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How has the COVID-19 pandemic changed the home literacy environment, parental engagement, and home-school communications for children and families from culturally and linguistically diverse backgrounds? Data on the experiences of 231 Chinese-Canadian immigrant families with K-2 children revealed that emergency remote learning affected the home literacy environment in complex ways. While some experienced a decrease in mainstream language exposure, others also witnessed a decline in home language use and literacy engagement due to the closure of heritage language schools and absence of grandparents. Parents also differed in their ability, resources, and confidence level in supporting multiliteracies development at home during the pandemic. Moreover, there existed persistent barriers to effective home-school communications despite the affordances of remote learning. The findings have important implications for both immigrant families and mainstream teachers in working collaboratively to support the children's needs in multiliteracies development.

Based on video recordings of five pre-k to grade 4 Chinese dual-language bilingual education (DLBE) teachers' classroom instruction, this article examines the Chinese DLBE teachers' target and first language use and pedagogical moves during their processes of learning to teach in immersion schools in the US. Conversational analyses of classroom interactions show that the teachers' subscribed to target language (TL) only instruction with minimum translanguaging and that teacher-fronted talk in the TL dominated their teaching with low student language output. Although their attention to curriculum-related content varied depending on lesson focus and student TL proficiency, a significant amount of teacher languaging practices was for classroom management. The findings have important implications for Chinese DLBE teachers' preparation and professional development.

While other languages can be used in English-medium instruction (EMI) classrooms, little research has been conducted on the alignment of the use of these languages with the objectives of EMI policy and how bi/multilingual practices such as translanguaging respond to the sociopolitics of EMI classrooms. This case study examined both teachers' and students' language use in EMI classrooms in a multilingual public school in Nepal with minority students whose mother tongues were not Nepali. A critical discourse analysis of two content-area-subject classrooms showed that only Nepali and English translanguaging among students and teachers was identified and mother tongues were consistently excluded. While translanguaging in the two dominant languages could potentially create a flexible space for teaching/learning content knowledge, further interviews with teachers and administrators and a focus-group discussion with students revealed that stakeholders' socially constructed linguistic hierarchy had led to the exclusion of the legitimate place of students' mother tongues in their seemingly 'ordinary' translingual practices. The study also notes content-area teachers' pedagogic under-preparedness to use translanguaging effectively and justly in EMI classrooms, suggesting the need to reconsider the uncritical recommendation of translanguaging without reflecting on local realities and systemic barriers.

Every year, a number of Chinese undergraduates from urban teacher universities are selected as volunteer pre-service teachers to teach in schools located in underdeveloped rural areas. In this qualitative case study, the researchers explore four pre-service teachers' 1-year experience as volunteer educators in rural schools, their communities of practice in the south and west of China, and present their reflections on the challenges, including how their responses (re)shaped their teacher identity. It is found that these pre-service teachers have built their social capital through rural teaching experience, and they have begun to construct their professional teacher identity within that transitional community of teaching practice. The paper contributes to discussions of pre-service teacher education and pre-service teacher identity construction in the context of secondary education in rural China and in other parts of the world.

Metaphors are powerful windows to gain insight into EFL teachers' professional identity constructions. This study examined 33 Chinese EFL student teachers' (STs) self-generated metaphors about teaching before and after their student teaching. Before their teaching practicum experience, they were: (a) optimistic, but had naïve perceptions about their roles, (b) worried about their inadequacy to teach professionally, and (c) anxious about their relationship with cooperating teachers. Post-practicum, we noted (a) increased transformative perceptions about their role, (b) professional knowledge growth, (c) the participants explicated a broad array of challenges of building good student relationships, and (d) the placement-school contexts exert a significant influence on their identity formation. Implications for facilitating EFL student teachers' professional identity (trans)formations during the field experiences are discussed.

Background: Nationally, there is an overwhelming body of research that has revealed a systemwide underpreparedness of both pre- and in-service teachers who are predominantly White and monolingual for teaching English language learners (ELLs) throughout the United States. Despite various responses to address preservice teachers' underpreparedness to teach ELLs, there has been a lack of transformative change in White mainstream preservice teachers' preparation to teach ELLs, due to teacher education programs' indiscriminate, pan-diversity approach to diversity as inclusive of all forms of difference, without explicitly attending to any form of difference such as those confronted by ELLs. This pan-diversity approach endorses generic fairness as sameness practices that may lead to equity traps that shape preservice teachers' patterns of thinking and behavior that hinder the possibilities for creating equitable schools for children of color, including ELLs. Purpose: The widespread underpreparedness of teachers for ELLs suggests an urgent need to reexamine how teacher education programs are providing opportunities for learning about ELL-related knowledge and practice. The goal of this study is to understand 433 preservice teachers' experiences of learning to teach ELLs in a predominantly White teacher education program under a pan-diversity framework. Research Design: A mixed-methods design that includes surveys and interviews was used to address two central research questions: What are preservice teachers' perceptions of learning to teach ELLs in a predominantly White teacher education program that utilizes a pan-diversity framework? How do their opportunities to learn ELL-related content differ across subprogram groups? Quantitative and qualitative data analysis methods were used to analyze the data generated from the survey and interviews. Findings: Triangulation of our quantitative and qualitative data revealed systemic neglect of ELLs in both coursework and field practice in the teacher education curriculum, resulting in underpreparedness among the preservice teachers across the subprograms. The results indicate that the current pan-diversity integration approach has served as an "equity trap" that will preclude the preservice teachers from becoming successful with their future ELLs. Conclusion: This study demonstrates the critical need to eliminate the pan-diversity equity trap to systemically incorporate ELL issues within teacher education to not only transform preservice teachers' deficit thinking about ELLs but also fill their knowledge and skill gaps for working with ELLs. The study has significant implications for teacher education programs to transform ELLs' status from invisibility to rightful prominence in the program.

Starting from the perspective of method principle, system application, and technical characteristics, this paper systematically discussed the research progress of intelligent monitoring and early warning technology concerning fire risk of belt transportation, including inspection technology, distributed optical fiber temperature measurement technology, machine vision technology, wireless communication network technology and data-driven technology. Moreover, the advantages and disadvantages of those monitoring and early warning technologies were discussed. Based on the existing monitoring means of coal mine roadway and the development hotspot of digital intelligence, we proposed a new intelligent monitoring and early warning system for mine belt transportation fire and early warning: “Big-Intelligent-Mobile-Cloud” (big data, intelligent, mobile internet, and cloud computing respectively) coal mine belt fire monitoring system and multi-method coupling, three-dimensional, continuous monitoring system.

The material constitutive equation of 25CrMo4 steel was established through an isothermal compression experiment. First, a thermal compression experiment was carried out with a Gleeble-3500 thermal simulator to study the thermoplastic deformation behaviour of 25CrMo4 steel at various temperatures (850, 950, 1050, and 1150 °C) and strain rates (0.01, 0.1, 1.0, and 10 s−1). The measured true stress–strain curve showed that when the temperature is constant, the flow stress increases with the strain rate, whereas when the strain rate is constant, the flow stress decreases with the temperature. Then, the constitutive model of peak stress of 25CrMo4 was established after analyzing the stress and strain statistics. The model parameters were optimized. The accuracy of the flow stress constitutive model was verified by comparing the flow stress prediction model with the experimental results. The hot forging process of the inner core wheel was numerically simulated based on DEFORM-3D v11 software, and the parameters of this process were formulated by analyzing the metal flow rate and equivalent stress and strain fields. [ABSTRACT FROM AUTHOR]