Made available in DSpace on 2016-08-17T14:52:53Z (GMT). No. of bitstreams: 1 Ricardo Henrique Bezerra Azoubel.pdf: 588389 bytes, checksum: 40c0c99f808c27d0a6967b9d18c9c22a (MD5) Previous issue date: 2004-09-24 / This work presents a platform of tests (testbed) inexpensive, constructed in a controlled environment composed by microcomputers and free softwares. It is implemented, in such platform, the differentiated service model (DiffServ), with expedited forwarding (PHB EF). It is basically considered, from the collection of metrics main of QoS (delay, jitter, loss and throughtput), the performance analysis of voice characteristic traffics, when submitted to experimental tests in some scenes and conditions. Initially, in an environment capable to differentiate traffics, flows generated by standardized voice coder/decoder (G.711 and G.726) are modeled, in which the packets size and the amount of aggregate flows are varied, in scenes with and without QoS. It is compared, after that, the behavior of flows generated by activity-silence (ON-OFF) and continuous (CBR) sources. Can be perceived in this study how much the packets size variation influence in the performance of the most priority packets. It is carried, in the sequence, a specific analysis of the aggregation factor in flows generated by ON-OFF sources, in which can be observed the action of the basic principle of the model DiffServ, where aggregate flows receive differentiated treatment. It is studied, finally, through the use of transport protocols (UDP and TCP) and of elastic flows of FTP type, how much the best effort traffic confuses the performance of voice modeled flows. / Este trabalho apresenta uma plataforma de testes (testbed) sem custos, construída num ambiente controlado composto por microcomputadores e softwares livres. Implementa-se, em tal plataforma, o modelo de serviço diferenciado (DiffServ), com encaminhamento expresso (PHB EF). Propõe-se, fundamentalmente, a partir da obtenção das principais métricas de QoS (atraso, jitter, perda e vazão), a análise do desempenho de tráfego característico de voz, quando submetido a testes experimentais em vários cenários e condições. Inicialmente, num ambiente capaz de diferenciar tráfego, modelam-se fluxos gerados por codificadores/decodificadores de voz padronizados (G.711 e G.726), em que se varia o tamanho dos pacotes e a quantidade de fluxos agregados, em cenários com e sem QoS. Compara-se, em seguida, o comportamento de fluxos gerados por fontes atividadesilêncio (ON-OFF) e contínuas (CBR). Pode-se perceber nesse estudo o quanto a variação do tamanho dos pacotes impacta no desempenho dos pacotes mais prioritários. Realiza-se, na seqüência, uma análise específica do fator agregação em fluxos gerados por fontes ONOFF e observa-se a atuação do princípio básico do modelo DiffServ, onde fluxos agregados recebem tratamento diferenciado. Estuda-se, por fim, através da utilização de protocolos de transporte (UDP e TCP) e de fluxos elásticos do tipo FTP, o quanto o tráfego de melhor esforço impacta no desempenho de fluxos modelados de voz.

