Search results for "general [BL Lacertae objects]"
showing 10 items of 27644 documents
Yrittäjyyskasvatuksen pedagogisia lähtökohtia pohtimassa
2001
Yrittäjyystutkimuksessa biologinen perimä, yrittäjäksi syntyminen, on siirtynyt taustalle. Painopistettä on suunnattu kasvatukselliseen pohdintaan. Se on tuottanut tutkimusta pääasiassa yrittäjyyden tieteenalalla. Pääpaino on ollut toisaalta aikuisväestön, jo ammatissa toimivien tai työttömien kouluttamisessa yrittäjiksi, toisaalta yrittäjyyden kytkemisessä ammatillisen ja korkean asteen koulutukseen. Yrittäjyyden pedagogisten perusteiden pohdinta on sen sijaan vasta lähtemässä liikkeelle.
Cadmium Metal–Organic Frameworks Based on Ditopic Triazamacrocyclic Linkers: Unusual Structural Features and Selective CO 2 Capture
2017
International audience; Two three-dimensional cadmium metal organic frameworks with general formula [Cd-2(L-1)(H2O)(3)](NO3)(0.7)(HCOO)(0.2)Br-0.1 (Cd2L1, L-1 = 1,4,7-tris(4-carboxybenzy1)-1,4,7-triazacyclononane) and Cd(HL2)(H2O)(2) (CdL2, L-2 = 1,4,7-tris(3-(4-benzoate)prop-2-yn-1-yl)-1,4,7-triazacydononane) based on 1,4,7-triazacyclononane N-functionalized by different arylcarboxylic acids were prepared under solvothermal conditions and characterized by single crystal X-ray analysis and porosity measurements. The crystal structure of Cd2L1 reveals a cationic net with a bcs topology,. and nodes are constituted by dinuclear cadmium complexes, in which each cadmium atom adopts a hexacoordin…
Biodegradable Metal-Organic Framework-Based Microrobots (MOFBOTs).
2020
Microrobots and metal–organic frameworks (MOFs) have been identified as promising carriers for drug delivery applications. While clinical applications of microrobots are limited by their low drug loading efficiencies and the poor degradability of the materials used for their fabrication, MOFs lack motility and targeted drug delivery capabilities. The combination of these two fields marks the beginning of a new era; MOF‐based small‐scale robots (MOFBOTs) for biomedical applications. Yet, biodegradability is a major hurdle in the field of micro‐ and nanoswimmers including small‐scale robots. Here, a highly integrated MOFBOT that is able to realize magnetic locomotion, drug delivery, and selec…
Phosphorus limitation enhances parasite impact: feedback effects at the population level
2014
Background Nutrient deficiency affects the growth and population dynamics of consumers. Endoparasites can be seen as consumers that drain carbon (C) or energy from their host while simultaneously competing for limiting resources such as phosphorus (P). Depending on the relative demands of the host and the parasite for the limiting nutrient, intensified resource competition under nutrient limitation can either reduce the parasite’s effect on the host or further reduce the fitness of the nutrient-limited host. So far, knowledge of how nutrient limitation affects parasite performance at the host population level and how this affects the host populations is limited. Results We followed the popu…
La formation du capital humain : gestion par le marché ou gestion par l'État
1992
Human capital formation : state or market management This paper examines the likely difficulties of the management by the state of the education sector. Concerning the operation of the system, the analysis is based on international comparisons and on the French experience. As a whole the difficulties are linked to the weak accountability and justification in the use of the resources mobilized. This arises from the absence of the regulatory mechanisms as those existing in a market oriented activity. Economist's approach and tools (cost-effectiveness, production theory, ...) can be used as a substitute to such mechanisms. In a same line of argument, the article adresses the issue of external …
Pour une politique de la qualité de l'école primaire en Afrique : évaluation des acquis des élèves en CP et en CM au Togo
1993
Policy decisions in education cannot be made upon opinions and subjectives factors ; this is especially true in African countries where demographic and economic constraints are particularly binding. A key element is to measure the impact of the various factors affecting student learning, even though this step has to be complemented by cost estimates so as to produce cost-efficiency indicators. This papers concerns primary schooling in Togo and aims at documenting the link between school factors on the one hand, pupil achievement on the other. The results have very clear consequences in terms of educational policy since they show that inputs such as school building in concrete or recruitemen…
Les limites de la théorie du salaire d'efficience
1998
Efficiency wage theory, evolved by the "new keynesians", is part of a research programme concerned with explaining "involuntary" unemployment as part of the "general equilibrium". So, these works are a synthesis attempt of neo-classical and keynesian analyses in the employment area. Indeed, the authors place their analysis in a walrasian framework, but they integrate a keynesian concept to complete their models. In order to achieve their purpose, the efficiency wage theorists formulate two propositions on which their argument is based: 1° the relation supposed rising between the rate of wage and the productivity of wage earners, 2° the determination of the rate of wage outside the market. W…
Ruwen Ogien au secours des éducateurs scolaires : une pensée pour réduire quelques apories éducatives
2021
Les projets éducatifs sont, par nature, des visions enchevêtrées de moyens et d’objectifs qui tentent de faire face à des apories éducatives. Ce texte propose d’envisager les apports de la pensée de Ruwen Ogien pour cela. On y examine ainsi successivement les possibilités offertes pour la sanction éducative, l’orientation et la prise en charge de la difficulté scolaire au moyen des notions de « faiblesse de la volonté », de non-nuisance et de l’idée de supériorité des droits sur les valeurs. En fin de compte sont apportés quelques arguments montrant que le minimalisme moral défendu par Ogien peut permettre à la fois de penser de façon plus assurée certaines apories éducatives, tout en augme…
Interprétation littéraire et sciences cognitives (ed. Françoise Lavocat, 2016)
2022
Review of the collective volume Interprétation littéraire et sciences cognitives (ed. François Lavocat, Hermann, 2016).
Photoluminescence properties of S2 molecule trapped in Melanophlogite
2015
We studied the photoluminescence properties of a sample of SiO2-clathrate Melanophlogite, a crystalline microporous material which is found in nature as a rare mineral. Upon β irradiation, the material displays an intense light emission under near-UV illumination. We studied in detail this optical activity by steady-state and time-resolved photoluminescence measurements as a function of temperature. The spectroscopic properties we find can be ascribed to a population of quasi-free molecules trapped within each of the two different types of cage available in the structure of this clathrate, although the spectroscopic properties of the guest molecules are affected by their interactions with t…