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양은수,이상각,Yang, Eun-Su,Lee, Sang-Gak 한국천문학회 1989 天文學論叢 Vol.4 No.1
태양 주위에 있는 만기형 주계열성들의 자전속도 분포와 자전축의 기울기 분포를 조사하였다. 이를 위해 104개의 낱별들과 8개의 Ursa Major Group별들, 그리고 Hyades 성단에 속한 20개의 별들에 대해 각 별들의 자전주기와 반경을 구하였다. 먼저, 별의 자전주기는 대부분 Noyes et al.(1984)의 채충활성도-자전주기 관계식을 이용하여 구했고, 반경은 태양으로부터의 거리가 25pc 이내인 별들을 택해서 Stefan법칙으로 계산하였다. 자전주기와 반경으로부터 결정된 적도자전속도는 0.4<(B-V)<0.8인 별에서는 (B-V)가 증가함에 따라 급격히 감소하고, 기존의 시선자전속도 관측자료에서 이미 밝혀진 위쪽 경계가 나타남과 동시에 아래쪽으로도 자전속도 값의 명확한 경계가 나타났다. 한편, 적도자전속도와 주어진 시선자전속도 값을 비교함으로써 태양 주위에 있는 낱별들의 자전축의 기울기를 구할 수 있었는데, 계산된 기울기는 은위에 무관한 멋대로분포를 따른다는 것을 알 수 있었다. The rotational properties of late-type main sequence stars in the solar neighborhood have been investigated. So rotation periods and stellar radii are determined for 104 field stars, 8 Ursa Major Group stars, and 20 Hyades cluster stars. Most of the rotation periods are derived using the Noyes et al. (1984)'s relation between chromospheric activity and rotation period. Stellar radii are calculated by the Stefan law for the nearby stars within 25 pc from the sun. Rotational velocities at equator are determined by the above rotation periods and stellar radii. Their distribution along the (B-V) color shows an upper boundary and an abrupt drop for the stars in the range of 0.4<(B-V)<0.8, as found from the apparent rotational velocity data. Furthermore, it is apparent that there is an lower boundary of rotational velocity. The inclination of rotation axis to line-of-sight is obtained by comparing the rotational velocity at equator with the apparent rotational velocity given by the analysis of the line profiles. For the field stars, it is found that the inclination has no correlation with the galactic lattitude and follows random distribution.
양은수(Eun Soo Yang),박태준(Tae Joon Park),박태군(Tae Gun Park),류종철(Jong Cheol Ryu),신원창(Won Chang Shin),최원충(Won Choong Choi),이진호(Jin Ho Lee),김관엽(Kwan Yup Kim) 대한소화기학회 1994 대한소화기학회지 Vol.26 No.2
The double pylorus is a fistulous communication between the gastric antrum and duodenal bulb. Although its incidence is rare, reports concerning double pylorus are increasing with the recent development of upper gastrontestinal endoscopy. In most instances, it is believed to be a complication of peptic ulcer disease. We recently experienced a case of double pylous in 63- year old male presenting as epigastric pain and melena. Endoscopy revealed an ulcer on the lesser curvature side of gastric antrum and the opening of gastroduodenal fistula within the antral ulcer. We showed the fistula connecting antral ulcer with the duodenal bulb by passing the cathter through it. W e reported this case as a double pylorus accompanied by gastric an- tral ulcer with review of the literature. (Korean J Gastroentero11994; 26: 343 347)
박태준,양은수,류종철,박태군,이희승,신원창,이진호,김관엽 인제대학교 1994 仁濟醫學 Vol.15 No.1
1989년 9월부터 1993년 7월까지 인제대학교 의과대학 상계백병원에서 실시한 위내시경 소견이 조기위암이며 내시경 직시하 생검결과 선암으로 판명되어, 근치적 위절제술을 시행받은 23명의 환자에서 임상적 특징을 알아보고, 문헌고찰과 함께 보고하는 바이다. The incidence and mortality rate of stomach cancer ranks well ahead of all malignancies in Korea. The prognosis is excellent in early gastric cancer of which the overall 5 years survival rate of 85∼95% is comparative with that of advanced gastric cancer of 15∼49%. So early detection with very sensitive mordality of gastroscope and surgery is the only premise to decrease the mortality rate of gastric cancer. This report deals with the clinical aspects of 23 cases of early gastric cancer, which were confirmed with histopathologic examination of resected stomach during the 4 years from September 1989 to July 1993 at Sanggye Paik hospital, Seoul, Korea. Out of 23 cases of early gastric cancer, 14 cases were male, 9 cases were female, and the male to female ratio was 1.6 : 1. The most common type of early gastric cancer was talc type(43.5%), IIc and its combined type comprised most of them(87.0%). The most prevalent sloe of lesion was gastric angle(43.5%) and the most common direction was lesser curvature(73.9%) 19 cases of 23(78.3%) were between 1∼3cm in size, and there was no statistical significance between the size of the lesion and lymph node metastasis. Of the 9 cases with mucosal lesion, there were 2 cases with lymph node metastasis(22.2%), but 7cases(50.0% ) of 14 cases with submucosal lesion presented lymph node metastasis. Diagnostic accuracy of endoscopy on detection of early gastric cancer was 17 cases(73.9%) of total 23 cases in our study. As with other report, histopathulogic examination of resected stomach revealed adenocarcinoma, tubular type as the most common type. Frequent complaint of patients with early gastric cancer was epigastric pain(65.2%), and duration of the symptom was less than 12 months in 17 cases(73.1%) of 23 patients with early gastric cancer.