Дисертації з теми "Circular domain"
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Abouelleil, Alaaeldin. "Interaction domain in non-prestressed circular concrete bridge piers using simplified modified compression field theory." Thesis, Kansas State University, 2015. http://hdl.handle.net/2097/18996.
Повний текст джерелаDepartment of Civil Engineering
Hayder Rasheed
The importance of the analysis of circular columns to accurately predict their ultimate confined capacity under shear-flexure-axial force interaction domain is recognized in light of the extreme load event imposed by the current AASHTO LRFD specification. In this study, various procedures for computing the shear strength are reviewed. Then, the current procedure adopted by AASHTO LRFD 2014, based on the simplified modified compression field theory, is evaluated for non-presetressed circular concrete bridge piers. This evaluation is benchmarked against experimental data available in the literature and against Response 2000 freeware program that depicts interaction diagrams based on AASHTO 1999 requirements. Differences in results are discussed and future improvements are proposed. A new approach is presented to improve the accuracy of AASHTO LRFD calculations. The main parameters that control the cross section shear strength are discussed based on the experimental results and comparisons.
Chhikara, Ishwar S. "Effect of ligand binding on the backbone dynamics of linear and circular constructs of SH3 Domain." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/2140.
Повний текст джерелаThesis research directed by: Dept. of Chemistry and Biochemistry. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
MOURA, Marcel Nascimento de. "Vortex motion around a circular cylinder both in an unbounded domain and near a plane boundary." Universidade Federal de Pernambuco, 2012. https://repositorio.ufpe.br/handle/123456789/20014.
Повний текст джерелаMade available in DSpace on 2017-07-25T13:43:57Z (GMT). No. of bitstreams: 1 2012-Dissertacao-MarcelMoura.pdf: 3817034 bytes, checksum: 446ebbbcdd39fd7bf5fb4220a97e8b0d (MD5) Previous issue date: 2012-05-17
Nessa disserta ̧c ̃ao estudamos a dinˆamica de v ́ortices pr ́oximos a fronteiras s ́olidas emum fluido ideal, atrav ́es do modelo de v ́ortices puntiformes. Obtivemos as configura ̧c ̃oesestacion ́arias de v ́ortices na presen ̧ca de um cilindro circular colocado em um escoamentouniforme e investigamos suas propriedades de estabilidadesob pequenas perturba ̧c ̃oes.Dois sistemas distintos foram estudados. Consideramos inicialmente o caso cl ́assico deum cilindro circular colocado em um escoamento uniforme ilimitado. Nesse caso, comose sabe, um par de v ́ortices com sentidos opostos ́e observado na esteira do cilindro, paran ́umeros de Reynolds at ́e cerca de 50, ao passo que para n ́umeros de Reynolds maiores,essa configura ̧c ̃ao torna-se inst ́avel dando lugar `a emiss ̃ao alternada de v ́ortices. Estesistema foi tratado analiticamente pela primeira vez, atrav ́es de um modelo de v ́orticespuntiformes, por F ̈oppl em 1913. Na primeira parte dessa disserta ̧c ̃ao, o modelo deF ̈oppl ́e revisto e v ́arias caracter ́ısticas novas desse sistema s ̃ao apresentadas, incluindoa existˆencia de um ponto de sela nilpotente no infinito, at ́eent ̃ao n ̃ao percebido, cujas ́orbitas homocl ́ınicas definem a regi ̃ao de estabilidade n ̃ao-linear do chamado equil ́ıbrio deF ̈oppl. Al ́em disso, estudamos tamb ́em a dinˆamica n ̃ao-linear resultante de perturba ̧c ̃oesanti-sim ́etricas do equil ́ıbrio de F ̈oppl e discutimos suarelevˆancia para a emiss ̃ao alternadade v ́ortices. Na segunda parte, consideramos o movimento de um v ́ortice em torno deum cilindro circular colocado acima de uma parede plana infinita. Em experimentos comesse arranjo, um v ́ortice estacion ́ario ́e observado na frente do cilindro, uma situa ̧c ̃ao quen ̃ao ́e encontrada no caso cl ́assico (i.e., sem o plano). Para estudar a dinˆamica de v ́orticesnessa situa ̧c ̃ao, a regi ̃ao do fluido ́e inicialmente mapeada em um anel em um planocomplexo auxiliar, e o potencial complexo correspondente ́e ent ̃ao obtido em termos dachamada fun ̧c ̃ao prima de Schottky-Klein, que neste caso pode ser escrita em termos defun ̧c ̃oes el ́ıpticas. As configura ̧c ̃oes estacion ́arias s ̃ao ent ̃ao calculadas e suas propriedadesde estabilidade s ̃ao determinadas. Discutimos tamb ́em, como as solu ̧c ̃oes do modelo dev ́ortice puntiforme podem ajudar a explicar as observa ̧c ̃oes experimentais envolvendo aforma ̧c ̃ao de v ́ortices na frente de um cilindro colocado pr ́oximo a um plano.
