Cumulative individual seed production in the polycarpic Caesalpinia gilliesii (Fabaceae): effects of temporal variability in floral display, plant density and pollination

In polycarpic species, floral display size and density of conspecific neighbours are time variable as well as their effects on pollination and fecundity. Here, we address how individual pollinator-dependent seed production responds to changes in floral display size and the density of flowering conspecific neighbours. Using path analysis, we disentangle the partial effects of floral display size, the density of flowering neighbours and pollination intensity on the total seed output of the partially self-compatible shrub Caesalpinia gilliesii during three consecutive reproductive seasons. We also modelled the effects of temporal variability in floral offer and pollination intensity (as the coefficient of variation) on cumulative seed production over the study period. Floral display size had either positive or negative effects on pollination intensity in different reproductive seasons, but conspecific density had no significant effect within each season. However, cumulative seed production increased under lower temporal variability in conspecific density. Our results suggest that, because of the dynamic nature of floral offer in a polycarpic species, the temporal changes in floral display size and density may counteract each other reducing the risk of successive pollination failures and increasing seed production over time.Fil: Calviño, Ana Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; ArgentinaFil: Ashworth, Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; ArgentinaFil: Galetto, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentin

Neutron capture cross section measurements of 238U, 241Am and 243Am at n_TOF

Proposal: Neutron capture cross section measurements of 238U, 241Am and 243Am at n_TOFThe increase of the world energy demand and the need of low carbon energy sources have triggered the renaissance and/or enhancement of nuclear energy in many countries. Fundamental nuclear physics can contribute in a practical way to the sustainability and safety of the nuclear energy production and the management of the nuclear waste. There exists a series of recent studies which address the most relevant isotopes, decay data, nuclear reaction channels and energy ranges which have to be investigated in more detail for improving the design of different advanced nuclear systems [1] and nuclear fuel cycles [2]. In this proposal, we aim at the measurement of the neutron capture cross sections of 238U, 241Am and 243Am. All three isotopes are listed in the NEA High Priority Request List [37], are recommended for measurements [1] and play an important role in the nuclear energy production and fuel cycle scenarios. The measurements will provide as well valuable nuclear structure data necessary for the improvement of nuclear models and the statistical interpretation of the nuclear propertiesPostprint (author's final draft

Numerical study of three-dimensional effects on fluidic oscillators.

Se estudiará el fllujo en el interior de osciladores fluídicos mediante el uso de un código comercial de Mecánica de Fluidos Computacional, prestando especial atención a los efectos tridimensionales.1. Documentación y estudio del estado del arte.2. Aprendizaje de los conceptos básicos de la Mecánica de Fluidos Computacional.3. Aprendizaje del software ANSYS-FLUENT.4. Mallado tridimensional del oscilador fluídico de referencia.5. Lanzamiento de las simulaciones.7. Extracción y análisis de resultados, comparándolos con los resultados obtenidos en simulaciones bidimensionales.8. Conclusiones

Geographical distribution of Austrolebias monstrosus (Huber 1995), A. elongatus (Steindachner 1881) and A. vandenbergi(Huber 1995) (Teleostei: Cyprinodontiformes), with comments on the biogeography and ecology of Rivulidae in Pampasic and Chaco floodplains

After several collecting trips in Argentina and a revision of material deposited in national ichthyological collections we present a new record for Austrolebias elongatus from Gualeguaychú, in Entre Ríos Province, Argentina. Also, we present evidence on the erroneous record of Austrolebias monstrosus, and A. vandenbergi from Ituzaingó, Corrientes Province. Additional records from Salta Province are presented for those species. Material determined as A. elongatus from Santiago del Estero is also attributed to A. monstrosus. Therefore we restrict the distribution of these two species to Semi-arid Chaco Region in Argentina, Paraguay and Bolivia.Fil: Alonso, Felipe. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Calviño, Pablo Andrés. Grupo de Estudio del Killi Club Argentino; ArgentinaFil: Teran, Guillermo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Unidad Ejecutora Lillo. Fundación Miguel Lillo. Unidad Ejecutora Lillo; ArgentinaFil: Garcia, Ignacio Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología "Dr. Raúl A. Ringuelet". Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología; Argentina. Grupo de Estudio del Killi Club Argentino; Argentin

