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Dissertations / Theses on the topic 'Locally coherent'

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Published: 11 March 2023

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1

Martini, Lorenzo. "Local coherence of hearts in the derived category of a commutative ring." Doctoral thesis, Università degli studi di Trento, 2022. http://hdl.handle.net/11572/354322.

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Approximation theory is a fundamental tool in order to study the representation theory of a ring R. Roughly speaking, it consists in determining suitable additive or abelian subcategories of the whole module category Mod-R with nice enough functorial properties. For example, torsion theory is a well suited incarnation of approximation theory. Of course, such an idea has been generalised to the additive setting itself, so that both Mod-R and other interesting categories related with R may be linked functorially. By the seminal work of Beilinson, Bernstein and Deligne (1982), the derived categor
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2

Kurdthongmee, Wattanapong. "Coherence in CSG image generation." Thesis, Brunel University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389260.

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Griffin, Robert A. "Coherent optical matched filtering for application in photonic code-division multiple access communication networks." Thesis, University of Kent, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240135.

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4

Barrow-Williams, Nick. "Proximity coherence for chip-multiprocessors." Thesis, University of Cambridge, 2011. https://www.repository.cam.ac.uk/handle/1810/241042.

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Many-core architectures provide an efficient way of harnessing the growing numbers of transistors available in modern fabrication processes; however, the parallel programs run on these platforms are increasingly limited by the energy and latency costs of communication. Existing designs provide a functional communication layer but do not necessarily implement the most efficient solution for chip-multiprocessors, placing limits on the performance of these complex systems. In an era of increasingly power limited silicon design, efficiency is now a primary concern that motivates designers to look
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Carvalho, Ariane Cristina Ramello de. "Avaliação de coerência local e inferência por meio do Local Coherence Inference Test traduzido para a língua portuguesa." Universidade Presbiteriana Mackenzie, 2014. http://tede.mackenzie.br/jspui/handle/tede/1625.

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Made available in DSpace on 2016-03-15T19:40:15Z (GMT). No. of bitstreams: 1 Ariane Cristina Ramello de Carvalho.pdf: 542187 bytes, checksum: b329ccdc42149aed0374b8fe13c088c7 (MD5) Previous issue date: 2014-02-04<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Given the scarcity of well-validated instruments in Brazil capable of measuring local coherence ability in children-found the need to undertake a study to quantitatively reveal the performance of linguistic processing, in respect of local coherence in a population of normal children of the network mainstream education
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Shi, Xinxiang. "Diplomatic immunities ratione materiae under the Vienna Convention on Diplomatic Relations : towards a coherent interpretation." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/33152.

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Rules of diplomatic immunity, which nowadays are enshrined in the Vienna Convention on Diplomatic Relations, play an important role in interstate diplomacy because they ensure the efficient performance of diplomatic functions. This thesis investigates a particular form of diplomatic immunity - diplomatic immunity ratione materiae. Unlike diplomatic immunity ratione personae, which pertains to the personal status of a diplomatic agent, diplomatic immunity ratione materiae depends in essence on the official nature of a particular act In practice, however, the determination of diplomatic immunity
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Lopes, Kim Samejima Mascarenhas. "Directed wavelet covariance for locally stationary processes." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/45/45133/tde-14032018-174950/.

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The main goal of this study is to propose a methodology that measures directed relations between locally stationary processes. Unlike stationary processes, locally stationary processes may present sudden pattern changes and have local characteristics in specific intervals. This behavior causes instability in measures based on Fourier transforms. The relevance of this study relies on considering these processes and propose robust methodologies that are not affected by outliers, sudden pattern changes or local behavior. We start reviewing the Partial Directed Coherence (PDC) and the Wavelet Coh
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O'Toole, Barbara Maria. "Differentiation and coherence in urban policy : the impact of locality on Urban Development Corporations." Thesis, University of Newcastle Upon Tyne, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241556.

