Dissertations / Theses on the topic 'Location awareness'
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Chandra, Madhup. "Electronic Textiles for Autonomous Location Awareness." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/36120.
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The mature textile industry coupled with our familiarity and comfort level with fabrics and the possibility of seamless integration of electronic components such as sensors, processors, and power sources in the fabric opens up a new dimension of computing. The electronic textile presents a suitable substrate over which numerous applications can be developed. Location awareness is one such application that can reap the benefits of e-textiles such that it can be widely deployed at a reasonable cost for assisting visually impaired people or to provide navigational help during emergency situations. This thesis describes an autonomous, wearable location awareness system that will determine a user's location within a building given a map of that building. The thesis examines the issues, constraints, and challenges concerning the design of such a system. The two-part location awareness algorithm computes the location and orientation within a room as well as determines the user's movement between rooms. The efficacy of the proposed system is demonstrated with a wearable prototype.Master of Science
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Celebi, Hasari. "Location awareness in cognitive radio networks." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002562.
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Leonhardt, Ulf. "Supporting location-awareness in open distributed systems." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286368.
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Alrayes, Fatma. "Location privacy awareness on geo-social networks enhancing awareness with feedback solutions." Thesis, Cardiff University, 2017. http://orca.cf.ac.uk/110806/.
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Users of GeoSocial Networks (GeoSNs) share their personal location information with other users online. GeoSNs use spatiotemporal histories of users and other semantic information from their tags and comments to build location-based profiles and to offer personalised services and interaction experiences. However, such location-based profiles can potentially be used to extract private information about users, that they may not wish to disclose, and can thus pose a threat to their privacy. Users are generally unaware of the extent of data they are sharing and its potential implicit content. Studies have also shown that users are concerned about their location privacy and that current solutions offered by GeoSNs, namely privacy policies and privacy settings, do not effectively address their concerns. The focus of this thesis is on addressing the problem of location privacy on GeoSNs through enhancing users’ location privacy awareness of potential risks to allow them to make informed consent about their location disclosure. Therefore, this work firstly studies the link between location information disclosure and the risks to personal privacy and evaluates the level of user awareness and their attitude to privacy implications of sharing location information in GeoSNs. Factors contributing to the location privacy problem are identified, including those stemming from the nature of the data collection procedures and the modes of using the application by the users. Systematic user studies were carried out that showed the limitation in users’ awareness of the extent of the data and information they are disclosing. Thus, to enable location privacy awareness, a data-driven approach is undertaken to assessing the threat associated with the exposure of location-related personal information. Based on that, a privacy threat model is proposed that takes into account the types of shared data, its visibility by possible adversaries and the user’s awareness of the disclosed information. In addition, privacy feedback solutions are proposed to address the gaps in user awareness by revealing the level of risk to their privacy associated with exposing different types of location-related personal information. These solutions allow users to view their geo-profiles collected and inferred based on their location-sharing actions on GeoSNs and notify them about who of the other users can see their information. User-based experiments were used to evaluate the effectiveness of the proposed solutions using surveys, interviews, and prototypes along with realistic users’ data. Results demonstrate clearly the significance of the proposed solutions on enhancing user awareness. Employing the methods proposed in this thesis will thus enable users to effectively manage their privacy and make informed decisions about their location disclosure on GeoSNs.
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Snow, Bradford Jason. "A Personal Place Awareness System." Miami University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=miami1113852696.
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Balachandran, Anand. "Incorporating location-awareness in public-area wireless networks /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2003. http://wwwlib.umi.com/cr/ucsd/fullcit?p3102542.
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Daruwala, Yohann. "A Constructive Memory Architecture for Context Awareness." Thesis, The University of Sydney, 2008. http://hdl.handle.net/2123/2250.
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Context-aware computing is a mobile computing paradigm in which applications can discover, use, and take advantage of contextual information, such as the location, tasks and preferences of the user, in order to adapt their behaviour in response to changing operating environments and user requirements. A problem that arises is the inability to respond to contextual information that cannot be classified into any known context. Many context-aware applications require all discovered contextual information to exactly match a type of context, otherwise the application will not react responsively. The ability to learn and recall contexts based on the contextual information discovered has not been very well addressed by previous context-aware applications and research. The aim of this thesis is to develop a component middleware technology for mobile computing devices for the discovery and capture of contextual information, using the situated reasoning concept of constructive memory. The research contribution of this thesis lies in developing a modified architecture for context-aware systems, using a constructive memory model as a way to learn and recall contexts from previous experiences and application interactions. Using a constructive memory model, previous experiences can be induced to construct potential contexts, given a small amount of learning and interaction. The learning process is able to map the many variations of contextual information currently discovered by the user with a predicted type of context based on what the application has stored and seen previously. It only requires a small amount of contextual information to predict a context, something common context-aware systems lack, as they require all information before a type of context is assigned. Additionally, some mechanism to reason about the contextual information being discovered from past application interactions will be beneficial to induce contexts for future experiences.
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Daruwala, Yohann. "A Constructive Memory Architecture for Context Awareness." University of Sydney, 2008. http://hdl.handle.net/2123/2250.
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Master of Philosophy (Architecture)Context-aware computing is a mobile computing paradigm in which applications can discover, use, and take advantage of contextual information, such as the location, tasks and preferences of the user, in order to adapt their behaviour in response to changing operating environments and user requirements. A problem that arises is the inability to respond to contextual information that cannot be classified into any known context. Many context-aware applications require all discovered contextual information to exactly match a type of context, otherwise the application will not react responsively. The ability to learn and recall contexts based on the contextual information discovered has not been very well addressed by previous context-aware applications and research. The aim of this thesis is to develop a component middleware technology for mobile computing devices for the discovery and capture of contextual information, using the situated reasoning concept of constructive memory. The research contribution of this thesis lies in developing a modified architecture for context-aware systems, using a constructive memory model as a way to learn and recall contexts from previous experiences and application interactions. Using a constructive memory model, previous experiences can be induced to construct potential contexts, given a small amount of learning and interaction. The learning process is able to map the many variations of contextual information currently discovered by the user with a predicted type of context based on what the application has stored and seen previously. It only requires a small amount of contextual information to predict a context, something common context-aware systems lack, as they require all information before a type of context is assigned. Additionally, some mechanism to reason about the contextual information being discovered from past application interactions will be beneficial to induce contexts for future experiences.
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Guerra, Anna <1987>. "Location and Map Awareness Technologies in Next Wireless Networks." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7554/1/Guerra_Anna_tesi.pdf.
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In a future perspective, the need of mapping an unknown indoor environment, of localizing and retrieving information from objects with zero costs and efforts could be satisfied by the adoption of next 5G technologies. Thanks to the mix of mmW and massive arrays technologies, it will be possible to achieve a higher indoor localization accuracy without relying on a dedicated infrastructure for localization but exploiting that designed for communication purposes. Besides users localization and navigation objectives, mapping and thus, the capability of reconstructing indoor scenarios, will be an important field of research with the possibility of sharing environmental information via crowd-sourcing mechanisms between users. Finally, in the Internet of Things vision, it is expected that people, objects and devices will be interconnected to each other with the possibility of exchanging the acquired and estimated data including those regarding objects identification, positioning and mapping contents. To this end, the merge of RFID, WSN and UWB technologies has demonstrated to be a promising solution. Stimulated by this framework, this work describes different technological and signal processing approaches to ameliorate the localization capabilities and the user awareness about the environment. From one side, it has been focused on the study of the localization and mapping capabilities of multi-antenna systems based on 5G technologies considering different technological issues, as for example those related to the existing available massive arrays. From the other side, UWB-RFID systems relying on passive communication schemes have been investigated in terms of localization coverage and by developing different techniques to improve the accuracy even in presence of NLOS conditions.
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Guerra, Anna <1987>. "Location and Map Awareness Technologies in Next Wireless Networks." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7554/.
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In a future perspective, the need of mapping an unknown indoor environment, of localizing and retrieving information from objects with zero costs and efforts could be satisfied by the adoption of next 5G technologies. Thanks to the mix of mmW and massive arrays technologies, it will be possible to achieve a higher indoor localization accuracy without relying on a dedicated infrastructure for localization but exploiting that designed for communication purposes. Besides users localization and navigation objectives, mapping and thus, the capability of reconstructing indoor scenarios, will be an important field of research with the possibility of sharing environmental information via crowd-sourcing mechanisms between users. Finally, in the Internet of Things vision, it is expected that people, objects and devices will be interconnected to each other with the possibility of exchanging the acquired and estimated data including those regarding objects identification, positioning and mapping contents. To this end, the merge of RFID, WSN and UWB technologies has demonstrated to be a promising solution. Stimulated by this framework, this work describes different technological and signal processing approaches to ameliorate the localization capabilities and the user awareness about the environment. From one side, it has been focused on the study of the localization and mapping capabilities of multi-antenna systems based on 5G technologies considering different technological issues, as for example those related to the existing available massive arrays. From the other side, UWB-RFID systems relying on passive communication schemes have been investigated in terms of localization coverage and by developing different techniques to improve the accuracy even in presence of NLOS conditions.
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Rametta, Corrado. "On Location-Awareness in P2P Wireless Mesh Community Networks." Doctoral thesis, Università di Catania, 2012. http://hdl.handle.net/10761/1093.
