Diversifying recommendations has shown to be a good means to counteract on choice difficulties and overload, and is able to positively influence subjective evaluations, such as satisfaction and attractiveness. Personal characteristics (e.g., domain expertise, prior preference strength) have shown to influence the desired level of diversity in a recommendation list. However, only personal charac...

Providing very accurate recommendations to end users has been nowadays recognized to be just one of the tasks an effective recommender system should accomplish. While predicting relevant suggestions, attention needs to be paid also to their diversification in order to avoid monotony in the returned list of recommendations. In this paper we focus on modeling user propensity toward selecting dive...

This article mainly concerns projective synchronization (PS) of a modified chaotic finance system. PS with both identical and different scaling factors between two identical chaotic systems is realized. In addition, the PS of modified chaotic finance system with unknown parameters including the unknown coefficients of nonlinear terms is studied by using adaptive control. Numerical simulations a...

We investigate the influence of chiral symmetry which varies along space-time evolution a system, by considering phase transition in nonequilibrium expanding quark-antiquark system. The is described mean field order parameter, whose value solution self-consistent equation, and affects system through force term Vlasov equation. equation gap are solved concurrently continuously for longitudinal b...