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9

Mesgar, Mohsen [Verfasser], and Michael [Akademischer Betreuer] Strube. "Graph-based Patterns for Local Coherence Modeling / Mohsen Mesgar ; Betreuer: Michael Strube." Heidelberg : Universitätsbibliothek Heidelberg, 2020. http://d-nb.info/1209273721/34.

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10

Magnuson, Matthew Evan. "Effects of severing the corpus callosum on coherent electrical and hemodynamic interhemispheric oscillations intrinsic to functional brain networks." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47681.

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Large scale functional brain networks, defined by synchronized spontaneous oscillations between spatially distinct anatomical regions, are essential to brain function and have been implicated in disease states, cognitive capacity, and many sensing and motor processes. In this work, we sever the corpus callosum in the rodent model to determine if structural connectivity (specifically the primary interhemispheric pathway) organizes and influences bilateral functional connectivity and brain-wide spatiotemporal dynamic activity patterns. Prior to the callosotomy work, resting state brain network
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11

Turquin, Emeline. "Imagerie tissulaire ultrasonore 3D pour l’étude de l’anisotropie locale du muscle cardiaque." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1213/document.

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L’imagerie échographique a connu un fort développement ces dernières années. Elle possède une cadence d’imagerie allant jusqu’à plusieurs milliers d’images par secondes notamment avec l’émergence des méthodes dites ultrarapides. Il s’agit donc de la modalité la plus adaptée pour des applications cardiaques permettant non seulement la reconstruction d’images mais également l’extraction de paramètres pour la caractérisation tissulaire, comme l’anisotropie locale présente dans le cœur. En effet, cet arrangement fibreux peut être modifié dans le cas de pathologies cardiaques. L’objectif de ce trav
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12

Lott, Geoffrey Adam 1980. "Probing local conformation and dynamics of molecular complexes using phase-selective fluorescence correlation and coherence spectroscopy." Thesis, University of Oregon, 2010. http://hdl.handle.net/1794/10914.

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xv, 177 p. : ill. (some col.) A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number.<br>When two or more fluorescent chromophores are closely spaced in a macromolecular complex, dipolar coupling leads to delocalization of the excited states, forming excitons. The relative transition frequencies and magnitudes are sensitive to conformation, which can then be studied with optical spectroscopy. Non-invasive fluorescence spectroscopy techniques are useful tools for the study of dilute concentrations of such naturally fluores
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13

Wallin, Dan. "Methods for Creating and Exploiting Data Locality." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Universitetsbiblioteket [distributör], 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6837.

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14

Arvidsson, Jennie. "Lokalt integrerade grupper - Ett specialpedagogiskt alterrnativ." Thesis, Malmö högskola, Fakulteten för lärande och samhälle (LS), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-34365.

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Title: Locally Integrated Groups – A special education alternativeAuthor: Jennie ArvidssonType of essay: Exam essay, second level (15 credits)Supervisor: Barbro Bruce, Examiner: Lisbeth OhlssonProgram: Special Education Program at Malmö Högskola, SwedenDate: 2012-01-12Present study is an attempt to describe how staff perceive their working operations in seven locally integrated groups, for pupils in special educational needs. By submitting a questionnaire to all professions within the groups I have tried to find similarities and differences in their statements from both structured and unstruct
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Barannik, Vlad, Y. Babenko, S. Shulgin, and M. Parkhomenko. "Video encoding to increase video availability in telecommunication systems." Thesis, Taras Shevchenko National University of Kyiv, 2020. https://openarchive.nure.ua/handle/document/16582.

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Article shows presence of the imbalance caused by insufficient level of productivity of modern and perspective information communication technologies concerning information intensity of bit streams. It is described how imbalance level reducing can be formed as a result of increasing of information processing technologies efficiency and that JPEG platform is the basic concept for construction of technologies of compression representation. Therefore it is proposed to provide further development of video processing methods using individual components of the JPEG platform for improving the integri
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Concha, Bañados Soledad. "Local coherence in academic writing: an exploration of Chilean 12th grade Spanish monolingual students' metalinguistic knowledge, writing process, and writing products." Thesis, Boston University, 2007. https://hdl.handle.net/2144/31960.

