Bibliografías temáticas / Zonal structures

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Literatura académica sobre el tema "Zonal structures"

Autor: Grafiati
Publicado: 21 de diciembre de 2024

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Artículos de revistas sobre el tema "Zonal structures"

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Falessi, Matteo Valerio y Fulvio Zonca. "Transport theory of phase space zonal structures". Physics of Plasmas 26, n.º 2 (febrero de 2019): 022305. http://dx.doi.org/10.1063/1.5063874.

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Liu, Libo, Yuyan Yang, Huijun Le, Yiding Chen, Ruilong Zhang, Hui Zhang, Wenjie Sun y Guozhu Li. "Unexpected Regional Zonal Structures in Low Latitude Ionosphere Call for a High Longitudinal Resolution of the Global Ionospheric Maps". Remote Sensing 14, n.º 10 (11 de mayo de 2022): 2315. http://dx.doi.org/10.3390/rs14102315.

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This study reports unexpected strong longitudinal structures from Global Navigation Satellite System (GNSS) derived total electron content (TEC) observations in the low-latitude ionosphere over Asia. The observations during 2019–2020 show diverse patterns in the zonal difference of regional TEC, even under geomagnetically quiet conditions. The TEC in the northern hemisphere occasionally exhibits drastic zonal gradients. The intense regional gradients in TEC span a longitudinal extent of about 20°. The higher values may appear on the east or the west side. Strong zonal gradients may appear in all seasons, regardless of geomagnetically quiet or active conditions. The 15 December 2019 and 16 March 2020 cases depict an intense zonal differences cluster in the narrow latitudinal band of 16°N to 28°N, spanning a regional scale smaller than the normal longitudinal structures. In contrast, the Global Ionospheric Maps (GIMs) with a longitudinal resolution of 5° show a much flatter zonal picture. Such intense and regional-scale zonal structures in the low-latitude ionosphere call for a high zonal resolution of GIMs in terms of better geographically distributed observations. Notably, no counterpart regional structures are found at the conjugated points in the southern hemisphere during the two cases. Although the physical drivers are not certain, the appearance only in the northern hemisphere possibly excludes the dominant contribution to forming the regional structures from the equatorial electric field.
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3

Bakas, Nikolaos A. y Petros J. Ioannou. "A theory for the emergence of coherent structures in beta-plane turbulence". Journal of Fluid Mechanics 740 (6 de enero de 2014): 312–41. http://dx.doi.org/10.1017/jfm.2013.663.

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AbstractPlanetary turbulent flows are observed to self-organize into large-scale structures such as zonal jets and coherent vortices. One of the simplest models of planetary turbulence is obtained by considering a barotropic flow on a beta-plane channel with turbulence sustained by random stirring. Nonlinear integrations of this model show that as the energy input rate of the forcing is increased, the homogeneity of the flow is broken with the emergence of non-zonal, coherent, westward propagating structures and at larger energy input rates by the emergence of zonal jets. We study the emergence of non-zonal coherent structures using a non-equilibrium statistical theory, stochastic structural stability theory (S3T, previously referred to as SSST). S3T directly models a second-order approximation to the statistical mean turbulent state and allows the identification of statistical turbulent equilibria and study of their stability. Using S3T, the bifurcation properties of the homogeneous state in barotropic beta-plane turbulence are determined. Analytic expressions for the zonal and non-zonal large-scale coherent flows that emerge as a result of structural instability are obtained. Through numerical integrations of the S3T dynamical system, it is found that the unstable structures equilibrate at finite amplitude. Numerical simulations of the nonlinear equations confirm the characteristics (scale, amplitude and phase speed) of the structures predicted by S3T.
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Dorset, Douglas L., Christopher J. Gilmore, Jose Luis Jorda y Stavros Nicolopoulos. "Direct electron crystallographic determination of zeolite zonal structures". Ultramicroscopy 107, n.º 6-7 (junio de 2007): 462–73. http://dx.doi.org/10.1016/j.ultramic.2006.05.013.

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Ilgisonis, V. I., V. P. Lakhin, N. A. Marusov, A. I. Smolyakov y E. A. Sorokina. "Low-frequency zonal flow eigen-structures in tokamak plasmas". Nuclear Fusion 62, n.º 6 (30 de marzo de 2022): 066002. http://dx.doi.org/10.1088/1741-4326/ac3f4c.

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Abstract The nonlocal eigenmode analysis of low-frequency zonal flows (ZFs) in toroidally rotating tokamak plasmas is performed in the framework of the reduced one-fluid ideal magnetohydrodynamic model. It is shown that for typical profiles of plasma parameters toroidal plasma rotation results in the global ZF formation on the periphery of plasma column. For some types of equilibria these ZFs are aperiodically unstable that leads to the excitation of the differential plasma rotation at the tokamak plasma edge.
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6

Singh, Rameswar, R. Singh, P. Kaw, Ö. D. Gürcan y P. H. Diamond. "Coherent structures in ion temperature gradient turbulence-zonal flow". Physics of Plasmas 21, n.º 10 (octubre de 2014): 102306. http://dx.doi.org/10.1063/1.4898207.

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SANDBERG, INGMAR y V. P. PAVLENKO. "Zonal flow in toroidal ion temperature gradient mode turbulence". Journal of Plasma Physics 73, n.º 4 (agosto de 2007): 565–73. http://dx.doi.org/10.1017/s0022377806004831.

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AbstractThe properties of zonal flows in the toroidal ion temperature gradient mode turbulence are investigated taking into account the polarization drift effects. The stability criterion and the characteristic oscillation frequency of the zonal flow are determined in terms of the spectra of turbulent fluctuations. The nonlinear evolution of zonal flows may lead to the formation of stationary long-lived coherent structures supporting stationary shear layers. These results indicate the existence of regions with reduced levels of anomalous transport attributed to zonal flows generalizing previous findings regarding zonal flows in electron drift turbulence.
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8

Golebiowska, Aleksandra A. y Syam P. Nukavarapu. "Bio-inspired zonal-structured matrices for bone-cartilage interface engineering". Biofabrication 14, n.º 2 (25 de febrero de 2022): 025016. http://dx.doi.org/10.1088/1758-5090/ac5413.

