There is a growing research interest in language teachers’ professional identity. Nevertheless, unlike studies involving the identity of native and non-native English-speaking teachers, few studies analyzed Gyopo English teachers’ identity despite a sizeable body of Gyopo teachers in the Korean educational context. Using post-structural perspectives of identity, this case study analyzed the identities of a Gyopo instructor as an English teacher and how such identities were reflected in classroom practice. Data were collected through interviews, classroom observations, and self-reflective reports written by the participant. Findings reveal that the participant constructed multiple professional identities as a teacher with previous language learning experiences, a bridge-builder, a multitasker, and a teacher who is not a native English speaker but an American, and a replaceable person. While experiencing identity conflicts, she constantly negotiated and renegotiated her multiple, contradictory identities to position herself more favorably. Based on these findings, the present study offers pedagogical suggestions.

본 연구는 기능성 팽화 스낵의 개발을 위하여 우수한 식이섬유소원인 차전자피를 첨가한 쌀 압출성형물의 물리적 특성에 대하여 살펴보았다. 원료 배합비는 쌀을 기본 원료로 하여 차전자피의 함량(0, 7, 14, 21%)을 달리하였고, 압출성형 공정변수는 스크루 회전속도 200 rpm, 사출구 온도 140oC, 수분함량 20%로 조절하였다. 압출성형 후 직경 팽화율, 비길이, 밀도, 겉보기 탄성계수, 파괴력, 조직감, 색도, 수분용해지수, 수분흡착지수, 미세구조를 측정하였다. 직경 팽화율은 차전자피 함량이 증가할수록 감소하였으며, 비길이, 밀도, 겉보기 탄성계수와 파괴력은 증가하는 경향을 보였다. 부착성은 차전자피 함량이 증가할수록 증가하였으며 21% 첨가에서 급격히 증가하였다. 차전자피의 첨가량이 증가할수록 명도는 감소하였고 적색도, 황색도, 총 색도차는 증가하는 경향을 보였다. 수분용해지수와 수분흡착지수는 압출성형 공정 후 모두 증가하였으며 차전자피의 함량이 증가할수록 증가하였다. 미세구조는 차전자피 첨가량이 증가할수록 팽화와 기공의 크기가 감소하여 압출성형물의 밀도가 증가하였다. 결론적으로 차전자피의 첨가량이 증가할수록 팽화를 감소시켜 단단한 조직감을 나타내었고 높은 수분흡수력으로 인해 부착성이 증가하여 14% 이하로 첨가 하는 것이 바람직하다. 또한 차전자피의 함량이 높은 팽화 스낵을 개발하기 위하여 유화제의 첨가 뿐만 아니라 차전 자피의 전처리 등 추가적인 연구가 필요할 것이다.

Using network betweenness centrality we attempt to analyze the characteristics of Seoul metropolitan subway lines. Betweenness centrality highlights the importance of a node as a transfer point between any pairs of nodes. This ‘transfer’ characteristic is obviously of paramount importance in transit systems. For betweenness centrality, both traditional betweenness centrality measure and weighted betweenness centrality measure which uses monthly passenger flow amount between two stations are used. By comparing traditional and weighted betweenness centrality measures of lines characteristics of passenger flow can be identified. We also investigated factors which affect betweenness centrality. It is the number of passenger who get on or get off that significantly affects betweenness centrality measures. Through correlation analysis of the number of passenger and betweenness centrality, it is found out that Seoul metropolitan subway system is well designed in terms of regional distribution of population. Four measures are proposed which represent the passenger flow characteristics. It is shown they do not follow Power-law distribution, which means passenger flow is relatively evenly distributed among stations. It has been shown that the passenger flow characteristics of subway networks in other foreign cities such as Beijing, Boston and San Franciso do follow power-law distribution, that is, pretty much biased passenger flow traffic characteristics. In this study we have also tried to answer why passenger traffic flow of Seoul metropolitan subway network is more homogeneous compared to that of Beijing.

