Interface agents are computer programs that learn users’ preferences to provide them personalized assistance with their computer-based tasks. In order to personalize the interaction with users, interface agents must learn how to best interact with each user and how to provide them assistance of the right sort at the right time. Particularly, an interface agent has to discover when the user need...

Indonesia is likely to face a water crisis due mismanagement of resources, inefficient systems, and weak institutions regulatory organizations. In 2020, most the fresh in was used for irrigation (74%) support agricultural sector, which occupies 30% total land area Indonesia. Of all commodities, rice one major essential as it basic staple food almost every Indonesian. However, 2018, Ministry Pub...

Influential users play an important role in online social networks since users tend to have an impact on one other. Therefore, the proposed work analyzes users and their behavior in order to identify influential users and predict user participation. Normally, the success of a social media site is dependent on the activity level of the participating users. For both online social networking sites...

I thank Dean Martin for his very flattering introduction. I thank the College for bestowing a chair to me and the Mathematics Department for providing a wonderful atmosphere for my work. I thank Don Lewis and my current and former colleagues for their support. I take this opportunity to also thank my family, friends, and collaborators. My mathematical horizon has widened considerably after join...