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In recent years, localization has been recognized as an important supporting technology for wireless sensor networks (WSNs). Along with the increase in WSN indoor applications, indoor localization has become a hot research topic and many localization algorithms have been studied. Among these algorithms, the localization method based on compressive sensing theory emerges as a popular approach to indoor...
Wireless Sensors Networks (WSNs) is the critical part of the Internet of Things (IOTs). However, most of the wireless sensors in WSNs also use batteries as their power supply. The finite battery life has limited the development and application of WSNs. The self-powering device could be a good solution, which performs both an energy harvester and wireless sense function. Vibrations with frequencies...
Wireless Sensor Networks (WSNs) have undergone rapid advancement over the past few decades. Typically, batteries power these wireless sensors. However, in many cases, battery life is preventing the WSNs from being widely applied. The power supply bottlenecks of WSNs would be solved by the self-powering sensors completely. As vibration energy is ubiquitous, energy harvesting from environment vibration...
Energy conservation in wireless sensor networks (WSN) has gained the attention of several research efforts. Several techniques have been proposed to optimize power consumption, and hence increasing network life time, by focusing on different aspects of the functions of a single wireless sensor node such as data aggregation, efficient routing, sleep/wake scheduling, and buffer management. One of the...
We investigate several characteristics of active/sleep model in wireless sensor networks (WSNs). Here, each node of the investigated WSN may be randomly and alternatively in an ACTIVE status or a SLEEP status. When a referenced sensor node is in an ACTIVE status, it may generate data packets with a given stochastic process and may transmit/receive a data packet with a random period of time. However,...
This paper presents the design, fabrication and functional testing of a fully implantable, flexible, Parylene-enabled neurostimulator that features single channel wireless stimulation capability. The system comprises a CMOS stimulator chip, a fold-and-bond RF coil, two platinum electrodes, and discrete capacitors. The MEMS components are fabricated with a Parylene-metal skin technology, and the system...
This paper presents the patterns about shifting a computer game to a physical game which is usually the pervasive and social computing based on wireless sensor networks (WSN), RFID, GPS and other mobile devices. These shift patterns, focused on the aspects that most computer games highlight and guidelines for transforming these aspects into physical forms, help people design and implement new physical...
In wireless sensor network (WSN), the performance and effectiveness of the network is highly dependant on its geographical coverage. However, in many applications the actual coverage cannot be guaranteed to meet the requirement due to the random sensor deployment. While existing methods tend to exploit mobility to relocate all the sensors to be evenly distributed, a wireless array-based cooperative...
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