We performed a survey for flavivirus infection and distribution of Aedes albopictus that known as Zika and Dengue virus vector using black–light trap and BG-sentinel trap around urban area in Korea. Mosquitoes were collected in 27 cities during March to November (twice a month) year 2016. Total numbers of mosquitoes collected 102,102 including 19 species 8 genera during collecting period. Total 21,467 Ae. albopictus was collected that 20,961(24.3%) by BG-sentinel trap and 506 (3.2%) by Black-light trap in urban area. Trap index(trap/night) of Ae. albopictus was showed highest in Hamyang (TI:992.3) and lowest in Taebaek (TI:0.3) there was only collected by Black-light trap. A total of 894 pools from all collecting Ae. albopictus were performed a Flavivirus detection. Flavivirus was not detected during study period. This study may provide basic information for surveillance of imported diseases (include Zika virus) and vectors in Korea.

해수 담수화에 있어 RO막오염을 방지하기 위한 전처리로 MF 및 UF에 대하여 연구되어 왔으며, MF/UF의 전처리로 오토스트레이너를 사용하여 100μm 이상의 입자를 제거하는 것이 일반적이다. 그러나, 서해안의 경우 남해보다 높은 고탁도 물질이 다량으로 함유되어 있어 정확한 해수 특성분석에 따른 전처리 공정이 선정되어야 할 것으로 판단된다. 따라서 본 연구에서는 서해안 지역의 해수 특성에 대하여 분석하여 적합한 전처리를 선정하기 위한 조건을 도출하고자 하였다. 서해안 지역의 15지점 해수에 대하여 탁도, SS, SiO2, TOC, UV254, 보론, TEP 등 20여개 항목에 대하여 분석하였다. 해수의 탁도는 평균 6.5∼ 11NTU를 나타내었으며 입도분석결과 2∼20μm 입자가 97% 이상 존재하였다.

This study was conducted to evaluate the accumulation and distribution of hydrophobically modified glycol chitosan (HGC) as a degradable nanoparticle in the body. To determine the movement of degradable HGC nanoparticles in the body, 20 mg/kg of lutetium177-labeled HGC (Lu177-HGC) with the size ranging from 320 to 400 nm was injected intravenously into ICR mice, and the amount of radioactivity remaining in blood and several organs was measured at various time points during the period of 5 days. In the pharmacokinetics analysis using the Lu177 radioisotope, the free Lu177 was mainly distributed and accumulated in the order of kidney>liver>lung at 1 day after the injection of the radioisotope. However, the Lu177-HGC showed a high distribution of nanoparticles in the order of liver>spleen>kidney during the experimental period of 5 days. These results would provide a basic pharmacokinetics for the use of HGC as a drug carrier in drug delivery system.

The ultimate goal of this study is to assess the accumulation and distribution of hydrophobically modified glycol chitosan (HGC) as a degradable nanoparticle in the body. To understand the movement of degradable nanoparticle HGC in the body, we intravenously injected a dose of 20 mg/kg of Cy5.5-labeled HGC with size ranging from 320 to 400 nm into ICR mice, and measured the amount of fluorescence remaining in blood and several organs at various time intervals. In blood, the level of Cy5.5-labeled HGC was the highest at 15 min, then after 30 min it decreased rapidly and reached a plateau form 30 min to 28 days. In the tissue we confirmed the presence of nanoparticles at high levels in the order of kidney>liver>submandibular gland until 28 days after injection. However, we did not find the presence of the particles in the brain or testes. These results will provide basic information on HGC as a drug delivery agent.

