강변저류지 횡월류부의 흐름 형태 변화를 고려한 HEC-RAS의 하도 내 부정류 모의 정확도 분석

김상혁,윤병만,김동수,김서준,Kim, Sanghyuk,Yoon, Byungman,Kim, Dongsu,Kim, Seojun 한국수자원학회 2016 한국수자원학회논문집 Vol.49 No.1

강변저류지를 홍수방어대책에 포함시키기 위해서는 정확한 홍수조절효과 산정이 필요하며, 이를 위해 현재 실무에서는 1차원 부정류 수치모형인 HEC-RAS를 사용하고 있다. 그러나 강변저류지의 저류용량이 부족한 경우에 발생하는 잠긴 횡월류 흐름에 대해서는 HEC-RAS 부정류 수치모의의 정확도 분석이 수행되지 않았다. 따라서 본 연구에서는 직선수로에 강변저류지를 설치한 경우에 대하여 횡월류부의 다양한 흐름 형태를 재현할 수 있는 부정류 수리실험을 수행하였다. 또한 부정류 수리실험 결과를 이용하여 HEC-RAS 모형의 부정류 수치모의 결과의 정확도를 분석하여 하도 내 수위 오차 및 강변저류지의 홍수조절효과 산정 오차를 제시하였다. 분석 결과 횡월류부에서 잠긴 횡월류 흐름이 발생하는 경우에 대한 HEC-RAS의 수위 계산 결과는 최대 -5% 오차를 보였으며, 홍수조절효과 오차는 최대 2.4%로 나타나 HEC-RAS의 부정류 모의 결과가 비교적 정확한 것을 확인하였다. Accurate quantitative assessment of flood control effect of side-weir detention basin as a flood countermeasure was highly required, in which one-dimensional HEC-RAS model has been widely utilized in practice. When the submerged overflow occurred particularly driven by limited storage capacity of a given detention basin, HEC-RAS model could not be sufficiently applicable by guaranteeing acceptable accuracy without reliable benchmark dataset. From this perspective, a dedicated unsteady experiment was planned and carried out to physically realize such submerged overflow for accommodating better accuracy. Subsequently, the experimental results were applied to validate and calibrate HEC-RAS unsteady modeling to provide flood control effect of the detention basin for various inflow scenarios. After following this procedure, the modelled results indicated that there appeared within -5% of difference in stage height and maximum 2.4% accuracy to assess the flood control effect, thereby ensuring the calibrated HEC-RAS unsteady model to be accurate with practically acceptable error range.

중의체질의학과 치미병(治未病)센터에 대한 보고

김상혁,주종천,황동욱,이시우,Kim, Sang-Hyuk,Joo, Jong-Cheon,Hwang, Dong-Uk,Lee, Si-Woo 사상체질의학회 2010 사상체질의학회지 Vol.22 No.3

1. Objectives: The objectives of this paper are to report Traditional Chinese Medicine (TCM) Constitution Theory and the present state of Chinese Health Administration Center. 2. Methods: We visited China for "China Technology Survey" in 2009. Our purposes were to research for the study of constitutional medicine in China and to search for the Development Plan of Constitutional Medicine Through the Research of Chinese Constitutional Medicine. This paper is the report of the "China Technology Survey". 3. Results & Conclusions: In China, the concept and diagnosis of TCM constitutions is nine(Balanced Constitution, Qi-deficient Constitution, Yang-deficient Constitution, Yin-deficient Constitution, Phlegm-dampness Constitution, Damp-heat Constitution, Stagnant blood Constitution, Stagnant qi Constitution, Inherited specific Constitution). And Chinese government established the Classification and Diagnosis Standards for the Constitutions of TCM in 2009. TCM Constitution Theory is being widely applied at Health Administration Center that treats 'predisease' patients. Theses Chinese clinical implications of constitutional medicine are a good example for "Sasang Constituional Medicine" Care Service.

