What is open access?
Open access (OA) refers to free and unrestricted online access to scientific and scholarly information and makes published academic research freely and permanently available online. The concept of open access was firstly defined by The Budapest Open Access Initiative (BOAI). Angus Academic Press defines open access by the followings: peer-reviewed article is freely available without subscription or price barriers, article is immediately released in open access format (no embargo period), and published material can be re-used without obtaining permission as long as a correct citation to the original publication is given.
Please note that some materials such as figures, tables or text in articles may from other publications. In this case, you should inquire with the original copyright holder (usually the original publisher or authors), whether or not this material can be re-used.