سعید احمدیان

This study aimed to design a conceptual model of factors affecting consumer safety perception using interpretive structural modeling according to experts and then model approval by home appliance consumers in Mashhad.

The research is descriptive-analytical with a mixed-method approach. The qualitative statistical population includes 20 academic experts and exclusive representatives of repair and warranty of home products, and the quantitative statistical population includes 384 consumers of home appliances. Due to the lack of relevant research background, a combined method was employed; in the cognitive phase, content analysis; in the design phase, interpretive structural modeling technique and structural equations using partial minimum squares were employed in the evaluation phase. Finally, the current status of the enumerated factors from a small statistical population using the t-test of a sample is examined.

The fit indicators confirmed the fit of the theoretical model with the data. The model of perception of safety for home appliance consumers is accepted with 95% reliability.

Product-related factors, customer knowledge and awareness, demographic characteristics, advertising and marketing, sociocultural factors, instructions and labels, seller-related factors, and customer orientation and training affect consumer perception of product safety.

In developing countries with inefficient economic systems and poor tax systems and without mechanisms of citizen participation in the supply of urban costs, the municipal revenue supply system will incline toward unsustainable income resources. Providing sustainable economic resources is one of the most critical challenges for urban management planners and policy-makers. Considering the importance of the role of Tehran metropolis in the urban and national economy, the present study is aimed to identify the complexity of the economic capital acquisition system based on the "competitive advantage of nations" model and with the participation of the Tehran urban management and investment decision-makers and also to identify the environmental determinant factors and extract the cause-effect relationships of the economic capital acquisition system to find the competitive strategies of the development of the economic resources acquisition system in Tehran urban management.

The present paper uses the hybrid fuzzy multi-criteria decision-making approaches, including the two-stage Delphi technique to identify the factors affecting the subsystems of the "competitive advantage of nations" model, the fuzzy AHP to perform the paired comparisons and prioritize the factors, the hybrid fuzzy DEMATEL and SNA (social network analysis) approaches to analyze the network and extract the applied causal relationships. The participants included 12 elites from among the chiefs of the investment offices of the 22 municipal districts of Tehran and the experts introduced by the International Relations & Affairs of Tehran Municipality, who were selected using the purposeful sampling method. The research problem was investigated and analyzed using the fuzzy structure, considering the ambiguity and complexity of the relationships and the available approximate information.

After the review of the literature on the economic capital acquisition in urban management, based on the "competitive advantage of nations" model, initially, four economic resource acquisition systems (production factors, demand conditions, strategy and structure, and supportive industries), the governmental factors, unpredicted events, and 15 subsystems were determined (Fig.1). In the first stage, a total of 97 factors were ranked and refined (filtered) based on the consensus of the elites and using the Likert scale. In the second stage of the Delphi technique, to provide an opportunity for self-revision and assessment of the opinions of others, we again referred to the elites and, subsequently, a total of 65 factors were finally agreed upon and approved based on the elites' consensus. Figure (2) illustrates the Pareto diagram of the identified influential factors. As can be seen in this figure, the production factors with 18 factors ranked first in terms of the factors affecting the economic resource acquisition and the strategy and structure with 17 factors ranked next to it. Figure 1- Economic resource acquisition factors system based on the "competitive advantage of nations" model (res: findings) Figure 2- Pareto diagram of factors affecting the economic resource acquisition based on the "competitive advantage of nations" (res: findings) The assessment of the effectiveness of the systems showed that the external factors, including the government that is out of the control of the capital acquisition system in urban management, had the highest effectiveness with a weight of 33.8%. Next to it, the competition structure and strategy, with a weight of 33%, were the most influential factors in the capital acquisition in Tehran. Subsequently, the factors of production with a weight of 16.8%, the supportive industries related to urban management with a weight of 8.4%, and domestic demand for urban services in Tehran with a weight of 9% exhibited the lowest effectiveness. By investigating the system and subsystems of the model, it can be concluded that although the elites believed that the factors, which were out of the authority of the urban managers, were among the most critical factors affecting capital acquisition, the role of urban managers is the most important influential factor in those areas that are within the authority of the urban managers. In the next stage, in order to find the key factors, considering the results of paired comparisons of the factors, a total of 30 critical priorities, including 32 influential factors, were selected. Afterward, the 32 identified factors were analyzed using the DEMATEL and SNA approaches to extract the cause-effect relationships and extract the network relationships. Subsequently, to depict the relationship network and analyze the relationships between the factors, the total effect matrix was analyzed with a threshold bound in UCINET software based on the degree centrality index, and betweenness centrality index and, thereby, the relationship network was drawn using NETDRAW software. Figure (3) illustrates the cause-effect relationships of the factors affecting the financial resource acquisition in the Tehran metropolis based on the degree centrality index.Figure 3- Relationship network of the factors affecting the economic resource acquisition based on the degree centrality index (res: findings) (the magnitude of the nodes has been set based on the magnitude of the degree centrality)Based on the results of the SNA analysis, using the available expert human forces (P12), the agreement or opposition of the country's political position with the capital acquisition (S23), the probability of the occurrence of war and chaos (O16), and the urban infrastructures in the investment areas (P53) were identified as the causal factors in the network. In addition, the factors of the capital acquisition strategies (S12), the participation of the domestic companies in invested industries (I22), the supply of capital through accessible facilities in specialized industries (P23), the supply of capital through the stock market and OTC facilities for investors (P22), the structure of the demand sector with regard to the needs of the real-person citizens and legal entities of the city (D31) were determined as the most effectible factors. Furthermore, apropos of the factors with a high betweenness centrality, the factors of the capital acquisition strategies (S12), the regional knowledge for foreign investors (P42), the participation of domestic companies in the invested industries (I22), the decision-maker headquarters' convergence and consensus on the spatial marketing strategies (O22), and the innovation in the urban management services-related supplier industries (I12) were identified as the key factors that played a crucial role in the competitive advantage and capital acquisition.

