http://www.mdpi.com/journal/challenges Latest open access articles published in Challenges at http://www.mdpi.com/journal/challenges Challenges 2078-1547 http://www.mdpi.com/2078-1547/1/1/1 One of the unique features of several journals launched by me is that manuscripts regarding research proposals and research ideas are particularly welcomed for presentation. Now, a journal Challenges is created for this purpose. [...] http://www.mdpi.com/2078-1547/1/1/1 Sun, 31 Jan 2010 23:00:01 GMT Challenges 2010-02-01 1 1 Editorial 1 2 2078-1547 Challenges – An Open Access Scientific Journal for Research Proposals and Open Problems 2010-02-01 doi:10.3390/challe1010001 Shu-Kun Lin