Dans un environnement en constant changement, les fonctions exécutives (FRE) nous permettent d'organiser l'information en provenance de sources multiples, de s'adapter à des situations sociales complexes et d'inhiber les comportements inappropriés. Les recherches sur le fonctionnement exécutif ont été initiées en neuropsychologie, après avoir observé chez des patients frontaux, des difficultés à organiser leurs comportements quotidiens sans pour autant présenter de difficultés de langage ou de mémoire. Un grand nombre de tests neuropsychologiques sont disponibles afin d'évaluer les FE. Cependant, ces tests sont souvent critiqués pour leur complexité et leur manque de validité de construction. Le champ des FE manque en réalité de modèles théoriques précis qui permettraient de décrire ces fonctions et leurs potentielles interactions pour le contrôle des comportements complexes. En conséquence, les tâches sont souvent construites de manière intuitive, dans le présent travail de thèse, après revue d'un état de l'art sur les FE (Ch1), je propose une nouvelle tâche, le spatial-tapping, qui pourrait être utilisée en remplacement des tâches classiques complexes (Ch2). Je promeus également le potentiel de cette tâche à être utilisée dans des contextes cliniques (Ch3). Je présente finalement comment les analyses réalisées pour le spatial-tapping afin d'étudier les FE peuvent être transférées à des situations motrices plus complexes, comme la coordination bi-manuelle (Ch4). En conclusion, les résultats présentés dans ce travail de thèse sont en faveur de l'idée selon laquelle notre organisation mentale reflète la manière dont on organise nos mouvements. / In a constant changing environment, executive abilities allow us to organize sensory information of multiple sources and to adapt to diverse stuations while at the same time inhibiting inappropriate behaviors. research on the executive functions (EFS) have historical roots on neuropsychology, with the description of frontal patients that were showing disruptions in organizing their daily behaviors independently of any impairment in memory, language or general intelligence. A wide range of neuropsychological tools is used today to evaluate executive abilities : tower of London for planning, go-no-go for inhibition, etc. However, the classical tasks often present methodological limitations and they lack of correpondence between process and behavior. Furthermore, the field lacks of a compelling theory that make links between the EFS themselves. The present PHD work was an attempt to propose a novel task to assess the EFS in the place of the classical batteries of neuropsychological tasks. After offering an overview of the EF literature and presenting simple motor tasks that seem to target similar EFS than those described in neuropsychology (Ch1), I present the spatial-tapping task as a challenging paradigm to understand the relationships between the different EFS (Ch2), and its potential to be used in clinical settings (Ch3). The I present how a similar approach can be used to investigate how EFS intervenes in the control of more complex motor sequences, E.G. bi-manual tasks (Ch4). Overall, the results presented here support an emboided perspective of cognition with mental organization reflecting the way one plans motor sequences for adaptive behavior.