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Thesis (Ed.D.)--Boston University<br>This study focused on 12th grade Chilean students' ability to produce locally coherent academic texts and on the cognitive basis that underlies this ability. Participants were Chilean students from the city of Santiago, who attended urban public schools, belonged to a low socioeconomic group, and had obtained average scores on the national literacy assessment (SIMCE). All the students in the study wrote argumentative texts in response to a writing prompt and answered a test of recognition of incoherent sequences. A sub sample wrote a second argumentative te
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Müller-Feldmeth, Daniel Georg [Verfasser], and Lars [Akademischer Betreuer] Konieczny. "Sentences in sentences : : modeling frequency effects in local syntactic coherence processing = Sätze in Sätzen : Modellierung von Frequenzeffekten bei der Verarbeitung lokaler syntaktischer Kohärenz." Freiburg : Universität, 2014. http://d-nb.info/1123482322/34.

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18

Dias, Márcio de Souza. "Investigação de modelos de coerência local para sumários multidocumento." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-11112016-084734/.

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A sumarização multidocumento consiste na tarefa de produzir automaticamente um único sumário a partir de um conjunto de textos derivados de um mesmo assunto. É imprescindível que seja feito o tratamento de fenômenos que ocorrem neste cenário, tais como: (i) a redundância, a complementaridade e a contradição de informações; (ii) a uniformização de estilos de escrita; (iii) tratamento de expressões referenciais; (iv) a manutenção de focos e perspectivas diferentes nos textos; (v) e a ordenação temporal das informações no sumário. O tratamento de tais fenômenos contribui significativamente para q
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19

Marten, Tobias. "Ab-initio study of disorder broadening of core photoemission spectra in random metallic alloys." Thesis, Linköping University, The Department of Physics, Chemistry and Biology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2580.

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<p>Ab-initio results of the core-level shift and the distribution about the average for the 3<i>d</i><sub>5/2</sub> electrons of Ag, Pd and 2<i>p</i><sub>3/2</sub> of Cu are presented for the face-centered-cubic AgPd and CuPd random alloys. The complete screening model, which includes both initial and final states effects in the same scheme, has been used in the investigations. </p><p>The alloys have been modeled with a supercell containing 256 atoms. Density-functional theory calculations are carried out using the locally self consistent Green's function approach. </p><p>Results from the calc
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20

Li, Junhong Li. "Pier Streamlining as a Bridge Local Scour Countermeasure and the Underlying Scour Mechanism." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1518565785864439.

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21

Bressan, Filippo. "Large Eddy Simulation of turbulence around a scoured Bridge Abutment." Doctoral thesis, Università degli studi di Trieste, 2010. http://hdl.handle.net/10077/3511.

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2008/2009<br>In this work the turbulent field developing in case of local erosion around a 45° wing-wall bridge abutment was investigated numerically. Three different scour conditions were considered: beginning of the process, logarithmic phase and equilibrium stage. The flow field was computed using a wall-resolving large eddy simulation (a simulation where the near-wall viscous sub-layer is directly resolved) and the bathymetric data were taken from physical experiments with an equivalent geometry. The dynamics of the coherent structures forming around the obstacle and inside the scour-hole
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22

Utkutug, Deniz. "A Parametric Study Investigating The Inertial Soil-structure Interaction Effects On Global And Local Deformation Demands Of Multistory Steel Mrf Structures Resting On Surface Rigid Mat Foundations." Phd thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12610490/index.pdf.

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In reality, dynamic response of a structure supported on a compliant soil may vary significantly from the response of same structure when supported on a rigid base. A parametric study is conducted for the analysis of the variation in the global and the local deformation demands caused by the inertial soil-structure interaction effects. For the purposes of the study, nonlinear dynamic analyses are performed on 7 steel moment-resisting frame models, which are prepared by the virtue of fixed-base and flexible-base (interacting) conditions. Foundation is modeled with the Truncated Cone Model (Wolf
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23

Vaumourin, Gregory. "Gestion hétérogène des données dans les hiérarchies mémoires pour l’optimisation énergétique des architectures multi-coeurs." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0173/document.

