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description Publicationkeyboard_double_arrow_right Article 2020 United KingdomPublisher:Elsevier BV Funded by:FCT | LA 1FCT| LA 1Authors: Qunming Wang; Chengyuan Zhang; Peter M. Atkinson;Qunming Wang; Chengyuan Zhang; Peter M. Atkinson;Remote sensing images contain abundant land cover information. Due to the complex nature of land cover, however, mixed pixels exist widely in remote sensing images. Sub-pixel mapping (SPM) is a technique for predicting the spatial distribution of land cover classes within mixed pixels. As an ill-posed inverse problem, the uncertainty of prediction cannot be eliminated and hinders the production of accurate sub-pixel maps. In contrast to conventional methods that use continuous geospatial information (e.g., images) to enhance SPM, in this paper, a SPM method with point constraints into SPM is proposed. The method of fusing point constraints is implemented based on the pixel swapping algorithm (PSA) and utilizes the auxiliary point information to reduce the uncertainty in the SPM process and increase map accuracy. The point data are incorporated into both the initialization and optimization processes of PSA. Experiments were performed on three images to validate the proposed method. The influences of the performances were also investigated under different numbers of point data, different spatial characters of land cover and different zoom factors. The results show that by using the point data, the proposed SPM method can separate more small-sized targets from aggregated artifacts and the accuracies are increased obviously. The proposed method is also more accurate than the advanced radial basis function interpolation-based method. The advantage of using point data is more evident when the point data size and scale factor are large and the spatial autocorrelation of the land cover is small. As the amount of point data increases, however, the increase in accuracy becomes less noticeable. Furthermore, the SPM accuracy can still be increased even if the point data and coarse proportions contain errors. © 2020 Elsevier Inc.
Remote Sensing of En... arrow_drop_down Remote Sensing of Environment; Lancaster EPrintsArticle . 2020 . Peer-reviewedLicense: Elsevier TDMadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesbronze 22 citations 22 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 2visibility views 2 download downloads 120 Powered bymore_vert Remote Sensing of En... arrow_drop_down Remote Sensing of Environment; Lancaster EPrintsArticle . 2020 . Peer-reviewedLicense: Elsevier TDMadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2016 PortugalPublisher:Elsevier BV Funded by:FCT | CICECO-Aveiro Institute o...FCT| CICECO-Aveiro Institute of MaterialsPereira, Luis M. C.; Martins, Vania; Kurnia, Kiki Adi; Oliveira, Mariana B.; Dias, Ana M. A.; Llovell, Felix; Vega, Lourdes F.; Carvalho, Pedro J.; Coutinho, Joao A. P.;handle: 10773/20131
The society and industry commitment to progressively reduce Green House Gases (GHGs) emissions forged important challenges that conventional gas separation processes are unable to overcome. Ionic liquids (ILs) have been attracting an outstanding attention during the last decade as a promising class of viable solvents to capture pollutants and for gas separation processes. Being the IL-based membranes gas separation controlled by the gas solubility in the IL rather than by its diffusivity, the solubility of gases in ILs stands as highly relevant input for their application in liquid membranes. As part of a continuing effort to develop an IL based process for high pressure capture of GHGs, the phase equilibria of nitrous oxide (N2O), methane (CH4) and nitrogen (N-2) were investigated in this work. Experimental gas-liquid equilibrium data for N2O, CH4 and N-2 in [C4C1 im][N(CN)(2)] were determined in the (293 to 363) K temperature range, for pressures up to 70 MPa and gas mole fractions up to 35 %. Unfavorable interactions towards the studied gases, with positive deviations to ideality, were observed for all the studied gases, placing the studied IL among those with the lowest selectivities reported. The observed behavior highlights that a delicate balance between the solvent polarity and its molar volume must be ascertained when a highly selective solvent for N-2 or CH4 separation is envisaged. The soft-SAFT EoS successfully described the high pressure phase behavior data using the molecular model and parameters sets reported in previous works. A good description of the binary systems studied, including the small CH4 temperature dependency and the N-2 reverse temperature dependency on the solubility were achieved using just one binary interaction parameter. This reinforces the use of soft-SAFT as an accurate model to describe the behavior of gases in ILs for different applications. (C) 2015 Elsevier B.V. All rights reserved.
LAReferencia - Red F... arrow_drop_down Repositório Institucional da Universidade de AveiroArticle . 2016Data sources: Repositório Institucional da Universidade de AveiroThe Journal of Supercritical FluidsArticle . 2016 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 39 citations 39 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert LAReferencia - Red F... arrow_drop_down Repositório Institucional da Universidade de AveiroArticle . 2016Data sources: Repositório Institucional da Universidade de AveiroThe Journal of Supercritical FluidsArticle . 2016 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Preprint 2021Publisher:Oxford University Press (OUP) Funded by:EC | EMERGE, FCT | D4EC| EMERGE ,FCT| D4Authors: Rodr��guez, ��.; Meza, N.; Pineda-Garc��a, J.; Ramirez, M.;Rodr��guez, ��.; Meza, N.; Pineda-Garc��a, J.; Ramirez, M.;We present $^{56}$Ni mass estimates for 110 normal Type II supernovae (SNe II), computed here from their luminosity in the radioactive tail. This sample consists of SNe from the literature, with at least three photometric measurements in a single optical band within 95-320 d since explosion. To convert apparent magnitudes to bolometric ones, we compute bolometric corrections (BCs) using 15 SNe in our sample having optical and near-IR photometry, along with three sets of SN II atmosphere models to account for the unobserved flux. We find that the $I$- and $i$-band are best suited to estimate luminosities through the BC technique. The $^{56}$Ni mass distribution of our SN sample has a minimum and maximum of 0.005 and 0.177 M$_{\odot}$, respectively, and a selection-bias-corrected average of $0.037\pm0.005$ M$_{\odot}$. Using the latter value together with iron isotope ratios of two sets of core-collapse (CC) nucleosynthesis models, we calculate a mean iron yield of $0.040\pm0.005$ M$_{\odot}$ for normal SNe II. Combining this result with recent mean $^{56}$Ni mass measurements for other CC SN subtypes, we estimate a mean iron yield $$36 per cent. We also find that the empirical relation between $^{56}$Ni mass and steepness parameter ($S$) is poorly suited to measure the $^{56}$Ni mass of normal SNe II. Instead, we present a correlation between $^{56}$Ni mass, $S$, and absolute magnitude at 50 d since explosion. The latter allows to measure $^{56}$Ni masses of normal SNe II with a precision around 30 per cent. Comment: 33 pages, 20 figures, 6 figures in appendix, accepted for publication to MNRAS
