Em um ambiente de computação em nuvem, as empresas têm a capacidade de alocar recursos de acordo com a demanda. No entanto, há um atraso que pode levar alguns minutos entre o pedido de um novo recurso e o mesmo estar pronto para uso. Por esse motivo, as técnicas reativas, que solicitam um novo recurso apenas quando o sistema atinge um determinado limiar de carga, não são adequadas para o processo de alocação de recursos. Para resolver esse problema, é necessário prever as requisições que chegam ao sistema, no próximo período de tempo, para alocar os recursos necessários antes que o sistema fique sobrecarregado. Existem vários modelos de previsão de séries temporais para calcular as previsões de carga de trabalho com base no histórico de dados de monitoramento. No entanto, é difícil saber qual é o melhor modelo de previsão a ser utilizado em cada caso. A tarefa se torna ainda mais complicada quando o usuário não tem muitos dados históricos a serem analisados. A maioria dos trabalhos relacionados, considera apenas modelos de previsão isolados para avaliar os resultados. Outros trabalhos propõem uma abordagem que seleciona modelos de previsão adequados para um determinado contexto. Mas, neste caso, é necessário ter uma quantidade significativa de dados para treinar o classificador. Além disso, a melhor solução pode não ser um modelo específico, mas sim uma combinação de modelos. Neste trabalho propomos um método de previsão adaptativo, usando técnicas de otimização multiobjetivo, para combinar modelos de previsão de séries temporais. O nosso método não requer uma fase prévia de treinamento, uma vez que se adapta constantemente a medida em que os dados chegam ao sistema. Para avaliar a nossa proposta usamos quatro logs extraídos de servidores reais. Os resultados mostram que a nossa proposta frequentemente converge para o melhor resultado, e é suficientemente genérica para se adaptar a diferentes tipos de séries temporais. / In a cloud computing environment, companies have the ability to allocate resources according to demand. However, there is a delay that may take minutes between the request for a new resource and it is ready for using. The reactive techniques, which request a new resource only when the system reaches a certain load threshold, are not suitable for the resource allocation process. To address this problem, it is necessary to predict requests that arrive at the system in the next period of time to allocate the necessary resources, before the system becomes overloaded. There are several time-series forecasting models to calculate the workload predictions based on history of monitoring data. However, it is difficult to know which is the best time series forecasting model to be used in each case. The work becomes even more complicated when the user does not have much historical data to be analyzed. Most related work considers only single methods to evaluate the results of the forecast. Other work propose an approach that selects suitable forecasting methods for a given context. But in this case, it is necessary to have a significant amount of data to train the classifier. Moreover, the best solution may not be a specific model, but rather a combination of models. In this work we propose an adaptive prediction method using multi-objective optimization techniques to combine time-series forecasting models. Our method does not require a previous phase of training, because it constantly adapts the extent to which the data is coming. To evaluate our proposal we use four logs extracted from real servers. The results show that our proposal often brings the best result, and is generic enough to adapt to various types of time series.

Nos projetos hidráulicos de irrigação são contabilizadas as perdas de carga totais, que seriam as perdas contínuas ou principais e as localizadas, objetivando maximizar a uniformidade de distribuição de água, caracterizando um conjunto motobomba adequado ao sistema de irrigação e com isso, minimizando os custos anuais e de implantação do projeto. Com o uso da informática, problemas de cálculos complexos são resolvidos com muita facilidade; desta forma pode-se aplicar modelos mais complexo para calculo da perda de carga nos sistemas de irrigação, resultando em valores mais próximos da realidade, com maiores riquezas de detalhes. A perda de carga representa a dissipação de energia da água em forma de calor, ao longo da tubulação, decorrente da resistência ao escoamento oferecida pela viscosidade do fluido e pela inércia das partículas. É variável de acordo com o tamanho das rugosidades da parede do tubo, diâmetro da tubulação e com a velocidade da água. A indústria de plásticos e seus derivados, com o auxilio da engenharia, tem aprimorado a qualidade dos materiais destinados à fabricação dos tubos, principalmente de polietileno. A utilização de tubos fabricados de matérias