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認知的 樣式에 따른 敎育 및 職業的 關心과 興味에 關한 硏究
全閏植,張赫杓 부산대학교 1979 論文集 Vol.28 No.1
The concepts and the historical research works of cognitive styles were reviewed, particularly on the basis of the relationship between cognitive styles and vocational interests/choices. As a general principle, relatively field-independent persons, taken as a group, are likely to show interest in domains where their cognitive skill competence in articulation or in analysis, and structuring are called for and where relations with people are not particularly involved. In contrast, relatively field-dependent persons, as a group, are likely to favor domains with a "people" emphasis-that is, which feature social content and which involve interpersonal relations in daily ongoing activities and for which analytical/structuring competence does not particularly matter. Group Embedded Figure Tests were administered to examine any relationship between field-dependence-independence and academic-vocational interests/choices among Korean college and high school students. The Ss were 205 college students and 121 high school students. However, no significant relations were observed between cognitive styles and academic vocational interests/choices. Further research on this problem with more large sample size is required.
저전력 모드 Bluetooth 시스템을 이용한 파일 전송에 관한 성능 분선
윤현성,이민혁,변건식 동아대학교 정보기술연구소 2002 情報技術硏究所論文誌 Vol.9 No.2
Bluetooth is the name given to a new technology standard using short-range radio links, intended to replace the cable(s) connecting portable and/or fixed electronic devices. The standard defines a uniform structure for a wide range of devices to communicate with each other, with minimal user effort. Its key features are robustness, low complexity, low power and low cost. The standard is aimed at achieving global acceptance such that any Bluetooth device, anywhere in the world, can connect to other Bluetooth devices in its proximity , regardless of brand. Bluetooth enabled electronic devices connect and communicate wirelessly via short-range, ad hoc networks called piconets. Each unit can simultaneously communicate with up to seven other units per piconet. Moreover, each unit can simultaneously belong to several piconets. These piconets are established dynamically and automatically as Bluetooth devices enter and leave the radio proximity.
Yoon, Young Jun,Seo, Jae Hwa,Kang, Hee-Sung,Kim, Young-Jo,Bae, Jin-Hyuk,Cho, Eou-Sik,Lee, Jung-Hee,Cho, Seongjae,Man Kang, In Institute of Pure and Applied Physics 2014 Japanese Journal of Applied Physics Vol. No.
<P>In this study, we investigated the effects of dielectric materials for spacers on the performance characteristics of germanium (Ge)-based tunneling field-effect transistors (TFETs). Direct current (DC), radio frequency (RF), and switching performance characteristics were analyzed using various spacer dielectric materials including recent interlayer dielectric (ILD) oxides, silicon dioxide (SiO2), silicon nitride (Si3N4), and hafnium oxide (HfO2). Since spacer dielectrics affect the band bending in the source and drain regions caused by fringing fields, a Ge-based TFET having a low-kappa. spacer dielectric showed a high current drivability owing to its steep energy-band bending on the source side. At the same time, outstanding switching and RF performance characteristics were achieved by reducing parasitic capacitances when a low-. spacer dielectric was employed. On this basis, a Ge-based TFET with a low-. spacer dielectric was designed with a drain underlap for satisfactory control of the ambipolar behaviors and for optimization of RF performance characteristics. It was proven that the drain underlap suppressed ambipolar current characteristics and reduced gate capacitance by minimizing the electric field induced by the gate electrode on the drain-side channel without degradation of current drivability. (C) 2014 The Japan Society of Applied Physics</P>
윤여준,박성우,이준혁,장안수,박춘식 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2
Pulmonary tuberculosis as a cause of the acute respiratory distress syndrome is quite rare. The diagnosis of acute respiratory distress syndrome due to pulmonary tuberculosis is difficult because of the diversity of radiological patterns. The ability to identify patients at risk for the acute respiratory distress syndrome is important if therapies are to be developed to prevent the disorder. We experienced a young female compliants with mild fever, dyspnea who diagnosed pulmonary tuberculosis 1 months ago. She stoped anti-tuberculosis medication 2 day because confirmation of drug fever and after then sudden aggravated dyspnea. The clinical course of this case is similar with presentaion of ARDS. We started antituberculosis medication with steroid, which result in good prognosis.
