No.18
September,1998
Based on NACSIS-IR usage statistics for the 12 months of fiscal 1997, the table below lists the top 10 databases in terms of number of connections, connection duration, and number of records output. The union catalog related databases occupy the top positions overall. Among databases produced outside NACSIS, the Japanese Periodicals Index and the Science Citation Index Expanded were the most popular. Among databases produced by NACSIS, the Directory of Researchers was the most widely used. Finally, among databases supplied by researchers, such as the Index for General Information of Home Economics Research were used the most often.
| Ranking | Number of Connection | Connections | Connection duration | Minutes | Number of records output | Records |
|---|---|---|---|---|---|---|
| 1 | Union Catalog of Books | 67,842 | Union Catalog of Books | 704,770 | Union Catalog of Books | 793,361 |
| 2 | Union Catalog of Serials | 40,816 | Union Catalog of Serials | 386,075 | Japanese Periodicals Index | 425,029 |
| 3 | Japanese Periodicals Index | 19,327 | Japanese Periodicals Index | 117,883 | Union Catalog of Serials | 379,636 |
| 4 | Directory of Researchers | 12,080 | Directory of Researchers | 81,486 | JPMARC | 160,565 |
| 5 | Science Citation Index Expanded | 9,493 | Science Citation Index Expanded | 65,517 | Science Citation Index Expanded | 157,622 |
| 6 | JPMARC | 8,012 | JPMARC | 65,448 | Register of Grant-in-aid Scientific Research | 107,448 |
| 7 | LCMARC (Books) | 4,547 | LCMARC (Books) | 40,553 | LCMARC (Books) | 104,955 |
| 8 | Academic Conference Papers | 3,650 | LCMARC (Serials) | 24,800 | Directory of Researchers | 99,731 |
| 9 | Social Sciences Citation Index | 3,228 | Academic Conference Papers | 21,796 | Economic Titles Japan | 80,072 |
| 10 | COMPENDEX PLUS | 3,100 | Index for General Information of Home Economics Research | 18,040 | Index for General Information of Home Economics Research | 78,843 |