Care of the intangible cultural heritage is nowadays dependent on several elements. The main element is people and community in the places where the habit or tradition is still kept. But their effort must be supported by national and international authorities who invest considerable resources into their preservation. Except this also the general awareness of public that is a guarantee of passing the tradition to the next generations is very important. On the example of the Ride of Kings there is captured historical evolution of the tradition, which during the previous century undergo the change in the people's celebrations. By their formation was conditioned preservation of tradition, which began to vanish in the second half of the 20th century. Key words Intangible cultural heritage, cultural people's tradition, Ride of the Kings, folklore.

The thesis "The Second Roman Ride of the Charles the Fourth" tries to cover the whole campaign of the Emperor Charles IV. between years 1368 and 1369. Also, thesis follows the basic questions related to the issues of the royal court during the journey. The first of those questions is about accompaniment of the Emperor Charles IV. on his journey across the Italian territory and how the court was transformed during the ride to Rome and back. The second question points out the effort to build the court of the Elizabeth of Pomerania, who was crucial person of the second Roman ride where she did not travel alongside the emperor. The last question attempts to describe the undergirding of the court during the campaign in italian cities - how the emperor and his court was accepted and welcomed, accommodated, supllied and gifted.

Digital platform organizations challenges the organizational landscape by utilizing technology enabling cost efficient transactions. Uber is a commonly known example of such an organization, where tensions have arisen in various local contexts due to that the organization draw their boundary tightly around the platform to the benefit of organizational efficiency. Uber has as a consequence, been highly questioned in its liability of their primary operations: Is it a technology platform, or a transportation firm?   This thesis sets out to answer:  How is the organizational boundary of Uber challenged in various local contexts? The purpose is to provide an explanation towards how the organizational boundary of a digital platform organization could be understood in relation to local context, and how it can or cannot evolve in regards to these contexts. The results show that context matters for the boundary of Uber. In addition, a pattern amongst the context specific events emerged influencing the boundary. These can be categorized into four configurations: Adjusting, Expanding, Withdrawing and Intertwining. Each of the configurations explain the underlying reasons for the varying fluctuations the boundary of Uber show, and thus answer how the organizational boundary of Uber is challenged in various local contexts.

L'étude de l'écoulement à l'aval d'une ride a un intérêt primordial dans la dynamique et l'évolution des rivières, des milieux côtiers ou des estuaires. Une des questions au coeur de ces écoulements est liée aux mécanismes d'interaction entre les particules et l'écoulement. Cette interaction donne souvent lieu à la formation de structures ondulées (rides ou dunes). Ce couplage est engendré au niveau de l'écoulement moyen, de la forme de la dune mais aussi au niveau de la macro turbulence et des structures tourbillonnaires instationnaires générées par la présence même des formes sédimentaires. L'identification des différents mécanismes et processus hydrodynamiques générés par la présence de dunes ou rides est exposée en détail par l'examen de l'écoulement laminaire à l'aval d'une ride fixe et isolée. Des techniques de mesure optiques 2D (PIV, visualisations) et 3D (Stéréo-PIV, tomographie laser) couplées à une étude numérique avec un code industriel, permettent de mettre en évidence l'instationarité, la tridimensionnalité de l'écoulement ainsi que la dynamique tourbillonnaire de la zone de recirculation à l'aval de la ride. L'impact de l'écoulement turbulent sur la naissance de dunes isolées est analysé au moyen d'une étude détaillée sur le transport de particules à partir d'essais menés en canal hydro-sédimentaire. Le rôle particulier de la zone de recirculation à l'aval de la dune est mis en évidence à l'aide d'un suivi spatio-temporel du transport des particules entre sa crête et sa face d'avalanche. Finalement, l'analyse et l'influence des conditions hydrauliques sur le seuil critique de mise en mouvement d'un lit de particules ainsi que la formation et la migration d / The aim of this study is to examine the processes leading to development a bed river, estuary or coastal environments morphology. The ability to investigate the complex nature of the interaction between fluids and sediments mechanisms and its role in bed transport and river stability is important to understand river evolution. Dunes or ripples are in frequent interaction with the bed. Hence, the topology of dune is related to the macroturbulence of the flow, mean flow field and the instantaneous structures of the vortices generated by these forms. Details of different mechanisms and hydrodynamic process generated behind a fixed single ripple are exposed by examining a laminar flow over the dune itself. Measurements with two-component Particle Image Velocimetry, three-component Stereo-PIV and flow visualization coupled with a numerical studies are performed to acquire and to obtain a detailed knowledge of the flow over the dune concerning the three-dimensionality, the instantaneous behavior of the flow and the large dynamic of vortex in the recirculation zone along the ripple. A set experiment generating turbulent flow is conducted in a hydro-sedimentary channel to detail the quantitative measurement of bedload transport processes in order to determine the effects of the turbulent flow on dune creation. A spatio-temporal monitoring of particles transport from crest to dune slip face is conducted to point the particular role of the recirculation region. Finally, the analyze and the effect of hydraulics conditions on the critical shear stresses for incipient particle motion as well as the formation and the migration of the mobile dune are emphasized by a geomorphological st