Monthly Notices of t... arrow_drop_down Monthly Notices of the Royal Astronomical SocietyArticle . 2021 . Peer-reviewedLicense: OUP Standard Publication Reusehttps://doi.org/10.48550/arxiv...Article . 2021License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1093/mnras/stab1335&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 8 citations 8 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert Monthly Notices of t... arrow_drop_down Monthly Notices of the Royal Astronomical SocietyArticle . 2021 . Peer-reviewedLicense: OUP Standard Publication Reusehttps://doi.org/10.48550/arxiv...Article . 2021License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type , Article 2016 United States, Switzerland, France, Finland, France, FinlandPublisher:American Association for the Advancement of Science (AAAS) Funded by:EC | nanoCAVa, AKA | Formation and growth of a..., AKA | ATMOSPHERIC SCIENCES - Pa... +16 projectsEC| nanoCAVa ,AKA| Formation and growth of atmospheric aerosol particles: from molecular to global scale ,AKA| ATMOSPHERIC SCIENCES - Particularly for determination of cluster and nanoaerosol composition ,AKA| Measurement of Nano-particle Nucelation in the Atmosphere via Cluster Ion Mass Spectrometry ,FCT| Collaboration in the CLOUD experiment ,SNSF| Investigation of new particle formation in the CLOUD chamber at CERN and the PSI smog chamber ,AKA| Nanoaerosol synthesis for bridging laboratory and field investigations of new particle formation and growth ,AKA| Formation and growth of atmospheric aerosol particles: from molecular to global scale ,FWF| Chemical Characterization of Organic Nanoparticles ,UKRI| E-Infrastructure Interconnectivity EPSRC - Chris Taylor ,AKA| Infrastructure of Environmental and Atmospheric Sciences (ATM-Science) ,SNSF| CLOUD ,SNSF| FORCE Proposal to Investigation of Secondary Organic Aerosol Formation in the PSI Smog Chamber and at CERN ,EC| ATMNUCLE ,AKA| Computational research chain from quantum chemistry to climate change / Consortium: ComQuaCC ,AKA| Nucleation of particles and ice in the atmosphere: from surface layer to upper troposphere ,SNSF| Investigation of Secondary Organic Aerosol Formation in the PSI Smog Chamber and at CERN ,UKRI| Global Aerosol Synthesis and Science Project (GASSP) to reduce the uncertainty in aerosol radiative forcing ,SNSF| Molecular Imaging of CNS-Immune System Interactions in Multiple SclerosisEimear M. Dunne; Hamish Gordon; Andreas Kürten; Joao Almeida; Jonathan Duplissy; Christina Williamson; Ismael K. Ortega; Kirsty J. Pringle; Alexey Adamov; Urs Baltensperger; Peter Barmet; Francois Benduhn; F. Bianchi; Martin Breitenlechner; Antony D. Clarke; Joachim Curtius; Josef Dommen; Neil M. Donahue; Sebastian Ehrhart; Richard C. Flagan; Alessandro Franchin; Roberto Guida; Jani Hakala; Armin Hansel; Martin Heinritzi; Tuija Jokinen; Juha Kangasluoma; Jasper Kirkby; Markku Kulmala; Agnieszka Kupc; Michael J. Lawler; Katrianne Lehtipalo; Vladimir Makhmutov; Graham Mann; Serge Mathot; Joonas Merikanto; Pasi Miettinen; Athanasios Nenes; Antti Onnela; Alexandru Rap; Carly Reddington; Francesco Riccobono; N. A. D. Richards; Matti P. Rissanen; Linda Rondo; Nina Sarnela; Siegfried Schobesberger; Kamalika Sengupta; Mario Simon; Mikko Sipilä; James N. Smith; Yuri Stozkhov; António Tomé; Jasmin Tröstl; Paul E. Wagner; Daniela Wimmer; Paul M. Winkler; Douglas R. Worsnop; Kenneth S. Carslaw;pmid: 27789796
New particle formation in the atmosphere produces around half of the cloud condensation nuclei that seed cloud droplets. Such particles have a pivotal role in determining the properties of clouds and the global radiation balance. Dunne et al. used the CLOUD (Cosmics Leaving Outdoor Droplets) chamber at CERN to construct a model of aerosol formation based on laboratory measured nucleation rates. They found that nearly all nucleation involves either ammonia or biogenic organic compounds. Furthermore in the present day atmosphere cosmic ray intensity cannot meaningfully affect climate via nucleation.Science this issue p. 1119Fundamental questions remain about the origin of newly formed atmospheric aerosol particles because data from laboratory measurements have been insufficient to build global models. In contrast gas phase chemistry models have been based on laboratory kinetics measurements for decades. We built a global model of aerosol formation by using extensive laboratory measurements of rates of nucleation involving sulfuric acid ammonia ions and organic compounds conducted in the CERN CLOUD (Cosmics Leaving Outdoor Droplets) chamber. The simulations and a comparison with atmospheric observations show that nearly all nucleation throughout the present day atmosphere involves ammonia or biogenic organic compounds in addition to sulfuric acid. A considerable fraction of nucleation involves ions but the relatively weak dependence on ion concentrations indicates that for the processes studied variations in cosmic ray intensity do not appreciably affect climate through nucleation in the present day atmosphere.U http://science.sciencemag.org/content/sci/354/6316/1119.full.pdf
Science arrow_drop_down ScienceOther literature type . Article . 2016 . Peer-reviewedCaltech AuthorsArticle . 2016 . Peer-reviewedFull-Text: https://authors.library.caltech.edu/71775/5/Global%20atmospheric%20particle%20formation.pdfData sources: Caltech AuthorsInfoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesbronze 276 citations 276 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 34visibility views 34 download downloads 740 Powered bymore_vert Science arrow_drop_down ScienceOther literature type . Article . 2016 . Peer-reviewedCaltech AuthorsArticle . 2016 . Peer-reviewedFull-Text: https://authors.library.caltech.edu/71775/5/Global%20atmospheric%20particle%20formation.pdfData sources: Caltech AuthorsInfoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1126/science.aaf2649&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type , Article 2020 CroatiaPublisher:Faculty of Mechanical Engineering and Naval Architecture, Univ. of Zagreb Funded by:FCT | EMC2, FCT | EMC2, FCT | EMC2FCT| EMC2 ,FCT| EMC2 ,FCT| EMC2Authors: Klaić, Miho; Brezak, Danko; Staroveški, Tomislav; Murat, Zrinka;Klaić, Miho; Brezak, Danko; Staroveški, Tomislav; Murat, Zrinka;doi: 10.21278/tof.43404
The application of four types of process signals in the indirect on-line monitoring of stone hardness has been analysed in this paper. Cutting forces, servomotor currents, vibration and acoustic emission signals were measured during the drilling of three types of stones characterised by different hardness and heterogeneity values. A group of features were extracted from each signal from the time and frequency domain. Their capacity to correctly classify stone hardness was analysed using an artificial neural network classifier. Stone samples were drilled with new drill bits and drill bits worn to three different wear levels in order to analyse the influence of tool wear on the hardness classification process. Nine combinations of cutting parameters were applied for each drill wear level and stone type. Features extracted from the vibration signals obtained the best results in the stone hardness classification. The results indicate their potential industrial application, since they have achieved a high classification precision regardless of the drill bit wear level.
