Voting in small networks with cross-pressure

We present a model of participation in elections in small networks, in which citizens su¤er from cross-pressures if voting against the alternative preferred by some of their social contacts. We analyze how the existence of cross-pressures may shape voting decisions, and so, political outcomes; and how candidates may exploit this e¤ect to their interest.Network; Voting; Cross-Cutting.

Bounded Confidence under Preferential Flip: A Coupled Dynamics of Structural Balance and Opinions

In this work we study the coupled dynamics of social balance and opinion formation. We propose a model where agents form opinions under bounded confidence, but only considering the opinions of their friends. The signs of social ties -friendships and enmities- evolve seeking for social balance, taking into account how similar agents' opinions are. We consider both the case where opinions have one and two dimensions. We find that our dynamics produces the segregation of agents into two cliques, with the opinions of agents in one clique differing from those in the other. Depending on the level of bounded confidence, the dynamics can produce either consensus of opinions within each clique or the coexistence of several opinion clusters in a clique. For the uni-dimensional case, the opinions in one clique are all below the opinions in the other clique, hence defining a "left clique" and a "right clique". In the two-dimensional case, our numerical results suggest that the two cliques are separated by a hyperplane in the opinion space. We also show that the phenomenon of unidimensional opinions identified by DeMarzo, Vayanos and Zwiebel (Q J Econ 2003) extends partially to our dynamics. Finally, in the context of politics, we comment about the possible relation of our results to the fragmentation of an ideology and the emergence of new political parties.Comment: 8 figures, PLoS ONE 11(10): e0164323, 201

Logic Negation with Spiking Neural P Systems

Nowadays, the success of neural networks as reasoning systems is doubtless. Nonetheless, one of the drawbacks of such reasoning systems is that they work as black-boxes and the acquired knowledge is not human readable. In this paper, we present a new step in order to close the gap between connectionist and logic based reasoning systems. We show that two of the most used inference rules for obtaining negative information in rule based reasoning systems, the so-called Closed World Assumption and Negation as Finite Failure can be characterized by means of spiking neural P systems, a formal model of the third generation of neural networks born in the framework of membrane computing.Comment: 25 pages, 1 figur

Modelo de negocio y estrategia editorial: el caso del wsj.com

La investigación sobre modelos de negocios en la industria de la comunicación se ha caracterizado por un elevado grado de experimentación y la ausencia de respuestas unívocas al problema de la rentabilidad de los contenidos digitales. En este escenario, The Wall Street Journal suele ser mencionado como un referente del modelo de suscripción. Este artículo demuestra empíricamente que el modelo del diario económico más prestigioso del mundo ofrece un modelo híbrido en el que los contenidos gratuitos representan el 73% del total publicado en la portada del wsj.com y analiza cuáles son las características comunes que suelen compartir aquellos contenidos de pago frente a las compartidas por los contenidos gratuitos

Angle-susceptible sensing metasurface in terahertz regime

Trabajo presentado a la 3rd International Conference "Terahertz and Microwave Radiation: Generation, Detection and Applications (TERA 2018)", celebrada en Rusia del 22 al 25 de octubre de 2018Nowadays thin-film coatings and structures are widely used in advanced industrial and scientific ap-plications that makes the tasks of thin-film sensing highly demanded in practice. Last decade, stimulated by progress in terahertz (THz) instrumentation, a keen interest has been attracted to the THz spectral range to develop its potential for detecting and measuring properties of thin films. The THz radiation can be an alternative to visible and IR waves when examining optically opaque coatings. Meanwhile, due to a rela-tively large wavelength λ, the conventional spectro-scopic methods (TDS-, FDS-, FTIR-, BWO-based) are ill-suited for direct characterization of films with the thickness d of about 2−4 orders of magnitude smaller than λ. This problem can be solved with met-amaterials, in particular, with plasmonic metasurfaces (PMSs) [1–5]. The plasmonic resonance exhibits a high sensitivity of its spectral response to the dielec-tric environment due to a strong field localization what makes possible measuring of analyte layers sat-isfying d << λ condition. The traditional approach of THz thin-film sensing with PMSs is based on detecting a frequency shift of the resonance when the analyte is deposited onto the PMS. In this work, we present the idea to substitute THz spectral measurements for tracking the PMS re-sponse at a fixed wavelength upon changing the incidence angle θ of the exciting THz beam. This concept works well for the PMS with a narrowband resonance sensitive to θ. The results of the numerical investigations and experimental study of such PMS designed as a single-layer array of hexagon-shaped annular slots (Fig. 1) with angle-susceptible resonant transmission near 0.85 THz are presented.The work is partially supported by the Russian Foundation for Basic Research (Project #17-32-80039)

