Problematic online gaming. Is it real and does it matter to our teenagers?

Background: Video games and social media have become an ubiquitous part of our society. Video games have been associated with both positive and negative health consequences. There is a growing body of literature supporting the idea that users can develop problematic interactive media use. We hypothesized that teenagers who screened positive for internet gaming disorder would have correlations with other psychosocial and behavioral concerns when compared to their peers. Methods: An urban cohort of high school students aged 14-18 years completed validated self-reported questionnaires to screen for internet gaming disorder, risk of depression, daytime sleepiness, and quality of life measures. Results: Internet gaming disorder was present in 11.9% of participants. Teens screening positive for problematic online gaming also had significantly elevated risk of depression and a lower quality of life. Conclusion: High school aged students were screened for video game addiction through a self-reported questionnaire. Participants were separated into two groups, those who were identified as meeting criteria for video game addiction and those who did not. The group who screened positive for video game addiction also were at a higher risk for depression and scored lower on a quality-of-life survey. Video game addiction, although likely not causative, may be an indicator of other psychosocial issues faced by high school aged teenagers

Elongated Nanostructured Solar Cells with a Plasmonic Core

In this chapter the effects of the plasmonic response in an elongated nano-scale solar cell with a silver nanoneedle core are explored by measuring photocurrents. The silver nanoneedles formed the support of a conformally grown hydrogenated amorphous silicon (a-Si:H) n-i-p junction around it. A spherical morphology of the solar cell functions as a nano-lens, focusing incoming light directly on the plasmonic silver nanoneedle. We found that plasmonics, geometric optics, and Fresnel reflections affect the nanostructured solar cell performance, depending strongly on light incidence angle and polarization. Besides the plasmonic effects, nano-focusing, and orthogonalization of carrier and photon pathways are simultaneously present at illumination of this structure. In this chapter the photovoltaics characterization techniques and simulations are explained and discussed as well. This work provides valuable insight in solar cell processes in which novel concepts such as plasmonics, elongated nanostructures, and nanolenses are used