Korean Elementary School Students’ Identity Construction in Their New Communities of Practice

Se ok Shin 한국초등영어교육학회 2017 초등영어교육 Vol.23 No.3

The present study investigates how two Korean elementary school students construct their multiple identities in their new communities of practice while they learn English as an additional language in the United States. Then, it examines which factors affect their identity construction processes during their participation in each community of practice. For these purposes, grounded in a broader conception of sociocultural theory (Vygotsky, 1978, 1981; Wertsch, 1985) and the notion of communities of practice (Lave & Wenger, 1991; Wenger, 1998), a qualitative case study was conducted in a northeastern city of the United States. To secure triangulation, the present study collected the data from multiple sources: classroom observations; interviews with participants, their parents and their ESL class teachers; and the researcher’s field notes. Then, the collected data were analyzed through grounded theory. The present study reveals the following: the participants’ various struggles to be legitimate members in their communities of practice; their identity construction through numerous interactions and negotiations; and factors related to the construction of their multiple identities. Implications related to second language teaching practices and future research are also discussed.

Effect of L2 Learners’ Individual Factors on Their Perceptions of Written Corrective Feedback

Seok Shin 언어과학회 2018 언어과학연구 Vol.0 No.87

The present study investigates the effect of L2 learners’ individual factors on their perceptions of written corrective feedback (WCF) in Korea. Especially, regarding the effect of individual factors, the present study focuses on L2 learners’ different writing proficiency levels and their different study experience in English-speaking countries. For those purposes, the questionnaire data were collected from 106 secondary school L2 learners and analyzed through the Chisquare test and the One-way ANOVA test. Grounded in the effect of two individual factors, the present study shows the following findings: Overall, the participants reveal very positive perceptions of WCF and acknowledge the necessity and significance of WCF for enhancing their writing proficiency; however, their perceptions of specific WCF types and proper timing are various according to each participant’s writing proficiency level and study experience. Implications for L2 education and suggestions for future WCF research are also discussed.

Two Korean Primary School English Teachers’ Identity Reconstruction in a TESOL Program

Seok Shin 한국초등영어교육학회 2018 초등영어교육 Vol.24 No.3

The present study investigated how two Korean primary school English teachers reconstructed their professional identities in a TESOL program as their new communities of practice. In addition, it examined several critical factors which affected the participants’ professional identity reconstruction process through their participations and negotiations in each community of practice. For these purposes, with the notion of communities of practice as a theoretical framework (Lave & Wenger, 1991; Wenger, 1998), a case study using a narrative technique was conducted in a U.S.-based TESOL program. To secure triangulation, data were collected from multiple sources: observations; semi-structured interviews with participants; participants’ reflection papers; and the researcher’s field notes. Then, through grounded theory, data were analyzed critically. The findings of present study reveals the following: the participants’ professional identity construction is a transformative process in their social contexts; the participants’ reconstructed professional identities are affirmatively connected to their future teaching practices in their imagined communities of practice; and several factors, such as the participants’ teaching experiences, their old professional identities in Korea, discourses in their TESOL program and so on, significantly affected their professional identity reconstruction process. Pedagogical implications and suggestions for future studies are also discussed.

무선랜 환경에서 QoS 와 Scalability 를 제공하기 위한 Virtual Multiple Basic Service Set (VMBSS) 기법

손석신(Seokshin Son),유태완(Taewan You),김정훈(Junghoon Kim),권태경(Ted “ Taekyoung” Kwon),최양희(Yanghee Choi) 한국통신학회 2009 한국통신학회 학술대회논문집 Vol.2009 No.11

LPI 차량의 연료압력 레귤레이터 성형해석

박창선(Changsun Park),차용훈(Yonghoon Cha),성백섭(Backsub Sung),이석신(Seokshin Lee),배광석(Kwangsuk Bae),최귀현(Kuy syun Choi),김정주(JungjJoo Kim),김남표(Nampyo Kim),박성호(Sungho Park) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5

Die casting which is extensively known as a necessary technology for lightweight spare parts of automobiles has three central elements of casting equipment, casting technology and die and has had much attention as a technology with the highest coefficient of expansion with increased need of high-quality and high-precision. Therefore, a regulator of LPI automobile receives high internal pressure and works as a central part of the basic fuel supply system according to quality of performance. To produce high-quality casting goods, we need to identify causes of defects and theoretical analyses on physical phenomena occurring in manufacturing. As a result of comparing Types of casting design, it was found that the number of overflow affected flow, flow speed and solidification temperature.