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Peer-to-Peer networks, due to their capacity of providing a good substrate for large scale contents-resources sharing and distribution applications, represent an interesting and promiscuous research area of the ICT and could play a key role in the diffusion of the mesh networking paradigm, meeting the growing need of communication and resource sharing among people anywhere and anytime. Extending the P2P paradigm to wireless networks presents several difficulties due to their dynamic, multi hop and often power and computational constrained nature. We provide some fundamental guidelines in designing P2P overlay schemes for WMCNs, reaching the conclusion that a hierarchical, structured, and distributed-hash-table (DHT) based architecture, exploiting location-awareness, could represent a suitable solution able to guarantee high resilience, fault tolerance, flexibility and scalability, at the cost of supporting a moderate overhead for overlay and nodes' churning management. We studied and evaluated a location-aware DHT-based P2P scheme, called Georoy. We also introduced some improvements allowing its applicability to wireless mesh networks and opportunistic rural scenarios.
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Hutchinson, Harriet. "Location awareness in multi-agent control of distributed energy resources." Thesis, Durham University, 2017. http://etheses.dur.ac.uk/12291/.
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The integration of Distributed Energy Resource (DER) technologies such as heat pumps, electric vehicles and small-scale generation into the electricity grid at the household level is limited by technical constraints. This work argues that location is an important aspect for the control and integration of DER and that network topology can inferred without the use of a centralised network model. It addresses DER integration challenges by presenting a novel approach that uses a decentralised multi-agent system where equipment controllers learn and use their location within the low-voltage section of the power system. Models of electrical networks exhibiting technical constraints were developed. Through theoretical analysis and real network data collection, various sources of location data were identified and new geographical and electrical techniques were developed for deriving network topology using Global Positioning System (GPS) and 24-hour voltage logs. The multi-agent system paradigm and societal structures were examined as an approach to a multi-stakeholder domain and congregations were used as an aid to decentralisation in a non-hierarchical, non-market-based approach. Through formal description of the agent attitude INTEND2, the novel technique of Intention Transfer was applied to an agent congregation to provide an opt-in, collaborative system. Test facilities for multi-agent systems were developed and culminated in a new embedded controller test platform that integrated a real-time dynamic electrical network simulator to provide a full-feedback system integrated with control hardware. Finally, a multi-agent control system was developed and implemented that used location data in providing demand-side response to a voltage excursion, with the goals of improving power quality, reducing generator disconnections, and deferring network reinforcement. The resulting communicating and self-organising energy agent community, as demonstrated on a unique hardware-in-the-loop platform, provides an application model and test facility to inspire agent-based, location-aware smart grid applications across the power systems domain.
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Burbey, Ingrid. "Predicting Future Locations and Arrival Times of Individuals." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/27551.
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This work has two objectives: a) to predict people's future locations, and b) to predict when they will be at given locations. Current location-based applications react to the user's current location. The progression from location-awareness to location-prediction can enable the next generation of proactive, context-predicting applications.
Existing location-prediction algorithms predict someone's next location. In contrast, this dissertation predicts someone's future locations. Existing algorithms use a sequence of locations and predict the next location in the sequence. This dissertation incorporates temporal information as timestamps in order to predict someone's location at any time in the future. Sequence predictors based on Markov models have been shown to be effective predictors of someone's next location. This dissertation applies a Markov model to two-dimensional, timestamped location information to predict future locations.
This dissertation also predicts when someone will be at a given location. These predictions can support presence or understanding co-workers’ routines. Predicting the times that someone is going to be at a given location is a very different and more difficult problem than predicting where someone will be at a given time. A location-prediction application may predict one or two key locations for a given time, while there could be hundreds of correct predictions for times of the day that someone will be in a given location. The approach used in this dissertation, a heuristic model loosely based on Market Basket Analysis, is the first to predict when someone will arrive at any given location.
The models are applied to sparse, WiFi mobility data collected on PDAs given to 275 college freshmen. The location-prediction model predicts future locations with 78-91% accuracy. The temporal-prediction model achieves 33-39% accuracy. If a tolerance of plus/minus twenty minutes is allowed, the prediction rates rise to 77%-91%.
This dissertation shows the characteristics of the timestamped, location data which lead to the highest number of correct predictions. The best data cover large portions of the day, with less than three locations for any given timestamp.Ph. D.
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Pantagaki, Konstantina. "Whereabouts Screens: Supporting social interaction and location awareness at the workplace." Thesis, KTH, Medieteknik och interaktionsdesign, MID, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-190019.
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The Whereabouts Screens are a minimalistic publishing system offering location awareness at the workplace. The employees can share information with their colleagues, relevant mostly to their whereabouts, by publishing it on several situated displays located around the office space. The Whereabouts Screens have been installed with minimal changes since 2012 at the Mobile Life center and as a relatively new system, it has still not reached its full potential. Despite its “primitive” characteristics however, the employees show a continued interest in using them. Based on related research on situated displays the research questions to be answered are: What do the semi-public situated displays in the workplace have to offer to their users? How can they be augmented and better integrated in their environment using the existing technology? To investigate these questions, Human-Computer Interaction methods such as in-situ observations, interviews, a design workshop and prototyping were used. The result was a prototype of an augmented system, in the form of a notice board where the users can post notes of different types (text, images, etc.). The board is extended beyond the limits of the screen with LEDs. The intensity and colors of the LEDs are affected by the use of the system, and illuminate the area around the screen. The augmented Whereabouts Screens aim to promote social interaction and location awareness at the workplace. They were evaluated through user testing and the first results show a positive reception from the users.Whereabouts Skärmar är ett minimalistiskt publicerings-system som bjuder närvarokännedom på arbetsplatsen. De anställda kan dela information med sina kollegor, mestadels kopplat till vad de befinner sig, genom att publicera det på flera skärmar belägna runt om på arbetsplatsen. Whereabouts Skärmar har funnits installerade med minimala förändringar sedan 2012 vid Mobile Life centret men har som ett relativt nytt system ännu inte nått sin fulla potential. Trots begränsningar i systemet visar anställda ett fortsatt intresse av att använda dem. Baserat på relaterad forskning kring situerade skärmar tar sig uppsatsen an två frågeställningar: Vad har semi-publika situerade skärmar på arbetsplatsen att erbjuda sina användare? Hur kan deras funktionalitet utökas och integreras bättre i omgivningen med hjälp av befintlig teknik? För att undersöka dessa frågor, används människa-datorinteraktion metoderna in-situ observationer, intervjuer, designworkshops och prototypbyggande använts. Resultatet är en prototyp av ett system med utökad funktionalitet i form av en anslagstavla där användare kan lägga upp anteckningar av olika slag (text, bilder, etc.). Anslagstavlan sträcker sig över gränserna för skärmen med LEDljusen. Intensitet och färger hos LEDljusen påverkas av användningen av systemet, och lyser upp området runt skärmen. De utökade Whereabouts skärmarna syftar till att understödja social interaktion och närvarokännedom på arbetsplatsen. De utvärderades genom användartester och de första resultaten visar på ett positivt mottagande av användarna.
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Englund, Fredrik. "Smart location-awareness and -triggers on mobile devices with geofence technology." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-174856.
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Today we have many mobile applications that use location services. ith the increasing rate of applications per phone and the act that each phone has a limited amount of power, it becomes more nd more important that we see the battery as the limited resource it ruly is and that we should start to think about how we are spending t. Therefore this thesis will investigate how much power the location ervices actually need to work properly. In addition to the power consumption his thesis will also investigate how accurate each location ervice is so that we can make a statement about what we get for the mount of battery consumed.Idag så finns det många mobilapplikationer som använder sig av lokaliseringstjänster. Idag när kvoten av applikationer per mobil ökar stadigt och det faktum att mobiler endast har en begränsad batterikappasitet, å blir det mer och mer viktigt att vi verkligen ser batteriet som en begränsad resurs som vi ska vara sparsamma med. därför kommer detta examensarbete att handla om hur mycket batterikapasitet om lokaliseringstjänster verkligen behöver använda för att fungera på ett bra sätt. Detta examensarbete kommer också att undersöka vilken precision varje service har så att vi kan bestämma å ett ungefär vad vi får för vilken batterikonsumtion.
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Westerlund, Markus. "The Design & User Experiences of a Mobile Location-awareness Application: Meet App." Thesis, Södertörn University College, School of Communication, Media and it, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-3773.
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This paper intends to describe the work and result of the design project Meet App. Meet App lets users interact around their current locations in a direct manner. The user experience is evaluated to get an understanding of the usefulness and interaction with this type of design. The project is related to the context-awareness research field where findings put the project in a greater whole. The result indicates usefulness and enjoyment interacting with the application, but because of the low number of participants the findings cannot be validated.
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Abell, Drew Q. "Mobile Tracking and Location Awareness in Disaster Relief and Humanitarian Assistance Situations." Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/17311.
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Approved for public release; distribution is unlimitedSituational awareness is one of the most important aspects to a commander in any type of mission, be it humanitarian relief, disaster recovery, or armed conflict. Through the past several decades, with the use of technology, we have been able to develop systems that help improve the commanders situational awareness of the mission. One of the major problems with this has been that every organization uses different technology to communicate, which causes interoperability issues and a lack of a Common Operational Picture (COP) between them. Commercial Off-the-Shelf (COTS) equipment that is relatively inexpensive, easily obtainable, simple to operate, and rapidly distributable to different organizations can help bridge this gap in the overall mission situational awareness. The goal of this research is to explore how to effectively implement Android-based devices to provide the tracking of team members and locations of significant activities/equipment graphically through the use of GPS, Google Maps, and custom overlays to increase situational awareness, thereby constructing a COP to assist in disaster relief efforts.
