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  • Publication
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    Effectiveness of primary five English language teachers' feedback practices during reading comprehension lessons: A case study of one primary school in Singapore
    (2025)
    Kalpana Vijaya Lakshmi Balasubramaniam

    The purpose of this study was to investigate the effectiveness of the feedback given by Primary Five English Language teachers during reading comprehension lessons in Singapore. Teachers’ feedback practice during reading comprehension lessons is important because studies show that critical reading skills can be promoted during these lessons especially when feedback is given at the process level. Promoting students’ critical reading skills enables them to be discerning readers which is one of the curricular outcomes in the English Language Teaching and Learning Syllabus (Primary). However, studies show that English Language teachers at the primary level do not give much feedback at the process level.

    The study looked at the effectiveness of feedback provided by four Primary Five English Language teachers during reading comprehension lessons. Specifically, it explored the types of feedback the teachers gave, students’ immediate responses to the feedback received and the factors that influenced the teachers’ formative feedback practices. A single case study approach was used in this study that involved four Primary Five English Language teachers. Data collection involved the use of semi-structured interviews, lesson observations and focus group discussions. Data was analysed using a coding protocol and thematic analysis using Hattie and Timperley's (2007) Model of Feedback as the conceptual framework of study.

    Findings from the study point to a gap between the intention of the feedback given and actual classroom practice. The teachers also lacked clarity regarding how to give effective formative feedback and this had implications on both students’ learning and teachers’ classroom practice. The study suggests looking more closely at feedback literacy, discipline specific feedback, a more focussed approach to teacher professional development where feedback is concerned and encouraging student participation in feedback dialogue.

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    Perspectives of young Singaporeans on the impact of the English language proficiency on job opportunities
    (2025)
    Lai, Clara Si Ying

    English is one of the most widely-spoken languages in the world. In Singapore, English is also the main language of business. Bourdieu (1986) introduced the concept of cultural capital and the three forms that it may take: the embodied state, the objectified state, and the institutionalised state. Specifically, according to Bourdieu, the institutionalised state refers to how the bearer of an academic qualification or professional certificate receives a value-add to his or her cultural capital. As such, does attaining a higher educational qualification in Singapore, which is conducted in the English language, necessarily equate to better cultural capital? Also, if English is the main language of business in Singapore, does a lower grade in the Singapore General Certificate of Education Ordinary Level (GCE O-Level) English examination limit job prospects? Using Bourdieu's theory of cultural capital as its conceptual framework, this research paper seeks to explore the views of three young Singaporeans on how English language proficiency affects their job prospects in Singapore.

    This study employs a case study method to examine the experiences of young adults, who were born and raised in Singapore, in learning English at home and through the local education system, as well as their perspectives of how their English proficiency impacts their jobs. Semi-structured, in-depth interviews were conducted with 3 young Singaporeans between the ages of 21 to 30, who have varying English grades at the Primary School Leaving Examination (PSLE) and / or GCE O-Level English examination level and education levels no higher than at pre-University level (i.e. a Singapore General Certificate of Education Advanced Level (GCE A-Level) certificate, polytechnic diploma or Institute of Technical Education (ITE) certificate).

    Findings showed that while the English language is perceived to be important for interpersonal communication, a good grasp of technical knowledge relevant to the industry is perhaps more important for job opportunities and for the workforce in Singapore. However, at the same time, the research conducted for this paper found that for some jobs, the attainment of specific educational qualifications or a certain benchmark grade is required, and this supports Bourdieu’s concept that institutionalised cultural capital is achieved through educational qualifications. Overall, this study will contribute to research perspectives on the role of English language on socioeconomic status and advancement, impact policymaking within the Singapore education system, as well as add to conversations on upskilling in a globalised, technological world.

  • Publication
    Open Access
    Teacher learning as boundary crossing: A study of interdisciplinary teacher design teams
    (2024)
    Koh, Edith Hsing Dee

    The implementation of interdisciplinary curriculum in schools is often adversely affected by inadequate teacher professional development. One way of addressing this issue is to have teachers engage in collaborative design of interdisciplinary curriculum. Collaborative groups of teachers who are focused on the (re)design of curriculum materials are known as teacher design teams (TDTs). While there is substantial literature describing the professional learning opportunities for teachers who engage in collaborative curriculum design, the examination of such opportunities for teachers collaborating on the design of interdisciplinary curriculum is relatively limited. Therefore, this study seeks to address this gap by examining the learning potential of interdisciplinary teacher design teams.

