Results 1 to 10 of about 18,494 (213)
Opportunistic and Context-Aware Affect Sensing on Smartphones [PDF]
IEEE Pervasive Computing, 2016 Opportunistic affect sensing offers unprecedented potential for capturing spontaneous affect, eliminating biases inherent in the controlled setting. Facial expression and voice are two major affective displays, but most affect sensing systems on smartphones avoid them due to extensive power requirements.
Rajib Rana, Margee Hume, John Reilly
exaly +5 more sources
Translation Resilient Opportunistic WiFi Sensing [PDF]
2020 25th International Conference on Pattern Recognition (ICPR), 2021 Passive wireless sensing using WiFi signals has become a very active area of research over the past few years. Such techniques provide a cost-effective and non-intrusive solution for human activity sensing especially in healthcare applications. One of the main approaches used in wireless sensing is based on fine-grained WiFi Channel State Information ...
Mohammud Junaid Bocus +6 more
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Opportunistic Mobile Sensing in the Fog [PDF]
Wireless Communications and Mobile Computing, 2018 The increasing adoption of mobile personal devices and Internet of Things devices is leveraging the emergence of a wide variety of opportunistic sensing applications. However, the designers of this type of applications face a set of technical challenges related to the limitations and heterogeneity of the hardware and software platforms and to the ...
Rolando Menchaca-Méndez +5 more
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A Bus-based Opportunistic Sensing Network
Anais Estendidos do XXXIX Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos (SBRC Estendido 2021), 2021 Smart city applications need data about the city, and this data must follow specific requirements. Two of these requirements are the maximum delivery delay and the minimum measurement frequency. Using buses to gather data and bus stops as gateways can be cost-effective, but data might not fit the application requirements.
Pedro Henrique Cruz Caminha +2 more
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Opportunistic Spectrum Sensing and Transmissions [PDF]
, 2012 Nowadays, cognitive radio is one of the most promising paradigms in the arena of wireless communications, as it aims at the proficient use of radio resources. Proper utilization of the radio spectrum requires dynamic spectrum accessing. To this end, spectrum sensing is undoubtedly necessary.
S.k. Shariful Alam +2 more
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Opportunistic sensing for road pavement monitoring [PDF]
, 2020 Road surface state monitoring is of main concern for road infrastructure owners. Hence dedicated measurement campaigns using laser scanning and image analysis are performed on a regular basis. Yet, this type of monitoring comes at a high labor cost and thus it is often limited in coverage and update frequency.
De Coensel, Bert +7 more
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Channel estimation for opportunistic spectrum sensing: Uniform and random sensing [PDF]
2010 Information Theory and Applications Workshop (ITA), 2010 The knowledge of channel statistics, as a result of random fading, interference, and primary user activities, can be very helpful for a secondary user in making sound opportunistic spectrum access decisions in a cognitive radio network. It is therefore desirable to be able to efficiently and accurately estimate channel statistics, even for resource ...
Quanquan Liang +2 more
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Optimality of Myopic Sensing in Multichannel Opportunistic Access [PDF]
IEEE Transactions on Information Theory, 2009 We consider opportunistic communications over multiple channels where the state ("good" or "bad") of each channel evolves as independent and identically distributed Markov processes. A user, with limited sensing and access capability, chooses one channel to sense and subsequently access (based on the sensed channel state) in each time slot. A reward is
Sahand Haji Ali Ahmad +4 more
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Interference-limited opportunistic relaying with reactive sensing [PDF]
IEEE Transactions on Wireless Communications, 2010 This work evaluates opportunistic relaying in the presence of thermal noise as well as interference, when channel sensing is conducted reactively, in slow fading environments. The studied scenario employs a single gateway that provides access towards several destinations with weak links and exploits a network of intermediate relays.
Aggelos Bletsas +2 more
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Opportunistic Multiparty Calibration for Robust Participatory Sensing [PDF]
2017 IEEE 14th International Conference on Mobile Ad Hoc and Sensor Systems (MASS), 2017 While bringing massive-scale sensing at low cost, mobile participatory sensing is challenged by the low accuracy of the sensors embedded in and/or connected to the smartphones. The mobile measurements that are collected need to be corrected so as to accurately match the phenomena being observed.
Sailhan, Francoise +2 more
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