For a language L, we consider its cyclic closure, and more generally the language C(L), which consists of all words obtained by partitioning words from L into k factors and permuting them. We prove that the classes of ET0L and EDT0L languages are closed under the operators C. This both sharpens and generalises Brandstädt’s result that if L is context-free then C(L) is context-sensitive and not ...

Omitted citations – i.e., missing links between a cited paper and the corresponding citing papers – are the main consequence of several bibliometric-database errors. To reduce these errors, databases may undertake two actions: (i) improving the control of the (new) papers to be indexed, i.e., limiting the introduction of “new” dirty data, and (ii) detecting and correcting errors in the papers a...

UNLABELLED Yale Image Finder (YIF) is a publicly accessible search engine featuring a new way of retrieving biomedical images and associated papers based on the text carried inside the images. Image queries can also be issued against the image caption, as well as words in the associated paper abstract and title. A typical search scenario using YIF is as follows: a user provides few search keywo...

سخن سردبیر Editorial مجله دانشگاه علوم پزشکی رفسنجان دوره نوزدهم، دی 1399، 1014-1013       مقالات منتشر شده خودتان را بخوانید Read Your Published Papers     محسن رضائیان[1]   M. Rezaeian     تا کنون در مجله دانشگاه، پیرامون مطالعه مستمر یک مقاله قبل از چاپ آن توسط نویسندگان، نکات مهمی را به رشته تحریر در آورده‌ایم [3-1]. مطالعه‌ی چند باره یک مقاله، قبل از آن که مقاله منتشر گردد،...

Recent literature has shown that all-pay auctions raise more money for charity than either winner-pay auctions or lotteries. We demonstrate that first-price and second-price winnerpay auctions have a better revenue performance than first-price and second-price all-pay auctions when bidders are sufficiently asymmetric. Lotteries can also provide higher revenue than all-pay auctions. To prove thi...

In this paper it is shortly presented PubMed as one of the most important on-line databases of the scientific biomedical literature. Also, the author has analyzed the most cited authors, professors of the medical faculties in Bosnia and Herzegovina, from the published papers in the biomedical journals abstracted and indexed in PubMed.

The objective of this study is to review ethical and clinical guidelines and position papers concerning the presymptomatic and predictive genetic testing of minors. The databases Medline, Philosopher's Index, Biological Abstracts, Web of Science and Google Scholar were searched using keywords relating to the presymptomatic and predictive testing of children. We also searched the websites of the...

When searching the medical literature, health professionals and lay people strongly prefer to use their native language. Therefore, Medical Subject Headings (MeSH) translations would be helpful to those who are not fluent in English to access scientific papers indexed in the MEDLINE bibliographic database. Furthermore, medical terminologies such as MeSH are challenging in any language. In this ...