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Abstract Design and development of scaffold structures for osteochondral (OC) interface regeneration is a significant engineering challenge. Recent efforts are aimed at recapitulating the unique compositional and hierarchical structure of an OC interface. Conventional scaffold fabrication techniques often have limited design control and reproducibility, and the development of OC scaffolds with zonal hierarchy and structural integrity between zones is especially challenging. In this study, a series of multi-zonal and gradient structures were designed and fabricated using three-dimensional bioprinting. We developed OC scaffolds with bi-phasic and tri-phasic configurations to support the zonal structure of OC tissue, and gradient scaffold configurations to enable smooth transitions between the zones to more closely mimic a bone-cartilage interface. A biodegradable polymer, polylactic acid, was used for the fabrication of zonal/gradient scaffolds to provide mechanical strength and support OC function. The formation of the multi-zonal and gradient scaffolds was confirmed through scanning electron microscopy imaging and micro-computed tomography scanning. Precisely controlled hierarchy with tunable porosity along the scaffold length established the formation of the bio-inspired scaffolds with different zones/gradient structure. In addition, we also developed a novel bioprinting method to selectively introduce cells into desired scaffold zones of the zonal/gradient scaffolds via concurrent printing of a cell-laden hydrogel within the porous template. Live/dead staining of the cell-laden hydrogel introduced in the cartilage zone showed uniform cell distribution with high cell viability. Overall, our study developed bio-inspired scaffold structures with structural hierarchy and mechanical integrity for bone-cartilage interface engineering.
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9

Helfrich, Karl R. y Joseph Pedlosky. "Time-dependent isolated anomalies in zonal flows". Journal of Fluid Mechanics 251 (junio de 1993): 377–409. http://dx.doi.org/10.1017/s0022112093003453.

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A theory is developed for time-dependent coherent structures in a marginally stable atmospheric zonal flow. The coherent structures have the form of solitary waves travelling in the zonal direction. Analytical solutions are found for stationary solitary waves but these are shown to be always unstable. The instability manifests itself either as a fission of the structure subsequently emitting two oppositely directed travelling solitary waves or as an implosion in which the structure becomes increasingly more narrow and intense. Which of the two occurs depends sensitively on initial conditions. These solitary waves are stable in head-on collisions only if their joint zonally integrated amplitude is less than a critical value; otherwise, the implosion instability occurs. General initial conditions can give rise to solitary waves which either split, implode, or break down to form a train of nonlinear wave packets. A scenario for the birth and decay of isolated disturbances is given, utilizing the slow parametric transit of the marginal stability curve of the background zonal flow.
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Zhou, Yao, Hongxuan Zhu y I. Y. Dodin. "Solitary zonal structures in subcritical drift waves: a minimum model". Plasma Physics and Controlled Fusion 62, n.º 4 (10 de marzo de 2020): 045021. http://dx.doi.org/10.1088/1361-6587/ab78f3.

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Tesis sobre el tema "Zonal structures"

1

Sama, Juvert Njeck. "The effect of beta on the nonlinear generation of zonal structures in experimentally relevant tokamak plasmas". Electronic Thesis or Diss., Université de Lorraine, 2024. https://docnum.univ-lorraine.fr/ulprive/DDOC_T_2024_0111_SAMA.pdf.