Submitted by PPG Ci?ncia da Computa??o (ppgcc@pucrs.br) on 2018-12-12T11:28:20Z No. of bitstreams: 1 Romulo Reis de Oliveira_DIS.pdf: 1719302 bytes, checksum: 005f38fa0c94cb6b97ce5f6ad6ec70ed (MD5) / Approved for entry into archive by Sheila Dias (sheila.dias@pucrs.br) on 2018-12-14T11:26:14Z (GMT) No. of bitstreams: 1 Romulo Reis de Oliveira_DIS.pdf: 1719302 bytes, checksum: 005f38fa0c94cb6b97ce5f6ad6ec70ed (MD5) / Made available in DSpace on 2018-12-14T11:50:26Z (GMT). No. of bitstreams: 1 Romulo Reis de Oliveira_DIS.pdf: 1719302 bytes, checksum: 005f38fa0c94cb6b97ce5f6ad6ec70ed (MD5) Previous issue date: 2015-04-24 / Hybrid synchrony virtual networks arose by combining network virtualization, which allows the co-existence of several virtual networks in the same shared physical substrate, providing infrastructure in a flexible and economic way, with partial synchrony network architecture, which is relevant in distributed systems in order to build reliable systems. One of the main challenges in network virtualization is the efficient mapping of virtual resources in the substrate network, since it is a NP-Hard complexity problem. When considering the synchrony of virtual and physical resources it becomes more difficult to map, making it unfeasible to calculate the optimal solution in real environments. Thus, heuristic approaches are necessary for finding semi-optimal solutions faster. In this work, four heuristics for mapping hybrid synchrony virtual networks are adapted. In order to evaluate these heuristics, two sets of experiments were executed. In the first set is compared the optimal solutions with their respective semi-optimal solutions, the results show the heuristics? efficiency are better when the virtual network requests are smaller, furthermore there were some semi-optimal solution mapping costs equivalent to the optimal solution mapping cost. The second set of experiments evaluates the heuristics performance using a physical substrate closer to real context and a larger number of virtual network requests. The results of this second set of experiments demonstrate that even with a larger number of virtual requests and a larger substrate, the solutions were computed in acceptable time. / As redes virtuais de sincronia h?brida surgiram da combina??o entre a virtualiza??o de redes, a qual permite a coexist?ncia de v?rias redes virtuais no mesmo substrato f?sico compartilhado fornecendo infraestrutura de maneira flex?vel e econ?mica, e arquitetura de redes com sincronia parcial, essa relevante em sistemas distribu?dos para construir sistemas confi?veis. Um dos principais desafios em virtualiza??o de redes ? o mapeamento eficiente dos recursos virtuais na rede de substrato, pois ? um problema de complexidade NP-Dif?cil. Ao considerar a sincronia dos recursos virtuais e f?sicos, se torna mais dif?cil efetuar esse mapeamento, inviabilizando o c?lculo da solu??o ?tima em ambientes reais. Sendo assim, abordagens heur?sticas s?o necess?rias para encontrar solu??es semi-?timas de maneira mais r?pida. Neste trabalho s?o adaptadas quatro abordagens heur?sticas para efetuar o mapeamento de redes virtuais de sincronia h?brida. Para avaliar o desempenho dessas heur?sticas foram efetuados dois conjuntos de experimentos. No primeiro conjunto de experimentos s?o comparadas as solu??es ?timas e as respectivas solu??es semi-?timas, os resultados indicaram que a efici?ncia das heur?sticas s?o melhores quando as requisi??es de redes virtuais s?o menores, al?m disso houveram alguns custos de solu??es semi-?timas equivalentes ao custo de mapeamento da solu??o ?tima. O segundo conjunto de experimento avalia o desempenho das heur?sticas utilizando um substrato de rede mais pr?ximo do contexto real e um maior n?mero de requisi??es de redes virtuais. Os resultados desse segundo experimento demonstram que mesmo com um n?mero maior de requisi??es de redes virtuais e um substrato maior, as solu??es foram calculadas em tempo aceit?vel.

