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Korean English Teacher's Disempowerment in English-only Classes
Sung-Sam Hwang,Hyo-Sun Seo,Tae-Young Kim 한국사회언어학회 2010 사회언어학 Vol.18 No.1
Hwang, Sung-Sam, SeD, Hyo-Sun, Kim, Tae-Young. 2010. Korean English Teacher's Disempowerment in English-only Classes: A Case Study Focusing on Korea-specific Cultural Aspects. The Sociolinguistic journal of Korea 18(1). In this case study, we have focused on the disempowerment of a Korean English teacher (KET) in English-only classrooms. Six English as a foreign language (EFL) classrooms in a Korean high school were observed and analyzed by using interpretive discourse analysis. Out of the six classes, three representative classrooms were both video- and audio-taped. The results show that the English-only classes could weaken the KETs' power via three mechanisms: (a) calling the KETs' last name for choral greetings at the beginning of the class, (b) students' group solidarity and peer pressure between classmates, and (c) the students' excessively collaborative approach to peer assistance. It is argued that the exclusive English-only instruction disempowers the KETs' status and dismantles their vocational identity. In order to remedy the current situation, within a scaffolding supported by the eclectic use of first language where necessary for effective class management, KETs are empowered and overcome constraints imposed by the limited L2 oral competence of some non-native English teachers.
Tae‑Woon Hong,Sang‑In Lee,Jae‑Hyeok Shim,Myoung‑Gyu Lee,Joonho Lee,Byoungchul Hwang 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.10
An artificial neural network (ANN) model was developed to predict the tensile properties as a function of alloying elementand microstructural factor of ferrite-pearlite steels. The input parameters of the model were composed of alloying elements(Mn, Si, Al, Nb, Ti, and V) and microstructural factors (pearlite fraction, ferrite grain size, interlamellar spacing, and cementitethickness), while the output parameters of the model were yield strength and tensile strength. Although the ferrite-pearlitesteels have complex relationships among the alloying elements, microstructural factors, and tensile properties, the ANNmodel predictions were found to be more accurate with experimental results than the existing equation model. In the presentstudy the individual effect of input parameters on the tensile properties was quantitatively estimated with the help of theaverage index of the relative importance for alloying elements as well as microstructural factors. The ANN model attemptedfrom the metallurgical points of view is expected to be useful for designing new steels having required mechanical properties.
삼나무 (杉) 내한성 (耐寒性) 품종 선발에 관한 연구
홍성각,조태환,황증 ( Sung Gak Hong,Tae Hwan Cho,Jeung Hwang ) 한국산림과학회 1981 한국산림과학회지 Vol.51 No.1
This study was designed to know difference in degree of dehardening and rehardening respectively by artificial high and low temperature treatments among different clonal seedlings and seedlings from different seed sources of Cryptomeria japonica which have been grown under the cold areas in Japan and Korea. High temperature treatment was done with 15 to 20℃ under 100% relative humidity for one to nine days and low temperature treatment was carried with -7℃ for one to three days. Occasionaly, high temperature treatment was combined and followed by low temperature treatment. The ability of stem section to delay dehardening by high temperature treatment and/or to hasten rehardening by low temperature treatment was used as an indicator of adaptability under extreme temperature fluctuation in nature. Clones and seedlings from different seed sources which showed greater freezing resistance than others after artificial high and/or low temperature treatments were selected over two to three time periods: early winter, mid winter and early spring in 1977 to 1980. These were Seoul #7, and #9, Namboo #3, and #4, Sung-Kang #11, Chung-Sam #8 and Huek-Suk #9. These selected seedlings might have survival advantage to withstand early and late frost damage, especially the critical frost damage of the basal stem, since it was known to be induced by lowering freezing resistance of the basal part when exposed to the high temperature near the ground during the day. Large variation in freezing resistance and degree of dehardening and rehardening was found among clonal or seed sources and among individuals within a seed source, but was not related to the difference in climatic conditions where the parent trees was selected. These indicated the possibility of future breeding work for more cold resistant family of Cryptomeria japonica.
