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Dissertations / Theses on the topic 'Nucleus and periphery of a field'

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Published: 3 June 2025

Last updated: 19 July 2025

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1

Nuñez, Lautaro. "Complex Formative Settlements in the Central-South Andes: When the Periphery became the Nucleus." Pontificia Universidad Católica del Perú, 2012. http://repositorio.pucp.edu.pe/index/handle/123456789/113341.

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In this paper we discuss the diffusionist implications derived from centre-periphery relationships and the establishment of dependency links between western valley and circunpuna societies within the nuclear zone of the central and southern highlands during the Early and Middle Formative periods in northern Chile (1500 BC up to AD 400). By analyzing two complex settlements, Tulán-54 (located 3000 meters above sea level) and Caserones-1 (900 meters above sea level), we have observed that there has been an over-interpretation of foreign contributions in explaining the rise of sedentism that is a

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2

Webb, Ben Sebastian. "Extra-classical receptive field mechanisms in the lateral geniculate nucleus." Thesis, University of Nottingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275162.

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3

Williams, David. "The functional significance of oscillatory local field potential activity in the Parkinsonian subthalamic nucleus." Thesis, University College London (University of London), 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419980.

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4

Filandri, Elena. "Effective field theory description of α cluster nuclei: The 9 Be ground state and 9 Be photodisintegration". Doctoral thesis, Università degli studi di Trento, 2022. http://hdl.handle.net/11572/338316.

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In this Thesis we present a description of α cluster nuclei, in particular focusing on the case of 9 Be, with αn and αα interactions derived from Cluster Effective Field Theory (EFT). The two-body potentials are regularized by a Gaussian cutoff which cures the short-distance dependence of the interaction and the potential parameters are found comparing the effective range expansion (ERE) with the calculated T-matrix. The calculation of the ground-state energies is carried out by diagonalizing the Hamiltonian on a Non symmetryzed Hyperspherical Harmonics basis in momentum space. Using only two

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5

Maniglia, Marcello. "Perceptual Learning of Lateral Interactions in the near-periphery of the visual field: New Perspectives for patients with Macular Degeneration." Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3423059.

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One way in which peripheral vision may acquire the functional role of the fovea, a part of the retina preferentially used for complex visual tasks (such as reading and face recognition) is by modulating the strength of intracortical connections in the humans’ visual areas with perceptual learning. Perceptual learning is a practice-dependent improvement in a visual task performance that can persist for several months, and is specific for stimulus, task, eye presentation and retinal locus of stimulation. These specificity effects have been explained on the basis of neural plasticity, consisting

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6

Tran, Thanh Thuy. "Lattice model for amyloid peptides : OPEP force field parametrization and applications to the nucleus size of Alzheimer's peptides." Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC187/document.

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La maladie d’Alzheimer touche plus de 40 millions de personnes dans le monde et résulte de l’agrégation du peptide beta-amyloïde de 40/42 résidus. En dépit de nombreuses études expérimentales et théoriques, le mécanisme de formation des fibres et des plaques n’est pas élucidé, et les structures des espèces les plus toxiques restent à déterminer. Dans cette thèse, je me suis intéressée à deux aspects. (1) La détermination du noyau de nucléation (N*) de deux fragments (Aβ)16-22 et (Aβ)37-42. Mon approche consiste à déterminer les paramètres OPEP du dimère (Aβ)16-22 en comparant des simulations M

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7

Robertazzi, Federica. "Real-time rejection of movement-related artifacts in subthalamic nucleus local field potential recordings during adaptive Deep Brain Stimulation." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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La stimolazione cerebrale profonda (DBS) è una tecnica utilizzata in clinica per trattare alcune patologie come la malattia di Parkinson (PD) tramite un rilascio locale di corrente alternata ad alta frequenza (> 100 Hz), grazie all’utilizzo di elettrodi impiantati nei gangli della base durante una procedura di chirurgia stereotassica. Negli ultimi anni indagini neurofisiologiche svolte con la DBS hanno inoltre consentito la scoperta di potenziali marcatori neurali caratteristici del PD e il loro utilizzo per una stimolazione definita adattativa (aDBS) in cui l’ampiezza dello stimolo in tension

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8

Klos, Philipp [Verfasser], Achim [Akademischer Betreuer] Schwenk, and Hans-Werner [Akademischer Betreuer] Hammer. "Few-neutron systems and WIMP-nucleus interactions from chiral effective field theory / Philipp Klos ; Achim Schwenk, Hans-Werner Hammer." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2018. http://d-nb.info/1171426429/34.

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9

Rissman, Tracey Alayne Seinfeld John H. "Theory, field measurements, and laboratory experiments concerning the cloud condensation nucleus properties of organic and/or insoluble aerosol components /." Diss., Pasadena, Calif. : Caltech, 2006. http://resolver.caltech.edu/CaltechETD:etd-05262006-115411.