This dissertation excavates the work of early special effects cinematographer Norman O. Dawn in order to explore film spectatorship, the ephemerality of the cinematic image, and motion picture preservation and archival practices. Best known for his innovations of glass and matte shot techniques, Dawn produced 861 composite images while working in the U.S. film industry between 1906 and 1954. Although technological film historians acknowledge the importance of Dawn’s innovations to the development of motion picture special effects, the composite images themselves as well as the films for which they were produced remain in relative obscurity. Rather than attempting to recover these objects for inclusion in an existing film canon, my research interrogates their obscurity by analyzing Dawn’s special effects processes against the broader economic concerns that inform the dominant practices of the US film industry during the first half of the twentieth-century. My research begins with the Norman O. Dawn collection housed at the Harry Ransom Humanities Research Center, which is the most comprehensive historical record of Dawn’s work in the film industry. Constructed by Dawn himself between 1962 and 1974, this collection consists of 164 poster-sized collages of archival ephemera that illustrate the special effects processes employed in the production of 235 composite images for eighty-five films. While these eighty-five film titles constitute a tentative corpus upon which to base my research, seventy of these films are lost, which raises questions concerning the relationship between motion picture preservation and film history, specifically why these films have not been preserved while others have and to what extent the economic imperatives of the film industry have determined these conditions. I address these questions in my analysis of archival material related to these films, finding that they traverse several distinct domains of film practice—including early scenic footage for newsreels and the amusement park ride Hale’s Tours of the World, early one-reel travel films, silent-era studio shorts, serials, and B features, and poverty row and independently-produced silent and sound feature-length films—thereby situating Dawn’s special effects at the intersection of the early and contemporary cinematic modes often aligned in studies of cinematic special effects. I argue that this heterogeneous corpus points to a studio-era Hollywood cinema alternative to the classical model, largely forgotten because it is dominated by low-budget product intended to supplement more costly feature films. In contrast to the classical model, this alternate cinematic mode emphasizes the scenic and thrilling elements that characterize both early exhibitionist films and contemporary effects-driven blockbusters. In this context, Dawn’s special effects processes constitute a historically marginalized practice precisely because they are non-routine techniques that provide cost-effective means to produce otherwise economically infeasible scenes, and, as such, operate on the periphery of conventional film production.

La géothermie est considérée comme une source d'énergie propre et inépuisable à échelle humaine. Actuellement, le rendement des centrales géothermiques est limité à l'exploitation de fluides de températures inférieures à 350 °C. L'association de l'activité tectonique et volcanique aux dorsales océaniques fait de l'Islande un lieu où l'extraction de fluides supercritiques (T> 375 °C) peut être envisagée. Cette exploitation pourrait multiplier par dix la puissance électrique délivrée par le système géothermal. Ces fluides peuvent-ils circuler dans la croûte océanique ? Ce travail propose de contraindre les observations géophysiques et de prédire le fonctionnement des réservoirs géo-hydrothermaux de très haute température par l'étude des propriétés physiques des basaltes. La première approche est focalisée sur l'étude de roches ayant accueilli une circulation hydrothermale par le passé. L'étude de ces roches au site ODP 1256, montre que leur porosité est associée à la présence de minéraux d'altération hydrothermale du facies amphibolite (T> 500 °C). La seconde approche a consisté à recréer, en laboratoire, les conditions des systèmes hydrothermaux, à très haute température, afin de prédire les propriétés mécaniques et électriques des basaltes dans ces conditions. Les résultats mécaniques indiquent que la transition fragile/ductile, souvent associée à une forte décroissance de perméabilité, intervient à une température d'environ 550 °C. La mise en place d'une cellule de mesure de la conductivité électrique de haute température a fourni les premiers résultats utiles à l'analyse des données géophysiques. Appliqués aux conditions de la croûte basaltique Islandaise, ces résultats indiquent que des fluides hydrothermaux pourraient circuler au moins transitoirement à l'état supercritique jusqu'à ~ 5 km de profondeur.

