DSpace Home
→
International Research Conference of the Open University of Sri Lanka
→
IRC-OUSL 2025
→
12. PHYSICAL SCIENCES
→
Recent submissions

12. PHYSICAL SCIENCES: Recent submissions

Now showing items 1-20 of 22

∆-OPEN SETS AND δ-SEMI CLOSED SETS IN FUZZY TOPOLOGICAL SPACES

Piriyalucksan, P.; Arunmaran, M. (The Open university of Sri Lanka, 2025)

The study of fuzzy topological spaces was introduced by Chang in 1968, following the discovery of fuzzy sets by Zadeh. So far, several types of open sets and closed sets in fuzzy topological spaces have been documented in ...
COMPUTING THE ℎ-FUNCTION OF THE COMPLEX PLANE WITH A DELETED LINE SEGMENT, WITH AND WITHOUT USING THE PRIME FUNCTION

Piriyalucksan, P.; Arunmaran, M. (The Open university of Sri Lanka, 2025)

The likelihood of a particle launched from a fixed point z_0 in a region Ω initially leaving the area within the distance r of z_0 is the harmonic-measure distribution function, or the h-function. This function is ...
COMPARATIVE ANALYSIS OF EXPONENTIAL SMOOTHING MODELS FOR FORECASTING THE WATER QUALITY INDEX

Dissanayake, H.; Punchi-Manage, R. (The Open university of Sri Lanka, 2025)

Surface water quality plays a significant role in maintaining healthy ecosystems and supporting both human and aquatic life, making reliable monitoring and forecasting essential due to increasing pollution and environmental ...
COMPARATIVE SPATIAL ANALYSIS OF ROAD TRAFFIC ACCIDENTS USING ORDINARY KRIGING AND INVERSE DISTANCE WEIGHTING

Sashinka, D.; Yapa, R. D.; Punchi-Manage, R. (The Open university of Sri Lanka, 2025)

Road traffic accidents are a significant public safety concern, especially in urban areas where congestion and infrastructural limitations increase the likelihood of collisions. This study investigates road traffic accidents ...
COMPARATIVE ANALYSIS OF POLYSULFIDE ELECTROLYTE SYSTEMS FOR THE PERFORMANCE ENHANCEMENT IN CdS QUANTUM DOT-SENSITIZED SOLAR CELLS

Ajward, N. F.; Fernando, J. V. P.; Perera, V. P. S. (The Open university of Sri Lanka, 2025)

This study has focused on improving the performance and stability of TiO2 /CdS quantum dot sensitized solar cells by investigating two electrolyte optimization methods. One method has focused on solvent effects, and the ...
STUDY ON EXTRACTION, CHARACTERISATION AND CHEMICAL ANALYSIS OF STARCH OBTAINED FROM JACKFRUIT SEED: A COMPARISON WITH COMMERCIAL STARCH

Kulasooriya, R. A. K. M.; Arasaretnam, S. (The Open university of Sri Lanka, 2025)

The present study focuses on the extraction, characterization, and comparative evaluation of starch derived from jackfruit (Artocarpus heterophyllus) seeds against commercially available starch. Starch extraction was carried ...
MAGNETIC FIELD INFLUENCE ON VISCOUS FINGERING INSTABILITIES IN ENHANCED OIL RECOVERY WITHIN INCLINED DOMAINS

Weerasinghe, A. E. K. P.; Sachinthani, A. G. T. S.; Sahabandu, C. W. (The Open university of Sri Lanka, 2025)

Viscous fingering can be counted as one of the major challenges in enhanced oil recovery (EOR), resulting in unstable flow patterns during the fluid displacement process. This instability often arises when a less viscous ...
AN OPTIMIZATION MODEL TO REDUCE THE HUMAN FATALITIES IN SRI LANKA DUE TO COVID-19 CONSIDERING DIFFERENT NON- PHARMACEUTICAL INTERVENTION PLANS

Paramadevan, P.; Daundasekara, W. B. (The Open university of Sri Lanka, 2025)

By considering Sri Lanka's limited healthcare resources and economic productivity in the absence of a vaccine, this study aims to control an epidemic outbreak while balancing its sanitary and economic repercussions to ...
SOLID-STATE SYNTHESIS OF SODIUM HEXA-TITANATE FROM NATURAL RUTILE MINERAL

Wickramarathna, W. P. U. S.; Rathuwadu, N. P. W. (The Open university of Sri Lanka, 2025)

Sodium titanates (NTOs) are emerging as promising electrode materials for advanced energy storage devices, including sodium-ion batteries (SIBs), lithium- ion batteries (LIBs), and supercapacitors, owing to their favourable ...
CEPHEID VARIABLES IN NGC 1866: PHOTOMETRIC WORKFLOW, CMD PLOTTING, AND P–L RELATION CONSTRUCTION WITH HST AND TESS OBSERVATIONS

Alawathugoda, R M. B. M. B.; Indika Medagangoda, N.; Kandeepan, S.; Attygalle, M. L. C. (The Open university of Sri Lanka, 2025)

This study presents a comprehensive analysis of Classical Cepheid variable stars within the young, metal-rich Globular Cluster NGC 1866. High-resolution imaging from the Hubble Space Telescope (HST) in the F555W and F814W ...
CONTROLLED RELEASE OF INDOMETHACIN USING MIL-101(Fe): A PROMISING METAL-ORGANIC FRAMEWORK FOR DRUG DELIVERY

