Text this: An experimental study of relative humidity and air flow effects on positive and negative corona discharges in a corona-needle charger

  ____     _    _     ______    ______    _  __  
 |  _ \\  | || | ||  /_   _//  /_   _//  | |/ // 
 | |_| || | || | ||    | ||     -| ||-   | ' //  
 | .  //  | \\_/ ||   _| ||     _| ||_   | . \\  
 |_|\_\\   \____//   /__//     /_____//  |_|\_\\ 
 `-` --`    `---`    `--`      `-----`   `-` --`