Made available in DSpace on 2016-08-17T14:52:57Z (GMT). No. of bitstreams: 1 Jose Coelho de Melo.pdf: 1424511 bytes, checksum: 76fbc2d3ff58f82123072e2b8323be1a (MD5) Previous issue date: 2005-03-14 / This work presents several ways of using mechanisms of Quality of Service (QoS) in networks hardwired for links of short band. It is demonstrated that the use of mechanisms of QoS brings profits of performance for priority applications and rationality in the use of band resources. The work is developed in a test platform of Previdência Social. Implementations of the PHBs EF, Afs and BE are tested. The work has evaluated the capacities to offer guaranteed band, traffic priority, conditioning of traffic and the impact of the competition between traffic classes. The experiments are mounted using the architecture of differentiated services (DiffServ) of platform Cisco, that is the standard in the network of the Previdência Social and are manipulated the mechanisms of classification, control of congestion, policing and conformation of traffic. The results give subsidy for implementation of some models of QoS in IP networks, mainly for those that serve short band. / Este trabalho apresenta diversas maneiras de utilização dos mecanismos de Qualidade de Serviço (QoS) em redes ligadas por enlaces de banda estreita. É demonstrado que o uso de mecanismos de QoS traz ganhos de performance aos aplicativos prioritários e racionalidade no uso de recursos de banda. O trabalho é desenvolvido em uma plataforma de teste que retrata um seguimento da rede da Previdência Social. São testadas possíveis implementações dos PHBs EF, Afs e BE. São avaliadas as capacidades de oferecer largura de banda garantida, priorização de tráfego, condicionamento de tráfego e o impacto da concorrência entre classes de tráfego. Os experimentos são montados utilizando a arquitetura de serviços diferenciados (DiffServ) da plataforma Cisco, que é o padrão na rede da Previdência Social, e são manipulados os mecanismos de classificação, controle de congestionamento, policiamento e conformação de tráfego. O resultado apresentado dá subsídio para implementação de vários modelos de QoS em redes IP, principalmente para redes servidas por banda estreita.

O presente trabalho tem como objetivo a pesquisa psicanalítica do imaginário da mulher contemporânea sobre a experiência amorosa feminina. Estabelece, metodologicamente, um enquadre investigativo diferenciado a partir de um uso paradigmático do Jogo do Rabisco de D. W. Winnicott, que permite a concepção de um conjunto de pranchas figurativas de situações cotidianas. O diálogo entre a pesquisadora e a pessoalidade coletiva Mulher realiza-se pela abordagem de duas entrevistadas. As narrativas emergentes, onde se entrelaçam histórias inventadas e lembranças pessoais, favoreceram a criação/encontro de um campo psicológico não consciente. Neste campo se evidencia que, em certas modalidades de vínculo, formas regredidas de dependência emocional são mascaradas por manifestações amorosas e eróticas. Em termos do imaginário coletivo da atualidade, esta perspectiva torna possível entender que a exaltação do sofrimento amoroso da mulher acoberta o não reconhecimento de dificuldades existenciais vinculadas a aspectos de self não plenamente realizados. / The object of the current work is the psychoanalytic study of the feminine loving experience held within the imagery of contemporary women. It methodologically establishes a differentiated investigative setting from the paradigmatic use of the Squiggle Game by D. W. Winnicott, which allows the making of a set of cards depicting daily life situations. The dialogue between the researcher and the persona of the collective Woman is developed along two separate interviews. The emerging narratives, where made up stories and personal memories are entwined, favored the creation/encounter of a non-conscious psychological field. This field made it clear that in some kinds of links, regressed ways of emotional dependence are masked by loving and erotic demonstrations. In terms of the collective imagery of the present days, this point of view makes it possible to understand that the exaltation of women’s love related suffering, covers up the not acknowledged existential difficulties related to aspects of the self which have not been totally fulfilled.

