Дисертації з теми "Extended surface"
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Robertson, Andrew J. "Extended surface flow and heat transfer studies." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302219.
Повний текст джерелаMalone, Philip E. "Surface ship shock modeling and simulation extended investigation /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA386401.
Повний текст джерелаThesis advisor, Shin, Young S. "December 2000." Includes bibliographical references (p. 87-88). Also available in print.
Ainsworth, S. "Surface EXAFS (extended X-ray absorption fine structure) studies of adsorbates on surfaces." Thesis, University of Warwick, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377090.
Повний текст джерелаZhang, Jinhong. "Surface Forces between Silica Surfaces in CnTACl Solutions and Surface Free Energy Characterization of Talc." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/29997.
Повний текст джерелаPh. D.
Gensure, John Reynold. "Extended surface heat sinks for electronic components: a computer optimization." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23672.
Повний текст джерелаHeat sinks consisting of individual fins and arrays of fins are used extensively throughout the Navy and industry. The fins serve to increase the surface area thorough which heat is transferred to the surrounding environment by natural convection. Extended surfaces or fins are commonly found on electronic components ranging from power supplies to transformers. The dissipation and subsequent rejection of potentially destructive self produced heat is an important aspect of electronic equipment design. Fin design theory is examined starting with the optimization of individual fin dimensions. The insights obtained are utilized in an investigation of the optimal number and spacing of elements in an array of fins. The results are implemented in a computer program written in ADA and compiled for use on IBM compatible machines. The program takes as inputs thermal and physical data and outputs an optimized fin configuration. Menu driven, the program is easily employed without any amplifying documentation. The program serves to greatly simplify and accelerate the fin design process and should be an invaluable tool to electronic component designers, especially those with a limited background in heat transfer and fin optimization theory.
Leung, C. W. "The optimisation of the design of extended surface heat exchangers." Thesis, University of Sunderland, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234917.
Повний текст джерелаUllsten, Sara. "Tailormade Surfaces for Extended CE Applications." Doctoral thesis, Uppsala University, Department of Chemistry, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4217.
Повний текст джерелаThe combination of capillary electrophoresis (CE) and mass spectrometry (MS) constitutes a powerful microanalytical system in the fields of biology, medicine and chemistry. This thesis describes the development of three novel capillary coatings and demonstrates how these extend the utility of CE as a high-efficiency separation technique in protein analysis and biopharmaceutical drug screening.
Due to the rapidly growing interest in characterizing the human proteome, there is an increased need for rapid protein separations. The use of CE in protein analysis is, however, nontrivial due to problems with protein adsorption to the fused-silica capillary walls. In this thesis, this problem was addressed by developing two novel, physically adsorbed, cationic polymer surface coatings, denoted PolyE-323 and Q-agarose. By using simple rinsing protocols, highly reproducible coatings, stable over a wide range of pH 2-11 were generated. Successful protein separations using cationic-coated capillaries in CE-MS, equipped with either electrospray ionization (ESI) or matrix-assisted laser desorption/ionization (MALDI), has been demonstrated.
In the pharmaceutical industry, favorable pharmacokinetic properties of a candidate drug, such as high bioavailability after oral administration, are crucial for a high success rate in clinical development. Tools for prediction of biopharmaceutically relevant drug properties are important in order to identify and discard poor candidate drugs as soon as possible. In this thesis, a membrane mimetic coating was developed by electrostatically immobilizing liposomes to the capillary wall, via an anchoring sublayer of Q-agarose. The liposome-coated capillaries were demonstrated in on-line CE-MS for prediction of drug membrane permeability.
Fournier, Florian. "FREEFORM REFLECTOR DESIGN WITH EXTENDED SOURCES." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3146.
Повний текст джерелаPh.D.
Optics and Photonics
Optics and Photonics
Optics PhD
Yee, Hoshin Hocking. "Semiconductor quantum-well extended cavity lasers and deep-surface gratings for distributed surface Bragg reflector lasers." Thesis, University of Glasgow, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309492.
Повний текст джерелаHolmes, Daniel John. "Surface structure determination by surface extended X-ray absorption fine structure and low energy electron diffraction." Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235773.
Повний текст джерелаWerenskjold, G. Karl. "An exploratory analysis of corrective maintenance during extended surface ship deployments." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA356567.
