1.   In other parts of Iran, the musicians who perform secretly at weddings and other parties still find themselves subject to periodic crackdown.

2.   Seasoned sidewalk analysts point out that the problem seems to be cyclical, with periodic crackdowns leading to a noticeable improvement, followed by another upsurge in offenses.

3.   The Parks Department readily acknowledges it cannot catch even a fraction of the violators, and compensates with periodic crackdowns.

4.   There is a cyclical quality to Turkish politics that gives these periodic crackdowns a deceptively benign appearance.

5.   These periodic crackdowns and the widespread use of execution have received broad popular support in China, despite the likelihood of wrongful convictions.

6.   Despite periodic crackdowns, police are known to extort monthly protection fees from brothel owners.

7.   Thousands of people are executed each year in periodic crackdowns on rising crime intended to intimidate the public, with increasing numbers put to death for non-violent offenses.

8.   The Iranian authorities have launched periodic crackdowns on women who fail to wear the all-encompassing garment known as the chador or a full-length coat and headscarf.