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Superhydrophobic and corrosion-resistant siloxane-modified MgAl-LDHs coatings on magnesium alloy prepared under mild conditions

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 450-463页

作者： Wenxi Zhang Zhangzelong Zhuo Dan Xu Liang Wu Zhihui Xie Chemical Synthesis and pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637002China College of Materials Science and Engineering/national Engineering research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China

We have developed a superhydrophobic and corrosion-resistant LDH-W/PFDTMS composite coating on the surface of Mg *** composite comprised a tungstate-intercalated(LDH-W)underlayer that was grown at low temperature(relative to hydrothermal reaction conditions)under atmospheric pressure and an outer polysiloxane layer created from a solution containing perfluorodecyltrimethoxysilane(PFDTMS)using a simple immersion *** successful intercalation of tungstate into the LDH phase and the following formation of the polysiloxane layer were confirmed through X-ray diffraction(XRD),Fourier transform infrared(FTIR)spectroscopy,and X-ray photoelectron spectroscopy(XPS).The corrosion resistance of the LDH-W film,both before and after the PFDTMS modification,was evaluated using electrochemical impedance spectroscopy(EIS),Tafel curves,and immersion *** results showed that Mg coated with LDH-W/PFDTMS exhibited significantly enhanced corrosion protection compared to the unmodified LDHW film,with no apparent signs of corrosion after exposure to 3.5wt%NaCl solution for 15 ***,the LDH-W/PFDTMS coating demonstrated superior superhydrophobicity and self-cleaning properties against water and several common beverages,as confirmed by static contact angle and water-repellency *** results offer valuable insights into preparing superhydrophobic and corrosion-resistant LDH-based composite coatings on Mg alloy surfaces under relatively mild reaction conditions.

关键词： Mg alloy corrosion coating layered double hydroxide

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GEOSS Platform data content and use

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International Journal of Digital Earth 2023年第1期16卷 715-740页

作者： Enrico Boldrini Stefano Nativi Jiri Hradec Mattia Santoro Paolo Mazzetti Max Craglia national research council of italy Institute of Atmospheric Pollution ResearchFlorenceIltaly Joint research Centre B6 UnitIspraItaly

The GEOSS Platform is a key contribution to the goal of building the Global Earth Observation System of Systems(GEOSS).It enables a harmonized discovery and access of Earth observation data,shared online by heterogeneous organizations *** work analyzes both what is made available in the GEOSS Platform by the data providers and how users are utilizing it including multiyear trends,updating a previous analysis published in *** present statistics derive from a 2021 EOValue report funded by the European *** offer of GEOSS Platform data has been the object of various analyses,including data provider characterization,data sharing trends,and data characterization(comprising metadata quality analysis,thematic analysis,responsible party identification,spatial–temporal coverage).GEOSS data demand has also been the object of several analyses,including data consumer characterization,utilization trends,and requested data characterization(comprising thematic analysis,spatial–temporal coverage,and popularity).Among thefindings,a large amount of shared data,mostly from satellite sources,emerges with an issue of low metadata quality and related discovery ***,the trend in usage is ***,the progressive disconnection of the GEOSS platform from its data Providers and Users and other possible causes are also reported.

关键词： Earth observations GEOSS System-of-Systems geospatial data quality discovery service

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Publishing China satellite data on the GEOSS Platform

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Big Earth Data 2023年第2期7卷 398-412页

作者： Roberto Roncella Lianchong Zhang Enrico Boldrini Mattia Santoro Paolo Mazzetti Stefano Nativi national research council of italy-institute of atmospheric pollution research Division of FlorenceFlorenceItaly Aerospace Information research institute Chinese Academy of SciencesBeijingChina

This paper is the first of a series that describes some of the main dataset resources presently shared through the GEOSS *** GEOSS Platform has been created to provide the technological tool to implement the Global Earth Observation System of Systems(GEOSS);it is a brokering infrastructure that presently brokers more than 190 autonomous data catalogs and information *** paper analyses the China Satellite datasets and describes the data publishing process from China GEOSS Data Provider to the GEOSS Platform considering both administrative registration as well as the technical *** China Satellite datasets are considered as one of the most important satellite data shared by the GEOSS *** analysis provides some insights as well about GEOSS user searches for China Satellite datasets.

