“pacta sunt servanda” is one of the most fundamental principles in the common law and iranian legal systems, which have been exposed to exceptions in the process of time. these exceptions are part of general doctrine of frustration. iranians exceptions to this rule are named as “ta`azzor” and “ta`assor” rules. doctrine of frustration in common law includes three subdivision theories: “impossibi...

We have devoted an effort to study some nonlinear actions, characteristics of the W-theories, in the framework of the soldering formalism. We have disclosed interesting new results concerning the embedding of the original chiral W-particles in different metrical spaces in the final soldered action, i.e., the metric gets modified by the soldering interference process. The results are presented i...

in this article,we briefly analyse cognitive science and cognitive economics. generally, there are two main theories related to cognitive science and brain performance models. first theory which are inspired by computer and artifical intelligence and second the connectionist models. the connectionist theory is the most prevalent in cognitive science now. hayek and north ,the two nobel laureates...

the term ‘deteriorated texture’ gives all experts as well as ordinary people almost the sameimpression. despite common points in images, the differences put iran cities in different categories based on deteriorated textures. this classification not only has negative effect on the audience from mental point of view but causes various problems for the experts in determining interference method. f...

this study aimed at investigating the effect of blocked, incremental systematic and random contextual interferences on acquisition, retention and transfer of volleyball skills based on changes in a generalized motor program. in fact, this study was conducted to answer this question that whether regular increment of contextual interference level is more effective on learning volleyball service s...

Background In the context of serious concerns over the affordability of healthcare, various authors and international policy bodies advise that strategic purchasing is a key means of improving health system performance. Such advice is typically informed by theories from the economics of organization (EOO). This paper proposes that these theories are insufficient for a full understanding o...

Quantum mechanics and gravitation are two pillars of modern physics. Despite their success in describing the physical world around us, they seem to be incompatible theories. There are suggestions that one of these theories must be generalized to achieve unification. For example, Born's rule--one of the axioms of quantum mechanics--could be violated. Born's rule predicts that quantum interferenc...