Search results for " research"
showing 10 items of 14115 documents
Des capacités de choix aux probabilités de choix (un théorème de conversion)
1992
Une partie importante de la théorie des choix discrets concerne les développements du modèle de Luce 1959]. Cette place privilégiée provient sans nul doute de l’extrême élégance de PAxiome du Choix qui permet d’une part, d’introduire une sorte de rationalité imparfaite du comportement en autorisant la construction de probabilités de choix et d’autre part, de décrire un processus de choix qui semble raisonnablement réaliste : en effet, il est suggéré que l’agent faisant face à un ensemble fini d’actions, choisit dans un premier temps un sous-ensemble, puis finalement, à l ’intérieur de ce sous-ensemble, une action. Il existe de nombreuses versions de ce modèle ( Yellot [1977], Strauss [1980]…
La combinaison de prévisions multiples en présence d'objectifs multiples
1989
L'idée de combiner plusieurs prédicteurs pour générer des prévisions combinées plus fiables semble ne dater que de 1969, date de la publication de l'article de Bâtes et Granger (1969). Depuis lors on a constaté un foisonnement de publications tant théoriques qu'empiriques dans ce domaine et l'utilité pratique de la combinaison de prévisions individuelles y a été amplement démontrée.
Efficient regio- and stereoselective access to novel fluorinated ?-aminocyclohexanecarboxylates
2013
A regio- and stereoselective method has been developed for the synthesis of novel fluorinated 2-aminocyclohexanecarboxylic acid derivatives with the fluorine attached to position 4 of the ring. The synthesis starts from either cis- or trans-β-aminocyclohex-4-enecarboxylic acids and involves regio- and stereoselective transformation of the ring C–C double bond through iodooxazine formation and hydroxylation, followed by hydroxy–fluorine or oxo–fluorine exchange.
Brand social representations: strategic perspectives for a fitness club
2009
International audience; The aim of this study was to identify an accurate tool to enable fitness club managers to discover those opinions or stereotypes which represent obstacles to joining their organisations. Starting with brand image, the analysis then considered social representations as relevant constructs for apprehending these opinions or prejudices. The use of a word association task and the model of basic cognitive schemes (Rouquette, 1990; 1994) provided access to the salient elements of the social representations of a particular sport brand and the way they are structured. The procedure combining these two stages represented a diagnostic tool for identifying the attractive and un…
Representations of nationality in Carl Barks' Lost in the Andes and Voodoo hoodoo
2013
Tutkielman tarkoituksena oli selvittää, miten kansallisuus ja ei-amerikkalaiset hahmot on esitetty Carl Barksin ankkatarinoissa Lost in the Andes ja Voodoo Hoodoo. Tutkielman perustana toimivat Scott McCloudin ja Juha Herkmanin sarjakuvia käsittelevät teokset sekä kansallisten stereotypioiden tutkimus. Sarjakuvat analysoitiin hyödyntäen McCloudin ja Herkmanin määritelmiä sarjakuvien eri elementeistä. Tutkimuksessa kävi ilmi, että paikalliset, ei-yhdysvaltalaiset hahmot on kuvattu yksipuolisesti, miesvaltaisesti ja muutamaa piirrettä korostaen kunkin kansallisuuden kohdalla. Esilletulleita seikkoja olivat muunmuassa hahmojen vaatetus, kasvonpiirteet, luonne sekä käyttäytyminen. Nämä piirteet…
The implications of teachers’ implicit theories for moral education: A case study from Finland
2017
Implicit theories concerning the malleability of human qualities are known to have a powerful impact on motivation and learning, but their role in moral education is an under-researched topic. In this qualitative case study, we examined the impact of implicit theories on four Finnish teachers’ practices of teaching morally and in teaching morality. The data include preliminary and stimulated recall interviews (STR) as well as classroom observations. Our results demonstrate the multiple ways in which teachers’ implicit beliefs are communicated to students and influence teacher’s interpretations and endeavors to educate the ethical capabilities of students. The study provides evidence for the…
Using uncertain preferential information from stakeholders to assess the acceptability of alternative forest management plans
2017
In forest management planning, participatory planning processes are often encouraged as a means to acquire relevant information and to enhance the stakeholders' acceptability of alternative plans. This requires the aggregation of the stakeholders' preferences that can be done in a wide variety of manners. The aggregation process strives to reduce the information into a single set of preferences that simplifies the information and allows for the use of discrete decision support tools. Depending on how the preferences are aggregated, a wide range of plan rankings can emerge. Although this range of ranking complicates the issue of plan selection, it does highlight the uncertainty involved in a…
The matrix metalloproteinase and insulin-like growth factor system in oral cancer : a prospective clinical study
2017
Aim The absence of reliable single serum biomarkers for oral premalignant lesion (OPL) and oral squamous cell carcinoma (OSCC) limits early diagnosis, monitoring of advanced disease, and prediction of prognosis. Methods In this prospective study, serum levels of matrix metalloproteinase (MMP)-2, MMP-3, MMP-13, insulin-like growth factor (IGF)-1, and IGF-binding protein (IGFBP)-3 were measured in 81 untreated OSCC patients, 49 healthy subjects, and 75 individuals with OPLs, and correlated with clinicopathological parameters. Results Serum levels of MMP-3 were significantly higher in OSCC patients compared to healthy subjects (p=0.004). Mean IGF-1 and IGFBP-3 levels in OSCC patients were sign…
Inflammatory response elements, glycan, and proteome profiles as salivary biomarkers for the early diagnosis of OSCC
2021
El cáncer oral, sobre todo el, carcinoma oral de células escamosas (COCE), es la neoplasia maligna más común en la cavidad oral que se caracteriza por un mal pronóstico y una baja tasa de supervivencia, cuando se diagnostica en estadios avanzados. Puede ser tratado de forma efectiva si se detecta en estadios iniciales, mejorando el pronóstico. Por tanto, tras la prevención, el diagnóstico precoz se ha convertido en el principal objetivo en el manejo del cáncer oral, dado su impacto positivo en la supervivencia y calidad de vida de estos pacientes. A menudo, los escasos síntomas iniciales pasan desapercibidos y la enfermedad se descubre en fases avanzadas, por lo que se requiere mejorar el d…