How Teacher Can Develop Children’s Creativity through Facilitating Possibility Thinking in Chinese Folk Dance Classroom

In recent decades, people has gradually focused on creativity especially in education and society. Through teaching activities, students may be able to use possibility thinking in their classes for developing creativity. Hence, it is important that understanding how teachers can develop children’s creativity by supporting possibility thinking. As a dance teacher, I am looking forward to bringing this knowledge into my teaching. Through a theoretical analysis and experiential combination, this paper aims to explore how teachers can cultivate children’s creativity by facilitating possibility thinking

Analysis on Simulation Experiment of Outburst in Uncovering Coal Seam in Cross-cut

AbstractBased on the criteria of the Hoek-Brown rupture, the stress state of the coal's outburst is analyzed. The establishment of coal mining mechanical model and the critical pressure of the gas outburst are obtained on the basis of catastrophe theory, and then cross-cut outburst process of uncovering coal is classified as outburst breeding, outburst initiation, outburst development and outburst termination. Choosing Luling coal mine's #8 coal seam as a sample, this article relies on the large-scale three-dimensional coal and gas outburst experiment platform of the Key Laboratory of Mine Disaster Prevention and Control of Shandong University of Science and Technology to conduct cross-cut uncovering coal outburst simulation experiment. Through analysis of the surrounding rock stress and gas pressure experimental data, surrounding rock mechanical properties and the change situations when outburst happens in the process of uncovering coal are obtained. The experiments show that: when outburst occurs, the greater changes of crustal stress and gas pressure happen near the outburst mouth; and the stress and gas pressure in front of outburst mouth change significantly more than that at the rear of the mouth

A Proposed Theoretical Model of Discontinuous Usage of Voice-Activated Intelligent Personal Assistants (IPAs)

Based on the contradictory phenomenon of rapid development of Voice-Activated Intelligent Personal Assistants (Voice-Activated IPAs) and discontinuous usage of it, this paper investigates the antecedents of discontinuous usage of Voice-Activated IPAs. We first analyze the topic of Siri usage discussion from Zhihu\u27s Q&A website, and then propose a theoretical model which hypothesized that discontinuous usage of Voice-Activated IPAs are affected by perceived ambiguity, cognitive overload, privacy concern, social embarrassment and lack of integration. It is hypothesized that perceived ambiguity will exert nonlinear impacts on discontinuous usage. Meanwhile, perceived ambiguity is also affected by level of personification in a nonlinear way. Scale development and data collection would be conducted for the future work. It is expected that the results our research could provide theoretical and practical implications for the design of Voice-Activated IPAs

Rapid Detection of SARS-CoV-2 Nucleocapsid Protein by a Label-Free Biosensor Based on Optical Fiber Cylindrical Micro-Resonator

The current global outbreak of coronavirus (COVID-19) continues to be a severe threat to human health. Rapid, low-cost, and accurate antigen detection methods are very important for disease diagnosis. The severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) nucleocapsid protein (N-Protein) is often used as the diagnostic and screening for coronavirus detection. To this end, we propose and experimentally validate a highly sensitive whispering gallery mode (WGM) optical cylindrical micro-resonator (CMR) for bio immunoassay detection. To study the biokinetic process of immunoassay, the surface of the WGM micro-resonator is functionalized with N-Protein monoclonal antibody (N-Protein-m Ab), which led to the specific detection of N-Proteins. The spectral characteristics of the WGM resonance dip were investigated, and it is found that the transmission spectrum of WGM shows a monotonically increasing red-shift as a function of recording time. The WGM red-shift is due to the antibody-antigen reaction and can be used for the analysis of the immunoassay process. The wavelength shift is shown to be proportional to the concentration of N-Protein, which ranges between 0.1 and 100 μg /mL. Finally, different types of samples (concentration of 10 μg /mL of N-Protein) were prepared and tested to simulate the specificity of the sensor in the practical application environment. This method has the merits of a rapid assay, lower expense, easy preparation, and miniaturization, which makes the sensor have the potential for broad applications in the field of biochemistry and biomedical detection

Dual-Crystallizable Silk Fibroin/Poly(L-lactic Acid) Biocomposite Films: Effect of Polymer Phases on Protein Structures in Protein-Polymer Blends

Biopolymer composites based on silk fibroin have shown widespread potential due to their brilliant applications in tissue engineering, medicine and bioelectronics. In our present work, biocomposite nanofilms with different special topologies were obtained through blending silk fibroin with crystallizable poly(L-lactic acid) (PLLA) at various mixture rates using a stirring-reflux condensation blending method. The microstructure, phase components, and miscibility of the blended films were studied through thermal analysis in combination with Fourier-transform infrared spectroscopy and Raman analysis. X-ray diffraction and scanning electron microscope were also used for advanced structural analysis. Furthermore, their conformation transition, interaction mechanism, and thermal stability were also discussed. The results showed that the hydrogen bonds and hydrophobic interactions existed between silk fibroin (SF) and PLLA polymer chains in the blended films. The secondary structures of silk fibroin and phase components of PLLA in composites vary at different ratios of silk to PLLA. The β-sheet content increased with the increase of the silk fibroin content, while the glass transition temperature was raised mainly due to the rigid amorphous phase presence in the blended system. This results in an increase in thermal stability in blended films compared to the pure silk fibroin films. This study provided detailed insights into the influence of synthetic polymer phases (crystalline, rigid amorphous, and mobile amorphous) on protein secondary structures through blending, which has direct applications on the design and fabrication of novel protein–synthetic polymer composites for the biomedical and green chemistry fields