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Radio-frequency identification

Radio-frequency identification
Radio-frequency identification (RFID) is the wireless use of electromagnetic fields to transfer data, for the purposes of automatically identifying and tracking tags attached to objects. The tags contain electronically stored information. Some tags are powered by electromagnetic induction from magnetic fields produced near the reader. Some types collect energy from the interrogating radio waves and act as a passive transponder. Since RFID tags can be attached to cash, clothing, and possessions, or implanted in animals and people, the possibility of reading personally-linked information without consent has raised serious privacy concerns.[2] These concerns resulted in standard specifications development addressing privacy and security issues. In 2014, the world RFID market is worth US$8.89 billion, up from US$7.77 billion in 2013 and US$6.96 billion in 2012. History[edit] Design[edit] Tags[edit] RFID tags can be either passive, active or battery-assisted passive. Readers[edit] Uses[edit]

Near-field electromagnetic ranging Near-field electromagnetic ranging (NFER) refers to any radio technology employing the near-field properties of radio waves as a Real Time Location System (RTLS). Overview[edit] Near-field electromagnetic ranging is an emerging RTLS technology that employs transmitter tags and one or more receiving units. Operating within a half-wavelength of a receiver, transmitter tags must use relatively low frequencies (less than 30 MHz) to achieve significant ranging. Depending on the choice of frequency, NFER has the potential for range resolution of 30 cm (1 ft) and ranges up to 300 m (1,000 ft).[1] Technical Discussion[edit] Advantages[edit] NFER technology is a different approach for locating systems. For instance, a radio wave at 1 MHz has a period of 1 µs, and the EH phase difference changes about 45 degrees between 30 m (100 ft) to 60 m (200 ft). Using relatively low frequencies also conveys additional advantages. Disadvantages[edit] Operation at low frequencies faces challenges as well.

Digital worlds can help autistic children to develop social skills The benefits of virtual worlds can be used to help autistic children develop social skills beyond their anticipatedlevels, suggest early findings from new research funded by the Economic and Social Research Council (ESRC). 21 October 2011 The benefits of virtual worlds can be used to help autistic children develop social skills beyond their anticipated levels, suggest early findings from new research funded by the Economic and Social Research Council (ESRC). Researchers on the Echoes Project have developed an interactive environment which uses multi-touch screen technology where virtual characters on the screener act to children’s actions in real time. During sessions in the virtual environment, primary school children experiment with different social scenarios, allowing the researchers to compare their reactions with those they display in real-world situations. "Discussions of the data with teachers suggest a fascinating possibility," said project leader Dr Kaska Porayska-Pomsta.

Définition de la RFID Accueil > La RFID pour tous Insérer une clé pour démarrer un véhicule, badger pour accéder à un bâtiment ou une salle, utiliser les remontées mécaniques lors d’un séjour au ski, valider un titre de transport dans le bus ou le métro sont des gestes entrés dans le quotidien de bon nombre d’entre nous. Nous utilisons, sans en être toujours conscient, des technologies de capture automatique de données basées sur les ondes et rayonnements radiofréquence. Cette technologie est connue sous le nom de RFID pour Identification RadioFréquence. Ce que chaque être humain fait dans sa vie quotidienne, les objets le font également depuis leur lieu de fabrication jusqu’au point de vente en passant par les lieux de stockage. On peut donner la définition suivante à la RFID - Radio Frequency IDentification - : Technologie d'identification automatique qui utilise le rayonnement radiofréquence pour identifier les objets porteurs d'étiquettes lorsqu'ils passent à proximité d'un interrogateur.

