Dissertations / Theses: 'Smart content'

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Moradi, Arvin. "Smart Clustering System for Filtering and Cleaning User Generated Content : Creating a profanity filter for Truecaller." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-124408.

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This thesis focuses on investigating and creating an application for filtering user-generated content. The method was to examine how profanity and racist expressions are used and manipulated to evade filtering processes in similar systems. Focus also went on to study different algorithms to get this process to be quick and efficient, i.e., to process as many names in the shortest amount of time possible. This is because the client needs to filter millions of new uploads every day. The result shows that the application detects profanity and manipulated profanity. Data from the customer’s database was also used for testing purposes, and the result showed that the application also works in practice. The performance test shows that the application has a fast execution time. We could see this by approximating it to a linear func-tion with respect to time and the number of names entered. The conclusion was that the filter works and discovers profanity not detected earlier. Future updates to strengthen the decision process could be to introduce a third-party service, or a web interface where you can manually control decisions. Execution time is good and shows that 10 million names can be pro-cessed in about 6 hours. In the future, one can parallelize queries to the database so that multiple names can be processed simultaneously. Denna avhandling fokuserar på att utreda och skapa en applikation för filtrering av användargenererat innehåll. Metoden gick ut på att undersöka hur svordomar samt rasistiska uttryck används och manipuleras för att undgå filtrerings processer i liknande system. Fokus gick även ut på att studera olika algoritmer för att få denna process att vara snabb och effektiv, dvs kunna bearbeta så många namn på kortast möjliga tid. Detta beror på att kunden i detta sammanhang får in miljontals nya uppladdningar varje dag, som måste filtreras innan använding. Resultatet visar att applikationen upptäcker svordomar i olika former. Data från kundens databas användes också för test syfte, och resultatet visade att applikationen även fungerar i praktiken. Prestanda testet visar att applikationen har en snabb exekveringstid. Detta kunde vi se genom att estimera den till en linjär funktion med hänsyn till tid och antal namn som matats in. Slutsatsen blev att filtret fungerar och upptäcker svordomar som inte upptäckts tidigare i kundens databas. För att stärka besluten i processen kan man i framtida uppdateringar införa tredje parts tjänster, eller ett web interface där man manuelt kan styra beslut. Exekverings tiden är bra och visar att 10 miljoner namn kan bearbetas på cirka 6 timmar. I framtiden kan man parallellisera förfrågningarna till databasen så att flera namn kan bearbetas samtidigt.

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Sahlin, Jesper, and Victor Olsson. "A Smart Terrain based model for generating behavioural patterns." Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20441.

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I denna uppsats kommer vi att presentera en modell vars syfte är att generera beteende-mönster för rollfigurer i digitala spel. Spelgenren rollspel (eng. Role-playing games) placerarspelaren i en värld fylld av fantastiska monster och modiga hjältar. I ett sådant spel ärde goda karaktärerna minst lika viktiga som de ondskefulla varelser som spelaren kämparmot. Hur ser livet ut för en spelkaraktär när den inte hjälper spelaren på dess äventyr? Dekanske lever som fiskare på havet eller som bönder ute på fältet. Mer troligt är att de bori en by tillsammans med en massa andra spännande karaktärer. Vi undersöker hur sådanakaraktärers vardag ser ut och tittar på en teknik som används för att skapa deras beteen-demönster, Cyclic Scheduling. Tekniken innebär att utvecklare skapar scheman som styrrollfigurernas beteende. Dessa scheman måste skapas i förväg under spelets utveckling ochkräver i stora spel många arbetstimmar för att utvecklas. Modellen vi presenterar i dennauppsats använder tekniken Smart Terrain för att automatiskt generera beteendemönsteroch kan användas för att minska utvecklingstid. Vi diskuterar hur modellen kan användas iföränderliga spelvärldar där utvecklare inte i förhand vet hur spelens omgivningar kommeratt se ut. In this thesis we present a model for the generation of behaviour patterns for charactersin digital games. In the genre Role-playing games the player is placed in a world filledwith fantastic monsters and brave heroes. In this kind of game the good characters areas important as the evil creatures the player must fight against. What kind of life doesa game character have when not helping the player on adventures? Maybe they live asfishermen on the sea or as farmers in the fields. More likely they live in villages amongstother exciting game characters. We examine what these characters’ daily routines looks likeand look at a technique used for creating their behaviour patterns, Cyclic Scheduling. Thetechnique is used by developers to create schedules that control the behaviour of charactersin games. These schedules have to be created during the game development process andfor bigger games this consumes a lot of time. The model we presents in this thesis uses thetechnique Smart Terrain to automatically generate behaviour patterns thereby reducingthe development time. We discuss how the model can be used in dynamic game worldswhere the developers are unaware of potential changes in the game world.

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Perakakis, Emmanuel. "Web on TV : designing web content for enhanced user experience on an Internet-connected television device." Thesis, Brunel University, 2018. http://bura.brunel.ac.uk/handle/2438/17134.

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The Internet is gradually expanding to many new devices, in addition to its original native environment that was the Personal Computer. This wave started with mobile devices and as we enter the Internet of Things era, connectivity is possible from cars to light switches. One of the first devices, to follow mobiles, is the Television. Connectivity and two-way interaction on the TV device has in fact started even in the first days of the medium, but had failed to make it widely available, due to technological limitations of the past. Now, this has changed, with the Smart TV devices that can utilize the fast internet connections that are available in most developed countries. However, even though the technology and devices are now widely available there are still challenges in order to make the vast Internet and web content available in the Smart TVs. These challenges, have a familiar resemblance to what happened a few years ago, when internet connectivity was introduced on the mobile phone. Although, it was "feasible" to access any webpage from your mobile device, the experience for the user was often very frustrating, due to many factors, that derived from the fact that the web was designed for large screens and mice of the desktop computers, not the small touch screens and limited hardware of the phone. Nonetheless, these obstacles were successfully overcome, by introducing techniques and methodologies (e.g. Responsive Web Design) to make the web more mobile-friendly and also work from the manufacturers to improve their devices to this direction as well. The success of these actions is now evident, since the access to the web from mobile devices has surpassed the PC, and it is now a standard practice for every new website to be mobile-friendly. In this research work, we will attempt to do one very significant step towards this direction for the Smart TV. In other words, to discover what has to be done to make the web more TV-friendly. To do this, we explore many different TV devices from several manufacturers and see their similarities and differences. We explore numerous user studies and surveys to discover what is the problem in the Web experience on the TV, so that we can propose solutions to make web content TV-friendly. Based on these findings, we design prototypes and put them to the test on different devices and userevaluation. Finally, we propose a set of guidelines, that web designers can apply on their websites to make them TV-friendly, in the hope to introduce the first step towards a friendlier internet era for the TV.

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Pettinari, Marina <1979&gt. "Context detection and abstraction in smart environments." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/1123/1/Tesi_Pettinari_Marina.pdf.

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Context-aware computing is currently considered the most promising approach to overcome information overload and to speed up access to relevant information and services. Context-awareness may be derived from many sources, including user profile and preferences, network information, sensor analysis; usually context-awareness relies on the ability of computing devices to interact with the physical world, i.e. with the natural and artificial objects hosted within the "environment”. Ideally, context-aware applications should not be intrusive and should be able to react according to user’s context, with minimum user effort. Context is an application dependent multidimensional space and the location is an important part of it since the very beginning. Location can be used to guide applications, in providing information or functions that are most appropriate for a specific position. Hence location systems play a crucial role. There are several technologies and systems for computing location to a vary degree of accuracy and tailored for specific space model, i.e. indoors or outdoors, structured spaces or unstructured spaces. The research challenge faced by this thesis is related to pedestrian positioning in heterogeneous environments. Particularly, the focus will be on pedestrian identification, localization, orientation and activity recognition. This research was mainly carried out within the “mobile and ambient systems” workgroup of EPOCH, a 6FP NoE on the application of ICT to Cultural Heritage. Therefore applications in Cultural Heritage sites were the main target of the context-aware services discussed. Cultural Heritage sites are considered significant test-beds in Context-aware computing for many reasons. For example building a smart environment in museums or in protected sites is a challenging task, because localization and tracking are usually based on technologies that are difficult to hide or harmonize within the environment. Therefore it is expected that the experience made with this research may be useful also in domains other than Cultural Heritage. This work presents three different approaches to the pedestrian identification, positioning and tracking: Pedestrian navigation by means of a wearable inertial sensing platform assisted by the vision based tracking system for initial settings an real-time calibration; Pedestrian navigation by means of a wearable inertial sensing platform augmented with GPS measurements; Pedestrian identification and tracking, combining the vision based tracking system with WiFi localization. The proposed localization systems have been mainly used to enhance Cultural Heritage applications in providing information and services depending on the user’s actual context, in particular depending on the user’s location.

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Pettinari, Marina <1979&gt. "Context detection and abstraction in smart environments." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/1123/.

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Context-aware computing is currently considered the most promising approach to overcome information overload and to speed up access to relevant information and services. Context-awareness may be derived from many sources, including user profile and preferences, network information, sensor analysis; usually context-awareness relies on the ability of computing devices to interact with the physical world, i.e. with the natural and artificial objects hosted within the "environment”. Ideally, context-aware applications should not be intrusive and should be able to react according to user’s context, with minimum user effort. Context is an application dependent multidimensional space and the location is an important part of it since the very beginning. Location can be used to guide applications, in providing information or functions that are most appropriate for a specific position. Hence location systems play a crucial role. There are several technologies and systems for computing location to a vary degree of accuracy and tailored for specific space model, i.e. indoors or outdoors, structured spaces or unstructured spaces. The research challenge faced by this thesis is related to pedestrian positioning in heterogeneous environments. Particularly, the focus will be on pedestrian identification, localization, orientation and activity recognition. This research was mainly carried out within the “mobile and ambient systems” workgroup of EPOCH, a 6FP NoE on the application of ICT to Cultural Heritage. Therefore applications in Cultural Heritage sites were the main target of the context-aware services discussed. Cultural Heritage sites are considered significant test-beds in Context-aware computing for many reasons. For example building a smart environment in museums or in protected sites is a challenging task, because localization and tracking are usually based on technologies that are difficult to hide or harmonize within the environment. Therefore it is expected that the experience made with this research may be useful also in domains other than Cultural Heritage. This work presents three different approaches to the pedestrian identification, positioning and tracking: Pedestrian navigation by means of a wearable inertial sensing platform assisted by the vision based tracking system for initial settings an real-time calibration; Pedestrian navigation by means of a wearable inertial sensing platform augmented with GPS measurements; Pedestrian identification and tracking, combining the vision based tracking system with WiFi localization. The proposed localization systems have been mainly used to enhance Cultural Heritage applications in providing information and services depending on the user’s actual context, in particular depending on the user’s location.