Esta tese, apoiando-se no quadro de referência da Semiótica Tensiva, se propõe examinar a existência de uma gramática tensiva regedora das obras de vanguarda, que se põem sob a égide da \"tradição de rupturas\". Focalizando a descrição e a análise das operações formais dos objetos pictóricos, examina os traços heterogêneos constitutivos do objeto visual e sua estruturação, bem como o par opositivo continuidade (tradição) e ruptura (modernidade) na arte, com base nas relações entre formantes mínimos da gramática visual, que engendram uma gramática de continuidade (a função), responsável por duas subgramáticas, a de rompimento forte e a de rompimento fraco (funtivos). Daí as questões: seria a arte de vanguarda uma continuidade de rompimentos fracos ou de rompimentos fortes? De que tipo de rompimento se está falando quando se focalizam objetos estéticos do século XX? Toda ruptura constituiria um ato de rompimento, de maneira imediata, com todos os procedimentos da tradição, ou apenas a triagem de alguns procedimentos, preservando outros como elo entre o passado e o futuro? Dessas questões, depreendeu-se que a figuratividade é ponto central nas vanguardas ditas de ruptura. Tomada como parâmetro, a figuratividade seria um dos reguladores da continuidade pictórica de vanguarda, pois seria ela a característica que mais se acentua tanto em sua construção, como em sua desconstrução. No caso de rupturas progressivas (chamadas de rupturas em desenvolvimento), nem tudo é triado como eliminação: alguns traços tensivos são preservados. Observou-se atenuação da ruptura em traços reiterativos tanto de figurativização (diminuição de plasticidade), quanto de abstração (aumento de plasticidade). A tese está dividida em quatro capítulos. No capítulo 1, abordam-se tradição e ruptura nas artes plásticas, ou seja, continuidade e descontinuidade de valores estéticos. No capítulo 2, focaliza-se o pêndulo tensivo que contempla a oscilação entre plástico e figurativo, salientando valores de evolução e revolução. No capítulo 3, apoiando-se no plano da expressão, contemplam-se análises de estudos de caso e verificam-se predominâncias de plasticidade ou figuratividade, homologando-as com elementos do nível tensivo, como tonicidade e andamento. No capítulo 4, considera-se a emancipação plástica brasileira em relação à arte predominantemente europeia. Para reduzir o risco de viés teórico de ver na realidade apenas o que a teoria permite ver, bem como minimizar imperfeições analíticas, procedeu-se ao exame dos objetos estéticos considerando um percurso de dupla direção: da teoria ao objeto e do objeto à teoria. Foram comparados objetos de estéticas diferentes, objetos diferentes de uma mesma estética, objetos de um mesmo artista, mas postos em confronto e, por fim, um só objeto, considerando suas partes constitutivas. Para esse exame, além da teoria tensiva, serviram de base textos teóricos de artistas de variadas épocas, bem como manifestos teóricos. Esses procedimentos permitiram propor a substituição do conceito de ruptura pelo conceito de rompimento de dupla valência: uma de tônus mais forte e outra de tônus mais fraco, controladores da continuidade e da descontinuidade, que seriam reguladas por traços tensivos de mais e menos, duas forças que impediriam a chegada ao extremo do continuum. / This thesis, based on the reference framework of the Tense Semiotics, proposes to examine the existence of a tense grammar that rules the vanguard studies, which are placed under the aegis of the \"tradition of ruptures\". Focusing on the description and analysis of the formal operations of the pictorial objects, it examines the heterogeneous features constituting the visual object and its structuring, as well as the opposing pair continuity (tradition) and rupture (modernity) in art, based on the relationships between grammar, which generates a grammar of continuity (the function), responsible for two sub grammars, the one of strong rupture and the one of weak rupture (funtives). Hence the questions: would vanguard art be a continuation of weak disruptions or strong disruptions?What kind of breakthrough is being talked about when focusing on 20th century aesthetic objects? Would every rupture constitute an act of immediate rupture with all the procedures of the tradition, or only the screening of certain procedures, preserving others as a link between the past and the future? From these questions, it has been deduced that figurativeness is central to the so-called ruptured vanguards. Taken as a parameter, figurativity would be one of the regulators of the avant-garde pictorial continuity, since it would be the characteristic that is more accentuated both in its construction and in its deconstruction. In the case of progressive ruptures (called ruptures in development), not everything is classified as elimination: some tensile traces are preserved. It was observed attenuation of the rupture in repetitive traits of both figurativization (decrease of plasticity) and abstraction (increase of plasticity). The thesis is divided into four chapters. In chapter 1, tradition and rupture in the plastic arts are approached, that is, continuity and discontinuity of aesthetic values. In chapter 2, the tensile pendulum that contemplates the oscillation between plastic and figurative is focused, emphasizing values of evolution and revolution. In chapter 3, based on the expression plane, analyzes of case studies are contemplated and there are predominance of plasticity or figurativeness, homologating them with elements of the tensile level, such as tonicity and tempo. In chapter 4, the Brazilian plastic emancipation is considered in relation to the predominantly European art. In order to reduce the risk of a theoretical bias of actually seeing only what the theory allows us to see, as well as minimizing analytical imperfections, we proceeded to the examination of aesthetic objects considering a dual direction course: from theory to object and from object to theory. Objects of different aesthetics, objects different from the same aesthetics, objects of the same artist, but confronted, and finally, a single object, considering their constituent parts, were compared. For this examination, in addition to the tensive theory, theoretical texts of artists of various epochs, as well as theoretical manifestos, were used as basis. These procedures allowed proposing the replacement of the concept of rupture by the concept of double valence rupture: one of stronger tone and one of weaker tone, controllers of continuity and discontinuity, which would be regulated by tensor numbers of plus and minus two forces which would prevent the arrival at the extreme of the continuum.

