Détail de l'auteur
Auteur Sami Ryad Zouzou |
Documents disponibles écrits par cet auteur (7)
Affiner la recherche Interroger des sources externesApproximation B.K.W aux ordres supérieurs et applications physiques d'une nouvelle borne inférieur pour les systèmes à quatre corps / Barkat Bouaouina
Titre : Approximation B.K.W aux ordres supérieurs et applications physiques d'une nouvelle borne inférieur pour les systèmes à quatre corps Type de document : texte imprimé Auteurs : Barkat Bouaouina ; Univ. de Constantine, Éditeur scientifique ; Sami Ryad Zouzou, Directeur de thèse Année de publication : 1999 Importance : 127 f. Format : 30 cm Note générale : 1 Disponible dans la salle de recherche
2 Disponibles au magasin de la bibliothèque centraleLangues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Borne Système à quatre corps Approximation B.K.W Index. décimale : 530 Physique Permalink : index.php?lvl=notice_display&id=2941 Approximation B.K.W aux ordres supérieurs et applications physiques d'une nouvelle borne inférieur pour les systèmes à quatre corps [texte imprimé] / Barkat Bouaouina ; Univ. de Constantine, Éditeur scientifique ; Sami Ryad Zouzou, Directeur de thèse . - 1999 . - 127 f. ; 30 cm.
1 Disponible dans la salle de recherche
2 Disponibles au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Borne Système à quatre corps Approximation B.K.W Index. décimale : 530 Physique Permalink : index.php?lvl=notice_display&id=2941 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/3313 BOU/3313 Thèse Bibliothèque principale Thèses Disponible
Titre : Déflexion de la lumiére et temps de retard à l'échelle cosmologique : Génération et interprétation de solutions stationnaires en théorie d'Einstein-Maxwell. Type de document : texte imprimé Auteurs : Mourad Guenouche, Auteur ; Sami Ryad Zouzou, Directeur de thèse Mention d'édition : 10/10/2019 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2019 Importance : 241 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : physique: Physique Théorique Relativité générale cosmologie déflexion de la lumière temps de retard constante cosmologique équations d'Einstein-Maxwell groupe SU(2, 1) transformation finie de Geroch charge NUT corde de Misner wormhole courbes fermées de genre temps causalité General relativity cosmology light bending time delay cosmological constant Einstein-Maxwell equations SU(2, 1) group finite Geroch transformation NUT parameter Misner string closed time-like curves, causality النسبية العامة الكوسمولوجيا انحراف الضوء مدة التأخر الثابت الكوسمولوجي معادلات أينشتاين-ماكسويل مجموعة ( SU)2,1تحويل Gerochالمنتهي شحنة نوت وتر ميسنر وورمهول المنحنيات الزمنية المغلقة مبدأ السببية Index. décimale : 530 Physique Résumé :
The research work carried out in this doctoral thesis covers two separate topics. In the Örst topic, we have investigated strong gravitational lensing by a spherically symmetric mass distribution in the framework of two di§erent cosmological models with a positive cosmological constant: The static Kottler (or Schwarzschild-de Sitter) model and the dynamic EinsteinStraus model in the case of áat space (null curvature) and closed space (positive curvature).
The Einstein-Straus model consists of a Kottler vacuole embedded in an expanding FriedmanLemaÓtre-Robertson-Walker Universe. The deáection of light and the time delay have been computed in each model then applied to the lensed quasar SDSS J1004+4112. Unlike the case of Kottler model, the analysis of the deáection of light and time delay in both cases of áat and closed Einstein-Straus model have produced results which are in agreement with Rindler and Ishakís claim that a positive cosmological constant attenuates the bending of light. On the other hand, it has been revealed, in the case of closed Einstein-Straus model, that the light bending and time delay decrease considerably as the present scale factor a0 becomes smaller than a limit value about 9:1 1026 m (k0 ' 0:02) highlighting the potential impact of spatial positive curvature. This goes against the Einstein-Straus model in which case the results remain the same regardless of which value is chosen for the present scale factor. Nevertheless, above this limit value ( k0 < 0:02), the obtained results are found to be indistinguishable from the áat case. The second topic revolves around two parts. In the Örst part, we have generalized the generation method of rotating solutions by combining a Önite SU(2; 1) transformations with a Önite coordinate transformation (Önite Geroch transformation). This work seems to show that this generalization would only be apparent. In the second part, a number of problems associated with the Reissner-Nordstrˆm-NUT solution have been explored. We have analyzed
in detail the geodesic motion and shown, without assuming time periodicity to make Misner strings unobservable, that the Reissner-Nordstrˆm-NUT spacetime is geodesically complete. Another unpleasant feature of spacetimes with NUTs is the presence of regions containing closed time-like curves. We have shown that among them there are no closed timelike or null geodesics, so the freely falling observers should not encounter causality violations. Considering the motion of electrically charged test particles in the massless magnetically
charged Reissner-Nordstrˆm-NUT solution, we Önd that no wordline followed by an initially distant charged particle moving under the action of the Lorentz force can possibly close or self-intersect.
