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Tesi sul tema "Nodal"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Georgiev, Bogdan [Verfasser]. "On the geometry of nodal sets and nodal domains / Bogdan Georgiev." Bonn : Universitäts- und Landesbibliothek Bonn, 2018. http://d-nb.info/117378960X/34.

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2

Davies, Brian E., Graham M. L. Gladwell, Josef Leydold, and Peter F. Stadler. "Discrete Nodal Domain Theorems." Department of Statistics and Mathematics, Abt. f. Angewandte Statistik u. Datenverarbeitung, WU Vienna University of Economics and Business, 2000. http://epub.wu.ac.at/976/1/document.pdf.

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3

Davies, Brian E., Josef Leydold, and Peter F. Stadler. "Discrete Nodal Domain Theorems." Department of Statistics and Mathematics, Abt. f. Angewandte Statistik u. Datenverarbeitung, WU Vienna University of Economics and Business, 2000. http://epub.wu.ac.at/1674/1/document.pdf.

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4

Stålhammar, Marcus. "Knotted Nodal Band Structures." Licentiate thesis, Stockholms universitet, Fysikum, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-176063.

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It is well known that in conventional three dimensional (3D) Hermitian two band models, the intersections between the energy bands are generically given by points. The typical example are Weyl semimetals, where these singular points can be effectively described as Weyl fermions in the low energy regime. By explicitly imposing discrete symmetries or fine-tuning, the intersection can form higher- dimensional nodal structures, e.g. nodal lines. By instead considering dissipative contributions to such a system, the degeneracies will generically take the form of closed 1D curves, consisting of exce

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5

Putta, Sunil Kumar. "Nodal Resistance Measurement System." Thesis, University of North Texas, 2005. https://digital.library.unt.edu/ark:/67531/metadc5568/.

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The latest development in the measurement techniques has resulted in fast improvements in the instruments used for measurement of various electrical quantities. A common problem in such instruments is the automation of acquiring, retrieving and controlling the measurements by a computer or a laptop. In this study, nodal resistance measurement (NRM) system is developed to solve the above problem. The purpose of this study is to design and develop a compact electronic board, which measures electrical resistance, and a computer or a laptop controls the board. For the above purpose, surface noda

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6

ZHAO, YAN. "Deformations of nodal surfaces." Doctoral thesis, Università degli Studi di Milano, 2016. http://hdl.handle.net/2434/453882.

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In this thesis, we studied the Hodge theory and deformation theory of nodal surfaces. We showed that nodal surfaces in the projective 3-space satisfy the infinitesimal Torelli property. We considered families of examples of even nodal surfaces, that is, those endowed with a double cover branched on the nodes. We gave a new geometrical construction of even 56-nodal sextic surfaces, while we proved, using existing constructions, that the sub-Hodge structure of type (1,26,1) on the double cover S of any even 40-nodal sextic surface cannot be simple. We also demonstrated ways to compute sheaves of

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7

Komendarczyk, Rafal. "Nodal sets and contact structures." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-05192006-231553/.

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Thesis (Ph. D.)--Mathematics, Georgia Institute of Technology, 2007.<br>Belegradek, Igor, Committee Member ; Ghrist, Robert, Committee Chair ; Harrell, Evans, Committee Member ; Etnyre, John, Committee Member ; Symington, Margaret, Committee Co-Chair.

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8

Andersson, Linn. "Nodal governance och svensk terrorismbekämpning." Thesis, Försvarshögskolan, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-3496.

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Den här uppsatsen handlar om nodal governance som teori och analysverktyg. Syftet med uppsatsen är att undersöka på vilket sätt nodal governance är användbart i analysen av en svensk förvaltningskontext där främst offentliga aktörer samverkar och vilka teoretiska och metodologiska problem det eventuellt för med sig. Teorin har applicerats på en fallstudie som analyserar ett fall; svensk terrorismbekämpning. Analysen har visat att visat på teoretiska utvecklingsmöjligheter för nodal governance. Dessutom har förslag till förfining av analysverktyget kunnat presenteras. Studien har visat på möjl

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9

Williams, Ian George. "Nodal domains of quantum maps." Thesis, University of Bristol, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435420.

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10

Beal, Craig Rubidge. "Improved rehomogenization techniques for nodal methods." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/19277.

