"Han Jak Ryu"@en . . . "researcher"@en . . "Han Jak Ryu"@en . "\u0434\u043E\u0441\u043B\u0456\u0434\u043D\u0438\u043A"@uk . "Han Jak Ryu"@en . . "ikertzailea"@eu . "wetenschapper"@nl . .