To be clear to everyone else, the parent and the grandparent have just described respectively conference papers and journal papers. Journal papers are usually a bit longer and represent more work, conference papers are usually shorter and take a bit less time. This of course is a generalization.
For example, a PhD thesis might be the full written-up version of 3-4 conference papers you'd have published in the course of your PhD, and then you might condense the important part of your thesis into a single journal paper afterwards, but this is only a vague example and there are many ways of skinning this cat. There are many examples of extremely short conference papers that have had a major impact in their field, and there are _millions_ of completely forgettable journal papers.
The above broadly holds for any of the scientific research disciplines with which I'm familiar.
For example, a PhD thesis might be the full written-up version of 3-4 conference papers you'd have published in the course of your PhD, and then you might condense the important part of your thesis into a single journal paper afterwards, but this is only a vague example and there are many ways of skinning this cat. There are many examples of extremely short conference papers that have had a major impact in their field, and there are _millions_ of completely forgettable journal papers.
The above broadly holds for any of the scientific research disciplines with which I'm familiar.