Sharif Digital Repository

Today, the importance of scientific collaborations is due to the fact that researchers who jointly publish an article, research connections are formed between them, and as a result, professional learning is obtained. Each of these researchers brings a feature and advantage to the research team, such as mastering a particular topic and its subdivisions, team thinking, and division of labor between them. The importance of these collaborations is doubled when researchers collaborate with each other at the international level, because the networking of researchers through collaboration with colleagues from different countries, especially central and developed countries in science, in addition to... 

Scientific collaboration and the resulting outputs have been always of interest to the scientific community. Specifically, drawing and understanding the elements of scientific collaboration network and identifying its determinants are important step in prescribing and implementing policies in various fields and disciplines of science. Focusing on the Iran context, this study examines the scientific collaborations of faculty members in selected Iranian universities (Sharif University of Technology, University of Tehran, Iran University of Science and Technology, Amirkabir University of Technology, Isfahan University of Technology, and Ferdowsi University of Mashhad). We have drawn the... 

With millions of users worldwide, Twitter has become a tool for reflecting the ideas and concerns of society and social movements in various fields, such as environmental concerns. Since the introduction of Twitter in October 2006, this social network has attracted many users from various fields including academia, politics, and business. Despite the limitations of Twitter users' distributions in terms of age and geography, the analysis of these discourses is important because of the real-time sharing of opinions. In this study, the number of 195,917 tweets with the hashtag Paris agreement, paris accord from 2015 to 2021 have been studied by the snscrape library in Python software with the... 

The common experience of the citizens in metropolitan areas is facing a large volume of private car traffic. Accordingly, the discussion of managing the demand for intra-city travel by private cars has become widespread. Factors influencing the demand and decision of citizens to travel by car, like the demand for any other product, are divided into several groups, including commodity price, related goods price, income, and advertisement. One of the most critical and generalized variables that affect the final price of goods and subsequently affects demand is the costs incurred in the decision and demand for goods. The demand for trips with private cars is associated with the following two... 

Many researchers believe that the production of knowledge is a cumulative process based on past learning, and on the other hand, deepening in a specialized knowledge causes fundamental changes in that field. so to justify the existing relationships, the concept of knowledge spillover is taken into consideration. Knowledge spillover means that technologies can benefit from knowledge originating in other technologies. Our goal in this research is to identify the mechanisms and type of knowledge that can affect the flow between different industries and countries. With the increasing need of the countries of the world for energy and the environmental hazards of fossil energies, an important... 

The purpose of this study is to provide a framework to demonstrate the organizational capabilities of chemical knowledge-based firms and analyze the relationship between these capabilities and exports. For this purpose, by combining 18 different output-based indicators, a model that includes six technological, manufacturing, research and development, marketing, organization and finance capabilities, was designed. Finally, in addition to analyzing the relationship between exports and the level of capabilities of knowledge-based firms, a comparison between the two groups of export and non-export firms and the analysis of these firms' current export situation was made in the period 2015-2018.... 

In this study we investigate the effect of changing household electricity meter from single stroke case to smart meter on electricity consumption. For this purpose, 274111 electricity bill data of 12637 subscribers in Tehran city during the period from 1396 to 1399 has been used. These subscribers are divided into three groups; those who always use single stroke electricity meter or always use smart meter are separately considered as control group. Those who have been changed their electricity meter during the period are considered as treatment group. We use difference in difference method to estimate the effect of changing electricity meter on electricity consumption and average price they... 

Digital technologies are shaping various industries in the era of the 4th industrial revolution, and meanwhile, we are witnessing the faster development of these technologies in the post-Corona period. In the oil industry, digital fields have created a window of opportunity to provide a competitive advantage for reputable oil companies. Realizing the importance of this window of opportunity, the leading oil companies quickly seek to use their capacities in the development of digital technologies such as automation, artificial intelligence, robotics, twins. Digital and fast processing methods are in the context of a digital field to take a step towards digital transformation. National Iranian... 

This research evaluates the fiscal regime of the National Iranian Oil Company (NIOC) and its impact on the company's performance. The main objective of the study is to examine the effect of the financial relationship between the government and NIOC over two time periods: before and after the 1979 revolution. Using a descriptive-analytical method, the research analyzes how changes in the fiscal regime and the government-NIOC relationship have influenced the company's production outputs. The results indicate that the fiscal regime and shifts in government policies have played a crucial role in NIOC’s performance, at times strengthening and at other times weakening its capabilities. The...