The Institute of Pure and Applied Physics (IPAP) publishes an online edition of Journal of the Physical Society of Japan (JPSJ), Japanese Journal of Applied Physics (JJAP) and Progress of Theoretical Physics (PTP).

• Publication Date of an article and its uploaded local time

  Since October 2003, IPAP publishes an online edition of Japanese Journal of Applied Physics Parts 1 & 2 before a publishing of their print edition. This means that the online edition of the journal is a primary publication. In making this change, a "published date" is added in each PDF article page and table of contents.
  Since January 2004, the JJAP Part 2 (Letters and Express Letters) is published weekly although its print edition is published at same schedule, once every two weeks.
  
  For a purpose of author's application of patent of his/her article, the actual uploaded local time at Tokyo, Japan will appear at the table of contents. Under the Japanese Patent Law, applicants are requested to provide a copy of web pages which indicate (1) the date of publication, (2) the URL where the article is available, (3) a print copy of the article and (4) producers name. (See for details in Japanese.) IPAP as a producer of the electronic edition of the journal validates that the electronic paper is the same as a print version by using the checksum method. (See the guide for "Checksum")

• Checksum for validate an article

  IPAP has introduced a system which uses checksums to validate the coidentity between the online and print editions of JJAP articles. (This system only applies to Japanese Journal of Applied Physics.) A unique number, 'checksum' is given to each PDF article in the table of contents, and is shown as
  "full text PDF: MD5 checksum = 3d948e4568d1ef8088a38465afetba8a".
  
  The 'checksum' is a md5-checksum for each PDF article. The 'checksum' is changed when the PDF article is replaced or changed in any way. This enables readers and authors to be sure that the article published on the IPAP server is the same as that in the print edition in the journal.
  
  If you need to validate a PDF article, for example, for the purpose of a patent application, please contact us via fax (+81-3-5844-3290) or e-mail (online-support@ipap.jp). We will send you the checksum of the PDF article via fax. [Note] We will not send you a hard-copy of the article.

• Journal URL & DOI

  The official URL and DOI (digital object identifier) of journals are the follows;

• Quality Policy of figures and photographs

• Mutual Linking from Reference List

  -IPAP produces a hyperlinking from journal article reference lists to their citing articles by using either Linkmanager or CrossRef in IPAP Online Journals.
  -To link to IPAP online journal articles, IPAP encourages publishers, libraries and readers to use the above URL methods.

• About DOI

  DOI (digital object indentifier) is given to each published article since 2002. Please see the official site for DOI and its missions.

Last updated 2005-05-23