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Clinical characteristics of brain metastasis form ovarian cancer: A study of 51 cases
( Yeon Sik Na ),( Dea Yeon Kim ),( Yong Man Kim ),( Young Tak Kim ),( Joo Hyun Nam ),( Jong Hyeok Kim ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.98 No.-
The aim of this report is to describe the characteristics, pathologic features, treatments and survival of patients with brain metastasis from ovarian cancer at our single institution. Between January, 1989 and April, 2011, a total of 4625 women with ovarian cancer were evaluated at Asan Medical Center. A total of 71 patients were identified using the ICD-10 code for malignant neoplasm of ovary, cross-matched with the medical records for brain metastasis. Patients with other synchronous primary tumor were excluded. The clinical and pathologic characteristics, treatment and outcome of patients with brain metastases from epithelial ovarian carcinoma were analyzed using SPSS 12.0.using SPSS 12.0. The incidence of brain metastasis from ovarian cancer in our population was 1.1%(51/4625). The median survival from the diagnosis of brain metastases was 7 months (range: 0-72). Prior cancer relapse before the diagnosis of brain metastases, and multimodal treatment were related to the duration of survival. Although the prognosis for patients with brain metastases from epithelial ovarian carcinoma is generally poor, palliative therapy may offer symptomatic relief and improvement in the quality of life on ovarian cancer patients with brain metstasis.
Stent graft treatment of an ilioenteric fistula secondary to radiotherapy: a case report
( Joo Yeon Jang ),( Ung Bae Jeon ),( Jin Hyeok Kim ),( Tae Un Kim ),( Jae Yeon Hwang ),( Hwa Seong Ryu ) 영남대학교 의과대학 2022 Yeungnam University Journal of Medicine Vol.39 No.1
Fistulas between the arteries and the gastrointestinal tract are rare but can be fatal. We present a case of an ilioenteric fistula between the left external iliac artery and sigmoid colon caused by radiotherapy for cervical cancer, which was treated with endovascular management using a stent graft. A 38-year-old woman underwent concurrent chemoradiotherapy for cervical cancer recurrence. Approximately 9 months later, the patient suddenly developed hematochezia. On her first visit to the emergency room of our hospital, computed tomography (CT) images did not reveal extravasation of contrast media. However, 8 hours later, she revisited the emergency room because of massive hematochezia with a blood pressure of 40/20 mmHg and a heart rate of 150 beats per minute. At that time, CT images showed the presence of contrast media in almost the entire colon. The patient was referred to the angiography room at our hospital for emergency angiography. Inferior mesenteric arteriography did not reveal any source of bleeding. Pelvic arteriography showed contrast media extravasation from the left external iliac artery to the sigmoid colon; this was diagnosed as an ilioenteric fistula and treated with a stent graft. When the bleeding focus is not detected on visceral angiography despite massive arterial bleeding, pelvic arteriography is recommended, especially in patients with a history of pelvic surgery or radiotherapy.
김혁연 ( Hyeok Yeon Kim ) 충남대학교 교육연구소 2009 교육연구논총 Vol.30 No.2
이 연구에서는 지식 기반 경제에 적극적으로 대응하고 국가 경쟁력 제고를 위하여 최근 OECD를 중심으로 전개되고 있는 학습도시 사업과 학생의 학업성취도에 대하여 논의하였다. 선진국에서는 학습도시를 지역 경쟁력 강화와 지역 혁신을 위한 핵심 전략으로 인식하고 궁극적으로는 국가 경쟁력 제고를 목적으로 적극 추진하고 있는데, 미래의 국가 경쟁력은 현재의 학생들의 능력이라고 볼 수 있다. 이러한 측면에서 최근에는 OECD의 PISA가 주목받고 있는데, PISA는 사고력, 창조성, 문제해결 능력, 사회 참여 능력 등을 측정하는 국제학업성취도 비교연구이다. 따라서 학습도시와 학업성취도에 대하여 알아보기 위하여 학습도시 활성화 정도 및 PISA 결과를 조사한 후에 이론적 고찰 및 통계적 접근을 통해서 양자에 대한 탐색적 연구를 실시하였다 연구 결과 학습도시는 가정의 사회경제적 배경에 영향을 주고 결과적으로 학생의 학업성취도에 많은 영향을 준다고 볼 수 있었다. 아울러 통계적 접근 방법으로 상관분석 및 회귀분석을 실시하였는데, 학습도시는 학업성취도에 긍정적인 영향을 주고 있음을 알 수 있었다. The learning city has a aim of developing knowledge-based economy and national competitiveness. This study was performed to consider the learning city and the student assessment in all bearings. As you know, the important goal of learning city is to improve the level of a national competitiveness. It is thought that the possibility of the future is depended on the present abilities of student. In this respect, OECD countries has attention of Program for International Student Assessment(PISA) because PISA measures thinking, creativity, problem-solving skills and ability to participate in society. This study used PISA`s result for measuring student assessment and a national competitiveness. And this study used the activated level of learning city and the result of PISA. It was concluded that the learning city has an affirmative influence on the student abilities.