체질진단설문지 정확률 연구의 연구방법론 고찰

김상혁,장은수,고병희,Kim, Sang-Hyuk,Jang, Eun-Su,Koh, Byung-Hee 사상체질의학회 2012 사상체질의학회지 Vol.24 No.3

Objectives For the methodological review on the accuracy study of questionnaire for Sasang constitution diagnosis, we searched the various diagnostic accuracy study of the questionnaires for Sasang constitution. Methods We searched MEDLINE, the Cochrane Library, KISS, and DBPIA. Additionally, We hand-searched the main oriental medical journals. All articles were independently reviewed and selected by two evaluators. And selected articles were assessed by "Quality Assessment of Diagnostic Accuracy Studies Tool"(QUADAS Tool) for the methodological review. Results The twenty eight studies initially identified studies were included in the methodological review. The part of "Acceptable reference standard", "Uninterpretable results reported" and "Withdrawals explained" was very weak in the risk of bias. The part of "Representative spectrum", "Acceptable delay between tests", "Incorporation avoided", "Reference standard results blinded", "Index test results blinded" was unclear in the description. Conclusions For the further study on the accuracy study of Sasang constitution diagnosis, we have to improve the aforementioned errors. Additionally, the checklist for the description of study might be needed.

소양인(少陽人) 비수한표한병론(脾受寒表寒病論) 중(中) 섬어괴병에 관(關)한 고찰(考察)

김상혁,김윤희,장현수,이준희,고병희,Kim, Sang-Hyuk,Kim, Yun-Hee,Jang, Hyun-Su,Lee, Jun-Hee,Koh, Byung-Hee 사상체질의학회 2008 사상체질의학회지 Vol.20 No.3

1. Objectives This study aims to establish the concept and classification of the Delirious Speaking Bad Disease in the Soyain's Exterior Cold Disease induced from the Spleen Affected by Cold. 2. Methods Different editions of "Donguisusebowon", including the Gabo version and the Sinchuk version, were compared for differences and similarities in the Soyangin disease. And we discussed other studies done previously. 3. Results and conclusions Soyangin's Delirious Speaking Bad Disease can be understood as shifted symptom of all of Soyangin's Exterior cold disease induced from the spleen affected by cold.

조선시대 간의대의 배치와 척도에 대한 추정

김상혁,민병희,안영숙,이용삼,Kim, Sang-Hyuk,Mihn, Byeong-Hee,Ahn, Young-Sook,Lee, Yong-Sam 한국천문학회 2011 天文學論叢 Vol.26 No.3

Since the thirteenth century, large scale facilities and various instruments for astronomical observation were built and installed in East Asia. During the Yuan Dynasty, S. ti.ntai (Beijing astronomical observatory in the Yuan Dynasty, 司天臺) was built in Beijing in 1279. Various astronomical instruments, including Ganui (Jianyi, simplified armillary sphere, 簡儀), Yang-yi (upward hemisphere, 仰儀) and Gyupyo (gnomon, 圭表) were installed in this observatory. These astronomical instruments were modified and improved by researchers of the Joseon Dynasty. Ganuidae (Joseon astronomical observatory, 簡儀臺) was built in Gyeongbokgung (or Gyeongbok palace, 景福宮), Seoul. Its scale was 31 Cheok (Korean feet in the Joseon Dynasty, 尺) in height, 47 Cheok in length and 32 Cheok in width. Lee, Cheon (李?, 1376~1451), a responsible leader of Ganuidae project, set up various astronomical instruments with his colleagues. Ganui and Jeongbangan (direction-determining board, 正方案) were installed at the top of this observatory. Gyupyo was installed at the west side of this observatory and Honui (armillary sphere, 渾儀) and Honsang (celestial globe, 渾象) were installed in a small pavilion which was located next to Gyupyo. A decade after installation, this observatory was moved to the north-west side of the palace but almost destroyed during Japanese invasion of Korea in 1592 except Ganuidae. We have analyzed documents about Ganuidae and investigated Chinese remains of astronomical observatories and artifacts of astronomical instruments. In this paper, we suggest the appearance, structure, arrangement and scale of Ganuidae, which are expected to be used for the restoration of Ganuidae at some day in the near future.