Rathnayake, J. P. I. U.; Hettiarachchi, C. V. (The Open university of Sri Lanka, 2025)

The use of metal–organic frameworks (MOFs) as drug carriers offers promising potential for controlled drug delivery systems. MIL-101(Fe) is a stable and non- toxic MOF with outstanding pore capacity and wide pore windows ...
TIME-SERIES ANALYSIS OF FV SCUTI WITH TESS: ECLIPSE DETECTION AND PERIOD EVOLUTION

Piyadasa, Theekshana; Medagangoda, N. I. (The Open university of Sri Lanka, 2025)

Cataclysmic variables (CVs) are binary star systems where a White Dwarf (WD) accretes matter from a donor star, and that accreted matter typically forms an accretion disk around the WD. Classical novae, a subclass of CVs, ...
DEVELOPMENT OF CuO/rGO NANOWIRE ELECTRODES FOR HYBRID ELECTROCHEMICAL SUPERCAPACITOR

Gamage, G. N.; Dilshan, K. A. H. A.; Shehan, K. A. D.; Rukshan, G. G. C.; Jayanetti, J. K. D. S.; Kalubowila, K. D. R. N. (The Open university of Sri Lanka, 2025)

The development of high-performance and cost-effective electrode materials is crucial in advancing supercapacitor technology. For supercapacitors, nanostructured Cu oxides are promising materials due to their high theoretical ...
DEVELOPING A MULTIVARIATE FLOOD RISK INDEX FOR THE KELANI AND KALU RIVER BASINS IN SRI LANKA USING FUZZY LOGIC

Amarathunga, J.; Erandi, K. K. W. H.; Peiris, H. O. W.; Perera, S. S. N. (The Open university of Sri Lanka, 2025)

In Sri Lanka, rapid urbanization in recent years has intensified flood risks in vulnerable areas. Since assessments based solely on climate change factors may reduce the accuracy of evaluations, this study develops a ...
GREEN SYNTHESIS OF SILICA NANOPARTICLES USING RICE HULL AND ITS IMPACT ON GROWTH AND SEED GERMINATION OF RICE (Oryza sativa)

Udagedara, D. C. D.; Jayawickrama, U. K. G. A.; Weerahewa, H. L. D.; Dikkumbura, A. S. (The Open university of Sri Lanka, 2025)

Recent advances in nanotechnology have enabled the development of nanofertilizers that offer controlled nutrient release, improved plant uptake, and reduced environmental impact. Among these, silica nanoparticles (SiNPs) ...
FORECASTING THE WATER QUALITY INDEX USING THE SEASONAL AUTOREGRESSIVE MOVING AVERAGE MODEL AND THE PROPHET MODEL

Dissanayake, H.; Punchi-Manage, R. (The Open university of Sri Lanka, 2025)

Surface water quality (WQ) often exhibits strong seasonal and long-term trends influenced by both natural processes and human activity. Accurate WQ forecasting is vital for ecosystem protection, public health, and environmental ...
SYNTHESIS OF POLY ARYL HYDROCARBONS VIA ULLMANN HOMOCOUPLING OF 1,4-DIBROMOBENZENE

Lekamge, D. D.; Fernando*, I. R. (The Open university of Sri Lanka, 2025)

Aryl-aryl coupled polymers are a class of conjugated polymers that possess useful chemical, electrochemical and photochemical properties. Transition metal- catalysed C-C cross-coupling reactions employed in the synthesis ...
MODELING ROAD TRAFFIC ACCIDENTS IN COLOMBO USING BINARY LOGISTIC REGRESSION MODEL AND SPATIAL ANALYSIS

Dayapoorani, V.; Punchi-Manage, R. (The Open university of Sri Lanka, 2025)

Road traffic accidents have become a serious concern, causing millions of deaths and severe injuries annually. In the analysis of road accidents in Sri Lanka, Colombo contributes significantly. This study aims to identify ...
IDENTIFYING ROAD ACCIDENT HOTSPOTS USING LINEAR NETWORK POINT PROCESSES: A CASE STUDY IN THE KANDY POLICE DIVISION, SRI LANKA

Sashinka, D.; Yapa, R. D.; Punchi-Manage, R. (The Open University of Sri Lanka, 2025)

Road accidents are spatially constrained events that require analytical approaches that account for the underlying transport network. Traditional area-based methods often underestimate accidents along roads, as they ...
REFINEMENT OF STELLAR PARAMETERS FOR THE ECLIPSING BINARY SYSTEM KIC 8569819 USING STELLAR MODELING APPROACH

Dharmathilaka, J. A. D. M.; Adassuriya, J.; Jayaratne, K. P. S. C.; Gutiérrez, Jordi L. (The Open University of Sri Lanka, 2025)

Eclipsing binary systems with a Delta (δ) Scuti component serve a vital role in deriving precise fundamental stellar parameters and testing stellar evolution models. This study mainly focuses on the Kepler target KIC ...

Recently added

12. PHYSICAL SCIENCES: Recent submissions

Search DSpace

Browse

All of DSpace

This Collection

My Account