Sharif Digital Repository

The aim of this research is to investigate the relationship between "knowledge relatedness" and “strategic alliance formation”. The tendency to cooperate has been increasing among companies in recent decades. Strategic alliances are considered one of the main types of cooperation. In a complex environment (especially in knowledge-based industries), there are few companies that prefer to rely only on their knowledge and technical capabilities to achieve innovation goals. It seems that the degree of relatedness of knowledge base between two firms influences their decision to enter into a strategic alliance. Knowledge relatedness is evaluated through the complementarity or similarity of the... 

Entrepreneurial activities have always been considered and investigated due to the economic and social effects they have on societies. In research, in addition to the effects of entrepreneurship at the country level, attention has also been paid to its outputs for entrepreneurs. Since people choose this path according to their goals, values , and personal criteria, it is important and necessary to study people and examine the effects of this activity on them. Well-being is one of the concepts that has been considered in this regard. Well-being in general means experiencing positive emotions, avoiding negative ones, and evaluating life positively. Therefore, well-being is one of the things... 

Auction literature and economic theories advocate common valuation among bidders in mineral rights auctions. In this study, we have tried to examine the assumption of common valuation between bidders in a first price sealed bid auction. It examines the common valuation hypothesis by assuming the information symmetry and the exogenous entry of bidders. The findings of this study suggest that bidders’ valuation in a first price sealed bid auction of natural resources may be private or common value. We use the non-parametric estimation model to find that after the federal government imposed Area-wide Leasing in the Gulf of Mexico, bidders’ valuations changed from private valuation to common... 

The vulnerability of women in the labor market is a well-established fact, but it can be long-lasting when a shock hits them. We examine women’s labor market conditions in a developing country with a substantial set of cultural norms and provide evidence that a job destructive shock persists longer among women. Specifically, probability of remaining unemployed after 20 months is about 50% for women while it is 10% for men. These findings are exacerbated for women who have not worked for more than 5 years and probably have lost their network or are new entrants in the job market. Moreover, women in the private sector, which is a more competitive market in Iran with respect to public jobs, are... 

Wars are destructive and ruin lives. However, when it comes to defending one’s home country and religion, the brilliant aspects of sacrifice are highlighted. The 1980 war between Iran and Iraq, which lasted eight years and cost more than 200,000 lives, is a prime example of such sacrifices. Religions demand sacrifices and create club goods like altruism, cooperation, and effort, which are crucial on the battlefield. Religious institutions, like the Imamzadehs in Iran, strengthen people’s faith and play a significant role in these sacrifices. About eight thousand Imamzadehs in Iran are tombs of the grandchildren of Prophet Muhammad, who left the Arab land seeking a peaceful life among... 

Delay Tolerant Networks are types of mobile Ad-hoc networks, in where because of the high node mobility, low node density and node diversity, there is not full connection between nodes in the whole network; therefore, the probability of existence of end-to-end path between source and destination is low. Due to these properties, message routing in delay tolerant networks has turned to be a challenge, this type of networks work based on the concept of store, carry, forward; for instance, a node may store a message in the buffer for a long time and carry it along until meeting an appropriate contact opportunity. Delay tolerant networks are capable of providing communication services in... 

Intelligent predictive maintenance is recognized as a cornerstone of Industry 4.0, where intelligent software is employed for the early detection of faults and the prevention of unexpected failures. Recent research indicates that the integration of multi-sensor data for fault diagnosis of gearboxes and bearings, using artificial intelligence models, has been successful. However, conventional methods face several challenges. These include an over-reliance on the signal characteristics of a single sensor and the impracticality of applying intelligent learning methods, particularly deep learning, despite their high potential, due to the unavailability of sufficiently large and diverse...