Only a loser makes one report twice at different conferences. Twice one report can not be done. And three times too it is impossible. Yes, yes, and four times. Beginning authors who have written only one text, approved by the supervisor, for some reason forget about this rule of the scientific community and begin to send their theses to all possible conferences. However, students are usually forgiven, but in the list of publications 3 articles with the same title and almost the same volume are immediately shown to colleagues: you are dealing with a loser who forgets that the number of scientific publications must be supported by their quality.
Remember: the co-authorship of the student and supervisor often looks ridiculous and humiliating for the supervisor. Because if the text was written by a scientist, then why would he assign a student to himself? And if a student is, well, with the scientist who allowed this, then everything is clear too. The function of the supervisor is precisely in the manual, but not in the co-authorship of any work written by his student. Cases of equal scientific partnership of a student and his supervisor, which could be considered co-authorship, are extremely rare.
Scientific conferences are a wonderful celebration of science. It was at the conferences that the young scientist (student, graduate student, young PhD) gets the opportunity to present the results of his work to the scientific community. It is at conferences that students and graduate students learn to talk on an equal footing with professors and academics, hone the skills of public speaking. The first time is always scary. Very scary. And any professor still surely remembers how his knees shook as he walked to the blackboard, clutching the leaves of his first scientific report
By the way, questions are asked and the thoughts that have come to mind are voiced after the report, and not during it, and to the speaker, not the neighbor.
Be benevolent and correct. If the discussion gave the speaker some new thoughts, somehow contributed to his further scientific development, then the conference was not in vain for him. And it’s always nice.