Mus308 Processes Oxygen and Nitrogen Ethylation DNA Damage in Germ Cells of Drosophila

The D. melanogaster mus308 gene, highly conserved among higher eukaryotes, is implicated in the repair of cross-links and of O-ethylpyrimidine DNA damage, working in a DNA damage tolerance mechanism. However, despite its relevance, its possible role on the processing of different DNA ethylation damages is not clear. To obtain data on mutation frequency and on mutation spectra in mus308 deficient (mus308−) conditions, the ethylating agent diethyl sulfate (DES) was analysed in postmeiotic male germ cells. These data were compared with those corresponding to mus308 efficient conditions. Our results indicate that Mus308 is necessary for the processing of oxygen and N-ethylation damage, for the survival of fertilized eggs depending on the level of induced DNA damage, and for an influence of the DNA damage neighbouring sequence. These results support the role of mus308 in a tolerance mechanism linked to a translesion synthesis pathway and also to the alternative end-joinig system

Solving the 3-COL Problem by Using Tissue P Systems without Environment and Proteins on Cells

The 3-COL problem consists on deciding if the regions of a map can be coloured with only three colors bearing in mind that two adjacent regions must be coloured with di erent colors. It is a NP problem and it has been previously used in complexity studies in membrane computing to check the ability of a model for solving problems of such complexity class. Recently, tissue P systems with proteins on cells have been presented and its ability to solve NP-problems has been proved, but it remained as an open question to know if such model was still able to solve such problems if the environment was removed. In this paper we provide an a rmative answer to this question by showing a uniform family of tissue P systems without environment and with proteins on cells which solves the 3-COL problem in linear time

La Red de Ciencia y Tecnología para la Conservación del Patrimonio Cultural como plataforma de colaboración

13 páginas, 15 referencias.-- Jornada celebrada los días 24-25 de mayo de 2012, en el contexto de la VIII Bienal de la Restauración y Gestión del Patrimonio AR&PA 2012, en Valladolid.-- Las Jornadas Técnicas Arespa-Investigación y Empresa, han sido promovidas por la Delegación del CSIC en Castilla y León, la Red de Ciencia y Tecnología para la Conservación del Patrimonio Cultural (TechoHeritage) y la Asociación Española de Empresas de Restauración del Patrimonio Histórico (Arespa).El carácter multidisciplinar de la investigación en conservación del patrimonio cultural hace especialmente adecuado y necesario el establecimiento de redes que pongan en contacto y permitan la colaboración de los distintos actores implicados: universidades, centros de investigación, instituciones culturales y empresas. Con este fin, se creó en 2011 la Red TechnoHeritage (Red de Ciencia y Tecnología para la Conservación del Patrimonio Cultural), con la financiación del Ministerio de Economía y Competitividad. TechnoHeritage aglutina en la actualidad a 80 grupos de los ámbitos citados. En la presente publicación se presentan los orígenes de la Red, las motivaciones para su puesta en marcha, los objetivos que se pretenden alcanzar y algunas de las actividades que se han llevado a cabo.Al Ministerio de Economía y Competitividad por la financiación de la Red dentro del Programa de Acciones Complementarias del Plan Nacional de I+D+i 2008-2011 (HAR2010-11432-E).Peer reviewe