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Dissertations / Theses on the topic 'Wide Angle Reflection'

Author: Grafiati

Published: 11 March 2023

Last updated: 31 July 2025

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1

Harsha, Senusi Mohamed. "Interpretation of Southern Georgia coastal plain velocity structure using refraction and wide-angle reflection methods." Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/25886.

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2

Hananto, Nugroho. "Architecture and Evolution of North Sumatra Subduction Zone based on long Offset Seismic Reflection and Wide Angle Seismic Refraction / Reflection Data." Institut de physique du globe (Paris), 2011. http://www.theses.fr/2011GLOB1203.

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3

Oueity, Jounada. "Near-vertical and wide-angle seismic reflection studies of the Moho and sub-crustal lithosphere in NW Canada." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/28903.

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High quality, coincident near-vertical incidence (NVI) and refraction/wide-angle seismic reflection data (R/WAR) acquired along a profile in the Northwest Territories are used to study the nature of the Moho and subcrustal reflectors. First, we re-examine distinct subhorizontal reflections on NVI data in the uppermost mantle that were interpreted previously as a separate feature from a relict subducted slab. Using forward and inverse traveltime modeling of both data sets along the crooked line, we investigate the origin of the reflections. Our results demonstrate that the subhorizontal reflect

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4

Hughes, Stephen. "Crustal structure of northeastern North America : results from the Ontario-New York-New England seismic refraction/wide-angle reflection experiment." Thesis, University of Leicester, 1992. http://hdl.handle.net/2381/35043.

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The Ontario-New York-New England seismic refraction/wide-angle reflection profile was acquired to investigate the deep structural interrelationships between the southeastern Grenville province and the western New England Appalachians. The Grenville province is characterized by 45 km thick crust, with an average crustal seismic velocity of 6.6 km/s and a Poisson's ratio of 0.28+0.01. In the mid-crust a laminated dome-like body is inferred to be composed of mafic cumulate sills on the basis of its high velocity (7.1 km/s) and Poisson's ratio (0.27). The lower crust is characterized by a velocity

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5

Meléndez, i. Catalán Adrià. "Development of a New Parallel Code for 3-D Joint Refraction and Reflection Travel-Time Tomography of Wide-Angle Seismic Data. Synthetic and Real Data Applications to the Study of Subduction Zones." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/289786.

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This dissertation is devoted to seismic tomography. I have implemented a new modelling tool for 3-D joint refraction and reflection travel-time tomography of wide-angle seismic data (TOMO3D). The reason behind this central objective is the evidence that the information based on 2-D seismic data does not allow to capture the structural complexity of many 3-D targets, and in particular that of the seismogenic zone in subduction margins. The scientific rationale for this statement, which justifies the central part of my thesis work, is based on the analysis of 2-D models obtained in the convergen

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6

Biari, Youssef. "Structure profonde de la marge Nord-Ouest Africaine." Thesis, Brest, 2015. http://www.theses.fr/2015BRES0080/document.

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La marge NE Américaine est une des marges les mieux étudiées au monde, elle a fait l’objet de plusieurs études géophysiques. En comparaison, la marge africaine reste peu étudiée car uniquement deux campagnes océanographiques y ont été menées : la campagne Sismar (2001) au large de la Meseta et la campagne Dakhla (2002) au large du Sahara. La structure profonde de la marge canadienne est connue grâce aux profils de sismique grand-angle SMART-1, 2 et 3. Le premier objectif du projet MIRROR était d’acquérir des profils combinant sismique grand-angle et sismique réflexion sur un segment homologue

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7

Bouyahiaoui, Boualem. "Structure profonde et réactivation de la marge est-algérienne et du bassin adjacent (secteur d'Annaba), contraintes par sismique réflexion multitrace et grand-angle terre-mer." Thesis, Nice, 2014. http://www.theses.fr/2014NICE4116/document.

