Los conceptos de naturaleza y de estado natural en Cervantes y el Quijote

Los dos conceptos que figuran en el título del presente trabajo desempeñan bajo diversos aspectos un papel importante en el pensamiento y en la obra de Cervantes. Comencemos con algunas consideraciones sobre la relación entre naturaleza y arte. Esta relación preocupó desde luego constantemente al artista y creador que era Cervantes. El arte en sus diferentes modos y géneros es mímesis, es imitación de la naturaleza, así reza ya la constatación de Aristóteles al principio de su Poética. Con respecto a la poética de nuestro autor, Edward C. Riley (1971: 99), en su Teoría de la novela en Cervantes, constató correspondientemente: «En el centro de la teoría literaria de Cervantes se halla la antigua dicotomía entre el arte y la naturaleza»

Lope de Vega, La Malcasada

Se trata de un modelo de edición crítica. Una tesis doctoral y numerosos artículos dan fe de que el editor, Christian Andrés, es un buen conocedor de la obra de Lope de Vega. La Malcasada, comedia de enredo de 1621, se distingue por la madurez artística y por la lograda y convincente realización. Situada en la corte madrileña, se desarrolla una divertida y animada acción con una original intriga amorosa. Feliciana, una madre autoritaria, domina a su hermosa hija Lucrecia y la fuerza a dos cas..

Production of He-4 and (4) in Pb-Pb collisions at root(NN)-N-S=2.76 TeV at the LHC

Results on the production of He-4 and (4) nuclei in Pb-Pb collisions at root(NN)-N-S = 2.76 TeV in the rapidity range vertical bar y vertical bar <1, using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0-10% central events are found to be dN/dy4(He) = (0.8 +/- 0.4 (stat) +/- 0.3 (syst)) x 10(-6) and dN/dy4 = (1.1 +/- 0.4 (stat) +/- 0.2 (syst)) x 10(-6), respectively. This is in agreement with the statistical thermal model expectation assuming the same chemical freeze-out temperature (T-chem = 156 MeV) as for light hadrons. The measured ratio of (4)/He-4 is 1.4 +/- 0.8 (stat) +/- 0.5 (syst). (C) 2018 Published by Elsevier B.V.Peer reviewe

Differential Modulation of Membrane Structure and Fluctuations by Plant Sterols and Cholesterol

We have studied the concentration and temperature dependent influence of cholesterol, stigmasterol, and sitosterol on the global structure and the bending fluctuations of fluid dimyristoyl phosphatidylcholine and palmitoyl oleoyl phosphatidylcholine bilayers applying small-angle x-ray scattering, as well as dilatometry and ultrasound velocimetry. Independent of the lipid matrix, cholesterol was found to be most efficient in modulating bilayer thickness and elasticity, followed by sitosterol and stigmasterol. This can be attributed to the additional ethyl groups and double bond at the C17 alkyl side-chain of the two plant sterols. Hence, it seems that some flexibility of the sterol hydrocarbon chain is needed to accommodate within the lipid bilayer. In addition, we did not observe two populations of membranes within the putative liquid-ordered/liquid-disordered phase coexistence regime of binary sterol/lipid mixtures. Instead, the diffraction patterns could be interpreted in terms of a uniform phase. This lends further support to the idea of compositional fluctuations of unstable sterol rich domains recently brought up by fluorescence microscopy experiments, which contrasts the formation of stable domains within the miscibility gap of binary lipid/sterol mixtures

The ALICE Transition Radiation Detector: construction, operation, and performance

The Transition Radiation Detector (TRD) was designed and built to enhance the capabilities of the ALICE detector at the Large Hadron Collider (LHC). While aimed at providing electron identification and triggering, the TRD also contributes significantly to the track reconstruction and calibration in the central barrel of ALICE. In this paper the design, construction, operation, and performance of this detector are discussed. A pion rejection factor of up to 410 is achieved at a momentum of 1 GeV/ c in p–Pb collisions and the resolution at high transverse momentum improves by about 40% when including the TRD information in track reconstruction. The triggering capability is demonstrated both for jet, light nuclei, and electron selection