna studie var att undersöka effekterna av förändrat pH, katjonsammansättning, funktionell grupp och perfluorkolkedjelängd på sorption av PFAS:er till jordpartiklar. Detta gjordes med sorptionsexperiment i laboratorieskala. Laboratorieexperimentet kompletterades med modellering av nettoladdning, för att se huruvida detta väl kunde förklara sorptionen till jordpartiklar. 14 PFAS:er av varierande längd och med tre olika funktionella grupper studerades (PFBA, PFPeA, PFHxA, PFHpA, PFOA, PFNA, PFDA, PFUnDA, PFDoDA, PFTeDA, PFBS, PFHxS, PFOS och FOSA). Effekten på sorption av Na+, Ca2+ (två olika koncentrationer) och Al3+ undersöktes vid pH-intervallet 3-6. Modellering av nettoladdning utfördes i den geokemiska modellen Visual MINTEQ. Jorden som användes hade en halt av organiskt kol på 45%. Adsorptionen av PFAS:er var starkt positivt korrelerad med kedjelängden på de perfluorinerade kolkedjan. Ju längre kolkedja (dvs. mer hydrofob), desto starkare adsorption till partiklar. Relationen mellan sorptionen (här uttryckt som partitioneringskofficienten log Kd) och kedjelängd var linjär för alla PFSA och för C3 till C10 för PFCA. PFSA (sulfonat) adsorberade starkare än PFCA (karboxyl), och FOSA (sulfonamid) adsorberades starkast. För de flesta PFCA, (C5-C13) fanns en allmän trend där log Kd (dvs. sorption) minskade med ökande pH, på grund av pH-beroende förändringar på jordpartiklarna. För korta och medellånga PFCA (C5-C8) och för PFHxS hade katjonsammansättningen en tydlig effekt på sorptionen. Aluminiumjoner (trevärd, Al(NO3)3) hade den största effekten, följt av kalcium (tvåvärd, Ca(NO3)2) där den högre koncentrationen resulterade i starkare sorption. Natrium (envärd, NaNO3) hade minst påverkan på sorptionen till jordpartiklar. Visual MINTEQ tar hänsyn till många parametrar (inklusive pH), när nettoladdningen på jordpartiklarnas yta räknas ut. När log Kd för olika PFAS:er jämfördes med endera pH eller negativ nettoladdning, drogs slutsatsen att nettoladdning korrelerade bättre med sorption än pH.
Wiranata, Anton. "Transport Coefficients of Interacting Hadrons." Ohio University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1314733650.
Повний текст джерелаJacob, Xavier. "Applications de l' interaction d' ondes élastiques à la mesure des propriétés non linéaires des matériaux et à la caractérisation de champs de pression." Paris 7, 2005. http://www.theses.fr/2005PA077030.
Повний текст джерелаCostenaro, Lionel. "Interactions faibles protéine – protéine en solution : La malate déshydrogénase halophile." Phd thesis, Université Joseph Fourier (Grenoble), 2001. http://tel.archives-ouvertes.fr/tel-00007698.
Повний текст джерелаDans quelle mesure les interactions protéine – solvant influencent-elles les interactions protéine – protéine ? Nous avons mis en relation ces deux types d'interactions pour la malate déshydrogénase (Hm MalDH) de Haloarcula marismortui, protéine halophile très acide qui a des solvatations variées et très riches en eau et en sel.
Nous avons développé une nouvelle méthode de détermination du second coefficient du viriel A2 par la modélisation des profils de vitesse de sédimentation en ultracentrifugation analytique, qui permet l'étude de solvants complexes.
Les interactions protéine – protéine de la Hm MalDH en divers sels ont été caractérisées par diffusion de neutrons ou de rayons X aux petits angles. Les A2 et les facteurs de structure en solution ont été modélisés par des potentiels d'interaction de type DLVO. Les interactions répulsives sont principalement dues au terme de volume exclu et dans une moindre mesure au terme électrostatique. Les interactions attractives sont qualitativement corrélées à des valeurs positives ou négatives des paramètres d'interaction préférentielle avec le sel. Ces résultats permettent d'expliquer l'adaptation moléculaire des protéines halophiles qui doivent ainsi avoir une solvatation riche en sel pour rester soluble à haut sel.
