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RISS 인기검색어
- 검색키워드
- 저자 : Haewon Pyo (검색결과 2 건)
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Haewon Pyo 아시아영어교육학회 2020 The Journal of Asia TEFL Vol.17 No.2
Studies of a dictionary app in EFL learners’ composition are limited in language education research. This study investigated this issue in the view of genres. Two groups of 45 EFL undergraduates participated in the study. One group performed two genre-based writing tasks, narrative and argumentative, with the help of a dictionary app and the other without it. The written outcomes were rated on five components of writing such as vocabulary, grammar, content, organization, and communicative achievement. Lexical diversity and lexical sophistication of each text were measured and words written after dictionary look-up were examined in both accuracy of use and parts of speech. The results found that in the dictionary use condition, scores of vocabulary improved significantly in both genres. The diversity of vocabulary appeared to increase with dictionary aid, but not necessarily in sophistication. These changes were generally apparent in the narrative genre. Accuracy analysis revealed up to 60% of errors were detected in words written after dictionary look-up and the probability of error occurrence was noticeable in the argumentative genre, where the ratio of verb use was high. Implications for further studies are suggested.
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A Role for buttonhead in the Early Head and Trunk Development in the Beetle Tribolium castaneum
Jeon, Haewon,O, Jiyun,Jin, Sil,Lim, Jinsung,Choe, Chong Pyo The Korean Society of Developmental Biology 2019 발생과 생식 Vol.23 No.1
The head gap gene buttonhead (btd) is required for the patterning of head segments in the early Drosophila embryo. Mutant phenotypes of btd display a gap-like phenotype in which antennal, intercalary, mandibular and the anterior portion of the maxillary segments are eliminated. In agreement with the phenotypes, btd is expressed in a stripe covering the head segments at the blastoderm stage. During the early phase of the germband extension, btd is expressed in stripes with single segmental periodicity, which is required for the formation of the peripheral nervous system. In contrast to the key role of btd in Drosophila embryonic development, it has been suggested that Tribolium ortholog of btd (Tc-btd) is dispensable for embryonic head development. In order for better understanding of the requirement of Tc-btd in the early Tribolium embryo, we re-analyzed the expression patterns and functions of Tc-btd during embryonic segmentation. Tc-btd is expressed in segmental stripes at the stages of blastoderm and germband elongation. Up to 28.3% of embryos in which Tc-btd is knocked down displays the loss of antennal, mandibular and the pregnathal regions in the head, with abdominal segments being disrupted in the trunk. Our findings suggest that Tc-btd is required for the head and trunk development in the early Tribolium embryo.
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