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A Study of Formative Assessment in Senior High School English Teaching and Learning
( Sun Baoying ) 현대영미어문학회 2019 현대영미어문학회 추계학술대회 발표논문집 Vol.2019 No.-
Academic assessment has been one of the most important research topics in the field of scientific research in modern education. It is regarded as a mainstream evaluation method. This paper begins to introduce the background information of the study and the purpose of the study. Then, the author raises some questions and does a research in order to answer above questions. The author carried on the questionnaire and interview towards teachers and students. Then the author got the results and did the data analysis. The results of the study indicate that English teachers have some mistakes in evaluation content, evaluation method, evaluation subject and evaluation feedback. Although teachers have realized that they should use formative assessment in the process of English teaching, they still give priority to the traditional way of summative assessment and students’ dominant position in formative assessment has not been shown completely. The author discusses the results, reasons and puts forward some possible solutions, in order to make teachers evaluate students more effectively.
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Progress on fabrication and application of activated carbon sphere in recent decade
Jingming Lan,Baoying Wang,Chunmiao Bo,Bolin Gong,Junjie Ou 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.120 No.-
Activated carbon (AC) has a long history as an adsorbent material in many applications, including heavymetal and toxic gas removal as well as air and water filter applications. Activated carbon sphere (ACS) is aspecial type of activated carbon that has a high compressive strength and low ash content. Coal, asphalt,resins, polymers, lignin, carbohydrates, etc. can be utilized as precursors to prepare ACS using simple carbonizationand activation processes. Various parameters such as carbonization temperature, rising rate oftemperature, activation time, activation temperature, activator, different activation methods, etc. havesignificant effects on the performance and quality of the final product. As the size of ACS decreases, differentpreparation methods were adopted to prepare nano-sized or micron-sized spherical activated carbon. However, regardless of the size and shape of spherical activated carbon, it has a wide range of rolesfor the removal of heavy metals, organic dyes, carbon dioxide, volatile organic chemicals, catalyst carriers,gas and energy storage, chemical protection materials, and blood purification. This article mainlyreviews preparation methods of ACS over the last decade, and its applications and the challenges facedby ACS are discussed.
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Wenkai Zhang,Yanshan Zhan,Xiuxiu Gao,Runming Li,Weiwei Zhu,Hao Xu,Baoying Liu,Xiaomin Fang,Yuanqing Xu,Tao Ding 한국고분자학회 2018 Macromolecular Research Vol.26 No.1
Herein, we report the effect of oxygen functionalities of graphene oxide on thermal activated polymerization and thermal properties of reactive benzoxazine nanocomposites. The numbers of oxygen moieties of graphene oxide (GO) are controlled by hydrothermal reduction. The polymerization behavior of benzoxazine monomer (BA-a) is studied by Fourier transform infrared spectroscopy, differential scanning calorimetry and rheological analysis. It is hypothesized that the GO not only exhibits accelerated effect on the polymerization of the BA-a, but also the oxygen moieties such as carboxyl groups of GO interact with the benzoxazine polymers, leading to several orders of magnitude increase in the chemoviscosity and modulus of composite system. Thermal conductivity of poly(BA-a)/GO composite increases from an initial value of ∼0.27 W/mK to 0.47 W/mK as the loading increases from 1 wt% to 6 wt% (enhancement factor up to 176%). Moreover, the nanocomposites display enhanced initial decomposition temperature and char yields as the degree of GO reduction increases.
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Yingying Ye,Zeqin Fu,Yunfang Tian,Jiji Li,Baoying Guo,Zhenming Lv,Changwen Wu 한국유전학회 2018 Genes & Genomics Vol.40 No.11
Pelagic larval dispersal habits influence the population genetic structure of marine mollusk organisms via gene flow. The genetic information of the clam Gomphina aequilatera (short larval stage, 10 days) which is ecologically and economically important in the China coast is unknown. To determine the influence of planktonic larval duration on the genetic structure of G. aequilatera. Mitochondrial markers, cytochrome oxidase subunit i (COI) and 12S ribosomal RNA (12S rRNA), were used to investigate the population structure of wild G. aequilatera specimens from four China Sea coastal locations (Zhoushan, Nanji Island, Zhangpu and Beihai). Partial COI (685 bp) and 12S rRNA (350 bp) sequences were determined. High level and significant FST values were obtained among the different localities, based on either COI (FST = 0.100–0.444, P < 0.05) or 12S rRNA (FST = 0.193–0.742, P < 0.05), indicating a high degree of genetic differentiation among the populations. The pairwise Nm between Beihai and Zhoushan for COI was 0.626 and the other four pairwise Nm values were > 1, indicating extensive gene flow among them. The 12S rRNA showed the same pattern. AMOVA test results for COI and 12S rRNA indicated major genetic variation within the populations: 77.96% within and 22.04% among the populations for COI, 55.73% within and 44.27% among the populations for 12S rRNA. A median-joining network suggested obvious genetic differentiation between the Zhoushan and Beihai populations. This study revealed the extant population genetic structure of G. aequilatera and showed a strong population structure in a species with a short planktonic larval stage.
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