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Les gradients spatiaux de température et de densité dans les plasmas de tokamaks excitent les micro-instabilités, qui interagissent de manière non linéaire pour former la turbulence. La turbulence augmente le transport de chaleur et de particules, réduisant le temps de confinement de l'énergie. Il est important de comprendre la dynamique des turbulences car il est nécessaire de réunir les conditions d'une combustion auto-entretenue dans un réacteur de fusion. Les structures zonales (ZS), c'est-à-dire les perturbations axisymétriques d'un plasma de tokamak, sont générées par la turbulence et jouent un rôle important dans sa saturation auto-entretenue. Il existe deux types de ZS : les écoulements zonaux à fréquence nulle (ZFZF) et les modes acoustiques géodésiques (GAM). Il a récemment été démontré que la dynamique des GAM change lorsqu'on passe du mode L au mode I et du mode I au mode H. En particulier, les GAM sont observés expérimentalement en mode de confinement faible (mode L) et en mode de confinement intermédiaire (mode I). En particulier, les GAM sont observés expérimentalement en mode de confinement faible (mode L) et en mode de confinement intermédiaire (mode I), et ils sont plus rarement observés en mode de confinement élevé (mode H). Un premier modèle linéaire expliquant ce comportement a été construit en utilisant la combinaison de leur Landau et de l'amortissement du continuum , qui affecte les GAMs plus fortement en mode H. Les structures zonales générées par les modes GAM peuvent interagir et se coupler avec les structures zonales générées par la turbulence induite par les instabilités, telles que les modes de type ITG (gradient de température des ions). Les effets cinétiques et de piégeage des particules, qui peuvent s'opposer à l'amortissement Landau, peuvent jouer un rôle dominant dans la dynamique des écoulements zonaux générés par les ITG. Il est particulièrement important de comprendre la dynamique des écoulements zonaux, leur mécanisme d'excitation et leur interaction avec les différentes instabilités du plasma et la turbulence. Dans cette thèse, la dynamique des GAM et des ZFZF est étudiée dans différentes configurations. Dans le chapitre deux, nous étudions la dynamique linéaire des modes acoustiques géodésiques dans un plasma anisotrope. Nous avons étudié les effets de l'anisotropie de la température des ions qui peut être introduite par divers mécanismes de chauffage du plasma, tels que l'injection d'un faisceau neutre (NBI), le chauffage par résonance cyclotronique ionique (ICRH) et le chauffage par résonance cyclotronique électronique (ECRH). Dans le troisième chapitre de cette thèse, nous avons développé une théorie linéaire globale pour étudier la dynamique linéaire des ondes de plasma dans la géométrie du tokamak pour des fonctions de distribution de particules arbitraires. Nous présentons une expression généralisée de la fréquence GAM en termes de fonction de distribution des espèces d'ions et du mode. L'équation de structure de mode généralisée de l'équation de structure de mode d'Alfven/ITG est dans l'unité de grand nombre de mode poloïdal. Dans le chapitre quatre, le code de simulation numérique ORB5 est discuté en détail, en soulignant toutes les hypothèses et les domaines d'applicabilité. Dans le chapitre cinq. Notre objectif principal était d'étudier l'impact des écoulements zonaux entraînés par les modes d'Alfven sur les instabilités ITG linéaires. Nous avons isolé cet effet des simulations électromagnétiques non linéaires autocohérentes et l'avons testé indépendamment en utilisant un ensemble d'outils numériques. Dans le chapitre six, nous passons en revue le modèle des "modes de particules". Nous montrons que la synchronisation des modes de particules conduit à l'amplification des flux zonaux, qui se produit même lorsque l'ion et les électrons admettent la même température
Spatial gradients in temperature and density in tokamak plasmas excite micro-instabilities, which interact non-linearly to form turbulence. Turbulence increases heat and particle transport, reducing the energy confinement time. Understanding turbulence dynamics is important to achieving the conditions for self-sustained combustion in a fusion reactor. Zonal structures (ZS), i.e., the axisymmetric perturbations of a tokamak plasma, are generated by turbulence and play an important role in its self-consistent saturation. Two types of ZS exist: zero-frequency zonal flows (ZFZF) and geodesic acoustic modes (GAM). Recent electrostatic nonlinear studies of turbulence-excited GAMs in Asdex upgrade (AUG) have shown that radially extended GAM structures can be excited by turbulence. The dynamics of GAMs have recently been shown to change when going from low confinement mode (L-mode) to intermediate confinement mode (I-mode) and from I-mode to high confinement mode (H mode). In particular, GAMs are observed experimentally in L-mode and I-mode and are more rarely observed in H-mode. A first linear model explaining this behavior was constructed using the combination of their Landau and continuum damping, which affects GAMs more strongly in H mode. Zonal structures generated by the GAM modes can interact and couple with the zonal structures generated by the turbulence induced by the instabilities, such as the so-called ITG (Ion Temperature Gradient) type modes. Kinetic and particle trapping effects can oppose Landau damping and dominate the zonal flow dynamics generated by ITGs. It is particularly important to understand the dynamics of zonal flows, their excitation mechanism, and their interaction with different plasma instabilities and turbulence. In this thesis, the dynamics of GAMs and ZFZF are studied in different configurations. In Chapter Two, we study the linear dynamics of geodesic acoustic modes in anisotropic plasma. We studied the effects of ion temperature anisotropy that can be introduced by various plasma heating mechanisms, such as neutral beam injection (NBI), ion cyclotron resonance heating (ICRH), and electron cyclotron resonance heating (ECRH). We show that ion temperature anisotropy can significantly modify the damping rate of the geodesic acoustic mode. In the third chapter of this thesis, we developed a global linear theory to study the linear dynamics of plasma waves in tokamak geometry for arbitrary particle distribution functions. We report a generalized expression of the GAM frequency in terms of the distribution function of the ion species and the mode. The generalized mode structure equation of the Alfven/ITG mode structure equation is in the large poloidal mode number unit. In chapter four, the numerical simulation code ORB5 is discussed in detail, pointing out all assumptions and domains of applicability. In chapter five. Our main focus was investigating the impact of zonal flows forced-driven by Alfven modes on linear ITG instabilities. We isolated this effect from self-consistent nonlinear electromagnetic simulations and tested it independently using a set of numerical tools that will be discussed later. We show that zonal flows forced-driven by Alfven modes can significantly mitigate ITG instabilities in an experimentally relevant scenario magnetic geometry. In chapter six, we review the "particle mode" model. We show that the synchronization of particle modes leads to the amplification of the zonal flows, which occurs even when the ions and electrons admit to the same temperature
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Miranda, Alan Wanderley Albuquerque. "Evolução estrutural das zonas de cisalhamento dúcteis na porção centro-leste do domínio da Zona Transversal na Província Borborema". Universidade do Estado do Rio de Janeiro, 2010. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=2912.