In this thesis the dynamics of vortices near solid boundaries in an ideal fluid is studiedusing the point vortex model. Stationary configurations of vortices in the presence of acircular cylinder placed in a uniform stream are obtained and their stability propertiesunder small disturbances are investigated. Two different systems are studied. First, theclassical case of a circular cylinder placed in a uniform stream in an otherwise unboundeddomain is considered. As is well known, in this case a pair of counter-rotating eddies isobserved downstream of the cylinder for Reynolds numbers upto about 50, whereas forlarger Reynolds number this configuration becomes unstable, leading to vortex shedding.This system was first treated analytically using point vortices by F ̈oppl in 1913. In thefirst part of the thesis, the F ̈oppl model is revisited and several novel features of this sys-tem are presented, including the existence of a hitherto unnoticed nilpotent saddle pointat infinity whose homoclinic orbits define the region of nonlinear stability of the so-calledF ̈oppl equilibrium. In addition, the nonlinear dynamics resulting from antisymmetricperturbations of the F ̈oppl equilibrium is studied and its relevance to vortex sheddingis discussed. In the second part, the motion of a vortex around a cylinder placed abovean infinite plane wall is considered. In experiments using this arrangement, a stationaryeddy is observed in front of the cylinder, a situation that isnot found in the classical case(i.e., without the plane). To study the vortex dynamics in this case, the flow domain isfirst mapped to an annulus in an auxiliary complex plane and the corresponding complexpotential is obtained in terms of the so-called Schottky-Klein prime function, which inthis case can be written in terms of elliptic functions. The stationary configurations arethen calculated and their stability properties are determined. It is also discussed how thesolutions of the point vortex model can help to explain the experimental findings for thevortex formation in front of a cylinder placed near a plane.
Sjöstrand, Linda. "Method Development for Thermal Stability Analysis by Circular Dichroism : Application to the Abp1p SH3 domain from yeast." Thesis, Linköpings universitet, Kemi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-148286.
Повний текст джерелаNguyen, Tuong-Vi T. "Investigating the properties of the ZIP4 M3M4 domain in the presence and absence of zinc." Digital WPI, 2011. https://digitalcommons.wpi.edu/etd-theses/442.
Повний текст джерелаMatthews, Sam S. "Investigation into the Effects of PEGylation on the Thermodynamic Stability of the WW Domain." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/4280.
Повний текст джерелаJasper, Evan. "Development of Techniques in Time Domain Terahertz Spectroscopy for the Study of Chiral and Topological Materials." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1597048083501651.
Повний текст джерелаKarlsson, Anette. "In-Plane Motion Correction in Reconstruction of non-Cartesian 3D-functional MRI." Thesis, Linköpings universitet, Datorseende, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-72056.
Повний текст джерелаNär patienter rör sig under en MRI-undersökning uppstår artefakter i den rekonstruerande bilden och därför är det önskvärt med rörelsekorrigering. En 2D- rörelsekorrigeringsalgoritm som är anpassad för PRESTO-CAN har tagits fram. PRESTO-CAN är en ny fMRI-metod för 3D där samplingen av k-rummet är radiell i (kx,kz)-planet och kartesisk i ky-riktningen. Rotations- och translationsrörelser kan estimeras separat då magnituden av signalen bara påverkas av rotationsrörelser. Eftersom data är samplat radiellt kan rotationen estimeras genom att hitta translationen i vinkelled med hjälp av cirkulär korrelation. Korrelation används även för att hitta translationen i i x- och z-riktningen. Test på simulerat data visar att rörelsekorrigeringsalgoritmen både detekterar och korrigerar för rörelser vilket leder till bilder med mycket mindre rörelseartefakter.
Hanazono, Yuya. "Structural studies on the mechanism of protein folding." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188506.
Повний текст джерелаPickford, Rachael Anne. "A study of magnetic properties of hard and soft magnetic materials by Lorentz transmission electron microscopy and magnetic x-ray circular dichroism." Thesis, University of York, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367489.
Повний текст джерелаAl, Khambashi Majid S. "Analysis and solutions for RFID tag and RFID reader deployment in wireless communications applications. Simulation and measurement of linear and circular polarised RFID tag and reader antennas and analysing the tags radiation efficiency when operated close to the human body." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/6340.
Повний текст джерелаAl, Khambashi Majid Salim. "Analysis and solutions for RFID tag and RFID reader deployment in wireless communications applications : simulation and measurement of linear and circular polarised RFID tag and reader antennas and analysing the tag's radiation efficiency when operated close to the human body." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/6340.
Повний текст джерелаSoares, Maria do Céu Cerqueira. "Factorization by invariant embedding of elliptic problems: circular and star-shaped domains." Doctoral thesis, FCT - UNL, 2006. http://hdl.handle.net/10362/2708.