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Les problématiques de consommation dans la hiérarchie mémoire sont très présentes dans les architectures actuelles que ce soit pour les systèmes embarqués limités par leurs batteries ou pour les supercalculateurs limités par leurs enveloppes thermiques. Introduire une information de classification dans le système mémoire permet une gestion hétérogène, adaptée à chaque type particulier de données. Nous nous sommes intéressé dans cette thèse plus précisément aux données en lecture seule et étudions les possibilités d’une gestion spécifique dans la hiérarchie mémoire à travers un codesign compila
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Supe, Kristin Edwards. "Role of Rat Neuronal Oscillations in Acquisition and Disruption of Working Memory with Acute Ethanol." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1404732893.

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25

Bozorg, Magham Amir Ebrahim. "Atmospheric Lagrangian transport structures and their applications to aerobiology." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/56482.

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Exploring the concepts of long range aerial transport of microorganisms is the main motivation of this study. For this purpose we use theories and concepts of dynamical systems in the context of geophysical fluid systems. We apply powerful notions such as finite-time Lyapunov exponent (FTLE) and the associated Lagrangian coherent structures (LCS) and we attempt to provide mathematical explanations and frameworks for some applied questions which are based on realistic concerns of atmospheric transport phenomena. Accordingly, we quantify the accuracy of prediction of FTLE-LCS features and we det
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26

Vallgren, Andreas. "Dynamic properties of two-dimensional and quasi-geostrophic turbulence." Doctoral thesis, KTH, Mekanik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-25712.

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Two codes have been developed and implemented for use on massively parallelsuper computers to simulate two-dimensional and quasi-geostrophic turbulence.The codes have been found to scale well with increasing resolution and width ofthe simulations. This has allowed for the highest resolution simulations of twodimensionaland quasi-geostrophic turbulence so far reported in the literature.The direct numerical simulations have focused on the statistical characteristicsof turbulent cascades of energy and enstrophy, the role of coherent vorticesand departures from universal scaling laws, theoretized
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Aktas, Djeylan. "Photonique quantique expérimentale : cohérence, non localité et cryptographie." Thesis, Université Côte d'Azur (ComUE), 2016. http://www.theses.fr/2016AZUR4142.

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Cette thèse s'articule autour de l'étude de la cohérence de la lumière produite à partir de sources de paires de photons intriqués et de micro-lasers. Nous avons produit et manipulé des états photoniques intriqués, et conduit des investigations à la fois fondamentales et appliquées. Les deux études menées sur les aspects fondamentaux de la non localité avaient pour but de relaxer partiellement deux contraintes sur lesquelles s'appuie l'inégalité de Bell standard en vue d'applications à la cryptographie quantique. Ainsi, en collaboration avec l'Université de Genève, nous avons redéfini la notio
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Massoud, Mouhannad. "Experimental characterization of heat transfer in nanostructured silicon-based materials." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI063/document.

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Ce mémoire de thèse aborde la caractérisation expérimentale du transfert thermique à l’échelle nanométrique dans des matériaux compatibles avec les procédés de la micro-électronique. Pour cela deux techniques de caractérisation sont appliquées chacune à deux différents systèmes, le silicium mésoporeux irradié et les membranes de silicium suspendues. La première technique de caractérisation est la thermométrie micro-Raman. La puissance du laser chauffe l'échantillon exposé. La détermination de la conductivité thermique nécessite la modélisation de la source de chaleur par la méthode des élément
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Danna, Charlotte. "Le principe de solidarité écologique." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE2070.

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Adopté par l’article 2 de la loi n°2016-1087 de reconquête de la biodiversité, de la nature et des paysages du 8 aout 2016, le principe de solidarité écologique appelle « à prendre en compte, dans toute prise de décision publique ayant une incidence notable sur l’environnement des territoires concernés, les interactions des écosystèmes, des êtres vivants et des milieux naturels ou aménagés ». Ce principe général du droit de l’environnement inscrit à l’article L110-1 du code de l’environnement est destiné à conserver les interactions écosystémiques et les processus écologiques ainsi qu’à amélio
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Thompson, Garth John. "Neural basis and behavioral effects of dynamic resting state functional magnetic resonance imaging as defined by sliding window correlation and quasi-periodic patterns." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49083.

