No abstract

No abstract

No abstract

The present study reports on the effect of learners' positive orientation, perceived teacher and student emotional support on their foreign language classroom anxiety. One hundred and forty-four Chinese L1 second-year university-level participants filled out the Positivity Scale, the Foreign Language Classroom Anxiety Scale, and the Teacher/Student Emotional Support Scale. Hierarchical regression analyses revealed that positive orientation was a significant negative predictor of FL anxiety. The relationship between perceived student support and anxiety ceased to be significant as positive orientation entered the model. Perceived teacher support did not significantly predict FL classroom anxiety at each step of the analysis. The results are discussed in line with previous findings as well as their practical implications for foreign language teaching and learning in Chinese universities.

The massless Dirac electron transport in graphene has led to a variety of unique light-matter interaction phenomena, which promise many novel optoelectronic applications. Most of the effects are only accessible by breaking the spatial symmetry, through introducing edges, p-n junctions, or heterogeneous interfaces. The recent development of direct synthesis of lateral heterostructures offers new opportunities to achieve the desired asymmetry. As a proof of concept, we study the photothermoelectric effect in an asymmetric lateral heterojunction between the Dirac semimetallic monolayer graphene and the parabolic semiconducting monolayer MoS2. Very different hot-carrier cooling mechanisms on the graphene and the MoS2 sides allow us to resolve the asymmetric thermalization pathways of photoinduced hot carriers spatially with electrostatic gate tunability. We also demonstrate the potential of graphene-2D semiconductor lateral heterojunctions as broadband infrared photodetectors. The proposed structure shows an extreme in-plane asymmetry and provides a new platform to study light-matter interactions in low-dimensional systems.