There's no way to evade having a lot of acronyms in a scientific paper, often already in the title.

I use the [latex](/questions/tagged/latex "show questions tagged 'latex'") package `glossaries` to automatically expand the first use of every acronym (except usage in the title), but for a scientific paper, I do not include a table of acronyms (for my thesis I do). In a long paper, if someone does not remember all acronyms or does not read sequentially, it could be difficult to look up the meaning.

If I use a not very well known acronym in, say, line 100, and again in line 500, should I expand it again, or is it a better style to stick with expanding only and exactly once?