Reactivation of interrupted moult by a Red-necked Nightjar (Caprimulgus ruficollis) in Catalonia (NE Spain)

El 29.09.85 es va capturar un siboc a Tiana (Barcelona) que reiniciava una muda interrompuda durant l'hivern. L'ocell havia reactivat la muda des del punt on l'havia aturada a l'hivern, confirmant que aquesta muda interrompuda era un cas de muda suspesa

Activitats del Grup Català d'Anellament durant el període 1994-1996

Aquest és el setè informe publicat pel Grup Català d'Anellament que cobreix el període 1994-1996. D'aquest període cal destacar la feina realitzada el 1996 amb un total de 43.842 ocells anellats, xifra que suposa un nou rècord. Durant aquests tres anys s'han anellat 121.335 ocells de 221 espècies, incloent 14 noves espècies. Aquest informe resumeix les principals campanyes efectuades i aporta un llistat dels controls i recuperacions més interessants

Activitats del Grup Català d'Anellament durant el període 1997-1999

Aquest és el vuitè informe publicat pel Grup Català d'Anellament que cobreix el període 1997-1999. Durant aquest període es van anellar un total de 142.233 ocells de 218 taxons, incloent 10 noves espècies. Aquest informe resumeix les activitats portades a terme durant aquests tres anys i a més aporta un llistat dels controls i recuperacions més interessants

Antimatter spectra from a time-dependent modeling of supernova remnants

We calculate the energy spectra of cosmic rays (CR) and their secondaries produced in a supernova remnant (SNR), taking into account the time-dependence of the SNR shock. We model the trajectories of charged particles as a random walk with a prescribed diffusioncoefficient, accelerating the particles at each shock crossing. Secondary production by CRs colliding with gas is included as a Monte Carlo process. We find that SNRs produce less antimatter than suggested previously: The positron/electron ratio and the antiproton/proton ratio are a few percent and few $\times 10^{-5}$, respectively. Both ratios do not rise with energy.Comment: 4 pages, 4 eps figures; v2: results for time-dependent magnetic field adde

Ionic compounds derived from crude glycerol: Thermal energy storage capability evaluation

Ionic liquids (diimidazol-1-ium esters) prepared from wastes, crude glycerol and carboxylic acids are investigated as potential phase change materials (PCM). The ionic liquids (IL) with best thermophysical properties were those with also better production yield (higher than 75%). The chemical composition of those IL was with R1 being (CH3)3CCO, CH3(CH2)14CO or C2H3CO; R2 being BIM+; R3 being BIM+; and X- being 2 Cl‾. Phase change of state (solid-liquid) of this IL was 85 ºC, 264 ºC and 128 ºC, which means potential application in different fields such as domestic hot water, solar cooling and industry, respectively. The measured melting enthalpy 328 kJ/kg, 408 kJ/kg, and 660 kJ/kg is much higher in all cases than the usual found in commercial PCM (100 kJ/kg), therefore, these ILs synthetized in this study are proper candidates to be used as PCM because of the huge amounts of energy that they are able to store and their low cost. Moreover, biobPCM are sustainable materials since its obtaining process is based on oil.The work is partially funded by the Spanish government (ENE2015-64117-C5-1-R (MINECO/FEDER) and CTQ2015-70982-C3-1-R (MINECO/FEDER)). The authors would like to thank the Catalan Government for the quality accreditation given to the research groups GREA (2014 SGR 123), Agricultural Biotechnology (2014 SGR 1296) and DIOPMA (2014 SGR 1543). Dr. Camila Barreneche would like to thank Ministerio de Economia y Competitividad de España for Grant Juan de la Cierva, FJCI-2014-22886.The research leading to these results has received funding from the European Union’s Seventh Framework Program (FP7/2007–2013) under grant agreement n° PIRSES-GA-2013-610692 (INNOSTORAGE) and from the European Union’s Horizon 2020 research and innovation program under grant agreement No 657466 (INPATH-TES)

High energy neutrino yields from astrophysical sources I: Weakly magnetized sources

We calculate the yield of high energy neutrinos produced in astrophysical sources with negligible magnetic fields varying their interaction depth from nearly transparent to opaque. We take into account the scattering of secondaries on background photons as well as the direct production of neutrinos in decays of charm mesons. If multiple scattering of nucleons becomes important, the neutrino spectra from meson and muon decays are strongly modified with respect to transparent sources. Characteristic for neutrino sources containing photons as scattering targets is a strong energy-dependence of the ratio $R^0$ of $\nu_\mu$ and $\nu_e$ fluxes at the sources, ranging from $R^0=\phi_\mu/\phi_e\sim 0$ below threshold to $R^0\sim 4$ close to the energy where the decay length of charged pions and kaons equals their interaction length on target photons. Above this energy, the neutrino flux is strongly suppressed and depends mainly on charm production.Comment: 10 pages, 16 figures, references added, matches published versio

SiRCub - Brazilian Agricultural Crop Recognition System.

This paper presents a novel approach to classify agricultural crops using NDVI time series. The novelty lies in i) extracting a set of features from the each and every NDVI curve, and ii) using them to train a crop classification model using a Support Vector Machine (SVM). Specifically, we use the TIMESAT program package to: 1) smooth the time series, 2) decompose them into agricultural seasons?a season is the period between sowing and harvesting?, and 3) extract the features for each season.SBSR 2015

Interplay between collective effects and nonstandard interactions of supernova neutrinos

We consider the effect of non-standard neutrino interactions (NSI, for short) on the propagation of neutrinos through the supernova (SN) envelope within a three-neutrino framework and taking into account the presence of a neutrino background. We find that for given NSI parameters, with strength generically denoted by εij, neutrino evolution exhibits a significant time dependence. For |εττ|≳ 10−3 the neutrino survival probability may become sensitive to the θ23 octant and the sign of εττ. In particular, if εττ≳10−2 an internal I-resonance may arise independently of the matter density. For typical values found in SN simulations this takes place in the same dense-neutrino region above the neutrinosphere where collective effects occur, in particular during the synchronization regime. This resonance may lead to an exchange of the neutrino fluxes entering the bipolar regime. The main consequences are (i) bipolar conversion taking place for normal neutrino mass hierarchy and (ii) a transformation of the flux of low-energy νe, instead of the usual spectral swap

Does ohmic heating influence the flow field in thin-layer electrodeposition?

In thin-layer electrodeposition the dissipated electrical energy leads to a substantial heating of the ion solution. We measured the resulting temperature field by means of an infrared camera. The properties of the temperature field correspond closely with the development of the concentration field. In particular we find, that the thermal gradients at the electrodes act like a weak additional driving force to the convection rolls driven by concentration gradients.Comment: minor changes: correct estimation of concentration at the anode, added Journal-re