I got one offer from another university which I have differed to spring semester. I have accepted the offer from Penn state since the gap between acceptance deadline and offer was just 15 days and I was trying different professors for funding. I am still not sure how it works at Penn state (Aerospace Engineering), whether they give you offer with funding (if they want to fund you) or you have to contact each professor individually as I have still some more professor to ask. Also, I am hoping that one of my work is going to be published (Physical Review) in a month or so, which may increase my chances later but I will have to wait for an year.