The present study purposed to examine the effects of transcutaneous electrical nerve stimulation, self-stretching and functional massage on the recovery of muscle contraction force for muscle fatigue caused by sustained isotonic contraction. The subjects of this study were 45 healthy students. They were divided into transcutaneous electrical nerve stimulation group(n=15), self-stretching group(n=15) and functional massage group(n=15), and using Primus RS. We observed the pattern of changes in maximal voluntary isometric contraction force(MVIC) after causing muscle fatigue in quadriceps femoris muscle through sustained isotonic contraction. Maximal voluntary isometric contraction force(MVIC) were greatly increased after transcutaneous electrical nerve stimulation, self-stretching and functional massage. In the comparison of recovery rate of muscle contraction force for muscle fatigue caused by sustained isotonic contraction among the treatment groups, it did not show any significant differences. However, it showed that each treatment may be effective in recovery of muscle fatigue caused by sustained isotonic contraction.

This study aims to reveal how EA affects BAX and NF-kB involved in cell deaths from global ischemia, and to do this, observes the changes of BAX and NF-kB caused by EA application after transient global ischemia. The experimental method is to give rise to global ischemia and apply EA to 27 SD rats with the particulars of being six-week-old, male, around-300 gram-weighing, and adapted to laboratory environment for more than a week, and divide them into three groups, that is, GV20 EA group(n=9), L14 EA group(n=9), no-treatment GI group(n=9), and then observe their changes of BAX and NF-kB at the time lapse of 6 hours, 9 hours and 12 hours after ischemia, using western blotting. The numerical decrease of BAX expression at the time lapse of 9 hours after EA application, though not statistically significant, was observed in GV20 EA group and L14 EA group, and the NF-kB expression appeared statistically significant decrease in GV20 EA group and L14 EA group, but the expression was higher in the group with EA application. Therefore, EA application at the early phase of global ischemia is considered to affect BAX and NF-kB and play a positive role in decreasing apoptosis and cell deaths by inflammation.

EBR-II사용후핵연료의 파이로건식처리공정에 의해 발생된 우라늄의 순도에 대한 포괄적인 분석을 수행하였다. 분석결과를 미국 아이다호 국립연구소 및 한국원자력연구원의 협력과제 하에서 한국과 미국의 저준위 폐기물 기준으로 비교하였다. 미국의 저준위 폐기물 기준은 우라늄 동위원소를 포함하지 않으나, 한국의 경우는 포함하는 것으로 조사되었다. 분석결과 EBR-II 우라늄 생성물 내에서 저준위 기준을 초과하는 유일한 알파 핵종은 우라늄 동위원소가 아니라 Pu-239였다. 생성물 내의 Pu 오염은 개량된 염증류공정을 통한 예비실험 결과 획기적으로 줄일 수 있음을 알 수 있었으며, 보다 공정을 개선 시킨다면 제안된 기술을 이용하여 미국의 저준위 기준을 만족시킬 수 있을 것으로 판단된다

고연소도 경수로사용후핵연료를 이용하여 voloxidation 및 소결 열처리 공정으로부터 세슘의 시간에 따른 방출 거동을 실험적으로 평가하였다. 사용후핵연료 voloxidation 공정에서는 fragment 형태의 시편을 사용하여 최대 의 산화 및 환원 분위기에 따른 세슘 방출 거동을 상호 비교하였으며, 소결 공정에서는 압분체를 이용하여 4% H2/Ar 환원분위기 에서 열처리 온도 변화에 따른 세슘방출 특성 변화를 분석하였다. 산화 분위기에서 fragment 형태의 사용후핵연료로부터 세슘 방출 온도 구간은 였으며, 환원 분위기에서 압분체로부터 방출 온도 구간은 로서, 산화에 의한 사용후핵 연료의 분말화가 세슘 방출 거동에 영향을 미치는 것으로 나타났다. 아울러 사용후핵 연료로부터 세슘 방출 거동에 영향을 미치는 주요 인자는 사용후핵 연료내 세슘 화합물의 화학적 형태뿐만 아니라 결정립 및 핵연료 표면으로의 확산 속도에 지배를 받음을 알 수 있었다.