4,113 research outputs found

    Nematodes of the order Dorylaimida from Andalucia oriental, Spain : the family Tylencholaimellidae Jairajpuri, 1964. Part 1

    Get PDF
    Le présent article a trait à cinq espèces de nématodes appartenant au genre #Tylencholaimellus Cobb in M. V. Cobb, 1915 collectés dans des sites naturels du sud-est de l'Espagne : #T. auringiensis Peralta & Pena Santiago, 1992, #T. minor n. sp., #T. montanus Thorne, 1939, #T. polonicus Szczygiel, 1962 et #T. striatus Thorne, 1939. A l'exception de #T. auringiensis, toutes les espèces sont décrites et illustrées. #T. minor n. sp. présente les caractéristiques suivantes : petite taille (L = 0,46-0,59 micromètres); région labiale hémisphérique séparée par une constriction; lèvres fusionnées; odontostyle = 11,5-12,5 micromètres; odontophore = 4,5-5,5 micromètres; longueur totale du stylet = 16,5-18 micromètres; bulbe pharyngien = 22-25 micromètres; V = 31,6-36,9; vagin précédé par une cavité en forme d'entonnoir; sac prévulvaire = 47-70 micromètres ou 2,3-3,1 diamètres du corps; queue arrondie-conoïde (15,5-17,5 micromètres, c = 27,3-33,9; c' = 1,0-1,4 chez les femelles et 20-21 micromètres, c = 24,3-28,4, c' = 1,40-1,45 chez les mâles); spicules = 20-21 micromètres; un seul supplément ventro-médian. (Résumé d'auteur

    Nematodes of the order Dorylaimida from Andalucia oriental, Spain : the family Tylencholaimellidae Jairajpuri, 1964. Part 2

    Get PDF
    Le présent article traite de six espèces de nématodes appartenant à la famille des #Tylencholaimellidae Jairajpuri, 1964 collectées dans des sites naturels du sud-est de l'Espagne : #Tylencholaimellus cinctus Orr & Dikerson, 1965, #T. loofi Pena Santiago, Peralta & Siddiqi, 1993, #T. paracinctus sp. n., #T. raskii Jairajpuri & Siddiqi, 1963, #Margollus hispanicus (Pena Santiago & Coomans, 1990) Pena Santiago, Peralta & Siddiqi, 1993 et #Doryllium labiatum Andrassy, 1987. A l'exception de #T. loofi et de #M. hispanicus, ces espèces sont décrites et illustrées. #T. paracinctus sp. n. est caractérisé par : taille petite (L = 0,65-0,86 micromètres; région labiale quelque peu anguleuse et séparée par une constriction; odontostyle = 6,5-9,0 micromètres (stylet total = 17,5-20,5 micromètres); V = 32,6-41,7; sac prévulvaire = 23-80 micromètres (0,9-2,8 diam. du corps); queue conique à l'extrémité arrondie (20,5-30 micromètres, c = 26,9-43,4, c' = 1,05-1,56 chez la femelle et 20-23 micromètres, c = 31,7-37,7, c' = 1,0-1,3 chez le mâle); spicules = 26-29 micromètres; un seul supplément ventro-médian. (Résumé d'auteur

    Nematodes of the order Dorylaimida from Andalucia oriental, Spain : the families Leptonchidae Thorne, 1935 and Aulolaimoididae Jairajpuri, 1964

    Get PDF
    Ce sixième article de la série sur les nématodes Leptonchides d'Andalousie orientale (Espagne du sud-est) traite de huit espèces déjà décrites appartenant à six genres différents : #Adenolaimus (#Leptonchidae), #Basirotyleptus, #Funaria, #Leptonchus, #Proleptonchus et #Meylis (#Aulolaimoididae). A l'exception des deux espèces de #Funaria$, les descriptions, mensurations et illustrations du matériel étudié sont données. Quatre espèces sont nouvelles pour la faune européenne. (Résumé d'auteur

    The genus Dorylaimoides Thorne and Swanger, 1936 (Nematoda : Dorylaimida) : 1. Taxonomy and variability

    Get PDF
    Une révision générale des différents aspects de la morphologie et de la taxonomie du genre #Dorylaimoides$ Thorne et Swanger, 1936 est présentée. La variabilité des caractéristiques morphologiques est décrite et illustrée, et leur valeur taxonomique est discutée brièvement. La position taxonomique du genre, ses relations avec d'autres genres et la taxonomie intragénérique sont également traitées. Une liste des espèces est donnée. (Résumé d'auteur

