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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
91

TV white space for digital inclusion in Brazil

Nascimento, Matheus Freire e Silva do 21 July 2017 (has links)
NASCIMENTO, M. F. S. TV white space for digital inclusion in Brazil. 2017. 72 f. Dissertação (Mestrado em Engenharia de Teleinformática)–Centro de Tecnologia, Universidade Federal do Ceará, Fortaleza, 2017. / Submitted by Renato Vasconcelos (ppgeti@ufc.br) on 2017-09-08T18:02:47Z No. of bitstreams: 1 2017_dis_mfnascimento.pdf: 5688076 bytes, checksum: 1cc24af829d0f32975a0885021225eb2 (MD5) / Rejected by Marlene Sousa (mmarlene@ufc.br), reason: Prezado Matheus: Existe uma orientação para que normalizemos as dissertações e teses da UFC, em suas paginas pré-textuais e lista de referencias, pelas regras da ABNT. Por esse motivo, sugerimos consultar o modelo de template, para ajudá-lo nesta tarefa, disponível em: http://www.biblioteca.ufc.br/educacao-de-usuarios/templates/ Vamos agora as correções sempre de acordo com o template: 1. Na capa as informações relativas a hierarquia institucional deve ser em língua portuguesa, Nome da INSTITUIÇÃO; do CENTRO; do DEPARTAMENTO e do PROGRAMA DE PÓS-GRADUAÇÃO. Nesta ordem. 2. Na folha de rosto (que segue a capa) Apenas o titulo deve ficar em inglês as demais informações são em português. A partir da folha de rosto, todas as outras devem ficar em inglês. 3. A dedicatória está fora da distancia necessária até o final da folha. 4. A palavra Acknowledgments é em caixa alta, negrito e centralizada na folha. 5. A epígrafe está fora da distancia necessária até o final da folha. 6. O resumo deve vir antes do Abstract, mesmo quando o trabalho for em língua inglesa. A palavra resumo é em caixa alta, negrito e centralizada na folha. E a expressão Palavras-chave deve ser em negrito. 7. O sumário deve ser todo em negrito e nas seções com 3 dígitos (2.2.1) além de negrito deve ser em itálico. 8. Na lista de referências, veja o espaço entre as linhas que a ABNT determina. Coloque os nomes dos autores entrando pelo sobrenome, seguido do pré nome. Ex. Coelho Junior, Hélio. Se vc optar por abreviar os nomes em toda a lista eles devem ser abreviados. Se vc optar em colocar por extenso em toda e lista deve ficar por extenso para haver uma padronização. Os títulos das publicações devem ser destacadas com o uso do negrito (não use aspas). Com exceção dos artigos de periódicos que devem ser destacados o nome das revistas e não o titulo do artigo. Ao citar os artigos coloque as abreviações v. n. p. e não vol. no e pp. Após essas correções, enviaremos o nada consta por e-mail. Att. Marlene Rocha mmarlene@ufc.br on 2017-09-11T11:58:36Z (GMT) / Submitted by Renato Vasconcelos (ppgeti@ufc.br) on 2017-10-03T13:58:21Z No. of bitstreams: 1 2017_dis_mfnascimento.pdf: 5700235 bytes, checksum: b2c4f7caca78f61b98f57321ad854e92 (MD5) / Rejected by Marlene Sousa (mmarlene@ufc.br), reason: Prezado Renato: CORRIGIR O NOME DO ARQUIVO PARA: 2017_dis_mfsnascimento Prezado Matheus: Falta ainda vc corrigir de acordo com template 1. No sumário quando colocar em itálico as seções terciárias ( 3 dígitos) os algarismos também ficam em itálico. Vc só colocou em itálico o título da seção. 