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지하역사 승강장 및 대합실 평상시/비상시 급ㆍ배기 환기 Large Eddy Simulation
장용준(Yong-Jun Jang),류지민(Ji-Min Ryu),박덕신(Duck-Shin Park) 한국전산유체공학회 2013 한국전산유체공학회지 Vol.18 No.3
The turbulent flow behavior of air supply and exhaustion in the Shin-gum-ho subway station is analyzed for ordinary and emergency state. The depth of Shin-gum-ho station is 43.6m which consists of the island-type platform(8th floor in underground) and a two-story lobby (first & second floor in underground). An emergency stairway connects between the platform and the lobby. Ventilation operation mode for ordinary state is set up as a combination of air supply and exhaustion in the lobby and platform, while for emergency state it is set up as a full air supply in the lobby and a full exhaustion in the platform. The entire station is covered for simulation. The ventilation diffusers are modeled as 95 square shapes of 0.6m?0.6m in the lobby and as 222 square shapes of 0.6m×0.6m and 4 rectangular shapes of 1.2m×0.8m in the platform. The total of 7.5million grids are generated and whole domain is divided to 22 blocks for MPI efficiency of calculation. Large eddy simulation(LES) is applied to solve the momentum equation and Smagorinsky model(C<SUB>s</SUB>=0.2) is used as SGS subgrid scale) model. The time-averaged velocity fields are compared to experimental data and show a good agreement with it.
이명경,최준열,김인경,조영아,김영신,정혜진,김리나,이영규,조영태,Lee, Myung-Kyung,Choi, Jun-Yeol,Kim, In-Kyoung,Cho, Yeong-Ah,Kim, Young-Shin,Jung, Hye-Jin,Kim, Li-Na,Lee, Young-Kyu,Cho, Young-Tae 대한예방의학회 2006 예방의학회지 Vol.39 No.4
Objectives: This study aims to examine if a garbage dumping site has real and negative influence on the quality of life (QOL) for the nearby residents. The net effects of the residential distance from the garbage dumping site and from the garbage truck route were investigated for five domains of the QOL. Methods: Two hundred fifty seven Shin-dong Myeon residents, Chun-cheon Si, participated in a self-administrated survey. The Shin-dong Myeon garbage dumping site began operating in 1996. ANCOV A with generalized linear models and multiple regression analysis were performed. Results: Descriptive analyses show that a residence nearby a garbage dumping site is negatively associated with the physical and environmental domains of the QOL. The residential distance from the garbage truck route does not exert any significant effect on various domains of QOL, except for the environmental domain. On the multivariate analysis, the residents living near the garbage dumping site tended to have a significantly negative QOL in the physical and environmental domains. However, the distance from the garbage truck route did not show a significant nor substantial effect on the QOL. The demographic and socioeconomic control variables are associated with a number of the QOL domains, and their patterns are consistent with the general expectations. Conclusions: The results indicated that a garbage dumping site is considered to be an environmental hazard among the nearby residents according to the lower scores on the physical and environmental domains of the QOL. The findings from this study provide comprehensive understanding on the residents' QOL, and they may help politicians and policy makers make decisions for appropriate interventions.
신규만,송준혁,김명현,최혜영 梨花女子大學校 醫科大學 醫科學硏究所 1996 EMJ (Ewha medical journal) Vol.19 No.4
Objectives : The timing of aneurysm surgery has been a topic of major neurosurgical controversy. Aneurysmal rebleeding is the most cataclysmic and disabling event following initial subarachnoid hemorrhage. Thus, early surgical obliteration of aneurysm eliminates the potential for rebleeding during the highest risk period. Method : The results of operation for the twenty-three patients who had admitted to neurosurgical departments, Mokdong hospital and undergone surgery within the 24-72 hours after initial rupture of these aneurysms from October, 1993 to August, 1996, were reviewed. Results : Twenty-three patients underwent craniotomy for clipping and intracranial clot evacuation, and postoperative hypertensive, hypervolemic, and hemodilution therapy. The outcome was excellent in 10(43%), good in 3(13%), poor in 5(22%) and death in 5(22%). The mean age was 57.7 and the ratio of male to female was 13:10. The outcome according to Hunt-Hess(H-H) grade was followings. H-H grade 1 was 2(%) and all excellent outcome, H-H grade 2 24(61%) and the outcome were excellent in 8(35%), good in 1(4%), poor in 2(9%), death in 3(13%), H-H grade 3 was 6(26%) and good in 2(9%), poor in 2(9%), death in 2(9%), and H-H grade 4 was 1(4%) and the outcome was poor in 1(4%). The outcome according to grading system of Fisher was followings. Grade 2 was 6(26%), and the outcome was excellent in 5(22%) and death in 1(4%). The grade 3 was 14(61%) and excellent in 5(22%), good in 2(9%), poor in 3(13%), and death in 1(4%). The grade 4 was 3(31%) and good in (4%) and poor in 2(9%). The variations in anterior communicating complex were followings. The both A_1 equal in 6(26%), left A_1 dominancy was 1(4%), right A_1 atresia was 13(57%) and left atresia was 3(13%). Conclusions : The most favorable outcomes and lowest mortality rate were patients of H-H grade 1 group. The surgical results of alert patients with early surgery should even further improve as compared to delay surgery. However, patients who present in poor medical condition at the time of operation were still indicated delay surgery.
