The purpose of this paper is to offer a method to help to objectively compare quality of publication in biomedical journals in different disciplines with varying ISI Impact Factors (IF). Three methods--the number of journals per ISI Journal Citation Report discipline category/10, the IF/10, and the log (IF+1)/10--were used to calculate an article score. The distribution of article scores were c...

We compare the Smith is Huq condition (SH) with three commutator conditions in semi-abelian categories: first an apparently weaker condition which arose in joint work with Bourn and turns out to be equivalent with (SH), then an apparently equivalent condition which takes commutation of non-normal subobjects into account and turns out to be stronger than (SH). This leads to the even stronger con...

We present a comparative study of certain invariants defined for group actions and their analogues orbifolds. In particular, we prove that Fadell's equivariant category $G$-spaces coincides with the Lusternik-Schnirelmann orbifolds when is finite.

This is an expanded, revised and corrected version of the first author’s preprint [1]. The discussion of one-dimensional cohomology H in a fairly general category E involves passing to the (2-)category Cat(E) of categories in E . In particular, the coefficient object is a category B in E and the torsors that Hclassifies are particular functors in E . We only impose conditions on E that are sati...

Many accounts of categorization equate goodness-of-example with central tendency for common taxonomic categories; the best examples of a category are average members--those that are most similar to most other category members. In the present study, we asked 24 tree experts and 20 novices to rate goodness-of-example for a sample of 48 trees and found (1) that the internal structure of the catego...

visualization of scientific maps enhances the awareness and general recognition of the scientific domains and their structures. it facilitates the study of the existing situation and planning of the future researches as well. the present study sought to discover and generate the scientific map of medicine in iran between 2003 and 2007. it also aimed to determine the most effective medical subje...

Transformation groupoids associated to group actions capture the interplay between global and local symmetries of structures described in set-theoretic terms. This paper examines the analogous situation for structures described in categorytheoretic terms, where symmetry is expressed as the action of a 2-group G (equivalently, a categorical group) on a category C. It describes the construction o...

Grothendieck toposes are studied via the process of taking the associated Sl-enriched category of relations. It is shown that this process is adjoint to that of taking the topos of sheaves of an abstract category of relations. As a result, pullback and comma toposes are calculated in a new way. The calculations are used to give a new characterization of localic morphisms and to derive interpola...