2. Na lista de referencias, Vc colocou os sobrenomes na ordem correta como falei, mas esqueceu que são TODOS em caixa alta. Corrigir em toda a lista. Ex. MUECK, M. Att. Marlene on 2017-10-03T18:55:29Z (GMT) / Submitted by Renato Vasconcelos (ppgeti@ufc.br) on 2017-10-06T12:47:58Z No. of bitstreams: 1 2017_dis_mfsnascimento.pdf: 5699792 bytes, checksum: fe9750751514aac9e39d3926f7adb7ed (MD5) / Approved for entry into archive by Marlene Sousa (mmarlene@ufc.br) on 2017-10-06T17:35:53Z (GMT) No. of bitstreams: 1 2017_dis_mfsnascimento.pdf: 5699792 bytes, checksum: fe9750751514aac9e39d3926f7adb7ed (MD5) / Made available in DSpace on 2017-10-06T17:35:53Z (GMT). No. of bitstreams: 1 2017_dis_mfsnascimento.pdf: 5699792 bytes, checksum: fe9750751514aac9e39d3926f7adb7ed (MD5) Previous issue date: 2017-07-21 / This work presents a technological opportunity to make efficient use of the spectrum and at the same time shows its importance to provide digital inclusion in Brazil. The method- ology is applied in a case study investigating the area of Cear ́a, a Brazilian state, where a significant amount of spectrum that can be unleashed via TV White Space exploitation is relevant to be considered, due to its geographic and economical conditions. These white spaces can fill up some holes in the state that do not present any mobile coverage and improve the telecommunication services in other areas. The technology concept, world regulation situation and possible applications using the resource are described throughout this work. The main purpose is to use TV White Spaces together with the LTE band, as a way to soften part of the poor coverage services of 3G, 4G. / Este trabalho apresenta uma oportunidade tecnológica para fazer o uso eficiente do espectro e, ao mesmo tempo, mostra sua importância para a inclusão digital no Brasil. A metodologia é aplicada em um estudo de caso que investiga a área do Ceará, estado brasileiro, onde uma quantidade significativa de espectro que pode ser desencadeada através da exploração dos Espaços em Brancos de TV é relevante a ser considerada, devido as suas condições geográficas e econômicas. Estes espaços em branco podem preencher alguns buracos no estado que não apresentam qualquer cobertura móvel e melhorar os serviços de telecomunicações em outras áreas. O conceito de tecnologia, situação de regulação mundial e possíveis aplicações usando o recurso são descritos ao longo deste trabalho. A principal finalidade é usar os Espaços em Brancos de TV juntamente com a banda do LTE, para tentar suavizar parte do péssimo serviço de cobertura das redes 3G e 4G.
92

