GACoS  Gateway to Academic Contents SystemUTokyo logo

GACoS is renewed as Literacy on the University of Tokyo Library System.
Thank you for using GACoS for a long time.
GACoS will no longer be updated, so please use Literacy.

GACoS is a gateway to search for documents and other academic information over the Internet. It can be used to support your research activity. Japanese

 Academic Paper Support Book: Start here 【Web edition】
(Released: 2014.3.31, Last updated: 2020.1.31)

Just try a search! (What is TREE [UTokyo REsource Explorer])

There are many tools to search for books and papers.
"TREE" is a useful tool when you are in a situation where "you don't know which database to use", or "you want to conduct a search to see what kind of papers or books there are from wide range of information.

"TREE"(UTokyo REsource Explorer) is simply a service which allows you to search academic information from one search window. You can search for books, electronic and paper materials all at once without worrying about choosing a database.
Figure 3:What is TREE (UTokyo REsource Explorer)?

"TREE" is mainly searches within the University of Tokyo OPAC and databases that the university has contracted with (which permission was given from the providers). So it allows searches in the range of materials that the University of Tokyo students, faculty and staff have easy access.
However, TREE cannot search through all the information. There are materials such as Japanese newspaper databases which are outside of TREE search, so it is important to know how to use individual databases according to the purpose.

Some TREE search results can only be accessed on campus.
(See 【To access databases and e-journals at home/during business trips】)

◆Merits of TREE:
  1. You can search with the author name or article title. TREE simultaneously searches through printed materials in the libraries, electronic journals, and e-books.
    On the other hand, with UTokyo OPAC, you can search for printed materials in the libraries with the book or journal title, but cannot search for individual papers in journals by author names or article titles.
  2. Some electronic journals and academic information search tools are charged. These are subscribed by the university and are available free of charge for students, faculty and staff of the University of Tokyo.
    You can extend your academic information search to electronic journals etc. that the University of Tokyo is subscribed to by using TREE.
  3. When using multiple search tools individually, search rules differ according to the tool. Using TREE enables users to search for data from multiple databases from one window without considering the different search rules between search tools.
◆Demerits of TREE:
  1. TREE searches through information recorded on many search tools. Searches may return irrelevant results, because of the sheer volume of information subject to the search. If you feel that TREE is inconvenient, try searching with individual search tools.
  2. If you already know which database will return the most relevant results, or want to use a specific function of a database, TREE is not recommended.
(See 【Search with a tool that suits your needs/research field】)

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