plásticos, de menor custo, destinados à irrigação tem aumentado nos últimos anos. A flexibilidade desses tubos traz como consequência o aumento do diâmetro interno com o aumento da pressão, fato este já observado em pesquisa e que não são levados em consideração pelos equacionamentos matemáticos utilizados para determinação da perda de carga. O presente trabalho propõe um modelo onde leva em consideração o módulo de elasticidade (E) do tubo para determinar a alteração do diâmetro em tubos elásticos provocada pela pressão, afetando assim a determinação da perda de carga contínua. Conhecer detalhadamente a causa da perda de energia, com intuito de cada vez mais otimizar a energia gasta por área irrigada no cenário brasileiro, passa a ser de fundamental importância. O Modelo Elástico proposto associado à Equação Universal, apresentou índice de desempenho médio de 0,9 sendo considerado com uma estimativa muito boa da realidade. / Total head losses are accounted in the irrigation hydraulic projects, that would be the continuous losses and the local head losses, aiming to maximize the uniformity of water distribution, characterizing an adequate pump set to the irrigation system e thus, minimizing the project implantation and annual costs. With informatics support, complex calculation problems are solved with ease, therefore it is possible to apply more complex models for head loss calculation in the irrigation system, resulting in values closer to the reality, with greater details. The head loss represents the water energy dissipation as heat, along the piping, due to the resistance to the flow offered by the fluid viscosity and by the particles inertia. It is variable according to the size of the rugosities of the pipe wall, piping diameter and the water velocity. plastic industry and its derivates, with engineering support, have improved the quality of the materials for the pipe manufacturing, mainly polyethylene. The usage of plastic material pipes for irrigation, of lowest cost, has risen in the latest years. The flexibility of these pipes leads to the internal diameter increase with pressure increase, fact already observed in research and that are not taken into account by mathematics equating used to determine the head loss. This paper proposes a model where it takes into account the elastic module (E) of the pipe to determine the diameter alteration in elastic pipes due to the pressure, affecting the determination of continuous head loss. Elastic Module proposed associated to Universal Equation, showed average performance rate of 0,9% being considered a extremely good estimative of reality.

Introdução - Estudos mostram maior ocorrência de complicações cardiovasculares na população HIV/aids. Alguns estudos envolvendo animais e indivíduos saudáveis ou com outras doenças observaram benefícios no consumo de chocolate e erva mate na função endotelial e vasodilatação. Objetivo Avaliar o efeito da ingestão de chocolate e erva mate na elasticidade arterial de indivíduos com HIV/aids em terapia antirretroviral. Métodos Ensaio clínico cruzado, aleatorizado e duplo-cego, envolvendo 89 indivíduos com HIV/aids entre 19 e 59 anos, em tratamento regular com antirretrovirais por no mínimo 6 meses, e carga plasmática do HIV <500 cópias/ml. Os indivíduos receberam suplementação diária com aproximadamente 65g de chocolate amargo, 3g de erva mate ou respectivos placebos por 15 dias, com washout de igual tempo entre as intervenções. A aferição da elasticidade arterial foi realizada por análise do formato da onda de pulso com o equipamento HDI/PulseWaveTM CR-2000®. Também foram avaliados: composição corporal, glicemia, perfil lipídico, proteína C-reativa e concentração plasmática de espécies reativas ao ácido tiobarbitúrico (TBARS). As respostas entre tratamentos foram avaliadas por ANOVA e por teste t de Student pelo Stata® 11.0, considerando-se p< 0,005. Resultados A população foi composta principalmente por homens (62,9 por cento) caucasianos (46,1 por cento) com idade média de 44,6 ± 7,1 anos. O tempo médio de diagnóstico de HIV/aids foi de 13,2 ± 4,8 anos com 10,6 ± 5,1 anos de terapia antirretroviral. Não foram encontradas diferenças significantes na elasticidade arterial dos pequenos e grandes vasos após as suplementações. Conclusão Este é o primeiro estudo a avaliar o efeito da ingestão de erva mate e chocolate na elasticidade arterial de indivíduos com HIV/aids. Apesar das evidências positivas desses alimentos na saúde cardiovascular de animais e indivíduos com outras doenças, os mesmos efeitos não foram observados neste estudo. Provavelmente o tempo de suplementação, a biodisponibilidade das substâncias bioativas e o metabolismo alterado desses indivíduos interferiram nos resultados obtidos, sugerindo a necessidade de melhor investigação desses fatores / Introduction There has been an increase on cardiovascular diseases