Note de contenu :
Annexes.Diplôme : Doctorat en sciences En ligne : ../theses/physique/GUE7560.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11398 Déflexion de la lumiére et temps de retard à l'échelle cosmologique : Génération et interprétation de solutions stationnaires en théorie d'Einstein-Maxwell. [texte imprimé] / Mourad Guenouche, Auteur ; Sami Ryad Zouzou, Directeur de thèse . - 10/10/2019 . - جامعة الإخوة منتوري قسنطينة, 2019 . - 241 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : physique: Physique Théorique Relativité générale cosmologie déflexion de la lumière temps de retard constante cosmologique équations d'Einstein-Maxwell groupe SU(2, 1) transformation finie de Geroch charge NUT corde de Misner wormhole courbes fermées de genre temps causalité General relativity cosmology light bending time delay cosmological constant Einstein-Maxwell equations SU(2, 1) group finite Geroch transformation NUT parameter Misner string closed time-like curves, causality النسبية العامة الكوسمولوجيا انحراف الضوء مدة التأخر الثابت الكوسمولوجي معادلات أينشتاين-ماكسويل مجموعة ( SU)2,1تحويل Gerochالمنتهي شحنة نوت وتر ميسنر وورمهول المنحنيات الزمنية المغلقة مبدأ السببية Index. décimale : 530 Physique Résumé :
The research work carried out in this doctoral thesis covers two separate topics. In the Örst topic, we have investigated strong gravitational lensing by a spherically symmetric mass distribution in the framework of two di§erent cosmological models with a positive cosmological constant: The static Kottler (or Schwarzschild-de Sitter) model and the dynamic EinsteinStraus model in the case of áat space (null curvature) and closed space (positive curvature).
The Einstein-Straus model consists of a Kottler vacuole embedded in an expanding FriedmanLemaÓtre-Robertson-Walker Universe. The deáection of light and the time delay have been computed in each model then applied to the lensed quasar SDSS J1004+4112. Unlike the case of Kottler model, the analysis of the deáection of light and time delay in both cases of áat and closed Einstein-Straus model have produced results which are in agreement with Rindler and Ishakís claim that a positive cosmological constant attenuates the bending of light. On the other hand, it has been revealed, in the case of closed Einstein-Straus model, that the light bending and time delay decrease considerably as the present scale factor a0 becomes smaller than a limit value about 9:1 1026 m (k0 ' 0:02) highlighting the potential impact of spatial positive curvature. This goes against the Einstein-Straus model in which case the results remain the same regardless of which value is chosen for the present scale factor. Nevertheless, above this limit value ( k0 < 0:02), the obtained results are found to be indistinguishable from the áat case. The second topic revolves around two parts. In the Örst part, we have generalized the generation method of rotating solutions by combining a Önite SU(2; 1) transformations with a Önite coordinate transformation (Önite Geroch transformation). This work seems to show that this generalization would only be apparent. In the second part, a number of problems associated with the Reissner-Nordstrˆm-NUT solution have been explored. We have analyzed
in detail the geodesic motion and shown, without assuming time periodicity to make Misner strings unobservable, that the Reissner-Nordstrˆm-NUT spacetime is geodesically complete. Another unpleasant feature of spacetimes with NUTs is the presence of regions containing closed time-like curves. We have shown that among them there are no closed timelike or null geodesics, so the freely falling observers should not encounter causality violations. Considering the motion of electrically charged test particles in the massless magnetically
charged Reissner-Nordstrˆm-NUT solution, we Önd that no wordline followed by an initially distant charged particle moving under the action of the Lorentz force can possibly close or self-intersect.
