Cosmological solutions in F(R) Horava-Lifshitz gravity

At the present work, it is studied the extension of F (R) gravities to the new recently proposed theory of gravity, the so-called Horava-Lifshitz gravity, which provides a way to make the theory power counting renormalizable by breaking Lorentz invariance. It is showed that dark energy can be well explained in the frame of this extension, just in terms of gravity. It is also explored the possibility to unify inflation and late-time acceleration under the same mechanism, providing a natural explanation the accelerated expansion.Comment: 4 pages. Contribution to the Proceedings of the Spanish Relativity Meeting (ERE) 2010, Granada, Spai

Testing the equation of state for viscous dark energy

Some cosmological scenarios with bulk viscosity for the dark energy fluid are considered. Based on some considerations related to hydrodynamics, two different equations of state for dark energy are assumed, leading to power-law and logarithmic effective corrections to the pressure. The models are tested with the latest astronomical data from type Ia supernovae (Pantheon sample), measurements of the Hubble parameter HðzÞ, baryon acoustic oscillations and cosmic microwave background radiation. In comparison with the ΛCDM model, some different results are obtained and their viability is discussed. The power-law model shows some modest results, achieved under negative values of bulk viscosity, while the logarithmic scenario provide good fits in comparison to the ΛCDM model.Ministerio de Economía, Industria y Competitividad (project FIS2016-76363-P)Agencia de Gestión de Ayudas Universitarias y de Investigación (project 2017 SGR 247)CANTATA COST action (grant CA15117

Ekpyrotic universes in F(R)F(R) Ho\v{r}ava-Lifshitz gravity

The Ekpyrotic scenario is studied in the context of some extensions of Ho\v{r}ava-Lifshitz gravity. Some particular solutions that lead to cyclic Hubble parameters are analyzed, where the corresponding gravitational actions are reconstructed by using several techniques and auxiliary fields. Its comparison with standard $F(R)$ gravity is performed. In addition, the so-called Little Rip, a stage of the universe evolution when some bounded systems may be dissolute, is also studied in this frame of theories.Comment: 12 pages. Version to be published in PR

An Integrated Framework for Multiprocessor, Multimoded Real-Time Applications

The final publication is available at Springer via http://dx.doi.org/10.1007/978-3-642-30598-6_2In this paper we propose an approach for building real-time systems under a combination of requirements: specification and handling of operating modes and mode changes; implementation on top of a multiprocessor platform; integration of both aspects within a common framework; and connection with schedulability analysis procedures. The proposed approach uses finite state machines to describe operating modes and transitions, and a framework of real-time utilities that implements the required behaviour in Ada 2012. Automatic code generation plays an important role: the system is derived from the functional and timing specification, and implemented according to the abstractions provided by the framework. Response time analysis enables assessing the schedulability of the different operating modes and the transitions between modes.This work was partially supported by the Vicerrectorado de Investigación of the UPV (PAID-06-10-2397), Ministerio de Ciencia e Innovación (TIN2011-28567-C03- 03) and European Union (FP7-ICT-287702)Sáez Barona, S.; Real Sáez, JV.; Crespo, A. (2012). An Integrated Framework for Multiprocessor, Multimoded Real-Time Applications. En Reliable Software Technologies – Ada-Europe 2012. Springer. 18-34. https://doi.org/10.1007/978-3-642-30598-6_21834Wellings, A.J., Burns, A.: A Framework for Real-Time Utilities for Ada 2005. Ada Letters XXVII(2) (August 2007)Real, J., Crespo, A.: Incorporating Operating Modes to an Ada Real-Time Framework. Ada Letters 30(1) (April 2010)Sáez, S., Terrasa, S., Crespo, A.: A Real-Time Framework for Multiprocessor Platforms Using Ada 2012. In: Romanovsky, A., Vardanega, T. (eds.) Ada-Europe 2011. LNCS, vol. 6652, pp. 46–60. Springer, Heidelberg (2011)Joseph, M., Pandya, P.: Finding response times in a real-time system. British Computer Society Computer Journal 29(5), 390–395 (1986)Audsley, N., Burns, A., Richardson, M., Tindell, K., Wellings, A.J.: Applying new scheduling theory to static priority pre-emptive scheduling. Software Engineering Journal 8(5), 284–292 (1993)Real, J., Crespo, A.: Mode Change Protocols for Real-Time Systems: A Survey and a new Proposal. Real-Time Systems 26(2), 161–197 (2004)Harel, D.: Statecharts: A visual formalism for complex systems. The Science of Computer Programming 8(3), 231–274 (1987)Object Management Group: Unified Modeling Language (OMG UML) V2.4 (August 2011), http://www.omg.org/spec/UML/2.4.1Sáez, S., Terrasa, S., Lorente, V., Crespo, A.: Implementing Reactive Systems with UML State Machines and Ada 2005. In: Kordon, F., Kermarrec, Y. (eds.) Ada-Europe 2009. LNCS, vol. 5570, pp. 149–163. Springer, Heidelberg (2009)Burns, A., Wellings, A.J.: Dispatching Domains for Multiprocessor Platforms and their Representation in Ada. In: Real, J., Vardanega, T. (eds.) Ada-Europe 2010. LNCS, vol. 6106, pp. 41–53. Springer, Heidelberg (2010)Barnett, J.: State Chart XML (SCXML): State Machine Notation for Control Abstraction (May 2008), http://www.w3.org/TR/scxml

