Results 11 to 20 of about 1,605,158 (279)
Lightning initiation: Strong pulses of VHF radiation accompany preliminary breakdown [PDF]
Scientific Reports, 2018 We analyze lightning initiation process using magnetic field waveforms of preliminary breakdown (PB) pulses observed at time scales of a few tens of microseconds by a broad-band receiver.
Ivana Kolmašová +11 more
doaj +6 more sources
Characterization preliminary breakdown in the measured lightning electric fields [PDF]
2014 IEEE 8th International Power Engineering and Optimization Conference (PEOCO2014), 2014 In this study, characterization of measured electric fields due to lightning channel was done. Likewise, previous studies on this case were reviewed and discussed accordingly. Furthermore, preliminary breakdown was done in detail and it was indicated on the real measured electric fields and the results were discussed.
N Rameli, M Izadi, M Z A Ab Kadir
exaly +4 more sources
Characteristics of Preliminary Breakdown Pulses in Positive Ground Flashes during Summer Thunderstorms in Sweden [PDF]
Atmosphere, 2016 This paper presents the characteristics of the preliminary breakdown pulses (PBP) in 51 positive ground flashes recorded during 2014 summer thunderstorms in Sweden.
Dalina Johari +4 more
doaj +5 more sources
Time domain simulations of preliminary breakdown pulses in natural lightning [PDF]
Journal of Geophysical Research: Atmospheres, 2015 AbstractLightning discharge is a complicated process with relevant physical scales spanning many orders of magnitude. In an effort to understand the electrodynamics of lightning and connect physical properties of the channel to observed behavior, we construct a simulation of charge and current flow on a narrow conducting channel embedded in three ...
Carlson +4 more
openaire +6 more sources
Characteristics of the Preliminary Breakdown in Inverted-polarity Intracloud Lightning Flashes
应用气象学报, 2023 The intracloud (IC) flashes can be classified into normal and inverted-polarity types according to their initial leader propagation directions. Due to the rare occurrence of inverted-polarity IC flashes with downward preliminary breakdown (PB) processes,
Gao Panliang +4 more
doaj +2 more sources
Atmosphere, 2016 Using an automated data processing algorithm, we examined electric field records of 5498 negative cloud-to-ground flashes reported by the U.S. National Lightning Detection Network (NLDN) within 50 to 500 km of the Lightning Observatory in Gainesville ...
Yanan Zhu +2 more
doaj +3 more sources
Enhancing formation breakdown pressure using optimized drilling fluid additives with preventive wellbore strengthening approach [PDF]
Scientific ReportsAccurate evaluation of formation fracture pressure is essential to prevent induced fracturing and mitigate drilling fluid losses, representing one of the major challenges in oil and gas well drilling operations.
Ahmadreza Abdshahi +4 more
doaj +2 more sources
Temporal and Spatial Characteristics of Preliminary Breakdown Pulses in Intracloud Lightning Flashes [PDF]
Journal of Geophysical Research D: Atmospheres, 2019 AbstractWe have studied the temporal and spatial characteristics of preliminary breakdown (PB) pulses in 32 normal intracloud flashes recorded by a fast antenna lightning mapping array system called Fast Antenna Lightning Mapping Array. It was found that PB processes started with a stage of preliminary isolated pulses (PIPs) and followed by classic PB ...
Daohong Wang, Shi Dong Dong, Ting Wu
exaly +2 more sources
Remote SensingWe have studied the parameters of preliminary breakdown (PB) pulses in 395 normal and 319 inverted intracloud (IC) flashes observed in Gifu, Japan, and Ningxia, China, respectively, by using a low-frequency mapping system called fast antenna lightning ...
Dongdong Shi +8 more
doaj +3 more sources
Characterization Preliminary Breakdown in the Measured Lightning Electric Fields on Malaysia Data [PDF]
Applied Mechanics and Materials, 2015 This paper presents a characteristic of lightning electric fields. The lightning electric fields were captured by two parallel plats sensor and the characterization for preliminary breakdown pulse (PBP) was studied. A total of 207 data were recorded and 10 data are selected and been utilized in this paper accordingly.
Chandima Gomes, M Z A Ab Kadir
exaly +2 more sources