The purpose of this study consists of gaining an understanding about Augmented Reality (AR) and if this technology can help land-surveyors to visualize cadastral parcels using an iOS app. In addition, the app is also used to get insights of what it takes for an AR system to replace 2D paper maps completely. In land-surveyors daily work, they usually bring annotated 2D paper maps to locate their assets when they do field work. However, the 2D paper map can be cumbersome to use because the map visualizes assets in 2D while the working environment for land-surveyors is in 3D. Therefore, this study presents an AR app that can visualize cadastral parcels in 3D in collaboration with a company called InfoTrader. This dissertation utilizes a qualitative methodology with a design and creation strategy as well as semi-structured interviews. To get feedback and evaluate the proposed app it was tested with professionals with experience in the land-surveying business. The findings from testing the app indicated that the app could be very useful in different scenarios. Nevertheless, to completely replace the 2D paper map, the AR system should integrate all the layers of information that the 2D map provides.

Tremendous emphasis has been placed on wireless technologies recently and it is expected that mobile communications will become an even bigger key driver for growth and innovation in the near future. The purpose of this paper is to study the securing, development, integration and implementation of an always on, always available, and accessible from anywhere secure wireless communication environment. Our analysis of the different wireless technologies reveals that a number of obstacles have to be managed before truly transparent wireless public data consumer offering is available. Our concern revolves around the technical development and implementation efforts of integrated wireless technologies enveloped with management processes of change and evolution. Wireless technologies have influenced our daily lives and will undoubtedly continue to play a significant role in the future. This dissertation focuses on the interoperation of wireless technologies, exploring, evaluating and presenting representations of secure, fully integrated wireless environments. The purpose is to find a cost effective, open, viable, sustainable consumer orientated high data speed offering which not only adheres to basic security requirements but surpasses it. By bringing the network to the subscriber we generate an “always-on” and “always-available” solution for data requirements fulfilling an ever increasing human demand for access to resources anywhere, anytime. A background literature of various wireless technologies, techniques and value added services is provided. An approach for the securing of critical content over wireless links in chapter seven provides a basis for access by position concepts presented in chapter eight. This secure approach to location-aware mobile access control is an essential security enhancement in the integration and interoperation models illustrated in chapter nine. These models, appropriately named SWARM 1 and SWARM 2 (System for Wireless and Roaming Mobility), illustrate different approaches to achieving a secure, fully coherent, consumer orientated, wireless data communications environment. / Dissertation (MSc (Computer Science))--University of Pretoria, 2003. / Computer Science / unrestricted

With the advances in wireless communication technology and advanced positioning systems, a variety of Location-Based Services (LBS) become available to the public. Mobile users can issue location-based queries to probe their surrounding environments. One important type of query in LBS is moving monitoring queries over mobile objects. Due to the high frequency in location updates and the expensive cost of continuous query processing, server computation capacity and wireless communication bandwidth are the two limiting factors for large-scale deployment of moving object database systems. To address both of the scalability factors, distributed computing has been considered. These schemes enable moving objects to participate as a peer in query processing to substantially reduce the demand on server computation, and wireless communications associated with location updates. In the first part of this dissertation, we propose a distributed framework to process moving monitoring queries over moving objects in a spatial network environment. In the second part of this dissertation, in order to reduce the communication cost, we leverage both on-demand data access and periodic broadcast to design a new hybrid distributed solution for moving monitoring queries in an open space environment. Location-based services make our daily life more convenient. However, to receive the services, one has to reveal his/her location and query information when issuing locationbased queries. This could lead to privacy breach if these personal information are possessed by some untrusted parties. In the third part of this dissertation, we introduce a new privacy protection measure called query l-diversity, and provide two cloaking algorithms to achieve both location kanonymity and query l-diversity to better protect user privacy. In the fourth part of this dissertation, we design a hybrid three-tier architecture to help reduce privacy exposure. In the fifth part of this dissertation, we propose to use Road Network Embedding technique to process privacy protected queries.

