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2차원 수중익의 비정상 공동 유동 및 유기 소음 특성 규명을 위한 수치해석
허남욱,김지혜 한국전산유체공학회 2024 한국전산유체공학회지 Vol.29 No.1
Due to the adverse impact of induced noise generated from ships on the marine ecosystem, there has been a gradual strengthening of international environmental regulations aimed at suppressing it. Specially, cavitation occurring in marine propellers is a major source of ship noise, making it necessary to understand the development and noise characteristics of cavitation of it. In this study, we are focusing our attention on investigating the occurrence and noise characteristics of cavitation around 2D hydrofoils using commercial program, STAR-CCM+. Additionally, the noise characteristics of cavitation are examined by conducting frequency analysis of fluctuating pressure at a vertical position above the hydrofoil and the numerical results are validated by comparison with existing experimental data.
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허남욱 한국한문교육학회 2000 한문교육논집 Vol.15 No.-
Under the confucian ideas it is necessary to literature to take an interest in realistic matters as political and social ones. For the character of the Confucianism like this the pragmatism was settled down as the most influential view of literature traditionally. So in the traditional society of confucianism the educational part of literature was emphasized and they thought education could be realized effectively by literature. But the viewpoint of the social parts of literature and the evaluations of it had two different positions. One is 'educating the common by the upper class' which places more weight on the position of the ruler. And the other is 'satirizing the upper class by the common' which places more weight on the position on the nation. The position of 'educating the common by the upper class' understands literature as followings ; Rulers educate and guide properly the common, that is, literature is understood in the ethical meaning and parts of the upper class is emphasized. In this case 'no vice in thought', 'good nature', 'mild disposition' and 'educating the common Heung Gwan', etc. are the core themes of literature and measures of evaluation. The tradition like this is appeared on bureaucratic literati in the time of the pre-Chosun dynasty after importing the Zhu Xi school of Neo-Confucianism and it is continued to bureaucratic literati in the time of the post-Chosun dynasty. The main interests of literature in the position of 'satirizing the upper class by the common' are inclined towards 'ruling the nation in political and social disorder' and 'virtue and vice' directly and indirectly. And the part of the common is more important. In this case matter of historical reality is the serious issue. The part of 'speaking plainly to the upper class with writings' is appeared often among critical intellectuals in the time of post-Gorye dynasty and the time of pre-Chosun dynasty and the realists in the time of post-Chosun dynasty dealt with it focusly. And the public, who is called 'Jung-in, left the poems which tells satire and plain speaking under the influence of the realists.
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許南郁 江原大學校 江原文化硏究所 2002 강원문화연구 Vol.21 No.-
The main point of this research is various idea of literature, literary ideas of 時弊匡救 and independent literacy were on the rise at the late Chosun. During the pre-Chosun period. Neo-Confucianism (the Zhu Xi) was prevalent. but by the end of Chosun dynasty
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환자조사자료를 이용한 우리나라 고혈압 환자의 19년간(1990 2008)의 의료이용 양상 및 관련 요인분석
허남욱,김현창 대한고혈압학회 2014 Clinical Hypertension Vol.20 No.1
Background: To analyze the patterns of medical care utilization and its related factors in hypertensive patients during 19years (1990 2008), utilizing national patient survey in Korea. Methods: Using seven surveyed data, age-standardizedmedical care utilization increasing ratios for the inpatients and outpatients compared to the year of 1990 were calculated,respectively. Changes of medical facilities (%) of patients used in 1990, 1999, and 2008 were compared. For the outpatients,median length of stay and discharge mortality rate per 1,000 persons were calculated. Multivariate logistic regressionmethods were used to identify related factors of the resident patients and the comparison characteristics betweenhypertensives and the others of all subjects. Sample weights were used. Results: The medical care utilization ofhypertensives were increased for both inpatients and outpatients. However, the ratios were dramatically diminished after thestandardization. Age-standardized ratios were 3.6 in outpatients and 5.9 in inpatients compared to 1990. For the outpatients,mainly used medical facilities were changed from general hospital to convalescent hospital. Also, median length of stay anddischarge mortality rate were increased up to 5 times and 4 times compared to 1990. The odds of being resident patientswere related with discharge as death and using oriental medical center convalescent hospital in 2008. Hypertensive patientswere older than the others. Confined to hypertensive patients, member of National Health Insurance was more tend to beoutpatients but less inpatients. Conclusions: Aging population and long-term care Act were presumed as the main reason forthe increasing of medical care utilization in 1990 to 2008. 연구배경: 고혈압은 우리나라 주요 만성질환의 하나로고혈압으로 인한 의료이용과 관련 질병부담이 지속적으로 증가하고 있다. 우리나라의 고령화 현상으로 인한 고혈압 환자 증가에 대비한 효과적인 의료자원 배분을 위하여 고혈압 환자에서의 의료이용 특성과 추세를 파악할 필요가 있다. 방법: 1990년부터 2008년까지 총 7회의 환자조사자료를 이용하였고 고혈압은 주진단코드가 ‘I10 I15’에 해당하는 경우로 정의하였다. 2005년 추계인구로 표준화하여연령별, 성별로 1990년 대비 외래와 입원의 이용자 수 증가비를 산출하였고 의료기관 종별 이용률을 3개년도에한해 비교하였다. 입원과 관련해 평균재원일 수, 1,000명당 사망퇴원율을 연도별로 산출하였고, 장기재원 관련 요인, 전체 의료이용자와 고혈압으로 인한 의료이용자의 특성 파악을 위해 로지스틱회귀분석을 시행하였다. 결과: 고혈압으로 인한 의료이용은 1990년 대비 지난19년간 지속적으로 증가하였으나 인구표준화 이후 약50%가량 증가폭이 감소하여 외래와 입원 각각의 의료이용 증가비는 인구표준화 후 3.6배와 5.9배였다. 의료기관별로는 종합병원 이용이 줄고 특히 입원 환자의 경우2005년 이후 요양기관 이용이 많다. 관련하여 사망퇴원환자의 평균재원일 수는 약 5배, 사망퇴원율은 약 4배 상승하였다. 한방의료기관을 이용하거나 사망퇴원일 때 장기재원환자에 속할 가능성이 높았고 2008년에는 요양병원 이용하는 경우의 관련성이 가장 높았다. 전체 외래이용 환자 중 고혈압 환자의 분율은 19년간 7.9%에서18.9%로 꾸준히 증가하였으나 입원 환자 중 고혈압 환자의 분율은 1%로 유지되었다. 결론: 외래와 입원의료이용 증가의 가장 큰 원인은 인구구조의 고령화에 의한 것이고 이용하는 의료기관의 변화와 평균재원일 수와 사망퇴원율의 증가는 노인장기요양보험 시행의 영향이 가장 큰 것으로 추정된다.
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