Pasan Hettiarachchi

Development and performance of a sleep estimation algorithm using a single accelerometer placed on the thigh: an evaluation against polysomnography

Johansson, Peter; Crowley, Patrick; Axelsson, John; Franklin, Karl et al.

Part of Journal of Sleep Research, 2023

• DOI for Development and performance of a sleep estimation algorithm using a single accelerometer placed on the thigh: an evaluation against polysomnography
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The Surveillance of Physical Activity, Sedentary Behavior, and Sleep: Protocol for the Development and Feasibility Evaluation of a Novel Measurement System

Crowley, Patrick; Ikeda, Erika; Islam, Sheikh Mohammed Shariful; Kildedal, Rasmus et al.

Part of JMIR Research Protocols, 2022

• DOI for The Surveillance of Physical Activity, Sedentary Behavior, and Sleep: Protocol for the Development and Feasibility Evaluation of a Novel Measurement System
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Attachment process of the discharge of competing grounded electrodes - Experimental observations and modeling

Arevalo, Liliana; Lobato, André; Cooray, Vernon; Hettiarachchi, Pasan et al.

Part of 2021 35th International Conference on Lightning Protection (ICLP) and XVI International Symposium On Lightning Protection (SIPDA), 2021

• DOI for Attachment process of the discharge of competing grounded electrodes - Experimental observations and modeling

Frequency spectra of various events pertinent to lightning cloud flashes obtained from wavelet transform technique and ratified by narrow band measurement technique

Sharma, S. R.; Ismail, Mohd Muzafar; Hettiarachchi, Pasan; Cooray, Vernon et al.

Part of Journal of Atmospheric and Solar-Terrestrial Physics, 2021

• DOI for Frequency spectra of various events pertinent to lightning cloud flashes obtained from wavelet transform technique and ratified by narrow band measurement technique

Observations of X-rays in 4-meters long laboratory sparks under positive lightning impulse

Wooi, Chin-Leong; Hettiarachchi, Pasan; Rahman, Mahbubur; Cooray, Vernon et al.

Part of 2021 35TH INTERNATIONAL CONFERENCE ON LIGHTNING PROTECTION (ICLP) AND XVI INTERNATIONAL SYMPOSIUM ON LIGHTNING PROTECTION (SIPDA), 2021

• DOI for Observations of X-rays in 4-meters long laboratory sparks under positive lightning impulse

Validity of a Non-Proprietary Algorithm for Identifying Lying Down Using Raw Data from Thigh-Worn Triaxial Accelerometers

Hettiarachchi, Pasan; Aili, Katarina; Holtermann, Andreas; Stamatakis, Emmanuel et al.

Part of Sensors, 2021

• DOI for Validity of a Non-Proprietary Algorithm for Identifying Lying Down Using Raw Data from Thigh-Worn Triaxial Accelerometers
• Download full text (pdf) of Validity of a Non-Proprietary Algorithm for Identifying Lying Down Using Raw Data from Thigh-Worn Triaxial Accelerometers

Observations of X-rays from Laboratory Sparks in Air at Atmospheric Pressure under Negative Switching Impulse Voltages

Rahman, Mahbubur; Hettiarachchi, Pasan; Cooray, Vernon; Dwyer, Joseph et al.

Part of Atmosphere, 2019

• DOI for Observations of X-rays from Laboratory Sparks in Air at Atmospheric Pressure under Negative Switching Impulse Voltages
• Download full text (pdf) of Observations of X-rays from Laboratory Sparks in Air at Atmospheric Pressure under Negative Switching Impulse Voltages

High-Speed Video Observation of a Dart Leader Producing X-rays

Saba, M. M. F.; Ferro, M. A. S.; Cuactros, E. T.; Custodio, D. M. et al.

Part of Journal of Geophysical Research - Space Physics, p. 10564-10570, 2019

• DOI for High-Speed Video Observation of a Dart Leader Producing X-rays
• Download full text (pdf) of High-Speed Video Observation of a Dart Leader Producing X-rays

Time Domain Analysis of the Lightning Interaction with Wave Energy Converters

Hettiarachchi, Pasan; Lobato, André; Cooray, Vernon; Leijon, Mats

Part of 2018 34th international conference on lightning protection (ICLP 2018), 2018

The leader propagation velocity in long air gaps

Arevalo, Liliana; Wu, Dong; Hettiarachchi, Pasan; Cooray, Vernon et al.