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A área estudada está inserida no Domínio Transversal da Província Borborema. As unidades litoestratigráficas que compõem o embasamento paleoproterozócio (riaciano) são representadas por rochas ortoderivadas dos Complexos Salgadinho e Cabaceiras. Esses complexos foram individualizados de acordo com as suas diferenças composicionais, texturais e/ou geocronológicas. As rochas metassedimentares de idade paleoproterozóica (Orosiriano) foram interpretadas como constituintes do Complexo Sertânia. O magmatismo no estateriano é caracterizado por ortognaisses sienogranítcos da Suíte Carnoió-Caturité e por metanortositos do Complexo Metanortosítico Boqueirão. As unidades litoestratigráficas do Neoproterozóico são representadas por sucessões metassedimentares Criogenianas do Complexo Surubim e ortognaisses granodioríticos e sienograníticos do início do Ediacarano, denominados de Complexo Sumé e Ortognaisse Riacho de Santo Antônio, respectivamente. O magmatismo granítico do Ediacarano foi caracterizado pelo alojamento dos Plutons Inácio Pereira e Marinho. Os dados geocronológicos (U-Pb em zircão) obtidos indicam, no mínimo, o desenvolvimento de três eventos tectono-magmáticos. As idades de 2042 + 11Ma e 1996 + 13Ma obtidas nos ortoanfibolitos do Complexo Cabaceiras foram interpretadas como a idade de cristalização do protólito e metamorfismo, respectivamente. A idade de 1638 + 13Ma proveniente de hornblenda ortognaisse sienogranítico da Suíte Carnoió-Caturité foi interpretada como a idade de cristalização do protólito, marcando um evento magmático Estateriano de afinidade anorogênica. A idade de 550 + 3.1Ma encontrada em monzogranito porfirítico do Pluton Marinho é um registro do último evento magmático no final do Ediacarano, associado ao estágio tardio de desenvolvimento da Zona de Cisalhamento Coxixola. Os dados estruturais permitiram a individualização de três fases de deformação dúcteis, individualizadas como D1, D2 e D3. A fase D1 foi responsável pela geração de uma foliação S1, observada somente na charneira de dobras F2. O evento D2 é assinalado por uma tectônica contracional com transporte para NNW, observado a partir de bandas de cisalhamento assimétricas e dobras de arrasto em cortes paralelos a lineação de estiramento (L2x). Zonas de cisalhamento dúcteis de geometria e cinemática distintas desenvolveram-se durante a fase D3. As zonas de Cisalhamento Boa Vista, Carnoió e Congo estão orientadas na direção NE-SW e exibem cinemática sinistral em cortes paralelos à lineação de estiramento (L3x). As terminações meridionais dessas zonas de cisalhamento estão conectadas com a Zona de Cisalhamento Coxixola. Essa zona de cisalhamento, de direção WSW-ENE e cinemática destral, atravessa toda a área de estudo, com uma espessura média de rochas miloníticas de 300m. A Zona de Cisalhamento Inácio Pereira ocorre na porção leste da área de estudo, orientada na direção WNW-ESE. A análise geométrica e cinemática dessa zona de cisalhamento sugere uma evolução deformacional através de regime transpressivo oblíquo sinistral. O padrão anastomosado final resultante do desenvolvimento de todas as zonas de cisalhamento da área é relacionado à evolução estrutural de um sistema de zonas de cisalhamento dúcteis conjugadas.
The studied area is inserted in the Transversal Domain of Borborema Province. The Paleoproterozoic (Riacian) basement encompasses mainly by metaplutonic rocks from Salgadinho and Cabaceiras Complex. These complexes were individualized according to their compositional, textural and/or geochronological datas. The Paleoproterozoic (Orosirian) metasedimentary rocks were interpreted as components of Sertânia Complex. The Estatherian magmatic event is characterized by syenogranitic orthogneisses of the Carnoió-Caturité Suite and metaplutonic rocks of Metanorthositic Boqueirão Complex. The Neoproterozoic lithostratigraphic units are represented by Cryogenian metasedimentary successions of Complex Surubim and by Early-Ediacaran granodioritic and syenogranitic orthogneisses and of the Sumé Complex and Riacho de Santo Antonio orthogneisses, respectively. The Ediacaran granitic magmatism was characterized by the emplacement of Inácio Pereira and Marinho Plutons. The geochronological data (LA-ICPMS) indicate at least of three tectono-magmatic events. The 2042 + 13Ma and 1996 + 11Ma ages from amphibolites of Cabaceiras Complex were interpreted as the crystallization age of the protolith and metamorphism, respectively. The age of 1638 + 13Ma from the syenogranitic hornblende orthogneiss of Carnoió-Caturité Suite was interpreted as the crystallization age of the protolith, marking an Estatherian anorogenic magmatic event. The age of 550 + 3.1Ma acquired in a porphyritic monzogranite of Marinho Pluton is a record of the last magmatic event in the Late-Ediacaran, associated with the final stage of development of the Coxixola Shear Zone. The structural data allowed the individualization of three deformation phases, individualized as D1, D2 and D3. D1 was responsible for generating a S1 foliation, observed only at the hinge of F2 folds. The D2 event is marked by a thrust regime with transport to NNW, observed from asymmetrical shear bands and drag folds in sections parallel to stretching lineation (L2x). Ductile shear zones of different geometry and kinematics had been developed during the D3 phase. The NE-SW Boa Vista, Carnoió and Congo Shear zones exhibit sinistral kinematic in sections parallel to stretching lineation (L3x). The southern limits of these shear zones are connected with Coxixola Shear Zone. This WSW-ENE shear zone with dextral kinematics crosscut the entire studied area, with an average of 300m thickness of mylonitic rocks. The WNW-ESE Inácio Pereira Shear Zone is situated in the eastern portion of the studied area, shows geometric and kinematic characteristics in agreement with an evolution through an oblique-sinistral transpressive regime. The structural evolution of a system of conjugate ductile shear zones is responsible by anastomosed framework exposed in a map view.
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3

Uzawa, Ken. "Study of modulational instability and structure of zonal flows in fusion plasmas". Kyoto University, 2008. http://hdl.handle.net/2433/135587.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(エネルギー科学)
甲第13952号
エネ博第173号
新制||エネ||40(附属図書館)
UT51-2008-C868
京都大学大学院エネルギー科学研究科エネルギー基礎科学専攻
(主査)教授 岸本 泰明, 教授 近藤 克己, 教授 福山 淳
学位規則第4条第1項該当
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4

Chapman, Jamie. "The marsupial zona pellucida : its structure and glycoconjugate content". Title page, abstract and contents only, 2003. http://web4.library.adelaide.edu.au/theses/09PH/09phc4661.pdf.

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Bibliography: leaves 262-298. This thesis investigated the structure and glycoconjugate composition of the zona pellucida (ZP) surrounding marsupial oocytes and the changes that occur during ovarian development, following ovulation, and following cortical granule exocytosis. The glycoconjugates of the oviduct epithelial lining of the brushtail possum around the time of ovulation were also examined to determine if there was any contribution of the oviductal secretions to the post-ovulatory ZP.
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Koothan, Thillai. "Structural and functional analysis of zona pellucida". Thesis, University of Edinburgh, 1994. http://hdl.handle.net/1842/19905.

