Search results for " Dio"

showing 4 items of 1714 documents

New Techniques for real-time volcanic gas measurements: the UV camera

2012

In this study, I take advantage of a novel technique - the UV camera - to image SO2 emissions from the Italian volcanoes with improved high temporal resolution. Here, this technique has been updated to a new configuration (dual-camera system), which combines higher temporal resolution (0.5-1.2 Hz) and improved accuracy relative to the single-camera setup. The methodology has been extensively tested and improved, whilst developing a user-friendly control software (Vulcamera) and a calibration technique (in tandem DOAS-SO2 quartz cells calibration), which simplify instrument deployment, acquisition and data analysis. A first application was focused on SO2 gas flux measurements at individual fuma…

volcanic degassing UV camera Vulcano island Stromboli island mount Etna sulphur dioxide gas fluxSettore GEO/08 - Geochimica E Vulcanologia
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A Low-Cost Smartphone Sensor-Based UV Camera for Volcanic SO2 Emission Measurements

2017

Recently, we reported on the development of low-cost ultraviolet (UV) cameras, based on the modification of sensors designed for the smartphone market. These units are built around modified Raspberry Pi cameras (PiCams; ≈USD 25), and usable system sensitivity was demonstrated in the UVA and UVB spectral regions, of relevance to a number of application areas. Here, we report on the first deployment of PiCam devices in one such field: UV remote sensing of sulphur dioxide emissions from volcanoes; such data provide important insights into magmatic processes and are applied in hazard assessments. In particular, we report on field trials on Mt. Etna, where the utility of these devices in quantif…

volcanic gas emissionsgeographygeography.geographical_feature_category010504 meteorology & atmospheric sciencesvolcano monitoringRaspberry Pilow-cost ultraviolet camera010502 geochemistry & geophysicsUSable01 natural sciences7. Clean energyRaspberry piVolcanoApplication areassulphur dioxideGeneral Earth and Planetary SciencesEnvironmental sciencelcsh:QSO<sub>2</sub> camera; Raspberry Pi; low-cost ultraviolet camera; volcanic gas emissions; sulphur dioxide; volcano monitoringlcsh:ScienceSO2 camera0105 earth and related environmental sciencesRemote sensingRemote Sensing
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MOBILITY OF MERCURY IN THE VOLCANIC/GEOTHERMAL AREA OF NISYROS (GREECE)

2017

Το καλοκαίρι του 2013, προσδιορίστηκαν οι συγκεντρώσεις υδραργύρου στο έδαφος και τον αέρα του ενεργού ηφαιστείου της Νισύρου (Ελλάδα), το οποίο ανήκει στο ενεργό ηφαιστειακό τόξο του νοτίου Αιγαίου. 102 δείγματα εδάφους συλλέχθηκαν και 2119 αναλύθηκαν για υδράργυρο με τη χρήση ψυχρού ατμού ατομικής απορρόφησης αναλυτή, σύμφωνα με τη μέθοδο ΕΡΑ 7473. Ταυτόχρονα, στα ίδια σημεία πραγματοποιήθηκαν συγκεντρώσεις υδραργύρου στον αέρα, με φορητό φασματοφωτόμετρο (Lumex RA- 915M). Οι τιμές των εδαφικών συγκεντρώσεων υδραργύρου κυμαίνονται από 0.023 έως 13.7 mg/g. Οι συγκεντρώσεις υδραργύρου στον αέρα έδειξαν υψηλότερες τιμές υποβάθρου στην περιοχή Λακκί της καλδέρας, μεταξύ 21 και 36 ng/m3 και μέ…

ατμοσφαιρικός υδράργυροςυδροθερμικά αέριαatmospheric mercurycarbon dioxidesoil mercury atmospheric mercury hydrothermal gases carbon dioxide hydrogen sulphide010501 environmental sciences010502 geochemistry & geophysics01 natural sciencesεδαφικός υδράργυροhydrothermal gasesυδρόθειοMaterials Chemistrysoil mercuryTheologyδιοξείδιο του άνθρακαhydrogen sulphideGeomorphologyGeology0105 earth and related environmental sciencesBulletin of the Geological Society of Greece
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Исследование собственных дефектов и их роли в электронных процессах в стеклообразном и кристаллическом кремнеземе

1980

Advisor: Силинь, А

КремнеземSolid state physicsCietvielu fizikaКремнезем - дефектыФизика твердого телаSilicate glassStikla fizikaКремнезем - электронные процессыSilīcija dioksīdsGlassСтеклообразующие системы:NATURAL SCIENCES::Physics::Atomic and molecular physics::Molecular physics [Research Subject Categories]Стеклообразный кремнезем
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