La cristallisation par dilution de la Hm MalDH dans des mélanges sel – MPD (méthyl-2-pentanediol-2,4) résulte d'une lente évolution des interactions protéine – protéine, de répulsives à modérément attractives. Le MPD modifie les interactions protéine – protéine en divers sels en ajoutant une attraction qui est liée à la répulsion du MPD par les charges de la protéine.
Milesi, Paul. "Interactions between waves and new generations of brakewaters with small footprint." Thesis, Ecole centrale de Marseille, 2019. http://www.theses.fr/2019ECDM0003/document.
Повний текст джерелаNowadays the respect of the environment is an obligation in maritime works. Vertical concrete caissons with porous plates are often the number one technical solution to enlarge existing ports and/or to improve the agitation of the basins. The footprint is reduced and the demand in quarry materials is less important compared to classical riprap breakwaters. Recently, alternative systems to vertical concrete caissons have been designed. Vertical riprap breakwaters are made of a metal framework enclosing blocks. This kind of structure offers environmental benefits, permeability for currents and a good hydrodynamic performance. This thesis work looks at developing a new 3D-BEM code that is easy to use and integrates porous media. Innovative geometries are tested like spaced gabions with damping chamber or a mix of porous plates and porous media.Describing flows in porous media is an complex issue. Volume averaging method is the common mathematical process used to model porous media flows without drawing every grain of a porous medium. The well-known extended Forchheimer equation describes the volumetric forces applied to the flow by a porous medium through resistance and inertial coefficients. These researches were the occasion to look into this coefficients, especially the one of poorly understood inertia in the case of a porous medium. It plays a major role in very low-KC flows currently occurring in porous breakwaters apart from armour layer.First, a literature review on porous media flows was undertaken. In parallel, the numerical code called Diffra3D was produced. It was then used to look for resistance coefficients of porous media through data coming from three experimental campaigns : one sloshing test on hexapode and two classical reflection-transmission studies in a wave tank. These campaigns were also the occasion to test and calibrate the code. New geometries of porous structures were then tested experimentally and numerically. Two new values of resistance coefficients of a porous medium are proposed. Some interesting features concerning the inertia coefficient CM of a porous medium are also developed. In simulations, we observe that the hydrodynamic behaviour of porous structures in low-KC flows is very sensitive to the coefficient of inertia. This research topic would still deserve further studies in order to find empirical law(s) for the inertia coefficient of a porous medium. The code Diffra3D performs well to model porous media flows. However, it is limited to waves with low steepness. The challenge is to properly characterise the porous medium. This research has shown that innovative porous structures like spaced gabions have proven their place as environmentally-friendly damping breakwaters. They may be commonly used in the future
Ma, Yingfang. "Long-range Interactions and Second Virial Coefficients of Biomolecular Materials." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1416915622.
Повний текст джерелаMokeddem, Abdelhammid. "Modélisation géomécanique et probabiliste des rideaux de palplanches : prise en compte de l’interaction sol-structure et de la variabilité spatiale du sol." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0057/document.
