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통계적 분석 방법을 이용한 국가지하수수질측정망의 오염 등급 정량화 및 평가
윤희성,배광옥,이강근,Yoon, Hee-Sung,Bae, Gwang-Ok,Lee, Kang-Kun 한국지하수토양환경학회 2012 지하수토양환경 Vol.17 No.1
This study suggests a method to grade groundwater quality quantitatively using statistical approaches for evaluating the quality of groundwater in wells included in the Groundwater Quality Monitoring Network (GQMN). The proposed analysis method is applied to GQMN data from 2001 to 2008 for nitrate nitrogen, chloride, trichloroethylene, potential of hydrogen (pH), and electrical conductivity. The analysis results are obtained as groundwater quality grades of the groundwater representing each of the monitoring stations. The degree of groundwater contamination is analysed for water quality parameters, district, and usage. The results show that the degree of groundwater contamination is relatively high by nitrate nitrogen, bacteria and electrical conductivity and at Seoul, Incheon, Gwangju, Gyeonggido and Jeollado. The degree of contamination by nitrate nitrogen and trichloroethylene is especially high when the groundwater is used for agricultural and industrial water, respectively. It is evaluated that potable groudnwater in GQMN is significantly vulnerable to nitrate nitrogen and bacteria contamination.
A Service System Design to Support Medical Tourism in South Korea
윤희성,조성욱,비쟈얀 수구마란,Yoon, Hee Sung,Cho, Sung Woock,Sugumaran, Vijayan 한국경영정보학회 2013 Information systems review Vol.15 No.2
인간의 수명연장에 따라 의료비는 꾸준히 상승하고 있고 이에 따라 의료관광시장도 급 성정하고 있다. 한국은 우수한 의료진과 의료인프라를 기반으로 하여 세계의료관광시장에서 두각을 나타내고 있으며 정부에서도 전략성장산업으로 육성, 지원하고 있다. 의료관광산업의 성패는 '의료정보'와 '관광정보'의 접근용이성에 크게 영향을 받을 수밖에 없다. 건강보험공단 등이 많은 의료관련정보를 보유하고 있고 관광관련기관에서도 많은 관광관련정보를 보유하고 있지만 이들 정보가 의료관광객에게 효과적으로 제공되지는 못하고 있는 실정이다. 여기서는 의료관광에 있어 환자와 정보가 의료분야와 관광 분야에서 전달되는지 에 대한 명확한 도표와 서비스 수요자와 공급자의 필요에 대한 것들을 설명하고 있다. 본 논문에서는 의료관광의 소비자와 공급자간에 원활한 정보소통과 효과적 서비스전달을 위한 의료관광 서비스시스템 디자인을 제안하고자 한다. Healthcare costs are continuously increasing due to longer life expectancy and providing global healthcare services through medical tourism is new service growth engine for Korea. Several countries have well established programs and infrastructure dedicated to medical tourism. South Korea is attempting to become a major player in this domain by undertaking broad initiatives. The success of medical tourism is greatly impacted by easy access to two types of information, namely, medical and travel information. The National Health Insurance System in Korea collects huge amount of clinical and financial information from all hospitals. However, this information does not get used effectively in health and travel information systems to support medical tourism. This paper provide clear process map of medical tourism to understand how the patient and information process both medical and tourism fields also describe the need of customer and service provider. In this paper, we develop a medical tourism service system that will promote information exchange and service delivery.
백서(白鼠)에 유도된 알러지성 피부염에 대한 초감탕(椒甘湯)의 효과
윤희성,박외숙,김희정,김규석,김윤범,Yoon, Hui-Sung,Park, Owe-Suk,Kim, Hee-Jeong,Kim, Keoo-Seok,Kim, Yoon-Bum 대한한방안이비인후피부과학회 2005 한방안이비인후피부과학회지 Vol.18 No.3
Background and Objectives: Allergic contact dermatitis is a common environmental health issue and seriously affect the patient's quality of life. The more our environment industrialized, the number of material that could cause the allergic contact dermatitis has been increased, consequently the prevalence of allergic contact dermatitis has been increased. In oriental medicine, clinically Chogam-Tang has been used fur the treatment of allergic dermatitis, eczema, atopic dermatitis etc. The objective of this study is to investigate the effects of Chogam-Tang on allergic contact dermatitis Meterial and Methods: Fifteen Sprague-Dawley rats were divided into three groups: normal, control, experimental group. Control and experimental group were induced allergic contact dermatitis, by DNCB. Experimental group was orally administered the Chogam-Tang. Each group was observed after 24, 48 and 72 hours. Contact hypersensitivity assay, melanin-erythema measurement, pH measurement skin moisture measurement and biopsy were performed. Results: 1. In contact hypersensitivity assay, experimental group showed decreased ear swelling compared with control group at 48hours. 2. ln melanin measurement there was no difference in three groups. 3. In erythema measurement experimental group showed reduction at 48. 72 hours. 4. In pH measurement, experimental group and control group showed increase in pH but there was no statistical significance. 5. In skin moisture measurement, experimental group showed higher skin moisture level than control group at 24 hours and showed lower skin moisture level at 72 hours, but there was no statistical significance. 6. In biopsy, experimental group showed decrement of Iymphocyte as time goes by, and regeneration of keratin layer was increased compared with normal group. Conclusions: Chogam-Tang shows anti-inflammatory effect in biopsy, improves hydration levels of skin, decreases erythema level on allergic contact dermatitis.