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Westerlund, Markus, Maria Normark, and Lars Erik Holmquist. "Express Location : Supporting Coordination of Mobile Delivery Work." Södertörns högskola, Medieteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-12099.
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This paper introduces Express Location, a mobile web application, supporting drivers in delivery service in the daily coordination of work. Remote communication and cooperation takes place on a shared map view around the drivers’ locations and next stop, through a drawing/doodling tool and multiple visual object representations. The aim is to understand the working situation and the use of locations in the daily work to better support the coordination of mobile delivery work.© (2011) ACM. This is the author’s version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in CSCW '11 Proceedings of the ACM 2011 conference on Computer supported cooperative work http://doi.acm.org/10.1145/1958824.1958956
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Sampat, Miten. "Enabling Locative Experiences." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/35975.
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The appropriate framework to capture and share location information with mobile applications enable the development of interfaces and interface techniques that empower users to obtain and share information on the go. As such, the work in this thesis makes two major contributions. First is the SeeVT framework, a locative backbone that uses currently-available data and equipment in the Virginia Tech and Blacksburg VA environments (e.g., wireless signal triangulation, GPS signals) to make available to applications the location of the device in use. Applications built on this framework have available knowledge of the region in which the userâ s device is located. Second is a set of four applications built on the SeeVT framework: SeeVT â Alumni Edition (a guide for alumni returning to campus, often after lengthy absences), the Newman Project (a library information system for finding books and other library resources), VTAssist (a information sharing system for disabled users), and SeeVT-Art (a guide for users in our local inn and conference center to learn about the art on display). Key in this contribution is our identification and discussion of three interface techniques that emerged from our development efforts: an images-first presentation of information, a lightweight mobile augmented reality style of interaction, and locative content affordances that provide ways to quickly input focused types of information in mobile situations.Master of Science
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Chaube, Vineeta. "Understanding and Designing for Perceptions of Trust in Rideshare Programs." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/34497.
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Traffic congestion, high gas price and inadequate public transportation are major challenges for any country, business or individual. The traditional approach to solving these problems has been to improve public transportation and use greener energy. These approaches require huge investment, research and time, and can only be carried out by governments or businesses. An alternative solution seeks to reduce the number of vehicles on the road based on ridesharing. Nevertheless, ridesharing is not a popular form of public transportation. A ridesharing application involves planning and collaboration in setting up rides. Some of the concerns of users of these applications are social discomfort that arises due to lack of trust amongst co-passengers and inconvenience in scheduling rides.
In this work we are trying to understand the perceptions of trust in a software application that integrates collaboration and social networks. We conducted a rideshare needs assessment survey conducted within the Virginia Tech community. The purpose behind this survey was to understand commuters travel patterns, their needs and to identify their preferences for private vehicles and public transit for a variety of travel needs. The survey results indicate that users are willing to increase participation in ridesharing programs if three core issues are addressed trust, convenience and incentives. Based on the results and analysis of our survey results we present an iPhone based ridesharing application that would leverage social networks to embed trust. To overcome the complexity in scheduling rides, we have made our application available on mobile phones (iPhone) so that users are connected on the go and make use of GPS for location awareness to plan their rides instantaneously. Our social software application is easy and intuitive to use, helps users find trusted rideshares and reduces the carbon footprint of the individual.Master of Science
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Giunta, Alberto. "Sviluppo di un modulo di real-time Location-awareness a supporto dei sistemi di soccorso." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016.
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Negli ultimi decenni l'avanzamento tecnologico nei sistemi mobile ha avuto un notevole impatto sui sistemi informatici comunemente utilizzati nel lavoro di tutti i giorni dal personale in ambito sanitario.
Una branca del settore sanitario su cui è posta particolare attenzione quando si parla di nuove tecnologie, e del loro possibile campo di applicazione, è quella delle missioni di soccorso al verificarsi di emergenze, ove con emergenze sono intesi catastrofi naturali o scenari di guerra.
Il settore della ricerca è tutt'ora al lavoro nello sviluppo di sistemi che aiutino i partecipanti a questo tipo di missioni in diversi modi: si va dal facilitare l'inter-comunicazione tra i membri di un team sparsi sul campo, all'aumentare le capacità dei soccorritori tramite l'utilizzo di dispositivi wearable, fino a sistemi che facilitino la condivisione di informazioni cliniche sui pazienti, in modo tale da far sì che ogni operatore possa verificare lo stato di salute di qualsiasi paziente e sapere quali trattamenti e protocolli sono già stati effettuati.
Ogni situazione d'emergenza ha delle specifiche caratteristiche, dipendentemente dal paese in cui ha luogo, dall'efficienza dei soccorsi e dalla gravità del problema, e i sistemi sopracitati devono essere in grado di essere utilizzati in ognuna di queste, adattandosi bene a tutte questi fattori esterni.
Il lavoro svolto per la stesura di questa tesi si va a posizionare esattamente in questo contesto, ed è mirato allo sviluppo di un modulo capace di gestire la Geolocalizzazione di operatori e Triage in maniera per lo più indipendente dal resto del sistema e dagli operatori stessi, proponendo una comunicazione real time tra le varie componenti presenti (Operatori e Control Room).
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Schäfer, Matthias [Verfasser], and Jens [Akademischer Betreuer] Schmitt. "Mobility Improves the Security of Location Awareness in Wireless Networks / Matthias Schäfer ; Betreuer: Jens Schmitt." Kaiserslautern : Technische Universität Kaiserslautern, 2018. http://d-nb.info/116913260X/34.
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Abumansoor, Osama. "A Design and Evaluation of a Secure Neighborhood Awareness Framework for Vehicular Ad-Hoc Networks." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31171.
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Vehicular ad-hoc networks (VANETs) are envisioned to provide many road and safety applications that will improve drivers' awareness and enhance the driving experience. Many of proposed applications are location-based that depend on sharing the location information of vehicles and events among neighboring nodes. The location-based applications should provide vehicle operators with knowledge of the current surrounding conditions to help them make appropriate traveling decisions, such as avoiding traffic congestion. Drivers expect to receive accurate and reliable information from other vehicles. Therefore, securing localization service integrity is important to support a VANET's overall system reliability.
In this thesis, we study the exchanged location information in VANETs and designed a framework to prevent potential security threats that will violate users' privacy and overcome limitations that can impact the exchanged data integrity and reliability. The solution developed a secure neighborhood awareness service and shared localization information management protocol in a VANET. The proposed framework is constructed through several components: (i) a location verification protocol that will secure location information by providing a non-line-of-sight (NLOS) verification protocol to overcome moving obstacle effects; (ii) privacy-preserving location information management to detect data inconsistency and provide a recovery process while preventing attackers from tracking individual vehicles; (iii) a trust model evaluation mechanism based on neighborhood awareness; (iv) an adaptive beacon protocol that will reduce the number of messages and provide quality of service(QoS) control for network managers and authorities. We also propose a security evaluation model that quantifies the security attributes for the localization service in a VANET. The model will help evaluate an integrated security measures that are provided by different components of the network services.
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Riedel, Alexander. "Collaborative scheduling using context-awarenes." Thesis, KTH, Kommunikationssystem, CoS, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91110.
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Today most cellular phones, personal digital assistants, PCs, etc. offer an electronic calendar. Electronic calendars are especially useful for people who have many different meetings each day and who need to know when the meetings start and who is involved in each meeting. With the aid of a program a calendar can be published on web, shared with other people to enable collaboration, or synchronized between different devices. Current calendaring software offers an almost unlimited set of features and services. However, today such software does not utilize context-awareness, for example exploiting knowledge of the user's location. When people collaborate they often need to meet in order to do a task jointly or discuss something. It can be difficult to plan a meeting because people have booked their available time differently in their calendars. Because of this there is a need to automatically schedule certain types of meetings. In this thesis, a program that schedules meetings automatically is designed, implemented and evaluated. This program facilitates collaboration by finding a commonly available time and/or meeting place for a meeting, thus making it easier for the meeting people to agree. When meetings are scheduled without requiring too much attention from a user and the number of human errors can be reduced while planing a meeting, users do not need to expends as much effort as it goes into scheduling meetings today. Because today a company planing a collaboration task collectively spends a lot of time and effort searching for a commonly available time with this effort increasing non-linearly with increased numbers of participants companies can obviously benefit from automated scheduling systems. Testing with the application reveals that incorporating of user's location information into scheduling is a great tool to facilitate collaboration. The survey also shows the need for extensions to the developed application; with the new features utilizing location information. The evaluation also shows that the developed scheduling program has managed to reduce the time and effort spent while scheduling meetings.Idag finns det en elektronisk kalender i de flesta mobiltelefoner, datorer och PDA:n. Elektroniska kalendrar är användbara framför allt för människor som har flera möten varje dag och som behöver veta när mötena startar vilka som ska delta. Vissa elektroniska kalendrar kan publiceras på webben, delas med andra människor för att möjliggöra samarbete och synkroniseras mellan till exempel mobiltelefoner, datorer och PDA:n. Kalendermjukvara erbjuder idag ett nästan obegränsat antal funktioner och nyttiga tjänster. Denna typ av mjukvara är dock generellt sett inte medveten om information såsom användarens position, vilket i sammanhanget kalls context-awareness. När människor ska samarbeta krävs ofta att de träffas för att utföra uppgifter tillsammans eller diskutera viktiga ämnen. För att kunna ha möten krävs att möten först planeras, vilket kan vara svårt då de inbjudna är olika uppbokade i sina respektive kalendrar. Av den anledningen finns ett behov av att automatisera schemaläggningen för vissa typer av möten. I detta examensarbete skall ett program för automatisk schemaläggning designas, utvecklas och evalueras. Programmet skall underlätta samarbete mellan mötesdeltagare genom att ta över uppgiften att hitta en gemensam tid och/eller plats för ett möte. Programmet skall därmed också underlätta för mötesdeltagarna att komma överens. När möten kan schemaläggas utan att det kräver för mycket uppmärksamhet från användarna och antalet mänskliga fel kan reduceras när möten planeras, behöver man inte lägga lika mycket arbete, som idag, på att schemalägga möten. Eftersom det för tillfället krävs mycket tid och resurser för ett företag för att schemalägga ett möte, samtidigt som tiden för att planera ett möte inte ökar linjärt med antalet deltagare, kommer företag antagligen att dra nytta av ett automatiserat schemaläggningssystem. En undersökning genomförd av ett antal testpersoner som använt applikationen visade på att användarens position var en viktig parameter som kunde förbättra schemaläggningen av möten. Undersökningen visade också att applikationen hade ett stort behov av att vidareutvecklas genom nya potentiella funktioner som tar hänsyn till användarens position. Men viktigast av allt så visade undersökningen på att applikationen lyckats med att reducera tiden det tar för att planera möten.