Повний текст джерелаThis thesis concerns the factorization of elliptic operators, namely the decomposition of a second order boundary value problem, de¯ned in an open bounded regular domain, in an uncoupled system of two ¯rst order initial value problems. The method presented here is inspired on the theory of Optimal Control. It is a return, in a new spatial approach, to the technique of the invariant temporal embedding, de¯ned originally in the context of Dynamic Programming, used in Control Theory for the computation of the optimal feedback. This technique consists in embedding the initial problem in a family of similar problems depending on a parameter, which are solved recursively. In our case, each problem is de¯ned over a sub-domain limited by a mobile boundary depending on the parameter. We introduce an operator relating the trace of the function de¯ned for each problem, and the trace of its normal derivative over the mobile boundary. Without loss of generality, we particularize the study to a Poisson's equation with, for example, a Dirichlet's boundary condition. We ¯rst consider a circular domain and we present for it two approaches: ¯rst, we apply an invariant embedding that starts on the boundary of the circle and go towards its center, followed by an invariant embedding in the opposite direction. Next, we generalize the method, applying it to the case of an arbitrary star shaped domain. In all cases, the family of curves which limits the subdomains de¯ned by the invariant embedding are homothetic to one another and homothetic to a point. This fact induces the appearing of a singularity.
Fundação para a Ciência e a Tecnologia (FCT) - Praxis XXI, BD/ 21443/99
Louca, Elena. "A new transform approach to biharmonic boundary value problems in circular domains with applications to Stokes flows." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/55997.
Повний текст джерелаPadonou, Esperan. "Apprentissage Statistique en Domaine Circulaire Pour la Planification de Contrôles en Microélectronique." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEM009/document.
Повний текст джерелаDriven by industrial needs in microelectronics, this thesis is focused on probabilistic models for spatial data and Statistical Process Control. The spatial problem has the specificity of being defined on circular domains. It is addressed through a Kriging model where the deterministic part is made of orthogonal polynomials and the stochastic term represented by a Gaussian process. Defined with the Euclidean distance and the uniform measure over the disk, traditional Kriging models do not exploit knowledge on manufacturing processes. To take rotations or diffusions from the center into account, we introduce polar Gaussian processes over the disk. They embed radial and angular correlations in Kriging predictions, leading to significant improvements in the considered situations. Polar Gaussian processes are then interpreted via Sobol decomposition and generalized in higher dimensions. Different designs of experiments are developed for the proposed models. Among them, Latin cylinders reproduce in the space of polar coordinates the properties of Latin hypercubes. To model spatial and temporal data, Statistical Process Control is addressed by monitoring Kriging parameters, based on standard control charts. Furthermore, the monitored time – series contain outliers and structural changes, which cause bias in prediction and false alarms in risk management. These issues are simultaneously tackled with a robust and adaptive smoothing
Bauer, Ulrich Josef [Verfasser], Stephan [Gutachter] Ruscheweyh, and Wolfgang [Gutachter] Lauf. "Conformal Mappings onto Simply and Multiply Connected Circular Arc Polygon Domains / Ulrich Josef Bauer. Gutachter: Stephan Ruscheweyh ; Wolfgang Lauf." Würzburg : Universität Würzburg, 2016. http://d-nb.info/1111784388/34.
Повний текст джерелаBordel, Catherine. "Etude de la modification par nitruration des propriétés magnétiques des alliages amorphes TbFe et TbFeCo." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10174.
Повний текст джерелаDELOBBE, ANNE. "Developpement d'experiences de dichroisme circulaire magnetique des rayons x dans le domaine des basses temperatures." Paris 11, 1999. http://www.theses.fr/1999PA112298.
Повний текст джерелаDonatini, Fabrice. "Étude de l'anisotropie optique circulaire magneto-induite des ferrofluides dans le domaine spectral visible-proche infrarouge : applications." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0091.
Повний текст джерелаGallopin, Matthieu. "Analyse par RMN et Dichroïsme Circulaire de la dynamique, de la stabilité et du repliement du domaine 1 de l'annexine 1 humaine." Paris 11, 2007. http://www.theses.fr/2007PA112078.
Повний текст джерелаJamet, Ségolène. "Etude des parois de domaines dans les nanofils magnétiques." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAY068/document.