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11

Bourget, Alain. "Nodal statistics for the Lame ensemble." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37872.

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The Lame polynomials naturally arise when separating variables in Laplace's equation in elliptic-spherical coordinates. The products of these polynomials form a class of spherical harmonics, which are the joint eigenfunctions of a quantum completely integrable system of commuting, second-order differential operators P0 = DSN , P2,..., PN -1 acting on Cinfinity( SN ). These operators depend on parameters and thus constitute an ensemble.<br>In the main result presented in this thesis, we compute the limiting mean level spacings distribution for the zeroes of Lame polynomials in various thermodyn

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12

Biyikoglu, Türker, Josef Leydold, and Peter F. Stadler. "Nodal Domain Theorems and Bipartite Subgraphs." Department of Statistics and Mathematics, Abt. f. Angewandte Statistik u. Datenverarbeitung, WU Vienna University of Economics and Business, 2005. http://epub.wu.ac.at/626/1/document.pdf.

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The Discrete Nodal Domain Theorem states that an eigenfunction of the k-th largest eigenvalue of a generalized graph Laplacian has at most k (weak) nodal domains. We show that the number of strong nodal domains cannot exceed the size of a maximal induced bipartite subgraph and that this bound is sharp for generalized graph Laplacians. Similarly, the number of weak nodal domains is bounded by the size of a maximal bipartite minor. (author's abstract)<br>Series: Preprint Series / Department of Applied Statistics and Data Processing

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13

Davids, Virginia. "Molecular detection of melanoma nodal metastases." Master's thesis, University of Cape Town, 2002. http://hdl.handle.net/11427/3375.

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Includes bibliography.<br>The aim of this study was to develop a practical and reproducible multi-marker RT-PCR essay, with the emphasis on achieving maximum specificity for the detection of melanoma nodal metastases. A novel protocol for the efficient homogenisation of nodal tissue was developed, with clinical applicability as the objective.

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14

El, Hajj Layan. "Intersection bounds for nodal sets of Eigenfunctions." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=107810.

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We consider the zeros of a Neumann eigenfunction φ_λ on an analytic domainsolving the equation -∆ φ_λ =λ^2 φ_λ. We count the number n(λ;H) of intersection points of the nodal lines of φ_λ (components of the nodal set) with a fixed real analytic curve H contained in the interior of the domain. We identify a large family of curves H, namely C^ω-homotopic curves to the boundary, for which the nodal intersection bound for n(λ;H) is O(λ). This bound is consistent with Yau's famous conjecture on the measure of the nodal set.<br>On considère les zéros d'une fonction propre de Neumann φ_λ d'un domain

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15

Biyikoglu, Türker. "A Discrete Nodal Domain Theorem for Trees." Department of Statistics and Mathematics, Abt. f. Angewandte Statistik u. Datenverarbeitung, WU Vienna University of Economics and Business, 2002. http://epub.wu.ac.at/1270/1/document.pdf.

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Let G be a connected graph with n vertices and let x=(x1, ..., xn) be a real vector. A positive (negative) sign graph of the vector x is a maximal connected subgraph of G on vertices xi>0 (xi<0). For an eigenvalue of a generalized Laplacian of a tree: We characterize the maximal number of sign graphs of an eigenvector. We give an O(n2) time algorithm to find an eigenvector with maximum number of sign graphs and we show that finding an eigenvector with minimum number of sign graphs is an NP-complete problem. (author's abstract)<br>Series: Preprint Series / Department of Applied Statistics and D

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16

Smith, Andrew. "The fluid mechanics of embryonic nodal cilia." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4626/.

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Symmetry breaking of the left-right body axis is a crucial step in development for many vertebrate species. In many this is initiated with a directional cilia-driven fluid flow in the organising structure. This work focuses on the mouse and the zebrafish organising structures, the node and Kupffer's vesicle, wherein cilia perform a tilted rotation producing an asymmetric flow. Using singularities of Stokes flow, slender body theory and the boundary integral equation, a computational model of flow in the mouse node for a range of cilia configurations simulating developmental stages is developed

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17

Palmtag, Scott P. (Scott Parker). "Advanced nodal methods for MOX fuel analysis." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/9400.