<p>Ecological models have problems showing the positive relationship between diversity and stability found in nature. Theory states that complex food webs have high extinction risks and low stability. However, persistent food webs found in nature are large and complex containing many interconnections between species. There are many possible mechanisms enabling persistent food webs such as; complex interaction patterns, asynchronous fluctuations of species densities, environmental fluctuations and spatial distribution. These factors have not been used in classical models. In this study, coloured environmental 1/f noise and dispersal between subpopulations were incorporated into a diamond shaped food web based on a model by Vasseur and Fox 2007. Contradictions between theoretical and empirical results regarding food webs can be resolved by detailed analyses of models, withholding stabilizing mechanisms. Weak environmental 1/f noise generated an increased coefficient of stability but the stabilizing effect of noise can be questioned because of a decreased mean food web biomass and reduced stabilizing effect when reddened. However, detailed studies of the food web revealed that noise can redistribute density proportions between species, evading lowest species density and thereby increase food web resistance to demographic stochasticity and catastrophes. Noise induced density proportion shifts imply that large population sizes are no insurance towards future increase in environmental variance. Synchrony of species environmental responses and dispersal between subpopulations can both have major influences on stability and extinction risk of smaller food webs indicating that spatial structure could be one of the dominating factors stabilizing complex food webs found in nature.</p>

Ecological models have problems showing the positive relationship between diversity and stability found in nature. Theory states that complex food webs have high extinction risks and low stability. However, persistent food webs found in nature are large and complex containing many interconnections between species. There are many possible mechanisms enabling persistent food webs such as; complex interaction patterns, asynchronous fluctuations of species densities, environmental fluctuations and spatial distribution. These factors have not been used in classical models. In this study, coloured environmental 1/f noise and dispersal between subpopulations were incorporated into a diamond shaped food web based on a model by Vasseur and Fox 2007. Contradictions between theoretical and empirical results regarding food webs can be resolved by detailed analyses of models, withholding stabilizing mechanisms. Weak environmental 1/f noise generated an increased coefficient of stability but the stabilizing effect of noise can be questioned because of a decreased mean food web biomass and reduced stabilizing effect when reddened. However, detailed studies of the food web revealed that noise can redistribute density proportions between species, evading lowest species density and thereby increase food web resistance to demographic stochasticity and catastrophes. Noise induced density proportion shifts imply that large population sizes are no insurance towards future increase in environmental variance. Synchrony of species environmental responses and dispersal between subpopulations can both have major influences on stability and extinction risk of smaller food webs indicating that spatial structure could be one of the dominating factors stabilizing complex food webs found in nature.

