Browsing by Author "Ganegoda, NC"

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    item: Thesis-Abstract
    An Analysis on deterministic chaos of exchange rates during COVID -19 outbreak
    (2023) Thathsarani, AA; Ganegoda, NC
    The COVID-19 influence has had a significant impact in a number of areas, including the economies of many nations. Exchange rates also show noticeable fluctuations during the pandemic period, hence analysis of the behaviour of these fluctuations is useful to make better decisions. This study aims to analyze the deterministic chaos of exchange rates during the COVID-19 period in 2020, using Poincare's definition and forecasting with ARIMA and ETS models, using R software. From 1'1 January 2016 to 3181 December 2020, daily rates between the US Dollar, Euro, British Pound, and Japanese Yen and the Sri Lankan Rupee were collected from reports of the Central Bank of Sri Lanka. Data from January 2016 to February 2020 are considered for model fitting and the forecast period is considered from March 2020 to December 2020, considering the COVID-19 first wave and the beginning of the second wave in Sri Lanka. According to Poincare's definition, the properties of deterministic chaos are depicted by all four rates, hence showing deterministic chaos during the considered COVID-19 period. Forecasts using ARlMA and ETS models also determine that the USD, GBP, and Japanese Yen show clear chaotic behaviour, while Euro rates show slight chaotic behaviour at the beginning of the COVID-19 outbreak in Sri Lanka.
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    item: Conference-Full-text
    Vision based office assistant robot system for indoor office environment
    (Information Technology Research Unit, Faculty of Information Technology, University of Moratuwa, Sri Lanka, 2018) Diddeniya, SIAP; Adikari, AMSB; Gunasinghe, HN; De Silva, PRS; Ganegoda, NC; Wanniarachchi, WKIL; Wijesiriwardana, CP
    This paper presents an office assistant robot that can be used in an unstructured indoor office environment. Among many technologies available, we used free and open source software and inexpensive sensors and materials to build the low cost but accurate robot. Robotic Operating System (ROS) indigo was used as the ground operating system on Ubuntu 14.04. The mobile robot, iRobot Create 2 was used as the basic robot and a structure was built to carry a mini-laptop and PrimeSense 3D vision sensor. A workstation computer was used as the central location PC which was kept still and map of office environment is built on it. User is able to give commands to the system via voice and virtual keys by the developed Android application (App). These three units, mobile robot, central workstation and Android devices, communicates through a Wi-Fi connection. The proposed robot could deliver documents or parcels in between office members according to the user commands. We allowed the robot to navigate autonomously and randomly between users and monitored its accuracy by looking at the completion of the route to a target user. Results show that the office assistant delivery robot has above 92% of accuracy in delivery process for a valid user input.