Search results for "Sphere"
showing 10 items of 2121 documents
Reseach data of a dissertation "Endosphere microbial community assemblage of an inland sand dune colonizing plant"
2016
Dataset of a dissertation.
La politisation de l'ordinaire : Enjeux et limites de la mobilisation numérique
2015
This article examines the politicization processes of ordinary digital practices as well as its role in the constitution of new protester groups. Its interest is also represented by the construction of an original theoretical framework aiming to underline the complementarity between different theoretical perspectives. By encouraging a connection between the sociology of social movements, the critical Theory and the studies of “information practices”, the author elaborates a new approach to mobilisation focused on the emergence of a more and more citizen's engaged position with regard to the “information world” and not only based on militant uses of the media. While claiming a critical appro…
SMOS-IC: An Alternative SMOS Soil Moisture and Vegetation Optical Depth Product
2017
© 2017 by the authors. The main goal of the Soil Moisture and Ocean Salinity (SMOS) mission over land surfaces is the production of global maps of soil moisture (SM) and vegetation optical depth (τ) based on multi-angular brightness temperature (TB) measurements at L-band. The operational SMOS Level 2 and Level 3 soil moisture algorithms account for different surface effects, such as vegetation opacity and soil roughness at 4 km resolution, in order to produce global retrievals of SM and τ. In this study, we present an alternative SMOS product that was developed by INRA (Institut National de la Recherche Agronomique) and CESBIO (Centre d'Etudes Spatiales de la BIOsphère). One of the main go…
Prácticas deliberativas, argumentación y pluralismo cívico en la Democracia republicana
2011
La esfera pública constituye el lugar donde la ciudadanía demanda, reclama y discute cualquier decisión política que concierne a sus intereses, sin embargo hemos visto como este modelo democrático participativo se soslaya, lo cual hace que se disminuya la vida política activa de la ciudadanía, para mejorar necesitamos que nuestras instituciones políticas deben de ser rediseñadas para facilitar una mayor comunicación y deliberación democrática, con nuevos paradigmas políticos enfatizados en políticas deliberativas. Precisamos de una reforma democrática que gire hacia un modelo más deliberativo, que fusione los esfuerzos de actores públicos y privados colocando al razonamiento público en el…
Total volatile flux from Mount Etna
2008
[1] The Total Volatile (TV) flux from Mount Etna volcano has been characterised for the first time, by summing the simultaneously-evaluated fluxes of the three main volcanogenic volatiles: H2O, CO2 and SO2. SO2 flux was determined by routine DOAS traverse measurements, while H2O and CO2 were evaluated by scaling MultiGAS-sensed H2O/SO2 and CO2/SO2 plume ratios to the UV-sensed SO2 flux. The time-averaged TV flux from Etna is evaluated at ∼21,000 t·day−1, with a large fraction accounted for by H2O (∼13,000 t·day−1). H2O dominates (≥70%) the volatile budget during syn-eruptive degassing, while CO2 and H2O contribute equally to the TV flux during passive degassing. The CO2 flux was observed to…
Halogens in volcanic systems
2009
The transport, degassing and atmospheric release of halogens from active volcanism on Earth have been the 12 focus of increasing interest over the last few decades, and have recently been the subject of the 1st workshop 13 on “Halogens in volcanic systems and their environmental impacts” that was held in December of 2007 at 14 Yosemite Lodge in Yosemite National Park, California. As an introduction to this Chemical Geology special 15 issue, collecting contributions from many of the participants at the workshop, we review here recent 16 advances in this field, including experimental and theoretical investigations of halogen behaviour in volcanic 17 and related magmatic systems. We discuss pr…
Recent advances in ground-based ultraviolet remote sensing of volcanic SO2 fluxes
2011
Measurements of volcanic SO2 emission rates have been the mainstay of remote-sensing volcanic gas geochemistry for almost four decades, and they have contributed significantly to our understanding of volcanic systems and their impact upon the atmosphere. The last ten years have brought step-change improvements in the instrumentation applied to these observations, which began with the application of miniature ultraviolet spectrometers that were deployed in scanning and traverse configurations, with differential optical absorption spectroscopy evaluation routines. This study catalogs the more recent empirical developments, including: ultraviolet cameras; wide-angle field-of-view differential …
First multi-GAS based characterisation of the Boiling Lake volcanic gas (Dominica, Lesser Antilles)
2013
We used a Multi-component Gas Analyser System (Multi-GAS) to measure, for the very first time, the composition (H2O, CO2, H2S, SO2) of the volcanic gas plume issuing from the Boiling Lake, a vigorously degassing, hot (T ~ 80-90°C) volcanic lake in Dominica, West Indies. The Multi-GAS captured in-plume concentrations of H2O, CO2 and H2S were well above those typical of ambient atmosphere, while no volcanic SO2 was detected (<0.05 ppm). These were used to derive the Boiling Lake plume characteristic ratios of CO2/H2S (5.2±0.4) and H2O/CO2 (31.4±6). Assuming that other volcanic gas species (e.g., HCl, CO, H2, N2, etc.) are absent in the plume, we recalculated a (air-free) composition fo…
Protons for Jehovah’s Witnesses? How press coverage of Ashya King’s case brought proton beam therapy to the public arena
2018
The case of Ashya King, the child brain tumour patient whose parents took from a British hospital so he could be treated with Proton Beam Therapy (PBT) abroad, contributed to popularize that technology among a general audience. Through the content analysis of British and Spanish press coverage (N=329), our research shows that proton therapy enjoyed scarce coverage in the analysed media before Ashya King’s case. His story, magnified due to the fact that his parents were Jehovah’s witnesses was a cause both for public concern and media sensationalism. We show that the case brought PBT into the public sphere and, consequently, contributed to create a demand for facilities that offered this the…
MR 2831984 Reviewed Masuda T. Families of finite coverings of the Riemann sphere. Osaka J. Math. 48 (2011), no. 2, 515--540. (Reviewer Francesca Vetr…
2012
Let $G$ be a finite group and let $H$ be a subgroup of $G$ which does not contain normal subgroups of $G$ except $\{ id \}$. The group $G$ acts on the set of the left coset of $G / H$ as follows: \begin{center} $(g, H a) \rightarrow H a g^{- 1}$. \end{center} The author observes that the action defined above is effective and this gives a permutation representation of $G$, $R: G \rightarrow S_{d}$, where $d =[G : H]$. The condition on $H$ ensures that $R$ is injective. Thus, $G$ can be seen as a transitive subgroup of $S_{d}$. Let $X$ and $ Y$ be connected complex varieties. A finite covering $f: X \rightarrow Y$, which branches at most at $B$, is said a $(G, H)-$coverings if there is a surj…