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FEM.SEA기법을 이용한 흡.차음재의 음향 변수의 차량실내음압에 미치는 영향에 관한 연구
김관주(Kim, Kwan-Ju),이근호(Lee, Geun-Ho),김현준(Kim, Hyun-Jun),이원구(Lee, Won-Ku) 한국소음진동공학회 2009 한국소음진동공학회 논문집 Vol.19 No.4
In establishing silent environment such as automobile and industrial instrument, the roles of the insulating materials are critical. The proper and effective positioning of insulating materials is essential in the field of noise as well as in designing silent automobile. In this paper, we proposed the systematic and efficient scheme for optimizing complete automotive interiors for noise control. In order to attain this purpose, following analysis has been carried out: First, measuring the Biot parameters of insulating materials and the transmission loss with reflecting the appropriate arrangement of insulating materials has been experimented. In addition, we made comparison among transmission loss by the tools of analysis and verification, experimental value under consideration of various situations of automobile and analysis by the SEA.
이관주(Kwan Ju Lee),김세준(Say June Kim),이상철(Sang Chul Lee),이동호(Dong Ho Lee),유영경(Young Kyoung You),안창준(Chang Joon Ahn),김종옥(Jong Ok Kim),김정구(Jeong Goo Kim) 대한외과학회 2008 Annals of Surgical Treatment and Research(ASRT) Vol.74 No.1
Spontaneous venous thrombosis developing in the internal jugular vein is very unusual. The common causes usually include intravenous drug abuse, jugular vein catheterization, neck dissection, a hypercoagulable state associated with malignancies, neck injury or ovarian overstimulation syndrome. A 30-year-old woman with no remarkable past medical history visited our outpatient office due to neck swelling with pain. She underwent CT scan, Doppler sonogram and fine needle aspiration biopsy. We could confirm metastatic lymphadenopathy and internal jugular vein thrombosis. We present here the case of internal jugular vein thrombosis associated with metastatic malignancy.
미세침흡인으로 얻은 갑상선 유두암 세포에서 p27 발현과 경부림프절 전이의 연관성
이관주,이정의<SUP>1<,SUP>,김정수,김태규<SUP>2<,SUP>,이상철,김정구,안창준,김세준,이동호,Kwan Ju Lee,M,D,Jung Hea Lee,M,D,<SUP>1<,SUP>,Jeong Soo Kim,M,D,Tai Gyu Kim,M,D,<SUP>2<,SUP>,Sang Chul Lee,M,D,Jeong Goo Kim,M,D,Chang-Joon 대한갑상선-내분비외과학회 2009 The Koreran journal of Endocrine Surgery Vol.9 No.3
Purpose: The p27 gene as a tumor suppressor gene is associated with colorectal cancer, gastric cancer and breast cancer. Some studies have shown a relationship between the underexpression of p27 and lymph node metastasis in papillary thyroid carcinoma. The aim of this study is to evaluate the relationship between a p27 expression of the papillary thyroid cancer cells obtained by fine needle aspiration (FNA) and cervical lymph node metastasis. Methods: This study included 60 patients with papillary thyroid cancer and who underwent total thyroidectomy or lobectomy. Central lymph node dissection was routinely done. Out of these patients, 30 patients underwent a FNA procedure during the operation. Immunohistochemical staining for p27 antibody was performed on the papillary thyroid cancer tissues and cells. Results: Cervical lymph node metastasis is correlated with the tumor size and lymphovascular invasion (P<0.001). The underexpression of p27 for the papillary thyroid cancer tissues and cells was associated with lymph node metastasis (P=0.009). Conclusion: An evaluation of the p27 expression for the papillary thyroid cancer cells obtained by FNA may be useful as a predictor for lymph node metastasis before surgery. (Korean J Endocrine Surg 2009;9:155-160)
이관주(Kwan Ju Lee),김세준(Say June Kim),이상철(Sang Chul Lee),김정구(Jeong Goo Kim),이동호(Dong Ho Lee),안창준(Chang Joon Ahn),김종옥(Jong Ok Kim),유영경(Young Kyoung You) 대한외과학회 2008 Annals of Surgical Treatment and Research(ASRT) Vol.74 No.2
Lymphangiomas are rare benign cystic tumors and they are most often located in the head, neck, and axilla in pediatric patients. The etiology of mesenteric cystic lymphangioma is unknown and the clinical presentation is diverse, ranging from an asymptomatic abdominal tumor to symptoms of an acute abdomen. A 16-year-old male patient presented to the Emergency Department complaining of an increasingly painful abdominal mass. He hit his abdomen against friend’s knee during playing soccer. CT scan showed a mesenteric cystic mass that looked like hematoma. Under the diagnosis of a mesenteric hematoma, he underwent emergency laparotomy. The mass in the mesentery was removed. Mesenteric cystic lymphangioma with hemorrhage was confirmed by the pathologic result. We present here a case of a mesenteric cystic lymphangioma with post-traumatic hemorrhage.