Part of 2018 34th international conference on lightning protection (ICLP 2018), 2018

• DOI for The leader propagation velocity in long air gaps

Measurements of X-Ray Emission from Laboratory Sparks and Upward Initiated Lightning

Hettiarachchi, Pasan

2018

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X-ray observations at Gaisberg Tower

Hettiarachchi, Pasan; Cooray, Vernon; Diendorfer, Gerhard; Pichler, Hannes et al.

Part of Atmosphere, 2018

• DOI for X-ray observations at Gaisberg Tower
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Energy Distribution of X-rays Produced by Meter-long Negative Discharges in Air

Hettiarachchi, Pasan; Cooray, Vernon; Rahman, Mahbubur; Dwyer, Joseph

Part of Atmosphere, 2017

• DOI for Energy Distribution of X-rays Produced by Meter-long Negative Discharges in Air

X-rays from negative laboratory sparks in air: Influence of the anode geometry

Hettiarachchi, Pasan; Rahman, Mahbubur; Cooray, Vernon; Dwyer, Joseph

Part of Journal of Atmospheric and Solar-Terrestrial Physics, p. 190-194, 2017

• DOI for X-rays from negative laboratory sparks in air: Influence of the anode geometry

On the occurrence of ‘bead lightning’ phenomena in long laboratory sparks

Vayanganie, S.P.A.; Cooray, Vernon; Rahman, Mahbubur; Hettiarachchi, Pasan et al.

Part of Physics Letters A, p. 816-821, 2016

• DOI for On the occurrence of ‘bead lightning’ phenomena in long laboratory sparks

The study of lightning strikes to common buildings in Brazil

Saba, Marcelo; Naccarato, Kleber; de Paiva, Amanda R; Schumann, Carina et al.

2016

Production of X-rays in air gaps stressed by switching impulse voltages

Rahman, Mahbubur; Hettiarachchi, Pasan; Cooray, Vernon; Dwyer, J. R. et al.

2016

Fractal analysis of long laboratory sparks of high speed video recordings

Vayanganie, Amila; Gunasekara, Lasitha; Fernando, Mahendra; Sonnadara, Upul et al.

2016

Experimental study of leader tortuosity and velocity in long rod-plane air discharges

Diaz, Oscar; Hettiarachchi, Pasan; Rahman, Mahbubur; Cooray, Vernon et al.

Part of IEEE transactions on dielectrics and electrical insulation, p. 806-812, 2016

• DOI for Experimental study of leader tortuosity and velocity in long rod-plane air discharges

X-rays from long laboratory sparks: Influence of the anode geometry

Hettiarachchi, Pasan; Rahman, Mahbubur; Cooray, Vernon

Part of International Conference on Atmospheric Electricity ICAE 2014, Norman, OK, U.S.A., 2014

Associations between accelerometer-assessed occupational and leisure-time sitting and self-reported cognitive dysfunction in Swedish middle-aged adults: a cross-sectional analysis from the SCAPIS study

Bergman, Frida; Boraxbekk, Carl-Johan; Hettiarachchi, Pasan; Svartengren, Magnus et al.

Part of BMC Public Health, 2026

• DOI for Associations between accelerometer-assessed occupational and leisure-time sitting and self-reported cognitive dysfunction in Swedish middle-aged adults: a cross-sectional analysis from the SCAPIS study
• Download full text (pdf) of Associations between accelerometer-assessed occupational and leisure-time sitting and self-reported cognitive dysfunction in Swedish middle-aged adults: a cross-sectional analysis from the SCAPIS study

X-rays from long laboratory sparks in air: Negative lightning impulse

Rahman, Mahbubur; Hettiarachchi, Pasan; Wooi, C-L.; Lobato, André et al.

2026

Free-living sit-to-stand angular velocity derived from thigh-worn accelerometry slows during pregnancy, but is not associated with binary self-reported discomfort prevalence

Pellerine, Liam P.; Frankel, Hannah Nortoft; Begtrup, Luise Molenberg; O'Brien, Myles W. et al.

Part of Gait & Posture, 2026

• DOI for Free-living sit-to-stand angular velocity derived from thigh-worn accelerometry slows during pregnancy, but is not associated with binary self-reported discomfort prevalence
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Development and evaluation of wrist- and thigh-worn accelerometer algorithms using self-training machine learning models for classification of activity type and posture: towards device placement-agnostic methods in the ProPASS consortium

Ahmadi, Matthew N.; Koemel, Nicholas; Biswas, Raaj; Holtermann, Andreas et al.

