NCube/papyrus huggingface dataset:
Émanation et métaphysique de la lumière dans Vérité et méthode de Gadamer

My thesis shows the presence and role of metaphysics in Truth and Method. It attempts to show that Gadamer builds upon Neoplatonism to overcome the subjectivism of modernity and offers a metaphysics in this regard. It explains how Gadamer reclaims the legacy of Greek thought to criticize modernity, placing his interpretation of Plato compared to that of Heidegger, I argue that Gadamer appropriates Plotinus’ concept of being in such a way that it may lean to think of self-presentation of being in the hermeneutic experience of truth. In that sense, art is going to be a source of truth under the leadership of Neoplatonism. Gadamer gives an ontological dignity to art through the concept of emanation, a concept which suggests that there is a real presence of the represented in its representation, the latter derived from the represented without weakening it, providing it instead with more being. The concept of emanation then gives Gadamer an opportunity to affirm the indissoluble bond that unites words and things. Thomas Aquinas’ doctrine of the inner word indeed implies the link that Plato had covered up by making language, like logic, a mere domination instrument of the real. The use of the Neoplatonic concept of emanation makes it possible to overcome the logos of Greek philosophy and to better account for the being of language. I then show how Gadamer radicalized his thinking as he says that the being that can be understood is language, which means that being, as in Plotinus, is self-presentation. To this end, Gadamer links the being of language to Neoplatonic metaphysics of light. The last pages of Truth and Method recall indeed that the splendor of beauty is an expression for the truth of being. The concept of hermeneutic truth is then connected to its metaphysical origins. Truth is a display for the being in which we can partake only if one gets overwhelmed by its light. Far from being a matter of methodical control, the experience of truth requires to be possessed by what must be understood. In this way, I demonstrate that Gadamer found in Neoplatonism elements to challenge the dictatorship of the modern subject, which must be reversed because it hides the real relationship of man with truth by ignoring the finitude of its concrete existence. The criticism of modern subjectivism led by Neoplatonism opens the way to a metaphysics of finitude.

Keyphrases: Gadamer, Heidegger, Plotin, Hermeneutics, Metaphysics, Neoplatonism, Plotinus, Thomas Aquinas
El enfoque intercultural e interdisciplinar en la enseñanza de ELE : "La Ciudad de las Bestias" (2002) de Isabel Allende

This research aims at demonstrating the pertinence of the utilization of the novel The City of the Beasts (Isabel Allende, 2002) as a tool for teaching Spanish as a Foreign Language (ELE) at an intermediate level (B2) and in a multicultural context. Within this frame, the teaching of a second language pursues linguistic acquisition and encourages the exploration of a different culture in order to foster the discovery of the values of the other and its critical integration. This attitude shows to be indispensable for the development of the identity of the individual within societies growingly exposed from inside and outside to interaction between cultures. The selected novel allows access to interdisciplinary connections within Quebec’s College programs and promotes an attitude of openness toward the discovery of other cultures and values, requiring availability to question the student’s own cultural presuppositions, according to the tenets of contemporary intercultural studies. The novel belongs to the literary movement of Magical Realism, which helps introduce the students to the exploration of specifically Hispanic cultural themes. After a revision of the place of interculturalism and interdisciplinarity in the teaching of ELE, the dissertation analyses the specific contribution of the selected novel to these dimensions, in order to present exercises oriented toward the practice and the consolidation of grammatical and lexical knowledge, and toward the development of an intercultural sensibility in the students, providing individual and group activities built from the  perspectives that emerge from the text.

Keyphrases: Spanish as a Foreign Language, Interculturalism, Interdisciplinarity, Literature, The City of the Beasts
Amorçage cognitif pour amélioration de l’acquisition de la connaissance 
dans un système tutoriel intelligent

This thesis aims at defining a new learning method to improve knowledge acquisition for intelligent tutoring systems. Learning is a complex phenomenon interlinking both emotional and cognitive mechanisms on conscious and unconscious levels. We are interested in understanding the unconscious mechanisms involved in human reasoning for knowledge acquisition. The importance of these unconscious processes is well documented in neuroscience, but remains largely unexplored in our research field. In this thesis, we put forward a new pedagogical approach in the field of education based on a taxonomy of human perception in neuroscience. We show that this method improves on reasoning which in turn enhances overall learning and inductive capabilities for knowledge acquisition in a problem solving environment.  In a first part, we present the implementation of our new method in a tutorial system to improve reasoning hence leading to better learning. Furthermore, acknowledging the importance of emotional mechanisms in learning, we therefore recorded, in this first part, the emotional reactions of users using physiological sensors. The effectiveness of our method for learning and its positive impact on emotions has been validated on 31 participants. In a second part, we go further in our research and enhance our approach in order to improve reasoning for a better induction of knowledge. Induction in a bottom-up logical reasoning approach where one constructs general rules from observed examples. To better understand the impact of our method on the cognitive processes involved in this type of reasoning, we used sensors to record the users’ brain electrical activity. The validation of our approach was carried out on a cohort of 43 volunteers. We showed the effectiveness of our method on the induction of knowledge and sustainability of measuring user’s reasoning by brain recordings after applying proper signal processing algorithms to the data. Following the two parts, we finish the thesis by presenting the implementation of a new intelligent tutoring system incorporating the results found throughout this work.