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Lehmann, Matheus Brenner. "PDRM : a proactive data replication mechanism to improve content mobility support in NDN using location awareness." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/179769.
Full textAbstract:
O problema de lidar com a mobilidade dos usuários existe desde que os dispositivos móveis se tornaram capazes de lidar com conteúdo multimídia e ainda é um dos desafios mais relevantes na área de redes de computadores. A arquitetura de Internet convencional é inadequada em lidar com um número cada vez maior de dispositivos móveis que estão tanto consumindo quanto produzindo conteúdo. Named Data Networking (NDN) é uma arquitetura de rede que pode potencialmente superar este desafio de mobilidade. Ela suporta a mobilidade do consumidor nativamente, mas não oferece o mesmo nível de suporte para a mobilidade de conteúdo. A mobilidade de conteúdo exige garantir que os consumidores consigam encontrar e recuperar o conteúdo desejado mesmo quando o produtor correspondente (ou o hospedeiro principal) não estiver disponível. Nesta tese, propomos o PDRM (Proactive Data Replication Mechanism), um mecanismo de replicação de dados proativo e consciente de localização, que aumenta a disponibilidade de conteúdo através da redundância de dados no contexto da arquitetura NDN. Ele explora os recursos disponíveis dos usuários finais na vizinhança para melhorar a disponibilidade de conteúdo, mesmo no caso da mobilidade do produtor. Ao longo da tese, discutimos o projeto do PDRM, avaliamos o impacto do número de provedores disponíveis na vizinhança e a capacidade de cache na rede em sua operação e comparamos seu desempenho com NDN padrão e duas propostas do estado-da-arte. A avaliação indica que o PDRM melhora o suporte à mobilidade de conteúdo devido ao uso de informações de popularidade dos objetos e recursos extras na vizinhança para ajudar a replicação pró-ativa. Os resultados mostram que o PDRM pode reduzir os tempos de download até 53,55%, o carregamento do produtor até 71,6%, o tráfego entre domínios até 46,5% e a sobrecarga gerada até 25% em comparação com NDN padrão e os demais mecanismos avaliados.The problem of handling user mobility has been around since mobile devices became capable of handling multimedia content and is still one of the most relevant challenges in networking. The conventional Internet architecture is inadequate in dealing with an ever-growing number of mobile devices that are both consuming and producing content. Named Data Networking (NDN) is a network architecture that can potentially overcome this mobility challenge. It supports consumer mobility by design but fails to offer the same level of support for content mobility. Content mobility requires guaranteeing that consumers manage to find and retrieve desired content even when the corresponding producer (or primary host) is not available. In this thesis, we propose PDRM, a Proactive and locality-aware Data Replication Mechanism that increases content availability through data redundancy in the context of the NDN architecture. It explores available resources from end-users in the vicinity to improve content availability even in the case of producer mobility. Throughout the thesis, we discuss the design of PDRM, evaluate the impact of the number of available providers in the vicinity and in-network cache capacity on its operation, and compare its performance to Vanilla NDN and two state-of-the-art proposals. The evaluation indicates that PDRM improves content mobility support due to using object popularity information and spare resources in the vicinity to help the proactive replication. Results show that PDRM can reduce the download times up to 53.55%, producer load up to 71.6%, inter-domain traffic up to 46.5%, and generated overhead up to 25% compared to Vanilla NDN and other evaluated mechanisms.
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Yu, Zehao. "Towards location-awareness in next generation wireless networks : a new approach based on channel state information." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127117.
Full textAbstract:
Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, May, 2020Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 69-78).
Location-awareness in next generation wireless networks will be a key enabler for numerous emerging applications. Recently, a novel approach to localization based on soft information (SI), exploiting all positional information inherent in measurement and contextual data, has been proposed. This thesis further develops SI-based localization by establishing a new approach relying on channel state information (CSI) measurements. In particular, we design an efficient joint message-passing (MP) localization algorithm, which consists of two layers: the transformation layer and the estimation layer. The transformation layer extracts SI of the channel impulse response (CIR) from CSI measurements using a sparsity promoting prior model, which addresses the difficulty of unknown number of multipath in estimating the CIR. The estimation layer infers node positions based on the SI of the CIR using a delay-origin uncertainty model, which describes the conditional distribution of the delays in the CIR given node positions. Simulation results using QuaDriGa channel simulator show that our localization algorithm achieves decimeter-level localization accuracy for both Wi-Fi and mmWave signals, which outperforms conventional algorithms.
by Zehao Yu.
S.M.
S.M. Massachusetts Institute of Technology, Department of Aeronautics and Astronautics
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Byrd, Valerie Rosengarn. "The integration of Situational Awareness Beacon with Reply (SABER) with the Enhanced Position Location Reporting System (EPLRS)." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA326103.
Full textAbstract:
Thesis (M.S. in Systems Technology (Space Systems Operations)) Naval Postgraduate School, December 1996."December 1996." Thesis advisor(s): Dan C. Boger. Includes bibliographical references (p. 69-71). Also available online.
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Moreno, Torres Karina. "On The Market For Successful Uptake of Mobile Social Software." Thesis, University of Gävle, Department of Mathematics, Natural and Computer Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-789.
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For the past recent years mobile developers and content providers have been aware of consumers’ engagement in online social networking. New opportunities are presented when using a mobile device as a medium for social interaction, also referred to as mobile social software. An ever growing effort aimed at various mobile design processes and applications have taken place. To achieve a widespread adoption of mobile social software amongst the main stream mobile consumer, several problem areas have to be taken into consideration, such as the technological possibilities and limitations of mobile phones, security issues regarding user privacy and the different aspects of consumers appeal for social media. This research looks into the overall situation of the current field of research and focuses on the interests in mobile social software amongst users. The study was geographically limited to Malmö, Sweden and focused on a population at the ages of 13-18.
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Rouf, Ishtiaq. "Statistical Analysis of Wireless Communication Systems Using Hidden Markov Models." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/43718.
Full textAbstract:
This thesis analyzes the use of hidden Markov models (HMM) in wireless communication systems. HMMs are a probabilistic method which is useful for discrete channel modeling. The simulations done in the thesis verified a previously formulated methodology. Power delay profiles (PDP) of twelve wireless receivers were used for the experiment. To reduce the computational burden, binary HMMs were used. The PDP measurements were sampled to identify static receivers and grid-based analysis. This work is significant as it has been performed in a new environment.
Stochastic game theory is analyzed to gain insight into the decision-making process of HMMs. Study of game theory is significant because it analyzes rational decisions in detail by attaching risk and reward to every possibility.
Network security situation awareness has emerged as a novel application of HMMs in wireless networking. The dually stochastic nature of HMMs is applied in this process for behavioral analysis of network intrusion. The similarity of HMMs to artificial neural networks makes it useful for such applications. This application was performed using simulations similar to the original works.
Master of Science
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Montesi, Stefano. "Tecnologie per la mobilità verso un middleware general-purpose." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7037/.
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L'obiettivo della tesi è esplorare i più avanzati dispositivi, sensori e processori per la computazione spaziale, correlarli con i modelli di spatial computing, e derivarne un'architettura concettuale di middleware distribuito che possa supportare le più avanzate applicazioni in mobilità.
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Zuo, Jian. "The Frequency Monitor Network (FNET) Design and Situation Awareness Algorithm Development." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/26721.
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Wide Area Measurements (WAMs) have been widely used in the energy management system (EMS) of power system for monitoring, operation and control. In recent years, the advent of synchronized Phasor Measurements Unit (PMU) has added another dimension to the field of wide-area measurement. However, the high cost of the PMU, which includes the manufacture and deployment fee, is a hurdle to the wide use of the PMU in power systems. Unlike traditional PMUs, the frequency monitoring network (FNET) developed by the Virginia Tech Power IT lab is an Internetâ based, GPSâ synchronized, wide-area frequency monitoring network deployed at the distribution level, providing a low-cost and easily deployable WAMs solution. In this dissertation, the research work can be categorized into two parts: FNET Design and Situation Awareness Algorithm Development.Ph. D.
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Mordenti, Brando. "Ideazione di sistemi distribuiti collaborativi basati su realta aumentata mobile: un caso di studio, con approfondimento relativo all'interfaccia utente." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9246/.