Il presente lavoro si inserisce nel filone degli studi terminologici francesi con l’analisi della terminologia della moda, di cui è indagato, quale campo di ricerca privilegiato, il settore del vêtement d’extérieur. Viene adottato un modello descrittivo ampio, fondato sulla riconciliazione teorica e metodologica tra diacronia e sincronia e su un approccio interdisciplinare alla disciplina terminologica. Lo studio è articolato in due parti: la prima sezione è dedicata alla ricostruzione della terminologia del vêtement d’extérieur in diacronia. Dopo una premessa metodologica circa la redazione delle schede terminologiche, è tracciato il percorso che conduce, dal ristretto nucleo di unità terminologiche in antico francese, alla complessa rete lessicale nel francese contemporaneo. Nella seconda sezione, sono approfondite le dimensioni applicate, che vanno dall’elaborazione informatica di ontoterminologie allo studio della variazione terminologica in contesti professionali eterogenei, fino alla rassegna di prodotti lessicografici e terminografici della moda, in contesti di comunicazione monolingue e plurilingue. Infine, dopo aver enucleato l’approccio alla terminologia, si ripercorrono i risultati salienti della ricerca e si delineano ulteriori prospettive di indagine. / This work analyses the French terminology of fashion, particularly the field of the outerwear, within the framework of French terminological research. A broad descriptive model is adopted, based on the theoretical and methodological reconciliation between diachrony and synchrony, as well as on an interdisciplinary approach to terminology. The study is divided into two parts: the former is devoted to the historical reconstruction of the outerwear terminology. After a methodological introduction about term records, we trace the path leading from the small group of terminological units in Old French to the complex lexical network in contemporary French. In the latter section, the applied dimensions are explored, including the construction of “ontoterminologies”, the study of terminology variation in heterogeneous professional contexts, and the list of lexicographical and terminographic resources for fashion, both in monolingual and multilingual communication. Finally, the description of the approach to terminology is followed by the main results of the research and by further perspectives of study.

No description available.

Flow is a mental state characterised by a feeling of energised focus, complete involvement and success when fully immersed in an activity. The dimensions of and the conditions required for flow to occur have been explored in a broad spectrum of situational contexts. The close relationship between flow and peak performance sparked an interest in ways to induce flow. However, any process of flow induction requires a measure to trace the degree to which flow is in fact occurring. Self-reports of the flow experience are subjective and provide ad hoc information. Psycho-physiological measures, such as EEG, can provide objective and continuous indications of the degree to which flow is occurring. Unfortunately few studies have explored the relationships between psycho-physiological measures and flow. The present study was an attempt to determine the EEG correlates of flow under conditions of peak performance. Twenty participants were asked to perform a continuous visuomotor task 10 times. Time taken per task was used as an indicator of task performance. EEG recordings were done concurrently. Participants completed an Abbreviated Flow Questionnaire (AFQ) after each task and a Game Flow Inventory (GFI) after having finished all 10 tasks. On completion, performance times and associated flow scores were standardised where after the sample was segmented into a high flow - peak performance and a low flow - low performance level. Multi-variate analysis of variance (MANOVA) was conducted on the performance, flow and EEG data to establish that a significant difference existed between the two levels. In addition, a one-way analysis of variance between high and low flow data was conducted for all variables and main effects were established. Inter-correlations of all EEG data at both levels were then conducted across four brain sites (F3, C3, P3, O1). In high flow only, results indicated increased lobeta power in the sensorimotor cortex together with a unique EEG pattern showing beta band synchronisation between the prefrontal and sensori-motor areas and de-synchronisation between all other areas, while all other frequencies (delta, theta, alpha, lobeta, hibeta, and gamma) remained synchronised across all scalp locations. These findings supported a theoretical neuropsychological model of flow. / Psychology / D. Com. (Consulting Psychology)