Повний текст джерела"September 1998." Thesis advisor(s): Donald P. Gaver. Includes bibliographical references (p. 105). Also Available online.
Cha'o-Kuang, C. "The conjugated convection-conduction analysis of heat transfer in a vertical fin." Thesis, University of Liverpool, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377119.
Повний текст джерелаHolland, Ben. "Flow boiling of FC-72 from a screen laminate extended surface matrix." abstract and full text PDF (free order & download UNR users only), 2006. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1438912.
Повний текст джерелаRehman, Mohammad Munib. "Infinite surface : An extended reflection on the estrangement of the modern subject." Thesis, KTH, Urbana och regionala studier, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-287277.
Повний текст джерелаTILLOTSON, JOHN KING. "DEVELOPMENT AND EVALUATION OF EXTENDED-RELEASE BUMETANIDE TABLETS." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1085067185.
Повний текст джерелаXia, Zhenbo. "Surface Forces in Thin Liquid Films of H-Bonding Liquids Confined between Hydrophobic Surfaces." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/64255.
Повний текст джерелаPh. D.
Lamble, G. M. "Surface extended X-ray absorption fine structure studies of chlorine and caesium adsorbed on silver single crystal surfaces." Thesis, University of Liverpool, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380102.
Повний текст джерелаCendes, Yvette N. "An Extended Study on the Effects of Incorrect Coordinates on Surface Detector Timing." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1310742128.
Повний текст джерелаWang, Weiqi. "Towards real-time tissue surface tracking with a surface-based extended kalman filter for robotic-assisted minimally invasive surgery." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/46992.
Повний текст джерелаRiggins, Jamie N. "Location Estimation of Obstacles for an Autonomous Surface Vehicle." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/33227.
Повний текст джерелаMaster of Science
Bergholz, Katharina. "An extended bounding surface model for the application to general stress paths in sand." Institut für Geotechnik, 2019. https://tud.qucosa.de/id/qucosa%3A72600.
Повний текст джерелаDie Prognose von Setzungen für die Bemessung von Infrastrukturbauwerken stellt hohe Anforderungen an die numerische Untersuchung des Baugrunds und das damit verbundene Stoffgesetz: komplexe Herstellungsprozesse und zyklisch wiederkehrende Verkehrslasten stellen beachtliche Herausforderungen dar. Während das Hauptaugenmerk zumeist auf der realitätsnahen Abbildung des Bodenverhaltens liegt und damit die analytischen Anforderungen des geotechnischen Problems im Fokus stehen, sollten die Bedürfnisse der Ingenieurspraxis in der Stoffgesetzmodellierung nicht außer Acht gelassen werden. In diesem Sinne wurde im Rahmen der Elastoplastizität ein neues Materialmodell für nichtbindige Böden entwickelt. Auf dem Konzept der Bounding Surface Plastizität nach Manzari und Dafalias (1997) beruhend, sind Eigenschaften wie Festigkeit, Steifigkeit und Dilatanz Funktion des Abstands zwischen aktuellem Spannungszustand und einer zugeordneten Modellfläche im Spannungsraum. Auf diese Weise bildet das Mehrflächenmodell fundamentale Verhaltensmuster von Boden korrekt ab, einschließlich beispielsweise scherbezogener Phänomene wie Ver- und Entfestigung, Kontraktanz und Dilatanz oder das Erreichen des kritischen Zustands (Scherfestigkeit bei konstantem Volumen). Des Weiteren erfasst das Modell die Zustandsabhängigkeit des Bodenverhaltens (Barotropie und Pyknotropie). So kann mit nur einem Parametersatz das mechanische Verhalten einer großen Spannweite unterschiedlicher Anfangszustände hinsichtlich Spannung und Lagerungsdichte simuliert werden. Der kinematische Verfestigungsmechanismus der konusförmigen Fließfläche trägt bei Ent- und Wiederbelastungen zu einer realistischeren Steifigkeitsentwicklung bei und ist damit von essenzieller Bedeutung für die Akkumulation von Spannungen oder Verformungen infolge von Lastwechseln. Da sich der gewählte konstitutive Rahmen für Weiterentwicklungen eignet, wurde die ursprüngliche Formulierung des Stoffgesetzes erweitert, um das Modell an die definierten Anforderungen anzupassen. Um geotechnisch relevante Spannungspfade niedriger und höherer Komplexität adäquat reproduzieren zu können, wurde zunächst eine kappenförmige Fließfläche ergänzt. So können irreversible Verformungen nicht nur bei Scherung, sondern auch bei Belastungen ohne Änderung des Spannungsverhältnisses, wie