Note de contenu :
Annexes.Diplôme : Doctorat en sciences En ligne : ../theses/physique/GUE7560.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11398 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité GUE/7560 GUE/7560 Thèse Bibliothèque principale Thèses Disponible 
Titre : Étude de quelques modèles cosmologiques dans le cadre de la théorie Einstein-Cartan. Type de document : texte imprimé Auteurs : Abdelghani Hadjh Hammou, Auteur ; Sami Ryad Zouzou, Directeur de thèse Mention d'édition : 08/07/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 96 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : physique: Physique Théorique théorie Einstein-Cartan cosmologie torsion loi de Gauss faible matière noire déflexion de la lumière modèle d’Einstein-Strauss Einstein-Cartan theory cosmology weak Gauss law dark matter deflection of light Einstein-Strauss model نظرية أينشتاين-كارتان الكوسملوجيا إنفتال الزمكان قانون غوس الضعيف المادة المظلمة إنحناء الضوءة نموذج آينشتاين-شتراوس Index. décimale : 530 Physique Résumé :
In this thesis, we have studied a few cosmological models in the framework of the Einstein-Cartan theory, that is to say, by including another geometric properties of space-time which is the torsion . We first treated the Kottler spherical symmetric static model in the case of a ompletely antisymmetric Cartan tensor. In addition to being the only case with physical significance, it allows autoparalleles to coincide with geodesics. Using the covariant non-conservation equation, a feature that differentiates the Einstein-Cartan theory from general relativity, it has been shown that the weak Gauss law is no longer true. This mechanism allowed us to hypothesize that torsion could be an alterative to dark matter. It was then shown that the effect of this torsion could dominate that of the cosmological constant in the phenomenon of the deflection of light by a gravitational lens. Another model of interest in this thesis is that of Einstein-Strauss, which connects Kottler’s metric inside the Schücking sphere to the Robertson-Walker metric outside the Schücking sphere. this. Taking into account the spacetime twist generated by the material distribution, we have encountered a mass problem which proves to be variable in this case, which represents a violation of the principle of mass conservation.
Note de contenu :
Annexes.Diplôme : Doctorat En ligne : ../theses/physique/HAD7628.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11464 Étude de quelques modèles cosmologiques dans le cadre de la théorie Einstein-Cartan. [texte imprimé] / Abdelghani Hadjh Hammou, Auteur ; Sami Ryad Zouzou, Directeur de thèse . - 08/07/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 96 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : physique: Physique Théorique théorie Einstein-Cartan cosmologie torsion loi de Gauss faible matière noire déflexion de la lumière modèle d’Einstein-Strauss Einstein-Cartan theory cosmology weak Gauss law dark matter deflection of light Einstein-Strauss model نظرية أينشتاين-كارتان الكوسملوجيا إنفتال الزمكان قانون غوس الضعيف المادة المظلمة إنحناء الضوءة نموذج آينشتاين-شتراوس Index. décimale : 530 Physique Résumé :
In this thesis, we have studied a few cosmological models in the framework of the Einstein-Cartan theory, that is to say, by including another geometric properties of space-time which is the torsion . We first treated the Kottler spherical symmetric static model in the case of a ompletely antisymmetric Cartan tensor. In addition to being the only case with physical significance, it allows autoparalleles to coincide with geodesics. Using the covariant non-conservation equation, a feature that differentiates the Einstein-Cartan theory from general relativity, it has been shown that the weak Gauss law is no longer true. This mechanism allowed us to hypothesize that torsion could be an alterative to dark matter. It was then shown that the effect of this torsion could dominate that of the cosmological constant in the phenomenon of the deflection of light by a gravitational lens. Another model of interest in this thesis is that of Einstein-Strauss, which connects Kottler’s metric inside the Schücking sphere to the Robertson-Walker metric outside the Schücking sphere. this. Taking into account the spacetime twist generated by the material distribution, we have encountered a mass problem which proves to be variable in this case, which represents a violation of the principle of mass conservation.
Note de contenu :
Annexes.Diplôme : Doctorat En ligne : ../theses/physique/HAD7628.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11464 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité HAD/7628 HAD/7628 Thèse Bibliothèque principale Thèses Disponible
Titre : Géométrie non commutative et interactions fondamentales Type de document : texte imprimé Auteurs : Noureddine Zaimen ; Univ. de Constantine, Éditeur scientifique ; Sami Ryad Zouzou, Directeur de thèse Année de publication : 1999 Importance : 183 f. Note générale : 1 Disponible à la salle de recherche
2 Disponibles au magasin de la bibliothèque centraleLangues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Géométrie non commutative Modèle standard Triplet spectral Modèle electrofaible Bosons de jauge Boson de Higgs Relation de masse Index. décimale : 530 Physique Permalink : index.php?lvl=notice_display&id=3004 Géométrie non commutative et interactions fondamentales [texte imprimé] / Noureddine Zaimen ; Univ. de Constantine, Éditeur scientifique ; Sami Ryad Zouzou, Directeur de thèse . - 1999 . - 183 f.
1 Disponible à la salle de recherche
2 Disponibles au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Géométrie non commutative Modèle standard Triplet spectral Modèle electrofaible Bosons de jauge Boson de Higgs Relation de masse Index. décimale : 530 Physique Permalink : index.php?lvl=notice_display&id=3004 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ZAI/3291 ZAI/3291 Thèse Bibliothèque principale Thèses Disponible
Titre : A Propos de Quelques Métriques dans le Cadre de la Relativité Générale Type de document : texte imprimé Auteurs : Meriem Abdelaziz, Auteur ; Sami Ryad Zouzou, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 71 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : "Relativité Générale, cosmologie, métrique, méthode de Killing, symétrie sphérique,
principe cosmologique, constante cosmologique, tenseur d’énergie-impulsion."