    The interdisciplinary focus chosen for the TDTs is to teach students to critically read science-based articles in the news. In a researcher-initiated intervention carried out in three secondary schools in Singapore, an English teacher and a science teacher from each school formed a TDT to plan and teach an interdisciplinary lesson that engages students in the critical reading of science-based news. Lesson plans and teaching resources were collaboratively created by the TDTs, and the lessons were carried out within or outside curriculum time. The researcher took on the role of the facilitator in each of the teams.

    As working across disciplines necessarily entails the negotiation of differences between disciplines, boundary crossing was adopted as the theoretical approach to examine teacher learning. With each TDT considered a case, a qualitative case study approach was used to analyse teacher learning from the perspective of the boundaries that they encountered during their collaboration in the TDTs. As the teachers negotiated the boundaries encountered, their attempts at sense-making would give rise to learning opportunities. This process of teacher learning is understood and described using four distinct learning mechanisms of boundary crossing – identification, coordination, reflection and transformation. For each case study, qualitative content analysis of teacher reflection logs, meeting transcripts and interviews identified the types of boundaries and the learning mechanisms that individual teachers went through.

    It was found that the teachers in the TDTs encountered boundaries caused by epistemological differences between subjects, differences in curricular practices of English and science in the classroom, contrasts in collaborative styles and in their expectations of students. The identification, reflection and coordination mechanisms were evident in all three TDTs, and the transformation mechanism was evident in two of the three TDTs. Cross-case analysis revealed that the key boundary objects that facilitated boundary crossing of the teachers were the news articles, the model and framework for critical reading of science-based news, and the lesson plan created by the teachers. Implications of these findings on the practice of designing interdisciplinary collaboration as a source of teacher professional development are discussed.

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    Examining the psychological resilience of service-fit enlistees who participated in Basic Military Training (BMT)
    (2025)
    Lye, Peter Kui Poh

    This quantitative time series study investigates Psychological Resilience as a dynamic construct within the context of service-fit enlistees undergoing Basic Military Training (BMT). Participants were service-fit enlistees from Basic Military School V, totalling 168 individuals with a mean age of 20.46 years. Central to this study is the formulation of the Dynamic Resilience Scale Index (DRSI), based on the core mechanism of resilience. The DRSI addresses fundamental cognitive abilities and emotional processes, proving to be an effective tool for quickly assessing an individual's current resilience by reflecting their situational appraisal and natural emotional responses.

    In academia, the concept of resilience is converging toward a widely accepted definition across the fields of psychology, shifting from adaptation to the ability to withstand or recover from stressors. This evolution simplifies the theoretical construct and highlights two main adaptation trajectories: assimilation and accommodation. Assimilation involves cognitively accepting a situation and harnessing positive mental resources to benefit from it, whereas accommodation involves coping with the situation as it is, potentially with less mental capacity to seek out opportunities. Both trajectories indicate resilience by enabling individuals to withstand or recover from disturbances.

    The DRSI, incorporating cognitive appraisal and emotional reactivity, was formulated and validated using the Primary Appraisal and Secondary Appraisal (PASA) and Perth Emotional Reactivity (PER) scales. Both scales were analysed for reliability and validity through internal consistency tests and Confirmatory Factor Analysis (CFA).

    Repeated Measures ANOVA (RMA) was conducted to analyse the change in resilience throughout the training duration. Significant increases in DRSI were observed from T₁ to T₂, levelling off from T₂ to T₃, possibly due to habitualisation and the completion of knowledge and skill tests by T₃. Hierarchical Multiple Regression and Pearson Correlation were conducted to determine the association between resilience and training outcomes. Although the evaluation of different skills and knowledge showed limited resolution for Training Objectives, a significant correlation was found between resilience and Course Objectives, which are more concerned with the adjustment of individuals to regimentation and their preparedness for future training. This indicates that BMT positively impacts the resilience of enlistees.

