جستجوی مقالات مرتبط با کلیدواژه "investment" در نشریات گروه "فنی و مهندسی"

In recent years, global warming has intensified, and climate change issues have gained great importance. The consequences of this warming trend, along with the growth in population, have caused various proposals to be put forward to develop renewable energy sources to achieve sustainable development. Introduction of pumped storage hydropower (PSH) is a sign of this trend. These plants can store excess energy when demand is low and release it when demand is at its peak. In recent years, the development of these power plants has been followed seriously, and it is expected that investment in such plants will be increasingly high in the future. Due to the importance of meeting climate goals and reducing greenhouse gas emissions, the development of these power plants that produce electricity with minimal carbon emissions is crucial.

The purpose of this study was to investigate the effect of competition intensity on the performance components of the organization (investment and financial dimension, customer, internal process and learning) in the metal industry. The research method is descriptive-survey and is applied in terms of purpose. From 230 senior managers in the field of metal industry in East Azerbaijan province, using Cochran's formula, a sample of 144 people was randomly taken from this community. The research tool was a questionnaire and in order to check the validity and reliability of the questionnaire, in content validity by asking experts and in assessing the validity of the structure, factor analysis of research variables was used. Cronback alpha for all questionnaire questions was 0.902, which confirms the high reliability of the questionnaire. Kolmogorovw-Smirnov test was used to distribute the data and the results showed that all factors in the sample followed the normal distribution. To analyze the hypotheses, regression test was used and SPSS software was used to analyze and process the research data. According to the research findings, the intensity of competition affects the financial dimension, customer dimension, internal processes dimension and the organization's learning processes dimension. The results of regression tables showed that the intensity of competition has the greatest impact on the customer dimension of the organization.

Due to the large volume of exports and imports of goods, developing the country's ports as the country's communication gateways is a need. A comparative economic study of dierent countries shows that sustainable development in these countries is always been accompanied by investment. This fantastic economic phenomenon has reached signicant proportions in the world today. This paper aims to present a model for investing in the container terminal of ports with a system dynamics approach and examine various management policies. The proposed model considered these subsystems: growth and investment, capacity, berth, and access channels. According to the proposed model variables, investment data in the container terminal of Shahid Rajaei port for ten years from 1388 to 1397 is entered into the model, and simulation results are presented. The variables that are evaluated are investment per unit of container, entry tari of ships to port, container storage tari, the tari of transport operators in the container terminal, and depth of berth and access channel. In order to conrm the proposed model, rst, the model is approved by the software, and then some important validation tests are used, and the validity of the proposed model is conrmed. Also, to examine the sensitivity of performance variables to changes in policy parameters, policies adopted in the three areas of service quality, revenue, and the capacity of incoming ships to the port, which are: increase of investment per container unit, reduction of port service tari and increase of berth depth, were implemented on the model in the period of 1397-1406. Finally, the selected policies in each area are implemented simultaneously. The results of the simultaneous implementation of the proposed policies are satisfactory. There is a 24% increase in the operating capacity of the container terminal, a 31% increase in equipment capacity, a 30% increase in revenue, and a 96% increase in the capacity of incoming ships. As a result, by adopting the proposed policy of this research, the performance of the container terminal of Shahid Rajaei port can improve.

Considering the importance of expanding the transportation network and its role in the economy, investment in this sector plays an important role in the growth and prosperity of the country's economy. One of the factors influencing investment in the transportation sector is the exchange rate. To investigate the exchange rate shocks, initially, using Hodrick-Prescott filter, predicted shocks and unexpected positive and negative shocks have been extracted. Further, in specifying the investment equation in the transportation sector, in addition to these shocks, the effect of other variables such as the added value of the transportation sector and the interest rate have been examined. For this purpose, using the auto-regressive distributed lag method (ARDL) as well as the error correction model (ECM), the long-term and short-term relationship between investment in the transportation sector and the factors affecting it during the years 1370-1999 has been evaluated. The results of estimating the short-term and long-term coefficients show that the added value of the transportation sector has a positive effect on the investment in the transportation sector, and the interest rate has a negative effect on the investment in the transportation sector. Also, the results show that the expected exchange rate shocks in the short and long term have a positive effect on investment in the transportation sector. In addition, unexpected positive exchange rate shocks also have a negative effect on investment in the transportation sector, and negative exchange rate shocks also have a positive effect on investment in the transportation sector in the long term.  Also, the results of the asymmetry test of positive and negative exchange rate shocks show that the exchange rate has asymmetric effects on investment in the transportation sector.

Science, along with research and technology, is part of the activities of human societies in which government management and planning play a key role. Government planning, whether annual or multi-year, is based on a long-term vision. The 75-year-old vision was recently released in the United States, which will undoubtedly affect world science. The perspective of science in Iran in upstream documents is very weak or dependent on global growth.We need to have a clearer perspective on the needs of the country in its unique historical context. In this article, I will discuss the history of government planning in science and its roots in Iran during the Ghazan Khan era, to the recent world era, which is the beginning of a serious government planning for science in the world. I will also elaborate on a recent US document outlining a 75-year vision. Finally, I would like to give a basic reflection on how Iran draws its own scientific and research perspective.

