20 research outputs found
Academic Performance and Behavioral Patterns
Identifying the factors that influence academic performance is an essential
part of educational research. Previous studies have documented the importance
of personality traits, class attendance, and social network structure. Because
most of these analyses were based on a single behavioral aspect and/or small
sample sizes, there is currently no quantification of the interplay of these
factors. Here, we study the academic performance among a cohort of 538
undergraduate students forming a single, densely connected social network. Our
work is based on data collected using smartphones, which the students used as
their primary phones for two years. The availability of multi-channel data from
a single population allows us to directly compare the explanatory power of
individual and social characteristics. We find that the most informative
indicators of performance are based on social ties and that network indicators
result in better model performance than individual characteristics (including
both personality and class attendance). We confirm earlier findings that class
attendance is the most important predictor among individual characteristics.
Finally, our results suggest the presence of strong homophily and/or peer
effects among university students
Fast Radiosity Repropagation For Interactive Virtual Environments Using A Shadow-Form-Factor-List
The radiosity method became a very important tool in order to enable photorealistic rendering in virtual reality systems. Based on the geometric description of a scene, the view-independent illumination is computed in a preprocess and colors are assigned to each patch vertex. These virtual environments look very impressive, but any interaction with the scene geometry or its materials results in a time expensive recalculation of the radiosity simulation. This leads to the common phrase: Radiosity scenes are like museums, you may look around, but do not touch anything! In this paper, a new algorithm is presented to overcome this problem. The algorithm is based on the fact that most of the information needed for the radiosity repropagation after any scene modification was already computed during the radiosity preprocess. Therefore, the radiosity method is extended by storing shadow- and form-factor-information in an efficient data structure, the so-called shadow-form-factor-list (SFFL)...