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While task-based functional magnetic resonance imaging (fMRI) has helped us understand the functional role of many regions in the human brain, many diseases and complex behaviors defy explanation. Alternatively, if no task is performed, the fMRI signal between distant, anatomically connected, brain regions is similar over time. These correlations in “resting state” fMRI have been strongly linked to behavior and disease. Previous work primarily calculated correlation in entire fMRI runs of six minutes or more, making understanding the neural underpinnings of these fluctuations difficult. Recent
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Der, Ralf, and Darragh Smyth. "Local online learning of coherent information." 1998. https://ul.qucosa.de/id/qucosa%3A32448.

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One of the goals of perception is to learn to respond to coherence across space, time and modality. Here we present an abstract framework for the local online unsupervised learning of this coherent information using multi-stream neural networks. The processing units distinguish between feedforward inputs projected from the environment and the lateral, contextual inputs projected from the processing units of other streams. The contextual inputs are used to guide learning towards coherent cross-stream structure. The goal of all the learning algorithms described is to maximize the predictability
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Isaac, Rejoy. "High resolution optical coherent-channel analyzer using balanced-coherent detection and temperature-tuned DFB laser as local oscillator." Thesis, 2010. http://hdl.handle.net/1828/3292.

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The rapid increase in demand for bandwidth in optical networks over the last two decades has led to the development of wavelength division multiplexing where multiple channels are transmitted simultaneously at different wavelengths over a single optical-fiber to maximize the usage of the bandwidth available in fiber. Increasing demand for bandwidth has led to narrower channel spacing and the use of advanced modulation schemes that are more spectrally efficient than traditional on-off keying techniques [1]. Nonlinearities and dispersion effects in fiber accumulate over a long distance and can a
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33

Darnell, Ervan. "Cache coherence using local knowledge." Thesis, 1997. http://hdl.handle.net/1911/19146.

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Hiding memory latency is critical in modern machines. Typically, machines have used cache and addressed the ensuing cache coherence problem with hardware or VM-based strategies that rely on global inter-cache communication. However, global communication limits scalability. "Local knowledge" coherence strategies, which use compile-time information to avoid run-time global communication, offer better scalability, but suffer additional cache misses. We develop a framework for understanding the relation of coherence strategies, previous and newly proposed. Within this framework, it is possible to
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CHEN, HONG-MING, and 陳弘明. "The local coherence of ray-tracing algorithms." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/67021478386931407847.

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35

Hassen, Rania Khairy Mohammed. "Local Phase Coherence Measurement for Image Analysis and Processing." Thesis, 2013. http://hdl.handle.net/10012/7450.

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The ability of humans to perceive significant pattern and structure of an image is something which humans take for granted. We can recognize objects and patterns independent of changes in image contrast and illumination. In the past decades, it has been widely recognized in both biology and computer vision that phase contains critical information in characterizing the structures in images. Despite the importance of local phase information and its significant success in many computer vision and image processing applications, the coherence behavior of local phases at scale-space is not well und
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陳俊霖. "A Locality-Aware Set-Level Capacity Sharing and Efficient Coherence Maintenance Mechanism." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/48840143667306384616.

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37

Heinloth, Jochen [Verfasser]. "Coherent sheaves with parabolic structure and construction of Hecke eigensheaves for some ramified local systems / vorgelegt von Jochen Heinloth." 2003. http://d-nb.info/968382177/34.

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38

Jänicke, Heike, Alexander Wiebel, Gerik Scheuermann, and Wolfgang Kollmann. "Multifield visualization using local statistical complexity." 2007. https://ul.qucosa.de/id/qucosa%3A33063.

