Search results for "MAI"
showing 10 items of 6279 documents
Numerical Algorithms Based on Characteristic Domain Decomposition for Obstacle Problems
1997
A new numerical solution algorithm for obstacle problems is proposed, where the characteristic domain decomposition into active and inactive subdomains separated by the free boundary is approximated by a Schwarz method. Such an approach gives an opportunity to apply fast linear system solvers to genuinely non-linear obstacle problems. Other solution algorithms, like projected relaxation methods and active set strategies, are compared to the new solution algorithm. Numerical experiments related to the elastoplastic torsion problem are included showing the efficiency of the new approach.
Comment repérer des compétences clés ?
2010
10004; Calcul, mémoire, attention : quelles compétences développer plus particulièrement en cycle 2, à partir du constat que toutes n'ont pas le même impact quand on observe précisément la suite des parcours scolaires ?
The Calderón problem for the fractional Schrödinger equation
2020
We show global uniqueness in an inverse problem for the fractional Schr\"odinger equation: an unknown potential in a bounded domain is uniquely determined by exterior measurements of solutions. We also show global uniqueness in the partial data problem where the measurements are taken in arbitrary open, possibly disjoint, subsets of the exterior. The results apply in any dimension $\geq 2$ and are based on a strong approximation property of the fractional equation that extends earlier work. This special feature of the nonlocal equation renders the analysis of related inverse problems radically different from the traditional Calder\'on problem.
Dificultades de aprendizaje y cambio conceptual, procedimental y axiológico (II): nuevas perspectivas
2009
En este trabajo veremos como las ciencias cognitivas, las neurociencias, los estudios CTS, la educacion cientifica no formal, etc., ofrecen nuevas posibilidades de avance en el campo del aprendizaje de conceptos, procedimientos y actitudes, y tambien veremos otras perspectivas que amplian el dominio usual de la didactica de las ciencias. Por ultimo, se muestra como los modelos de ensenanza deben tener en cuenta estas dimensiones del aprendizaje de las ciencias, para contribuir a la solucion de los nuevos problemas que se plantean sobre la educacion cientifica.Palabras clave: ciencias cognitivas; neurociencias; estudios CTSA; ensenanza, aprendizaje.Learning difficulties and conceptual, metho…
Medical Data Mining for Heart Diseases and the Future of Sequential Mining in Medical Field
2018
Data Mining in general is the act of extracting interesting patterns and discovering non-trivial knowledge from a large amount of data. Medical data mining can be used to understand the events happened in the past, i.e. studying a patients vital signs to understand his complications and discover why he has died, or to predict the future by analyzing the events that had happened. In this chapter we are presenting an overview on studies that use data mining to predict heart failure and heart diseases classes. We will also focus on one of the trendiest data-mining field, namely the Sequential Mining, which is a very promising paradigm. Due to its important results in many fields, this chapter …
Computational approach to design of aptamers to the receptor binding domain of SARS-CoV-2
2021
The aim of the research. In this work, in silico selection of DNA-aptamers to the receptor-binding domain (RBD) of the SARS-CoV-2 spike protein was performed using molecular modeling methods. Material and methods. A new computational approach to aptamer in silico selection is based on a cycle of simulations, including the stages of molecular modeling, molecular docking, molecular dynamic simulations, and quantum chemical calculations. To verify the obtained calculated results flow cytometry, fluorescence polarization, and small-angle X-ray scattering methods were applied. Results. An initial library consisted of 256 16-mer oligonucleotides was modeled. Based on molecular docking results, th…
Multilingvālisma tipi studentu diskursā
2016
Šajā bakalaura darbā tiek pētīti multilingvālisma tipi studentu diskursā. Multilingvālisms ir spēja komunicēt divās vai vairākās valodās. Šī bakalaura darba mērķis ir noskaidrot, kādi ir multilingvālisma un koda maiņas tipi, kā arī, vai malajiešu studenti izmanto koda maiņu savā diskursā. Papildus tiek noskaidrots, kuru valodu vārdus malajiešu studenti izmanto savā diskursā. Pētījumā tiek izmantotas divas metodes: diskursa analīze un cilvēku aptaujāšana. Šo metožu izmantošana palīdz iegūt ziņas par viņu saskarsmi ar vairākām valodām, kā arī analizēt iegūtos rezultātus un salīdzināt tos ar citu autoru iegūtajiem rezultātiem. Kvantitatīvā pētījuma rezultāti liecina, ka visi aptaujātie ir angļ…
Gold based plasmonic stripes co-integrated with low loss Si3N4 platform in aqueous environment
2018
We demonstrate a butt-coupled interface between LPCVD Si 3 N 4 and gold based plasmonic waveguides in aqueous environment, exhibiting 2.3dB coupling loss and 75μm propagation length at 1550nm, towards future employment in biosensing applications.
Identification des compétences à l'école élémentaire :une approche empirique à partir des évaluations institutionnelles
2007
Cet article propose une analyse des résultats des élèves aux évaluations nationales, l’objectif étant de mieux comprendre comment les acquisitions se structurent à l’école primaire. L’intérêt de cette démarche réside principalement dans l’identification de compétences dont la maîtrise est essentielle à la réussite scolaire. L’approche choisie pour traiter la question est résolument empirique et se base sur l’examen des relations statistiques entre les items. Elle permet de répondre à plusieurs questions susceptibles d’intéresser les chercheurs en éducation, mais aussi les acteurs engagés, à différents degrés, dans le pilotage et la gestion pédagogique de l’enseignement primaire. Les évaluat…
Julma ja kiehtova itä : muslimit englanninkielisissä maantieteen teoksissa 1700-luvun jälkimmäisellä puoliskolla
2010
Eurooppa ja islam ovat olleet toistensa kanssa tekemisissä jo vuosisatojen ajan. Kanssakäyminen on ollut sekä vihamielistä, että rauhanomaista, mutta eurooppalaisten asenteita on aina värittänyt pelko kristinuskon vanhentuneena kieltänyttä itäistä naapuria kohtaan. Tässä työssä tarkastellaan Euroopassa 1700-luvun loppupuolella vallinnutta muslimikuvaa. Tutkimuksessa selvitetään, miten muslimeihin suhtauduttiin maallistuvassa yhteiskunnassa, millaisia representaatioita heistä rakennettiin, sekä eroteltiinko muslimikansallisuudet toisistaan, vai tarkasteltiinko heitä yhtenäisenä ryhmänä. Alkuperäislähteenä käytetään 1700-luvun jälkimmäisellä puoliskolla kirjoitettuja englanninkielisiä maantie…