• A comparison of model parameter estimation methods for complex survey survival data 

  Jayamanne, IT; Ramanayake, A; Jayatilake, RV (Journal of the National Science Foundation of Sri Lanka, 2023)

  When estimation of model parameters is the target in survey data, the inference on the model can be based on a pure model-based approach or a model-assisted approach which is a hybrid approach combining design-based and ...
• Effective Radiation Doses for head and neck multi-slice computed tomography (MSCT) protocols 

  Karunarathna, Sanjaya; Satharasinghe, D. M; Hishaam, Urshella; Pallewatte, Aruna; Jeyasugiththan, Jeyasingam (University of Colombo, 2021)

  Computed tomography (CT) is known as a standard imaging modal ity prescribed for the head and neck diagnostic imaging The introduction of multi-detector row CT (MDCT) has enabled imaging of the entire neck region within ...
• Joint Marginalized Multilevel Model for Study Program Completion and Performance of Students: The Case of Sri Lankan Open and Distance Learners in Management Studies 

  Hapugoda, J. C.; Sooriyarachchi, M. R. (University of Colombo, 2021)

  When data with correlated responses are available, joint models may provide interesting and improved results than modeling the responses separately. Such models between those responses can be developed and their applicability ...
• Joint Multilevel Discrete Competing Risk with Continuous Outcome via Bivariate Copula model – Application to a Dengue Epidemiology Study, Sri Lanka 

  Karunarathna, G.H.S.; Sooriyarachchi, M.R. (University of Colombo, 2021)

  The Competing risk is a special branch of medical research where multiple events can happen. It can encompass the joint modeling approach for dengue epidemiology to model the relationship in different destinations of the ...
• Joint Modelling of Dengue Data using a Semi Parametric Survival Response and a Parametric Count Response 

  Hettiarachchi, H.H.M.; Sooriyarachchi, M.R. (University of Colombo, 2021)

  In Sri Lanka, dengue has become an increasing health concern in the recent past. The spread of Dengue is influenced by the living surroundings. Therefore the dengue data are related to the climate and also correlated ...

• A comparison of model parameter estimation methods for complex survey survival data 

  Jayamanne, IT; Ramanayake, A; Jayatilake, RV (Journal of the National Science Foundation of Sri Lanka, 2023)

  When estimation of model parameters is the target in survey data, the inference on the model can be based on a pure model-based approach or a model-assisted approach which is a hybrid approach combining design-based and ...
• Effective Radiation Doses for head and neck multi-slice computed tomography (MSCT) protocols 

  Karunarathna, Sanjaya; Satharasinghe, D. M; Hishaam, Urshella; Pallewatte, Aruna; Jeyasugiththan, Jeyasingam (University of Colombo, 2021)

  Computed tomography (CT) is known as a standard imaging modal ity prescribed for the head and neck diagnostic imaging The introduction of multi-detector row CT (MDCT) has enabled imaging of the entire neck region within ...
• Joint Marginalized Multilevel Model for Study Program Completion and Performance of Students: The Case of Sri Lankan Open and Distance Learners in Management Studies 

  Hapugoda, J. C.; Sooriyarachchi, M. R. (University of Colombo, 2021)

  When data with correlated responses are available, joint models may provide interesting and improved results than modeling the responses separately. Such models between those responses can be developed and their applicability ...
• Joint Multilevel Discrete Competing Risk with Continuous Outcome via Bivariate Copula model – Application to a Dengue Epidemiology Study, Sri Lanka 

  Karunarathna, G.H.S.; Sooriyarachchi, M.R. (University of Colombo, 2021)

  The Competing risk is a special branch of medical research where multiple events can happen. It can encompass the joint modeling approach for dengue epidemiology to model the relationship in different destinations of the ...
• Joint Modelling of Dengue Data using a Semi Parametric Survival Response and a Parametric Count Response 

  Hettiarachchi, H.H.M.; Sooriyarachchi, M.R. (University of Colombo, 2021)

  In Sri Lanka, dengue has become an increasing health concern in the recent past. The spread of Dengue is influenced by the living surroundings. Therefore the dengue data are related to the climate and also correlated ...
• A study on mobile phone preference of graduates of University of Kelaniya, Sri Lanka 

  Devindi, P.T.N.; Deshani, K.A.D. (University of Colombo, 2020)

  Nowadays, a mobile phone is not just a communication device, but also a device that performs multiple tasks. As a result of changing needs and the preferences of customers, the mobile phone market is highly competitive ...
• Factors associated with child nutritional status in the Karachchi DSD in the Kilinochchi district: A case study 

  Francis, J.; Jayatillake, R.V. (University of Colombo, 2020)

  Malnutrition is a global health problem that is particularly common in children in the developing world. This has been a stagnant problem over the last several decades in Sri Lanka as well, especially in the North and ...
• Comparison of association rule mining performances: market basket analysis of a mini supermarket 

  Hussain, F.S.; Viswakula, S.D. (University of Colombo, 2020)

