درخت حوزه‌های تخصصی

The Iranian Plateau is, in the late 4th millennium B.C., with Mesopotamia and Egypt the birthplace of writing in the World. We propose here to consider the Proto-Elamite (Early Proto-Iranian) and Linear Elamite (Late Proto-Iranian) scripts, not as two different writing systems, but as the same system at two different chronological stages of evolution. Between 3500 and 1850 B.C., the continuous history of writing in Iran may be consequently understood according to 6 distinct phases (I: 3500-3300 B.C.; II: 3300-3000/2900 B.C.; III: 3000/2900-2300 B.C.; IV: 2300-2000 B.C.; V: 2000-1850 B.C.; VI: after 1850 B.C.).

This study investigates the effects of macroeconomic variables on the stock market (stock price index).The effects of macroeconomic variables including global gold and oil price, exchange rate, interest rate, economic growth rate on the Iranian stock market has been investigated by using a non-linear distributed auto-regression model .The results indicated that the relationship between oil price and oil price index in the short term and long term is direct and inverse, respectively. The effect of the exchange rate on the stock price index is direct in the short and long term. In such a way that a long-term positive shock will lead to an increase of 0.87 percent and a negative shock of the exchange rate will lead to a decrease of 8.6 percent of the index. The effect of the positive interest rate shock in the short and long term on the stock price index is insignificant. Meanwhile, the negative shock of the mentioned variables will lead to a 0.12 percent decrease in the stock price index and in the short and long term on The positive shock of the gold price on the stock price index is insignificant.In terms of our results, economic growth has positive relationship with the stock price index. This result is in line with a one percent increase in economic growth, the stock price index will improve by 0.09 percent and with a one percent decrease in the economic growth rate, the stock price index will decrease by 0.1 percent.

The objective of the present study was to examine the relationship among sleep disorders, executive dysfunction, and sluggish cognitive tempo in adolescents utilizing a network approach. The study was performed based on descriptive-correlation method. The population of study contained all the adolescents (ages 12-18 years) in Tehran, Ardebil, Southern Azerbaijan and Western Azerbaijan provinces during 2021-2022 academic year. Data were collected from Two thousand six hundred and fifty-nine adolescents who were recruited through convenience sampling method. Participants completed the Adult Concentration Inventory (Becker et al. 2015), Sleep Disorders Symptom Checklist (Klingman et al. 2017), and Executive Skills Questionnaire-Revised (Strait et al. 2019). The bootnet package in R software used for data analysis. Results showed Sluggish Cognitive Tempo (SCT) was positively and more closely related to Sleep Disorders (insomnia) than Executive Dysfunction. the results showed that the most robust relative bridge connections were Sluggish Cognitive Tempo (SCT) and Plan Management (PM), edge weight = 0.33; Sluggish Cognitive Tempo (SCT) and Insomnia edge weight = 0.26; in addition to the positive bridge connections, a negative robust connection was also recognized between Obstructive Sleep Apnea (OSA) and Emotional Regulation (ER), edge weight = - 0.07. In conclusion, Sluggish Cognitive Tempo (SCT) was positively associated with sleep disorders and executive dysfunction. Future interventions may be developed that emphasize the bridge connections of sleep disorders, executive dysfunction, and sluggish cognitive tempo in adolescents