فهرست مطالب mohsen hajian

According to social science researchers, the family is the smallest and most important social institution, and marriage is the basis of the family and a desirable and Islamic obligation. There are theories that indicate the desire to marry among young people is influenced by economic, social and political factors. The tendency ot marry in the country is considered as one of the important issues and changes in tendency to marry in Hamadan province as one of the provinces of the country were investigated. This research was conducted among the 18-35-year-old youth of Hamadan province in year 2023, and 388 of them were selected for the study using Cochran formula. The collected data were analyzed using Spss software. Results of the research for the tendency to marry indicate that there is a significant relationship between variables such as attachment to parents, individuality in choosing a spouse, idealistic expectations from marriage, having financial resources, believing in the cost- benefit of marriage, socializing with the opposite sex. and there is no connection with the acceptance of gender equality. Finally, the regression results show that the five variables of attachment to parents, idealistic expectation of marriage, having financial resources, belief in the cost-opportunity of marriage, socializing with the opposite sex can account for 60.6% of the variance of the dependent variable (tendency to marriage).

Iran is a country that has experienced an increase in the inflation rate and the Gini coefficient in recent years, leading to the subsequent economic and social repercussions. Theft crime is considered one of the types of social crimes and is seen as a major factor in reducing social welfare. In recent years, theft has increased in Iran, resulting in social crises. This research aims to investigate and analyze the important economic factors contributing to the increase in theft crime in Iran (inflation rate and Gini coefficient) during the years 2012-2023, using the novel Copula approach. The Nash equilibrium with an approximate value of 0.9307 indicates the proportionality between Copula-Marshal-Olkin and the data, while the Nash equilibrium of the Gini coefficient and theft crime with an approximate value of 0.9032 signifies the adherence of Copula-Fisher-Hinzman to the data. The results and findings of the research confirm the influential role of inflation and economic inequality in the increase of theft crime. Therefore, policymakers must pay attention to and implement measures to combat the rise in inflation and economic inequality; because with the reduction of inflation and economic inequality, it will be possible to reduce the crime of theft.

Money laundering is an illegal method by which the obtained economic and financial benefits enter the economic and banking cycle with a legal and unrecognizable appearance. Money laundering is a secondary crime that is created and formed to legalize the primary crime. Money laundering is an organized crime and is carried out by a team with a detailed plan. The crime of money laundering is considered transnational and will not be limited to borders; This crime usually takes place internationally and in countries with money laundering opportunities. During money laundering, illegal money, which is divided into three categories of gray money, black money, and money stained with blood, becomes legal and cannot be tracked by legal authorities. Illegal money enters the financial and economic system after going through the three stages of placement, layering and integration, and it will not be different from legal money. In this research, the concept and stages of money laundering have been investigated with the descriptive research method.

Increasing the share of wind energy in supplying load demand of power grid has created new challenges in the field of power system stability. So that, the stable operation of each units of wind power producer on interaction with grid could be affected by power system instability. Among them we can mention the phenomenon of voltage instability in power system which eventually will lead to voltage collapse if stability controls are not applied. In this paper the impact of reactive power control on improvement of SCIG-based wind farms operation has been studied. With regard to the asynchronous operation of induction machine, the increment of wind power generation will be possible only by absorption of more reactive power. Increasing in the power reactive consumption of induction generator leads to reduction of voltage in point of common connection (PCC) which the wind farm connects to the grid. Ultimately, this process in lack of proper reactive power control can be lead to instability in whole of power system. The conducted studies in this paper are in framework of quasi-static time-domain simulations (QSTDS) and continuation power flow (CPF) algorithm. The results indicate with increment of wind power penetration in power system if the proper support of reactive power is not used, the stable performance of the wind farm will be threatened and caused to over speed of SCIGs. Another task done in this paper is the employment of SVC and STATCOM as a practical solution in improvement of wind farms-based power system stability.