http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Professional Identity Tensions in Korean EFL Student Teachers : A Reflective Journal Analysis
Meerbek Kudaibergenov,Kilryoung Lee 아시아영어교육학회 2020 The Journal of Asia TEFL Vol.17 No.2
The present study was carried out in response to the lack of investigation into professional identity tensions of EFL student teachers. The study capitalizes on a corpus of 139 reflective journal entries written by 20 Korean EFL student teachers and analyzes the corpus with a specialist analytics program, Leximancer 4.5. It reveals five professional identity tensions that seem to revolve around maintaining a dual identity (e.g., student vs. professional, L2 learner vs. L2 teacher, etc.), thereby underscoring the complex and conflicting nature of EFL teacher candidates' identities. The findings go some way towards contributing to the existing knowledge of tensions experienced by Korean EFL student teachers in their professional identity development and help us better understand what support should be provided to them by teacher education programs.
Mohammed Saleh,Zelal Isik,Pinar Belibagli,Hudaverdi Arslan,Serpil Gonca,Sadin Özdemir,Nurbolat Kudaibergenov,Alireza Khataee,Nadir Dizge 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.128 No.-
This study aimed to fabricate a novel, low-cost, and environmental-friendly ceramic membrane based onbasalt and leonardite powders via press and sintering methods. The fabricated leonardite basalt ceramicmembrane (LBCM) was coated with silver nanoparticles (AgNPs); to create an antibacterial surface. Thecapabilities of the bare and coated membranes were examined. In this context, water permeabilityreached 554 ± 2.61 and 447 ± 1.21 L/m2hbar for bare LBCM and AgNPs-coated LBCM, respectively. Thefabricated membranes indicated 100% Escherichia coli (E. coli) removal efficiency at a transmembranepressure of 0.5 bar. The solid surface antimicrobial activity of the LBCM and AgNPs-coated LBCM reached26.38% and 100%, respectively. The LBCM and AgNPs-coated LBCM were analyzed for the in-vitro 2,2-diphenyl-1-picrylhydrazyl (DPPH) antioxidant. Accordingly, AgNPs-coated LBCM exhibited higherantioxidant activities than raw LBCM. The scavenging capacity reached 83.91% with AgNPs-coatedLBCM, while only 58.95% was achieved with raw LBCM, indicating that AgNPs-coated LBCM was betterthan bare LBCM from an antioxidant activities perspective. AgNPs-coated LBCM had a deoxyribonucleicacid (DNA) cleavage activity (single-strand DNA cleavage activity at 50 mg/L and double-strand DNAcleavage activity at 100 and 200 mg/L). In contrast, the raw LBCM did not exhibit DNA cleavage activityat any concentration. AgNPs-coated LBCM showed higher antimicrobial activities (minimum inhibitionconcentrations (MICs) were 32 mg/L against Enterococcus faecalis (E. faecalis) and 64 mg/L againstStaphylococcus aureus (S. aureus), Candida tropicalis (C. tropicalis), and Enterococcus hirae (E. hirae)). Thebiofilm inhibition of LBCM and AgNPs-coated LBCM powders was tested against S. aureus andPseudomonas aeruginosa (P. aeruginosa). The maximum S. aureus inhabitations by LBCM and AgNPcoatedLBCM were 60.34% and 99.12%, respectively. The inhabitation of P. aeruginosa increased from52.38% before coating to 96.37% at the end of the coating process. Regarding E.coli microbial cell viabilityinhibition, LBCM powders and AgNPs-coated LBCM powders were found to inhibit E. coli growth by68.35% and 100%, respectively.