SEOUL -- Scandals and transition challenges at South Korea's powerful family-run conglomerates are opening up opportunities for activist investors to move in, with the country's biggest local fund already turning up the heat. Korea Corporate Governance Improvement -- which made a name for itself last year by taking on scandal-plagued Korean Air Lines and the Cho family behind it -- announced last week that it had acquired a 32.65% stake in Daelim Corp., another chaebol. KCGI is now the second-largest shareholder in the group, which control midsize builder Daelim Industrial.