Zahari, N., L. Gan and X. Mao 2026. THE IMPACT OF ATMOSPHERIC STABILITY ON HELICAL WAKE BEHIND A ROTATING BLADE: THE PHYSICS OF HELICAL VORTEX CORE IN PHYSICAL SPACE. (PART 1) . Journal of Mechanical Engineering and Technology (JMET). 18, 1 (Jun. 2026), 90–101. DOI:https://doi.org/10.54554/jmet.2026.18.01.010.