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The ability of the zona pellucida to mediate the species specific recognition of spermatozoa is due to a glycoprotein constituent of this structure, known as ZP3. In view of its important role in the initiation of fertilization, ZP3 has been identified as a suitable candidate for the development of a contraceptive vaccine. In order to generate recombinant marmoset ZP3 for immunization purposes a full length 1.3 kb insert encoding for marmoset ZP3 was cloned downstream of the malE gene to generate a fusion protein containing marZP3 and a maltose binding domain. This protein was found to be generated in a soluble form in aqueous solutions and the antigenic integrity of this molecule was demonstrated by it capacity to be recognized by a monoclonal antibody raised against human ZP3. This full length fusion protein has been purified by anion exchange chromatography and used to generate polyclonal antibodies. In addition to these in vitro studies on the generation of a recombinant marZP3 for active immunization purposes, in vivo studies have also been performed on the induction of active immunity against porcine ZP3. These studies have demonstrated that an important side effect of induction of immunity against a heterologous ZP3 antigen involves the depletion of the primordial follicle pool. Moreover this pathology could be transferred to non-immunized recipients by the passive transfer of antibody. These data raise the important question as to whether a similar pathology would be induced if homologous zona antigens were used for the induction of immunity. As a result of the work descriebd in this thesis, this question can now be addressed in the marmoset monkey using recombinant marZP3 as antigen.
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Massucatto, Armando José [UNESP]. "Caracterização estrutural do embasamento do Grupo Araí, na zona externa da faixa Brasília (GO)". Universidade Estadual Paulista (UNESP), 2003. http://hdl.handle.net/11449/103016.

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A área de estudo, objeto desta tese de doutoramento, situa-se na porção nordeste do estado de Goiás, na região de Cavalcante. Nesta região são encontradas rochas do embasamento da Faixa de Dobramentos Brasília, composto por rochas do Complexo Granítico-gnáissico, mega veios de quartzo e Formação Ticunzal. Recobrindo estas rochas são visíveis os metassedimentos do Grupo Araí. As rochas do embasamento da Faixa de Dobramentos Brasília na área de estudo se apresentam fortemente deformadas, mostrando uma alta complexidade estrutural, o que indica que foram submetidas a diferentes eventos deformacionais. Para um melhor entendimento da evolução geólogica da área buscou-se através de diferentes técnicas e ferramentas a separação dos eventos deformacionais que atuaram sobre a região. Os trabalhos realizados levaram a identificação de 5 foliações distintas, sendo que as mesmas foram hierarquizadas e separadas, em função de sua geração, em 3 eventos deformacionais. Para refinar a separação destes eventos deformacionais foram realizadas datações em muscovitas pertencentes às respectivas foliações, utilizando-se o método 40Ar/39Ar. O Evento denominado genericamente de 1, apresenta uma foliação (S1) com direção próxima a EW, mergulho subvertical. Tal foliação é gerada como resposta a uma compressão de direção próxima a NS. As datações realizadas em micas brancas formadas durante este evento, indicam idades mínimas de 1.5 Ga. O Evento 2, decorrente de uma compressão de direção próxima a EW, é responsável pela geração de uma foliação (S2) com direção próxima a NS, que apresenta um mergulho vertical. Associa-se a esta fase uma lineação de estiramento em geral vertical e localmente de baixo ângulo. As datações realizadas apontam para idades mínimas de 1.4 Ga, para micas brancas geradas durante este evento...
The studied area in this PhD thesis is located in the northeast portion of Goias State, near Cavalcante Town. Basement rocks of Brasilia Fold Belt, composed basically by Granitic-Gneiss Complex, mega quartz veinz and the Ticunzal Formation, characterize this area. Overlying these rocks are the Araí Group Metassediments. The basement rocks of Brasilia Fold Belt, in the studied area, are strongly deformed, showing a highly structural complexity, which indicate these rocks were submitted by different deformational events. For a better understanding of geological evolution, different techniques and tools to distinguish the deformational events have been applied. The work done defined the identification of five different foliations, which were ordered and separated in three different deformational events because its generations. To refine its events separation, 40Ar/39Ar dating in muscovites belonging in each foliation has been done. The Event denominated generally by 1 presents an EW direction foliation (S1) with a sub vertical dipping. Such foliation was generated as consequence for an NS direction compression. The dating done in white micas formed during this event, yielded a minimum age of 1.5 Ga. The Event 2, consequence of a close EW direction compression, generated a close NS direction foliation (S2) with vertical dipping. The white micas dating suggest a minimum age of 1.4 Ga for this event. Petrographic analysis indicated rocks that were submitted by the Events 1 and 2, were affected by similar metamorphism conditions, where might have reached temperatures between 450 and 500o C. The mega quartz veins possibly have been generated during the Event 2. Accomplished studies showing that its geometries are conformable with the cinematic aspects found in this event...(Complete abstract click electronic access below)
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Risbey, James S. (James Sydney). "An analysis of zonal mean atmospheric angular momentum and high cloud cover : periodicities, time-latitude structure, and cross correlations". Thesis, Massachusetts Institute of Technology, 1987. http://hdl.handle.net/1721.1/57727.

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Massucatto, Armando José. "Caracterização estrutural do embasamento do Grupo Araí, na zona externa da faixa Brasília (GO) /". Rio Claro : [s.n.], 2003. http://hdl.handle.net/11449/103016.

