Compara mètodes
Revisa els mètodes seleccionats l'un al costat de l'altre; les files que difereixen es ressalten.
| PubMed i MEDLINE× | Ulrichsweb Directori Global de Publicacions Seriades× | |
|---|---|---|
| Camp | Bibliometria | Bibliometria |
| Família | Process / pipeline | Process / pipeline |
| Any d'origen≠ | 1966 | 1932 |
| Autor original≠ | National Library of Medicine (NLM), U.S. National Institutes of Health | Bowker (originally R.R. Bowker), now ProQuest LLC |
| Tipus | Database | Database |
| Font seminal≠ | National Library of Medicine. (2024). PubMed: Home. Retrieved from https://pubmed.ncbi.nlm.nih.gov/ link ↗ | ProQuest. (2024). Ulrichsweb: Global Serials Directory. Retrieved from https://ulrichsweb.serialssolutions.com/ link ↗ |
| Àlies≠ | PubMed, MEDLINE, NLM, PubMed Central | Ulrichsweb, Ulrich's International Periodicals Directory, Ulrich's Directory |
| Relacionats≠ | 5 | 4 |
| Resum≠ | PubMed is a free, publicly accessible literature database maintained by the National Library of Medicine (NLM), a division of the U.S. National Institutes of Health. It provides access to biomedical and life sciences literature from MEDLINE (the curated subset of ~30 million indexed journal articles), life science journals, in-process articles, and preprints. MEDLINE, established in 1966, is the gold standard for biomedical literature indexing, using MeSH (Medical Subject Headings), a hierarchical controlled vocabulary of ~33,000 terms. PubMed is the primary discovery tool for clinicians, researchers, and healthcare professionals worldwide seeking evidence-based information. | Ulrichsweb is a comprehensive, subscription-based global serials directory cataloging over 300,000 print and electronic journals, magazines, newspapers, and other periodical publications. Developed by ProQuest (originally R.R. Bowker), Ulrichsweb has served librarians and researchers for over 90 years as the authoritative source for journal metadata, publication information, and peer-review verification. A unique feature is Ulrichsweb's verification program: editorial staff contact journals directly to confirm peer-review claims, marking journals as 'refereed' only after validation. This verification process distinguishes legitimate peer-reviewed journals from predatory publishers falsely claiming peer review. |
| ScholarGateConjunt de dades ↗ |
|
|