To see the other types of publications on this topic, follow the link: Pervasive Mobile Computing.
Dissertations / Theses on the topic 'Pervasive Mobile Computing'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 39 dissertations / theses for your research on the topic 'Pervasive Mobile Computing.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Abukmail, Ahmed Ahed. "Pervasive computing approach to energy management." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0013060.
Full text
2
周彧 and Yuk Chow. "A light-weight mobile code system for pervasive computing." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31227296.
Full text
3
Siu, Po-lam Pauline. "Context-aware state management for supporting mobility in a pervasive environment." Click to view the E-thesis via HKUTO, 2004. http://sunzi.lib.hku.hk/hkuto/record/B3147858X.
Full text
4
Siu, Po-lam Pauline, and 蕭寶琳. "Context-aware state management for supporting mobility in a pervasive environment." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B3147858X.
Full text
5
Nordstedt, David Roger. "MicroJini a service discovery and delivery infrastructure for pervasive computing /." [Gainesville, Fla.] : University of Florida, 2001. http://purl.fcla.edu/fcla/etd/UFE0000338.
Full textAbstract:
Thesis (M.E.)--University of Florida, 2001.<br>Title from title page of source document. Document formatted into pages; contains xi, 76 p.; also contains graphics. Includes vita. Includes bibliographical references.
6
Koukoumpsetsos, Kyriakos. "MoDeS : a mobile-agent system for improving availability and data-traffic on pervasive computing." Thesis, University of Surrey, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402873.
Full text
7
Hansen, Jarle. "An investigation of smartphone applications : exploring usability aspects related to wireless personal area networks, context-awareness, and remote information access." Thesis, Brunel University, 2012. http://bura.brunel.ac.uk/handle/2438/6518.
Full textAbstract:
In this thesis we look into usability in the context of smartphone applications. We selected three research areas to investigate, namely Wireless Personal Area Networks, Context-awareness, and Remote Information Access. These areas are investigated through a series of experiments, which focuses on important aspects of usability within software applications. Additionally, we mainly use smartphone devices in the experiments. In experiment 1, Multi-Platform Bluetooth Remote Control, we investigated Wireless Personal Area Networks. Specifically, we implemented a system consisting of two clients, which were created for Java ME and Windows Mobile, and integrated with a server application installed on a Bluetooth-enabled laptop. For experiments 2 and 3, Context-aware Meeting Room and PainDroid: an Android Application for Pain Management, we looked closely at the research area of Contextawareness. The Context-aware Meeting Room was created to automatically send meeting participants useful meeting notes during presentations. In experiment 3, we investigated the use of on-device sensors for the Android platform, providing an additional input mechanism for a pain management application, where the accelerometer and magnetometer were used. Finally, the last research area we investigated was Remote Information Access, where we conducted experiment 4, Customised Android Home Screen. We created a system that integrated both a cloud-based server application and a mobile client running on the Android platform. We used the cloud-computing platform to provide context management features, such as the ability to store the user configuration that was automatically pushed to the mobile devices.
8
Girma, Berhe Hagos Brunie Lionel Pierson Jean-Marc. "Accès et adaptation de contenus multimédia pour les systèmes pervasifs ccess and adaptation of multimedia content for pervasive systems /." Villeurbanne : Doc'INSA, 2006. http://docinsa.insa-lyon.fr/these/pont.php?id=girma.
Full text
9
Ben, Mabrouk Nebil. "QoS-aware Service-Oriented Middleware for Pervasive Environments." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00786466.
Full textAbstract:
Pervasive computing is an intuitive evolution of computing paradigms driven by the wide adoption of mobile devices and wireless networks. It introduces a novel way to support users in their everyday life based on open and dynamic environments populated with unobtrusive services able to perform user tasks on the fly. Nevertheless, supporting user tasks from a functional point of view is not enough to gain the user's satisfaction. Users instead require that their tasks meet a certain Quality of Service (QoS) level. QoS is indeed an inherent and primary requisite of users going along with their required tasks. In the context of pervasive environments, fulfilling user tasks while delivering satisfactory QoS brings about several challenges that are mainly due to the openness, dynamics, and limited underlying resources of these environments. These challenges are mainly about (i) the lack of common QoS understanding among users and service providers, (ii) determining and integra- ting, on the fly, the services available in the environment and able to fulfill the functional and QoS requirements of users, and (iii) adapting the provided services at run-time to cope with QoS fluctuations and ensure meeting user requirements. To cope with the aforementioned issues, we opt for a middleware-based solution. Middle- ware represents indeed the appropriate software system to deal with common concerns of user applications such as QoS. In particular, we opt for a specific kind of middleware, viz., Ser- vice Oriented Middleware (SOM). SOM can leverage middleware technologies and the Service Oriented Computing (SOC) paradigm to enable pervasive environments as dynamic service en- vironments. Particularly, SOM can provide middleware services that allow for supporting QoS of user applications offered by pervasive environments. This thesis presents a QoS-aware service-oriented middleware for pervasive environments. The main contributions of this middleware are : (1) a semantic end-to-end QoS model that enables shared understanding of QoS in pervasive environments, (2) an efficient QoS-aware service composition approach allowing to build service compositions able to fulfill the user functional and QoS requirements, and (3) a QoS-driven adaptation approach to cope with QoS fluctuations during the execution of service compositions. The proposed contributions are implemented within a middleware platform called QASOM and their efficiency is validated based on experimental results.
10
Dragoi, Octavian Andrei. "The Continuum Architecture: Towards Enabling Chaotic Ubiquitous Computing." Thesis, University of Waterloo, 2005. http://hdl.handle.net/10012/1158.
Full textAbstract:
Interactions in the style of the ubiquitous computing paradigm are possible today, but only in handcrafted environments within one administrative and technological realm. This thesis describes an architecture (called Continuum), a design that realises the architecture, and a proof-of-concept implementation that brings ubiquitous computing to chaotic environments. Essentially, Continuum enables an ecology at the edge of the network, between users, competing service providers from overlapping administrative domains, competing internet service providers, content providers, and software developers that want to add value to the user experience. Continuum makes the ubiquitous computing functionality orthogonal to other application logic. Existing web applications are augmented for ubiquitous computing with functionality that is dynamically compiled and injected by a middleware proxy into the web pages requested by a web browser at the user?s mobile device. This enables adaptability to environment variability, manageability without user involvement, and expansibility without changes to the mobile. The middleware manipulates self-contained software units with precise functionality (called <i>frames</i>), which help the user interact with contextual services in conjunction with the data to which they are attached. The middleware and frame design explicitly incorporates the possibility of discrepancies between the assumptions of ubiquitous-computing software developers and field realities: multiple administrative domains, unavailable service, unavailable software, and missing contextual information. A framework for discovery and authorisation addresses the chaos inherent to the paradigm through the notion of <i>role assertions</i> acquired dynamically by the user. Each assertion represents service access credentials and contains bootstrapping points for service discovery on behalf of the holding user. A proof-of-concept prototype validates the design, and implements several frames that demonstrate general functionality, including driving discovery queries over multiple service discovery protocols and making equivalences between service types, across discovery protocols.
11
PALMEIRA, FILHO Antonio Sá Fernandes. "SNU: um framework para o desenvolvimento de aplicações voltadas às redes ad-hoc espontâneas." Universidade Federal do Maranhão, 2007. http://tedebc.ufma.br:8080/jspui/handle/tede/1819.