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10

Ahmady, Phoulady Hady. "Adaptive Region-Based Approaches for Cellular Segmentation of Bright-Field Microscopy Images." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6794.

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Microscopy image processing is an emerging and quickly growing field in medical imaging research area. Recent advancements in technology including higher computation power, larger and cheaper storage modules, and more efficient and faster data acquisition devices such as whole-slide imaging scanners contributed to the recent microscopy image processing research advancement. Most of the methods in this research area either focus on automatically process images and make it easier for pathologists to direct their focus on the important regions in the image, or they aim to

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11

Kaati, Patrik. "Small-Scale Farmers Land Use and Socioeconomic Situation in the Mount Elgon District in Northwestern Kenya : A Minor Field Study - Combined Field Mapping and Interview." Thesis, Högskolan Dalarna, Geografi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:du-10161.

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This Minor Field Study was carried out during November and December in 2011 in the Mount Elgon District in Western Kenya. The objective was to examine nine small-scale farming household´s land use and socioeconomic situation when they have joined a non-governmental organization (NGO) project, which specifically targets small-scale farming households to improve land use system and socioeconomic situation by the extension of soil and water conservation measures. The survey has worked along three integral examinations methods which are mapping and processing data using GIS, semi structured interv

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12

Aravamuthan, Bhooma Rajagopalan. "Comparing the radiological anatomy, electrophysiology, and behavioral roles of the pedunculopontine and subthalamic nuclei in the normal and parkinsonian brain." Thesis, University of Oxford, 2008. http://ora.ox.ac.uk/objects/uuid:9a735b39-c1fe-4d5f-b05f-3385f27e6e58.

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Deep brain stimulation (DBS) of the subthalamic nucleus (STN) and DBS of the pedunculopontine nucleus (PPN) have been shown to be effective surgical therapies for Parkinson’s disease (PD). To better understand the PPN and STN as DBS targets for PD, this research compares the anatomy, electrophysiology, and motor control roles of these nuclei. PPN and STN connections were examined in vivo in human subjects and in the non-human primate using probabilistic diffusion tractography. Both the PPN and STN were connected with each other and with the motor cortex (M1) and basal ganglia. After studying t

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13

Mutschler, Aurélie. "Le noyau-bulle de 34Si : Un outil expérimental pour étudier l’interaction spin-orbite ?" Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112157/document.

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L’interaction spin-orbite a permis de reproduire dans les modèles nucléaires théoriques, les nombres magiques N=28 et 50 observés dans les noyaux atomiques. Ces dernières décennies, l’étude expérimentale de noyaux exotiques a mis en évidence une évolution des nombres magiques loin de la vallée de stabilité. On peut alors se poser la question de l’évolution des potentiels d’interaction eux-mêmes, et en particulier de l’interaction spin-orbite. Si cette interaction a été historiquement incluse « à la main » dans les modèles de champ moyen « classiques », elle émerge cependant naturellement dans

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14

Лазуткіна, Ю. А. "Лексико-семантичне поле зорової діяльності в українській та англійській мовах". Thesis, Сумський державний університет, 2020. https://essuir.sumdu.edu.ua/handle/123456789/77214.

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Дана робота присвячена визначенню поняття лексико-семантичного поля, встановленню його структури, комплексному дослідженню поля, зокрема у семантичному, парадигматичному та структурному аспектах.<br>Данная работа посвящена определению понятия лексико-семантического поля, установлению его структуры, комплексному исследованию поля в семантическом, парадигматическом и структурном аспектах.<br>The paper deals with the determination of the structure of the lexical-semantic field, its complex study, particularly in the semantic, paradigmatic and structural aspects.

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15

Benis, Damien. "Rôle du noyau subthalamique dans les fonctions exécutives chez le patient Parkinsonien." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENS016/document.

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Par sa connectivité directe avec le cortex, le noyau subthalamique (NST) représente une des structures d'entrée du système des ganglions de la base, et se trouve impliqué dans différents aspects du comportement (contrôle moteur, cognitif et limbique). Néanmoins, les corrélats électrophysiologiques de ces processus restent débattus. Les études effectuées dans le cadre de cette thèse visent à éclaircir le rôle possible du NST dans trois fonctions exécutives, à savoir l'inhibition réactive (suppression d'un mouvement programmé), l'inhibition proactive (préparation à inhiber son mouvement) et l'at

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16

Liang, Haozhao. "Nuclear charge-exchange excitations in a self-consistent covariant approach." Paris 11, 2010. http://www.theses.fr/2010PA112178.