Mobile marketing / Mobile marketing

KLEČKOVÁ, Zuzana January 2013 (has links)
The main aim of this thesis was to provide a comprehensive overview of the mobile marketing and analyze selected campaigns of Czech mobile marketing in comparison to world successful campaigns. The research contained studying of available literature about the theme to gain general knowledge about the issue. The theoretical part of the thesis contains predominantly various definitions of mobile marketing and its tools, advantages of these tools and some information about Mobile Marketing Association, new technologies and trends in the branch of mobile marketing. In the practical part five campaigns were evaluated according to available statistics and to subjective view of the author of this thesis.
93

Filtres de Kalman étendus reposant sur une variable d'erreur non linéaire avec applications à la navigation / Non-linear state error based extended Kalman filters with applications to navigation

Barrau, Axel 15 September 2015 (has links)
Cette thèse étudie l'utilisation de variables d'erreurs non linéaires dans la conception de filtres de Kalman étendus (EKF). La théorie des observateurs invariants sur les groupes de Lie sert de point de départ au développement d'un cadre plus général mais aussi plus simple, fournissant des variables d'erreur non linéaires assurant la propriété nouvelle et surprenante de suivre une équation différentielle (partiellement) linéaire. Ce résultat est mis à profit pour prouver, sous des hypothèses naturelles d'observabilité, la stabilité de l'EKF invariant (IEKF) une fois adapapté à la classe de systèmes (non-invariants) introduite. Le gain de performance remarquable par rapport à l'EKF classique est illustré par des applications à des problèmes industriels réels, réalisées en partenariat avec l'entreprise SAGEM.Dans une seconde approche, les variables d'erreurs sont étudiées en tant que processus stochastiques. Pour les observateurs convergeant globalement si les bruits sont ignorés, on montre que les ajouter conduit la variable d'erreur à converger en loi vers une distribution limite indépendante de l'initialisation. Ceci permet de choisir des gains à l'avance en optimisant la densité asymptotique. La dernière approche adoptée consiste à prendre un peu de recul vis-à-vis des groupes de Lie, et à étudier les EKF utilisant des variables d'erreur non linéaires de façon générale. Des propriété globales nouvelles sont obtenues. En particulier, on montre que ces méthodes permettent de résoudre le célèbre problème de fausse observabilité créé par l'EKF s'il est appliqué aux questions de localisation et cartographie simultanées (SLAM). / The present thesis explores the use of non-linear state errors to devise extended Kalman filters (EKFs). First we depart from the theory of invariant observers on Lie groups and propose a more general yet simpler framework allowing to obtain non-linear error variables having the novel unexpected property of being governed by a (partially) linear differential equation. This result is leveraged to ensure local stability of the invariant EKF (IEKF) under standard observability assumptions, when extended to this class of (non-invariant) systems. Real applications to some industrial problems in partnership with the company SAGEM illustrate the remarkable performance gap over the conventional EKF. A second route we investigate is to turn the noise on and consider the invariant errors as stochastic processes. Convergence in law of the error to a fixed probability distribution, independent of the initialization, is obtained if the error with noise turned off is globally convergent, which in turn allows to assess gains in advance that minimize the error's asymptotic dispersion. The last route consists in stepping back a little and exploring general EKFs (beyond the Lie group case) relying on a non-linear state error. Novel mathematical (global) properties are derived. In particular, these methods are shown to remedy the famous problem of false observability created by the EKF if applied to simultaneous localization and mapping (SLAM), which is a novel result.
94

SCALABLE AND EFFICIENT VERTICAL HANDOVER DECISION ALGORITHMS IN VEHICULAR NETWORK CONTEXTS

Márquez Barja, Johann Marcelo 23 November 2012 (has links)
A finales de los años noventa, y al comienzo del nuevo milenio, las redes inalámbricas han evolucionado bastante, pasando de ser sólo una tecnología prometedora para convertirse en un requisito para las actividades cotidianas en las sociedades desarrolladas. La infraestructura de transporte también ha evolucionado, ofreciendo comunicación a bordo para mejorar la seguridad vial y el acceso a contenidos de información y entretenimiento. Los requisitos de los usuarios finales se han hecho dependientes de la tecnología, lo que significa que sus necesidades de conectividad han aumentado debido a los diversos requisitos de las aplicaciones que se ejecutan en sus dispositivos móviles, tales como tabletas, teléfonos inteligentes, ordenadores portátiles o incluso ordenadores de abordo (On-Board Units (OBUs)) dentro de los vehículos. Para cumplir con dichos requisitos de conectividad, y teniendo en cuenta las diferentes redes inalámbricas disponibles, es necesario adoptar técnicas de Vertical Handover (VHO) para cambiar de red de forma transparente y sin necesidad de intervención del usuario. El objetivo de esta tesis es desarrollar algoritmos de decisión (Vertical Handover Decision Algorithms (VHDAs)) eficientes y escalables, optimizados para el contexto de las redes vehiculares. En ese sentido se ha propuesto, desarrollado y probado diferentes algoritmos de decisión basados en la infraestructura disponible en las actuales, y probablemente en las futuras, redes inalámbricas y redes vehiculares. Para ello se han combinado diferentes técnicas, métodos computacionales y modelos matemáticos, con el fin de garantizar una conectividad apropiada, y realizando el handover hacia las redes más adecuadas de manera a cumplir tanto con los requisitos de los usuarios como los requisitos de las aplicaciones. Con el fin de evaluar el contexto, se han utilizado diferentes herramientas para obtener información variada, como la disponibilidad de la red, el estado de la red, la geolocalización / Márquez Barja, JM. (2012). SCALABLE AND EFFICIENT VERTICAL HANDOVER DECISION ALGORITHMS IN VEHICULAR NETWORK CONTEXTS [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/17869 / Palancia
95