Keyphrases: agent subliminal, cognitive priming, unconscious cognition, intelligent tutoring systems, subliminal agent, emotion, brain, biometry
Mises à distances. Ethnographie des places publiques centrales de Cluj-« Napoca » (Roumanie) dans le postsocialisme

This research focuses on the social change in the Transylvanian city of Cluj-“Napoca” in post-socialist Romania. The study explores the principles of differentiation in both social and spatial terms. Drawing on the concepts of “public space” and “place”, a multi-dimensional analysis was conducted in four areas: materiality and visibility of space, public-political sphere, public social life, individual investment and appropriation. Thus, the thesis examines the activities that take place in the central public squares, the spatial investments, the everyday rituals and the protests, the inhabitants’ multiple ethnic and religious attachments. The ethnography of the central public spaces of Cluj-“Napoca” shows a “weak classification of spaces” in the center city, which reflects a wide social diversity. The marks of ethnic identification found throughout the population and public space of Cluj-“Napoca”, refer to ethnic groups but also to a number of issues related to the process of political restructuring in post-socialism. In the same vein, ethnically based strategies are put in place in order to identify new criteria of social differentiation and redefine old social categories. Omissions, silences and aesthetic requirements convey the way that the inhabitants’ implicit claims redefine the policy framework.  In conclusion, the thesis shows how the public space in post-socialist Cluj-“Napoca” is an on-going process of social diversification and invention of Others by adopting a continuous stance of distancing. The public space is not the inquiry of what could be the “living together” (vivre ensemble), but the quest of what threat us and must be hold-off.

Keyphrases: Ethnicisation, Cluj-Napoca, Public square, Public space, Place, Ethnicity, Post-socialisme, Political sociology, Urban sociology, Cluj-Napoca, Romania
Quantitative functional neuroimaging of cerebral physiology in healthy aging

Functional MRI (fMRI) studies using the BOLD signal are done under the general assumption that the BOLD signal can be used as a direct index of neuronal activation. Studies of cognitive aging often compare BOLD signal amplitude and extent directly between younger and older groups, with the additional assumption that the relationship between neuronal activity and the hemodynamic response is unchanged across the lifespan. However, BOLD signal arises from an ambiguous mixture of changes in oxidative metabolism, blood flow and blood volume. Furthermore, previous studies have shown that several BOLD signal components may be changed during aging. More physiologically-specific information on blood flow and oxidative metabolism would allow a better understanding of these signal changes and of the physiological and cognitive changes seen with aging. The work presented here demonstrates techniques to estimate oxidative metabolism at rest and during performance of a task. These techniques are extensions of previous calibrated fMRI methods and the first method presented is based on a generalization of previous models to take into account both arbitrary changes in blood flow and blood O2 content. The improved robustness and accuracy of this method, when used with a combined hypercapnia and hyperoxia breathing manipulation, is demonstrated in visual cortex and grey matter. The second technique presented builds on the generalization of the model and uses a combination of breathing manipulations including hypercapnia, hyperoxia and both simultaneously, to obtain experimentally-determined values of resting oxygen extraction fraction and oxidative metabolism. In the second part of this thesis, age-related vascular and metabolic changes are explored in a group of younger and older adults using a calibrated fMRI framework with a hypercapnia breathing manipulation and a modified Stroop task. Changes in baseline blood flow, vascular reactivity to the CO2 challenge and calibration parameter M were identified in the older participants. Potential biases in BOLD signal measurements in older adults arising from these physiological changes are discussed. Finally, the relationship between these cerebral changes and performance on the modified Stroop task, central vascular health and cardiovascular fitness are explored. The results of this thesis support the hypothesis that greater cardiovascular fitness is associated with improvements in central vascular function, contributing in turn to improved brain vascular health and cognition.

