if a present a research content in a poster in one conference and then i got chance to a presentation with more content in another conference ,with different audience , is it ok?
Oral and poster presentations are integral part of scientific meetings, and the organizers encourage posters because of several reasons, the prime being time constraints. Some participants submit their papers for “poster” presentation only. Sometimes, the organizers decide whether to admit the paper for oral presentation or poster presentation.
Papers that contain results of just one aspect or results from some ongoing study may be accepted for poster displays only. If your submission has more contents, it would be selected for oral presentations.
It is not ethical to present a poster in one conference and then the same content as oral presentation in another conference.