关键词： GEOSS data interoperability data sharing satellite data Earth observation

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Publishing NextGEOSS data on the GEOSS Platform

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Big Earth Data 2023年第2期7卷 413-427页

作者： Roberto Roncella Enrico Boldrini Mattia Santoro Paolo Mazzetti João Andrade Nuno Catarino Stefano Nativi national research council of italy Institute of Atmospheric Pollution ResearchDivision of FlorenceFlorenceItaly Deimos Engenharia Avenida Columbano BordaloPinheiroLisbonPortugal

This paper is the second of a series that describes some of the main dataset resources presently shared through the GEOSS Platform. The GEOSS Platform was created as the technological tool to implement interoperability among the Global Earth Observation System of Systems (GEOSS);it is a brokering infrastructure that presently brokers more than 190 autonomous data catalogs and information systems. This paper is focused on the analysis of the NextGEOSS datasets describing the data publishing process from NextGEOSS to the GEOSS platform. In particular, both the administrative registration and the technical registration were taken into consideration. One of the most important data shared by the GEOSS Platform are the NextGEOSS datasets: the present study provides some insights in terms of GEOSS user searches for NextGEOSS data.

关键词： Earth observation GEOSS data interoperability data sharing data brokering services

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Virtual earth cloud: a multi-cloud framework for enabling geosciences digital ecosystems

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International Journal of Digital Earth 2023年第1期16卷 43-65页

作者： Mattia Santoro Paolo Mazzetti Stefano Nativi national research council of italy Institute of Atmospheric Pollution Research-Unit of FlorenceRomaItaly Joint research Centre of the European Commission B6 UnitIspraltaly

Humankind is facing unprecedented global environmental and social challenges in terms of food,water and energy security,resilience to natural hazards,*** address these challenges,international organizations have defined a list of policy actions to be achieved in a relatively short and medium-term *** development and use of knowledge platforms is key in helping the decision-making process to take significant decisions(providing the best available knowledge)and avoid potentially negative impacts on society and the *** knowledge platforms must build on the recent and next coming digital technologies that have transformed society–including the science and engineering *** Earth Data(BED)science aims to provide the methodologies and instruments to generate knowledge from numerous,complex,and diverse data *** science requires the development of Geoscience Digital Ecosystems(GEDs),which bank on the combined use of fundamental technology units(*** data,learning-driven artificial intelligence,and network-based computing platform)to enable the development of more detailed knowledge to observe and test planet Earth as a *** manuscript contributes to the BED science research domain,by presenting the Virtual Earth Cloud:a multi-cloud framework to support GDE implementation and generate knowledge on environmental and social sustainability.

关键词： Earth observation geosciences digital ecosystem virtual cloud big earth data multi-cloud interoperability science

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Multi-scale hydrological system-of-systems realized through WHOS:the brokering framework

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International Journal of Digital Earth 2022年第1期15卷 1259-1289页

作者： Enrico Boldrini Stefano Nativi Silvano Pecora Igor Chernov Paolo Mazzetti institute of atmospheric pollution research (CNR-IIA) National Research Council of ItalySesto Fiorentino (FI)Italy World Meteorological Organization (WMO) GenevaSwitzerland Ministero della Transizione Ecologica (MITE) RomaItaly