Notre thèse, intitulée La dynamique linguistique des relations spatiales en créole réunionnais et sa contribution à la question de l'illettrisme, s'inscrit en linguistique descriptive et choisit d'interroger la problématique de la spatialité avec les outils et les méthodes de la linguistique fonctionnelle en synchronie dynamique pour le créole réunionnais (Martinet : 1989, Staudacher-Valliamée : 1999). Les enquêtes réalisées sur le terrain créolophone réunionnais rassemblent un corpus de 24 idiolectes dans un échantillonnage représentatif de plusieurs classes d'âge, de lieux géographiques et de difficultés de pratique du français (langue officielle). L'analyse syntaxique et prosodique des relations spatiales repose sur un échantillonnage de 607 syntagmes prédicatifs. Cette thèse établit le lien entre les relations spatiales, le programme valenciel (Tesnière : 1965), l'ordre des mots en structures prédicatives. Le modèle fonctionnaliste est complété par les paramètres de la sémantique générale de Pottier (1992). Cette thèse apporte un éclairage nouveau avec l'identification du système spatial créole réunionnais, ce qui permet de le classer parmi les langues à cadre verbal et satellitaire (Talmy : 2008). Par les toponymes, le système spatial est ancré dans la mémoire collective créole et l'Histoire insulaire créolophone. La tradition orale créole implique des situations d'illettrisme spécifiques. Nos informateurs témoignent de leurs situations d'analphabétisme, d'illettrisme et de leurs difficultés d'apprentissage. Les retombées didactiques et pédagogiques de notre recherche contribuent à la remédiation ainsi qu'à l'outillage pour l'apprentissage du système spatial français. / Our thesis, entitled Linguistic dynamic of spatial relationships in Reunion Creole and its contribution to the illiteracy issue, fits in descriptive linguistic questioning the problematic of spatiality with tools and methods of functional linguistic in dynamic synchrony for Reunion Creole (Martinet : 1989, Staudacher-Valliamée : 1999). Surveys conducted in the field of Reunion Creole speakers gather a corpus of 24 idiolects in a representative sampling including several age groups, geographical locations and difficulty to practice French (official language of the department). Syntactic and prosodic analysis of spatial relationships relies on a sampling of 607 predicative phrases. This thesis establishes the link between spatial relationships, valence program (Tesnière : 1965), word order in predicative structures. The functionalist model is completed by Pottier's general semantic parameters (1992). This thesis brings a new perspective with the identification of the Reunion Creole spatial system, which allows its classification among the framework of verbal and satellite languages (Talmy : 2008). By the place of names, spatial system is rooted in Creole collective memory and Reunion Creole speaker insular History. Oral creole tradition involves specific situations of illiteracy. Our informants demonstrate their analphabetism, illiteracy and their learning difficulties. The didactic and educational fallout from our research contribute to the remediation and tooling for the learning of French spatial system descriptive linguistic.

Mule deer (Odocoileus hemionus) are an iconic species of wildlife, and populations of mule deer across much of the western U.S. have experienced recent fluctuations in size. Factors that affect the survival and subsequent recruitment of juveniles may be the preeminent cause of population fluctuations for mule deer in many areas. Many factors, including habitat loss, extreme weather, intense predation, timing and synchrony of parturition, and competition with other species may be influencing these changes. We studied two potential factors that can influence the survival of neonate mule deer in southern Utah. To better understand how predation affects mule deer, we first implemented a study of the response of mule deer to removal of coyotes in southern Utah. We monitored survival and cause-specific mortality of neonate mule deer in areas where coyotes were removed and where they were not removed. We used multi-model inference within Program MARK and a known-fate model to estimate survival of neonate mule deer in both treatments (removal and non-removal), and to investigate factors potentially influencing survival. Our results indicated that coyote control can decrease mortality and increase survival of neonate mule deer in some situations. Removal of coyotes was most effective when removal efforts occurred for multiple consecutive years, and when control efforts occurred in or near fawning habitat. Second, we examined how synchrony of parturition affects the survival and cause-specific mortality of neonate mule deer. Reproductive synchrony is a strategy that influences the survival of juveniles and the growth of populations. Our objective was to test three possible explanations for the synchrony of parturition in mule deer; 1) pressure of predation on newborns, 2) a hybrid of predation and environmental effects, and 3) weather and food availability. To determine the effects of the timing of parturition on the survival and predator-related mortality of neonate mule deer, we used multi-model inference within Program MARK and a known-fate model. Our results indicated that the timing of parturition influenced survival and predator-related mortality of neonate mule deer. There was a lag between the onset of parturition of mule deer and predation of mule deer by fawns; individuals born close to the onset of parturition had higher survival and lower predator-related mortality than those whose births were delayed relative to the onset of parturition. Since predators selected for neonate mule deer that were born late, predator learning may partially explain reproductive synchrony in mule deer. Environmental factors may have a greater effect than predation on the survival of early-born individuals.