Search results for "9(39)"
showing 10 items of 677 documents
The Symmetry and Predictive Factors in Two-Stage Bilateral Hip Replacement Procedures
2021
Background: Approximately 10–25% of total hip replacement patients undergo a bilateral procedure. The purpose of this study was to compare selected parameters associated with the first and second hip arthroplasty in patients undergoing two-stage treatment due to bilateral hip osteoarthritis and establish the predictive factors for the second procedure. Methods: This study compared the data on bilateral total hip replacement surgeries conducted in the period between 2017 and 2021 (42 patients). The following parameters from the first and second procedure were compared: the prosthetic stem, head, and insert cup size
Spin Chains with Non-Diagonal Boundaries and Trigonometric SOS Model with Reflecting End
2011
In this paper we consider two a priori very different problems: construction of the eigenstates of the spin chains with non parallel boundary magnetic fields and computation of the partition function for the trigonometric solid-on-solid (SOS) model with one reflecting end and domain wall boundary conditions. We show that these two problems are related through a gauge transformation (so-called vertex-face transformation) and can be solved using the same dynamical reflection algebras.
Quantum Algorithms for Some Strings Problems Based on Quantum String Comparator
2022
We study algorithms for solving three problems on strings. These are sorting of n strings of length k, “the Most Frequent String Search Problem”, and “searching intersection of two sequences of strings”. We construct quantum algorithms that are faster than classical (randomized or deterministic) counterparts for each of these problems. The quantum algorithms are based on the quantum procedure for comparing two strings of length k in O(k) queries. The first problem is sorting n strings of length k. We show that classical complexity of the problem is Θ(nk) for constant size alphabet, but our quantum algorithm has O˜(nk) complexity. The second one is searching the most frequent string among n …
Introducción
2017
Emilia Elías Herrando (Madrid, 1898 – Ciudad de México 1976) fue una destacada pedagoga que trabajó en la formación de maestros en España y México. Completó su actividad docente, traduciendo textos de importantes representantes de la Escuela Nueva como Deschamps, Carrier y Decroly. Estuvo afiliada a la Federación de Trabajadores de la Enseñanza (FETE), al Partido Comunista de España (PCE) y fue dirigente de la Agrupación de Mujeres Antifascistas (AMA). Tras la Guerra Civil se vio forzada a exiliarse a México, en donde pudo reconstruir su trayectoria profesional en instituciones normalistas y con alumnado netamente mexicanos. Completó su actividad publicando un buen número de manuales, algun…
Historia y memoria de la educación : HMe
2019
Finalizada la Segunda Guerra Mundial en 1945, fueron muchos los que creyeron que el fin del conflicto supondría la caída del franquismo, el regreso del gobierno republicano y la vuelta de la democracia a España. Desde el exilio, el retorno estuvo muy presente en publicaciones, reuniones, manifiestos y acciones políticas, especialmente en México y en Francia. Entre los temas tratados en los círculos de los desterrados con mayor implicación política e intelectual sobresalió la educación, dada la importancia que se le daba a la formación de las nuevas generaciones de españoles que deberían de retomar los principios y valores republicanos. El artículo examina tres documentos con propuestas de l…
Espacio, tiempo y educación
2015
This paper analyzes the role played by the student movement in the restitution of democracy in Spain. Taking as a starting point the situation of university under the Franco dictatorship, and how (and why) students were dealt with, the major features that set the student movement apart from other kinds of activism in that time are described and linked to the unique effects that it had on the status quo, with a special stress on its ability to generate the kind of cultural change required for overcoming the atmosphere of resignation and consent that helped to keep the government in power. The way in which culture, personal issues, and politics got intertwined is shown as a key trait of stude…
Cambio generacional, familia y profesorado en la crisis de la educación política franquista
2018
Resumen basado en el de la publicación Título, resumen y palabras clave en español y en inglés Se analiza la crisis de la educación política impulsada por la dictadura franquista durante los años sesenta y setenta atendiendo a la importancia del cambio generacional. Se basa en una investigación en profundidad con fuentes orales e informes oficiales centrada en el caso del País Valenciano. Por una parte, se analizan los procesos de educación política en la identificación con la dictadura de Franco desarrollados en el ámbito de las familias «vencedoras», prestando una particular atención a su agotamiento entre los nacidos a partir de finales de los años cuarenta. Por otra parte, se analizan l…
Generalized Camassa-Holm Equations: Symmetry, Conservation Laws and Regular Pulse and Front Solutions
2021
In this paper, we consider a member of an integrable family of generalized Camassa–Holm (GCH) equations. We make an analysis of the point Lie symmetries of these equations by using the Lie method of infinitesimals. We derive nonclassical symmetries and we find new symmetries via the nonclassical method, which cannot be obtained by Lie symmetry method. We employ the multiplier method to construct conservation laws for this family of GCH equations. Using the conservation laws of the underlying equation, double reduction is also constructed. Finally, we investigate traveling waves of the GCH equations. We derive convergent series solutions both for the homoclinic and heteroclinic orbits of the…
Quasi-Lie Brackets and the Breaking of Time-Translation Symmetry for Quantum Systems Embedded in Classical Baths
2018
Many open quantum systems encountered in both natural and synthetic situations are embedded in classical-like baths. Often, the bath degrees of freedom may be represented in terms of canonically conjugate coordinates, but in some cases they may require a non-canonical or non-Hamiltonian representation. Herein, we review an approach to the dynamics and statistical mechanics of quantum subsystems embedded in either non-canonical or non-Hamiltonian classical-like baths which is based on operator-valued quasi-probability functions. These functions typically evolve through the action of quasi-Lie brackets and their associated Quantum-Classical Liouville Equations, or through quasi-Lie brackets a…
Steiner configurations ideals: Containment and colouring
2021
Given a homogeneous ideal I&sube