    A first step to accelerating fingerprint matching based on deformable minutiae clustering

    Get PDF
    Fingerprint recognition is one of the most used biometric methods for authentication. The identification of a query fingerprint requires matching its minutiae against every minutiae of all the fingerprints of the database. The state-of-the-art matching algorithms are costly, from a computational point of view, and inefficient on large datasets. In this work, we include faster methods to accelerating DMC (the most accurate fingerprint matching algorithm based only on minutiae). In particular, we translate into C++ the functions of the algorithm which represent the most costly tasks of the code; we create a library with the new code and we link the library to the original C# code using a CLR Class Library project by means of a C++/CLI Wrapper. Our solution re-implements critical functions, e.g., the bit population count including a fast C++ PopCount library and the use of the squared Euclidean distance for calculating the minutiae neighborhood. The experimental results show a significant reduction of the execution time in the optimized functions of the matching algorithm. Finally, a novel approach to improve the matching algorithm, considering cache memory blocking and parallel data processing, is presented as future work.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

    Gravitational radiation from pulsar glitches

    Full text link
    The nonaxisymmetric Ekman flow excited inside a neutron star following a rotational glitch is calculated analytically including stratification and compressibility. For the largest glitches, the gravitational wave strain produced by the hydrodynamic mass quadrupole moment approaches the sensitivity range of advanced long-baseline interferometers. It is shown that the viscosity, compressibility, and orientation of the star can be inferred in principle from the width and amplitude ratios of the Fourier peaks (at the spin frequency and its first harmonic) observed in the gravitational wave spectrum in the plus and cross polarizations. These transport coefficients constrain the equation of state of bulk nuclear matter, because they depend sensitively on the degree of superfluidity.Comment: 28 page

    Superfluid spherical Couette flow

    Full text link
    We solve numerically for the first time the two-fluid, Hall--Vinen--Bekarevich--Khalatnikov (HVBK) equations for a He-II-like superfluid contained in a differentially rotating, spherical shell, generalizing previous simulations of viscous spherical Couette flow (SCF) and superfluid Taylor--Couette flow. In axisymmetric superfluid SCF, the number of meridional circulation cells multiplies as \Rey increases, and their shapes become more complex, especially in the superfluid component, with multiple secondary cells arising for \Rey > 10^3. The torque exerted by the normal component is approximately three times greater in a superfluid with anisotropic Hall--Vinen (HV) mutual friction than in a classical viscous fluid or a superfluid with isotropic Gorter-Mellink (GM) mutual friction. HV mutual friction also tends to "pinch" meridional circulation cells more than GM mutual friction. The boundary condition on the superfluid component, whether no slip or perfect slip, does not affect the large-scale structure of the flow appreciably, but it does alter the cores of the circulation cells, especially at lower \Rey. As \Rey increases, and after initial transients die away, the mutual friction force dominates the vortex tension, and the streamlines of the superfluid and normal fluid components increasingly resemble each other. In nonaxisymmetric superfluid SCF, three-dimensional vortex structures are classified according to topological invariants.Comment: Accepted for publication in the Journal of Fluid Mechanic

    Hydrophobic cellulose-based and non-woven fabrics coated with mesoporous TiO2 and their virucidal properties under indoor light

    Get PDF
    Antiviral hydrophobic cellulose-based cotton or non-woven fabrics containing mesoporous TiO2 particles were developed for potential use in healthcare and in other contaminated environments. Hydrosols made with the sol-gel method using two different amounts of the Ti precursor were applied to cotton and non-woven fabrics and their virucidal effect on Murine Coronavirus (MHV-3) and Human Adenovirus (HAdV-5) was evaluated under indoor light irradiation. The results show 90% reduction of HAdV-5 and up to 99% of MHV-3 in non-woven fabric, and 90% reduction of MHV-3 and no reduction of HAdV-5 in cotton fabric. The antiviral activity was related to the properties of the TiO2 powders and coatings characterized by BET surface area, DRX, DLS, FTIR, DRS, SEM, TEM and water contact angle. The hydrophobic characteristic of the treated fabrics and the high surface area of the TiO2 particles favor interaction with the virus, especially MHV-3. These results demonstrate that non-woven fabric and cotton, coated with TiO2, can be highly effective in preventing contamination with MHV-3 and HAdV-5 viruses, particularly for applications in healthcare indoor environments
    • …
    corecore