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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.
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.