När sociala nätverk blir en del av vår vardag öppnas uppenbara möjligheter till interaktion och nätverkande på Internet med vänner, kollegor och bekanta. Samtligt som sociala nätverk erbjuder användare intressanta redskap, med många fördelar, för att kunna interagera utsätts samtidigt användares personliga integritet för risker och hot. Denna uppsats undersöker vad som oroar användare mest på Internet, värdet av en skyddad privat sfär utan insyn, varför vi delar med oss av privat information på sociala nätverk, vad kan man ta reda på utifrån den information som finns tillgänglig samt hur kan vi bära oss åt för att inte förlora vår integritet på Internet. Utöver ett stort fokus på sociala nätverk behandlas även positionsbaserade tjänster och hur dessa tjänster kan användas utan att integriteten går förlorad. Med detta i åtanke genomfördes en enkätundersökning av svenska studenters syn på integritet och medvetenhet i sociala nätverk samt deras inställning och vanor i positionsbaserade tjänster. Slutsatserna av undersökningen resulterade i reflektioner och diskussioner om vår syn på integritet och antaganden inför framtiden. / When social networking becomes a part of our everyday life opportunities for interaction and networking with friends, colleagues and other acquaintances opens up. While social networking offers and interesting approach to interacting it exposes users' personal privacy to external threats. This thesis examines elements that worries users on the Internet, the value of having a protected personal sphere, why we disclose personal information on social networks, what information can be obtained through data mining of personal profiles and how we can carry on with our online presence without losing our online privacy. Beyond the immediate focus on social networks, privacy in location-based services gets a review and a closer look into how it can be used without forfeiting privacy. With this in mind, a survey including Swedish students' views on privacy and general awareness on social networks and attitudes towards location-based services was conducted. The conclusion of the survey resulted in reflections and discussions about outlooks on privacy and assumptions about the future.

Location-based reminder systems (LBRs) are typically used to remind people to complete a to-do task at a particular location. People use their prospective memory to remember future to-do tasks. However, the current design of LBRs fails to take advantage of human prospective memory theory. In this dissertation, I propose a framework connecting human prospective memory theory with LBRs. My work applies human prospective memory into the technical design of LBRs. The goal of my work is to make the reminder work more consistently with how human memory works. Prospective memory research suggests that encoding of the location and familiarity with the location have an impact on prospective remembering. I conducted two empirical studies to test how this theoretical knowledge applies to LBRs. In one experiment, I hypothesized that if the encoding stage provides a closer match to the retrieval stage in LBRs, then location recognition and task recall should improve at retrieval time. The results indicate that providing a first-person view (street view of the desired location) at the encoding stage benefits prospective remembering the most. Prospective memory theory also suggests that the familiarity with the external cue has a significant influence on prospective remembering. In the second experiment, I hypothesized that familiarity with a location has an impact on the location recognition at the retrieval. The results show that the encoding interface is used differently for familiar and unfamiliar cities and businesses to support recognizing a target location. The findings have implications for the design of future LBRs. I designed an LBR prototype by applying these empirical research findings and conducted a usability evaluation. Future designers of LBR should consider 1) providing more support in matching the encoding stage to the eventual cue in retrieval stage and 2) involving user’s familiarity level with the places at the encoding stage to provide a better user experience. My work showed the importance of using prospective memory theory in the design of LBR systems. / Ph. D. / People use location-based mobile reminder systems to complete a to-do task at a particular location. My work studied how people memorize the locations at the reminder set up stage, as well as how they recognize the locations and remember the associated to-do tasks at the reminder retrieval stage. People see a location from a first-person view while completing a to-do task in the real life. However, current interface designs of location-based reminders do not support that. My research results contributed to the future interface design of location-based mobile reminder system. That is, future encoding interface design of location-based reminders could possibly apply a street view of the location to make the reminder more usable and more user-friendly.