    One of the key findings was the significance of positive intensity in contributing to the perception of successful adjustment to regimentation and preparedness for future training. This positive intensity likely stems from the bonding among peers during BMT. Shared difficult experiences activate primeval emotional processes, fostering deep connections among enlistees. Such intense positive emotions enhance learning and social bonding, suggesting the need for interventions that increase opportunities for these experiences, thereby improving future training preparedness.

    In conclusion, the developmental insights into resilience among service-fit enlistees offer the Army an opportunity to systemize resilience training. By equipping individuals to handle stressors better, the Army can cultivate a more effective military force. Beyond military applications, these resilience training insights have broader implications, including reduced healthcare costs, increased productivity, and enhanced general well-being for individuals throughout their lives.

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    Perceived academic expectations, academic self-concept and well-being in full subject based banding
    (2025)
    Nur Izzati Zainudin

    The present study examined the mediating role of academic self-concepts in the associations between perceived parents’ and teachers’ academic expectations and well-being in a sample of secondary school students in Singapore. The study tested this model in both English and Mathematics at two time points, at the start and the end of the academic school year, across ability bands in each of these two subjects (G1 = lower ability; G2 = middle-ability; G3 = higher ability).

    The sample comprised 915 Time-1 and Time-2 matched students. The English sample included 465 students (Mage = 13.99, SDage = 0.95), of which 46.7% were female and 53.3% were male. A total of 28.8% were in Secondary 1, 36.6% in Secondary 2, and 34.6% in Secondary 3. In terms of ability groups, 9.9% were in G1, 36.6% in G2, and 53.5% in G3. For the Mathematics sample, the sample comprised of 450 students (Mage = 13.98, SDage = 0.94, of which 47.6% were female and 52.4% were male participants. A total of 29.6% were in Secondary 1, 36% in Secondary 2, and 34.4% in Secondary 3. The ability group distribution was also comparable, with 10% in G1, 36% in G2, and 54% in G3.

    The three main instruments employed were the Self-Description Questionnaire (SDQII; Marsh, 1990a), the EPOCH measure of adolescent well-being (Kern et al., 2016), and the Teacher and Parents Expectations Scale (Liu & Wang, 2007). Path analysis was used to test the multivariate relationships between predictors and outcome variables; thus, direct, indirect, and total effects could be determined to understand the mediating role played by academic self-concept in the links between students’ perceived academic expectations and well-being.

    The findings suggest that perceived academic expectations both from parents and teachers significantly predict the students’ ASC, which in turn plays a role in several dimensions of well-being. Notably, ASC was found to mediate the relationships between perceived expectations and well-being outcomes. While the mediating role of ASC remained consistent across subjects, the results further varied based on the level of the students’ ability and the subject of study. For example, perceived teachers’ expectations had more significant relationships with wellbeing in Mathematics than in English. Higher-ability (G3) students had the strongest positive well-being outcomes linked to perceived mathematics teachers’ expectations, while middle-ability (G2) and lower-ability (G1) had weaker associations, with G1 students even experiencing a negative outcome in perseverance.

    This study has highlighted the importance of realistic academic expectations by both parents and teachers, coupled with support tailored to meet students’ needs. Besides adding to research, this study has the potential for parents, teachers and the education system to gain insight into and inform interventions for students’ academic self-concepts and overall well-being, given recent changes in education policies in Singapore, namely Full Subject Based Banding.