Повний текст джерелаThe work performed during my thesis was based on magnetic domain walls in magnetic nanowires. We extended the phase diagram of domain walls already known to a geometry ranging from nanostrips to nanowires. The various types of domain wall and transition phase types are presented. We introduced new estimators based on physical known features, in order to better characterize domain walls magnetic configurations of domain walls and then to predict the type of domain wall according to the geometry.To validate our theoretical approach, we were interested in imaging these domain walls. We chose the X-ray Magnetic Circular Dichroism along with the PhotoEmission Electron Microscopy (XMCD PEEM). This microscopy method enables to reach spatial resolution required to observed domain wall configuration. The experimental conditions (sample and set up) enable to have access both the surface magnetization and also the shadow of the wire projected on to the substrate. This enable caries information about volume magnetization, averaged along the path of the X-ray through the wire. This experimental configuration gives rise to complex contrasts. Thus, we developped a model that enables to simulate the XMCD contrast from steady state micromagnetic configurations. Comparison between experimental and simulated contrasts gives rise to a good quantitative agreement. Moreover, experimental parameters were studied in order to get the best magnetic contrast, reflecting the true magnetic configuration of the sample.For the future, the work consists in the study of the domain wall propagation in nanowires, particularly the propagation of the Bloch point wall
Moroy, Gautier Alix Alain Jean-Paul. "Etude structurale du domaine d'interaction du récepteur de l'élastine. Approches biochimiques, biophysiques et bioinformatiques /." Reims : S.C.D. de l'Université, 2005. http://scdurca.univ-reims.fr/exl-doc/GED00000238.pdf.
Повний текст джерелаRajaona, Dominique. "Analyse harmonique de phenomenes periodiques, pseudo-periodiques superperiodiques : application a l'etude experimentale des efforts hydrodynamiques appliques sur un cylindre circulaire place dans un ecoulement stationnaire et instationnaire." Nantes, 1987. http://www.theses.fr/1987NANT2040.
Повний текст джерелаMoroy, Gautier. "Etude structurale du domaine d'interaction du récepteur de l'élastine. : Approches biochimiques, biophysiques et bioinformatiques." Reims, 2005. http://theses.univ-reims.fr/exl-doc/GED00000238.pdf.
Повний текст джерелаThis thesis deals with the theoretical and experimental study of the interaction between peptides derived from ExtraCellular Matrix (ECM) proteins and one of the elastin receptor complex sub-units: the Elastin Binding Protein (EBP). In the first part of this work, we characterised the structure of the EBP binding domain, called the Sgal peptide (VVGSPSAQDEASPLS). Experimental results, obtained from Circular Dichroism and NMR spectroscopies, have shown that the Sgal peptide structure presents an equilibrium between a Polyproline II helix structure and an unordered conformation. The molecular dynamic simulations results are in good agreement with those obtained experimentally showing unordered conformations, many of them exhibiting however a type I b-turn spanning the QDEA sequence. On the basis of this turn stability, we proposed that a type I b-turn spanning the QDEA sequence is crucial and necessary for the EBP receptor activity. We then focused on the structural behaviour of EBP peptides. The studied peptides were all containing a GXXPG sequence (X being any residue) and derived from ECM proteins (elastin and fibrillin-1). By molecular dynamics simulations, Monte-Carlo and adiabatic map calculations, we have demonstrated that a type VIII b-turn on the GXXP motif seemed to be their preferential fold. All the peptides, whose biological activity and anchoring to the EBP had already been proved, were presenting this king of folding. In spite of the fact that the inactive peptides could fold transitorily into a type VIII b-turn, they were the only peptides whose conformation was characterised by another b-turn type, mainly type II' or I. Finally, we have demonstrated experimentally that the Sgal peptide was able to bind directly to the VGVAPG peptide with a high affinity (the dissociation constant was equal to 26,7 nM). We have then studied, using molecular docking, the interaction between several Elastin Derived Peptides (EDP) and the Pancreatic Porcine Elastase (PPE), which shows a sequence homology of 46% with the Sgal peptide. The best solution proposed for each EDP were a distorted type VIII b-turn on the GXXP sequence, located around the Q8 residue of the PPE. The EDP-PPE complex was moreover stabilised by 3 H-bonds. We have studied the VGVAPG peptide – Sgal peptide complex stability with the same spatial configuration than in the previous complex: during 20 ns of molecular dynamic simulation, these 2 peptides were in contact and the 3 H-bonds were observable during all the molecular dynamic trajectory. We can then conclude that a type VIII b-turn on GXXP for the EDP and a type I b-turn on QDEA for the elastin binding domain seem to be essential for the interaction between EDP and EBP
Romanens, Fabien. "Dynamique du retournement de l'aimantation dans les systèmes pour l'enregistrement magnétique." Phd thesis, Université Joseph Fourier (Grenoble), 2006. http://tel.archives-ouvertes.fr/tel-00127015.
Повний текст джерелаDIAS, ANNE-MARIE. "Etude par dichroisme circulaire magnetique dans le domaine des rayons x des proprietes magnetiques des systemes fortement correles a base de cerium." Paris 6, 1997. http://www.theses.fr/1997PA066308.
Повний текст джерелаMOREAU, FRANCOISE. "Etude de la serie cellulaire, bidimensionnelle et complexe, et de ses applications aux ecoulements de stokes en canal plan." Poitiers, 1988. http://www.theses.fr/1988POIT2278.
Повний текст джерелаFavre-Marinet, Michel. "Structures cohérentes dans un jet rond excité." Grenoble 1, 1986. http://www.theses.fr/1986GRE10061.