홍대용 혼상의(渾象儀)의 복원 연구: 구조와 작동 메커니즘을 중심으로

김상혁,이용삼,박제훈,Kim, Sang-Hyeok,Lee, Yong-Sam,Park, Je-Hun 한국천문학회 2012 天文學會報 Vol.37 No.2

홍대용(洪大容, 1731~1783)이 저술한 "담헌서(湛軒書)" 외집 권6의 <주해수용(籌解需用)>에는 수격식 천문시계인 혼상의(渾象儀)에 대한 기록이 나온다. 우리는 홍대용 혼상의에 대한 구조와 작동 메커니즘에 대한 연구를 통해 복원 모델의 개념설계를 진행하였다. 혼상의는 세 개의 환(環)과 2개의 층(層)으로 되어 있다. 외층에 해당하는 환 구조는 자신이 제작한 혼천의인 통천의(統天儀) 구조와 유사하다. 내층에 해당되는 혼상구에는 별자리와 은하수를 그려넣고, 태양과 달의 모습을 구슬 형태로 매달아 천상의 운행 모습을 구현하였다. 통천의는 추동력으로 운행되며, 혼상의는 물에 의한 수격방식으로 운행된다. 홍대용의 수격방식은 조선에서 전통적으로 사용한 동력체계로 중국의 대표적 천문시계인 수운의상대의 동력체계를 간소화시켰다. 혼상의에 대한 기록은 조선시대 수격식 동력체계를 다룬 거의 유일한 문헌기록으로 수격식 작동 메커니즘 연구에 중요한 단서를 제공해 주고 있다.

조선 천체위치측정기기의 구조 혁신 - 소간의, 일성정시의, 적도경위의를 중심으로 -

김상혁,민병희,이민수,이용삼,Kim, Sang-Hyuk,Mihn, Byeong-Hee,Lee, Min-Soo,Lee, Yong-Sam 한국천문학회 2012 天文學論叢 Vol.27 No.3

The Ganui (簡儀, simplified armillary sphere) is a representative of astronomical instruments in Joseon Dynasty of Korea, as well as Yuan Dynasty and Ming Dynasty of China. In early 15th century, Joseon's scientists and engineers uniquely developed the Soganui (小簡儀, small simplified armillary sphere) and the Ilseongjeongsiui (日星定時儀, sun-and-star time determining instrument) from the structural characteristic of Ganui. These two astronomical instruments had a new design by the miniaturization and felt convinced a similar performance of Ganui in the harmony with Korean Astronomy and Astrology Cultures. Since mid-18th century after the enforcement of shixian-li (時憲曆), the Soganui and Ilseongjeongsiui handed over the Jeokdogyeongwiui (赤道經緯儀, equatorial armilla) by a change of the observational framework such as the time and angle measures. The Jeokdogyeongwiui made by Gwansanggam (觀象監, Bureau of Astronomy in Joseon Dynasty) adopted the new observational framework. We studied the structural characteristics and scientific values of these 3 astronomical instruments with theirs observation methods.

