Search results for "Oration"
showing 10 items of 2042 documents
Marginal integrity of class V restorations: SEM versus dye penetration.
2006
To perform an in vitro investigation on the marginal integrity of different adhesives (Optibond FL, Scotchbond 1XT, Clearfil SE Bond, Adper Prompt L-Pop, S(3) Bond, iBond exp., Adper Prompt L-Pop) in combination with Tetric Ceram as well as an experimental silorane-restorative (Hermes, Hermes Bond; 3M ESPE) using SEM and dye penetration (2% methylene blue) in a comparative manner.Standardized class V-cavities (3 mm x 1.5 mm) were prepared in 70 extracted human teeth (n=10). The adhesives were applied according to manufacturers' instructions. The cavities were restored with three increments. After finishing and polishing (Sof-Lex discs) and thermocycling (5000x, 5/55 degrees C), replicas wer…
Influence of surface processes and initial topography on lateral fold growth and fold linkage mode
2015
Elongation of randomly distributed fold segments and their potential linkage are important for hydrocarbon exploration because it can greatly influence the morphology of the reservoir and both migration and accumulation of hydrocarbons in antiformal traps. Here we study the effects of surface processes and the presence of a topographic slope on the different linkage modes that can occur, and how these parameters affect the required horizontal offset for perturbations to link. The proposed numerical model represents a sedimentary cover detached over a much weaker basal decollement layer. The upper surface is modified by mass redistribution, which is achieved by a combination of fluvial and h…
La chevalerie, de la société d'ordres aux ordres républicains
2003
L'évaluation du Plan Réussite en Licence : quelles actions pour quels effets ? : Analyse sur les résultats des étudiants en première année universita…
2013
En ligne sur : http://www.recherches-en-education.net/IMG/pdf/REE-no15.pdf; International audience; Le premier cycle à l'université est caractérisé en France par une faible efficacité interne (proportion importante d'échecs et d'abandons notamment). En 2007, les pouvoirs publics annoncent le " Plan Réussite en Licence " (PRL) afin de réduire notamment le taux d'échec en première année. Cet article vise à évaluer l'efficacité des actions menées dans le cadre du PRL sur les résultats obtenus par les étudiants en première année. L'originalité de cette recherche tient non seulement dans le caractère novateur des analyses effectuées (peu de recherches sur l'efficacité du PRL), mais également à l…
Retour sur quelques facteurs favorisant l'orientation
2017
International audience
Unveiling the strong interaction among hadrons at the LHC
2020
One of the key challenges for nuclear physics today is to understand from first principles the effective interaction between hadrons with different quark content. First successes have been achieved using techniques that solve the dynamics of quarks and gluons on discrete space-time lattices1,2. Experimentally, the dynamics of the strong interaction have been studied by scattering hadrons off each other. Such scattering experiments are difficult or impossible for unstable hadrons3–6 and so high-quality measurements exist only for hadrons containing up and down quarks7. Here we demonstrate that measuring correlations in the momentum space between hadron pairs8–12 produced in ultrarelativistic…
Ecclesia carinensis. Una sede episcopale alle origini del cristianesimo fra Palermo e Lilibeo; La catacomba paleocristiana di Villagrazia di Carini
2020
The Early Christian cemetery discovered by chance in Villagrazia di Carini in 1899, then forgotten and negletted, has been brought to light from the year 2000 to today thanks to the systematic teamwork of the University of Palermo and the Pontificia Commissione di Archeologia Sacra (PCAS). The unexpected dimension of the site, the largest underground cemetery of Early Christianity so far known in western Sicily, has finally allowed the historiographical debate to find a meeting point on the age-old problem of the existence of ecclesia carinensis, an Early Byzantine diocese attested by the written sources up to the eighth century and disappeared after the centuries of the Islamic domination …
Soil Water Content Assessment: Critical Issues Concerning the Operational Application of the Triangle Method
2015
Knowledge of soil water content plays a key role in water management efforts to improve irrigation efficiency. Among the indirect estimation methods of soil water content via Earth Observation data is the triangle method, used to analyze optical and thermal features because these are primarily controlled by water content within the near-surface evaporation layer and root zone in bare and vegetated soils. Although the soil-vegetation-atmosphere transfer theory describes the ongoing processes, theoretical models reveal limits for operational use. When applying simplified empirical formulations, meteorological forcing could be replaced with alternative variables when the above-canopy temperatu…
Do soils exist outside Earth?
2010
Abstract On Earth, soils form thanks to the combined action of at least five factors: parent rock, climate, topography, biota, and time. However, the necessity of biota as unavoidable soil forming factor is debated, as important parts of our planet experiencing extreme climates host virtually life-free soils with advanced horizonation. Now that space exploration has greatly expanded our understanding of the Solar System, providing consistent evidences that the loose, unconsolidated "skin" of some nearby rocky bodies is lifeless, it is time to establish if the latter can be considered to be soil in a pedological sense. Our feeling is that, since the concept of soil chiefly bases on the occur…
Forest Naturalness in Northern Europe: Perspectives on Processes, Structures and Species Diversity
2011
Saving the remaining natural forests in northern Europe has been one of the main goals to halt the ongoing decline of forest biodiversity. To facilitate the recognition, mapping and efficient conservation of natural forests, there is an urgent need for a general formulation, based on ecological patterns and processes, of the concept of âforest naturalnessâ. However, complexity, structural idiosyncracy and dynamical features of unmanaged forest ecosystems at various spatio-temporal scales pose major challenges for such a formulation. The definitions hitherto used for the concept of forest naturalness can be fruitfully grouped into three dimensions: 1) structure-based concepts of natural …