<p>0) I will be doing my third SURF soon. I'm definitely not the only one. The number of people who do more than one SURF is probably less than 50%, but off the top of my head I can think of many, many people who did two or more.</p>
<p>1) SURF is in fact 10 weeks out of either 15 or 16, depending on the way the academic calendar is laid out. Very often, you can even get away in the middle of the SURF. The SURF office is very flexible with this, so if your professor is as well (which is very common), then you're golden. This summer I will take three separate trips totaling exactly five weeks, so my SURF will go from the end of finals (i.e., now) straight to the beginning of the fall term. My prof is totally cool with this.</p>
<p>2) It depends... it's a comparison between doing 6 to 9 or so hours a week versus doing 40 a week. I have found that working 40 hours a week doesn't necessarily imply making 40/9 = 4.44 times more progress... it's usually less than that. But all in all, I think research during term and SURFs are not that different. I've done Ae100 (Research in Aeronautics) twice and ME100 (Advanced Work in Mechanical Engineering) twice, and two SURFs on top of that. I'd say that each experience has given me comparable contact with faculty (good for getting recommendation letters!) and comparable chances of publishing. For me, it so happens that I did Ae100 and ME100 later in my career than the SURFs, so the work was more "serious." But it doesn't have to be that way. Which leads to the next point....</p>
<p>3) Depends on what exactly you're going for. The SURF office is not ashamed to say that students should use SURFs as a testing ground to see if they really want to go into a particular field or not. So if you're an underclassman and you just want to gain exposure to a field, then SURF is a great way to do it. And you're right, as an upperclassman your SURF might be more advanced than as an underclassman; so if your goal is to publish, or at least to get serious work done before grad school, then that works too. I should point out, though, that I haven't heard of many people doing research during the term to prepare for SURF. While this is possible, it seems to me that SURFs are usually independent from projects done during the school year. It may have to do with having different sources of funding, or something like that.</p>
<p>4) I'd say in between, but the student should definitely be the one taking the initiative. Professors do post SURF opportunities on the SURF website, but students are encouraged to review professors' research topics, find some that pique your interest, and ask the profs directly for SURF opportunities. There were one or two times after I've already established connections that a professor asked me to do a SURF, instead of the other way around, but that's probably an exception.</p>