1,274 research outputs found
The blind spots of secularization
No full textAccording to several international surveys Spain is among the western countries with the most negative views of Jews. While quantitative data on the topic accumulates, there is a significant lack of interpretative approaches that might explain the particular Spanish case. This paper presents the background, methodology and major results of a discussion group-based study on antisemitism, which was conducted in Spain in the autumn of 2009. The study identifies and locates in different socio-economic and ideological milieus the range of stereotypical discourses on Jews, Judaism and the Arab–Israeli conflict in Spain. Analysis of the group meetings shows that, despite growing secularization in Spanish society, the central explanatory variable for persisting and resurging antisemitism in this country is still religion in a broad cultural sense.N
Métricas de autor Alejandro Gómez Jaramillo
No full textInforme de las métricas de autor del Dr. Alejandro Gómez Jaramillo de las publicaciones indexadas en Google Académico cuyo objetivo es entregar un insumo para el fortalecimiento de las capacidades y potencialidades de los autores de la Universidad Santo Tomás en el posicionamiento y visibilidad de sus publicacionesReport of the author metrics Alejandro Gómez Jaramillo of the publications indexed in Google Scholar whose objective is to provide an input for the strengthening of the capacities and potentialities of the authors of the Santo Tomás University in the positioning and visibility of their publications.http://unidadinvestigacion.usta.edu.c
Spectral behavior of contractive noise
No full textWe study the behavior of the spectra corresponding to quantum systems subjected to a contractive noise, i.e., the environment reduces the accessible phase space of the system, but the total probability is conserved. We find that the number of long-lived resonances grows as a power law in but surprisingly there is no relationship between the exponent of this power law and the fractal dimension of the corresponding classical attractor. This is in disagreement with the predictions of the fractal Weyl law which has been established for open systems, where the probability is lost under the effect of a projective opening.Fil: Carlo, Gabriel Gustavo. Comisión Nacional de Energía Atómica. Gerencia del Área de Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Constituyentes); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Spina, Maria Elena. Comisión Nacional de Energía Atómica. Gerencia del Área de Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Constituyentes); ArgentinaFil: Rivas, Alejandro Mariano Fidel. Comisión Nacional de Energía Atómica. Gerencia del Área de Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Constituyentes); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Out-of-time ordered correlators, complexity, and entropy in bipartite systems
No full textThere is a remarkable interest in the study of out-of-time ordered correlators (OTOCs) that goes from many-body theory and high-energy physics to quantum chaos. In the latter case there is a special focus on the comparison with the traditional measures of quantum complexity such as the spectral statistics. The exponential growth has been verified for many paradigmatic maps and systems. However, less is known for multipartite cases. On the other hand, the recently introduced Wigner separability entropy (WSE) and its classical counterpart provide a complexity measure that treats equally quantum and classical distributions in phase space. We compare the behavior of these measures in a system consisting of two coupled and perturbed cat maps with different dynamics: Double hyperbolic, double elliptic, and mixed. In all cases, we find that the OTOCs and the WSE have essentially the same behavior, providing a complete characterization in generic bipartite systems and at the same time revealing them as very good measures of quantum complexity for phase-space distributions. Moreover, we establish a relation between both quantities by means of a recently proven theorem linking the second Rényi entropy and OTOCs.Fil: Bergamasco, Pablo D.. Comisión Nacional de Energía Atómica; ArgentinaFil: Carlo, Gabriel Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; ArgentinaFil: Rivas, Alejandro Mariano Fidel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentin
Quantum and classical complexity in coupled maps
No full textWe study a generic and paradigmatic two-degrees-of-freedom system consisting of two coupled perturbed cat maps with different types of dynamics. The Wigner separability entropy (WSE)—equivalent to the operator space entanglement entropy—and the classical separability entropy (CSE) are used as measures of complexity. For the case where both degrees of freedom are hyperbolic, the maps are classically ergodic and the WSE and the CSE behave similarly, growing to higher values than in the doubly elliptic case. However, when one map is elliptic and the other hyperbolic, the WSE reaches the same asymptotic value than that of the doubly hyperbolic case but at a much slower rate. The CSE only follows the WSE for a few map steps, revealing that classical dynamical features are not enough to explain complexity growth.Fil: Bergamasco, Pablo D.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; ArgentinaFil: Carlo, Gabriel Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; ArgentinaFil: Rivas, Alejandro Mariano Fidel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentin