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Les excitations d'échange de charge dans les noyaux constituent l'un des sujets importants et actuels en physique nucléaire et en astrophysique. En principe, une connaissance systématique de l'évolution du comportement de ces excitations à travers la table des éléments fournirait des informations directes sur les propriétés en spin et isospin de l'interaction entre nucléons dans le milieu nucléaire, et sur l'équation d'état de la matière nucléaire. Par ailleurs, une quantité d'importance essentielle pour la structure des noyaux, l'épaisseur de la peau de neutrons, peut être déterminée par la r

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17

Lambrecq, Virginie. "Corrélats neuronaux de l’incertitude. Aspects psychophysiologiques et physiopathologiques." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0344/document.

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L’incertitude est un processus cognitif communément expérimenté lors d’une prise de décision. Dansle trouble obsessionnel-compulsif (TOC), il est excessif et compromet les capacités décisionnelles del'individu.Ce travail avait comme objectif une meilleure compréhension des aspects physiologiques etphysiopathologiques de l’incertitude, au travers d'une double approche, comportementale etélectrophysiologique. Dans un premier temps, nous avons construit une tâche originale qui permetd'exprimer son incertitude au cours d'une prise de décision. Avec cette "tâche d’incertitude", nousavons exploré le

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18

Roberts, Anthea Elizabeth. "Is International Law International?" Phd thesis, Canberra, ACT : The Australian National University, 2017. http://hdl.handle.net/1885/124611.

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International lawyers are familiar with the question: “Is international law law?” But this thesis instead asks the question: “Is international law international?” Using a variety of methods, this work sheds light on some of the ways in which international law as a transnational legal field is constructed by international law academics, and is conceptualized in international law textbooks, in the five permanent members of the Security Council: the People’s Republic of China, the French Republic, the Russian Federation, the United Kingdom of Great Bri

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19

Klos, Philipp. "Few-neutron systems and WIMP-nucleus interactions from chiral effective field theory." Phd thesis, 2018. http://tuprints.ulb.tu-darmstadt.de/8156/1/Klos_Thesis_Final.pdf.

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The building blocks of atomic nuclei, protons and neutrons, interact via the strong force. The fundamental theory of the strong interaction, quantum chromodynamics (QCD), is non-perturbative at the energy scales relevant for nuclear physics. Calculations of low-energy observables based directly on QCD thus present a challenge. Effective field theories (EFTs) of QCD, such as chiral EFT, provide an alternative pathway to describe the nuclear force and the interaction of nuclei with external particles. In this thesis, chiral EFT is applied to studies of few-neutron systems as well as in calculati

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20

Sundaram, Arun N. E. "Saccade Related Gamma Potentials Recorded in Human Subthalamic Nucleus, Globus Pallidus Interna and Ventrointermediate Nucleus of the Thalamus." Thesis, 2012. http://hdl.handle.net/1807/33702.

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Gamma oscillations of local field potentials (LFP) in the basal ganglia and thalamus had not been studied during saccades. Eleven patients were studied during deep brain stimulation (DBS); 6 were in the subthalamic nucleus (STN); 3 in the globus pallidus interna (GPi); and 2 in the thalamic ventralis intermedius nucleus (Vim). Patients performed horizontal saccades to visual targets while LFPs from DBS electrodes, scalp electroencephalogram (EEG), and electrooculogram (EOG) were recorded. Wavelet spectrograms were generated and saccade onset and event-related gamma synchronizations (ERS) we

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21

Cardoso, Inês Catarina Prego. "Exploring the role of subthalamic nucleus local field potentials recordings in Parkinson´s disease deep brain stimulation." Master's thesis, 2021. http://hdl.handle.net/10451/52188.

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Trabalho Final do Curso de Mestrado Integrado em Medicina, Faculdade de Medicina, Universidade de Lisboa, 2021<br>Contextualização: Os Local Field Potentials (LFPs) permitem a medição da atividade neuroelétrica do núcleo subtalâmico (NST) e constituem promissores biomarcadores de parkinsonismo na doença de Parkinson (DP). Atividades voluntárias podem interferir com o grau de parkinsonismo. O registo de LFPs constitui uma oportunidade para investigar a influência de tarefas voluntárias sobre a atividade neuroelétrica do NST e sobre o funcionamento de sistemas de estimulação cerebral profunda (D

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22

Rissman, Tracey Alayne. "Theory, Field Measurements, and Laboratory Experiments Concerning the Cloud Condensation Nucleus Properties of Organic and/or Insoluble Aerosol Components." Thesis, 2006. https://thesis.library.caltech.edu/2107/1/T_Rissman_PhD_Thesis.pdf.