Considering the results of the present study on the development of the economic resources acquisition system based on the "competitive advantage of nations" model in Tehran urban management, the following recommendations are presented by the authors:Developing the government's collaboration with the municipality in the acquisition of investment opportunities in urban management; Coordinating the governmental position and policies with the investment acquisition and applying incentive policies for the private sector and attracting foreign investors; Maintaining security and stability to reduce the risk of war and increase the attractiveness of urban investment; Planning for the development of the infrastructures required for the acquisition of investments in urban services; Supplying the required capital through specialized industrial facilities and capital market facilities and the participation of the companies working in the field of the opportunities of investment of different industries in urban services; Using specialized human forces for the acquisition of investment opportunities in urban management; Compiling the capital acquisition strategies in urban services in an integrated form through strategic planning of urban management; Developing the regional knowledge and accessible specialized data on the investment opportunities in urban management; The convergence and consensus of the decision-maker headquarters on the spatial marketing strategies and urban branding;
Providing the ground for innovations in the urban management services-related supplier industries.

These days, eCommerce has become widely known in the digitalized world, and many businesses have applied this to their business to approach more customers. Extensive literature review establishes that Advancement in E-commerce Infrastructure strengthens the relationship of good management and customer retention. However, the most important part which many companies did not recognize is eCommerce delivery and complexities of the related models. The eCommerce delivery strategy is really important to help the company keep and nurture its loyal customers. Ecommerce delivery refers to all of the services necessary to transfer items ordered online from a retailer to the customer’s delivery location. With a suitable partner, Ecommerce delivery may be reasonable, economical, and quick. In this article, the author tries to review the types of e-commerce models in a simple, eloquent and fluent way.

Product safety affects the health of the citizens of a society and improves the quality of their life. Accordingly, the current study presents a conceptual model for the perception of product safety in home appliance consumers. The research orientation is descriptive-analytical, using a mixed-method approach. In this research, content analysis, interpretive structural modeling technique, structural equations using partial minimum squares were employed. Data library research and exploratory interviews, questionnaires were used. In the cognitive and design phases were statistical population Experts and In evaluation, phase home appliances consumers in Mashhad. Theoretical and convenience sampling methods were employed in this study. The Validity through content Validity, partial minimum squares was measured. Reliability obtained test-retest reliability, intercoder reliability, Cronbach's alpha coefficients, Combined reliability were evaluated. The model of perception of safety for home appliance consumers was accepted with 95% reliability. Designing a conceptual model based on a comprehensive set of significant factors develops the theoretical literature in this field; it presents valuable results for academicians, marketing managers, and producers.