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L'obiettivo di questa tesi è quello di esplorare l'ideazione di sistemi software collaborativi innovativi basati su smart-glasses e forme di realtà aumentata mobile. In particolare, è stato formulato un caso di studio che cattura alcuni aspetti essenziali di questi sistemi: un'applicazione nel quale più utenti dotati di smart glasses si muovono in una zona precisa cercando di raggiungere tutti i punti d'interesse preimpostati in fase di inizializzazione e ottendendo le ricompense contenute dentro agli scrigni situati nei suddetti punti. Lo specifico caso di studio si occupa di approfondire gli aspetti relativi all'Interfaccia Utente, mentre precedentemente erano state affrontate le parti riguardanti la comunicazione e la cooperazione. L'applicazione è location-based e si serve delle tecniche di geolocalizzazione GPS ed è hands-free perché l'interfaccia grafica è mostrata all'utente tramite lo schermo degli smart-glasses.
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Palanisamy, Balaji. "Cost-effective and privacy-conscious cloud service provisioning: architectures and algorithms." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/52157.
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Cloud Computing represents a recent paradigm shift that enables users to share and remotely access high-powered computing resources (both infrastructure and software/services) contained in off-site data centers thereby allowing a more efficient use of hardware and software infrastructures. This growing trend in cloud computing, combined with the demands for Big Data and Big Data analytics, is driving the rapid evolution of datacenter technologies towards more cost-effective, consumer-driven, more privacy conscious and technology agnostic solutions.
This dissertation is dedicated to taking a systematic approach to develop system-level techniques and algorithms to tackle the challenges of large-scale data processing in the Cloud and scaling and delivering privacy-aware services with anytime-anywhere availability. We analyze the key challenges in effective provisioning of Cloud services in the context of MapReduce-based parallel data processing considering the concerns of cost-effectiveness, performance guarantees and user-privacy and we develop a suite of solution techniques, architectures and models to support cost-optimized and privacy-preserving service provisioning in the Cloud.
At the cloud resource provisioning tier, we develop a utility-driven MapReduce Cloud resource planning and management system called Cura for cost-optimally allocating resources to jobs. While existing services require users to select a number of complex cluster and job parameters and use those potentially sub-optimal per-job configurations, the Cura resource management achieves global resource optimization in the cloud by minimizing cost and maximizing resource utilization. We also address the challenges of resource management and job scheduling for large-scale parallel data processing in the Cloud in the presence of networking and storage bottlenecks commonly experienced in Cloud data centers. We develop Purlieus, a self-configurable locality-based data and virtual machine management framework that enables MapReduce jobs to access their data either locally or from close-by nodes including all input, output and intermediate data achieving significant improvements in job response time.
We then extend our cloud resource management framework to support privacy-preserving data access and efficient privacy-conscious query processing. Concretely, we propose and implement VNCache: an efficient solution for MapReduce analysis of cloud-archived log data for privacy-conscious enterprises. Through a seamless data streaming and prefetching model in VNCache, Hadoop jobs begin execution as soon as they are launched without requiring any apriori downloading. At the cloud consumer tier, we develop mix-zone based techniques for delivering anonymous cloud services to mobile users on the move through Mobimix, a novel road-network mix-zone based framework that enables real time, location based service delivery without disclosing content or location privacy of the consumers.
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Aldini, Matteo. "Ideazione di sistemi distribuiti collaborativi basati realta aumentata mobile: un caso di studio, con approfondimento relativo al livello delle comunicazioni." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8862/.
Full textAbstract:
Il grande sviluppo a cui stiamo assistendo negli ultimi anni nell'ambito delle tecnologie mobile e del wearable computing apre le porte a scenari innovativi e interessanti per quanto riguarda sistemi distribuiti collaborativi. Le persone possono sempre più facilmente cooperare e scambiarsi informazioni grazie a queste nuove tecnologie e si può pensare allo sviluppo di sistemi che permettano forme molto avanzate di collaborazione facendo leva sull'aspetto hands-free, ovvero sulla possibilità di utilizzare dispositivi che liberino le mani, come i moderni smart-glasses.
Per lo sviluppo di tali sistemi è necessario però studiare nuove tecniche e architetture, in quanto gli strumenti ad oggi a disposizione a supporto della realtà aumentata non sembrano essere del tutto adeguati per tale scopo. Infatti piattaforme come Wikitude o Layar, seppure offrano potenti tecniche di riconoscimento di markers e immagini e di rendering, non offrono quella dinamicità fondamentale per un sistema distribuito collaborativo.
Questo scritto ha lo scopo di esplorare questi aspetti mediante l'ideazione, l'analisi, la progettazione e la prototipazione di un semplice caso di studio ispirato a sistemi collaborativi distribuiti basati su realtà aumentata. In particolare in questo lavoro si porrà l'attenzione sul livello delle comunicazioni e delle infrastrutture di rete.
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Berlini, Filippo. "Ideazione di sistemi distribuiti collaborativi basati su realta aumentata mobile: Un caso di studio, con approfondimento relativo al livello della cooperazione." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8863/.
Full textAbstract:
Dall'inizio del nuovo millennio lo sviluppo di tecnologie nel campo del mobile computing, della rete internet, lo sviluppo dell'Internet of things e pure il cloud computing hanno reso possibile l'innovazione dei metodi di lavoro e collaborazione.
L'evoluzione del mobile computing e della realtà aumentata che sta avvenendo in tempi più recenti apre potenzialmente nuovi orizzonti nello sviluppo di sistemi distribuiti collaborativi.
Esistono oggi diversi framework a supporto della realtà aumentata, Wikitude, Metaio, Layar, ma l'interesse primario di queste librerie è quello di fornire una serie di API fondamentali per il rendering di immagini 3D attraverso i dispositivi, per lo studio dello spazio in cui inserire queste immagini e per il riconoscimento di marker. Questo tipo di funzionalità sono state un grande passo per quanto riguarda la Computer Graphics e la realtà aumentata chiaramente, però aprono la strada ad una Augmented Reality(AR) ancora più aumentata.
Questa tesi si propone proprio di presentare l'ideazione, l'analisi, la progettazione e la prototipazione di un sistema distribuito situato a supporto della collaborazione basato su realtà aumentata.
Lo studio di questa applicazione vuole mettere in luce molti aspetti innovativi e che ancora oggi non sono stati approfonditi né tanto meno sviluppati come API o forniti da librerie riguardo alla realtà aumentata e alle sue possibili applicazioni.
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Vroegop, John. "Nature Connectedness & Winter Camping : A Combination of Quantitative and Qualitative Approaches." Thesis, Linköpings universitet, Nationellt centrum för utomhuspedagogik (NCU), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-120253.
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A growing body of research indicates that nature connectedness should be an important component of environmental education programs as emerging empirical evidence shows a correlation between connectedness to nature and environmentally responsible behaviour. Despite an increased interest in further examination of the human-nature relationship, research is lacking in terms of specific factors or conditions that influence nature connectedness. In this study, a mixed methods approach was employed to quantitatively assess the impact winter camping had on nature connectedness and then qualitatively determine specific components of the camp experience that influenced this sense of nature connectedness. Nineteen scouts participated on a three day winter camp at Manning Park in British Columba, Canada, where they experienced many challenges such as sleeping in quinzees (snow caves) and learned new skills such as snowshoeing. The Nature Relatedness Scale was used to assess nature connectedness in this study. A pre-test was administered a few days before the winter camp and the post-test two days afterwards. The results from the paired sample T-test show that there was a statistically significant improvement in nature connectedness following the winter camp experience. Eleven scouts were then selected to participate in semi-structured interviews with the aim of gaining insight to the specific conditions of winter camping that influenced nature connectedness. The results indicate that the location of the camp, the condition of being immersed in nature, interacting with wildlife, the positive experience of challenges, the presence of risk, and freedom from technology are all contributing factors that influenced a sense o f nature connectedness. An increased environmental awareness was also a prevalent theme which supports research suggesting that there is a positive relationship between nature connectedness and pro-environmental behaviour. It is recommended that programs with the aim of promoting nature connectedness or environmental awareness should include as many of these components as possible. Further research should alsobe conducted to confirm that these results apply also to other populations as these results cannot be generalized with a sample size of nineteen.
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Rollings, Graham. "Using evolutionary algorithms to resolve 3-dimensional geometries encoded in indeterminate data-sets." Thesis, University of Exeter, 2011. http://hdl.handle.net/10036/4326.
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This thesis concerns the development of optimisation algorithms to determine the relative co-location, (localisation), of a number of freely-flying 'Smart Dust mote' sensor platform elements using a non-deterministic data-set derived from the duplex wireless transmissions between elements. Smart dust motes are miniaturised, microprocessor based, electronic sensor platforms, frequently used for a wide range of remote environmental monitoring applications; including specific climate synoptic observation research and more general meteorology. For the application proposed in this thesis a cluster of the notional smart dust motes are configured to imitate discrete 'Radio Drop Sonde' elements of the wireless enabled monitoring system in use by meteorological research organisations worldwide. This cluster is modelled in software in order to establish the relative positions during the 'flight' ; the normal mode of deployment for the Drop Sonde is by ejection from an aeroplane into an upper-air zone of interest, such as a storm cloud. Therefore the underlying research question is, how to track a number of these independent, duplex wireless linked, free-flying monitoring devices in 3-dimensions and time (to give the monitored data complete spatio-temporal validity). This represents a significant practical challenge, the solution applied in this thesis was to generate 3-dimensional geometries using the only 'real-time' data available; the Radio Signal Strength Indicator (RSSI) data is generated through the 'normal' duplex wireless communications between motes. Individual RSSI values can be considered as a 'representation of the distance magnitude' between wireless devices; when collated into a spatio-temporal data-set it 'encodes' the relative, co-locational, 3-dimensional geometry of all devices in the cluster. The reconstruction, (or decoding), of the 3-dimensional geometries encoded in the spatio-temporal data-set is a complex problem that is addressed through the application of various algorithms. These include, Random Search, and optimisation algorithms, such as the Stochastic Hill-climber, and various forms of Evolutionary Algorithm. It was found that the performance of the geometric reconstruction could be improved through identification of salient aspects of the modelled environment, the result was heuristic operators. In general these led to a decrease in the time taken to reach a convergent solution or a reduction in the number of candidate search space solutions that must be considered. The software model written for this thesis has been implemented to generalise the fundamental characteristics of an optimisation algorithm and to incorporate them into a generic software framework; this then provides the common code to all model algorithms used.