z. B. bei isotroper oder ödometrischer Kompression, auftreten. Bei Spannungspfaden ungewöhnlicher Orientierung, bei Lastwechseln oder zusammengesetzten Spannungspfaden mit Änderung der Belastungsrichtung hat sich eine erhöhte Steifigkeit bei kleinen Dehnungen mit anschließendem dehnungsabhängigen Abfall als nützlich erwiesen. Darüber hinaus berücksichtigt ein zusätzlicher Mechanismus die rückläufige Akkumulation von Spannung oder Verformung mit zunehmender Zyklenanzahl (mittels dissipierter Energie). Im Hinblick auf die Eignung des Stoffgesetzes für die Praxis ist das Modell modular aufgebaut. So kann die Komplexität des Modells (und damit die Anzahl der Parameter) durch Ein- und Ausschalten bestimmter Erweiterungen an die Komplexität des geotechnischen Problems angepasst werden. Die Mehrzahl der Modellparameter wird mit Hilfe konventioneller Laborversuche bestimmt. Eine interne Routine erleichtert durch die Kalibrierung bestimmter Bounding Surface bezogener Größen anhand eines alternativen, stärker an Versuchsergebnissen orientierten User-Inputs bei Bedarf die Parameterwahl. Da die Kenntnis eines Stoffgesetzes entscheidend ist für dessen vernünftigen und verantwortungsvollen Einsatz, soll die vorliegende Arbeit eine fundierte und umfassende Dokumentation bieten. Der erste Teil vermittelt daher zunächst einen Überblick über das zugrunde liegende Bounding Surface Konzept und beschreibt die Neuerungen auf konstitutiver Ebene mit Bezug auf theoretische Hintergründe. Er wird gefolgt von einer detaillierten Darlegung von Potenzialen und Einschränkungen für die Nutzung des erweiterten Modells. Der nächste Abschnitt widmet sich der numerischen Implementierung des Stoffgesetzes und seiner Kalibrierung auf Basis von Versuchsergebnissen. Des Weiteren wird die Kalibrierungsroutine einschließlich des verwendeten Optimierungsalgorithmus präsentiert. Der nachfolgende Teil dient der Modellvalidierung: durch die Simulation von Elementversuchen, die Erzeugung von Antwortellipsen sowie die Abbildung allgemeinerer (beispielsweise zusammengesetzter) Spannungspfade wird die Leistungsfähigkeit des erweiterten Bounding Surface Modells demonstriert. Abschließend werden Schlussfolgerungen gezogen und potenzielle Perspektiven aufgezeigt.:1 Introduction 1.1 General aspects on constitutive modelling 1.2 Motivation and outline of the thesis 1.3 Basic assumptions and terminology 2 Literature review 2.1 From elastoplasticity to bounding surface plasticity 2.1.1 Bounding surface model according to Manzari and Dafalias (1997) 2.2 Further development of the original model 2.2.1 Papadimitriou and Bouckovalas (2002) 2.2.2 Taiebat and Dafalias (2008) 2.3 Small strain stiffness 2.3.1 Observations 2.3.2 Micromechanical considerations 2.3.3 Very small strain shear modulus G0 2.3.4 Constitutive modelling approaches 2.4 Dilatancy 3 The extended bounding surface model 3.1 Fundamental capabilities of the bounding surface concept 3.1.1 Elastic region 3.1.2 Critical state 3.1.3 Shear strength 3.1.4 Shear stiffness (monotonic) 3.1.5 Contractancy and dilatancy 3.1.6 Barotropy and pycnotropy 3.1.7 Compressive stiffness 3.1.8 Shear stiffness in reversed loading 3.1.9 Additional features 3.2 New features of the extended bounding surface model 3.2.1 Minor modifications 3.2.2 Dilatancy formulation 3.2.3 Cap yield surface 3.2.4 Small strain stiffness mechanism 3.2.5 Cyclic loading mechanism 3.2.6 Summary 3.3 Limitations of the bounding surface model 3.3.1 Intrinsic insuffciencies of the bounding surface concept 3.3.2 Remaining shortcomings of the advanced model version 3.3.3 Newly introduced deficiencies 4 The numerical model and its calibration procedure 4.1 Octave implementation of an element test programme 4.2 Calibration procedure 4.2.1 Sands for calibration 4.2.2 Calibration of basic parameters 4.2.3 Calibration of extended model parameters 4.3 User friendly calibration routine 4.3.1 Conceptual background 4.3.2 Optimisation algorithm 5 Performance of the extended bounding surface model 5.1 Model performance in element tests 5.1.1 Monotonic drained triaxial compression test 5.1.2 Monotonic undrained triaxial compression test 5.1.3 Monotonic eta-constant tests 5.2 Model performance in non-standard triaxial testing 5.2.1 Concept of response envelopes 5.2.2 Simulation of response envelopes 5.3 Model performance on general stress paths 5.3.1 Triaxial compression at small strains 5.3.2 Cyclic triaxial loading 6 Conclusions and perspectives 6.1 Conclusions 6.2 Future perspectives Bibliography Appendices A Mathematical background A.1 Fundamental equations of elastoplasticity A.2 Compilation of major constitutive equations (multiaxial formulation) A.3 Elastoplastic stiffness matrix for singular yield surfaces A.4 Coefficient matrices S and E for loading constraints A.5 Derivation of Mcap and Hcap A.6 Intergranular strain adjustment A.7 Intergranular strain correlation B Details on particle swarm optimisation C Compilation of simulation results C.1 Monotonic triaxial loading C.1.1 Toyoura sand C.1.2 Sacramento River sand C.1.3 Hostun sand C.2 Monotonic eta-constant loading C.2.1 Sacramento River sand C.2.2 Hostun sand C.3 Cyclic triaxial loading