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Dans ce travail de thèse, nous analysons la structure crustale de la marge est-algérienne et du bassin adjacent (région d’Annaba), à partir d’un ensemble de nouvelles données acquises durant la Campagne SPIRAL’2009 incluant un profil sismique terre-mer de ~240 km de long, des lignes sismiques réflexion pénétrante 360-traces, et des profils gravimétriques et magnétiques. Nous avons par ailleurs disposé pour cette étude de données complémentaires incluant notamment un ensemble de profils de sismique réflexion offrant des résolutions complémentaires. La structure crustale ainsi établie nous perme

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8

Laurencin, Muriel. "Etude de la géométrie, de la nature et des déformations de la zone de subduction des Petites Antilles du Nord." Thesis, Brest, 2017. http://www.theses.fr/2017BRES0096/document.

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Dans les zones de subduction, la géométrie du slab est l'un des paramètres qui contrôle les déformations tectoniques de la marge, le couplage et le potentiel sismogénique. La subduction des Antilles résulte du chevauchement de la plaque Caraïbe vers le NE sur les plaques Amériques, à une vitesse de convergence de 2 cm/an. La sismicité est hétérogène et augmente localement sous la plateforme des Iles Vierges. D’une obliquité croissante vers le nord, cette zone est favorable à un partitionnement dont les déformations sont très peu observées. Ces travaux ont permis de confirmer un substratum d’un

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9

Brancatelli, Giuseppe. "Analisi di dati acquisiti con OBS." Doctoral thesis, Università degli studi di Trieste, 2010. http://hdl.handle.net/10077/3458.

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2008/2009<br>Gli OBS (Ocean Bottom Seismometer) sono ampiamente utilizzati negli studi sismici crostali attraverso l’utilizzo delle registrazioni di onde rifratte e riflesse a grande offset (Wide Angle Reflection/Refraction, WAR/R). L'analisi di questi dati comporta, solitamente, l'impiego di modellistica diretta e/o inversa al fine di giungere alle velocità dei singoli strati e alle profondità delle interfacce. In questa tesi, invece, si presenta un approccio diverso che prevede: 1) costruzione di modelli di velocità dall’analisi dei segnali rifratti; 2) elaborazione dei dati OBS al fine di o

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10

Leprêtre, Angélique. "Contraintes par imagerie sismique pénétrante sur l'évolution d'une marge Cénozoïque réactivée en compression (cas de la marge algérienne, secteur de Tipaza)." Thesis, Brest, 2012. http://www.theses.fr/2012BRES0079/document.

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L'inversion des marges passives apparaît comme le premier stade vers l'initiation de nouvelles zones de subduction. Cette étape cruciale dans la tectonique des plaques soulève néanmoins encore de nombreuses questions. L'étude des marges actuellement réactivées en compression apparaît ainsi comme essentielle pour mieux comprendre ce processus. Ces marges sont peu nombreuses, situées dans des contextes géodynamiques variés, et les facteurs déterminant leur évolution mal contraints. Située au nord de l'Afrique, la marge algérienne fait partie de ces rares exemples potentiels à travers le monde. L

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11

Mihoubi, Abdelhafid. "Imagerie sismique de la structure profonde de la marge Algérienne orientale (secteur de Jijel) : implications en terme de potentiel pétrolier." Thesis, Brest, 2014. http://www.theses.fr/2014BRES0037/document.

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Cette thèse a été conduite dans le cadre du programme de coopération de recherche Algéro-française SPIRAL (Sismique Profonde et Investigations Régionales du Nord de l’Algérie). Ce projet vise à étudier la structure profonde de la marge algérienne par une approche combinée des techniques sismiques ; grand-angle et multi-canal. Le domaine couvert par la présente étude se concentre dans la région de Jijel dans la marge algérienne orientale. L’objectif principal de notre thèse est d'améliorer en profondeur l'imagerie de la marge algérienne en utilisant une combinaison de données sismiques grand-an

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12

Mihoubi, Abdelhafid. "Imagerie sismique de la structure profonde de la marge Algérienne orientale (secteur de Jijel) : implications en terme de potentiel pétrolier." Electronic Thesis or Diss., Brest, 2014. http://www.theses.fr/2014BRES0037.

