Incomplete question, here some examples that shed light on the question.
Answer:
Here some topic examples according to Alex Schmid;
Review of national terrorism prevention programs and policies in a comparative perspective;
Explanation:
Note, Alex Schmid is of the view that certain topics as regards terrorism is been neglected or as he puts it; "Un- and Under-researched."
Thus, the topics listed above are hard-line areas that needs extensive research work inorder to reduce the effects of terrorism.