Search results for "computing"
showing 10 items of 25279 documents
Monte Carlo Simulations of Parallel Charged Platelets as an Approach to Tactoid Formation in Clay
2013
The free energy of interaction between parallel charged platelets with divalent counterions has been calculated using Monte Carlo simulations to investigate the electrostatic effects on aggregation. The platelets are primarily intended to represent clay particles. With divalent counterions, the free energy for two platelets or two tactoids (clusters of parallel platelets) shows a minimum at a short separation due to the attraction caused by ion-ion correlations. In a salt-free system, the free energy of interaction has a long-range repulsive tail beyond the minimum. The repulsion increases for tactoids with larger aggregation numbers, whereas the depth of the free-energy minimum is graduall…
The iron-regulatory hormone hepcidin: A possible therapeutic target?
2015
The maintenance of stable extracellular and intracellular iron concentrations requires the coordinated regulation of iron transport into plasma. Iron is a fundamental cofactor for several enzymes involved in oxidation-reduction reactions. The redox ability of iron can lead to the production of oxygen free radicals, which can damage various cellular components. Therefore, the appropriate regulation of systemic iron homeostasis is decisive in vital processes. Hepcidin has emerged as the central regulatory molecule of systemic iron homeostasis. It is synthesized in hepatocytes and in other cells and released into the circulation. It inhibits the release of iron from enterocytes of the duodenum…
Enriching primary student teachers’ conceptions about science teaching : Towards dialogic inquiry-based teaching
2011
Inquiry-based teaching has been at the heart of science education since it was first outlined in national standards over a decade ago. The general idea behind the inquiry guidelines is that pupils would adopt ways of conducting science, in addition to conceptually learning, thus attaining also the epistemological dimension of science. Although curricula are based on these ideas of inquiry, all too often authentic inquiry is hindered by overly authoritative approaches and teacher directions. To avoid this, the communicational ways in which teachers can encourage pupil reasoning during different phases of inquiry should be explicitly addressed. This paper addresses this gap by introducing a d…
PRIMARY SCHOOL STUDENT TEACHERS´ CLASSROOM TALK DURING INQUIRY-BASED BIOLOGY LESSONS
2016
Article
Les moins de 30 ans en Gironde, regards croisés entre insertion et RSA
2018
Entre études supérieures, exclusion, intérim, chômage et réorientation, l’insertion professionnelle des jeunes est un processus de moins en moins linéaire et prévisible. Les récents débats autour de la « désincitation au travail » ont entraîné la refonte d’une partie du système de protection sociale en conditionnant l’aide publique à l’emploi, et ce de manière encore plus stricte lorsqu’il s’agit de l’octroyer à un(e) jeune de moins de 30 ans. Cette mutation de l’État social s’appuie sur une nouvelle perception de la solidarité dite « active », dont un des dispositifs les plus symboliques est le Revenu de solidarité active (RSA). En s’intéressant à la fois aux jeunes non-insérés et à ceux a…
Anthropology as a necessary approach for consumer insights - the example of eating and drinking practices in Brazil,
2013
International audience
Les instruments fiscaux de la RSE
2013
National audience
Le trait 68. Insubordinations graphiques et contestations politiques (1968-1977)
2018
International audience
Glucose excites hypothalamic neurons through the activation of Transient Receptor Potential Canonical (TRPC) channels
2015
International audience
Octave Spanning Supercontinuum in Titanium Dioxide Waveguides
2018
International audience; We report on the experimental generation of an octave-spanning supercontinuum in a 2.2 cm-long titanium dioxide optical waveguide with two zero dispersion wavelengths. The resulting on-chip supercontinuum reaches the visible wavelength range as well as the mid-infrared region by using a femtosecond fiber laser pump at 1.64 µm.