Повний текст джерелаThe geomechanical behaviour of geotechnical structures such as sheet pile walls is subjected to epistemic uncertainties due to geomechanical models’ assumptions and also the aleatory uncertainties which could be related to the soil spatial variability. The main objective of this thesis is to gain more insight into the effect of these uncertainties on the sheet pile behaviour. To this end, this thesis focuses on four main issues: The first one is related on the one hand to the analysis of the used geomechanical hypotheses for modelling of retaining walls. On the other hand, to extend the one-dimensional subgrade reaction method which is based on a beam relying on elastoplastic supports to a two-dimensional system that call to an orthotropic plate relying on the same supports (MISS-CR-PLQ). The second issue concerns the soil spatial variability modelling. After a key comparison between two random field generation methods, we selected the Circulating Embedding method for its efficiency. Several parametric studies have been conducted to analyse the effects of different assumptions of random field generation. The third issue is related to the implementation of the proposed mechanical-reliability approach taking into account the soil spatial variability. The last issue is devoted to the application of the developed approach to a case study through probabilistic and reliability analyses. The influence of statistical parameters (e.g. correlation lengths, cross-correlation,...), mechanical and geometrical has been examined
Mansoori, Behzad. "Tannin/protein interactions : effects on digestibility coefficients and endogenous losses in broilers." Thesis, University of Aberdeen, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301201.
Повний текст джерелаJeong, Dahai. "Laboratory Measurements of the Moist Enthalpy Transfer Coefficient." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_theses/145.
Повний текст джерелаMacCuaig, Neil. "Precision measurements of gamma-ray attenuation coefficients in the energy range 15-1500 keV." Thesis, University of Surrey, 1986. http://epubs.surrey.ac.uk/847664/.
Повний текст джерелаByars, Beverly J. "Variation of the drag coefficient with wind and wave state." Thesis, Monterey, Calif. : Naval Postgraduate School, 1985. http://catalog.hathitrust.org/api/volumes/oclc/52763691.html.
Повний текст джерелаHeckmann, Klaus Verfasser], Jochen [Akademischer Betreuer] [Wambach, and Michael [Akademischer Betreuer] Buballa. "Transport coefficients of strongly interacting matter / Klaus Heckmann. Betreuer: Jochen Wambach ; Michael Buballa." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2011. http://d-nb.info/1105562417/34.
Повний текст джерелаHeckmann, Klaus [Verfasser], Jochen [Akademischer Betreuer] Wambach, and Michael [Akademischer Betreuer] Buballa. "Transport coefficients of strongly interacting matter / Klaus Heckmann. Betreuer: Jochen Wambach ; Michael Buballa." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2011. http://nbn-resolving.de/urn:nbn:de:tuda-tuprints-25889.
Повний текст джерелаVan, de Steen Cyril. "Modélisation des propriétés de transport des ions moléculaires de krypton et xénon pour l'optimisation des générateurs de plasma froids utilisant les gaz rares." Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30264/document.
Повний текст джерелаThe use of cold plasmas based on rare gases (Rg) in biomedical applications as well as in space propulsion is clearly evolving. To optimize these plasma reactors, a fine understanding of the processes taking place in these reactors is necessary. This thesis aims to provide the missing data in the literature (transport coefficients and reaction rates) through mesoscopic data (cross-sections) obtained from microscopic data (interaction potentials) for xenon and krypton in their parent gas. Only cold plasmas composed of a single type of atom are considered. As krypton and xenon are rare gases, and so have, in the neutral state little / no interaction between them. Therefore, only ion - atom collisions will be considered. Due to the low ion energies in the cold plasma, only the first 6 excited states of the Rg2+ pair will be taken into account. These 6 states will be classified in two groups, 2P1/2 and 2P3/2. In this work, two different interaction potentials available in the literature are used and compared for the Kr+/Kr and Xe+/Xe collision systems in the calculation of cross-sections. For collisions involving ionic dimers (Kr2+/Kr and Xe2+/Xe), the interaction potentials are calculated from the DIM model (Diatomics In Molecules) which is a combination of the atomic potentials of neutral - neutral and ionic - neutral interactions. The cross-sections required to obtain the missing mesoscopic data are calculated from three different methods. The first method is the quantum method which allows, by a resolution of the Schrödinger equation, to obtain exactly the cross-sections from the interaction potentials. This exact method, which consumes a lot of computation time, is used as a reference to validate the two other approximate methods. The second method, called semi-classical, is based on the same expression as the quantum cross section but uses an approximate phase shift (JWKB approximation), induced by the interaction potential, between the scattered wave and the incident wave. [...]