"General relativity, cosmology, metric, Killing method, spherical symmetry,
cosmological principle, the cosmological constant , energy-momentum tensor ."
النسبية العامة،الكسمولوجيا،المترية،طريقة Killing ،تناظر كروي، المبدأ الكسمولوجي،الثابت الكسمولوجي، تنسور الطاقة ،اندفاعIndex. décimale : 530 Physique Résumé : "The work of this Magister’s memory is in the framework of the General Theory of
Relativity of Einstein. After a short introduction, followed by a concise but complete
presentation of general relativity in order to dispense the reader to refer to an external
document support, we tackled the rederivation of some interesting metrics of General
Relativity , especially in the field of cosmology . We considered in turn:
The FLRW metric, satisfying the cosmological principle , that is to say corresponding
to a homogeneous isotropic universe, which is reflected by the invariance under
rotations and translations (flat case ), or under rotations and quasi-translations
(spherical and pseudo- spherical cases) .
Shwarzshild metric, static and spherically symmetric , that is to say invariant under
temporal translations and rotation, in absence of cosmological constant .
The Kottler metric or Schwarzshild -de Sitter, also static and spherically symmetric,
but with cosmological constant
The work is done in two steps:
In a first step and for each considered case , we impose the corresponding symmetries.
The method used is that of the Killing vectors , which is an elegant and rigorous
method to implement symmetries . Symmetries result in constraints on the form of
the metric. During this first stage we do not appeal to Einstein's equations , that is to
say we do not use dynamics .
In a second step , having determined in the previous step the most general form of a
metric satisfying some symmetries, we complete determnation of the metric by
tacking into account the Einstein equations.To this end, we have conjectured some
more or less justified forms for the energy-momentum tensor. In this way, we find
the FLRW metric, the Shwarzshild metric inside and outside of the distribution of
matter, and also Kottler metric inside and outside of the distribution of matter."
Diplôme : Magistère En ligne : ../theses/physique/ABD6497.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9618 A Propos de Quelques Métriques dans le Cadre de la Relativité Générale [texte imprimé] / Meriem Abdelaziz, Auteur ; Sami Ryad Zouzou, Directeur de thèse . - constantine [Algérie] : Université Constantine 1, 2014 . - 71 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : "Relativité Générale, cosmologie, métrique, méthode de Killing, symétrie sphérique,
principe cosmologique, constante cosmologique, tenseur d’énergie-impulsion."
"General relativity, cosmology, metric, Killing method, spherical symmetry,
cosmological principle, the cosmological constant , energy-momentum tensor ."
النسبية العامة،الكسمولوجيا،المترية،طريقة Killing ،تناظر كروي، المبدأ الكسمولوجي،الثابت الكسمولوجي، تنسور الطاقة ،اندفاعIndex. décimale : 530 Physique Résumé : "The work of this Magister’s memory is in the framework of the General Theory of
Relativity of Einstein. After a short introduction, followed by a concise but complete
presentation of general relativity in order to dispense the reader to refer to an external
document support, we tackled the rederivation of some interesting metrics of General
Relativity , especially in the field of cosmology . We considered in turn:
The FLRW metric, satisfying the cosmological principle , that is to say corresponding
to a homogeneous isotropic universe, which is reflected by the invariance under
rotations and translations (flat case ), or under rotations and quasi-translations
(spherical and pseudo- spherical cases) .
Shwarzshild metric, static and spherically symmetric , that is to say invariant under
temporal translations and rotation, in absence of cosmological constant .
The Kottler metric or Schwarzshild -de Sitter, also static and spherically symmetric,
but with cosmological constant
The work is done in two steps:
In a first step and for each considered case , we impose the corresponding symmetries.
The method used is that of the Killing vectors , which is an elegant and rigorous
method to implement symmetries . Symmetries result in constraints on the form of
the metric. During this first stage we do not appeal to Einstein's equations , that is to
say we do not use dynamics .
In a second step , having determined in the previous step the most general form of a
metric satisfying some symmetries, we complete determnation of the metric by
tacking into account the Einstein equations.To this end, we have conjectured some
more or less justified forms for the energy-momentum tensor. In this way, we find
the FLRW metric, the Shwarzshild metric inside and outside of the distribution of
matter, and also Kottler metric inside and outside of the distribution of matter."
Diplôme : Magistère En ligne : ../theses/physique/ABD6497.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9618 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ABD/6497 ABD/6497 Thèse Bibliothèque principale Thèses Disponible Permalink
Permalink