Hamed, Ehab Ahmed Mamdouh. "Application and Evaluation of Extended Release Technology to Loop Diuretics." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1037205224.
Повний текст джерелаGao, Xingyu, Shi Chen, Tao Liu, Wei Chen, A. T. S. Wee, T. Nomoto, S. Yagi, Kazuo Soda, and Junji Yuhara. "Si clusters on reconstructed SiC (0001) revealed by surface extended x-ray absorption fine structure." American Institute of Physics, 2009. http://hdl.handle.net/2237/14156.
Повний текст джерелаNishime, Thalita Mayumi Castaldelli. "Development and characterization of extended and flexible plasma jets /." Guaratinguetá, 2019. http://hdl.handle.net/11449/190654.
Повний текст джерелаResumo: Nos últimos anos, tem intensificado o emprego de plasmas em pressão atmosférica para diferentes aplicações. Com o desenvolvimento dos jatos de plasma em pressão atmosférica, alguns tratamentos precisos, como no campo biomédico ou em específicos processamentos de superfícies, tornaram-se mais frequentes. No entanto, a aplicação de plasma à objetos irregulares, dentro de tubos ou mesmo dentro de órgãos ocos é limitada quando se utilizam configurações convencionais de jatos de plasma. Portanto, essas limitações podem ser superadas com o desenvolvimento de jatos de plasma alongados ou gerados remotamente. Neste trabalho, duas configurações de jato de plasma longo visando diferentes campos de aplicação foram aperfeiçoadas e caracterizadas. Inicialmente foi desenvolvido um jato de plasma endoscópico (plasma endoscope) operando em configuração de descarga por barreira dielétrica (DBD) com dimensões milimétricas, versátil ao acoplamento em endoscópios típicos. Este jato de plasma pode operar com hélio ou neônio e conta com um canal externo e concêntrico de gás que permite a introdução de uma cortina de gás eletronegativo ao redor da pluma de plasma. A cortina de proteção a gás preserva a forma do jato de plasma quando operado dentro de cavidades fechadas. As dificuldades advindas do desenvolvimento deste foram investigadas quando diferentes gases foram testados como cortina de proteção dele, dentre estes, o dióxido de carbono se mostrou uma boa opção evitando a formação de descargas ... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The use of atmospheric pressure plasmas for different purposes has increased in recent years. With the development of atmospheric pressure plasma jets, some precise treatments such as in the biomedical field or specific surface processing became more often. However, the delivery of plasma to irregular shaped objects, inside tubes or even hollow organs is limited with the use of conventional plasma jet configurations. Therefore, those limitations can be surpassed with the development of elongated or remotely generated plasma jets. In this work, two extended plasma jet configurations aiming at different application fields were further developed and characterized. Firstly, an endoscopic plasma jet (plasma endoscope) operating with a dielectric barrier discharge (DBD) configuration in millimeter dimensions that can be coupled to a typical endoscope was developed. This plasma jet can operate with helium or neon and counts with an external concentric shielding gas channel that provides the introduction of an electronegative gas curtain around the plasma plume. The shielding gas allows the preservation of the plasma jet shape when operated inside closed cavities. The construction difficulties arisen from the use of different feed and shielding gases were explored. Carbon dioxide was proven to be a good option for the curtain gas around the plasma plume avoiding the formation of parasitic discharges inside the shielding gas tube and the endoscopic housing. When operated with neon, th... (Complete abstract click electronic access below)
Doutor
Li, Diya. "Simultaneous Three-Dimensional Mapping and Geolocation of Road Surface." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/85470.
