First record of the invasive Hemidactylus mabouia (Moreau de Jonnès, 1818) (Squamata, Gekkonidae), in the dry Chaco, Argentina

The invasive Hemidactylus mabouia (Moreau de Jonnès, 1818) is one of the most widespread introduced species of reptiles, being present in the New World at least 500 years ago. In this work, we report for the first time, the presence of the invasive gecko H. mabouia in the dry Chaco, a biogeographic region included in the Gran Chaco Sudamericano. We collected 3 individuals in an urban zone at Las Lomitas, Patiño department, Formosa Province, Argentina. This new record extends the distribution range of this introduced species by nearly 300 km (in a straight line) from Formosa city, the nearest point previously reported.Fil: Torres, Pablo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; ArgentinaFil: Escalante, Orlando Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; ArgentinaFil: Cardozo, Dario Elbio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentin

Predation by banana spiders (genus Cupiennius) on the treefrog Dendropsophus carnifex (Duellman, 1969) in Ecuador

We here report a case of predation involving Dendropsophus carnifex (Anura: Hylidae) and a banana spider.Fil: Prémel, Vincent. Ecole Pratique des Hautes Etudes; FranciaFil: Torres, Pablo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Universidad Nacional de Misiones. Instituto de Biología Subtropical; Argentin

First record of green crabs, Carcinus maenas (Linnaeus, 1758) in Golfo Nuevo, Chubut Argentina: a new northern limit of distribution in the Patagonian coast

El objetivo de esta nota es reportar la presencia del cangrejo verde europeo, Carcinus maenas en el Golfo Nuevo, en Chubut, Argentina. Este hallazgo extiende su rango de distribución 250 km al norte del primer reporte en el Golfo San Jorge, en las costas patagónicas. C. maenas es una de las especies invasoras acuáticas más exitosas del mundo, con poblaciones establecidas en todos los continentes. Es un depredador voraz, por lo que su presencia representa una amenaza para la integridad de los ecosistemas costeros del sur de Sudamérica y para las economías de las comunidades pesqueras de la región.This note was aimed at reporting the presence of the “European green crab” Carcinus maenas in the coast of Nuevo Gulf (Chubut, Argentina). This new record extends the actual distribution range of this species 250 km to the north of San Jorge Gulf, where it was previously reported. C. maenas is one of the most successful aquatic invaders in the world, with populations established on all continents, and represents a threat to the integrity of coastal ecosystems of southern South America, and also to the economies of fishing communities of South Atlantic.Fil: Torres, Pablo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Universidad Nacional de Misiones. Instituto de Biología Subtropical; ArgentinaFil: Gonzalez Pisani, Ximena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Universidad Nacional de Misiones. Instituto de Biología Subtropical; Argentin

Use of Optimised LSTM Neural Networks Pre-Trained With Synthetic Data to Estimate PV Generation

Optimising the use of the photovoltaic (PV) energy is essential to reduce fossil fuel emissions by increasing the use of solar power generation. In recent years, research has focused on physical simulations or artifical intelligence models attempting to increase the accuracy of PV generation predictions. The use of simulated data as pre-training for deep learning models has increased in different fields. The reasons are the higher efficiency in the subsequent training with real data and the possibility of not having real data available. This work presents a methodology, based on an deep learning model optimised with specific techniques and pre-trained with synthetic data, to estimate the generation of a PV system. A case study of a photovoltaic installation with 296 PV panels located in northwest Spain is presented. The results show that the model with proper pre-training trains six to seven times faster than a model without pre-training and three to four times faster than a model pre-trained with non-accurate simulated data. In terms of accuracy and considering a homogeneous training process, all models obtained average relative errors around 12%, except the model with incorrect pre-training which performs worse

Qualitative operational value at risk for an electric utility based on the guidelines of the basel committee

This paper presents a model for determining value at operational risk ?OpVaR? in electric utilities, with the aim to confirm the versatility of the Bank for International Settlements (BIS) proposals. The model intends to open a new methodological approach in risk management, paying special attention to underlying operational sources of risk

Infección puerperal en función del número de tactos vaginales realizados en mujeres en labor de parto en el hospital Gíneco-Obstétrico Isidro Ayora desde julio hasta diciembre del 2012.