이관주,주영환,Lee, Kwan Ju,Chu, Young Hwan 한국전기화학회 2014 한국전기화학회지 Vol.17 No.2
바나듐 레독스 흐름 전지 (Vanadium redox flow battery, VRB) 시스템 운전 중 양이온 교환막을 통한 바나듐이온의 투과로 인하여 성능이 저하되는 문제점을 보완하기 위해 판상형태의 탄소물질인 산화그라핀 (Graphene Oxide, GO)을 기존에 사용하였던 양이온 교환막인 Nafion 양이온 교환막 표면에 열압착 방식으로 코팅하여 양이온 교환막 개선 및 VRB 성능 향상을 도모하였다. 개선된 양이온 교환막의 물리화학적 특성분석을 위하여 SEM (Scanning Electron Microscopy)분석, 이온 교환 용량, 수분 흡수 및 수소이온 전도도를 측정하였다. 산화그라핀층을 코팅한 결과, SEM 분석을 통해 양이온 교환막 표면에 약 $0.93{\mu}m$의 산화그라핀층이 형성된 것을 확인할 수 있었다. 산화그라핀을 코팅하여 개선된 양이온 교환막의 수소이온 전도도 측정 결과, 상용 양이온 교환막의 27% 수준으로 감소하였음을 확인하였으며, 동시에 바나듐이온 투과실험을 실시한 결과, 개선된 양이온 교환막의 바나듐이온 투과도가 기존 상용 양이온 교환막의 25% 이하 수준으로 감소하였음을 확인할 수 있었다. VRB 단위전지 성능실험을 실시하여 충-방전 특성을 분석한 결과, 산화그라핀을 코팅하여 개선된 양이온 교환막을 VRB 시스템에 적용하였을 경우, 바나듐이온의 투과도 감소로 인하여 쿨롱효율이 증가하였음을 확인할 수 있었고, 그로 인하여 전체적인 에너지효율이 상용막을 적용하였을 때 보다 증가하였음을 확인할 수 있었다. 따라서, 본 연구를 통해 양이온 교환막 표면에 판상형태의 탄소물질인 산화그라핀을 코팅하는 방법이 바나듐이온 투과도를 저하시키고 VRB의 시스템성능을 향상시킬 수 있는 효과적인 방법임을 제시할 수 있었다. Cation exchange membrane (Nafion) was modified to reduce the vanadium ion permeation through the membrane and to increase the vanadium redox flow battery (VRB) system performance by coating the graphene oxide (GO) which has nano-plate like morphology. Modified membrane properties were studied by measuring the ion exchange capacity (I.E.C), water uptake and proton conductivity. The thickness of the coated layer on the surface of the Nafion membrane was observed as $0.93{\mu}m$ by SEM. Proton conductivity and vanadium ion permeability of the modified membrane were decreased to 27% and 25% compared to that of the commercial Nafion membrane respectively. VRB single cell performance test was performed to compare the system performance of the VRB applied with commercial Nafion membrane and modified membrane. VRB system applied with modified membrane showed higher coulombic efficiency and energy efficiency than the VRB system applied with the commercial Nafion membrane due to the reduction of the vanadium ion permeation. From these result, we could suggest that the membrane modification by coating the GO on the surface of the Nafion membrane could be one of the promising strategies to reduce the vanadium ion permeation and to increase the VRB system performance effectively.
유두상 갑상선암에서 종양의 크기에 따른 중앙 경부림프절 전이 및 이와 관련된 인자에 대한 비교분석
이관주(Kwan Ju Lee),김형래(Hyung Rae Kim),김세준(Say June Kim),이상철(Sang Chul Lee),김정구(Jeong Goo Kim),성기영(Gi Young Sung),박우찬(Woo Chan Park),오세정(Se Jeong Oh),안창준(Chang Joon Ahn),이동호(Dong Ho Lee) 대한외과학회 2008 Annals of Surgical Treatment and Research(ASRT) Vol.75 No.3
Purpose: The aim of this study was to analyze the relationship between central lymph node metastasis and the associated factors in patients with papillary thyroid carcinoma (PTC) according to the tumor size, and we wanted to determine an appropriate treatment for PTC. Methods: From June 2005 to May 2007, 218 patients with PTC underwent total thyroidectomy or lobectomy, and they also received central lymph node dissection at our institution. The patients were divided into three groups: group 1 (tumor ≤5 ㎜), group 2 (5 ㎜<tumor≤10 ㎜), and group 3 (tumor>10 ㎜). We retrospectively reviewed these patients to analyze the relationship between tumor size and the clinicopathological characteristics, including age, gender, lymph node metastasis, extrathyroidal extension, capsular invasion and lymphovascular invasion. Results: There were 47 (21.6%) patients in group 1, 101 (46.3%) patients in group 2 and 70 (32.1%) patients in group 3. The tumor size was closely correlated with the presence of extrathyroidal extension, capsular invasion and lymph node metastasis (P<0.001). Lymph node metastasis was not only closely correlated with tumor size, but it was also significantly associated with extrathyroidal extension, capsular invasion and lymphovascular invasion (P<0.05). Conclusion: Our study confirmed that some factors, including central lymph node metastasis, capsular invasion and extrathyroidal extension, were frequently observed in patients with papillary thyroid microcarcinoma (PTMC), and central lymph node metastasis was related to tumor size, extrathyroidal extension, capsular invasion and lymphovascular invasion. Therefore, routine central lymph node dissection is reco㎜ended during the initial surgery for patients with PTMC.
