Junior high school students’ perception of physical factors in the classroom based on the Online Q Method

 Students spend a lot of time in the classroom, and the physical environment in the classroom plays an important role in the development of students. It is necessary to scientifically investigate students' views and opinions on the physical factors in the classroom. Due to the COVID-19 pandemic, this study used the Q method online and allowed 40 junior high school students to rank 32 physical factors in the classrooms according to their own perspectives. The results can provide a reference for the reconstruction and construction of classrooms in middle schools and contribute to the design of learner-oriented humanized classrooms

An Investigation of University Students' Classroom Seating Choices

The classroom is crucial for students, and seating position within the classroom can affect students’ performance. This study conducted a survey to investigate the relationship between seating zones and academic performance among 174 university students in Beijing. The results revealed differences in student performance in terms of seating position in small- and medium-sized traditional classrooms. However, the results did not indicate a similar hierarchy of student performance in terms of seating zones in larger traditional classrooms, horseshoe classrooms, collaboration classrooms, and computer classrooms. Additionally, the results revealed that most students considered the layout of a classroom to affect their performance

Analyzing the students’ achievements of Taiwan web-based mathematics competition by data mining

Experts from three different fields will cooperate to explore this study, including e-learning experts from Taiwan; data mining experts from Canada, and Artificial Intelligence experts from Germany. Through this new analysis technique (data mining), new discoveries can be concluded in the field of web-based mathematics competition. Researchers try to explore these relations between different students’ portfolios and achievements of Taiwan Web-based Mathematics Competition. These findings will provide valuable information for instructors, researchers and government. In particular, optimal learning conditions in- and outside the learning scenario can be explored

Information technology for learning: a European students' perspectiv

This study was mainly focused on European university students, in particular on their thinking about IT for learning. Participators came from different European countries and took part in a summer school this year. A total of 21 international students participated in this summer school program. They came from different European countries. The data collection includes a questionnaire survey and interview data. The data were analyzed and common opinions have been extracted. Finally, the authors of the present paper provide six conclusions and refer to university education in European countries to implement an IT integrated instruction. Researchers hope to promote the instructional quality by a well-performed way of IT integration into instruction in high education

Electromagnetic Annihilation Rates of χc0\chi_{c0} and χc2\chi_{c2} with Both Relativistic and QCD Radiative Corrections

We estimate the electromagnetic decay rates of $\chi_{c0}\rightarrow \gamma\gamma$ and $\chi_{c2}\rightarrow\gamma\gamma$ by taking into account both relativistic and QCD radiative corrections. The decay rates are derived in the Bethe-Salpeter formalism and the QCD radiative corrections are included in accordance with factorization assumption. Using a QCD-inspired interquark potential, we obtain relativistic BS wavefunctions of $\chi_{c0}$ and $\chi_{c2}$ by solving BS equations for the corresponding $^{2S+1}L_J$ states. Our numerical result for the ratio $R=\frac{\Gamma(\chi_{c0}\rightarrow\gamma\gamma)}{\Gamma(\chi_{c2} \rightarrow\gamma\gamma)}$ is about $11-13$ which agrees with the update E760 experimental data. Explicit calculations show that the relativistic corrections due to spin-dependent interquark forces induced by gluon exchange enhance the ratio $R$ substantially and its value is insensitive to the choice of parameters that characterize the interquark potential. Our expressions for the decay widths are identical with that obtained in the NRQCD theory to the next-to-leading order in $v^2$ and $\alpha_s$. Moreover, we have determined two new coefficents in the nonperturbative matrix elements for these decay widths.Comment: 16 pages LaTex (2 figures included

Robust estimation of bacterial cell count from optical density

Optical density (OD) is widely used to estimate the density of cells in liquid culture, but cannot be compared between instruments without a standardized calibration protocol and is challenging to relate to actual cell count. We address this with an interlaboratory study comparing three simple, low-cost, and highly accessible OD calibration protocols across 244 laboratories, applied to eight strains of constitutive GFP-expressing E. coli. Based on our results, we recommend calibrating OD to estimated cell count using serial dilution of silica microspheres, which produces highly precise calibration (95.5% of residuals <1.2-fold), is easily assessed for quality control, also assesses instrument effective linear range, and can be combined with fluorescence calibration to obtain units of Molecules of Equivalent Fluorescein (MEFL) per cell, allowing direct comparison and data fusion with flow cytometry measurements: in our study, fluorescence per cell measurements showed only a 1.07-fold mean difference between plate reader and flow cytometry data