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Cette thèse a été conduite dans le cadre du programme de coopération de recherche Algéro-française SPIRAL (Sismique Profonde et Investigations Régionales du Nord de l’Algérie). Ce projet vise à étudier la structure profonde de la marge algérienne par une approche combinée des techniques sismiques ; grand-angle et multi-canal. Le domaine couvert par la présente étude se concentre dans la région de Jijel dans la marge algérienne orientale. L’objectif principal de notre thèse est d'améliorer en profondeur l'imagerie de la marge algérienne en utilisant une combinaison de données sismiques grand-an

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13

Chiu, Chi-Kai, and 丘志凱. "The Numerical Study of Ideal Anti-Reflection For Wide Angle Incidence." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/92618453859248113473.

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碩士<br>國立清華大學<br>材料科學工程學系<br>91<br>Researches of AR coating had been studied for a long time, but most of them focused on vertical-incident part. In this paper, we would find out the kind of ideal AR coating which could be used for every incident angle. Based on the characteristic matrix theory, we wrote the computer program to calculate the average reflectance for p- and s-polarization of different AR coating structures on the glass for visible spectral. We designed the ideal AR coating by using of the inhomogeneous structure with refractive index changing from air to substrate. The

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14

HSIEH, WEI-CHIEH, and 謝維傑. "Design and Fabrication of Optical Cut-off Filter for Wide Angle Reflection Mirror." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/76592980213817627314.

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碩士<br>中華大學<br>機械工程學系碩士班<br>100<br>Traditional wide-angle refractive mirror is not transparent for visible light, it is not possible to take photography day or night behind the mirror. This study aims to design reflective cut-off filter for wide angle mirror with day and night photography function. The Essential Macleod software was utilized to design the cut-off filter with day and night photography features. The practical cut-off filter multilayer film was carried out by sputtering and sol-gel processes. The PC (Polycarbonate) was used as the substrate material. The alternated TiO2 and SiO2 d

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15

Khalifa, Mohamed Omran Mohamed. "Wide-angle seismic reflection studies of the Elberton granite and Carolina Terrane, southern Appalachians, northeast Georgia." 2002. http://purl.galileo.usg.edu/uga%5Fetd/khalifa%5Fmohamed%5Fo%5F200208%5Fphd.

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16

Widiyansari, Roma, and 維蒂利. "Body- and Surface-waves Wavefield Inversion in Southern Taiwan: Application to TAIGER T4b Wide Angle Refraction/Reflection Data." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/3x93q2.

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碩士<br>國立中央大學<br>地球科學學系<br>106<br>Surface and body waves generated by near-surface explosions and recorded along T4b line is investigated for imaging subsurface velocity structure in Southern Taiwan. Surface waves propagate only at the Earth’s surface meanwhile body waves propagate deep through the body/interior of the Earth. For crustal-scale velocity structure investigation, wave-field processing and inversion of both body and surface waves records can be very useful to image Earth’s subsurface structures without picking travel-time. Seismic dataset used in this research is a crustal-scale Wi

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17

Hrubcová, Pavla. "Stavba kůry v českém masívu z dat seismických refrakčních experimentů." Doctoral thesis, 2010. http://www.nusl.cz/ntk/nusl-297736.

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The deep structure of the Bohemian Massif, the largest stable outcrop of the Variscan rocks in central Europe, was studied using the data of the international seismic refraction and wide- angle reflection experiments CELEBRATION 2000, ALP 2002 and SUDETES 2003. The data were interpreted by seismic tomographic inversion and by 2-D trial-and-error forward modelling of the P and S waves. Above, additional constraints on the crustal structure were imposed by reflectivity or gravity modelling, and by receiver function interpretation. Knowledge of the crustal velocity structure in the Bohemian Massi

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