Annual Research Symposium (ARS): Recent submissions

Now showing items 61-80 of 1325

The red shifts of pulses of light which are emitted at a point on the surface of a sphere and at a point inside of the sphere comprising electrically counterpoised dust with constant uniform density as observed by an observer in a large distance away in the exterior region

Wimaladharma, N.A.S.N.; de Silva, N.; Hewageegana, P.S. (University of Kelaniya, 2013)

A sphere, comprising a special kind of matter, with electrically counterpoised dust in which all the elastic forces have been cancelled out has been considered. A static spherically symmetric solution to Einstein’s field ...
The velocity of a particle relative to an observer instantaneously at rest coinciding with the point through which the particle passes in a spherical distribution of matter comprising electrically counterpoised dust with constant uniform density

Wimaladharma, N.A.S.N.; de Silva, N.; Hewageegana, P.S. (University of Kelaniya, 2013)

A sphere comprising a special kind of matter, electrically counterpoised dust in which all the elastic forces have been cancelled out, has been considered. A static spherically symmetric solution to Einstein’s field ...
Thetanulls of cyclic curves of genus 4

Wijesiri, G.S. (University of Kelaniya, 2013)

Let be an irreducible smooth projective cyclic curve of genus defined over the complex field . These are by definition compact Riemann surfaces of genus (unless we allow singular points) admitting an automorphism such ...
Derivation and application of a Stochastic Differential Equation (SDE) Model for cricket

Weerasinghe, W.M.H.N.; Mallawa Arachchi, D.K. (University of Kelaniya, 2013)

Stochastic Differential Equations (SDE) can be used to model many dynamical systems in place of the Markov chain approach. In this research, the SDE model that accounts for the score of a limited over cricket match is ...
Modeling inflation in Sri Lanka using time series and econometric approaches

Udani, S.A.L.M.; Jayasundara, D.D.M. (University of Kelaniya, 2013)

Inflation is the most important macro economic variable often used to measure the economic growth of a country. It is the rise of the general level of prices of goods and services in an economy over a period of time. In ...
Roots of a cubic and simple proof of Fermat’s last theorem for n=3

Ubeynarayana, C.U.; Piyadasa, R.A.D.; Munasinghe, J.; Ekanayake, E.M.P. (University of Kelaniya, 2013)

Introduction: Fermat’s last theorem (FLT) which was written in 1637, became public in 1670, without proof. It has not only evoked the interest of mathematicians but baffled many for over three hundred and fifty years ...
A Virtual Dressing System

Rajasinghe, R.M.C.N.A.; Wijegunasekara, M.C. (University of Kelaniya, 2013)

Virtual dressing rooms are a relatively new concept, which is slowly becoming a trend on various fashion websites. The virtual dressing room allows a customer who is at home, to virtually try on dresses, and other fashions ...
Roach type of graphs and the characteristics of their partitioning

Perera, K.K.K.R. (University of Kelaniya, 2013)

The goal of the graph partitioning problem is to find groups such that entities within the same group are similar and different groups are dissimilar. Spectral clustering methods use eigenvalues and eigenvectors of matrices ...
Improved n-type behaviour of Cu2O by successive electrodeposition of Cu and Cu2O

Kalubowila, K.D.R.N.; Wijesundera, R.P.; Siripala, W. (University of Kelaniya, 2013)

Cuprous oxide (Cu2O) is a non-toxic, low cost and potentially attractive material as an active semiconductor for solar cell applications. Further, it has an added advantage of direct band gap of 2 eV. Cu2O typically shows ...
Stochasticity in SIRV Models for the transmission of epidemic diseases

Hasanthika, N.H.E.; Kulathunga, D.D.S.; Mallawa Arachchi, D.K. (University of Kelaniya, 2013)
Fabrication of Cu2O Homojunction Solar Cell

Gunawardhana, L.K.A.D.D.S.; Wijesundera, R.P.; Siripala, W. (University of Kelaniya, 2013)

Cu2O, a natural p-type semiconductor with a narrow band gap of 2 eV, is an attractive material for photovoltaic devices because of its nontoxicity and low production cost. In early investigations, p-Cu2O/metal Schottky ...
Performance of k-mean data mining algorithm with the use of WEKA-parallel

Gunasekara, R.P.T.H.; Dias, N.G.J.; Wijegunasekara, M.C. (University of Kelaniya, 2013)

This study is based on enhancing the performance of the k-mean data mining algorithm by using parallel programming methodologies. To identify the performance of parallelizing, first a study was done on k-mean algorithm ...
Unveil the power of statistics through Open Source Software

Dissanayake, A.; Rupasinghe, T. (University of Kelaniya, 2013)

In the modern world, researchers use statistical software packages like SPSS, SAS, STATA, Minitab for advanced data analyses. However, license cost of these statistical software packages is a major problem for researchers ...
Level of stress among Advanced Level students: A case study

Arachchi, A.P.K.; Jayasundara, D.D.M. (University of Kelaniya, 2013)

The purpose of this study is to determine the factors that affect the stress level of A/L students and determine the relationships between stress level and those factors. Stress affects people’s behaviors, communications, ...
Prevalence and determinants of Low Back Pain (LBP) among nurses in different health care units in four hospitals in Colombo, Sri Lanka

Warnakulasuriya, S.S.P.; Peiris-John, R.; Sivayogan, S.; Sathiakumar, N.; Coggan, D.; Wickremasinghe, A.R. (University of Kelaniya, 2013)

Introduction: Hospitals are complex systems that rely on nursing care in diverse care settings where many nursing job tasks are physically and psychologically demanding. In healthcare, the highest prevalence of Low Back ...
Phonemic and phonological development in the speech of 3 to 4 year old Sinhala-speaking children living in the Rathnapura district whose mothers are employed or not employed

Wanniarachchi, W.A.G.M.; Hettiarachchi, S. (University of Kelaniya, 2013)

This study investigates the phonemic and phonological development of Sinhala speaking children, age between 3 to 4 years, living in the Rathnapura district. It focused on the possible effect of age, gender and socio economic ...
Development of Monosyllabic Trochee Polysyllabic (MTP) Test in Sinhala for Native Language Speakers in Sri Lanka

Senanayake, S.M.A.I. (University of Kelaniya, 2013)

Development of Monosyllabic-Trochee-Polysyllabic (MTP) test in Sinhala aims to be used in measuring auditory performances such as identification and auditory discrimination in children who are audiological rehabilitated ...
Typical phonemic and phonological development of three year old Sri Lankan Tamil – speaking children in the Colombo district

Saleem, S.; Hettiarachchi, S. (University of Kelaniya, 2013)

Background: In Sri Lanka, speech and language therapists currently use standardized English language norms in clinical practice for diagnosis and when planning intervention for speech disorders. Cross - linguistic studies ...
The validity of body mass index in predicting body fat percentage

Piyasena, W.B.A.I.; Jayasena, R.S.S.; Subasinghe, Wasantha; Gunasekara, K.A.D.C. (University of Kelaniya, 2013)

Introduction: Obesity has become a leading health concern worldwide. It has become a foremost factor for morbidity and mortality due to non communicable diseases. (Eg: Ischemic Heart Disease, Diabetes Mellitus). Body Mass ...
A study of phonetic and phonological development of Sinhala speaking children in the Puttalam district age 3:0-3:11 years

Nonis, P.D.M.; Hettiarachchi, S. (University of Kelaniya, 2013)

Introduction: Normative data on speech development are essential to differentiate children with speech difficulties from typically developing children. Due to the lack of normative data on Sinhala, currently, clinicians ...

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