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LOFT: the Large Observatory For X-ray Timing
The LOFT mission concept is one of four candidates selected by ESA for the M3 launch opportunity as Medium Size missions of the Cosmic Vision programme. The launch window is currently planned for between 2022 and 2024. LOFT is designed to exploit the diagnostics of rapid X-ray flux and spectral variability that directly probe the motion of matter down to distances very close to black holes and neutron stars, as well as the physical state of ultra-dense matter. These primary science goals will be addressed by a payload composed of a Large Area Detector (LAD) and a Wide Field Monitor (WFM). The LAD is a collimated (<1 degree field of view) experiment operating in the energy range 2-50 keV,…
Synergetic effect of gold in Au/Pd catalysts during hydrodesulfurization reactions of model compounds
Abstract The simultaneous formation of colloidal dispersions of Pd and Au metal particles protected by the organic polymer polyvinylpyrrolidone (PVP) in reducing alcohol solution was used for the synthesis of new silica-supported monometallic and bimetallic Au x Pd y catalysts with different x / y ratios. The samples, with a 2 wt% total metal loading, after air calcinations at 673 K to remove the PVP, were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and FTIR spectra of chemisorbed CO. Formation of alloyed Au x Pd y particles of different metal composition with consequent modification of their electronic and geometric properties was ascertained. The catalytic activi…
Academic domains as political battlegrounds: A global enquiry by 99 academics in the fields of education and technology
WOS: 000401148100005
EVpedia: a community web portal for extracellular vesicles research
Abstract Motivation: Extracellular vesicles (EVs) are spherical bilayered proteolipids, harboring various bioactive molecules. Due to the complexity of the vesicular nomenclatures and components, online searches for EV-related publications and vesicular components are currently challenging. Results: We present an improved version of EVpedia, a public database for EVs research. This community web portal contains a database of publications and vesicular components, identification of orthologous vesicular components, bioinformatic tools and a personalized function. EVpedia includes 6879 publications, 172 080 vesicular components from 263 high-throughput datasets, and has been accessed more tha…
Step-by-Step Growth of HKUST-1 on Functionalized TiO2 Surface: An Efficient Material for CO2 Capture and Solar Photoreduction
The present study reports on a simple preparation strategy of a hybrid catalyst, TiO2/HKUST-1, containing TiO2 anatase nanoparticles (NPs) with tailored morphology and photocatalytic activity coupled with a porous metal-organic framework (MOF), namely HKUST-1, as an advanced material for the CO2 photocatalytic reduction. In detail, TiO2/HKUST-1 catalyst was prepared via an easy slow-diffusion method combined with a step-by-step self-assembly at room temperature. The growth of crystalline HKUST-1 onto titania surface was achieved by functionalizing TiO2 nanocrystals, with phosphoesanoic acid (PHA), namely TiO2-PHA, which provides an intimate contact between MOF and TiO2. The presence of a cr…
Digital Storytelling as a genre of mediatized self-representations: an introduction
Este artículo ofrece una revisión crítica de algunos de los estudios más relevantes sobre relato digital y propone una tipología de género que permite una clasificación inicial en dos grandes tipos: educativo y social. El argumento principal es que la diferenciación entre lo social y educativo, aunque uno no excluye al otro, ofrece la posibilidad de clasificar la producción masiva de relatos digitales disponibles hoy en día en Internet. Los artículos incluidos en este número son, en su mayoría, educativos (Ramírez-Verdugo y Grande Sotomayor, y Reyes, Pich & García, Londoño-Godoy), aunque en todos ellos todos ellos incluyen algunos rasgo de lo social. Bou-Franch nos habla de las estrategias …
LA GESTIONE DEL VIGNETO SICILIANO
Matematica e Musica: l’Apprendimento di base
Il percorso sperimentale descritto nell’articolo4 vuol porre in evidenza come, attraverso un approccio significativo all’educazione musicale, intesa nello specifico come analisi sistematica degli indici di articolazione strutturale, che ne caratterizzano e qualificano il linguaggio, si possano sviluppare le capacità d’intuizione, analisi e sintesi tipiche del pensiero logico- deduttivo. Gli approfondimenti svolti in tale prospettiva, hanno permesso di evidenziare come un iter siffatto promuova in maniera evidente il passaggio tra registri semiotici diversi (Linguaggio Naturale, iconografico, musicale, geometrico e pre-algebrico), favorendo l’acquisizione di una buona competenza nell’analisi…