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In the upcoming decade, the proliferation of high-LEO constellations is expected to exceed 20,000 objects, yet comprehensive Post Mission Disposal (PMD) strategies for these constellations are currently lacking. With the inherent challenges of efficiently deorbiting satellites from High-LEO orbits, there arises an urgent need to explore innovative approaches. Building upon insights garnered from the ReDSHIFT project and anticipating the proliferation of high-LEO constellations such as OneWeb, TeleSat, and GuoWang, this thesis delves into the potential viability of the Resonance Corridor Method for PMD. The investigation encompasses key metrics, including deorbit timelines and $\Delta v$ requirements to meet regulatory standards or recommendations, with comparisons drawn against alternative methods like Perigee Decrease and Graveyard Orbit solutions. Through this analysis, scenarios emerge where the Resonance Corridor method demonstrates advantages, offering feasible delta-v values while ensuring compliance with regulatory standards and recommendations. The findings yield categorizations of high-LEO constellation shells into specific disposal feasibility groups, thereby providing valuable insights into how space sustainability practices can be added into spacecraft design to align with evolving space debris mitigation standards. Additionally, certain altitude-inclination combinations are found to naturally align with the resonance corridor method, while others necessitate minor architectural adjustments to optimize effectiveness.

High-mobility scenarios, such as those experienced by autonomous vehicles or users in transit, demand reliable and high-performance network communication. This thesis presents a comprehensive measurement study comparing the performance of terrestrial 5G networks (ATT, Verizon, T-Mobile) and the Starlink satellite network in high-mobility scenarios. The study evaluates key performance metrics, including throughput and latency, across six globally distributed server locations: Virginia, California, Paris, Singapore, Tokyo, and Sydney. Measurements were conducted using a carefully designed testbed while driving a total of 860 km across urban, suburban, and rural terrains. The results reveal that 5G networks, particularly Verizon, excel in urban regions with higher peak throughput and lower latency, while Starlink demonstrates consistent performance in rural and remote areas. The impact of vehicle speed on network performance was also analyzed, highlighting Starlink’s resilience to high speeds compared to terrestrial networks. Heatmaps and statistical analyses underscore the complementary strengths of these networks, suggesting their integration via multipath protocols (e.g., MPTCP, MPQUIC) could enhance reliability and performance in critical applications such as autonomous vehicles, video conferencing, and AR/VR. This work provides valuable insights into the behavior of 5G and satellite networks in real-world high-mobility scenarios and lays a foundation for designing robust and efficient communication systems. / Master of Science / Imagine driving down a highway, streaming a video call, or playing an online game. For these experiences to work smoothly, the internet connection in your car needs to be fast, reliable, and capable of handling high speeds. This thesis explores two types of networks that can make this possible: 5G networks, which rely on cell towers, and Starlink, a satellite network providing internet from space. The study compares how these networks perform when traveling long distances across different terrains, including cities, suburbs, and rural areas. The findings show that 5G networks work best in cities, where cell towers are abundant, offering faster speeds and lower delays. On the other hand, Starlink shines in rural and remote areas, providing more consistent internet performance. By combining the strengths of both networks, we can create a system that ensures uninterrupted internet for critical uses like self-driving cars, video calls, and virtual reality experiences. Future research will explore how these two networks can be merged using advanced technologies to make internet connections even more reliable, efficient, and energy-conscious. This work is a step toward building smarter, more connected vehicles and ensuring better internet for everyone, everywhere.