Full textAbstract:
Submitted by Rosivalda Pereira (mrs.pereira@ufma.br) on 2017-08-14T18:44:38Z
No. of bitstreams: 1
AntonioPalmeiraFilho.pdf: 3164841 bytes, checksum: 23d94c0539749a601438bcd53f1d7384 (MD5)<br>Made available in DSpace on 2017-08-14T18:44:38Z (GMT). No. of bitstreams: 1
AntonioPalmeiraFilho.pdf: 3164841 bytes, checksum: 23d94c0539749a601438bcd53f1d7384 (MD5)
Previous issue date: 2007-11-09<br>Mobile devices have evolved from simple personal digital assistants or cell phones to cutting-edge personal digital assistants, aliasing or combining on-the- y video/audio acquisition and data processing. But giving the best usage to all this new technology in our day-by-day tasks still is challenging. The large variety of devices, the increasing need for ubiquitous mobile services and the network heterogeneity are just some problems developers may nd when deploying for the mobile world. With the popularization of the wireless network technologies, we can nd devices capable of establishing network connections using di erent technologies. Infrastructured networks support good bandwidth with low latency, but they demand an infrastructure of access points that are not available at any place. On the other hand, ad-hoc networks don't need an infrastructure and the communication is done in a peer-to-peer maner. The ad-hoc networks play an important rule in the environments made by mobile devices since they ensure high availability. Spontaneous networks are ad-hoc networks formed occasionally by users that wish to engage in some collaborative task, like a le sharing. In this work we describe a framework to help developers to easily create applications capable of managing and sharing digital content within groups of people in a spontaneous short-range ad-hoc network. We describe the framework architecture, its services and their relationship, as well as some usage scenarios, applications and related works.<br>Dispositivos móveis evoluíram de simples agendas, calendários ou telefones celulares para modernos assistentes pessoais, capazes de armazenar e processar áudio e vídeo em tempo real. Contudo, dar a melhor utilidade a esta tecnologia em nossas tarefas do dia-a-dia ainda é um desafio. A grande variedade de dispositivos, a crescente necessidade de serviços móveis pervasivos e a heterogeneidade das tecnologias de rede são apenas alguns exemplos dos problemas possivelmente encontrados pelos desenvolvedores ao produzir software para o mundo móvel. Com a popularização das tecnologias de rede, é cada vez mais comum encontrarmos dispositivos móveis capazes de estabelecer conexões através de diferentes tecnologias. Redes infra-estruturadas disponibilizam boas larguras de banda e baixa latência, porém necessitam de uma infra-estrutura de pontos de acesso nem sempre disponível. Por outro lado, as redes ad-hoc não necessitam de infra-estrutura e a comunicação entre seus nós é feita ponto a ponto, razão pela qual desempenham um importante papel nos ambientes formados por dispositivos móveis. Redes espontâneas são redes ad-hoc formadas ao acaso por usuários que desejam participar de alguma tarefa colaborativa, como o compartilhamento de arquivos. Neste trabalho apresentamos um framework cujo objetivo é ajudar os desenvolvedores a criar facilmente aplicações capazes de gerenciar e compartilhar conteúdo digital com grupos de usuários em redes ad-hoc espontâneas de curto alcance. São descritos a arquitetura do framework proposto, seus serviços e relacionamentos, assim como alguns cenários de uso, aplicações e trabalhos relacionados.
12
Cavdar, Davut. "A Certificate Based Authentication Control Model Using Smart Mobile Devices For Ubiquitous Computing Environments." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613682/index.pdf.
Full textAbstract:
In this thesis work, a certificate based authentication model supported by mobile devices is provided for ubiquitous computing environments. The model primarily aims to create an infrastructure for controlling and regulating access requests through mobile devices to local resources and services. The model also allows users from different domains to use local resources and services within the scope of agreements between domains. In addition to conceptual description of the model, a real prototype implementation is developed and successful application of the model is demonstrated. Within the prototype implementation, a mobile application is developed for access requests and sensors are used as representative local resources. Sample cases applied on the prototype demonstrate applicability and feasibility of the model.
13
Felice, Mirko. "Sviluppo di un'app mobile per la gestione di opere in contesti museali attraverso NFC." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21858/.
Full textAbstract:
L'obiettivo di questo volume di tesi è di presentare il contesto e l'implementazione del progetto di tesi che riguarda lo sviluppo di un'applicazione mobile che permette la gestione facilitata di opere d'arte all'interno di un contesto museale. Il volume tratta innanzitutto i concetti di Pervasive Computing e Smart Environment, per poi andare a delineare dettagliatamente il cosiddetto IoT e i sensori che lo caratterizzano, con particolare attenzione ai sensori di prossimità ed in particolare alla tecnologia NFC. Successivamente, verranno presentate le tecnologie utilizzate per sviluppare l'app e i requisiti del sistema. Il volume si conclude poi con la descrizione dettagliata dell'applicazione mobile sviluppata. In particolare, l'applicazione, sviluppata in Android, riguarda la gestione di opere d'arte in un contesto museale e ha lo scopo di semplificare le operazioni che gli utenti finali andranno ad eseguire in loco. Il progetto prevede la visualizzazione e l'amministrazione dei pezzi d'arte contenuti nel museo: il proposito è infatti automatizzare e facilitare i flussi lavorativi degli operatori museali in relazione al monitoraggio quotidiano dello stato delle opere. In particolare, l'applicazione è stata sviluppata per essere utilizzata sia dal personale addetto alla custodia del patrimonio museale, sia dai conservatori incaricati alla conservazione. La particolarità di quest'applicazione è l'uso della tecnologia NFC. Essa infatti, tramite apposito modulo hardware, permette di ricercare e visualizzare i dettagli dell'opera tramite tag preconfigurati.
14
Martinez, David. "Introducing location related aspects to mobile multimedia environments." Thesis, Växjö University, School of Mathematics and Systems Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-1020.
Full textAbstract:
<p>This work describes a design of a multimedia content delivery system based on context, to provide multimedia information and other services according to the user location and his preferences. It focuses on mobility and the problem of different coherent and cohesive presentations depending on the available resources of the presentation environment.</p>
15
Li, Ming. "User-Centric Security and Privacy Mechanisms in Untrusted Networking and Computing Environments." Digital WPI, 2011. https://digitalcommons.wpi.edu/etd-dissertations/323.
Full textAbstract:
"Our modern society is increasingly relying on the collection, processing, and sharing of digital information. There are two fundamental trends: (1) Enabled by the rapid developments in sensor, wireless, and networking technologies, communication and networking are becoming more and more pervasive and ad hoc. (2) Driven by the explosive growth of hardware and software capabilities, computation power is becoming a public utility and information is often stored in centralized servers which facilitate ubiquitous access and sharing. Many emerging platforms and systems hinge on both dimensions, such as E-healthcare and Smart Grid. However, the majority information handled by these critical systems is usually sensitive and of high value, while various security breaches could compromise the social welfare of these systems. Thus there is an urgent need to develop security and privacy mechanisms to protect the authenticity, integrity and confidentiality of the collected data, and to control the disclosure of private information. In achieving that, two unique challenges arise: (1) There lacks centralized trusted parties in pervasive networking; (2) The remote data servers tend not to be trusted by system users in handling their data. They make existing security solutions developed for traditional networked information systems unsuitable. To this end, in this dissertation we propose a series of user-centric security and privacy mechanisms that resolve these challenging issues in untrusted network and computing environments, spanning wireless body area networks (WBAN), mobile social networks (MSN), and cloud computing. The main contributions of this dissertation are fourfold. First, we propose a secure ad hoc trust initialization protocol for WBAN, without relying on any pre-established security context among nodes, while defending against a powerful wireless attacker that may or may not compromise sensor nodes. The protocol is highly usable for a human user. Second, we present novel schemes for sharing sensitive information among distributed mobile hosts in MSN which preserves user privacy, where the users neither need to fully trust each other nor rely on any central trusted party. Third, to realize owner-controlled sharing of sensitive data stored on untrusted servers, we put forward a data access control framework using Multi-Authority Attribute-Based Encryption (ABE), that supports scalable fine-grained access and on-demand user revocation, and is free of key-escrow. Finally, we propose mechanisms for authorized keyword search over encrypted data on untrusted servers, with efficient multi-dimensional range, subset and equality query capabilities, and with enhanced search privacy. The common characteristic of our contributions is they minimize the extent of trust that users must place in the corresponding network or computing environments, in a way that is user-centric, i.e., favoring individual owners/users."
16
Grotti, Simone. "Mobile CSCW e sincronizzazione dati per il soccorso in emergenza: un caso di studio." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10499/.
