Search results for "LAB"
showing 10 items of 7932 documents
Per-flow signalling extension across DiffServ domains
2003
This paper describes a framework devised to extend per-flow admission control operation across Differentiated Services domains. Although the specific case of interoperability with RSVP is under discussion, our proposal can be easily adapted to other hop-by-hop signalling protocols. In our framework, DiffSery border routers accomplish three tasks. First, during the set-up phase, flows are mapped onto PHB groups on the basis of their QoS and traffic specifications. Second, signalling packets are tunnelled into IP packets marked as “probes”, where the “probe” marking is a DCSP value associated to the considered PHB Group. Third, when the flow set-up is complete, flow data packets are marked as…
Aperiodic Diffract: Study of diffraction gratings
2014
In this work we introduce a virtual laboratory, APERIODIC DIFFRACT, developed in Matlab GUI (Graphical User Interface) as an informatics tool for teaching the diffractive properties of aperiodic gratings. This GUI allows the student to generate aperiodic sequences by iterating and lets to study the spectra for different iterating orders.<br /><br />
Undergraduate experiment with fractal diffraction gratings
2011
We present a simple diffraction experiment with fractal gratings based on the triadic Cantor set. Diffraction by fractals is proposed as a motivating strategy for students of optics in the potential applications of optical processing. Fraunhofer diffraction patterns are obtained using standard equipment present in most undergraduate physics laboratories and compared with those obtained with conventional periodic gratings. It is shown that fractal gratings produce self-similar diffraction patterns which can be evaluated analytically. Good agreement is obtained between experimental and numerical results. © 2011 IOP Publishing Ltd.
Efficiency of a digital particle image velocimetry (DPIV) method for monitoring the surface velocity of hyper-concentrated flows
2018
Digital particle image velocimetry records high resolution images and allows the identification of the position of points in different time instants. This paper explores the efficiency of the digital image-technique for remote monitoring of surface velocity and discharge measurement in hyper-concentrated flow by the way of laboratory experiment. One of the challenges in the application of the image-technique is the evaluation of the error in estimating surface velocity. The error quantification is complex because it depends on many factors characterizing either the experimental conditions or/and the processing algorithm. In the present work, attention is devoted to the estimation error due …
A new ecdysteroid and other constituents from two Dioscorea species
2008
Phytochemical investigation of the rhizome of Dioscorea dumetorum has led to the isolation by several chromatographic steps on normal and reversed phase silica gel of a new ecdysteroid, (20R)-5β,11α,20-trihydroxyecdysone (1), and two known ecdysteroids, ajugasterone C (2) and herkesterone (3). Their structures were determined by spectroscopic methods including 1D- and 2D-NMR (COSY, TOCSY, HSQC and HMBC). This is the first report on the occurrence of phytoecdysteroids in the Dioscoreaceae family. These compounds were devoid of antifungal activity against three Candida species (Candida albicans, Candida glabrata and Candida tropicalis, MIC > 200 μg/ml).
Des caractéristiques des équipes de recherche aux pratiques de recrutement en entreprise
1999
International audience
Graduate employment and the returns to higher education in Africa
2013
http://cemapre.iseg.utl.pt/educonf/2e3/files/submissions_to_web/Barounia%20Mahdi_Broeckeb%20%20Stijn.docx; In this paper, we estimate the return to higher education for 12 African countries using recent data and a variety of methods. Importantly, one of our methods adjusts for the effect of higher education on the rate of joblessness, which is substantial in most African countries, and particularly for women. Our results confirm that Mincerian coefficients cannot be interpreted as a true rate of return, and that the latter (even after taking into account the employment effect) is considerably lower than what has previously been suggested in the literature (less than half). For Sub-Saharan A…
Les jeunes issus de l'immigration. De l'enseignement supérieur au marché du travail
2004
04038http://www.cereq.fr/pdf/b205.pdf; Souvent d'origine sociale défavorisée, les jeunes issus de l'immigration sont proportionnellement moins nombreux que les autres à poursuivre leurs études après le baccalauréat. Même lorsque tel est le cas, leur passage par l'enseignement supérieur ne parvient pas toujours à gommer le poids de leur origine, en particulier lorsqu'ils sont issus de l'immigration nord-africaine. Plus souvent confrontés au chômage, à la précarité de l'emploi, les jeunes d'origine maghrébine, et notamment les jeunes femmes, ont en effet plus de difficultés à entrer dans la vie active. Pour accéder à leur premier emploi, ils ont fréquemment recours à l'intérim, au travail sai…
Employment of higher education graduates in Russia
2006
Given the influence of two trends (a transitional character and the influence of a knowledge-based economy), it is of interest to study what demands places the current labour market on higher education graduates. The main objective of our study is, therefore, to shed light on the two key questions:In the context of transitional economy influenced by the global move towards a knowledge-based society what demands face graduates while entering and operating on the labour market and what competencies are they required to possess? To what extent does Russian higher education prepare young people to face these demands?We will first describe global trends on graduate labour markets in Europe, aimi…
The Graduates in the Knowledge and Innovation Society
2011
According to the crucial importance of innovation for modern economies, the role of graduates regarding innovation appears to be a major topic when their performances in the labour market at stake. Five main questions are addressed in this chapter: (1) What does innovation mean? (2) Which organisations are likely to be more innovative? (3) What role do Higher Education graduates play regarding innovation? (4) Are they equipped to do develop innovation? (5) Which are the occupations more related to innovation, and are innovative activities rewarded? The results presented in this chapter confirm that higher education graduates are crucial actors in the innovation process. The jobs of innovati…