Part of International Journal of Behavioral Nutrition and Physical Activity, 2026

• DOI for Development and evaluation of wrist- and thigh-worn accelerometer algorithms using self-training machine learning models for classification of activity type and posture: towards device placement-agnostic methods in the ProPASS consortium
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Changes in physical activity across retirement: a compositional data analysis approach in a Swedish cohort study

Sacco, Lawrence B; Högnäs, Robin S; Palarea-Albaladejo, Javier; Hettiarachchi, Pasan et al.

Part of European Review of Aging and Physical Activity, 2026

• DOI for Changes in physical activity across retirement: a compositional data analysis approach in a Swedish cohort study
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Associations between accelerometer-assessed occupational and leisure-time sitting and self-reported cognitive dysfunction in Swedish middle-aged adults: a cross-sectional analysis from the SCAPIS study

Bergman, Frida; Boraxbekk, Carl-Johan; Hettiarachchi, Pasan; Svartengren, Magnus et al.

Part of BMC Public Health, 2026

• DOI for Associations between accelerometer-assessed occupational and leisure-time sitting and self-reported cognitive dysfunction in Swedish middle-aged adults: a cross-sectional analysis from the SCAPIS study
• Download full text (pdf) of Associations between accelerometer-assessed occupational and leisure-time sitting and self-reported cognitive dysfunction in Swedish middle-aged adults: a cross-sectional analysis from the SCAPIS study

Free-living sit-to-stand angular velocity derived from thigh-worn accelerometry slows during pregnancy, but is not associated with binary self-reported discomfort prevalence

Pellerine, Liam P.; Frankel, Hannah Nortoft; Begtrup, Luise Molenberg; O'Brien, Myles W. et al.

Part of Gait & Posture, 2026

• DOI for Free-living sit-to-stand angular velocity derived from thigh-worn accelerometry slows during pregnancy, but is not associated with binary self-reported discomfort prevalence
• Download full text (pdf) of Free-living sit-to-stand angular velocity derived from thigh-worn accelerometry slows during pregnancy, but is not associated with binary self-reported discomfort prevalence

Development and evaluation of wrist- and thigh-worn accelerometer algorithms using self-training machine learning models for classification of activity type and posture: towards device placement-agnostic methods in the ProPASS consortium

Ahmadi, Matthew N.; Koemel, Nicholas; Biswas, Raaj; Holtermann, Andreas et al.

Part of International Journal of Behavioral Nutrition and Physical Activity, 2026

• DOI for Development and evaluation of wrist- and thigh-worn accelerometer algorithms using self-training machine learning models for classification of activity type and posture: towards device placement-agnostic methods in the ProPASS consortium
• Download full text (pdf) of Development and evaluation of wrist- and thigh-worn accelerometer algorithms using self-training machine learning models for classification of activity type and posture: towards device placement-agnostic methods in the ProPASS consortium

Changes in physical activity across retirement: a compositional data analysis approach in a Swedish cohort study

Sacco, Lawrence B; Högnäs, Robin S; Palarea-Albaladejo, Javier; Hettiarachchi, Pasan et al.

Part of European Review of Aging and Physical Activity, 2026

• DOI for Changes in physical activity across retirement: a compositional data analysis approach in a Swedish cohort study
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Device-Measured Sleep Characteristics, Daily Step Count, and Cardiometabolic Health Markers: Findings From the Prospective Physical Activity, Sitting, and Sleep (ProPASS) Consortium

Bian, Wenxin; Ahmadi, Matthew N.; Biswas, Raaj Kishore; Blodgett, Joanna M. et al.

Part of Circulation. Cardiovascular Quality and Outcomes, 2025

• DOI for Device-Measured Sleep Characteristics, Daily Step Count, and Cardiometabolic Health Markers: Findings From the Prospective Physical Activity, Sitting, and Sleep (ProPASS) Consortium
• Download full text (pdf) of Device-Measured Sleep Characteristics, Daily Step Count, and Cardiometabolic Health Markers: Findings From the Prospective Physical Activity, Sitting, and Sleep (ProPASS) Consortium

Development of a quantitative job exposure matrix for standing, walking, and forward bending among pregnant workers: The PRECISE JEM

Nørtoft Frankel, Hannah; Meulengracht Flachs, Esben; Sandal Sejbaek, Camilla; Aavang Petersen, Jonathan et al.

