靈魂. 創造. 輪廻

黃山德(황산덕) 동국대학교 석림회 1982 석림 Vol.16 No.-

Application of magnetic field to iron contained dust capture

황산,박해우,조영민,박영구,김윤채 한국응용과학기술학회 2014 한국응용과학기술학회지 Vol.31 No.1

Indoor air quality including metro subway is of recent interests in large cities. Inflowair to the inside of the train and circulating air flow through MVAC of stations contain largeamount of iron based fine particles. This paper evaluated the collection of such a dust by magneticfilters as comparing to conventional particle capturing mechanisms such as inertia, direct impactionand diffusion. It was found that filtration velocity, magnetic field intensity, and fiber size were themost important parameters for magnetic filtration. Application of magnetic force obviously enhancesthe collection efficiency particularly in fine modes smaller than 10 mm. However, its effect wasfound greater in 2.5 mm than submicron particles.

홍일점 변호사의 어제 오늘 내일 - 여류법조인 황산성씨와의 대담록에서 -

황산성,이경무 한국사법행정학회 1979 사법행정 Vol.20 No.7

동남권 외국인주민의 분포 특성과 거주지 결정요인에 관한 연구

황산,김형근 한국주거환경학회 2023 주거환경(한국주거환경학회논문집) Vol.21 No.3

The number of foreign residents residing in Korea is continuously increasing, and the proportion of foreign residents living in non-metropolitan areas is increasing. This study examines the housing characteristics of foreign residents in Busan, Ulsan, and Gyeongsangnam-do and analyzed the effect on the number of foreign residents in the region. The results of regression analysis on the number of foreign residents in 2021 are as follows. Regarding regional characteristics, it was found that the resident population and the ratio of foreigners had a positive effect. The housing characteristics, jeonse price and apartment ratio, were found to have a negative effect. In addition, it was found that the number of manufacturing workers, foreign schools, and universities, which are industrial characteristics, had a positive effect on the number of foreign residents in the region. The population or the number of manufacturing workers showed similar results to the overall analysis, but there were results showing different influences depending on the type of foreign residents. For example, foreign schools were found to have a significant effect on foreign residents without Korean citizenship, and universities were found to have a significant effect on international students.

급성 전벽 심근경색증에서 하벽 유도에 ST절 상승에 따른 임상적 소견 및 관상동맥 조영술 소견에 관한 연구

황산,김성구 순천향의학연구소 2002 Journal of Soonchunhyang Medical Science Vol.8 No.2

Background : We investigated the clinical significance and coronary angiographic findings of inferior ST elevation during acute anterior myocardial infarction. Material and method : The subjects were comprised 70 patients diagnosed as acute anterior myocardial infarction. The subject were divided into two groups by inferior ST elevation(presence : group I=20, absence : group Ⅱ=50). We compared group Ⅰ with group Ⅱ by electrocardiographic ST changes of leads Ⅰ and aVL, peak serum CK-MB level, ventricular wall motion of echocardiographic findings, presence of warpped LAD, infarct-related lesion. Results : 1) The peak CK-MB level and the sum of ST elevation in lateral limb leads were smaller in group Ⅰ than group Ⅱ(p<0.05). 2) The inferior wall abnormality and wrapped left anterior descending artery were more common in group Ⅰ than group Ⅱ(p<0.0003). 3) Occlusion of proximal left anterior descending artery was rare in group Ⅰ than group Ⅱ(p<0.0004) Conclusion : Inferior ST elevation during anterior myocardial infarction appears lower peak CK-MB & summed ST elevation in lateral limb leads, more common wrapped LAD, smaller proximal LAD lesion than inferior ST depression.

반응/미반응 자료의 과대표본 추출에 대한 연구

황산하,진서훈,최종후 한국자료분석학회 2013 Journal of the Korean Data Analysis Society Vol.15 No.4