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18

Jung, Sunghwan. "Growing crack analyses using nodal release technique." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/38075.

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19

Radford, Todd C. (Todd Craig) 1977. "Wireless nodal sensing for civil engineering systems." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/85747.

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20

Uchoa, Bruno. "Supercondutividade nodal em metais de transição dicalcogenados." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277832.

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Orientador: Guillermo Gerardo Cabrera Oyarzun<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin<br>Made available in DSpace on 2018-09-24T19:06:18Z (GMT). No. of bitstreams: 1 Uchoa_Bruno_D.pdf: 3173776 bytes, checksum: bbc84ac454d01ce5ee4aa4ae8b9d5b42 (MD5) Previous issue date: 2004<br>Resumo: Investigamos os efeitos macroscópicos de ondas das densidade de carga ( CDW) e da supercondutividade em sistemas organizados em planos que exibem quebra da simetria de inversão da rede (o que permitiria o aparecimento de piezoeletricidade), como nos metais de t

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21

Biyikoglu, Türker, Wim Hordijk, Josef Leydold, Tomaz Pisanski, and Peter F. Stadler. "Graph Laplacians, Nodal Domains, and Hyperplane Arrangements." Department of Statistics and Mathematics, Abt. f. Angewandte Statistik u. Datenverarbeitung, WU Vienna University of Economics and Business, 2002. http://epub.wu.ac.at/1036/1/document.pdf.

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Eigenvectors of the Laplacian of a graph G have received increasing attention in the recent past. Here we investigate their so-called nodal domains, i.e., the connected components of the maximal induced subgraphs of G on which an eigenvector \psi does not change sign. An analogue of Courant's nodal domain theorem provides upper bounds on the number of nodal domains depending on the location of \psi in the spectrum. This bound, however, is not sharp in general. In this contribution we consider the problem of computing minimal and maximal numbers of nodal domains for a particular graph. The clas

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22

Enani, Mohammad A. "MURR nodal analysis with simple interactive simulation /." free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9841283.

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23

Arnold, Walter. "Tumorvaskularisation als Prognosefaktor? : eine morphometrische Fall-Kontroll-Studie an T1/T2 -nodal-negativen und -nodal-positiven invasiven duktalen Mammakarzinomen /." Bern : [s.n.], 1997. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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24

Blackler, Alissa N. "Design of bone morphogenetic protein 2/nodal chimeras." Diss., [La Jolla] : University of California, San Diego, 2010. http://wwwlib.umi.com/cr/fullcit?p1477885.

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Thesis (M. S.)--University of California, San Diego, 2010.<br>Title from first page of PDF file (viewed July 12, 2010). Available via ProQuest Digital Dissertations. Includes bibliographical references (leaves 34-36).

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25

Zhu, Hongmei. "Courant's Nodal Line Theorem and its discrete counterparts." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ51246.pdf.

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26

Kaveh-Khorie, Siamak. "Nuclear reactor kinetics based on hierarchical nodal analysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0016/NQ57380.pdf.

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27

Koh, Dow-Mu. "Nodal Staging in Rectal Cancer Using MR Imaging." Thesis, Institute of Cancer Research (University Of London), 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.498611.

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28

Karageorge, Panos Demetrios. "On the geometric content on the nodal sequence." Thesis, University of Bristol, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500417.

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29

Jeannequin, Nicolas. "Nodal Spectral Element Method Applied To Electrocardiological Models." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526068.

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30

Maffucci, Riccardo Walter. "Nodal lines and surfaces of arithmetic random waves." Thesis, King's College London (University of London), 2018. https://kclpure.kcl.ac.uk/portal/en/theses/nodal-lines-and-surfaces-of-arithmetic-random-waves(daf91406-6414-4ca5-ae7f-78e36eb5632e).html.

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This thesis discusses various aspects of nodal sets of random Gaussian Laplace eigenfunctions (‘arithmetic random waves’) on the two- and three-dimensional tori. The first problem concerns the number of nodal intersections against a straight line segment in two dimensions. The expected intersections number, against any smooth curve, is universally proportional to the length of the ref-erence curve, times the wavenumber, independent of the geometry. I bounded the variance in the case of a straight line with rational slope. Without assuming rational slope, I proved that the same bound holds unco

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31

Shatilla, Youssef A. (Youssef Abdel-Moneim). "A simple quadratic nodal model for hexagonal geometry." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/34317.