occurrence in the HIV/aids population. Some studies involving animals and healthy individuals or individuals with other pathologies have shown benefits on endothelial function and vasodilation under use of chocolate and yerba maté. Objective To evaluate the effect of chocolate and yerba maté intake on HIV/aids patient´s arterial elasticity. Methods Double-blind crossover trial including 89 HIV/aids patients, 19 to 59 years of age, on antiretroviral therapy for at least six months, and with viral load <500copies/ml. The individuals consumed daily approximately 65g of dark chocolate, 3g of yerba maté or placebo during 15 days, followed by a 15-day washout period after each intervention. Arterial elasticity was measured using the HDI/PulseWaveTM CR-2000 CardioVascular Profiling System®, which provides a pulse wave contour analysis. Body composition, glicemic index, lipid profile, C-reactive protein and thiobarbituric acid reactive substances (TBARS) were also assessed. The crossover analysis was performed using analysis of variance (ANOVA) on Stata®. The paired Students t-test was also applied. A p value <0.05 was considered significant. Results Most of the individuals were men (62.9 per cent), caucasian (46.1 per cent) aging 44.6 ± 7.1 years. The mean time of HIV/aids diagnosis was 13.2 ± 4.8 years, with 10.6 ± 5.1 years of antiretroviral therapy. There were no significant alterations on elasticity of either large or small arteries after chocolate and yerba maté intake. Conclusion This is the first research to evaluate the effect of chocolate and yerba maté intake on HIV/aids patient´s arterial elasticity. Despite of the positive evidence of these foods on cardiovascular health of animals and populations with other pathologies, the same effects were not observed in this study. Most probably the time of intervention, the bioavailability of the bioactive substances and the altered metabolism of this individuals interfered on the results, which indicates the need for further investigation

Introdução: Existe crescente interesse em identificar marcadores de risco para eventos cardiovasculares em pacientes com HIV/aids. Atualmente observa-se alteração do perfil epidemiológico desses pacientes, com diminuição da mortalidade por infecção e comorbidades e aumento por eventos cardiovasculares. A elasticidade arterial, principalmente dos pequenos vasos, tem sido investigada como alteração precoce de evento cardiovascular. Objetivo: Avaliar a relação entre elasticidade arterial e outros indicadores de risco cardiovascular como fatores demográficos e socioeconômicos, hábitos de vida, estado nutricional e marcadores inflamatórios. Métodos: Foram selecionados aleatoriamente 132 indivíduos voluntários em tratamento regular com antirretrovirais em ambulatório especializado em HIV/aids, com idade entre 19 e 59 de ambos os sexos. A elasticidade arterial dos grandes vasos (LAEI) e pequenos vasos (SAEI) foi investigada pelo equipamento HDI/ PulseWaveTM CR-2000 Cardio Vascular Profiling System®. Foram determinados colesterol total e frações, triglicérides, proteína C-reativa, fibrinogênio, medidas antropométricas e de avaliação de composição corporal, fumo, consumo de bebidas alcoólicas, uso de drogas, prática de atividade física, além de avaliação de fatores demográficos e socioeconômicos e imunológicos (carga viral, T-CD4, T-CD8). Para investigar a associação entre LAEI e SAEI e outros fatores de risco cardiovascular utilizou-se análise de regressão linear múltipla. Resultados: Em relação à elasticidade dos grandes e pequenos vasos, 71,97 por cento e 32,58 por cento , respectivamente, dos participantes foram classificados com elasticidade normal. Observou-se associação positiva entre LAEI e peso (p<0,001) e associações negativas entre LAEI e prega cutânea subescapular (p<0,001) e linfócitos T-CD4 (p<0,02). Verificou-se associação negativa de LAEI com sexo (p<0,02), mostrando que o sexo feminino está relacionado com menor elasticidade. Houve associação positiva entre SAEI e peso (p<0,001) e associações negativas entre SAEI e prega cutânea subescapular (p<0,001), idade (p<0,01) e linfócitos totais (p<0.01). Conclusão: As alterações de elasticidade arterial em pacientes HIV/aids apresentaram relação com outros fatores de risco cardiovascular. SAEI mostrou-se diminuído na maioria dos participantes, sendo uma alteração que pode identificar a disfunção endotelial antes que a doença se torne clinicamente aparente. A monitoração constante da elasticidade arterial através de método não invasivo pode se tornar uma importante ferramenta na predição e prevenção de eventos cardiovasculares em pacientes HIV/aids / Introduction: There is a growing interest in identifying markers of risk for cardiovascular events in patients with HIV / AIDS. Currently there is a change in the epidemiological profile of patients with reduced mortality from