Espècie nova del gènere Moitessieria (Gastropoda: Moitessieriidae) per a Catalunya, Espanya

A new species of the genus Moitessieria Bourguignat, 1863 from Catalonia (Spain) is described, found in sediments from a spring in Sant Joan les Fonts (Girona). The new species is compared with other congeneric species from which it conchologically differs.Es descriu una espècie nova del gènere Moitessieria Bourguignat, 1863 per a Catalunya (Espanya), trobada en sediments procedents d’una font a Sant Joan les Fonts (Girona). L’espècie nova es diferencia de les altres espècies conegudes del gènere per diferents caràcters conquiliològics

Spiralix tuba (Gastropoda: Moitessieriidae) espècie nova d’Espanya

A new species of the genus Spiralix is described from the Pobla de Benifassà (Spain), which can be conchologically differentiated from the known congeneric species by having a smaller number of whorls and a wider aperture.Es descriu una espècie nova del gènere Spiralix de la Pobla de Benifassà (Espanya), la qual es diferencia conquiològicament de les altres espècies del gènere conegudes per tenir poques voltes i una obertura ampla

The BTZ black hole as a Lorentz-flat geometry

It is shown that 2+1 dimensional anti-de Sitter spacetimes are Lorentz-flat. This means, in particular, that any simply-connected patch of the BTZ black hole solution can be endowed with a Lorentz connection that is locally pure gauge. The result can be naturally extended to a wider class of black hole geometries and point particles in three-dimensional spacetime.Comment: 2 page

Nova espècie del gènere Spiralix (Gastropoda: Moitessieriidae) per a Espanya

A new species of the genus Spiralix is described for the province of Castelló (Spain), which differs conchologi-cally from other known species in this genus. This geographical area is a hotspot for this genus, given the high number of endemic taxa already described.Es descriu una espècie nova del gènere Spiralix per a la província de Castelló (Espanya), la qual es diferencia conquiliològicament de les altres espècies del gènere conegudes. Aquesta zona geogràfica és un punt calent de diversitat del gènere, donada l’elevada quantitats de tàxons endèmics descrits

A Variational Approach to 3D Cylindrical Geometry Reconstruction from Multiple Views

In this paper we present a variational technique for the reconstruction of 3D cylindrical surfaces. Roughly speaking by a cylindrical surface we mean a surface that can be parameterized using the projection on a cylinder in terms of two coordinates, (l, ?), representing the displacement and angle in a cylindrical coordinate system respectively. The starting point for our method is a set of different views of a cylindrical surface, as well as a precomputed disparity map estimation between pair of images. The proposed variational technique is based on an energy minimization where we balance on the one hand the regularity of the cylindrical function given by the distance of the surface points to cylinder axis, and on the other hand, the distance between the projection of the surface points on the images and the expected location following the precomputed disparity map estimation between pair of images. One interesting advantage of this approach is that we regularize the 3D surface by means of a bi-dimensional minimization problem. We show some experimental results for large stereo sequences

Optoelectronic properties of triphenylamine based dyes for solar cell applications. A DFT study

Indexación: Scopus.GSM thanks to the Department of Chemistry at the Universidad Andres Bello, Concepcion, Chile. LHMH gratefully acknowledges financial support from CONACYT (Projects CB2015-257823) and to the Universidad Autónoma del Estado de Hidalgo.Dye-sensitized solar cells (DSSCs) based on triphenylamine (TPA) as a donor group linked with the acceptor cyanoacrylic acid electron acceptor by 2,2'-bithiophene as π-bridged (D-π-A) has been investigated by Density Functional Theory (DFT) at the B3LYP/6-311G(d,p) level of theory, to establish the conformational orientation of cyanoacrylic acid group as well as evaluate the effect of planarizing the 2,2'-bithiophene unit in position 3 and 3' by electron withdrawing or donor groups on the electronic structure properties of ground and doping(n,p) states. Also, the Time Dependent Density Functional Theory (TD-DFT) at the CPCM-TD-CAM-B3LYP//CAM-B3LYP/6-311G(d,p) level of theory were selected to modulate the electronic absorption spectra and charge-transfer capabilities of the molecules analyzed in the present work. The results indicate that adding an auxiliary donor or withdrawing group to the 2,2'-bithiophene in the (D-π-A) arrangement allow to modify the LUMO's energy of the dyes, while the HOMO's energy is slightly affected. © 2018 Sociedade Brasileira de Quimica. All rights reserved.http://quimicanova.sbq.org.br/imagebank/pdf/AR20170232.pd

Epistemic Foundations of Eco-Efficiency and Social Responsibility in Environmental and Business Performance

Currently, the theoretical basis of eco-efficiency in responsible and social development has promoted a philosophy of sustainable and environmental thinking, which is to provide solutions to the imbalance in the company–environment relationship. Thus, this scientific article is presented with the purpose of deepening the importance of eco-efficiency in responsible and social development and strengthening environmental performance. A quantitative–qualitative approach was used. The phenomenological interpretation to respond to environmental problems also describes the theoretical basis in a substantive way. In this sense, the optimization of resources is sought, with the vision of innovation and the commitment of each organization to be responsible for the high levels of pollution. Therefore, it is concluded that business awareness should be promoted, with approaches to mitigate environmental pollution. Thus, it is necessary to have government policies that motivate businessmen to change their relationship with the environment, based on transition and sustainable development for the integral development of the country. It is also necessary to articulate with the educational institutions at all levels to form beings sensitive to the interest and care for the environment. Keywords: eco-efficiency, social responsibility, environmental performance, sustainability. Resumen En la actualidad, las bases teóricas de la ecoeficiencia en el desarrollo responsable y social, ha fomentado una filosofía del pensamiento sostenible y ambiental, que consiste en dar soluciones al desequilibrio en la relación empresa – ambiente, para tal efecto se presenta el artículo científico, con el propósito de profundizar la importancia de ecoeficiencia en el desarrollo responsable y social y fortalecer el performance ambiental, para lo cual se construye desde el enfoque cuantitativo – cualitativo; la interpretación fenomenológica para responder los problemas ambientales; además se describe las bases teóricas de una manera sustantiva. En este sentido se busca la optimización de recursos, con la visión de innovación y el compromiso de cada organización de ser responsable de los altos niveles de contaminación. Por tanto, se concluye que se debe fomentar la conciencia empresarial, con planteamientos para mitigar la contaminación ambiental. Así pues, es necesario que existan políticas gubernamentales que motiven a los empresarios al cambio en la relación con el medio ambiente, con base en la transición y el desarrollo sostenible para el desarrollo integral del país. Ahora también, se debe articular con las instituciones educativas en todos los niveles para formar seres sensibles al interés y cuidado al ambiente. Palabras Clave: ecoeficiencia, responsabilidad social, performance ambiental, sostenibilidad