ces and humanities typically ranges from 50 to 450 pages in length. In many cases, depending on the discipline, a dissertation consists of (i) a comprehensive literature review, (ii) an outline of methodology, and (iii) several chapters of scientific, social, historical, philosophical, or literary analysis. Typically, upon completion, the candidate undergoes an oral examination, sometimes public, by his or her supervisory committee with expertise in the given discipline.As the Ph.D. degree is often a preliminary step toward a career as a professor, throughout the whole period of study and dissertation research the student may be required or at least offered the opportunity, depending on the university and degree, to teach undergraduate or sometimes graduate courses in relevant subjects.Admission[සංස්කරණය]There are 282 universities in the United States that award the Ph.D. degree, and those universities vary widely in their criteria for admission, as well as the rigor of their acade