Повний текст джерелаHellou, Mustapha. "Etude numérique et expérimentale de l'écoulement à structure cellulaire engendré par la rotation d'un cylindre dans un canal." Poitiers, 1988. http://www.theses.fr/1988POIT2267.
Повний текст джерелаEleoui, Mustafa. "Couches épitaxiales magnétiques à paramètre cristallin ajustable." Phd thesis, Université Joseph Fourier (Grenoble), 2004. http://tel.archives-ouvertes.fr/tel-00009222.
Повний текст джерелаcinq nanomètres ont pu être élaborées, ce qui contraste avec les résultats de la littérature (un ou deux plans atomiques). Cette épaisseur inhabituellement élevée nous a permis d'obtenir rémanence, coercitivité, et/ou subdivision en domaines
magnétiques stables à température ambiante. Les domaines magnétiques ont été mis en évidence par dichroïsme magnétique circulaire des rayon X. Enfin nous avons développé un modèle micromagnétique analytique du renversement d'aimantation dans une nanostructure ultramince, qui pourra être appliqué à certaines des nouvelles structures élaborées au cours de cette thèse.
Yang, Ming-Li, and 楊名禮. "Application of Boundary-Point-Matching Method to Solving Laplace Problems in a Circular Domain with Multiple Circular Interior Regions." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/25990308954000649769.
Повний текст джерела"Spectral domain analysis of circular microstrip antennas on planar and spherical surfaces." Chinese University of Hong Kong, 1990. http://library.cuhk.edu.hk/record=b5886607.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 1990.
Bibliography: leaves [124]-[127]
ACKNOWLEDGEMENT --- p.i
LIST OF SYMBOLS --- p.ii
Chapter CHAPTER 1 --- INTRODUCTION --- p.1-1
Chapter CHAPTER 2 --- ANALYSIS OF MICROSTRIP ANTENNA ON A PLANAR SURFACE --- p.2-1
Chapter 2.1 --- Dyadic Green's function formulation of a double-patch system --- p.2-3
Chapter 2.1.1 --- Field components --- p.2-4
Chapter 2.1.2 --- Boundary conditions and dyadic Green's function --- p.2-8
Chapter 2.2 --- Microstrip antenna with an airgap --- p.2-14
Chapter 2.3 --- Microstrip antenna with a superstate --- p.2-16
Chapter 2.4 --- Galerkin's method --- p.2-18
Chapter 2.5 --- Numerical computation --- p.2-25
Chapter 2.6 --- Results and discussions --- p.2-30
Chapter CHAPTER 3 --- ANALYSIS OF MICROSTRIP ANTENNA ON SPHERICAL SURFACE --- p.3-1
Chapter 3.1 --- Fields in spherical coordinates --- p.3-3
Chapter 3.1.1 --- solution of scalar Helmholtz equation in spherical coordinates --- p.3-3
Chapter 3.1.2 --- Vector potentials --- p.3-6
Chapter 3.2 --- Cavity model approach --- p.3-10
Chapter 3.2.1 --- Formulation of radiation patterns --- p.3-11
Chapter 3.2.2 --- Results and discussions --- p.3-23
Chapter 3.3 --- Spectral domain approach --- p.3-39
Chapter 3.3.1 --- General formulation --- p.3-39
Chapter 3.3.2 --- Complex resonant frequency --- p.3-48
Chapter 3.3.3 --- Far field radiation pattern --- p.3-51
Chapter 3.3.4 --- Current distribution --- p.3-52
Chapter 3.3.5 --- Limiting case of thin dielectric --- p.3-58
Chapter 3.3.6 --- Results and discussions --- p.3-63
Chapter CHAPTER 4 --- CONCLUSIONS --- p.4-1
REFERENCES
Chapter APPENDIX I --- ASSOCIATED LEGENDRE FUNCTIONS
Chapter APPENDIX II --- SPHERICAL BESSEL FUNCTIONS
Chapter APPENDIX III --- VECTOR LEGENDRE SERIES
Chapter APPENDIX IV --- RESONANT FREQUENCY RELATION FOR THIN DIELECTRIC
Chapter APPENDIX V --- LIST OF PUBLICATIONS THAT ARE PRODUCED BY THE STUDIES
Huang, Ya-Ping, та 黃雅萍. "Purification of RGG domain of topoisomerase III β and circular RNA substrate preparation". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/aytyu6.
