High-speed tunable photonic crystal fiber-based femtosecond soliton source without dispersion pre-compensation

We present a high-speed wavelength tunable photonic crystal fiber-based source capable of generating tunable femtosecond solitons in the infrared region. Through measurements and numerical simulation, we show that both the pulsewidth and the spectral width of the output pulses remain nearly constant over the entire tuning range from 860 to 1160 nm. This remarkable behavior is observed even when pump pulses are heavily chirped (7400 fs^2), which allows to avoid bulky compensation optics, or the use of another fiber, for dispersion compensation usually required by the tuning device.Comment: 8 pages, 11 figure

Educational Experiences in Informatics: Innovations in Internet Searches in Academic Environments

This paper presents innovative experiences in the way of teaching to search information of academic style in Internet to first year students, of the UNRN (Andina headquarters) where Informatics is a transversal topic to their careers. Since 2013 in the Workshop on Informatics a group of teachers inquiries about innovate the way how students make Internet information searches on the academic section, trying that they acquire the ability and the criteria to potentiate their searches, to value their results and to give meaning to the iterative cycle of conformation of correct search keywords, trying this to be useful in the development of their performance as students and later as professionals. We will discuss the methodological recommendations that are offered, the types of tasks and guidelines with which it is tried to innovate the search of information in Internet in academic environments, and the obtained results since 2016.VI Workshop de Innovación en Educación en Informática (WIEI).Red de Universidades con Carreras en Informática (RedUNCI

Educational Experiences in Informatics: Innovations in Internet Searches in Academic Environments

This paper presents innovative experiences in the way of teaching to search information of academic style in Internet to first year students, of the UNRN (Andina headquarters) where Informatics is a transversal topic to their careers. Since 2013 in the Workshop on Informatics a group of teachers inquiries about innovate the way how students make Internet information searches on the academic section, trying that they acquire the ability and the criteria to potentiate their searches, to value their results and to give meaning to the iterative cycle of conformation of correct search keywords, trying this to be useful in the development of their performance as students and later as professionals. We will discuss the methodological recommendations that are offered, the types of tasks and guidelines with which it is tried to innovate the search of information in Internet in academic environments, and the obtained results since 2016.VI Workshop de Innovación en Educación en Informática (WIEI).Red de Universidades con Carreras en Informática (RedUNCI

Heat pump for radiant cooled and heated floor driven by a microphotovoltaic system

This paper reports a solar trigeneration system installed at the Solar Energy Experimental Plant owned by the Spanish National Research Council (CSIC), located in Arganda del Rey, 20km east from Madrid.The authors want to express their gratitude to the Ministerio de Economía y Competitividad of Spain for funding the research project ENE2010-20650-CO2-01

SPANISH DEEP-SEA FISHERIES IN THE CECAF AREA

Deep-seafisheriestakeplaceatgreatdepths(between200-2000meters),oncontinentalslopes,oceanicseamounts,ridgesystemsbanks. Thesefisheriestargetdemersal/benthicspeciesusingarangeofgearsincludingbottomandmid-watertrawls,potsandlonglines. Deep-seafisheriestakeplaceinbothexclusiveeconomiczones(EEZs)andinareasbeyondnationaljurisdiction(ABNJ)

Transcriptome profiling of Set5 and Set1 methyltransferases: Tools for visualization of gene expression

AbstractCells regulate transcription by coordinating the activities of multiple histone modifying complexes. We recently identified the yeast histone H4 methyltransferase Set5 and discovered functional overlap with the histone H3 methyltransferase Set1 in gene expression. Specifically, using next-generation RNA sequencing (RNA-Seq), we found that Set5 and Set1 function synergistically to regulate specific transcriptional programs at subtelomeres and transposable elements. Here we provide a comprehensive description of the methodology and analysis tools corresponding to the data deposited in NCBI's Gene Expression Omnibus (GEO) under the accession number GSE52086. This data complements the experimental methods described in Mas Martín G et al. (2014) and provides the means to explore the cooperative functions of histone H3 and H4 methyltransferases in the regulation of transcription. Furthermore, a fully annotated R code is included to enable researchers to use the following computational tools: comparison of significant differential expression (SDE) profiles; gene ontology enrichment of SDE; and enrichment of SDE relative to chromosomal features, such as centromeres, telomeres, and transposable elements. Overall, we present a bioinformatics platform that can be generally implemented for similar analyses with different datasets and in different organisms

Modulation of glycolisis and the pentose phosphate pathway influences porcine oocyte in vitro maturation

