The aim of this diploma thesis is to provide a comprehensive overview of conditions for establishing a company in the European Union. This work defines basic business terms and discusses the historical development of the business environment and conditions for establishing a company in the territory of today's European Union. Surveys the legal forms of businesses and analyzes the procedure of founding a company in Czech Republic, in selected EU member states and in the European Union. It deals with taxes and the impact of the tax policy on the establishment of companies. The work identifies and evaluates the criteria which determine conditions for starting up a business and their development in time. It compares the results of the EU member states and based on the analyzed data helps to decide whether it is better and for what kind of a company to establish a company in Czech Republic or in another country in EU.

Magister Public Health - MPH / Introduction The Human Resource Strategic Plan of the Ethiopian Ministry of Health lists current health workforce problems as a high attrition rate among public service physicians, poor human resource management, non-conducive working conditions and high workloads. In Addis Ababa's public hospitals, the turnover of physicians is high and - as repeatedly and informally reported by hospital managers - the presence of the contributory factors listed above are also anecdotally thought to be present. These factors present a serious challenge to the delivery of high quality health care services and their presence indicates that the job satisfaction of physicians is likely to be low. However, factors responsible for job dissatisfaction among physicians and their implications for staff turnover have not been studied or documented in the context of Ethiopia's health system. It was this scenario that motivated the researcher to conduct this study in order to assist policy makers in taking appropriate actions, if and as required. Aim: The aim of the study was to assess the level of job satisfaction, the factors influencing job satisfaction and the consequences of job satisfaction among physicians in public hospitals in Addis Ababa, Ethiopia. Objectives: • To describe the job satisfaction levels of physicians in public hospitals in Addis Ababa, Ethiopia • To identify factors affecting the job satisfaction levels of physicians • To assess possible consequences linked to physicians' job satisfaction levels. A self-administered questionnaire was used to measure job satisfaction, composed of 65 individual variables grouped within 13 dimensions and adapted to the Ethiopian context from the Job Descriptive Index and the Minnesota Satisfaction Questionnaire. An additional questionnaire was used to assess socio-demographic variables and the possible consequences of low job satisfaction. Analysis: A composite job satisfaction score was obtained by summing the individual answers for each of the variables to assess overall job satisfaction. Bivariate analysis was undertaken, using 2X2 tables (with 95% confidence intervals) to calculate the prevalence ratio for each of the potential causes and consequences of low job satisfaction, using the composite score cut-off levels of job satisfaction. Multivariate analysis was undertaken to obtain the adjusted prevalence odds ratios for both the potential causes and consequences of low job satisfaction, using multiple logistic regression analysis.

Conselho Nacional de Desenvolvimento Científico e Tecnológico / The basic concept of impedance-based structure health monitoring is measuring the variation of the electromechanical impedance of the structure as caused by the presence of damage by using patches of piezoelectric material bonded on the surface of the structure (or embedded into). The measured electrical impedance of the PZT patch is directly related to the mechanical impedance of the structure. That is why the presence of damage can be detected by monitoring the variation of the impedance signal. In order to quantify damage, a metric is specially defined, which allows to assign a characteristic scalar value to the fault. This study initially evaluates the influence of environmental conditions in the impedance measurement, such as temperature, magnetic fields and ionic environment. The results show that the magnetic field does not influence the impedance measurement and that the ionic environment influences the results. However, when the sensor is shielded, the effect of the ionic environment is significantly reduced. The influence of the sensor geometry has also been studied. It has been established that the shape of the PZT patch (rectangular or circular) has no influence on the impedance measurement. However, the position of the sensor is an important issue to correctly detect damage. This work presents the development of a low-cost portable system for impedance measuring to automatically measure and store data from 16 PZT patches, without human intervention. One fundamental aspect in the context of this work is to characterize the damage type from the various impedance signals collected. In this sense, the techniques of artificial intelligence known as neural networks and fuzzy cluster analysis were tested for classifying damage of aircraft structures, obtaining satisfactory results. One last contribution of the present work is the study of the performance of the electromechanical impedance-based structural health monitoring technique to detect damage in structures under dynamic loading. Encouraging results were obtained for this aim. / O conceito básico da técnica de integridade estrutural baseada na impedância tem a ver com o monitoramento da variação da impedância eletromecânica da estrutura, causada pela presença alterações estruturais, através de pastilhas de material piezelétrico coladas na superfície da estrutura ou nela incorporadas. A impedância medida se relaciona com a impedância mecânica da estrutura. A partir da variação dos sinais de impedância pode-se concluir pela existência ou não de uma falha. Para quantificar esta falha, métricas de dano são especialmente definidas, permitindo atribuir-lhe um valor escalar característico. Este trabalho pretende inicialmente avaliar a influência de algumas condições ambientais, tais como os campos magnéticos e os meios iônicos na medição de impedância. Os resultados obtidos mostram que os campos magnéticos não tem influência na medição de impedância e que os meios iônicos influenciam os resultados; entretanto, ao blindar o sensor, este efeito se reduz consideravelmente. Também foi estudada a influencia da geometria, ou seja, do formato do PZT e da posição do sensor com respeito ao dano. Verificou-se que o formato do PZT não tem nenhuma influência na medição e que a posição do sensor é importante para detectar corretamente o dano. Neste trabalho se apresenta o desenvolvimento de um sistema de medição de impedância de baixo custo e portátil que tem a capacidade de medir e armazenar a medição de 16 PZTs sem a necessidade de intervenção humana. Um aspecto de fundamental importância no contexto deste trabalho é a caracterização do dano a partir dos sinais de impedância coletados. Neste sentido, as técnicas de inteligência artificial conhecidas como redes neurais e análises de cluster fuzzy, foram testadas para classificar danos em estruturas aeronáuticas, obtendo resultados satisfatórios para esta tarefa. Uma última contribuição deste trabalho é o estudo do comportamento da técnica de monitoramento de integridade estrutural baseado na impedância eletromecânica na detecção de danos em estruturas submetidas a carregamento dinâmico. Os resultados obtidos mostram que a técnica funciona adequadamente nestes casos. / Doutor em Engenharia Mecânica