Estudos publicados a partir da década de 60 evidenciam o potencial terapêutico da participação de animais de estimação em situações clínicas. Desde então, as pesquisas e as práticas das denominadas Terapia Assistida por Animais (TAA) e Atividade Assistida por Animais (AAA) estão em amplo crescimento. A presente pesquisa analisa 12 registros filmados dos encontros realizados a partir da parceria entre uma escola de educação especial e um canil. Os encontros aconteciam num sítio, a freqüência era semanal e os horários eram fixos. Participaram quatro adolescentes com síndrome de Down. A narrativa dos encontros entre esses adolescentes e cães numa situação estabelecida tem por objetivo a elaboração de uma reflexão teórica cujo propósito é considerar o uso de um enquadre diferenciado que inclui a presença do cão como recurso. A lente sob a qual tais fenômenos são analisados e compreendidos é a psicanálise de D. W. Winnicott. A investigação psicológica dos encontros evidencia a necessidade de levar em consideração o contexto humano oferecido pelos profissionais e as relações interpessoais estabelecidas. Pode-se observar que a maneira de se relacionar com o animal apresenta-se qualitativamente diferente das relações essencialmente humanas e das com objetos inanimados. Destacando a complexidade dos fenômenos observados entre as pessoas e os animais, percebeu-se que os cachorros interagiam com as pessoas não a partir das intenções ou sentimentos destas, ou ainda por meio de um discurso representativo: o cão reagia ao fato, ao comportamento humano, a comunicação ocorria de forma não-verbal. Outra possível função dos cachorros foi a de despertar diferentes aspectos do self, manifestados pelos adolescentes em suas atitudes, ações e verbalizações, facilitando a expressão de sentimentos. A análise também revela que a maneira de ser do cachorro – através de suas ações de atender ou não aos comandos, de se deixar manipular ou não, de ser uma presença constante e segura, de ter uma inteireza e continuidade de ser – sugere a emergência de maior espontaneidade por parte dos adolescentes. Por fim, são tecidas reflexões teóricas que sustentam a possibilidade de uma clínica winnicottiana com enquadre diferenciado que inclui o cachorro como recurso. / Studies that have been published since the 1960s suggest the therapeutical potential of the use of pets in clinical situations. The research on and the practice of the called Animal Assisted Therapy (AAT) and Animal Assisted Activity (AAA) have become more and more popular ever since. The present research analyses 12 filmed meetings that aim at promoting such interaction between dogs and four adolescents with Down Syndrome, carried out by a special education school and a kennel. These weekly meetings took place in a small farm and had been previously scheduled, always at the same time. The description of these meetings between the adolescents and the dogs in an arranged situation aims at elaborating a theoretical reflection which has the objective of taking into account the use of a differentiated setting that involves the presence of the dog as a resource. The lens under which such phenomena are analysed and understood is the W.D.Winnicott psychoanalysis. The psychological investigation of the meetings explicits the need to take the human context offered by the professionals and the interpersonal relationships that take place into account. It is clear to notice that the way the adolescents relate to the animals is qualitatively different from the way they do in exclusively human relationships or even in their relationships with inanimate objects. It’s important to highlight that, among other complex phenomena that we observe in the relationship between people and animals, the communication between them is non-verbal: the dogs react to the human behaviour and not to their intentions, feelings or discourse. Also, the dogs have an important role in awakening different aspects of the self, acted out by the adolescents in their attitudes and speech, which makes the expression of their feelings easier. The analysis also shows that the dog’s behaviour– – whether or not responding to the commands of the adolescents, permitting or not being handled by them, of being a constant and safe presence, as well as its wholeness and continuity of being - suggests the emergence of more room for the adolescents’ spontaneity. Finally, some reflections that support the possibility of a winnicottian clinic with a differentiated setting that have the dog as a resource are presented.

