firstly u should check up on LORs and SOP. see if ur profs submitted the LORs on time
secondly, were ur packages complete and sent correctly?
thirdly, MAYBE ur UG marks were low. though ur gre/toefl are very good, for the unis tht u listed the cgpa would be low.
you could still try for Jan intake. But before that, pls email profs in all the colleges and tell them about ur case and ur IEEE papers etc. Request them to allow u to work with them and ask if they would agree to supervise ur MS. invariably they would tell wat is right/wrong with ur profile.
But overall it seems quite strange! U Minn and U arizona should have been within reach....but tell me one thing, when did u apply? if u wrote toefl only by november, did u apply by early jan atleaset? cuz the unis u applied to are very competitive and great profiles get rejected mainly cuz the admissions are filled by jan itself.
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