Okambawa, Richard. "Étude expérimentale des interactions moléculaires gaz-gaz et gaz-adsorbant à partir des coefficients du viriel thermophysiques et des coefficients du viriel de la constante diélectrique /." Thèse, Trois-Rivières : Université du Québec à Trois-Rivières, 1999. http://www.uqtr.ca/biblio/notice/resume/03-2208187R.html.
Повний текст джерелаEn-tête de titre : Université du Québec. Institut national de la recherche scientifique (Énergie et matériaux). "Cette thèse a été réalisée à l'Université du Québec à Trois-Rivières... dans le cadre du programme du doctorat en sciences de l'énergie et des matériaux de l'Institut national de recherche scientifique-Énergie et matériaux extensionné à l'Université du Québec à Trois-Rivières." CaQTU CaQTU Comprend des références bibliogr.
Okambawa, Richard. "Étude expérimentale des interactions moléculaires gaz-gaz et gaz-adsorbant à partir des coefficients du viriel thermophysiques et des coefficients du viriel de la constante diélectrique." Thèse, Université du Québec à Trois-Rivières, 1999. http://depot-e.uqtr.ca/6713/1/000664973.pdf.
Повний текст джерелаJacob, Xavier. "Applications de l'interaction d'ondes élastiques à la mesure des propriétés non-linéaires des matériaux et à la caractérisation de champs de pression." Phd thesis, Université Paris-Diderot - Paris VII, 2005. http://pastel.archives-ouvertes.fr/pastel-00001301.
Повний текст джерелаYang, Xin. "Study of the hydrogen-tungsten interaction for fusion : measurement of the atomic reflection coefficient by laser spectroscopy." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0232.
Повний текст джерелаPlasma surface interaction (PSI) is considered to be one of the key scientific challenges in nuclear fusion. The interaction between hydrogen isotopes and plasma-facing materials such as tungsten is of particular importance. The atomic hydrogen isotope surface loss coefficient (γ) is a key point in PSI studies. It can give information on hydrogen isotope inventory and is an important input for modeling and theoretical work. The aim of this project is to determine atomic hydrogen and deuterium surface loss coefficients on tungsten (W) sample by using two-photon-absorption laser induced fluorescence (TALIF) and pulsed induced fluorescence (PIF) technique. This project is carried out in CAMITER reactor which is a low-pressure radio-frequency ICP reactor at PIIM laboratory in Aix-Marseille University
Verma, Kusum S. "The osmotic second virial coefficient as a predictor of protein stability." Master's thesis, Mississippi State : Mississippi State University, 2006. http://sun.library.msstate.edu/ETD-db/ETD-browse/browse.
Повний текст джерелаCarlstedt, Emelie. "Soil‐structure interaction for bridges with backwalls : FE‐analysis using PLAXIS." Thesis, KTH, Bro- och stålbyggnad, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-36798.
Повний текст джерелаBro 2004, BV Bro och Eurocode ger råd för hur jordtryck som uppkommer på grund av temperaturändring och bromskraft skall tas hänsyn till vid dimensionering av ändskärmar. I detta examensarbete undersöks dessa dimensioneringskrav med hjälp av PLAXIS för att göra en bedömning av jordtrycket. Resultaten visar att modellen i PLAXIS överensstämmer ganska väl med de konventioner som ges i Bro 2004 och att PLAXIS ger tillförlitliga resultat. Kravet att ändskärmar alltid ska dimensioneras för passivt jordtryck visade sig vara pessimistiskt. I fall med långa broar och korta ändskärmar nås ofta passivt jordtryck men för kortare broar med djupare ändskärmar är detta nästan aldrig fallet. PLAXIS visade sig vara känsligt för hur modellen byggs upp och vilka indata som ändvänds, varför dessa bör väljas försiktigt. En modell i PLAXIS medför inte en mer effektiv dimensionering men kan vara ett bra verktyg för analys av jordtryck i kombination med andra effekter så som förskjutningsmönster samt moment- och kraftdiagram.
