Este trabalho trata da avaliação do desempenho de máquinas de usinagem cujas arquiteturas se baseiem em estruturas cinemáticas paralelas planas. Inicialmente analisa dois tipos distintos de arquiteturas paralelas, avaliando as suas mobilidades, possíveis formas de atuação, além de apresentar seus modelos teóricos cinemáticos e dinâmicos correspondentes. A seguir, descrevem-se no texto algumas simulações realizadas em oito modelos propostos, de modo a se observar os comportamentos das arquiteturas consideradas, quando da execução de possíveis trajetórias da ferramenta em movimento plano (2D). A seleção dos modelos e a discussão dos resultados são guiadas por índices de desempenho presentes na literatura e outros propostos ou adaptados. O trabalho discute ainda as melhores soluções, com foco nas trajetórias prédefinidas e em critérios importantes para os mecanismos de arquitetura paralela. / This dissertation concerns the performance evaluation of machine-tool with architectures based on planar parallel kinematic structures. The text starts analyzing two distinct types of parallel architectures, their mobility, feasible schemes of actuation and presents their kinematic and dynamic models. From this point, simulations are described to figure out some characteristics of chosen architectures, in eight different models, focused on execution of tool trajectories in plane motion (2D). The model selection and the discussion about obtained results are guided by performance indexes from the literature and others either proposed or adapted. The work also discusses the best solutions, for pre-defined tool trajectories and important points for mechanisms with parallel structures.

The use of Native Advertising has sparked ethical concerns, due to its controversial nature inherent in its definition - a paid form of advertising that disguises persuasive communications as the editorial content of the publishing media outlet. The growing popularity of Native Advertising practices over the past decade in online news publishing has contributed towards the increasingly blurred lines between commercial and editorial content which in turn engenders feelings of deception in consumers and threatens to lower the trustworthiness of news publishers as an objective source. Therefore, the purpose of this study was to undertake theory testing guided by the tenets of the Persuasion Knowledge Model [PKM] (Friestad & Wright, 1994) to uncover insights on whether disclosure serves as an effective measure in publishers' efforts of mitigating the potential of consumer deception. In particular, this study investigated the relationships between: (1) effect of disclosure label positioning on advertising recognition; (2) mediating influence of visual attention on the aforementioned relationship; and (3) effect of advertising recognition on Inference of Manipulation [IMI] and perceptions of the online news publishers' credibility. The study used a quantitative multi-methodology research approach. An innovative Neuromarketing approach was undertaken through a psychophysiological-based analysis of visual attention to disclosure, measured as Fixation (ms/m) using eye-tracking technology, in addition to self-reported measures obtained via an online survey. In line with similar past studies, this study used convenience non-probability sampling and random assignment of participants to experimental groups, on a sample of 87 students between the ages of 20-29 years from the University of Cape Town (UCT). Findings showed no significant difference in the likelihood of advertising recognition, neither between the groups presented with a disclosure and those not, nor between the varying positions of disclosure. Additionally, advertising recognition had a positive influence on perceptions of credibility, contrary to theory and evidence from past studies (described in the Literature Review). Thus, it was concluded that disclosure and advertising recognition are necessary antecedents for critical processing and formation of judgement, but by themselves are not sufficient for perceived transparency and subsequent evaluations of the publisher's credibility. This study presents design implications for practitioners in the online news publishing industry and marketers: the perceived utility of the sponsored content, along with sponsorship transparency through disclosure, plays an important role in minimizing the negative influence of advertising recognition on perceived credibility.

The aim of using parallel kinematic motion systems as an alternative of conventional machine tools for precision machining has raised the demands made on the accuracy of identification of the geometric parameters that are necessary for the kinematic transformation of the motion variables. The accuracy of a parallel manipulator is not only dependent upon an accurate control of its actuators but also upon a good knowledge of its geometrical characteristics. As the platform's controller determines the length of the actuators according to the nominal model, the resulted pose of the platform is inaccurate. One way to enhance platform accuracy is by kinematic calibration, a process by which the actual kinematic parameters are identified and then implemented to modify the kinematic model used by the controller. The first and most general valuation criterion for the actual calibration approaches is the relative improvement of the motion accuracy, eclipsing the other aspects to pay for it. The calibration outlay has been underestimated or even neglected for a long time. The scientific value of the calibration procedure is not only in direct proportion to the achieved accuracy, but also to the calibration effort. These demands become particularly stringent in case of the calibration of hexapods of the so-called simple design. The objectives of the here proposed new calibration procedure are based on the deficits mentioned above under the special requirements due to the circumstances of the simple design-concept. The main goals of the procedure can be summarized in obtaining the basics for an automated kinematic calibration procedure which works efficiently, quickly, effectively and possibly low-cost, all-in-one economically applied to the parallel kinematic machines. The problem will be approached systematically and taking step by step the necessary conclu-sions and measurements through: Systematical analysis of the workspace to determine the optimal measuring procedure, measurements with automated data acquisition and evaluation, simulated measurements based on the kinematic model of the structure and identifying the kinematic parameters using efficient optimization algorithms. The presented calibration has been successfully implemented and tested on the hexapod of simple design `Felix' available at the IWM, TU Dresden. The obtained results encourage the application of the procedure to other hexapod structures.

