博士論文: doctoral dissertation

博士論文: doctoral dissertation

半分: half

分裂: division, split / 分列: filing off in a parade

文次郎: a male given name

春分: spring equinox

分光: a spectrum / 分校: a branch school, a satellite campus / 文公: Duke Wen of Jin (晋文公, Jìn Wén Gōng, 697–628 BCE), a leader of the kingdom of Jin (晉 / 晋) during China's Spring and Autumn Period

分光: to divide light into a spectrum / 聞香: to smell a fragrance

節分: The last day of winter in the traditional Japanese calendar.

人文: the humanities