Trapp, Jamie Vincent. "Imaging and radiation interactions of polymer gel dosimeters." Thesis, Queensland University of Technology, 2003. https://eprints.qut.edu.au/15904/1/Jamie_Trapp_Thesis.pdf.
Повний текст джерелаTrapp, Jamie Vincent. "Imaging And Radiation Interactions Of Polymer Gel Dosimeters." Queensland University of Technology, 2003. http://eprints.qut.edu.au/15904/.
Повний текст джерелаPatil, Deepak C. "Particle Interactions in Industrial Granular Systems: Experiments, Theory, and Simulations." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/915.
Повний текст джерелаQureshi, Tabussom. "Studying Transmembrane Helix Interactions in SDS micelles." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34417.
Повний текст джерелаJouenne, Eric. "Etude des interactions entre la bêta-lactoglobuline et les composés d'arôme." Montpellier 2, 1997. http://www.theses.fr/1997MON20066.
Повний текст джерелаKumar, Pawan. "Studies of wire-matrix interaction in some tungsten wire reinforced stainless steels." Thesis, University of Canterbury. Mechanical Engineering, 2013. http://hdl.handle.net/10092/8980.
Повний текст джерелаBarbosa, Christophe. "Experimental and numerical study of the interaction of a bubble with an inclined wall." Thesis, Toulouse, INPT, 2016. http://www.theses.fr/2016INPT0122.
Повний текст джерелаThe objective of the thesis is to study the interaction of a high Reynolds moderate Weber numberbubble with an inclined wall. For a given bubble-liquid combination, an increase of the inclinationangle results in a transition from a steady sliding motion to periodic bounces. An experimentaldevice was designed and built to generate the collision of bubbles in terminal state conditions withan inclined wall, with inclination angles ranging from 5 to 80. Experiments were conductedconsidering different liquid and bubble diameters. The bubble shape and position was recordedusing a high speed camera whereas the wake behavior was captured using a time resolved Particle Image Velocimetry technique. In addition, the interaction process was also studied using anumerical code. Considering a force balance on the sliding bubble, that takes into account theviscous or inertial nature of the drag force, the sliding and bouncing motions were wellcharacterized and validated by the experimental results. The inertial sliding and bouncing motionswere associated to a constant tangential Froude number. As for the viscous sliding motion, the corresponding drag coefficient was satisfactorily modelled through the additive effects of thepotential-flow wall effect and the vorticity production at the wall. Through the same force balance projected along the normal axis, a set of relations were obtained for the transition from sliding tobouncing motions. The wake induced lift force results to be of major importance for the transitioncriteria. The different phases that characterize the oblique collision were analyzed. Accordingly,the initial and final times for the process were chosen. On this basis, models for the normal and tangential coefficient of restitutions were proposed and numerically supported. The numericalsimulations reproduced the different aspect of the bubble inclined wall interaction
Mouawad, Charbel. "Transfert de matière dans un système solide/liquide "ions/eau/pectine" : interactions, partage ionique et simulation par dynamique moléculaire." Thesis, Vandoeuvre-les-Nancy, INPL, 2007. http://www.theses.fr/2007INPL072N/document.
