A longer sensing time improves the sensing performance; however, with a fixed frame size, the longer sensing time will reduce the allowable data transmission time of the secondary user (SU). In this paper, we try to address the tradeoff between sensing the primary channel for τ seconds of the time slot proceeded by randomly accessing it and randomly accessing primary channel without sensing to ...

This paper presents a real time force sensing instrument that is designed for human gait analysis purposes. It is capable of recording and monitoring ground reaction forces exerted by human foot during various activities such as walking, running and jumping in real time. In overall, force sensing mat mainly consists of three elements: the force sensing mat, signal conditioning circuit and data ...

The high crystallinity ZnO nanoparticles with an average particle diameter 30 nm have been successfully synthesized with a surfactant-mediated method. The cationic surfactant (cetyltrimethylammonium bromide, CTAB) and the hydrous metal chlorides (ZnCl2⋅2H2O) appear to be the good candidates for obtaining a high yield of nanoparticles. The structural and morphological characterizations were carr...

Spectrum scarcity problem is well addressed by cognitive radio. The main role of spectrum sensing is to discover the empty band correctly .This is done with the help of energy detector. The sensing time is a very crucial parameter which regulates the detection probability. In this paper the impact of sensing time has been investigated. The rigorous simulations are done on sensing time parameter...

In cognitive radio networks, the users are supposed to perform spectrum sensing with mush more accuracy to detect the more and more users. But in practice due to fading, shadowing etc., a long observation period of time is needed to make decisions based on detection which results in degradation of sensing performance. In this paper, we presented a new approach called Cuckoo Search for asynchron...

The reconstruction of an unknown temporal-spatial profile from participatory sensing data poses a number of challenges due to uncoordinated user movement and possibly low user involvement. This paper considers the problem of reconstructing such a profile from participatory sensing data by exploiting the theory of compressive sensing. In particular we study the impact of the number of users and ...

remote sensing using small spacecraft arising from multi-objective economic activity problems is getting more and more developed. these satellites require very accurate pointing to specific locations of interest, with high reliability and small latency. the space borne imaging systems always attempted to achieve the highest ground resolution possible with the available technology at the given t...