위암종에서 Vascular Endothelial Growth Factor(VEGF)와 Ki-67에 관한 연구
윤혁진,박성재,최경환,최정식,설상영,이선경 인제대학교 1999 仁濟醫學 Vol.20 No.1
혈관 형성이 종양의 성장, 진행에 중요한 역할을 한다는 것이 알려져 있다. 저자들은 혈관 형성성 인자인 Vascular endothelial growth factor(VEGF)의 발현과 위암종의 진행 및 핵 증식인자인 Ki-67과의 관계를 조사하여 VEGF 발현은 위암종의 진행과 관련이 있어 예후 인자로서 가치가 있으나, 종양세포의 악성도 표지자는 아니라는 결론을 얻었다. Many studies have shown that angiogenesis plays an important role in the growth, progression and metastasis of malignant tumors. Recently, several angiogenic factors have been identified. VEGF is thought to be a angiogenic factor and is also thought to be a selective mitogen for endothelial cells. The author investigated the correlation between the expression of VEGF and the progression of gastric carcinoma, and between expression of VEGF and index of Ki-67 of gastric carcinoma. The specimens used in this study were 98 cases of gastric carcinoma diagnosed during from 1995 to 1997 at surgical pathology section of Pusan National University Hospital. These specimens were investigated by staining with polyclonal antibody against the VEGF and a monoclonal antibody against the Ki-67. The expression of VEGF was not correlated with type of gastric carcinoma according to Lauren's classification, and not correlated with degree of differentiation of tumor cells. The expression of VEGF was significantly higher in advanced gastric carcinoma than in early gastric carcinoma. The expression of VEGF was not related with index of Ki-67. These findings suggested that expression of VEGF may be a good prognostic indicator for patient with gastric carcinoma but suggested that it may not be an indicator of tumor cell differentiation.
Expression Patterns of Ki-67, Cyclin A, and Cyclin D1 during Tooth Development
Hyuk-Jae Kwon(권혁제),Kyung-Sik Yoon(윤경식),Han-Sung Jung(정한성) 대한체질인류학회 2013 해부·생물인류학 (Anat Biol Anthropol) Vol.26 No.1
치아발생 및 형태형성 과정에서 치아상피와 치아간엽을 구성하는 세포는 동적인 세포주기의 변화가 일어난다. 현재까지 세포증식은 치아발생에 중요한 현상으로 알려져 있지만, 치아발생 중에 일어나는 복잡한 분자적 기전과 연관해서 세포주기의 각 시기가 어떻게 관여하는지에 대해서는 충분한 연구가 이루어지지 않았다. 그러므로 본 연구는 치아발생 기전과 세포주기의 시기의 변화와의 관계를 밝히고자 하였다. 치아발생 과정에서 일어나는 형태변화를 확인하기 위해 싹시기, 모자시기, 종시기의 쥐 앞니 및 어금니 치배를 헤마톡실린-에오신으로 염색하여 조직학적으로 관찰하였다. 또한 세포주기 시기의 표지자인 Ki-67, 싸이클린 A, 싸이클린 D1의 발현양상을 관찰하기 위해 면역조직화학염색을 시행하였다. 싹시기, 모자시기, 종시기에서 증식하는 세포들은 Ki-67과 싸이클린 A를 발현하는 것을 확인하였다. 싸이클린 D1은 앞니의 상아질모세포 및 모자시기의 사기질결절에서 특이적인 발현을 보였으며, 이곳에서는 Ki-67이나 싸이클린 A가 발현되지 않는다는 것을 발견하였다. 본 연구는 치아발생 중 각 주요 시기에서 세포주기의 변화를 관찰하였으며, 이는 치아발생에 관여하는 기전에 대한 중요한 정보를 제공한다. 또한 본 연구의 결과는 지금까지의 앞니의 사기질모세포 및 사기질결절의 특성에 대한 지식을 이해하는 데에 중요한 자료가 될 것으로 사료된다. Dental epithelial and mesenchymal cells that form the teeth undergo dynamic changes in cell cycle during tooth development and morphogenesis. Although proliferation has been known as a key event during odontogenesis, the cell cycle phases and their relations with the complicated molecular mechanisms of tooth development are not fully understood yet. This study comparatively examined the expression patterns of Ki-67, cyclin A, and cyclin D1 during tooth development in the mouse incisor and molar in order to identify the cellcycle characteristics during odontogenesis. We found that Ki-67 and cyclin A were expressed in the proliferating cells in the dental epithelial and mesenchymal tissues at the bud, cap and bell stages. Cycln D1 showed distinct expression in the incisor odontoblast region and the enamel knot, in which Ki-67 nor cyclin A was expressed. Our results provide specific information on the cell cycle phases during tooth development that may provide clues to relate them with the complex odontogenic mechanisms. Furthermore, we suggest that our findings enlightened the previous studies on the incisor odontoblasts and the enamel knot during tooth development.