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GARIBOTTO, CHIARA. "Multimedia Context Awareness for Smart Mobile Environments." Doctoral thesis, Università degli studi di Genova, 2019. http://hdl.handle.net/11567/940889.

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Nowadays the development of the IoT framework and the resulting huge number of smart connected devices opens the door to exploit the presence of multiple smart nodes to accomplish a variety of tasks. Multimedia context awareness, together with the concept of ambient intelligence, is tightly related to the IoT framework, and it can be applied to a large number of smart scenarios. In this thesis, the aim is to study and analyze the role of context awareness in different applications related to smart mobile environments, such as future smart spaces and connected cities. Indeed, this research work focuses on different aspects of ambient intelligence, such as audio-awareness and wireless-awareness. In particular, this thesis tackles two main research topics: the first one, related to the framework of audio-awareness, concerns a multiple observations approach for smart speaker recognition in mobile environments; the second one, tied to the concept of wireless-awareness, regards Unmanned Aerial Vehicle (UAV) detection based on WiFi statistical fingerprint analysis.

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Hallberg, Josef. "Context-sharing and mediated communication for smart environments." Doctoral thesis, Luleå : Department of Computer Science and Electrical Engineering, Division of Media Technology, Luleå University of Technology, 2008. http://epubl.luth.se/1402-1544/2008/66.

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Manzaroli, Daniele <1978&gt. "Architectures for Context Aware Services in Smart Environments." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2569/1/PhD_Thesis_-_Daniele_Manzaroli.pdf.

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This thesis deals with Context Aware Services, Smart Environments, Context Management and solutions for Devices and Service Interoperability. Multi-vendor devices offer an increasing number of services and end-user applications that base their value on the ability to exploit the information originating from the surrounding environment by means of an increasing number of embedded sensors, e.g. GPS, compass, RFID readers, cameras and so on. However, usually such devices are not able to exchange information because of the lack of a shared data storage and common information exchange methods. A large number of standards and domain specific building blocks are available and are heavily used in today's products. However, the use of these solutions based on ready-to-use modules is not without problems. The integration and cooperation of different kinds of modules can be daunting because of growing complexity and dependency. In this scenarios it might be interesting to have an infrastructure that makes the coexistence of multi-vendor devices easy, while enabling low cost development and smooth access to services. This sort of technologies glue should reduce both software and hardware integration costs by removing the trouble of interoperability. The result should also lead to faster and simplified design, development and, deployment of cross-domain applications. This thesis is mainly focused on SW architectures supporting context aware service providers especially on the following subjects: - user preferences service adaptation - context management - content management - information interoperability - multivendor device interoperability - communication and connectivity interoperability Experimental activities were carried out in several domains including Cultural Heritage, indoor and personal smart spaces – all of which are considered significant test-beds in Context Aware Computing. The work evolved within european and national projects: on the europen side, I carried out my research activity within EPOCH, the FP6 Network of Excellence on “Processing Open Cultural Heritage” and within SOFIA, a project of the ARTEMIS JU on embedded systems. I worked in cooperation with several international establishments, including the University of Kent, VTT (the Technical Reserarch Center of Finland) and Eurotech. On the national side I contributed to a one-to-one research contract between ARCES and Telecom Italia. The first part of the thesis is focused on problem statement and related work and addresses interoperability issues and related architecture components. The second part is focused on specific architectures and frameworks: - MobiComp: a context management framework that I used in cultural heritage applications - CAB: a context, preference and profile based application broker which I designed within EPOCH Network of Excellence - M3: "Semantic Web based" information sharing infrastructure for smart spaces designed by Nokia within the European project SOFIA - NoTa: a service and transport independent connectivity framework - OSGi: the well known Java based service support framework The final section is dedicated to the middleware, the tools and, the SW agents developed during my Doctorate time to support context-aware services in smart environments.

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Manzaroli, Daniele <1978&gt. "Architectures for Context Aware Services in Smart Environments." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2569/.

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This thesis deals with Context Aware Services, Smart Environments, Context Management and solutions for Devices and Service Interoperability. Multi-vendor devices offer an increasing number of services and end-user applications that base their value on the ability to exploit the information originating from the surrounding environment by means of an increasing number of embedded sensors, e.g. GPS, compass, RFID readers, cameras and so on. However, usually such devices are not able to exchange information because of the lack of a shared data storage and common information exchange methods. A large number of standards and domain specific building blocks are available and are heavily used in today's products. However, the use of these solutions based on ready-to-use modules is not without problems. The integration and cooperation of different kinds of modules can be daunting because of growing complexity and dependency. In this scenarios it might be interesting to have an infrastructure that makes the coexistence of multi-vendor devices easy, while enabling low cost development and smooth access to services. This sort of technologies glue should reduce both software and hardware integration costs by removing the trouble of interoperability. The result should also lead to faster and simplified design, development and, deployment of cross-domain applications. This thesis is mainly focused on SW architectures supporting context aware service providers especially on the following subjects: - user preferences service adaptation - context management - content management - information interoperability - multivendor device interoperability - communication and connectivity interoperability Experimental activities were carried out in several domains including Cultural Heritage, indoor and personal smart spaces – all of which are considered significant test-beds in Context Aware Computing. The work evolved within european and national projects: on the europen side, I carried out my research activity within EPOCH, the FP6 Network of Excellence on “Processing Open Cultural Heritage” and within SOFIA, a project of the ARTEMIS JU on embedded systems. I worked in cooperation with several international establishments, including the University of Kent, VTT (the Technical Reserarch Center of Finland) and Eurotech. On the national side I contributed to a one-to-one research contract between ARCES and Telecom Italia. The first part of the thesis is focused on problem statement and related work and addresses interoperability issues and related architecture components. The second part is focused on specific architectures and frameworks: - MobiComp: a context management framework that I used in cultural heritage applications - CAB: a context, preference and profile based application broker which I designed within EPOCH Network of Excellence - M3: "Semantic Web based" information sharing infrastructure for smart spaces designed by Nokia within the European project SOFIA - NoTa: a service and transport independent connectivity framework - OSGi: the well known Java based service support framework The final section is dedicated to the middleware, the tools and, the SW agents developed during my Doctorate time to support context-aware services in smart environments.

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Biondi, Salvatore Michele. "Cooperating Smart Objects in IoT Infrastructures for Context-Aware Applications." Doctoral thesis, Università di Catania, 2019. http://hdl.handle.net/10761/4146.

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Il lavoro svolto durante il mio Dottorato di Ricerca si e' focalizzato su Smart Object cooperanti all'interno di infrastrutture IoT, sfruttanti le tecnologie indoor e outdoor appena mensionate per la realizzazione di applicazioni Context-Aware. Questa tesi presentera' i concetti dell'Internet of Things e diverse questioni ancora irrisolte, o parzialmente risolte, insieme ai lavori sviluppati durante questi anni, nei quali ho cercato di applicare i concetti dell'IoT in diversi ambiti quali Citta' Intelligenti (Smart Cities) ed Ambienti Intelligenti (Smart Environment). Il primo capitolo di questa tesi introdurra' l'Internet of Things come nuovo paradigma ed miglioramento della qualita' della vita. Verranno messe in evidenza le origini dell'IoT e il suo sviluppo attraverso l'introduzione di nuove tecnologie. Questo capitolo introduttivo mostrera' l'incremento delle capacita' degli oggetti ordinari attraverso l'utilizzo dei concetti dell'IoT, e presentera' diversi domini applicativi in cui questi dispositivi vengono posti. Inoltre, il primo capitolo introdurra' l'importante concetto di Context, lo sviluppo delle applicazioni Context-Aware per la realizzazione di servizi personalizzati all'interno degli ambienti smart, la realizzazione di reti IoT che presentano molti punti in comune con le reti informatiche tradizionali, ed un insieme di problematiche ancora aperte che rappresentano sfide per la comunita' di ricerca. Gli altri capitoli riporteranno una serie di lavori sviluppati durante l'attivita' di Dottorato di Ricerca, e che hanno come obiettivo la copertura di diversi domini IoT fornendo servizi in grado di aumentare l'esperienza utente all'interno degli ambienti smart. Questi lavori hanno l'obiettivo di fornire soluzioni per citta' (Capitolo \ref{chap:smartparking}, \ref{chap:baas}), abitazioni e uffici (Capitolo \ref{chap:CooperativeObjectsChapter}), e musei (Chapter \ref{chap:smartworks}). L'obiettivo comune e' mostrare come l'IoT possa rappresentare un valore aggiunto nella vita delle persone. Le persone hanno mostrato un grande interesse nei confronti della tacnologia, ed un numero non indifferente di utenti sono gia' forniti da una serie di dispositivi smart (come gli smartphone). Per questo motivo, penso sia molto utile sfruttare questi dispositi ed i loro sensori per la realizzazione e la personalizzazione di servizi, senza la necessita' di utilizzare ulteriori costose infrastrutture, o fastidiosi sensori addizionali. Infine, questa Tesi introdurra' un sistema maggiormente complesso e costoso, ovvero un sistema per il monitoraggio della qualita' dell'aria, che ha come obiettivo quello di realizzare un report dell'inquinamento attraverso un applicazione web, raccogliendo informazioni di contesto dell'utente per fornire dei consigli su quali strade utilizzare o quali posti raggiungere evitando l'inquinamento.

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Karchoud, Riadh. "Les Applications Long-Life dédiées à l’utilisation dans les smart." Thesis, Pau, 2017. http://www.theses.fr/2017PAUU3037/document.