Повний текст джерела國立中興大學
生物化學研究所
106
Topoisomerase is involved in regulation of DNA replication, DNA recombination, and transcription. DNA is usually in the form of a double-stranded helix. In DNA replication or transcription, helicase unwinds the helix forming supercoil structure and produces the topological problem, whereas the topoisomerase removes supercoil via the topoisomerase activity. DNA topoisomerases are divided into type I and II: type I topoisomerase cuts one of double-stranded DNA to change topology; type II topoisomerase cuts both strands of the helix to change topology. Topoisomerase IIIβ, a type I enzyme has been found to possess activity of RNA topoisomerase. It has also been reported that RGG domain of topoisomerase IIIβ can bind to RNA. This study investigated whether RGG domain interacts with circular pseudoknot RNA and circular RNA substrates. First, we used in vitro transcription to prepare the RNA and cyclize the RNA by T4 DNA ligase or T4 RNA ligase. Results showed that T4 DNA ligase couldn’t cyclize DU177-str (L) pseudoknot RNA, whereas T4 RNA ligase could generate potential circular RNA product that requires further characterization by RNase R treatment. We also cloned and overexpressed RGG domain as GST fusion protein and purified this protein with Glutathione Sepharose resin by affinity chromatography. Electrophoretic Mobility Shift Assay indicated that RGG domain interacts with DU177-str (L) pseudoknot RNA. We plan to evaluate the effect of pseudoknot RNA on RNA topoisomerase activity of topoisomerase IIIβ in the future. Key word:topoisomerase IIIβ、RGG domain、circular RNA、RNA topoisomerase
Kai-MingLin and 林楷洺. "The Mechanism of Circular Dichroism in Twisted Arch nanostructures analyzed by Finite-difference Time-Domain method." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/z9dm84.
Повний текст джерела國立成功大學
光電科學與工程學系
107
Metamaterials are artificial materials with special geometry design, so that we can create many unique physical properties which do not exist in nature. Due to its size is much smaller than operating wavelength, metamaterials allow the possibility to control electromagnetic wave. Chiral metamaterials are metamaterials with chirality, which means polarizes light of opposite handedness, namely, left-handed and right-handed circularly polarized (LCP and RCP) interact differently with its’ non-mirror symmetry structures. Optical activity stemming from chirality include circular dichroism (CD) which measures the different optical activity of two opposite handedness circularly polarized waves. Twisted arch nanostructures are chiral metamaterials composed by two metal arch with height difference. The coupling between two metal arch and the phase delay caused by height different will trigger circular dichroism. With Finite Difference Time Domain (FDTD) simulations, we can analyze the mechanism of circular dichroism in twisted arch nanostructures. Base on experiment data, we discover that with appropriate design, twisted arch structure can produce enormously strong circular dichroism.
Yao, Cheng-Yi, and 姚承毅. "Application of Boundary-Point-Matching Method to Solving Laplace Problems in an Infinite Domain with Multiple Circular Interior Regions." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/64719709781757456879.
Повний текст джерела國立臺灣海洋大學
河海工程學系
101
For the problems concerning an infinite domain with multiple circular interior regions, lots of researchers had applied various approaches to tackle these topics in the past. The application of the boundary-point-matching method to solve the Laplace’s equation in an infinite domain with interior circular regions for the potential-flow, antiplane elastic and electrostatic fields is the main purpose of this study. Computed results of derived formulations have been verified by those in the literature. Based on the boundary-point-matching method, several circular boundaries are introduced to divide the entire into an outer region and several sub-regions. Using the method of separation of variable, the expression of perturbed potentials for each sub-region satisfying the governing Laplace equation is obtained. Coordinate shifts are performed via the suitable coordinate transformation relations. Distributing a chain of sampling points on the boundaries and employing the boundary conditions or continuity conditions, the simultaneous equations can be constructed and then the unknown expansion coefficients determined. Numerical results presented herein are all in good agreement with those given in the literature. When employing the boundary-point-matching method proposed herein, only the simple Laplace’s general solutions in cylindrical coordinates are utilized. That is to say, the proposed method provides a substitute one for people not familiar with the complicated numerical approaches such as the method of conformal mapping, the boundary-element method and the method of special functions.
Silva, Marta Alexandra Fernandes. "Characterization of novel heme-containing sensor proteins from Geobacter sulfurreducens." Doctoral thesis, 2014. http://hdl.handle.net/10362/14390.
Повний текст джерелаFundação para a Ciência e a Tecnologia (FCT)- Bolsa de Doutoramento SFRH/BD/61952/2009, do Projecto PTDC/BBB-BEP/0753/2012 e ao Projecto Estratégico PEst-C/EQB/LA0006/2013 concedido ao REQUIMTE Laboratório
HUANG, XIAN-JIE, and 黃賢杰. "Application of the finite-difference time-domain method for the solution of the electromagnetic boundary value problem of the circular diffraction antenna and the cylindrical monopole." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/85021720467030919667.
Повний текст джерелаKoushik, S. "Estimation of Stress Concentration and Stress Intensity Factors by a Semi-Analytical Method." Thesis, 2017. http://etd.iisc.ernet.in/2005/3632.
Повний текст джерелаRitter, Tyson. "Acyclic embeddings of open Riemann surfaces into elliptic manifolds." Thesis, 2010. http://hdl.handle.net/2440/69578.
Повний текст джерелаThesis (Ph.D.) -- University of Adelaide, School of Mathematical Sciences, 2010
Bauer, Ulrich Josef. "Conformal Mappings onto Simply and Multiply Connected Circular Arc Polygon Domains." Doctoral thesis, 2015. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-123914.