Croatian Scientific ... arrow_drop_down Croatian Scientific Bibliography - CROSBIOther literature type . 2020Data sources: Croatian Scientific Bibliography - CROSBIHRČAK - Portal of scientific journals of CroatiaOther literature type . 2019Data sources: HRČAK - Portal of scientific journals of Croatiaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.21278/tof.43404&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Croatian Scientific ... arrow_drop_down Croatian Scientific Bibliography - CROSBIOther literature type . 2020Data sources: Croatian Scientific Bibliography - CROSBIHRČAK - Portal of scientific journals of CroatiaOther literature type . 2019Data sources: HRČAK - Portal of scientific journals of Croatiaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.21278/tof.43404&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Preprint , Article 2020 ItalyPublisher:EDP Sciences Funded by:FCT | CosmoESPRESSO, FCT | Institute of Astrophysics..., FCT | G.EANES +3 projectsFCT| CosmoESPRESSO ,FCT| Institute of Astrophysics and Space Sciences ,FCT| G.EANES ,FCT| IA ,FCT| EPIC ,EC| FOUR ACESF. Borsa; Romain Allart; Núria Casasayas-Barris; Hugo M. Tabernero; M. R. Zapatero Osorio; Stefano Cristiani; Francesco Pepe; Rafael Rebolo; Nuno C. Santos; V. Adibekyan; Vincent Bourrier; Olivier Demangeon; David Ehrenreich; Enric Palle; Susana Sousa; Jorge Lillo-Box; C. Lovis; Giuseppina Micela; Mahmoudreza Oshagh; Ennio Poretti; Alessandro Sozzetti; C. Allende Prieto; Yann Alibert; M. Amate; Willy Benz; François Bouchy; Alexandre Cabral; Hans Dekker; Valentina D'Odorico; P. Di Marcantonio; Pedro Figueira; R. Génova Santos; J. I. González Hernández; G. Lo Curto; Antonio Manescau; Carlos Martins; D. Mégevand; Andrea Mehner; Paolo Molaro; Nelson J. Nunes; Marco Riva; A. Suárez Mascareño; Stéphane Udry; Filippo Maria Zerbi;Context. Ultra-hot Jupiters are excellent laboratories for the study of exoplanetary atmospheres. WASP-121b is one of the most studied; many recent analyses of its atmosphere report interesting features at different wavelength ranges. Aims. In this paper we analyze one transit of WASP-121b acquired with the high-resolution spectrograph ESPRESSO at VLT in one-telescope mode, and one partial transit taken during the commissioning of the instrument in four-telescope mode. Methods. We take advantage of the very high S/N data and of the extreme stability of the spectrograph to investigate the anomalous in-transit radial velocity curve and study the transmission spectrum of the planet. We pay particular attention to the removal of instrumental effects, and stellar and telluric contamination. The transmission spectrum is investigated through single-line absorption and cross-correlation with theoretical model templates. Results. By analyzing the in-transit radial velocities we were able to infer the presence of the atmospheric Rossiter–McLaughlin effect. We measured the height of the planetary atmospheric layer that correlates with the stellar mask (mainly Fe) to be 1.052 ± 0.015 Rp and we also confirmed the blueshift of the planetary atmosphere. By examining the planetary absorption signal on the stellar cross-correlation functions we confirmed the presence of a temporal variation of its blueshift during transit, which could be investigated spectrum-by-spectrum thanks to the quality of our ESPRESSO data. We detected significant absorption in the transmission spectrum for Na, H, K, Li, Ca II, and Mg, and we certified their planetary nature by using the 2D tomographic technique. Particularly remarkable is the detection of Li, with a line contrast of ~0.2% detected at the 6σ level. With the cross-correlation technique we confirmed the presence of Fe I, Fe II, Cr I, and V I. Hα and Ca II are present up to very high altitudes in the atmosphere (~1.44 Rp and ~2 Rp, respectively), and also extend beyond the transit-equivalent Roche lobe radius of the planet. These layers of the atmosphere have a large line broadening that is not compatible with being caused by the tidally locked rotation of the planet alone, and could arise from vertical winds or high-altitude jets in the evaporating atmosphere. We thank the referee for their useful comments that helped improving the clarity of the manuscript. The authors acknowledge the ESPRESSO project team for its effort and dedication in building the ESPRESSO instrument. FB acknowledges financial support from INAF through the ASI-INAF contract 2015-019-R0, and M. Rainer for helpful discussions on the Fourier transform of the CCF. This work has been carried out within the framework of the National Centre of Competence in Research PlanetS supported by the Swiss National Science Foundation. R.A. acknowledge the financial support of the SNSF. This work was supported by FCT - Fundacao para a Ciencia e a Tecnologia through national funds and by FEDER through COMPETE2020 Programa Operacional Competitividade e Internacionalizacao by these grants: UID/FIS/04434/2019; UIDB/04434/2020; UIDP/04434/2020; PTDC/FISAST/32113/2017 & POCI-01-0145-FEDER-032113; PTDC/FIS-AST/28953/2017 & POCI-01-0145-FEDER-028953; PTDC/FIS-AST/28987/2017 & POCI-010145-FEDER-028987. O.D.S.D. is supported in the form of work contract (DL 57/2016/CP1364/CT0004) funded by FCT. This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (project Four Aces grant agreement no. 724427). This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. Based in part on Guaranteed Time Observations collected at the European Southern Observatory under ESO programme 1102.C-0744 by the ESPRESSO Consortium. Peerreview
arXiv.org e-Print Ar... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTAArticle . 2021 . 2022License: CC BY NC NDData sources: Recolector de Ciencia Abierta, RECOLECTAOA@INAF - Istituto Nazionale di AstrofisicaArticle . 2021Data sources: OA@INAF - Istituto Nazionale di AstrofisicaAstronomy and AstrophysicsOther literature type . Article . 2021 . 2020 . Peer-reviewedLicense: EDP Sciences Copyright and Publication Licensing Policyhttps://doi.org/10.48550/arxiv...Article . 2020License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 74 citations 74 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!more_vert arXiv.org e-Print Ar... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTAArticle . 2021 . 2022License: CC BY NC NDData sources: Recolector de Ciencia Abierta, RECOLECTAOA@INAF - Istituto Nazionale di AstrofisicaArticle . 2021Data sources: OA@INAF - Istituto Nazionale di AstrofisicaAstronomy and AstrophysicsOther literature type . Article . 2021 . 2020 . Peer-reviewedLicense: EDP Sciences Copyright and Publication Licensing Policyhttps://doi.org/10.48550/arxiv...Article . 2020License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1051/0004-6361/202039344&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2016Publisher:Copernicus GmbH Funded by:FCT | LA 15FCT| LA 15Kjetil Schanke Aas; Thorben Dunse; Emily Collier; Thomas V. Schuler; Terje Koren Berntsen; Jack Kohler; Bartłomiej Luks;In this study we simulate the climatic mass balance of Svalbard glaciers with a coupled atmosphere–glacier model with 3 km grid spacing, from September 2003 to September 2013. We find a mean specific net mass balance of −257 mm w.e. yr−1, corresponding to a mean annual mass loss of about 8.7 Gt, with large interannual variability. Our results are compared with a comprehensive set of mass balance, meteorological, and satellite measurements. Model temperature biases of 0.19 and −1.9 °C are found at two glacier automatic weather station sites. Simulated climatic mass balance is mostly within about 100 mm w.e. yr−1 of stake measurements, and simulated winter accumulation at the Austfonna ice cap shows mean absolute errors of 47 and 67 mm w.e. yr−1 when compared to radar-derived values for the selected years 2004 and 2006. Comparison of modeled surface height changes from 2003 to 2008, and satellite altimetry reveals good agreement in both mean values and regional differences. The largest deviations from observations are found for winter accumulation at Hansbreen (up to around 1000 mm w.e. yr−1), a site where sub-grid topography and wind redistribution of snow are important factors. Comparison with simulations using 9 km grid spacing reveal considerable differences on regional and local scales. In addition, 3 km grid spacing allows for a much more detailed comparison with observations than what is possible with 9 km grid spacing. Further decreasing the grid spacing to 1 km appears to be less significant, although in general precipitation amounts increase with resolution. Altogether, the model compares well with observations and offers possibilities for studying glacier climatic mass balance on Svalbard both historically as well as based on climate projections.
