The algebraic approach to database query processing continues to be successful long after its introduction in relational database. This paper is devoted to database algebras. The purpose of this paper is to convey some idea of the general nature of database algebras in the hope of gaining some insight into why certain operations exist and of identifying common themes among these algebras.

Indexed in Elsevier Bibliographic Database (Scopus and EMBASE) SCImago Journal Rank 0.129 Impact factor 0.67* Rapid and Easy Publishing The “International Journal of Pharma and Bio Sciences” (IJPBS) is an international journal in English published quarterly. The aim of IJPBS is to publish peer reviewed research and review articles rapidly without delay in the developing field of pharmaceutical ...

Indexed in Elsevier Bibliographic Database (Scopus and EMBASE) SCImago Journal Rank 0.129 Impact factor 2.958* Rapid and Easy Publishing The “International Journal of Pharma and Bio Sciences” (IJPBS) is an international journal in English published quarterly. The aim of IJPBS is to publish peer reviewed research and review articles rapidly without delay in the developing field of pharmaceutical...

Presents a summary report of journal operations compiled from the 2016 annual reports of the Council of Editors and from Central Office records. Also includes a summary report of division journal operations compiled from the 2016 annual reports of the division journal editors. (PsycINFO Database Record

Until recently Cases Journal and the Journal of Medical Case Reports were part of BioMed Central, which, as many readers have noticed, has been sold to Springer Science+ Business Media. Cases Journal and the Journal of Medical Case Reports have not, however, been sold. Instead they will join together with Cases Database to form Cases Network. Both of these developments are good news for science...

INTRODUCTION Publishing research results as journal articles is the most common format used by researchers for dissemination of advancements in science. To select where to publish, authors must know how to identify the most recognized journals in each field, adopting quality criteria. PURPOSE To discuss journal selection criteria and bibliometric indicators for evaluation of scientific produc...

Copyright of the publisher: Intellectual property, in particular copyright (rights in editorial content), trademarks (rights in brands for services or journals), and database rights (rights in compilations of information), form the foundation of Elsevier’s publishing services and communications businesses. We in Elsevier embrace the opportunities the digital environment offers for communication...

Citation metrics and h indices differ using different bibliometric databases. We compiled the number of publications, number of citations, h index and year since the first publication from 340 soil researchers from all over the world. On average, Google Scholar has the highest h index, number of publications and citations per researcher, and the Web of Science the lowest. The number of papers i...