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De nos jours, les appareils mobiles hébergent de nombreuses applications directement téléchargées et installées à partir d'un "Store" d'applications mobiles. L'existence d'une telle quantité d'applications pour une multitude d'objectifs impose une énorme surcharge sur les utilisateurs, qui doivent sélectionner, installer, supprimer et exécuter les applications appropriées.En outre, ces applications ont négligé la prise en compte du contexte de l'utilisateur. Elles proposent des scénarios d'utilisation statiques et non évolutifs. Ces applications servent à des fins spécifiques et sont supprimées ou oubliées, la plupart du temps, après la première utilisation. De plus, ces applications ne tiennent pas compte du monde des objets connectés en raison de leur architecture monolithique mise en œuvre pour fonctionner sur des appareils individuels. La solution proposée et intitulée "Long Life Application" offre une nouvelle façon de répondre aux besoins de l'utilisateur de façon dynamique et distribuée. Elle propose une évolution continue des applications (encours d'exécution) en ajoutant, supprimant, et déplaçant des fonctionnalités sur les appareils utilisés par l’utilisateur. Elle permet, aussi, de modifier le mode d'interaction en distribuant les exécutions sur plusieurs appareils en fonction des besoins de l'utilisateur. Pendant que l’utilisateur se déplace dans son environnement, l'application détecte des événements environnementaux et construit des situations contextuellement décrites. Ainsi, ce travail vise à offrir un nouveau type d'applications mobiles capables de détecter, de formuler et de comprendre le contexte des utilisateurs puis de réagir en conséquence Nowadays, mobile devices host many applications that are directly downloaded and installed from mobile application stores. The existence of such a large amount of apps for a myriad of purposes imposes a huge overhead on users, who are in charge of selecting, installing, and executing the appropriate apps, as well as deleting them when no longer needed. Moreover, these applications have mostly neglected to take into account the user’s context, as they propose static non-evolving scenarios. These applications serve for specific purposes and get deleted or forgotten most of the time after the first use. Furthermore, these apps fail to consider the, soon coming, connected world due to their monolithic architecture implemented to work on single devices. The proposed long-life application provides a new way to respond to the user’s needs dynamically and distributedly. It evolves at runtime by including/excluding business functionalities, updating the interaction mode, and migrating executions on multiple devices according to the user’s preferences. While he/she moves in his/her surroundings, the app detects the occurring events and builds contextually-described situations. So, this work aims to offer a new type of mobile application able to detect, formulate and understand the users’ context then react accordingly

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Miftah, el kheir Laila. "Smart devices for biomedical applications." Thesis, Bourgogne Franche-Comté, 2017. http://www.theses.fr/2017UBFCD054.

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Dans cette thèse, nous nous sommes intéressés aux systèmes intelligents pour des applicationsmédicales et cosmétiques. Ainsi, nous avons conçu et réalisé trois instruments. Le premier estdédié à la mesure de la mouillabilité de la peau. L’originalité de ce dispositif réside en sa capacité àdonner une image 3D de la goûte de la surface de la peau explorée et de donner le comportementdynamique de la goûte. Cette stratégie nous donnera la possibilité de créer de nouvelles basesde données relatives à la mouillabilité de tout le corps humain. En effet, nous disposons que desdonnées sur la mouillabilité de l’avant-bras. Le deuxième instrument intelligent concerne la mesurede la réflectance d’une surface. Ce dispositif assure une mesure de très haute résolution angulairede la BRDF et une très bonne répétabilité de la mesure. Il a été validé sur la peau pour la mesurede l’ éclat. Et enfin le troisième instrument, basé sur une méthode originale de mesure de vibrationà l’aide d’un système de stéréo-vision associée à un motif périodique. Il a été appliqué pour lamesure du mouvement thoracique et abdominal lors de la respiration. Notre principale motivationpour développer ce système fut la réduction des artefacts, dus aux mouvements d’un patient lorsd’un examen radiologique Smart Devices have been widely used by health care and cosmetics professionals. Indeed, they helpin many aspects of clinical practice by providing an efficient way for medical diagnosis, supportingbetter clinical decision-making and improving patient outcomes. In this thesis, we have beeninterested in three applications. The first one is related to the wettability measurement, especially forthe human skin. So we propose, a held-hand device that is based on the contact angle measurementto determine skin wettability. Besides, the device allows the visualization of the liquid dropletspreading in both dynamic and static modes. Moreover, it can measure the top and the left views ofthe droplet and provides the 3D droplet and the skin explored area profiles. The second applicationpermits the skin radiance measurement. For this purpose, we propose a miniaturized device havingan original method for the BRDF measurement associated with 3D profile measurement of the areastudied. As regards the third application, it is a non-invasive method for breath measurement that usesa stereovision system and a pseudo-periodic pattern. This system allows a high-resolution threedimensionaldisplacement measurement for the recording of the thoracoabdominal wall respiratorymovement. The devices developed during this research gives us a high accuracy, a good resolutionand repeatability of measurements

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Nicanfar, Hasen. "Security and privacy in smart grid context : problems and solutions." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/55190.

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In order to improve the power grid and provision the Smart Grid concept, one well-defined approach would be to utilize new information and communication technology. Live power consumption data in addition to the time base power consumption rate are essential requirements in this context. These communications are supposed to be bi-directional between consumers, providers and smart grid administrations (market, operators, etc.). However, one of the most essential requirements that should be preserved is to address communication security and privacy. There are many opportunities for adversaries to attack the smart grid system, even remotely anywhere in the world, that could result in costly issues and damages in the system, even jeopardize user privacy. In the first part of this thesis, we concentrate on improving the efficiency of security mechanism and present our tailored authentication and key management mechanisms. We propose two solutions, one for communications between home appliances and a home gateway (smart meter), while the second solution aims at communications between the home smart meter and an appropriate server located in the smart grid utility network.We then propose enhancements on key management by developing two key construction mechanisms based on the Password Authentication Key Exchange (PAKE) protocol. The first is a cluster-based group key mechanism between smart grid entities, e.g. consumers in a neighbourhood area network. The second enhancement is a multi-layer key mechanism motivated by controlling the home smart appliances using different smart grid controllers located in different layers of the controlling hierarchy network. The second part of the thesis concentrates on Privacy. In this part, we present a privacy mechanism based on enhanced network coding for communications between smart meters and utility servers via a mesh topology. Finally, we propose a privacy-aware security solution for mobile devices. For example, to support electric vehicles in buying and selling the power from and to the grid, or in case of the smart phones in the heterogeneous network (4G and/or 5G), to support handover between the access points. Applied Science, Faculty of Electrical and Computer Engineering, Department of Graduate

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Hellbe, Anton, and Gustaf Bohlin. "Evaluating IoT cloud platforms in the context of smart buildings." Thesis, Malmö universitet, Fakulteten för teknik och samhälle (TS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20027.

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Smarta byggnader är ett vanligt användningsområde för både Internet of Things (IoT)enheter och molntjänster. På senare tid har molntjänstleverantörer som Amazon, Googleoch Microsoft börjat erbjuda IoT-molnplattformar. Dessa består av en klass av tjänstersom utgör en bas för molnapplikationer som används av IoT-enheter. Idag finns det mångaolika leverantörer som tillhandahåller denna tjänsten och att välja en för en IoT-lösning ärsvårt. I denna rapport beskrivs utvecklingen av ett system som är vanligt förekommandei en smart byggnad. I denna rapport utvärderas IoT-molnplattformar för användninginom området smarta byggnader som en del av ett uppdrag från Sigma Lundinova. Förutvärderingen implementeras ett vanligt scenario i en smart byggnad som en prototyp medhjälp av två olika IoT-molnplattformar. Syftet med detta är att utvärdera och jämföra hurväl IoT-molnplattformarna stödjer utveckling av systemet beskrivet av scenariot. Genomatt implementera en prototyp insamlas underlag i form av kunskap och erfarenhet somanvänds i utvärderingen. Utvärderingen kan användas som ett hjälpmedel för att göradet lättare att välja en IoT-molnplattform när man utvecklar IoT-lösningar för smartabyggnader. Smart buildings is a common application for both Internet of Things (IoT) devices andcloud services. Recently cloud service providers such as Amazon, Google and Microsofthave started to offer IoT cloud platforms which consist of a class of services that providea base for cloud applications utilized by IoT devices. However, there are many differentproviders of IoT cloud platforms and selecting one for an IoT solution for a smart buildingis difficult. In this thesis two IoT cloud platforms are evaluated in the context of smartbuildings as part of an assignment given by Sigma Lundinova. To evaluate the IoT cloudplatforms a common smart building scenario is realized by implementing a prototype usingtwo different IoT cloud platforms. The development process makes it possible to evaluatehow well the platforms support the development of the system that the scenario describes.The evaluation is based on information and experience from the process of developing thesystem using the IoT cloud platforms. The evaluation can be used as a guidance whenselecting IoT cloud platform for an IoT solution intended for a smart building.

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La, Torre Giuseppe. "Secure Access to Context-Aware Services in a Smart City." Doctoral thesis, Università di Catania, 2015. http://hdl.handle.net/10761/3931.

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The evolution of the Web to Web 2.0 before and after the Web of Things, has resulted in a transformation of what over the years has been the role of the user. Thanks to this socio-technological evolution, we have seen the birth of the first smart cities, which will be pervaded by services produced and delivered tailored to their citizens. The thesis addresses the key issues that affect the interaction between users and context-aware services within the smart city, with particular attention to the generation, discovery and access control of these services.

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Paladini, Sofia <1995&gt. "Torino: da città-fabbrica a smart city. Analisi della candidatura al context European Capital of Smart Tourism." Master's Degree Thesis, Università Ca' Foscari Venezia, 2020. http://hdl.handle.net/10579/17561.

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Negli anni, la città di Torino ha vissuto una profonda trasformazione: da città-fabbrica, incentrata esclusivamente sulla sua industria manifatturiera, è divenuta una smart city, una città intelligente dove gli individui, consapevoli dell’importanza delle nuove tecnologie, modificano il proprio modus vivendi et operandi in base alle nuove richieste della società. Il lavoro si apre con una breve introduzione sull’evoluzione del turismo, a cui segue una descrizione dei nuovi concetti di digital business ecosystem e di smart destination, per poi avviare uno studio approfondito dell’impegno profuso dall’Unione Europea nel settore turistico. A questo proposito, viene preso in considerazione il context European Capital of Smart Tourism, proposto dalla Commissione Europea, dove la città di Torino si candida e risulta tra le dieci finaliste. Il corpo di questo lavoro è focalizzato interamente su Torino, con un’analisi dettagliata delle sue caratteristiche e potenzialità nei settori dell’accessibilità, della sostenibilità, della digitalizzazione e del patrimonio culturale legato alla creatività, i quattro parametri presi in esame dal comitato di valutazione del context. Attraverso lo studio dei tre piani strategici della città, susseguitisi dal 1998, si mette in risalto l’obiettivo primario del capoluogo piemontese: divenire una metropoli entro il 2025. Pertanto, sulla base di tale scopo, viene avviato un paragone con i vincitori del context per proporre nuove best practices da applicare all’interno dell’organizzazione cittadina nel tentativo di ottenere un riconoscimento più ampio a livello europeo. Infine, segue una breve descrizione di quei settori che sono stati messi da parte dal context in esame, per valutare un'eventuale posizione di Torino se le categorie di selezione fossero state diverse.

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Schiess, Daniel. "DECISION SUPPORT SYSTEMS: SMART WORKFLOWS : In the context of telecommunication networks." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-142489.

