3個 山林地域의 이슬의 酸性度 및 化學的 特性의 比較 : 서울, 龍仁, 平昌 地域을 中心으로 Mt. Nam in Seoul; Shingal, Yongin; Hangdong, Pyungchang

金英彩,鄭東浚,金洪律 한국농림기상학회 2000 한국농림기상학회지 Vol.2 No.2

This study was carried out to compare pH and chemical properties of dew in three forest stands(Mt. Nam-Seoul, Shingal-Yongin, Hangdong-Pyungchang)from May, 1998 to September, 1999. The results of this study were as follows; The acidity of dew in Seoul, which has a metropolitan environment, measured pH5.57±0.41. The highest acidity was measured in Yongin(pH5.50±0.96), while pH in Pyungchang was 6.36±0.57. Ion concentration in Pyungchang was lower than in other two regions, with a similar tendency of seasonal cation changes to those in Seoul and Yongin. Anion changes in Pyungchang, however, was inconsistent with those in other two regions. Although analyses of correlation coefficients showed that there was no significant correlation between overall ion concentrations and pH of dew, there was highly significant correlations between some cations and anions in Seoul and Yongin, leading a suggestion that those ions were coupled from one source.

RBL-2H3 세포에서 Spermine에 의한 히스타민 유리와 칼슘유입에 미치는 상백피의억제효과

채옥희,강경진,신인호,김영기,이무삼,전병득 대한해부학회 1994 Anatomy & Cell Biology Vol.27 No.2

소나무-참나무 천연혼효림에 있어서의 수분 경쟁에 관한 연구

정동준,전상근,김영채 경희대학교 생명자원과학연구원 2000 硏究論文集 Vol.21 No.-

This study is to rationalize the forest management practice based upon the growth and water competition of pine-oak natural mixed forest stands in central part of South Korea. Average volume is 259.3 m^(3)/ha for pine stands and 150 m^(3)/ha for mixed pine stands, whereas 206.5 m^(3)/ha for pure oak stands, and 71.7 m^(3)/ha for mixed oak stands. Quadratic mean diameter and quadratic mean height, basal area, and volume decrease as the direction moves from north to south, whereas the values peak at south slope and hit the lowest at the north for oak stands. The maximum water potentials measured between 12 and 14 oclock was analyzed by stand and altitude, and by direction in case of mixed stand. Water potential of pine showed higher in both pure stands and mixed stands than oak. Especially the water potential of oak in muted stands was 3 MPa, which was lower than that of pines, -2.7 MPa. The value of two species increased as the altitude gets lower. Pine has 3.2 MPa at higher altitude, -2.4 MPa at lower altitude, which are much higher than those of oak, 3.4 MPa and 2.9 MPa at higher and lower altitudes. Soil water content was high m oak pure stands than pine pure stands or mixed stands Soil water content for each direction in mixed stands tended to decrease as slope goes from north to south. Interspecific water potential and the soil moisture content turned out to be highly correlated. Under the same soil moisture content, water potential of oak was lower that that of pine. Therefore, it seems that both pine and oak have high moisture requirement in the highly competitive southern slope and oak has higher moisture requirement than pine. It is concluded that, oak is in much competitive position than pine in terms of water competition.