Full textAbstract:
L'obiettivo principale di questa tesi è quello di approfondire il tema della comunicazione e sincronizzazione dati nel contesto di uno specifico caso di studio di sistema informatico a supporto del lavoro cooperativo per il soccorso in emergenza: a partire dai requisiti del caso applicativo, secondo cui agli operatori deve essere possibile utilizzare il sistema anche a fronte di disconnessioni dei propri dispositivi mobili, emerge infatti la necessità di un middleware a cui il livello applicativo demandi le funzionalità di sincronizzare le informazioni prodotte durante le operazioni, in modo da promuovere uno scambio di informazioni che migliori e supporti l'azione del singolo e conseguentemente del team.
Quindi, dopo aver introdotto la tematica ed analizzato il caso di studio da affrontare, viene descritta l'esplorazione del panorama tecnologico volta alla ricerca di strumenti o approcci che possano mitigare la complessità nella realizzazione di questa funzionalità.
Nel panorama tecnologico considerato, comprendente framework per servizi web, MOM e database, uno strumento di particolare interesse è stato individuato in CouchDB, un database NoSQL, grazie alle sue funzionalità di replica e sincronizzazione e alla presenza di una libreria per lo sviluppo su dispositivi mobili: su di esso è stata effettuata una breve fase di sperimentazione volta a saggiarne in maniera più concreta le potenzialità anche in relazione alla valutazione di fattibilità per il caso applicativo considerato.
17
Spikol, Daniel. "Playing and Learning Across Locations: : Indentifying Factors for the Design of Collaborative Mobile Learning." Licentiate thesis, Växjö University, School of Mathematics and Systems Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-3698.
Full textAbstract:
<p>The research presented in this thesis investigates the design challenges associated with the development and use of mobile applications and tools for supporting collaboration in educational activities. These technologies provide new opportunities to promote and enhance collaboration by engaging learners in a variety of activities across different places and contexts. A basic challenge is to identify how to design and deploy mobile tools and services that could be used to support collaboration in different kinds of settings. There is a need to investigate how to design collaborative learning processes and to support flexible educational activities that take advantage of mobility. The main research question that I focus on is the identification of factors that influence the design of mobile collaborative learning.</p><p>The theoretical foundations that guide my work rely on the concepts behind computer supported collaborative learning and design-based research. These ideas are presented at the beginning of this thesis and provide the basis for developing an initial framework for understanding mobile collaboration. The empirical results from three different projects conducted as part of my efforts at the Center for Learning and Knowledge Technologies at Växjö University are presented and analyzed. These results are based on a collection of papers that have been published in two refereed international conference proceedings, a journal paper, and a book chapter. The educational activities and technological support have been developed in accordance with a grounded theoretical framework. The thesis ends by discussing those factors, which have been identified as having a significant influence when it comes to the design and support of mobile collaborative learning.</p><p>The findings presented in this thesis indicate that mobility changes the contexts of learning and modes of collaboration, requiring different design approaches than those used in traditional system development to support teaching and learning. The major conclusion of these efforts is that the learners’ creations, actions, sharing of experiences and reflections are key factors to consider when designing mobile collaborative activities in learning. The results additionally point to the benefit of directly involving the learners in the design process by connecting them to the iterative cycles of interaction design and research.</p>
18
Bracci, Elia. "Progettazione e sviluppo di un sistema mobile basato su android e servizi rest in un progetto di internet of things per il tracciamento e monitoraggio di imbarcazioni." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14268/.
Full textAbstract:
La tesi riguarda la progettazione e lo sviluppo di un'applicazione Android e un servizio RESTful per il tracciamento e il monitoraggio di imbarcazioni nel mondo della nautica. Questi due sottosistemi sono integrati all'interno di un sistema chiamato OneMile. Esso è strettamente collegato agli ambiti del pervasive computing e dell'Internet of Things.
19
Karmouch, Eric. "Dynamic Composition and Management of Virtual Devices for Ad Hoc Multimedia Service Delivery." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19865.
Full textAbstract:
Pervasive computing implies the invisibility of the technology involved in providing ubiquity, such that technology is integrated into the environment and non-intrusive. In such a manner, computing and networking resources become diffused into physical environments, enabling users to exploit their provided functionalities such that functionality is distributed, enabling it to be controlled, monitored, managed, and extended beyond what it was initially designed to do. Moreover, computer awareness moves towards user-centricity, whereby systems seamlessly adapt to the characteristics, preferences, and current situations of users and their respective surrounding environments. Users exploit such functionalities in the form of a virtual device, whereby a collection of heterogeneous devices in the vicinity of the user are behaving as one single homogeneous device for the benefit of the user in solving some given task.
This dissertation investigates the problem of dynamic composition and management of virtual devices for ad hoc multimedia service delivery and proposes an autonomous policy driven framework for virtual device management. The framework consists of a hierarchical structure of distributed elements, including autonomic elements, all working towards the self-management of virtual devices. The research presented in this dissertation addresses the functionalities of these components.
More specifically, contributions are made towards the autonomous management of virtual devices, moving away from infrastructure based schemes with heavy user involvement to decentralized and zero touch (i.e., no user involvement) solutions. In doing so, the components and methodology behind a policy-driven autonomous framework for the dynamic discovery, selection, and composition of multimodal multi-device services are presented. The framework operates in an ad hoc network setting and introduces a Service Overlay Network (SON) based definition of a virtual device.
Furthermore, device and service discovery, composition, integration, and adaptation schemes are designed for Mobile Ad hoc Network Environments (MANETs) enabling users to generate, on-the-fly, complex strong specific systems, embedding in a distributed manner, QoS models providing compositions that form the best possible virtual device at the time of need.
Experimental studies are presented to demonstrate the performance of the proposed schemes.
20
Bonatto, Daniel Torres. "HNS: uma solução para suporte à execução distribuída considerando aspectos da pervasividade." Universidade do Vale do Rio dos Sinos, 2006. http://www.repositorio.jesuita.org.br/handle/UNISINOS/5210.
Full textAbstract:
Submitted by Silvana Teresinha Dornelles Studzinski (sstudzinski) on 2016-04-29T13:58:24Z
No. of bitstreams: 1
Daniel Torres Bonatto_.pdf: 3486011 bytes, checksum: e32338e4597614de8de1a25e68695054 (MD5)<br>Made available in DSpace on 2016-04-29T13:58:24Z (GMT). No. of bitstreams: 1
Daniel Torres Bonatto_.pdf: 3486011 bytes, checksum: e32338e4597614de8de1a25e68695054 (MD5)
Previous issue date: 2006<br>HP - Hewlett-Packard Brasil Ltda<br>Nos últimos anos, tem-se observado a crescente evolução dos dispositivos portáteis,
bem como de diversas novas tecnologias de comunicação sem fio. Esse avanço tecnológico propicia o surgimento de um cenário ideal para o desenvolvimento de ambientes que suportam a criação de aplicações pervasivas. Porém, um ambiente altamente dinâmico como este demanda a utilização de abstrações mais poderosas do que as existentes. O Holoparadigma propõe uma nova abstração, criada pensando em aplicações distribuídas executando em ambientes móveis. Nesta dissertação é apresentada a proposta para uma arquitetura de suporte a aplicações pervasivas para o Holoparadigma. Esta proposta estende as funcionalidades da HoloVM e define novos serviços para atender às demandas da computação pervasiva. Dentre estes serviços é definido um como sendo essencial para a arquitetura, que é o suporte à distribuição, composto por um servidor de nomes e uma camada para possibilitar a execução distribuída e transparente de programas. Para o modelo do servidor de nomes é definida uma estratégia de distribuição escalável e tolerante a falhas, conforme os princípios da computação pervasiva. Além disso, são mostrados resultados de experimentos realizados com este suporte.<br>Over the last few years, we have observed the growing evolution of portable devices,
such as new technologies for wireless communication. This technological advance makes possible the emergence of an ideal scenery for developing environments supporting the creation of pervasive applications. However, such a highly dynamic environment demands the use of more powerful abstractions than those available today. Holoparadigm proposes a new form of abstraction, created aiming distributed applications running on mobile environments. In the present dissertation, we propose an architecture for Holoparadigmdesigned to support pervasive applications. This proposal extends the functionalities of HoloVM and defines new services to respond to the demand of pervasive computing. Among those services, one is defined as essential to the architecture, the support for distribution, which is composed by a name server and a layer for supporting distributed and transparent execution of programs. For the name server, a scalable and fault tolerant distribution strategy is defined, following the principles of pervasive computing. Furthermore, we show the results of experiments performed using this support.