Lokace volajícího při tísňových hovorech VoIP / Location of VoIP caller in emergency

Mrník, Martin January 2013 (has links)
This master thesis deals with the problem of localization of the caller to the emergency line with focus on VoIP calls. It contains general description of the main active and passive geolocation methods, and explains their function. The paper analyzes market share of different VoIP clients and describes the program Skype. The focus of this work is to create an application for geolocation of the caller using analysis of VoIP transmission. The application gains IP address of the caller by capturing packets and displays his/her location on the map. The coordinates are obtained from the MaxMind GeoLite City database which been chosen by evaluating objective parameters as the most suitable for desired use.
96

A tracking framework for a dynamic non- stationary environment / Ett spårningsramverk för en dynamisk icke- stationär miljö

Ståhl, Sebastian January 2020 (has links)
As the use of unmanned aerial vehicles (UAVs) increases in popularity across the globe, their fields of application are constantly growing. This thesis researches the possibility of using a UAV to detect, track, and geolocate a target in a dynamic nonstationary environment as the seas. In this case, different projection and apparent size of the target in the captured images can lead to ambiguous assignments of coordinated. In this thesis, a framework based on a UAV, a monocular camera, a GPS receiver, and the UAV’s inertial measurement unit (IMU) is developed to perform the task of detecting, tracking and geolocating targets. An object detection model called Yolov3 was retrained to be able to detect boats in UAV footage. This model was selected due to its capabilities of detecting targets of small apparent sizes and its performance in terms of speed. A model called the kernelized correlation filter (KCF) is adopted as the visual tracking algorithm. This tracker is selected because of its performance in terms of speed and accuracy. A reinitialization of the tracker in combination with a periodic update of the tracked bounding box are implemented which resulted in improved performance of the tracker. A geolocation method is developed to continuously estimate the GPS coordinates of the target. These estimates will be used by the flight control method already developed by the stakeholder Airpelago to control the UAV. The experimental results show promising results for all models. Due to inaccurate data, the true accuracy of the geolocation method can not be determined. The average error calculated with the inaccurate data is 19.5 meters. However, an in- depth analysis of the results indicates that the true accuracy of the method is more accurate. Hence, it is assumed that the model can estimate the GPS coordinates of a target with an error significantly lower than 19.5 meters. Thus, it is concluded that it is possible to detect, track and geolocate a target in a dynamic nonstationary environment as the seas. / Användandet av drönare ökar i popularitet över hela världen vilket bidrar till att dess tillämpningsområden växer. I denna avhandling undersöks möjligheten att använda en drönare för att detektera, spåra och lokalisera ett mål i en dynamisk icke- stationär miljö som havet. Målets varierande position och storlek i bilderna leda till tvetydiga uppgifter. I denna avhandlingen utvecklas ett ramverk baserat på en drönare, en monokulär kamera, en GPS- mottagare och drönares IMU sensor för att utföra detektering, spårning samt lokalisering av målet. En objektdetekteringsmodell vid namn Yolov3 tränades för att kunna detektera båtar i bilder tagna från en drönare. Denna modell valdes på grund av dess förmåga att upptäcka små mål och dess prestanda vad gäller hastighet. En modell vars förkortning är KCF används som den visuella spårningsalgoritmen. Denna algoritm valdes på grund av dess prestanda när det gäller hastighet och precision. En återinitialisering av spårningsalgoritmen i kombination med en periodisk uppdatering av den spårade avgränsningsrutan implementeras vilket förbättrar trackerens prestanda. En lokaliseringsmetod utvecklas för att kontinuerligt uppskatta GPS- koordinaterna av målet. Dessa uppskattningar kommer att användas av en flygkontrollmetod som redan utvecklats av Airpelago för att styra drönaren. De experimentella resultaten visar lovande resultat för alla modeller. På grund av opålitlig data kan inte lokaliseringsmetodens precision fastställas med säkerhet. En djupgående analys av resultaten indikerar emellertid att metodens noggrannhet är mer exakt än det genomsnittliga felet beräknat med opålitliga data, som är 19.5 meter. Därför antas det att modellen kan uppskatta GPS- koordinaterna för ett mål med ett fel som är lägre än 19.5 meter. Således dras slutsatsen att det är möjligt att upptäcka, spåra och geolocera ett mål i en dynamisk icke- stationär miljö som havet.
97