L’inflammation neurogène cutanée (INC) est une inflammation de la peau induite par l’activation des fibres nerveuses intra-épidermiques qui secrètent des neuropeptides tels que la substance P (SP). L’INC est impliquée dans des dermatoses inflammatoires prurigineuses comme le psoriasis, la dermatite atopique (DA) et le syndrome de Netherton (SN). Un nouveau concept émerge, suggérant que les kératinocytes sont également des acteurs majeurs de l’INC. Le récepteur activé par des protéases de type 2 (PAR-2) est fortement incriminé dans l’INC associée à ces dermatoses, ce qui permet de comprendre les voies du prurit non-histaminergique. Les enjeux thérapeutiques sont de taille puisqu’il n’existe actuellement aucun traitement efficace permettant la prise en charge spécifique du prurit histamino-indépendant au cours des dermatoses prurigineuses associées à l’INC.Bien que le rôle de PAR-2 dans la sécrétion de neuropeptides à partir des neurones sensoriels soit clairement établi, son implication dans la modulation de gènes pouvant contribuer à l’entretien ou l’amplification de l’INC reste méconnue. Le rôle inflammatoire de PAR-2 a également été démontré sur des kératinocytes cultivés en monocouche via la sécrétion de cytokines par des mécanismes dépendants du Ca2+. La surexpression de PAR-2 et la perte d’expression de certains canaux calciques impliqués dans sa réponse calcique dans les kératinocytes différenciés suggèrent des mécanismes d’action de PAR-2 différents pour ceux-ci. Dans le but d’étudier le rôle pro-inflammatoire de PAR-2 au cours des dermatoses prurigineuses, nous avons analysé l’effet de son activation sur des monocultures de neurones sensoriels issus de ganglions rachidiens dorsaux (GRD) de rat et de kératinocytes humains différenciés (DhPK), en criblant l’expression de médiateurs de l’inflammation. Pour approfondir, les voies calciques de PAR-2 sous-jacente à la modulation d’expression dans les kératinocytes différenciés, des expériences d’imagerie calcique ont été réalisées et différents antagonistes ont été utilisés pour analyser les acteurs impliqués.Dans le cadre d’un partenariat avec les laboratoires dermatologiques d’Uriage, nous avons testé les effets de l’eau thermale d’Uriage sur la modulation de gènes induite par PAR-2 dans les DhPK. Nous avons également utilisé une lignée de PC12 différenciables en neurones par le NGF afin de les utiliser comme alternatives des neurones sensoriels issus des GRD de rat pour l’étude de l’INC.L’ensemble des résultats obtenus au cours du criblage des gènes modules par PAR-2 confirme le rôle pro-inflammatoire de PAR-2 dans les neurones sensoriels de rat et dans les DhPK. La découverte d’une nouvelle voie calcique de PAR-2 dans les DhPK offre de nouvelles pistes thérapeutiques pour les dermatoses prurigineuses telles que le psoriasis, la DA et le NS. Les résultats obtenus avec l’eau thermale d’Uriage peuvent présenter une perspective thérapeutique pour les patients souffrants de dermatoses prurigineuses réfractaires aux traitements conventionnels. L’utilisation d’une lignée neuronale comme lesPC12 pour l’étude de l’INC serait une alternative utile dans le développement des tests cosmétiques avec les industriels pour notre laboratoire. / Cutaneous neurogenic inflammation (CNI) is an inflammation of the skin induced by the activation of intraepidermal nerve fibers that release neuropeptides such as substance P (SP). CNI is involved in pruritic inflammatory skin disorders such as psoriasis, atopic dermatitis (AD) and Netherton syndrome (NS). A new concept is growing, suggesting that keratinocytes could also trigger INC. The proteases activated receptor 2 (PAR-2) is strongly incriminated in CNI associated with these dermatoses, which allow to understand the histamine-independent itching pathways. The therapeutic stakes are high since there is currently no effective treatment allowing the specific management of histamine-independent pruritus during skin disorders associated with CNI.Although the role of PAR-2 in the secretion of neuropeptides from sensory neurons is clearly established, its involvement in the modulation of genes involved in the maintenance or amplification of CNI remains unknown. The inflammatory role of PAR-2 on keratinocytes has also been demonstrated through the production of cytokines in a Ca2+-dependent mechanisms. The overexpression of PAR-2 and the loss of ORAI1 expression, a calcium channel following keratinocytes differentiation suggest different signaling pathways downstream to PAR-2 activation between undifferentiated and differentiated keratinocytes.In order to study the pro-inflammatory role of PAR-2 during pruritic dermatoses, we analyzed the effect of its activation on rat primary sensory neurons from dorsal spinal ganglia (DRG) and on differentiated human primary keratinocytes (DhPK) by screening the expression of inflammatory mediators. To deepen the Ca2+ pathways underlying PAR-2-mediated inflammatory mediator modulation in DhPK, we performed Ca2+ imaging experiments and different antagonists were used to analyze the involvement of intracellular actors. In a partnership with the dermatological laboratories of Uriage, we tested the effects of Uriage thermal water on PAR-2-induced gene modulation in DhPK. We also used a PC12 cell line differentiable in neurons by the NGF in order to use them as