Search results for "action"

Ultra-High Energy Neutrinos at the Pierre Auger Observatory

2013

The observation of ultrahigh energy neutrinos (UHE nu s) has become a priority in experimental astroparticle physics. UHE nu s can be detected with a variety of techniques. In particular, neutrinos can interact in the atmosphere (downward-going nu) or in the Earth crust (Earth-skimming nu), producing air showers that can be observed with arrays of detectors at the ground. With the surface detector array of the Pierre Auger Observatory we can detect these types of cascades. The distinguishing signature for neutrino events is the presence of very inclined showers produced close to the ground (i.e., after having traversed a large amount of atmosphere). In this work we review the procedure and …

Experimental Constraints on the Deep Magma Feeding System at StromboliVolcano, Italy

2009

International audience; New experiments have been performed on a high-K basalt (PST-9) from Stromboli volcano, Italy, to constrain the physical conditions of golden pumice magmas at their storage level and discuss their petrogenesis. Fluid-present, H2O- and CO2-bearing, near-liquidus experiments were performed at 11508C between 100 and 400MPa and under oxidizing conditions. Glasses were analyzed by Fourier transform IR spectroscopy and their H2O and CO2 concentrations compared with those in glass inclusions.Most glass inclusions cluster near the 200MPa isobar, suggesting entrapment at a depth of ~8 km. Golden pumice magmas have viscosities of 7.9 Pa s and densities of 2.48-2.57 g/cm3. Compo…

Experimental Evolution Reveals a Genetic Basis for Membrane-Associated Virus Release

2021

Many animal viruses replicate and are released from cells in close association to membranes. However, whether this is a passive process or is controlled by the virus remains poorly understood. Importantly, the genetic basis and evolvability of membrane-associated viral shedding have not been investigated. To address this, we performed a directed evolution experiment using coxsackievirus B3, a model enterovirus, in which we repeatedly selected the free-virion or the fast-sedimenting membrane-associated viral subpopulations. The virus responded to this selection regime by reproducibly fixing a series of mutations that altered the extent of membrane-associated viral shedding, as revealed by fu…

Ultra-high temperature metamorphism recorded in Fe-rich olivine-bearing migmatite from the Khondalite Belt, North China Craton

2018

International audience; We document the first occurrence of Fe‐rich olivine‐bearing migmatitic metapelite in the Khondalite Belt, North China Craton. Petrological analyses revealed two exotic assemblages of orthopyroxene+spinel+olivine and orthopyroxene+spinel+cordierite. Phase relation modelling suggests that these assemblages are diagnostic of ultra‐high temperature (UHT) metamorphism in the Fe‐rich system, with temperatures from 1,000 to 1,050°C at 0.6 GPa. U–Th–Pb SIMS analyses on zircon reveal a similar age of c. 1.92 Ga for the olivine‐bearing migmatite and an adjacent gabbronoritic intrusion that is therefore identified as the heat source for the UHT metamorphism. These results, coup…

La "salle du moulin" à la forge de l'abbaye de Fontenay

1996

P. Benoit et L. Pressouyre; International audience

Supportive Communication in the Workplace

2019

Supportive communication is a form of social interaction that produces resources with which to solve situational problems and manage emotional strain. Through the management of uncertainty, supportive communication enhances the perception of personal control over life events and strengthens the perception of acceptance. It is enacted in the seeking of support, in providing support, and in supportive listening as a form of emotional and informational support. In the workplace, supportive communication is crucially important: It promotes productive work and employees’ well-being as well as job satisfaction and engagement in the organization. This chapter presents the foundations of supportive…

Koulukiusaaminen : loukkaavat vuorovaikutusprosessit oppilaiden vertaissuhteissa

2012

Labour market dynamics in the Nordic countries according to the chain reaction theory

2009

The Promise and Deception of Participation in Welfare Services for Unemployed Young People

2018

This study examined the role of welfare services in the participative citizenship of young people under 30 years of age outside the labour market. Thematic content analysis of the government’s white papers regarding participation policies, as well as participatory action research projects in two Finnish towns, were used to identify factors that enable or hinder participation for this group of service users. The paradigm of participation was critically examined with reference to the theoretical framework of Max Horkheimer and Theodor Adorno’s “dialectic of Enlightenment”, which proposes the parallel existence of the promise and the deception of Enlightenment. The results indicated that user …

Observation of the Early Structural Changes Leading to the Formation of Protein Superstructures.

2014

Formation of superstructures in protein aggregation processes has been indicated as a general pathway for several proteins, possibly playing a role in human pathologies. There is a severe lack of knowledge on the origin of such species in terms of both mechanisms of formation and structural features. We use equine lysozyme as a model protein, and by combining spectroscopic techniques and microscopy with X-ray fiber diffraction and ab initio modeling of Small Angle X-ray Scattering data, we isolate the partially unfolded state from which one of these superstructures (i.e., particulate) originates. We reveal the low-resolution structure of the unfolded state and its mechanism of formation, hi…