Presencia del Coríxido neártico Trichocorixa verticalis verticalis (Fieber, 1851) (Heteroptera, Corixidae) en el Algarve (S Portugal)

This paper describes the presence of the nearctic water boatman Trichocorixa verticalis verticalis in southern Portugal. This species has been cited recently for the first time in Europe from individuals captured in southern Spain. This species, native to Atlantic coast of America, has also been cited from New Caledonia and South Africa, and has been found in the open sea. Two kinds of introduction are reported for this species: involuntary introduction with exotic fish, and passive dispersion through marine currents and severe storms. The possibility of this kind of introduction in Europe is discussed.Esta nota describe la presencia del coríxido neártico Trichocorixa verticalis verticalis en el sur de Portugal. Recientemente, esta especie ha sido citada por primera vez en Europa de ejemplares capturados en el sur de España. Esta especie, nativa de la costa atlántica americana, también ha sido citada en Nueva Caledonia y África del Sur, y se ha encontrado en mar abierto. Se conocen dos vías de introducción de esta especie: introducción involuntaria a través de peces exóticos y dispersión pasiva a través de corrientes marinas y fuertes tormentas. Se discuten las posibilidades de estas dos vías de introducción en Europa

Light-Trap: A SiPM Upgrade for Very High Energy Astronomy and Beyond

With the development of the Imaging Atmospheric Cherenkov Technique (IACT), Gamma-ray astronomy has become one of the most interesting and productive fields of astrophysics. Current IACT telescope arrays (MAGIC, H.E.S.S, VERITAS) use photomultiplier tubes (PMTs) to detect the optical/near-UV Cherenkov radiation emitted due to the interaction of gamma rays with the atmosphere. For the next generation of IACT experiments, the possibility of replacing the PMTs with Silicon photomultipliers (SiPMs) is being studied. Among the main drawbacks of SiPMs are their limited active area (leading to an increase in the cost and complexity of the camera readout) and their sensitivity to unwanted wavelengths. Here we propose a novel method to build a relatively low-cost pixel consisting of a SiPM attached to a PMMA disc doped with a wavelength shifter. This pixel collects light over a much larger area than a single standard SiPM and improves sensitivity to near-UV light while simultaneously rejecting background. We describe the design of a detector that could also have applications in other fields where detection area and cost are crucial. We present results of simulations and laboratory measurements of a pixel prototype and from field tests performed with a 7-pixel cluster installed in a MAGIC telescope camera.Comment: Proceedings of the 35th International Cosmic Ray Conference (ICRC 2017), Bexco, Busan, Korea. Id:81

Product placement analysis in three Netflix original series

La publicidad ha encontrado un obstáculo con la proliferación de plataformas como Netflix y esto ha provocado el impulso del emplazamiento de producto. Mediante un análisis de contenido, este estudio exploratorio examina el uso del emplazamiento de producto en tres series originales de Netflix, para comprender cómo se comporta en esta plataforma. Los resultados indican que se trata de una fórmula asentada, pero que el tipo de emplazamiento o el número de marcas están determinados por la trama. Igualmente, que la audiencia no se restrinja a un país concreto parece favorecer la presencia de marcas globales.Advertising has encountered an obstacle with the proliferation of platforms like Netflix and this has sparked a boost in product placement. Through a content analysis, this exploratory study examines the use of product placement in three of Netflix’s original series, to understand how it behaves on this platform. The results indicate that it is a settled formula, but that the type of location or the number of marks is determined by the plot. Likewise, the fact that the audience is not restricted to a specific country seems to favor the presence of global brands

Analysis of U1snRNP-specific A protein cross-linked complexes

AbstractThe organization of the UlsnRNP-specific A protein (34 kDa) has been analyzed by 12 and 16 Å thiol-reversible chemical cross-linking and Western blotting. A-containing cross-linked complexes had molecular masses of 43, 47, 56, 62, 67, 105 and 125 kDa. None of these complexes could be cross-linked following ribonuclease digestion, suggesting that UsnRNA may play important roles in the spatial organization of A and other proteins. Moreover, the data suggest that A is proximal to, and may have interactions with, UsnRNP-specific proteins C and 70 kDa as well as with UsnRNP-common proteins B, E and G

A Light Calibration System for the ProtoDUNE-DP Detector

A LED-based fiber calibration system for the ProtoDUNE-Dual Phase (DP) photon detection system (PDS) has been designed and validated. ProtoDUNE-DP is a 6x6x6 m3 liquid argon time-projection-chamber currently being installed at the Neutrino Platform at CERN. The PDS is based on 36 8-inch photomultiplier tubes (PMTs) and will allow triggering on cosmic rays. The system serves as prototype for the PDS of the final DUNE DP far detector in which the PDS also has the function to allow the 3D event reconstruction on non-beam physics. For this purpose an equalized PMT response is desirable to allow using the same threshold definition for all PMT groups, simplifying the determination of the trigger efficiency. The light calibration system described in this paper is developed to provide this and to monitor the PMT performance in-situ.Comment: 15 pages, 5 figure

Extraordinary transmission and radiation from finite by infinite arrays of slots

This is the author accepted manuscript. The final version is available from IEEE via the DOI in this recordIn this communication an efficient Method of Moments (MoM) code is used for the analysis of the extraordinary transmission (EOT) through a periodic array of rectangular slots in a conducting screen, in the case where the number of slots is finite in one direction and infinite in the orthogonal direction. The slots can be arbitrarily rotated within the periodic unit cell. Once the magnetic current density on the slots is obtained by means of MoM, both the transmission coefficient and the far field radiated by the array of slots are computed. The onset of EOT turns out to be strongly dependent on the orientation of the slots with respect to the direction in which the array is infinite. If the slots are perpendicular to this direction, EOT appears for a single infinite chain of slots. However, tens of parallel chains of slots are required to reproduce the EOT response when the slots are aligned along the parallel chains direction. The obtained radiation patterns show the excitation of grating lobes as the number of slots grows in the direction where the arrays are finite.Engineering and Physical Sciences Research Council (EPSRC)Junta de AndaluciaSpanish Ministry of Economy, Industry and Competitivenes