이관주,정재희,홍민광,원용성,안창혁,송영택,Lee, Kwan-Ju,Chung, Jae-Hee,Hong, Min-Kwang,Won, Yong-Sung,An, Chang-Hyeok,Song, Young-Tack 대한소아외과학회 2001 소아외과 Vol.7 No.2
Childhood intussusception is usually idiopathic, and pathological lesions as the leading point are found in limited cases. Sixteen operative cases with leadpoints among 2,889 cases of childhood intussusecption treated at the surgical departments of the affiliated hospitals of Catholic University over 19 years are reviewed. The approximate incidence of pathological lesions as the leading point was 0.6%. The male to female ratio was 2:1. The mean age was 3.5 years. There was not an age preponderance. The symptoms were vomiting(63%), abdominal pain(38%), irritability(38%), bloody stools(25%), fever(25%) and abdominal mass(6%). The average duration of the symptoms was 2.4 days(1-10days). The most common lesion was Meckel's diverticulum, followed by malignant lymphomas, polyps, ectopic pancreas, and cecal duplication. An ileocolic type was most frequent, followed by ileoileocolic and ileoileal. Segmental resection or wedge resection of the ileum was done in 10 cases, ileocecectomy in 3, and right hemicolectomy in 3. Surgical reduction was done only in an ectopic pancreas, with no later recurrence. The average hospital stay was 10 days. Postoperative adhesive ileus occurred in two cases, and in one of them adhesiolysis was performed. One case of malignant lymphoma died at 28 days after surgery due to chemotherapy related complication.
타일드 디스플레이에서의 천리안 해양관측 위성영상을 위한 다중 입력 장치 및 멀티 스케일 인터랙션 설계 및 구현
박찬솔,이관주,김낙훈,이상호,서기영,박경신,Park, Chan-Sol,Lee, Kwan-Ju,Kim, Nak-Hoon,Lee, Sang-Ho,Seo, Ki-Young,Park, Kyoung Shin 한국정보통신학회 2014 한국정보통신학회논문지 Vol.18 No.3
본 논문은 타일드 디스플레이에서 여러 사용자들이 천리안 해양관측 위성영상을 관측 및 분석하기 위하여 다중 입력 장치를 활용한 멀티스케일 인터랙션 기반의 가시화 시스템을 설명한다. 이 시스템은 멀티터치 스크린, 키넥트 동작 인식, 모바일 인터페이스를 제공하여 여러 사용자들이 타일드 디스플레이 화면에 근접하거나 원거리에서 다양한 인터랙션을 통하여 한반도 중심의 해양 환경 및 기후 변화 정보를 효과적으로 관측할 수 있다. 천리안 해양관측 위성영상은 고화질의 메모리양이 많아서 원본 영상을 작은 영상으로 분할한 멀티레벨 이미지 로드 기법을 사용하여 시스템의 부하를 줄이면서 사용자의 다양한 조작에서 타일드 디스플레이 화면에 매끄럽게 출력되도록 하였다. 이 시스템은 다중 사용자의 키넥트 제스처와 터치 포인트 입력 및 모바일 장치로 부터 입력된 정보를 일반화 처리하여 타일드 디스플레이 응용프로그램에 공통적으로 활용 가능한 다양한 인터랙션을 지원하였다. 또한 특정 날짜에 해당하는 시간 단위의 해양관측 위성 영상이 순차적으로 화면에 출력되며, 여러 사용자들이 동시에 위성영상을 자유롭게 확대 축소하고 상하좌우로 이동하며 다양한 기능의 버튼을 누르는 등의 인터랙션을 할 수 있도록 하였다. This paper describes a multi-scale user interaction based tiled display visualization system using multiple input devices for monitoring and analyzing Geostationary Ocean Color Imager (GOCI) observation satellite imagery. This system provides multi-touch screen, Kinect motion sensing, and moblie interface for multiple users to control the satellite imagery either in front of the tiled display screen or far away from a distance to view marine environmental or climate changes around Korean peninsular more effectively. Due to a large amount of memory required for loading high-resolution GOCI satellite images, we employed the multi-level image load technique where the image was divided into small tiled images in order to reduce the load on the system and to be operated smoothly by user manipulation. This system performs the abstraction of common input information from multi-user Kinect motion and gestures, multi-touch points and mobile interaction information to enable a variety of user interactions for any tiled display application. In addition, the unit of time corresponding to the selected date of the satellite images are sequentially displayed on the screen and multiple users can zoom-in/out, move the imagery and select buttons to trigger functions.