ELEKTRICITETSLÄRA

Publications of Vernon Cooray

Books:

V. Cooray (Editor and author of four chapters), The lightning flash, 570 pages, published by the Institute of Electrical and Electronic Engineers, England, 2003.

V. Cooray, Blixt och Åska – Så fungerar naturens fyrverkeri, Hallgren and Fallgren, 2003.

V. Cooray (Editor and author and co author of five chapters), Lightning Protection, Institute of Electrical and Electronic Engineers, England, in Press, date of release: April, 2009.

Other Book Chapters

Cooray, V., Effects of propagation on the electromagnetic fields generated by lightning, Trends in Geophys., vol. 2, 71 - 86, 1993.

Publication 1982

(1) Cooray, V., and S. Lundquist: On the characteristics of some radiation fields from lightning and their possible origin in positive ground flashes, J. Geophys. Res., vol. 87, 11203-11214, 1982.

Publications 1983

(2) Cooray, V., and S. Lundquist: Effects of propagation on the risetime and the initial peaks of  radiation fields from return strokes, Radio Sci., vol. 18, 409-415, 1983.

(3) Cooray, V. : Errors in direction finding due to non vertical lightning channels: Effects of finite ground conductivity,  Radio Sci., vol. 18, 409-415, 1983.

Publications 1984

(4) Cooray, V. : Further characteristics of positive radiation fields from lightning in Sweden, J. Geophys. Res., vol. 89, 11807-11815, 1984.

Publications 1985

(5) Cooray, V., and V.  Scuka,  EMP radiation from lightning and its effects on communication equipment, 18th International Conference on Lightning Protection, Graz, 1985.

(6) Cooray, V., and S. Lundquist: Characteristics of the radiation fields from lightning in Sri Lanka in the tropics, J. Geophys. Res., vol. 90, 6099-6109, 1985.

Publications 1986

(7) Cooray, V., A novel method to identify the radiation fields produced by positive return strokes and their submicrosecond structure, J. Geophys. Res., vol. 91, 7907-7911, 1986.

(8) Cooray, V., Response of CIGRE and CCIR lightning flash counters to field changes from lightning: A theoretical study, J. Geophys. Res., vol. 91, 2835-2842, 1986.

(9) Cooray, V., Temporal behaviour of lightning HF radiation at 3 MHz near the time of first return strokes, J. Atmos. Terr. Phys., vol. 48, 73-78,1986.

(10) Cooray, V., and F. De La Rosa,  Shapes and amplitudes of the initial peaks of lightning induced voltages in power lines over finitely conducting earth: Theory and comparison with experiment, IEEE Trans. Antennas and propagation, vol. AP-34, 88- 92, 1986.

Publications 1987

(11) Cooray, V., Effects of propagation on the return stroke radiation fields, Radio Sci., vol. 22, 757-768, 1987.

Publications 1988

(12) Schutte, T., and V. Cooray: Recalculation of lightning localization system performance using a refined damping model, J. Atmos. and Oceanic Technology, vol. 5, No. 2 , 375-380, 1988.

(13) Cooray, V., R. E. Orville, S. Lundquist, Electric fields from positive return strokes, 8th International Conference on Atmospheric Electricity, Uppsala, 472 - 476, 1988.

Publications 1989

(14) Cooray, V. , V. P. Idone and R. E. Orville, Velocity of a self propagating discharge as a function of current parameters with special attention to dart leaders and return strokes, Proceedings of the International Conference on Lightning and Static Electricity, University of Bath, September, 1989.

(15) Cooray, V., Relationship between the peak return stroke current, return stroke velocity at ground level and the peak radiation field as predicted by the ‘ distributed corona source model’, (abstract) EOS Transactions, vol. 70, 43, 1989. 

(16) Cooray, V., Derivation of return stroke parameters from the electric and magnetic field derivatives, Geophys. Res. Lett., vol. 16, pp. 61 - 64, 1989.

(17) Cooray, V., A Return Stroke Model, Proceedings of the International Conference on Lightning and Static Electricity, University of Bath, September, 1989.

(18) Cooray, V. and R. E. Orville, LORAN-C propagation errors caused by the propagation over finitely conducting ground,  Radio Science, Vol. 24,  179 - 182, 1989.

Publications 1990

(19) Cooray, V., and R. E. Orville, The effects of variation of current amplitude, current risetime and return stroke velocity along the return stroke channel on the electromagnetic fields generated by return strokes,  J. Geophys. Res, vol. 95, No. D11, Oct. 1990.

(20) Cooray, V., Relationship between different return stroke parameters as predicted by a new return stroke model, Proceedings of the 20th International Conference on Lightning Protection, Interlaken, Switzerland , 1990.

(21) Hermosillo, V. and V. Cooray, A worst case study of lightning induced voltages on overhead power lines, Proceedings of the 20th International Conference on Lightning Protection, Interlaken, Switzerland , 1990.

Publications 1991

(22) Cooray, V., Power and energy dissipation in subsequent return strokes as predicted by a new return stroke model, (abstract) EOS Transactions, vol. 71, 23, 1990 (the full paper is  in Proceedings of the International Aerospace and Ground Conference in Lightning and Static Electricity, p 66-1 to 66-6, Florida, 1991.)

(23) Ming, Ye. and V. Cooray, Effects of propagation on the radiation fields from return strokes as they travel across a rough ocean surface, (abstract) EOS Transactions, vol. 72, 44, 1991. 

(24) Windmar, D., V. Cooray and V. Scuka, Optical radiation generated by 280 mm long laboratory sparks, Proceedings of the International Aerospace and Ground Conference on Lightning and Static Electricity,  p 63-1 to 63-8, Florida, April 1991.

(25) Hermosillo, V. F. and V. Cooray, Waveshapes related to lightning induced overvoltages on overhead lines, 4th Summer meeting, Power Chapter, IEEE-Mexico, 1991.

Publications 1992

(26) Perez, H., E. Pisler, V. Cooray, and V. Scuka, Lightning current statistics as compared with the data collected by a lightning localization network, Proceedings of the  21st International Conference on lightning protection, paper 6.11, Berlin, 1992.

(27) Cooray, V., Horizontal fields generated by return strokes, Radio Sci., vol. 27, 529 - 537, 1992.

(28) Cabrera, V. M., and V. Cooray, On the mechanism of space charge generation and neutralization in a coaxial cylindrical configuration in air, J. Electrostatics, vol. 28, 187 - 196, 1992.