alternatives of rat primary sensory neurons from DRG for the study of INC. We also used a PC12 cell line differentiable in neurons by the NGF use them as alternatives of rat primary sensory neurons from DRG for the study of INC.The results obtained during the screening of the PAR-2-modulated genes confirmed the proinflammatory role of PAR-2 in rat primary sensory neurons and in DhPK. The discovery of a new PAR-2-mediated Ca2+ pathway in DhPK offers new therapeutic pathways for pruritic dermatoses such as psoriasis, AD and NS. The results obtained with the thermal water of Uriage can present a therapeutic perspective for patients suffering from pruritic dermatoses refractory to conventional treatments. The use of a neuronal cell line as the PC12 for the study of INC would be an useful alternative in the development of cosmetic tests.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Soil samples from sampling grids is currently the leading precision farming tool used in Brazil. But it still has doubts about the economic feasibility of using grids with high density points. New technologies such as the use of management zones (MZ) to guide soil samples have been studied in order to reduce the number of samples and consequently the sampling costs while maintaining the quality of the information obtained. However, this method lacks scientific information about its efficiency. The aim of this study was to evaluate the technical efficiency (chapter I) mapping chemical attributes of soil and economic viability (chapter II) of the recommendations of fertilizers and from the parameters obtained by conventional sampling, sample grids and MZ delimited by different methodologies. The study was carried out in Boa Vista Missões - RS, on an area of 118,9 ha. The soil sampling was carried out in 2015, using a sample grid of 0.5 ha. From the systematic elimination of sample points simulated the use grids; 1, 2, 3 and 4.5 ha. The MZ were defined based on data altimetry of the area and the yield maps. To Chapter I used the data of P, K and pH which were submitted to descriptive statistical analysis. Data collected in sampling grid was submitted to geostatistical analysis. The accuracy of thematic maps was evaluated from the Pearson correlation and coefficient of relative deviation. For chapter II we used the P, K and SMP index to generate recommendations of P2O5, K2O and lime, respectively. The recommendation of errors were calculated in relation to the reference grid (0.5 ha) in application area (ha) kg of fertilizer and in real (R$), later smpling costs were compared with the total cost of errors recommendation. The increase in the size of the sampling grid resulted in loss of information on the spatial variability of attributes and concenquentemente raised the deviations in both fertilizer and corrective recommendations. For a proper assessment of the spatial variability of soil chemical attributes and an accurate prescription of inputs recommends the use of sampling grid of 0.5 ha. / A amostragem de solo a partir de grades amostrais é atualmente a principal ferramenta de agricultura de precisão utilizada no Brasil. Porém, ainda se tem dúvidas sobre a viabilidade econômica da utilização de grades com alta densidade de pontos. Novas tecnologias como o uso de zonas de manejo (ZM) para orientar amostragens de solo têm sido estudadas, visando reduzir o número de amostras e consequentemente os custos de amostragem, mantendo a qualidade das informações obtidas. Porém, tal metodologia carece de informações científicas sobre a sua eficiência. Objetivou-se com este estudo avaliar a eficiência técnica (capitulo I) do mapeamento dos atributos químicos do solo e a viabilidade econômica (capitulo II) das recomendações de fertilizantes e corretivos a partir dos parâmetros obtidos através da amostragem convencional, grades amostrais e ZM delimitadas por distintas metodologias. O estudo foi realizado em Boa Vista das Missões - RS, em uma área de 118,9 ha. A amostragem de solo foi realizada em 2015 através de uma grade amostral de 0,5 ha. A partir da eliminação sistemática de pontos amostrais, simulou-se a utilização de grades de 1, 2, 3 e 4,5 ha. As ZM foram delimitadas com base em dados altimétricos da área e de mapas de produtividade. Para o capítulo I utilizou-se os dados de P, K e pH os quais foram submetidos à análise estatística descritiva. Os dados coletados em grade amostrais foram submetidos à analise geoestatística. A acurácia dos mapas temáticos foi avaliada a partir da correlação linear de Pearson e coeficiente de desvio relativo. Para o capitulo II utilizou-se os teores de P, K e índice SMP para gerar as recomendações de P2O5, K2O e calcário, respectivamente. Calcularam-se os erros de recomendação em relação à grade referencia (0,5 ha) em área de aplicação (ha), kg de fertilizante e em reais (R$). Posteriormente os custos de amostragem foram comparados com os custos totais de erros de recomendação. O aumento da dimensão da grade amostral resultou em perdas de informações sobre a variabilidade espacial dos atributos e consenquentemente elevou os desvios nas recomendações tanto de fertilizantes quanto de corretivo. Para uma adequada aferição da variabilidade espacial dos atributos químicos do solo e uma acurada prescrição de insumos recomenda-se a utilização de grade amostral de 0,5 ha.

