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This paper uses "prolepsis," a process of reaching into the past to inform present and future practices, to understand 12 English-as-a-second language (ESL) teachers' practices of supporting English language learners (ELLs) through remote teaching during the COVID-19 pandemic from 2020-2021 in British Columbia and to envision some different current and future post-pandemic classroom literacies for diverse learners. Accounts of these ESL teachers' synthetical moments of teaching and supporting ELLs during the pandemic suggest that they had to navigate "new" areas of teaching, including attending to students' social-emotional learning (SEL), connecting with ELL parents, teaching and engaging students via technology-supported instruction, and co-teaching with mainstream teachers, on the basis of limited or no pre-pandemic experience. These insights suggest a need to widen the focus on ESL teachers' knowledge and expertise in applied linguistics and instructional strategies to include classroom literacies in integrating SEL into ESL instruction, adopting interactive, student-driven instructional designs and practices afforded by multimodal technologies, maintaining multiple channels of communication with parents and students, and team-teaching with classroom teachers to provide tailored language support for ELLs. [ABSTRACT FROM AUTHOR]

The anodic electron transfer process is a key factor in determining the electricity production capacity of microbial fuel cells (MFCs). Optimization of anode transfer mechanism in MFCs is essential to improve its electricity production capacity. In this study, we construct three different microbial fuel cells, namely uncoated-MFC(non-packet MFC), coated-MFC and AQ DS(anthraquinone-2,6-disulfonate, AQDS)-MFC, with Rhodospirillum as the catalyst to treat polyether wastewater and study their electron transfer mechanism in regards to the electricity production capacity. Our findings show that during the treatment of polyether wastewater in the anode, microorganisms transfer electrons through both direct contact and electronic shuttle mechanisms, and the electricity generated from the direct contact mechanism is 1.79 times of that from the electronic shuttle mechanism. The performance of AQDSoptimized MFC is further improved with a shorter startup time by 4 h, and an increase of the maximum output current by 50% and electricity production by 39. 5%. [ABSTRACT FROM AUTHOR]

Based on a conversational analysis (CA) of eight videoed EFL lessons from technologyenhanced primary classrooms in a rural suburb of a major city in China, this study examines the nature of technology-assisted practices and their influence on teacher-student interaction in the target language. The analysis revealed that the technology-assisted practices mainly served as an alternative presentation tool to meet a range of traditional pedagogical goals and facilitated minimal spontaneous language use among the students. The findings call for research to explore better pedagogical use of technology to promote students' active language production to truly achieve educational equalization for rural students. [ABSTRACT FROM AUTHOR]

An Eu2+-activated BaSi7N10 cyan phosphor for UV-pumping white light-emitting diodes (LEDs) was successfully synthesized by direct gas reduction and nitridation of the homogeneous oxide precursor of a BaO-SiO2-Eu2O3 system in flowing NH3 and CH4 mixture gas. The phase purity, morphology, chemical composition, and luminescence properties were investigated. The effect of activator concentration on the optical properties of Eu2+ in BaSi7N10 was discussed. The synthesized powders have a nearly pure BaSi7N10 phase and consist of microsized particles. Eu2+-doped BaSi7N10 phosphors absorb strongly in the UV part of the electromagnetic spectrum and exhibit an intense cyan emission band centered at 482-500 nm, which agrees with earlier papers. The optical properties depend greatly on the Eu2+ concentration. Under an UV excitation, BaSi7N10:Eu2+ phosphors doped with a 20 atom % activator give the best luminescent properties, such as high emission intensity, high quantum efficiency, and very low thermal quenching, which suggests that Eu2+-doped BaSi7N10 can be a good green-blue phosphor for UV-pumping white LEDs. [ABSTRACT FROM AUTHOR]