One way to make rail vehicles a competitive means of transportation is to increase running speed. However, higher speeds usually generate increased forces and accelerations on the vehicle, which have a negative effect on ride comfort. With conventional passive suspension, it may be difficult to maintain acceptable passenger comfort. Therefore, active technology in the secondary suspension can be implemented to improve, or at least maintain, ride comfort at increased vehicle speeds or when track conditions are unfavourable. This thesis describes the development of an active secondary suspension concept to improve ride comfort in a high-speed train. Firstly, an active lateral secondary suspension system (ALS) was developed, including dynamic control of the lateral and yaw modes of the carbody. Furthermore, quasi-static lateral carbody control was included in the suspension system in order to laterally centre the carbody above the bogies in curves at high track plane acceleration and hence to avoid bumpstop contact. By means of simulations and on-track tests, it is shown that the ALS system can offer significant lateral ride comfort improvements compared to a passive system. Two different control strategies have been studied—the relatively simple sky-hook damping and the multi-variable H∞ control—using first a quarter-car and then a full-scale vehicle model. Simulation results show that significant ride comfort improvements can be achieved with both strategies compared to a passive system. Moreover, H∞ control in combination with the carbody centring device is better at reducing the relative lateral displacement in transition curves compared to sky-hook damping. Secondly, an active vertical secondary suspension system (AVS) was developed, using simulations. Dynamic control of the vertical and roll modes of the carbody, together with quasi-static roll control of the carbody, show significant vertical ride comfort improvements and allow higher speeds in curves. Further, the AVS system compensates for negative ride comfort effects if the structural stiffness of the carbody is reduced and if the vertical air spring stiffness is increased. Finally, the two active suspension systems (ALS and AVS) were combined in simulations. The results show that both lateral and vertical ride comfort is improved with the active suspension concept at a vehicle speed of 250 km/h, compared to the passive system at 200 km/h. Further, active suspension in one direction does not affect the other direction. The ALS system has been included in two recent orders comprising more than 800 cars. / QC 20111205 / Gröna Tåget

During the last decade, power quality has been recognised asa global problem. Among different types of power qualityproblems, voltage sags have been identified to be one of themost severe problems for different process industries. The mostcommon reason to voltage sags is lightning strikes in powerlines. Protection equipment, usually located at switchyards,disconnect faulted power lines as soon as possible, which isapproximately 100 ms. Thus, the duration of voltage sags areapproximately 100 ms. The sensitivity to voltage sags ofelectrical equipment in process industries can be observed asfor instance malfunction, automatic turnoff or damages. This thesis gives an overview of three metals processes withfocus on the sensitivity to voltage sags and interruptions. Theinherent energy in the process is used to find the sensitivity.This energy may also be used to obtain "ride-through" for theprocesses. The three metals processes are a blast furnaceprocess, a hot rolling mill process and a cold rolling millprocess. The main attention in this thesis is paid to the blastfurnace process, which is powered by a line-operatedsynchronous machine. The thesis shows that the protection equipment forelectrical machines can be adjusted to avoid unnecessaryshutdowns. It is also explained why there are high torque andcurrents during voltage sags as well as after voltage sags. Itis shown that the first peak torque and current during thevoltage sags is almost proportional to the voltage change, thatis the voltage magnitude before the voltage sag minus thevoltage magnitude during the voltage sag. The first peak torqueand current after the voltage sag depends sinusoidal-like onthe duration of the voltage sag and almost proportional to thevoltage change during the voltage sag. There is no fluxsaturation during voltage sags, however after voltage sagssaturation is very likely to occur. The thesis explains why andalso how the flux is changed during and after voltage sags. The duration of voltage sags is in many cases set by theprotection equipment located in switchyards. It is shown thatthe durations of voltage sags can be changed to durations thatwill cause less peak torque and current after voltage sags forline-operated AC-machines. It is also shown how this istheoretically achieved. <b>Keywords:</b>Rolling mill, Blast furnace, Power Quality,Synchronous machine, Asynchronous machine, Voltage sag, Voltageinterruption, Ride-through, Process disturbances, Simulation,Modelling

QC 20100702

When more induction generator based wind farms are integrated into the power system, the system voltage dips and stability problems may arise due to the draw of reactive power by induction generators. The power system short-circuit event induced wind turbine trips could result in power imbalance and lead to power system instability. This thesis studies the influence of two compensation techniques on the wind turbine low voltage ride-through (LVRT) capability. One of which is based on a parallel compensation by a static synchronous compensator (STATCOM), and the other one is a series compensation by a dynamic voltage restorer (DVR). In this study, Matlab tools and models are used to simulate an active-stall controlled fixed-speed induction generator connected to a power system. Two system configurations are used to simulate three phase faults and compare the improvement of wind turbine LVRT capability due to the two studied compensation techniques. Simulation results indicate that wind turbine compensated by DVR would have better LVRT performance than that by STATCOM in dealing with the low voltage situations due to system faults.