This thesis is concerned with the problem of designing Mobile Location Services (MLS) - also commonly termed Location-Based Services - that meet user needs. MLS are applications that users access via a portable device such as a mobile phone. They provide services (i.e. information or other functionality) to end-users based on knowledge of the location of individuals and other entities within the environment. The market failure of many mobile services, including MLS, has been attributed in part to failing to provide `value' to the end user. This thesis reviews different theoretical approaches to help understand the notion of `value', and how value may be used to inform design (Chapter 2). Research methods are also discussed, including the particular challenges with doing `mobile' research (Chapter 3). A survey of UK consumers( Chapter4 ) demonstratesa current lack of use, and lack of awarenesso f most forms of MLS in the UK. llowever, overall positive attitudes,a nd a range of behavioural and demographic data, suggest that MLS have the potential to be successful if they can be designed to meet user needs. A qualitative study of users' travelling behaviour (Chapter 5) then demonstrates how effective mobile information delivery can provide considerable value within a dynamic, uncertain and location-varying environment. This added value is highly dependent on contextual and situated factors, including existing information sources, variances in possible outcomes and the intrinsic qualities of information provision. The thesis then focuses on a particular application domain for MLS - drivers navigating in an unfamiliar environment. A literature review (Chapter 6) investigates how drivers navigate, and what their information needs are. Three experimental studies (Chapters 7 to 9) then investigate what information adds value within a navigation context, the impact of contextual influences on driving and navigation performance, and the impact of the quality of the navigation cue on task performance. Good landmarks (such as traffic lights) are shown to add value for drivers navigating an unfamiliar route, depending on the context at particular manoeuvres. This thesis discusses( Chapter 10) how a multi-disciplinary perspectivec an help maximise the acceptance and effectiveness of MLS. 'Value' can be used to design specific services for users, based on offering new freedoms to the individual within a mobile context, employing time and location sensitivity to maximise relevance, taking into account user knowledge, existing information sources and contextual factors, and ensuring impact on real-world outcomes. In conclusion (Chapter 11), specific contributions and avenues for future work are highlighted.

Compared to the use of a traditional mobile phone, a smartphone user may experience advanced computing capability and connectivity. Internet connection along with advanced technology allows users to access the web, GPS navigation system, WIFI hotspot, etc. Today it is considerably easier for smartphone users to benefit from the global Internet connection with its extended range. A service that has expanded enormously and shaped a whole new industry in a short period of time, is location-based services (LBS). The service shows location information using coordinates providing the geographical position of a mobile device. Depending on the user’s location and preferences, mobile service providers may introduce context-related information to the user. However, LBS does not only involve opportunities, improvements, and benefits for societies. The use of digital technologies, with such spread as location-based services has obtained, may result in major integrity issues.   The aim of this qualitative investigation is to explain and describe location-based services. The purpose is to, through structured interviews, create an understanding of the users’ perception of LBS and investigate their attitudes, behavior and privacy concerns. The following understanding might be of value to application development companies regarding the comprehension of user behavior and attitudes. In turn, it could be of assistance for these companies in reaching the users in order to maximize the use of their applications.   The analysis showed that the respondents of this study are receptive to location-based services as long as it provides them with value. However, privacy concerns might intervene but are in most cases overlooked. The user’s perceived value is by the informants considered to be more important than the minor obstacles of LBS. In terms of LBS usage behavior, the respondents willingness to share location information differs among them and is based on different reasonings. The indication of user acceptance also differs. However, the informants’ perception of LBS purpose was discussed from both user and business perspective. It was concluded that it might be an indication of user acceptance since the respondents were able to recognize value deriving from location-based services. Additional LBS behavior is recognized in the process of allowing LBS access to apps.