(29) Cooray, V., A model for the positive return strokes, Proceedings of the International Aerospace and Ground Conference on Lightning and Static Electricity, p 48-1 to 48-10, Atlantic city, October 1992.

Publications 1993

(30) Cooray, V., Effects of propagation on the electromagnetic fields generated by lightning, Trends in Geophys., vol. 2, 71 - 86, 1993.

(31) Cabrera, V. M.,  S. Lundquist, and V. Cooray, On the physical properties of discharges in sand under lightning impulses, J. Electrostatics, vol. 30, 17 - 27, 1993.

(32) Cabrera, V. M. and V. Cooray, Space charge neutralization of corona envelopes under lightning impulses, Proceedings of the 8th International Symposium on High Voltage Engineering, Yokohama, Japan, 1993.

(33) Cooray, V., A model for the subsequent return strokes,  J. Electrostatics, vol. 30, 343-354, 1993.
 
Publications 1994

(34) Cooray, V., Estimation of peak return stroke currents from measured fields without prior knowledge of the return stroke velocity, International Symposium on Electromagnetic Compatibility (EMC'94 Roma), 740-745,  Rome, 1994.

(35) Ye, M., H. Perez, V.  Cooray,  and V. Scuka, Response characteristic of a low voltage power installation network to the EMP irradiation obtained by an impulse current injection method, International Symposium on Electromagnetic Compatibility (EMC'94 Roma), 543-548,  Rome, 1994.

(36) Perez, H., Y. Ming, G. V. Cooray, and V. Scuka, Response of a low voltage power installation network to the EM-Fields generated by a TEM-Field Simulation Antenna and natural lightning EMP, International Symposium on Electromagnetic Compatibility (EMC'94 Roma), 676-681,  Rome, 1994.

(37) Cooray, G. V.,  A model for first return strokes, 22nd International Conference on Lightning Protection, paper R2-02,  Budapest, 1994.

(38) Cooray, G. V.  and H.  Perez, Propagation effects on the first return stroke radiation fields: Homogeneous paths and mixed two section paths, Propagation effects on return stroke fields, 22nd International Conference on Lightning Protection, paper R1a-06,  Budapest, 1994.

(39) Cooray, G. V., Lightning induced over voltages in power lines: validity of various approximations made in over voltage calculations,  22nd International Conference on Lightning Protection, paper R4-04,  Budapest, 1994.

(40) Ye, M., and G. V. Cooray, Electromagnetic radiation fields generated by lightning return strokes over stratified ground, 22nd International Conference on Lightning Protection, paper R1c-05,  Budapest, 1994.

(41) Nucci, C. A., F. Rachidi, M. Ianoz, V. Cooray, and C. Mazzetti, Coupling models for lightning-induced over voltage calculations: A comparison and consolidation, 22nd International Conference on Lightning Protection, paper R3b-06,  Budapest, 1994.

(42) Cooray, V., Calculating lightning-induced over voltages in power lines: A comparison of two coupling models,  IEEE Transactions (EMC), vol. 36, 179 - 182, 1994.

(43) Ye, M. and V. Cooray, Propagation effects caused by a rough ocean surface on the electromagnetic fields generated by lightning return strokes, Radio Sci., vol. 29, 73 - 85, 1994.

(44) Cooray, V., and Y.  Ming,  Propagation effects on the lightning generated electromagnetic fields for homogeneous and mixed sea land paths, J. Geophys. Res., vol. 99, 10641 - 10652, 1994.

(45) Cooray, V., and H. Perez, Some features of lightning flashes observed in Sweden, J. Geophys. Res., vol. 99, 10683-10688, 1994.

(46) Cooray, V., and H. Perez,  HF radiation at 3 MHz associated with positive and negative return strokes, J. Geophys. Res., vol. 99, 10633-10640, 1994.

(47) Cooray, V.,  and K. P. S. C. Jayaratne, Characteristics of lightning flashes observed in Sri Lanka in the tropics, J. Geophys. Res., vol. 99, 21015 - 21056, 1994..

(48) Jayaratne, K. P. S. C., and V. Cooray, The lightning HF radiation at 3 MHz during leader and return stroke processes, J. Atmos. Terres. Phys., vol. 56, 493 - 501, 1994.

Publications 1995

(49) Hermosillo, V. F. and  V.  Cooray,  Calculation of fault rates of overhead power distribution lines due to lightning induced voltages including the effects of ground conductivity, Transactions of IEEE (EMC), vol. 37, 392 - 398, 1995

(50) Cooray, V., Variation of return stroke velocity over the first few hundred meters and its relationship to the slow front in return stroke radiation fields, Inst. Phys. Conf. Ser. No 143, pp. 235 - 240, 1995.

(51) Cooray, V., A model for positive return strokes, Inst. Phys. Conf. Ser. No 143, pp. 363 - 371, 1995.

(52) Roman, F., V. Cooray, and V. Scuka, The corona onset voltage as a function of the radius of curvature of floating electrodes, proc. 11th International Conference on gas discharges and their applications, pp. 192 - 195, Tokyo, Japan, 1995.

(53) Larsson, A., H. Tang, V. Scuka, and V. Cooray, The breakdown mechanism of mid-plane triggered spark gap trigatron, proc. 11th International Conference on gas discharges and their applications, pp. 134 - 141, Tokyo, Japan, 1995.

Publications 1996

(54) Cooray, V., R. Jayaratne and V. Scuka, What attracts a lightning flash to ground, Proceedings of the International Conference on Atmospheric Electricity, pp. 256 - 259, Osaka, Japan, 1996.

(55) Cooray, V., A Model for dart leaders in lightning flashes, J. Atmos. Elec., vol. 16, pp. 145 - 159, 1996.

(56) Cooray, V., Possible influence on the mechanism of return stroke initiation on the remote sensing of lightning current parameters through first return stroke radiation fields, J. Atmos. Elec., vol. 16, pp. 133 - 144, 1996..

(57) Roman, F., V. Cooray, and V. Scuka, Corona from floating electrodes, J. Electrostatics, vol. 37, pp. 67 - 78, 1996.

(58) Larsson, A. and V. Cooray, Charge distribution in the lightning leader channel, Proc. 23rd International Conference on Lightning Protection, pp. 56 - 60, Italy, 1996.

(59) Hermosillo, V., and V.  Cooray,  Space charge generation and neutralization in a coaxial cylindrical configuration in air under a negative voltage impulse, J. Electrostatics, vol. 37, pp. 139 - 149, 1996.

(60) Roman, F., V. Cooray, and V. Scuka, Breakdown characteristics of rod-to-plane arrangements with floating electrodes on the high voltage side, NORD-IS 96, pp. 355 - 362, 1996.

