What effects did nationalism have on the hapsburg and ottoman empires?

Nationalism contributed to the decline of the Hapsburg Empire; nationalist wanted a restoration of the old order, but the Empire wanted a multicultural empire, so the nationalist revolted in 1848. Nationalism also led to the dissolution of the Ottoman Empire; Balkan nationalists revolted against Ottomans, hoping to set up their independent states, and when the empire began to fail, European powers (Britain, Austria and Russia among others) tousled to divide up Ottoman lands.

I believe that Korea maintained a separate and unique culture.
Whereas Japan and China are intermingled, with Japan having taken a lot of Chinese culture and adapted it as its own, Korea managed not to give in to outside influences. Japan took the writing system (kanji) from China, as well as many other cultural aspects - however, Korea remained isolated, especially in the context of Asian cultures.