Keyphrases: calibrated fMRI, oxidative metabolism, aging, vascular health, cerebral blood flow, cardiovascular fitness, cognition, cognition
Le studio d’enregistrement comme lieu d’expérimentation, outil créatif et vecteur d’internationalisation : Stonetree Records et la paranda garifuna en Amérique centrale

Born from a critical encounter (imposed in exile) between Garifuna people and Spanish-speaking Central American populations, Paranda is currently experiencing a resurgence of interest among stakeholders of the garifuna record production. Since its arrival in the recording studios, it has evolved into a modernized form, using electric instruments and sound treatment techniques taken from popular music. In 2000 (with the release of Paranda; Africa in Central America, produced by Ivan Duran and distributed by Warner/Elektra), Paranda became a world music, thus experiencing a substantial success in world music charts – popularity that unfolds afterwards in Garifuna communities, rediscovering a musical genre that had virtually disappeared in the village. From the example of a “recuperation”, for commercial purposes, of a traditional musical genre by an independent Central American label, this dissertation shows how a world music producer has been able to use the recording studio as a creative tool that opened the doors of internationalization. Using the studio as an experimental lab, Ivan Duran succeeded in making records that, while reaching an international critical success, would also allow him to establish his own label, Stonetree Records, as a standard within the whole regional music industry. To understand which mechanisms are activated (and how) within the spatio-temporal framework defined by the recording studio, this doctoral research will focus on the production of Laru Beya – parandero Aurelio Martinez’s latest album, produced by Ivan Duran and internationally distributed. The three central chapters are devoted to the semiotic analysis of this record, with a study of 1) creative strategies developed in the studio (through an ethnography of recording sessions, which took place on a beach in Honduras), then 2) the musical object as it was marketed (the "work" itself) and finally 3) different listeners’ (Garifuna or not) reactions. While the first chapter of this dissertation provides a contextualization of our research object (from "the studio to the village"), the fifth and final chapter – after extending the results of our case study to other phenomena – focuses on assessing the impact of Paranda’s internationalization on local music production (going back from “the studio to the village”).

Keyphrases: Garifuna, Stonetree Records, Paranda, Ethnomusicology, Studio recording, World music, Central America
Le rôle des symptômes d'hyperactivité- impulsivité dans la performance à une tâche de pointage manuel : quel rôle pour l'inattention?

Symptoms linked to ADHD were assessed on 277 twins according to the commonly recognized dimensions formed by hyperactivity-impulsivity and inattention. A semi-structured interview administered to parents was used for the assessment. Subjects were asked to perform a pointing task. Left and right hands were tested in turn, and to reach a target placed either at 135° or 45°. Order of appearance was randomly determined. All traces were categorized according to the first voluntary correction as shown in their kinematic profiles : no correction, position correction, and dynamic correction. This project proposes to characterize the link between each correction type frequency and hyperactivity-impulsivity and inattention symptoms. The population studied was mostly subclinical and did not reach ADHD diagnosis criteria. Position corrections were shown to be correlated quite reliably to hyperactivity- impulsivity symptoms, but not to inattention symptoms. Deficits were most reliably linked with left hand use. The first result was unexpected considering abundant literature confirming the link between inattention and fine motor deficits, but the second one is more in line with a less exploited hypothesis stating that hemispherical functional differentiation related to control of the hand, or control of attention is affected by ADHD.

Keyphrases: Inattention, inhibition motrice, ADHD, hyperactivity-impulsivity, motor control, planification, reaching, motor inhibition, environment
De retour de France métropolitaine : une étude des représentations (post)coloniales et des nouvelles formes d’altérité à la Martinique

The Lesser Antilles Archipelago Martinique is a society born of the transatlantic slave trade, slavery and French colonialism. This Creole society, tied to its metropolis for nearly four centuries, became a French department in 1946 giving its residents the status of French citizens. As a result, migration to the colonial center, Paris and the metropolitan region (Ile-de-France), intensified gradually to the point of institutionalization in the 1960's, thanks to the state agency BUMIDOM. The Caribbean presence in France is now such that the metropolis is refered to by immigrants as a "third island". However, in the contemporary setting there are new transatlantic mobility practices, plural and multifaceted – an integral part of which are centered around return-migration. The protagonists of return, the so-called "returnees" or "négropolitains" encounter several obstacles upon return to their homeland. This study examines the tendency to consider the returnee as a new type of "outsider" – more precisely, as a cultural foreigner; revealing another facet of otherness in Martinique and a new configuration of its postcolonial relationship with the French Republic. Following ethnographic fieldwork with these "returnees" and with the local population, a qualitative analysis of representations of the island and its inhabitants reveals how their experience in the French territory transforms the migrant and their way of belonging to Martinican and/or French culture. The representations and practices of the returnees are examined, shedding light on the emergence of new allied identities and new determinants of otherness at the intersection of these two areas, at once near and far.  Also, we will examine how the prism of return as an object of study, is transposed and reconfigured in the case of Martinique. The return acquires a special dimension for "citizens of color" who often experience social rejection and a double exclusion without stepping outside their national borders.