21
Sapignoli, Michele. "Sistema Bluetooth-based di remarketing pervasivo." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016.
Find full textAbstract:
Il progetto si propone di dotare la realta fisica di un estensione digitale.
Sensori, attuatori e tecnologie embedded hanno cambiato il nostro modo di lavorare, allenarci e seguire i nostri interessi. Il mondo del commercio non e rimasto a guardare ed ha dovuto adattarsi alla metamorfosi high-tech del settore dei servizi.
Il sistema proposto costituisce un promotore per acquisti ed un raccoglitore intelligente di abitudini sullo shopping e si compone di applicazione mobile, microcontroller e web server.
Caratteristica prima e principale del progetto e sicuramente la pervasivita. All'utente ed utilizzatore dell'app dello shopping center deve essere certamente resa nota la collaborazione al fine di raccogliere dati statistici sulle sue abitudini, tuttavia sono le modalita di tale operazione a dover rimanere velate, in modo da
non appesantire il cliente con tediose operazioni di invio di feedback e valutazioni ed allo stesso tempo permettere una raccolta capillare delle informazioni. Parallelamente alla raccolta di dati funzionali al producer, sono state implementate features per il consumatore, come notifiche promozionali place-triggered e pubblicita mirata. Tra tutte le tecnologie adibite allo scambio di informazioni, si e scelto l'utilizzo del Bluetooth e del piu recente Bluetooth Low Energy (BLE) per permettere ai dispositivi di comunicare tra loro.
22
Croatti, Angelo. "Sistemi Informatici Mobili e Realtà Aumentata a supporto del lavoro cooperativo in scenari d'emergenza: studio e realizzazione di un caso applicativo." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7740/.
Full textAbstract:
Scopo primario della tesi è studiare e progettare un sistema informatico che proponga un buon livello di innovazione tecnologica in relazione al contesto applicativo di riferimento, ovvero relativamente al supporto al lavoro cooperativo di operatori in scenari d'emergenza. In particolare, la tesi si concentra sul'ecosistema software che ruota attorno al singolo operatore con l'obiettivo di dotarlo di uno strumento informatico che gli consenta di avvalersi di un efficace ed efficiente supporto per l'esecuzione delle proprie azioni sul campo (in generale, per la prima assistenza ai pazienti, triage e monitoraggio di parametri vitali). A tal proposito, l'ambito tecnologico di riferimento è quello del Pervasive Mobile Computing, con specifico riferimento ai sistemi context-aware e a quelli con comportamenti fortemente autonomi. Inoltre, al fine di dotare l'operatore di un supporto per l'interazione con il sistema stesso in modalità hands-free, sono stati analizzati i dispositivi wearable di tipo "see-through"; in particolare, i recenti glasses per realtà aumentata. La progettazione del sistema e il conseguente sviluppo del prototipo (che implementa le caratteristiche più significative ed innovative), è stata guidata da un'ispirazione basata sul modello ad agenti (integrato a quello ad oggetti), rivisitando opportunamente l'utilizzo dei componenti offerti dalla tecnologia Android, al fine di ottenere un prodotto software robusto e modulare facilmente manutenibile ed estendibile. Infine, per garantire a ciascun operatore rapida fruibilità del sistema sono state sfruttate le potenzialità offerte dall'uso di smartcard NFC ed inoltre è stato progettato un protocollo di comunicazione ad hoc, basato su stack Bluetooth, per l'integrazione degli AR-Glasses all'intero sistema.
23
Wister, Ovando Miguel Antonio. "Arquitectura de descubrimiento de servicios en MANET basada en dispositivos de capacidades superiores liderando clusters." Doctoral thesis, Universidad de Murcia, 2008. http://hdl.handle.net/10803/10925.
Full textAbstract:
This thesis introduces LIFT, a combination of a cluster-based approach with a cross-layer scheme in order to discover services in MANET. In this proposal, High Capability Devices (HCD) are differentiated from Limited Capability Devices (LCD). HCD are set up as the cluster leaders in each cluster so as to perform most of the service discovery activities. Thus, LIFT manages local traffic instead of global traffic. Consequently, messages, energy, computing processes, and bandwidth were reduced due to the optimum usage of network resources. In order to know if LIFT achieves its goal to minimize resources, we have compared LIFT with another well-known solution (AODV-SD) in terms of control message overhead, energy consumption, PDR, throughput, hop count average, NRL, end-to-end delay, and service acquisition time. After carrying out many trials and simulations, LIFT improved previous results in the area.<br>La tesis presenta a LIFT, una solución para descubrir servicios en MANET que combina un enfoque basado en cluster con un esquema cross-layer. En esta propuesta se diferencian los dispositivos de capacidades superiores (HCD) de los dispositivos de capacidades limitadas (LCD). Los HCD se establecen como líderes en cada cluster para ejecutar la mayoría de las actividades de descubrimiento de servicios. De esta forma, LIFT maneja tráfico local en vez de tráfico global. Por tanto, se reduce el consumo de mensajes, energía y cómputo al hacer uso óptimo de los recursos de la red. Para saber si LIFT logra el objetivo de minimizar recursos, lo hemos comparado contra otra solución (AODV-SD) en aspectos como sobrecarga de paquetes de control, consumo de energía, PDR, throughput, promedio de saltos, NRL, retardo extremo a extremo y tiempo de adquisición de servicios. Después de muchas pruebas y simulaciones, LIFT mejora resultados anteriores en este campo
24
Désiré, Nguessan. "Um modelo de gerência de segurança para middleware baseado em tuple para ambientes difusos e nômades." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/3/3141/tde-21012010-171918/.
Full textAbstract:
Este trabalho explora a gerência de segurança e cooperação de aplicações em sistemas distribuídos móveis. Neste contexto, é feito um estudo sobre os diferentes middlewares para ambientes móveis (mobile middleware): suas capacidades de enfrentar os desafios da mobilidade e da segurança. As análises do estudo mostram que esses middlewares devem possuir características que lhes permitem uma melhor adaptação às necessidades das aplicações e à natureza dos ambientes móveis. Os middlewares existentes pouco abordam a questão da segurança. A segurança ainda é um problema complexo que deve ser gerido em todos os níveis de um sistema distribuído móvel, incluindo novos mecanismos. Com base nessa análise, foi desenvolvido um modelo de gerência de segurança que implementa um mecanismo de autenticação mútua, confidencialidade, detecção de intruso e controle de acesso em ambientes móveis. O objetivo é garantir a confiabilidade, a disponibilidade de serviços e a privacidade do usuário através da tecnologia PET - Privacy-Enhancing Tecnologies. A idéia é fundamentada em agentes interceptadores e autoridades de segurança que distribuem tíquetes de segurança e controlam o acesso a recursos e espaços de tuple do ambiente. O estudo de caso apresentou resultados satisfatórios que permitem julgar a pertinência do modelo proposto. O modelo será integrado a um sistema de e-saúde.<br>The work exploits the security management and the cooperation of applications in mobile distributed systems. In this context a study of different mobile middleware is made. The study examines their capacities to face the challenges of mobility and security issues. The analysis shows that the existing middleware has very few approaches on security problems; security is still a complex issue to be managed in all the levels of mobile distributed system including new mechanisms. Based on this analysis, a security management model is developed that implements a mechanism for mutual authentication, confidentiality, intrusion detection, access control of mobile agents in mobile environments, ensures services availability and user privacy, through technology PET (Privacy-Enhancing Technologies). The idea is based on interceptor agents and security authorities that distribute security tickets and control the access to resources and Tuple spaces in mobile environment. The proposed model presents good performance and is integrated to an e-health system: Relationship Management with Chronic Patient GRPC.
25
Jaimes, Luis Gabriel. "A Location-Based Incentive Mechanism for Participatory Sensing Systems with Budget Constraints." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4087.