Entomological fauna associated with Aguaribay : Mendoza (Argentina)

En los relevamientos de especias dañinas y benéficas presentes en el aguaribay (Schinus molle L. var. Areira), para inventariar su entomofauna se efectuaron observaciones en distintas zonas de Mendoza (Argentina) en 1988/91 y 1994/96, confirmando y actualizando la bibliografía. Se recolectó material a campo para su identificación sistemática. Se evaluaron daños y se los documentó fotográficamente. En el laboratorio se conservaron muestras con parasitoides hasta la aparición de adultos para su clasificación, registrándose 8 especies de Homoptera, 7 de Hymenoptera, 7 de Coleoptera, 5 de Lepidoptera, 4 de Diptera, 4 de Thysanoptera, 2 de Hemiptera y 2 de Neuroptera. Las principales especies que afectan al Aguaribay son Calophya sp. (Homoptera - Psyllidae), Ceroplastes grandis (Homoptera - Coccidae) y Aphis schinifoliae (Homoptera - Aphididae). También cuenta con una importante fauna benéfica: coccinélidos, parasitoides, sírfidos y crisópidos.Pest and beneficial species present in Schinus molle L. var. Areira were monitoring in order to obtain an inventory of its entomological fauna. It was made observations in different zones of Mendoza from 1988 to 1991, and then, between 1994 and 1996, it was confirmed further observations and it was brought up to day bibliographical revisions. It was collected material in field in order to made its systematic identification. Damages were evaluated and documented photographically. Samples with parasitoids were stored in laboratory until the appearance of adults for their classification. It was registered: 8 species of Homoptera, 7 of Hymenoptera, 7 of Coleop-tera, 5 of Lepidoptera, 4 of Diptera, 4 of Thysanoptera, 2 of Hemiptera and 2 of Neuroptera. The main pest are: Calophya sp. (Homoptera - Psyllidae), Ceroplastes grandis (Homoptera - Coccidae) and Aphis schinifoliae (Homoptera - Aphididade). Also, there is an important beneficial fauna: Coccinellidae, parasitoids, Syrphidae and Chrysopidae.Fil: Sáez, César C.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: Mácola, Guido S.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: Holgado, Miriam G.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: García Sáez, José G.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias Biológica

Thrips : population dynamics of Thrips tabaci Lind. in garlic (Mendoza, Argentina)

En el presente trabajo se da a conocer la dinámica poblacional de Thrips tabaci (trips del ajo y la cebolla) en cultivos de ajos colorados del departamento de Luján de Cuyo, provincia de Mendoza, verificándose que el máximo pico poblacional expresado en números de individuos por plantas se alcanza en noviembre, con un ascenso rápido que comienza en octubre y un decrecimiento de igual característica en diciembre, en coincidencia con la finalización del ciclo fenológico del cultivo.The actual work give to know the population dynamic of the Trhips tabaci (onions and garlic thrips) in cultivation of “red onions“ in the departament Luján de Cuyo, of the province of Mendoza, preve that the maximum populatin peak expresed in number of individuals per plants is reached in november, with a fast ascension in october and degression of equal characteristcs in december, in coincidence with the end of phenologyc cicle of the cultivation.Fil: García Sáez, José G.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: Mácola, Guido S.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias Biológica