Global Change challenges are now systematically recognized and tackled in a growingly coordinated manner by intergovernmental organizations such as the United *** observing networks provide the founded data sources to assess the Earth environmental status and take sound decisions to achieve a sustainable *** Hydrological Observing System(WHOS)allows to discover and access historical and near real time hydrological *** represents the hydrological contribution to the wider WIGOS-WIS system of *** is a digital ecosystems framework contributed by a set of data providers and technical support *** this framework,three regional pilots were successfully *** WHOS architecture applies the services brokering style,implemented through the Discovery and Access Broker technology.A brokering approach makes a global system of systems possible and sustainable,where the different enterprise systems are enabled to interoperate,despite they implement heterogeneous communication interfaces and data *** this manuscript,the WHOS brokering solution is detailed by recurring to the definition of a set of transversal viewpoints to describe the important aspects of the complex ecosystem–namely:enterprise,information,computational,engineering,and technological ***,the three regional pilot ecosystems are described as successful cases of WHOS implementation.

关键词： Data brokering hydrology system-of-systems interoperability

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Publishing Eurac research data on the GEOSS Platform

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Big Earth Data 2023年第2期7卷 428-450页

作者： Roberto Roncella Bartolomeo Ventura Andrea Vianello Enrico Boldrini Mattia Santoro Paolo Mazzetti Stefano Nativi national research council of italy-institute of atmospheric pollution research Division of Florence-Via Madonna del Piano 10FlorenceItaly institute for Earth Observation Eurac Research-Viale Druso 1BozenItaly Center for Sensing Solution Eurac Research-Viale Druso 1BozenItaly

This paper is the third of a series that introduces some of the main dataset resources presently shared through the GEOSS Platform. The GEOSS Platform is a brokering infrastructure that brokers more than 190 autonomous information systems and data catalogs;it was created to provide the technological tool to implement the Global Earth Observation System of Systems (GEOSS). This manuscript focuses on the analysis of Eurac research datasets and illustrates the data publishing process to enroll the Eurac research Data Provider to the GEOSS Platform through the administrative and technical registrations. The study provides an analysis of the GEOSS user searches for Eurac research data in order to understand the main use of datasets of an important Data Provider.

关键词： GEOSS data interoperability data sharing Eurac research Earth observation

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An integrated approach to investigate climate-driven rockfall occurrence in high alpine slopes: the Bessanese glacial basin, Western Italian Alps

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Journal of Mountain Science 2020年第11期17卷 2591-2610页

作者： VIANI Cristina CHIARLE Marta PARANUNZIO Roberta MERLONE Andrea MUSACCHIO Chiara COPPA Graziano NIGRELLI Guido Department of Earth Sciences University of Torino10125 TorinoItaly research institute for Geo-Hydrological Protection Italian National Research Council10135 TorinoItaly institute of atmospheric Sciences and Climate Italian National Research Council10133 TorinoItaly national institute of Metrological research 10135 TorinoItaly

Rockfalls are one of the most common instability processes in high *** represent a relevant issue,both for the risks they represent for(infra)structures and frequentation,and for their potential role as terrestrial indicators of climate *** study aims to contribute to the growing topic of the relationship between climate change and slope instability at the basin *** selected study area is the Bessanese glacial basin(Western Italian Alps)which,since 2016,has been specifically equipped,monitored and investigated for this *** order to provide a broader context for the interpretation of the recent rockfall events and associated climate conditions,a cross-temporal and integrated approach has been *** this purpose,geomorphological investigations(last 100 years),local climate(last 30 years)and near-surface rock/air temperatures analyses,have been carried *** research outcomes show that rockfalls occurred in two different geomorphological positions:on rock slopes in permafrost condition,facing from NW to NE and/or along the glacier margins,on rock slopes uncovered by the ice in the last *** thaw of the active layer and/or glacier debutressing can be deemed responsible for slope failure *** regard to timing,almost all dated rock falls occurred in *** the July events,initiation may have been caused by a combination of rapid snow melt and enhanced seasonal thaw of the active layer due to anomalous high temperatures,and *** events are,instead,associated with a significant positive temperature anomaly on the quarterly scale,and they can be ascribed to the rapid and/or in depth thaw of the permafrost active *** to our findings,we can expect that in the Bessanese glacierized basin,as in similar high mountain areas,climate change will cause an increase of slope instability in the *** fasten knowledge deepening,we highlight the need for a growth of a network of high elevation