Ex Ante Approaches for Security, Privacy, and Enforcement in Spectrum Sharing

Bahrak, Behnam 17 December 2013 (has links)
Cognitive radios (CRs) are devices that are capable of sensing the spectrum and using its free portions in an opportunistic manner. The free spectrum portions are referred to as white spaces or spectrum holes. It is widely believed that CRs are one of the key enabling technologies for realizing a new regulatory spectrum management paradigm, viz. dynamic spectrum access (DSA). CRs often employ software-defined radio (SDR) platforms that are capable of executing artificial intelligence (AI) algorithms to reconfigure their transmission/reception (TX/RX) parameters to communicate efficiently while avoiding interference with licensed (a.k.a. primary or incumbent) users and unlicensed (a.k.a. secondary or cognitive) users. When different stakeholders share a common resource, such as the case in spectrum sharing, security, privacy, and enforcement become critical considerations that affect the welfare of all stakeholders. Recent advances in radio spectrum access technologies, such as CRs, have made spectrum sharing a viable option for significantly improving spectrum utilization efficiency. However, those technologies have also contributed to exacerbating the difficult problems of security, privacy and enforcement. In this dissertation, we review some of the critical security and privacy threats that impact spectrum sharing. We also discuss ex ante (preventive) approaches which mitigate the security and privacy threats and help spectrum enforcement. / Ph. D.
98

Limits and possibilities in the geolocation of humans using multiple isotope ratios (H, O, N, C) of hair from east coast cities of the USA

Reynard, L.M., Burt, N., Koon, Hannah E.C., Tuross, N. 30 January 2020 (has links)
No / We examined multiple natural abundance isotope ratios of human hair to assess biological variability within and between geographic locations and, further, to determine how well these isotope values predict location of origin. Sampling locations feature differing seasonality and mobile populations as a robust test of the method. Serially-sampled hair from Cambridge, MA, USA, shows lower δ2 H and δ18 O variability over a one-year time course than model-predicted precipitation isotope ratios, but exhibits considerable differences between individuals. Along a ∼13° northsouth transect in the eastern USA (Brookline, MA, 42.3 ° N, College Park, MD, 39.0 ° N, and Gainesville, FL, 29.7 ° N) δ18 O in human hair shows relatively greater differences and tracks changes in drinking water isotope ratios more sensitively than δ2 H. Determining the domicile of humans using isotope ratios of hair can be confounded by differing variability in hair δ18 O and δ2 H between locations, differential incorporation of H and O into this protein and, in some cases, by tap water δ18 O and δ2 H that differ significantly from predicted precipitation values. With these caveats, randomly chosen people in Florida are separated from those in the two more northerly sites on the basis of the natural abundance isotopes of carbon, nitrogen, hydrogen, and oxygen. / This work was partially supported by the National Geospatial Agency under grant [HM1582-08-0024]. / Originally presented at the IAEA International Symposium on Isotope Hydrology: Revisiting Foundations and Exploring Frontiers, 11–15 May 2015, Vienna, Austria
99

Factors influencing the marine spatial ecology of seabirds : implications for theory, conservation and management

