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하성도(Ha Seong-Do),송달호(Song Dahl-Ho) 한국철도학회 1999 한국철도학회 학술발표대회논문집 Vol.- No.-
Development of the personal rapid transit system is reviewed from its invention stage to its current development stage in the world. Also, the special features of each PRT system and the reasons of delay of PRT application in cities are described briefly.
고속으로 주행하는 열차 주위의 3차원 비정상 유동장 해석
하성도,Ha, Seong-Do 한국기계연구원 1997 硏究論文集 Vol.27 No.-
The 3-dimensional unsteady compressible flows around the high speed train have been simulated for the train entering a tunnel and for passing another train. The simulation method employs the implicit approximation-factorization finite difference algorithm for the inviscid Euler equations in general curvilinear coordinates. A moving grid scheme is applied in order to resolve the train movement relative to the tunnel and the other train. The velo-city and pressure fields and pressure drag are calculated to study the effects of tunnel and the other train. The side directional force which is time dependent is also computed for the passing train. Pressure distribution shows that the compression wave is generated in front of the train noise just after the tunnel entrance and proceeds along the inside of tunnel.
하성도,김유일,Ha, Seong-Do,Kim, Yu-Il 한국기계연구원 1995 硏究論文集 Vol.25 No.-
At the running speed higher than 250 km/h, several aerodynamic problems such as the increase of aerodynamic resistance, aerodynamic noise, pressure fluctuation at the tunnel entry, impulsive wave at the tunnel exit bring about the power consumption, deterioration of riding quality, and severe environmental noise. To solve these aerodynamic problems, the flow phenomena around the high speed train have to be analyzed in detail. In this study, the flow around the train is modelled as the 2-dimensional viscous compressible flow and the flow field is calculated numerically for the three different types of geometry and running speed. The aerodynamic drag coefficient and the pressure coefficient are evaluated each case.
방과 후 축구교실 참여 학생의 과제목표성향과 우리성 및 친사회적 행동의 관계
이성철(Seong-Cheol Lee),하성일(Sung-Il Ha) 한국엔터테인먼트산업학회 2013 한국엔터테인먼트산업학회논문지 Vol.7 No.3
이 연구는 방과 후 축구교실 참여 학생의 과제목표성향과 우리성 및 친사회적 행동의 관계를 규명하기 위하여 수도권에 소재한 학교 및 축구클럽에서 방과 후 축구교실에 참여하는 초등학생 및 중학생을 모집단으로 설정하였다. 유층집락 표집방법을 이용하여 4개 지역으로 나누어 각각 100명씩 총 400명의 표본을 수집하였으며 분석에 이용된 최종 표본 수는 269명이다. SPSS를 이용한 중다회귀분석 및 경로분석을 통하여 얻은 결론은 다음과 같다. 첫째, 과제목표성향은 우리성에 영향을 미친다. 둘째, 과제목표성향은 친사회적 행동에 영향을 미친다. 셋째, 우리성은 친사회적 행동에 영향을 미친다. 넷째, 과제목표성향은 우리성을 매개로 하여 친사회적 행동과 인과적 관계를 형성한다. The purpose of this study was to examine relationship between the task goal orientation and We-ness, pro-social behaviors among Korean students to participate in After-School Soccer Program. In order to accomplish this study"s purpose, this study surveyed 400 subjects who are elementary school and middle school students to participate in After-School Soccer Program. in metropolitan area. Questionnaire was filled out by self-administered method and data, valid 269 subjects, was analyzed by SPSS program. Statistics used in this study were descriptive analysis, analysis of variance, correlation, regressions, and path analysis. The followings are the results of this study: First, task goal orientation of students to participate in After-School Soccer Program affects We-ness. Second, task goal orientation of students to participate in After-School Soccer Program affects and pro-social behaviors. Third, We-ness affects pro-social behaviors. Fourth, the relationship between the task goal orientation of students to participate in After-School Soccer and We-ness, We-ness and pro-social behaviors were revealed.
허신,하성도,Heo, Sin,Ha, Seong-Do 한국기계연구원 1997 硏究論文集 Vol.27 No.-
The dynamic design process for the articulated bogie of light rail vehicle(LRV) was studied to design a primary and secondary suspension elements. Suspension stiffness and damping is selected on the basis of the ride quality and suspension stroke trade-off. LRV was modeled as a 2 d.o.f linear system for the design of vertical suspension characteristics and a 4 d.o.f linear system for the design of lateral suspension characteristics. FRA's class-4-track irregularity was used for the exciting disturbance on track. The optimum value of primary and secondary suspension characteristics was determined using this design process.
증례 : 신장; 말기신부전 환자에서 Candida famata에 의해 발생한 심내막염
김정관 ( Jeong Gwan Kim ),황현철 ( Hyun Chul Whang ),장지연 ( Ji Yeon Jang ),하성은 ( Seong Eun Ha ),김동휘 ( Dong Hwi Kim ),최범순 ( Bum Soon Choi ) 대한내과학회 2014 대한내과학회지 Vol.86 No.3
Infective endocarditis is rare in end-stage renal disease (ESRD) patients, who have a poorer prognosis than the general population. Candida endocarditis is rare and has a poor prognosis among causes of infective endocarditis. A 45-year-old male was admitted with sepsis combined with a hematoma on his right back. Candida famata was cultured in his blood. We treated him with antifungal agents. Echocardiography was performed to identify vegetations and diagnose endocarditis. In this case, surgical therapy was impossible because the patient`s condition had deteriorated. We also administered antibiotics because methicillin-resistant Staphylococcus aureus was cultured from his sputum and a perianal abscess. The symptoms did not improve despite the ongoing treatment. Metabolic acidosis, hypotension, and a decreased state of consciousness developed and he died. We report a rare case of Candida endocarditis in an ESRD patient on hemodialysis.