Norwegian Open Resea... arrow_drop_down add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/tc-10-1089-2016&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 48 citations 48 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert Norwegian Open Resea... arrow_drop_down add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2017 Portugal, SwitzerlandPublisher:Elsevier BV Funded by:FCT | SFRH/BD/28720/2006, EC | MADE-IN-EARTHFCT| SFRH/BD/28720/2006 ,EC| MADE-IN-EARTHAuthors: S.B.A. Henriques; A.M.R. Neiva; L. Tajčmanová; G.R. Dunning;S.B.A. Henriques; A.M.R. Neiva; L. Tajčmanová; G.R. Dunning;Lithos, 268-271 ISSN:0024-4937
Research Collection arrow_drop_down https://doi.org/doi.org/10.101...Article . Peer-reviewedData sources: European Union Open Data Portaladd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 10 citations 10 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 121visibility views 121 download downloads 160 Powered bymore_vert Research Collection arrow_drop_down https://doi.org/doi.org/10.101...Article . Peer-reviewedData sources: European Union Open Data Portaladd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.lithos.2016.11.002&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2021 ItalyPublisher:MDPI AG Funded by:FCT | D4FCT| D4Authors: Francesco Castelli; Salvatore Grasso; Valentina Lentini; Maria Stella Vanessa Sammito;Francesco Castelli; Salvatore Grasso; Valentina Lentini; Maria Stella Vanessa Sammito;handle: 20.500.11769/527865
This paper reports on the results of soil-foundation numerical modelling and the seismic response of a cooling tower founded on piles of a petrochemical facility located in the city of Augusta (Sicily, Italy). The city was affected in the past by some destructive earthquakes (1693, 1848, and 1990) that damaged a large territory of Southeastern Sicily, which was characterized by a very high seismic hazard. With this aim, the paper reports the FEM modelling of the seismic behaviour of the coupled soil-structure system. To determine the soil profile and the geotechnical characteristics, laboratory and in situ investigations were carried out in the studied area. The seismic event occurred in January 1693 and has been chosen as a scenario earthquake. Moreover, a parametric study with different input motions has also been carried out. A Mohr-Coulomb model has been adopted for the soil, and structural elements have been simulated by means of an elastic constitutive model. Two different vertical alignments have been analysed, considering both the free-field condition and the soil-structure interaction. The dynamic response has been investigated in terms of accelerations, response spectra, and amplification functions. The results have also been compared with those provided by Italian technical regulations. Finally, the seismic response of the coupled soil-structure system has been further examined in terms of peak bending moments along the pile foundation, emphasizing the possibility of a kinematic interaction on piles induced by the seismic action.
IRIS - Università de... arrow_drop_down GeosciencesOther literature type . Article . 2021 . Peer-reviewedLicense: CC BYFull-Text: http://www.mdpi.com/2076-3263/11/5/200/pdfIRIS - Università degli Studi di CataniaArticle . 2021Data sources: IRIS - Università degli Studi di Cataniaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 31 citations 31 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert IRIS - Università de... arrow_drop_down GeosciencesOther literature type . Article . 2021 . Peer-reviewedLicense: CC BYFull-Text: http://www.mdpi.com/2076-3263/11/5/200/pdfIRIS - Università degli Studi di CataniaArticle . 2021Data sources: IRIS - Università degli Studi di Cataniaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/geosciences11050200&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2014Publisher:Springer Science and Business Media LLC Funded by:FCT | LA 1, EC | VOLDIESFCT| LA 1 ,EC| VOLDIESSarah K. Brown; Helen Sian Crosweller; R. S. J. Sparks; Elizabeth Cottrell; Natalia I. Deligne; Natalie Ortiz Guerrero; Laura Hobbs; Koji Kiyosugi; Susan C. Loughlin; Lee Siebert; Shinji Takarada;The Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database contains data on 1,883 Quaternary eruption records of magnitude (M) 4 and above and is publically accessible online via the British Geological Survey. Spatial and temporal analysis of the data indicates that the record is incomplete and is thus biased. The recorded distribution of volcanoes is variable on a global scale, with three-quarters of all volcanoes with M≥4 Quaternary activity located in the northern hemisphere and a quarter within Japan alone. The distribution of recorded eruptions does not strictly follow the spatial distribution of volcanoes and has distinct intra-regional variability, with about 40% of all recorded eruptions having occurred in Japan, reflecting in part the country’s efforts devoted to comprehensive volcanic studies. The number of eruptions in LaMEVE decreases with increasing age, exemplified by the recording of 50% of all known Quaternary eruptions during the last 20,000 years. Historical dating is prevalent from 1450 AD to the present day, substantially improving record completeness. The completeness of the record also improves as magnitude increases. This is demonstrated by the calculation of the median time, T50, for eruptions within given magnitude intervals, where 50% of eruptions are older than T50: T50 ranges from 5,070 years for M4-4.9 eruptions to 935,000 years for M≥8 eruptions. T50 follows a power law fit, suggesting a quantifiable relationship between eruption size and preservation potential of eruptive products. Several geographic regions have T50 ages of <250 years for the smallest (~M4) eruptions reflecting substantial levels of under-recording. There is evidence for latitudinal variation in eruptive activity, possibly due to the effects of glaciation. A peak in recorded activity is identified at 11 to 9 ka in high-latitude glaciated regions. This is absent in non-glaciated regions, supporting the hypothesis of increased volcanism due to ice unloading around this time. Record completeness and consequent interpretation of record limitations are important in understanding volcanism on global to local scales and must be considered during rigorous volcanic hazard and risk assessments. The study also indicates that there need to be improvements in the quality of data, including assessment of uncertainties in volume estimates.
