درخت حوزه‌های تخصصی

In this paper, the European option pricing is done using neural networks in the Black-Scholes-Vasicek market. The general purpose of this research is to compare the accuracy of neural network and Black-Scholes-Vasicek models for the pricing of call options. In the sequel, the finite difference method is applied to find approximate solutions of partial differential equation related to option pricing in the considered market. In the design of the artificial neural network required for this research, the parameters of the Black-Scholes-Vasicek model have been used as network inputs, as well as 720 data from the daily price of stock options available in the Tehran Stock Exchange market (in 1400) as the network output. The approximate solutions obtained in this article, which were carried out by two methods of neural networks and finite differences on the Tehran stock exchange based on the daily price of stock options, are shown that neural networks are more accurate method comparing with finite difference. The comparison of pricing results using neural networks with real prices in the assumed market is presented and shown via diagram, as well. In this paper, the European option pricing is done using neural networks in the Black-Scholes-Vasicek market. The general purpose of this research is to compare the accuracy of neural network and Black-Scholes-Vasicek models for the pricing of call options. In the sequel, the finite difference method is applied to find approximate solutions of partial differential equation related to option pricing in the considered market. In the design of the artificial neural network required for this research, the parameters of the Black-Scholes-Vasicek model have been used as network inputs, as well as 720 data from the daily price of stock options available in the Tehran Stock Exchange market (in 1400) as the network output. The approximate solutions obtained in this article, which were carried out by two methods of neural networks and finite differences on the Tehran stock exchange based on the daily price of stock options, are shown that neural networks are more accurate method comparing with finite difference. The comparison of pricing results using neural networks with real prices in the assumed market is presented and shown via diagram, as well.

Financial development has been the main factor for economic development in different countries, and the causal relationship between financial development and economic development is part of the macroeconomic relations that have been examined many times. Yet studies on fishermen's poverty have rarely been done. Many residents of coastal villages are engaged in fishing activities. Small-scale fishing on various coasts in the north of Iran is an important source of employment, income and nutrition for coastal villages. This characteristics and effects have not been well examined. This study has investigated the poverty of Iranian fishermen in Gilan, Mazandaran and Golestan provinces due to changes in financial development.. The study was based on the Threshold Vector Auto Regression (TVAR), between 2000 to 2020. The research results confirm the existence of a nonlinear relationship between financial development and poverty. A significant relationship between financial development and income distribution was also confirmed on the poverty of northern Iranian fishermen.

Understanding the philosophy behind the stucco motifs in the tomb tower of Semiran, Qazvin, can provide insights into the cultural unknowns of northern Iran. This study examines these motifs through library-based and documentary evidence. It appears that the decorative stucco motifs of the Semiran tomb tower can be seen as a continuation of the stucco art styles from the Sasanian period and the early Islamic centuries. This research comparatively studies the remaining motifs and decorations in this tomb tower, seeking to revisit Iranian stucco art and its integration with religious and cultural concepts of northern Iran. Moreover, it aims to examine the artists’ decorative and functional techniques to meet the specific demands of rulers and the aristocracy. Findings indicate that the Semiran Citadel reached its peak of growth and prosperity between the fourth and eighth centuries of the Islamic era. The surviving structures, particularly the tomb towers, significantly reflect the historical prominence of this citadel city during the Islamic period. Additionally, archaeological evidence suggests a flourishing social and cultural life in the central part of the Semiran Citadel City during the Timurid and Safavid eras. Collectively, archaeological and historical evidence suggests the prosperity and expansion of the Semiran Citadel City during the early and middle Islamic periods, especially under the rule of the Musafirids, Seljuks, and Mongol Ilkhanates. Despite its historical significance, the Semiran Citadel gradually lost its vitality and eventually fell into decline and oblivion

Patient satisfaction is a key indicator in evaluating the quality of healthcare services and plays a crucial role in the healing process and patients' perception of the healthcare system. Evidence-Based Design (EBD) is a scientific approach that uses empirical data to optimize healthcare environments. The goals of this research are to promote the principles of designing healthcare centers using an evidence-based approach, thereby improving the quality of space, enhancing patient satisfaction, and accelerating the recovery process. The research method is based on patient-centered principles, aligning with analytical-descriptive research that incorporates field observations, library studies, and data collection through questionnaires from 65 patients hospitalized at Kasra Hospital. These data are analyzed to provide a suitable solution for the design. Data analysis is conducted using the regression and correlation methods. The software used is ASPECT and SPSS 26. According to the obtained results, threshold rate of 6, the average factors of views (3.646), nature and outdoors (3.472), comfort and control (3.913), Legibility of place (3.900), facilities (3.079) and staff (3.594) means that the patients in the hospital are relatively satisfied with the aforementioned factors and the average of privacy and participation (2.769) and interior design (2.896) indicating low satisfaction with the mentioned factors. This study confirms that implementing evidence-based design principles in hospital environments significantly enhances the patient experience, increases satisfaction, and accelerates the healing process.

A house is the origin of many bitter and sweet experiences and the place for the formation of people's personality and identity. One of the wonders of creation is the presence of different needs in men and women. Hence, designers and architects need to review architectural design to create mental comfort in houses, which consist of two different genders. This study aimed to investigate gender differences and their impacts on residential spaces to provide suggestions for better housing designs. For this, primary concepts about gender were first raised, and then relevant theories were examined to describe the interaction of the concept of gender in a residential space. In the end, the feasibility of appropriate designs, which help promote the quality of a residential environment, was measured. The study methodology was qualitative, which described a desirable housing space. According to questionnaire analyses and a survey of 20 men and women, it was concluded that women tended to focus on details and kitchens, whereas men valued living rooms and halls. In sum, it was critical to separate public spaces from private spaces and to give characters to spaces. The goal of this study was to investigate the factors that affect desirable housing spaces and residential-architectural criteria in giving gender to spaces. Findings revealed gender differences stemming from cultural, social, and historical aspects; therefore, people's genders, along with other factors such as age, tastes, and needs, should be considered in designing spaces.