Повний текст джерелаLes transferts de matière intervenant au cours du procédé d’immersion dépendent essentiellement de la taille des produits immergés, la température, la concentration et la nature de la solution d'immersion. L’objectif principal de ce travail porte sur l’étude des transferts dans un système solide/liquide constitué d’un produit végétal (aubergine) et d’une solution saline. Afin de parvenir à une bonne maîtrise de ces paramètres, les études cinétiques ont été conduites à 3°C sur des aubergines immergées dans des solutions salines avec deux concentrations. Les propriétés des solutions et des sels telles que la concentration molaire, la masse molaire et surtout la nature ionique influencent le mécanisme de perte et de gain. Les connaissances sur les interactions ions/pectines végétaux sont importants pour la formulation de nouveaux produits La détermination du coefficient de partage des ions à l’équilibre dans le système aubergine/solution ont montré que les principales propriétés des ions et des solutions influençant le coefficient de partage sont le rayon ionique, l’électronégativité, la force ionique et la concentration molaire. Un modèle mathématique a permis de prédire le coefficient de partage des ions dans ce système. Dans le but d’expliquer l’absorption des ions par la phase solide, une simulation par dynamique moléculaire a été menée sur un système pectine-eau-sels. Quatre systèmes ont été utilisés. Les résultats obtenus ont montré que la nature ionique influencent la nature et le nombre d’interaction entre pectine-ion et eau-ion et donc offrent une description explicite des phénomènes de transferts et distribution des ions dans le système solide/liquide
Ozvenchuk, Vitalii [Verfasser], Elena [Akademischer Betreuer] Bratkovskaya, and Marcus [Akademischer Betreuer] Bleicher. "Dynamical equilibration and transport coefficients of strongly interacting matter / Vitalii Ozvenchuk. Gutachter: Elena Bratkovskaya ; Marcus Bleicher. Betreuer: Elena Bratkovskaya." Frankfurt am Main : Univ.-Bibliothek Frankfurt am Main, 2013. http://d-nb.info/1043978216/34.
Повний текст джерелаMiller, Mark Stephen. "Use of osmotic coefficient measurements to validate and to correct the interaction thermodynamics of amino acids in molecular dynamics simulations." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6476.
Повний текст джерелаWang, Xianjie. "Interactions of ozone and acetic acid with natural Gobi dust." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS412.
Повний текст джерелаThis PhD thesis investigates the interactions of ozone and acetic acid with a natural mineral dust from Gobi Desert in China, under room temperature, atmospheric pressure, dry and wet conditions, using post-situ and in-situ characterization techniques to address gas phase and adsorbed phase species. First, ozone uptake at the surface of Gobi dust is investigated over a large ozone concentration range (20 ppb – 10 ppm) to provide new insights on the heterogeneous processes of ozone with potential interest for both atmospheric chemistry and industrial frameworks. Gobi dust exhibits catalytic properties regarding ozone decomposition with a steady-state uptake coefficient ranging from 2.6 10-9 to 6.2 10-8 depending on ozone concentration. Water molecules compete with ozone for the same surface sites while thermal treatment at 150˚C can significantly regenerate the surface sites after surface exposure to ozone. Second, the physisorptive and chemisorptive interaction modes of acetic acid on Gobi dust have been studied evidencing the formation of molecularly adsorbed acetic acid in monomer and dimer forms as well as bidentate chelating acetate. The amount and the partition of reversibly and irreversibly adsorbed fractions of acetic acid taken up on Gobi dust exhibit contrasted behaviors under dry and 20% RH conditions. Finally, the oxidation of adsorbed acetic acid by ozone at the surface of Gobi dust is investigated to typify the ability of that geo-material to act as a catalyst of interest
Pujol, Céline. "Hydrodynamique et brisure de symétrie chirale : application au gaz de pions et calcul de coefficients de transport." Phd thesis, Université Claude Bernard - Lyon I, 2003. http://tel.archives-ouvertes.fr/tel-00006288.
Повний текст джерелаGhendrih, Philippe. "Effet du champ magnétique sur les interactions coulombienes dans un plasma chaud modification de l'équation cinétique et des coefficients de transport /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37605405d.
Повний текст джерелаVivares, Denis. "Interactions en solution et cristallisation de l'urate oxydase." Paris 6, 2003. http://www.theses.fr/2003PA066336.
Повний текст джерелаMery, Alain. "Mesure du coefficient de corrélation angulaire béta-neutrino dans la décroissance de l’6He à l’aide d’un piège de Paul." Caen, 2007. http://www.theses.fr/2007CAEN2018.