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    Generative AI and literacy development in the language classroom: A systematic review of literature
    (2025)
    Pragya Chandel
    The past few decades have seen major advancements in educational technology due to rapid development in the field of artificial intelligence (AI). Since the launch of ChatGPT in 2022, Generative Artificial Intelligence (GenAI) in education has gained significant interest amongst educators and several research publications. This dissertation reviews the nascent research on the integration of GenAI in language classrooms to present the current state of the art as well as inform future research on the topic. This paper reports on a systematic review of literature on the use of GenAI for literacy development in the language classrooms. Literacy development includes both language learning outcomes, such as writing and vocabulary learning, as well as multiliteracies outcomes, including engagement with multimodal texts and digital literacies (The New London Group 1996). The systematic review critically examines how GenAI tools are employed by students and educators and their views regarding the integration of these tools in language classrooms. Students’ and educators’ perceptions on the utilisation of GenAI are important, as their attitudes directly influence the integration and effectiveness of these technologies in language classrooms (Hieu and Thao 2024). The methodology of this review involves sourcing studies from databases such as EBSCOhost and Scopus based on tailored inclusion and exclusion criteria aimed at addressing the research questions regarding the impact of GenAI tools on literacy development, multiliteracies outcomes, student and teacher perceptions regarding the use of GenAI tools and the challenges faced due to its integration in language classrooms as reported in the reviewed literature. By reporting these insights, the review aims to inform the development of future technologies which can enhance language teaching and learning experiences and student learning outcomes.
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    Evaluating the effects of the test anxiety survivors education programme on test anxiety and test-taking coping skills across secondary school students
    (2025)
    Teo, Sherann Ler Ying
    The rising prevalence of test anxiety worldwide has raised concerns due to its adverse psychological and academic consequences on students. Past research has shown that multi-modal interventions consisting of cognitive, behavioural, and study coping strategies are the most effective in reducing test anxiety levels in test-anxious students. However, there is relatively limited research on multi-modal test anxiety programmes being conducted as a preventive measure, and most studies have not utilised validated test-taking coping skills measures to evaluate programme outcomes. More research on test anxiety in Singapore is also essential, given that students face elevated levels of academic-related stress within the highly competitive local educational system. Coupled with previous findings that highlighted middle-ability students and adolescents to be vulnerable to test anxiety, the current study strived to address existing research gaps by using validated outcome measures to evaluate the effectiveness of a multi-modal prevention programme, Test Anxiety Survivors Education (TASE), in decreasing test anxiety and increasing test-taking coping skills among middle-ability secondary school students in Singapore. The study recruited 203 Secondary Two to Three students aged 13 to 16 years (M = 14.4, SD = 0.77). Data analyses revealed that TASE had a positive effect on combined outcome variables (test anxiety and test-taking coping skills) as well as individual outcome variables (i.e., reduced test anxiety levels and increased test taking coping skills). Therefore, the current study has successfully demonstrated the effectiveness of TASE as a preventive measure and expanded the knowledge base of test anxiety in Singapore. The findings obtained also have potentially significant implications as they can guide schools in their efforts to help students manage test anxiety and have wide-ranging effects on students’ overall mental well-being. Limitations and directions for future research are discussed as well.
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    Reading instruction for students with mild intellectual disabilities: A study of perspectives and practices of special education teachers in Singapore
    (2025)
    Tor, Veronica Wei Ling
    Reading is a fundamental skill essential for academic success and independent functioning in modern society. Despite its importance, reading instruction for students with intellectual disabilities (ID) has historically been underemphasised due to pervasive beliefs that they have limited learning capabilities. The beliefs, attitudes, and expectations that teachers hold – collectively referred to as teacher conceptions – play a crucial role in shaping their instructional decisions and practices. These conceptions can either empower or inadvertently impede effective literacy learning for students with ID. Yet, there is a notable gap in research exploring how these conceptions manifest among special education (SPED) teachers, especially within the context of Singapore. In addition, there is also a need to seek teacher inputs on the instructional frameworks employed for teaching reading to students with ID in Singapore’s SPED settings. This qualitative study, employing thematic analysis with a phenomenological lens, aimed to address these gaps and offer insights that could enhance the quality of reading instruction for this population. The study, which is exploratory in nature, investigated the conceptions and lived experiences of seven teachers from a SPED school that catered to primary school-aged students with mild ID (MID). Specifically, the research questions sought to examine if teacher conceptions influence their teaching practices and identify the specific curricula, programmes and strategies utilised by teachers in day-to-day SPED classrooms. Using semi-structured interviews and an