1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
## 2020-08-31
How big of a difference in preservation coverage stats does the inclusion of
PKP PLN numbers result in?
select count(*), sum(journal.release_count), sum(journal.preserved_count) from journal join directory on journal.issnl = directory.issnl where directory.slug = 'pkp_pln';
count(*) sum(journal.release_count) sum(journal.preserved_count)
---------- -------------------------- ----------------------------
1356 343333 283984
So about 60k releases.
How about Hathitrust?
select count(*), sum(journal.release_count), sum(journal.preserved_count) from journal join directory on journal.issnl = directory.issnl where directory.slug = 'hathitrust';
count(*) sum(journal.release_count) sum(journal.preserved_count)
---------- -------------------------- ----------------------------
26628 48160184 36905342
Much larger potential impact, of 11+ million releases, though unclear how many
are acutally in the hathitrust archives.
## 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!
|