Full textAbstract:
Participatory Sensing (PS) systems rely on the willingness of mobile users to participate in the collection and reporting of data using a variety of sensors either embedded or integrated in their
cellular phones. Users agree to use their cellular phone resources to sense and transmit the data of interest because these data will be used to address a collective problem that otherwise would
be very difficult to assess and solve. However, this new data collection paradigm has not been very successful yet mainly because of the lack of incentives for participation and privacy concerns. Without adequate incentive and privacy guaranteeing mechanisms most users will not be willing to participate. This thesis concentrates on incentive mechanisms for user participation in PS system. Although several schemes have been proposed thus far, none has used location information and imposed budget and coverage constraints, which will make the scheme more realistic and efficient. A recurrent reverse auction incentive mechanism with a greedy algorithm that selects a representative subset of the users according to their location given a fixed budget is proposed. Compared to existing mechanisms, GIA (i.e., Greedy Incentive Algorithm) improves the area covered by more than 60 percent acquiring a more representative set of samples after every round, i.e., reduces the collection of unnecessary (redundant) data, while maintaining the same number of active users in the system and spending the same budget.
26
Martini, Ricardo Giuliani. "UMA ABORDAGEM PARA A PERSONALIZAÇÃO AUTOMÁTICA DE INTERFACES DE USUÁRIO PARA DISPOSITIVOS MÓVEIS EM AMBIENTES PERVASIVOS." Universidade Federal de Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/5397.
Full textAbstract:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The great advance in the semiconductor industry allowed a increase in the development and
marketing of mobile electronic devices. With the expansion of this market, the need for new
programming methods and a different view for the development of user interfaces increased.
Interfaces that were used before only in desktops and relied on keyboard and mouse interaction
are now used in a variety of devices, including cell phones, smartphones and tablets. Often
making the use of touch screens as well as by voice commands. Taking into account these
aspects of cross-platform and different usability, it becomes apparent the importance of interfaces
that adapt "to the environment." With the advent of mobile devices, this particular area
became of fundamental importance because this kind of devices has specifics characteristics
that are essential to the composition of a satisfactory user interface. So, mobile devices are
covering a large variety of features, which makes the interfaces development a very complex
task. One way to develop and adapt user interfaces in order to facilitate handling and to reduce
stress at the time of use of the device is through the use of user profiles and capabilities of devices.
Therefore, that interface is adapted to the user needs and preferences, as well be able to
fully adapt to the device features. Considering this assumption, this dissertation aims to present
the architecture PIDIM. This architecture goal to assist in the customization and adaptation of
user interfaces for mobile devices in pervasive environments. The user interfaces adapted for
this process plans to facilitate the use of mobile devices. The proposed approach presents an
architecture that uses concepts of Pervasive Computing enabling information access anytime,
anyplace, and in any computing device. Besides, it represents data on the user s profile, so that
adaptation of the interfaces is entirely focused on the end user. The knowledge representation
about the user profile needed for PIDIM architecture modeling is done through ontologies due
to the possibility of reuse of stored information. In order to validate and demonstrate the flow
of operation of the proposed approach is presented a case study in the literature, which has as
scenario the adaptation of user interfaces when it is in motion.<br>O grande avanço na indústria de semicondutores possibilitou um aumento no desenvolvimento
e comercialização de dispositivos eletrônicos móveis. Juntamente com este mercado,
cresceu a necessidade de novos métodos de programação e uma visão diferente para criação de
interfaces. Interfaces que antes só eram utilizadas em desktops com base de interação teclado
e mouse, hoje são utilizadas em diferentes tipos de dispositivos, como celulares, smartphones
e tablets, seja utilizadas em telas sensíveis ao toque como também por comando de voz. Levando
em conta estes aspectos de multiplataforma e diferentes usabilidades, torna-se visível
a importância de interfaces que se adaptem "ao meio". Com o aparecimento dos dispositivos
móveis, a área em questão passou a ser de fundamental importância, pois estes dispositivos possuem
características particulares fundamentais para a composição de uma interface satisfatória
ao usuário. Os dispositivos móveis estão abrangendo uma diversidade grande de características,
o que torna o desenvolvimento de uma interface um processo complexo. Uma das formas de
desenvolver e adaptar interfaces de usuário de forma a facilitar o manuseio e diminuir o estresse
no momento da utilização do dispositivo é através do uso de perfis de usuários e capacidades
de dispositivos, fazendo com que a interface se adapte às necessidades e preferências do usuário
e consiga se adaptar totalmente às funcionalidades do dispositivo. Considerando isto, este
trabalho tem como objetivo apresentar a arquitetura PIDIM, a fim de ajudar na personalização
e adaptação de interfaces de usuário para dispositivos móveis em ambientes pervasivos. As
interfaces de usuários adaptadas por este processo da arquitetura PIDIM visam facilitar a utilização
de dispositivos móveis. A abordagem proposta apresenta uma arquitetura que utiliza
conceitos de Computação Pervasiva possibilitando acesso à informação a qualquer hora, lugar,
e dispositivo computacional, além de representar dados relativos ao perfil de usuários, para que
a adaptação das interfaces seja totalmente focada no usuário final. A representação do conhecimento
sobre o perfil do usuário necessário para a modelagem da arquitetura PIDIM é feita
através de ontologias devido a possibilidade de reuso das informações armazenadas. A fim de
validar e demonstrar o fluxo de funcionamento da abordagem proposta, é apresentado um estudo
de caso, encontrado na literatura, o qual possui como cenário a adaptação de interfaces de
usuários quando o mesmo se encontra em movimento.
27
Du, Yifan. "Collaborative crowdsensing at the edge." Electronic Thesis or Diss., Sorbonne université, 2020. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2020SORUS032.pdf.
Full textAbstract:
Le crowdsensing mobile permet d’obtenir des données sur l’environnement à un coût relativement faible. De fait, les personnes peuvent collecter et partager des observations spatio-temporelles au moyen de capteurs intégrés dans les appareils intelligents comme les smartphones. En particulier, le crowdsensing opportuniste permet aux citoyens de détecter des phénomènes environnementaux à l’échelle urbaine grâce à une application dédiée s’exécutant en arrière plan. Cependant, le crowdsensing est confronté à différents défis : la pertinence des mesures fournies dépend de l’adéquation entre le contexte de détection et le phénomène analysé ; la collecte incontrôlée de données entraîne une faible qualité de détection ainsi qu’une forte consommation des ressources au niveau des appareils ; le crowdsensing à large échelle induit des coûts importants de communication, de calcul et financiers en raison de la dépendance au cloud pour le traitement des données brutes. Notre thèse vise à rendre le crowdsensing opportuniste comme un moyen fiable d’observation de l’environnement urbain. Pour ce faire, nous préconisons de favoriser la collecte et l’inférence du phénomène physique au plus proche de la source. À cet effet, notre recherche se concentre sur la définition d’un ensemble de protocoles complémentaires, qui mettent en œuvre un crowdsensing collaboratif entre les nœuds mobiles en combinant : L’inférence du contexte physique du crowdsensor, qui caractérise les données recueillies. Nous évaluons un contexte qui ne se limite par à une simple position géographique et nous introduisons une technique d’apprentissage du contexte qui s’effectue au niveau de l’appareil afin de pallier l’impact de l’hétérogénéité des crowdsensors sur la classification. Nous introduisons spécifiquement un algorithme hiérarchique pour l’inférence du contexte qui limite les interactions avec l’usager, tout en augmentant la précision de l’inférence. Le groupement contextuel des crowdsensors de manière à partager la charge et effectuer une captation sélective. Nous introduisons une stratégie de collaboration ad hoc qui vise à affecter différents rôles aux crowdsensors, afin de répartir la charge entre les crowdsensors proches en fonction de leur contexte respectif. L’évaluation de notre solution montre une réduction de la consommation globale des ressources et une meilleure qualité des données, comparée à celle basée sur une architecture cloud. L’agrégation nomade de données pour améliorer les connaissances transférées au cloud. Nous introduisons une solution à l’agrégation des données observées qui distribue l’interpolation sur les crowdsensors. Les résultats de son évaluation montrent des gains importants en termes de communication cellulaire, de calcul sur le cloud et donc de coûts financiers, tandis que la précision globale des données reste comparable à une approche centralisée. En résumé, l’approche collaborative proposée pour le crowdsensing réduit les coûts à la fois sur le terminal et sur le cloud, tout en augmentant la qualité globale des données<br>Mobile crowdsensing is a powerful mechanism to contribute to the ubiquitous sensing of data at a relatively low cost. With mobile crowdsensing, people provide valuable observations across time and space using sensors embedded in/connected to their smart devices, e.g., smartphones. Particularly, opportunistic crowdsensing empowers citizens to sense objective phenomena at an urban and fine-grained scale, leveraging an application running in the background. Still, crowdsensing faces challenges: The relevance of the provided measurements depends on the adequacy of the sensing context with respect to the phenomenon that