online questionnaire, the study gathered in-depth insights from these SPED teachers on their reading-related conceptions, instructional choices, and behaviours. The participants, aged between from 29 to 51 years (M = 37.14, SD = 8.17), had a minimum of two years of teaching experience with students with ID. Findings suggested that teachers with more positive views of their students’ capabilities and higher expectations adopted more supportive teaching practices, highlighting the pivotal role of teacher conceptions in the provision of effective reading instruction. The study also uncovered significant inadequacies in the existing instructional framework, including an overly academic curriculum focus, insufficient implementation of research-based practices, and challenges with home-school collaboration. These findings underscore the need to foster positive teacher mindsets and regularly evaluate and refine instructional practices. Also, it is important for schools to strengthen partnerships with parents to enhance the quality of reading instruction for students with MID.
  • Publication
    Open Access
    SingTeach : 2025, Issue 92
    (National Institute of Education (Singapore), 2025-01)
    National Institute of Education (Singapore)
  • Publication
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    Towards an authentic collaborative inquiry model for cultivating data science skills and attitudes: Effects of SPIRE on secondary school students
    (Springer, 2025) ; ;
    Ong, Aloysius Kian-Keong
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    Ker, Chin-Lee
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    Yang, Yuqin
    Preparing the new generation to be data-literate citizens is a pressing challenge, and some explorations have been made to cultivate K-12 students’ data science skills and attitudes. However, there is a lack of instructional models to guide the design of data science programs in K-12 due to its complex and interdisciplinary nature as well as the involvement of diverse communities in its research targeting various audiences. To address this research gap, we proposed an authentic collaborative inquiry model (SPIRE, Stimulate, Practice, Improve and Reflect) that integrates science inquiry procedures (emphasizing students’ hands-on engagement in data science workflow) and the Knowledge Building approach (highlighting students’ continuous and collaborative work on real-world problems and questions). Following the mode, we developed and engaged 67 secondary school students in an out-of-school Data Science program through two cycles. We examined how students’ data science skills, perceived learning and attitudes changed during and after the program. The findings show that the groups of participants could engage in complete data science processes, demonstrating strong skills in identifying variables, aligning data with investigative questions, and interpreting results in their final artifacts. However, they performed relatively poorly in explaining the rationale of the investigation, comprehensive data analysis and considering other factors beyond those included in the investigative questions. Participants perceived learning significantly increased over the inquiry phases, and their perceived data science skills significantly increased after the program. Overall, the results were positive and uncovered skills requiring more support and scaffolding. Future research and practice can further examine how to apply the SPIRE model in K-12 data science education in schools in subjects such as data science, science, and mathematics and study how to enhance the data science skills that students do not perform well.
  • Publication
    Embargo
    Recent advances in photocatalytic H₂O₂ production: Modification strategies of 2D materials and in situ application of H₂O₂
    (Royal Society of Chemistry, 2025)
    Chen, Guangyuan
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    Lin, Chenyang
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    Han, Fangchong
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    Zhang, Haotian
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    Zhou, Shijian
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    Yang, Fu
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    Kong, Yan
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    Environmental pollution and the energy crisis are two major problems that threaten human health and restrict industrial development. Hydrogen peroxide (H2O2) is a green oxidant and clean energy widely used in sterilization, degradation of pollutants and as an energy carrier, which is one of the important strategies to solve these two major problems. In recent years, solar-driven photocatalytic production of H2O2 has gained significant attention and been extensively studied. Two dimensional (2D) material photocatalysts offer promising prospects and distinct advantages for H2O2 production. However, their performance is hindered by challenges such as rapid electron–hole recombination, wide bandgaps, and slow reaction kinetics. Additionally, the high solubility of H2O2 in water and its tendency to decompose easily make it difficult to recover from solutions containing sacrificial agents, thereby restricting its practical applications. To the best of our knowledge, there are few reviews focused on the photocatalytic production of H2O2 using 2D material composite catalysts and its in situ applications. This review provides a detailed discussion of various strategies, including introducing vacancy defects, elemental doping, heterojunction engineering, functionalization and multi-strategy coupling, to improve the photocatalytic performance of 2D material composite photocatalysts. Furthermore, this review highlights the in situ applications of H2O2 produced through photocatalysis in diverse fields, including water purification, sterilization, and pharmaceutical intermediate synthesis. It concludes by outlining the key challenges in the photocatalytic production of H2O2 and proposing practical solutions.
  • Publication
    Embargo
    ESP and listening: Theory, technology and multimodality
    (Wiley, 2025) ;
    Lee, Jean Choong Peng