Oil revenues make up the bulk of government revenues and directly or indirectly particulary affecting national economic variables, in road transportation. Beside, the road transportation sector because of the major contribution to the movement of goods and passengers by this section in our country, is counted more significantly and Efficient and proper management of road transportation activities can accelerate the growth of this sector. The aim of this study is to evaluate the effect of oil revenues in the resources sector of country`s road transportation section that for this purpose, using OLS model and Eviews computer software, the impact of oil revenues on Providing investment resources in country`s road transportation section during the 1989-2016 is studied. According to the findings, increasing of one percent in country`s oil revenues after a year, real investment in the road transportation sector has increased at a rate of 0.38 percent and also the increase of one percent in added value in country`s road transportation section, Actual investment country`s road transportation section has increased about 1.84 percent after one year.

Given the high risk of investing in economic activities, it is important to recognize investment opportunities and prioritize them. On the other hand, due to resource constraints in building new product (product or service) production capacities, it is necessary to select the appropriate options from the offered opportunities. Therefore, selecting product and service plans is a vital and dynamic decision that poses particular challenges for organizations and companies. The purpose of this study is to investigate the production and service activities of Qeshm Island based on ISIC code to identify investment priorities, taking into account the principles of sustainable development. Accordingly, it has been attempted to analyze the Structural Equation Modeling (SEM) approach and TOPSIS method, considering the indices affecting sustainable investment and development, manufacturing and service activities and designs. And finally identify the production and service priorities of Qeshm Island for investment. The research, applied and statistical population of the study consisted of managers and experts of manufacturing and service sectors active in Qeshm Island and industry and investment sector experts. The results show that rope, twine, multilayer yarn and fishing industries, marine fishing, marine aquaculture, insurance, fish processing and shellfishing, crustaceans and molluscs are the five most preferred investment projects in Qeshm Island.

According to energy economists, increasing efficiency and utilizing renewable energy sources, especially solar energy, is the most effective way to achieve sustainable development goals, provide economic benefits, increase energy security and reduce environmental pollution. In the present study, technical and economic evaluation of the role of investment in the construction of solar power plants (photovoltaics) on sustainable development of Boroujerd city was used using engineering economics method and economic analysis method and RETScreen software. The results show that the assumed photovoltaic power plant has an economic justification with an assumed megawatt period with a return on investment of 4.3 years, an internal rate of return of 28.1%, a net present value of 645.24 billion rials and a profit-to-cost ratio of 9.8. This power plant will produce 2197 MWh of electricity per year (about 0.39% of the total electricity required by the city) and 257 similar power plants are needed to provide the total electricity consumption of Boroujerd city. With the construction of this power plant, the annual emission of greenhouse gases equal to 365.2 barrels of crude oil has not been reduced. Also, this one-megawatt power plant saves 8.5 billion rials per year in fossil fuel, water and greenhouse gas emissions. This amount is equal to 11.7% of the initial construction costs of this power plant, which in addition to selling electricity generated, has positive social effects on society. With the approximate extension of this power plant to a power plant that provides the total consumption of Boroujerd city, 21955.65 billion Rials will be saved in the above cases every year. It is proposed that the government and the Ministry of Energy support the existing solar potentials in the city by providing the necessary funds and facilities for the construction of solar power plants (photovoltaics) with a capacity of one megawatt. Also, by doing this, a lot of savings will be made in the consumption of fossil energy resources, water and greenhouse gas emissions, and the interests of future generations of sustainable energy conservation and development in this city will be realized.

Inflation is a detrimental economic phenomenon and imposes high economic and social costs on societies at high rates, but the main economic damage of inflation is the uncertainty about its future value. Therefore, this study analyzes the relationship and the uncertainty effect of inflation on capital in the road transport sector during the period 1991-1995. In the present study, the economic effects of inflation uncertainty on Investment in the country's road transport sector are investigated. The EGARCH model is used to calculate inflation rate uncertainty. To estimate the main model, self-regression model with distributed interpolation is used and EVIEWS10 software is used to estimate the model and interpret the results. The results show that there is a conditional heteroscedasticity in the inflation rate, which means that there is uncertainty in the inflation rate. Also, the results of the model estimation show that both in the short run and in the long run as the GDP increases, investment in road transport increases and with rising inflation uncertainty, investment in road transport will decrease. Interest rates, both in the short and long run, have a negative impact on investment in the road transport sector. Also with respect to the error correction factor in the ECM model it can be stated that the adjustment rate is appropriate to the equilibrium and long-run value, So that in each period, about 0.36 error of equilibrium is adjusted and in the short run tends to equilibrium and exponentially in the long run.