Y₂O₃-BN 복합체의 미세구조 및 내플라즈마 특성

이현규,이석신,김비룡,박태언,윤영훈,Lee, Hyun-Kyu,Lee, Seokshin,Kim, Bi-Ryong,Park, Tae-Eon,Yun, Young-Hoon 한국결정성장학회 2014 한국결정성장학회지 Vol.24 No.3

$Y_2O_3$-BN 세라믹 복합체를 제작하기 위해서, 분말 입도 $3{\sim}10{\mu}m$인 $Y_2O_3$ 분말을 분산한 슬러리에 pH 조절제인 NaOH를 첨가하였으며 결합제로는 PVA, 가소제로는 PEG를, BN 분말과 혼합하고, 분무건조(spray drying)공정을 거쳐 $Y_2O_3$ 혼합 분말을 제조하였다. ${\O}14mm$ 크기의 $Y_2O_3$-BN 시편을 성형하고, $1550^{\circ}C$ 및 $1600^{\circ}C$에서 소결하여 $Y_2O_3$-BN 복합체를 제작하였다. BN 투입량과 소결온도의 변수에 따른 미세구조, 순도, 꺽임강도, 열팽창계수, 밀도, 체적저항, 내플라즈마 특성을 조사하였다. $Y_2O_3$-BN ceramic composites were fabricated from the slurries of yttria powder with average particle size of 3~10 ${\mu}m$. The slurry was fabricated by mixing PVA binder, NaOH for Ph control, PEG, BN powder and $Y_2O_3$ powder. The mixed $Y_2O_3$ powders were obtained by spray drying process from the slurry. The $Y_2O_3$-BN composite specimen was shaped in size of ${\O}14mm$ and then sintered at $1550^{\circ}C$ and $1600^{\circ}C$, respectively. The characteristics, microstructure, purities, densities, bulk resistance, thermal expansion, hardness and plasma resistance of the $Y_2O_3$-BN composites were investigated with the function of BN contents and sintering temperature.

Y₂O₃ 세라믹스의 미세구조 및 플라즈마 저항성

이현규,이석신,김비룡,박태언,윤영훈,Lee, Hyun-Kyu,Lee, Seokshin,Kim, Bi-Ryong,Park, Tae-Eon,Yun, Young-Hoon 한국결정성장학회 2014 한국결정성장학회지 Vol.24 No.6

$Y_2O_3$ 세라믹 소결체를 제작하기 위해, $Y_2O_3$ 분말을 분산한 상태에서 슬러리에 pH 조절제인 NaOH를 첨가하였으며 결합제로는 PVA, 가소제로는 PEG를 첨가하여 열분무 건조 공정을 거쳐 $Y_2O_3$ 과립형 분말을 제조하였다. ${\phi}14mm$ 크기의 $Y_2O_3$ 세라믹 성형체를 성형하고, $1650^{\circ}C$의 온도에서 소결하여 $Y_2O_3$ 세라믹 소결체를 제작하였다. $Y_2O_3$ 소결체의 미세구조, 밀도 및 내플라즈마 특성이 성형압력 및 소결시간에 따라 분석되었다. $Y_2O_3$ 소결체는 $CHF_3/O_2/Ar$ 플라즈마에 노출시켜, $Ar^+$ 이온빔에 의한 물리적반응 식각과 $CHF_3$로부터 분해된, $F^-$ 이온에 의한 화학적반응 식각에 의한 건식 식각 처리가 이루어졌다. 본 연구에서 $Y_2O_3$ 소결체 소결시간의 증가에 따라, 비교적 높은 밀도를 나타내었으며, 내플라즈마 특성이 향상되는 것으로 나타났다. $Y_2O_3$ ceramic specimens were fabricated from the granular powder, obtained by spray drying process from the slurry. The slurry was prepared by mixing PVA binder, NaOH for Ph control, PEG and $Y_2O_3$ powder. The $Y_2O_3$ specimen was shaped in size of ${\phi}14mm$ and then sintered at $1650^{\circ}C$. The characteristics, microstructure, densities and plasma resistance of the $Y_2O_3$ specimens were investigated with the function of forming pressure and sintering time. $Y_2O_3$ specimens were exposed under the $CHF_3/O_2/Ar$ plasma, the dry etching treatment of specimens was carried out by the physical reaction etching of $Ar^+$ ion beam and the chemical reaction etching of $F^-$ ion decomposed from $CHF_3$. With increasing sintering time, $Y_2O_3$ specimens showed relatively high density and strong resistance in plasma etching test.