Real-time locating system Real-time locating systems (RTLS) are used to automatically identify and track the location of objects or people in real time, usually within a building or other contained area. Wireless RTLS tags are attached to objects or worn by people, and in most RTLS, fixed reference points receive wireless signals from tags to determine their location.[1] Examples of real-time locating systems include tracking automobiles through an assembly line, locating pallets of merchandise in a warehouse, or finding medical equipment in a hospital. The physical layer of RTLS technology is usually some form of radio frequency (RF) communication, but some systems use optical (usually infrared) or acoustic (usually ultrasound) technology instead of or in addition to RF. Tags and fixed reference points can be transmitters, receivers, or both, resulting in numerous possible technology combinations. RTLS are a form of local positioning system, and do not usually refer to GPS, mobile phone tracking. Origin[edit]

Radio-identification Un article de Wikipédia, l'encyclopédie libre. Une puce de radio-identification EPC utilisée par Wal-Mart La radio-identification, le plus souvent désignée par le sigle RFID (de l’anglais radio frequency identification), est une méthode pour mémoriser et récupérer des données à distance en utilisant des marqueurs appelés « radio-étiquettes » (« RFID tag » ou « RFID transponder » en anglais)[1]. Les radio-étiquettes sont de petits objets, tels que des étiquettes autoadhésives, qui peuvent être collés ou incorporés dans des objets ou produits et même implantés dans des organismes vivants (animaux, corps humain[2]). Les radio-étiquettes comprennent une antenne associée à une puce électronique qui leur permet de recevoir et de répondre aux requêtes radio émises depuis l’émetteur-récepteur. Ces puces électroniques contiennent un identifiant et éventuellement des données complémentaires. Cette technologie d’identification peut être utilisée pour identifier : Principe[modifier | modifier le code]

Indoor Autonomous Positioning SCP technology makes it possible to provide reliable, consistent, and accurate indoor positioning without the support of network infrastructure and services. By exploiting freely available signals including GPS, cellular, digital television, and wireless LAN (e.g. WiFi), SCP based Doppler Aided Inertial Navigation (DAIN) determines location through a sensor fusion approach. Combining inertial, magnetic, and gravity data with the SCP RF observables, DAIN provides continuous position, velocity, and direction information. A fundamental breakthrough in indoor positioning, SCP DAIN is ideal for emerging location enabled applications hosted on smart phone devices. DAIN is an ideal enabler for both consumer and commercial applications.

RFID (Radio Frequency IDentification) Décembre 2015 Introduction à RFID L'abréviation RFID signifie « Radio Frequency IDentification », en français, « Identification par Radio Fréquence ». Cette technologie permet d’identifier un objet, d’en suivre le cheminement et d’en connaître les caractéristiques à distance grâce à une étiquette émettant des ondes radio, attachée ou incorporée à l’objet. La technologie RFID permet la lecture des étiquettes même sans ligne de vue directe et peut traverser de fines couches de matériaux (peinture, neige, etc.). L’étiquette radiofréquence (transpondeur, étiquette RFID), est composée d’une puce (en anglais « chip ») reliée à une antenne, encapsulées dans un support (RFID Tag ou RFID Label). On distingue 3 catégories d’étiquettes RFID : Les étiquettes en lecture seule, non modifiables, Les étiquettes « écriture une fois, lecture multiple », Les étiquettes en « lecture réécriture ». Par ailleurs, il existe deux grandes familles d'étiquettes RFID : Exemples d’applications opérationnelles :

Indoor Navigation with SVG SVG, positioning technologies, mobility, guiding system Christian SchmittResearcherFraunhofer FIT Schloss Birlinghoven Sankt-Augustin Germany christian.schmitt@fit.fraunhofer.de Oliver KaufmannFraunhofer FITSchloss Birlinghoven Sankt-Augustin Germany oliver.kaufmann@fit.fraunhofer.de This paper describes a mobile guide providing office building visitors with indoor navigation aid. 1. 1. FIT has a long history in developing mobile guides for museums, fairs, symposiums. Our mobile guide was developed with the aim to be used for demo purposes by visitors to our institute, for demonstrating our expertise in mobile computing, positioning technologies and human-computer interface. Present information about our research department (employees, projects)Let the user experience indoor navigation on our floor Presenting information can be easily achieved by integrating functionalities from the Pocket Internet Explorer in the application and having the content available as HTML pages. 2. 3. 4.

RFID (radio frequency identification): A technology that uses small, inexpensive chips attached to products (or even animals) that then transmit a unique identification number over a short distance to a special radio transmitter/receiver.

Found in: Hurwitz, J., Nugent, A., Halper, F. & Kaufman, M. (2013) Big Data For Dummies. Hoboken, New Jersey, United States of America: For Dummies. ISBN: 9781118504222. by raviii Jan 1

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