La crise du disque se manifeste par une baisse conséquente du revenu des artistes. C’est pourquoi, les concerts apparaissent comme une source de revenu importante. Dans ce contexte, le placement de produits durant les concerts est une pratique qui tend à se développer. Ces constats nous ont conduit à formuler la problématique de recherche suivante : quelles sont les opportunités de placement de produits dans les concerts de musique (technique où le public n’a pas forcément conscience de la tentative de persuasion) et quel est l’impact du placement de produits sur l'image de marque ?La revue de la littérature présente trois processus de persuasion expliquant l’efficacité du placement : le concept de congruence entre l’artiste et la marque (Russell, 1998), l’intéressement perçu de l’artiste (Friestad et Wright, 1994) et l’endossement de personnalité (Mac Cracken, 1989). De plus, le cadre théorique de la servuction (Eglier et Langeard, 1987) a permis de mettre en lumière l’importance des interactions entre le personnel en contact et le consommateur. Il nous a permis de proposer une typologie du placement de produits (selon le niveau de participation de l’artiste et du public).La méthodologie de la recherche se décline en trois phases. La première phase est de nature qualitative par le biais d’entretiens semi-directifs. Ces entretiens menés auprès d’artistes de renoms, d’organisateurs de concerts et de responsables d’agences de communication ont permis d’analyser les pratiques de placement de produits d’une part et d’évaluer les motivations et les freins des professionnels vis-à-vis de cette technique d’autre part. La deuxième phase est de nature quantitative. L’efficacité de quatre techniques de placement sur l’image de marque a été comparée au moyen d’une expérimentation. Quatre concerts ont été organisés dans des conditions aussi proches que possibles de la réalité. Les résultats démontrent la supériorité du placement interactif (forte participation de l’artiste et du public au placement) en termes d’image de marque. Enfin, la troisième phase a consisté en une étude quantitative ad hoc durant un concert d’un groupe à forte notoriété utilisant la technique du placement interactif. Les résultats confirment l’influence du placement produits sur l’image de marque.En synthèse, cette thèse décrit les opportunités offertes par les concerts de musiques en termes de placement de produits. Le dispositif méthodologique permet d’évaluer l’efficacité de quatre techniques de placement sur l’image de marque et démontre l’intérêt du placement interactif. Enfin, elle contribue à mettre en lumière le rôle de l’attitude vis-à-vis de l’artiste et de la congruence entre la marque et l’artiste. Les limites de ce travail et les nombreuses voies de recherches offertes par ce champ encore peu étudié sont présentées en conclusion. / Product placement is becoming an increasingly significant communication tool in cultural products. Product placement is traditionally studied in the field of films, but music concerts are also an attractive medium. Indeed, the crisis of the music industry leads the artists to find another way to other sources of financing. Our research takes into account the influence of this technique in connection with congruence, personality endorsement and how the audience copes when they recognize the persuasion attempt. Moreover, we considered the effect of product placement on brand image, because it is one of the most important goals according to the firms which want to use the technique of product placement. We aim to better understand the ins and outs of product placements in music concerts thanks to three studies. The first one is qualitative. We interviewed various artists, companies which deal with product placement, concert music producers and a legwoman. The second one is quantitative, and compares 4 types of product placements thanks to an in situ study. The last one is also quantitative and is linked with the previous study. It aims to focus on interactive product placement in which the interaction between the artist and the audience becomes the medium for new forms of product placement. We are not able to demonstrate significant results of interactive product placement on brand image but there is a trend showing that interactive product placement leads to a better brand image compared with the other kinds of placements. Subsequently, we underline the complex role of congruence. Moreover when the audience identifies the persuasion attempt, it does not influence negatively the brand image contrary to what the Persuasion Knowledge Model indicates. In return, product placement efficiency on brand image is linked with endorsement. Indeed the attitude towards the artist has a positive influence on brand image. The research concerning product placements in music concerts is still in its early stages but this kind of sponsorship offers promising opportunities for brands and artists alike.

The diploma thesis describes performance in the area of air transport, based on performance of national economies of two selected neighbouring countries, Czech Republic and Germany, through comparison of their gross domestic product in the selected time period. The operating performance is focused mainly on transportation performance of air transport. First part of the thesis is dealing with interconnection of economy with air transportation. Crucial part of the work contains analysis of development of GDP and analysis of development of transportation performance of both countries. Part of the thesis is also acquisition of passenger-kilometre data derived from fuel consumption and produced emissions of CO2.

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