Search results for "viol"
showing 10 items of 2848 documents
Compte rendu de : Christophe Regina, Genre, mœurs et justice. Les Marseillaises et la violence au XVIIIe siècle, Aix-en-Provence, Presses universitai…
2017
International audience
Ultraviolet camera measurements of passive and explosive (Strombolian) sulphur dioxide emissions at Yasur volcano, Vanuatu
2020
Here, we present the first ultraviolet (UV) camera measurements of sulphur dioxide (SO2) flux from Yasur volcano, Vanuatu, for the period 6–9 July 2018. These data yield the first direct gas-measurement-derived calculations of explosion gas masses at Yasur. Yasur typically exhibits persistent passive gas release interspersed with frequent Strombolian explosions. We used compact forms of the “PiCam” Raspberry Pi UV camera system [1,2] powered through solar panels to collect images. Our daily median SO2 fluxes ranged from 4 to 5.1 kg s−1, with a measurement uncertainty of −12.2% to +14.7%, including errors from the gas cell calibration drift, uncertainties in plume direction and distance, and…
Ultraviolet Imaging of Volcanic Plumes: A New Paradigm in Volcanology
2017
Ultraviolet imaging has been applied in volcanology over the last ten years or so. This provides considerably higher temporal and spatial resolution volcanic gas emission rate data than available previously, enabling the volcanology community to investigate a range of far faster plume degassing processes, than achievable hitherto. To date this has covered rapid oscillations in passive degassing through conduits and lava lakes, as well as puffing and explosions, facilitating exciting connections to be made for the first time between previously rather separate sub disciplines of volcanology. Firstly, there has been corroboration between geophysical and degassing datasets at ≈ 1 Hz e…
Emission of bromine and iodine from Mount Etna volcano
2005
[1] Constraining fluxes of volcanic bromine and iodine to the atmosphere is important given the significant role these species play in ozone depletion. However, very few such measurements have been made hitherto, such that global volcanic fluxes are poorly constrained. Here we extend the data set of volcanic Br and I degassing by reporting the first measurements of bromine and iodine emissions from Mount Etna. These data were obtained using filter packs and contemporaneous ultraviolet spectroscopic SO2 flux measurements, resulting in time-averaged emission rates of 0.7 kt yr−1 and 0.01 kt yr−1 for Br and I, respectively, from April to October 2004, from which we estimate global Br and I flu…
Intercomparison of SO2 camera systems for imaging volcanic gas plumes
2015
Abstract SO 2 camera systems are increasingly being used to image volcanic gas plumes. The ability to derive SO 2 emission rates directly from the acquired imagery at high time resolution allows volcanic process studies that incorporate other high time-resolution datasets. Though the general principles behind the SO 2 camera have remained the same for a number of years, recent advances in CCD technology and an improved understanding of the physics behind the measurements have driven a continuous evolution of the camera systems. Here we present an intercomparison of seven different SO 2 cameras. In the first part of the experiment, the various technical designs are compared and the advantage…
Laminar Micrite Crusts and Associated Foreslope Processes, Red Sea
1991
ABSTRACT Forereef slopes in the Red Sea of Sudan exhibit a uniform biozonation that is independent from the topography of the slopes. Below - 120 m, ledges protrude horizontally from sleep cliffs of barrier reefs and atolls as well as from patches of in situ lithified slope sediment on inclined fringing reef slopes. Free surfaces and cavities within these ledges are partly covered by laminar micrite crusts of 7-20 mm thickness. The ledges are formed by an organic framework of living azooxanthellate corals, bryozoans, serpulids and fossil red algae. They are affected by repeated episodes of boring, infilling, and cementation which obliterate much of the original fabric. Concomitant cementati…
Innovación y TIC en el paisaje sonoro de la música festera a través de la creación de musicomovigramas
2019
Este artículo es parte de un proyecto de investigación sobre el paisaje sonoro, la escucha y la creación y recreación de espacios de educación ambiental y musical. Consiste en una propuesta de creación y utilización de un recurso auditivo-didáctico e interactivo, el musicomovigrama o musicograma en movimiento, para trabajar la escucha y el desarrollo emocional mediante la Fiesta y la música de Moros y Cristianos de Alcoy y su paisaje sonoro. La gran potencialidad de este recurso deriva de su capacidad para ofrecer al alumnado un soporte visual atractivo sincronizado con la progresión de la música que escucha, de tal manera que ambos códigos avancen simultáneamente. El objetivo principal es …
Vulcamera: a program for measuring volcanic SO2 using UV cameras
2011
We report here on Vulcamera, a stand-alone program for the determination of volcanic SO2&nbsp; fluxes using ultraviolet cameras. The code enables field image acquisition and all the required post-processing operations.<br />
L’OPACIZZARSI DEL CONFLITTO FRA GIOVANI E ADULTI E L’AFFERMARSI DELLA VIOLENZA FRA PARI
2013
L'ipotesi formulata in questo lavoro riguarda la possibilità che la violenza intra-generazionale ha preso il posto di conflitto intergenerazionale tra i giovani e gli adulti. In altre parole, la violenza non è una modalità di comportamento interpersonale ma il substrato, la base su cui è articolato un insieme complesso di interdipendenze e trasversali azioni e reazioni tra pari. Ne consegue un modello di coesione deviante, che ci permette di affermare che: 1 la violenza esplode senza conflitti o escludendo qualsiasi possibilità di conflitto e della successiva mediazione e negoziazione tra gli attori sono coinvolti nella relazione anzi; 2. La violenza è diventato l'unico "collante" tra giova…
Korelacja międzynarodowego terroryzmu z procesami globalizacji
2019
Problematyka terroryzmu globalnego jest niezmiernie złożonym zagadnieniem, w ramach którego niezbędnym wydaje się w pierwszej fazie wyodrębnić zjawisko terroryzmu, jego źródeł, wskazując jednocześnie na dynamikę wzrostu aktów terroryzmu we współczesnym świecie. Byłoby bardzo trudno zgłębiać to zagadnienie bez uwzględnienia procesów globalizacji, które stymulując rozwój cywilizacyjny, technologiczny współczesnego świata, jednocześnie staje się dla grup terrorystycznych nośnikiem wykorzystywanym w opanowywaniu nowych terytoriów zbrodniczej, terrorystycznej działalności. Zwrócić należy uwagę na fakt, że jeżeli w przeszłości dominował terroryzm nacjonalistyczny, narodowościowy, czy rewolucyjny,…