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Indoor positioning systems (Wireless localization) --- Electronics in navigation --- Electronics in navigation.

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This book focuses on ubiquitous indoor localization services, specifically addressing the issue of floor plans. It combines computer vision algorithms and mobile techniques to reconstruct complete and accurate floor plans to provide better location-based services for both humans and vehicles via commodity smartphones in indoor environments (e.g., a multi-layer shopping mall with underground parking structures). After a comprehensive review of scene reconstruction methods, it offers accurate geometric information for each landmark from images and acoustics, and derives the spatial relationships of the landmarks and rough sketches of accessible areas with inertial and WiFi data to reduce computing overheads. It then presents the authors’ recent findings in detail, including the optimization and probabilistic formulations for more solid foundations and better robustness to combat errors, several new approaches to promote the current sporadic availability of indoor location-based services, and a holistic solution for floor plan reconstruction, indoor localization, tracking, and navigation. The novel approaches presented are designed for different types of indoor environments (e.g., shopping malls, office buildings and labs) and different users. A valuable resource for researchers and those in start-ups working in the field, it also provides supplementary material for students with mobile computing and networking backgrounds.

Indoor positioning systems (Wireless localization) --- Computer science. --- Special purpose computers. --- Computer Science. --- Mobile Computing. --- Information Systems Applications (incl. Internet). --- Special Purpose and Application-Based Systems. --- Indoor localization technologies (Wireless localization) --- Indoor positioning systems (Wireless communication systems) --- Positioning systems, Indoor (Wireless localization) --- Mobile geographic information systems --- Wireless localization --- Mobile computing. --- Software engineering. --- Computer software engineering --- Engineering --- Electronic data processing --- Context-aware computing --- Portable computers --- Application software. --- Special purpose computers --- Computers --- Application computer programs --- Application computer software --- Applications software --- Apps (Computer software) --- Computer software --- Computers, Special purpose.

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This SpringerBrief examines the use of cheap commercial passive RFID tags to achieve accurate device-free object-tracking. It presents a sensitive detector, named Twins, which uses a pair of adjacent passive tags to detect uncooperative targets (such as intruders). Twins leverages a newly observed phenomenon called critical state that is caused by interference among passive tags. The author expands on the previous object tracking methods, which are mostly device-based, and reveals a new interference model and their extensive experiments for validation. A prototype implementation of the Twins-based intrusion detection scheme with commercial off-the-shelf reader and tags is also covered in this SpringerBrief. Device-Free Object Tracking Using Passive Tags is designed for researchers and professionals interested in smart sensing, localization, RFID and Internet of Things applications. The content is also useful for advanced-level students studying electrical engineering and computer science.

Radio frequency identification systems. --- Indoor positioning systems (Wireless localization) --- Motion detectors. --- Automatic tracking. --- Tracking, Automatic --- Servomechanisms --- Tracking (Engineering) --- Motion sensors --- Detectors --- Indoor localization technologies (Wireless localization) --- Indoor positioning systems (Wireless communication systems) --- Positioning systems, Indoor (Wireless localization) --- Mobile geographic information systems --- Wireless localization --- Identification systems, Radio frequency --- RF/ID systems --- RFID systems --- Identification --- Radio telemetry --- Near-field communication --- Equipment and supplies --- Computer Communication Networks. --- Telecommunication. --- Communications Engineering, Networks. --- Information Systems Applications (incl. Internet). --- Electric communication --- Mass communication --- Telecom --- Telecommunication industry --- Telecommunications --- Communication --- Information theory --- Telecommuting --- Computer communication systems. --- Electrical engineering. --- Application software. --- Electric engineering --- Engineering --- Communication systems, Computer --- Computer communication systems --- Data networks, Computer --- ECNs (Electronic communication networks) --- Electronic communication networks --- Networks, Computer --- Teleprocessing networks --- Data transmission systems --- Digital communications --- Electronic systems --- Information networks --- Telecommunication --- Cyberinfrastructure --- Electronic data processing --- Network computers --- Application computer programs --- Application computer software --- Applications software --- Apps (Computer software) --- Computer software --- Distributed processing

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This book constitutes the refereed proceedings of the international competition aimed at the evaluation and assessment of Ambient Assisted Living (AAL) systems and services, EvAAL 2011, which was organized in two major events, the Competition in Valencia, Spain, in July 2011, and the Final workshop in Lecce, Italy, in September 2011. The papers included in this book describe the organization and technical aspects of the competition, and provide a complete technical description of the competing artefacts and report on the experience lessons learned by the teams during the competition.

Ambient intelligence --- Older people --- Indoor positioning systems (Wireless localization) --- Engineering & Applied Sciences --- Computer Science --- Dwellings --- Location-based services --- Context-aware computing --- Benchmarking (Management) --- Computerized self-help devices for people with disabilities --- Evaluation --- Computerized self-help devices for the handicapped --- Benchmarks (Management) --- Context-aware pervasive systems --- Context-awareness (Computer science) --- AmI (Ambient intelligence) --- Intelligence, Ambient --- LBS (Information services) --- Location-based computing --- Mobile location services --- Telegeoinformatics --- Computer science. --- Computer software --- Special purpose computers. --- Computer system failures. --- Application software. --- Computers and civilization. --- Computer Science. --- System Performance and Evaluation. --- Special Purpose and Application-Based Systems. --- Performance and Reliability. --- Computers and Society. --- Information Systems Applications (incl. Internet). --- Computer Applications. --- Reusability. --- Self-help devices for people with disabilities --- Total quality management --- Ubiquitous computing --- Global system for mobile communications --- Mobile computing --- Sensor networks --- Human-computer interaction --- Information services --- Wireless localization --- Voice computing --- Computer system performance. --- Software engineering. --- Operating systems (Computers). --- Informatics --- Science --- Computer operating systems --- Computers --- Disk operating systems --- Systems software --- Computer software engineering --- Engineering --- Operating systems --- Computer software—Reusability. --- Application computer programs --- Application computer software --- Applications software --- Apps (Computer software) --- Civilization and computers --- Civilization --- Special purpose computers --- Computer failures --- Computer malfunctions --- Computer systems --- Failure of computer systems --- System failures (Engineering) --- Fault-tolerant computing --- Failures