infections and comorbidities and increased cardiovascular events. The arterial elasticity, mainly of small vessels, has been investigated as early alteration of cardiovascular events. Objective: To evaluate the relationship between arterial elasticity and other cardiovascular risk factors such as demographic and socioeconomic factors, lifestyle habits, nutritional status and inflammatory markers. Methods: We randomly selected 132 individuals volunteers, ages between 19 and 59, of both sexes, regularly treated with antiretrovirals in specialized clinics on HIV / AIDS. Arterial elasticity of the large (LAEI) and small (SAEI) vessels were investigated by the equipment HDI/ PulseWaveTM CR-2000 Cardio Vascular Profiling System®. We determined total cholesterol, HDL, triglycerides, C-reactive protein, fibrinogen, and anthropometric assessment of body composition, smoking, alcohol consumption, drug use, physical activity, and evaluation of demographic, socio-economic and immunological (viral load, T-CD4, T-CD8) factors. The association between LAEI and SAEI and other cardiovascular risk factors were assessed by multiple linear regression. Results: Regarding the elasticity of large and small vessels, 71.97 per cent and 32.58 per cent , respectively, of the participants were classified as having normal elasticity. We observed a positive association between LAEI and weight (p <0.001) and negative associations between LAEI and subscapular skinfold (p <0.001) and CD4 counts (p <0.02). There was a negative association of LAEI with gender (p <0.02), showing that female gender is associated with lower elasticity. There was a positive association between SAEI and weight (p <0.001) and negative associations between SAEI and subscapular skinfold (p <0.001), age (p <0.01) and total lymphocytes (p <0.01). Conclusion: Changes in arterial elasticity in patients with HIV / AIDS correlate with other cardiovascular risk factors. SAEI was altered in most participants, a change that can identify endothelial dysfunction before the disease becomes clinically apparent. The constant monitoring of arterial elasticity through noninvasive method may become an important tool in the prediction and prevention of cardiovascular events in HIV / aids patients

A cobrança pelo uso da água é um instrumento de gestão de recursos hídricos previsto na Lei 9433/97, dentre outros objetivos, para incentivar o uso racional da água. Porém, os estudos e simulações feitos tratam a cobrança apenas como instrumento de arrecadação. Este trabalho tem o objetivo de propor preços unitários para a água com base na necessidade de redução da demanda futura na bacia do Tietê-Jacaré. Para isso, apoia-se em cenários de demanda e oferta hídricas para os anos de 2010, 2025 e 2050 elaborados por Macêdo (2005), cujas estimativas de demanda são também melhoradas neste trabalho. Para modelar a relação entre cobrança e demanda, são usados modelos econométricos adaptados de outras bacias, especialmente a do Paraíba do Sul. Tudo isso serve de base para um algoritmo de otimização, usado para propor mudanças na política de cobrança, levando ao atendimento de metas como a redução da escassez dos recursos hídricos no futuro. / Water pricing is a water resources management tool according to brazilian law 9433/97 and it serves the purpose of giving incentive to rational use of water, among others. However, studies and simulations treat pricing as a revenue generator mechanism only. This dissertation aims to propose water unit prices based on demand reduction needs in the Tietê-Jacaré basin, Brazil. In order to do it, it uses demand and supply scenarios for 2010, 2025 and 2050 developed by Macêdo (2005), whose estimates are also slightly improved here. Econometric models are used to model the relationship between pricing and demand and they are adapted from other basins, mainly the Paraíba do Sul one. All this serves as base for an optimization algorithm, which is used to propose changes in water pricing policy, leading to the attainment of water stress reduction goals in the future.

For a class of two-dimensional boundary value problems including diffusion and elasticity problems it is proved that the constants in the corresponding strengthened Cauchy-Buniakowski-Schwarz (C.B.S.) inequality in the cases of h -hierarchical and p -hierarchical finite element discretizations with triangular meshes differ by the factor 0.75. For plane linear elasticity problems and triangulations with right isosceles tri- angles formulas are presented that show the dependence of the constant in the C.B.S. inequality on the Poisson's ratio. Furthermore, numerically determined bounds of the constant in the C.B.S. inequality are given for three-dimensional elasticity problems discretized by means of tetrahedral elements. Finally, the robustness of iterative solvers for elasticity problems is discussed briefly.

