Browsing by Author "Chandrasiri, R"

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Open Access
Bluetooth embedded inertial measurement unit for real-time data collection for gait analysis
(2013 International Conference on Indoor Positioning and Indoor Navigation, 2013-10) Chandrasiri, R; Abhayasinghe, N; Murray, I
—Inertial Measurement Units (IMUs) are often used to measure motion parameters of human body in indoor/outdoor localization applications. Most of commercially available low-cost IMUs have limited number of sensors and are often connected to a computer by a wired connection (usually by USB). The disadvantage of using wired IMUs in human gait measurement is that, the wires disturb the natural gait patterns. The existing IMUs with wireless connectivity solve that problem, but are relatively high cost. This paper describes the development and testing of a miniature IMU that can be connected to a Windows based computer or an Android based mobile device through Bluetooth. The IMU consists of a 3-axis accelerometer, 3-axis gyroscope, 3-axis magnetometer, a temperature sensor, a pressure sensor and an ambient light sensor. Sensors are sampled at a frequency configurable by the user with a maximum set at 100 Hz. Raw sensor data are streamed through the integrated Bluetooth module to the host device for further processing. The IMU is also equipped with a microSD card slot that enables on-board data logging. The power usage of the Bluetooth transmitter is optimized because only the sampled sensor data are transmitted. The windows application can be used to view sensor data, plot them and to store them into a file for further processing. Android application can be used to view data as well as to record data into a file. The small size of the device enables it be attached to any part of lower or upper human body for the purpose of gait analysis. Comparison of the performance of the device with a smartphone indicated that the output of the IMU is comparable to the output of smartphone.
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From Learners to Earners: The Role of Education in Shaping Online Freelancers within the Gig Economy
(University of Nigeria Department of Mass Communication, 2026-01-05) Dasanayaka, L.N; Madanayake, T.B; Jayasekara, K.G; Ileperuma, T.D; Chandrasiri, R; Bandara, G
In developing nations, education systems prioritise employability over broader academic goals, often overlooking the preparation needed for freelance platforms. Yet, the digital economy presents a rapidly expanding avenue for youth employment and economic empowerment. This systemic oversight leaves many undergraduates unprepared to capitalise on the increasing global demand for digital and professional freelance services. Objective: This study aims to identify the attitudes, behaviours, and skills that undergraduates need to succeed in online freelancing, addressing the knowledge gap between the popularity of digital self-employment and the factors driving undergraduate success in this field. Methodology: This study employed an inductive approach, focusing on undergraduate freelancers in Sri Lanka. Snowball sampling was utilised to select 21 participants, and in-depth interviews were conducted to collect data. The data were subsequently analysed using NVivo thematic analysis, with analysis continuing until saturation was reached. Results: The results of this study revealed six key themes that significantly impact making an online freelance career for undergraduates in Sri Lanka: (I) Growth Mindset, (II) Work-life balance, (III) Flexibility, (IV) Effective Communication, (V) Proactive engagement and (VI) Developing Core Competencies Conclusion: Although the rising popularity of freelancing online among undergraduates is a significant trend, success is primarily attributed to various factors that enable freelancers to reach their full potential. Addressing these factors will be the solution to helping undergraduates navigate the online freelancing field. Unique Contribution: This study makes a significant contribution by empirically identifying and systematically categorising the key competencies required for undergraduate success in transitioning to online freelancing. It provides a novel, evidence-based framework for educators and policymakers seeking to prepare students for sustainable career opportunities and economic empowerment in the digital economy (SDG 8). © 2025, University of Nigeria Department of Mass Communication. All rights reserved.