Category Archives: Artificial Intelligence

Long short-term memory prediction of user’s locomotion in virtual reality

Nowadays, there is still a challenge in virtual reality to obtain an accurate displacement prediction of the user. This could be a future key element to apply in the so-called redirected walking methods. Meanwhile, deep learning provides us with new tools to reach greater achievements in this type of prediction. Specifically, long short-term memory recurrent neural networks obtained promising results recently. This gives us clues to continue researching in this line to predict virtual reality user’s displacement. This manuscript focuses on the collection of positional data and a subsequent new way to train a deep learning model to obtain more accurate predictions. The data were collected with 44 participants and it has been analyzed with different existing prediction algorithms. The best results were obtained with a new idea, the use of rotation quaternions and the three dimensions to train the previously existing models. The authors strongly believe that there is still much room for improvement in this research area by means of the usage of new deep learning models.

https://link.springer.com/article/10.1007/s10055-024-00962-9

About Jesús Mayor

Jesús Mayor is since 2019 a full-time lecturer and researcher in Politécnica de Madrid University. He received MS degree in Computer Science (CEU San Pablo, 2013), MS degree in Computer Graphics (U-tad, 2014) and PhD degree in Computer Science (Rey Juan Carlos University, 2020) in Madrid. His studies are focused on computer graphics and data science

CF4J 2.0: Adapting Collaborative Filtering for Java to new challenges of collaborative filtering based recommender systems

CF4J 2.0 is a framework for conducting research experiments based on collaborative filtering. This framework has been designed keeping the scientific community in mind. It includes major features such as a high number of implemented algorithms from the state-of-the-art, several quality measures and parallel execution of the techniques, as well as abstract classes and interfaces to allow developers to extend and customize the library. Furthermore, this new version of the library focuses on the following key features: simple deployment of collaborative filtering experiments, reproducible science, hyper-parameter optimization, data analysis, and openness to the community as an open-source project.

https://doi.org/10.1016/j.knosys.2020.106629

About Jesús Mayor

Jesús Mayor is since 2019 a full-time lecturer and researcher in Politécnica de Madrid University. He received MS degree in Computer Science (CEU San Pablo, 2013), MS degree in Computer Graphics (U-tad, 2014) and PhD degree in Computer Science (Rey Juan Carlos University, 2020) in Madrid. His studies are focused on computer graphics and data science

Optimización del filtrado colaborativo basado en factorización matricial mediante la relevancia de las preferencias de los usuarios

Title Translation: Optimization of collaborative filtering based on matrix factorization through relevance of user preferences

Collaborative filtering based on matrix factorization has become the reference method for the recommendation of products or services due to the high precision of recommendations it generates. The experimental results carried out on the datasets of MovieLens 100K, MovieLens lM and Netflix demonstrate a clear improvement in terms of quality of predictions and recommendations compared to other matrix factorization techniques.

https://search.proquest.com/docview/2388304715

About Jesús Mayor

Jesús Mayor is since 2019 a full-time lecturer and researcher in Politécnica de Madrid University. He received MS degree in Computer Science (CEU San Pablo, 2013), MS degree in Computer Graphics (U-tad, 2014) and PhD degree in Computer Science (Rey Juan Carlos University, 2020) in Madrid. His studies are focused on computer graphics and data science