Le développement de structures portantes flexibles dans le domaine naval, telles que les hélices ou les safrans, pose de nouveaux problèmes de dimensionnement. Cette thèse a pour but de développer une méthode de dimensionnement validée par des essais pour des structures portantes déformables soumises à des écoulements, éventuellement diphasiques de type cavitant. Les essais sont réalisés sur un hydrofoil de type NACA66-312(mod.), fabriqué en polyacetate, au sein du tunnel hydrodynamique de l'Institut de Recherche de l'Ecole Navale. Lors des essais, des mesures de déformations du profil portant ainsi que de niveaux vibratoires sont réalisées. Une méthode numérique couplant un code structure éléments finis (ANSYS Mechanical) avec un code fluide volumes finis (ANSYS CFX) par une méthode partitionnée, itérative, synchrone et séquentielle, laquelle est validée en terme de prédiction du déplacement et des contraintes pour des écoulements subcavitants dans un premier temps, puis pour des écoulements cavitants stables et instables. / The design of flexible lifting bodies in the naval industry, such as propelleror rudders, create some new design problems. This thesis proposes a numerical method validated by experimental comparison for solving the case of lifting bodies loaded by flow with or whitout cavitation. The tests are carried out in the hydrodynamic tunnel of the French Naval Academy Research Institute, on a polyacetate flexible hydrofoil NACA66-312 (mod.). During tests, strains and vibrations are measured for comparisons with numerical results. The numerical method uses a sequential synchrone iterative partitionned coupling betweena structural finite-element code (ANSYS Mechanical) and a finite-volume code (ANSYS CFX). Good agreement between numerical and experimental results for displacements, and stresses of the structure is highlighted. For the cavitating flow, a good agreement for the cavitation dynamic is observed and the stresses are evaluated with satisfying accuracy.

L'objectif de la thèse est d'identifier et de quantifier les paramètres régissant l'épaississement des macles dans trois métaux hexagonaux (Zr, Ti, Mg). Le mécanisme que nous étudions est le glissement de dislocations d'interfaces, i.e. les disconnections, le long des joints de macles parfaits. Nous nous intéressons alors à la germination des disconnections avant de nous concentrer sur leur migration.Une première étude en potentiel empirique permet de valider un couplage original avec la théorieélastique afin d'extraire des simulations atomiques l'énergie de cœur des disconnections. Cette méthode permet de partitionner l'énergie entre une contribution de cœur, intrinsèque à la disconnection et une partie élastique qui dépend de l'environnement de la disconnection. Cette partition faite, nous modélisons alors l'énergie de formation de dipôles de disconnections isolés, pour chacun des différents joints de macles. Cette modélisation nous permet alors de sélectionner les dipôles de disconnections les plus pertinents que nous étudions par la méthode abinitio.Nous modélisons ensuite la migration des disconnections le long des joints de macles parfaits.Pour cela, nous montrons via l'utilisation de la méthode Nudged Elastic Band, que l'énergie demigration est d'un ordre de grandeur inférieur à l'énergie de formation. Ainsi, l'énergie de formation des dipôles de disconnections apparait comme prédominant dans la croissance des macles / The aim of this thesis is to identify and quantify the parameters of importance when dealing with twin thickening in three hcp metals (Zr, Ti, Mg). The mechanism we study is the glide of twinning dislocations, i. e. the disconnection, along the perfect twin boundaries. We first focus on the nucleation of disconnection before addressing their migration. A study using an EAM potential allows us to validate an original coupling between our atomistic simulations and linear elasticity in order to extract the core energy of disconnection.We then show how this coupling permits to divide the formation energy in two terms: the core contribution, intrinsec to the disconnections, and an elastic one, which depends on the disconnection's environment. Thanks to this partition, we model the formation of isolated disconnection that may appear along the different twin planes. We select the dipoles of lowest formation energies in order to perform ab initio calculations and compare the behavior observed the three different metals. We then model the migration of disconnections along the perfect twin planes. To do so, we use the Nudged Elastic Band method, and find out that the migration energy of disconnections is one order of magnitude lower than their formation energies. We therefor conclude that the disconnection nucleation is the rate limiting factor to explain twin thickening thanks to the creation and motion of disconnection

