Search results for "ESA"
showing 10 items of 11914 documents
Desigualdad, Pobreza y Exclusión Social: aproximación comparativa entre la Región de Murcia y España
2011
Nueva pobreza y exclusion social de jovenes y mujeres en España: el caso de Aragón
2011
Pobreza en España: jóvenes y mujeres en los espacios sociales de la vulnerabilidad
2011
This number of Quaderns presents the results of two research projects of the program I+D+i financed by the Spanish Ministry of Education for the period 2008 to 2011. The first project is called 'New poverty and social exclusion among youth in Spain' and was supervised by Ph. D. Ignasi Brunet. The second project was developed under the name of 'Poverty, social exclusion and gender inequality in Spain' and was supervised by Ph. D. Ángel Belzunegui. Both projects counted with a group formed by researchers from six Spanish universities from different regions where field work was carried out: Andalucía, Aragón, Cataluña, Comunidad Valenciana, Murcia y País Vasco. The first project has analyzed p…
Una nación de cartón-piedra : las ficciones históricas de Cifesa
2012
El presente texto analiza las estrategias narrativas e iconográficas puestas en marcha por los films que la productora CIFESA emprendió a comienzos de los años 50. En todas ellas, y a diferencia del presentismo de las películas de 'cruzada', el pasado legendario de España, según la visión de los vencedores de la guerra civil, se convertía en espejo en el que se reconocían las gestas cercanas de 1936. Remontándose al reinado de Isabel la Católica, a la guerra de Sucesión, a las gestas de la Guerra de Independencia, etc., los relatos de CIFESA se apoyaban en el drama postromántico y la pintura histórica. Este texto examina, articulando cuestiones formales e ideológicas, estas fuentes y su fun…
Cinema e paesaggio nel Terje Vigen di Victor Sjöström
2021
Secondo la tradizione i film svedesi sono percepiti come essenziali e minimalisti, algidi e scarni, coerentemente con le latitudini del paese scandinavo. Durante l’età d’oro del cinema svedese (1917-1924) emerge in essi un’inedita caratteristica: la capacità di trasferire efficacemente nelle immagini i dilemmi esistenziali dell’essere umano sfruttando la potenza evocativa del paesaggio. In tale direzione, il contributo intende analizzare il ruolo del paesaggio svedese nell’opera che apre l’età d’oro, il film Terje Vigen di Victor Sjöström. Traditionally, Swedish films are recognized as serious and frozen, in line with the latitudes of Scandinavian Peninsula. The Golden age of Swedish Cinema…
Musical pitch quantization as an eigenvalue problem
2020
How can discrete pitches and chords emerge from the continuum of sound? Using a quantum cognition model of tonal music, we prove that the associated Schrödinger equation in Fourier space is invariant under continuous pitch transpositions. However, this symmetry is broken in the case of transpositions of chords, entailing a discrete cyclic group as transposition symmetry. Our research relates quantum mechanics with music and is consistent with music theory and seminal insights by Hermann von Helmholtz.
Coherence resonance in Bonhoeffer-Van der Pol circuit
2009
International audience; A nonlinear electronic circuit simulating the neuronal activity in a noisy environment is proposed. This electronic circuit is exactly ruled by the set of Bonhoeffer-Van Der Pol equations and is excited with a Gaussian noise. Without external deterministic stimuli, it is shown that the circuit exhibits the so-called 'coherence resonance' phenomenon.
The dependence of circular dichroism in photoemission on the optical properties of Cs monolayers on Pt(111)
1997
We report on the dependence of dichroic photoemission excited by circularly polarised light on the angle of photon incidence. We measured the difference in the angle-resolved photoemission intensities from Cs 5p semi-core levels excited by photons of opposite helicity, which is known as CDAD. We found that the dependence of the measured differences on the angle of light incidence deviates strongly from the model of CDAD for free atoms, as expected. Using the Fresnel equations and a complex index of refraction, one finds that not only the third component but also the second component of the Stokes vector is responsible for the excitation process. Both Stokes components change sign if the ini…
Two new flavonoids from Dracaena usambarensis Engl.
2020
Abstract Investigations of the root extract of Dracaena usambarensis Engl. for anticancer principles led to the characterization of one new homoisoflavonoid, (3S)-3,4ʹ,5,6-tetrahydroxy-7-methoxyhomoisoflavanone (1) and a new retrodihydrochalcone, 4ʹ,4-dihydroxy-2,3-dimethoxydihydrochalcone (2) along with six previously reported compounds, including two homoisoflavonoids, 7-O-methyl-8-demethoxy-3-hydroxy-3,9-dihydropunctatin (3) and loureiriol (4); a phenolic amide, 3-(4ʹʹʹ-hydroxyphenyl)-N-[2ʹ-(4ʹʹ-hydroxyphenyl)-2ʹ-methoxyethyl]acrylamide (5); a spirostane, 25S-spirosta-1,4-dien-3-one (6) and two steroids, stigmasterol (7) and stigmasterol 3-O-β-D-glucopyranoside (8). The structures of 1-8…
Nickel(II), copper(II) and zinc(II) metallo-intercalators: structural details of the DNA-binding by a combined experimental and computational investi…
2014
We present a thorough characterization of the interaction of novel nickel(II) (1), copper(II) (2) and zinc(II) (3) Schiff base complexes with native calf thymus DNA (ct-DNA), in buffered aqueous solution at pH 7.5. UV-vis absorption, circular dichroism (CD) and viscometry titrations provided clear evidence of the intercalative mechanism of the three square-planar metal complexes, allowing us to determine the intrinsic DNA-binding constants (K(b)), equal to 1.3 × 10(7), 2.9 × 10(6), and 6.2 × 10(5) M(-1) for 1, 2 and 3, respectively. Preferential affinity, of one order of magnitude, toward AT compared to GC base pair sequences was detected by UV-vis absorption titrations of 1 with [poly(dG-d…