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Author: search.filters.author.Huang HStart date: 2020

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    Adapting to Complexity: Teacher-Student Interactions in Synchronous Online Language Classes through a Dynamic Systems Lens
    (Science Direct, 2025-06-02) Li S; Huang H; Dai C
    Teacher-student interaction is widely recognized as critical to the success of language learning. However, there remains a significant gap in understanding these interactions from a non-linear systems perspective, particularly in online learning environments. This study applies Complex Dynamic Systems Theory (CDST) to investigate the co-adaptive patterns of teacher-student exchanges in online Chinese language classes. By examining real-time interactions and their dynamic nature, we analyzed how interactional patterns evolved and shaped the learning process, using a visualized coding scheme to focus on variations within and between teachers. The study involved 23 adult students studying Chinese as a second language in a Chinese university, with data collected from 12 lessons across a semester. Our analysis identified predominant patterns, such as a frequent reliance on closed questions followed by short responses. While students adjusted their answers based on question complexity, teachers often did not, revealing a lack of adaptability in their questioning techniques. The study calls for further exploration and improved training in adaptive questioning strategies, as this remains a challenge across both online and offline settings. These findings highlight the need for flexible and responsive teaching to meet the increasing demands of dynamic online learning environment.
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    Chiral Lemniscate Formation in Magnetic Field Controlled Topological Fluid Flows
    (Wiley-VCH GmbH, 2025-04-03) Jellicoe M; Gardner Z; Alotaibi AEH; Shoemaker KE; Scott JM; Wang S; Alotaibi BM; Luo X; Chuah C; Gibson CT; He S; Vimalanathan K; Gascooke JR; Chen X; Rodger A; Huang H; Dalgarno SJ; Antunes E; Weiss GA; Li Q; Quinton JS; Raston CL
    High shear spinning top (ST) typhoon-like fluid flow in a rapidly rotating inclined tube within a vortex fluidic device (VFD) approaches homochirality throughout the liquid with toroids of bundled single-walled carbon nanotubes (SWCNTs) twisted into stable chiral lemniscates (in the shape of Figure 8s), predominantly as the R-or S-structures, for the tube rotating clockwise (CW) or counterclockwise (CCW). However, this is impacted by the Earth's magnetic field (BE). Theory predicts 1–20 MPa pressure for their formation, with their absolute chirality determined from scanning electron microscopy (SEM) and atomic force microscopy (AFM) images. Thus, the resultant lemniscate structures establish the absolute chirality of the inner and outer components of the ST flow. These chiral flows and lemniscates can be flipped to the opposite chirality by changing the orientation of the tube relative to the inclination angle of BE, by moving the geographical location. Special conditions prevail where the tangential angle of the outer and inner flow of the ST becomes periodically aligned with BE, which respectively dramatically reduce the formation of toroids (and thus lemniscates) and formation of lemniscates from the toroids formed by the double-helical (DH) flow generated by side wall Coriolis forces and Faraday waves.