Sung-Chan Gwark,Shin Hwang,Ki-Hun Kim,Yong-Joo Lee,Kwang-Min Park,Chul-Soo Ahn,Deok-Bog Moon,Tae-Yong Ha,Gi-Won Song,Dong-Hwan Jung,Gil-Chun Park,Sung-Gyu Lee 한국간담췌외과학회 2012 한국간담췌외과학회지 Vol.16 No.4
Backgrounds/Aims: Gallbladder carcinoma (GBCa) T2 lesions are considered to be advanced tumors showing diverse features in tumor extent. When this T2 lesion does not involve the cystic duct and there is no evidence of lymph node metastasis, we have to consider what is the most reasonable extent of resection - that is, whether to perform concurrent extra-hepatic bile duct resection (EHBD) resection or not. This study intends to evaluate the adequacy of EHBD resection in patients undergoing resection for T2N0 GBCa. Methods: From our institutional database of GBCa, 48 cases of T2N0 GBCa who underwent R0 resection during November 1995 and August 2008 were selected. Patients who underwent prior laparoscopic cholecystectomy were excluded. Their medical records were reviewed retrospectively. Results: Their mean age was 63.2±83.3 years and females were 25. The mean serum CA19-9 level was 37.3±89.3 ng/ml. The extents of liver resection were wedge resection (n=36) and segment 4a+5 resection (n=12). Concurrent EHBD resection was performed in 16 (33.3%) patients. No fatal surgical complication occurred. The majority of tumor pathology was adenocarcinoma (n=42), with additional unusual types as papillary (n=3), saromatoid (n=1), signet ring cell (n=1) and adenosquamous (n=1) cancers. The overall survival rate was 87.1% at 1 year, 69.5% at 3 years and 61.7% at 5 years. After exclusion of mortalities not related to cancer, the overall patient survival rate was 89.6% at 1 year, 72.9% at 3 years and 64.7% at 5 years, with 3-year survival rates of 72% in the EHBD resection group and 69.2% in the non-resection group (p=0.661). Conclusions: The results of this study indicate that concurrent EHBD resection did not improve patient survival when R0 resection was achieved in patients with T2N0 GBCa. Therefore, routine EHBD resection may not be indicated for T2N0 GBCa unless the tumor is close to the cystic duct. (Korean J Hepatobiliary Pancreat Surg 2012;16:142-146)
( Sung Hoon Moon ),( Kee Don Choi ),( Jin Tae Park ),( Dong Hoon Yang ),( Chang Yun Hwang ),( Ho June Song ),( Hwoon Yong Jung ),( Jin Ho Kim ) 대한소화기학회 2007 SIDDS Vol.9 No.-
Background/Aims: Potential risk of seeding of malignant cells during procedure including submucosal injection is one of our concerns in incomplete endoscopic mucosal resection (EMR). The present study investigated the outcome of gastrectomy after incomplete EMR for early gastric cancer (EGC). Methods: We analyzed 54 consecutive patients with EGC treated surgically after incomplete EMR or gastric wall perforation. EMR was performed between Jan. 1997 and Dec. 2005. We classified the incomplete EMR as the positive lateral margin; positive vertical margin including sub-mucosal invasion; positive both margins; undifferentiated histologic type. After gastrectomy, follow-up consisted of endoscopy and abdominal computed tomography annually. Results: Of the 54 patients, 37 patients were men and 17, women. Median patient age was 63 years (range 34-81 years). Causes of gastrectomy were as follows: 24 cases of positive lateral margin; 20 cases of positive vertical margin; 4 cases of positive both margins; 3 cases of undifferentiated histologic type; 3 cases of gastric wall perforation. Curative resection with LN dissection was performed in 53 patients and one patient underwent wedge resection, 2 patients (3.7%) had LN metastasis, they both underwent gastrectomy for submucosal invasion. There was one case of recurrence after gastrectomy (1.9%). He received EMR for 1.6cm sized moderately differentiated EGC and underwent surgery 2 days later when the result of mucosectomy revealed submucosal invasion. There was no regional LN metastasis out of 11 dissected LN. 5 years 10 months after surgery, hepatic metastasis and lymphadenopathy along heptoduodenal ligament were noted which proved to be metastatic adenocarcinoma by pathology. Despite receiving chemotherapy, be died 21 months after recurrence. Recurrence rate in patients with EGC who had been operated in our hospital between 1990 and 1997 was reported to be 4.1%. Conclusions: This study suggests that incomplete EMR dose not affect the prognosis of early gastric cancer surgery.
