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High-overtone Bulk Acoustic Resonator is an acoustic transducer based on an excitation of a bulk acoustic wave by a thin piezoelectric film bonded to a thick low acoustic loss substrate. This combination of materials aims at providing on the one hand a high frequency transducer as defined by the thickness of the thin piezoelectric layer, and on the other hand the robustness of a thick substrate while...
A wireless sensor network (WSN) consists of a large number of sensor nodes designed to collect information about an environment and transmit the accumulated data using a wireless technology to a base station known as Sink. In this way, the wireless technology is an important factor in the design of a sensor network. Several wireless technologies are available, but IEEE 802.15.4 is the most commonly...
There exist several platforms of wireless sensor networks. Each of them has specific characteristics, such as hardware and software architecture, for example a processing unit, RAM memory, wireless technology. The complexity of novel applications and the number of existing platforms have resulted in the design of hybrid wireless sensor networks. In this paper, we describe the architecture and implementation...
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