Links between environmental features and developmental outcomes of elite youth athletes: A cross-sectional study within the German talent pathway.

From a holistic perspective, the talent development environment (TDE) influences not only the athletic development but also the development of personal skills as well as the wellbeing of elite youth athletes. Alongside research on the effects of broader environmental features on athlete-related talent development (TD) outcomes, the importance of the closer social climate (i.e., teammates, coaches, support staff) is also emphasized. Therefore, the purpose of this study was to examine the relationship between environmental features, the social climate and athlete-related TD outcomes (I). Additionally, an exploratory analysis was conducted to investigate the role of motivational climate and psychological safety in the relationship between environmental features and athlete-related TD outcomes (II). To this end, 345 German elite youth athletes completed an online survey assessing their perceptions of environmental features, coach-created motivational climate, and psychological safety as well as wellbeing, performance satisfaction, and life skills development. The results revealed that environmental features (especially long-term development focus, effective coach-athlete communication, and the social network), motivational climate and psychological safety were all significantly associated with the outcome variables. These findings underline the significance of environmental features for athlete-related TD outcomes of young talented athletes in German elite youth sports. However, the results indicated that motivational climate and psychological safety did not have significant indirect effects on the relationship between TDE features and athlete-related TD outcomes. Thus, it remains to be questioned if and what other processes influence this relationship.

Examining football players' perceived social support across organizational levels and its links to holistic talent development outcomes in German youth academies.

Sport research highlights the significance of supportive relationships and a psychologically safe environment for promoting desirable talent development outcomes associated with young athletes' performance, wellbeing, and personal development. Against this background, this study aimed to investigate youth football players' perceived availability of different kinds of social support from various stakeholders along the talent pathway in German elite youth academies (1). It further sought to examine the link of such social support perceptions to wellbeing, sport commitment and individual performance satisfaction as relevant development outcomes (2). Finally, the study examined potential mechanism underlying these associations by considering psychological safety as a potential mediator (3). For this purpose, N = 271 youth academy players participating in teams of under-13s, under-15s, and under-17/19s age groups completed a multi-section online survey including the PASS-Q, PsySafety-Check, and WHO-5 as well as subscales of the ASQ (i.e., individual performance satisfaction) and YSCS (i.e., sport commitment). Multivariate analyses indicated significant differences in players' perceptions of social support depending on its kind and provider as well as on players' age group. Further, path models highlighted the importance of emotional and esteem support provided by coaches and management for players' talent development outcomes. However, psychological safety seemed to only play a minor role within those associations, partially mediating the effects of emotional support. Overall, these findings encourage a critical reflection of youth players' social support needs and opportunities to optimally address those within elite youth academies as prominent talent development environments in football.

In vivo characterization of electroactive biofilms inside porous electrodes with MR Imaging.

Identifying the limiting processes of electroactive biofilms is key to improve the performance of bioelectrochemical systems (BES). For modelling and developing BES, spatial information of transport phenomena and biofilm distribution are required and can be determined by Magnetic Resonance Imaging (MRI) in vivo, in situ and in operando even inside opaque porous electrodes. A custom bioelectrochemical cell was designed that allows MRI measurements with a spatial resolution of 50 µm inside a 500 µm thick porous carbon electrode. The MRI data showed that only a fraction of the electrode pore space is colonized by the Shewanella oneidensis MR-1 biofilm. The maximum biofilm density was observed inside the porous electrode close to the electrode-medium interface. Inside the biofilm, mass transport by diffusion is lowered down to 45% compared to the bulk growth medium. The presented data and the methods can be used for detailed models of bioelectrochemical systems and for the design of improved electrode structures.

Straightforward Processing Route for the Fabrication of Robust Hierarchical Zeolite Structures.

Strong hierarchical porous zeolite structures are prepared by a sol-gel method using freeze gelation. Instead of conventional binders in powder form, such as bentonite or kaolin, it has been proven that using a freeze gelation method based on a colloidal silica sol is a more straightforward and easier-to-use-approach in fabricating highly mechanically stable zeolite monoliths. The resulting zeolite slurries possess superior rheological properties (not being pseudoplastic) and show low viscosities. This low viscosity of the slurry enables an increase in the solid content without compromising the extraordinary good flow behavior for casting applications. Additionally, in comparison to conventional powdery binders, zeolite samples prepared by using a colloidal silica sol exhibit a significantly higher mechanical strength. This mechanical strength can be further improved by either increasing the zeolite content or increasing the silica to zeolite ratio. Increasing the zeolite content leads to an increased volumetric adsorption capacity for CO2 as the test gas, resulting from the increased amount of zeolite particles per unit volume. In addition, a higher solid content of the zeolite monoliths leads to higher compression strengths, while showing the same elastic deformation and brittle failure characteristics. In turn, increasing the silica to zeolite ratio does not affect the volumetric adsorption capacity for CO2. Nevertheless, higher silica contents lead to a significant increase in the elastic deformation and absorbed work until failure. Therefore, the proposed processing route based on freeze gelation presents an easy and unique tool to tune the mechanical and gas adsorptive properties of hierarchically structured zeolite monoliths, according to the application requirements.