Les travaux décrits dans cette thèse de doctorat visent à traiter les futures architectures de fourniture de services mobiles basés sur le cloud, à travers l'évolution des infrastructures réseau partant de Mobile Cloud Computing (MCC) au Mobile Edge Computing (MEC). Nous nous sommes essentiellement concentrés sur le concept Follow Me Cloud (FMC) comme une nouvelle stratégie de fourniture de services pour une meilleure expérience utilisateur et une utilisation efficace des ressources. Cela permet aux services basés sur le cloud de "suivre" leurs utilisateurs mobiles au cours de leurs déplacements à travers les technologies de réseau d'accès, tout en fournissant le service basé sur le cloud via le point de service le plus optimal au sein de l'infrastructure cloud. Plusieurs contributions sont proposées dans cette thèse, avec des évaluations à la fois en analyse théorique et en simulation scientifique.Premièrement, nous avons proposé une architecture alternative FMC qui permet: (i) d'ouvrir la conception FMC sur les technologies d'accès réseau mobile non-3GPP (ii) d'assurer l'interopérabilité entre différents domaines PMIPv6 permettant au MN une itinérance inter-domaines PMIPv6 avec une mobilité IP transparente ainsi qu'une continuité de session de service.(iii) d'offrir une architecture sans tunnel dans les situations d'itinérance de MN, en évitant ainsi toute surcharge supplémentaire liée aux tunnels dans la gestion de la mobilité. Le schéma proposé exploite la technologie SDN/OpenFlow et le protocole de gestion de la mobilité PMIPv6 en les intégrant dans un unique framework permettant de réaliser la vision FMC.Deuxièmement, pour aborder les problèmes d'évolutivité et de résilience dans les architectures SDN/OpenFlow centralisées de plan de contrôle, nous avons introduit une nouvelle conception d'un contrôleur SDN élastique et distribué adapté pour MCC et plus particulièrement pour les systèmes de gestion FMC. Nous avons illustré comment le nouveau schéma de plan de contrôle est distribué sur une architecture hiérarchique à deux niveaux, un premier niveau avec un seul contrôleur SDN global et un second niveau avec plusieurs contrôleurs SDN locaux. Ensuite, nous avons présenté les éléments constitutifs de notre nouvel framework de plan contrôle, le calcul de l'indicateur de performance (KPI) du système, et nous avons fixé l'objectif clé de notre conception visant à maintenir la valeur KPI du système dans une fenêtre de seuil prédéfinie. Enfin, nous avons démontré comment cet objectif est atteint en adaptant dynamiquement le nombre et l'emplacement des contrôleurs SDN locaux en utilisant la technologie NFV pour provisionner les contrôleurs SDN en tant que instances VNF (fonction réseau virtuelle) dans le cloud.Troisièmement, nous avons introduit le concept FMeC, exploitant les capacités offertes par la combinaison des architectures MEC et FMC dans le but de satisfaire aux exigences des systèmes automobiles 5G. Nous avons commencé par définir les éléments clés du concept FMeC permettant de fournir la technologie FMC en bordure des réseaux mobiles. Ensuite, nous avons présenté une projection de notre solution FMeC sur un cas d'utilisation de conduite automatisée intégrant l'industrie automobile aux infrastructures Telecom en vue de la vision automobile 5G future. Avec une focalisation sur les types de communications V2I/N, nous avons présenté la conception de notre architecture FMeC basée sur les technologies SDN/OpenFlow et les entités de l'infrastructure MEC dont les ressources sont mises en commun pour fournir un cloud de bordure fédéré. Enfin, nous avons présenté notre framework sensible à la mobilité pour le placement des services dans le cloud de bordure, ce dernier est fondé sur un ensemble d'algorithmes de base qui permettent d'atteindre les exigences de QoS de la conduite automatisée en termes de latence ultra-courte au sein du réseau 5G. / This Ph.D. thesis aims to deal with the future delivery architectures of mobile cloud-based services, through network infrastructures evolving from Mobile Cloud Computing (MCC) to Mobile Edge Computing (MEC). We mainly focused on Follow Me Cloud (FMC) concept as a new service delivery strategy for improved user experience and efficient resource utilization. That enables cloud-based services to follow their mobile users during their movement across access network technologies and by delivering the cloud-service via the optimal service point inside the cloud infrastructure. Several contributions are proposed in this thesis and evaluated in both theoretical analysis and scientific simulation.First, we proposed an alternative FMC architecture that allows: (i) to open the FMC design on non-3GPP mobile network access technologies (ii) to provide interoperability among different PMIPv6 domains permitting MNs inter-PMIPv6 domain roaming with seamless IP mobility and service session continuity (iii) to offer a tunnel-free architecture in MNs roaming situation, avoiding any additional overhead associated with tunneling in mobility management. This proposed scheme leverage SDN/OpenFlow technology and PMIPv6 mobility management protocol by integrating them within a framework permitting to realize the FMC vision.Second, to address the scalability and resiliency concerns in centralized SDN/OpenFlow control plane architecture, we introduced a new design of an elastic distributed SDN controller tailored for Mobile Cloud Computing (MCC) and more notably for Follow Me Cloud (FMC) management systems. We illustrated how the new control plane scheme is distributed on two-level hierarchical architecture, a first level with a single global SDN controller and a second level with several local SDN controllers. Then, we presented the building blocks of our novel control plane framework, the system Key Performance Indicator (KPI) computation and set the key objective of our design aiming to keep the system KPI value within a predefined threshold window. Last, we proved how this goal is achieved by adapting the number of local SDN controllers and their locations in an elastic manner and deploying them as VNF instances on the cloud thanks to NFV technology.Third, we introduced FMeC concept, leveraging the intertwining of MEC and FMC architectures with the aim of sustaining requirements of the 5G automotive systems. We began by defining FMeC key concept elements permitting to provide FMC technology at the edge of mobile networks. Then, we presented an automated driving use case projection of our FMeC solution integrating automotive with Telco infrastructures towards the future 5G automotive vision. Focusing on the V2I/N communications types, we introduced our FMeC design architecture based on SDN/OpenFlow technologies and MEC infrastructure entities whose resources are pooled together to provide a federated edge clouds. Finally, we presented our mobility-aware framework for edge-cloud service placement based on a set of basic algorithms that permit achieving the automated driving QoS requirements in terms of ultra-short latency within 5G network.

