The need for cultural enhancement of mycorrhizal fungi in the cultural of southern pines is discussed. It is suggested that any active program to improve seedling quality through enhancing mycorrhizal colonization can only be justified by demonstrating that more mycorrhizae are better, or different species of mycorrhizae improve seedling performance. Then the increase in performance must be gre...

Convergence hypothesis is one of the results of neoclassical growth model, which has been examined recently. This hypothesis has two forms of absolute and conditional Beta-convergence and implies that regions with lower per capita output have higher per capita growth rates. Since there is no data for regional GDP in Iran, there has been n study to test convergence hypothesis in Iran. Our main c...

in this research work, the impact of user’s behavior on search engine results is discussed. it aims to improvement of search results which leads to the higher satisfaction of users. in other words, we are trying to present a personalized search engine for each user, based on his/her activity and search history. we base our hypothesis that the search history of each user in a specific time frame...

Some philosophers argue that all concepts cannot have the same representational structure, because no single kind of representation has been successful in accounting for phenomena related to formation and application concepts. Here, I against this “appeal cognitive science” by demonstrating different theories concept cohere with interpretations argument. To circumvent threat relativism, should ...