关键词： Rockfalls Climate change Air and rock temperature Periglacial environment Western Italian Alps

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Towards a knowledge base to support global change policy goals

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International Journal of Digital Earth 2020年第2期13卷 188-216页

作者： Stefano Nativi Mattia Santoro Gregory Giuliani Paolo Mazzetti European Commission–DG Joint research Centre Ispra(VA)Italy national research council of italy–institute on atmospheric research pollution Sesto Fiorentino(FI)Italy University of Geneva Institute for Environmental SciencesGenevaSwitzerland UN Environment Science DivisionGRID-GenevaGenevaSwitzerland

In 2015,it was adopted the 2030 Agenda for Sustainable Development to end poverty,protect the planet and ensure that all people enjoy peace and *** year after,17 Sustainable Development Goals(SDGs)officially came into *** 2015,GEO(Group on Earth Observation)declared to support the implementation of *** GEO Global Earth Observation System of Systems(GEOSS)required a change of paradigm,moving from a data-centric approach to a more knowledge-driven *** this end,the GEO System-of-Systems(SoS)framework may refer to the well-known Data-Information-Knowledge-Wisdom(DIKW)*** the context of an Earth Observation(EO)SoS,a set of main elements are recognized as connecting links for generating knowledge from EO and non-EO data–*** and economic *** elements are:Essential Variables(EVs),Indicators and Indexes,Goals and *** generation and use requires the development of a SoS KB whose management process has evolved the GEOSS Software Ecosystem into a GEOSS Social *** includes:collect,formalize,publish,access,use,and update *** project analysed the knowledge necessary to recognize,formalize,access,and use *** analysis recognized GEOSS gaps providing recommendations on supporting global decision-making within and across different domains.

关键词： Knowledge base from data to knowledge essential variables SDGs GEOSS interoperability science big earth data

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One decade(2011–2020)of European agricultural water stress monitoring by MSG-SEVIRI:workflow implementation on the Virtual Earth Laboratory(VLab)platform

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International Journal of Digital Earth 2022年第1期15卷 730-747页

作者： Bagher Bayat Carsten Montzka Alexander Graf Gregory Giuliani Mattia Santoro Harry Vereecken institute of Bio-and Geosciences:Agrosphere (IBG-3) Forschungszentrum Jülich GmbHJülichGermany institute for Environmental Sciences EnviroSPACE labUniversity of GenevaGenevaSwitzerland institute of atmospheric pollution research National Research Council of Italy (CNR)Sesto FiorentinoItaly

Cloud computing facilities can provide crucial computing support for processing the time series of satellite data and exploiting their spatio-temporal information ***,dedicated efforts are still required to develop workflows,executable on cloud-based platforms,for ingesting the satellite data,performing the targeted processes,and generating the desired *** this study,an operational workflow is proposed,based on monthly Evaporative Stress Index(ESI)anomaly,and implemented in cloud-based online Virtual Earth Laboratory(VLab)platform,as a demonstration,to monitor European agricultural water *** this end,daily time-series of actual and reference evapotranspiration(ETa and ET0),from the Spinning Enhanced Visible and Infrared Imager(SEVIRI)sensor,were used to execute the proposed workflow successfully on *** execution of the workflow resulted in obtaining one decade(2011–2020)of European monthly agricultural water stress maps at 0.04˚spatial resolution and corresponding stress reports for each *** support open science,all the workflow outputs are stored in GeoServer,documented in GeoNetwork,and made available through *** enables creating a dashboard for better visualization of the results for *** results from this study demonstrate the capability of VLab platform for water stress detection from time series of SEVIRI-ET data.

关键词： ET SEVIRI ESI water stress workflow Europe VLab demonstration

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