Search results for "Function"

Human capital and RD Driven Growth: analyse for France at regional level on the long run

2012

At the root of the Lisbon goal, for Europe, is placed the awareness for advocating a close link between growth and dissemination of advanced knowledge and innovation, on the one hand, and raising in general endowments in human capital, on the other hand, as to have power over the development of non-specific skills and boost efficiency. Much work in literature also stressed the interest of the position concerning traditional activities in the geography of innovation and links, in the long term, between the spatial distribution of longestablished skills and knowledge creation. Following Jones, in this approach, for which contribution to R&D and innovation explains half of the increase in weal…

On students' understanding of Riemann sums of integrals of functions of two variables

2018

International audience; APOS (Action-Process-Object-Schema) Theory is used to pose and test a conjecture of mental constructions that may be used to understand the relation between integrals of two variable functions over rectangles and corresponding Riemann sums. Interviews with ten students who had just finished a multivariable calculus course showed that the conjectured mental constructions are necessary.

"Radio, guinguettes, chansons et jazz dans le roman aragonien"

2020

Tackling the question of the presence of song in Aragon’s novels may seem paradoxical or unimportant, if one were to limit their analysis to the numerous poems by Aragon to be put into music by contemporary singers – or today’s composers. Musical adaptations of his texts deal with an era of his production which begins in the 1930s, when Aragon advocates for song, particularly with the creation of the Maison de la Culture – and also a moment when he becomes a novelist. The analysis of some textual phenomena, in parallel with the references to songs in his novels, should allow us to grasp the kind of poetic realism at work in Aragon’s productions.

The development of analogical reasoning : role of the executive component of inhibition

2011

We explored the development of the analogical reasoning. The traditional conception of this development is that it is dependent of knowledge accretion in children (Gentner, 1983, 1988; Goswami & Brown, 1989, 1990). We used a different approach which explains it as dependent of the development of the executive functions, particularly of the component of inhibition. The capacity of inhibition allows the suppression of the salient but irrelevant information for analogy-making in children. It is required while searching for the analogical solution. Nine studies involving a classical analogy-making task A : B :: C : ? were performed in this dissertation. The role of the capacity of inhibition wa…

Analogical reasoning and its development : role of executive functions and the goal of the task

2013

This manuscript develops an issue related to the involvement of goal management capabilities and executive functions in this type of reasoning and its development. The first three experiments examine this issue in two tasks of analogical reasoning, the scene analogy task and the A:B::C:? task, through the study of visual strategies used by adults, and children aged 6-to-7. The results show differences in visual patterns related to goals, and to the inhibition of irrelevant information for the solution of the problems, between the different tasks, and between children and adults. The following two experiments study the visual strategies, always in relation to executive functioning and goal m…

Theoretical use of boron nitride nanotubes as a perfect container for anticancer molecules

2016

International audience; In recent years great interest has emerged in the development of nanocarriers for drug transport. One of themajor challenges is to obtain a drug delivery system able to control the drug release profile, transportabsorption and distribution, in the view of improving efficacy and safety. Herein, we present theoreticalresults based on density functional theory (DFT) to determine the best adsorption site for the anticancerifosfamide molecule in boron nitride nanotubes. For this functionalized system we determine thedependence of the adsorption energy on the displacement of molecules in the outer and inner boronnitride surfaces, together with their local morphological and…

Entangled photons through thick scattering media: experiments and comparison with simulations of the biphoton wave function

2021

International audience; We report experimentally and numerically quantum correlations imaging through thick random media. We demonstrated that spatial correlations between twin photon are still detected but no in form of two-photon speckle-like patterns.

Gas sensors arrays (electronic noses) : a study about the speed/accuracy ratio

2000

Abstract New Fingerprint Mass Spectra (FMS) systems claim for a higher precision, a reduced analysis time, and a lower drift, compared with Gas Sensors Arrays ‘Electronic Noses’. We demonstrated in this study that metal oxide gas sensors may have highly improved performances for both accuracy and run time, when used in optimum conditions. The different noise components were quantified referring to popular words (equivalent of ethanol concentration) using the transfer function of the sensor. It was pointed out that sample surrounding greatly affects the noise level, and that the signal-to-noise ratio may be dramatically increased, reducing the distortion generally assessed between sensor and…

Analysis of errors caused by incomplete knowledge of material data in mathematical models of elastic media

2011

Excitons in few-layer hexagonal boron nitride: Davydov splitting and surface localization

2018

Hexagonal boron nitride (hBN) has been attracting great attention because of its strong excitonic effects. Taking into account few-layer systems, we investigate theoretically the effects of the number of layers on quasiparticle energies, absorption spectra, and excitonic states, placing particular focus on the Davydov splitting of the lowest bound excitons. We describe how the inter-layer interaction as well as the variation in electronic screening as a function of layer number $N$ affects the electronic and optical properties. Using both \textit{ab initio} simulations and a tight-binding model for an effective Hamiltonian describing the excitons, we characterize in detail the symmetry of t…