مقایسهٔ روش‌ها

	دایرکتوری جهانی نشریات اولریشزوب (Ulrichsweb Global Serials Directory)	Directory of Open Access Journals	پایگاه داده Scopus
حوزه	کتاب‌سنجی	کتاب‌سنجی	کتاب‌سنجی
خانواده	Process / pipeline	Process / pipeline	Process / pipeline
سال پیدایش	1932	2003	2004
پدیدآور	Bowker (originally R.R. Bowker), now ProQuest LLC	DOAJ Community (Swedish library consortium, later expanded to international consortium)	Elsevier
نوع	Database	Database	Database
منبع بنیادین	ProQuest. (2024). Ulrichsweb: Global Serials Directory. Retrieved from https://ulrichsweb.serialssolutions.com/	Directory of Open Access Journals. (2024). About DOAJ. Retrieved from https://doaj.org/	Elsevier. (2024). Scopus: The largest abstract and citation database of peer-reviewed literature. Retrieved from https://www.elsevier.com/products/scopus
نام‌های دیگر	Ulrichsweb, Ulrich's International Periodicals Directory, Ulrich's Directory	DOAJ, Directory of Open Access	Scopus, Elsevier Scopus
مرتبط	4	5	5
خلاصه	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.	The Directory of Open Access Journals (DOAJ) is a community-maintained, freely accessible directory of high-quality, peer-reviewed open-access journals and articles established in 2003. DOAJ indexes over 20,000 open-access journals across all disciplines (sciences, social sciences, humanities, arts) from diverse geographic regions. The directory serves researchers, librarians, and administrators as the authoritative curated list of legitimate open-access journals—differentiating quality open-access publications from predatory journals that lack genuine peer review. DOAJ quality seal, awarded to journals meeting stricter governance and transparency criteria, enables identification of the highest-caliber open-access publications.	Scopus, owned by Elsevier, is the world's largest abstract and citation database covering peer-reviewed journals, conference proceedings, and book chapters across all scientific disciplines. Launched in 2004, Scopus now indexes over 37 million documents from more than 6,500 journals, with expanded coverage of open-access publications and emerging regional journals. Scopus provides researchers and institutions with comprehensive citation tracking, field-normalized impact metrics (CiteScore, SJR, SNIP), and analytical tools for literature discovery, research evaluation, and institutional benchmarking.