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Mantoro, Teddy, and teddy mantoro@anu edu au. "Distributed Support for Intelligent Environments." The Australian National University. Faculty of Engineering and Information Technology, 2006. http://thesis.anu.edu.au./public/adt-ANU20070123.150814.
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This thesis describes research on methods for Ubiquitous/Pervasive Computing to better
suit users in an Intelligent Environment. The approach is to create and equip a computing
environment, such as our Active Office, with technologies that can identify user needs
and meet these need in a timely, efficient and unobtrusive manner.¶
The critical issues in the Intelligent Environment are how to enable transparent,
distributed computing to allow continued operation across changing circumstances and
how to exploit the changing environment so that it is aware of the context of user
location, the collection of nearby people and objects, accessible devices and changes to
those objects over time.¶
Since the Intelligent Environment is an environment with rapid and rich computing
processing, the distributed context processing architecture (DiCPA) was developed to
manage and respond to rapidly changing aggregation of sensor data. This architecture is a
scalable distributed context processing architecture that provides: 1. continued operation
across changing circumstances for users, 2. the collection of nearby people and objects, 3.
accessible devices and 4. the changes to those objects over time in the environment. The
DiCPA approach focuses on how the Intelligent Environment provides context
information for user location, user mobility and the user activity model. Users are
assumed mobile within the Intelligent Environment and can rapidly change their access to
relevant information and the availability of communications and computational resources.¶
Context-Aware Computing is a new approach in software engineering for Intelligent
Environment. It is an approach in the design and construction of a context-aware
application that exploits rapid changes in access to relevant information and the
availability of communication and computing resources in the mobile computing
environment. The goal of Context-Aware Computing is to make user interaction with the
computer easier in the smart environment where technology is spread throughout
(pervasive), computers are everywhere at the same time (ubiquitous) and technology is
embedded (ambient) in the environment. Context-aware applications need not be
difficult, tedious or require the acquisition of new skills on the part of the user. They
should be safe, easy, simple to use and should enable new functionality without the need
to learn new technology. They should provide relevant information and a simple way for
a user to manage.¶
The Intelligent Environment requires a context-aware application to improve its
efficiency and to increase productivity and enjoyment for the user. The context awareness
mechanism has four fundamental cores i.e. identity (who), activity (what), location
(where) and timestamp (when). Based on DiCPA architecture, the model of user location
(where), user mobility (where), user activity (what) and Intelligent Environment response
(what) were developed. Prototypes were also developed to proof the Context-Aware
Computing concept in the Intelligent Environment.¶
An Intelligent Environment uses the multi-disciplinary area of Context-Aware
Computing, which combines technology, computer systems, models and reasoning, social
aspects, and user support. A good quality project for Context-Aware Computing
requires core content and provides iterative evaluation processes, which has two types of
iteration: design and product iteration of the evaluation. The aim of the development of
an evaluation program in Context-Aware Computing is to determine what to test, how to
test and the appropriate metrics to use. This work presents the metrics for a good quality
project in the Context-Aware Computing area, which is followed by the evaluation of the
prototypes of this work.
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Christiansson, Fredrik. "A distributed, mobile positioning systemfor wireless, handheld devices." Thesis, KTH, Teleinformatik, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-93545.
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This thesis investigates the possibilities of implementing a location awareness mechanism for the so-called lesswire localNavigator. The author claims that it is possible to implement such a mechanism within the given prerequisites and constraints, even though with today’s technology it may not be economically feasible. Due to the lesswire’s constraints: high accuracy (67%), high-resolution (12 m2) and no hardware modification allowed to the mobile device, the suggested scheme uses Time Difference Of Arrival technology (TDOA). The main advantage of TDOA, as stated in this thesis, is the fact that it is almost totally independent of the preferred wireless technology of the mobile device. TDOA technology therefore, can be applied to a wide range of wireless networks (primarily TDMA, CDMA, FDMA – based). A disadvantage of this scheme is the fact that the network infrastructure needs to be extremely well synchronized - which in turn implies higher costs. Depending on how the synchronization problem is solved, the proposed system may well be economically feasible in the near future.
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Girardin, Fabien. "Aspects of implicit and explicit human interactions with ubiquitous geographic information." Doctoral thesis, Universitat Pompeu Fabra, 2009. http://hdl.handle.net/10803/7561.
Full textAbstract:
El uso creciente de dispositivos móviles, infraestructuras inalámbricas e Internet está cambiando nuestra vida diaria, no solo la manera en que nos comunicamos o compartimos información, sino también cómo nos relacionamos con el entorno. A través de nuestras interacciones con estas tecnologías, accedemos y generamos una membrana de información que se cierne sobre los espacios donde vivimos y que visitamos. Sin embargo, esta capa de información solo modela de manera imperfecta la realidad debido a una digitalización tosca y a limitaciones tecnológicas, que hacen peligrar la interacción humana. Por otro lado, la presencia de esta información geográfica ubicua generada por los usuarios abre nuevas perspectivas para la comprensión de las actividades humanas en el espacio y el tiempo. Esta tesis acepta el reto de investigar estos aspectos de las interacciones humanas con la información geográfica ubicua. Con un enfoque cualitativo y cuantitativo, discernimos las implicaciones de la integración de información geográfica ubicua y las resultantes estrategias de los usuarios para hacer frente a la incertidumbre espacial. Entonces, explotamos esta contribución para analizar enfoques novedosos con el objetivo de inferir actividades espacio-temporales de individuos y grupos respetando su privacidad. Demostramos la aplicabilidad de nuestras soluciones en los ámbitos de la investigación de mercados y el urbanismo.The increasing use of mobile devices, wireless infrastructures, and the Internet is changing our daily lives, not only in the way we communicate with each other or share information but also how we relate to the environment. Through our interactions with these technologies we access and generate an informational membrane, hovering over the spaces we live in and visit. However, this information layer only imperfectly models the reality due to coarse digitization and technological limitations, challenging the human interaction. On the other hand, the presence of this user-generated ubiquitous geographic information opens novel perspectives in understanding human activities over space and time. This thesis takes on the challenge of exploring these aspects of human interactions with ubiquitous geographic information. Through qualitative lenses, we discern the implications of the integration of ubiquitous geographic information and the resulting users strategies to cope with spatial uncertainty. Then, we exploit this contribution to explore novel approaches to infer individuals and groups time-space activities with respect to their privacy. We demonstrate the applicability of our solutions in the domains of market research and urbanism.
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Ylianttila, M. (Mika). "Vertical handoff and mobility — system architecture and transition analysis." Doctoral thesis, University of Oulu, 2005. http://urn.fi/urn:isbn:9514276922.
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Abstract
The contemporary information age is equipped with rich and affordable telecommunication services. In the future, people have even more flexibility when true wireless Internet and real-time multimedia are provided seamlessly over heterogeneous wireless networks. Optimally combining the capacity and services of the current and emerging networks requires a holistic view of mobility, resource and service management. This thesis contributes to the research and development of these hybrid systems with three main contributions.
Firstly, a system architecture for vertical handoff in location-aware heterogeneous wireless networks is proposed. The proposed architecture enables the mobile node to prepare for approaching vertical handoffs and wake-up a hotspot interface. The needed communication procedures are discussed, and inter-related issues of mobility and geolocation information are considered in proportion to usability, advantages and limitations.
Secondly, a framework for the analysis of vertical handoff algorithm sensitivity to various mobility parameters including velocity, handoff delay and dwell time is introduced. Handoff smoothing with a dwell-timer is analyzed as one potential scheme for optimizing vertical handoff locally. It is compared to a power based algorithm to find out its sensitivity to the changes in effective data rates, velocity of the terminal and the amount of handoff delay. The analysis focuses on the transition region, having case studies on both moving-in and moving-out scenarios. An optimal value for dwell-timer is found through simulations, showing a performance gain over power based algorithm as a function of mean throughput. The analysis is extended also to a multiple network scenario.
Thirdly, experimental results on the behaviour of protocols used in wireless IP networks are presented. Prototype systems demonstrate results of using Mobile IP with a fuzzy logic algorithm for vertical handoff in a heterogeneous network environment and the role of IPv6 when using a voice application in a wireless LAN environment. Latest contributions include developing plug-and-play middleware functionalities for Symbian mobile devices, extending the use of the earlier results to state-of-the-art mobile devices.
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Araujo, Santos Ana Luisa de. "uCom : spatial displays for visual awareness of remote locations." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/55199.
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Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2009.Cataloged from PDF version of thesis.