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This thesis, conducted at Ericsson Software Research, investigates how workflows can be made to work more dynamically. The thesis further aims at recommending how such workflows can be applied in the context of network operation centres (NOC) - the steps needed for automation of trouble ticket handling. An agent-based solution is considered, where each agent implements a workflow, ruled by conventional methods, but the agents communicate in a way allowing new agents to appear as well as allowing disconnections and reconnections without disturbing other parts of the system. Furthermore, different artificial intelligence algorithms most suited for automatic information gathering are investigated, mainly for application in troubleshooting environments during telecommunication network management. The intention of this is to provide the workflows with the tools needed for automation of routine tasks – in a way users can easily understand and follow. The perception here is that Naïve Bayesian networks are preferred, as they are easy to train, scales good and inference from a Naïve net is easy to understand in an intuitive way. Further, ZeroMQ is recommended when designing a decoupled workflow system. Detta examensarbete, som utförts vid Ericsson Software research, undersöker hur arbetsflöden kan göras mer dynamiska. Bland annat undersöks ett agentliknande system, där arbetsflöden styrs av konventionella metoder i respektive agent, men där agenterna kommunicerar på ett sätt som tillåter tillkomst och bortfall av agenter – utan att det påverkar andra delar av systemet. Vidare undersöks vilka algoritmer inom artificiell intelligens som bäst kan lämpa sig för automatisering av informationsinhämtning. Forskningen bedrivs inom telekommunikationsområdet – informationsinhämtningen är utformad att fungera i första hand i den kontexten. Syftet med detta är för att vidare förse arbetsflödena med de verktyg som krävs för att automatiskt utföra rutinuppgifter, men på ett sätt som användare enkelt kan följa och förstå. Uppfattningen här är att så kallade Naiva Bayesianska nät är att föredra, de är enkla att träna, skalar effektivt och slutledningar dragna ur ett Naivt nät är enkla att förstå på ett intuitivt sätt. Slutligen rekommenderas ZeroMQ när ett system utvecklas i syfte att implementera frikopplade arbetsflöden (decoupled workflow).

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Kalalas, Charalampos. "Enabling LTE for Control System Applications in a Smart Grid Context." Thesis, KTH, Reglerteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-150344.

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The next generation electric power system, known as Smart Grid, is expected to alleviate the energy shortage problem by exploiting renewable energy resources. The Smart Grid communication network, with its diverse structure, constitutes an indispensable component in the new power system. In terms of power industry standards, the International Electrotechnical Commission (IEC) 61850 framework is of particular note. Originally defined to cover the stringent requirements for automation within the substation, IEC 61850 is proving to be a versatile standard that can also be applied to the medium- and low-voltage networks while facilitating control applications. Long Term Evolution (LTE) appears as a remarkable candidate for supporting remote automation tasks in the electricity grid, offering low latency, high throughput and quality of service differentiation in a single radio access technology. In the context of the thesis, a performance evaluation of the integration of LTE technology with IEC 61850 communication services is carried out. A characterization of the network architecture and the performance requirements for intelligent power system management is performed and an analytical model for the scheduling framework is proposed. Emphasis is given on the development of optimal prioritization schemes and techniques in order to ensure control data scheduling in situations when LTE background traffic coexists in the network. In addition, realistic communication scenarios specifically designed to emulate real network operations are considered and extensive simulations are performed with the use of Ericsson’s radio system simulator platform. The results have demonstrated that LTE networks successfully meet the performance requirements for wide-area automation tasks within a Smart Grid context. Given the size of the LTE ecosystem, such an evolution constitutes an attractive path for future wireless communication.

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Marroquín, Cortez Roberto Enrique. "Context-aware intelligent video analysis for the management of smart buildings." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCK040/document.

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Les systèmes de vision artificielle sont aujourd'hui limités à l'extraction de données issues de ce que les caméras « voient ». Cependant, la compréhension de ce qu'elles voient peut être enrichie en associant la connaissance du contexte et la connaissance d'interprétation d'un humain.Dans ces travaux de thèse, nous proposons une approche associant des algorithmes de vision atificielle à une modélisation sémantique du contexte d'acquisition.Cette approche permet de réaliser un raisonnement sur la connaissance extraite des images par les caméras en temps réel. Ce raisonnement offre une réponse aux problèmes d'occlusion et d'erreurs de détections inhérents aux algorithmes de vision artificielle. Le système complet permet d'offrir un ensemble de services intelligents (guidage, comptage...) tout en respectant la vie privée des personnes observées. Ces travaux forment la première étape du développement d'un bâtiment intelligent qui peut automatiquement réagir et évoluer en observant l'activité de ces usagers, i.e., un bâtiment intelligent qui prend en compte les informations contextuelles.Le résultat, nommé WiseNET, est une intelligence artificielle en charge des décisions au niveau du bâtiment (qui pourrait être étendu à un groupe de bâtiments ou même a l'échelle d'un ville intelligente). Elle est aussi capable de dialoguer avec l'utilisateur ou l'administrateur humain de manière explicite To date, computer vision systems are limited to extract digital data of what the cameras "see". However, the meaning of what they observe could be greatly enhanced by environment and human-skills knowledge.In this work, we propose a new approach to cross-fertilize computer vision with contextual information, based on semantic modelization defined by an expert.This approach extracts the knowledge from images and uses it to perform real-time reasoning according to the contextual information, events of interest and logic rules. The reasoning with image knowledge allows to overcome some problems of computer vision such as occlusion and missed detections and to offer services such as people guidance and people counting. The proposed approach is the first step to develop an "all-seeing" smart building that can automatically react according to its evolving information, i.e., a context-aware smart building.The proposed framework, named WiseNET, is an artificial intelligence (AI) that is in charge of taking decisions in a smart building (which can be extended to a group of buildings or even a smart city). This AI enables the communication between the building itself and its users to be achieved by using a language understandable by humans

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Belkacem, Ilyasse. "Étude de nouvelles techniques d’interaction en situation de mobilité avec des lunettes électroniques pour le domaine de la santé." Thesis, Université de Lorraine, 2019. http://www.theses.fr/2019LORR0111/document.

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Les dispositifs mobiles tels que les smartphones, les montres connectées ou les lunettes électroniques ont révolutionné la façon dont nous interagissons. Les lunettes électroniques nous intéressent, car elles fournissent aux utilisateurs une vision simultanée des mondes physique et numérique. Cependant, l’interaction sur les lunettes électroniques n’est pas bien explorée. L’amélioration de l’interaction sur ce dispositif peut convaincre les utilisateurs à l’utiliser plus dans la vie quotidienne. Le sujet de thèse est focalisé sur l’étude et le développement de nouvelles techniques d'interaction avec les lunettes électroniques. En effet, il n'est pas possible d'interagir aussi finement en mobilité ou en situation d'urgence par rapport à une situation stable telle qu’assis devant un bureau. Notre contexte de travail se situe dans le domaine de la santé et en particulier celui du personnel médical visitant un patient dans un hôpital. Le personnel médical doit pouvoir accéder aux données du patient déjà collectées, obtenir des données physiologiques en temps réel, préparer son diagnostic et communiquer avec ses collègues. Le verrou scientifique pour la thèse ici est de trouver des solutions qui permettent au personnel médical de réaliser ces tâches de façon plus précise et moins contraignante. Le but est de rendre plus efficace le diagnostic et le partage d’informations et de faire d'un dispositif encore non maîtrisé un outil fonctionnel en milieu professionnel de la santé. Dans cette optique, les travaux de cette thèse présentent des contributions théoriques et applicatives. Nous avons tout d’abord répertorié les différents travaux effectués dans le cadre des lunettes électroniques pour le domaine de la santé, tout en indiquant le potentiel, les résultats pertinents et les limites. Nous nous sommes focalisés sur les lunettes électroniques pour afficher et manipuler les dossiers patients. D’un point de vue conceptuel, nous avons proposé un espace de conception à huit dimensions pour identifier les lacunes dans les systèmes existants et aider à la conception de nouveaux systèmes. D’un point de vue applicatif, en interaction en sortie, nous avons introduit une technique appelée K-Fisheye sur une interface à tuiles qui permet de parcourir un grand ensemble de données comme celui présent dans le dossier patient. Nous avons utilisé ensuite l’espace de conception pour porter un système existant sur les lunettes électroniques. Le prototype obtenu s’appelle mCAREglass. En interaction en entrée, nous avons exploré quatre techniques de pointage sur les lunettes électroniques avec la norme ISO 9241-411 pour sélectionner les techniques qui ne sont pas contraignantes pour naviguer dans le dossier patient. Ensuite, nous avons conçu une nouvelle technique d’entrée de texte appelé TEXTile qui permet de saisir du texte sur un tissu interactif communiquant avec les lunettes Mobile devices such as smartphones, smartwatches or smart glasses have revolutionized how we interact. We are interested in smart glasses because they have the advantage of providing a simultaneous view of both the physical and the digital worlds. However, the interaction for smart glasses is not well explored. More suitable interactions on this device can convince users to use it more in everyday life. The thesis subject is focused on the study and development of new interaction techniques with smart glasses. Indeed, it is not possible to interact so finely in mobility or in an emergency situation compared to a stable situation such as sitting in front of a desktop. The work context is in the health field and in particular a healthcare professional visiting his patient in a hospital. The professional must be able to access the patient's data already collected, obtain physiological data in real time, prepare his diagnosis and communicate with his colleagues. The scientific problem for the thesis here is to find solutions that allow him to perform these tasks in a more precise and less restrictive way. The goal is to make the diagnosis and information sharing more effective and to make a device still uncontrolled a functional system in a professional healthcare environment. In this perspective, the work of this thesis presents theoretical and applicative contributions. We first listed the various work performed in the context of smart glasses for the health field, while indicating potential, relevant results and limitations. We focused on smart glasses to visualize and manipulate patient records. From a conceptual point of view, we have proposed an eight-dimensional design space to identify gaps in existing systems and assist in the design of new systems. From an application point of view, for output interaction, we introduced a technique called K-Fisheye on a tile-based interface that allows the user to browse a large dataset like in the health record. We used the design space to adapt an existing system for the smart glasses. The prototype obtained called mCAREglass. For input interactions, we studied four pointing techniques on smart glasses. We used the ISO 9241-411 standard to select techniques easy to use for exploring the health record. Finally, we designed a new text entry technique called TEXTile by using a new interactive fabric communicating with glasses

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Arias, Jahaivis M. "Privacy in the context of Smart Home Environments : Based upon a survey of experts." Thesis, KTH, Radio Systems Laboratory (RS Lab), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-145850.