Electrochemical Sensing of Uric Acid Using Glassy Carbon Modified with Multiwall Carbon Nanotubes Dispersed in Polyethylenimine
No full textThis work reports the advantages of using glassy carbon electrodes modified with multiwall carbon nanotubes (MWCNT) dispersed in polyethylenimine (PEI). The presence of MWCNTs wrapped by PEI largely facilitated the strong adsorption of uric acid (UA) and allowed its highly sensitive and selective quantification even in the presence of high excess of ascorbic acid. The selected conditions for the electrochemical sensing were 5 s accumulation at 0.300 V under stirring and quantification in a 0.050 M phosphate buffer solution pH 7.40 by differential pulse voltammetry adsorptive-stripping after medium exchange. The platform allowed the successful application in the quantification of UA in urine.Fil: Gutiérrez Aguilar, Alejandro. Universidad Autonoma Metropolitana. Departamento de Química; MéxicoFil: Lozano, María L.. Tecnológico de Estudios Superiores del Oriente del Estado de México; MéxicoFil: Galicia, Laura. Universidad Autonoma Metropolitana. Departamento de Química; MéxicoFil: Ferreyra, Nancy Fabiana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaFil: Rivas, Gustavo Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentin
Classical counterparts of quantum attractors in generic dissipative systems
No full textIn the context of dissipative systems, we show that for any quantum chaotic attractor a corresponding classical chaotic attractor can always be found. We provide a general way to locate them, rooted in the structure of the parameter space (which is typically bidimensional, accounting for the forcing strength and dissipation parameters). In cases where an approximate pointlike quantum distribution is found, it can be associated with exceptionally large regular structures. Moreover, supposedly anomalous quantum chaotic behavior can be very well reproduced by the classical dynamics plus Gaussian noise of the size of an effective Planck constant ℏeff. We give support to our conjectures by means of two paradigmatic examples of quantum chaos and transport theory. In particular, a dissipative driven system becomes fundamental in order to extend their validity to generic cases.Fil: Carlo, Gabriel Gustavo. Comisión Nacional de Energía Atómica. Gerencia Química. CAC; ArgentinaFil: Ermann, Leonardo. Comisión Nacional de Energía Atómica. Gerencia Química. CAC; ArgentinaFil: Rivas, Alejandro Mariano Fidel. Comisión Nacional de Energía Atómica. Gerencia Química. CAC; ArgentinaFil: Spina, Maria Elena. Comisión Nacional de Energía Atómica. Gerencia Química. CAC; ArgentinaFil: Poletti, Dario. Singapore University of Technology and Design; Singapu
Signatures of classical structures in the leading eigenstates of quantum dissipative systems
No full textBy analyzing a paradigmatic example of the theory of dissipative systems - the classical and quantum dissipative standard map - we are able to explain the main features of the decay to the quantum equilibrium state. The classical isoperiodic stable structures typically present in the parameter space of these kinds of systems play a fundamental role. In fact, we have found that the period of stable structures that are near in this space determines the phase of the leading eigenstates of the corresponding quantum superoperator. Moreover, the eigenvectors show a strong localization on the corresponding periodic orbits (limit cycles). We show that this sort of scarring phenomenon (an established property of Hamiltonian and projectively open systems) is present in the dissipative case and it is of extreme simplicity.Fil: Carlo, Gabriel G.. Comisión Nacional de Energía Atómica; ArgentinaFil: Ermann, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; ArgentinaFil: Rivas, Alejandro Mariano Fidel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; ArgentinaFil: Spina, Maria Elena. Comisión Nacional de Energía Atómica; Argentin
Libros y tratos en la república literaria hispano-mexicana. Historias. Revista de la Dirección de Estudios Históricos Num. 81 (2012) enero-abril
No full textLeoncio López-Ocón, .Las actividades americanistas del naturalista español Marcos Jiménez de la Espada., en Alejandro R. Díez Torre, Tomás Mallo et al. (coords.), La ciencia española en ultramar. Actas de las I jornadas sobre “España y las expediciones científicas en América y Filipinas., Madrid, Ateneo de Madrid, Doce Calles, 1991, pp. 363-380.Miguel Ángel Puig-Samper, .Románticos y nacionalistas. La comisión Científica del Pacífico (1862-1866)”, en Alejandro R. Díez Torre, Tomás Mallo et al. (coord.), op. cit., pp. 335-345.Biblioteca Cervantina, Colección Ignacio Bernal del Instituto Tecnológico de Estudios Superiores de Monterrey, en adelante BCCIB: Carta de Joaquín García Icazbalceta a Cesáreo Fernández Duro, México, 30 de abril de 1884.Joaquín García Icazbalceta (ed.), Colección de documentos para la Historia de México, 2 vols., México, Imprenta