Includes bibliographical references (p. [113]-116).
uCom enables remote users to be visually aware of each other using "spatial displays" - live views of a remote space assembled according to an estimate of the remote space's layout. The main elements of the system design are a 3D representation of each space and a multi-display physical setup. The 3D image-based representation of a space is composed of an aggregate of live video feeds acquired from multiple viewpoints and rendered in a graphical visualization resembling a 3D collage. Its navigation controls allow users to transition among the remote views, while maintaining a sense of how the images relate in 3D space. Additionally, the system uses a configurable set of displays to portray always-on visual connections with a remote site integrated into the local physical environment. The evaluation investigates to what extent the system improves users' understanding of the layout of a remote space.
by Ana Luisa de Araujo Santos.
S.M.
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Thomas, Robin Rajan. "Optimisation of adaptive localisation techniques for cognitive radio." Diss., University of Pretoria, 2012. http://hdl.handle.net/2263/27076.
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Spectrum, environment and location awareness are key characteristics of cognitive radio (CR). Knowledge of a user’s location as well as the surrounding environment type may enhance various CR tasks, such as spectrum sensing, dynamic channel allocation and interference management. This dissertation deals with the optimisation of adaptive localisation techniques for CR. The first part entails the development and evaluation of an efficient bandwidth determination (BD) model, which is a key component of the cognitive positioning system. This bandwidth efficiency is achieved using the Cramer-Rao lower bound derivations for a single-input-multiple-output (SIMO) antenna scheme. The performances of the single-input-single-output (SISO) and SIMO BD models are compared using three different generalised environmental models, viz. rural, urban and suburban areas. In the case of all three scenarios, the results reveal a marked improvement in the bandwidth efficiency for a SIMO antenna positioning scheme, especially for the 1×3 urban case, where a 62% root mean square error (RMSE) improvement over the SISO system is observed. The second part of the dissertation involves the presentation of a multiband time-of arrival (TOA) positioning technique for CR. The RMSE positional accuracy is evaluated using a fixed and dynamic bandwidth availability model. In the case of the fixed bandwidth availability model, the multiband TOA positioning model is initially evaluated using the two-step maximum-likelihood (TSML) location estimation algorithm for a scenario where line-of-sight represents the dominant signal path. Thereafter, a more realistic dynamic bandwidth availability model has been proposed, which is based on data obtained from an ultra-high frequency spectrum occupancy measurement campaign. The RMSE performance is then verified using the non-linear least squares, linear least squares and TSML location estimation techniques, using five different bandwidths. The proposed multiband positioning model performs well in poor signal-to-noise ratio conditions (-10 dB to 0 dB) when compared to a single band TOA system. These results indicate the advantage of opportunistic TOA location estimation in a CR environment.Dissertation (MEng)--University of Pretoria, 2012.
Electrical, Electronic and Computer Engineering
unrestricted
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Bassam, Abdulhamid Ansam, and Gill Namra Jamshaid. "A proof-of-concept of the audio tour guide application, SoundTracker, aimed at friends and family." Thesis, Malmö universitet, Fakulteten för teknik och samhälle (TS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20890.
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Kontextmedvetenhet kan användas i turistguide applikationer för att bidra användare med information och tjänster. Majoriteten av turistguide applikationer utvecklas vanligtvis för utbildnings eller historiska ändamål. Den här studien presenterar en konceptvalidering av den opublicerade ljuvandrings applikationen "SoundTracker", i syfte att förbättra den. Den nya "SoundTracker" prototypen inriktar sig inte på utbildnings eller historiska ändamål, utan den är inriktad på inspelning, uppspelning, och delning av personliga ljudvandringar med vänner och familj. Konceptvalideringen är begränsad av de definierade forskningsfrågorna i den här uppsatsen. Det handlar i korta drag om en förbättring av noggranheten på de inlästa GPS koordinaterna från en användares position, för att förse användaren med en trevlig användarupplevelse. Dessutom är grafiska användargränssnittet av den originala prototypen förbättrat, och testat genom webb enkäter. Vad gäller delnings funktionaliteten, en test applikation är skapad för att hitta essentiella aspekter som behöver tas hänsyn till i den nya "SoundTracker" prototypen när en användare vill dela ett ljudspår med vänner och familj. Test applikationen testas baserat på samlade svar genom en semi strukturerad interview på människor i åldersgruppen 20-30 år.De erhållna resultaten indikerar på att genom användning av Kalman filter, förbättras noggrannheten på användarens position, vilket resulterar i en ljudvandring med mindre avvikelser jämfört med en GPS-sensor. Vad gäller det förbättrade grafiska användargränssnittet, det var enklare för användarna att förstå den förbättrade prototypen såväl som navigera igenom den, än fallet med den originala prototypen. Användarna finner det även intressant när en delningsfunktion implementeras med designen som diskuteras i det här arbetet.Context-awareness can be used in tour guide applications in order to provide users with information and services. The majority of tour guide applications are usually developed for educational or historical review purposes. This paper presents a proof-of-concept of the unpublished audio tour guide application, “SoundTracker”, with the aim of improving it. The new “SoundTracker” prototype does not aim for educational or historical review purposes, instead it is aimed for recording, listening and sharing personal audio tour guides with friends and family. The proof-of-concept is limited by the defined research questions found in this paper. In summary, the accuracy of the read-in GPS coordinates of a user’s position is enhanced with Kalman filter, to give an enjoyable user experience. Additionally, the graphical user interface of the original prototype is improved and tested through web-surveys. As for the sharing functionality, a test application is created in order to find what necessary aspects need to be considered in the new "SoundTracker" prototype when a user wants to share a sound-walk with friends and family. The test application is tested based on responses obtained through a semi-structured interview from people in the age of 20-30 years.The obtained results indicate that, with use of Kalman filter, the location accuracy of the user is enhanced, which results in a sound-walk with less deviations compared to location accuracy of only GPS-sensor. Regarding the improved graphical user interface, users found the new "SoundTracker" prototype easier to understand, as well as to navigate through it, than the case in the original prototype. Users also find it interesting when a sharing function is implemented with the design that is discussed in this work.
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Lôbo, Jaziel Souza. "CONTEXTO DE EXPERTISE E LOCALIZAÇÃO INFLUENCIANDO A GERÊNCIA DE TI." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/5379.
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The modern organizations are becoming increasingly dependent on Information Technology (IT), which requires implementation of an effective management support on this area where the high investments achieved can add value for the companies. The intent of reducing the damage caused by unusual computer problems is to provide an active and complete technical assistance to the users. This support team, which is responsible for IT maintenance, was initially named help desk and later, it was modified to service desk due to its significance and the integrated services that were added in this work area. The high diversity of hardware and software besides the current user s demand, which increase the complexity of the technical assistance, creates a new request: the human resource allocation that provides an appropriate profile for solving different types of computers problems. Professionals, who don t have the proper expertise (work experience and practice) for specific maintenance, can bring unnecessary travel for the technician and work inactivity for the requester.This paper aims the adjustment of a service desk tool developed at the Federal University of Santa Maria. The remodelling involves a context-aware computing, location awareness and temporal context characteristics and the technician expertise. The main results demonstrate a service desk context-aware system (sdvpc-SC), that also enables its access through a mobile device and the improvement of technical calls distributed by expertise and geographical location. The tests proved that the system is technically possible and its adjustments can be easily implemented in different types systems of the same category.As organizações modernas estão se tornando cada vez mais dependentes da Tecnologia da Informação (TI), o que torna imprescindível a implementação de um gerenciamento efetivo da TI para que os altos investimentos realizados no setor possam agregar valor às empresas. Quando surge um problema em algum equipamento de informática, ocasionando um funcionamento anormal dos serviços, espera-se que o usuário tenha uma resposta rápida e clara da equipe de suporte para minimizar os prejuízos causados. Esta equipe de suporte, responsável por resolver os problemas de TI, foi inicialmente denominada help desk, mas devido a sua importância e a novos serviços agregados a sua área de atuação passou a ser chamada de service desk. A grande diversidade de hardware e software aliada as atuais exigências dos usuários torna o atendimento mais complexo e cria uma nova demanda: a alocação de recursos humanos que apresentem o perfil adequado para resolução dos diferentes tipos de problemas. Alocar técnicos que não possuem a expertise (experiência e prática) correta para a solução do problema pode ocasionar, para o técnico, a perda de tempo pelo deslocamento desnecessário, e para o usuário a ociosidade devido à falta de solução do incidente no primeiro atendimento. Este trabalho apresenta a adaptação de uma ferramenta de service desk desenvolvida na Universidade Federal de Santa Maria. As adequações envolvem características da computação sensível ao contexto de localização, temporal e de expertise do técnico. Como principais resultados, obteve-se um sistema de service desk sensível ao contexto (sdvpc-SC), que possibilita o seu acesso através de dispositivo móvel, com a otimização das chamadas por expertise e a localização geográfica do técnico. Os testes demonstraram que o sistema é tecnicamente viável e as adaptações realizadas neste trabalho podem ser facilmente implementadas em diferentes tipos de sistemas da mesma categoria.
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MARTIRE, FRANCESCA. "Context-aware services for mobile devices." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2008. http://hdl.handle.net/2108/518.