Повний текст джерелаMaster of Science
This thesis paper presents a simultaneous three dimensional (3D) mapping and geolocation of road surface technique that combines local road surface mapping and global camera localization. The local road surface is reconstructed by image processing technique with optimization. And the designed system globally reconstructs 3D road surface by estimating the global camera poses using the proposed Adaptive Extended Kalman Filter (AEKF)-based method and integrates with local road surface reconstructing technique. The camera pose uses image shift as prior, and is corrected with the sparse low-accuracy Global Positioning System (GPS) data and digital elevation map (DEM). The final 3D road surface map with geolocation is generated by combining both local road surface mapping and global localization results. The proposed technique is tested in both simulation and field experiment, and compared with similar previous work. The results show that the proposed technique achieves better accuracy than conventional Extended Kalman Filter (EKF) method and achieves smaller translation error than other similar other works.
Gómez, Jesús Emilio. "Development of an extended hyperbolic model for concrete-to-soil interfaces." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/28375.
Повний текст джерелаPh. D.
STEEL, Jared Gary. "Investigation into the Dosimetric Effects of Abutting Multi-Leaf-Collimated Photon Fields with Extended Source-to-Surface Electron Fields." Thesis, University of Canterbury. Physics and Astronomy, 2007. http://hdl.handle.net/10092/1423.
Повний текст джерелаGiridhar, Nandipati. "Kinetic Monte Carlo simulations of submonolayer and multilayer epitaxial growth over extended time- and length-scales." University of Toledo / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1248923011.
Повний текст джерелаYe, Maosheng. "Road Surface Condition Detection and Identification and Vehicle Anti-Skid Control." Cleveland State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=csu1227197539.
Повний текст джерелаBertolino, Mattias. "Extended analysis of a pseudo-spectral approach to the vortex patch problem." Thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-354422.
Повний текст джерелаBrowe, Bryan Everett. "Wave Scattering from Structures that Display Areas of Small Radii of Curvature in the Presence of an Extended Planar Surface." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/9746.
Повний текст джерелаMaster of Science
Li, Zuoli. "Studies of Thin Liquid Films Confined between Hydrophobic Surfaces." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/49557.
Повний текст джерелаIt is believed that the water molecules in the thin liquid films (TLFs) of water form clusters as a means to reduce their free energy when they cannot form H-bonds to neighboring hydrophobic surfaces. Dissolved gas molecules should enhance the stability of structured cluster due to the van der Waals force between the entrapped gas molecules and the surrounding water molecules1, which may enhance the strength of the hydrophobic force. Weaker long-range attractive forces detected in degassed water than in air-equilibrated water was found in the present work by means of AFM force measurements, supporting the effect of dissolved gas on the structuring of water. At last, temperature effects on hydrophobic interactions measured in ethanol and the thermodynamic analysis revealed similar results as those found in water, indicating that the hydrophobic force originates from H-bond propagated structuring in the mediums. •
Ph. D.
Tombari, Francesca. "Deformation of surfaces in 2D persistent homology." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15809/.