Web2.0的時代來臨，「使用者創作內容（UGC）」概念開始提出。照片分享服務Instagram出現，大量照片上傳至此。因此，本研究希望探討以下三個研究問題：社群媒體上的熱門影像風格是如何建立的？社群媒體上meme是如何保持和變化的？Meme是否會有一個特定的影像風格？本研究通過資料探勘和內容分析的方法建立了一個以圖片為主的研究方法。本研究選擇了現在在Instagram上熱門的“follow me to”的背面牽手照為例來進行分析。 通過比較分析原攝影師Murad Osmann“follow me to”照片和其仿拍者的照片，得出了熱門影像有以下幾個特點：1） 與社群媒體的平台特性做結合。2) 容易模仿。3) 注重服装和影像的敘事性。4) 有充裕的經濟資本找到全球的風景作為背景。5) 有高藝術美感和技術操弄的精細度。仿拍型meme在構圖和內容的部分上有較高一致。不同之處有以下幾點：1) 在景別、內容上相似但更豐富。2) 不注重影像的敘事性表達，只呈現景色和人。3) 個人仿拍者的場景變化度小。4) 不注重攝影技巧的模仿。總之，仿拍型Meme的不穩定性強，較難形成特定的風格，但有部分仿拍者有自己的特點。 / In the age of web 2.0, the concept of ‘the User Generated Content (UGC)’ is put forward. Now millions of images posted on the photo sharing service such as Instagram. We want to explore the following three questions: How is the style of hot images on the social media set up? How are memes on social media to maintain and change? Do memes have a specific image style? We performed the image-based method of data mining and content analysis to study the three research questions. We choose ‘follow me to’—the hot photos on Instagram— as an example for analysis. Though the comparative analysis of the ‘follow me to’ photos of photographer Murad Osmann and the imitators. The hot images on social media have characteristics: 1) They combine with social media platforms’ characteristics. 2) It’s easy to imitate photo’s composition and view. 3) Pay attention to model’s clothing and image narrative. 4) Have enough fund to take pictures around world. 5) Have arts beauty and skilled photography. The photos of imitators and photographer Murad Osmann have the same composition and contents. There also have some differences: 1) Richer in shooting scale and contents. 2) Not pay attention to image narrative. 3) Not have enough fund to take pictures around world. 4) Not have enough arts beauty and skilled photography. In conclusion, compare to hot photos, most of imitators’ don’t have their own characteristics. But some imitators have some characteristics.

Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2018-02-20T11:22:54Z No. of bitstreams: 2 Dissertação - Vinícius Bulhões da Silva Lima - 2017.pdf: 1288600 bytes, checksum: 399c59b930da350822c70cfe23640219 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2018-02-20T12:27:27Z (GMT) No. of bitstreams: 2 Dissertação - Vinícius Bulhões da Silva Lima - 2017.pdf: 1288600 bytes, checksum: 399c59b930da350822c70cfe23640219 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2018-02-20T12:27:27Z (GMT). No. of bitstreams: 2 Dissertação - Vinícius Bulhões da Silva Lima - 2017.pdf: 1288600 bytes, checksum: 399c59b930da350822c70cfe23640219 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-10-25 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / Nowadays, it is common to find a variety of powerful devices which execute applications that were only supported by machines that were traditionally more capable, such as desktop PCs. Due to the variety of plataforms and operating systems, which exhibit different available resources and user interaction methods, applications need to be provided in different versions. As a result, users work with the same application on different devices, at different locations and at different times of the day. Facing these user's new possibilities, applications need support to allow users to easily switch from one device to another and resume their tasks at the same point where they stopped. This work introduces a middleware architecture that can be used by web applications to acquire the interaction session migration capability. Thus, web applications' interaction sessions, and their related data, can be migrated from one device to another in an automatic and seamless way. A middleware platform was designed and implemented in order to evaluate the proposed approach. Also, it is evaluated the effect of transfer mechanisms on the handoff process of the interaction session application. / O mercado oferece vários dispositivos com capacidade de processamento suficiente para executar aplicações que anteriormente eram apenas suportadas por máquinas mais robustas, como os computadores de mesa. Tais aplicações possuem diferentes versões finais para cada plataforma e sistema operacional, pois os recursos como capacidade de processamento, armazenamento e periféricos mudam e a interação com o usuário varia de acordo com esses recursos. Essa diversidade possibilita usuários trabalharem com a mesma aplicação em diferentes dispositivos, em diferentes locais e durante diferentes períodos do dia. Com essas possibilidades oferecidas ao usuário, as aplicações necessitam de suporte para que os usuários possam facilmente mudar de um dispositivo para outro e continuar suas tarefas no mesmo ponto no qual pararam. As aplicações Web estão crescendo em popularidade entre os usuários e também podem se beneficiar do suporte para mudar o dispositivo no qual interagem com o usuário. Este trabalho apresenta a arquitetura de um middleware por meio do qual aplicações Web podem adquirir a capacidade de migrar sessões de interação com o usuário. Como resultado, as sessões de interação das aplicações Web, juntamente com os dados relacionados a elas, podem ser transferidas de um dispositivo para outro de forma automática e transparente. Uma implementação da proposta do middleware foi feita a fim de avaliar a abordagem. Também é avaliado o efeito da escolha do mecanismo de transferência para o envido dos dados relacionados a sessão de interação da aplicação.

Technological instruments are used in sports to record and analyze data of performing athletes, in order to improve techniques and increase competitiveness. A method to allow for recording of data of a moving subject is by usage of a depth camera mounted on a drone that can track and follow a subject. The objective was to develop a drone system that was capable of autonomous operation based on follow-me mode. The original prototype lacked required hardware for reliable orientation in environments with varying air-pressure, and software for a follow-me mode-system. Height above ground was measured using a downward facing depth sensor and a 3D image of the subject was generated by a depth camera. The data was then used by the drone to navigate through the environment. Overall performance of the height adjustment would be sufficient to allow for autonomous operation according to test results. Testing of the follow-me mode showed that the current configuration was not capable of retaining a sufficiently consistent position relative to the subject, hence high video quality was not achieved. However, it gave a positive indication that autonomous operation based on a depth camera is possible. The concept has a high potential and if the system would be further developed it could allow athletes to record and analyze data in order to improve techniques and increase competitiveness. / Teknologiska instrument används inom sport för att samla in och analysera data om idrottare, detta för att kunna förbättra teknik och öka prestationsförmåga. En metod för att kunna samla in data från ett rörligt subjekt är genom användandet av en djupkamera monterad på en drönare som kan spåra och följa efter ett subjekt. Målet var att utveckla ett drönarsystem som är kapabel till autonom drift baserat på ett “följ mig-läge” (från engelskans follow-me mode). Den ursprungliga modellen saknade hårdvara som krävs för en pålitlig orientering i miljöer med varierande lufttryck samt mjukvara för följ mig-läge. Höjd över markytan mättes med en nedåtriktad djupsensor och en 3D-bild av ett subjekt genererades av en djupkamera. Datan användes sedan av drönaren för navigation i omgivningen. Övergripande prestandan för höjdjusteringen skulle vara tillräcklig för att möjliggöra autonom drift enligt testresultat. Testning av följ mig-läget visade att aktuell konfiguration ej är kapabel till att erhålla en tillräckligt konsekvent position relaterat till subjektet, därav var hög video kvalite ej uppnåelig. Däremot gavs en positiv indikation på att autonom drönarnavigering kan baseras på ett system med djupkamera. Konceptet har en hög potential och vid vidare utveckling skulle det kunna möjliggöra för idrottare att kunna samla in och analysera data för att kunna förbättra teknik och öka prestationsförmåga.

The present thesis explores the Spirituality of following Jesus according to the Fourth Gospel by investigating the whole profile of the term akoloutheo. In particular, this thesis probes what theological implications are communicated by the association of akoloutheo with correlated motifs in the pericopes where it is employed in spiritual connotation. The texts investigated are: John 1:35-51; 8:12; 10:1-42; 12:26; 13:36-14:3; 21:1-19. Each text communicates the particular and manifold aspects of the Spirituality of following Jesus. Yet, the most distinctive aspects of the Johannine Spirituality of following Jesus imparted throughout almost all the research texts can be summarized by “directional” and “relational.” The life of following Jesus is a journey toward a destination to which Jesus leads his followers, that is, into a relationship with the Father by being with Jesus where he is, and by being with him where he goes and will be in glory. It is ultimately participating in the Son’s communion with the Father. Jesus, who was with the Father and in the bosom of the Father, came down (descended) to bring his followers to the Father, and ascends to the Father taking them with him, so they may be with him where he is with the Father in love and glory. / Christian Spirituality, Church History and Missiology / D.Th. (Christian Spirituality)