Part of Scandinavian Journal of Work, Environment and Health, p. 526-536, 2025

• DOI for Development of a quantitative job exposure matrix for standing, walking, and forward bending among pregnant workers: The PRECISE JEM
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Validation and comparative study of the Motus system for accurately identifying movement behaviours using different sampling frequencies

Ludvigsen, Tonje Pedersen; Horluck, Sebastian Asmussen Sode; Larsen, Jon Roslyng; Lund, Christina Bach et al.

Part of Scientific Reports, 2025

• DOI for Validation and comparative study of the Motus system for accurately identifying movement behaviours using different sampling frequencies
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Validation of sleep-wake estimation from thigh-worn accelerometers against polysomnography in adolescents with and without mental disorders

Wilms, Martin; Søndergaard, Anne; Jennum, Poul Jørgen; Johansson, Peter et al.

Part of BMC Psychiatry, 2025

• DOI for Validation of sleep-wake estimation from thigh-worn accelerometers against polysomnography in adolescents with and without mental disorders
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Associations between daily composition of 24 h physical behavior with affective states and working memory

Le, Flora; Mattern, Viola; Johansson, Peter; Hettiarachchi, Pasan et al.

Part of Scientific Reports, 2025

• DOI for Associations between daily composition of 24 h physical behavior with affective states and working memory
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Comparing Physical Activity Metrics From Different Placements of Thigh-Worn Accelerometers

Franzese, Fabio; Hettiarachchi, Pasan; Holtermann, Andreas; Ahmadi, Matthew et al.

Part of Journal for the Measurement of Physical Behaviour, 2025

• DOI for Comparing Physical Activity Metrics From Different Placements of Thigh-Worn Accelerometers
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Associations between knee pain and knee-loading physical activities at work and leisure: a cross-sectional study based on accelerometer measurements

Törnblom, Margareta; Haglund, Emma; Bremander, Ann; Nilsdotter, Anna et al.

Part of BMC Musculoskeletal Disorders, 2025

• DOI for Associations between knee pain and knee-loading physical activities at work and leisure: a cross-sectional study based on accelerometer measurements
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Device-Measured 24-Hour Movement Behaviors and Blood Pressure: A 6-Part Compositional Individual Participant Data Analysis in the ProPASS Consortium

Blodgett, Joanna M.; Ahmadi, Matthew N.; Atkin, Andrew J.; Pulsford, Richard M. et al.

Part of Circulation, p. 159-170, 2025

• DOI for Device-Measured 24-Hour Movement Behaviors and Blood Pressure: A 6-Part Compositional Individual Participant Data Analysis in the ProPASS Consortium
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Assessing the criterion validity of the activPAL CREA v1.3 algorithm and ActiPASS 2023.12 software for detecting steps during a progressive treadmill-based laboratory protocol

Pellerine, Liam. P.; Courish, Molly K.; Petterson, Jennifer L.; Shivgulam, Madeline E. et al.

Part of Journal of Sports Sciences, p. 1951-1958, 2024

• DOI for Assessing the criterion validity of the activPAL CREA v1.3 algorithm and ActiPASS 2023.12 software for detecting steps during a progressive treadmill-based laboratory protocol

Longitudinal Associations between 24-h Movement Behaviors and Cardiometabolic Biomarkers: A Natural Experiment over Retirement

Suorsa, Kristin; Leskinen, Tuija; Gupta, Nidhi; Andersen, Lars l. et al.

Part of Medicine & Science in Sports & Exercise, p. 1297-1306, 2024

• DOI for Longitudinal Associations between 24-h Movement Behaviors and Cardiometabolic Biomarkers: A Natural Experiment over Retirement

Relationship of device measured physical activity type and posture with cardiometabolic health markers: pooled dose-response associations from the Prospective Physical Activity, Sitting and Sleep Consortium

Ahmadi, Matthew N.; Blodgett, Joanna M.; Atkin, Andrew J.; Chan, Hsiu-Wen et al.

Part of Diabetologia, p. 1051-1065, 2024

• DOI for Relationship of device measured physical activity type and posture with cardiometabolic health markers: pooled dose-response associations from the Prospective Physical Activity, Sitting and Sleep Consortium
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Assessing the Accuracy of Activity Classification Using Thigh-Worn Accelerometry: A Validation Study of ActiPASS in School-Aged Children

Lendt, Claas; Hettiarachchi, Pasan; Johansson, Peter; Duncan, Scott et al.

