▁and ▁phenomen ology , ▁as ▁well ▁as ▁invent ing ▁one ▁of ▁the ▁first ▁pro tot ypes ▁of ▁an ▁analog ▁computer . ▁Roger ▁Joseph ▁Bos cov ich ▁was ▁a ▁R ag us an ▁phys ic ist , ▁astronom er , ▁math ematic ian ▁and ▁poly math ▁of ▁pat ernal ▁Ser bian ▁origin ▁▁▁▁ ▁( although ▁there ▁are ▁compet ing ▁claims ▁for ▁Bo š k ović ' s ▁national ity ) ▁who ▁produced ▁a ▁prec ursor ▁of ▁atomic ▁theory ▁and ▁made ▁many ▁contributions ▁to ▁astronom y ▁and ▁also ▁discovered ▁the ▁absence ▁of ▁atmosphere ▁on ▁the ▁Moon . ▁J ovan ▁C v iji ć ▁founded ▁modern ▁ge ography ▁in ▁Ser bia ▁and ▁made ▁pione ering ▁research ▁on ▁the ▁ge ography ▁of ▁the ▁B alk an ▁Pen ins ula , ▁Din ar ic ▁race ▁and ▁kar st . ▁Jos if ▁Pan č ić ▁made ▁contributions ▁to ▁bot any ▁and ▁discovered ▁a ▁number ▁of ▁new ▁fl oral ▁species ▁including ▁the ▁Ser bian ▁spr uce . ▁Bi ologist ▁and ▁phys i ologist ▁Ivan ▁ Đ aja ▁performed ▁research ▁in ▁the ▁role ▁of ▁the ▁ad ren al ▁g lands ▁in ▁therm or eg ulation , ▁as ▁well ▁as ▁pione ering ▁work ▁in ▁hypoth erm ia . ▁V alt azar ▁Bog iš ić ▁is ▁considered ▁to ▁be ▁a ▁pione er ▁in ▁the ▁soci ology ▁of ▁law ▁and ▁soci ological ▁juris pr ud ence . ▁G ord ana ▁V un jak - Nov akov ic ▁is ▁a ▁Ser bian ▁American ▁bi omed ical ▁engineer ▁foc using ▁on ▁engineering ▁human ▁t issues ▁for