Search results for "merit"
showing 10 items of 135 documents
Photo-thermal modulation of surface plasmon polariton propagation at telecommunication wavelengths
2013
International audience; We report on photo-thermal modulation of thin film surface plasmon polaritons (SPP) excited at telecom wavelengths and traveling at a gold/air interface. By operating a modulated continuous-wave or a Q-switched nanosecond pump laser, we investigate the photo-thermally induced modulation of SPP propagation mediated by the temperature-dependent ohmic losses in the gold film. We use a fiber-to-fiber characterization set-up to measure accurately the modulation depth of the SPP signal under photo-thermal excitation. On the basis of these measurements, we extract the thermo-plasmonic coefficient of the SPP mode defined as the temperature derivative of the SPP damping const…
Incertitudes et effets pervers de l'inflation scolaire
2006
06044http://ep.inrp.fr/EP/colloques/colloque_repenser_justice/communication_marie_duru_bellat/view; La méritocratie s'impose comme la seule voie à la fois juste et efficace de répartir les places (inégales) dans les sociétés démocratiques. Dès lors que la méritocratie fait l'objet d'une forte valorisation, et qu'on place toute confiance en l'école pour la faire advenir, tout développement de l'éducation ne peut aller que dans le sens du progrès : C'est un vecteur de réduction des inégalités sociales et d'accroissement de la mobilité sociale, les effets économiques et sociaux plus généraux en sont forcément positifs. Est-ce si sûr ? Sans balayer ici toutes ces questions, on pointera quelques…
La méritocratie scolaire, une idéologie partagée ?
2006
06049; Au sein du domaine assez nourri des travaux sur les sentiments de justice (Kellerhals et al, 1997 ; Dubet, 2005), la recherche présentée ici se centre sur l'intériorisation du principe de mérite et sur la légitimité de l'assimilation entre mérite et mérite scolaire. Il s'agit de tester l'hypothèse émise dans le cadre des théories de la reproduction selon laquelle l'école joue en ce domaine, avec entre autres conséquences que l'intériorisation de la méritocratie scolaire doit être sensible au niveau d'instruction. Dans ce volet qualitatif, on se fonde sur l'analyse de cent entretiens auprès d'adultes tout-venant. L'intériorisation de la méritocratie scolaire est appréhendée par des qu…
Equivalence of Open-Loop and Closed-Loop Operation of SAW Resonators and Delay Lines
2019
International audience; Surface acoustic wave (SAW) sensors in the form of two-port resonators or delay lines are widely used in various fields of application. The readout of such sensors is achieved by electronic systems operating either in an open-loop or in a closed-loop configuration. The mode of operation of the sensor system is usually chosen based on requirements like, e.g., bandwidth, dynamic range, linearity, costs, and immunity against environmental influences. Because the limit of detection (LOD) at the output of a sensor system is often one of the most important figures of merit, both readout structures, i.e., open-loop and closed-loop systems, are analyzed in terms of the minim…
Huomioita ansaitsemisen ideologiasta
2015
Taimenen mädin säilyvyys ja alkioiden kasvu Savijoen kipsinlevitysalueella
2019
Pelloille tehtävän kipsinlevityksen vesistövaikutuksia tutkittiin Helsingin yliopiston ja Suomen ympäristökeskuksen yhteishankkeessa ”SAVE - Saaristomeren vedenlaadun parantaminen peltojen kipsikäsittelyllä”. Hanke oli ympäristöministeriön rahoittama hallituksen kärkihanke. Siinä missä kipsin, eli kalsiumsulfaatin, levitys on vähentänyt pelloilta tulevaa fosforikuormitusta, se on toisaalta nostanut pilottialuetta halkovan Savijoen sulfaattipitoisuuden kolminkertaiseksi. Suuren sulfaattipitoisuuden tiedetään olevan haitallista vesieliöille, kuten kaloille. Näin ollen Jyväskylän yliopisto selvitti kipsinlevityksen vaikutuksia taimenen (Salmo trutta) varhaisten elinvaiheiden säilyvyyteen ja ka…
IL SOVRAINDEBITAMENTO DEL CONSUMATORE IN PROSPETTIVA RIMEDIALE: NOTE A MARGINE DI CASS. 1 FEBBRAIO 2016, N. 1869
2017
La perimetrazione della nozione di consumatore nella prospettiva rimediale del sovraindebitamento
Toward device applicable second order NLO polymer materials: definition of the chromophore figure of merit
2007
Maximal achieved second order non linear optical (NLO) efficiency of the PMMA based host – guest systems containing eight dimethylaminobenzylidene -1, 3 - indandione (DMABI) related chromophores have been analysed. Two contradicting sets of NLO chromophore figure of merit (FOM) equations were tested. One of them predicts that NLO efficiency of the poled polymer host -guest film is proportional to ground state dipole d33 ~ 1/μg, another to d33 ~ 1/μg. The best correlations for the maximal achieved nonlinearity were obtained with second set of FOM, especially if high ground state dipole (μg > 7D) chromofores are included in analysis.
New Figure of Merit for Tailoring Optimal Structure of the Second Order NLO Chromophore for Guest-Host Polymers
2008
Reliability to forecast SHG efficiency using two sets of non linear optical (NLO) chromophore figures of merit (FOM) was tested. One of them predicts that SHG efficiency d 33 of the poled guest-host polymer is proportional to ground state dipole ∼ μg, another to ∼ 1/μg. Correlation of maximal achieved second order NLO efficiency of the PMMA based systems containing eight dimethylaminobenzylidene-1, 3-indandione (DMABI) related chromophores with proposed FOM have been analyzed. The best correlations were obtained with second set of FOM, especially if high dipole moment (μg > 7D) chromophores are included in analysis.