Radiative capture on 242Pu for MOX fuel reactors

Proposal: Radiative capture on 242Pu for MOX fuel reactorsThe use of MOX fuel (mixed-oxide fuel made of UO2 and PuO2) in nuclear reactors allows substituting a large fraction of the enriched Uranium by Plutonium reprocessed from spent fuel. Indeed around 66% of the plutonium from spent fuel is made of 239Pu and 241Pu, which are fissile in thermal reactors. A typical reactor of this type uses a fuel with 7% reprocessed Pu and 93% depleted U, thus profiting from both the spent fuel and the remaining 238U following the 235U enrichment. With the use of such new fuel compositions rich in Pu the better knowledge of the capture and fission cross sections of the Pu isotopes becomes very important. This is clearly stated in the recent OECD NEA’s “High Priority Request List” and in the WPEC-26 “Uncertainty and target accuracy assessment for innovative systems using recent covariance data evaluations” report. In particular, a new series of cross section evaluations have been recently carried out jointly by the European (JEFF) and United States (ENDF) nuclear data agencies. As the new evaluations on 240Pu and 241Am have been already completed, 242Pu is the next to be reevaluated, and the scarceness of capture data (only two TOF measurements from 1973 and 1976 are available and disagree with each other) calls for a new time-of flight capture cross section measurement. This will be the first measurement in 40 years and, with the use of more advanced techniques, shall provide a more reliable and accurate result. We propose to measure the capture cross section of 242Pu in the region from thermal up to at least 60 keV, aiming for a high energy limit of 500 keV. The experiment would make use of an array of 4 low neutron sensitivity C6D6 detectors and be carried out at the n_TOF EAR-1 (185 m flight path) measuring station. Compared to the current uncertainty of 35%, this measurement aims at an improved accuracy between 7% and 12% depending on the energy region.Preprin

LGTB legal protections: a comparative study of Spain and Scotland

[ES] La evolución legislativa de los derechos LGTB y especialmente de los derechos trans ha sido notable tanto en España como en Escocia. Ambos lugares han introducido cambios legislativos que eliminan las barreras para cambiar de género y contribuyen a la despatologización y la igualdad de derechos. Estos son una gran revolución legislativa y una conquista para el colectivo trans y LGTB en general. Uno de los puntos fuertes de ambos cambios legales es la eliminación del requisito médico o quirúrgico para la reasignación de género, además de la inclusión de otras medidas de protección tanto del propio colectivo como de los textos legales en sí. Ambos textos legales han sido claves para la comunidad LGTB y han sido reconocidos nacional e internacionalmente como un gran avance en materia de derechos humanos.[EU] LGTB eskubideen garapen arauetan, batez ere trans-identitateko eskubideen garapenean, nabarmentezina izan da Espainiako eta Eskoziakoetan. Bi leku horiek aldatzea legislatiboa sartu dute, genero aldaketa-barrerak kentzen dituztenak, despatologizazioa eta eskubide berberen arteko berdintasuna sustatzen dute. Hauek aldaketa legislatibo handiak dira eta trans kolektiboa eta LGTB kolektiboa orokorrean hainbat irabazitakoak dituzte. Aldaketa legal horietako bi punturik garrantzitsuenak, genero berridatzeko medikuen edo kirurgikoen eskakizunak kenduak izatea eta kolektiboa babesteko beste neurri batzuk sartzea dira, baita bere legetestuen babesa ere. Bi testu legal horiek LGTB komunitatearentzat garrantzitsiak izan dira eta nazioartean eta nazioarteko giza eskubideetan aurrera egiteko oso ekintza garrantzitsia izan dira.[EN] The legislative evolution of LGBT rights and especially trans rights has been remarkable in both Spain and Scotland. Both places have introduced legislative changes that remove barriers to changing gender and contribute to depathologisation and equal rights. These are a major legislative revolution and an achievement for trans and LGBT people in general. One of the strong points of both legal changes is the elimination of the medical or surgical requirement for gender reassignment, as well as the inclusion of other measures to protect both the collective itself and the legal texts. Both legal texts have been key for the LGBT community and have been recognised nationally and internationally as a breakthrough in human rights