유전자 알고리즘을 이용한 에이전트 멀티캐스팅 기법

이기준,강경아,정채영 조선대학교 통계연구소 2000 統計硏究所論文誌 Vol.2 No.1

하나의 작업지점에서 그룹의 다름 멤버들에게 다중으로 데이터 전송하기 위하여 point-to-point네트워크의 multicast tree를 이용하여 구현할 수 있다. 이러한 최소화 Steiner tree를 사용한 multicast 기법은 그룹에 대하여 하나의 Steiner tree를 이용할 수 있다는 장점을 지니고 있다. 따라서 최소화된 Steiner tree를 작성하는 것은 NP-Complete 문제와 효율적인 알고리즘을 작성하는데 필수적인 문제이다. 본 논문에서는 최소화된 Steiner tree를 찾는 에이전트와 유전자 알고리즘에 대하여 기술하고자 한다. 에이전트는 노드들 사이의 가중치를 검사하고 유전자 알고리즘에 이를 전송하다. 그리고 유전자 알고리즘 이 가중치와 최적화 Steiner tree 검색작업을 시도하여 Steiner tree를 작성한다. 본 논문에서는 전형적인 유전자알고리즘에 적용된 이진 스트링(DNA)의 특징을 가진 트리기반의 genetic encoding 방법을 기술하고 이에 대한 유용성을 보이고자 한다. Multicasting transfer data from one point to the members of groups. which can be supported by using multicast tree in point-to-point network. For multicast routing a minimal steiner tree is used, and has an advantage in that only one Steiner tree is needed for a group. However, finding a minimal Steiner tree is an NP-complete problems and it is necessary to develop efficient heuristic algorithms. In this paper, we present agents and genetic algortihms for a finding minimal Steiner tree. Agents check weights among nodes and transmit these to genetic algorithms. Then, genetics algorithms build Steiner trees with these weights and try to find a optimal Steiner tree. This paper describes a tree-based genetic encoding scheme which is in sharp contrast with binary string representations usually adopted in conventional genetic algorithms, and shows the efficiency of this scheme through experiments.

요꼬가와吸蟲症 治療에 있어서 Praziquantel(Distocide^(�))의 效果

李純炯,蔡鐘一,洪性琮,全英淑,徐丙卨 대한화학요법학회 1984 대한화학요법학회지 Vol.2 No.2

國産 praziquantel(Distocide^(ⓡ))의 요꼬가와吸蟲感染에 대한 治療效果를 알아보기 위하여 전라남도 강진군 탐진강 流域의 住民 중에서 68名의 蟲卵陽性者를 색출하고 體重당 100㎎/㎏의 praziquantel을 單回 투여한 후 70일에 追跡大使檢査를 실시하여 驅蟲效果를 判定하였다. 結果는 다음과 같다. 1. 총 45名의 追跡檢査者 중 41名이 蟲卵陰轉되어 91.1%의 治療率(care rate)을 보였으며 이들의 投藥前 E.P.G 合計가 125,600이었던 것이 投藥後 800으로 減少되어 99.4%의 蟲卵率을 보였다. 2. 驅蟲效果는 投藥前 感染强度(E.P.G)에 따라 다소 다른 것으로 나타났으며 輕感染者일수록 높은 效果를 보였다. 3. 藥劑服用에 의한 副作用은 2例에서 가벼운 頭痛이나 현기증을 호소한 이외에는 전혀 문제되지 않았다. 이상의 結果로 볼 때 國産 praziquantel(Distocide^(ⓡ)) 요꼬가와吸蟲症에 대하여 10㎎/㎏ 單回投與로 매우 우수한 驅蟲效果를 보이는 것이 立證되었고 效果, 投藥法, 副作用 등을 감안할 때 집단치료 약제로서 손색이 없을 것으로 생각되었다. Fraziquantel(Cistocide", Chinpoc:-g Pharm. Co). a 'croad spectrum anthelmintic zgzirs: tremato6es and cestodes, ~ 5 - i - a ~ tested for its efficacy In treatment of A!letclgonin.zis yok~govias infection. during the priod fron? Jzmsry t o Ajmi. 1984. A total of 68 egg ~ o s i t i r e cases TTES selected from the inhabitants of Kangjin-gun, South Choila Do, 2nd treated a i t h lOmg/kg ?x<:- weight of I;raziquar.te! in single dose. Among them 25 heavy infection cases were purged ~ i t l 20-20g of magnesium sulfzte(MIgS04) one hour after the treatrcent. Follow up stool exammztion was done after 70 days and the drug efficacy was estimated in terms of cure(=egg negati7-e conversion) and egg reduction rates. The results were as follows: 1. AIiong 45 follm- up cases 41 were cured(91.1% in cure rate) and the pre-treatment E.P. G.(eggs per gram of feces). 125,600, was reduced to 800 after the treatment(gg.4X in egg reduction rate). 2. The cure rates x-ere dependent upon the degiee of E.P.G.; the lower the intensity of infection before treatment, the higher the cure rate was obtained. 3. There x-ere nearly no side effects due t o drug administration except f o r slight degree of headache and dizziness in 2 cases. From these results, it is concluded that lOmg/kg single dose of praziquantel (Distocide") is highly recommendable in treatment of M. gokogawat infection.