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Smart environments, particularly smart homes have become an increasingly popular topic for research and real world implementations. Despite the popularity of this topic, there is a lack of tools to enable inhabitants of smart environments to perceive which kind of data smart devices generate and to make inhabitants aware of who is accessing their personal information and the purpose for accessing this information. These issues have caused privacy concerns among inhabitants of smart environments – who would like to ensure their personal information is only utilized for their benefits, rather than being used for malicious purposes. Therefore, smart home environments motivate the need for privacy awareness tools to help inhabitants to better understand the privacy implications when their personal information is misused. To address this problem, this thesis suggests guidelines for the design of privacy awareness tools. A literature review evaluated instruments to conduct research about privacy concerns. The Internet Users’ Information Privacy Concerns (IUIPC) framework from Malhotra, Kim, and Agarwal was selected for the empirical part of this thesis project because it is one of the most reliable models developed to measure privacy concerns at the individual level. Quantitative data was gathered through a survey based on this framework. Data collected from 30 experts in the field of study was analyzed using linear regression analysis techniques and principal component analysis. These survey results lead to a set of guidelines that could guide designers and service providers as to what aspects of privacy concerns they should consider and what they should concentrate on when designing privacy awareness tools for ubiquitous computing systems, such as a smart home. Intelligenta omgivningar och framförallt smarta hem har kommit att bli ett popular forskning samt impementationsområde. Trots ämnets popularitet är det en brist på verktyg som låter personer i dessa intelligenta omgivningar att förstå vilken typ av data som genereras av de smarta apparaterna, att de förstår vem som får tillgång till deras privatinformation och syftet till att informationen används. Dessa problem leder till påverkar användarintegriteten för personerna i de intelligenta omgivningarna. Personerna vill försäkra sig om att deras privatinformation används till deras fördel och inte missbrukas. Det finns ett behov av integretetsverktyg som kan hjälpa personerna att få en bättre förståelse över hur deras integritet påverkas när deras privatinformation missbrukas. Den här rapporten syftar till att behandla detta problem genom att ta fram riktlinjer baserade på användarnas oro kring deras integritet. En litteraturstudie genomfördes för att utvärderade metoder för att genomföra forskning på användarintegritet. Ramverket Internet Users’ Information Privacy Concerns (IUIPC) från Malhotra, Kim, och Agarwal valdes eftersom det var den en av de mest pålitliga modellen för att mäta den individuella oron kring integriteten hos användarna. Kvantitativ data samlades in genom ett formulär baserat på IUIPC ramverket. Datan samlades in under den empiriska fasen utav 30 experter inom forskningsområdet. Linjär regression och principalkomponentanalys användes för att analysera datan från undersökningen. Resultatet från undersökningen diskuterades med målet att tillhandahålla riktlinjer till utvecklare och tjänsteleverantörer, om vilka integritets aspecter vilket bör övervägas samt focusera på vid utveckling av integretetsverktyg för ubika datasystem.

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Shi, Fanjuan. "A Smart Marketing Personalization Methodology Based On Real-Time Contextualisation In The Era of Big Data." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE3019/document.

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La personnalisation peut améliorer la pertinence et l'utilité des communications marketing B2C. Cependant, ce n'est pas la panacée pour tous les défis marketing B2C. Dans le but de renforcer la pertinence et l'utilité des contenus de marketing personnalisés, nous proposons une approche de personnalisation marketing contextuelle qui permet d'analyser les comportements d’achat cross-canaux, d'interpréter les intentions du consommateur, de détecter l'état cognitif des consommateurs et d'utiliser la stratégie de personnalisation appropriée pour générer et afficher des contenus marketing personnalisés. Notre approche prend en compte le volume, la variété et la variabilité des données de consommateurs dans un scénario de shopping cross-canaux. En utilisant un mécanisme d'apprentissage, notre approche permet à un système de personnalisation marketing d'apprendre de la préférence des consommateurs pour le moment et le moyen de contact afin qu'il puisse ajuster sa stratégie de personnalisation dynamiquement. Le test A / B indique que notre approche peut améliorer la pertinence et l'utilité des contenus de marketing personnalisés et la connaissance des voyages d'achat cross-canaux peuvent remodeler la façon dont les entreprises planifient, exécutent et évaluent leurs événements marketing Personalization can enhance the relevance and usefulness of B2C marketing communications. However, it is not the panacea for all the B2C marketing challenges. With an aim to further enhance the relevance and usefulness of personalized marketing contents, we propose a context-aware marketing personalization approach that can analyze cross-channel shopping behaviors, interpret consumer intentions, detect consumers cognitive state, and use the appropriate personalization strategy to generate and deliver personalized marketing contents to them. Our approach takes into account the volume, variety, and variability of consumer data in a cross-channel shopping scenario. Using a learning mechanism, our approach allows a marketing personalization system to learn from consumers’ preference for the moment and medium of contact so that it can adjust its personalization strategy dynamically. A/B test indicates that our approach can significantly enhance the relevance and usefulness of personalized marketing contents and the knowledge of cross-channel shopping journeys may reshape the way firms plan, execute, and evaluate marketing events

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Wiliem, Arnold. "Robust suspicious behaviour detection for smart surveillance systems." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/41567/1/Arnold_Wiliem_Thesis.pdf.

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Video surveillance technology, based on Closed Circuit Television (CCTV) cameras, is one of the fastest growing markets in the field of security technologies. However, the existing video surveillance systems are still not at a stage where they can be used for crime prevention. The systems rely heavily on human observers and are therefore limited by factors such as fatigue and monitoring capabilities over long periods of time. To overcome this limitation, it is necessary to have “intelligent” processes which are able to highlight the salient data and filter out normal conditions that do not pose a threat to security. In order to create such intelligent systems, an understanding of human behaviour, specifically, suspicious behaviour is required. One of the challenges in achieving this is that human behaviour can only be understood correctly in the context in which it appears. Although context has been exploited in the general computer vision domain, it has not been widely used in the automatic suspicious behaviour detection domain. So, it is essential that context has to be formulated, stored and used by the system in order to understand human behaviour. Finally, since surveillance systems could be modeled as largescale data stream systems, it is difficult to have a complete knowledge base. In this case, the systems need to not only continuously update their knowledge but also be able to retrieve the extracted information which is related to the given context. To address these issues, a context-based approach for detecting suspicious behaviour is proposed. In this approach, contextual information is exploited in order to make a better detection. The proposed approach utilises a data stream clustering algorithm in order to discover the behaviour classes and their frequency of occurrences from the incoming behaviour instances. Contextual information is then used in addition to the above information to detect suspicious behaviour. The proposed approach is able to detect observed, unobserved and contextual suspicious behaviour. Two case studies using video feeds taken from CAVIAR dataset and Z-block building, Queensland University of Technology are presented in order to test the proposed approach. From these experiments, it is shown that by using information about context, the proposed system is able to make a more accurate detection, especially those behaviours which are only suspicious in some contexts while being normal in the others. Moreover, this information give critical feedback to the system designers to refine the system. Finally, the proposed modified Clustream algorithm enables the system to both continuously update the system’s knowledge and to effectively retrieve the information learned in a given context. The outcomes from this research are: (a) A context-based framework for automatic detecting suspicious behaviour which can be used by an intelligent video surveillance in making decisions; (b) A modified Clustream data stream clustering algorithm which continuously updates the system knowledge and is able to retrieve contextually related information effectively; and (c) An update-describe approach which extends the capability of the existing human local motion features called interest points based features to the data stream environment.

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Sabagh, Angham. "GECAF : a generic and extensible framework for developing context-aware smart environments." Thesis, University of Salford, 2011. http://usir.salford.ac.uk/26884/.

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The new pervasive and context-aware computing models have resulted in the development of modern environments which are responsive to the changing needs of the people who live, work or socialise in them. These are called smart envirnments and they employ high degree of intelligence to consume and process information in order to provide services to users in accordance with their current needs. To achieve this level of intelligence, such environments collect, store, represent and interpret a vast amount of information which describes the current context of their users. Since context-aware systems differ in the way they interact with users and interpret the context of their entities and the actions they need to take, each individual system is developed in its own way with no common architecture. This fact makes the development of every context aware system a challenge. To address this issue, a new and generic framework has been developed which is based on the Pipe-and-Filter software architectural style, and can be applied to many systems. This framework uses a number of independent components that represent the usual functions of any context-aware system. These components can be configured in different arrangements to suit the various systems' requirements. The framework and architecture use a model to represent raw context information as a function of context primitives, referred to as Who, When, Where, What and How (4W1H). Historical context information is also defined and added to the model to predict some actions in the system. The framework uses XML code to represent the model and describes the sequence in which context information is being processed by the architecture's components (or filters). Moreover, a mechanism for describing interpretation rules for the purpose of context reasoning is proposed and implemented. A set of guidelines is provided for both the deployment and rule languages to help application developers in constructing and customising their own systems using various components of the new framework. To test and demonstrate the functionality of the generic architecture, a smart classroom environment has been adopted as a case study. An evaluation of the new framework has also been conducted using two methods: quantitative and case study driven evaluation. The quantitative method used information obtained from reviewing the literature which is then analysed and compared with the new framework in order to verify the completeness of the framework's components for different xiisituations. On the other hand, in the case study method the new framework has been applied in the implementation of different scenarios of well known systems. This method is used for verifying the applicability and generic nature of the framework. As an outcome, the framework is proven to be extensible with high degree of reusability and adaptability, and can be used to develop various context-aware systems.

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Serral, Asensio Estefanía. "Automating Routine Tasks in Smart Environments. A Context-aware Model-driven Approach." Doctoral thesis, Universitat Politècnica de València, 2011. http://hdl.handle.net/10251/11550.

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Ubiquitous and Pervasive computing put forth a vision where environments are enriched with devices that provide users with services to serve them in their everyday lives. The building of such environments has the final objective of automating tedious routine tasks that users must perform every day. This automation is a very desirable challenge because it can considerably reduce resource consumption and improve users' quality of life by 1) making users' lives more comfortable, eficient, and productive, and 2) helping them to stop worrying and wasting time in performing tasks that need to be done and that they do not enjoy. However, the automation of user tasks is a complicated and delicate matter because it may bother users, interfere in their goals, or even be dangerous. To avoid this, tasks must be automated in a non-intrusive way by attending to users' desires and demands. This is the main goal of this thesis, that is, to automate the routine tasks that users want the way they want them. To achieve this, we propose two models of a high level of abstraction to specify the routines to be automated. These models provide abstract concepts that facilitate the participation of end-users in the model specification. In addition, these models are designed to be machine-processable and precise-enough to be executable models. Thus, we provide a software infrastructure that is capable of automating the specified routines by directly interpreting the models at runtime. Therefore, the routines to be automated are only represented in the models. This makes the models the primary means to understand, interact with, and modify the automated routines. This considerably facilitates the evolution of the routines over time to adapt them to changes in user behaviour. Without this adaptation, the automation of the routines may not only become useless for end-users but may also become a burden on them instead of being a help in their daily life. Serral Asensio, E. (2011). Automating Routine Tasks in Smart Environments. A Context-aware Model-driven Approach [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/11550 Palancia

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Abidi, Rihab. "Smart Rοad Signs based trust management mοdels fοr cοοperative Ιntellgent Τranspοrtatiοn Systems". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMR111.