Повний текст джерелаBergholz, Katharina [Verfasser], Ivo [Akademischer Betreuer] Herle, Thomas [Gutachter] Benz, and Wolffersdorff Peter-Andreas [Gutachter] von. "An extended bounding surface model for the application to general stress paths in sand / Katharina Bergholz ; Gutachter: Thomas Benz, Peter-Andreas von Wolffersdorff ; Betreuer: Ivo Herle." Dresden : Institut für Geotechnik, 2020. http://d-nb.info/1227202490/34.
Повний текст джерелаTempera, Fernando. "Benthic habitats of the extended Faial Island shelf and their relationship to geologic, oceanographic and infralittoral biologic features." Thesis, University of St Andrews, 2009. http://hdl.handle.net/10023/726.
Повний текст джерелаElsner, Joachim. "Surfaces and extended defects in Wurtzite GaN." [S.l. : s.n.], 1998. http://deposit.ddb.de/cgi-bin/dokserv?idn=961023716.
Повний текст джерелаGademer, Antoine. "Réalité terrain étendue : une nouvelle approche pour l'extraction de paramètres de surface biophysiques et géophysiques à l'échelle des individus." Phd thesis, Université Paris-Est, 2010. http://tel.archives-ouvertes.fr/tel-00583243.
Повний текст джерелаCoursey, Johnathan Stuart. "Enhancement of spray cooling heat transfer using extended surfaces and nanofluids." College Park, Md.: University of Maryland, 2007. http://hdl.handle.net/1903/7635.
Повний текст джерелаThesis research directed by: Dept. of Mechanical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Hussien, Elkhorbatly Bashar. "Modélisation, justification et analyse mathématique de modèles en océanographie." Thesis, Tours, 2019. http://www.theses.fr/2019TOUR4009.
Повний текст джерелаThis thesis is devoted to the mathematical study of the water-waves problem concerning two- dimensional motion of an irrotational and incompressible inviscid liquid with a free surface acted only by gravity and surface tension in a highly nonlinear regime. The thesis is separated into two parts of equal importance. In the first part, we justify mathematically more accurate approximation models for the water wave problem that are commonly used in coastal oceanography to describe the propagation of large amplitude surface waves. A new two-dimensional asymptotic shallow-water extended Green-Naghdi system is derived which incorporates the arbitrary higher-order dispersive terms while preserving the full nonlinearity. A well-posedness result and a stability property is then ensured for the one-dimensional case when the bottom is flat and not flat taking into consid- eration a small e
Pierre, André Albert Bernard. "Etude des mécanismes de vieillissement des interfaces de batteries Lithium-ion appliquées aux énergies renouvelables." Thesis, Pau, 2015. http://www.theses.fr/2015PAUU3001/document.
Повний текст джерелаDevelopment of renewable energy sources such as photovoltaic or wind energy is limited by the intermittent nature of these energy sources. This intermittent nature results in the mismatch between production and consumption peaks. As a result, the storage of electrical energy plays an essential role to manage this mismatch. To this aim, lithium-ion technology appears as a good candidate among other ways of electrochemical storage of energy. However the targeted applications require much greater life span than those commonly admitted for portable electronics or electric vehicles. Battery performances, e.g. rechargeable capacity, should be preserved over 15 or 20 years. This PhD thesis aims at studying the long-term aging mechanisms of Li-ion batteries made up of lamellar oxides Li(NixMnyCo1 x y)O2 at the positive electrode and graphite at the negative electrode. We focused on the electrode/electrolyte interfaces which are the major place of aging processes. The work has been performed by X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS), two complementary techniques especially adapted to the study of interfaces, the former giving access to the chemical environments of atoms at the surface, the latter giving the answer of a system to a sinusoidal electric current with various frequencies. An important technical constraint was the difference between the targeted life span for the application (20 years) and the duration of the thesis (3 years). In order to simulate long-term aging the batteries were submitted to electrochemical stress in much harder conditions than in normal use. XPS and EIS characterizations were constantly related to evolution of electrochemical performances of batteries. This study allowed us during the duration of the project to bring improvements to batteries in order to obtain a better response to aging mechanisms regarding retention of electrochemical performances: e.g. change of electrodes or electrolyte formulation, change of active materials composition, etc
Schwarzer, Norbert. "The extended Hertzian Appraoch for lateral loading." Universitätsbibliothek Chemnitz, 2006. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200600150.
Повний текст джерелаTaylor, Susan M. "Oxygen reduction reaction on carbon supported dispersed platinum nanoparticles and extended platinum surfaces." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/16846.