Grecian, William James January 2011 (has links)
Seabirds are wide-ranging apex-predators and useful bio-indicators of marine systems. Nevertheless, changes are occurring in the marine environment, and seabirds require protection from the deleterious effects of climate change, fisheries, pollution, offshore development, introduced predators and invasive species. The UK supports internationally important populations of seabirds but also has vast wind and wave resources, therefore understanding how seabirds use the marine environment is vital in order to quantify the potential consequences of further exploiting these resources. In this thesis I first describe the range of wave energy converting devices operational or in development in the UK, and review the potential threats and benefits these developments may have for marine birds. I then synthesise data from colony-based surveys with detailed information on population dynamics, foraging ecology and near-colony behaviour, to develop a projection model that identifies important at-sea areas for breeding seabirds. These models show a positive spatial correlation with one of the most intensive at-sea seabird survey datasets, and provide qualitatively similar findings to existing tracking data. This approach has the potential to identify overlap with offshore energy developments, and could be developed to suit a range of species or whole communities and provide a theoretical framework for the study of factors such as colony size regulation. The non-breeding period is a key element of the annual cycle of seabirds and conditions experienced during one season may carry-over to influence the next. Understanding behaviour throughout the annual cycle has implications for both ecological theory and conservation. Bio-logging can provide detailed information on movements away from breeding colonies, and the analysis of stable isotope ratios in body tissues can provide information on foraging during the non-breeding period. I combine these two approaches to describe the migration strategies of northern gannets Morus bassanus breeding at two colonies in the north-west Atlantic, revealing a high degree of both winter site fidelity and dietary consistency between years. These migratory strategies also have carry-over effects with consequences for both body condition and timing of arrival on the breeding grounds. Finally, I investigate the threats posed to seabirds and other marine predators during the non-breeding period by collating information on the distributions of five different species of apex predator wintering in the Northwest African upwelling region. I describe the threat of over-fishing and fisheries bycatch to marine vertebrates in this region, and highlight the need for pelagic marine protected areas to adequately protect migratory animals throughout the annual cycle. In summary, the combination of colony-based studies, bio-logging, stable isotope analysis and modelling techniques can provide a comprehensive understanding of the interactions between individuals and the marine environment over multiple spatial and temporal scales.
100

History Hunt : Raising User’s Curiosity towards Places of Historical Value using Narrative-driven, Location-based Augmented Reality