For binary classification problem, target ratio of data mart can affect model performance. When forming a data mart for model building, if certain categories of the target variable is relatively rare, it is desirable that good/bad ratio of target variable is balanced. This is called as oversampling. This study is experimental study for oversampling. Target ratio is changed from 1:1 to 1:20. We found optimal model under various target ratio. Especially, boosting and random forrest are compared with traditional classification method decision tree and logistic regression. Proper target ratio and cut-off value are found by cross-validation. Logistic regression model gave better result when target/non-target ratio is 1:20 and 1:16 under cut-off value 0.10. AdaBoost gave the best result for other target ratio cases. Under the cut-off value 0.20, AdaBoost gave better result for target/non-target ratio is balanced decision tree gave better result for unbalanced target/non-target ratio. Under the cut-off value 0.3 to 0.5, logistic regression and random forest gave better result while decision tree gave worse result. 반응/미반응과 같은 이분형(binary) 목표변수를 갖는 모집단에서 모형개발을 위한 데이터마트를 형성할 때 반응/미반응 구성비는 구축된 모형의 성능에 영향을 준다. 따라서 목표변수의 특정 범주가 상대적으로 희소한 경우 모형 구축을 위하여 데이터마트를 형성할 때, 목표변수 각 범주 빈도의 수적 형평성을 맞추는 것이 바람직하다. 이를 과대표본추출(oversampling)이라고 한다. 본 연구는 이에 대한 실험적 연구로 과대표본추출의 구성비를 1:1에서 1:20까지 다양하게 구성하여 분류기준값(cut-off) 별로 최적모형을 찾아보았다. 특히 앙상블 기법인 부스팅(boosting) 중 아다부스트(AdaBoost)와 랜덤포레스트(random forests) 기법을 의사결정나무 및 회귀모형과 함께 비교하였다. 또한 교차타당성(cross-validation)을 통한 검증을 통하여 과대표본추출의 적절한 분류기준값과 구성비를 찾아보았다. 분류기준값 0.10에서 구성비가 1:20, 1:16 등 불균형이 심할 때는 로지스틱회귀분석이 좋은 결과를 주었으며 그 외의 구성비에서는 아다부스트가 가장 좋은 결과를 주었다. 분류기준값 0.20에서는 구성비의 불균형이 적을 때는 아다부스트가 좋은 결과를 주었으며 구성비의 불균형이 클 때는 의사결정나무가 좋은 결과를 주었다. 분류기준값 0.3에서 0.5까지에서는 로지스틱회귀분석과 랜덤포레스트가 좋은 결과를 주고 있으며 의사결정나무는 상대적으로 좋지 않은 결과를 보였다.

나의 아버지

황산성 새가정사 1995 새가정 Vol.456 No.4

중 · 고등학교 필드하키선수의 성취목표성향에 따른 귀인인식

황산은(San-Eun Hwang) 인하대학교 스포츠과학연구소 2008 스포츠과학논문집 Vol.20 No.-

본 연구는 필드하키선수의 성취목표성향에도 차이가 날 수 있다는 것을 알아보고, 그에 따른 성공과 실패의 이유를 찾아내어 문제점들을 해결하고, 귀인의 특성을 규명하는데 그 목적이 있다. 총 53명의 중고등학교 필드하키 선수들을 대상으로 성취목표성향과 스포츠 상황의 귀인에 관한 자료를 수집하였다. 성취목표성향은 성별에 따라 차이가 나타났다. 여자는 타인에게 능력을 과시하기 보다는 문제해결을 하거나 자신이 목표한 수준에 노력에 대한 과제성향이 높았고, 남자는 자신이 소유한 높은 능력으로 결과가 일어났다고 결론짓는 자아성향이 높게 나타났다. 성공귀인에서 보면 남자의 경우 자신의 목표성향이 있으면서도 자신의 능력보다 노력요인에서 찾으려고 한다는 것을 알 수 있다. 여자의 경우는 자신의 목표성향이 성공이나 실패를 그대로 나타났다. 목표성향 집단별 성공귀인과 실패귀인에서 목표성향의 중앙값을 기준으로 선수들의 고집단과 저집단으로 구분하였는데, 성공귀인에 대한 자아성향이 높을수록 낮은 자아성향과 같은 노력요인에서 볼 수 있었고 능력보다는 노력이 중요시 하였다. 실패귀인에 대한 성향에는 과제성항이 낮을 때나 높을 때 노력에서 나타났다. 성공귀인에 대한 과제와 자아성향의 주효과는 노력요인에서 많이 보였으며, 선수들의 개인의 성격에 따라 달라질 수 있다는 것을 알 수 있었다. The purpose of this study was to examine the attribution characteristics according to field hockey player's achievement goal orientation A total of 53 players from middle school and high school field hockey teams (13 male, 11 female middle school players and 15 male, 14 female high school players) responded to the Korean version of the Task and Ego Orientation Questionnaire and sport attribution scale. The results of this study were as follows. First, achievement goal orientation was significantly diifferent across gender. Female group was higher at task-goal orientation about solution and effort rather than they paraded their ability to others; however male group was higher at ego-goal orientation Second, this study showed that male players tried to find effort rather than ability factor in spite of his goal orientation at success attribution and they regarded success factors as effort or fortune so this study proved that male group had task-goal and ego-goal orientation. Meanwhile female players, their goal orientation represented success or failure as it is. Third, player's orientation showed that effort factor was more important than ability in success and failure factor. Players thought that their success was the result of constant effort when they succeed.

나의 지방행정 경험담 ( 지방행정 1957 년 10 월호 , 제 6 권 제 10 호 )

황산덕 대한지방행정공제회 1957 地方行政 Vol.6 No.10

결과적 가중범(加重犯)

황산덕 한국사법행정학회 1963 사법행정 Vol.4 No.4