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32

KITAGAWA, DAIJIRO. "Formation de l'espace nodal ferroviaire : paris et tokyo." Marne-la-vallée, ENPC, 1999. http://www.theses.fr/1999ENPC9906.

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Les nuds des reseaux sont devenus aujourd'hui un fondement de l'espace regional a paris et tokyo. Surtout depuis l'apparition du chemin de fer, les villes contiennent des moyens de transports quotidiens qui ne fonctionnent plus a leur echelle, mais a d'autres, plus vaste, regionale ou nationale. L'integration des reseaux dans la ville, conflictuelle ou non, n'etait que ponctuelle. Avec l'augmentation de la mobilite humaine et des distances parcourues et a parcourir, elle commence a se generaliser, assurant une dynamique urbaine et eventuellement le developpement urbain de la ville. Les nuds de

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33

Josi, Johannes. "Nodal rational sextics in the real projective plane." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS076.

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Cette thèse est consacrée à l’étude des courbes sextiques nodales, et en particulier des sextiques rationnelles, dans le plan projectif réel. Deux sextiques nodales réelles ayant k points doubles sont dites rigidement isotopes si elles peuvent être reliées par un chemin dans l’espace des sextiques nodales réelles ayant k points doubles. Le résultat principal de la première partie de la thèse donne une classification à isotopie rigide près des sextiques nodales irréductibles sans points doubles réels, généralisant la classification des sextiques non-singulières obtenue par Nikulin. La seconde p

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34

Wiener, Martin. "Lymphatic mapping and occult nodal metastasis in melanoma." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/13621/.

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Around 20% of patients, diagnosed with a clinically localized primary cutaneous melanoma, have occult lymph node metastases. Lymphatic mapping and sentinel node biopsy, using pre-operative lymphoscintigraphy, intra-operative blue dye injection and gamma probe localization, in most cases identifies the node or nodes most likely to contain occult metastases, if present. The presence or absence of such metastases is the most powerful prognostic indicator in this group of patients. However, a number of other factors related to the patient and the primary melanoma can be used to determine prognosis

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35

FLAMINI, FLAMINIO. "Families of nodal curves on smooth projective surfaces." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2000. http://hdl.handle.net/2108/74808.

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36

Yndestad, Harald. "The Lunar Nodal Cycle Influence on the Barents Sea." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Social Sciences and Technology Management, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-384.

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<p>The Barents Sea contains one of the most productive marine areas in the world. For centuries, Northeast Arctic cod and Norwegian spring spawning herring have been of vital importance for the Norwegian fish export industry and hence economic growth in Norway. It has been common knowledge that the biomass of different Barents Sea species experiences both shortand long-term fluctuations. These fluctuations have been explained by changes in herring cycles and cod cycles, or by the introduction of new fishing equipment, and more. Norwegian marine research began in earnest at the beginning of the

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37

Henry, Allan F. "Continued development of nodal methods for nuclear reactor analysis." MIT Energy Lab, 1986. http://hdl.handle.net/1721.1/27229.

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38

Yuen, Po-wing. "The study of nodal metastasis of oral tongue carcinoma." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B39793837.

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39

Kritchevski, Evgenij. "Nodal statistics of Heine-Stieltjes and Van Vleck polynomials." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=81348.

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We study the polynomial solutions of the Lame differential equation Azy'' z+2Bz y'z+C zyz=0 where A(z), B( z), C(z) ∈ C [z] are polynomials of degree N + 1, N and N - 1 respectively. We review classical results concerning the location of the zeros of y(z) and C(z) and their electrostatic interpretation. Asymptotic distribution of the zeros as the degree K of y(z) approaches infinity is then discussed. We also derive numerical methods that allow us to compute solutions of high degree K and present a variety of new fine experimental results such as the asymptotic nearest neighbor spacing

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40

Andrew, Rebecca Louise. "The role of Arkadia in the nodal signal pathway." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401212.

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41

Yuen, Po-wing, and 袁寶榮. "The study of nodal metastasis of oral tongue carcinoma." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B39793837.