y Librería de J. M. Andrade, 1858 (vol. 1), 1866 (vol. 2).Joaquín García Icazbalceta (ed.), Nueva colección de documentos para la historia de México, 5 vols. México, Imprenta de Francisco Díaz de León, 1886 (vol. 1), 1889 (vol. 2), 1891 (vol. 3), 1892 (vol. 4) y 1892 (vol. 5).Joaquín García Icazbalceta, Bibliografía mexicana del siglo XVI. Primera parte. Catálogo razonado de libros impresos en México de 1539 a 1600, México, Librería de Andrade y Morales Sucesores/ Imprenta de Francisco Díaz de León, 1886.Joaquín García Icazbalceta, .Observaciones presenta- das a la Sociedad Mexicana de Geografía y Estadística, por el socio de número que suscribe, acerca de la proyectada reimpresión de la Biblioteca Hispano-americana Septentrional del Dr. Beristáin., en Boletín de la Sociedad Mexicana de Geografía y Estadística, México, 1864, t. X, pp. 77-88.Francisco Cervantes de Salazar, México en 1554. Tres diálogos latinos que Francisco Cervantes de Salazar escribió e imprimió en México en dicho año (edición, traducción castellana y notas de Joaquín García Icazbalceta), México, Francisco Díaz de León y Santiago White, 1875.Marcos Jiménez de la Espada, .La imprenta en México. Carta a Don F. de T.., en Revista Europea, año V, t. XII, núm. 234 de la colección, núm. 233 del año de 1878, pp. 216-221.Cartas de Indias, publícalas por primera vez el Ministerio de Fomento, 3 vols., Madrid, Imprenta de Manuel G. Hernández, 1877.Joaquín García Icazbalceta (ed.), Cartas de religiosos de Nueva España, 1539-1594, México, Imprenta de Fran- cisco Díaz de León, 1886 (Nueva colección de documentos para la historia de México, vol. 1).Joaquín García Icazbalceta (ed.), Pomar y Zurita. Po- mar. Relación de Tezcoco. Zurita. Breve Relación de los Se- ñores de la Nueva España. Varias Relaciones Antiguas (siglo XVI), México, Imprenta de Francisco Díaz de León, 1891 (Nueva colección de documentos para la historia de México, vol. 3).Vicente Barrantes, Catálogo razonado y crítico de los libros, memorias, papeles, impresos y manuscritos que trata de las provincias de Extremadura; a si tocante a su historia, religión y geografía, como a sus antigüedades, nobleza y hombres célebres, Madrid, Imp. y Estereotipia de M. Rivadeneyra, 1865.Cultural and intellectual circumstances in the second half of the nineteenth century in Spain led to the establishment of agreements in the world of letters that permitted the culmmination of several collaborative projects forged within the framework of so-called Panhispanicism, intended to “strengthen the political, economic and cultural ties of Spain, as a guiding power, with its former colonies at the same time it was intended to curb American expansionism.” In Mexico some initiatives, although with limitations, came into being, whose aim was to recover books and documents to complete the bibliographic corpus necessary to write and reinterpret history itself.</p
Pyrochlore Manganites Spin Dynamics In The Paramagnetic Regime
No full textWe report electron spin resonance (ESR) and dc magnetic susceptibility in polycrystalline pyrochlores A2Mn2O7 (A=Y, Tl) measured in the paramagnetic phase up to 600 K. It is shown that the ESR linewidth has a universal behavior given by ΔHpp(T) = ΔHpp(T→∞)[C/Tχdc(T)], where C is the single-ion Curie constant. The high-temperature limit for the linewidth, given by ΔHpp(T→∞)∝(ωp)2/J, is determined by the superexchange constant J for each material. A value of (ωp/γ) = 6300 G was found for all pyrochlores, including In2Mn2O7. Different broadening mechanisms are discussed. © 1999 American Institute of Physics.858 II B54085410Jin, S., Tiefeid, T.H., McCormack, M., Fastnach, R.A., Ramesh, R., Chen, L.H., (1994) Science, 264, p. 413Millis, A.J., Littlewood, P.B., Shraiman, B.I., (1995) Phys. Rev. Lett., 74, p. 5144Allub, R., Alascio, B., (1997) Phys. Rev. B, 55, p. 14113Rettori, C., Rao, D., Singley, J., Kidwell, D., Oseroff, S.B., Causa, M.T., Neumeier, J.J., Schultz, S., (1997) Phys. Rev. B, 55, p. 3083Granado, E., Pagliuso, P.G., Sanjurjo, J.A., Rettori, C., Oseroff, S.B., Causa, M.T., Butera, A., Rivas, J., (1998) Non-Crystalline and Nanoscale Materials, pp. 105-115. , edited by J. Rivas and M. A. López-Quintela World Scientific, SingaporeCausa, M.T., (1998) Phys. Rev. B, 58, p. 3233Tovar, M., (1998) J. Appl. Phys., 83, p. 7201Rosenfeld, H.D., Subramanian, M.A., (1996) J. Solid State Chem., 125, p. 278Subramanian, M.A., Torardi, C.C., Johnson, D.C., Pannetier, J., Sleight, A.W., (1988) J. Solid State Chem., 72, p. 24Reimers, J.N., Greedan, J.E., Kremer, R.K., Gmelin, E., Subramanian, M.A., (1991) Phys. Rev. B, 43, p. 3387Raju, N.P., Greedan, J.E., Subramanian, M.A., (1994) Phys. Rev. B, 49, p. 1086Hwang, H.Y., Cheong, S.-W., (1997) Nature (London), 389, p. 942Ventura, C., Alascio, B., (1997) Phys. Rev. B, 56, p. 14533Kennedy, B.J., (1998) Physica B, 241-243, p. 303Cox, D., private communicationSeehra, M.S., (1968) Rev. Sci. Instrum., 39, p. 1044Anderson, P.W., Weiss, P.R., (1953) Rev. Mod. Phys., 25, p. 269Huber, D.L., (1998) J. Appl. Phys., 83, p. 6949Huber, D.L., Causa, M.T., Tovar, M., private communicationCausa, M.T., Alejandro, G., Zysler, R., Prado, F., Caneiro, A., Tovar, M., J. Magn. Magn. Mater., , in pres
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