Collaborating with Users in Proximity for Decentralized Mobile Recommender Systems

Typically, recommender systems from any domain, be it movies, music, restaurants, etc., are organized in a centralized fashion. The service provider holds all the data, biases in the recommender algorithms are not transparent to the user, and the service providers often create lock-in effects making it inconvenient for the user to switch providers. In this paper, we argue that the user's smartphone already holds a lot of the data that feeds into typical recommender systems for movies, music, or POIs. With the ubiquity of the smartphone and other users in proximity in public places or public transportation, data can be exchanged directly between users in a device-to-device manner. This way, each smartphone can build its own database and calculate its own recommendations. One of the benefits of such a system is that it is not restricted to recommendations for just one user - ad-hoc group recommendations are also possible. While the infrastructure for such a platform already exists - the smartphones already in the palms of the users - there are challenges both with respect to the mobile recommender system platform as well as to its recommender algorithms. In this paper, we present a mobile architecture for the described system - consisting of data collection, data exchange, and recommender system - and highlight its challenges and opportunities.Comment: Accepted for publication at the 2019 IEEE 16th International Conference on Ubiquitous Intelligence and Computing (IEEE UIC 2019

Annual Report 2018-2019

LETTER FROM THE DEAN I am pleased to share with you the 2018-19 College of Computing and Digital Media (CDM) annual report, highlighting the important work done by our faculty, students, and staff. We’ve said this before, and we’ll say it again: it was a big year. In 2018-19, programs across all three of our schools (Computing, Cinematic Arts, and Design) were ranked nationally. Our faculty were published in dozens of scholarly journals, screened their films over 100 times, and had their work exhibited globally. Student and alumni accomplishments included an Emmy nomination, a first place win in a Department of Energy competition, and features in trade publications--to name just a few. We worked to create new programs (including undergraduate and graduate comedy filmmaking programs in collaboration with The Second City) and continued our work in others (our NSF- funded Medical Informatics Experiences program celebrated its fifteenth year). Our makerspace, the Idea Realization Lab, clocked its 10,000th visit as we made plans to open a new IRL in Lincoln Park. And, we will continue to create the innovative programs and facilities that make us CDM. You can look forward to new programs like industrial design, and new labs that focus on everything from Internet of Things to design industry collaborations. I am proud of our CDM community, and I hope you feel that same sense of pride as you read through this report. David MillerDeanhttps://via.library.depaul.edu/cdmannual/1002/thumbnail.jp