인간중심주의 교육에 관한 연구

원경렬,이환기 춘천교대 인문사회연구소 1998 人文社會敎育硏究 Vol.2 No.-

누설자속법을 이용한 저장탱크 바닥판재의 부식평가

원순호,조경식 한국비파괴검사학회 2000 한국비파괴검사학회지 Vol.20 No.1

본 연구에서는 누설자속법을 적용한 저장용 탱크 바닥판재의 부식측정 기술에 관한 연구를 수행하였다. 시험편은 두께 6mm 및 10mm 강판에 20%, 40%, 60%, 80%의 깊이를 갖는 홈을 가공한 대비시험편을 사용하였다. 영구자석을 이용하여 요크를 제작하고 홀센서를 이용하여 시험편에서 누설자속을 측정하였다. 실험결과는 인공홈에서 발생된 누설자속을 효과적으로 검출할 수 있다는 것을 보여주었다. 또한 transverse형 홀센서를 이용하여 시험편에 가공한 홈의 크기를 근사적으로 측정할 수 있다는 결과를 제시하였다. 홈의 위치에 따른 누설자속 진폭을 측정한 결과, 누설자속법으로는 판재 상, 하부의 홈 위치를 구별할 수 없다는 것이 밝혀졌고, lift-off 거리에 따라서 진폭이 현저하게 변하기 때문에 고정된 lift-off 거리를 유지하는 것이 중요하다는 사실을 보여주었다. In this research, MFL technique has been studied for the inspection of storage tank floor. The reference specimens having 20%, 40%, 60% and 80% slot's are fabricated using the carbon steel plates of a 6mm and 10mm thick. Powerful permanent magnets and Hall effect sensors are used to this application. It is shown that our system is able to detect metal loss like a slot. Also, it is possible that slot diameter is measured using transverse type of Hall generator. It is demonstrated that MFL can not differentiate between the response from top side and bottom side slot. Flux leakage response from a bottom side indication is significantly lower in amplitude than that from an equivalent top side slot. It is essential to know this sensor lift-off distance because the MFL signal also changes considerably with the sensor lift-off distance.

山田 光의 作品에 관한 硏究

원경환,김도진 홍익대학교 산업디자인 연구소 2003 미술디자인 논문집 Vol.- No.8

Relationship Between Fluid Flow Stability and Submerged Entry Nozzle Port Angle in a Conventional Slab Continuous-Casting Mold

Won‑hyuk Lee,Kyung‑woo Yi 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.10

Fluid flow patterns within a conventional slab continuous-casting mold are closely linked to the port angle of the submergedentry nozzle (SEN). Fluid flow is unstable below a certain port angle, with large fluctuations near the port outlet as wellas jet stream oscillation and repeated vortex formation and dissipation within the mold. However, such phenomena are notobserved above a certain port angle, at which the flow pattern becomes stable. This behavior was investigated via bothnumerical simulation and water model experimentation; two different regions were identified with flow patterns varyingaccording to the SEN port angle. In addition, a close quantitative relationship was identified between changes in the portangle and fluid velocity variations. For SEN port angles in the range 0°–15°, the flow velocity in the upper circulation zoneoscillated in an unstable manner. For port angles of 20° or more, the flow velocity of the same zone decreased significantlyand stabilized. When the gas was injected, the unstable region elongated to 0°–20°. The present study offers insight towarddeveloping a clearer understanding of the complex flow patterns in casting molds, as well as of the conditions necessary forstable flow patterns.

