My point is not directly related to the technical research but I think it is relevant to researchers because in many cases, especially for LDC countries, there is no ( or little ) fund for researcher to present their research work in an international conference/symposium/workshop held in abroad. So foreign funding has become essential for them. May be, there are several sources all over the world that can finance authors for presenting their work in abroad. Would you please provide me information of such types of sources?