Повний текст джерелаThe central topic of this work is the study of the properties and the implementation of a Paul trap used for the measurement of the beta-neutrino angular correlation parameter in the decay of 6He. This coefficient provides a signature of the nature of the interactions involved in the weak interaction. The value of this coefficient can be deduced from the kinematical distribution of the decay events. An electromagnetic trap is used for the trapping of 6He+ ions in a small volume. This trap has an open geometry that enables the detection in coincidence of the electron and the recoil ion emitted in the beta decay. A dedicated detection set up is used for the measurement of the electron energy, the ion time of flight and the position of the two particles for each event. A general description of the LPCTrap facility and of its performances is presented and shows that this set up is able to fulfill the proposed measurement. Especially, a comparison is made between the characteristics of the ion cloud obtained from Monte Carlo simulations and the experimental measurements with a good agreement. More than 100 000 coincident events have been recorded during the first experiment. A preliminary analysis of these results is shown. It includes a description of the different observables as well as a comparison between the experimental time of flight spectrum and the simulated spectrum. These data will allow a measurement of the angular correlation parameter with a statistical error smaller than 2 %
Jiemchooroj, Auayporn. "First-principles calculations of long-range intermolecular dispersion forces." Licentiate thesis, Linköping : Dept. of Electrical Engineering, Linköping University, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7512.
Повний текст джерелаMouawad, Charbel Desobry Stéphane. "Transfert de matière dans un système solide/liquide "ions/eau/pectine" interactions, partage ionique et simulation par dynamique moléculaire /." S. l. : S. n, 2007. http://www.scd.inpl-nancy.fr/theses/2007_MOUAWAD_C.pdf.
Повний текст джерелаSalhani, Chloé. "Exploring thermoelectricity and electronic transport of molecular layers." Thesis, Université de Paris (2019-....), 2020. http://www.theses.fr/2020UNIP7013.
Повний текст джерелаProgress in material science over the past half-century has been engaged in a constant race towards miniaturization. At the scales where quantum effects dominate the physics at play, molecular electronics has been considered a promising field of study, proposing to exploit quantum physics to achieve the desired functionality of a molecular device. In this thesis, I investigate electronic and thermoelectric properties of large-area solid-state molecular junctions, devices constructed of robust and covalently-grafted molecular layers formed by multiple molecular chains containing several molecular units in series contacted between metallic electrodes. A first part of this thesis concerns the investigation of inelastic el-ph interactions in layers of anthraquinone (AQ). The AQ molecule exhibits quantum interference (QI) effects, causing an extinction of the transmission function (and thus the conductance) near the zero-bias point and thus enhancing the visibility of inelastic effects (el-ph interactions). IETS spectroscopy is performed on these layers and allows to identify known vibrational modes of the AQ molecule. A second part of this work investigates the thermoelectric properties of similar molecular layers (using AQ, BTB and NB molecules). Engineering challenges are met with the development of a new sample geometry using an AuGe thin-film alloy as a heater-thermometer element, to enable establishing a controlled temperature gradient across the thickness of the molecular layer (~15nm). Finally, I explore the presence of a thermoelectric potential developed across the molecular layer. A third and final part of this thesis explores a new geometry for large area molecular junctions. Instead of a bottom-up approach, nanotrenches are used to fabricate in-plane molecular junctions in a geometry designed to allow gate integration at a later stage. I present the fabrication of these nanotrenches using a shadow-edge mask method, and their characterization before and after molecular grafting. AQ-grafted nanotrenches reveal typical transport signatures of molecular junctions that are compared to the behavior of the more standard planar fabrication
Lindgren, Kristina. "The Behaviour of the Latent Heat Exchange Coefficient in the Stable Marine Boundary Layer." Thesis, Uppsala University, Department of Earth Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9140.
Повний текст джерелаKnowledge of the turbulent fluxes at the sea surface is important for understanding the interaction between atmosphere and ocean. With better knowledge, improvements in the estimation of the heat exchange coefficients can be made and hence models are able to predict the weather and future climate with higher accuracy.
