Professors who are hired on a contractual basis, normally in part-time https://insureopinion.com/%EC%95%8C%EB%B0%94%EC%97%B0%EB%B4%89-%EC%97%AC%EC%84%B1-%EA%B5%AC%EC%9D%B8%EA%B5%AC%EC%A7%81%EC%97%90%EC%84%9C%EC%9D%98-%EC%A4%91%EC%9A%94%EC%84%B1%EA%B3%BC-%ED%99%9C%EC%9A%A9-%EB%B0%A9%EB%B2%95/