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diff --git a/notes/explore.md b/notes/explore.md new file mode 100644 index 0000000..6193309 --- /dev/null +++ b/notes/explore.md @@ -0,0 +1,74 @@ + +## 2020-06-23 + +Where do back ISSN-Ls come from? Answer: exiting fatcat metadata. + + select count(*) from journal where valid_issnl = 0; + => 4 + + select count(*) from journal where known_issnl = 0; + => 2304 + + select directory.slug, count(*) from journal join directory on journal.issnl = directory.issnl where journal.known_issnl = 0 group by directory.slug order by count(*) desc limit 20; + + select count(*) from journal join fatcat_container on journal.issnl = fatcat_container.issnl where journal.known_issnl = 0; + => 2,328 + => note: still a few dupe ISSN-L in fatcat_container + + +How many journals might be longtail but have just a handful of DOIs? And would +be lost if we filter by `has_doi=0`? + + select count(*) from journal where has_dois = 1 and release_count <= 10; + 9054 + + select count(*) from journal where has_dois = 1 and is_longtail = 1; + 15,575 + + select count(*) from journal where has_dois = 1 and (is_active is null or is_active = 1) and release_count <= 10 and any_homepage = 1; + => 5,843 + +How many *journals* would old query turn up? NOTE: have not verified new homepage URLs + + SELECT COUNT(DISTINCT journal.issnl), COUNT(DISTINCT homepage.url) + FROM homepage + LEFT JOIN journal ON homepage.issnl = journal.issnl + WHERE + homepage.terminal_status_code = 200 + AND journal.is_longtail = 1 + AND homepage.domain != 'archive.org' + AND homepage.host NOT LIKE '%scielo%' + AND homepage.domain != 'jst.go.jp' + AND homepage.host != 'books.google.com' + AND homepage.host != 'www.google.com' + AND journal.has_dois = 0; + => 16,471 journals + => 19,460 URLs + +New tweaks: + + SELECT COUNT(DISTINCT journal.issnl), COUNT(DISTINCT homepage.url) + FROM homepage + LEFT JOIN journal ON homepage.issnl = journal.issnl + WHERE + (homepage.terminal_status_code = 200 or homepage.blocked or homepage.terminal_status_code is null) + AND homepage.domain != 'archive.org' + AND homepage.host NOT LIKE '%scielo%' + AND homepage.domain != 'jst.go.jp' + AND homepage.host != 'books.google.com' + AND homepage.host != 'www.google.com' + AND homepage.domain != 'oclc.org' + AND homepage.host != 'www.ncbi.nlm.nih.gov' + AND homepage.domain != 'umi.com' + AND homepage.domain != 'doi.org' + AND homepage.host != 'www.thefreelibrary.com' + AND (journal.is_longtail = 1 + OR journal.publisher_type = 'society' + OR journal.publisher_type = 'unipress' + OR journal.publisher_type IS NULL) + AND (journal.has_dois = 0 or journal.release_count < 20); + => 57,637 journals + => 70,770 homepages + +This is a significant increase in size over previous crawls! + |