Part of Journal of Physical Activity and Health, p. 1092-1099, 2024

• DOI for Assessing the Accuracy of Activity Classification Using Thigh-Worn Accelerometry: A Validation Study of ActiPASS in School-Aged Children

Direct observations of X-rays produced by upward positive lightning

Oregel-Chaumont, Toma; Sunjerga, Antonio; Hettiarachchi, Pasan; Cooray, Vernon et al.

Part of Scientific Reports, 2024

• DOI for Direct observations of X-rays produced by upward positive lightning
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Changes in Accelerometer-Measured Physical Activity and Sedentary Time Across Retirement Transition as a Predictor of Self-Rated Health

Fröberg, Andreas; Sacco, Lawrence; Suorsa, Kristin; Leskinen, Tuija et al.

Part of Journal of Physical Activity and Health, p. 778-786, 2024

• DOI for Changes in Accelerometer-Measured Physical Activity and Sedentary Time Across Retirement Transition as a Predictor of Self-Rated Health

Device-measured physical activity and cardiometabolic health: the Prospective Physical Activity, Sitting, and Sleep (ProPASS) consortium

Blodgett, Joanna M.; Ahmadi, Matthew N; Atkin, Andrew J; Chastin, Sebastien et al.

Part of European Heart Journal, p. 458-471, 2023

• DOI for Device-measured physical activity and cardiometabolic health: the Prospective Physical Activity, Sitting, and Sleep (ProPASS) consortium
• Download full text (pdf) of Device-measured physical activity and cardiometabolic health: the Prospective Physical Activity, Sitting, and Sleep (ProPASS) consortium

Moving Beyond the Characterization of Activity Intensity Bouts as Square Waves Signals

O'Brien, Myles; Petterson, Jennifer; Pellerine, Liam; Shivgulam, Madeline et al.

Part of Journal for the Measurement of Physical Behaviour, p. 162-167, 2023

• DOI for Moving Beyond the Characterization of Activity Intensity Bouts as Square Waves Signals

CHANGES IN PHYSICAL ACTIVITY, SEDENTARY TIME, AND SELF-RATED HEALTH ACROSS THE RETIREMENT TRANSITION

Westerlund, Hugo; Fröberg, Andreas; Sacco, Lawrence; Suorsa, Kristin et al.

Part of Innovation in Aging, p. 711-711, 2023

• DOI for CHANGES IN PHYSICAL ACTIVITY, SEDENTARY TIME, AND SELF-RATED HEALTH ACROSS THE RETIREMENT TRANSITION
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Step Length, But Not Stepping Cadence, Strongly Predicts Physical Activity Intensity During Jogging and Running

Pellerine, Liam P.; Petterson, Jennifer L.; Shivgulam, Madeline E.; Johansson, Peter et al.

Part of Measurement in Physical Education and Exercise Science, p. 352-361, 2023

• DOI for Step Length, But Not Stepping Cadence, Strongly Predicts Physical Activity Intensity During Jogging and Running

Modifications of 24-h movement behaviors to prevent obesity in retirement: a natural experiment using compositional data analysis

Suorsa, Kristin; Gupta, Nidhi; Leskinen, Tuija; Andersen, Lars L. et al.

Part of International Journal of Obesity, p. 922-930, 2023

• DOI for Modifications of 24-h movement behaviors to prevent obesity in retirement: a natural experiment using compositional data analysis
• Download full text (pdf) of Modifications of 24-h movement behaviors to prevent obesity in retirement: a natural experiment using compositional data analysis

Development and performance of a sleep estimation algorithm using a single accelerometer placed on the thigh: an evaluation against polysomnography

Johansson, Peter; Crowley, Patrick; Axelsson, John; Franklin, Karl et al.

Part of Journal of Sleep Research, 2023

• DOI for Development and performance of a sleep estimation algorithm using a single accelerometer placed on the thigh: an evaluation against polysomnography
• Download full text (pdf) of Development and performance of a sleep estimation algorithm using a single accelerometer placed on the thigh: an evaluation against polysomnography

The Surveillance of Physical Activity, Sedentary Behavior, and Sleep: Protocol for the Development and Feasibility Evaluation of a Novel Measurement System

Crowley, Patrick; Ikeda, Erika; Islam, Sheikh Mohammed Shariful; Kildedal, Rasmus et al.