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Orientador: Luiz Sergio Amarante Simões
Banca: Nilson Francisquini Botelho
Banca: Marco Antonio Fonseca
Banca: Norberto Morales
Banca: Hans Dirk Ebert
Resumo: A área de estudo, objeto desta tese de doutoramento, situa-se na porção nordeste do estado de Goiás, na região de Cavalcante. Nesta região são encontradas rochas do embasamento da Faixa de Dobramentos Brasília, composto por rochas do Complexo Granítico-gnáissico, mega veios de quartzo e Formação Ticunzal. Recobrindo estas rochas são visíveis os metassedimentos do Grupo Araí. As rochas do embasamento da Faixa de Dobramentos Brasília na área de estudo se apresentam fortemente deformadas, mostrando uma alta complexidade estrutural, o que indica que foram submetidas a diferentes eventos deformacionais. Para um melhor entendimento da evolução geólogica da área buscou-se através de diferentes técnicas e ferramentas a separação dos eventos deformacionais que atuaram sobre a região. Os trabalhos realizados levaram a identificação de 5 foliações distintas, sendo que as mesmas foram hierarquizadas e separadas, em função de sua geração, em 3 eventos deformacionais. Para refinar a separação destes eventos deformacionais foram realizadas datações em muscovitas pertencentes às respectivas foliações, utilizando-se o método 40Ar/39Ar. O Evento denominado genericamente de 1, apresenta uma foliação (S1) com direção próxima a EW, mergulho subvertical. Tal foliação é gerada como resposta a uma compressão de direção próxima a NS. As datações realizadas em micas brancas formadas durante este evento, indicam idades mínimas de 1.5 Ga. O Evento 2, decorrente de uma compressão de direção próxima a EW, é responsável pela geração de uma foliação (S2) com direção próxima a NS, que apresenta um mergulho vertical. Associa-se a esta fase uma lineação de estiramento em geral vertical e localmente de baixo ângulo. As datações realizadas apontam para idades mínimas de 1.4 Ga, para micas brancas geradas durante este evento...(Resumo completo, clicar acesso eletrônico abaixo)
Abstract:The studied area in this PhD thesis is located in the northeast portion of Goias State, near Cavalcante Town. Basement rocks of Brasilia Fold Belt, composed basically by Granitic-Gneiss Complex, mega quartz veinz and the Ticunzal Formation, characterize this area. Overlying these rocks are the Araí Group Metassediments. The basement rocks of Brasilia Fold Belt, in the studied area, are strongly deformed, showing a highly structural complexity, which indicate these rocks were submitted by different deformational events. For a better understanding of geological evolution, different techniques and tools to distinguish the deformational events have been applied. The work done defined the identification of five different foliations, which were ordered and separated in three different deformational events because its generations. To refine its events separation, 40Ar/39Ar dating in muscovites belonging in each foliation has been done. The Event denominated generally by "1" presents an EW direction foliation (S1) with a sub vertical dipping. Such foliation was generated as consequence for an NS direction compression. The dating done in white micas formed during this event, yielded a minimum age of 1.5 Ga. The "Event 2", consequence of a close EW direction compression, generated a close NS direction foliation (S2) with vertical dipping. The white micas dating suggest a minimum age of 1.4 Ga for this event. Petrographic analysis indicated rocks that were submitted by the Events "1" and "2", were affected by similar metamorphism conditions, where might have reached temperatures between 450 and 500o C. The mega quartz veins possibly have been generated during the Event "2". Accomplished studies showing that its geometries are conformable with the cinematic aspects found in this event...(Complete abstract click electronic access below)
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Sartori, Jose Eduardo. "Reativação de falhas : o caso da Zona de Falha de Cássia/MG /". Rio Claro, 2018. http://hdl.handle.net/11449/152953.

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Orientador: Norberto Morales
Banca: Marcos Aurelio Farias de Oliveira
Banca: George Luiz Luvizotto
Banca: Francisco Sérgio Bernardes Ladeira
Banca: Alessandro Batezelli
Resumo: A Zona de Falha de Cássia corresponde a uma zona de falha transcorrente sinistral oblíqua orientada segundo a direção geral NNW-SSE. A estrutura se desenvolveu em decorrência de movimentações tardias do Cinturão de Cisalhamento Campo do Meio durante o Ciclo Orogênico Brasiliano. A Zona de Falha de Cássia está registrada através de uma faixa de rochas deformadas de largura variável entre 0,5 a 3,0 km, composta por rochas miloníticas, caracterizadas por deformação dúctil-rúptil em condições metamórficas de fácies xisto verde, zona da clorita. A descontinuidade foi reativada como uma zona de falha normal, com bloco baixo a sudoeste (reativação geométrica) durante o Neocretáceo, correlacionada com o Soerguimento do Alto Paranaíba. A reativação tectônica foi marcada por intensa brechação, cataclase e a formação de dois conjuntos de falhas normais com arranjo em blocos escalonados progressivamente rebaixados para oeste. As feições microestruturais e reações de alteração constatadas, juntamente com a ocorrência de pseudotaquilito permitiram inferir que estas rochas de falha foram desenvolvidas em profundidades inferiores a 11 km, com temperaturas menores que 300°C, provavelmente associadas a sismos. Uma segunda etapa de reativação está registrada através da formação de depósitos sedimentares argilosos e arenosos quaternários, respectivamente nas regiões de Cássia-Pratápolis e Desemboque. Tratam-se de depósitos correlativos de falha relacionados à movimentação da Zona de Falha de Cás... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The Cássia Fault Zone corresponds to an oblique sinistral transcurrent fault zone oriented in the general direction NNW-SSE. The structure developed as a result of late movements of the Campo do Meio Shear Belt during the Brasilian Orogenic Cycle. The Cássia Fault Zone is recorded through a range of deformed rocks varying in width ranging from 0.5 to 3.0 km, composed of milonitic rocks, characterized by ductile deformation in metamorphic conditions of green schist facies (chlorite zone). The discontinuity was reactivated as a normal fault zone, with a lower block to the southwest (geometric reactivation) during the Neocretaceous, correlated with the Soerguimento do Alto Paranaíba. The tectonic reactivation was marked by intense breccia, cataclase and the formation of two sets of normal faults with arrangement in stepped blocks progressively lowered to the west. The microstructural features and alteration reactions observed together with the occurrence of pseudotaquilite allowed us to infer that these fault rocks were developed at depths lower than 11 km, with temperatures lower than 300 ° C, probably associated with earthquakes. A second stage of reactivation is recorded through the formation of quaternary sedimentary deposits in the regions of Cássia-Pratápolis and Desemboque. These are correlative fault deposits related to the movement of the Cássia Fault Zone as a normal fault zone, with a lower block to the southwest, forming a kinematic reactivation. Locally, the sedimen... (Complete abstract click electronic access below)
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Sartori, José Eduardo [UNESP}. "Reativação de falhas: o caso da Zona de Falha de Cássia/MG". Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/152953.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A Zona de Falha de Cássia corresponde a uma zona de falha transcorrente sinistral oblíqua orientada segundo a direção geral NNW-SSE. A estrutura se desenvolveu em decorrência de movimentações tardias do Cinturão de Cisalhamento Campo do Meio durante o Ciclo Orogênico Brasiliano. A Zona de Falha de Cássia está registrada através de uma faixa de rochas deformadas de largura variável entre 0,5 a 3,0 km, composta por rochas miloníticas, caracterizadas por deformação dúctil-rúptil em condições metamórficas de fácies xisto verde, zona da clorita. A descontinuidade foi reativada como uma zona de falha normal, com bloco baixo a sudoeste (reativação geométrica) durante o Neocretáceo, correlacionada com o Soerguimento do Alto Paranaíba. A reativação tectônica foi marcada por intensa brechação, cataclase e a formação de dois conjuntos de falhas normais com arranjo em blocos escalonados progressivamente rebaixados para oeste. As feições microestruturais e reações de alteração constatadas, juntamente com a ocorrência de pseudotaquilito permitiram inferir que estas rochas de falha foram desenvolvidas em profundidades inferiores a 11 km, com temperaturas menores que 300°C, provavelmente associadas a sismos. Uma segunda etapa de reativação está registrada através da formação de depósitos sedimentares argilosos e arenosos quaternários, respectivamente nas regiões de Cássia-Pratápolis e Desemboque. Tratam-se de depósitos correlativos de falha relacionados à movimentação da Zona de Falha de Cássia como uma zona de falha normal, com bloco baixo a sudoeste, configurando uma reativação cinemática. Localmente os sedimentos exibem feições de deformação rúptil como falhas, fraturas e zonas brechadas, indicando atividade neotectônica na região. Este rico acervo de produtos geológicos transforma a Zona de Falha de Cássia em modelo para estudos de reativação tectônica em ambiente intraplaca e evolução de longo termo.
The Cássia Fault Zone corresponds to an oblique sinistral transcurrent fault zone oriented in the general direction NNW-SSE. The structure developed as a result of late movements of the Campo do Meio Shear Belt during the Brasilian Orogenic Cycle. The Cássia Fault Zone is recorded through a range of deformed rocks varying in width ranging from 0.5 to 3.0 km, composed of milonitic rocks, characterized by ductile deformation in metamorphic conditions of green schist facies (chlorite zone). The discontinuity was reactivated as a normal fault zone, with a lower block to the southwest (geometric reactivation) during the Neocretaceous, correlated with the Soerguimento do Alto Paranaíba. The tectonic reactivation was marked by intense breccia, cataclase and the formation of two sets of normal faults with arrangement in stepped blocks progressively lowered to the west. The microstructural features and alteration reactions observed together with the occurrence of pseudotaquilite allowed us to infer that these fault rocks were developed at depths lower than 11 km, with temperatures lower than 300 ° C, probably associated with earthquakes. A second stage of reactivation is recorded through the formation of quaternary sedimentary deposits in the regions of Cássia-Pratápolis and Desemboque. These are correlative fault deposits related to the movement of the Cássia Fault Zone as a normal fault zone, with a lower block to the southwest, forming a kinematic reactivation. Locally, the sediments exhibit features of deformation such as faults, fractures and breccias, indicating neotectonic activity in the region. This rich collection of geological products transforms the Cássia Fault Zone into a model for studies of tectonic reactivation in intraplate environment and long term evolution.
CNPq: 165801/2014-0
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Libros sobre el tema "Zonal structures"

