7,431 research outputs found

    Use of flight interception traps of Malaise type and attractive traps for social wasps record (Vespidae: Polistinae)

    Get PDF
    The literature provides different methodologies for sampling social wasps, including, flight intercept trap type Malaise and Attractive trap, however, there is no consensus on its use. In this respect, the aim of this study was to evaluate the best use of Malaise traps and Attractive trap in biodiversity work of social wasps, and generate a collection protocol for the use of these traps. The study was conducted in the Parque Estadual do Rio Doce, located in the east of the state of Minas Gerais, in the years 2000, 2001, 2002 and 2004 and in the Botanical Garden of the Federal University of Juiz de Fora, located in the southeastern state of Minas Gerais, in years 2011, 2012 and 2013. 15 species were collected using Malaise traps, and, 26 species of social wasps were collected using Attractive traps. Although the negative aspects of both traps, complementary methodologies surveys varying social wasps are useful and it is recommended to choose for using in accordance with the logistical field

    Exotic looped trajectories via quantum marking

    Full text link
    We provide an analytical and theoretical study of exotic looped trajectories (ELTs) in a double-slit interferometer with quantum marking. We use an excited Rydberg-like atom and which-way detectors such as superconducting cavities, just as in the Scully-Englert-Walther interferometer. We indicate appropriate conditions on the atomic beam or superconducting cavities so that we determine an interference pattern and fringe visibility exclusive from the ELTs. We quantitatively describe our results for Rubidium atoms and propose this framework as an alternative scheme to the double-slit experiment modified to interfere only these exotic trajectories.Comment: 10 pages, 5 figure

    Vision Is Adapted to the Natural Level of Blur Present in the Retinal Image

    Get PDF
    Background The image formed by the eye's optics is inherently blurred by aberrations specific to an individual's eyes. We examined how visual coding is adapted to the optical quality of the eye.Methods and Findings We assessed the relationship between perceived blur and the retinal image blur resulting from high order aberrations in an individual's optics. Observers judged perceptual blur in a psychophysical two-alternative forced choice paradigm, on stimuli viewed through perfectly corrected optics (using a deformable mirror to compensate for the individual's aberrations). Realistic blur of different amounts and forms was computer simulated using real aberrations from a population. The blur levels perceived as best focused were close to the levels predicted by an individual's high order aberrations over a wide range of blur magnitudes, and were systematically biased when observers were instead adapted to the blur reproduced from a different observer's eye.Conclusions Our results provide strong evidence that spatial vision is calibrated for the specific blur levels present in each individual's retinal image and that this adaptation at least partly reflects how spatial sensitivity is normalized in the neural coding of blur.This work was supported by the following: Ministerio de Ciencia e Innovación (MICINN), Formación de Personal Investigador (FPI) Predoctoral Fellowship to LS; Consejo Superior de Investigaciones Científicas (CSIC) I3P Predoctoral Fellowship to PdG; EY-10834 to MW; MICINN FIS2008-02065 and EURYI-05-102-ES (European Heads of Research Councils-European Science Foundation EUROHORCs-ESF) to SM. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Peer reviewe

    Mineração em metadados aplicados ao processo de desenvolvimento de coleções

    Get PDF
    The increasing of the new scientific areas, along with the multitude of information items, it's pushing the librarians to find creatively novel ways to gather information for the development of the collection under their responsability. This must definitely change the usual practice of these professionals towards mastering moderns IT tools in order to better analyse a huge volume of data in a shorter amount of time. Hence, this paper discusses a proposal of building metadata of the syllabus plans, within a university to easy the minering some important information out of them as part of a master collection development policy

    TP30 210. Tratamiento de la fibrilación auricular mediante ablación con ultrasonidos concomitante a otra cirugía cardíaca. Resultados a largo plazo en nuestro centro

    Get PDF
    Introducción y objetivosActualmente la ablación quirúrgica de la fibrilación auricular (FA) es un procedimiento simple que puede realizarse en la mayoría de los pacientes durante la cirugía cardíaca. Presentamos nuestros resultados a largo plazo en ablación con ultrasonidos.Pacientes y métodosEn 23 pacientes con diferentes afecciones quirúrgicas cardíacas y FA (12 pacientes con FA permanente, 2 con FA persistente, 7 con FA paroxística, 1 paciente con fibrilo-flutter y un paciente con flutter auricular aislado), se asoció la ablación con ultrasonidos con el dispositivo UltraCinch™ Epicor, durante 2007–2008. El tamaño preoperatorio por ecocardiografía (ECO) de la aurícula izquierda (AI) fue de 45mm (rango 34–55). En un paciente no pudo realizarse por fallo de la consola.ResultadosNo hubo mortalidad intrahospitalaria. Un paciente precisó un marcapasos definitivo. Dos casos registrados de accidente cerebrovascular (ACV). Tras el procedimiento el 63,6% de los pacientes recuperó el ritmo sinusal, bajando al 54% de los pacientes en el momento del alta. A los 6 meses el 63% de los pacientes se encontraban en ritmo sinusal (RS) y a los 12 meses el 68%. Tras un seguimiento de 4 años obtenemos que sólo el 45% de los pacientes mantiene el RS, de los cuales el 20% tiene episodios de FA paroxística.ConclusiónLa ablación mediante ultrasonidos (US) de la FA es un procedimiento sencillo, reproducible y seguro, siendo su efectividad a corto y medio plazo similar a la de otros procedimientos de ablación. En nuestra corta serie, su eficacia a largo plazo disminuye significativamente
    • …
    corecore