Journal of Applied V... arrow_drop_down add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 91 citations 91 popularity Top 1% influence Top 10% impulse Top 10% Powered by BIP!visibility 3visibility views 3 download downloads 159 Powered bymore_vert Journal of Applied V... arrow_drop_down add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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description Publicationkeyboard_double_arrow_right Article 2020 United KingdomPublisher:Elsevier BV Funded by:FCT | LA 1FCT| LA 1Authors: Qunming Wang; Chengyuan Zhang; Peter M. Atkinson;Qunming Wang; Chengyuan Zhang; Peter M. Atkinson;Remote sensing images contain abundant land cover information. Due to the complex nature of land cover, however, mixed pixels exist widely in remote sensing images. Sub-pixel mapping (SPM) is a technique for predicting the spatial distribution of land cover classes within mixed pixels. As an ill-posed inverse problem, the uncertainty of prediction cannot be eliminated and hinders the production of accurate sub-pixel maps. In contrast to conventional methods that use continuous geospatial information (e.g., images) to enhance SPM, in this paper, a SPM method with point constraints into SPM is proposed. The method of fusing point constraints is implemented based on the pixel swapping algorithm (PSA) and utilizes the auxiliary point information to reduce the uncertainty in the SPM process and increase map accuracy. The point data are incorporated into both the initialization and optimization processes of PSA. Experiments were performed on three images to validate the proposed method. The influences of the performances were also investigated under different numbers of point data, different spatial characters of land cover and different zoom factors. The results show that by using the point data, the proposed SPM method can separate more small-sized targets from aggregated artifacts and the accuracies are increased obviously. The proposed method is also more accurate than the advanced radial basis function interpolation-based method. The advantage of using point data is more evident when the point data size and scale factor are large and the spatial autocorrelation of the land cover is small. As the amount of point data increases, however, the increase in accuracy becomes less noticeable. Furthermore, the SPM accuracy can still be increased even if the point data and coarse proportions contain errors. © 2020 Elsevier Inc.
Remote Sensing of En... arrow_drop_down Remote Sensing of Environment; Lancaster EPrintsArticle . 2020 . Peer-reviewedLicense: Elsevier TDMadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesbronze 22 citations 22 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 2visibility views 2 download downloads 120 Powered bymore_vert Remote Sensing of En... arrow_drop_down Remote Sensing of Environment; Lancaster EPrintsArticle . 2020 . Peer-reviewedLicense: Elsevier TDMadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2016 PortugalPublisher:Elsevier BV Funded by:FCT | CICECO-Aveiro Institute o...FCT| CICECO-Aveiro Institute of MaterialsPereira, Luis M. C.; Martins, Vania; Kurnia, Kiki Adi; Oliveira, Mariana B.; Dias, Ana M. A.; Llovell, Felix; Vega, Lourdes F.; Carvalho, Pedro J.; Coutinho, Joao A. P.;handle: 10773/20131
The society and industry commitment to progressively reduce Green House Gases (GHGs) emissions forged important challenges that conventional gas separation processes are unable to overcome. Ionic liquids (ILs) have been attracting an outstanding attention during the last decade as a promising class of viable solvents to capture pollutants and for gas separation processes. Being the IL-based membranes gas separation controlled by the gas solubility in the IL rather than by its diffusivity, the solubility of gases in ILs stands as highly relevant input for their application in liquid membranes. As part of a continuing effort to develop an IL based process for high pressure capture of GHGs, the phase equilibria of nitrous oxide (N2O), methane (CH4) and nitrogen (N-2) were investigated in this work. Experimental gas-liquid equilibrium data for N2O, CH4 and N-2 in [C4C1 im][N(CN)(2)] were determined in the (293 to 363) K temperature range, for pressures up to 70 MPa and gas mole fractions up to 35 %. Unfavorable interactions towards the studied gases, with positive deviations to ideality, were observed for all the studied gases, placing the studied IL among those with the lowest selectivities reported. The observed behavior highlights that a delicate balance between the solvent polarity and its molar volume must be ascertained when a highly selective solvent for N-2 or CH4 separation is envisaged. The soft-SAFT EoS successfully described the high pressure phase behavior data using the molecular model and parameters sets reported in previous works. A good description of the binary systems studied, including the small CH4 temperature dependency and the N-2 reverse temperature dependency on the solubility were achieved using just one binary interaction parameter. This reinforces the use of soft-SAFT as an accurate model to describe the behavior of gases in ILs for different applications. (C) 2015 Elsevier B.V. All rights reserved.
LAReferencia - Red F... arrow_drop_down Repositório Institucional da Universidade de AveiroArticle . 2016Data sources: Repositório Institucional da Universidade de AveiroThe Journal of Supercritical FluidsArticle . 2016 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 39 citations 39 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert LAReferencia - Red F... arrow_drop_down Repositório Institucional da Universidade de AveiroArticle . 2016Data sources: Repositório Institucional da Universidade de AveiroThe Journal of Supercritical FluidsArticle . 2016 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.supflu.2015.12.006&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Preprint 2021Publisher:Oxford University Press (OUP) Funded by:EC | EMERGE, FCT | D4EC| EMERGE ,FCT| D4Authors: Rodr��guez, ��.; Meza, N.; Pineda-Garc��a, J.; Ramirez, M.;Rodr��guez, ��.; Meza, N.; Pineda-Garc��a, J.; Ramirez, M.;We present $^{56}$Ni mass estimates for 110 normal Type II supernovae (SNe II), computed here from their luminosity in the radioactive tail. This sample consists of SNe from the literature, with at least three photometric measurements in a single optical band within 95-320 d since explosion. To convert apparent magnitudes to bolometric ones, we compute bolometric corrections (BCs) using 15 SNe in our sample having optical and near-IR photometry, along with three sets of SN II atmosphere models to account for the unobserved flux. We find that the $I$- and $i$-band are best suited to estimate luminosities through the BC technique. The $^{56}$Ni mass distribution of our SN sample has a minimum and maximum of 0.005 and 0.177 M$_{\odot}$, respectively, and a selection-bias-corrected average of $0.037\pm0.005$ M$_{\odot}$. Using the latter value together with iron isotope ratios of two sets of core-collapse (CC) nucleosynthesis models, we calculate a mean iron yield of $0.040\pm0.005$ M$_{\odot}$ for normal SNe II. Combining this result with recent mean $^{56}$Ni mass measurements for other CC SN subtypes, we estimate a mean iron yield $$36 per cent. We also find that the empirical relation between $^{56}$Ni mass and steepness parameter ($S$) is poorly suited to measure the $^{56}$Ni mass of normal SNe II. Instead, we present a correlation between $^{56}$Ni mass, $S$, and absolute magnitude at 50 d since explosion. The latter allows to measure $^{56}$Ni masses of normal SNe II with a precision around 30 per cent. Comment: 33 pages, 20 figures, 6 figures in appendix, accepted for publication to MNRAS
