1,333 research outputs found

    Una modesta proposiciĂłn sobre El exiliado de aquĂ­ y allĂĄ de Juan Goytisolo

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    DespuĂ©s de la publicaciĂłn de TelĂłn de boca en 2003, los lectores y relectores de Juan Goytisolo pensaron que Ă©sta iba a ser su Ășltima novela ya que el autor declarĂł que se jubilaba como novelista. Pero luego publicĂł en 2008 El exiliado de aquĂ­ y allĂĄ, una prolongaciĂłn de Paisajes despuĂ©s de la batalla (1982), y una sĂĄtira mordaz que presenta, al estilo swiftiano, un retrato corrosivo y demoledor del mundo actual. De ahĂ­ que resultara sorprendente que Goytisolo comentara en 2014, a raĂ­z de su selecciĂłn como ganador del Premio Cervantes, que dicha novela fue «quizĂĄs innecesaria». Contrariamente al juicio del autor, argumento aquĂ­ que El exiliado de aquĂ­ y allĂĄ es una novela bien «necesaria». Es una brillante contribuciĂłn a una gran tradiciĂłn satĂ­rica, completa la visiĂłn del mundo que Goytisolo ha elaborado a lo largo de los años y marca la despedida del autor de la ficciĂłn.Les lecteurs de Juan Goytisolo avaient tout Ă  fait raison de penser que Telon de boca (2003) serait son dernier roman. Goytisolo lui-mĂȘme a declarĂ© aprĂšs sa publication qu’il prenait sa retraite en tant que romancier. Mais ensuite en 2008, il a surpris ses lecteurs en publiant El exiliado de aquĂ­ y allĂĄ, la suite de son roman de 1982, Paisajes despuĂ©s de la batalla, et une satire mordante qui se presentait comme un portrait trĂšs critique du monde actuel. En 2014, a l’occasion de sa nomination comme gagnant du prix Cervantes prestigieux, Goytisolo a surpris ses lecteurs encore une fois en remarquant que El exiliado de aquĂ­ y allĂĄ i y alla «n’était peut-ĂȘtre pas nĂ©cessaire». Cet article met en question l’opinion de Goytisolo et dĂ©montre que El exiliado de aquĂ­ y allĂĄ est en eff et «nĂ©cessaire». Le roman fait une contribution brillante Ă  une tradition satirique; il complĂšte la vision du monde que Goytisolo a Ă©laborĂ©e au cours des annĂ©es, et signale les adieux de l’auteur Ă  la fiction.Juan Goytisolo’s readers had every reason to assume that TelĂłn de boca (2003) would be his last novel. Goytisolo himself pointedly declared after its publication that he was retiring as a novelist. But then in 2008, he surprised his readers by publishing El exiliado de aquĂ­ y allĂĄ, a continuation of his 1982 novel, Paisajes despuĂ©s de la batalla, and a biting satire that presented a scathing portrait of contemporary society. In 2014, on the occasion of being named the winner of the prestigious «Premio Cervantes» (Cervantes Prize), Goytisolo surprised his public yet again by commenting that El exiliado de aquĂ­ y allĂĄ was «perhaps unnecessary.» This article argues against Goytisolo’s assertion and demonstrates that El exiliado is indeed «necessary.» It is a brilliant contribution to a rich satirical tradition; it completes the vision of the world that Goytisolo has elaborated throughout the years, and it marks the author’s farewell to fiction

    Focusing resonance cones

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    The potential for an oscillating ring source immersed in cold, magnetized, collisionless plasma in the resonance cone regime (K/K<0) is evaluated exactly and asymptotically, giving insight into the gross spatial behavior of the focusing resonance cones. The nature of the singularity in potential is clarified by the introduction of a noninfinitesimal collision frequency. Thermal effects are considered numerically, revealing an interesting interference structure in potential as well as a density depression near the focus of the cone due to the ponderomotive force

    Constraints on neutrino-photon interactions from rare Z decays

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    It is shown that the rare decays Z→ΜnuˉγZ \to \nu \bar{nu} \gamma and Zâ†’ÎœÎœË‰ÎłÎłZ \to \nu \bar{\nu} \gamma \gamma are useful to put model-independent bounds on neutrino-one-photon and neutrino-two-photon interactions. The results are then used to constrain the τ\tau neutrino magnetic moment and the double radiative decay Îœj→Μiγγ\nu_j \to \nu_i \gamma \gamma. It is found that the decay Z→ΜnuˉγZ \to \nu \bar{nu} \gamma gives a more stringent bound on the τ\tau neutrino magnetic moment than that obtained from Zâ†’ÎœÎœË‰ÎłÎłZ \to \nu \bar{\nu} \gamma \gamma; the latter decay in turn gives limits on the neutrino-two-photon interaction that are less stringent than those obtained for a sterile neutrino Îœs\nu_s from the analysis of ΜΌN→ΜsN\nu_\mu N \to \nu_s N conversion.Comment: 11 pages, 5 figures, elsart forma