Keyphrases: return migration, Martinique, Representations, Postcolonialisme, Postcolonialism, Otherness, Identity
Étude numérique des origines hémodynamiques des oscillations dans des réseaux de capillaires

While simulating blood flow in a microvascular network (in the absence of biological control), it is possible to observe the presence of oscillations in certain parameters such as blood flow, nodal pressure and hematocrit (red blood cell concentration in blood). This behaviour seems consistent with certain in vivo experiments. Despite this agreement, one has to wonder if the fluctuations observed in simulations are physical in nature, numerical or an artefact of unrealistic models since there are always differences between modelling and in vivo experiments. To settle this question satisfactorily, we will study and analyze blood flow and the nature of the fluctuations in different microvascular networks using a convective model and a well-mixed model to depict the governing equations for conservation of red blood cell mass. These models take into account two important rheological effects : the Fåhraeus-Lindqvist effect describing the apparent viscosity of blood flow in a vessel and the plasma skimming effect which describes the separation of red blood cells at diverging nodes. To describe the latter effect, we will implement two plasma skimming models (Pries et al. and Fenton et al.). In this thesis, we will present a description of the physiological problem (blood rheology). We will introduce the mathematical models used (well-mixed and convective) as well as the plasma skimming models (Pries et al. and Fenton et al.) accompanied by a detailed analysis of the numerical methods implemented. For the well-mixed model, we use the traditional explicit Euler method as well as a new implicit scheme that allows us to solve the problem in an efficient manner. This is done using a Newton-Krylov method with a preconditioned conjugate gradient and GMRES method for the inner iterations as well as a quasi- Newton method (Broyden’s method). The implicit method will include the vi backward Euler and trapezoidal methods. For the convective model, the explicit method of Kiani et al. will be implemented as well as a new numerical implicit approach. The stability of these numerical schemes will be explored. Using three different topologies, we will compare the results of the two mathematical models as well as the two plasma skimming models and the various numerical methods in order to ascertain to what extent the oscillations that have been observed using the traditional schemes may be attributable to the choice of the mathematical models or the choice of the numerical methods.

Keyphrases: oscillations, Microvascular network, oscillations, blood flow, hematocrit
L’interprétation mécaniste des communautés et des écosystèmes

The concepts of ecosystem and community are central to ecological explanations. However, since the introduction of these concepts, their ontological status is controversial. Taking as a starting point the mechanistic explanatory theories in philosophy of science, I argue that ecosystems and communities are mechanisms. More precisely, I suggest that they are entities and activities organized in such a way as to exhibit regular and precise phenomenons (Machamer, Darden, Craver 2000). While entities are the components of the mechanisms (ex: species, ecological niche), activities are the causal relations that produce changes (ex: photosynthesis, predation). Finally, the interaction of the entities and the activities produce emerging properties that are unique to the community and ecosystem level (ex: pH, biomass). By using the manipulationniste theory of Woodward (2003) and the experimental results of Swenson and Wilson (2000), I argue that it is possible to identify the causal components of the ecosystems and communities and their relations to one another. Since it is possible to manipulate empirically and counterfactually ecosystems and communities, I conclude that they are real entities.

Keyphrases: Manipulation, Ecology, Biology, Community, Ecosystem, Ontology, Manipulation, Mechanism, Explanation, Robustness, Philosophy
Modélisation toxicocinétique d’un mélange de composés organiques volatils dans l’eau potable

Risk assessment focusing on exposure to mixtures by multiple routes can be improved with an understanding of the changes in internal doses due to interaction among chemicals. Physiologically based pharmacokinetic (PBPK) models are proven tools to predict the magnitude of interaction in various scenarios. In this study, four volatile organic compounds (VOCs) (toluene, nhexane, cyclohexane and isooctane) were chosen to represent petroleum products that could contaminate the drinking water (e.g. gasoline). PBPK models were used first to simulate exposure to a single chemical by a single route (inhalation, gavage) and simulate exposure to a mixture by multiple routes. PBPK models were validated by comparing simulations with in vivo data. These data were collected from groups of male Sprague-Dawley rats (n=5) exposed by inhalation (50 ppm of toluene, hexane; 300 ppm of cyclohexane and isooctane; 2-hr) or gavage (8.3, 5.5, 27.9, and 41.27 mg/kg, respectively, for toluene, hexane, cyclohexane and isooctane). For exposure to the mixture by multiple routes, same doses were used. The AUCs (mg/L x min) based on experimental data were 157.25, 18.77, 159.58 and 176.54 and the AUCs of the PBPKs model were 121.73, 21.91, 19.55 and 170.54, respectively, for toluene, hexane, cyclohexane and isooctane. Results from both PBPK models and in vivo data (single VOC, multiple routes vs. mixture, multiple routes) showed interactions between VOCs in the case of exposure to the mixture by multiple routes. This study demonstrated that the PBPK model is an effective tool to simulate exposure to mixtures of VOCs by multiple routes.

Keyphrases: PBPK, Risk assessment, Mixture, Multiple routes