Sai Anand Gopalan

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In this paper, we provide a comprehensive survey of key energy-efficient medium access control (MAC) protocols for wireless body area networks (WBANs). At the outset, we outline the crucial attributes for a good MAC for WBAN. Several sources that contribute to the energy inefficiency for WBAN are identified, and features of the various MAC protocols(More)
We have developed a multi-array side-polished optical-fiber gas sensor for the detection of volatile organic compound (VOC) gases. The side-polished optical-fiber coupled with a polymer planar waveguide (PWG) provides high sensitivity to alterations in refractive index. The PWG was fabricated by coating a solvatochromic dye with poly(vinylpyrrolidone). To(More)
We propose a solution-processable ultraviolet (UV) photodetector with a pn-heterojunction hybrid photoactive layer (HPL) that is composed of poly-n-vinylcarbazole (PVK) as a p-type polymer and ZnO nanoparticles (NPs) as an n-type metal oxide. To observe the effective photo-inducing ability of the UV photodetector, we analyzed the optical and electrical(More)
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