cultures, applications of in vitro cell systems to neurodegenerative disorders and autologous neuronal and muscle co-cultures were particularly interesting. Papers discussing the mechanisms of MPTP neurotoxicity and neuronal plasticity triggered by glutamate also read well. The editors indexed the book thoroughly, although the papers themselves are plagued with misspellings and grammatical erro...

72 1024x768 normal 0 false false false en-us x-none ar-sa background : by providing a picture from published articles in a field, bibliometric studies can inform policy-makers in their challenging research funding decisions. in this regard, we applied bibliometric analysis to the iranian pediatrics articles published in pubmed indexed journals between 1975 and 2007. methods : we evaluated all p...

The trends of scientific articles about tuberculosis in Brazil published between 1986 and 2006 were analyzed. This analysis included Capes database-indexed dissertations and theses and papers indexed in Medline and SciELO. Papers containing the word "tuberculosis" and authors affiliated to Brazilian institutions were included in the assessment. The analysis showed initially case report and revi...

introduction: based on iran’s 20-year prospective national vision document, iran may be seen as the most developed country in science and technology in the region by 2025. in this report, bibliometric indicators are used to compare the research productivity in endodontics between iran and 28 selected asian countries. materials and methods: medical subject headings keyword-searching of pubmed up...

Abstract One of the most fundamental issues in academia today is understanding differences between legitimate and questionable publishing. While decision-makers managers consider journals indexed popular citation indexes such as Web Science or Scopus legitimate, they use two lists (Beall’s Cabell’s), one which has not been updated for a few years, to identify so-called predatory journals. The m...

Sir, At the beginning of the 21 century, the third millennium, the pandemic flu A (H1N1) occurred. Between mid March and mid April 2009, a pandemic influenza A virus emerged in Mexico. The disease spread very quickly in different parts of the world. It has to be said that the disease infected millions of population in different continents and killed at least 18449 people, but less than the prev...

Years Iranian Journal of Pediatrics (Iran J Pediatr) is the first medical journal published in Iran focusing on one specific field. From the first English issue, Iran J Pediatr was indexed in ISI, while it was being indexed in other international databases too. Impact factor of scientific journals is calculated and reported by the Institute for Scientific Information (ISI), annually. Journal im...

This article presents a lemma in the spirit of the pumping lemma for indexed languages but easier to employ. Section

We consider the cyclic closure of a language, and its gener-alisation to the operators C k introduced by Brandstädt. We prove that the cyclic closure of an indexed language is indexed, and that if L is a context-free language then C k (L) is indexed.