Acquiring unpublished population documents in Africa: a personal experience     

Kwafo-akoto KO 《Aslib proceedings》1988,40(4):105-110

Acquiring both published and unpublished documents produced in Africa is, generally, a difficult task due to the existing poor state of bibliographic control and the publishing industry. It is even more difficult to obtain unpublished documents in a specialized area of study such as demography--a diffuse area which cuts across several disciplines. This paper discusses the problems encountered on acquisition trips to some African countries to acquire unpublished population material. To help solve the problems, the Population Association of Africa must persuade its members to send copies of their publications to population libraries and documentation centers in their individual countries for dissemination to the other users in Africa. The various organizations and institutions in Africa engaged in the teaching and research of population studies should have an agreement to exchange copies of their theses. The Economic Commission for Africa (ECA) and the Organization of African Unity (OAU) should make representations to the various African member countries on the need to disseminate the results of vital censuses and surveys conducted. Finally, the Population Information Network for Africa (POPIN-AFRICA) with its coordinating unit at the population division of ECA should ensure that all the nodes of the network have the financial and other resources to be able to acquire the relevant documents needed for their operations.  相似文献   

The Use of Internet,Quasi-multimedial and Multimedial Educational Systems at the Technical University KoŠice     

GEJZA M. TIMČÁK  PETER KOŠĆ  JURAJ PAŇKO 《European Journal of Engineering Education》1996,21(3):245-253

Electronic mail entered the Technical University Ko?ice in 1990. Now, instead of the few tens of users at the beginning, the system hosts thousands of them. Interactive teaching programmes as well as teaching programmes that are supported by audio and visual channels have also been used since 1990. The paper presents a short account of past development, the present situation and perspectives within the area of Internet use and of tuition that employs multimedia related means of teaching.  相似文献   

Parametrically excited oscillation of stay cable and its control in cable-stayed bridges     

孙炳楠  汪至刚  高赞明  倪一清 《Journal of Zhejiang University. Science. B》2003,(1)

ＩＮＴＲＯＤＵＣＴＩＯＮＣａｂｌｅ ｓｔａｙｅｄｂｒｉｄｇｅｓａｒｅｗｉｄｅｌｙａｐｐｌｉｅｄｉｎｍｏｄｅｒｎｂｒｉｄｇｅｓｔｒｕｃｔｕｒａｌｓｙｓｔｅｍ .Ｔｈｅｌａｒｇｅｓｔｓｐａｎｏｆｃａｂｌｅ ｓｔａｙｅｄｂｒｉｄｇｅｉｓｃｌｏｓｅｔｏ 1 0 0 0ｍｗｈｅｎｍａｎｙｎｅｗｍａｔｅｒｉａｌｓａｎｄｔｅｃｈｎｏｌｏｇｉｅｓａｒｅａｐｐｌｉｅｄ.Ｔｈｅｓｔａｙｃａｂｌｅｓａｒｅｉｍｐｏｒｔａｎｔｂｒｉｄｇｅｓｔｒｕｃｔｕｒｅｃｏｍｐｏｎｅｎｔｓｍｏｓｔｐｒｏｎｅｔｏｅｘｈｉｂｉｔｈｉｇｈａｍｐｌｉｔｕ…  相似文献