Doty, Philip2443911842008-08-292017-05-112008-08-292017-05-112005http://hdl.handle.net/2152/3995textelectronicengCopyright is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.Web portalsCollege students--United StatesThe use of public Web portals by undergraduate studentsThesis