K. Pirapaharan, After the Tsunami: Relief and Rehabilitation in Sri Lanka. 2006.

S.S.Sivakumar, Electromagnetism and Systems: Telecommunications, Power, Remote Sensing, Biomedical & Environmental Systems. 2013.

K. Pirapaharan and N. Okamoto, “Resonant Modes of a Concentric Spherical Cavity with Conically Stratified Medium,” IEEE Transaction on Microwave Theory and Techniques, vol. 49, pp. 111–118, 2001.

K. Pirapaharan and N. Okamoto, “A Multiport Representation of the Step Junction of Two Circular Dielectric Waveguides,” IEICE Transaction on Electronics, vol. E84-C, pp. 1697–1702, 2001.

K. Pirapaharan and N. Okamoto, “A Multiport Representation of the Step Junction of Two Circular Dielectric Waveguides and Its Application to the Stepwise Approximation of a Circular Conical Dielectric Waveguide,” IEEJ Transaction on Fundamentals and Materials, vol. 122, pp. 13–19, 2002.

P. R. P. Hoole, K. Pirapaharan, and S. R. H. Hoole, “Electromagnetic Modeling of Lightning Return Stroke Currents: Waveguide and Circuit Models,” Journal of the Japan Society of Applied Electromagnetics and Mechanics, vol. 19, pp. 167–170, 2011.

P. R. P. Hoole, K. Pirapaharan, and S. R. H. Hoole, “An Electromagnetic Field Based Signal Processor for Mobile Communication Position-Velocity Estimation and Digital Beam-forming: An Overview,” Journal of the Japan Society of Applied Electromagnetics and Mechanics, vol. 19, pp. 33–36, 2011.

C. V. Aravind, Norhisam, P. R. P. Hoole, K. Pirapaharan, and J. Wiselin, “Study on Load Profiling and Energy management System,” Asian Journal of Electrical Sciences(AJES), vol. 1, pp. 29–33, 2012.

S.Thirukumaran, P. R. P. Hoole, R.Harikrishnan, K. Jeevan, K. Pirapaharan, and S. R. H. Hoole, “Aircraft-Lightning Electrodynamics using the Transmission Line Model Part I: Review of the Transmission Line Model,” Progress In Electromagnetic Research (PIER) M, vol. 31, pp. 85–101, 2013.

D. S. D. Sliva et al., “Switching of Band Selection for Micro-Scale RF Energy Harvesting,” Asian Journal of Electrical Sciences(AJES), vol. 2, pp. 29–35, 2013.

S.Thirukumaran, P. R. P. Hoole, R.Harikrishnan, K. Jeevan, K. Pirapaharan, and S. R. H. Hoole, “A New Electric Dipole Model for Lightning-Aircraft Electrodynamics,” The International Journal for Computation and Mathematics in Electrical and Electronic Engineering (COMPEL), vol. 33, no. 1/2, pp. 540–555, 2014.

C. V. Aravind, K. Pirapaharan, Y. C. Tan, and G. P. Ramesh, “Harmonic Signal Separation in Domestic Loads through Blind Source Technique,” International Journal of Scientific & Engineering Research (IJSER), vol. 5, no. 4, pp. 184–187, 2014.

J. Fisher, P. Hoole, K. Pirapaharan, and S. Hoole, “Applying a 3D Dipole Model for Lightning Electrodynamics of Low-Flying Aircraft,” IETE Journal of Research, vol. 61, pp. 91–98, 2015.

K. Sureshmanic, K. Pirapaharan, A. Saadha, and C. V. Aravind, “Characterisation and Separation of Brainwaves Signals,” Journal of Engineering Science and Technology (JESTEC), pp. 32–44, 2015.

K. Sureshmanic, C. V. Aravind, A. Saadha, and K. Pirapaharan, “Implementation of real time Brainwave Visualization and Characterization,” Journal of Engineering Science and Technology (JESTEC), pp. 50–59, 2015.

K.S.Senthilkumar, K. Pirapaharan, and P. R. P. Hoole, “Single Perceptron Model for Smart Beamforming in Array Antennas,” International Journal of Electrical and Computer Engineering (IJECE), vol. 6, pp. 2300–2309, 2016.

K. Pirapaharan, H. Kunsei, K. S. Senthilkumar, P. R. P. Hoole, and S. R. H. Hoole, “A Robust, 3-Element Triangular, Reflector-less, Single Beam Adaptive Array Antenna for Cognitive Radio Network: Inter-element Distance Dependent Beam,” Journal of Telecommunication, Electronic and Computer Engineering, vol. 8, pp. 79–82, 2016.

S. S. Aiau, M. Kavi, K. Pirapaharan, P. R. P. Hoole, M. Anyi, and S. R. H. Hoole, “PNG’s Energy Sector and Estimation of Renewable Energy Resources in Morobe Province, Papua New Guinea: Solar and Wind Power for New Umi Township,” Journal of Telecommunication, Electronic and Computer Engineering, vol. 8, pp. 26–30, 2016.

P. R. P. Hoole et al., “Determining Safe Electrical Zones for Placing Aircraft Navigation, Measurement and Microelectronic Systems in Static Thunderstorm Environment,” International Journal of control Theory and Applications, vol. 10, pp. 221–229, 2017.

P. R. P. Hoole et al., “Power Transformer Fire and Explosion: Causes and Control,” International Journal of control Theory and Applications, vol. 10, pp. 211–219, 2017.

P. R. P. Hoole et al., “An Electromagnetic Signal Processor for Beam-forming a Wireless Mobile Sensor Station: Strengthening the Desired Signal and Nulling Main Interference,” International Journal of control Theory and Applications, vol. 10, pp. 203–209, 2017.

J. Fisher, P. Hoole, K. Pirapaharan, and S. Hoole, “Pre-Lightning Strikes and Aircraft Electrostatics,” MATEC Web of Conferences, vol. 87, pp. 5002–5006, 2017.

T. Khengwee et al., “A Review of Sarawak Off-Grid Renewable Energy Potential and Challenges,” Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, pp. 29–33, 2017.

P. Hoole et al., “Lightning Protection of Aircraft, Power Systems and Houses Containing IT Network Electronics,” Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, pp. 1–7, 2017.

J. Fisher et al., “Observations on the Electrostatic Discharge Threats to Aircraft Body and to Aerospace Electronics,” Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, pp. 95–98, 2017.

K. Senthilkumar et al., “A Review of a Single Neuron Weight Optimization Model for Adaptive Beam Forming,” Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, pp. 35–40, 2017.

K. Pirapaharan et al., “Polygonal Dipole Placements for Efficient, Rotatable, Single Beam Smart Antennas in 5G Aerospace and Ground Wireless Systems,” Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, pp. 13–18, 2017.

K. Pirapaharan and N. Okamoto, “A Multiport Representation of the Step Junction of Two Circular Dielectric Waveguides: Application to a Stepwise Approximation of a Circular Conical Dielectric Waveguide,” in Proc. of OFSET 2000, 2000, pp. 329–332.