Part of JMIR Research Protocols, 2022

• DOI for The Surveillance of Physical Activity, Sedentary Behavior, and Sleep: Protocol for the Development and Feasibility Evaluation of a Novel Measurement System
• Download full text (pdf) of The Surveillance of Physical Activity, Sedentary Behavior, and Sleep: Protocol for the Development and Feasibility Evaluation of a Novel Measurement System

Frequency spectra of various events pertinent to lightning cloud flashes obtained from wavelet transform technique and ratified by narrow band measurement technique

Sharma, S. R.; Ismail, Mohd Muzafar; Hettiarachchi, Pasan; Cooray, Vernon et al.

Part of Journal of Atmospheric and Solar-Terrestrial Physics, 2021

• DOI for Frequency spectra of various events pertinent to lightning cloud flashes obtained from wavelet transform technique and ratified by narrow band measurement technique

Validity of a Non-Proprietary Algorithm for Identifying Lying Down Using Raw Data from Thigh-Worn Triaxial Accelerometers

Hettiarachchi, Pasan; Aili, Katarina; Holtermann, Andreas; Stamatakis, Emmanuel et al.

Part of Sensors, 2021

• DOI for Validity of a Non-Proprietary Algorithm for Identifying Lying Down Using Raw Data from Thigh-Worn Triaxial Accelerometers
• Download full text (pdf) of Validity of a Non-Proprietary Algorithm for Identifying Lying Down Using Raw Data from Thigh-Worn Triaxial Accelerometers

Observations of X-rays from Laboratory Sparks in Air at Atmospheric Pressure under Negative Switching Impulse Voltages

Rahman, Mahbubur; Hettiarachchi, Pasan; Cooray, Vernon; Dwyer, Joseph et al.

Part of Atmosphere, 2019

• DOI for Observations of X-rays from Laboratory Sparks in Air at Atmospheric Pressure under Negative Switching Impulse Voltages
• Download full text (pdf) of Observations of X-rays from Laboratory Sparks in Air at Atmospheric Pressure under Negative Switching Impulse Voltages

High-Speed Video Observation of a Dart Leader Producing X-rays

Saba, M. M. F.; Ferro, M. A. S.; Cuactros, E. T.; Custodio, D. M. et al.

Part of Journal of Geophysical Research - Space Physics, p. 10564-10570, 2019

• DOI for High-Speed Video Observation of a Dart Leader Producing X-rays
• Download full text (pdf) of High-Speed Video Observation of a Dart Leader Producing X-rays

X-ray observations at Gaisberg Tower

Hettiarachchi, Pasan; Cooray, Vernon; Diendorfer, Gerhard; Pichler, Hannes et al.

Part of Atmosphere, 2018

• DOI for X-ray observations at Gaisberg Tower
• Download full text (pdf) of X-ray observations at Gaisberg Tower

Characteristics of leader pulses in positive ground flashes in Sweden

Johari, Dalina; Cooray, Vernon; Rahman, Mahbubur; Hettiarachchi, Pasan et al.

Part of Electric power systems research, p. 3-9, 2017

• DOI for Characteristics of leader pulses in positive ground flashes in Sweden

On the possible origin of chaotic pulse trains in lightning flashes

Ismail, Mohd Muzafar; Rahman, Mahbubur; Cooray, Vernon; Fernando, Mahendra et al.

Part of Atmosphere, 2017

• DOI for On the possible origin of chaotic pulse trains in lightning flashes
• Download full text (pdf) of On the possible origin of chaotic pulse trains in lightning flashes

Energy Distribution of X-rays Produced by Meter-long Negative Discharges in Air

Hettiarachchi, Pasan; Cooray, Vernon; Rahman, Mahbubur; Dwyer, Joseph

Part of Atmosphere, 2017

• DOI for Energy Distribution of X-rays Produced by Meter-long Negative Discharges in Air

Features of the First and Subsequent Return Strokes in Positive Ground Flashes based on Electric Field Measurements

Johari, Dalina; Cooray, Vernon; Rahman, Mahbubur; Hettiarachchi, Pasan et al.

Part of Electric power systems research, p. 55-62, 2017

• DOI for Features of the First and Subsequent Return Strokes in Positive Ground Flashes based on Electric Field Measurements

X-rays from negative laboratory sparks in air: Influence of the anode geometry

Hettiarachchi, Pasan; Rahman, Mahbubur; Cooray, Vernon; Dwyer, Joseph

Part of Journal of Atmospheric and Solar-Terrestrial Physics, p. 190-194, 2017

• DOI for X-rays from negative laboratory sparks in air: Influence of the anode geometry

On the occurrence of ‘bead lightning’ phenomena in long laboratory sparks

Vayanganie, S.P.A.; Cooray, Vernon; Rahman, Mahbubur; Hettiarachchi, Pasan et al.