is analyzed; The uncontrolled collection of massive data leads to low sensing quality and high resource consumption on devices; Crowdsensing at scale also involves significant communication, computation, and financial costs due to the dependence on the cloud for the post-processing of raw sensing data. This thesis aims to establish opportunistic crowdsensing as a reliable means of environmental monitoring. We advocate enforcing the cost-effective collection of high-quality data and inference of the physical phenomena at the end device. To this end, our research focuses on defining a set of protocols that together implement collaborative crowdsensing at the edge, combining : Inference of the crowdsensor’s physical context characterizing the gathered data: We assess the context beyond geographical position. We introduce an online learning approach running on the device to overcome the diversity of the classification performance due to the heterogeneity of the crowdsensors. We specifically introduce a hierarchical algorithm for context inference that requires little feedback from users, while increasing the inference accuracy per user. Context-aware grouping of crowdsensors to share the workload and support selective sensing: We introduce an ad hoc collaboration strategy, which groups co-located crowdsensors together, and assigns them various roles according to their respective contexts. Evaluation results show that the overall resource consumption due to crowdsensing is reduced, and the data quality is enhanced, compared to the cloudcentric architecture. Data aggregation on the move to enhance the knowledge transferred to the cloud: We introduce a distributed interpolation-mediated aggregation approach running on the end device. We model interpolation as a tensor completion problem and propose tensor-wise aggregation, which is performed when crowdsensors encounter. Evaluation results show significant savings in terms of cellular communication, cloud computing, and, therefore, financial costs, while the overall data accuracy remains comparable to the cloud-centric approach. In summary, the proposed collaborative crowdsensing approach reduces the costs at both the end device and the cloud, while increasing the overall data quality
28
Castillo, Jason Moses. "MobiShare : mobile computing with no strings attached." Thesis, 2013. http://hdl.handle.net/2152/24001.
Full textAbstract:
In today’s world, technology is growing at a fast rate compared at other times. Sales have increased in the smart phone market, which has created new opportunities in pervasive computing. In pervasive computing, nodes enter and leave a network at any time. Within the network, nodes can transfer data to other nodes. The information is not retained in any static location such as a server. The mobile infrastructure requires a way to handle all the information in a dynamic way. The use of a centralized server in a mobile environment creates deterioration in the performance of obtaining information. The main goal of this paper is to provide data persistence using a “substrate” that is inherently not persistent. The data will be stored within the network for availability to all users.
Saving data within a network would provide a means to obtain any type of information without relying on the source of where the data came from in the network. Users would also be able to continue downloading where they left off when they return to the network. Consider an environment where people can share music or books. For example, say that John Doe was searching for a particular song to download and in the network Jane has the song that was requested. John decides to download the song without knowing that it is from Jane. Then John decides to leave the network and the download stops. Whenever John rejoins the network the download of his song will continue where he left off, and his ability to access the information will not depend whether or not Jane is present in the network. John may retrieve the file from any other user who has the exact same file. The requested information that the user queries in a search engine will be stored as a metadata within the network, either by other nodes or a temporary server. This allows data to be obtained without relying on the "main user" or creator of the data to be present in the network. The users would also be able to retrieve the data at multiple times.<br>text
29
Varshavsky, Alexander. "Using Ambient Radio Environment to Support Practical Pervasive Computing." Thesis, 2008. http://hdl.handle.net/1807/17258.
Full textAbstract:
Mobile applications can benefit from increased awareness of the device's context. Unfortunately, existing solutions for inferring context require special purpose sensors or beacons on the mobile devices or in the physical environment. This requirement significantly limits the deployment of these solutions. In this thesis, I argue that mobile devices can infer a substantial amount of their context by leveraging their existing wireless interfaces to monitor ambient radio sources, such as GSM cell towers or WiFi access points. I focus on two important problems in context-aware computing: localization of mobile devices and detecting proximity between mobile devices for authentication purposes. Specifically, I present an accurate localization system based on fingerprinting of GSM signals. I show that the key to more accurate GSM localization is the use of wide signal strength fingerprints that include readings from a large number of base stations. Next, I present a method that addresses the key drawback of fingerprint-based localization systems - the need to collect extensive measurements to train the system in every target environment. Finally, I show how radio environment sensing can be used to secure the communication of devices that come within close proximity. Removing the need for additional hardware on the mobile devices and in the physical environment renders the approach that I present amenable for widespread deployment.
30
Grim, Evan Tyler. "Grapevine : efficient situational awareness in pervasive computing environments." 2012. http://hdl.handle.net/2152/19705.
Full textAbstract:
Many pervasive computing applications demand expressive situational awareness, which entails an entity in the pervasive computing environment learning detailed information about its immediate and surrounding context. Much work over the past decade focused on how to acquire and represent context information. However, this work is largely egocentric, focusing on individual entities in the pervasive computing environment sensing their own context. Distributed acquisition of surrounding context information is much more challenging, largely because of the expense of communication among these resource-constrained devices. This thesis presents Grapevine, a framework for efficiently sharing context information in a localized region of a pervasive computing network, using that information to dynamically form groups defined by their shared situations, and assessing the aggregate context of that group. Grapevine’s implementation details are presented and its performance benchmarked in both simulation and live pervasive computing network deployments.<br>text
31
Silva, João André Almeida e. "Data Storage and Dissemination in Pervasive Edge Computing Environments." Doctoral thesis, 2021. http://hdl.handle.net/10362/121738.
Full textAbstract:
Nowadays, smart mobile devices generate huge amounts of data in all sorts of gatherings.
Much of that data has localized and ephemeral interest, but can be of great use if shared
among co-located devices. However, mobile devices often experience poor connectivity,
leading to availability issues if application storage and logic are fully delegated to a
remote cloud infrastructure. In turn, the edge computing paradigm pushes computations
and storage beyond the data center, closer to end-user devices where data is generated
and consumed. Hence, enabling the execution of certain components of edge-enabled
systems directly and cooperatively on edge devices.
This thesis focuses on the design and evaluation of resilient and efficient data storage
and dissemination solutions for pervasive edge computing environments, operating with
or without access to the network infrastructure. In line with this dichotomy, our goal can
be divided into two specific scenarios. The first one is related to the absence of network
infrastructure and the provision of a transient data storage and dissemination system
for networks of co-located mobile devices. The second one relates with the existence of
network infrastructure access and the corresponding edge computing capabilities.
First, the thesis presents time-aware reactive storage (TARS), a reactive data storage
and dissemination model with intrinsic time-awareness, that exploits synergies between
the storage substrate and the publish/subscribe paradigm, and allows queries within a
specific time scope. Next, it describes in more detail: i) Thyme, a data storage and dis-
semination system for wireless edge environments, implementing TARS; ii) Parsley, a
flexible and resilient group-based distributed hash table with preemptive peer relocation
and a dynamic data sharding mechanism; and iii) Thyme GardenBed, a framework
for data storage and dissemination across multi-region edge networks, that makes use of
both device-to-device and edge interactions.
The developed solutions present low overheads, while providing adequate response
times for interactive usage and low energy consumption, proving to be practical in a
variety of situations. They also display good load balancing and fault tolerance properties.<br>Resumo
Hoje em dia, os dispositivos móveis inteligentes geram grandes quantidades de dados
em todos os tipos de aglomerações de pessoas. Muitos desses dados têm interesse loca-
lizado e efêmero, mas podem ser de grande utilidade se partilhados entre dispositivos
co-localizados. No entanto, os dispositivos móveis muitas vezes experienciam fraca co-
nectividade, levando a problemas de disponibilidade se o armazenamento e a lógica das
aplicações forem totalmente delegados numa infraestrutura remota na nuvem. Por sua
vez, o paradigma de computação na periferia da rede leva as computações e o armazena-
mento para além dos centros de dados, para mais perto dos dispositivos dos utilizadores
finais onde os dados são gerados e consumidos. Assim, permitindo a execução de certos
componentes de sistemas direta e cooperativamente em dispositivos na periferia da rede.