El puerperio es el período que comprende desde el final del parto hasta la 6ta semana post parto. En este tiempo se desarrollan cambios fisiológicos con la finalidad de retornar gradualmente al estado pregravídico y establecer la lactancia..

Measurement of the 77Se(n, γ) cross section up to 200 keV at the n_TOF facility at CERN

The 77 Se ( n , γ ) reaction is of importance for 77 Se abundance during the slow neutron capture process in massive stars. We have performed a new measurement of the 77 Se radiative neutron capture cross section at the Neutron Time-of-Flight facility at CERN. Resonance capture kernels were derived up to 51 keV and cross sections up to 200 keV. Maxwellian-averaged cross sections were calculated for stellar temperatures between k T = 5 keV and k T = 100 keV , with uncertainties between 4.2% and 5.7%. Our results lead to substantial decreases of 14% and 19% in 77 Se abundances produced through the slow neutron capture process in selected stellar models of 15 M ⊙ and 2 M ⊙ , respectively, compared to using previous recommendation of the cross section.UK Science and Facilities Council (ST/M006085/1)MSMT of the Czech RepublicThe Charles University UNCE/SCI/013 projectEuropean Research Council ERC-2015-StG No. 67749

Measurement of the 14N(n, p) 14C cross section at the CERN n_TOF facility from subthermal energy to 800 keV

Background: The 14N(n, p) 14C reaction is of interest in neutron capture therapy, where nitrogen-related dose is the main component due to low-energy neutrons, and in astrophysics, where 14N acts as a neutron poison in the s process. Several discrepancies remain between the existing data obtained in partial energy ranges: thermal energy, keV region, and resonance region. Purpose: We aim to measure the 14N(n, p) 14C cross section from thermal to the resonance region in a single measurement for the first time, including characterization of the first resonances, and provide calculations of Maxwellian averaged cross sections (MACS). Method: We apply the time-of-flight technique at Experimental Area 2 (EAR-2) of the neutron time-of-flight (n_TOF) facility at CERN. 10B(n, & alpha;) 7Li and 235U(n, f ) reactions are used as references. Two detection systems are run simultaneously, one on beam and another off beam. Resonances are described with the R-matrix code SAMMY. Results: The cross section was measured from subthermal energy to 800 keV, resolving the first two resonances (at 492.7 and 644 keV). A thermal cross section was obtained (1.809 & PLUSMN; 0.045 b) that is lower than the two most recent measurements by slightly more than one standard deviation, but in line with the ENDF/B-VIII.0 and JEFF-3.3 evaluations. A 1/v energy dependence of the cross section was confirmed up to tens of keV neutron energy. The low energy tail of the first resonance at 492.7 keV is lower than suggested by evaluated values, while the overall resonance strength agrees with evaluations. Conclusions: Our measurement has allowed determination of the 14N(n, p) cross section over a wide energy range for the first time. We have obtained cross sections with high accuracy (2.5%) from subthermal energy to 800 keV and used these data to calculate the MACS for kT = 5 to kT = 100 keV.p>Instituto de Salud Carlos III Spanish Government PID2020-117969RB-I00Junta de Andalucia (FEDER Andalucia 2014-2020) P20-00665 B-FQM-156UGR20UK Science and Facilities Council ST/M006085/1 ST/P004008/1European Research Council (ERC) 677497Spanish Ministry of Science, Innovation and Universities under the FPU Grant FPU17/0230

Fission program at n_TOF

Since its start in 2001 the n_TOF collaboration developed a measurement program on fission, in view of advanced fuels in new generation reactors. A special effort was made on measurement of cross sections of actinides, exploiting the peculiarity of the n_TOF neutron beam which spans a huge energy domain, from the thermal region up to GeV. Moreover fission fragment angular distributions have also been measured. An overview of the cross section results achieved with different detectors is presented, including a discussion of the 237Np case where discrepancies showed up between different detector systems. The results on the anisotropy of the fission fragments and its implication on the mechanism of neutron absorption, and in applications, are also shown