Sharif Digital Repository

This study investigates the ovality on the burst pressure of the pipe inside the well. In the last decade, the use of natural offshore oil and gas resources has increased, and as a result, the importance of well integration as a major part of offshore platforms is clear. At the same time, accidents at oil and gas wells have economic and environmental consequences that underscore the importance of ensuring safe operation. Integrity management of fluid pressure wells has been developed to ensure the safe operation of wells. The functional area of integrity management begins with planning, then inspects and then evaluates, and eventually leads to corrective action, and this loop is repeated on... 

This thesis examines the impact of electronic word-of-mouth (e-WOM) on product demand forecasting, specifically in the context of video game consoles. This study examines the importance of emotion-based topics and their impact on demand forecasting at two stages of the product life cycle: pre-launch and post-launch. Using sentiment analysis and topic modeling, this study uncovers product sales drivers and captures evolving consumer sentiment throughout the product lifecycle. By integrating insights from diffusion theory and consumer information search theory, this research contributes to the field of demand forecasting using social media data. This research shows that by using the topics... 

Using the data of the Tehran Stock Exchange, we analyze the characteristics and explanatory factors of major intra-group and out-of-group transactions and test the tunneling hypothesis in intra-group transactions. We find that out-of-group transactions can be largely explained by changes in control or management, firm size, and the type of the firm. However, intra-group transaction properties mostly depend on the difference between the parent company's cash flow rights in the buyer and seller companies. Also, in the final analysis, we conclude that many intra-group transactions are made to change the structure of the business groups, especially when investment companies buy shares of listed...