1

Pliego, Susana Casarín. Pátzcuaro: Zona de monumentos históricos. México, D.F: Instituto Nacional de Antropología e Historia, 2014.

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Toporek, Isaac. Cuautla: Zona de monumentos históricos. México, D.F: Instituto Nacional de Antropología e Historia, 2013.

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Vajzović, Dervo. Stanovništvo Mostara 1879-1991: Demogeografska studia : općina, grad, gradska regija, prigradska zona. Mostar: Dervo Vajzović, 2005.

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I, Romanova E. y Kupt͡s︡ov A. G, eds. Podzemnai͡a︡ okhrannai͡a︡ zona istoricheskoĭ territorii Ri͡a︡zanskogo Kremli͡a︡. Ri͡a︡zanʹ: Stilʹ, 1995.

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Pliego, Susana Casarín y Marcela Landgrave. Parras de la Fuente: Zona de monumentos históricos. México, Ciudad de México: Instituto Nacional de Antropología e Historia, 2016.

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Sarà, Guido. Costruzioni in zona sismica: Imparare a progettare dai terremoti. [Palermo, Italy]: D. Flaccovio, 2014.

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Ermini, Letizia Pani. Il Battistero e la zona episcopale di Pisa nell'Alto Medioevo. Ospedaletto, Pisa: Pacini, 1985.

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Nunes, Denise Vianna. Edifícios residenciais de Firmino Saldanha: Morar moderno na Zona Sul do Rio de Janeiro. Rio de Janeiro: UFRJ, 2009.

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Ayuntamiento, Salamanca (Spain) y Instituto del Territorio y Urbanismo (Spain), eds. Salamanca: Plan especial de protección y reforma interior del recinto universitario y zona histórico-artística. Madrid: Centro de Publicaciones, MOPU, 1987.

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Coloquio de Historia y Medio Físico. (1st 1989 Almería, Spain). El agua en zonas áridas, arqueología e historia: Actas del I Coloquio de Historia y Medio Físico, Almería, 14-15-16 de diciembre de 1989. [Almería]: Instituto de Estudios Almerienses de la Diputación de Almería, 1989.

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Capítulos de libros sobre el tema "Zonal structures"

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Shagalov, S. V. y G. V. Rybushkina. "Nonlinear Development of Unstable Modes and Formation of Coherent Vortex Structures in Weakly Supercritical Zonal Shear Flows". En Progress in Turbulence V, 189–94. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-01860-7_30.

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Prasad, Sarvamangala V., Gautam Kaul y Bonnie S. Dunbar. "Structure and Function of Mammalian Zonae Pellucidae". En Introduction to Mammalian Reproduction, 203–25. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4615-0273-9_12.

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Liu, Luo-Qin. "Far-Field Asymptotics and Zonal Structure of Theoretical Flow Models". En Unified Theoretical Foundations of Lift and Drag in Viscous and Compressible External Flows, 29–58. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-6223-0_2.

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Simpson, John I., Johannes Van der Steen y Joep Tan. "Eye Movements and the Zonal Structure of the Rabbit Flocculus". En The Cerebellum Revisited, 255–66. New York, NY: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4612-2840-0_13.

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Phillips, David M. "Structure and Function of the Zona Pellucida". En Ultrastructure of the Ovary, 63–72. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3944-5_4.