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42

Wu, Xuewei, and 吴雪伟. "Isthmin, a novel extracellular regulator in nodal signaling pathway." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://sunzi.lib.hku.hk/hkuto/record/B45586573.

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43

Gao, Yuan Gene, and 高远. "Type IIA procollagen and the regulation of nodal signaling." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B45982272.

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44

Mohamed, Amr S. (Amr Saad Galal). "A transient nodal method accounting for multigroup transport effects." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/32592.

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45

Pellegrino, Paulo Eduardo Mota. "Estudo de estabilidade atraves do balanço nodal de potencia." [s.n.], 1995. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259911.

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Orientador: Sigmar Maurer Deckmann<br>Dissertação (mestrado) - Universidade Estadual de Campinas. Faculdade de Engenharia Eletrica<br>Made available in DSpace on 2018-07-20T10:19:31Z (GMT). No. of bitstreams: 1 Pellegrino_PauloEduardoMota_M.pdf: 4742203 bytes, checksum: 0efad1df4c3d10aa2ffb45775e38d387 (MD5) Previous issue date: 1995<br>Resumo: Este trabalho tem como meta descrever um método para solução dos problemas de estabilidade de médio e longo prazo utilizando o conceito de Balanço Nodal de Potência BNP. A base deste novo método é sua formulação como um problema de fluxo de potência e

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Morazzo, Sofia Faes. "A potencial função do nodal na endometrose da égua." Master's thesis, Universidade de Lisboa, Faculdade de Medicina Veterinária, 2017. http://hdl.handle.net/10400.5/14039.

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Dissertação de Mestrado Integrado em Medicina Veterinária<br>Alguns membros da superfamília do TGFβ, tais como o Nodal e o TGFβ1, têm um papel importante na reprodução da égua, sendo que a sua disfunção pode contribuir para patologias uterinas. A endometrose é uma doença degenerativa em que o endométrio normal vai sendo substituído por tecido fibrótico. O objectivo deste estudo consistiu em avaliar: (i) como o Nodal pode influenciar o nível de mRNA dos recetores da PGE2 (EP2; EP4), do TGFβ1 (ALK5; TGFRII), e os próprios (ALK4; ALK7), e ainda, a secreção de prostaglandinas (PGs; PGE2; PGF2α) no

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47

Rogers, Katherine Wallace. "Mesendoderm Patterning by the Nodal/Lefty Activator/Inhibitor System." Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:14226039.

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During zebrafish embryogenesis, a gradient of the secreted TGFβ ligand Nodal induces expression of mesendodermal genes in an exposure-dependent manner, and also induces expression of the secreted Nodal feedback inhibitor Lefty. The long-range Lefty gradient dampens signaling by the shorter-range Nodal gradient, and together they are required for proper patterning of the germ layers. My research has addressed two fundamental questions about this patterning system: 1) How are the distinct ranges of Nodal and Lefty achieved, and 2) What is the role of Lefty-mediated feedback inhibition in this pa

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48

Leydold, Josef. "On the number of nodal domains of spherical harmonics." Institut für Statistik und Mathematik, Abt. f. Angewandte Statistik u. Datenverarbeitung, WU Vienna University of Economics and Business, 1993. http://epub.wu.ac.at/1050/1/document.pdf.

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It is well known that the n-th eigenfunction to one-dimensional Sturm-Liouville eigenvalue problems has exactly n-1 nodes, i.e. non-degenerate zeros. For higher dimensions, it is much more complicated to obtain general statements on the zeros of eigenfunctions. The author states a new conjecture on the number of nodal domains of spherical harmonics, i.e. of connected components of S^2 \ N(u) with the nodal set N(u) = (x in S^2 : u(x) = 0) of the eigenfunction u, and proves it for the first six eigenvalues. It is a sharp upper bound, thus improving known bounds as the Courant nodal domain theor

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Ilas, Germina. "A Monte Carlo based nodal diffusion model for criticality analysis and application of high-order cross section homogenization method of two-group nodal diffusion." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/16092.

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Muñoz, Castañeda Ángel Luis [Verfasser]. "Principal G-bundles on nodal curves / Ángel Luis Muñoz Castañeda." Berlin : Freie Universität Berlin, 2017. http://d-nb.info/1139709437/34.

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