국내 원전 대상의 척도인자를 활용한 핵종재고량 규명 방법의 개발 - 범위 및 방사능 결정 방법-
Hwang, Ki-ha,Lee, Sang-chul,Kang, Sang-hee,Lee, Kun-Jai,Jeong, Chan-woo,Ahn, Sang-myeon,Kim, Tae-wook,Kim, Kyoung-doek,Herr, Young-hoi Korean Radioactive Waste Society 2004 방사성폐기물학회지 Vol.2 No.1
Regulations and guidelines for radioactive waste disposal require detailed information about the characteristics of radioactive waste drums prior to transport to the disposal sites. However, estimation of radionuclide concentrations in the drummed radioactive waste is difficult and unreliable. In order to overcome this difficulty, scaling factor (SF) method has been used to assess the activities of radionuclides, which could not be directly analyzed. A radioactive waste assay system has been operated at Korean nuclear power plant (KORI site) since 1996 and consolidated SF concept has played a dominant role in the determination of radionuclide concentrations. However, SFs are somewhat dispersive and limited in KORI site. Therefore establishment of the assay system using more improved SFs is planned and progressed. In this paper, the scope of research is briefly introduced. For the selection of more reliable activity determination method, the accuracy of predicted SF values for each activity determination method is compared. From the comparison of each activity determination method, it is recommended that SF determination method should be changed from the arithmetic mean to the geometrical mean for more reliable estimation of radionuclide activity. Arithmetic mean method and geometric mean method are compared based on the data set in KORI system. And, this change of SF determination method will prevent an inordinate over-estimation of radionuclide inventory in radwaste drum.
Production of Human Keratinocyte 14 Promoter Driven EC-SOD Transgenic Mice
Sung-Hyun Kim,Tae-Hoon Lee,Kil-Soo Kim,Eun-Ju Lee,Myoung-Ok Kim,Jun Hong Park,Kyoungin Cho,Boo K}rung Iung,Hee Chul Kim,Sol Ha Hwang,Hoon Taek Lee,Zae Young Ryoo 한국동물생명공학회(구 한국동물번식학회) 2004 Reproductive & Developmental Biology(Supplement) Vol.28 No.2s
The Effects of Female Collegian's Treadmill Walking Exereise on Lymphocyte Proliferation
Hwang, Ji In,Sung, Hye Ryen,Chyung, Kyung Sook,Ro, Soon Duck,Youn, Mi Suk,Lee, Ho Young,Park, Cheol Ho,Park, Hyun Tae,Park, Sang Kap 대한스포츠의학회 1998 대한스포츠의학회지 Vol.16 No.1
건강한 여자대학생 8명(age:19.6±0.06)을 대상으로 트레드밀 걷기 운동이 임파구 중식과 면역 글로불린에 미치는 영향을 파악하기 위하여 80m/min의 속도로 6km트레드릴 걷기 운동을 실시하였다. 대상자의 체중은 53.54kg, BMI는 21.29kg/㎡, %fat는 22.53%로 나타났으며 체중당 산소섭취량은 45.2ml/kg/min, 제지방량당 산소섭취량은 58.3ml/kg으로 나타났다. 임파구수와 임파구의 백분율은 걷기 운동전에 비하여 걷기운동후가 0.98(10^6·ml, 39.94%), 10.14%(43.80%)가 유의(p<.001)한 감소를 나타내었다. 면역글로불인은 걷기운동전에 비하여 걷기운동후가 조금 감소하였으나 유의성은 없으며, PHA와 PWM은 걷기운동전에 비하여 걷기 운동후가 1.0 counts·min·10^3(20%), 0.13 counts·min·10^3(3.1%)이 유의(p<.001, p<.05)한 감소를 나타내었다. 본 연구에서 걷기 운동으로 나타난 임파구의 수와 임파구의 백분율, 면역글로불린은 단시간 운동에 대한 명확한 결론이 이루어지지 않았으므로, 면역기능을 강화시킬 수 있는 운동의 최적강도가 지속시간에 대한 연구가 필요할 것으로 사료된다.