급성 신우신염이 선행된 Escherichia coli 농흉 1예

차치운,조준형,김미진,오윤정,연재우,이성규,오미정,채지영,김수연 대한감염학회 2009 감염과 화학요법 Vol.41 No.5

We experienced a case of acute pyelonephritis which progressed to Escherichia coli bacteremia and later complicated by empyema in a 65-year-old female. She was successfully treated with intravenous antibiotic therapy and percutaneous drainage of empyema.

형상인식을 위한 신경망 기법의 비교에 관한 연구

강경아,이기준,정채영 조선대학교 통계연구소 1999 統計硏究所論文誌 Vol.1 No.1

In this paper, implemented the algorithms that recognize the image learning the standard data by Back propagation and Hopfield network of neural network Back propagation learning method needs more hours in carrying out one-time learning due to the hopfield algorithm, but in the rate of detection per learning frequency, back propagation shows an excellence. Back propagation learning algorithm requires 25 seconds to obtain the rate of 97% detection of the image, but to detect the image over 99%, the time of 1 minute and 20 seconds is required and while the rate of image recognition is very high in initial learning, it is delayed from over 97%. To the contrary, in the case of hopield network, more hours are required to recognize 97% of the image than back propagation, but in recognizing the image over 99%, it requires shorter hours than back propagation.

A comparative study of postoperative pain for open thyroidectomy versus bilateral axillo-breast approach robotic thyroidectomy using a self-reporting application for iPad

Young Jun Chai,Junho Song,Jiyoung Kang,Jung-Woo Woo,Ra-Yeong Song,Hyungju Kwon,Su-Jin Kim,June Young Choi,Kyu Eun Lee 대한외과학회 2016 Annals of Surgical Treatment and Research(ASRT) Vol.90 No.5

Purpose: Postoperative pain for robotic thyroid surgeries including bilateral axillo-breast approach (BABA) has not been well studied. In this study, we have developed a self-reporting application (SRA) for iPad and prospectively collected pain scores from open thyroidectomy (OT) and BABA robotic thyroidectomy (RT) patients. Methods: Female patients who underwent total thyroidectomy for papillary thyroid carcinoma were included. Patients recorded pain scores for throat, anterior neck, posterior neck, chest, and back on postoperative days 1, 2, and 3. Once discharged, on postoperative day 14, a survey was also conducted on satisfaction of SRA and cosmesis. Results: A total of 54 patients were enrolled (27 BABA RT and 27 OT). There were no significant differences between the 2 groups in clinicopathological characteristics and postoperative complication rates. Postoperative pain scores at days 1, 2, 3, and 14 were not significantly different between the groups for throat, anterior neck, posterior neck, or back. Postoperative analgesic requirements were similar between the 2 groups. Wound satisfaction scores were significantly higher in the BABA RT group (BABA RT 7.4 vs. OT 5.7; P = 0.016). Satisfaction scores for the usefulness of SRA were above 7.2 for all four questionnaire items on the 10-point scale. Conclusion: Postoperative pain for BABA RT is equivalent to OT but offers greater cosmetic satisfaction for patients. A mobile device application such as SRA may facilitate proper assessment and management of pain in postoperative patients.

Thyroid Ultrasound Image Analysis with The Artificial Intelligence; Surgeon’s Perspectives

Young Jun Chai 대한외과학회 2021 대한외과학회 학술대회 초록집 Vol.2021 No.11

Young Follicular Thyroid Cancer Patients Have A High Risk of Incident Breast Cancer: An Analysis of The SEER Database

Su-jin Kim,Jun Pyo Myong,Sun Wook Cho,JungHak Kwak,Jong-hyuk Ahn,Hyeong Won Yu,Young Jun Chai,June Young Choi,Kyu Eun Lee,Ki-Tae Hwang 대한외과학회 2020 대한외과학회 학술대회 초록집 Vol.2020 No.11