(61) Silfverskiöld, S., R. Thottappillil, M. Ye, V. Cooray, and V. Scuka, Induced voltage in a low voltage power installation network due to lightning electromagnetic fields, Proc. 23rd International Conference on Lightning Protection, pp. 334 - 339, Italy, 1996.

(62) Roman, F., V. Cooray, and V. Scuka, Assessment of the electrical breakdown probability of floating rods in a lightning protection system, RVK 96, Kiruna, Sweden, 1996.

(63) Cooray, V., An overview of the interaction of lightning generated electromagnetic fields with power lines, XXVth General Assembly of the International Union of Radio Science, Abstracts, pp. 250, 1996.

Publications 1997

(64) Kawasaki, Z., and V.  Cooray, Rocket triggered lightning, 12th International Symposium on electromagnetic compatibility, pp. 387 - 390 (supplement), 1997.

(65) Roman, F., V. Cooray, and V. Scuka, The principle of operation of a simple electrostatic field measuring device based on the properties of floating electrodes,  J. Electrostatics, vol. 40&41, pp. 483 - 488, 1997.

(66) Cooray, V., Electric Field at the discharge tip couples the speed and currents of dart leaders, return strokes and M-components, J. Electrostatics, vol. 40&41, pp. 85 - 90, 1997.

(67) Fernando, M. and V. Cooray, The peak, risetime  and the half-width of lightning generated electric field derivatives over finitely conducting ground, Proceedings of The 10th International Conference on Electromagnetic Compatibility, University of Warwik, UK, 1997.

(68) Galvan, A., and V. Cooray, Analysis of lightning induced voltages in a net-work of conductors using the ATP-EMTP program, Proceedings of The 10th International Conference on Electromagnetic Compatibility, University of Warwik, UK, 1997.

(69) Cooray,  V., A lightning return stroke model with leader charge distribution and channel base current as the only input parameters, Proc. International Conference on Lightning and  Mountains, Chamonix Mont Blank, France, 1997.

(70) Cooray,  V., Recently introduced return stroke models predict the presence of two current fronts at the initiation of natural return strokes, Proc. International Conference on Lightning and  Mountains, Chamonix Mont Blank, France, 1997.

(71) Gomes, C., and V. Cooray, Return stroke models: The concepts, Chamonix, Mont Blank, France, 1997.

(72) Galvan, A., V. Cooray and V. Scuka, Measurement of the voltage induced in an artificial low voltage power installation from both cloud and ground flashes, Chamonix Mont Blank, France, 1997.

(73) Roman, F., V. Cooray, and V. Scuka, A single stress method to study the physical properties of discharge processes in air, Proc. 10th Int. Symp. on High Voltage Engineering, Montreal, Canada, 1997.

(74) Cooray, V., A model for negative first return strokes in negative lightning flashes, Phys. Scripta, vol. 55, pp. 119 - 128, 1997.

(75) Cooray, G. V., Energy dissipation in lightning flashes, J. Geophys. Res., vol. 102, p. 21,401-21,410, 1997.

(76) Gallardo, L., and V. Cooray, Could cloud discharges be as effective as cloud-to-ground discharges in producing NOx, Thellus, vol. 48B, 641-651, 1996.

(77) Cooray, V., Electromagnetic Fields Produced by positive return strokes in the upper atmosphere with specific attention on red sprites (abstract), Proceedings of the Fall meeting of the American Geophysical Union, San Francisco, 1997.

(78) Lan Gao, V. Cooray, R. Thottappillil, and V. Scuka, Study of cathode-directed positive streamers in air by streamer current and luminosity measurements, Proc. Conf. on Insulation and Dielectric Phenomena, Minneapolis, USA, 1997.

Publications 1998

(79) Cooray,  V. and C. Gomes, Estimation of peak return stroke currents, current derivatives and return stroke speed from measured fields, J. Electrostatics, vol. 43, pp. 163 - 172, 1998.

(80) Gomes, C., and V. Cooray, Long impulse currents associated with positive return strokes, J. Atmos. and Terrs. Phy., vol. 60, pp. 693 - 699, 1998.

(81) Gomes, C., V. Cooray, and C. Jayaratne, Comparison of preliminary breakdown pulses in Sweden in the temperate region and that in Sri Lanka in the tropics, J. Atmos. and Terrs. Phys., vol. 60, pp. 975 - 979, 1998.

(82) Gomes, C., and V. Cooray, Correlation between the optical signatures and current wave forms of long sparks: Applications in lightning research, J. Electrostatics, vol. 43, pp. 267 - 274, 1998.

(83) Cooray, V., and V. Scuka, Calculation of Induced voltages in power lines due to lightning-Validity of various approximations,  Trans. IEEE (EMC), vol. 40, pp. 355 – 363, 1998.

(84) Roman, Cooray and Scuka, Comparison of the breakdown of rod-plane gaps with floating electrode, IEEE(dielectrics and insulation coordination), vol. 5, pp. 622 - 624, 1998.

(85) Cooray, V., M. Berg, M. Zitnik, L. Larsson, V. Scuka, Initiation of ground flashes,: Microscopic electrical processes associated with precipitation particles, Proceedings of the International Conference on Lightning Protection, Birmingham, England, 1998.

(86) Cooray, V., Interaction of electromagnetic fields produced by lightning flashes with electrical networks: The influence of propagation effects, Proceedings of the International Conference on Lightning Protection, Birmingham, England, 1998.

(87) Cooray, V., Some considerations on the Cooray-Rubinstein approximation used in deriving the horizontal electric field over finitely conducting ground, Proceedings of the International Conference on Lightning Protection, Birmingham, England, 1998.

(88) Cooray, V., H. Peres, V. Scuka, L. Gallardo, P. Oyola, Production of NOx  and O3 by streamer discharges and its applications in lightning discharges, Proceedings of the International Conference on Lightning Protection, Birmingham, England, 1998.

(89) Cooray, V., M. Fernando, V. Scuka, T. Sorenssen, A. Pedersen, The fine structure of positive return stroke radiation fields - A collaborative study between researchers from Sweden and Denmark, Proceedings of the International Conference on Lightning Protection, Birmingham, England, 1998.

(90) Fernando, M. and V. Cooray, Sub-microsecnd structure of electric field pulses generated by cloud flashes, Proceedings of the International Conference on Lightning Protection, Birmingham, England, 1998.