Повний текст джерелаDas Ziel dieser Arbeit ist die Untersuchung von konformen Abbildungen auf Zirkularpolygongebiete, d.h. Gebiete, die von Polygonen berandet werden, die sich aus Kreisbögen statt Geradenstücken zusammensetzen. Konforme Abbildungen auf Zirkularpolygongebiete enthalten Parameter zusätzlich zu den klassischen Parametern der Schwarz-Christoffel-Transformation. Um zum Parameterproblem der konformen Abbildungen der Einheitskreisscheibe auf Zirkularpolygongebiete beizutragen, werden zwei Spezialfälle dieser Abbildungen untersucht. Im ersten Fall können die zusätzlichen Parameter angeben werden, falls das berandende Zirkularpolygon ein Polygon mit geraden Seiten ist. Im zweiten Fall wird eine Approximation für die zusätzlichen Parameter angegeben, falls das Zirkularpolygongebiet gewisse Symmetriebedingungen erfüllt. Diese Ergebnisse erlauben es Schlüsse zu ziehen in Bezug auf die Verbindung zwischen den zusätzlichen Parametern und den klassischen Parametern der Abbildung. Für Konforme Abbildungen auf mehrfach zusammenhängende Zirkularpolygongebiete wird eine alternative Konstruktion der Abbildungsformel angegeben, welche nicht die "Schottky-Klein prime function" verwendet. Während der Konstruktion des Hauptergebnisses, der Abbildungsformel für Gebiete mit einem Zusammenhang von drei oder mehr, wird auch eine Formel für die konformen Abbildungen auf zweifach zusammenhängende Zirkularpolygongebiete angegeben. Der Vergleich dieser Abbildungsformeln mit bereits bekannten Abbildungen erlaubt es Werte für einige der Parameter der Abbildungen auf zweifach zusammenhängende Zirkularpolygongebiete anzugeben, falls das Bildgebiet ein Polygonalgebiet ist. Die unterschiedlichen Komponenten der Abbildungsformel sind unter Verwendung einer leicht modifizierten Form der Poincaré-Theta-Reihe konstruiert. Diese Konstruktion enthält die Gestaltung einer Funktion um unerwünschte Polstellen zu entfernen und von unterschiedlichen Versionen von Funktionen, die analytisch auf dem Definitionsgebiet der Abbildungsfunktion sind und spezielle Funktionalgleichungen erfüllen. Es werden auch die notwendigen Konzepte angegeben um die konformen Abbildungen auf mehrfach zusammenhängende Zirkularpolygongebiete numerisch auszuwerten. Prozedurbeschreibungen für die Berechnung der Formel für zweifach zusammenhängende Bildgebiete und für den Fall eines Zusammenhangs von drei oder mehr werden angegeben. Da für das Auswerten solcher Abbildungen das Lösen einer Differentialgleichung notwendig ist, werden mögliche Konfigurationen von Kurven im Urbildgebiet angegeben, an denen entlang die Gleichung gelöst werden kann. Es werden weiterhin Prozeduren beschrieben um das Parameterproblem für mehrfach zusammenhängende Zirkularpolygongebiete zu lösen
Lavoie, Guillaume. "Croissance des fonctions propres du laplacien sur un domaine circulaire." Thèse, 2011. http://hdl.handle.net/1866/6851.
Повний текст джерелаThe goal of this master's thesis is to explore the properties of the solutions of the eigenvalue problem for the Laplace operator on a disk as the eigenvalues go to in nity. More speci cally, we study the growth rate of the pointwise and the L1 norms of the eigenfunctions. Let D be the unit disk and @D be its boundary (the unit circle). We study the solutions of the eigenvalue problem f = f with either Dirichlet boundary condition (fj@D = 0) or Neumann boundary condition ( @f @nj@D = 0; note that for the disk the normal derivative is simply the derivative with respect to the radial variable: @ @n = @ @r ). The corresponding eigenfunctions are given by: f (r; ) = fn;m(r; ) = Jn(kn;mr)(Acos(n ) + B sin(n )) (Dirichlet) fN (r; ) = fN n;m(r; ) = Jn(k0 n;mr)(Acos(n ) + B sin(n )) (Neumann) where Jn is the nth order Bessel function of the rst type, kn;m is its mth zero and k0 n;m is the mth zero of its derivative (here we denote the eigenfunctions for the Dirichlet problem by f and those for the Neumann problem by fN). The spectrum of the Laplacian on D, SpD( ), that is the set of its eigenvalues, is given by: SpD( ) = f : f = fg = fk2 n;m : n = 0; 1; 2; : : :m = 1; 2; : : :g (Dirichlet) SpN D( ) = f : fN = fNg = fk0 n;m 2 : n = 0; 1; 2; : : :m = 1; 2; : : :g (Neumann) Finally, we normalize the L2 norm of the eigenfunctions on D, namely: R D F2 da = 1 (here and further on we use the notation F for the normalized eigenfunctions and f for arbitrary eigenfunctions). Under these conditions, we study the growth rate of the L1 norm of the normalized eigenfunctions, jjF jj1, in relation to . It is important to mention that the L1 norm of a function on a given domain corresponds to the iv maximum of its absolute value on the domain. Note that depends on two parameters, m and n, and the relation between and the L1 norm depends on the regime at which m and n change as goes to in nity. Studying the behavior of the L1 norm is linked to the study of the set E(D) which is the set of accumulation points of log(jjF jj1)= log : One of our main results is that [7=36; 1=4] E(B2) [1=18; 1=4]: The thesis is organized as follows. Introduction and main results are presented in chapter 1. In chapter 2 we review some well-known facts regarding the eigenfunctions of the Laplacian on the disk and the properties of the Bessel functions. In chapter 3 we prove results on pointwise growth of eigenfunctions. In particular, we show that, if m=n ! 0, then, for any xed point (r; ) on D, the value of F (r; ) decreases exponentially as ! 1. In chapter 4 we study the growth of the L1 norm. Eigenfunctions of the Neumann problem are discussed in chapter 5. Some numerical results are presented in chapter 6. A discussion and a summary of our work could be found in chapter 7.