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Modern unsteady (multi-)field visualizations require an effective reduction of the data to be displayed. From a huge amount of information the most informative parts have to be extracted. Instead of the fuzzy application dependent notion of feature, a new approach based on information theoretic concepts is introduced in this paper to detect important regions. This is accomplished by extending the concept of local statistical complexity from finite state cellular automata to discretized (multi-)fields. Thus, informative parts of the data can be highlighted in an application-independent, purely
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Olu-Lafe, Olufemi. "Cognitive processing of global and local visual stimuli in autism spectrum disorder." Thesis, 2013. https://hdl.handle.net/2144/14114.

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An ongoing debate is whether people with autism spectrum disorder (ASD) have a local processing bias and to what extent impaired contextual processing is associated with this bias. The set of experiments employed in this project examined global and local processing, shifts between global and local processing, and low- and high-level visual processing in an attempt to address this issue. This thesis tested the hypotheses that (1) a local processing bias is associated with impaired global processing in ASD individuals, and (2) atypical processing style is linked with ASD severity. Twenty ASD
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McGinn, Ryan J. "Dynamic Linkage Between Local Cross-frequency Coupling and Communication Through Coherence in an in Vitro Model of Human Neocortical Oscillatory Activity." Thesis, 2013. http://hdl.handle.net/1807/43223.

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The dynamical underpinnings of complex computation and information transmission within the brain, while of great interest to the neuroscience community at large, remain poorly understood. One of the striking manifestations of neuronal population activity is that of rhythmic oscillations in the local field potential. It is thought that distinct patterns of these oscillations such as cross-frequency coupling within a given spatial location and coherence between disparate brain regions may represent neuronal computation and communication, respectively. Here we show such dynamics within a human te
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"Global and local processing of hierarchical patterns in high-functioning autistic children: a test of weak central coherence theory." 1999. http://library.cuhk.edu.hk/record=b5890077.

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Chui Yuk Lan.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 1999.<br>Includes bibliographical references (leaves 81-84).<br>Abstracts in English and Chinese.<br>ABSTRACT(ENGLISH AND CHINESE VERSION) --- p.ii<br>ACKNOWLEDGEMENTS --- p.iv<br>TABLE OF CONTENTS --- p.v<br>LIST OF TABLES --- p.viii<br>LIST OF FIGURES --- p.xi<br>LIST OF APPENDICES --- p.xiii<br>Chapter CHAPTER I - --- INTRODUCTION --- p.1<br>Weak Central Coherence Theory --- p.1<br>Superior Spatial Hypothesis --- p.4<br>Superior Segmentation Hypothesis --- p.4<br>Global Precedence Hypothesis --- p.5<br>Perceptual
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Gupta, Sunil K. "Nature of Local Interactions at cisPro-Aro Peptide Sequences in Proteins : Evidences for van der Waals type Interactions. Design and Synthesis of Novel Covalent Surrogates for the Peptide Hydrogen Bond." Thesis, 2016. http://etd.iisc.ernet.in/handle/2005/2859.

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This thesis titled, “Nature of Local Interactions at cisPro-Aro Peptide Sequences in Proteins: Evidences for van der Waals type Interactions. Design and Synthesis of Novel Covalent Surrogates for the Peptide Hydrogen Bond”, describes two important studies. The first is to gain a thorough understanding of the nature of interactions that govern cisPro stability at Pro-Aro sequences, which described in the first four chapters. The final chapter describes the synthesis of novel 4-carbon covalent surrogates for the peptide H-bonding interaction. Chapter 1: Local Interactions Governing cisPro Stabi
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Krishnan, Sunder Ram. "Optimum Savitzky-Golay Filtering for Signal Estimation." Thesis, 2013. http://hdl.handle.net/2005/3293.

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Motivated by the classic works of Charles M. Stein, we focus on developing risk-estimation frameworks for denoising problems in both one-and two-dimensions. We assume a standard additive noise model, and formulate the denoising problem as one of estimating the underlying clean signal from noisy measurements by minimizing a risk corresponding to a chosen loss function. Our goal is to incorporate perceptually-motivated loss functions wherever applicable, as in the case of speech enhancement, with the squared error loss being considered for the other scenarios. Since the true risks are observed t
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