(91) Gomes, C., V.  Cooray and C. Jayaratne, Chaotic pulse trains associated with negative subsequent return strokes, Proceedings of the International Conference on Lightning Protection, Birmingham, England, 1998.

(92) Galvan, A., V. Cooray, R. Thottappillil, V. Scuka, Effects of electromagnetic pulse radiation from lightning in low voltage power installations, Proceedings of the International Conference on Lightning Protection, Birmingham, England, 1998.

(93) Fernando, M., A. Galvan, T. Götshel, V. Cooray and V. Scuka, Analysis of Swedish lightning data using LLP data, Proceedings of the International Conference on Lightning Protection, Birmingham, England, 1998.

(94)  Enell, C. F., A. Meier, Å. Steen, V. Cooray, T. Wagner, K. Pfeilsticker, U. Platt, and P. Johnston, A discussion on the variability of atmospheric trace gas concentrations and other high latitude phenomena, EGS abstract, Nice, April, 1998.

(95) Gomes, C. and V. Cooray, Radiation field pulses associated with the initiation of positive cloud to ground lightning flashes, Proceedings of the International Conference on Lightning Protection, Birmingham, England, 1998.

(96) Cooray, V., Predicting the spatial and temporal variation of the current, the speed and electromagnetic fields of subsequent return strokes, In Press,  IEEE Transactions on Electromagnetic Compatibility, vol. 40, pp. 427 – 435, 1998.

(97) Larsson, A., V. Cooray, V. Scuka, Advanced simulations of space-charge dominated electrical discharges in air along dielectric surfaces, EMB 98 - Elektromagnetiska beräkningar för analys och design av komplexa system, Linköping, 1998.

Publications 1999

(98) Roman, Cooray and Scuka, Increase in visual corona from floating electrodes, J. Electrostatics,  vol. 45, pp. 243 – 254, 1999.

(99) Lan Gao, Anders Larsson, Vernon Cooray and Viktor Scuka, Simulation of streamer discharges as finitely conducting channels, IEEE (Dielectrics and Insulation), vol. 6, pp. 35 – 42,  1999.

(100) Gomes, C. and V. Cooray, The dependence of the total leader field change and the ratio of that to the total return stroke field change on the orientation of a segment of the leader channel, Proceedings of the 13th International Symposium on Electromagnetic Compatibility, Zurich, 1999.

(101) Galvan, A., and V. Cooray, Lightning induced voltages on bare and insulated buried cables, to be published in the Proceedings of the 13th International Symposium on Electromagnetic Compatibility, Zurich, February, 1999.

(102) Roman, F., V. Cooray and V. Scuka, A comparative study of corona discharges in a coaxial cylinder using electric field impulses generated by electrically floating electrodes,  J. Electrostatics, vol. 47, pp. 99 – 120, 1999.

(103) Gomes, C., L. Gao and V. Cooray, Breakdown characteristics of long sparks over insulating surfaces, Nordic Insulation Symposium, Technical University of Denmark, 1999.

(104) Akyuz, M., L. Gao, A. Larsson, V. Cooray, The streamer current in three-electrode system, Nordic Insulation Symposium, Technical University of Denmark, 1999.

(105) Galvan, A., V. Cooray, and V. Scuka, Signal strength of return strokes occurring over the sea and over land: A sensitivity analysis, to be presented at the International Conference on Atmospheric Electricity, Alabama, 1999.

(106) Cooray, V., Propagation of lightning generated transient electromagnetic fields over finitely conducting ground, to be presented at the International Conference on Atmospheric Electricity, Alabama, 1999.

(107) Galvan, A., V. Cooray and V. Scuka, Interaction of electromagnetic fields from cloud and ground lightning flashes with an artificial low voltage power installation, Electromagnetic Compatibility, IEEE Transactions on , Volume: 41 Issue: 3 ,250 –257, 1999.

(108) Cooray, V., Propagation of lightning generated electromagnetic fields over finitely conducting ground, Proceedings of the 13th International Symposium on Electromagnetic Compatibility (Supplement), pp. 223 – 228, Zurich, , 1999.

(109) Gao, L., M. Akyuz, A. Larsson, V. Cooray and V. Scuka, Measurement of the positive streamer charge,
High Voltage Engineering, 1999. Eleventh International Symposium on High Voltage Engineering (Conf. Publ. No.467) , Volume: 2 , pp. 35 –38, 1999.

(110)Bendjamin, J.; Gomes, C.; Cooray, V. Remote sensing of ESD through optical and magnetic radiation fields, IEEE Transactions on Dielectrics and Electrical Insulation  , Volume: 6 Issue: 6 , pp. 896 – 899, Dec. 1999.

(111) Silfverskiold, S.; Thottappillil, R.; Ye, M.; Cooray, V.; Scuka, V. , Induced voltages in a low-voltage power installation network due to lightning electromagnetic fields: an experimental study , IEEE Transactions on Electromagnetic Compatibility , Volume: 41 Issue: 3 , pp. 265 – 271, Aug. 1999.

(112) Gao, L., Gomes, C.; Cooray, V.; Roman, F. Comparison of long sparks in air and over an insulator surface, Eleventh International Symposium on High Voltage Engineering, 1999 (Conf. Publ. No.467) , pp. 31 – 34, 1999.

(113) Cooray, V. Predicting the spatial and temporal variation of the electromagnetic fields, currents and speeds of first return strokes, Eleventh International Symposium on High Voltage Engineering, 1999 (Conf. Publ. No. 467) , Volume: 2 , pp. 406 – 410, 1999.

(114) Gomes, C.; Cooray, V., On theoretical approaches to estimate the lightning return stroke current parameters, Eleventh International Symposium on High Voltage Engineering, 1999 (Conf. Publ. No. 467) , Volume: 2 , pp. 401 – 405, 1999.

Publications 2000

(115) Cooray, V.: The modelling of positive return strokes in lightning flashes. Journal of Atmospheric and Solar-Terrestrial Physics, vol.  62, pp. 169-187, 2000.

(116) Cooray, V.: Charge and Voltage Characteristics of Corona Discharges in a Coaxial Geometry. IEEE Trans. on Dielectrics and Electrical Insulation, Vol. 7, No. 6, 2000.

(117) Cooray, V. and Jayaratne, R.: What directs a lightning flash towards ground? Sri Lankan Journal of Physics, Vol. 1, pp. 1-10, 2000.

(118) Cooray, V., Fernando, M., Sörensen, T., Götschl, T and Pedersen, A.: Propagation of lightning generated transient electromagnetic fields over finitely conducting ground. Journal of Atmospheric and Solar-Terrestrial Physics, vol.  62, pp. 583-600, 2000.

