Just as the subject areas covered in doctorate studies are numerous, so are the topics for research. This is actually the primary determinant of what your research is based on since it is your area of expertise once your Ph.D. is obtained. It doesn't matter if your degree subject area is architecture, business education or cultural studies, a myriad of specified Ph.D. research topics are available to use for your doctoral dissertation.
Every field and subject matter has some sort of historical significance from recent to distant history. Analyzing and discussing how your subject area has made an impact on history and humanity allows you to display your knowledge of a specific subject. For instance, if you are in pursuit of a Ph.D. in art, your research can show the incorporation of modern creative tools and technique into art forms that have existed for decades.
Ph.D. programs based in science are numerous since there are five categories of science. These categories include agricultural, life, health, physical and social and behavioral sciences. In addition, each category has at least five specific fields of study. For example, if you are studying agricultural science, your research topics are based on topics that include animal sciences, entomology, plant sciences and nutrition. Science-based Ph.D. research possibilities are comprised of over 50 specific topics.
Mathematics is a universal topic with a myriad of Ph.D. subject areas. As in other subject areas, your dissertation topic is based primarily on which area of math you are studying. Applied mathematics, statistics and probability are each feasible Ph.D. research areas. However, mathematics itself is also an expansive subject matter, so your research topics may be best if based in your personal interests. Ideas might include number theory, algebraic geometry or elliptic curves, for instance.