condition factor of fish species is very important parameter for understanding fish biology and pathology. for that purpose, we sampled 120 fish individuals from the sava river at four locations (posavina region), where most of them belongs to the cyprinidae family while the others belonging to the families: percidae, siluridae, ameiuridae, esocidae and gobiidae. in total fish sample we found t...

in this paper we introduce condition (e?p) a generalization of conditions (e?), (e) and (p) of acts over monoids and will give a classification of monoids by comparing this condition of their (rees factor) acts with other properties. we give also a criterion of cyclic acts to satisfy condition (e?p).

We demonstrate, by a simple analysis, that cosmological line elements related by scale factor duality also exhibit a duality with respect to the conservation/violation of the Weak Energy Condition (WEC) by the matter that acts as the source in the one-loop β function equations for the metric coupling written explicitly in the form of the Einstein equations. Furthermore, a study of specific pair...

In this paper we introduce condition (E?P) a generalization of Conditions (E?), (E) and (P) of acts over monoids and will give a classification of monoids by comparing this condition of their (Rees factor) acts with other properties. We give also a criterion of cyclic acts to satisfy Condition (E?P).