(119) Gao, L., Akyuz, M., Larsson, A., Cooray, V. and Scuka, V.: Measurement of the positive streamer charge. J. Phys. D: Appl. Phys., vol.  33, pp. 1861-1865, 2000.

(120) Gomes, C. and Cooray, V.: Concepts of Lightning Return Stroke Models. IEEE Trans. on Electromagnetic compatibility, Vol. 42, No. 1, 2000.

(121) Cooray, V. and Galván, A.: The Stepped Leader As A Source of Interference In Electrical Installations. 25th International Conference on Lightning Protection, Rhodos, Greece, September 18-22, 2000.

(122) Cooray, V. and Galván, A.: A Negative First Return Stroke Model For Engineering Applications. 25th International Conference on Lightning Protection, Rhodos, Greece, 2000.

(123) Galván, A. and Cooray, V.: Analytical Simulation of Lightning Induced Voltages in Low Voltage Power Installations. 25th International Conference on Lightning Protection, Rhodos, Greece, 2000.

(124) L. Gao, S. Kröll, A. Larsson and V Cooray, Effect of Absorbed Laser Pulse Energy in Laser Triggered Electrical Breakdown in Air", Proceedings of the 13th International Conference on Gas Discharges and their Applications, Glasgow, UK, Sep. 2000.

(125) Gao, L.; Larsson, A.; Cooray, V. Simulation of streamer discharges as finitely conducting channels [comments and reply] , IEEE Transactions on Dielectrics and Electrical Insulation [see also Electrical , Volume: 7 Issue: 3 , pp. 458 – 460, June 2000.

Publications 2001

(126) Akyuz, M; Cooray, V, The Franklin lightning conductor: Conditions necessary for the initiation of a connecting leader,  Journal of Electrostatics,  vol. (51-52), pp.  319-325, 2001

(127) Akyuz, M; Gao, L; Larsson, A; Cooray, V, Streamer current in a three-electrode system,  IEEE Transactions on Dielectrics and Electrical Insulation, vol  4 , pp. 665-672, 2001.
 
(128) Akyuz, M; Gao, L; Larsson, A; Cooray, V; Gustavsson, TG; Gubanski, SM, Positive Streamer Discharges along Insulating Surfaces,  IEEE Transactions on Dielectrics and Electrical Insulation, vol. 6, pp. 902-910, 2001.
 
(129) Cooray, V, Underground electric fields generated by the return strokes of lightning flashes, IEEE Transactions on Electromagnetic Compatibility, vol. 43, pp.  75-84, 2001.

(130) Galván, A; Cooray, V; Thottappillil, R, A technique for the evaluation of lightning-induced voltages in complex low-voltage power-installation networks,  IEEE Transactions on Electromagnetic Compatibility, vol. 43,  pp. 402-409, 2001.

(131) Rehbein, N; Cooray, V, NOx production in spark and corona discharges, Journal of Electrostatics, vol. (51-52) , pp. 333-339, 2001.

(132) Gubanski, S.M.; Gedde, U.W.; Cooray, V.; Kroll, S. Swedish research program on high performance outdoor electrical insulation, Proceedings of the Symposium on International Electrical Insulating Materials, , (ISEIM 2001), pp 41 – 46, 2001.

Publications 2002

(133) Rahman, M; Cooray, V,  NOx generation in laser-produced plasma as a function of dissipated energy,  26th International Conference on Lightning Protection, Cracow, Poland  2002

(134) Cooray, V; Montano, R; Theethayi, N; Zitnik, M; Manyahi, M; Scuka, V,  A channel base current model to represent both negative and positive first return strokes with connecting leaders, Proceedings of the 26th International Conference on Lightning Protection,  pp. 36 – 41, Cracow, Poland  2002.

(135) Cooray, V; Zitnik, M; Manyahi, M; Montano, R; Rahman, M; Liu, Y,  Physical model of surge-current characteristics of buried vertical rods in the presence of soil ionisation,  Proceedings of the 26th International Conference on Lightning Protection, pp. 357 – 362,  Cracow, Poland  2002.

(136) Cooray, V; Zitnik, M; Strandberg, G; Rahman, M; Montano, R; Scuka, V,  A novel modification of the transmission line model of lightning return strokes. Proceedings of the 26th International Conference on Lightning Protection, pp. 50 – 55,  Cracow, Poland  2002.

(137) Cooray, V., Some Considerations on the ‘Cooray-Rubinstein’ Formulation Used in Deriving the Horizontal Electric Field of Lightning Return Strokes Over Finitely Conducting Ground, Proc. IEEE(EMC), vol. 44, pp. 560 - 566 , 2002.

Pulbications 2003

(138) Cooray, V. On the concepts used in return stroke models applied in engineering practice, Trans. IEEE (EMC), vol. 45, pp. 101 – 108, 2003.

(139) Cooray, V., Author’a reply to comments on ‘On the On the concepts used in return stroke models applied in engineering practice’, IEEE Transactions on EMC, vol. 45, 2003.

(140) Rahman, M., and V. Cooray, "NOx generation in laser-produced plasma in air as a function of dissipated energy", Optics and Laser Technology, vol. 35, No. 7, p. 543 – 546, 2003.

(141)  Akyuz, M., A. Larsson, V. Cooray and G. Strandberg, 3D simulation of streamer branching in air, the J. Electrostatics, vol. 59, 115 – 141, 2003.
 
(142)  Theethayi, N. and V. Cooray,  The transmission line model – idealisation and reality, Proceeding of the IEEE power technical conference, Bolognia, Italy, 2003.

(143) Roman, F., R. Montaño and V. Cooray, Varistor response under subsequent stroke-like impulse current, International Symposium on High Voltage Engineering, Netherlands, 2003.

(144) Roman, F.R. Montaño and V. Cooray, Response of low voltage protective devices under subsequent stroke-like impulse currents, International Symposium on High Voltage Engineering, Netherlands, 2003.

(145) Theethayi, N., Y. Liu, R. Montano, R. Thottappillil, M. Zitnik, V. Cooray and V. Scuka, Modeling direct lightning attachment to electrified railway system in Sweden, Power Tech Conference Proceedings, IEEE Bologna, Volume 4,  pp. 23-26 June 2003.  

Publications 2004

(146) Cooray, V., M. Fernando, C. Gomes, T. Sorensen, The Fine Structure of Positive Return Stroke Radiation Fields, IEEE Transactions on EMC, vol. 46, 87 – 95, 2004.