Le concept de ”Smart Cities” a émergé au cours des dernières années pour décrire comment les investissements dans le capital humain et social, et dans les technologies de la communication (TIC) infrastructures et services électroniques peuvent maintenir la croissance durable et la qualité de vie, par une gestion judicieuse des ressources naturelles et par un gouvernement participatif. Pour nous, Smart City est un environnement réel augmenté permettant l’informatique ubiquitaire, avec web 2.0, qui est collaborative, mobile et contextuelle, les acteurs humains, ainsi que des objets connectés faisant désormais partie intégrante de l’Internet. Dans le contexte de notre projet international France-Chine sur Smart City, nous avons utilisé une approche MOCOCO (Mobilité, Contextualisation, Collaboration) à mener des travaux de recherche avec de multiples applications dans des situations de travail professionnels et à domicile, des situations d’apprentissage mobile contextuelles, ainsi que des applications de Smart City sont prises en compte - le transport, la distribution des marchandises, et des activités sportives et culturelles. Cette thèse se concentre sur les services basés sur la localisation (LBS), et Internet des Objets (IdO), qui sont deux aspects importants de Smart City. Le choix de la Gestion Dynamique des Voies de Circulation comme une étude de cas dans cette thèse est également une bonne pratique d’intégration de nouvelles technologies pour rendre la ville plus intelligente et pour rendre notre vie plus confortable. Selon Schiller et Voisard (2004), les services basés sur la localisation peuvent ˆêtre définis comme des services qui intègrent l’emplacement ou la position d’un dispositif mobile avec d’autres informations afin de fournir une valeur ajoutée à un utilisateur. L’objectif est d’utiliser la mise en œuvre IdO pour améliorer LBS, fournissant l’intelligence ambiante et d’assurer la facilité d’utilisation pour usagers dans des situations dynamiques. L’aspect théorique de nos contributions est que nous examinons la possibilité et la faisabilité de l’utilisation de l’IdO pour augmenter LBS. L’architecture de l’IdO a une capacité d’intégrer divers objets, ce qui fournit à LBS une meilleure gestion des dispositifs de géolocalisation; l’intergiciel de l’IdO, capable de faire l’abstraction des objets et la composition de services, donne la possibilité de déployer des composants de service plus intelligents et personnalisés, ainsi peut améliorer l’intergiciel de LBS. L’aspect pratique de nos contributions est que nous avons choisi une problématique de gestion dynamique des voies comme une étude de cas, validant notre approche d’utiliser l’IdO pour augmenter LBS dans une application de Smart City. L’objectif du système de gestion dynamique des voies est d’assurer une meilleure utilisation de voie de circulation par l’allocation dynamique de voies à différents types de transport. Nous avons fourni l’architecture du système du point de vue de TIC, et un environnement de simulation pour valider la conception de la solution. Nous avons également développé une preuve de concept pour valider les aspects technologiques du système. L’environnement de simulation comprend un simulateur pour simuler la fonction du système et les comportements des véhicules, un éditeur de scénario, et un générateur de trafic en tant qu’outils d’initialisation. Différentes formes de visualisation de résultats de simulation sont également prises en compte. En outre, nous avons développé un outil d’évaluation basé sur la visualisation en 3D, qui permet l’interaction entre l’utilisateur et l’outil en temps réel, pour effectuer des tests d’utilisation comme l’étude des aspects IHM, puisque les facteurs humains devraient toujours être mis en premiers dans le contexte de Smart City. [...] / The concept of “Smart Cities” has emerged during the last few years to describe how investments in human and social capital and modern Information and Communication Technologies (ICT) infrastructure and e-services fuel sustainable growth and quality of life, enabled by a wise management of natural resources and through participative government. To us, Smart City is a real augmented environment allowing ubiquitous computing, with up-to-date web 2.0, which is collaborative, mobile and contextual, human actors as well as different things (connected objects) are now an integral part of internet. In the international France-China project on Smart City we used the MOCOCO approach (Mobility, Contextualization, Collaboration) to conduct research work with multiple applications in working, learning and social situations; professional and home working situations, professional and teenager contextual mobile learning situations as well as Smart City applications are taken into account – transportation, goods distribution and local sport and cultural activities. This dissertation focuses on Location Based Services, and Internet of Things, which are both important aspects of Smart City. The choice of dynamic management of road lanes as a case study in this thesis, is also a good practice of integrating new technologies to make the city smarter and to make our life more comfortable. According to Schiller and Voisard (2004), Location Based Services (LBS) can be defined as services that integrate a mobile device’s location or position with other information so as to provide added value to a user. During recent years, LBS has evolved from simple GIS applications and positioning of emergent phone callers to more complicated, proactive, application-oriented services adapted to different users. However, heterogeneity of devices, data management and analysis, and HCI aspects are always main challenges for LBS. Our goal is to make the LBS meet the requirements of Smart City, with use of Internet of Things (IoT), integrating a certain degree of ambient intelligence. The theoretical aspect of our contributions is that we examine at component level the possibility and feasibility of using IoT to better support LBS. The ability of IoT architecture of integrating various objects gives LBS a better management of location-aware devices; the sensors can also enrich the data source of LBS. The middleware of IoT, good at objects abstraction and service composition, provides possibilities to deploy more intelligent and customized service components, thus can enhance the middleware of LBS. The practical aspect of our contributions is that we choose a dynamic lane management problem as a use case study demonstrating our approach in regard to combining LBS with IoT for a Smart City application. The goal of the dynamic lane management system is to make a better use of road lanes by dynamic allocation of lanes to different types of transportation. We provide the system architecture, user interfaces and a simulation environment to validate the solution design. We also develop a proof of concept to validate the technological aspects of the lane management system. The simulation environment of the lane management system is another important part of our contributions, it includes a core simulator to simulate the function of the system and the behaviors of the vehicles, and an editor of scenario and a generator of traffic as initialization tools. Different visualization methods of simulation results are also taken into consideration. In addition, we develop an evaluation tool which allows for real time user interaction, based on the visualization of the results of the simulator to conduct user tests for HCI aspects, as human factors should always be considered in the context of Smart City. [...]

