The sustainable development and energy security are currently the priority challenges for the European Union countries. The sustainable and stable development of European economies is closely dependent on the stable access to energy resources. The constant increase of the demand for electricity requires long-term planning of the common European policy. The aim of the article is to analyse the f...

We present the results of a series of computer simulations that examined the impact of winner, loser, and bystander effects on hierarchy formation in fused groups. These effects and their implications for hierarchy structure and aggressive interactions were first examined in small four-member groups. Subsequent to this, the two small groups were fused into a single larger group. Further interac...

Conventional wisdom ties the origin and early evolution of the genus Homo to environmental changes that occurred near the end of the Pliocene. The basic idea is that changing habitats led to new diets emphasizing savanna resources, such as herd mammals or underground storage organs. Fossil teeth provide the most direct evidence available for evaluating this theory. In this paper, we present a c...

Interest groups coordinate to achieve political goals. However, these groups are heterogeneous, and the division of labor within these coalitions varies. We explore the presence of distinct roles in coalitions of environmental interest groups, and analyse which factors predict if an organization takes on a particular role. To model these latent dynamics, we introduce the ego-ERGM. We find that ...

Falcaria vulgaris is a member of Umbelliferae family and is used for treatment of stomach disorders in the folk medicines of the west of Iran. This study was designed to evaluate the gastroprotective effect of F. vulgaris extract on ethanol (%50) induced gastric ulcers in rat. Thirty five young white male rats were divided to five groups (7rats/ group).Three case groups received plant extract (...

Three infinite families of finite abelian groups will be described such that each member of these families has the Rédei k-property for many non-trivial values of k.

the effect of oxygen therapy on postoperative nausea and vomiting     aliakbarzadeh arani z [1] *,gilasi hr [2] , khari arani m [3] ,shouri bidgoli ar [4] , asayesh h [5]     received: 14 apr, 2013 accepted: 15 jun, 2013    abstract  background & aims : postoperative nausea and vomiting (ponv) are the most common complications after surgery which could cause complications and problems for many ...

Objective:  Anchomanes difformis is a member of the plant family Araceae which is used as a diuretic but also has other medicinal applications. This study investigates the dietary effects of A. difformis on the kidneys of adult wistar rats. Materials and Methods: Sixteen rats were used and were weighed, before and after the experiment. All rats were randomly divided into four groups. All groups...