黑陶 가마의 構造에 따른 粘土의 發色硏究

元慶煥 홍익대학교 1998 弘大論叢 Vol.30 No.-

비소세포 폐암에서 COX-2, MMP-9, p53 및 VEGF 발현에 대한 면역조직화학적 연구 : 편평세포암종과 선암종을 대상으로

하경원 외 중앙대학교 의과대학 의학연구소 2007 中央醫大誌 Vol.32 No.3

Purpose: This study was performed to investigate immunohistochemical expression of COX-2, MMP-9 and p53 using surgical specimens of 97 non-small-cell lung cancer cases and to evaluate the relationship between the expression of each molecule and clinicopathologic factors or prognosis. Methods: The following formalin-fixed paraffin embedded surgical specimens were immunohistochemically stained by avidin-biotin complex method for COX-2, MMP-9 and p53; 60 cases of primary squamous cell carcinoma and 37 cases of primary adenocarcinoma of the lung. Results: COX-2 expression of adenocarcinoma is statistically higher than that of squamous cell carcinoma (p<0.01). However, MMP-9, p53 and VEGF expression is not significantly associated with the histologic type of cancer. COX-2 expression was significantly associated with the clinical staging (p<0.05), whereas MMP-9, p53 and VEGF expression were not. Synchronous expression of each molecules (COX-2 + MMP-9 + p53 + VEGF, COX-2 + MMP-9 +p53, COX-2 + MMP-9 + VEGF, COX-2 + p53 + VEGF, COX-2 + MMP-9, COX-2 + p53, MMP-9 + p53, COX-2 + VEGF, MMP-9 + VEGF, p53 + VEGF) was 62.4% in frequency and revealed increased tendency in advanced cancer than early cancer. VEGF expression showed to portend a short survival among patients with non-small cell lung cancer (p=0.05). Conclusion: These results suggested that COX-2 overexpression might be an indicator of an unfavorable clinical outcome and VEGF overexpression appears to portend a short survival. However, further studies of a possibility of prognostic significance, such as MMP-9, p53 and synchronous production of gene products, are required for the determination of significant relationship in other clinicopathologic indices.

태아 간의 혈관속적혈구형성

이원복,류철수,김경용 대한해부학회 1995 Anatomy & Cell Biology Vol.28 No.4

10년의 차이를 가지는 두 시기에서 외과적으로 치료된 조기위암환자들의 임상병리학적 인자들의 변화경향

서경원,윤기영 고신대학교 의과대학 2010 고신대학교 의과대학 학술지 Vol.25 No.2

Backdround: Recently, frequency of early gastric cancer (EGC) is increasing owing to frequent attempt of endoscopy and its developing diagnostic technique. The aim of this study was that how characteristics of EGC change during 10 years to compare several clinicopathological factors. Methods: We studied retrospectively 298 and 255 patients with early gastric cancer who were treated open gastrectomy between January 1984 and December 1992(Early period, EP) and between January 1997 and June 2001(Late period, LP), respectively. We investigated clinicopathologic characteristics of age, gender, location of gastric cancer, size and depth of tumor, differentiation. Results: The ratio of male and female were 187 cases:111 cases(62.8%:37.2%)at EP and 177 cases:78 cases(69.4%:30.6%) at LP, mean age was 52.4years(25-80) at EP , 54.5years(20-77) at LP. Lymph node metastasis of 30 cases at EP(10.0%) and 29 cases at LP(11.4%) were found. The ratio of mucosal cancer and submucosal cancer is 56.7% : 43.3% at EP and 45.1% : 54.9% at LP.(p=0.008) Tumor size above 2cm and below 2cm were 34.2% and 65.8% at EP, 57.6% and 42.4% at LP.(p=0.000) In terms of differentiation according to WHO classification, the change of their ratio were not significant. Conclusion: We treated more cases of mucosal cancer and larger tumor at late period. It is concluded that this trend is owing to introduction of limited surgery. Future studies will be required to establish the treatment strategy of early gastric cancer.

大動與地圖를 통해 본 朝鮮時代 行政區域의 變遷

元慶烈 건국대학교 1988 論文集 Vol.26 No.1

1. Taedong Yo Chido(大東與地圖) is the largest in its scale of all the maps published during the period of Lee Dynasty. The Boundaries of the administrative districts of this map are marked so correctly that it is possible to record the changes of the administrative districts. 2. In 1413(King Taejong(太宗) 13th year), the districts had been divided into eight(8) provinces, in 1895(King Kojong(高宗)35th year) into twenty-three(23) Pus (府), and in 1896 (King Kojong(高宗) 36th year) into thirteen(13) provinces. 3. The boundaries of the administrative districts during Lee Dynasty had been marked according to their mountain ranges rather than rivers. In the densely populated plains, the districts had been subdivided. 4. Such district names as Wol Kyong Cho(越境處), Sok Hyon(屬縣), Pu Kok(部曲) etc. which had Been during the early period of Lee Dynasty ceased to exist as time passed.

위 전절제술 후 발생한 근위부 비장동맥 가성동맥류 1례

서경원,신연명 고신대학교 의과대학 2009 고신대학교 의과대학 학술지 Vol.24 No.2

Splenic pseudoaneurysm following upper abdominal surgery is uncommon but highly lethal complication. Surgical and angiographic interventions are used in treatment; however, optimal therapy remains unclear. We report herein the case of a 37-year-old woman in whom proximal splenic artery pseudoaneurysm ruptured into the small intestine via a fistula, following total gastrectomy. It causes massive bleeding, which was successfully managed by trans-catheter arterial embolization.