87,327 research outputs found
Platyrrhinus chocoensis Alberico & Velasco 1991
No full text<i>Platyrrhinus chocoensis</i> Alberico & Velasco, 1991 <p>Alberico, M.S. & Velasco, E. (1991) Description of a new broad-nosed bat from colombia. Bonner zoologische Beiträge, 42: 238 [237–239].</p> <p> Valid name: <i>Platyrrhinus chocoensis</i> Alberico & Velasco, 1991</p> <p>Paratype: ZMB 84830, skin and skull, male; Bajo Calima Pulpapel, Colombia; collected by Gamboa, 27 February 1986.</p>Published as part of <i>Turni, Hendrik & Kock, Dieter, 2008, Type specimens of bats (Chiroptera: Mammalia) in the collections of the Museum f r Naturkunde, Berlin, pp. 1-82 in Zootaxa 1869 (1)</i> on page 47, DOI: 10.11646/zootaxa.1869.1.1, <a href="http://zenodo.org/record/5133648">http://zenodo.org/record/5133648</a>
Platyrrhinus chocoensis Alberico and Velasco 1991
No full text<p> <i>Platyrrhinus chocoensis</i> Alberico and Velasco, 1991. Bonn. zool. Beitr., 42:238.</p> <p>TYPE LOCALITY: "Quebrada El Platinerò, 12 km W Istmina (by road), 5°00' N, 76°45' W, 100 m, Departamento del Chocó, Colombia."</p> <p>DISTRIBUTION: W Colombia, lowlands between the Western Cordillera of the Andes and the Pacific coast.</p>Published as part of <i>Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press</i> on page 190, DOI: <a href="http://zenodo.org/record/7353060">10.5281/zenodo.7353060</a>
An eigenvalue problem for the anisotropic Φ-Laplacian
No full textWe study an eigenvalue problem involving a fully anisotropic elliptic differential operator in arbitrary Orlicz-Sobolev spaces. The relevant equations are associated with constrained minimization problems for integral functionals depending on the gradient of competing functions through general anisotropic N-functions. In particular, the latter need neither be radial, nor have a polynomial growth, and are not even assumed to satisfy the so called Δ2-condition. The resulting analysis requires the development of some new aspects of the theory of anisotropic Orlicz-Sobolev spaces
Orbit design of satellite quantum key distribution constellations in different ground station networks
No full textIn the field of Cryptography, Quantum Key Distribution (QKD) is an application of Quantum Information theory that obtained a
great deal of attention in recent years. It allows to establish secret keys between two or more parties, in a much safer way than that implemented
by classic cryptography (based on discrete logarithms and factorization of prime numbers). The most promising way of realizing
a QKD network (especially over great distances) in the near future is by a constellation of satellites. This paper considers the problem of
optimizing the orbits of the satellites in order to maximize the minimum key length shared in a network of ground stations over a fixed
amount of time. Different networks of stations are considered and the influence of their geographical disposition on the design and the
performance index is highlighted. The networks considered are: a global constellation, a regional European constellation, and two in
which there are groups of stations in two different narrow bands of latitude. The effect of Inter-satellite links is then taken into account
and how, in some cases, they can improve the performances. Finally the daily performance of the considered constellations are analyzed
PDC-BuilD framework: Assessing building damage probability for pyroclastic currents of a small-size explosive eruption at Campi Flegrei (Southern Italy)
No full textA methodology for the evaluation of damage that the buildings exposed to pyroclastic currents from a possible small-size eruption at Campi Flegrei could suffer is proposed. It was implemented in a structured GIS framework named BuilD (Building Damage) that integrates spatial and no-spatial data and allows to quantify and map the differences in building composition of censual districts and the damage they could undergo. BuilD uses the fragility curves to assess the damage at censual district scale and requires as input data the building features (ISTAT data and Google Earth images) and the dynamic pressure exerted by Pyroclastic Density Currents. 16 maps of percentage probability of exceeding a damage threshold resulting from 4 increasing damage levels by an eruption occurring at 4 hypothetical volcanic vents were drawn. In the single map, five classes (from high to very low) depict the spatial distribution of potential harms that the built environment could suffer. The methodology is implemented for the knowledge of the current status of the built environment; it can be easily managed also by non-technical stakeholders, exported in areas with similar requirements and profitably used for other hazards. The BuilD frame is scalable to larger areas at risk, keeping the censual districts, available for the whole European territory, as the minimum territorial reference units, useful for comparisons of building damages at regional scale. The produced maps can be used for addressing available funds to ameliorate the structural features of the buildings and to support local authorities in better land management and land use
Living coccolithophore communities in the central Mediterranean Sea (Summer 2016). Relations between ecology and oceanography
No full textCoccolithophores were collected at 21 stations during summer 2016, from coastal and offshore areas of the
Central Mediterranean Sea, to describe the ecology of the coccolithophore community integrating information on
their abundance, environmental parameters (salinity, temperature, dissolved oxygen, and fluorescence) and
oceanographic data. Emiliania huxleyi dominated the assemblage from surface to intermediate layers, while
Florisphaera profunda was more abundant in the deep photic zone. Principal Component Analysis revealed that
the distribution of coccolithophore taxa was influenced by environmental parameters: K-strategist taxa were
related to warm surface waters, whereas lower photic zone taxa were influenced by the development of a Deep
Chlorophyll Maximum and high salinity values, well below the thermocline. These results confirmed that a
vertical species zonation, as a typical feature of low-middle latitude, characterizes the Central Mediterranean
during summer. The distribution of F. profunda once again confirmed its use as a proxy of Deep Chlorophyll
Maximum development and paleoproductivity estimates. Gephyrocapsa spp. (=total Gephyrocapsa), and in
particular G. oceanica, were more abundant along the Atlantic Water pathway. Finally, the high concentration
value of Helicosphaera carteri, recorded in the Ligurian Sea at an offshore station, suggested an expansion of the
opportunist nature of this taxon from coastal environments to the offshore areas characterized by high turbidity
and high productivity
Estimates for fully anisotropic elliptic equations with a zero order term
No full textIntegral estimates for weak solutions to a class of Dirichlet problems for nonlinear, fully anisotropic, elliptic equations with a zero order term are obtained by symmetrization techniques. The anisotropy of the principal part of the operator is governed by a general n-dimensional Young function of the gradient which is not necessarily of polynomial type and need not satisfy the Δ2-condition
Distribution of Benthic Foraminiferal Assemblages on the Southern Campanian Continental Shelf
No full textFotografia del dottor Alberico Benedicenti con dedica a Federico Kiesow
No full textFotografia del dottor Alberico Benedicenti, collaboratore di Angelo Mosso, mentre utilizza il miotonometro, apparecchio scientifico atto a misurare il tono muscolare e le contrazioni dei muscoli volontari. - Formato del documento analogico: 1 fotografia : b/n incollata su cartoncino ; 15,8 x 21,3 cm. - con profilo e sigla a stampa F. A. G., 25,9 x 36 cm. - Dedica manoscritta "Il dottor Benedicenti al dottor Kiesow / in segno di affettuoso ricordo / Torino, 12 aprile 1894". - sulla fotografia in basso a sinistra "P.
Estimates for solutions to anisotropic elliptic equations with zero order term
No full textEstimates for solutions to homogeneous Dirichlet problems for a class of elliptic equations with zero order term in the form L(u) = g(x, u) + f (x),where the operator L fulfills an anisotropic elliptic condition, are established. Such estimates are obtained in terms of solutions to suitable problems with radially symmetric data, when no sign conditions on g are required
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