윤희성(Hee-Sung Yoon),오율권(Yool-Kwon Oh) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
This study was numerically investigated on thermal deformation of AC4C and AC7A aluminum alloy casting material for manufacturing the automobile tire mold. The AC4C and AC7A casting material which used one of the aluminum alloy was selected as a casting material and the metal casting device was used in order to manufacture the mold product of automobile tire in the actual industrial field. The temperature distribution and the cooling time of these materials were numerically calculated by finite element analysis(FEA). Also, thermal deformation such as displacement and stress distribution was calculated form the temperature distribution results. The thermal deformation was closely related to the temperature difference between the surface and inside of the casting. The numerical analysis result occurred that the thermal deformation of AC7A casting material was higher than AC4C casting material. In addition, the results of displacement and stress distributions appeared to be larger at the center parts of casting than on its sides because of the shrinkage caused by the cooling speed difference.
반응표면법을 이용한 최소동작시간을 갖는 DC 솔레노이드 밸브의 형상 최적 설계
尹熙盛(Hee Sung Yoon),黃仁聖(In Sung Hwang),金東洙(Dong Soo Kim),尹蘇南(So Nam Yun),高彰燮(Chang Seop Koh) 대한전기학회 2006 전기학회논문지 B Vol.55 No.9
In general, a DC solenoid valve is evaluated by the performances such as the attraction force at maximum and minimum strokes, temperature rising, power consumption and time of action. The importance of each performance may be different according to the specific application purpose. When the temperature rising and power consumption are fixed, however, the performance of DC solenoid valve is usually evaluated by the attraction force at maximum and minimum strokes and time of action. In this paper, the shape of the pole face of plunger and core is optimized to increase the attraction force at maximum stroke, and thereby to minimize the time of action. For the shape optimization, (1+1) evolution strategy is incorporated with the response surface method(RSM) and finite element method(FEM).
(B, θ<SUB>B</SUB>)법을 이용한 이방성 전기강판의 자계 분포 해석
윤희성(Hee Sung Yoon),Li Wei,고창섭(Chang Seop Koh) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.4
일반적으로 이방성 전기강판의 자계 해석시, 자속밀도와 자계세기의 위상차를 고려하지 않고 그 크기만을 이용하여 자계 분포를 해석한다. 자속밀도와 자계세기는 그 방향이 같지 않기 때문에 유한요소 해석 시, 반드시 그 위상차가 고려되어야 한다. 본 논문에서는 (B, θ<SUB>B</SUB>)법을 이용하여 2차원 자기 특성이 고려된 이방성 전기강판의 자계 분포를 해석하고, 그 결과를 일반적인 유한요소 해석 결과와 비교한다.
윤희성(Yoon Hee-Sung),김선주(Kim, Sun-Ju),김행종(Kim, Haeng-Jong) 한국주거환경학회 2018 주거환경(한국주거환경학회논문집) Vol.16 No.1
Since the IMF, the problem of homelessness has emerged as a serious social problem. There have been many research and policy attempts in the past to cope with this. Many improvements and progress have been made in terms of policies and beneficiaries. This study is based on the necessity of the change of perspective in the situation where the homeless problem still can not be solved. Many developed countries are making efforts to adopt the homeless policy as a governance member of the government and the private network, or even the homeless, in terms of governance. There is no systematic analysis in Korea. As a result of analyzing outreach activities and happiness house projects, two of the most important projects of Korean homelessness and governance, strong network governance has been formally established but internal governance has not yet been achieved Outreach activities), and some strong network governance patterns, but a combination of weak network governance elements (happiness house business) appeared. The research significance of this paper is to provide new perspectives and criteria to evaluate the homeless policy in a governance manner. And this study has realistic and policy implications to diagnose problems and to suggest improvement directions to develop existing homeless governance into strong network governance.