교원보수의 직능급,실적급 준거 탐색 및 적용 가능성 논의
김혁연 ( Hyeok Yeon Kim ) 충남대학교 교육연구소 2010 교육연구논총 Vol.31 No.1
이 연구에서는 교원의 전문성·생산성을 높일 수 있는 교원보수체계의 개선 방안으로, 직능급과 실적급 준거들을 집중적으로 고찰하였다. 연구 내용으로는 첫째, 직능급과 실적급의 명확한 개념을 정의하고, 국내에서 실시되거나 논의되고 있는 준거들을 직능급과 실적급으로 분류하였다. 둘째, 국내·외의 선행연구와 사례를 바탕으로 실천 가능성을 높일 수 있는 준거들을 제시하였다. 셋째, 직능급·실적급 준거들의 실천 가능성을 높일 수 있는 선행조건들을 제시하였다. 교원의 전문성·생산성을 높일 수 있는 보수체계로의 전환에 대한 인식은 상당히 긍정적이었다. 따라서 이 연구에서 제시한 선행조건을 시작으로 실천 가능성을 높일 수 있는 방안들부터 우선적으로 실시해야 할 것으로 보인다. In this study, we considered the criteria of the wages on job evaluation and the performances by the ways for the improvement of Teacher`s Compensation Criteria Structure increasing teacher`s professionalism and productivity. First, we found the accurate concept of the wages on job evaluation and the performances. Second, based on the preceded studies and cases at home and abroad, we presented the criteria to raise the possibility of practice. Lastly, we presented the preceding conditions to raise the possibility of practice about the criteria of the wages on job evaluation and the performances. As a result, the recognition that we should change the Teacher`s Compensation Criteria Structure to increase teacher`s professionalism and productivity was considerably positive. Therefore it seemed that we should conduct the ways to raise the possibility of practice preferentially by beginning the preceding conditions indicated in this study.
나일론선 절단방식 6U 큐브위성용 태양전지판 구속분리장치의 기능검증
박연혁(Yeon-Hyeok Park),고지성(Ji-Seong Go),채봉건(Bong-Geon Chae),이성호(Seong-Ho Lee),오현웅(Hyun-Ung Oh) 한국항공우주학회 2018 韓國航空宇宙學會誌 Vol.46 No.10
종래의 큐브위성용 나일론선 절단방식 태양전지판 구속분리장치는 단순히 패널 평면상에 나일론선을 체결함에 따른 취약한 구속력으로 인해 태양전지판 면적이 증가함에 따라 발사하중에 대한 구조 건전성 확보에 한계가 존재한다. 본 연구에서는 전술한 종래 분리장치의 한계점 극족을 위해 Ball & Socket 접속부가 반영된 별도의 타원형 브라켓을 적용하여 높은 구속력, 전개 및 평면 방향 동시구속 및 체결작업의 용이성 등의 장점을 갖는 6U 큐브위성용 태양전지판 구속분리장치를 제안하였다. 상기 구속분리장치의 설계 방향성 파악을 위해 큐브위성용 태양전지판 조림체에 대한 발사하중을 고려한 구조해석을 실시하였다. 또한, 상이한 온도조건에서의 나일론선 두께 및 체결횟수에 따른 기능시험을 수행하여 제안된 구속분리장치의 유효성을 검증하였다. Conventional nylon wire cutting-type holding and release mechanisms (HRMs) are limited to securely hold the solar panel launch environment as the size of the panel increases because the nylon wire is tightened directly on the surface of the solar panel. In this study, we proposed a nylon wire cutting-type HRM for 6U CubeSat’s solar panel applying elliptic-shaped bracket with a Ball & Socket interface. The proposed HRM has the advantage of higher holding capability along in-plane and out-of plane directions of solar panel and simplicity in tightening process of nylon wire. The design drivers of structural design of CubeSat’s solar panel with the proposed HRM were defined by structural analysis under launch loads. In addition, The design effectiveness of the proposed HRM was verified through the functional tests according to the thickness of nylon wire and the number of wore winding under various temperature conditions.