The exchange coefficients of latent and sensible heat during stable stratification vary in the literature. Therefore it is necessary to investigate the processes influencing the air-sea exchange of water vapour and heat in order to estimate these values. With measurements from a tower and a directional waverider buoy at the site Östergarnsholm in the Baltic Sea, data used in this study have been sampled from the years 2005-2007. This site represents open-ocean conditions during most situations when the wind comes from the south-east sector. The neutral exchange coefficients, CEN and CHN, have been calculated along with the non-dimensional profile functions for temperature and wind to study the dependence of stability and other parameters of relevance.
It was found that CEN increased slightly with wind speed and reached a mean value of approximately 1.45×10-3. The highest values of CEN were observed during near neutral conditions and low wave ages. CHN attained a mean value of approximately 0.77×10-3 and did not show any relation to wind speed or to wave age. No significant dependence with wind or wave direction could be shown for either CEN or CHN in the sector 80-220°. The stability correction, performed to reduce the dependence on stratification for CEN and CHN, was well performed for stabilities higher than 0.15. The stability is represented by a relationship between the height and the Obukhov-length (z/L).
Validity of the non-dimensional profile functions for temperature and wind showed that, for smaller stabilities, these functions gave higher values than the corresponding functions recommended by Högström (1996). The profile funtions for temperature was shown to have a larger scatter while the profile functions for wind was less scattered and deviated more from the functions given by Högström
Kunskap om turbulenta flöden i det marina gränsskiktet är viktigt för att förstå växelverkan mellan atmosfär och hav. Med bättre kunskap kan förbättringar i bestämningen av utbyteskoefficienterna för latent och sensibelt värme erhållas. Det medför att modeller kan prognostisera väder och framtida klimat med högre noggrannhet.
Utbyteskoefficienterna för latent och sensibelt värme har för stabil skiktning olika värden i litteraturen. Detta gör det nödvändigt att undersöka de processer som påverkar utbytet av vattenånga och värme mellan luft och hav för att kunna bestämma dessa värden. Data som har använts i den här studien insamlades mellan år 2005 och 2007 från en boj och ett torn vid mätplatsen Östergarnsholm i Baltiska havet. För det flesta situationer, när vinden blåser från syd-ost, representerar mätplatsen ett förhållande likvärdigt det över öppet hav. De neutrala utbyteskoefficienterna, CEN och CHN, och de dimensionslösa profilfunktionera för temperatur och vind, och , har beräknats för att studera beroendet av stabilitet samt andra relevanta parametrar.
Beräkningarna visade att CEN ökade något med vindhastighet och hamnade på ett medelvärde av ungefär 1.45×10-3. De högsta värdena på CEN observerades vid nära neutrala förhållanden och låga vågåldrar. CHN uppmättes till att ha ett medelvärde på ungefär 0.77×10-3 och uppvisade inget beroende med vindhastighet eller vågålder. Inget märkbart beroende med vind- eller vågriktning kunde visas för CEN eller CHN i sektorn 80-220°. Stabilitetskorrektionen, utförd för att reducera beroendet av atmosfärens skiktning för CEN och CHN, var bra för stabiliteter högre än 0.15. Stabiliteten representeras av förhållandet mellan höjden och Obukhov-längden (z/L).
Utvärdering av de dimensionslösa funktionerna för temperatur och vind visade att dessa funktioner, för små stabiliteter, gav högre värden än motsvarande funktioner som rekommenderas av Högström (1996). Värdena på profilfunktionerna för temperatur hade större spridning än värdena på profilfunktionerna för vind och avvek mer från funktionerna givna av Högström.
Gandhi, Shikha. "Investigation Of The Effect Of Low Molecular Weight Peg On Lysozyme Interactions In Solution Using Composition Gradient Static Light Scattering." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1204599050.
Повний текст джерелаShaghaghi, Tahereh. "FEM and XFEM approaches to Investigate the Hydromechanical Interactions within a jointed soft-rock slope." Thesis, Federation University Australia, 2020. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/177426.
Повний текст джерелаDoctor of Philosophy