Glycolytic and pentose phosphate pathway (PPP) activities were modulated in porcine cumulus-oocyte complexes (COCs) during in vitro maturation (IVM) by the addition of inhibitors or stimulators of key enzymes of the pathways to elucidate their relative participation in oocyte maturation. The activities of glycolysis and PPP were evaluated by lactate production per COC and by the brilliant cresyl blue test, respectively. Glucose uptake per COC and the oocyte maturation rate were also evaluated. Lactate production, glucose uptake and the percentage of oocytes reaching metaphase II decreased in a dose-dependent manner in the presence of the pharmacological (NaF) or the physiological (ATP) inhibitors of glycolysis (p < 0.05). The addition of the physiological stimulator of glycolysis (AMP) caused no effect on lactate production, glucose uptake or the meiotic maturation rate. The pharmacological (6-AN) and the physiological (NADPH) inhibitors of PPP induced a dose-dependent decrease in the percentage of oocytes with high PPP activity and in the nuclear maturation rate (p < 0.05). The physiological stimulator of PPP (NADP) caused no effect on the percentage of oocytes with high PPP activity. The glycolytic and PPP activities of porcine COCs and maturational competence of oocytes seem to be closely related events. This study shows for the first time the regulatory effect of ATP and NADPH as physiological inhibitors of glycolysis and PPP in porcine COCs, respectively. Besides, these pathways seem to reach their maximum activities in porcine COCs during IVM because no further increases were achieved by the presence of AMP or NADP.Fil: Alvarez, Gabriel Martín. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Instituto de Investigacion y Tecnología en Reproducción Animal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario; ArgentinaFil: Ferretti, E. L.. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Instituto de Investigacion y Tecnología en Reproducción Animal; ArgentinaFil: Gutnisky, Cynthia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Instituto de Investigacion y Tecnología en Reproducción Animal; ArgentinaFil: Dalvit, Gabriel Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Instituto de Investigacion y Tecnología en Reproducción Animal; ArgentinaFil: Cetica, Pablo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Instituto de Investigacion y Tecnología en Reproducción Animal; Argentin

COMPOSICION DE LA DIETA POST‐REPRODUCTIVA DE LA GAVIOTA COCINERA (LARUS DOMINICANUS) EN EL LAGO NAHUEL HUAPI, PATAGONIA ARGENTINA

Resumen ∙ La Gaviota Cocinera (Larus dominicanus) es una especie generalista que ha expandido e incrementado sus poblaciones en Patagonia. Su capacidad para explotar el consumo de fuentes de alimento de origen antrópico, es uno de los factores que ha permitido esta expansión, tanto en ambientes marinos como dulceacuícolas. La colonización de nuevos ambientes puede afectar directa o indirectamente a otras especies, ya sea por predación, competencia o cleptoparasitismo. Por esto último, resulta necesario conocer la composición de la dieta de las poblaciones de Gaviota Cocinera asentadas recientemente en ambientes continentales de agua dulce. El presente estudio brinda información de la dieta post‐reproductiva de la especie en un ambiente dulce‐acuícola patagónico. Se recolectaron 75 pellets regurgitados de la especie en el complejo Islas de La Guardia en el lago Nahuel Huapi, Provincia del Neuquén, Argentina, en la etapa post‐reproductiva de 2010 (21 de enero–27 de febrero 2011). Los desechos orgánicos de origen antrópico fueron los más frecuentes por pellet (58,6%), seguido por insectos (33,3%) y crustáceos (17,3%). En cuanto a la abundancia, los insectos (48,9%) y los desechos orgánicos (24,7%) fueron los ítems más importantes. Para constatar el origen de los pellets y analizar las proporciones etarias fueron censados adultos, subadultos y juveniles en el área antes de cada recolección de pellets regurgitados. El promedio de adultos fue 77,1 (ES = 40,6, rango = 43–155), el de sub‐adultos 6,3 (ES = 3,6, rango = 3–15) y el de juveniles fue de 3 individuos (ES = 2,8, rango = 1–9). La utilización de desechos orgánicos antrópicos por los adultos de Gaviota Cocinera en este ambiente, demostró ser igualmente importante en los períodos post‐reproductivo y reproductivo, y la escasez de juveniles en los censos sugiere la utilización diferencial de recursos. Este es el primer estudio sobre la dieta post‐reproductiva de la Gaviota Cocinera en un ambiente dulce‐acuícola. Abstract ∙ Diet of post‐breeding Kelp Gulls (Larus dominicanus) in Nahuel Huapi Lake, Patagonia Argentina The Kelp Gull (Larus dominicanus) is a generalist species undergoing a process of range expansion and population increase in Patagonia. The ability of utilizing anthropogenic waste is one of the factors that might have enabled this expansion into freshwater environments. Colonization of new environments could affect directly or indirectly other species, throughout predation, competence or kleptoparasitism. In this sense, it is necessary to understand the diet of the recent populations settled in continental freshwater environments. The current study provides information about the post‐breeding diet in a freshwater environment in Patagonia. We collected 75 regurgitated pellets in De La Guardia Islands during the post‐breeding period between January and February 2010 in Nahuel Huapi Lake, Neuquén province, Argentina. Organic human refuse was the most frequent item (58.6%), followed by insects (33.3%) and crustaceans (17.3%). Insects (48.9%) and human refuse (24.7%) were the most important prey items in terms of abundance. Pellets were mainly cast by adults (mean number of adults = 77.1 per visit, SD = 40.6, range = 43–155), which were much more abundant than sub‐adults (mean = 6.3 per visit, SD = 3.6, range = 3–15) or juveniles (mean = 3, SD = 2.8, range = 1–9). Human refuse importance in the diet of the Kelp Gull was as important during post‐breeding as during breeding season. This is the first report of the post‐breeding diet composition of the Kelp Gull in a continental freshwater environment