  Market Basket Analysis discovers consumer purchasing patterns by identifying important and interesting association rules among the products bought in a shopping basket. This field of study is not only useful in the ...
• A case study on final inspection result in garment products 

  Kahatapitiya, J.B.; Bandara, E.R.A.D. (University of Colombo, 2020)

  Quality can be expressed as one of the key factors of business sustainability in the apparel industry. There are several quality controlling mechanisms to ensure product quality. Final inspections, which is the final ...
• Assessment of current status of ICT among households in Colombo district, Sri Lanka 

  Jegathesan, S.G.; Abeygunawardana, R.A.B. (University of Colombo, 2020)

  ICT has become an inseparable component in the development of individuals and countries. This study focuses on Colombo district due to its importance to Sri Lanka, and investigates ICT device availability and its usage ...
• A study on factors associated with nutrient use in paddy production in the districts of Anuradhapura, Polonnaruwa and Ampara in Sri Lanka 

  Silva, K.D.I.; Magalla, C.H. (University of Colombo, 2020)

  Paddy is the main crop cultivated in the districts of Ampara, Anuradhapura and Polonnaruwa using major irrigation systems. A profitable production requires efficient use of fertilizer. Hence, application of a proper ...
• Population Mean Estimation Using Weight Adjustment for Unit Non-Responses 

  Jayamanne, I T; Ramanayake, K P A (Malaysian Journal of Mathematical Sciences, 2021)

  The population mean is often estimated using the sample mean with no consideration to the design of the survey, the survey errors and biases. Although surveys are properly designed to reduce errors, unit non-response and ...
• Sonographic Features of Chronic Kidney Disease in Agricultural Community in Sri Lanka 

  Bandara, Muditha S; Gurunayaka, Buddika; Lakraj, Gamage Pemanatha; Pallewatte, Aruna; Siribaddana, Sisira; Wansapura, Janaka (2021)

  Objectives: The aim of this study was to use ultrasound-based kidney morphological features to classify chronic kidney disease (CKD) in an agricultural community in Sri Lanka where there is a high prevalence of CKD ...
• Nationwide descriptive study of COVID-19 in children below the age of 14 years in Sri Lanka 

  Cabraal, M N S; Samarawickrama, R I U; Kodithuwakk, K A R R; Viswakula, S.D.; Lantra, S R (2021)

  Background: Corona virus disease 2019 (COVID-19) is caused by a novel corona virus which originated in China and spread worldwide to become a global pandemic. Objectives: To identify the demographic and clinical ...
• Multivariate spatio‑temporal approach to identify vulnerable localities in dengue risk areas using Geographic Information System (GIS) 

  Withanage, Gayan P.; Gunawardana, Malika; Viswakula, S.D.; Samaraweera, Krishantha; Gunawardena, Nilmini S.; Hapugoda, Menaka (2021)

  Dengue is one of the most important vector-borne infection in Sri Lanka currently leading to vast economic and social burden. Neither a vaccine nor drug is still not being practiced, vector controlling is the best approach ...
• A comparison of Bayesian Markov chain Monte Carlo methods in a multilevel scenario 

  Rasan, Darshika; Sooriyarachchi, M.R.; Pinto, Vimukthini (Taylor and Francis, 2021)

  Multilevel modeling is a modern approach to deal with hierarchical or a nested data structure which can assess the variability between clusters. Bayesian Markov Chain Monte Carlo (MCMC) methods of estimations are advanced ...
• SAMPLE SIZE REVIEW IN A HEAD INJURY TRIAL WITH ORDERED CATEGORICAL RESPONSES 

  Bolland, K.; Sooriyarachchi, M.R.; Whitehead, J. (Wiley, 1998)

  Between 1993 and 1996, a total of 452 patients were entered into a randomized trial evaluating eliprodil (a non-competitive NMDA receptor antagonist) in patients suffering from severe head injury. The primary efficacy ...
• Comparison of methods of estimation for a goodness of fit test – an analytical and simulation study 

  Pinto, Vimukthini; Sooriyarachchi, M.R. (Taylor and Francis, 2021)

  Multilevel modelling is a novel approach to analyse data which consist of a hierarchical or a nested structure. With advancements in multilevel modelling, there has been an advancement in the estimation techniques and ...
• Comparability of the Effect of Re-Scrutinizing on Two University Selection Methods, ZScore and Common Currency Index (CCI) Method in Sri Lanka 

  Yatapana, P.S.; Sooriyarachchi, M.R. (2018)

  The CCI Method was mathematically and statistically tested and proved as an improved method to the current university selection method, ZScore. Education of Sri Lanka is entirely free and students are selected to limited ...
• SOLUTION TO SUBJECT COMPARABLE PROBLEMS IN PARALLEL EXAMINATIONS: COMMON CURRENCY INDEX (CCI) METHOD 

  Yatapana, P.S.; Sooriyarachchi, M.R. (2018)

  The public examination system in countries like UK and Australia are constantly suffering from the problem of compatibility, between different examinations in the same subject and also different subject combinations set ...

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