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초등 특수학급 신규 기간제 교사의 교직 적응 어려움 및 개선 요구에 대한 질적 접근
양승기,김호연 한국통합교육학회 2011 통합교육연구 Vol.6 No.2
This study is to investigate the adaptation difficulties among non-tenure tract teachers who were newly got teaching jobs as special education teachers at elementary schools. The areas of adaptation difficulties were divided into two aspects; the management of special class and interactions with school faculties. Five non-tenure tract teachers who currently have been working as special teachers in Seoul, the province of Gyounggi, and Incheon were included as research participants. Approximately the duration of their teaching experience were under 3 years. Individually two or three time of deep interviews were implemented. Totally 11 interviews were implemented with 5 participants. Shortly, the participants are struggling with two kinds of difficulties those come from their short term of teaching experiences as well as the insecurity of their job including. Moreover, their needs as special teachers were included. Finally, limitations of the current study were discussed and ideas of future research were suggested. 본 연구의 목적은 초등 특수학급 신규 기간제 교사의 교직적응능력을 향상시키기 위하여 교직적응 영역에서 발견되는 문제를 기술하고 문제를 해결해가는 교직적응방안을 모색하는데 있다. 교직생활을 하면서 부딪치는 다양한 문제 사태를 해결하여 교직에 자신감을 갖고 교육의 목표를 달성하는 것을 교직적응으로 하고 교직적응영역을 특수학급 경영면, 인간관계면의 2가지 영역으로 분류하였다. 서울, 경기, 인천과 같이 수도권에 소재하고 있는 초등학교의 특수학급을 담당하고 있는 신규 기간제 특수교사 중 교육경력 3년 미만 5명에게 심층 면담을 통한 질적 분석을 시도하였으며 개별적으로 2-3회, 총 11회 동안 심층면담을 실시하였다. 연구결과 신규 기간제 특수교사들은 신규 특수교사로서 겪어야 할 문제와 기간제 교사이기 때문에 겪어야 하는 문제가 가중되는 것으로 나타났다. 그 밖에 신규 기간제 교사들이 요구하는 목소리에서 개선 방안을 도출하여 결론에 제시하였다. 끝으로 연구의 제한점과 후속연구에 대한 제언을 논의하였다.
Doxorubicin 유발 심근증 백서 모델에서 성체골수줄기세포를 이용한 심근재생 효과
양관모,박찬석,장성원,박훈준,김동빈,김범준,정해억,백상홍,승기배,최규보 대한심장학회 2008 Korean Circulation Journal Vol.38 No.2
Background and Objectives: Bone marrow cells have been shown to differentiate into various cell lineages, including cardiomyocytes, in recent studies. This study evaluates the hypothesis that intravenous injection of bone marrow mononuclear cells (BMNCs) into rats with doxorubicin-induced cardiomyopathy can induce myocardial regeneration and improve myocardial contractility. Materials and Methods: Adult male Sprague-Dawley rats were induced to develop cardiomyopathy by treatment with doxorubicin (2.5 mg/kg, 6 times, 2-week period). Stem cell enriched BMNCs were injected into the tail vein of the rats after cessation of the doxorubicin injections. One week after the injection of PKH-67-labeled BMNCs, the localization of transplanted cells was evaluated. Immunohistochemical studies and Western blots were performed two weeks after BMNCs injection. Results: Cell-treated animals showed significant improvement in left ventricular fractional shortening as compared to untreated (control) rats (cell treated group vs. control group 47.2±4.9% vs. 34.4±3.6%, p<0.01). Histological analyses showed that in the cell-treated animals there was an increase in ventricular interstitial collagen deposition and the cell-treated animals had an improved number of capillary endothelial cells as compared with the control rats. PKH-67- labeled BMNCs and cell proliferation by BrdU was noted in the cell-treated hearts. Cardiac CXCR4 protein expression increased at day 7 and 14 in the cell-treated rats, but only at day 14 in the control animals. Conclusion: These results suggest that intravenous injection of BMNCs effectively induce engraftment of BMNCs into the myocardium and attenuation of fibrosis. Intravenous injection of BMNCs also improved myocardial contractility in doxorubicininduced cardiomyopathy. Background and Objectives: Bone marrow cells have been shown to differentiate into various cell lineages, including cardiomyocytes, in recent studies. This study evaluates the hypothesis that intravenous injection of bone marrow mononuclear cells (BMNCs) into rats with doxorubicin-induced cardiomyopathy can induce myocardial regeneration and improve myocardial contractility. Materials and Methods: Adult male Sprague-Dawley rats were induced to develop cardiomyopathy by treatment with doxorubicin (2.5 mg/kg, 6 times, 2-week period). Stem cell enriched BMNCs were injected into the tail vein of the rats after cessation of the doxorubicin injections. One week after the injection of PKH-67-labeled BMNCs, the localization of transplanted cells was evaluated. Immunohistochemical studies and Western blots were performed two weeks after BMNCs injection. Results: Cell-treated animals showed significant improvement in left ventricular fractional shortening as compared to untreated (control) rats (cell treated group vs. control group 47.2±4.9% vs. 34.4±3.6%, p<0.01). Histological analyses showed that in the cell-treated animals there was an increase in ventricular interstitial collagen deposition and the cell-treated animals had an improved number of capillary endothelial cells as compared with the control rats. PKH-67- labeled BMNCs and cell proliferation by BrdU was noted in the cell-treated hearts. Cardiac CXCR4 protein expression increased at day 7 and 14 in the cell-treated rats, but only at day 14 in the control animals. Conclusion: These results suggest that intravenous injection of BMNCs effectively induce engraftment of BMNCs into the myocardium and attenuation of fibrosis. Intravenous injection of BMNCs also improved myocardial contractility in doxorubicininduced cardiomyopathy.
$Ta_2O_{5}$ 박막의 누설전류 및 유전특성과 박막응력
이재석,양승기,신상모,박종완,Lee, Jae-Suk,Yang, Ki-Seung,Shin, Sang-Mo,Park, Jong-Won 한국재료학회 1995 한국재료학회지 Vol.5 No.6
열산화 및 PECVD법으로 p-type(100)Si wafer위에 $Ta_2O_{5}$, 박막을 형성한 후 이들 박막의 전기적 특성과 박막응력 상호간의 관계를 연구하였다 열산화 시편의 경우 dc magnetron sputtering법으로 Ta을 증착시킨 후에 산화온도와 시간을 변수로 열산화시켜 박막을 형성시켰으며 PECVD 시편의 경우 RF power density를 변화시켜가면서 박막을 형성시켰다. 이들 박막의 전기적 특성과 박막응력을 조사하여 전기적 특성과 박막응력 상호간의 관계를 조사한 결과 열산화 박막의 경우 누설전류와 박막응력은 독립적인데 반해 PECVD 박막의 경우 박막응력의 절대값은 누설전류가 증가함에 따라 증가하였다. Two types of $Ta_2O_{5}$, films, prepared by thermal oxidation and PECVD, on P-type(100) Si wafers were studied to examine the relationship between electrical properties and stresses of the films. For the thermally oxidized films, Ta films were depositied on the Si wafers by dc magnetron sputtering followed by thermal oxidation as functions of oxidation temperature and time. The PECVD films were deposited on the Si wafers as a fuction of RF power density. The relationship between the electrical properties and film stresses were studied. In the case of thermally oxidized $Ta_2O_{5}$ film, the electrical properties and film stress were not found to be dependent on each other, while PECVD $Ta_2O_{5}$ films showed that the electrical properties were depended on the film stress.