Повний текст джерелаCyrus, Crystal Dawn. "Synthesis and Formulation of Novel Polymers for the Design of Extended Wear Contact Lens Materials and Surfaces." University of Akron / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=akron1239637443.
Повний текст джерелаMoretti, Simone <1978>. "Constructal theory application to a CFD analysis of heat removal enhancement from extended surfaces for industrial processes." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1438/.
Повний текст джерелаFeghali, Fadi Jean. "Potential of surface coatings to extend the service life of concrete structures." Thesis, Heriot-Watt University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.547677.
Повний текст джерелаWang, Yanbin. "Molecular Modeling Study of Oxidative Degradation of Polyperfluoroethers Catalyzed by Iron Fluoride Surfaces : An Extended Hückel Theory Approach." Thesis, University of North Texas, 1995. https://digital.library.unt.edu/ark:/67531/metadc278315/.
Повний текст джерелаShawulienu, Kezilebieke. "Scanning tunneling microscopy and spectroscopy of metal organic complexes : from single atoms to extended networks." Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAE005/document.
Повний текст джерелаIn the bottom up approach of today’s nanoscience, the supramolecular assembly of metal atoms and molecules on surfaces is leading to functional compounds, relevant to many applications in optoelectronics, magnetism, and catalysis. It has been found that in some cases high magnetic spin states and strong magnetic anisotropy appear as a result of electron transfer between ligands, surface and metal atom. The focus of this thesis lies on the self assembling of 1,2,4,5-Tetracyanobenzene (TCNB) and Fe-TCNB coordination nanostructures on the Au(111) surface. The structural formation is directed by the non covalent interactions. Scanning tunneling spectroscopy (STS) reveal that the TCNB molecules are physisorbed on Au(111) surface. By detail analysis of the dI/dV spectra above the TCNB monolayer on the Au(111) surface, we found that the TCNB molecules on Au(111) shows a negligible charge transfer with Au(111) substrate and a small adsorption energy of 0.5 eV per TCNB molecules. STS measurement provide a HOMO-LUMO gap of 3 eV in agreement with DFT calculations. By controlling the fabrication parameters, surface coordination nanostructures with different chemical composition or molecular packing have been synthesized. The electronic properties have been characterized by the local dI/dV analysis of the metal centers at different steps of a Fe-(TCNB)x (x=4, 2) complexes formation. At low temperature deposition, first form an ordered metastable intermediate. STM data yield the bond angle between the Fe-N-C is 120°. The scanning tunneling spectroscopy reveal that Fe atoms and the TCNB molecules keep their identity while the Fe atoms localize the surface-state electrons similar to what they do on the bare Au(111) surface. This result indicates that the TCNB molecules are virtually in the same electronic state as before the Fe adsorption. The situations are different when the deposition performance at room temperature. When the temperature is changed, to room temperature, the original entities transform into the Fe(TCNB)4 monomer complexes with 180° Fe-N-C bond angles. The STS above the Fe(TCNB)4 complex strongly suggest that the coordination bond had been formed between the Fe atom and the TCNB ligands. DFT calculations support the conclusions and drawn from experimental studies and assist the interpretations of experiment. Further structural complexation is achieved by the synthesis of Fe(TCNB)2 network. The network has a square structure with a regular separation of the magnetic Fe atoms in the network. The electronic information is gathered from the spectroscopic labeling of FePc to identify some of the resonances of the Fe(TCNB)2 network. There are similar features are found in the dI/dV spectra above the Fe atoms and ligand in both system, indicating that the Fe somehow feels a similar environment from the TCNB ligands in the network and in the FePc molecules. Further analysis of this feature have been disused by means of metal-ligand bond formation
Roberts, Zoe J. "Design and application of novel biodegradable chain extenders and surface-tuneable hyperbranched chain terminating agents in thermoplastic polyurethane elastomers." Thesis, University of Warwick, 2017. http://wrap.warwick.ac.uk/107841/.
Повний текст джерелаDunn, Ashley L. "Jackknife stability of articulated tractor semitrailer vehicles with high-output brakes and jackknife detection on low coefficient surfaces." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1061328963.
Повний текст джерелаMadhavan, Srivatsan. "Review, Design and Computational Study of Some Compact Heat Exchangers." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1511885027497222.
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