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학교장의 거래적 리더십과 변혁적 리더십이 교사들의 조직몰입에 미치는 영향관계분석
김창걸 ( Kim Chang-geol ),윤순희 ( Youn Soun-hee ) 인하대학교 교육연구소 2005 교육문화연구 Vol.11 No.-
The purpose is to provide the knowledge of the effect of principal's transactional and transformational leadership on teachers' organizational commitment. First, we'll look into the difference between transactional leadership and transformational leadership. Second, we'll examine the extent of teachers' organizational commitment. Third, we can search the relationship between those two leadership and the organizational commitment. Forth, we'll see the relationship varying the teachers and schools. The measure tool for this study is Kim, Chang-Geol's transactional and transformational leadership measure tool, which we adjusted to be proper for the study and the scale for organizational commitment is Porter(1974)'s OCR (Organizational Commitment Questionaire) that Kim, Chang-Geol has reformed and I adjusted it again for the study. SPSS 10.0 Package has been used for the arrangement of the data. The conclusion of the study is First, teachers recognize principal's transformational leadership highly concluded with the analysis of the difference between transactional leadership and transformational leadership. (t=8.457, p<.05) Second, we can see higher level of teacher's organizational commitment than the average. (M=3.33) The infra changes such as faithfulness, voluntary and acceptance of the common value also show the higher level. The groups according to Duncan's sort is well balanced, as the degree of teachers' organizational commitment has higher level than average. which is contributing the educational activities. Third, In the relationship of transactional and transformational leadership with teachers' organizational commitment, transactional leadership related with only its infra matter, contingency rewards, but transformational leadership was connected with all the infra matters and the organizational commitment, which shows that transformational leadership has more effect on organizational commitment than transactional leadership. Forth, The relationship between the organizational commitment and principal's leadership according to teachers and schools is as below. ① According to the gender of the teachers : the expectation for the result for the men(β=.455) and allowance to join the group for the women (β=.303) had much effect on the organizational commitment ② According to the status of the teachers : the expectation for the result for the general teachers (β=.165) and allowance to join the group for the director (β=.302) had much effect on the organizational commitment ③ According to the academic background of the teachers : the personal consideration for the college graduated (β=.595), the allowance to join the group for the university graduated (β=.216) and the expectation for the result for graduate school educated (β=.271) had much effect on the organizational commitment ④ According to the public and private institution : the expectation for the result for public school's teachers (β=.223) and allowance to join the group for the private school's teachers (β=.308) had much effect on the organizational commitment ⑤ According to the kinds of schools : the personal consideration for the primary school teachers (β=.279), the allowance to join the group for middle school teachers(β=.444) and the expectation for the result for the high school teachers(β=.314) had much effect on the organizational commitment. Now we can conclude that the principal should lead the teachers' organizational commitment with the transformational leadership at the same time he need to value the infra-matters properly according to the situation.
김연수 ( Yeon-soo Kim ),김효걸 ( Hyo-geol Kim ),김용주 ( Yong-joo Kim ),김정길 ( Jeong-gil Kim ),김태영 ( Tae-young Kim ),김영주 ( Young-joo Kim ),이상대 ( Sang-dae Lee ) 한국농업기계학회 2017 한국농업기계학회 학술발표논문집 Vol.22 No.2
최근 국내 농촌의 인구고령화, 여성화로 인한 농촌노동력 감소 문제를 해결하기 위해 밭농업기계화에 관한 연구가 활발히 진행되고 있다. 대부분의 밭농업기계에 관현 연구는 필드 시험을 통해 진행되고 있다. 그러나 승용형 채소 정식기에 대한 성능평가 방법은 개발되지 않아 관련 연구가 필요한 실정이다. 본 연구는 밭농업 대표기계 중 하나인 승용형 채소 정식기의 성능평가 방법 중 주행성능평가방법을 개발하기 위해 수행되었으며, 시험을 위한 농기계 험로주행성능 계측 시스템을 구성하여 선진사 비교기대와 국내 개발사 제품의 주행성능평가를 진행하였다. 험로주행성능 계측 시스템은 DGPS, INS 센서, 가속도 측정 장치, 조향 토크 측정 장치, 답력 측정 장치, 제동 조작 레버 작동력 측정 장치, 소음 측정 장치, CAN 모듈, DAQ, 장거리 데이터 전송 장치 등으로 구성되어 있다. 계측 시스템을 활용하여 승용형 채소 정식기의 자체진동, 작업기 연결부 진동, 기대 소음, 브레이크 답력, 조향각 등의 동특성 요소를 대상으로 주행성능평가를 실시하였다. 험로주행성능 계측 시스템을 활용한 시험 결과값을 통해 선진사 비교기대와 국내 개발사 제품간 자체적인 조작성, 승강성과 같은 사용성 성능평가 요소를 비교·분석하였다. 시험 결과 국내 개발사 제품의 동특성 중 기대 진동, 브레이크 답력, 조향 토크 등은 비슷한 수치를 보였으나, 소음과 최대 조향각에서 선진사 제품 대비 약 1.32배, 1.51배의 차이를 보였다. 본 연구를 통해 개발된 승용형채소 정식기 주행성능평가방법을 활용하여 농업기계 시제품의 주행성능평가 체계를 확립하고 개발자의 연구개발 기간· 비용을 줄이는데 기여할 것으로 판단된다. 향후 실제 필드시험 결과값 분석을 통해 개발된 농업기계 주행성능평가 방법의 범용적인 적용 가능성을 검증 할 계획이다.