Monthly Notices of t... arrow_drop_down Monthly Notices of the Royal Astronomical SocietyArticle . 2021 . Peer-reviewedLicense: OUP Standard Publication Reusehttps://doi.org/10.48550/arxiv...Article . 2021License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 8 citations 8 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert Monthly Notices of t... arrow_drop_down Monthly Notices of the Royal Astronomical SocietyArticle . 2021 . Peer-reviewedLicense: OUP Standard Publication Reusehttps://doi.org/10.48550/arxiv...Article . 2021License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type , Article 2016 United States, Switzerland, France, Finland, France, FinlandPublisher:American Association for the Advancement of Science (AAAS) Funded by:EC | nanoCAVa, AKA | Formation and growth of a..., AKA | ATMOSPHERIC SCIENCES - Pa... +16 projectsEC| nanoCAVa ,AKA| Formation and growth of atmospheric aerosol particles: from molecular to global scale ,AKA| ATMOSPHERIC SCIENCES - Particularly for determination of cluster and nanoaerosol composition ,AKA| Measurement of Nano-particle Nucelation in the Atmosphere via Cluster Ion Mass Spectrometry ,FCT| Collaboration in the CLOUD experiment ,SNSF| Investigation of new particle formation in the CLOUD chamber at CERN and the PSI smog chamber ,AKA| Nanoaerosol synthesis for bridging laboratory and field investigations of new particle formation and growth ,AKA| Formation and growth of atmospheric aerosol particles: from molecular to global scale ,FWF| Chemical Characterization of Organic Nanoparticles ,UKRI| E-Infrastructure Interconnectivity EPSRC - Chris Taylor ,AKA| Infrastructure of Environmental and Atmospheric Sciences (ATM-Science) ,SNSF| CLOUD ,SNSF| FORCE Proposal to Investigation of Secondary Organic Aerosol Formation in the PSI Smog Chamber and at CERN ,EC| ATMNUCLE ,AKA| Computational research chain from quantum chemistry to climate change / Consortium: ComQuaCC ,AKA| Nucleation of particles and ice in the atmosphere: from surface layer to upper troposphere ,SNSF| Investigation of Secondary Organic Aerosol Formation in the PSI Smog Chamber and at CERN ,UKRI| Global Aerosol Synthesis and Science Project (GASSP) to reduce the uncertainty in aerosol radiative forcing ,SNSF| Molecular Imaging of CNS-Immune System Interactions in Multiple SclerosisEimear M. Dunne; Hamish Gordon; Andreas Kürten; Joao Almeida; Jonathan Duplissy; Christina Williamson; Ismael K. Ortega; Kirsty J. Pringle; Alexey Adamov; Urs Baltensperger; Peter Barmet; Francois Benduhn; F. Bianchi; Martin Breitenlechner; Antony D. Clarke; Joachim Curtius; Josef Dommen; Neil M. Donahue; Sebastian Ehrhart; Richard C. Flagan; Alessandro Franchin; Roberto Guida; Jani Hakala; Armin Hansel; Martin Heinritzi; Tuija Jokinen; Juha Kangasluoma; Jasper Kirkby; Markku Kulmala; Agnieszka Kupc; Michael J. Lawler; Katrianne Lehtipalo; Vladimir Makhmutov; Graham Mann; Serge Mathot; Joonas Merikanto; Pasi Miettinen; Athanasios Nenes; Antti Onnela; Alexandru Rap; Carly Reddington; Francesco Riccobono; N. A. D. Richards; Matti P. Rissanen; Linda Rondo; Nina Sarnela; Siegfried Schobesberger; Kamalika Sengupta; Mario Simon; Mikko Sipilä; James N. Smith; Yuri Stozkhov; António Tomé; Jasmin Tröstl; Paul E. Wagner; Daniela Wimmer; Paul M. Winkler; Douglas R. Worsnop; Kenneth S. Carslaw;pmid: 27789796
New particle formation in the atmosphere produces around half of the cloud condensation nuclei that seed cloud droplets. Such particles have a pivotal role in determining the properties of clouds and the global radiation balance. Dunne et al. used the CLOUD (Cosmics Leaving Outdoor Droplets) chamber at CERN to construct a model of aerosol formation based on laboratory measured nucleation rates. They found that nearly all nucleation involves either ammonia or biogenic organic compounds. Furthermore in the present day atmosphere cosmic ray intensity cannot meaningfully affect climate via nucleation.Science this issue p. 1119Fundamental questions remain about the origin of newly formed atmospheric aerosol particles because data from laboratory measurements have been insufficient to build global models. In contrast gas phase chemistry models have been based on laboratory kinetics measurements for decades. We built a global model of aerosol formation by using extensive laboratory measurements of rates of nucleation involving sulfuric acid ammonia ions and organic compounds conducted in the CERN CLOUD (Cosmics Leaving Outdoor Droplets) chamber. The simulations and a comparison with atmospheric observations show that nearly all nucleation throughout the present day atmosphere involves ammonia or biogenic organic compounds in addition to sulfuric acid. A considerable fraction of nucleation involves ions but the relatively weak dependence on ion concentrations indicates that for the processes studied variations in cosmic ray intensity do not appreciably affect climate through nucleation in the present day atmosphere.U http://science.sciencemag.org/content/sci/354/6316/1119.full.pdf
Science arrow_drop_down ScienceOther literature type . Article . 2016 . Peer-reviewedCaltech AuthorsArticle . 2016 . Peer-reviewedFull-Text: https://authors.library.caltech.edu/71775/5/Global%20atmospheric%20particle%20formation.pdfData sources: Caltech AuthorsInfoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesbronze 276 citations 276 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 34visibility views 34 download downloads 740 Powered bymore_vert Science arrow_drop_down ScienceOther literature type . Article . 2016 . Peer-reviewedCaltech AuthorsArticle . 2016 . Peer-reviewedFull-Text: https://authors.library.caltech.edu/71775/5/Global%20atmospheric%20particle%20formation.pdfData sources: Caltech AuthorsInfoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type , Article 2020 CroatiaPublisher:Faculty of Mechanical Engineering and Naval Architecture, Univ. of Zagreb Funded by:FCT | EMC2, FCT | EMC2, FCT | EMC2FCT| EMC2 ,FCT| EMC2 ,FCT| EMC2Authors: Klaić, Miho; Brezak, Danko; Staroveški, Tomislav; Murat, Zrinka;Klaić, Miho; Brezak, Danko; Staroveški, Tomislav; Murat, Zrinka;doi: 10.21278/tof.43404
The application of four types of process signals in the indirect on-line monitoring of stone hardness has been analysed in this paper. Cutting forces, servomotor currents, vibration and acoustic emission signals were measured during the drilling of three types of stones characterised by different hardness and heterogeneity values. A group of features were extracted from each signal from the time and frequency domain. Their capacity to correctly classify stone hardness was analysed using an artificial neural network classifier. Stone samples were drilled with new drill bits and drill bits worn to three different wear levels in order to analyse the influence of tool wear on the hardness classification process. Nine combinations of cutting parameters were applied for each drill wear level and stone type. Features extracted from the vibration signals obtained the best results in the stone hardness classification. The results indicate their potential industrial application, since they have achieved a high classification precision regardless of the drill bit wear level.