Esta tese foca-se no desenho e avaliação de soluções resilientes e eficientes para arma-
zenamento e disseminação de dados em ambientes pervasivos de computação na periferia
da rede, operando com ou sem acesso à infraestrutura de rede. Em linha com esta dico-
tomia, o nosso objetivo pode ser dividido em dois cenários específicos. O primeiro está
relacionado com a ausência de infraestrutura de rede e o fornecimento de um sistema
efêmero de armazenamento e disseminação de dados para redes de dispositivos móveis
co-localizados. O segundo diz respeito à existência de acesso à infraestrutura de rede e
aos recursos de computação na periferia da rede correspondentes.
Primeiramente, a tese apresenta armazenamento reativo ciente do tempo (ARCT), um
modelo reativo de armazenamento e disseminação de dados com percepção intrínseca
do tempo, que explora sinergias entre o substrato de armazenamento e o paradigma pu-
blicação/subscrição, e permite consultas num escopo de tempo específico. De seguida,
descreve em mais detalhe: i) Thyme, um sistema de armazenamento e disseminação de
dados para ambientes sem fios na periferia da rede, que implementa ARCT; ii) Pars-
ley, uma tabela de dispersão distribuída flexível e resiliente baseada em grupos, com
realocação preventiva de nós e um mecanismo de particionamento dinâmico de dados; e
iii) Thyme GardenBed, um sistema para armazenamento e disseminação de dados em
redes multi-regionais na periferia da rede, que faz uso de interações entre dispositivos e
com a periferia da rede.
As soluções desenvolvidas apresentam baixos custos, proporcionando tempos de res-
posta adequados para uso interativo e baixo consumo de energia, demonstrando serem
práticas nas mais diversas situações. Estas soluções também exibem boas propriedades de balanceamento de carga e tolerância a faltas.
32
Michel, Jonas Reinhardt. "The Gander search engine for personalized networked spaces." 2012. http://hdl.handle.net/2152/19714.
Full textAbstract:
The vision of pervasive computing is one of a personalized space populated with vast amounts of data that can be exploited by humans. Such Personalized Networked Spaces (PNetS) and the requisite support for general-purpose expressive spatiotemporal search of the “here” and “now” have eluded realization, due primarily to the complexities of indexing, storing, and retrieving relevant information within a vast collection of highly ephemeral data. This thesis presents the Gander search engine, founded on a novel conceptual model of search in PNetS and targeted for environments characterized by large volumes of highly transient data. We overview this model and provide a realization of it via the architecture and implementation of the Gander search engine. Gander connects formal notions of sampling a search space to expressive, spatiotemporal-aware protocols that perform distributed query processing in situ. This thesis evaluates Gander through a user study that examines the perceived usability and utility of our mobile application, and benchmarks the performance of Gander in large PNetS through network simulation.<br>text
33
Ng-Kruelle, Seok Hian. "The price of convenience : implications of socially pervasive computing for personal privacy." 2006. http://arrow.unisa.edu.au:8081/1959.8/46369.
Full textAbstract:
Literature has identified the need to study socially pervasive ICT in context in order to understand how user acceptability of innovation varies according to different inputs. This thesis contributes to the existing body of knowledge on innovation studies (Chapter 2) and proposes a methodology for a conceptual model, for representing dynamic contextual changes in longitudinal studies. The foundation for this methodology is the 'Price of Convenience' (PoC) Model (Chapter 4). As a theory development Thesis, it deals with two related studies of socially pervasive ICT implementation: (1) voluntary adoption of innovations and (2) acceptance of new socially pervasive and ubiquitous ICT innovations (Chapters 6 and 7).
34
Gonçalves, Paulo José Pereira. "Disseminação, documentação e otimização da plataforma INTCare." Master's thesis, 2017. http://hdl.handle.net/1822/54923.
Full textAbstract:
Dissertação de mestrado integrado em Engenharia e Gestão de Sistemas de Informação<br>O aumento do uso das tecnologias, que facilitam e agilizam os processos de quem constantemente necessita realizar diversas ações ou cumprir os mais variados procedimentos, exige uma constante adaptabilidade, seja por parte das organizações ou dos utilizadores.
O foco deste projeto de dissertação prende-se exatamente com a adaptabilidade das tecnologias, nomeadamente a tecnologia usada na Unidade de Cuidados Intensivos (UCI), do Centro Hospitalar do Porto (CHP).
O crescente uso de diferentes dispositivos eletrónicos, todos eles com caraterísticas e dimensões distintas, obriga à otimização das plataformas que transmitem e manipulam toda a informação, para que seja possível a sua utilização independentemente de qual o dispositivo que está a ser utilizado.
Através da introdução de novas funcionalidades ao sistema atual, pretende-se com este projeto de dissertação efetuar a otimização da plataforma INTCare usada na UCI do CHP, tendo como principal finalidade aumentar a sua responsividade podendo desta forma adaptar-se às características de qualquer dispositivo, com o intuito de facilitar a aquisição de conhecimento e melhorar o suporte no processo de tomada de decisão, por parte dos profissionais da UCI.
Neste documento é descrita a contextualização e motivação do tema em estudo, são apresentadas as estratégias de pesquisa adotadas e efetuada uma descrição dos conceitos inerentes ao projeto, com principal foco nas funcionalidades e características do sistema INTCare. Reúne ainda as metodologias de investigação a utilizar ao longo da realização deste projeto são apresentadas em detalhe, as melhorias realizadas na Folha de Enfermagem Eletrónica.<br>The use of technologies that can facilitate and streamline the processes of those who constantly need to perform various actions or comply with the most varied procedures, requires constant adaptability, either by organizations or users.
The focus of this dissertation project is precisely the adaptability of technologies and in this case the technology used in the Intensive Care Unit (ICU) of the Centro Hospitalar do Porto (CHP).
The increasing use of different electronic devices, all with different characteristics and dimensions, requires the optimization of the platforms that transmit and manipulate all the information, so that it is possible to use it regardless of which device is being used.
Through the introduction of new functionalities to the current system, it is intended with this dissertation project to optimize the INTCare platform used in the ICU of the CHP, with the main purpose of increasing its responsiveness, thus being able to adapt to the characteristics of any device, with the purpose of facilitating the acquisition of knowledge and improving the support in the decision making process by the professionals of the ICU.
This document describes the contextualization and motivation of the study topic, presents the research strategies adopted and describes the concepts inherent to the project, with a main focus on the features and characteristics of the INTCare system. It also gathers the research methodologies to be used throughout the realization of this project and the improvements made on the Eletronic Nursing Record.
35
Van, Heerden Alastair. "Pervasive computing and public health research in Africa: mobile phones in the collection, analysis and dissemination of health research." Thesis, 2014.
Find full textAbstract:
With aging populations and rising health care costs, many high-income countries are exploring mobile computing technologies to improve the efficiency and effectiveness of health care provision. These technologies, which underpin the field of pervasive computing, introduce a new model of human–computer interaction. Instead of the scenario where a single user interacts with a desk-bound “personal” computer, pervasive computing envisions a world embedded with small, inexpensive, portable networked devices able to communicate seamlessly with each other. In common with resource-rich countries, the field of pervasive computing has the potential to promote and support healthy population development in middle and low-income countries, and this, therefore, has relevance for South Africa. Current estimates suggest that there are between 28 and 32 million mobile phones in South Africa. This means that around 60% of all South Africans own, or have access to, mobile telecommunication. Over 900 000 km2 of the country is covered by the GSM (Global System for Mobile Communication) network of Vodacom, the largest telecommunications company in the country. Over 90% of South Africa is provided with access to mobile connectivity through shared agreements between the country’s major telecommunications networks.
