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Ocean color measured by satellite-mounted optical sensors is an essential climate variable that is routinely used as a central element for assessing the health and productivity of marine ecosystems and the role of oceans in the global carbon cycle. For satellite ocean color to be reliable and used in these and other important environmental applications, the data must be trustworthy and high quality. Pre-flight and on-board calibration of satellite ocean color sensors is conducted; however, once in orbit, the data quality can only be fully assessed via independent calibration and validation activities using surface measurements. These measurements therefore need to be at least as high quality as the satellite data, which necessitates SI traceability and a full uncertainty budget. This is the basis for fiducial reference measurements (FRMs) and the FRM4SOC project, which was an European Space Agency (ESA) initiative to establish and maintain SI-traceable ground-based FRM for satellite ocean color, thus providing a fundamental contribution to the European system for monitoring the Earth (Copernicus). This Special Issue of MDPI Remote Sensing is designed to showcase this essential Earth observation work through the publication of the project’s main achievements and results accompanied by other select relevant articles.

Research & information: general --- VIIRS --- SNPP --- NOAA-20 --- DINEOF --- ocean color data --- data merging --- gap-filling --- ocean color radiometers --- radiometric calibration --- indoor intercomparison measurement --- agreement between sensors --- measurement uncertainty --- field intercomparison measurement --- Hyperspectral reflectance --- validation --- autonomous measurements --- ground-truth data --- system design --- downwelling irradiance --- satellite validation --- Fiducial Reference Measurements --- water reflectance --- satellite --- calibration --- solar diffusor --- SDSM --- desert trend --- lunar calibration --- RVS --- MODIS --- Aqua --- ocean color --- water-leaving radiance --- atmospheric correction --- Sentinel-3 OLCI --- Copernicus --- ocean colour --- system vicarious calibration --- fiducial reference measurement --- Lampedusa --- MOBY --- MarONet --- radiometry --- research infrastructure --- uncertainty budget --- satellite ocean colour --- fiducial reference measurements (FRM) --- calibration and validation --- SI traceability and uncertainty --- European Space Agency (ESA) --- Committee for Earth Observation Satellites (CEOS) --- fiducial reference measurements --- SI-traceability --- Mediterranean Sea --- BOUSSOLE --- MSEA --- hyper-temporal dataset --- optical radiometry --- coastal environment --- observation geometry --- remote sensing reflectance --- ocean colour radiometers --- TriOS RAMSES --- Seabird HyperSAS --- field intercomparison --- AERONET-OC --- Acqua Alta Oceanographic Tower --- remote sensing --- spectral irradiance comparison --- spectral radiance sources comparison

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The book, "Intelligent Sensors for Human Motion Analysis," contains 17 articles published in the Special Issue of the Sensors journal. These articles deal with many aspects related to the analysis of human movement. New techniques and methods for pose estimation, gait recognition, and fall detection have been proposed and verified. Some of them will trigger further research, and some may become the backbone of commercial systems.

Technology: general issues --- History of engineering & technology --- gait recognition --- biometrics --- regularized discriminant analysis --- particle swarm optimization --- grey wolf optimization --- whale optimization algorithm --- FMCW --- vital sign --- XGBoost --- MFCC --- COVID-19 --- 3D human pose estimation --- deep learning --- generalization --- optical sensing principle --- modular sensing unit --- plantar pressure measurement --- gait parameters --- 3D human mesh reconstruction --- deep neural network --- motion capture --- neural networks --- reconstruction --- gap filling --- FFNN --- LSTM --- BILSTM --- GRU --- pose estimation --- movement tracking --- computer vision --- artificial intelligence --- markerless motion capture --- assessment --- kinematics --- development --- machine learning --- human action recognition --- features fusion --- features selection --- recognition --- fall risk detection --- balance --- Berg Balance Scale --- human tracking --- elderly --- telemedicine --- diagnosis --- precedence indicator --- knowledge measure --- fuzzy inference --- rule induction --- posture detection --- aggregation function --- markerless --- human motion analysis --- gait analysis --- data augmentation --- skeletal data --- time series classification --- EMG --- pattern recognition --- robot --- cyber-physical systems --- RGB-D sensors --- human motion modelling --- F-Formation --- Kinect v2 --- Azure Kinect --- Zed 2i --- socially occupied space --- facial expression recognition --- facial landmarks --- action units --- convolutional neural networks --- graph convolutional networks --- artifact classification --- artifact detection --- anomaly detection --- 3D multi-person pose estimation --- absolute poses --- camera-centric coordinates --- deep-learning --- n/a

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This book is a selection of manuscripts devoted to the conservation and preservation of wooden cultural heritage. The articles present the new methods for conservation of various historical wooden artefacts, reliable modern techniques for characterisation of the wood structure, properties and degree of degradation, and discusses problems and doubts related to all aspects of conservation and re-conservation of wooden cultural heritage. It contains both review and research papers to give the readers a broader picture of the problems and issues related to the conservation of wooden historical objects and structures. We need to remember that wooden cultural heritage is an integral part of our culture and history that define our humanity. We are obliged to protect it, save it from oblivion, and preserve it for future generations.

