The stipend is adjusted as other stipends are adjusted.
The length and amount of stipend for students supported on research assistantship (RA) or administrative assistantship (AA) is negotiated by the student and the faculty member.
These stipends go farther in Knoxville than in most other cities because of Knoxville's low cost of living. If you look at Yahoo's Neighborhood Information web-site, you will find that the cost of living index in Knoxville is 94 compared with a national average of 100. That means that you'd have to receive a stipend of $15,950 (15,000 * 100/94) in an average American city to have the same standard of living that a $15,000 stipend affords you Knoxville. If you are interested in how Knoxville compares with other cities, go to Yahoo's web-site and find the cost of living index for that city. For example, New York City's index is 122, which means that you would have to receive a stipend of $19,500 (15,000 * 122/94) to have the same standard of living in New York City that a $15,000 stipend affords you in Knoxville.
Students supported on faculty research funds should be able to attend at least one conference per academic year with reasonable costs up to $800 paid for by the faculty's research funding.