Part of Physics Letters A, p. 816-821, 2016

• DOI for On the occurrence of ‘bead lightning’ phenomena in long laboratory sparks

Characteristics of preliminary breakdown pulses in positive ground flashes during summer thunderstorms in Sweden

Johari, Dalina; Cooray, Vernon; Rahman, Mahbubur; Hettiarachchi, Pasan et al.

Part of Atmosphere, 2016

• DOI for Characteristics of preliminary breakdown pulses in positive ground flashes during summer thunderstorms in Sweden
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On the characteristics of positive lightning ground flashes in Sweden

Baharudin, Zikri Abadi; Cooray, Vernon; Rahman, Mahbubur; Hettiarachchi, Pasan et al.

Part of Journal of Atmospheric and Solar-Terrestrial Physics, p. 106-111, 2016

• DOI for On the characteristics of positive lightning ground flashes in Sweden

Experimental study of leader tortuosity and velocity in long rod-plane air discharges

Diaz, Oscar; Hettiarachchi, Pasan; Rahman, Mahbubur; Cooray, Vernon et al.

Part of IEEE transactions on dielectrics and electrical insulation, p. 806-812, 2016

• DOI for Experimental study of leader tortuosity and velocity in long rod-plane air discharges

Electric field signatures in wideband, 3 MHz and 30 MHz of negative ground flashes pertinent to Swedish thunderstorms

Ismail, Mohd Muzafar; Rahman, Mahbubur; Cooray, Vernon; Sharma, Shriram et al.

Part of Atmosphere, p. 1904-1925, 2015

• DOI for Electric field signatures in wideband, 3 MHz and 30 MHz of negative ground flashes pertinent to Swedish thunderstorms
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Latitude Dependence of Narrow Bipolar Pulse Emissions

Ahmad, Mohd Riduan; Mohd Esa, Mona Riza; Cooray, Vernon; Baharudin, Zikri Abadi et al.

Part of Journal of Atmospheric and Solar-Terrestrial Physics, p. 40-45, 2015

• DOI for Latitude Dependence of Narrow Bipolar Pulse Emissions

Basic electromagnetic theory - a summary

Cooray, Vernon; Hettiarachchi, Pasan; Cooray, Gerald

Part of Lightning Electromagnetics, The Institution of Engineering and Technology, 2012

• DOI for Basic electromagnetic theory - a summary

Measurements of X-Ray Emission from Laboratory Sparks and Upward Initiated Lightning

Hettiarachchi, Pasan

2018

• Download full text (pdf) of Measurements of X-Ray Emission from Laboratory Sparks and Upward Initiated Lightning

X-rays from long laboratory sparks in air: Negative lightning impulse

Rahman, Mahbubur; Hettiarachchi, Pasan; Wooi, C-L.; Lobato, André et al.

2026

Attachment process of the discharge of competing grounded electrodes - Experimental observations and modeling

Arevalo, Liliana; Lobato, André; Cooray, Vernon; Hettiarachchi, Pasan et al.

Part of 2021 35th International Conference on Lightning Protection (ICLP) and XVI International Symposium On Lightning Protection (SIPDA), 2021

• DOI for Attachment process of the discharge of competing grounded electrodes - Experimental observations and modeling

Observations of X-rays in 4-meters long laboratory sparks under positive lightning impulse

Wooi, Chin-Leong; Hettiarachchi, Pasan; Rahman, Mahbubur; Cooray, Vernon et al.

Part of 2021 35TH INTERNATIONAL CONFERENCE ON LIGHTNING PROTECTION (ICLP) AND XVI INTERNATIONAL SYMPOSIUM ON LIGHTNING PROTECTION (SIPDA), 2021

• DOI for Observations of X-rays in 4-meters long laboratory sparks under positive lightning impulse

Time Domain Analysis of the Lightning Interaction with Wave Energy Converters

Hettiarachchi, Pasan; Lobato, André; Cooray, Vernon; Leijon, Mats

Part of 2018 34th international conference on lightning protection (ICLP 2018), 2018

The leader propagation velocity in long air gaps

Arevalo, Liliana; Wu, Dong; Hettiarachchi, Pasan; Cooray, Vernon et al.

Part of 2018 34th international conference on lightning protection (ICLP 2018), 2018

• DOI for The leader propagation velocity in long air gaps

Impedance Behavior of Earth Enhancing Compound Under Lightning Transient Conditions

Chandimal, A. P. L.; Hettiarachchi, Pasan; Nanayakkara, S.; Sapumanage, N. et al.