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L'augmentation de la complexité des systèmes de circulation urbaine a rendu la congestion un défi majeur, entraînant des impacts économiques, environnementaux et sociaux considérables. Les Systèmes de Transport Intelligents (STIs) sont apparus comme une solution prometteuse pour atténuer ces défis en permettant une gestion dynamique du trafic. Cependant, la fiabilité des données au sein des STIs représente un enjeu de plus en plus important. L'introduction de données erronées par des capteurs défectueux ou malveillants peut entraîner des dysfonctionnements ou des perturbations intentionnelles du système. Dans ce contexte, les modèles de gestion de la confiance revêtent une importance cruciale.La plupart des modèles de confiance existants proposent des approches centrées sur les véhicules. Cependant, la forte mobilité et la nature dynamique des environnements des STIs affectent la stabilité et la scalabilité de ces systèmes. En conséquence, la proposition de nouveaux modèles de confiance conçus spécifiquement pour les STIs, afin d'améliorer la précision, la sécurité, la scalabilité et la stabilité de la diffusion des informations sur le trafic, constitue l'objectif global de cette thèse.Tout d'abord, nous avons proposé une architecture générique pour un cadre de modèle de gestion de la confiance, exploitant les Smart Road Signs (SRSs). La conception de cette architecture repose sur une étude approfondie de l'état de l'art. Cette architecture a ensuite été développée pour proposer deux nouveaux modèles de confiance. Le premier modèle, considère les informations contextuelles et l'agrégation. De plus, ce modèle prend en compte les informations contextuelles et l'agrégation des données provenant de multi-sources pour évaluer la fiabilité des événements de trafic signalés aux SRSs et des différents nœuds du réseau. De plus, le modèle applique une évaluation de confiance à deux niveaux en combinant l'inférence Bayésienne et une approche de somme pondérée dynamique. En outre, une inférence bayésienne basée sur la prédiction a été proposée pour améliorer la précision de l'évaluation de la confiance.Par la suite, un modèle de confiance en communication a été proposé, pour compléter la contribution précédente, en utilisant des métriques de Quality of Service (QoS) pour évaluer le comportement des SRSs. Ce modèle introduit un modèle de confiance auto-organisé pour suivre les comportements des SRSs et établir des environnements stables en utilisant Dempster Shafer Theory (DST) basée sur la logique floue. En effet, nous considérons un scénario plus réaliste où tous les nœuds sont vulnérables aux attaques et aux pannes. Ainsi, l'objectif principal de ce modèle est de garantir que le système reste opérationnel même dans des environnements hostiles, en atténuant la vulnérabilité des architectures de réseau centralisées, qui est le point de défaillance unique.Les modèles proposés ont été validés par des simulations, démontrant leur efficacité dans l'identification des nœuds malveillants et la réduction des rapports de trafic erronés. Les résultats montrent que la prise en compte de l'agrégation de données provenant de multi-sources et des informations contextuelles augmente la précision de l'évaluation de la confiance. De plus, l'adoption d'un modèle basé sur l'infrastructure, exploitant une architecture décentralisée et hiérarchique, améliore l'évolutivité et la stabilité des modèles de confiance, ce qui est adapté à un tel environnement The increasing complexity of urban traffic systems has made congestion a significant challenge, leading to severe economic, environmental, and social impacts. Intelligent Transportation Systems (ITSs) have emerged as a promising solution to mitigate these challenges by enabling dynamic traffic management. However, the reliability of data within ITSs represents an increasingly significant challenge. The introduction of erroneous data by defective or malicious sensors can lead to malfunctions or intentional disruptions of the system. In this context, trust management models assume a crucial importance.Most of the existing trust models propose vehicle-centric approaches. However, the high mobility and dynamic nature of the ITS environments affects the stability and scalabity of such systems. Accordingly, proposing novel trust models designed specifically for ITSs to enhance the accuracy, security, scalability and stabilty of traffic information dissemination constitutes the overall goal of this thesis.First, we proposed a generic architecture for a trust framework, leveraging Smart Road Signs (SRSs). The conception of this architecture was built upon the output of a deep investigation of the state of the art. This framework has been, then, developed to propose two novel trust models. The first model, considers the contextual information and multi-source data aggregation to assess the trustworthiness of reported traffic events and the different nodes of the network. Additionally, the model applies a bi-level trust evaluation combining Bayesian Inference and a dynamic weighted sum approach. Furthermore, a predictive-based Baysian Inference was proposed to enhance the accuracy of trust evaluation. Thereafter, a communication trust model was proposed, to complement the previous contribution, using Quality of Service (QoS) metrics to evaluate the SRSs behaviour. This model introduces a self-organizing trust model to track the SRSs' behaviours and establishes stable environments using a fuzzy-based Dempster Shafer Theory (DST). In fact, we consider a more realistic scenario where all the nodes are vulnerable to attacks and failure. Thus, the main objective of this model is to ensure that the system remains operational even in hostile environments, by mitigating the inherent single point of failure vulnerability characteristic of centralized network architectures.\\The proposed models were validated through simulations, showing their effectiveness in identifying malicious nodes and mitigating erroneous traffic reports. The results demonstrate that considering multi-source data aggregation and context-aware information increases the accuracy of trust evaluation. Furthermore, the adoption of an infrastructure-based framework leveraging a decentralized and hierarchical architecture enhances the scalability and stability of the trust models, which is suitable for such environment

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Simons, Christof. "Context aware applications in mobile distributed systems." Aachen Shaker, 2007. http://d-nb.info/987900757/04.

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Roriz, Junior Marcos Paulino. "C3S: uma plataforma de middleware de compartilhamento de conteúdo para espaços inteligentes." Universidade Federal de Goiás, 2013. http://repositorio.bc.ufg.br/tede/handle/tede/3101.

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Submitted by Cássia Santos (cassia.bcufg@gmail.com) on 2014-09-19T12:27:42Z No. of bitstreams: 2 Dissertacao Marcos Paulino Roriz Junior.pdf: 6606924 bytes, checksum: 51f41fd9bffd47d74d5b5433034ffe62 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2014-09-19T12:58:45Z (GMT) No. of bitstreams: 2 Dissertacao Marcos Paulino Roriz Junior.pdf: 6606924 bytes, checksum: 51f41fd9bffd47d74d5b5433034ffe62 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Made available in DSpace on 2014-09-19T12:58:45Z (GMT). No. of bitstreams: 2 Dissertacao Marcos Paulino Roriz Junior.pdf: 6606924 bytes, checksum: 51f41fd9bffd47d74d5b5433034ffe62 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2013-05-17 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq According to Mark Weiser, ubiquitous computing focuses on seamlessly integrating computing tasks into people’s daily lives. Because of current technology limitations, the realization of ubiquitous computing observes a limited set of aspects of ubiquitous computing, such as, mobility and context, which are based on services that integrate the users with the resources that are present on a delimited ubiquitous environment (such as in smart spaces). Instead, we explored a different approach, in which services are used not to integrate an individual user with the environment, but to integrate the users present in the environment with one another. One way to realize this aspect is by using content sharing, first-class application dat, that serve as integration medium between users. However, due to the environment complexity and lack of middleware platforms, applications that follow this approach are repeatedly built from scratch using raw techniques. Aiming to provide an infrastructure for the development of this kind of applications, we propose Content Sharing for Smart Spaces (C3S), a middleware that offers a high-level programming model using primitives that are based on a set of content sharing semantics and ubiquitous application concepts. The primitives express a small set of behaviors, such as move, clone, and mirror, which serve as building blocks for developers to implement sharing and content ubiquity features, while the ubiquitous concepts supported by the middleware allow the manipulation of users, groups and ubiquitous applications. We validated our proposal using two different case studies that allowed us to explore these features. Our results show that our middleware provides an easier way to develop sharing-based applications compared to related work found in the literature. De acordo com Mark Weiser, a computação ubíqua se concentra na integração de maneira despercebida e sem rupturas (seamlessy) de tarefas da computação no cotidiano das pessoas. Por causa das atuais limitações tecnológicas, a realização dessa integração segue um ou mais aspectos da computação ubíqua, por exemplo, de mobilidade ou de contexto, que são baseados em serviços que integram o usuário em um ambiente ubíquo delimitado (como espaços inteligentes). Neste trabalho exploramos uma abordagem diferente, em que os serviços não são utilizados para integrar um usuário individual ao ambiente, mas são utilizados para integrar os usuários presentes no ambiente uns com os outros. Uma maneira de realizar esse aspecto é usando o compartilhamento de conteúdo, dados de primeira classe da aplicação que servem como meio de integrar os usuários. No entanto, devido à complexidade do ambiente de computação ubíqua e à falta de plataformas de middleware, aplicações que seguem esta abordagem são repetidamente construídas a partir “do zero”, usando técnicas não convencionais. Com o objetivo de fornecer uma infraestrutura para o desenvolvimento deste tipo de aplicação, propomos o Content Sharing for Smart Spaces (C3S), um middleware que oferece um modelo de programação de alto nível, usando primitivas baseadas em um conjunto de semânticas de compartilhamento de conteúdo e em conceitos de aplicações ubíquas. As primitivas expressam um conjunto de comportamentos, tais como mover, clonar, e espelhar, que servem como blocos de construção para os desenvolvedores implementarem funcionalidades de compartilhamento, enquanto que os conceitos de ubiquidade permitem a manipulação de usuários, grupos e aplicações ubíquas. A proposta foi validada por meio de dois estudos de caso que exploram esses recursos. Os resultados permitiram concluir que o middleware fornece uma maneira mais fácil de desenvolver aplicativos baseados em compartilhamento em comparação com trabalhos semelhantes encontrados na literatura.

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Collins, Michael. "Randomised shuffle and applied misinformation: An enhanced model for contact-based smart-card serial data transfer." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 1997. https://ro.ecu.edu.au/theses/877.