Croatian Scientific ... arrow_drop_down Croatian Scientific Bibliography - CROSBIOther literature type . 2020Data sources: Croatian Scientific Bibliography - CROSBIHRČAK - Portal of scientific journals of CroatiaOther literature type . 2019Data sources: HRČAK - Portal of scientific journals of Croatiaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Croatian Scientific ... arrow_drop_down Croatian Scientific Bibliography - CROSBIOther literature type . 2020Data sources: Croatian Scientific Bibliography - CROSBIHRČAK - Portal of scientific journals of CroatiaOther literature type . 2019Data sources: HRČAK - Portal of scientific journals of Croatiaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Preprint , Article 2020 ItalyPublisher:EDP Sciences Funded by:FCT | CosmoESPRESSO, FCT | Institute of Astrophysics..., FCT | G.EANES +3 projectsFCT| CosmoESPRESSO ,FCT| Institute of Astrophysics and Space Sciences ,FCT| G.EANES ,FCT| IA ,FCT| EPIC ,EC| FOUR ACESF. Borsa; Romain Allart; Núria Casasayas-Barris; Hugo M. Tabernero; M. R. Zapatero Osorio; Stefano Cristiani; Francesco Pepe; Rafael Rebolo; Nuno C. Santos; V. Adibekyan; Vincent Bourrier; Olivier Demangeon; David Ehrenreich; Enric Palle; Susana Sousa; Jorge Lillo-Box; C. Lovis; Giuseppina Micela; Mahmoudreza Oshagh; Ennio Poretti; Alessandro Sozzetti; C. Allende Prieto; Yann Alibert; M. Amate; Willy Benz; François Bouchy; Alexandre Cabral; Hans Dekker; Valentina D'Odorico; P. Di Marcantonio; Pedro Figueira; R. Génova Santos; J. I. González Hernández; G. Lo Curto; Antonio Manescau; Carlos Martins; D. Mégevand; Andrea Mehner; Paolo Molaro; Nelson J. Nunes; Marco Riva; A. Suárez Mascareño; Stéphane Udry; Filippo Maria Zerbi;Context. Ultra-hot Jupiters are excellent laboratories for the study of exoplanetary atmospheres. WASP-121b is one of the most studied; many recent analyses of its atmosphere report interesting features at different wavelength ranges. Aims. In this paper we analyze one transit of WASP-121b acquired with the high-resolution spectrograph ESPRESSO at VLT in one-telescope mode, and one partial transit taken during the commissioning of the instrument in four-telescope mode. Methods. We take advantage of the very high S/N data and of the extreme stability of the spectrograph to investigate the anomalous in-transit radial velocity curve and study the transmission spectrum of the planet. We pay particular attention to the removal of instrumental effects, and stellar and telluric contamination. The transmission spectrum is investigated through single-line absorption and cross-correlation with theoretical model templates. Results. By analyzing the in-transit radial velocities we were able to infer the presence of the atmospheric Rossiter–McLaughlin effect. We measured the height of the planetary atmospheric layer that correlates with the stellar mask (mainly Fe) to be 1.052 ± 0.015 Rp and we also confirmed the blueshift of the planetary atmosphere. By examining the planetary absorption signal on the stellar cross-correlation functions we confirmed the presence of a temporal variation of its blueshift during transit, which could be investigated spectrum-by-spectrum thanks to the quality of our ESPRESSO data. We detected significant absorption in the transmission spectrum for Na, H, K, Li, Ca II, and Mg, and we certified their planetary nature by using the 2D tomographic technique. Particularly remarkable is the detection of Li, with a line contrast of ~0.2% detected at the 6σ level. With the cross-correlation technique we confirmed the presence of Fe I, Fe II, Cr I, and V I. Hα and Ca II are present up to very high altitudes in the atmosphere (~1.44 Rp and ~2 Rp, respectively), and also extend beyond the transit-equivalent Roche lobe radius of the planet. These layers of the atmosphere have a large line broadening that is not compatible with being caused by the tidally locked rotation of the planet alone, and could arise from vertical winds or high-altitude jets in the evaporating atmosphere. We thank the referee for their useful comments that helped improving the clarity of the manuscript. The authors acknowledge the ESPRESSO project team for its effort and dedication in building the ESPRESSO instrument. FB acknowledges financial support from INAF through the ASI-INAF contract 2015-019-R0, and M. Rainer for helpful discussions on the Fourier transform of the CCF. This work has been carried out within the framework of the National Centre of Competence in Research PlanetS supported by the Swiss National Science Foundation. R.A. acknowledge the financial support of the SNSF. This work was supported by FCT - Fundacao para a Ciencia e a Tecnologia through national funds and by FEDER through COMPETE2020 Programa Operacional Competitividade e Internacionalizacao by these grants: UID/FIS/04434/2019; UIDB/04434/2020; UIDP/04434/2020; PTDC/FISAST/32113/2017 & POCI-01-0145-FEDER-032113; PTDC/FIS-AST/28953/2017 & POCI-01-0145-FEDER-028953; PTDC/FIS-AST/28987/2017 & POCI-010145-FEDER-028987. O.D.S.D. is supported in the form of work contract (DL 57/2016/CP1364/CT0004) funded by FCT. This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (project Four Aces grant agreement no. 724427). This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. Based in part on Guaranteed Time Observations collected at the European Southern Observatory under ESO programme 1102.C-0744 by the ESPRESSO Consortium. Peerreview
arXiv.org e-Print Ar... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTAArticle . 2021 . 2022License: CC BY NC NDData sources: Recolector de Ciencia Abierta, RECOLECTAOA@INAF - Istituto Nazionale di AstrofisicaArticle . 2021Data sources: OA@INAF - Istituto Nazionale di AstrofisicaAstronomy and AstrophysicsOther literature type . Article . 2021 . 2020 . Peer-reviewedLicense: EDP Sciences Copyright and Publication Licensing Policyhttps://doi.org/10.48550/arxiv...Article . 2020License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 74 citations 74 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!more_vert arXiv.org e-Print Ar... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTAArticle . 2021 . 2022License: CC BY NC NDData sources: Recolector de Ciencia Abierta, RECOLECTAOA@INAF - Istituto Nazionale di AstrofisicaArticle . 2021Data sources: OA@INAF - Istituto Nazionale di AstrofisicaAstronomy and AstrophysicsOther literature type . Article . 2021 . 2020 . Peer-reviewedLicense: EDP Sciences Copyright and Publication Licensing Policyhttps://doi.org/10.48550/arxiv...Article . 2020License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2016Publisher:Copernicus GmbH Funded by:FCT | LA 15FCT| LA 15Kjetil Schanke Aas; Thorben Dunse; Emily Collier; Thomas V. Schuler; Terje Koren Berntsen; Jack Kohler; Bartłomiej Luks;In this study we simulate the climatic mass balance of Svalbard glaciers with a coupled atmosphere–glacier model with 3 km grid spacing, from September 2003 to September 2013. We find a mean specific net mass balance of −257 mm w.e. yr−1, corresponding to a mean annual mass loss of about 8.7 Gt, with large interannual variability. Our results are compared with a comprehensive set of mass balance, meteorological, and satellite measurements. Model temperature biases of 0.19 and −1.9 °C are found at two glacier automatic weather station sites. Simulated climatic mass balance is mostly within about 100 mm w.e. yr−1 of stake measurements, and simulated winter accumulation at the Austfonna ice cap shows mean absolute errors of 47 and 67 mm w.e. yr−1 when compared to radar-derived values for the selected years 2004 and 2006. Comparison of modeled surface height changes from 2003 to 2008, and satellite altimetry reveals good agreement in both mean values and regional differences. The largest deviations from observations are found for winter accumulation at Hansbreen (up to around 1000 mm w.e. yr−1), a site where sub-grid topography and wind redistribution of snow are important factors. Comparison with simulations using 9 km grid spacing reveal considerable differences on regional and local scales. In addition, 3 km grid spacing allows for a much more detailed comparison with observations than what is possible with 9 km grid spacing. Further decreasing the grid spacing to 1 km appears to be less significant, although in general precipitation amounts increase with resolution. Altogether, the model compares well with observations and offers possibilities for studying glacier climatic mass balance on Svalbard both historically as well as based on climate projections.