(147) Cooray, V., R. Montano and V. Rakov, A model to represent first return strokes with connecting leaders,  J. Electrostatics, vol. 40, 97 – 109,  2004.

(148) Cooray, V., M. Zitnik, M. Rahman, M. Manyahi and Y. Liu, Physical model of surge current characteristics of buried vertical rods in the presence of soil ionisation, J. Electrostatics, vol. 60, 193 – 202, 2004.

(149) Cooray, V. and N. Theethayi, The striking distance and the ESE principle, Proc. International Conference on Lightning Protection, Avignon, France, 2004.

(150) Cooray, C., V. Cooray and C. Andrews, A review of the interaction of lightning and thunderstorms with humans, Proc. International Conference on Lightning Protection , Avignon, France, 2004.

(151) Montano, R, M. Edirisinghe, and V. Cooray, Varistors and gas discharge tube models – a comparison between theory and practice, Proc. International Conference on Lightning Protection, Avignon, France, 2004.

(152) Cooray, V. and M. Zitnik, On attempts to protect a structure from lightning strikes by enhanced space charge generation, Proc. International Conference on Lightning Protection, Avignon, France, 2004.

(153) Theethayi, N. and V. Cooray, Representation of the return stroke as a transmission line – the apparent return stroke velocity, Proc. International Conference on Lightning Protection, Avignon, France, 2004.

(154) Sonnadara, U., V. Cooray, and M. Fernando, Lightning radiation field spectra of cloud flashes, Proc. International Conference on Lightning Protection, Avignon, France, 2004.

(155) Gomes, C. and V. Cooray,  Radiation field pulses associated with the initiation of positive cloud to ground lightning flashes, J. Atmos. Terr. Phys., vol.  66, 1047 – 1055, 2004.

(156) Gomes, C, V. Cooray, R. Montano, and U. Sonnadara,  Characteristics of chaotic pulse trains generated by lightning flashes, Journal of Atmospheric and Solar-Terrestrial Physics, Volume 66, Issue 18,pp. 1733-1743, December 2004.

(157) Fredrik Huss, Ulf Erlandsson, Vernon Cooray, Gunnar Kratz, Folke Sjöberg,  Blixtolyckor – mix av elektriskt, termiskt och multipelt trauma, Läkartidningen, vol. 101, 23-28,2004.

Publications 2005

(158) Akyuz, M., Cortet, and V. Cooray, Positive streamer discharges along liquid dielectric surfaces, Transactions of IEEE (dielectric and insulation), Volume 12,  Issue 3,  pp. 579 – 585, 2005.

(159) Theethayi, N. and V. Cooray, On the Representation of the Lightning Return Stroke Process as a Current Pulse Propagating Along a Transmission Line,  IEEE Trans. on power delivery, vol. 20, no. 2, pp. 823 -837, 2005.
(160) Theethayi, N. Y.Liu, R. Montano, R. Thottappillil, M. Zitnik, V. Cooray, V. Scuka, A Study on the Consequence of a Direct Lightning Strike to Electrified Railway System in Sweden, Electric Power Systems Research, Volume 74, Issue 2, Pages 267-280, 2005.
 
(161) Akyuz, M., M. Rahman, A. Larsson, V. Cooray, A. Franke, Characteristics of laser-triggered electric discharges in air, Volume 12,  Issue 5, Page(s):1060 – 1070, 2005.

(162) Cooray, V. and M. Rahman, Efficiencies for production of NOx and O3 by streamer discharges in air at atmospheric pressure, J. Electrostatics, vol. 63, pp. 977 – 983, 2005.

(163) Liyanage, P. and V. Cooray, Correlation between current waveforms of electrostatic discharges and optical signatures for several selected wavelengths, J. Electrostatics, vol. 63, pp. 627-633,  2005.

 (164) Cooray, V., On the connection between the corona emission from the return stroke channel, return stroke speed and the current generation type return stroke models, VIII International Symposium on Lightning Protection, Invited Paper, Brazil, 2005.

(165) Cooray, V. On the validity of different approximate procedures used in quantifying the propagation effects on lightning generated electromagnetic fields, VIII International Symposium on Lightning Protection, Brazil, 2005.

(166) Becerra,M. V. Cooray  and H. Abidin, Location of vulnerable points to be struck by lightning in complex structures, International Conference on Lightning and Static Electricity, Seattle, Washington, 2005.

(167) Gomes and Cooray, The temporal characteristics of leader fields at ground level when a part of the lightning channel is inclined, International Symposium on EMC, Zurich, 2005.

(168) Montano, R., M. Edirisinghe, M. Fernando and V. Cooray, Transient response of DC converter stations subjected to lightning induced over voltages, VIII International Symposium on Lightning Protection, Brazil, 2005.

(169) Becerra, M. and V. Cooray, A simplified model to represent the inception of upward leaders from grounded structures under the influence of lightning stepped leaders, VIII International Symposium on Lightning Protection, Brazil, 2005.

(170) Pavenello, D., V. Cooray, F. Rachidi, M. Rubinstein, A. Negodyaev, M. Paolone and C. A. Nucci, Propagation effects on the lightning electromagnetic fields radiated by lightning striking tall structures, VIII International Symposium on Lightning Protection, Brazil, 2005.

(171) Cooray, V., and M. Rahman, On the relationship between the discharge current, energy dissipation and the NOx production in spark discharges, International Conference on Lightning and static Electricity, Seattle, USA, 2005.

Publications 2006

172) M. Becerra, V. Cooray, A simplified physical model to determine the lightning upward connecting leader inception, Trans. IEEE Power Delivery, vol. 20, no. 2, April, 2006.

173) M. Becerra, V. Cooray, Dynamic Modeling of the Lightning Upward Connecting Leader Inception, Proceedings of the 28th International Conference on Lightning Protection, ICLP 2006, Kanazawa, Japan, 2006

174) M. Becerra, V. Cooray, F. Roman, Striking Distance of Vulnerable Points to be struck by Lightning in Complex Structures, Proceedings of the 28th International Conference on Lightning Protection, ICLP 2006, Kanazawa, Japan, 2006.

175) Cooray, V. and V. Rakov,  A current generation type return stroke model that predicts the return stroke velocity, Proceedings of the 28th International Conference on Lightning Protection, ICLP 2006, Kanazawa, Japan, 2006

176) Cooray, V., M. Becerra and V. Rakov, O n the Electric Field at the Tip of Dart Leaders in Lightning Flashes, Proceedings of the 28th International Conference on Lightning Protection, ICLP 2006, Kanazawa, Japan, 2006.

