Cellphone geolocation via magnetic mapping

Cui, Yue; An, R; Ariyur, Kartik B.

doi:10.1016/j.automatica.2014.10.118

Cited by 5 publications

(3 citation statements)

References 29 publications

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“…Therefore, a supplementary approach must be adopted to achieve a robust and precise indoor positioning and tracking system. For example, the authors of [28,44,45,47,129,130,131,132,133,134,135] combined PDR with other approaches to improve localization accuracy (e.g., GPS, ultrasound ranging, active RFID, WiFi signatures, and Chirp Spread Spectrum (CSS) radio beacons). The accuracy of these approaches can be greatly improved compared with stand-alone PDR systems, with errors reaching below 1.7 m. Hence, in this review, a scheme fusing a PDR system with a magnetic indoor positioning technique is recommended.…”

Section: Discussionmentioning

confidence: 99%

A Review of Wearable Technologies for Elderly Care that Can Accurately Track Indoor Position, Recognize Physical Activities and Monitor Vital Signs in Real Time

Wang

Yang

Dong

2017

Sensors

288

161

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Rapid growth of the aged population has caused an immense increase in the demand for healthcare services. Generally, the elderly are more prone to health problems compared to other age groups. With effective monitoring and alarm systems, the adverse effects of unpredictable events such as sudden illnesses, falls, and so on can be ameliorated to some extent. Recently, advances in wearable and sensor technologies have improved the prospects of these service systems for assisting elderly people. In this article, we review state-of-the-art wearable technologies that can be used for elderly care. These technologies are categorized into three types: indoor positioning, activity recognition and real time vital sign monitoring. Positioning is the process of accurate localization and is particularly important for elderly people so that they can be found in a timely manner. Activity recognition not only helps ensure that sudden events (e.g., falls) will raise alarms but also functions as a feasible way to guide people's activities so that they avoid dangerous behaviors. Since most elderly people suffer from age-related problems, some vital signs that can be monitored comfortably and continuously via existing techniques are also summarized. Finally, we discussed a series of considerations and future trends with regard to the construction of "smart clothing" system.

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Section: Discussionmentioning

confidence: 99%

A Review of Wearable Technologies for Elderly Care that Can Accurately Track Indoor Position, Recognize Physical Activities and Monitor Vital Signs in Real Time

Wang

Yang

Dong

2017

Sensors

288

161

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“…Furthermore, the tetrahedral structure of the diamond crystal lattice allows such devices to directly sense the magnetic field vector [11][12][13], an advantage over the inherently scalar measurements of traditional atomic magnetometers. The combination of these characteristics in a single magnetic sensor is transformational for a wide variety of magnetometry applications, ranging from all-magnetic navigation [14][15][16] to geological surveys [17] to magnetic mapping of archaeological sites [18] to locating unexploded ordinance [19][20][21]. In this Article, we overcome a number of major technical obstacles to make significant progress towards realizing robust, fieldable NV magnetometers, suitable for operation in the practical environments required for many of these potential applications.…”

Section: Introductionmentioning

confidence: 99%

Robust high-dynamic-range vector magnetometry with nitrogen-vacancy centers in diamond

Clevenson

Pham

Teale

et al. 2018

Applied Physics Letters

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We demonstrate a robust, scale-factor-free vector magnetometer, which uses a closed-loop frequency-locking scheme to simultaneously track Zeeman-split resonance pairs of nitrogen-vacancy (NV) centers in diamond. Compared with open-loop methodologies, this technique is robust against fluctuations in temperature, resonance linewidth, and contrast; offers a three-order-of-magnitude increase in dynamic range; and allows for simultaneous interrogation of multiple transition frequencies.By directly detecting the resonance frequencies of NV centers aligned along each of the diamond's four tetrahedral crystallographic axes, we perform full vector reconstruction of an applied magnetic field. * These authors contributed equally to this work. †

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“…Geolocation is a technique of identifying geograph-ical location in the real world that comes from an inter-netconnected object, such as a mobile phone, radar or computer. [18], [19]. In geolocation itself there is the simplest form, where geolocation involves a set of geographical coordinates that are closely related to the use of the system in positioning such as a street address at a location [20].…”

Section: A Geolocationmentioning

confidence: 99%

Shortest Route at Dynamic Location with Node Combination-Dijkstra Algorithm

Fitro¹,

Suryono²,

Kusumaningrum³

2018

EECSI

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Online transportation has become a basic requirement of the general public in support of all activities to go to work, school or vacation to the sights. Public transportation services compete to provide the best service so that consumers feel comfortable using the services offered, so that all activities are noticed, one of them is the search for the shortest route in picking the buyer or delivering to the destination. Node Combination method can minimize memory usage and this methode is more optimal when compared to A* and Ant Colony in the shortest route search like Dijkstra algorithm, but can't store the history node that has been passed. Therefore, using node combination algorithm is very good in searching the shortest distance is not the shortest route. This paper is structured to modify the node combination algorithm to solve the problem of finding the shortest route at the dynamic location obtained from the transport fleet by displaying the nodes that have the shortest distance and will be implemented in the geographic information system in the form of map to facilitate the use of the system.

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Cellphone geolocation via magnetic mapping

Cited by 5 publications

References 29 publications

A Review of Wearable Technologies for Elderly Care that Can Accurately Track Indoor Position, Recognize Physical Activities and Monitor Vital Signs in Real Time

A Review of Wearable Technologies for Elderly Care that Can Accurately Track Indoor Position, Recognize Physical Activities and Monitor Vital Signs in Real Time

Robust high-dynamic-range vector magnetometry with nitrogen-vacancy centers in diamond

Shortest Route at Dynamic Location with Node Combination-Dijkstra Algorithm

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