    In a recent review of English for Specific Purposes (ESP) literature using a bibliometric approach, Hyland and Jiang (2021) traced the interest of the field in the past 30 years (1990–2020) to identify changes in research themes and other bibliographical attributes. The review results of tracking 3500 ESP papers on the Social Science Citation Index showed that frequently studied ESP research themes included professional development, genre, corpus, assessment, curriculum, literacy, and discourse, with the research theme of professional development taking the lead. The research areas that remained constantly in focus over the last three decades were found in writing, instruction, business English, higher education, and the role of community. The review results also showed a shift in the trend of research methods, with methods like discourse, corpus, and genre analysis overtaking the use of questionnaires.

    From these results, we can draw three implications for ESP listening. First, there remains a paucity of listening research in ESP, an observation that Goh (2012) made more than 10 years ago. Since listening is an important communication and learning skill, more research should be encouraged in the teaching and use of this skill. Of special importance is the need for more research into listening in work contexts. Second, the sustained research focus on professional development suggests that pedagogical strategies and learning materials for listening have the potential to grow further through research insights and teaching innovations. In the contemporary digitalized workplace, leveraging technological and multimodal resources for developing listening skills will be an important area for research. Third, the changes in research methods in many areas of ESP would similarly be seen in listening research, as new research questions arise. Of interest and significance is multimodal listening with technology.

    Nonetheless, the study of ESP listening is not complete without an understanding of the general ability to listen in the target language, that is second-language (L2) listening competence (Goh 2012). Yet, there remains limited research and pedagogical interface between general L2 listening and listening for specific purposes, even though they share many fundamental cognitive and functional characteristics. Additionally, the evolving landscape of technology and multimodality in workplace learning and interactions have offered new perspectives on research themes and methods to enhance the scope of research studies, as well as the teaching and learning of ESP listening. In what follows, we draw on theoretical insights about general L2 listening to explain the construct of listening for specific purposes and review research carried out into ESP listening, particularly in the areas of English for Academic Purposes (EAP) and English for Occupational Purposes (EOP) (Belcher 2004; Dudley-Evans and St John 1998; Hutchinson and Waters 1987). We will explore the use of technology and multimodality in ESP listening and their impact on research, teaching and learning. Subsequently, we suggest directions for future research and implications for materials and instruction.