177) Cooray, V., G. Diendorfer, C. A. Nucci, D. Pavanello, M. Becerra, F. Rachidi, M. Rubinstein,  On the Effect of the Finite Ground Conductivity on Electromagnetic Field Radiated by Lightning to Tall Towers, Proceedings of  the 28th International Conference on Lightning Protection, ICLP 2006, Kanazawa, Japan, 2006.

178) Rahman, M., V. Cooray, G. Possnert and J. Nyberg, An experimental quantification of the NOX production efficiency of energetic alpha particles in air, Journal of Atmospheric and Solar-Terrestrial Physics, Volume 68, Issue 11, Pages 1215-1218, July 2006.
 
179) Sonnadara, U., V. Cooray and M. Fernando, The Lightning Radiation Field Spectra of Cloud Flashes in the Interval from 20 kHz to 20 MHz, Proceedings of  IEEE (EMC), vol. 48, No. 1, pp. 234 – 239, 2006.
 
180) Becerra, M. and V. Cooray, A self consistent upward leader propagation model, J. Phys.D: Appl. Phys. 39, pp. 3708-3715, 2006.

181) Montano, R, M. Becerra, V. Cooray, M. Rahman, and P. Liyanage, Resistance of spark channels, IEEE Transactions on Plasma Science, vol. 34, No. 5, pp. 1610-1619, 2006.

182) Becerra, M.; Cooray, V., Time dependent evaluation of the lightning upward connecting leader inception,  J. Phys. D: Appl. Phys. 39, pp. 4695-4702, 2006.

183) Sonnadara, U., V. Cooray and T. Götschl, Characteristics of cloud to ground flashes in Sweden, Phys. Scr., vol. 74, pp. 541 – 548, 2006.

Publications 2007

184) Cooray, V., M. Becerra and M. Rahman, On the NOx production in cold electrical discharges, Proc. International Conference on Atmospheric Electricity, Beijing, 2007.

185) Cooray, V., M. Rahman and V. Rakov, NOx production in lightning flashes, Proc. International Conference on Atmospheric Electricity, Beijing, 2007.

186) Cooray, V., Carlo Alberto Nucci and Farhad Rachidi, Guest editorial, Journal of Electrostatics, Volume 65, Issues 5-6, Page 281, May 2007.

187) Cooray, V.,  C. Cooray and C.J. Andrews, Lightning caused injuries in humans,  Journal of Electrostatics, Volume 65, Issues 5-6, Pages 386 - 394, May 2007.

188) Cooray, V. and V. Rakov, A current generation type return stroke model that predicts the return stroke velocity, J. Lightning Res., vol. 1, Pages 32 - 39, 2007.

189) Cooray, V., V. Rakov and N. Theethayi, The lightning striking distance—Revisited, Journal of Electrostatics,Vol. 65, pp. 296–306, 2007.

190) Cooray, V. and N. Theethayi, The striking distance of lightning flashes and the early streamer emission (ESE) hypothesis, Journal of Electrostatics,Vol. 65, pp. 336–341, 2007.

191) Becerra, M, V. Cooray and Z. A. Haratono, Identification of lightning vulnerability points on complex grounded structures, Accepted for publication in J. Electrostatics,  vol. 65, pp. 562 – 570, 2007.

192) Mäkelä, J. S.,  M. Edirisinghe, M. Fernando, R. Montaño and V. Cooray, HF radiation emitted by chaotic leader processes, Journal of Atmospheric and Solar-Terrestrial Physics, Volume 69, Issue 6, Pages 707-720, 2007.

193) Dulan Amarasinghe, Upul Sonnadara, Marcus Berg and Vernon Cooray, Channel tortuosity of long laboratory sparks, Journal of Electrostatics, Volume 65, Issue 8, Pages 521-526, 2007.

194) Fernando, M. and V. Cooray, Propagation effects on the electric field time derivatives generated by return strokes in lightning flashes, Journal of Atmospheric and Solar-Terrestrial Physics, Volume 69, Issue 12, Pages 1388-1396, 2007.

195) Cooray, V., Propagation effects on radiation field pulses generated by cloud lightning flashes
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 69, Issue 12, Pages 1397-1406, 2007.

196) Becerra, M., V. Cooray, S. Soula and S. Chauzy, Effect of the space charge layer created by corona at ground level on the inception of upward leaders from tall towers, J. Geophys. Res., vol. 112, D12205, doi:10.1029/2006JD008308.

197) Cooray, V. and M. Becerra, Engineering Return Stroke Models – Recent Developments, Proceedings of the IX International Symposium on Lightning Protection, SIPDA, Iguacu, Brazil, 2007.

198) Cooray, V., Lightning generated magnetic fields over finitely conducting ground, Proceedings of the the IX International Symposium on Lightning Protection, SIPDA, Iguacu, Brazil, 2007.

199) Becerra, M. and V. Cooray,  Laboratory experiments cannot be utilized to justify the action of early streamer emission terminals, Proceedings of the  IX International Symposium on Lightning Protection, SIPDA, Iguacu, Brazil, 2007.

200) Dulan Amarasinghe, Upul Sonnadara, Marcus Berg and Vernon Cooray, Correlation between Brightness and Channel Currents of Electrical Discharges, IEEE Transactions on Dielectrics and Insulation, Volume 14,  Issue 5, Page(s):1154 – 1160, 2007  (Digital Object Identifier 10.1109/TDEI.2007.4339475)
 
201) Cooray, V., Carlo Alberto Nucci, Farhad Rachidi, Guest editorial, Journal of Electrostatics, Volume 65, Issues 5-6, Page 281, 2007

Publications 2008

202) S.R. Sharma, M. Fernando, V. Cooray, Narrow positive bipolar radiation from lightning observed in Sri Lanka, Journal of Atmospheric and Solar-Terrestrial Physics, Volume 70, Issue 10, Pages 1251-1260, 2008
 
202) S.R. Sharma, V. Cooray, M. Fernando, Isolated breakdown activity in Swedish lightning
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 70, Issues 8-9, Pages 1213-1221, 2008.

203) Rahman, M. and V. Cooray A study of NOX production in air heated by laser discharges: Effect of energy, wavelength, multiple discharges and pressure, Optics & Laser Technology, Volume 40, Issue 1, Pages 208-214, 2008.

204) Cooray, V. and N. Theethayi, Pulse Propagation Along Transmission Lines in the Presence of Corona and Their Implication to Lightning Return Strokes, Antennas and Propagation, IEEE Transactions on
Volume 56,  Issue 7, Pages 1948 – 1959, Digital Object Identifier 10.1109/TAP.2008.924678, 2008.