Ketobacter alkanivorans gen. nov., sp. nov., an n-alkane-degrading bacterium isolated from seawater
Kim, Seol-Hee,Kim, Jong-Geol,Jung, Man-Young,Kim, So-Jeong,Gwak, Joo-Han,Yu, Woon-Jong,Roh, Seong Woon,Kim, Yang-Hoon,Rhee, Sung-Keun Microbiology Society 2018 International journal of systematic and evolutiona Vol.68 No.7
Cytotoxicity of Root Canal Sealers Containing Calcium Hydroxide
Kim, In-Geol,Han, Se-Hee,Cho, Young-Gon,Lee, Sang-Bae,Kim, Kwang-Mahn,Kim, Kyoung-Nam Korean Academy of Dental Science 2009 Journal of korean dental science Vol.2 No.1
The purpose of this study was to investigate the possibility to reduce the toxicity of oil based root canal sealers containing calcium hydroxide using MTT & agar overlay assays. Thus some formulations of traditional root canal sealers were replaced with oil-soluble solvents and experimental root canal sealers manufactured. In MTT assay, Cell viability of all experimental sealers in addition with oil soluble solvents were observed significantly higher than both control groups, especially according to replace zinc and/or calcium ion components. Also agar overlay assay was appeared moderate to no cell responses into modifying both zinc and/or calcium ion components and oil soluble solvent weight. Authors found the reducing effect of cell toxicity through significant role of oil soluble solvent factor into root canal sealer containing calcium hydroxide.
Characterization of a recombinant endo-type alginate lyase (Alg7D) from Saccharophagus degradans.
Kim, Hee Taek,Ko, Hyeok-Jin,Kim, Nahyun,Kim, Duwoon,Lee, Dongho,Choi, In-Geol,Woo, Hee Chul,Kim, Myoung Dong,Kim, Kyoung Heon Kluwer Academic Publishers 2012 Biotechnology letters Vol.34 No.6
<P>A gene, alg7D, from Saccharophagus degradans, coding for a putative alginate lyase belonging to the family of polysaccharide lyase-7, was overexpressed in Escherichia coli. The properties of the recombinant Alg7D were characterized. The enzyme endolytically depolymerized alginate by 관-elimination into oligo-alginates with degrees of polymerization of 2-5. Its activity was maximal at 50°C and pH 7 and was slightly increased in the presence of Na(+). The K(M), V(max), k(cat), and k(cat)/K(M) values were: 3 mg ml(-1), 6.2 U mg(-1), 1.9 ?? 10(-2) s(-1), and 6.3 ?? 10(-3) mg(-1 )ml s(-1), respectively.</P>
Kim, Beom Kyung,Cho, Byoung Chul,Choi, Hye Jin,Sohn, Joo Hyuk,Park, Moo Suk,Chang, Joon,Kim, Se Kyu,Kim, Dae Joon,Chung, Kyung Young,Lee, Chang Geol,Kim, Joo Hang,Yoo, Nae Choon National Hellenic Research Foundation 2008 ONCOLOGY REPORTS Vol.19 No.6
<P>Thymic epithelial tumors (TETs) consist of a series of neoplasm that differ morphologically and biologically. Due to its rarity and indolent natural history, large-scale prospective trials have been lacking. This study aimed to evaluate long-term clinical outcomes and clinicopathologic features for TET after surgical resection and adjuvant treatments. One hundred patients who received surgery plus adjuvant radiotherapy +/- chemotherapy for TET (Masaoka stage II-IVa) from 1995 to 2005 were retrospectively reviewed. Masaoka staging systems were adopted, and pathologic results were classified according to World health organization (WHO) histologic classification. After surgery, 55 patients were treated with radiotherapy alone, while 45 with radiotherapy and chemotherapy. The median radiation dose was 50.4 Gy (45-63 Gy) and six cycles of chemotherapy, consisting of doxorubicin, cisplatin, vincristine and cyclophosphamide, were applied every 3-4 weeks. Distributions according to Masaoka stage were as follows; stage II (58 patients), III (21) and IVa (21). According to WHO histology, there were A (3), AB (7), B1 (7), B2 (31), B3 (31) and C (21). With a median follow-up duration of 65 months (8-143 months), the 5-year overall survival (OS) and disease-free survival (DFS) rates were 75.7% (89.2, 67.9 and 52.1% in stage II, III and IVa, respectively) and 70.3% (83, 62.4 and 33.6% in stage II, III and IVa, respectively). In multivariate analysis, prognostic factors for OS were age, WHO histology, Masaoka stage, and recurrence, while pleural involvement, WHO histology, and Masaoka stage had significant impacts on DFS. Adjuvant chemotherapy did not alter survival outcomes and recurrence patterns. Pleura was the most common recurrence site (15 patients, 53.6%), and significantly associated with pleural recurrence-free survival. In conclusion, pleural involvement at diagnosis was the important prognostic factor, in addition to WHO histology and Masaoka stage. To prevent pleural recurrence and prolong survival, innovative therapeutic approaches warrant further investigations.</P>