  • Publication
    Metadata only
    Branched poly(terphenyl trifluoroacetophenone piperidone) membranes with dual-proton conductor assist for enhancing fuel cell performance operation in high-temperature
    (Elsevier, 2025)
    Li, Yeyang
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    Xu, Zhipeng
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    Shi, Wenhui
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    Wang, Meng
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    Lin, Zhihao
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    He, Daohui
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    Pan, Yangke
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    Liao, Junbin
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    Shen, Jiangnan
    Achieving an optimal balance between phosphoric acid (PA) uptake and membrane dimensional stability remains a critical challenge for the electrochemical performance and long-term durability of PA-doped membranes in high-temperature proton exchange membrane fuel cells (HT-PEMFCs). Herein, dual proton conductor HT-PEMs were prepared by PA immersion of diethylenetriamine penta-(methylene phosphonic acid) (DETPMP) doped branched poly(triphenyl trifluoroacetophenone piperidone) composite membranes. The unique benzimidazole-functionalized side-chains, combined with the branched rigid twisted polymer backbone, create a robust hydrogen bonding network that facilitates efficient proton transport. By tailoring the polymer structure, the optimized dual-proton conductor membrane, b-PTTP-BIm-DP20, achieves a lower PA uptake (<130 %), while exhibiting outstanding proton conductivity (168.5 mS cm−1), excellent dimensional stability, and sufficient PA retention. The PA-doped b-PTTP-BIm-DP20 based HT-PEMFCs delivers a remarkable peak power density of 835.1 mW cm−2 (200 °C) under backpressure-free and non-humidified. Additionally, the PA-doped b-PTTP-BIm-DP20 membrane demonstrates exceptional durability, with a voltage decay rate of only 0.556 mV h−1 at 160 °C over 100 h of continuous operation. This work highlights the potential of branched polymer designs incorporating dual-proton conductors to achieve a synergistic balance between membrane dimensional stability and electrochemical performance, offering valuable insights for the development of advanced HT-PEMFC membranes.
  • Publication
    Metadata only
    The ‘mound-hollow’ model for solving integer addition and subtraction problems
    (Sriwijaya University, 2025)
    Puspita Sari
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    Dindyal, Jaguthsing
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    Understanding integer operations is a fundamental yet challenging concept for elementary students, often requiring effective visual models to support their comprehension. Despite various instructional models, many students continue to struggle with integer addition and subtraction, particularly when negative numbers are involved. Addressing this gap, this study explores the potential of the mound-hollow model to facilitate students’ understanding of integer addition and subtraction concepts intuitively. This study aimed to examine how three sixth-grade students utilized the mound-hollow model to solve integer addition and subtraction problems. Data were collected from students' written tests and individual interviews conducted after a teaching experiment involving 25 sixth graders in Indonesia. The findings indicate that the mound-hollow model provides a meaningful analogy for solving addition problems of types x+(-y) and (-x)+y (where x>y and x,y are natural numbers) and subtraction problems of types x-(-y) and (-x)-y. All three students successfully employed the model to solve the addition problems by neutralizing every mound-hollow pair and to solve the subtraction problems by creating mound-hollow pairs. Additionally, students demonstrated the ability to justify their solutions and correct errors through the mound-hollow representation. The use of a single mound or hollow to represent larger integers enhanced students’ proficiency in solving integer operations and reinforced their understanding of the relationship between addition and subtraction, such as x-(-y)=x+y and (-x)-y=(-x)+(-y). These findings highlight the effectiveness of the mound-hollow model as an alternative instructional tool for teaching integer operations, providing students with an intuitive framework to construct abstract mathematical concepts. The implications of this study contribute to mathematics education by offering insights into the design of visual models that support conceptual understanding in integer arithmetic.
  • Publication
    Metadata only
    Α‐Fe2O3 nanostructures: Bridging morphology with magnetic and antimicrobial properties
    (Wiley, 2025)
    Krishna, Ambati Mounika Sai
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    George, Nilja
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    Lavanya, Vadupu
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    Kumar, Durgesh
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    Chaurasiya, Avinash
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    Hasibur Rahaman
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    Piramanayagam, S. N.
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    Dalapati, Goutam Kumar
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    Ball, Writoban Basu
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    Ghosh, Siddhartha
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    Chakrabortty, Sabyasachi
    Highly crystalline hematite (α-Fe2O3) nanostructures (NSs) with distinct morphology hold vital significance, not only for fundamental knowledge of magnetic properties but also offering potential applications from biomedical to data storage to semiconductor industry etc. α-Fe2O3 NSs with various shapes were examined to reveal the intrinsic relationship between the shape anisotropy and magnetic properties. In this study, we synthesized different morphologies of α-Fe2O3 NSs, such as spherical, cubic, plate-like, rhombohedral, and hexagonal bipyramid, by controlled hydrothermal method. We analysed the impact of shape and size on the optical and structural characteristics through UV-Visible absorption spectroscopy and X-ray diffraction (XRD). Advanced nanomaterial techniques such as Transmission electron microscopy (TEM) is utilized to explore and confirm the morphology and size of NSs. Subsequently magnetic properties of the α-Fe2O3 NSs, such as magnetic saturation (Ms), coercivity (Hc) and remanent magnetization (Mr), were measured. Careful analysis of magnetic data reveal Morin transition around 200 K for cubic, plate-like & rhombohedral samples, whereas the spherical and hexagonal bi-pyramid samples illustrate the superparamagnetic behaviour in the temperature range of 150 K to 300 K. Finally, we investigated the antibacterial characteristics of NSs against Escherichia coli (E. coli) using microplate reader for monitoring the bacterial growth.
  • Publication
    Metadata only
    Literary phenomenology and the historicity of the lifeworld: Personal and public crisis in Edmund Husserl and Ian McEwan
    (University of Texas Press, 2025)
    This essay argues for the relevance of Edmund Husserl’s transcendental phenomenological method as applied to Ian McEwan’s presentation of private crisis and public history in his novel Lessons. Both Husserl and McEwan advocate for the judicious use of reason and rational inquiry in the direction of politics and culture. I demonstrate how McEwan’s literary representation of consciousness in the context of a life lived amid historical change draws near to a practice of phenomenology, while also probing some difficulties in achieving the neutrality of the transcendental standpoint because of McEwan’s complex evocation of memory, repressed desire, and the uncertain image of the past.