Thin and thick cloud top height retrieval algorithm with the Infrared Camera and LIDAR of the JEM-EUSO Space Mission

The origin of cosmic rays have remained a mistery for more than a century. JEM-EUSO is a pioneer space-based telescope that will be located at the International Space Station (ISS) and its aim is to detect Ultra High Energy Cosmic Rays (UHECR) and Extremely High Energy Cosmic Rays (EHECR) by observing the atmosphere. Unlike ground-based telescopes, JEM-EUSO will observe from upwards, and therefore, for a properly UHECR reconstruction under cloudy conditions, a key element of JEM-EUSO is an Atmospheric Monitoring System (AMS). This AMS consists of a space qualified bi-spectral Infrared Camera, that will provide the cloud coverage and cloud top height in the JEM-EUSO Field of View (FoV) and a LIDAR, that will measure the atmospheric optical depth in the direction it has been shot. In this paper we will explain the effects of clouds for the determination of the UHECR arrival direction. Moreover, since the cloud top height retrieval is crucial to analyze the UHECR and EHECR events under cloudy conditions, the retrieval algorithm that fulfills the technical requierements of the Infrared Camera of JEM-EUSO to reconstruct the cloud top height is presently reported.Comment: 5 pages, 6 figures, Atmohead Conference 201

A Complexity Architecture for Information Technologies: a Three-Year Didactic Experiment

One medium-term strategy for helping in the management of complexity is the introduction of a conceptual complexity component in the very centre of university curricula. In very few areas is the growth of complexity as evident as in the information technologies (ITs), the focus of the work presented in the current paper. We have therefore developed an integrated way of tackling the specific field of information technologies by means of an approach,to complexity. The content of this paper describes the guidelines of our research effort, placing an emphasis on informatics. Concepts of complexity based on the system metaphor have been substantially drawn upon in this exercise and are thus presented in some detail. Also described is a didactic experiment conducted by the author and designed to provide a new and integrating approach to University curricula for future professionals. The students' "discovery" of complexity is the focal point of the experiment. The findings of this effort are encouraging and call for the continuation and expansion of this experiment

Strategies of management for the control of Thrips tabaci Lind. in red garlic

En cultivos de ajo colorado de Luján de Cuyo (Mendoza, Argentina) realizados en 1996/97/98 se compararon tres alternativas de manejo para el control del trips del ajo y la cebolla: a) control químico en tiempos calendarios sin considerar la dinámica poblacional, modalidad del productor b) control químico teniendo en cuenta la dinámica poblacional c) sin tratamientos químicos Los resultados obtenidos no muestran diferencias estadísticamente significativas en los rendimientos del cultivo (p > 0,05) para las condiciones del ensayo y no se recomienda el empleo de tratamientos químicos.In Red Garlic cultivation of Luján de Cuyo (Mendoza, Argentina) carried out during 1996/97/98, were compared three alternatives of management for the control of the onion and garlic Thrips. a) chemical control according calendar treatment proposed by productors b) chemical control according with the dynamical of the population c) without chemical control The results do not shown statistical significant different in yields (p > 0,05) in the field conditions of the essay, for this, we do not recommend the use of chemical treatment.Fil: García Sáez, José G.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: Mácola, Guido S.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: Llera, Joaquín. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Biomatemática y Fisicoquímic

Vacuum type I spacetimes and aligned Papapetrou fields: symmetries

We analyze type I vacuum solutions admitting an isometry whose Killing 2--form is aligned with a principal bivector of the Weyl tensor, and we show that these solutions belong to a family of type I metrics which admit a group $G_3$ of isometries. We give a classification of this family and we study the Bianchi type for each class. The classes compatible with an aligned Killing 2--form are also determined. The Szekeres-Brans theorem is extended to non vacuum spacetimes with vanishing Cotton tensor.Comment: 19 pages; a reference adde