Parce qu’ils font l’objet d’une utilisation intensive ces dernières années et que leur adoption suit une courbe similaire à celle du taux de pénétration du smartphone, les services de géolocalisation se sont rapidement et solidement ancrés dans le quotidien des individus hyperconnectés. Nous nous interrogeons dans cette recherche doctorale sur les nouvelles expériences au monde qui découlent de l’usage de ces dispositifs à travers une enquête qualitative menée auprès de 62 individus. Nos premiers résultats mettent en évidence que ces services, au même titre que d’autres technologies de l’information et de la communication, contribuent grandement à un réinvestissement des espaces et des lieux, à une relativisation des distances kilométriques et à de nouveaux rapports au temps marqués par une accélération continue et une recherche de l’immédiateté. Mais, les applications géolocalisées se voulant aujourd’hui de plus en plus socialisantes, nous avons également relevé et analysé de nouvelles stratégies de regroupement, d’évitement, de surveillance voire de contrôle entre des individus. Cela amène parfois à de nouveaux rapports de forces entre un géolocalisant et un géolocalisé, intimement liés aux problématiques de la visibilité, de la visualité et de l’anonymat dans un espace urbain hybridé où le partage de la position géographique est devenu quasiment permanent. / Because of their increasing and intensive use over the last few years, roughly similar to the smartphone penetration rate, Location-Based Services (LBS) have quickly and strongly become rooted in the everyday’s life of the hyperconnected user. We are questionning ourselves in this PhD research on the new experiences to the world brought by the use of such devices throughout a qualitative survey conducted among 62 LBS users. Our first results highlight that those LBS, like some other information and communication technologies, largely contribute in the reinvestment of space and places, while they are creating a relativization of metric distance over the temporal one and new ways to experience time defined by a continuous acceleration and a search for immediacy. But, as LBS are becoming more and more socializing, we also noticed and analyzed new grouping and dodging strategies, as well as new ways to watch over and possibly control people. This sometimes leads to new balances of power between the one who is tracking and the one who is being tracked, deeply linked to discussions over visibility, visuality and anonymity in a hybrid urban space where the share of location has become almost continuous.

<p>For the past recent years mobile developers and content providers have been aware of consumers’ engagement in online social networking. New opportunities are presented when using a mobile device as a medium for social interaction, also referred to as mobile social software. An ever growing effort aimed at various mobile design processes and applications have taken place. To achieve a widespread adoption of mobile social software amongst the main stream mobile consumer, several problem areas have to be taken into consideration, such as the technological possibilities and limitations of mobile phones, security issues regarding user privacy and the different aspects of consumers appeal for social media. This research looks into the overall situation of the current field of research and focuses on the interests in mobile social software amongst users. The study was geographically limited to Malmö, Sweden and focused on a population at the ages of 13-18.</p>