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Comparison between r-d and r-k class estimators in Misspecified linear regression model

Kayanan, M.; Wijekoon, P. (Postgraduate Institute of Science , University of Peradeniya, Sri Lanka, 08-09-17)

A significance attention has been paid by researchers about misspecification due to excluding some relevant explanatory variables and multicollinearity among the explanatory variables in linear regression model. Several ...

Combining Lasso and Liu type estimator in the linear regression model

Kayanan, M.; Wijekoon, P. (International Statistical Institute, 21-08-19)

The Ordinary Least Square Estimator (OLSE) has been widely used to estimate unknown parameters in the linear regression model. Since OLSE produces high variance on the estimates when multicollinearity exists among the ...

The knowledge gathering and study pattern of undergraduate students of the Vavuniya campus of the university of Jaffna

Kayanan, M.; Kuhanesan, S. (South Eastern University of Sri Lanka, 20-12-16)

The study examined the knowledge gathering and study pattern as contemplate example of undergraduates of Vavuniya Campus of the University of Jaffna. Precisely, the analysis made to determine the impact of gender and level ...

Multiclass classification approach to identify the stage of autism spectrum disorder

Kayanan, M.; Wijekoon, P. (Department of Statistics and Computer Science, Faculty of Science, University of Peradeniya, Sri Lanka, 09-01-20)

Autism Spectrum Disorder (ASD) is known as a neurodevelopmental disorder that affects communication, social interaction and behavioural skills. ASD affects the children at the age of two years old and continues lifelong. ...

Modified Stochastic Restricted Ridge Estimator in Misspecified Linear Regression Model

Kayanan, M.; Wijekoon, P. (Institute of Applied Statistics, Sri Lanka, 28-12-18)

Misspecification of the linear model due to omitting relevant explanatory variable from the model and multicollinearity among the explanatory variables are considered as two of the problems which are considered seriously ...

Variable Selection via Biased Estimators in the Linear Regression Model

Kayanan, M.; Wijekoon, P. (Scientific Research Publishing, 28-02-20)

Least Absolute Shrinkage and Selection Operator (LASSO) is used for variable selection as well as for handling the multicollinearity problem simultaneously in the linear regression model. LASSO produces estimates having ...

Stochastic Restricted LASSO-Type Estimator in the Linear Regression Model

Kayanan, M.; Wijekoon, P. (Hindawi, 30-03-20)

Among several variable selection methods, LASSO is the most desirable estimation procedure for handling regularization and variable selection simultaneously in the high-dimensional linear regression models when multicollinearity ...

Performance of LASSO and Elastic net estimators in Misspecified Linear Regression Model

Kayanan, M.; Wijekoon, P. (Faculty of Science, University of Peradeniya, Sri Lanka, 16-09-19)

Ridge Estimator (RE) has been used as an alternative estimator for Ordinary Least Squared Estimator (OLSE) to handle multicollinearity problem in the linear regression model. However, it introduces heavy bias when the ...

Optimal estimators in misspecified linear regression model with an application to real-world data

Kayanan, M.; Wijekoon, P. (Taylor & Francis, 15-04-19)

In this article, we propose the sample information optimal estimator and the stochastic restricted optimal estimator for misspecified linear regression model when multicollinearity exists among explanatory variables. ...

Stochastic Restricted Biased Estimators in Misspecified Regression Model with Incomplete Prior Information

Kayanan, M.; Wijekoon, P. (Hindawi, )

The analysis of misspecification was extended to the recently introduced stochastic restricted biased estimators when multi collinearity exists among the explanatory variables. The Stochastic Restricted Ridge Estimator ...

Performance of Existing Biased Estimators and the Respective Predictors in a Misspecified Linear Regression Model

Kayanan, M.; Wijekoon, P. (Scientific Research Publishing, 31-10-17)

In this paper, the performance of existing biased estimators (Ridge Estimator (RE), Almost Unbiased Ridge Estimator (AURE), Liu Estimator (LE), Almost Unbiased Liu Estimator (AULE), Principal Component Regression Estimator ...

Group Graph Measures of Brain Networks New Concepts and Definitions

Subaramya, V; Perera, A.A.I; Ratnarajah, N (Postgraduate Institute of Science, University of Peradeniya, 10-11-18)

Brain networks consist of cortical and subcortical regions as nodes and connections between them as edges. These brain networks convey a huge amount of information that has been almost unexplored previously and the ...

Rubik’s Revenge Application Tool

Subaramya, V (South Eastern University of Sri Lanka, 21-12-16)

The Rubik's revenge is really captivating and fascinating puzzle. It is a three dimensional game. In the literary survey, there are several applications available in Rubik’s revenge. Some of them are in two dimensional ...

Algorithm aspects of Rubik’s Cube 3D game

Subaramya, V.; Krishnakumar, K. (The Open University of Sri Lanka, 28-11-13)

The Rubik's Cube is really captivating and fascinating puzzle. It is a 3D game. In the literary survey, there are several applications available in Rubik’s cube. Some of them are games, some of them have solution. But there ...

Environmentally friendly Methods to Control Eichhornia crassipes

Vijitharan, S.; Sivarajag, S.; Loganathan, P. (Ministry of Mahaweli Development & Environment, 20-01-17)

The water hyacinth (Eichhornia crassipes) is a free-floats aquatic plant that has invaded the waterways and reservoirs in the Dry Zone of Sri Lanka. The study focused on preparing a compost using water hyacinth using the ...

Consumer Awareness For Identification Of Pesticide Contamination In Leafy Vegetables

Loganathan, P.; Vijitharan, S. (Postgraduate of Institute of Science, University of Peradeniya, 06-08-16)

Consumer awareness is the best way to reduce pesticide related health effects. Many vegetables in the market are contaminated with agrochemicals. Therefore, the present study was designed to investigate the importance of ...

Evaluation of the Structure and Functions of Home Gardens in Vavuniya District, Sri Lanka

Vijitharan, S (Vavuniya Campus of the University of Jaffna, 2017)

Home gardens are conventional agro-forestry systems and characterized by the complexity of their structure and multiple functions. The objective of the study was to investigate the socioeconomic features of the study ...

A Feasibility Study of Compost Preparation by Using Household Waste (Kitchen Waste and Garden Waste) (A Case Study in KopayDS Division, Jaffna District)

Vijitharan, S (International Institute of Knowledge Management, 17-08-18)

Home composting is a simple, cost effective and environmentally friendly method to manage the household biodegradable waste. The objectives of the study were to investigate the domestic waste management at household level, ...

Pre-harvest Interval and Pesticide Contamination in Different Vegetablescollected from Local Market of Vavuniya, Sri Lanka

Vijitharan, S.; Loganathan, P. (International Research Journal of Environmental Sciences, 03-02-16)

Pesticides are designed to kill the pest and also it’s harmful to human. Synthetic pesticides not only pollute the environment but also persist in vegetables and passed through the food chain. The objective of this study ...

Awareness of Banned Pesticide usage among Vegetable Grower’s and Health impacts in the Vavuniya District

Vijitharan, S.; Loganathan, P. (Faculty of Agriculture, University of Jaffna, Sri Lanka., 15-10-15)

Pesticides kill or deter the destructive activity of the target organism and they posses’ inherent toxicities that endanger the health of the farmers, consumers and the environment. The objectives of this study were to ...

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