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최성재,Choi, Sung-Jai 한국인터넷방송통신학회 2011 한국인터넷방송통신학회 논문지 Vol.11 No.6
$AlO_x$ 박막 소자를 제작하여 전기적 특성을 조사하였다. 소자는 Electrode를 Top-bottom구조로 제작하였으며 스위칭 특성을 연구하기 위해 전극간의 $AlO_x$ 박막의 전도특성이 측정되었다. 박막소자의 저항변화는 전압을 선형적으로 인가하여 측정하였다. 제작된 소자는 MIM구조로써 외부에서 인가하는 전기적 신호에 의하여 전기전도도가 큰 On-state와 전기전도도가 낮은 Off-state로 바뀌는 특성을 나타내었다. 본 연구에 사용된 $AlO_x$ 박막은 초기 저항 상태가 저저항 On 상태였으며, 전압을 인가함에 따라 저저항 On 상태와 고저항 Off 상태의 가역적 저항 변화 특성을 나타내었다. 본 연구를 통하여 $AlO_x$ 박막소자는 차세대 비휘발성 메모리로는 물론 다른 전기적 응용도 기대되는 물질임을 확인하게 되었다. We have investigated the electrical properties of $AlO_x$ thin film device. The device has been fabricated top-bottom electrode structure and its transport properties are measured in order to study the resistance change. Electrical properties with linear voltage sweep on a electrodes are used to show the variation of resistance of $AlO_x$ thin film device. Fabricated $AlO_x$ thin film device with MIM structure is changed from a high conductive On-state to a low conductive Off-state by the external linear voltage sweep. It is found that the initial resistance of the $AlO_x$ thin film is low-resistance On state and reversible switching occurs. Consequently, we believe $AlO_x$ thin film is a promising material for a next-generation nonvolatile memory and other electrical applications.
경피증 ( Scleroderma ) 의 폐침범에 관한 임상적 고찰
김영환(Young Whan Kim),한성구(Sung Koo Han),최성재(Sung Jai Choi),심영수(Young Soo Shim),김건열(Keon Youl Kim),한용철(Yong Chol Han) 대한내과학회 1987 대한내과학회지 Vol.34 No.1
N/A Pulmonary function tests and chest X-ray's were analyzed in 100 scleroderma patients who have been diagnosed in Seoul National University Hospital during recent 7 years to study on the pulmonary involvement of scleroderma. 1) Among 90 patients, 44% showed interstitial lung disease on chest X-ray's. Mild involvement was 31%, moderate 11.1% and severe 2.2% respectively. 2) 66.7% of patients showed FVC less than 80% of predicted value, but only 26.5% showed FBV1/FVC less than 80%, characterizing restricitive pulmonary function abnormality. 3) 79.4% of patients showed Diffusing Capacity less than 80% of predicted value. 4) Severity of chest X-ray abnormality showed correlation with disease duration, but FVC and Diffusing Capacity did not show statistically significant correlation with disease duration. 5) Chest X-ray abnormality and Diffusing Capacity were not statistically correlated. According to these results, the most sensitive test to find pulmonary involvement in scleroderma is Diffusing Capacity, and chest X-ray alone is not sufficient.
호텔종사원의 인구통계학적 특성에 따른 윤리적 리더십, 직무만족, 조직몰입, 직무성과의 차이에 관한 연구
김금영 ( Kum Young Kim ),신지언 ( Ji Oen Shin ),최성재 ( Sung Jai Choi ) 한국호텔리조트학회(구 한국호텔리조트카지노산학학회) 2016 호텔리조트연구 Vol.15 No.2
In modern society, managements are required to have higher level of moral responsibility and at the same time, an ethical management is the one of important facts to evaluate the organization``s value. Thus, it cannot be emphasized that the ethical leadership is significant to hotel managements. Especially, the ethical leadership is highlighted in the hotel industry because the human resource is an initial recourse of hotel business as well as an organizational effectiveness. Therefore, this research will study relationship among the demographic characteristics and an employees job satisfaction, an organizational committment, and a job performance through demographic analysis. It will contribute to maximize an efficiency of human resource management and to provide a valuable data to enhance organization``s competitiveness in the market. Through reviewing the previous studies and conducting an empirical analysis,