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Predicting how the future climate of Earth will change as a result of increasing human emissions is one of the greatest problems facing science today. The earth’s climate is the result of a delicate balance between incoming and outgoing radiation. Anthropogenic emissions of aerosol particles into the atmosphere have the potential to affect the earth’s climate in significant ways through both direct and indirect effects on the earth’s radiative balance. One of the largest uncertainties in aerosol radiative forcing is associated with the relationship between atmospheric aerosols and cloud forma

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23

Котелевець, Анна Олександрівна. "Лексико-семантичне поле «продукти харчування в сучасній англійській мові»". Магістерська робота, 2021. https://dspace.znu.edu.ua/jspui/handle/12345/5470.

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Котелевець А. О. Лексико-семантичне поле «продукти харчування в сучасній англійській мові» : кваліфікаційна робота магістра спеціальності 035 "Філологія" / наук. керівник О. В. Шевчук. Запоріжжя : ЗНУ, 2021. 54 с.<br>EN : The work is presented on 54 pages of printed text. The list of references includes 89 sources.The present paper is dedicated to the analysis of the lexical-semantic field "Food" structure in modern English. The object of the research is the peculiarities of the lexical and semantic field "food" in modern English. The purpose of the research is to establish the peculiar feat

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24

Basu, Debaleena. "Neural Mechanisms underlying the planning of sequential saccades." Thesis, 2018. https://etd.iisc.ac.in/handle/2005/4076.

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Saccades are rapid eye movements that we continually make (about 2-3 times per second) to look around and scan our visual environment. Though we effortlessly execute saccadic eye movements all the time, they are not just reflexive movements; saccades have been shown to involve multifaceted cognitive control mechanisms. This property of saccades, combined with the fact that saccadic parameters are easily measurable, and that the neural circuitry for saccade generation is fairly well established, has established saccadic eye movements to be an excellent tool to study motor planning and decision-

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25

Lee, Esther. "Reversal of Morphine-induced Locomotion in M5 Muscarinic Receptor Knockout Mice with Food Deprivation but not Bilateral Infusions of VTA BDNF." Thesis, 2010. http://hdl.handle.net/1807/25752.

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Cholinergic inputs from mesopontine tegmentum activate midbrain dopamine (DA) neurons via M5 muscarinic receptors. The M5 receptor is important for mesopontine stimulation-induced accumbal or striatal DA efflux, brain stimulation reward or morphine-induced conditioned place preference (CPP). M5 receptor knockout (KO) mice show 40-50% less morphine-induced locomotion. Pedunculopontine tegmental nucleus (PPT) lesions in rodents block morphine CPP, but are ineffective after 18 hours food deprivation, opiate dependence, or intra-VTA BDNF. Based on these findings, we investigated whether acute food

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26

Παπαμιχάλης, Βασίλειος. "Χρήση του μοντέλου Izhikevich για προσομοίωση της νευροφυσιολογικής λειτουργίας του υποθαλαμικού πυρήνα με βάση δυναμικά τοπικού πεδίου". Thesis, 2010. http://nemertes.lis.upatras.gr/jspui/handle/10889/3955.

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Στην παρούσα εργασία μελετάμε τη μοντελοποίηση του υποθαλαμικού πυρήνα των βασικών γαγγλίων με χρήση του μαθηματικού νευρωνικού μοντέλου Izhikevich. Βάση της μελέτης μας αποτελούν μικροηλεκτροδιακές καταγραφές, που έχουν ληφθεί κατά τη διάρκεια νευροχειρουργικών επεμβάσεων εν τω βάθει εγκεφαλικής διέγερσης, για τη συμπτωματική θεραπεία της νόσου Πάρκινσον. Θα ξεκινήσουμε με μια εισαγωγή στην φυσιολογία του νευρικού κυττάρου και στην ανατομία των βασικών γαγγλίων. Θα αναλύσουμε τα βασικά ποιοτικά μοντέλα που ερμηνεύουν τη συμμετοχή των τελευταίων σε κινητικές διεργασίες, αλλά και την εμπλοκ

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27

Passia, Radoslav. "Estetika okraja a hranice (K vybraným aspektom fenoménov okraja a hranice v slovenskej literatúre 20. storočia v stredoeurópskom kontexte)." Doctoral thesis, 2012. http://www.nusl.cz/ntk/nusl-326900.

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Radoslav P a s s i a Aesthetics of Periphery and Border (To Selected Aspects of Periphery and Border Phenomenon in Slovak Literature of the 20th Century in Central European Context) Abstract The dissertation deals with selected aspects of periphery and border phenomenon in Slovak literature of the 20th century in Central European context. In the preliminary chapter Border the author focuses particularly on selected texts by Central European writers which are thematically set in the Eastern Carpathians. This radically multiethnic region is considered to be one of the relatively independent cult

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Challagundla, Malleswari. "AAV-based gene therapy for axonal regeneration in a rat model of rubrospinal tract lesion." Doctoral thesis, 2014. http://hdl.handle.net/11858/00-1735-0000-0022-5FC6-9.

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