One of the most widely used approaches in the management of Web-based systems, use the online agency and Data related to them . Online web agency, like the heart of a community and is one of the most critical information resources in a society. The importance of this topic in the news military organizations will be doubled. So having a right way and a unique conceptual approach to analyze and categorize the resources, Can provide numerous benefits and assistance to decision-makers within the organization, especially military organizations in carrying out decisions. In this study, firstly we contribute to the study and understanding of the concepts of data mining methods. Secondly, analysis of different methods of text processing must be done from different perspectives So as to identify the positive strategies and strengths of a variety of methods and The Finally, the analysis of news database, so as to uncover information hidden in the data and how to use it. Keywords: Data mining, text mining, News Database, Mixed-Method.

"Judicial independence" is to establish and establish the rule of law and guarantee all civil rights and enjoy all fundamental freedoms, and an independent and efficient judiciary has an important role in establishing justice and guaranteeing the rights of individuals in society and allows the judge to stay away from any pressure. And without influence and fear of any position, even judicial authorities higher than himself, in accordance with the law and conscience and at his discretion to issue a verdict and make a decision. This principle protects the judiciary from attacks by the executive and legislative powers and prevents the interference of other powers. In international law, the application of this principle also plays an important role due to the increasing formation of international courts and arbitrations, and its most important function is to maintain the power of the court to make fair and lawful decisions. On the other hand, the "independence of the legal profession" is a big and very important thing that has made it a national issue. This is one of the manifestations of the credibility of the judicial system, which on the one hand is related to the status of the judicial system of the country and on the other hand to the observance of citizenship rights and preservation of inherent human dignity. In fact, the three main pillars of upholding the rule of law in democratic societies and guaranteeing human rights are judges, prosecutors and lawyers. Therefore, guaranteeing judicial independence in these three basic

In each project, there is always a possibility of occurrence of hazards and risks. Accidents cause many damages such as financial and psychological problems, that may have a negative effect on the workers life. To prevent or reduce the occurrence of incidents, it is necessary to identify and manage the relevant affecting factors. Blasting is one of the events that has frequently led to accidents. In this paper, 13 factors affecting the occurrence of blasting related accidents in the mining and construction projects, have been selected according to the opinion of experts and ranked to identify the most important one. For this purpose, Monte Carlo simulation method and analytical hierarchy process method were implemented. The factors were ranked based on the opinion of 15 experts in this field. Finally, based on the obtained results, inappropriate blasting time, unprofessional personnel were selected as the most important factors. Also, blasting pattern specifications, type of explosive and rock mass characteristics have the least effect in this regard. Validity of the paper outcomes was checked with comparing the real recorded events.

Movement of water in porous media is governed by Laplace equation. In this paper, the optimum location and the angle of inclination of cutoffs in diversion dams have been obtained by using conformal mapping theory to minimize the hydraulic gradient and uplift pressure. Finite element method is used to compare the results of the two methods too. The complex functions are used to analyze the seepage flow beneath the hydraulic structure. Schwarz-Christoffel transformation is one of the conformal mapping techniques. The physical plane beneath the hydraulic structure which is called z- plane and complex potential plane () are conformaly mapped on auxiliary half plane (t) by using this transformation. Finally, the function between z and planes will be obtained and variation of uplift pressure in different points below the structure and variation of hydraulic gradients through downstream will be calculated. The results of the calculations show that the optimum location of the cutoff to minimize the uplift pressure is the heel of the apron and the angle of inclination in this location is decreased by increasing s/b where s and b are the lengths of cutoffs and hydraulic structure, respectively. The value of the angle of the inclination is 60° for s⁄b=1/3. The optimum location of the cutoff to minimize the exit gradients through downstream is the toe of the apron, the values of the angle of inclination for x⁄b≤0.6 are 10°, 30° and 60° respectively. The calculations are done for the other locations along the apron such as upstream and middle of the apron and the solutions are compared with the finite element method too. The comparison of the two methods shows a good consistency between these methods.