205) Cooray, V., On the Accuracy of Several Approximate Theories Used in Quantifying the Propagation Effects on Lightning Generated Electromagnetic Fields, Antennas and Propagation, IEEE Transactions on
Volume 56,  Issue 7,  Page(s):1960 – 1967, Digital Object Identifier 10.1109/TAP.2008.924680, 2008.

206) Cooray, V., M. Becerra and M. Rahman, On the NOx generation in corona, streamer and low pressure electrical discharges, Open Atmospheric Science Journal, vol. 2, pp. 176 – 180, 2008.

207) Cooray, G. and V. Cooray,  Could some ball lightning observations be optical hallucinations caused by epileptic seizures, Open Atmospheric Science Journal, vol. 2, pp. 101 – 105, 2008.

208) Becerra, M. and V. Cooray, On the velocity of positive connecting leaders associated with negative downward lightning leaders, Geophys. Res. Lett., vol. 35, L02801, doi:10.1029/2007GL032506, 2008.

209) Becerra, M. and V. Cooray, Lightning striking distance of complex structures, IET Generation, Transmission & Distribution, vol. 2, Issue 1, pp. 131 – 138, 2008.

210) Becerra, M. and V. Cooray, Laboratory experiments cannot be utilized to justify the action of Earley Streamer Emission terminals, Journal of Physics D: Applied Physics, vol 41, No. 8, 2008.

211) Rahman, M., V. Cooray, N. A. Ahmed, J. Nyberg, V. A. Rakov and S. Sharma, X rays from 80-cm long sparks in air,  Geophys. Ress. Lett., vol. 35, L06805, doi:10.1029/2007GL032678, 2008.

212) Mäkelä, J. S., N. Porjo, A. Mäkelä, T. Tuomi, and V. Cooray, Properties of preliminary breakdown processes in Scandinavian lightning, Journal of Atmospheric and Solar-Terrestrial Physics, Volume 70, Issue 16, Pages 2041-2052,  December 2008,

213) Montano, R.,N. Theethayi,, V.  Cooray,  An efficient Implementation of the Agrawal Model for Lightning-Induced Voltage Calculations Using Circuit Simulation Software IEEE Transactions on Circuits and Systems Volume 55,  Issue 9, Page(s):2959 – 2965  Oct. 2008.

214) Diaz, Oscar; V. Cooray, F. Roman, Spark gap resistance for an electrostatic discharge at different pressures 2008 IEEE International Conference on Plasma Science, 2008 (ICOPS), Plasma Science, Page(s):1 – 1,  15-19 June 2008 (Digital Object Identifier 10.1109/PLASMA.2008.4590939)

215) Cooray, V., A novel procedure to represent lightning strokes – current dissipation return stroke models, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

216) Mäkelä, J.S., N. Porjo, A. Mäkelä, T. Tuomi and V. Cooray, Evidence against naturally occurring bipolar lightning flashes, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008

217) Fernando M. and V. Cooray, Narrowband radiation associated with lightning ground and cloud flashes: A review, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

218) Arevalo L., V. Cooray, R. Montano and F. Roman, Breakdown effect on long gaps under switching impulses statistical variation, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

219) Liyanage P., Raul Montano and Vernon Cooray, Correlation between current and monochromatic optical signatures of electrical discharges, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

220) Perera, C., M. Fernando, P. Liyanage and V. Cooray, Unusual slow development of cloud-to-air discharges observed in Sri Lanka in the tropic, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

221) Jeyanthiran, V., M. Edirisinghe, M. Fernando and V. Cooray, HF radiation pertinent to cloud flashes observed in Swedish thunderstorms, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

222) Jeyanthiran,  V., M. Edirisinghe, M. Fernando, C. Gomes and V. Cooray, HF radiation at 3 MHz, 5 MHz and 10 MHz associate with preliminary breakdown pulses observed in Sri Lanka, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

223) Mäkelä,  J. S., N.Porjo, J. Jantunen, T. Tuomi, A. Mäkelä, V. Cooray, A., Hämäläine and T. Ahola, Using ratio between breakdown and return stroke intensity for narrowband flash distance estimation, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

224) Perera, C., M. Fernando, P. Liyanage, M. Rahman and V. Cooray, Correlation between current and channel diameter of long laboratory sparks, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

225) De Conti A., Silvério Visacro, Nelson Theethayi and Vernon Cooray, Simulation of the time-varying channel resistance: exponential decay versus strong-shock approximation, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

226) Cooray V., and Mahendra Fernando, Effects of branches, charge irregularities and tortuosity of the stepped leader channel on the current, electromagnetic fields and hf radiation of return strokes, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

227) Jeyanthiran V., M. Edirisinghe, M. Fernanado and V. Cooray, Study of lightning activity over Sri Lanka, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

228) Cooray V., Horizontal electric field at ground level in the vicinity of lightning return stroke channels evaluated using Sommerfeld’s integrals, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

229) Becerra M., Francisco Roman and Vernon Cooray, Lightning attachment to common structures: is the rolling sphere method really adequate?, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

230) Becerra M., Vernon Cooray, Acácio Silva Neto and Alexandre Piantini, Lightning attachment to power transmission lines –on the validity of the electrogeometric model, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

231) Bodika J. A. P., M. Fernanado, V. Cooray and W. G. D. Dharmaratna, A comparison of thunder signatures between cloud and ground flashes associated with audio frequency pressure variations over Sri Lanka, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

232) Mahbubur Rahman, Vernon Cooray, Raúl Montaño, Prasanna Liyanage and Marley Becerra, NOX production in laboratory discharges, 29th International Conference on Lightning Protection, Uppsala, Sweden, 2008.

233) Arevalo, L., R. Montano and V. Cooray, Modelling of Positive Discharges in Laboratory Gaps under Switching impulses, XVII International Conference on Gas Discharges and Their applications. Cardiff, UK, 2008.

235) Arevalo, L., V. Cooray and R. Montano, Breakdown times and voltages probability calculation using a simplified numerical methodology, International Conference on Grounding and Earthing and 3rd International Conference on Lightning Physics and Effects,  Florianopolis Brazil, 2008.

235) Becerra, M. and V. Cooray, On the physics of the interaction of aborted lightning upward connecting leaders with humans, International Conference on Grounding and Earthing and 3rd International Conference on Lightning Physics and Effects,  Florianopolis Brazil, 2008.