MERCon - 2019

Permanent URI for this collectionhttp://192.248.9.226/handle/123/14700

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Browsing MERCon - 2019 by Faculty "Architecture"

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    item: Conference-Abstract
    Beacon placement algorithm for hybrid indoor positioning with Wi-Fi and bluetooth low energy
    Nuradha, T; Gnanarathne, I; Perera, L; Denipitiyage, D; Dias, D
    Indoor positioning by wireless means is of significant interest in a wide range of applications; Wi-Fi and Bluetooth Low Energy (BLE) are popular candidate wireless technologies for this. We present a novel BLE beacon placement algorithm that complements existingWi-Fi infrastructure in a hybridWi-Fi/BLE positioning system. Composite signal strength measurements thus obtained, are used to derive machine learning models for location estimation. Our results show that positioning estimates at tablelevel granularity (0.9 m 1.8 m) in a computer laboratory can be achieved with 97% accuracy. This is an improvement of 20% and 30% compared to Wi-Fi and BLE only techniques respectively.
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    item: Conference-Abstract
    Development of a photosensor based on photo dielectric effect of cadmium sulphide
    Kumari, TID; Jayasumana, MASD; Attygalle, D
    A photosensor is an electronic component that detects the presence of visible light, infrared radiation, and/ or ultraviolet radiation. A photosensor which changes its electrical capacitance in the presence of visible light was developed based on the photo-dielectric effect of Cadmium Sulphide (CdS). A thin layer of CdS was deposited on Fluorine-doped Tin Oxide glass using chemical bath deposition technique. The optimum photo-dielectric behaviour was observed for chemical bath temperature between 40-45 ºC. After annealing the deposited film at 180-200 ºC, they have shown a band gap in the range of 2.30– 2.40 eV. Photo-capacitance and photoconductivity in dark and visible light illumination showed a significant change, indicating these films are suitable for photo sensing applications.