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Contact-based smart-cards, which comply to the International Standard IS0-7816, communicate with their associated read/write machines via a single bi-directional serial link. This link is easy to monitor with inexpensive equipment and resources, enabling captured data to be removed for later examination. In many contact-based smart-cards the logical abilities are provided by eight-bit microcontroller units (MCU) which are slow at performing effective cryptographic functions. Consequently, for expediency, much data may be transferred in plain-text across the vulnerable communications link, further easing an eavesdropper's task. Practitioners in military communications protect transmitted information by varying a link's carrier frequency in an apparently random sequence that is shared secretly between the sender and the authorised receiver. These multiplexing techniques, known as frequency or channel-hopping, serve to increase the task complexity for and/or confuse potential eavesdroppers. The study seeks to ascertain the applicability and value of protection provided by channel-hopping techniques, when realised with minimal additional overhead of microcontroller resources to the contact-based smart-card communications link. The apparent randomised shuffling of data transferred by these techniques has the potential benefit of deterring those observers who may lack the equipment and expertise to capture and decode the communicated message.

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Radu, Valentin. "Multimodal sensing for robust and energy-efficient context detection with smart mobile devices." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/25705.

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Adoption of smart mobile devices (smartphones, wearables, etc.) is rapidly growing. There are already over 2 billion smartphone users worldwide [1] and the percentage of smartphone users is expected to be over 50% in the next five years [2]. These devices feature rich sensing capabilities which allow inferences about mobile device user’s surroundings and behavior. Multiple and diverse sensors common on such mobile devices facilitate observing the environment from different perspectives, which helps to increase robustness of inferences and enables more complex context detection tasks. Though a larger number of sensing modalities can be beneficial for more accurate and wider mobile context detection, integrating these sensor streams is non-trivial. This thesis presents how multimodal sensor data can be integrated to facilitate ro- bust and energy efficient mobile context detection, considering three important and challenging detection tasks: indoor localization, indoor-outdoor detection and human activity recognition. This thesis presents three methods for multimodal sensor inte- gration, each applied for a different type of context detection task considered in this thesis. These are gradually decreasing in design complexity, starting with a solution based on an engineering approach decomposing context detection to simpler tasks and integrating these with a particle filter for indoor localization. This is followed by man- ual extraction of features from different sensors and using an adaptive machine learn- ing technique called semi-supervised learning for indoor-outdoor detection. Finally, a method using deep neural networks capable of extracting non-intuitive features di- rectly from raw sensor data is used for human activity recognition; this method also provides higher degree of generalization to other context detection tasks. Energy efficiency is an important consideration in general for battery powered mo- bile devices and context detection is no exception. In the various context detection tasks and solutions presented in this thesis, particular attention is paid to this issue by relying largely on sensors that consume low energy and on lightweight computations. Overall, the solutions presented improve on the state of the art in terms of accuracy and robustness while keeping the energy consumption low, making them practical for use on mobile devices.

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Caon, Maurizio. "Context-aware gestural interaction in the smart environments of the ubiquitous computing era." Thesis, University of Bedfordshire, 2014. http://hdl.handle.net/10547/344619.

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Technology is becoming pervasive and the current interfaces are not adequate for the interaction with the smart environments of the ubiquitous computing era. Recently, researchers have started to address this issue introducing the concept of natural user interface, which is mainly based on gestural interactions. Many issues are still open in this emerging domain and, in particular, there is a lack of common guidelines for coherent implementation of gestural interfaces. This research investigates gestural interactions between humans and smart environments. It proposes a novel framework for the high-level organization of the context information. The framework is conceived to provide the support for a novel approach using functional gestures to reduce the gesture ambiguity and the number of gestures in taxonomies and improve the usability. In order to validate this framework, a proof-of-concept has been developed. A prototype has been developed by implementing a novel method for the view-invariant recognition of deictic and dynamic gestures. Tests have been conducted to assess the gesture recognition accuracy and the usability of the interfaces developed following the proposed framework. The results show that the method provides optimal gesture recognition from very different view-points whilst the usability tests have yielded high scores. Further investigation on the context information has been performed tackling the problem of user status. It is intended as human activity and a technique based on an innovative application of electromyography is proposed. The tests show that the proposed technique has achieved good activity recognition accuracy. The context is treated also as system status. In ubiquitous computing, the system can adopt different paradigms: wearable, environmental and pervasive. A novel paradigm, called synergistic paradigm, is presented combining the advantages of the wearable and environmental paradigms. Moreover, it augments the interaction possibilities of the user and ensures better gesture recognition accuracy than with the other paradigms.

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Uhlig, Martina. "Smart clothing in the mainstream - Implications of technology in the context of clothing." Thesis, Malmö högskola, Fakulteten för kultur och samhälle (KS), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-23209.

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Smart clothing is far from being adopted by regular consumers and worn on a regular basis. Most developments can be found in specialized markets and all of the few consumer products so far have not been commercially successful. The first part of this thesis illustrates why this is the case and presents a few examples of concepts that show the potential of smart clothing in an everyday context.The second part shows my own practical research into the subject and the resulting design concept. It follows a user-centered design process with participatory design elements and ends in a concept proposing clothing that can change color and style on the go. The concept tries to support a sustainable lifestyle by slowing down fast fashion and democratizing fashion design. It makes it easy for the wearer to create her own styles and to change the style on the go to adjust to different situations or different moods. The end result of this thesis is a prototype that serves as a proof-of-concept.

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Karan, Boris. "Changes of financial system in the context of financial crisis." Master's thesis, Vysoká škola ekonomická v Praze, 2017. http://www.nusl.cz/ntk/nusl-359881.

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In this paper, we analyse the relation between financial system and financial crises. Our goal is to find how, on the one hand, changes in the financial system affect the prospects for financial crises and, on the other hand, how the occurrence of financial crises shape the core elements of the financial system. We start by defining the financial crisis from three different perspectives. After it, we present the comprehensive history of financial crises that will allow us to continue by drawing some common patterns that are universal. Universal patterns in crises give us the ground for contemplating on some universal policy responses where we again follow different approaches. Taking into account the specifics of modern times and using the young and promising economy based on the blockchain, we are asking the question is this time different?. Analysis of initial development steps in the digital, trustless world gives us the basis for drawing parallels with the reality and the history. Our results suggest that there are many similarities throughout history and between the real and digital world. Instead of providing an exact answer on the question is this time different we conclude that there is a present strong feeling of Deja vu.

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Bugani, Benedetta. "Smart service suite: smart training automatizzazione dei processi di training mediante la digitalizzazione caso IMA S.p.a." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Il progetto di tesi è incentrato sulla strutturazione di un servizio di Training per il gruppo IMA da offrire al cliente. L'offerta è caratterizzata da un percorso formativo per matricola macchina, ma la grande sfida del progetto è rappresentata dalla redazione semiautomatica dei contenuti. L'obbiettivo principale è il riuso di paragrafi, moduli, avvertenze o tabelle già redatte o provenienti da altre piattaforme aziendali. Il tutto è volto a rendere il Training un progetto corporate per tutte le divisioni di IMA, uniformando un servizio vendibile al cliente.

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Gullstrand, Simon, and Jonas Wahlfrid. "Forming Emergent Configurations in Smart Office IoT Systems." Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20170.

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In this thesis, we examine how Emergent Configurations are formed to manageThings and People for the purpose of achieving the user’s goal of repairing a coffeemachine in the dynamic environment of a smart office. We develop an architecturein the form of requirement and design artifacts as well as a realization of the GoalManager component in the Emergent Configuration Manager which is responsiblefor the forming of Emergent Configurations, using the novel Emergent ConfigurationIoT system engineering approach. To demonstrate the capability of the realizationwe developed multiple case scenarios which correspond to the context dynamicity ofa smart office environment. The results of this study introduce an architecture forthe Goal Manager component and demonstrate that the novel engineering approach,Emergent Configuration, is a feasible way of managing IoT systems in the smart officecategory.

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Wahlfrid, Jonas, and Gullstrand Simon Irengård. "Forming Emergent Configurations in Smart Office IoT Systems." Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20553.

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In this thesis, we examine how Emergent Configurations are formed to manageThings and People for the purpose of achieving the user’s goal of repairing a coffeemachine in the dynamic environment of a smart office. We develop an architecturein the form of requirement and design artifacts as well as a realization of the GoalManager component in the Emergent Configuration Manager which is responsiblefor the forming of Emergent Configurations, using the novel Emergent ConfigurationIoT system engineering approach. To demonstrate the capability of the realizationwe developed multiple case scenarios which correspond to the context dynamicity ofa smart office environment. The results of this study introduce an architecture forthe Goal Manager component and demonstrate that the novel engineering approach,Emergent Configuration, is a feasible way of managing IoT systems in the smart officecategory.

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Fonseca, Vítor Alves. "Smart Content Relocation in Content-Centric Networks." Master's thesis, 2015. http://hdl.handle.net/10316/97172.

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Dissertação de Mestrado em Engenharia Informática apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra. Information-Centric Networking (ICN) is a new networking concept devised to cope with the challenges faced by the current design of Internet communications, such as the rising number of users and the mobility of the devices. Although this concept already has some features that are relevant for current Internet usage, such as in-network caching capabilities and content replication, there are still some relevant improvements to be developed. One of the key aspects of ICN is the ability to deal with node mobility, since there are no persistent connections, making it stand out from the current Internet design. However, although ICN supports mobility, there are still no optimizations to better serve users on the move. By tracking the contents’ popularity at the users’ sources, it is possible to pre-cache related contents to the ones accessed by the users at their destination. This pre-caching allows to better serve those users when they arrive, providing reduced delays while obtaining the pre-cached contents. Content-Centric Networking (CCN) is one of the existent ICN architectures and here we propose an improvement to CCN mobility capabilities: smart relocation of contents, based on users’ movement. In this work, we design, implement and validate smart content relocation mechanisms able to integrate with the core system of CCNx to anonymously monitor data requests and relocate relevant data according to the users’ upcoming destination prior to their arrival. This will allow an improvement on the users’ service experience, namely regarding delay, when using CCN with content relocation. Information-Centric Networking (ICN) é um novo conceito de redes criado com o objectivo de ultrapassar alguns dos obstáculos encontrados pela actual forma de comunicação da Internet, tais como o crescente número de utilizadores e a mobilidade dos dispositivos. A possibilidade de fazer caching por toda a rede e de replicar conteúdos são duas das características base deste novo conceito, que tem ainda muitos aspectos onde pode ser melhorado. No ICN não existem ligações permanentes entre dois nós, ao contrário do actual conceito da Internet, o que faz com que este consiga lidar bem com a mobilidade dos nós, um dos principais aspectos que se salienta comparando à actualidade. No entanto não foram ainda desenvolvidas nenhum tipo de optimizações para melhor responder aos utilizadores que estão em movimento. Através da monitorização dos conteúdos populares entre os utilizadores, é possível fazer um pre-caching quando estes se movem, para assim melhor a sua experiência quando chegam ao destino, nomeadamente apresentando atrasos menores. Content-Centric Networking (CCN) é uma das várias arquitecturas de ICN existentes à qual é proposta uma melhoria: relocalização inteligente de conteúdos com base no deslocamento dos utilizadores. Neste trabalho desenhamos, implementamos e validamos esta proposta e a sua integração com o sistema base do CCNx através da monitorização anónima dos conteúdos e da migração dos conteúdos relevantes para o destino dos utilizadores. Esta migração permitirá uma melhoria na experiência dos utilizadores, nomeadamente em termos de atraso quando usam CCN com a relocalização dos conteúdos.