Le but de cette thèse est d'étudier la mise en œuvre de services de type Internet of Thing (IoT) ou Machine to Machine (M2M) par satellite. Ce type de système pose une double problématique: d'une part au niveau couche physique : les contraintes liées au terminal (limité en puissance, énergie, taille d'antenne), au canal (potentiellement avec masquage et multitrajet) et au segment spatial impliquent la mise en œuvre de différentes techniques (entrelacement, suppression d'interférents, ...) permettant d'assurer le bilan de liaison adéquat pour le service. D'autre part, le besoin d'offrir un accès à la ressource à un grand nombre de terminaux demandant un débit faible implique l'utilisation de techniques d'accès à contention optimisées, ainsi que la prise en compte au niveau accès des problématiques d'économie d'énergie. Cette couche accès doit également être en mesure de s'interfacer avec des architectures réseaux plus vastes. On peut citer par exemple les architectures Internet afin de supporter des services IP pour l'IoT, avec des notions de services intermittents, telles qu'on les retrouve dans les réseaux DTN, ou bien les architectures 4G/5G pour la mise en œuvre de services mobiles. Cette thèse va investiguer deux approches systèmes innovantes ainsi que différentes techniques aussi bien couche physique que couche accès (potentiellement couplée) permettant leur mise en œuvre. Le premier scénario système consiste à l'utilisation d'un terminal satellite relais très bas débit (contrairement au cas classique traité dans la littérature reposant sur des terminaux broadband), s'interfaçant avec des capteurs en technologie accès terrestres. Des techniques innovantes de gestion des ressources et d'économie d'énergie au travers d'une couche accès dédiée (non DVB) pourraient permettre de supporter le nombre très important de terminaux dans ce type de système. Le second scénario repose sur une communication directe avec des capteurs/objets via une constellation satellite. Cette approche pose le problème de l'efficacité de la forme d'onde pour des services extrêmement sporadique et de la fiabilisation de la communication. Il existe de nombreux travaux coté DLR sur ce type de forme d'onde avec notamment la définition de S-MIM. Néanmoins, cette solution semble complexe et de nombreuses optimisations pourraient être apportées. Coté accès, E-SSA (communication asynchrone à spectre étalé avec SIC) défini par l'ESA est également une piste de travail intéressante même si sa mise en œuvre au niveau système et sa complexité doivent être consolidées. / The aim of this thesis is to study the implementation of Internet-based services of Thing (IoT) and Machine to Machine (M2M) through a satellite link. This type of system have to deal with two issues: first the physical layer level: terminal related constraints (limited in power, energy, and antenna size), channel (potentially with masking and multipath) and the space segment involve the implementation of different techniques (interleaving, interference cancellation,) to ensure proper link budget allowing the communication. On the other hand , the need to provide access to the resource to a large number of terminals requiring low throughput involves the use of optimized contention access techniques , as well as taking into account the level of access issues energy saving. The access layer should also be able to interface with larger networks architectures. Internet architectures for example include supporting IP services for Iota, with sporadic services, such as the ones found in the DTN networks, or 4G architectures / 5G for the implementation of mobile services. This thesis will investigate two innovative approaches and different techniques as well as physical layer access layer (potentially coupled) to their implementation. The first scenario involves the use of a very low throughput satellite relay terminal (unlike in the conventional case found in the literature based on broadband terminals), interfacing with terrestrial access technology sensors. Innovative resource management and energy saving techniques through a dedicated access layer (not DVB) could absorb the large number of terminals in this type of architecture. The second scenario is based on direct communication with sensors / objects via satellite constellation. This approach raises the question of the efficiency of the waveform for extremely sporadic services and the reliability of communication. DLR works on this type of waveform including the definition of S -MIM. However, this solution seems to be complex and many optimizations can be made. From the access layer point of view, E -SSA (asynchronous spread spectrum communication with SIC) defined by the ESA is also interesting even if its implementation to the system and its complexity level should be consolidated.

<p>1 DVD-bilaga. Medverkande: Mercedes Gomez (harpa), Stina Hellberg (harpa)</p>

Jacques Brel, Georges Brassens and Léo Ferré are three emblematic figures of post-war French song, who have been seen by critics, journalists, and the public, as the epitome of chanson, and more generally of ‘Frenchness’. The starting point of this study is the observation that the legacy of the systematic association of Brel, Brassens, and Ferré – crystallised in Cristiani’s 1969 interview and in Jean-Pierre Leloir’s photograph of the interview – has enjoyed a prosperity which seems disproportionate to the actual relevance of the comparison between the three artists. In 1969, the three singers were significant figures of French song, but they were not the only ones. Bringing them together was therefore a promise of media success, but it was in no way expected to start a legend; and yet, the myth of the interview has today taken over its reality, to the extent that the Comédie Française is presently, almost thirty years later, turning it into a play which was staged in May 2008. The photograph of the three singers smoking and drinking around a table is, today, and for a vast majority of people, the only thing that they know about the famous interview, if not about the singers. The lack of obvious grounds to justify the exclusivity of the trio suggests that there is more to it than a musical trinity. By taking into consideration the oral dimension of song, the socio-cultural context in which the trio emerged, and the mediation of their celebrity, this study aims to identify the factors of cultural and national identity that have held together the myth of the trio since its creation. Besides shedding new light on the significance of the three artists individually, this study proposes to demonstrate that each singer embodies qualities with which the French people likes to be associated, and that the trio Brel-Brassens-Ferré can therefore be seen as an arbitrary sketch of a certain ‘Frenchness’. In particular, this thesis focuses on the trio illustrating the popular representation of a key issue of French national identity: the paradoxical aspiration to both revolution and the status quo. By taking the cultural icon ‘Brel-Brassens-Ferré’ as a case study through which to address questions of popular and national identity, this study contributes to cultural studies in two different ways. Firstly, through theorising the implications of the oral dimension of songs, it demonstrates the necessity of taking into consideration factors such as performance, the media, and the socio-historical context, when studying artists as societal phenomena. Secondly, it evidences the importance of the study of forms of popular culture, such as iconic singers or music, when investigating the ways in which a society perceives its own national identity.