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Dunbar, Bonnie S., S. V. Prasad y T. M. Timmons. "Comparative Structure and Function of Mammalian Zonae Pellucidae". En A Comparative Overview of Mammalian Fertilization, 97–114. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4757-8982-9_6.

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Scott, R. K. "The structure of zonal jets in shallow water turbulence on the sphere". En IUTAM Symposium on Turbulence in the Atmosphere and Oceans, 243–52. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-94-007-0360-5_20.

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Siddiqui, Arif y Catherine A. Wilson. "Serotoninergic Neurones in the Zona Incerta Exerts Inhibitory Control on Gonadotrophin Release via 5-HT2A/2C Receptors". En Protein Structure — Function Relationship, 213–21. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0359-6_22.

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Fung, J. C. H., J. C. R. Hunt, R. J. Perkins, A. A. Wray y D. Stretch. "Defining the Zonal Structure of Turbulence Using the Pressure and Invariants of the Deformation Tensor". En Advances in Turbulence 3, 395–404. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84399-0_43.

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Bakas, Nikolaos A. y Petros J. Ioannou. "Emergence of Nonzonal Coherent Structures". En Zonal Jets, 419–34. Cambridge University Press, 2019. http://dx.doi.org/10.1017/9781107358225.027.

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Actas de conferencias sobre el tema "Zonal structures"

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Jiaying, Wang, Lu Chunguang, Deng Lan y Xie Danyu. "Research on Intelligent Interactive Regulation Framework Based on Hierarchical and Zonal Structure Supporting Large-scale New Adjustable Load Resources". En 2024 China International Conference on Electricity Distribution (CICED), 793–801. IEEE, 2024. http://dx.doi.org/10.1109/ciced63421.2024.10753935.

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Jovanović, D., P. K. Shukla, Bengt Eliasson y Padma K. Shukla. "Structures and Zonal Flows in Magnetized Plasmas". En NEW FRONTIERS IN ADVANCED PLASMA PHYSICS. AIP, 2010. http://dx.doi.org/10.1063/1.3533182.

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DEWAR, ROBERT L. y R. F. ABDULLATIF. "ZONAL FLOW GENERATION BY MODULATIONAL INSTABILITY". En Proceedings of the COSNet/CSIRO Workshop on Turbulence and Coherent Structures in Fluids, Plasmas and Nonlinear Media. WORLD SCIENTIFIC, 2007. http://dx.doi.org/10.1142/9789812771025_0017.

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Rotaru, Vasile K., Igor V. Dementiev, Oleg Y. Korshak, Sevastian Neamtsu, Stephan V. Robu, Hossin A. Abdeldayem, Igor V. Ciapurin y Nickolai V. Kukhtarev. "Photothermoplastic films as recorders in observation systems of zonal structures". En Defense and Security, editado por Robert D. Habbit, Jr. y Peter Tchoryk, Jr. SPIE, 2004. http://dx.doi.org/10.1117/12.543759.

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Krommes, John A., A. Sen, S. Sharma y P. N. Guzdar. "Advances and Current Challenges in the Theory of Zonal-Flow Generation". En INTERNATIONAL SYMPOSIUM ON WAVES, COHERENT STRUCTURES AND TURBULENCE IN PLASMAS. AIP, 2010. http://dx.doi.org/10.1063/1.3526158.

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Chen, Y. Lisa y Jin Wen. "Application of zonal model on indoor air sensor network design". En The 14th International Symposium on: Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, editado por Masayoshi Tomizuka, Chung-Bang Yun y Victor Giurgiutiu. SPIE, 2007. http://dx.doi.org/10.1117/12.716356.

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Jiang, Wei-wu, Xiao-wei Gao y Bing-bing Xu. "Zonal Free Element Method And Its Application In Functionally Graded Pieozelectric Structures". En 2020 15th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA). IEEE, 2021. http://dx.doi.org/10.1109/spawda51471.2021.9445482.

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Shivamoggi, Bhimsen K. "Geophysical localized structures induced by non-uniform β and/or zonal shear flow". En The workshop on two-dimensional turbulence in plasmas and fluids. AIP, 1997. http://dx.doi.org/10.1063/1.54434.

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Bezuglov, Dmitry A., Marina Yu Zvezdina, Larissa V. Cherckesova, George N. Shalamov, Nikolay N. Prokopenko, Julia A. Shokova, Gennady P. Sinyavsky, Boris A. Akishin y Vitaly M. Porksheyan. "Possibilities of nonlinear parametric zonal systems application on the base of passive magnetophotonic structures at low temperatures". En 2017 IEEE East-West Design & Test Symposium (EWDTS). IEEE, 2017. http://dx.doi.org/10.1109/ewdts.2017.8110158.

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Sotnikov, V. I., O. G. Onishchenko, E. Yasin, J. Kindel y J. N. Leboeuf. "Large-scale zonal structures and short scale spectra generated by drift flute waves in high-beta hed plasmas". En 2009 IEEE 36th International Conference on Plasma Science (ICOPS). IEEE, 2009. http://dx.doi.org/10.1109/plasma.2009.5227485.

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Informes sobre el tema "Zonal structures"

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Real Fernández, Elena. ¿PUEDE HABER 5 FASES DE DEFORMACIÓN HERCÍNICA EN LA ZONA DE VALDEMORILLO (MADRID)? Ilustre Colegio Oficial de Geólogos, octubre de 2020. http://dx.doi.org/10.21028/erf.2020.10.27.

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Resumen
This work aims to understand the processes that have taken part in the deformation, both on a small and large scale, of metamorphic materials in Valdemorillo area, located in the west of the Community of Madrid and within the Spanish Central System. The objective is to understand the kinematic evolution and the specific mechanical behaviour of igneous-metamorphic materials from the area, deformed by certain efforts developed throughout the Hercynian Orogeny. Therefore, a structural analysis has been carried out throughout a geological mapping scaled 1: 25000 and the analysis of various petrographic studies by microscope. Thus, a total of 5 different deformations have been identified, which have allowed us to better understand the reconstruction of the processes generated in these materials and that we see today.
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