Browsing by Author "Wijesinghe, T"

Now showing 1 - 4 of 4

item: Conference-Full-text
Effective methods in collaborative procurement system for energy sector projects in Sri Lanka
(Faculty of Architecture Research Unit, 2022-12-02) Perera, PNR; Wijesinghe, T; Perera, BKC
All governments are bound to provide better infrastructure services for their citizens. Due to numerous financial difficulties governments move towards Collaborative procurement methods to secure infrastructure projects with participation of private sector. Sri Lanka is still lagging in implementing proper collaborative partnerships in infrastructure developments. Sri Lankan energy sector highly depends on hydro and expensive diesel power plants. Because of that, in dry season Sri Lanka is facing huge generation gap in meeting demand. To overcome these challenges Sri Lanka urgently needs to implement new power plants with more economical power sources. Therefore, the aim of the study is set to identify suitable collaborative procurement methods and develop the framework for processing those new projects. Barriers to implement collaborative energy sector projects were identified through literature review and expert interviews. Explored barriers were categorized into Social, Economic, Political and Regulatory discipline and key measures were proposed to overcome such. The suitable procurement routes for each energy project were brought to the new knowledge considering power generation capacity of power plants and prevailing regulations. Finally, the framework was developed to adopt proper implementation of identified procurement methods in Sri Lankan energy sector.
item: Conference-Full-text
The Impact of design changes on apartment projects’ feasibility and project performances in Sri Lanka
(Department of Building Economics, 2024) Sithumina, NAR; Perera, BKC; Wijesinghe, T; Hettiarachchi, DD; Sandanayake, YG; Waidyasekara, KGAS; Ranadewa, KATO; Chandanie, H
Design changes are inevitable in the construction industry. Among all, the consequences of design changes in apartment buildings are more crucial and evident with the existing salient nature of commercial aspects unlike in other building constructions. While the impacts of design changes on project performance have been investigated in usual building construction, there is a lack of focus on apartment construction projects and their reflections towards commercial behaviour. Therefore, this study aims to investigate the impact of design changes on project performance in terms of time, cost and feasibility in the case of apartment building construction in Sri Lanka. The research aim was achieved through the mixed-method approach. A questionnaire survey and expert interviews were conducted as data collection techniques. The impacts of design changes on project performance in apartment projects were identified by the questionnaire survey. Six experts were selected, who had experience in apartment construction projects for the semi-structured interview to investigate the reflections on financial feasibility. The quantitative data were analysed statistically and qualitative data from expert interviews were analysed using the code-based content analysis method. The findings of the research revealed that there is a significant impact of design changes on financial feasibility in apartment projects. Furthermore, ten strategies were proposed to minimise the impact of design changes on project performance and project feasibility, optimising both project performances and the feasibility of the apartment building projects for its whole life cycle.
item: Conference-Abstract
Parameterized diamond tiling for parallelizing stencil computations
(2017) Wijesinghe, T; Senevirathne, K; Siriwardhana, C; Visitha, W; Jayasena, S; Rusira, T; Hall, M
Abstract—Loop tiling is a useful technique used to achieve cache optimization in scientific computations. However, general loop tiling techniques usually fail to improve parallelism in certain scientific computations due to dependences among execution steps. In this paper we implement and experiment on a tiling technique known as Parameterized Diamond Tiling designed based on the data dependences in the program. We implement this tiling scheme in the CHiLL compiler and demonstrate its performance for 4 stencil computations of which, outputs are calculated as a function of neighbouring points. As one of the primary goals of parameterization, in this paper we observe the impact of tile sizes on performance.
item: Conference-Abstract
Video colorization dataset and benchmark
Abeysinghe, C; Wijesinghe, T; Wijesinghe, C; Jayathilake, L; Thayasivam, U
Video colorization is the process of assigning realistic, plausible colors to a grayscale video. Compared to its peer, image colorization, video colorization is a relatively unexplored area in computer vision. Most of the models available for video colorization are extensions of image colorization, and hence are unable to address some unique issues in video domain. In this paper, we evaluate the applicability of image colorization techniques for video colorization, identifying problems inherent to videos and attributes affecting them. We develop a dataset and benchmark to measure the effect of such attributes to video colorization quality and demonstrate how our benchmark aligns with human evaluations.