Unnes Science Education Journal

SINTA accreditation

The accreditation history (periods and decrees) is not recorded yet, so every article is shown with the current rank.

Records per year

Metadata quality

Share of this journal’s records with each property. The tick marks the median of the 729 journals in Melola; an orange bar is at least 5 points under it. Read each bar against the others rather than as a grade.

Completeness

• Abstract 100%

  Articles with at least one non-empty dc:description. 523 of 523. Median of the journals: 100%.

• Keywords 24.3%

  Articles with at least one keyword in dc:subject. 127 of 523. Median of the journals: 51.4%.

• DOI 98.9%

  Articles with a DOI in dc:identifier. 517 of 523. Median of the journals: 100%.

• Licence 0%

  Articles with a Creative Commons URL in dc:rights. 0 of 523. Median of the journals: 7.6%.

• Language 99.8%

  Articles with dc:language declared. 522 of 523. Median of the journals: 100%.

• Volume and issue 100%

  Articles whose dc:source gives both volume and issue. 523 of 523. Median of the journals: 100%.

• Pages 40.3%

  Articles whose dc:source gives page numbers. 211 of 523. Median of the journals: 96.8%.

• Full-text link 99.8%

  Articles with a PDF galley link. 522 of 523. Median of the journals: 99.1%.

Validity

• DOI registered (Crossref) —

  Of the DOIs looked up in Crossref, the share Crossref knows (HTTP 200 rather than 404). Median of the journals: 79.7%.

• Valid ISSNs 100%

  Records listing ISSNs in dc:source whose check digits are all valid. 523 of 523. Median of the journals: 100%.

• No escaped HTML 59.8%

  Records without escaped markup (e.g.  ) in the abstract. 313 of 523. Median of the journals: 90.9%.

• No broken characters 100%

  Records without U+FFFD (broken encoding) in the metadata. 523 of 523. Median of the journals: 100%.

Index coverage

• In OpenAlex —

  Articles found in OpenAlex (by DOI, or by title and year). Median of the journals: 68.8%.

• In Crossref —

  Articles found in Crossref (by DOI, or by title and year). Median of the journals: 60.9%.

• Reference list (OpenAlex) —

  Of the works found in OpenAlex, the share with a non-empty reference list. Median of the journals: 61.5%.

• In DOAJ (per OpenAlex) —

  Articles OpenAlex reports as indexed in DOAJ (OpenAlex claim). Median of the journals: 0%.

Repository

• Endpoint available 100%

  Availability checks (Identify) that found the endpoint active. 2 of 2. Median of the journals: 100%.

• Records not deleted 95.6%

  Harvested records that are not marked deleted by the endpoint. 523 of 547. Median of the journals: 100%.

Repository dates

earliestDatestamp reported by the endpoint: 2024-08-01T05:01:29Z implausible Later than the oldest record datestamp (2020-12-21).