Chizuko TAKEI -Bio- naoe.chizuko@ynu.ac.jp

• 2001 M.A., Area Studies, University of Tsukuba, Japan.

• 2005- (current) working as a librarian at Yokohama National University, Japan.

• 2012-(current) Master's program of Library, Information and Media Studies, University of Tsukuba, Japan.

own research• Collection development and

management of electronic resources.

• Differences of characteristics between subjects.

challenging problems• How do we develop journal backfiles

effectively?

• How differ the obsolescence of citation

and access by fields?