Full textAbstract:
La Context-awareness, è un insieme di features tecniche che permette di offrire una vasta gamma di servizi dove le informazioni “seguono” gli utenti. Tali servizi promettono di fornire le informazioni di cui l’utente necessita nel momento giusto, al posto giusto e nel modo più semplice, veloce e opportuno. La prima parte della mia attività di ricerca si è focalizzata su un sottoinsieme di aspetti associati alla Context Awareness. Il lavoro si colloca in un progetto di ricerca finanziato dalla Comunità Europea: il progetto SIMPLICITY. Simplicity propone una generalizzazione del concetto di “portabilità”, permettendo agli utenti di muoversi senza vincoli tra differenti applicazioni distribuite e diversi servizi, utilizzando tecnologie di rete ed apparecchiature eterogenee. A partire da questi obiettivi la mia ricerca si è concentrata proprio sul Profilo d’utente prendendo come punto di partenza il Generic User Profile proposto dal 3GPP(GUP). Il mio lavoro si è focalizzato su un ripensamento dell’ architettura proposta dal 3GPP e la struttura che alla fine ne deriva ricopre ed estende tale modello. La ricerca si è successivamente spostata sul contenuto del profilo utente e quindi sui dati che tale profilo doveva contenere. Nella tesi è presentato anche il concetto di Simplicity Device(SD), un dispositivo portatile, che permette agli utenti di “portare” da un terminale ad un altro la propria identità digitale, i propri dati personali e le proprie preferenze. L’utilizzo congiunto di un profilo d'utente personale e di un dispositivo hardware (SD), permette di ottenere una configurazione automatica, trasparente, e personalizzata, di terminali, dispositivi, e servizi.
Nei sistemi in cui “le informazioni devono seguire gli utenti”, ecco che ci si trova a parlare di localizzazione, ossia di individuazione della posizione dell’utente in movimento. In tale prospettiva, nella seconda parte di questa tesi, il problema della localizzazione e i cosiddetti “Location Based Services” (LBS) hanno rivestito notevole interesse. Anche in questo caso l’attività si inquadra in un altro progetto di ricerca Europeo: il progetto SMS (Simple Mobile Services). In particolare i servizi SMS promettono di fornire all’utente mobile non servizi e informazioni generiche ma contestualizzate e quindi basate, tra l’altro, sulla posizione e area geografica in cui si trova nel momento in cui richiede le informazioni e i servizi stessi. Nella tesi è descritto lo studio ed implementazione di un’architettura di supporto per servizi Location Based nuovi o già esistenti. Essa è strutturata su più livelli e le interfacce realizzate consentono l’accesso semplice alle funzionalità dei livelli sottostanti. In particolare esse sono state progettate come strumenti che sollevino gli sviluppatori dai problemi relativi all’acquisizione del dato di posizione e che allo stesso tempo nascondano i dettagli delle tecniche che permettono la localizzazione stessa. Il sistema è slegato dalla particolare tecnologia di localizzazione utilizzata e ingloba in sé più tecnologie di localizzazione essendo in grado di scegliere quale utilizzare a seconda del contesto. Parallelamente l’architettura è stata pensata in modo tale da poter essere utilizzata anche in situazioni in cui non è possibile determinare la posizione corrente di un utente. L’architettura e le location API implementate, costituiscono un sistema per lo sviluppo di applicazioni Location Based per scenari sia Indoor che Outdoor. La soluzione proposta è altresì in grado di gestire in modo trasparente e senza interrompere la continuità del servizio la transizione tra spazi Indoor e Outdoor. Nella tesi sono descritti e analizzati i dettagli implementativi di ogni livello dell’architettura. Sono stati realizzati due moduli software che forniscono servizi di navigazione e localizzazione sia in spazi aperti che chiusi. I due Navigatori realizzati offrono le stesse interfacce grazie a un contenitore generico dell’informazione di posizione che entrambe utilizzano. I dettagli della definizione, implementazione e originale utilizzo di tale fondamentale oggetto, chiamato “Position object” sono altresì oggetto di questa trattazione.“Context-awareness lets computing technology to provide services to people at any time, any where, with any media but also specifically to communicate the right thing at the right time and in the right way”. Within the research field of context-aware services, researchers from industry and academia have been working on solutions for this problem for the last decade. In the first part of my research work I focused on a subset of the research field of context aware-services. The work has been performed in the context of the SIMPLICITY project. The personalization concept is based on a user profile which realizes a common underlying information model for all the elements of the Simplicity architecture. In this perspective the first part of this dissertation focuses on my specification and development of the Simplicity User Profile (SUP) to provide highly personalized context-aware services with reduced interactional complexity for the end-user. I started from the work carried out in 3GPP on the GUP but I extended and improved that approach. In this dissertation I also present the concept of the Simplicity Device (SD) which is an enhanced mobile phone that stores and handles personal information, user preferences and policies. The SD, by the simple act of “plugging” it into a terminal, becomes the “virtual” identity of the end-user. It allows the enforcement of user-personalized mechanisms to exploit service fruition, to drive automatic adaptation to terminal capabilities, and to facilitate service adaptation to various network technologies and related capabilities. The SUP, the SD together with a brokerage framework simplify the process of using current and future “services” providing a user-friendly solution. To best meet the mobile user’s current and continuously changing context, location-aware capabilities represent an important issues to be addressed. Hence the second part of this thesis consider Location-Awareness and Location Based Service(LBS). The work was performed in the framework of an another IST Project, named Simple Mobile Services (SMS). SMS services will target specific locations visited by specific classes of mobile user with specific needs. In this perspective my research activity was devoted to define, project and implement a Localization and Navigation architecture that, in many ways, enable the simple creation and development of new context-sensitive services or supply existing applications with location awareness. The driving idea was to develop simple to use interfaces leveraging the developers and the users the complexities related to the acquisition of a position information as well as hiding the particulars of the positioning technologies employed. Moreover the overall architecture is conceived to support situations in which determining the exact position of a mobile terminal is not a strict requirement, but it is enough to identify the terminal position within a radius or inside an area (e.g., rooms indoor, or zones outdoor). The software architecture also makes a combined use of indoor and outdoor location-sensing technologies being able to solve localization problems independently from the environment and the location technology in use. It also realizes a transparent and automatic switch mechanism from indoor to outdoor (and vice versa) situations without breaking the continuity of the service usage. To prove the feasibility of the entire architecture a prototypical implementation has been developed using J2ME CLDC on Java enabled phones. Both the indoor and outdoor implemented navigation applications provide the same interfaces, thanks to the general purpose definition of the same position information container used for both of them. The definition and implementation process of this object, named Position object, is here presented.
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Hobart, Leigh. "The current context of Queensland primary teacher engagement with professional learning through professional associations." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/46122/1/Leigh_Hobart_Thesis.pdf.
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Engaging Queensland primary teachers in professional associations can be a challenge, particularly for subject-specific associations. Professional associations are recognised providers of professional learning. By not being involved in professional associations primary teachers are missing potential quality professional learning opportunities that can impact the results of their students. The purpose of the research is twofold: Firstly, to provide a thorough understanding of the current context in order to assist professional associations who wish to change from their current level of primary teacher engagement; and secondly, to contribute to the literature in the area of professional learning for primary teachers within professional associations. Using a three part research design, interviews of primary teachers and focus groups of professional association participants and executives were conducted and themed to examine the current context of engagement. Force field analysis was used to provide the framework to identify the driving and restraining forces for primary teacher engagement in professional learning through professional associations. Communities of practice and professional learning communities were specifically examined as potential models for professional associations to consider. The outcome is a diagrammatic framework outlining the current context of primary teacher engagement, specifically the driving and restraining forces of primary teacher engagement with professional associations. This research also identifies considerations for professional associations wishing to change their level of primary teacher engagement. The results of this research show that there are key themes that provide maximum impact if wishing to increase engagement of primary teachers in professional associations. However the implications of this lies with professional associations and their alignment between intent and practice dedicated to this change.
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Pearn, B. "Location Awareness in Wireless Networks." Thesis, 2004. https://eprints.utas.edu.au/165/1/Thesis.PDF.
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With the proliferation of wireless networks and the declining cost of wireless devices there is increasing interest in the development of location aware applications. These applications include robotics, context aware systems to collect or disseminate information, duress alarms in institutions such as hospitals and prisons and security of the wireless network.
There are many technologies that may be used to sense the location of mobile devices or personnel, including those based on infrared, ultrasonic, radio frequency tags and magnetic sensing. Most of these technologies require the deployment of devices specifically placed to support the location system. This paper focuses on a location system based on the RSSI of packets on the IEEE 802.11b wireless network. This technique has the great advantage that it may be implemented using off the shelf hardware that is generally already deployed to support the data network.
A simple wireless network was deployed in the School of Computing Building at the Newnham Campus of the University of Tasmania and used to test the location performance of a location system based on Bayesian filtering of detected signal strengths.
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"Location awareness in cognitive radio networks." UNIVERSITY OF SOUTH FLORIDA, 2009. http://pqdtopen.proquest.com/#viewpdf?dispub=3347302.
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Chen, Wei-Sheng, and 陳威勝. "Location-Awareness Wearable Mobile Advertisement System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/38775290290649459697.
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碩士國立中央大學
資訊工程學系碩士在職專班
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No mater the location of the mobile adver-tisement, it broadcasts the same advertisement. The advertisement content cannot be changed after the advertisement agent setting. The re-quest broadcasts owner does not have the con-trol power completely to the advertisement installment. All operations need the adver-tisement agent assistance. This research will integrate the wearable electronic equipments, the wireless localization installments, wireless communication installments, e-Paper and so on, to propose a new mobile advertisement construction. The new mobile advertising in-stallment can embedded itself in clothing or the packsack and have the location-awareness function. The new system provides the request broadcasts owner to observe the position of a mobile advertisement installment and to change the advertisement content directly.