Olsson, Eric January 2017 (has links)
Today our society is greatly built on modern technologies. In most parts of the world itis a social standard to have access to a smartphone and the Internet. Being able to keepin touch with others, consuming information, or being entertained independent of placeand time are assumed standards. From an entertainment perspective, the interactivemedium has changed in the modern society, the gaming community is still growing, andfor many it is a daily routine to play some sort of game, either on the computer, tablet orsmartphone. However, new ways to engage the user in fun activities are still beingexplored. At the same time, the consumption of media and use of digital technologiesraises concerns towards health issues and time spend outside in the nature, according tocritics. Pokemon Go, a smartphone application released in 2016, presented a possiblesolution to this problem, encouraging users to go outside and catch Pokemons due to thelocation-based nature of the application. The need to physically move to certain placesin order to catch a certain Pokemon facilitated not just people’s exercise, but also socialaspects as one would likely meet other players trying to catch Pokemons. While this is astep in the right direction, I strongly believe that this technological advancement couldalso be used for other entertaining and beneficial needs to people. This thesis investigates an approach of using similar technologies compared to thoseused in Pokemon Go, combined with narrative elements and a linear task system, inorder to create an experience with the purpose to engage users with local places ofhistorical value. By using geolocation-based technology, the application guides the userto places of historical value, while augmented reality (AR) elements are used to raisethe user’s interest, and further engage them in an interactive way. The developedapplication allows the user to solve tasks, which require interaction and exploration withthe real world environment in order to gain the necessary information, related to thehistorical value of the place, to solve the task. To provide a more meaningful scenario,all this is accompanied with a complete narrative. Design and concept have beenevaluated by four experts within explorative discussions, which lead to the laterimplementation of a digital prototype. This prototype was then tested and evaluated,providing practical feedback and insights. The user interaction study, conducted withnine participants around the Linnéparken area in Växjö, suggests that the users overallfelt engaged interacting with the application and the real world environment. They alsoseemed to have developed a better understanding about the local history by gaining newinsights about the information and areas presented to them. Users also stated that duringprevious visits to the area they had not payed attention to the statues and otherinformation signs, thus resulting in a new experience visiting the area facilitated throughthe use of the developed application. The users were positive about exploring even morepoints of interest in the future if presented this way, indicating their acceptance towardsthe developed application. Some users also stated that the narrative elements made theexperience interesting and motivating. While both application design and concept wereunderstandable, the applied navigation system would need further improvements,although all users were successfully able to navigate to the real world points of interest.The AR-features seemed to increase the user’s enjoyment, while being useful at thesame time, as the AR-markers provided necessary clues considering where to findanswers to the presented questions as well as a sense of progression with the narrative. / Idag är vårt samhälle starkt byggt på modern teknik. I de flesta delar av världen är deten social standard att ha tillgång till en smartphone och Internet. Att kunna hållakontakten med andra, konsumera information, eller underhållas oberoende av plats ochtid, antas vara normer. Ur ett underhållningsperspektiv har det interaktiva medietförändrats i samhället, spelindustrin växer fortfarande och för många är det en dagligrutin att spela något slags spel, antingen på datorn, surfplattan eller smartphonen. Mennya sätt att engagera användaren i roliga aktiviteter undersöks fortfarande. Samtidigt,enligt kritiker, ger konsumtionen av media och användningen av digital teknikanledning till oro för hälsoproblem samt tid spenderad ute i naturen. Pokemon Go, ensmartphone-applikation som släpptes 2016, presenterade en möjlig lösning på dessaproblem, och uppmuntrade användarna till att gå ut för att fånga Pokemons tack vareapplikationens platsbaserade karaktär. Behovet av att fysiskt flytta sig till olika platserför att fånga Pokemons underlättad inte bara människors motionering, men bidrogockså med sociala aspekter då man sannolikt kommer möta andra spelare ute iverkligheten. Även om detta är ett steg i rätt riktning, tror jag starkt att dessa tekniskaframsteg också kan användas för andra underhållande och fördelaktiga syften. Denna studie undersöker ett sätt att använda liknande tekniker jämfört med de somanvänds i Pokemon Go, kombinerat med narrativ och ett linjärt uppdragssystem, för attskapa en upplevelse med syfte att engagera användare mot lokalhistoriska platser.Genom att använda geolocation-baserad teknik, guidar applikationen användaren tilllokalhistoriska platser, medans elementen inom förstärkt verklighet (AR) används föratt höja användarens intresse och engagera dem på ett interaktivt sätt. Den utveckladeapplikationen låter användaren lösa uppgifter som kräver interaktion och utforskning avden verkliga världsmiljön, för att få den information som krävs för att lösa uppgiften.För att ge ett mer meningsfullt scenario kompletteras detta med ett narrativ. Design ochkoncept har utvärderats av fyra experter genom utforskande diskussioner, vilket senareledde till implementering av en digital prototyp. Denna prototyp testades ochutvärderades mot användare, vilket gav feedback och insikter. Interaktionsstudier medanvändare, vilken genomfördes med nio deltagare vid Linnéparken i Växjö, föreslår attanvändarna i allmänhet kände sig engagerade under interaktion med applikationen ochvärldsmiljön. De verkade också ha utvecklat en bättre förståelse om lokalhistoriagenom att få nya insikter om informationen som presenteras för dem. Användareuppgav också att de under tidigare besök i området inte hade uppmärksammat statyernaeller andra informationsskyltar, vilket resulterade i en ny upplevelse genom att besökaområdet tack vare applikationen. Användarna var positiva till att utforska flerintressanta platser i framtiden om de presenterades på detta sätt, vilket indikerar derasacceptans mot den utvecklade applikationen. Vissa användare uppgav också att denarrativa elementen gjorde upplevelsen intressant och motiverande. Medans bådeapplikationsdesign och koncept var förståeligt skulle det tillämpadenavigationssystemet behöva ytterligare förbättringar, även om användarna lyckadesnavigera till platserna i den verkliga världen. AR-funktionen verkade öka användarensnöje samtidigt som den var användbar eftersom att AR-markörerna tillhandahöllnödvändiga ledtrådar åt vart användaren kunde hitta svaren på presenterade frågor.

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