Pipeline-Based Power Reduction in FPGA Applications

This paper shows how temporal parallelism has an important role in the power dissipation reduction in the FPGA field. Glitches propagation is blocked by the flip-flops or registers in the pipeline. Several multiplication structures are implemented over modern FPGAs, StratixII and Virtex4, comparing their results with and without pipeline and hardware duplication

Solving Sudoku with Membrane Computing

Sudoku is a very popular puzzle which consists on placing several numbers in a squared grid according to some simple rules. In this paper we present an efficient family of P systems which solve sudokus of any order verifying a specific property. The solution is searched by using a simple human-style method. If the sudoku cannot be solved by using this strategy, the P system detects this drawback and then the computations stops and returns No. Otherwise, the P system encodes the solution and returns Yes in the last computation step.Ministerio de Ciencia e Innovación TIN2008-04487-EMinisterio de Ciencia e Innovación TIN2009–13192Junta de Andalucía P08-TIC-0420

Uso de sistemas de control de versiones en el seguimiento continuo del trabajo del alumno

El seguimiento continuo del trabajo del alumno suele ser complicado cuando se trata prácticas de desarrollo de software. Además de ser tedioso y de difícil realización, puede ser una tarea considerablemente larga cuando el número de alumnos es elevado. En este trabajo se propone una combinación de técnicas, basadas en la utilización de un sistema de control de versiones, para hacer posible este seguimiento incluso con un número alto de alumnos.Peer Reviewe

Desarrollo del ápice de tallo de la cebada: efecto de la quinetina

The effect of kinetin applied to barley plants (Hordeum distichon L. cv. Pallas) via their roots on the number of primordial spikelets on the shoot apex and its development both in long (16h) and short (10h) photoperiods has been studied. Kinetin has no statistically significant effect on the number of primordial spikelets on the main stem when applied under long photoperiod conditions although it does resuIt in a slight increase in the short photoperiod. As far the development of the main stem itself, all the concentrations assayed enhanced its growth, although only 10-5 M in worked out to be statistically significant.Se ha estudiado el efecto de la quinetina aplicada por vía radical a plantas de cebada (Hordeum distichon L. cv. Pallas), sobre el número de primordios producidos por el ápice del tallo principal y sobre su desarrollo, tanto en condiciones de fotoperiodo largo (16h) como corto (10h). Los resultados muestran que la quinetina no tiene un efecto significativo sobre el número de primordios cuando se aplica en condiciones de día largo, aunque en condiciones de día corto si incrementa este parámetro. Respecto al desarrollo del ápice; todas las concentraciones ensayadas aumentan su velocidad de desarrollo con respecto a las plantas control, si bien, sólo el nivel 10-5 M fue estadísticamente significativo

Alteraciones en la biomosa de plantas de cebada en respuesta a diferentes reguladores del crecimiento

The effects of gibberellic acid, kinetin, abscisic acid and ethrel on the biomass of barley plants (Hordeum distichon L. cv. Pallas) during the preanthesis period has been observed. The various treatments were applied via the roots and two photoperiods (10 and 16h) were experimented with. Ethrel produced the highest increases under both photoperiod conditions, followed by gibberellic acid in the short photoperiod. Abscisic acid enhanced growth slightly under both conditions. Kinetin, under both photoperiod conditions, and gibberellic acid in the long photoperiod provoked a fall in plant growth.Se han estudiado los efectos del ácido giberélico, quinetina, ácido abscísico y ethrel sobre la biomasa de plantas de cebada (Hordeum distichon L. cv. Pallas) durante el periodo de preantesis. Los diferentes tratamientos fueron aplicados por vía radical y el cultivo se llevó a cabo bajo dos diferentes condiciones de fotoperiodo (10h y 16h.). El ethrel produjo los mayores incrementos bajo ambas condiciones de fotoperiodo, seguido del ácido giberélico en condiciones de día corto. El ácido abscísico aumentó ligeramente el crecimiento en los dos experimentos efectuados. La quinetina, tanto con día largo como corto y el ácido giberélico con fotoperiodo largo provocaron una disminución de la cosecha biológica

Alteraciones en la biomosa de plantas de cebada en respuesta a diferentes reguladores del crecimiento

