Human development is a complex process driven deep by historical, social and cultural factors, as the Historical- Cultural Theory demonstrates. From The postulates of Vigotski, Leontiev, Elkonin, great thinkers this line thought, we understand play construction factor learning in childhood. aufthors also consider acquisition scientific concepts extremely important for child at moment their inse...

This paper draws on the theory of soft $A$-metric space using points sets and concept spaces. new has great importance as a type generalisation metric spaces since it includes various known In this paper, we introduce examine relations with Then, basic properties these spaces: Hausdorffness, Cauchy sequence, convergence.

The Löwenheim-Skolem theorems say that if a first-order theory has infinite models, then it has models which are only countably infinite. Cantor's theorem says that some sets are uncountable. Together, these two theorems induce a puzzle known as Skolem's Paradox: the very axioms of (first-order) set theory which prove the existence of uncountable sets can themselves be satisfied by a merely cou...

In this paper, using theory of sheets, the deflection of suspended diaphragm has been obtained under uniform and circular loading. This type of diaphragm, unlike other diaphragms, has a central support which is recommended to be used in MEMS applications. The relationship between diaphragm deflection and static analysis of this diaphragm enjoys a great significance in investigating and understa...

Tietze’s syndrome is an inflammatory disorder, which frequently misdiagnosed as the severe life-threating problem. Herein, we reported a case of a 23-year-old male, who complained about the acute chest pain after pneumonia complication. After full examination, he diagnosed as Tietze’s syndrome. Since the precise diagnosis of Tietze’s syndrome has a great importance, our report may raise conscio...

As a kind of mode and stage, Eco-Industrial Parks (EIPs) is of great importance in developing circular economy. Therefore, inquiring deeply into the theory of EIPs and devoting great efforts into its practice constitute primary projects of developing circular economy. This paper analyzes the interrelationship between circular economy and eco-industry, i.e. the intrinsic quality of circular econ...

rain modeling in recent years has been of great importance in water resource management and its function in long term and short term planning, especially its great effect on agricultural economy. to reach to good results box-jenkins model is much more efficient. the writers of this article have used the data collected in tabriz and oroumiyeh stations in a fifty year period and then presented th...