Search results for "Jacob"

Słowo, które staje się obrazem, w tradycji chrześcijan syryjskich

2017

Artykuł podejmuje problematykę sztuki figuratywnej w teologicznej przestrzeni tradycji Kościołów syryjskich. Chociaż wspólnoty te w początkowym stadium rozwoju stanowiły integralną część Cesarstwa Wschodniorzymskiego, to jednak wypracowały zupełnie inny model obrazowania, którym nie są ikony czy też inne formy malarskie. Głównym sposobem malowania teologii było dla Syryjczyków słowo. Taki stan rzeczy nie wynikał bezpośrednio z odziedziczonego po judaizmie zakazu wyobrażeń sacrum czy jakiegoś wewnętrznego ikonoklazmu, ale z mentalności i wrażliwości ludów Bliskiego Wschodu. Autor, odwołując się do trzech pisarzy syryjskich – Efrema, Afrahata i Jakuba z Sarug – prezentuje kilka przykładów tek…

Abelian varieties and theta functions associated to compact Riemannian manifolds; constructions inspired by superstring theory

2012

We look into a construction of principal abelian varieties attached to certain spin manifolds, due to Witten and Moore-Witten around 2000 and try to place it in a broader framework. This is related to Weil intermediate Jacobians but it also suggests to associate abelian varieties to polarized even weight Hodge structures. The latter construction can also be explained in terms of algebraic groups which might be useful from the point of view of Tannakian categories. The constructions depend on moduli much as in Teichm\"uller theory although the period maps in general are only real analytic. One of the nice features is how the index for certain differential operators canonically associated to …

Ultreya, suseya, Santiago!” Viaggio e spazialità ne La ballata dei pellegrini

2020

Per studiare dal punto di vista della geografia culturale alcuni aspetti del pellegrinaggio a Santiago de Compostela, in Spagna, il capitolo prende in considerazione un testo letterario, il romanzo autobiografico "La ballata dei pellegrini" della scrittrice francese Edith De La Héronnière, pubblicato per la prima volta nel 1993 e tradotto in italiano nel 2004. Il romanzo racconta l’esperienza del pellegrinaggio giacobeo effettuato dall’autrice negli anni Novanta assieme a tre compagni di viaggio partendo da un cammino francese. In particolare, attraverso l’analisi di alcune parti del testo, si indagano le modalità attraverso le quali la narrazione costruisce e descrive lo spazio fisico e si…

Apocryphal Passions of the Apostles in Croatian Glagolitic Texts

2020

In the course of the Middle Ages, apocryphal and hagiographic texts of The Acts of the Apostles of various origins became part of the Croatian Glagolitic literature. The Passion of Saint Andrew, for example, is documented in the sanctorale of nineteen Croatian Glagolitic breviaries dating from the period between the 14th and mid-16th centuries. The Glagolitic Passion is an abbreviated translation of the Latin Epistula presbyterorum et diaconorum Achaiae (BHL 428) from the 6th century. The texts of the Passion of Jamesthe Apostle (Jacobus Maior, apost., filius Zebedaei, frater Johannis, Passio, BHL 4057) are found in two Glagolitic breviaries, namely the Breviary of Vitus of Omi?alj (1396) a…

Enfermedad de Jacob asociada con el síndrome de disfunción de la articulación temporomandibular: presentación de un caso

2005

La enfermedad de Jacob se describe como una entidad infrecuente en la cual se establece una formación articular sinovial entre una apófisis coronoide mandibular elongada y el hueso malar homolateral. El Síndrome de disfunción de la articulación temporomandibular (ATM) ha sido postulado como posible factor etiológico del alargamiento este proceso coronoideo. Presentamos el caso de una mujer de 23 años con un desplazamiento discal de ATM de larga evolución y limitación de la apertura oral, que desarrolló una asimetría malar progresiva. La paciente fue sometida a tratamiento quirúrgico mediante una coronoidectomía intraoral y una artroscopia de la ATM homolateral en el mismo acto operatorio. E…

Holder continuity of solutions for a class of nonlinear elliptic variational inequalities of high order

2001

Octupolar excitation of ion motion in a Penning trap: A theoretical study

2014

Abstract High-precision Penning-trap mass spectrometry uses the resonant conversion of the magnetron motional mode into the cyclotron motional mode to determine the cyclotron frequency of the ions under investigation. Usually the conversion process is performed by interaction of the ions with external quadrupolar rf-fields. Recently it was found that conversion by means of octupolar rf-fields entails a tremendous increase in mass resolution and is thus of great interest. However, the conversion results depend in an intricate way on the amplitudes and phases of the octupolar rf-field and of the motional modes of the ions. Experimental progress was hampered by the lack of an underlying theory…

Higher-order Hamilton–Jacobi perturbation theory for anisotropic heterogeneous media: dynamic ray tracing in Cartesian coordinates

2018

With a Hamilton–Jacobi equation in Cartesian coordinates as a starting point, it is common to use a system of ordinary differential equations describing the continuation of first-order derivatives of phase-space perturbations along a reference ray. Such derivatives can be exploited for calculating geometrical spreading on the reference ray and for establishing a framework for second-order extrapolation of traveltime to points outside the reference ray. The continuation of first-order derivatives of phase-space perturbations has historically been referred to as dynamic ray tracing. The reason for this is its importance in the process of calculating amplitudes along the reference ray. We exte…

Extensions of the witness method to characterize under-, over- and well-constrained geometric constraint systems

2011

International audience; This paper describes new ways to tackle several important problems encountered in geometric constraint solving, in the context of CAD, and which are linked to the handling of under- and over-constrained systems. It presents a powerful decomposition algorithm of such systems. Our methods are based on the witness principle whose theoretical background is recalled in a first step. A method to generate a witness is then explained. We show that having a witness can be used to incrementally detect over-constrainedness and thus to compute a well-constrained boundary system. An algorithm is introduced to check if anchoring a given subset of the coordinates brings the number …

Second order optimality conditions in the smooth case and applications in optimal control

2007

International audience; The aim of this article is to present algorithms to compute the first conjugate time along a smooth extremal curve, where the trajectory ceases to be optimal. It is based on recent theoretical developments of geometric optimal control, and the article contains a review of second order optimality conditions. The computations are related to a test of positivity of the intrinsic second order derivative or a test of singularity of the extremal flow. We derive an algorithm called COTCOT (Conditions of Order Two and COnjugate times), available on the web, and apply it to the minimal time problem of orbit transfer, and to the attitude control problem of a rigid spacecraft. …