    Inference on periodicity of circadian time series

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    Estimation of the period length of time-course data from cyclical biological processes, such as those driven by the circadian pacemaker, is crucial for inferring the properties of the biological clock found in many living organisms. We propose a methodology for period estimation based on spectrum resampling (SR) techniques. Simulation studies show that SR is superior and more robust to non-sinusoidal and noisy cycles than a currently used routine based on Fourier approximations. In addition, a simple fit to the oscillations using linear least squares is available, together with a non-parametric test for detecting changes in period length which allows for period estimates with different variances, as frequently encountered in practice. The proposed methods are motivated by and applied to various data examples from chronobiology

    A Search for Wide Companions to the Extrasolar Planetary System HR 8799

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    The extrasolar planetary system around HR 8799 is the first multiplanet system ever imaged. It is also, by a wide margin, the highest mass system with >27 Jupiters of planetary mass past 25 AU. This is a remarkable system with no analogue with any other known planetary system. In the first part of this paper we investigate the nature of two faint objects imaged near the system. These objects are considerably fainter (H=20.4, and 21.6 mag) and more distant (projected separations of 612, and 534 AU) than the three known planetary companions b, c, and d (68-24 AU). It is possible that these two objects could be lower mass planets (of mass ~5 and ~3 Jupiters) that have been scattered to wider orbits. We make the first direct comparison of newly reduced archival Gemini adaptive optics images to archival HST/NICMOS images. With nearly a decade between these epochs we can accurately assess the proper motion nature of each candidate companion. We find that both objects are unbound to HR 8799 and are background. We estimate that HR 8799 has no companions of H<22 from ~5-15 arcsec. Any scattered giant planets in the HR 8799 system are >600 AU or less than 3 Jupiters in mass. In the second part of this paper we carry out a search for wider common proper motion objects. While we identify no bound companions to HR 8799, our search yields 16 objects within 1 degree in the NOMAD catalog and POSS DSS images with similar (+/-20 mas/yr) proper motions to HR 8799, three of which warrant follow-up observations.Comment: 22 pages, 8 figures, submitted to the Astrophysical Journa

    Anthropogenic ecosystem fragmentation drives shared and unique patterns of sexual signal divergence among three species of Bahamian mosquitofish

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    When confronted with similar environmental challenges, different organisms can exhibit dissimilar phenotypic responses. Therefore, understanding patterns of phenotypic divergence for closely related species requires considering distinct evolutionary histories. Here, we investigated how a common form of human-induced environmental alteration, habitat fragmentation, may drive phenotypic divergence among three closely related species of Bahamian mosquitofish (Gambusia spp.). Focusing on one phenotypic trait (male coloration), having a priori predictions of divergence, we tested whether populations persisting in fragmented habitats differed from those inhabiting unfragmented habitats and examined the consistency of the pattern across species. Species exhibited both shared and unique patterns of phenotypic divergence between the two types of habitats, with shared patterns representing the stronger effect. For all species, populations in fragmented habitats had fewer dorsal-fin spots. In contrast, the magnitude and trajectory of divergence in dorsal-fin color, a sexually selected trait, differed among species. We identified fragmentation-mediated increased turbidity as a possible driver of these trait shifts. These results suggest that even closely related species can exhibit diverse phenotypic responses when encountering similar human-mediated selection regimes. This element of unpredictability complicates forecasting the phenotypic responses of wild organisms faced with anthropogenic change - an important component of biological conservation and ecosystem management

    Constraining Jet/Disk Geometry and Radiative Processes in Stellar Black Holes XTE J1118+480 and GX 339-4

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    We present results from modeling of quasi-simultaneous broad band (radio through X-ray) observations of the galactic stellar black hole (BH) transient X-ray binary (XRB) systems XTE J1118+480 and GX 339-4 using an irradiated disc + compact jet model. In addition to quantifying the physical properties of the jet, we have developed a new irradiated disc model which also constrains the geometry and temperature of the outer accretion disc by assuming a disc heated by viscous energy release and X-ray irradiation from the inner regions. For the source XTE J1118+480, which has better spectral coverage of the two in optical and near-IR (OIR) wavelengths, we show that the entire broad band continuum can be well described by an outflow-dominated model + an irradiated disc. The best-fit radius of the outer edge of the disc is consistent with the Roche lobe geometry of the system, and the temperature of the outer edge of the accretion disc is similar to those found for other XRBs. Irradiation of the disc by the jet is found to be negligible for this source. For GX 339-4, the entire continuum is well described by the jet-dominated model only, with no disc component required. For the two XRBs, which have very different physical and orbital parameters and were in different accretion states during the observations, the sizes of the jet base are similar and both seem to prefer a high fraction of non-thermal electrons in the acceleration/shock region and a magnetically dominated plasma in the jet. These results, along with recent similar results from modeling other galactic XRBs and AGNs, may suggest an inherent unity in diversity in the geometric and radiative properties of compact jets from accreting black holes.Comment: Accepted for publication in MNRAS. Uses mn2e.cls. 17 pages, 4 figures, 3 table
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