The arts --- X-ray photoelectron spectroscopy (XPS) --- X-ray diffraction (XRD) --- dynamic vapor sorption (DVS) --- archaeological wood --- wood conservation and preservation --- piles --- waterlogged wood --- soft rot --- decay --- microscopy --- degraded wood --- silane --- FT-IR --- alkoxysilanes --- wood-silane interactions --- wood stabilisation --- wood conservation --- silane treatment --- reliquary --- electron microscopy --- wood --- restoration --- halloysite nanotubes --- Nanhai No. 1 shipwreck --- waterlogged archaeological wood (WAW) --- wood properties --- microbial composition --- gap-fillers --- gap-filling materials --- wooden artefacts --- wood exposed outdoors --- microballoons --- resins --- glass beads --- cellulose powder --- binders --- hygrothermal performance --- timber buildings --- cultural heritage --- numerical simulations --- monitoring and sensors --- climate models --- fungi identification --- mold growth modelling --- soda lignin --- penetration --- infrared spectroscopy (ATR-FTIR) --- pyrolysis gas chromatography mass spectrometry (Py-GC/MS) --- scanning electron microscopy (SEM) --- historical wood --- wood degradation --- artefact --- heritage --- conservation --- cultural conservator --- consolidation --- sorption --- degradation --- drying --- PEG --- alum --- reburial --- in situ preservation --- medieval shipwreck --- charred wood --- chemical analysis --- EDS --- FTIR --- XRD --- proximate analysis --- PEG treatment --- acetic acid --- volatile emissions --- GC–MS --- marine archaeological wood --- moisture content --- polyethylene glycol --- computational modelling --- Mary Rose --- predictive model --- archaeological wooden structures --- structural analysis --- geodetic systems --- drying process --- heritage wood --- sustainability --- bio-based polymers --- consolidants

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This book is a selection of manuscripts devoted to the conservation and preservation of wooden cultural heritage. The articles present the new methods for conservation of various historical wooden artefacts, reliable modern techniques for characterisation of the wood structure, properties and degree of degradation, and discusses problems and doubts related to all aspects of conservation and re-conservation of wooden cultural heritage. It contains both review and research papers to give the readers a broader picture of the problems and issues related to the conservation of wooden historical objects and structures. We need to remember that wooden cultural heritage is an integral part of our culture and history that define our humanity. We are obliged to protect it, save it from oblivion, and preserve it for future generations.

X-ray photoelectron spectroscopy (XPS) --- X-ray diffraction (XRD) --- dynamic vapor sorption (DVS) --- archaeological wood --- wood conservation and preservation --- piles --- waterlogged wood --- soft rot --- decay --- microscopy --- degraded wood --- silane --- FT-IR --- alkoxysilanes --- wood-silane interactions --- wood stabilisation --- wood conservation --- silane treatment --- reliquary --- electron microscopy --- wood --- restoration --- halloysite nanotubes --- Nanhai No. 1 shipwreck --- waterlogged archaeological wood (WAW) --- wood properties --- microbial composition --- gap-fillers --- gap-filling materials --- wooden artefacts --- wood exposed outdoors --- microballoons --- resins --- glass beads --- cellulose powder --- binders --- hygrothermal performance --- timber buildings --- cultural heritage --- numerical simulations --- monitoring and sensors --- climate models --- fungi identification --- mold growth modelling --- soda lignin --- penetration --- infrared spectroscopy (ATR-FTIR) --- pyrolysis gas chromatography mass spectrometry (Py-GC/MS) --- scanning electron microscopy (SEM) --- historical wood --- wood degradation --- artefact --- heritage --- conservation --- cultural conservator --- consolidation --- sorption --- degradation --- drying --- PEG --- alum --- reburial --- in situ preservation --- medieval shipwreck --- charred wood --- chemical analysis --- EDS --- FTIR --- XRD --- proximate analysis --- PEG treatment --- acetic acid --- volatile emissions --- GC–MS --- marine archaeological wood --- moisture content --- polyethylene glycol --- computational modelling --- Mary Rose --- predictive model --- archaeological wooden structures --- structural analysis --- geodetic systems --- drying process --- heritage wood --- sustainability --- bio-based polymers --- consolidants