function rndIssue(address _to, uint _value) onlyOwner public
    {
        uint tokens = _value * E18;
        require(maxRndSupply >= tokenIssuedRnd.add(tokens));
        
        balances[_to] = balances[_to].add(tokens);
        
        totalTokenSupply = totalTokenSupply.add(tokens);
        tokenIssuedRnd = tokenIssuedRnd.add(tokens);
        
        emit RndIssue(_to, tokens);
    }