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Miche, Markus. "Content Placement Strategies for Smart Products." Phd thesis, 2015. https://tuprints.ulb.tu-darmstadt.de/4479/7/20141015phdThesisMarkusMicheFinalTuprints.pdf.

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Driven by advances in technology as well as standardisation efforts, the adoption of smart things gathers pace in various industries. Smart things range from simple objects being equipped with smart labels to comprehensive objects with embedded storage, computing, and networking capabilities. They aim at improving product operation and usage as well as at enabling functionality beyond their original purpose of use. Think of connected cars that seek for enhancing traffic safety and efficiency as well as for enabling telematic services, or industrial assets that sense and monitor their condition in order to improve maintenance operations. This thesis addresses smart products, a specific class of smart things that targets simplicity of product use by means of multi-modal and personalised product-to-user interaction. For this purpose, smart products are equipped with knowledge and knowledge-related functionality. Amongst others, this includes domain and problem-solving knowledge that is used to enable active user guidance. Given their resource limitation and potential intermittent connectivity, smart products are typically not able to locally store all content required and created across their life cycle neither can they connect to remote systems at all times for storing and / or retrieving information. Yet, in order to achieve simplicity of product use, it is essential that product-to-user interaction is not distorted by long user-perceived delays for retrieving required information or by falling back to simple interaction means, because of content being not accessible. Hence, there is a need for intelligent mechanisms that make content available when required and accessible with low latency. This thesis studies how procedural problem-solving knowledge associated with smart products can be utilised by content placement strategies, i.e., content replication and replacement strategies, to enhance content access. According to the results of the EU-funded research project SmartProducts, the thesis assumes procedural problem-solving knowledge to be modelled in the form of workflows that reflect sequences of activities and feature annotation of activity-related content needs. Also, it assumes complex-structured workflows that consist of multiple alternative branches with the actual branch(es) to be followed being determined dynamically. On this basis, the thesis contributes three workflow-based replication strategies, namely Most Probable Path (MPP), Path Assessment (PA), and Cooperative Path Assessment (CPA). These strategies utilise workflow structures to predict and pre-replicate (i.e., replicate in advance) workflow-related content needs in order to enhance query efficiency of content requests during workflow execution. While MPP, PA, and CPA pursue the same objective, they vary in the way of balancing enhancement of query efficiency with the potential risk of false pre-replication as well as in their incorporated sphere of knowledge. In order to address uncertainty in execution of branched workflows and the resulting risk of falsely pre-replicated content, the workflow-based replication strategies apply the proposed concept of transient replicas. Transient replicas are assigned gradually increasing Time To Live (TTL) intervals. While they may be persisted in case the number of requests exceeds a pre-defined threshold, they are removed in case they are not accessed within their active TTL. This avoids pre-replication wastage in the long term and limits the number of replicas to be maintained. Moreover, the replication strategy Content Class (CC) is proposed. Instead of relying on observed or predicted access patterns, this approach enables smart product applications to classify their intended content use and provides content-class-specific best effort policies to improve content organisation. Given the typical benefits of integrated content replication and replacement strategies, this thesis proposes the two replacement strategies MFR for Transient Replicas (MFRTR) and Enhanced Content Replacement (ECR) that complement the workflow-based replication strategies and CC, respectively. MFRTR extends the well-known replacement policy MFR [KRT06, KRT07] by taking into account transient replicas with lazy removal properties. Thus, transient replicas are only removed if additional storage capacity is needed for serving pending storage operations. This results in efficient utilisation of available storage capacity without increasing replacement overhead. ECR extends MFRTR by leveraging content classification for determining replacement candidates. Instead of purely relying on access frequency and recency, this approach aims at preserving location properties of content according to its classification. The value of the proposed content placement strategies is assessed with a simulation-based evaluation study that adopts the application scenario smart aircraft manufacturing developed jointly with EADS Innovation Works. This study reveals that the proposed strategies improve overall and workflow-related query efficiency by up to 28% and 62%, respectively, compared to related work. As to the knowledge of the author, the proposed content placement strategies are the first that leverage procedural problem-solving knowledge associated with smart products and enable application-affected content organisation while taking into account the challenges of smart products.

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Gummidi, Srinivasa Raghavendra Bhuvan. "Smart-RBAC." Master's thesis, 2015. http://hdl.handle.net/10362/14568.

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Generally, smart campus applications do not consider the role of the user with his/her position in a university environment, consequently irrelevant information is delivered to the users. This dissertation proposes a location-based access control model, named Smart-RBAC, extending the functionality of Role-based Access Control Model (RBAC) by including user’s location as the contextual attribute, to solve the aforementioned problem. Smart-RBAC model is designed with a focus on content delivery to the user in order to offer a feasible level of flexibility, which was missing in the existing location-based access control models. An instance of the model, derived from Liferay’s RBAC, is implemented by creating a portal application to test and validate the Smart-RBAC model. Additionally, portlet-based applications are developed to assess the suitability of the model in a smart campus environment. The evaluation of the model, based on a popular theoretical framework, demonstrates the model’s capability to achieve some security goals like “Dynamic Separation of Duty” and “Accountability”. We believe that the Smart-RBAC model will improve the existing smart campus applications since it utilizes both, role and location of the user, to deliver content.

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Graça, Afonso da Rocha. "Peer to peer multicast overlay for smart content delivery." Master's thesis, 2012. http://hdl.handle.net/10216/65632.

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Graça, Afonso da Rocha. "Peer to peer multicast overlay for smart content delivery." Dissertação, 2012. http://hdl.handle.net/10216/65632.

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Salvador, Tiago Emanuel Almeida. "Content Management Mobile Application using a Metadata Cloud Server." Master's thesis, 2015. http://hdl.handle.net/10316/97333.

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Dissertação de Mestrado em Engenharia Informática apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra. The dissertation proposed subject is an implementation of a Metadata Cloud Server, which can communicate with clients and process Metadata from given contents and show this information in state of the art and innovative ways. The contents can be stored in different kinds of services, with a focus on Dropbox for this project. These types of content are crucial in people’s lives in terms of culture and entertainment and how they are managed is important. By extracting Metadata that already exists in the contents or processing the Metadata in more complex ways like Smart Albums for Photos or Document Indexing, it is possible to give and present the content in different, more useful ways then simple lists or views. By building a complex Server application that communicates with the Metadata database and is accessible by REST API, it will be possible for any kind of client application to query the server and get the location of the content. Cloud Storage services don’t usually support smart features or fast content browsing apart from regular Operating System folder like structure. By building a system as a complement to the Cloud Storage system it is possible for the user to access their data in more state of the art ways.

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Fan, Jiamin. "SmartSharing: a content delivery network with local sharing of over-the-top devices." Thesis, 2018. https://dspace.library.uvic.ca//handle/1828/10125.

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Content delivery networks (CDNs) depend on distributed cache servers to reduce the content delivery distance and latency to end users. Nevertheless, a CDN's cache footprint is greatly limited by the high cost in deploying and maintaining large- scale cache servers. To break the limit, CDN providers adopt a new content caching strategy that allows end users to share their storage/bandwidth resources with each other. Two core questions need to answer in this CDN strategy: (1) how to incentivize end users to contribute their resources? and (2) how to facilitate transparent, secure content exchange among end users? We propose a new CDN solution, called SmartSharing, where users contribute their Over-the-top (OTT) devices as mini cache servers. With SmartSharing, an OTT device can share the content the OTT owner is downloading and in addition can cache content for neighboring OTT devices in the same area. To incentivize end users to contribute their resources, SmartSharing uses game theory and the Expectation- Maximization (EM) algorithm to determine content delivery schedule and the pricing scheme. To facilitate content trading among end users, SmartSharing uses smart contracts in Ethereum to create a transparent and safe transaction platform. We evaluate SmartSharing with real-world trace driven simulation as well as smart con- tract prototype in Ethereum using content meta-data and the derived pricing scheme. By disclosing the internal dynamics in content delivery schedule and pricing scheme and analyzing the overhead in content trading, we show that SmartSharing is an effective new CDN solution that benefi ts content providers, CDN, and end users. Graduate

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Moreira, Wanessa de Andrade. "Smart speakers and the news in Portuguese: consumption pattern and challenges for content producers." Master's thesis, 2021. http://hdl.handle.net/10071/23092.

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The voice assistants popularized by smartphones are now the driving force behind a device that is making its way into homes in recent years: smart speakers. Since 2018, these devices are available in Brazilian Portuguese. These devices are also a new platform for news distribution and consumption. How does the platform define the content that will be delivered to the user? What challenges do content producers face? How does the user access this news? To try to find the answers to these questions, we conducted a literature review, a market situation point through business reports, developed an online survey with smart speaker users and also interviewed content producers. The answers show that there is influence of algorithms and the business model. An extra challenge for Portuguese content producers is the language itself. The voice assistant systems still have difficulty understanding words and expressions in Portuguese for users. This work may be helpful for content producers, especially Portuguese-speaking ones, to find ways to reach their audience. Os assistentes de voz popularizados pelos smartphones são agora o motor de um aparelho que está entrando nas casas nos últimos anos: os smart speakers. Desde 2018, Esses equipamentos estão disponíveis em português do Brasil. Tais aparelhos são também uma nova plataforma para distribuição e consumo de notícias. Como a plataforma define o conteúdo que será entregue ao usuário? Quais os desafios que os produtores de conteúdo enfrentam? Como o usuário acessa essas notícias? Para tentar encontrar as respostas a essas questões, fizemos uma revisão de literatura, um ponto de situação do mercado através de relatórios empresariais, desenvolvemos um inquérito online com usuários de smart speakers e também entrevistamos produtores de conteúdo. As respostas mostram que há influência dos algoritmos e do modelo de negócio. Um desafio extra para os produtores de conteúdo em português é a própria língua. Os sistemas dos assistentes de voz ainda apresentam dificuldade de compreensão de palavras e expressões em português para os usuários. Este trabalho poderá ser útil para produtores de conteúdo, especialmente de língua portuguesa, encontrarem maneiras de chegar ao público.

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Dissertations / Theses on the topic 'Smart content'

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