[pt] Este trabalho faz um estudo da arquitetura Diffserv para oferecimento de QoS na internet.São revistos conceitos básicos e descritos os principais mecanismos de controle de tráfego.Utilizando o software NS2, avalia-se o desempenho desses algoritmos de controles de tráfego.Para um cenário específico foram estudados: disciplinas de serviço, mecanismos de gerenciamento de buffers, para diferentes fontes de tráfego, procurando-se obter medidas de desempenho que possam ser úteis em projetos de rede com qualidade de serviço. / [en] This work presents a Diffserv architecture study to provide QoS in the Internet. A review of some basic concepts of the main traffic control algorithm and a performance evaluation, through the NS simulation program, is done. In order to get important performance measurement of the QoS network, it was done, for a specific scenario, a study of the queue discipline, queue activity management, with different traffic source.

An important goal of modern data networks is to support multiple applications over a single network infrastructure. The combination of data, voice, video and conference traffic, each requiring a unique Quality of Service (QoS), makes resource dimensioning a very challenging task. To guarantee QoS by mere over-provisioning of bandwidth is not viable in the long run, as network resources are expensive. The aim of proper resource dimensioning is to provide the required QoS while making optimal use of the allocated bandwidth. Dimensioning parameters used by service providers today are based on best practice recommendations, and are not necessarily optimal. This dissertation focuses on resource dimensioning for the DiffServ network architecture. Four predefined traffic classes, i.e. Real Time (RT), Interactive Business (IB), Bulk Business (BB) and General Data (GD), needed to be dimensioned in terms of bandwidth allocation and traffic regulation. To perform this task, a study was made of the DiffServ mechanism and the QoS requirements of each class. Traffic generators were required for each class to perform simulations. Our investigations show that the dominating Transport Layer protocol for the RT class is UDP, while TCP is mostly used by the other classes. This led to a separate analysis and requirement for traffic models for UDP and TCP traffic. Analysis of real-world data shows that modern network traffic is characterized by long-range dependency, self-similarity and a very bursty nature. Our evaluation of various traffic models indicates that the Multi-fractal Wavelet Model (MWM) is best for TCP due to its ability to capture long-range dependency and self-similarity. The Markov Modulated Poisson Process (MMPP) is able to model occasional long OFF-periods and burstiness present in UDP traffic. Hence, these two models were used in simulations. A test bed was implemented to evaluate performance of the four traffic classes defined in DiffServ. Traffic was sent through the test bed, while delay and loss was measured. For single class simulations, dimensioning values were obtained while conforming to the QoS specifications. Multi-class simulations investigated the effects of statistical multiplexing on the obtained values. Simulation results for various numerical provisioning factors (PF) were obtained. These factors are used to determine the link data rate as a function of the required average bandwidth and QoS. The use of class-based differentiation for QoS showed that strict delay and loss bounds can be guaranteed, even in the presence of very high (up to 90%) bandwidth utilization. Simulation results showed small deviations from best practice recommendation PF values: A value of 4 is currently used for both RT and IB classes, while 2 is used for the BB class. This dissertation indicates that 3.89 for RT, 3.81 for IB and 2.48 for BB achieve the prescribed QoS more accurately. It was concluded that either the bandwidth distribution among classes, or quality guarantees for the BB class should be adjusted since the RT and IB classes over-performed while BB under-performed. The results contribute to the process of resource dimensioning by adding value to dimensioning parameters through simulation rather than mere intuition or educated guessing. / Dissertation (MEng (Electronic Engineering))--University of Pretoria, 2007. / Electrical, Electronic and Computer Engineering / unrestricted