Part of 2018 34th international conference on lightning protection (ICLP 2018), 2018

Study on responses of SPDs against the transient voltages generated by CG flashes

Sapumanage, Nilantha; Nanayakkara, Sankha; Abeygunawardena, Sidath; Chandimal, Lasantha et al.

2018

Characteristics of chaotic pulse trains associated with dart and dart-stepped leader in lightning flashes in Sweden

Ismail, Muzafar M.; Rahman, Mahbubur; Cooray, Vernon; Hettiarachchi, Pasan et al.

2017

Wavelet transform reveals the origin of chaotic pulse train in lightning flashes

Ismail, Muzafar M.; Cooray, Vernon; Rahman, Mahbubur; Hettiarachchi, Pasan et al.

2017

Some features of preliminary breakdown pulses in positive ground flashes in Sweden

Johari, Dalina; Cooray, Vernon; Rahman, Mahbubur; Hettiarachchi, Pasan et al.

2017

The study of lightning strikes to common buildings in Brazil

Saba, Marcelo; Naccarato, Kleber; de Paiva, Amanda R; Schumann, Carina et al.

2016

Production of X-rays in air gaps stressed by switching impulse voltages

Rahman, Mahbubur; Hettiarachchi, Pasan; Cooray, Vernon; Dwyer, J. R. et al.

2016

Fractal analysis of long laboratory sparks of high speed video recordings

Vayanganie, Amila; Gunasekara, Lasitha; Fernando, Mahendra; Sonnadara, Upul et al.

2016

Some characteristics of subsequent return strokes in positive ground flash in Sweden

Johari, Dalina; Cooray, Vernon; Rahman, Mahbubur; Hettiarachchi, Pasan et al.

2016

On comparison between initial breakdown pulses and narrow bipolar pulses in lightning discharges with special attention to electric field derivative characteristics

Ismail, Muzafar; Cooray, Vernon; Rahman, Mahbubur; Hettiarachchi, Pasan et al.

2016

Special attention to impedance of conductivity enhancing backfill materials

Chandimal, APL; Hettiarachchi, Pasan; Nanayakkara, Sankha; Cooray, Vernon et al.

2016

Some characteristics of leader pulses in positive cloud-to-ground flashes

Johari, Dalina; Cooray, Vernon; Hettiarachchi, Pasan; Rahman, Mahbubur et al.

Part of 2015 International Symposium On Lightning Protection (Xiii SIPDA), p. 283-287, 2015

• DOI for Some characteristics of leader pulses in positive cloud-to-ground flashes

HF and VHF electric field radiation produced by preliminary breakdown process pertinent to Swedish thunderstorms

Ismail, M. M.; Sharma, S. R.; Cooray, Vernon; Hettiarachchi, P. et al.

Part of 2015 Asia-Pacific International Conference on Lightning (APL), Nagoya, Japan, 2015

On the possible origin of chaotic pulse trains in lightning flashes

Ismail, Muzafar M.; Cooray, Vernon; Hettiarachchi, Pasan; Rahman, Mahbubur et al.

Part of 2015 International Symposium on Lightning Protection (XIII SIPDA), Balneário Camboriú, Brazil, 28th Sept. – 2nd Oct. 2015., p. 409-412, 2015

X-rays from long laboratory sparks: Influence of the anode geometry

Hettiarachchi, Pasan; Rahman, Mahbubur; Cooray, Vernon

Part of International Conference on Atmospheric Electricity ICAE 2014, Norman, OK, U.S.A., 2014

Preliminary Observations of Lightning Signature At 2400 MHz in Sweden Thunderstorm

Ahmad, Mohd Riduan; Mohd Esa, Mona Riza Binti; Hettiarachchi, Pasan; Cooray, Vernon

p. 88-91, 2012

• DOI for Preliminary Observations of Lightning Signature At 2400 MHz in Sweden Thunderstorm

Electric Field Signature of Narrow Bipolar Pulse Observed in Sweden

Ahmad, Mohd Riduan; Mohd Esa, Mona Riza; Cooray, Vernon; Hettiarachchi, Pasan et al.

2014

Electric field changes generated by preliminary breakdown pulse for positive lightning ground flashes in Sweden

Baharudin, Zikri Abadi; Cooray, Vernon; Rahman, Mahbubur; Hettiarachchi, Pasan et al.