Norwegian Open Resea... arrow_drop_down add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 48 citations 48 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert Norwegian Open Resea... arrow_drop_down add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/tc-10-1089-2016&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2017 Portugal, SwitzerlandPublisher:Elsevier BV Funded by:FCT | SFRH/BD/28720/2006, EC | MADE-IN-EARTHFCT| SFRH/BD/28720/2006 ,EC| MADE-IN-EARTHAuthors: S.B.A. Henriques; A.M.R. Neiva; L. Tajčmanová; G.R. Dunning;S.B.A. Henriques; A.M.R. Neiva; L. Tajčmanová; G.R. Dunning;Lithos, 268-271 ISSN:0024-4937
Research Collection arrow_drop_down https://doi.org/doi.org/10.101...Article . Peer-reviewedData sources: European Union Open Data Portaladd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 10 citations 10 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 121visibility views 121 download downloads 160 Powered bymore_vert Research Collection arrow_drop_down https://doi.org/doi.org/10.101...Article . Peer-reviewedData sources: European Union Open Data Portaladd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.lithos.2016.11.002&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2021 ItalyPublisher:MDPI AG Funded by:FCT | D4FCT| D4Authors: Francesco Castelli; Salvatore Grasso; Valentina Lentini; Maria Stella Vanessa Sammito;Francesco Castelli; Salvatore Grasso; Valentina Lentini; Maria Stella Vanessa Sammito;handle: 20.500.11769/527865
This paper reports on the results of soil-foundation numerical modelling and the seismic response of a cooling tower founded on piles of a petrochemical facility located in the city of Augusta (Sicily, Italy). The city was affected in the past by some destructive earthquakes (1693, 1848, and 1990) that damaged a large territory of Southeastern Sicily, which was characterized by a very high seismic hazard. With this aim, the paper reports the FEM modelling of the seismic behaviour of the coupled soil-structure system. To determine the soil profile and the geotechnical characteristics, laboratory and in situ investigations were carried out in the studied area. The seismic event occurred in January 1693 and has been chosen as a scenario earthquake. Moreover, a parametric study with different input motions has also been carried out. A Mohr-Coulomb model has been adopted for the soil, and structural elements have been simulated by means of an elastic constitutive model. Two different vertical alignments have been analysed, considering both the free-field condition and the soil-structure interaction. The dynamic response has been investigated in terms of accelerations, response spectra, and amplification functions. The results have also been compared with those provided by Italian technical regulations. Finally, the seismic response of the coupled soil-structure system has been further examined in terms of peak bending moments along the pile foundation, emphasizing the possibility of a kinematic interaction on piles induced by the seismic action.
IRIS - Università de... arrow_drop_down GeosciencesOther literature type . Article . 2021 . Peer-reviewedLicense: CC BYFull-Text: http://www.mdpi.com/2076-3263/11/5/200/pdfIRIS - Università degli Studi di CataniaArticle . 2021Data sources: IRIS - Università degli Studi di Cataniaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 31 citations 31 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert IRIS - Università de... arrow_drop_down GeosciencesOther literature type . Article . 2021 . Peer-reviewedLicense: CC BYFull-Text: http://www.mdpi.com/2076-3263/11/5/200/pdfIRIS - Università degli Studi di CataniaArticle . 2021Data sources: IRIS - Università degli Studi di Cataniaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/geosciences11050200&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2014Publisher:Springer Science and Business Media LLC Funded by:FCT | LA 1, EC | VOLDIESFCT| LA 1 ,EC| VOLDIESSarah K. Brown; Helen Sian Crosweller; R. S. J. Sparks; Elizabeth Cottrell; Natalia I. Deligne; Natalie Ortiz Guerrero; Laura Hobbs; Koji Kiyosugi; Susan C. Loughlin; Lee Siebert; Shinji Takarada;The Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database contains data on 1,883 Quaternary eruption records of magnitude (M) 4 and above and is publically accessible online via the British Geological Survey. Spatial and temporal analysis of the data indicates that the record is incomplete and is thus biased. The recorded distribution of volcanoes is variable on a global scale, with three-quarters of all volcanoes with M≥4 Quaternary activity located in the northern hemisphere and a quarter within Japan alone. The distribution of recorded eruptions does not strictly follow the spatial distribution of volcanoes and has distinct intra-regional variability, with about 40% of all recorded eruptions having occurred in Japan, reflecting in part the country’s efforts devoted to comprehensive volcanic studies. The number of eruptions in LaMEVE decreases with increasing age, exemplified by the recording of 50% of all known Quaternary eruptions during the last 20,000 years. Historical dating is prevalent from 1450 AD to the present day, substantially improving record completeness. The completeness of the record also improves as magnitude increases. This is demonstrated by the calculation of the median time, T50, for eruptions within given magnitude intervals, where 50% of eruptions are older than T50: T50 ranges from 5,070 years for M4-4.9 eruptions to 935,000 years for M≥8 eruptions. T50 follows a power law fit, suggesting a quantifiable relationship between eruption size and preservation potential of eruptive products. Several geographic regions have T50 ages of <250 years for the smallest (~M4) eruptions reflecting substantial levels of under-recording. There is evidence for latitudinal variation in eruptive activity, possibly due to the effects of glaciation. A peak in recorded activity is identified at 11 to 9 ka in high-latitude glaciated regions. This is absent in non-glaciated regions, supporting the hypothesis of increased volcanism due to ice unloading around this time. Record completeness and consequent interpretation of record limitations are important in understanding volcanism on global to local scales and must be considered during rigorous volcanic hazard and risk assessments. The study also indicates that there need to be improvements in the quality of data, including assessment of uncertainties in volume estimates.
Journal of Applied V... arrow_drop_down add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 91 citations 91 popularity Top 1% influence Top 10% impulse Top 10% Powered by BIP!visibility 3visibility views 3 download downloads 159 Powered bymore_vert Journal of Applied V... arrow_drop_down add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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