En conception de produits, l’étape de conception dite architecturale doit aboutir à une solution décrivant les caractéristiques du produit, telles que les dimensions ou le choix de composants. Parmi les nombreuses solutions potentielles, il est nécessaire d’effectuer un choix et de pouvoir le justifier de manière rigoureuse. Ce choix doit en outre intégrer l’éventuelle présence d’une solution de référence, pouvant par exemple être issue de projets antérieurs, ou d’études préliminaires.Dans ce but, nos travaux présentent une méthode d’aide à la décision en vue de sélectionner une solution de conception ; nous la nommons méthode OIA (Observation-Interprétation-Agrégation). Cette méthode emploie deux types de modèle, l’un pour formaliser le comportement objectif du produit (Observation), l’autre pour les préférences subjectives du concepteur (Interprétation). Dans ces préférences, nous incluons le comportement attendu du produit, la satisfaction du concepteur ainsi que les compromis intrinsèquement réalisés lors du processus de conception. Ces compromis sont réalisés au travers de stratégies de conception et de logiques de pondérations (Agrégation). La méthode OIA est employée une première fois pour qualifier les solutions de conception en termes de performance. Cette méthode est ensuite appliquée une seconde fois afin de qualifier la solution par rapport à la solution de référence, en termes de confiance accordée par le concepteur. Nous introduisons la notion d’arc-élasticité en conception comme un indicateur de compromis entre performance et confiance pour une solution de conception.Plusieurs algorithmes stochastiques d’optimisation sont comparés comme méthodes de recherche de solutions candidates pertinentes. Nous les détaillons, les comparons et proposons une méthode de sélection multicritère afin d’identifier l’algorithme le plus pertinent.Notre travail est appliqué au dimensionnement d’une jonction rivetée dans un contexte aéronautique industriel. / In product design, the design phase called "embodiment design" results to define solutions describing main product characteristics, such as dimensions or standard components. Among numerous candidate solutions, it is necessary to select and to rigorously justify the selection. This choice must often take into account preexisting reference solutions, coming from previous projects or preliminary studies.In this context, our works propose a decision support method aiming to select a design solution; it is called OIA method (Observation-Interpretation-Aggregation). This approach uses two types of model, the first one concerns the objective behavior of the product (Observation), the second one concerns the designer's subjective preferences (Interpretation). In these preference several indicators are introduced: expected product behaviors, designer's satisfactions and usual compromises realized through design activity. These compromises are achieved through design strategies and weighting approaches (Aggregation). The OIA method is first used to qualify design solutions though the performance indicator. This method is then used to qualify design solutions related to the reference one, through the confidence indicator. The arc-elasticity is finally introduced as a compromise indicator between performance and confidence.Several stochastic optimization algorithms are compared to compute optimal solutions. Theses algorithms are investigated and compared using three criteria, and a multicriteria selection method is proposed to identify the most suitable one.This work is applied to the dimensioning of a riveted junction in an industrial context.

Cette thèse a permis d'étudier la perméabilité du béton sous conditions thermiques et hydriques variables, ainsi que l'effet de fissuration. Nombreux essais (mesures de saturation et perméabilité, essai de compressions uniaxiales et triaxiales et hydrostatiques) ont été menés afin d'évaluer l'influence de la température et de la saturation sur le comportement hydraulique du béton sain et microfissuré. En parallèle, un dispositif de mesure de la perméabilité sur béton macro fissuré permet d'étudier le comportement d'une macro-fissure de béton confinée et soumise à écoulement de gaz sec ou l'air très humide à différentes températures. Les essais mécaniques multiaxiaux sont couplés aux mesures de perméabilité sur béton sain et micro-fissuré par gel-dégel, qui permet d'évaluer la perméabilité sous charge déviatorique et l'effet de préfissuration sous contrainte. Nous avons également effectué un essai de perméabilité relative du béton en fonction de la saturation en eau, soumis à la dessiccation ou à la resaturation, en conditionnant par les différentes humidités relatives imposées / The main objective of this study is to evaluate the variable thermal and hydric effect, with fissuration effect on the hydraulic behaviour of two concretes. Many experimental tests (saturation and permeability measurements, uniaxial and triaxial compressions tests) were carried out in order to investigate the temperature and saturation influence on the behaviour hydraulic on sound and micro-cracked concrete. Moreover, an experimental device for permeability measurement on macro-cracked concrete was realized, it allows to study the behaviour of macro-cracked of concrete confined and subjected to dry gas flow or very moist air at different temperatures. Multiaxial mechanical tests are coupled to the permeability measurements of sound concrete and micro-cracked by freezing and thawing, which allow to measuring the permeability under deviatoric load-unload with the effect of pre-cracking under stress. We also effectuated a test of relative permeability of concrete as a function of water saturation, subjected to drying and resaturation, conditioning by the different relative humidity imposed