Aims
The ubiquity of mobile phones has resulted in their receiving increasing attention from public health researchers. Yet a better understanding of how mobile phones could support health research in South Africa is still an emerging field with many unanswered
questions. This thesis attempts to fill some of these gaps in our current knowledge. In particular, the primary aim of this work is to implement and evaluate the use of mobile phones as instruments with which to collect and analyse information for monitoring, evaluation and research in low-resource rural African settings.
Methods
To investigate this aim, data were gathered from the development, implementation and evaluation of four health surveys in South Africa. Two surveys were conducted with Birth to Twenty, a birth cohort of South African young adults living in Greater Johannesburg. These data were used to better understand the feasibility and data-quality implications of using mobile phones as a tool for the administration of ‘self-administered’ surveys. Two additional surveys, completed in KwaZulu-Natal province, evaluated the same themes of feasibility, acceptability and impact of data quality in mobile-phone-assisted personal (face-to-face) interviews (MPAPI). The first, conducted with 500 HIV-positive pregnant women in eight primary health clinics and 12 interviewers trained to use the mobile-phone survey software, was used to assess the feasibility and acceptability of MPAPI. The final survey compared the difference in data quality achieved by 100 interviewers using either pen and paper, or mobile phones to conduct a short health survey. De Leeuw's conceptual model was used to frame how mode characteristics influence data quality.
Results
Mobile-phone-assisted interviewing was found to have an impact on the data quality, feasibility and acceptability of health surveys. MPAPI was found to be similar in terms of accuracy and cost to small-scale paper-and-pen interviewing (PAPI) surveys. Time lines
and accessibility were improved by the use of MPAPI. Mobile-phone-assisted self-interviewing (MPASI) surveys were found to have a lower survey response but a higher item-completion rate. Acceptability was found to be moderated by technological familiarity and the use patterns of mobile-phone features. Finally, conducting health research using mobile-phone interviews in South Africa was found to be feasible; to reduce the loss of questionnaires, and photocopying and data-entry costs; and to improve the speed at which data becomes available for analysis. Factors that mediated feasibility included the technical expertise of the project management and field staff, the technological know-how of participants, the comprehensiveness of the interviewer training, the mobile communication channel used (e.g., handset-agnostic SMS) and the presence or absence of an interviewer.
Conclusion
Under the right conditions, mobile-phone-assisted interviewing appears to be a feasible and practical tool for the rapid collection of health information, with data accuracy being the same or better than pen-and-paper interviews. It is argued that these benefits increase as the scale of the survey increases. Improved data can positively influence population health by providing decision makers with more rapid access to accurate data with which to monitor large-scale health systems. Small projects that do not require the rapid availability of data or where staff do not have the appropriate technical proficiencies would be better suited at present to more traditional survey data-collection techniques.
Keywords: mobile phones; pervasive computing; mHealth; data collection; survey error
36
Σαχπατζίδης, Γιώργος. "Σχεδιασμός, υλοποίηση και αξιολόγηση χωροευαίσθητης εφαρμογής για κινητές συσκευές". Thesis, 2013. http://hdl.handle.net/10889/6709.
Full textAbstract:
Η παρούσα διπλωματική εργασία περιγράφει τη διαδικασία σχεδιασμού, υλοποίησης και αξιολόγησης του χωροευαίσθητου παιχνιδιού Benaki MuseumScrabble (BMS), το οποίο απευθύνεται σε επισκέπτες του μουσείου Μπενάκη.<br>This diploma thesis describes the design, implementation and evaluation of the location based game "Benaki MuseumScrabble", which was created for the Benaki museum visitors
37
HASSAN, Ali. "Ajouter de l'information spatiale aux modèles de composant logiciel - l'effet de localisation." Phd thesis, 2012. http://tel.archives-ouvertes.fr/tel-00785897.
Full textAbstract:
Highly distributed environments (HDEs) are deployment environments that include powerful and robust machines in addition to resource-constrained and mobile devices such as laptops, personal digital assistants (or PDAs), smart-phones, GPS devices, sensors, etc. Developing software for HDEs is fundamentally different from the software development for central systems and stable distributed systems. This argument is discussed deeply and in-details throughout this dissertation. HDE applications are challenged by two problems: unreliable networks, and heterogeneity of hardware and software. Both challenges need careful handling, where the system must continue functioning and delivering the expected QoS. This dissertation is a direct response to the mentioned challenges of HDEs. The contribution of this dissertation is the cloud component model and its related formal language and tools. This is the general title. However, and to make this contribution clear, we prefer to present it in the following detailed form: (1) We propose a paradigm shift from distribution transparency to localization acknowledgment being the first class concern. (2) To achieve the above mentioned objective, we propose a novel component model called cloud component (CC). (3) In this dissertation we propose a new approach to assemble CCs using systematic methodology that maintains the properties of CC model. (4) Cloud component development process and cloud component based systems development process. (5) Location modeling and advanced localization for HDEs are the pivotal key in our contribution. (6) Formal language to model single CC, CC assembly, CC development process, and CC based systems. (7) We finally present our fully-developed supporting tools: the cloud component management system CCMS, and the Registry utility. To respond to the challenges posed by HDEs, and to maintain expected software quality at the user endpoint, we think we need to pass a ¿paradigm shift¿ from the way software is designed and implemented currently to our new vision that this dissertation is devoted to. This is a paradigm shift from distribution transparency to localization acknowledgment being the first class concern. The contribution in this thesis has several faces as explained above, but still, these faces are cohesive. Each of these faces form a partial contribution, however, this partial contribution does not mean anything if isolated from the overall proposal. Moreover, the merit of the overall proposal can not be grasped by reading one partial contribution. The merit of the proposal is evident only if all parts of this work are cohesively organized. Finally, we claim that our proposal spans the entire software development process for HDEs, from requirements to deployment and runtime management.
38
Gruhn, Volker, and Malte Hülder. "Hybrid application support for mobile information systems." 2005. https://ul.qucosa.de/id/qucosa%3A32840.
Full textAbstract:
The wide-spread presence of wireless networks and the availability of mobile devices has enabled the development of mobile applications that take us a step closer to accomplishing Weiser’s vision of ubiquitous
computing (Weiser, 1991). Unfortunately however, network connectivity is still not given anywhere and at any time. To increase the benefit of mobile applications, the next logical step is to provide support for an offline modethat allows to continuously work with an application, even when the device is not connected to a network. In this paper typical problems of replicating data are explained, possible solutions are discussed and two architectural patterns that could be used to implement hybrid support are illustrated.
39
Michel, Jonas Reinhardt. "Supporting device-to-device search and sharing of hyper-localized data." Thesis, 2015. http://hdl.handle.net/2152/31018.
Full textAbstract:
Supporting emerging mobile applications in densely populated environments requires connecting mobile users and their devices with the surrounding digital landscape. Specifically, the volume of digitally-available data in such computing spaces presents an imminent need for expressive mechanisms that enable humans and applications to share and search for relevant information within their digitally accessible physical surroundings. Device-to-device communications will play a critical role in facilitating transparent access to proximate digital resources. A wide variety of approaches exist that support device-to-device dissemination and query-driven data access. Very few, however, capitalize on the contextual history of the shared data itself to distribute additional data or to guide queries. This dissertation presents Gander, an application substrate and mobile middleware designed to ease the burden associated with creating applications that require support for sharing and searching of hyper-localized data in situ. Gander employs a novel trajectory-driven model of spatiotemporal provenance that enriches shared data with its contextual history -- annotations that capture data's geospatial and causal history across a lifetime of device-to-device propagation. We demonstrate the value of spatiotemporal data provenance as both a tool for improving ad hoc routing performance and for driving complex application behavior. This dissertation discusses the design and implementation of Gander's middleware model, which abstracts away tedious implementation details by enabling developers to write high-level rules that govern when, where, and how data is distributed and to execute expressive queries across proximate digital resources. We evaluate Gander within several simulated large-scale environments and one real-world deployment on the UT Austin campus. The goal of this research is to provide formal constructs realized within a software framework that ease the software engineering challenges encountered during the design and deployment of several applications in emerging mobile environments.<br>text