BACKGROUND AND OBJECTIVES: Chronology is one of the novel sciences that has been considered by those in power in different eras. During the Timurid period, Alegh Beyg made considerable efforts to link his family to the Genghis dynasty. For this reason, he wrote a genealogical work, entitled Tarikh al-Arba’, e, the original version of which disappeared, but its adapted remains became known as the Al-Atrak genealogy, of which two copies are available today. The aim of this research is to introduce this literary historical work by looking at the literary, linguistic and content layers of Shajrat al-Atrak and with the help of descriptive stylistic method. Considering the stylistic features of this text and the use of descriptive stylistics at three levels of content, language and rhetoric, the period of reproduction and writing of Shajrat al-Atrak and the nature of its author should be examined. METHODOLOGY: The method is analytical and descriptive and the data are collected through phishing and sampling of the text by repeated study and selection of repetitive options and sometimes mentioning rare and rare cases to approach the answer. Questions helped. FINDINGS: Shajrat al-Atrak is one of the historical-literary texts that by introducing and examining its features, gives researchers the opportunity to study in a text that in addition to the vague historical points of the Mongol and Ilkhanid rule in Iran, also in terms of literature and language. It has outstanding features and can connect part of the communication circles of different historical periods of Persian language, literature and culture of Greater Iran. CONCLUSION: Conclusion: Despite all the author's efforts in the use of literary arrays and Arabic words, and moreover Mongolian Turkish, the prose of Shajrat al-Atrak is still simple and like most historical reference texts. What I like most about its prose writing style is the style of sentence writing in inflection, and the chapter and connection of sentences,In such a way that most sentences, regardless of the place of connection and the chapter, are connected with "wow" in turn, making it difficult for the proofreader to connect the sentences. Mistakes in the use of prepositions, quoting Turkish sentences and poems, and even writing text based on the dialect of the Turks of Parsigo, reinforce the author's suspicion that he is a Turkic speaker and that he is probably a Mongol, and that the author claims that the text Alegh Beyg summarizes and approves. Given the author's devotion to the Sunnis, the text seems to have been reproduced in the period before the Shiite religion became official. Considering the rhetorical and linguistic features of the text and its compatibility with the prose of the Timurid period, it seems that the text belongs to the Timurid period and the author is a relative of the Turkic-speaking Ilkhanids.

In the present study the effect of change in thickness and material of the middle layer in fiber metal laminates (FMLs) with squared section on the energy absorption is investigated. In this work four types of specimens, based on the change in the material of the middle layer, were produced. In order to fabricate FML samples, Glass-epoxy, Carbon-epoxy, polyurethane foam and aluminum 2024 were utilized as the middle layer and aluminum 2024 for inner and outer layers, respectively. The specimens were then subjected to the compression test and their forcedisplacement curves were experimentally obtained. Additionally, the effect of the middle layer thickness on the energy abortion performance was studied by numerical simulation using Ls-Dyna explicit code. The numerical model was initially validated by experiment. In conclusion, it was found that the maximum and minimum efficiency were determined for the FML specimen made of Carbon-epoxy and foam, respectively. Moreover, by changing the middle layer thickness, it was numerically demonstrated that the specimen with three layers of the same thickness yields the best absorption energy capability.

The main purpose of this work is to investigate the effects of different ions produced in plasma focus device (SBUPF1) with the specification of (8.6mF, 25 kV, 2.5kJ) on the Aluminum surface. Also the possibility of ion implantation with the use of this device has been investigated. Argon and Hydrogen+1%Krypton used as working gas. For determining optimum ion density, optimum pressure and operating voltage for Argon as operating gas have been obtained (0.45mbar and 22kV respectively). These parameters for Hydrogen+1%Krypton were 5mbar and 23kV respectively. Irradiated samples have been analyzed with SEM technique for morphological and surface study of samples. The EDX spectroscopy and the SRIM calculations have been done to determine the composition of samples and the penetration depth of the ions in the samples respectively. Melting and surface evaporation effects and generation of cracks were seen in these samples. The intensity of these effects for the samples put in different height from the anode top has been determined. Elemental analysis with EDX technique showed that copper ions penetrated into the samples due to sputtering from anode.