Vol.4 No.1 2011

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Research paper : Development and release of a spectral database for organic compounds (T. Saito et al.)−40−Synthesiology - English edition Vol.4 No.1 (2011) that cannot be maintained by ourselves. Since 2006, the links to online catalog of Tokyo Chemical Industry Co., Ltd.,[11] and Chemical Materials Link Center operated by Japan Science and Technology Agency[12] have been maintained. Components, such as a search system for Japanese compound names and chemical structures which have not been covered by us, have been supplemented by the links.One of the advantages of data release by the Web is its easiness of data management in a lump. It became possible to provide all users with equal services at a time by updating data in the database server. A feature different from other researches is the fact that the comments from the users come directly to us through the Web.Before the data was opened to the public through the Web, an online access was possible since 1989[13] and the databases were sold in a CD-ROM medium with both data and their search engine from 1991[14]. It was only specific users of some tens of domestic users that were able to use this CD-ROM medium. In this format of distribution, contents could be stored for a long time. However, it was limited to the data collected up to the point the CD-ROM was created. Updating data contents and renewal of data managing software were difficult for all the users. Moreover, the service was offered to limited users who owned the CD-ROM. However, having enabled search and display of data by CD-ROM that operated on MS-DOS, it provided an opportunity of exercise for the present format of data release through the Web. This was similar to the pioneering works before the development of this database that helped to create the appropriate design of the database. Opening to the public with CD-ROM might have been an important project for opening this database to the public through the Web.4.2 The analysis of users and the role as public resourcesFor the analysis of the database users, an access log in the fiscal year 2009 was analyzed and classified by country identification codes. Figure 6 indicates the data. Of more than 50 million page views, accesses from domestic users were about 14 %. The most accesses came from the North America region. The domains that cannot be assigned to specific regions such as “.net” and “.com” were classified independently. Focusing on the accesses from Japan, shown in Fig. 7, the most accesses came from the users of “.ac.jp” or those accesses from academic institutes, and the accesses from “.ne.jp”, or network providers and “.co.jp” or general enterprises follow the academic users. Users accessed through the “.ac.jp” and “.ne.jp” domains have intense seasonal variations in the number of accesses. The accesses of March and August were less than half of June when there were the most accesses. On the other hand, roughly the same level of accesses came from the “.co.jp” domain throughout the year. The seasonal dependency of access was thought to be caused by summer break and the end of the scholastic year of students. The access tendency of users through the network providers resembles that of academic institutes. Therefore, the majority of users accessed through the “.ne.jp” were suggested to be also students; the database has been used by many students.This database is used by various users, and it is one of the public resources that a public research organization such as AIST provides. In general, database compiles much information, and demonstrates its strength by retrieving necessary information efficiently. Many resources and much time are needed for the development and maintenance of such a database, and this database is not an exception. The database users may become limited if we ask the users for the equivalent amount of the development and maintenance costs. This database takes a role of giving various people who are in industry as well as those just starting to learn the usage of spectral data an opportunity by showing it as free accessible Fig. 6 Fractions of regional domains of users who accessed this database in the fiscal year 2009Domains “.com” and “.net” are counted independently of the unplaceable domains. The unknown indicates users whose access domains cannot be specified, for instance, those who accessed to the database with only IP addresses.Fig. 7 Fractions of domestic domain of users who accessed this database in the fiscal year 2009Domains of academics, network providers etc., enterprises, benevolent corporations etc., network administrations, and governmental institutes correspond to “.ac.jp”, “.ne.jp”, “.co.jp”, “.or.jp”, “.ad.jp”, and “.go.jp”, respectively. Other “.jp” domains are added up as “others”. Unknown 28 %Other areas 3 %Asia pacific 2 %.net 15 %.com 6 %Europe 15 %North America16 %Japan 14 %Others 5 %Governmental institutes3 %Benevolent corporation3 %Network administrations3 %Enterprises24 %Network providers 27 %Academic36 %

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