악심(惡心) 구토(嘔吐)를 주소(主訴)로 하는 태음인(太陰人) 소뇌경색(小腦硬塞) 환자(患者) 치험(治驗) 1례(一例)

김상혁,석재화,이갑수,최경주,함통일,황민우,이의주,송일병,고병희,Kim, Sang-Hyuk,Seok, Jae-Hwa,Lee, Kab-Soo,Choi, Kyung-Ju,Ham, Tong-Il,Hwang, Min-Woo,Lee, Eui-Ju,Song, Il-Byung,Koh, Byung-Hee 사상체질의학회 2006 사상체질의학회지 Vol.18 No.2

1. Objectives This case is to report that a Taeumin patient with nausea and vomiting treated by Taeumin's Contitutional medications. 2. Methods This patient was treated by several Constitutional medications and acupuncture treatment according to the result of Sasang Constitutional diagnosis with western management. We used Visual analogue scale(VAS) for the assessment of nausea and vomiting. 3. Results and Conclusions This patient's chief complaints were nausea and vomiting. So She was treated by Taeumin's Constitutional medications(especially Galgeunhaegui-tang, Cheongsimyeonja-tang) and showed a positive response about her symptom. Bur then we consider that studies about that case like this are mote needed.

경두개직류자극 전기장의 분포 특성에 비등방성 전기 전도율이 미치는 영향 분석 :3차원 고해상도 유한요소 두뇌 모델을 통한 연구

김상혁,서현상,조영선,이원희,김태성,Kim, Sang-Hyuk,Suh, Hyun-Sang,Cho, Young-Sun,Lee, Won-Hee,Kim, Tae-Seong 대한의용생체공학회 2011 의공학회지 Vol.32 No.4

For effective stimulation with tDCS, spatial focality of induced electrical field(EF) and current density(CD) is one of the important factors to be considered. Recently, there have been some studies to improve the spatial focality via different types of electrodes and their new configurations: some improvements using ring electrodes were reported over the conventional pad electrodes. However, most of these studies assumed isotropic conductivities in the head. In this work, we have investigated the effect of tissue anisotropy on the spatial focality of tDCS with the 4 + 1 ring electrode configuration via a 3-D high-resolution finite element(FE) head model with anisotropic conductivities in the skull and white matter. By examining the profiles of the induced EF from the head models with isotropic and anisotropic conductivities respectively, we found that the spatial focality of the induced EF significantly drops and get diffused due to tissue anisotropy. Our analysis suggests that it is critical to incorporate tissue anisotropy in the effective stimulation of the brain via tDCS.

체질별 성격요인이 수면에 미치는 영향

김상혁,박기현,정경식,Kim, Sang-Hyuk,Park, Ki-Hyun,Jeong, Kyoungsik 사상체질의학회 2021 사상체질의학회지 Vol.33 No.3

Objectives The purpose of this study was to identify the effects of personality by each Sasang constitution on sleep using Positive Affect and Negative Affect Schedule(PANAS) and NEO-personality inventory(NEO-PI). Methods The subjects of this study were 2,078 people who had information on Sasang constitutional type and personality(PANAS, NEO-PI) among the data established at the Korean Medicine Data Center. Sleep time and sleep quality were investigated through self-written questionnaires. Sleep time was collected by hand-writing, and sleep quality was checked on a 4 point Likert scale. Pearson correlation analysis was conducted to see the correlation between personality and sleep in each constitutional type. Logistic regression was performed using personality as independent variables to find out how much personality affects sleep time. In order to find out how much personality affects sleep quality, regression analysis was performed using personality as independent variables. Results & Conclusions Sleep time was hardly affected by personality. As a result of Pearson correlation analysis, sleep time in all subjects did not show a significant correlation with personality. In logistic regression on sleep time as the dependent variable, no statistically significant results were obtained except for the Negative Affect(NA) in Taeeumin. Sleep quality showed a statistically significant correlation with the negative affect(NA), neuroticism(N), extraversion(E), Physical Component Summary(PCS) and Mental Component Summary(MCS). As a result of regression analysis on sleep quality as the dependent variable, neuroticism(N), negative affect(NA), positive affect(PA), and extraversion(E) were found in the factors affecting sleep quality. Besides, how much personality affected sleep quality might differ in each constitution. In all constitutions, sleep quality was affected by N, but the rank of N was different in each constitution. The sleep quality of Soyangin was not affected by E, and the sleep quality of Taeeumin was specifically affected by O.