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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 74 for “"Minkowski"”.
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On Minkowski Area
Made available in DSpace on 2014-12-05T21:50:07Z (GMT). No. of bitstreams: 1 0023298.pdf: 2358148 bytes, checksum: ddb7c8a5941fe4d427273dd171450a81 (MD5) Previous issue date: 1957
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Extending minkowski norm illuminant estimation
… of the art in this field. We first revisit the Minkowski Family Norm framework for illuminant estimation. Because, of all the simple statistical approaches, it is the most general formulation and, crucially, delivers the best results. This thesis makes four technical contributions. First, we …
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The free particle on q-Minkowski space
… abzubilden. In dieser Arbeit wird der q-Minkowski Raum als ein konkretes Modell solch eines betrachtet. Das besondere dieser q-deformierten Räume ist, daß sie eine so genannte Quantengruppe als Hintergrundsymmetrie besitzen. Dies macht es möglich sich die in der Physik äußerst wichtigen …
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Some convergence properties of Minkowski functionals given by polytopes
1 PDF file (vii, 28 pages)
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Numerical Studies on Recent Improvements of the Minkowski-Hlawka Theorem
Made available in DSpace on 2014-12-05T21:50:22Z (GMT). No. of bitstreams: 1 6206114.pdf: 2540753 bytes, checksum: b32e8fe09d869d383c23ef70134c718a (MD5) Previous issue date: 1962
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Design of fractal minkowski diversity antenna for LTE and WIFI application
… Long Term Evolution (LTE). In this project, the Minkowski fractal Array Diversity antenna is introduced. Fractal geometry allows us to design a miniature antenna and integrate multiple telecommunication services into single device. One of the most relevant trends for wireless devices is …
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Self-similar solutions to the mean curvature flow in Euclidean and Minkowski space
… the mean curvature flow of curves in the Minkowski plane R¹,¹ and give a classification of all the self-similar solutions. In addition, we demonstrate five non-self-similar exact solutions to the flow.
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Εισαγωγή των μαθητών λυκείου στη δισδιάστατη γεωμετρία Minkowski μέσω διδακτικών σεναρίων και νοητικών πειραμάτων
… φτάνοντας σε έναν απλοποιημένο τύπο της μετρικής Minkowski. Στο πρώτο κεφάλαιο σκιαγραφούμε τις αντιλήψεις των μαθητών για τον χώρο, την κίνηση και τις “άχρονες” γεωμετρικές έννοιες. Διατρέχουμε, μέσα από τη διεθνή βιβλιογραφία, χαρακτηριστικές προσπάθειες εκλαΐκευσης των σχετι¬κιστικών ιδεών και …
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Nouveau formalisme mathématique pour la variété de Minkowski: interprétation des vecteurs de genre espace
Nous introduisons dans le premier chapitre le langage de la géométrie différentielle moderne dans le cadre de la relativité restreinte. Ceci nous permettra de traduire en opérateurs différentiels les objets mathématiques que nous allons étudier. Ce langage va être exploité par la suite et dans le …
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Conformal symmetries in special and general relativity.The derivation and interpretation of conformal symmetries and asymptotic conformal symmetries in Minkowski space-time and in some space-times of general relativity.
… Are generalisations of the conformal group of Minkowski space-time we devote Chapters 3 and 4 to a study of the flat space case so that the results of later chapters may receive an interpretation in terms of familiar concepts. These chapters fulfil a second, equally important, role in …
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Infinite derivative gravity : a ghost and singularity-free theory
… calculated, before being linearised around both Minkowski space and de Sitter space. The theory is then constrained so as to avoid ghosts and tachyons by appealing to the modified propagator, which is also derived. Finally, the Raychaudhuri Equation is employed in order to describe the …
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Infinite Derivative Gravity : a finite number of predictions
… compared to experimental evidence, around both Minkowski and (Anti) de Sitter backgrounds. Second, the conditions necessary for avoidance of singularities for perturbations around Minkowski and (Anti) de Sitter spacetimes are found, as well as for background Friedmann- Robertson-Walker …
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Tensorwertige additive Funktionale auf konvexen Körpern
… gemischte tensorielle Momente hergeleitet, Minkowski-Tensoren betrachtet, Integralgeometrische Formeln hergeleitet und eine Basis des Vektorraumes der tensorwertigen stetigen additiven bewegungskovarianten Funktionale bestimmt.
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Dimensions in Random Constructions.
… their dimensions and find their packing and Minkowski dimensions. Also we investigate the packing measure in corresponding dimension. For a class of random distribution functions we prove that their packing and Hausdorff dimensions coincide.
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Tautness and Kobayashi hyperbolicity
… in §1.1 we give some properties related to the Minkowski functions. In §1.3 and §1.4 we recall Royden's criterion for taut domains. Applying it we give new proofs for some known results. We also present a motivation to study k-hyperbolicity. The second chapter is devoted to studying the …
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Predicting Tolerance Effects on The Radiation Pattern of Reflectarray Antennas Through Interval Analysis
… the Enumerative interval analysis. Moreover, the Minkowski sum approach is used to eliminate the wrapping effect. In numerical validation, a set of representative results, show the power bounds computations with Interval Cartesian method (IA − CS), a modified Interval Cartesian method (IA − CS*), …
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Dynamical C*-Algebras and Quadratic Perturbations for Fermions
… with compact Cauchy surfaces, and for the Minkowski vacuum; therefore the Bogoliubov transformation is implemented via unitary operators on the associated representation Fock space. In the case of the Minkowski vacuum, we also show that the phases of the unitary implementers can be chosen …
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The inhomogeneous Universe : its average expansion and cosmic variance
… them using the robust morphological tool of the Minkowski functionals. In particular, we apply these measures to the Sloan Digital Sky Survey data release seven. We find that the morphology of the luminous red galaxy data is marginally consistent with the one derived from simulations within the …
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Exploiting the Spin Of Photons and Electrons in Light-Matter Interactions
… measurement also provides a check of the famous Minkowski-Abraham dilemma of photon angular momentum and verifies the Minkowski momentum applies in our system. Second, the coupling of light polarization and electron spin orientation is in- vestigated in the optical excitation of surface states in …
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Simulation algorithms for fractal radiation
… fractal series are components of the so-called "Minkowski island", and the patterns are generated, through successive iterations, from a square patch, usually referred to as the initiator or pre-fractal. Simulation software was specifically developed for the characterization of these structures …
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