Se han estudiado los efectos del ácido giberélico, quinetina, ácido abscísico y ethrel sobre la biomasa de plantas de cebada (Hordeum distichon L. cv. Pallas) durante el periodo de preantesis. Los diferentes tratamientos fueron aplicados por vía radical y el cultivo se llevó a cabo bajo dos diferentes condiciones de fotoperiodo (10h y 16h.). El ethrel produjo los mayores incrementos bajo ambas condiciones de fotoperiodo, seguido del ácido giberélico en condiciones de día corto. El ácido abscísico aumentó ligeramente el crecimiento en los dos experimentos efectuados. La quinetina, tanto con día largo como corto y el ácido giberélico con fotoperiodo largo provocaron una disminución de la cosecha biológica.The effects of gibberellic acid, kinetin, abscisic acid and ethrel on the biomass of barley plants (Hordeum distichon L. cv. Pallas) during the preanthesis period has been observed. The various treatments were applied via the roots and two photoperiods (10 and 16h) were experimented with. Ethrel produced the highest increases under both photoperiod conditions, foIlowed by gibberellic acid in the short photoperiod. Abscisic acid enhanced growth slightly under both conditions. Kinetin, under both photoperiod conditions, and gibberellic acid in the long photoperiod provoked a fall in plant growth

Oxidative stress is tightly regulated by cytochrome c phosphorylation and respirasome factors in mitochondria

Respiratory cytochrome c has been found to be phosphorylated at tyrosine 97 in the postischemic brain upon neuroprotective insulin treatment, but how such posttranslational modification affects mitochondrial metabolism is unclear. Here, we report the structural features and functional behavior of a phosphomimetic cytochrome c mutant, which was generated by site-specific incorporation at position 97 of p-carboxymethyl-l-phenylalanine using the evolved tRNA synthetase method. We found that the point mutation does not alter the overall folding and heme environment of cytochrome c, but significantly affects the entire oxidative phosphorylation process. In fact, the electron donation rate of the mutant heme protein to cytochrome c oxidase, or complex IV, within respiratory supercomplexes was higher than that of the wild-type species, in agreement with the observed decrease in reactive oxygen species production. Direct contact of cytochrome c with the respiratory supercomplex factor HIGD1A (hypoxia-inducible domain family member 1A) is reported here, with the mutant heme protein exhibiting a lower affinity than the wild-type species. Interestingly, phosphomimetic cytochrome c also exhibited a lower caspase-3 activation activity. Altogether, these findings yield a better understanding of the molecular basis for mitochondrial metabolism in acute diseases, such as brain ischemia, and thus could allow the use of phosphomimetic cytochrome c as a neuroprotector with therapeutic applications.España, Junta de Andalucía BIO-198España MINECO BFU2015-71017/BM

Two new species of Myotis (Chiroptera: Vespertilionidae) for Argentina

Seven new species of Myotis have been recently described from South America, elevating to 20 the total number of species of the genus recognized for the region. Myotis izecksohni and Myotis lavali were recently described from the States of Río de Janeiro, Paraná and Pernambuco, Brazil. These are clearly different from all other known species of the genus in their external and cranial characters, which are exactly comparable with our specimens collected in Argentina. This allows to greatly expand the known geographic distributions for these two species. The addition to Argentina of Myotis lavali with specimens collected in the Yungas ecoregion of Salta Province, and Myotis izecksohni with specimens collected in the Fields and Weedlands ecoregion of Misiones Province, increases the known ecoregions to date for the distribution of the two species.Facultad de Ciencias Naturales y Muse

Dielectric susceptibility of the Coulomb-glass

We derive a microscopic expression for the dielectric susceptibility X of a Coulomb glass, which corresponds to the definition used in classical electrodynamics, the derivative of the polarization with respect to the electric field. The fluctuation–dissipation theorem tells us that is a function of the thermal fluctuations of the dipole moment of the system. We calculate X numerically for three–dimensional Coulomb glasses as a function of temperature and frequency.We acknowledge financial support from the DGES project number PB96-1118, SMWK, and DFG (SFB 393). A great part of this work was performed during A. D.-S.’s visit at the IFW Dresden; A. D.-S. thanks the IFW for its hospitality