For the benefit of those who haven't been through the CambridgeUniversity system, this is what's called a tutor at most other Universities. They organise supervisions, any college tests to make sure you're coping okay, etc. It's worth going to a college with a good one in your subject.
Denial of Service
Density of States, which is currently causing StuartFraser significant CognitiveDissonance? during his literature review.