Arabic academic digital libraries evaluation: the methods and measurements, from user's perspective

The article deals with evaluation methodologies of academic digital libraries' usability, which were presented from two points of view. the first shows these methods divided according to the Application style either the Inspection method or the experimental one. the second highlights it divided according to the evaluation process stages. Also outlines Data collecting methods and tools of usability evaluation are divided according to the extent of users' participation in the evaluation process and to the extent of dependency on usability experts in the evaluation process execution.
also highlights the digital library evaluation measures, the factors affecting it, and the interrelations among to select the most appropriate, common, and used ones. this is can be a basis of a suggested evaluation model for the academic digital libraries from its user's and the developing expert's opinion. these measurements have been presented divided into measures related to digital library interfaces and measures related to these systems' users' preferences and opinions. the article concluded that it could develop an evaluation model for the Arab academic digital libraries from its users' and develop experts' points of view using usability. usefulness and accessibility measurements.