En gestion, les recherches sur les comportements de la Génération Y au travail sont décriées. Pourtant, les questions de la cohabitation et du renouvellement générationnel font l’objet de nombreux écrits dans la presse. Si la recherche d’une identité Y en tant qu’entité circonscrite semble infructueuse, l’étude de la socialisation organisationnelle d’une cohorte basée sur l’entrée organisationnelle à un âge similaire permet de saisir le sens du phénomène. De plus, dans un contexte d’attraction et de fidélisation des meilleurs jeunes diplômés à potentiel, les grandes entreprises mettent progressivement en place des graduate programmes. L’étude longitudinale qualitative réalisée en CIFRE chez TRANSLOG combine plusieurs méthodes de recherche, permettant d’enrichir la littérature académique à deux niveaux. Au plan individuel, l’analyse de 60 entretiens longitudinaux menés auprès de 17 pépinières révèle le déroulement de la socialisation des gradués pendant 24 mois, dans le cadre de diverses transitions de rôle. Au plan organisationnel, les pratiques et tactiques organisationnelles de socialisation mises en œuvre par l’entreprise et les agents socialisateurs sont exposées, de même que les atouts et dysfonctionnements des pratiques utilisées. Une lecture du phénomène « Génération Y » est proposée : cohorte organisationnelle (dans l’entreprise) et cohorte sociétale (dans et hors de l’entreprise) sont deux regards complémentaires portés sur l’identité générationnelle au travail, à lire de façon duale pour en saisir tous les mécanismes. Des préconisations managériales et organisationnelles sont suggérées pour TRANSLOG et pour les organisations rencontrant des enjeux similaires. / In management, the research on the Generation Y’s behaviors at work is criticized. Yet the questions of cohabitation and generational renewal are the subject of numerous writings in the press. If the search for a Y identity as a circumscribed entity seems unsuccessful, the study of the organizational socialization of a cohort based on organizational input at a similar age seems relevant to understand the meaning of the phenomenon. Moreover, in a context of attraction and retention of the best young graduates with potential, big corporations progressively design graduate programs. The qualitative longitudinal study carried out within the TRANSLOG company combines several research methods, enabling the enrichment of the academic literature at two levels. At the individual level, the analysis of 60 longitudinal interviews with 17 trainees revealed the process of socialization of these graduates over 24 months in various role transitions. At the organizational level, the organizational practices and tactics of socialization implemented by the company and the socializing agents are exposed, as well as the strengths and dysfunctions of the practices used. A reading of the “Generation Y” phenomenon is proposed. Our results show that the organizational cohort (in the company) and the societal cohort (inside and outside the company) are two complementary views focused on generational identity, which have to be read in a dual way in order to grasp its mechanisms. Managerial and organizational recommendations are suggested for TRANSLOG and for organizations with similar issues.

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CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / INCT - Instituto Nacional de Ciência e Tecnologia / O Monitoramento da Integridade Estrutural baseado na técnica da Impedância Eletromecânica permite a detecção de alterações em estruturas, possibilitando a identificação e o reparo de danos. A técnica baseia-se em obter assinaturas de impedância da estrutura monitorada, em diversos momentos da operação da mesma. Possíveis danos são identificados pela comparação matemática entre as assinaturas obtidas. Sendo uma técnica bastante precisa, variações na temperatura e efeitos externos como vibrações e campos eletromagnéticos atuantes sobre a estrutura monitorada representam perturbações que tendem a gerar erros no processo de monitoramento. Para tornar o processo de diagnóstico mais robusto, torna-se necessário dissociar os verdadeiros efeitos de alteração estrutural daqueles que são considerados interferências externas. O presente trabalho tem por objetivo mostrar um estudo de caso, usando um painel aeronáutico de alumínio como corpo de prova, em que a influência dos fatores não previstos na técnica da impedância é identificada e caracterizada por meio de modelos estatísticos. Para realizar estas análises, foram executados experimentos utilizando transdutores piezelétricos acoplados ao referido painel. Os experimentos submeteram o painel à variação de temperatura e à inclusão de danos simulados. A partir dos dados de assinatura de impedância obtidos, comprovou-se a eficiência dos modelos estatísticos elaborados, sendo possível tanto separar e identificar a influência do dano simulado e da temperatura quanto estabelecer um intervalo de confiança nas análises desenvolvidas. Com esses resultados, é possível indicar que a técnica de análise estatística proposta torna-se uma útil ferramenta de pré-processamento de dados em aplicações de monitoramento de estruturas baseados no método da impedância eletromecânica. / Structural Integrity Monitoring based on the Electromechanical Impedance technique allows the detection of changes in structures, allowing the identification and repair of damages. The technique relies on obtaining impedance signatures from the monitored structure, at various moments of its operation. Possible damages are identified by the mathematical comparison between the signatures obtained. As a very precise technique, variations in temperature and external effects such as vibrations and electromagnetic fields acting on the monitored structure represent perturbations that tend to generate errors in the monitoring process. To make the diagnostic process more robust, it becomes necessary to decouple the true structural alteration effects from those that are considered external interferences. The present work aims to show a case study using an aluminum aeronautical panel as a test body, in which the influence of factors not predicted in the impedance technique is identified and characterized by means of statistical models. To perform these analyzes, experiments were performed using piezoelectric transducers coupled to said panel. The experiments subjected the panel to temperature variation and to the inclusion of simulated damages. From the impedance signature data obtained, the efficiency of the elaborated statistical models was verified, being possible to separate and identify the influence of the simulated damage and the temperature, as well as to establish a confidence interval in the developed analyzes. With these results, it is possible to indicate that the proposed statistical analysis technique becomes a useful tool for data preprocessing in structural monitoring applications based on the electromechanical impedance method. / Dissertação (Mestrado)