Population structure of Asconema setubalense Kent, 1870 at Concepción Seamount, Canary Islands (Spain). Methodological approach using non-invasive techniques

The hexactinellid sponge Asconema setubalense Kent, 1870is a large bathyal species of the North Atlantic Ocean with a funnel-like body and very large osculum. Populations of A. setubalense have a three-dimensional structure and increase the complexity and biodiversity in their habitat, and are therefore considered to be a habitat-forming species. Nevertheless, at present the information on the extension, biomass, density, population structure, and ecology of this species is scarce, and it could be susceptible to the longline fishing practices that take place in the Canary Islands. The main objectives of this study are to define a functional and accurate methodology to measure specimens of A. setubalense by comparing differences in users, techniques, and morphometric measurements; to describe the height-size relationship; to present the population size structure of the species, and to establish a relationship between the size of A. setubalense and the environmental variables that can be found at the “Banco de La Concepción” seamount (BC). The obtained results suggest that surface area is the most reliable measurement to define the size of this species, whilst also showing a clear correlation with the height of the species. The selected methodology has made it possible to measure the surface area of 1035 specimens and thus obtain the size structure of the population of A. setubalense in BC. The GAM model that was used to analyse the relationship between the size of A. setubalense and the geomorphologic variables of BC, shows areas where there is a high probability of finding large specimens of the species. The results of this study greatly enhance the knowledge of this species and its habitat, and should be considered in future conservation directives, or in the development of indicators to show the good environmental state of habitats. Additionally, the study improves analysis methodology that, with the appropriate morphometric measurements, can favour the development of future studies of this species, and indeed others with a similar morphology or growth pattern.En prensa2,42

Seasonal variation in the diet of the Common Barn-Owl (Tyto alba) in a disturbed environment of the Argentinean Dry Chaco

Se estudió la dieta de la Lechuza de Campanario (Tyto alba) en un sector del Chaco Seco en Santiago del Estero, Argentina. A partir de 332 egagrópilas colectadas entre 2007 y 2009 se analizó la variación estacional en el número y la biomasa de los ítems presa, la diversidad y la amplitud de nicho trófico. Entre los 1170 individuos predados se registraron 14 ítems presa, correspondientes a mamíferos (87%), aves (7%) e insectos (6%). Los roedores cricétidos constituyeron el grupo más frecuente (85%) y con el mayor aporte de biomasa (>75%), con una amplia dominancia de Calomys spp. Durante el primer año la abundancia de micromamíferos en la estación seca alcanzó valores máximos, en tanto que aves e insectos mostraron el patrón opuesto. La diversidad y la amplitud de nicho trófico presentaron valores máximos durante la estación húmeda y la superposición trófica fue más baja entre muestras de estaciones diferentes. La variación estacional de la biomasa en la dieta se debió principalmente al mayor consumo de aves durante la estación húmeda de 2008. En la estación húmeda del segundo año de muestreo la dieta presentó un comportamiento anómalo, en algunos casos completamente opuesto a lo esperado, probablemente relacionado a una marcada disminución en las precipitaciones. Los resultados confirman una dieta generalista–oportunista, con un alto consumo de micromamíferos durante la estación seca explicado por sus tamaños poblaciones elevados. La modificación del ambiente explicaría la extrema dominancia de Calomys spp., como ya fuera documentado en otras áreas de Argentina.We studied the diet of the Common Barn-Owl (Tyto alba) in the Dry Chaco of Santiago del Estero, Argentina. From 332 pellets collected between 2007 and 2009 we analyzed the seasonal variation in number and biomass of prey-items, diversity, and trophic niche width. We identified 1170 individuals belonging to 14 prey-items, corresponding to mammals (87%), birds (7%) and insects (6%). Cricetid rodents were the most frequent group (85%) with the highest biomass contribution (>75%), being Calomys spp. the most abundant item. During the dry season of the first year, the abundance of micromammals reached the highest values while birds and insects showed the opposite pattern. Diversity and trophic niche width showed their highest values during the wet season and niche overlap was lower between samples of different seasons. Seasonal variation in biomass was mostly due to a higher consumption of birds during the wet season of 2008. In the wet season of the second year the diet showed an anomalous behaviour, in some cases showing the opposite of the expected patterns, probably related to a pronounced decrease in rainfall. The results of this study allow us to confirm a generalist-opportunistic diet, with high consumption of micromammals during the dry season probably explained by their high population sizes. Environmental modifications could be explaining the extreme dominance of Calomys spp., as it has been documented in other regions of Argentina