Adolescents’ perception of gender differences in bullying

Gender norms are normative societal expectations regarding the behaviors of girls and boys that can guide bullying behavior. As early adolescence is a time when peer relations become increasingly important, it is critical to understand the peer relationships of adolescents and what is considered gender non-confirming behavior. Therefore, the aim of this study is to analyze Swedish girls’ and boys’ perception of gender differences in bullying. Twenty-one Swedish adolescents (8 girls and 13 boys) took part in four focus group discussions separated by boys and girls. Data analysis was conducted using qualitative content analysis. “Expectations and needs to fit the norm” emerged as the main category as all categories emerging from the analysis related to boys’ and girls’ understandings of how expectations, strategies, expressions relating to bullying and the need to belong vary depending on gender. Further, girls and boys expressed admiration for each other's ways of coping with bullying indicating that also coping strategies are associated with expectations based on gender. For schools and adults to be better equipped to meet the needs of girls and boys and understand how these needs are expressed, adolescents voices regarding gender related bullying can be seen as helpful tools to develop strategies to work with gender norms and gender expectations. In light of the results of our study, schools may have work to do when it comes to the awareness of norms and attitudes and how they are expressed as these may be a foundation for bullying, among both staff and students

Performance evaluation of the IRIS XL-220 PET/CT system, a new camera dedicated to non-human primates

Background: Non-human primates (NHP) are critical in biomedical research to better understand the pathophysiology of diseases and develop new therapies. Based on its translational and longitudinal abilities along with its non-invasiveness, PET/CT systems dedicated to non-human primates can play an important role for future discoveries in medical research. The aim of this study was to evaluate the performance of a new PET/CT system dedicated to NHP imaging, the IRIS XL-220 developed by Inviscan SAS. This was performed based on the National Electrical Manufacturers Association (NEMA) NU 4-2008 standard recommendations (NEMA) to characterize the spatial resolution, the scatter fraction, the sensitivity, the count rate, and the image quality of the system. Besides, the system was evaluated in real conditions with two NHP with 18F-FDG and (-)-[18F]FEOBV which targets the vesicular acetylcholine transporter, and one rat using 18F-FDG. Results: The full width at half maximum obtained with the 3D OSEM algorithm ranged between 0.89 and 2.11 mm in the field of view. Maximum sensitivity in the 400–620 keV and 250–750 keV energy windows were 2.37% (22 cps/kBq) and 2.81% (25 cps/kBq), respectively. The maximum noise equivalent count rate (NEC) for a rat phantom was 82 kcps at 75 MBq and 88 kcps at 75 MBq for energy window of 250–750 and 400–620 keV, respectively. For the monkey phantom, the maximum NEC was 18 kcps at 126 MBq and 19 kcps at 126 MBq for energy window of 250–750 and 400–620 keV, respectively. The IRIS XL provided an excellent quality of images in non-human primates and rats using 18F-FDG. The images acquired using (-)-[18F]FEOBV were consistent with those previously reported in non-human primates. Conclusions: Taken together, these results showed that the IRIS XL-220 is a high-resolution system well suited for PET/CT imaging in non-human primates