Search results for "production [meson]"

IM-5 zeolite for steam catalytic cracking of naphtha to produce propene and ethene. An alternative to ZSM-5 zeolite

2013

Steam catalytic cracking of naphtha in smaller FCC units can be considered an option to produce more ethene and propene. These units will operate at high reaction temperatures and in the presence of steam. The profitability of these units could be improved with the use of new catalysts with higher activity and hydrothermal stability, without compromising the selectivity to light olefins. We have explored the possibilities of IM-5 zeolite for high temperature steam catalytic cracking (SCC) of a naphtha, as an alternative to commonly used ZSM-5 zeolite. So, we compare the catalytic activity, the effect of operating variables of the process and the yields of interest products between the two z…

Quantification de l’ablation d’un bassin versant marno-calcaire alpin durant le Petit Age Glaciaire par l’étude d’un système lacustre (cas du lac du «…

2002

Measurements of present-day erosion may give heterogeneous results according to the methods used. This article proposes an approach to erosion during the Little Ice Age by the quantitative analysis of detritical materials trapped in a dammed lake. This infill is recognized through two drillings, and these specific observations are supplemented by a seismic reflexion survey which provided a reliable estimate of the geometry of the lake infill. The sedimentary production is calculated from three pieces of data: (1) the surface of the drainage area, (2) duration of the lake system activity and (3) the volume of trapped sediments. From the three determined variables, we propose a detritical product…

Narrow Structure in the Excitation Function of eta Photoproduction off the Neutron

2013

The photoproduction of $\eta$-mesons off nucleons bound in $^2$H and $^3$He has been measured in coincidence with recoil protons and recoil neutrons for incident photon energies from threshold up to 1.4 GeV. The experiments were performed at the Mainz MAMI accelerator, using the Glasgow tagged photon facility. Decay photons from the $\eta\rightarrow 2\gamma$ and $\eta\rightarrow 3\pi^0$ decays and the recoil nucleons were detected with an almost $4\pi$ electromagnetic calorimeter combining the Crystal Ball and TAPS detectors. The data from both targets are of excellent statistical quality and show a narrow structure in the excitation function of $\gamma n\rightarrow n\eta$. The results from…

Statistical performance of a multiclass bulk production queueing system

2004

Abstract In this paper, we discuss how to statistically analyze a make-to-stock production system the behaviour of which depends on a multiclass bulk queueing system. The performance of the system is evaluated in terms of the different demands of products, processing times and, mainly, through the finished product inventory and other related measures that quantify the queueing effects in the system. A numerical example which illustrates the applicability of the results in an inventory scenario is also discussed.

Capital humain et compétences de base des adultes : production et valorisation

2013

Basic skills are important in current policies because of high costs generated by illiteracy and supported by the society. The aim of the present thesis is to bring a new contribution on this thematic in a microeconomic approach. It consists of two parts. The first one concerns the valorization of basic skills on the labor market, through chapters 1 and 2, while the second one concerns the production of French skills according to the migratory origins, through chapters 3 and 4. Chapter 1 is about the returns to basic skills on the labor market, in terms of overeducation/undereducation and in terms of wages. The central hypothesis is to assume that education, through the diploma, is not a go…

Comparison of problem solving tools in lean organizations

2017

As global market competition is getting fiercer, and companies are looking at ways to stay on top, more and more organizations are looking at Lean Manufacturing and lean tools to support them in achieving their goals. Especially within the automotive industry, lean practices are very well received. The speed at which the automotive industry is evolving, especially but not only, in countries like Romania, leads to the need to carefully analyze lean manufacturing concepts, examine them against local production conditions, and to develop and standardize them. One of the most important things to take into consideration here is the application of an adequate problem solving technique to avoid wa…

Education, intériorisation de la méritocratie et perception des frontières entre groupes sociaux

2006

La présente recherche (qui s'achèvera en 2007-2008) envisage une manière de tester empiriquement la thèse de la reproduction de Bourdieu et Passeron en explorant la perception de la légitimité des inégalités scolaires et de leurs incidences sociales, chez des individus inégalement formés. Elle entend ainsi explorer les relations entre trajectoire scolaire (niveau atteint, mais aussi filière de formation suivie) et intériorisation de la méritocratie et plus largement le jugement sur les inégalités existantes.

Education, intériorisation de la méritocratie et perception des frontières entre groupes sociaux

2007

Boudon contre Bourdieu : d'où viennent les inégalités scolaires ?

2023

C’est une des polémiques, les plus célèbres de la sociologie française. Pierre Bourdieu et Jean-Claude Passeron expliquent les inégalités sociales à l’école par l’héritage culturel, quand Raymond Boudon considère qu’elles résultent de choix individuels dans une société inégale. Que valent ces explications un demi-siècle plus tard ?

Controverses autour du livre de Pierre Bourdieu "La domination masculine"

1999

International audience