مطالب

Examining the importance and influence of financial market companies is one of the main issues in the field of financial management because sometimes the collapse of a stock exchange company can affect an entire financial market. One systematic way to analyze the significance and impacts of companies is to use complex networks based on Interaction Graphs (IGs). There are different methods for quantifying the edge weight in an IG. In this method, the graph vertices represent the stock exchange companies that are connected by weighted edges (corresponding to the extent to which they relate to each other). In this paper, using the GARCH model (1,1) and the Clayton copula, we obtained the lower tail dependence interaction network of the first 52 companies of the Tehran Stock Exchange in terms of average market value, between June 2017 and October 2020. Then, based on the minimum spanning tree of the interaction network, we divided the companies into different communities. Using this classification, it was observed that the companies of the first group (Food Industry) and the second group (Oil Refinery) have the greatest impact on other companies. We also calculated the central indexes of the minimum spanning tree for each company. According to the results, the companies of the third group (Steel) have the highest average in the central indicators.

One of the types of Qur'an studies in recent decades among Orientalists and Muslims is the new researches in the knowledge of new fields of order of the Holy Qur'an. Meanwhile, researches based on symmetric order or reverse order have been able to take a good place in this. The present article examines the coherence of Surah Mubaraka Yusuf by adopting the descriptive-analytical method. This article first introduces the concept of symmetrical order theory and then analyzes the rhetoric of Surah Yusuf. Surah Yusuf is divided into sixteen sections and the relationship between the sections of the surah is established in reverse and presents a general and comprehensive model of the relationship of the sections of the surah with each other . One of the results of this research is the proof of the orderly structure of Surah Yusuf in the form of the theory of symmetrical order.

Knowledge of speech acts and their functions are basic components of pragmatics and the request speech act plays a crucial part in everyday interactions. This study aimed to investigate whether native speakers of English make any differences utilizing the request expressions “would you like” and “would you mind”, their collocations in both spoken and academic contexts and the functional differences caused by the co-text. To this end, the data was retrieved from Corpus of Contemporary American English (COCA). The results revealed that such expressions in the spoken corpus were used more frequently in the transactional context with equal status and as interactional-oriented. However, in the academic corpus, the same expressions were used more frequently in the pedagogical context with the high-low status and as both interactional-oriented and task-oriented. The expression "would you like" was mostly used to give information, whereas "would you mind" was usually used to request an action. These expressions were not used for the purpose of imposition in any of the two contexts. The study revealed that the collocations didn't affect the function of such requests. In fact, it was the collocating words that changed due to the pragmatic functions and the objectives of the speakers. The findings might contribute to understanding of the variations which matter between the request expressions. Teachers and learners might gain insights into how and when they are used and which collocations are more frequent so as to focus more carefully on them and make informed and proper decisions within pedagogical settings.