L’objectif de cette recherche est d’analyser l’impact des processus éducatifs sous-jacents à l’élaboration du rapport au savoir chez des garçons et des filles tunisiens scolarisés en première année de l’école primaire. Nous centrons notre étude sur l’analyse des processus psychologiques selon les dimensions impliquées dans la construction identitaire et sociale du sujet. En accord avec notre approche interactionniste sociale qui privilégie l’étude de l’interstructuration entre l’individu et ses milieux de vie, nous avons mené des entretiens auprès de 16 enfants et des trois dyades : parents-enfants, élèves-enseignants et parents-enseignants. Notre approche qualitative repose sur une démarche d’analyse inductive basée essentiellement sur l’étude de cas singuliers de garçons et de filles selon des styles éducatifs prototypiques. Les résultats révèlent que les enfants élaborent des formes hétérogènes de rapport au savoir dès le début de l’entrée à l’école. Nos analyses permettent d’établir l’existence d’une concordance entre les styles éducatifs parentaux et les figures du rapport au savoir élaborées par les jeunes enfants-élèves. Il s’avère que si l’influence du milieu familial est déterminante, elle n’est pas exclusive si nous considérons d’une part, l’action dialectique des diverses milieux de vie et d’autre part, l’activité de réappropriation singulière du sujet comme acteur de son propre développement. De ce point de vue, les interactions avec l’enseignant peuvent donner du sens aux activités scolaires, enrichir l’expérience scolaire et susciter le rapport au savoir des élèves. / This research aims to analyse the impact of educational processes underlying the elaboration of the relationship to knowledge among Tunisian boys and girls in the first year of primary school. We focus our study on the analysis of psychological processes according to the dimensions involved in the identity and social building of the subject. In line with our social interactionism theory, which favours the study of the interstructuration between the individual and his environment, we have carried interviews among 16 children and the three dyads : parents-children, students-teachers and parents-teachers. Our qualitative approach is based on an inductive analysis mainly focused on the study of singular cases of boys and girls according to prototypical educational styles. Results show that children elaborate heterogeneous forms of relationship to knowledge as soon as they enter school. Our analyses allow us to establish the existence of coherence between parental educational style and the figures in the relationship to knowledge, as elaborated by the young children-students. It appears that while the influence from family environment is crucial, it is not exclusive if we consider the dialectic action of various environments on the one hand, and the singular domestication activity of the subject as a self-developing actor, on the other hand. From this point of view, interactions with teachers may be meaningful to school activities, enrich the school experience and encourage students' relationship to knowledge.

Multi-speed European Union is a very up-to-date topic especially in terms of the finance and debt crisis, which deepened the differences between member states' economies. Multi-speed integration is one of the ways how to satisfy the claims of all member states, respect their different socioeconomic conditions and interests and at the same time not to disturb the integration process. The objective of this thesis is to introduce the concept of multi-speed integration from different theoretical points of view, to outline its historical development and assess its positive and negative impacts on the EU as a whole and on Slovakia. The analysis of impacts of the Economic and Monetary Union's multi-speed character on Slovakia is the key part of this thesis. These impacts on Slovakia are both positive and negative, but some of them cannot be categorized in general. In the aggregate the positive impacts prevail.