Wu, Sin-Rong, and 吳欣容. "The Collocation Trefftz Method for Laplace''s Equation on Annular Shaped Domains, Circular and Elliptic Boundaries." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/83501098040512497269.
Повний текст джерела國立中山大學
應用數學系研究所
99
The collocation Trefftz method (CTM) proposed in [36] is employed to annular shaped domains, and new error analysis is made to yield the optimal convergence rates. This popular method is then applied to the special case: the Dirichlet problems on circular domains with circular holes, and comparisons are made with the null field method (NFM) proposed , and new interior field method (IFM) proposed in [35], to find out that both errors and condition numbers are smaller. Recently, for circular domains with circular holes, the null fields method (NFM) is proposed by Chen and his groups. In NFM, the fundamental solutions (FS) with the source nodes Q outside of the solution domains are used in the Green formulas, and the FS are replaced by their series expansions. The Fourier expansions of the known or the unknown Dirichlet and Neumann boundary conditions on the circular boundaries are chosen, so that the explicit discrete equations can be easily obtained by means of orthogonality of Fourier functions. The NFM has been applied to elliptic equations and eigenvalue problems in circular domains with multiple holes, reported in many papers; here we cite those for Laplace’s equation only (see [18, 19, 20]). For the boundary integral equation (BIE) of the first kind, the trigonometric functions are used in Arnold [4, 5], and error analysis is made for infinite smooth solutions, to derive the exponential convergence rates. In Cheng’s Dissertation [21, 22], for BIE of the first kind, the source nodes are located outside of the solution domain, the linear combination of fundamental solutions are used, and error analysis is made only for circular domains. This fact implies that not only can the CTM be applied to arbitrary domains, but also a better numerical performance is provided. Since the algorithms of the CTM is simple and its programming is easy, the CTM is strongly recommended to replace the NFM for circular domains with circular holes in engineering problems.
Єсаян, Геворг Артурович. "Конформні відображення областей, які обмежені декількома колами". Магістерська робота, 2020. https://dspace.znu.edu.ua/jspui/handle/12345/3444.
Повний текст джерелаUA : Робота викладена на 51 сторінках друкованого тексту, містить 17 рисунків, 12 джерел. Об’єкт дослідження – конформні відображення областей, обмежених колами. Предмет дослідження – основні методи побудови конформних відображень однозв’язних та многозв’язних областей, особливості побудови таких відображень. Мета роботи: побудувати конформні відображення областей, обмежених колами за допомогою елементарних функцій. Метод дослідження: аналітичний. У кваліфікаційній роботі розглянуто деякі розділи теорії конформних відображень, зокрема, теорія аналітичних функцій, наведено основні властивості лінійних, дробово-лінійних та інших елементарних функцій. Досліджено відображення, які побудовано за допомогою цих функцій. Особливу увагу приділено теорії многозв’язних областей, побудовано і досліджено відображення областей, обмежених декількома колами. Наведено приклади застосування таких відображень.
EN : The work is presented on 51 pages of printed text, 17 figures, 12 references. The object of the study is the conformal mapping of the domains bounded by several circles. The subject of the study is the basic methods of constructing conformal mappings of one and multiconnected domains, the peculiarities of constructing such mappings. The aim of the study is construct conformal mapping of some domains bounded by several circles with the help of elementary functions. The method of research is analytical. In the Master`s Qualification Thesis some sections of the theory of conformal mappings are considered, in particular, the theory of analytic functions, the main properties of linear, fractional-linear and other elementary functions are given. The mapping that was constructed using these functions is investigated. Particular attention is paid to the theory of multiconnected domains, the mappings of domains bounded by several circles are constructed and investigated. Examples of the use of such mappings are given.