유도형 변위 센서의 전기 노이즈 분석과 센서 성능에 미치는 영향 고찰
신우철,홍준희,이동주 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-
Noise is a problem in many electronic circuits and active control system. Arising from spuriously coupled noise from other circuits, it corrupts the signal of interest and introduces an uncertainty into information it contains. In this paper, we have researched noise characteristics of the inductive displacement sensor which has been designed. we first present basic concept and characteristics of magnetic field-coupled noise in the sensor output signal. Then, we are present relation noise and sensor performances. Finally, we concentrate low noise design of a sensor driver and a signal detection circuit.
신민섭,류명은,김붕년,황준원,조수철 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.1
Objectives : This study was conducted to develop the Korean version of the I0WA Conners rating scale (K-IOWA), and to examine its reliability and validity. Methods : The subjects were 41 normal children and 40 ADHD children between the ages of 5 and 12. All of the teachers administered the K-IOWA and the abbreviated Conners' rating scale to calculate the internal consistency coefficient of the K-I0WA and to examine its validity. Results : The reliability coefficient of the K-IOWA (Cronbach's α) was .913. The range of correlation coefficients between K-IOWA scores and the Abbreviated Conners Rating Scale scores were from .81 to .93. The mean score of the ADHD group on the K-IOWA was significantly higher than that of the normal group. The result of factor analysis showed that the K-IOWA was composed of 2 factors (Inattention/Overactive and Oppositional/Defiant). Conclusion : These results suggest that the K-IOWA rating scale is a very reliable and valid test and it would be useful in diagnostic evaluation and the treatment effect for ADHD children.
전자재료인 리드 프레임의 구조에 따른 이종재료간의 열응력해석과 접합부의 신뢰성
신영의,윤준호 중앙대학교 기술과학연구소 1994 기술과학연구소 논문집 Vol.24 No.-
This paper discusses distribution of thermal stress, strain at near the joint and investigates the reliability of solder joints of electronic devices on a printed circuit board. As Electronic devices are composed of different materials, thermal stresses generate at near the interface, such as solder joints and interface between IC device and lead frame pad due to the differences of thermal expansion coefficients. As results of thermal stress-strain, micro crack often occurs thermal fatigue fracture at the interface of different materials, The initiation and propagation of micro crack depend on the environmental conditions, such as storage temperature and thermal cycling. Finally, this paper experimentally shows a way to supress micro cracks by using Fe-Ni alloy clad lead frame, and investigates crack and thermal fatigue fracture of TSOP(Thin small outline package) type on printed circuit board.
신재범,이상영,김재수,박성희,임준석 韓國海洋大學校 附設 海洋科學技術硏究所 1992 硏究論文集 Vol.1 No.1
In the active sonar development, the reverberation is one of the major factors to be overcome like the clutter in the rader development. Unfortunately real reverberation data in various cases cannot be achieved so easily as real clutter data can be and there is a trend to build a simulator before a complex sonar system is developed. In the sonar simulator, the synthesized reverberation signal is necessary. In this paper we propose an algorithm to simulate the reverberation for the moving active sonar to use it in a simulator, and show some simulated results.
주석도금막을 이용한 마이크로 열원에 의한 이종전자재료의 접합성에 관한 연구
신영의,윤준호 중앙대학교 기술과학연구소 1994 기술과학연구소 논문집 Vol.24 No.-
This paper has been researched bondability of electronics devices, such as lead frame and the thick film of Ag/Pd on an alumina substrate by different heat sources. To obtain the bonds with high quality, it is very important to control both the thermal distribution of the bonds and its stability, because electronics components are composed of different materials. Therefore, this paper clarifies not only heat mechanism of micro parallel gap resistance bonding method and pulse heat tip bonding method but also investigates selection of heat sources with micro-electronic materials for bonding. Finally, this paper shows fluxless bonding process with filler metal such as plating layers.
규범행위에 있어서 죄책감과 수치심의 역할 : 이타 및 일탈행동의 예를 중심으로 The Case of Altruistic and Deviant Behavior
전신현,이성식 高麗大學校 社會學硏究會 1995 사회와문화 Vol.9 No.1
본 연구는 감정이 인간의 행동을 설명하는 데 있어 중요한 요인이 되는지에 관심을 갖는다. 특히 죄책감과 수치심에 초점을 두어 이들 감정이 도덕적 규범행동의 중요한 동기요인이 되는지를 이타행위와 일탈행위에 적용하여 살펴본다. 특히 본 연구는 죄책감과 수치심은 그 특성의 차이로 인하여 그 형성과정은 다른지 그리고 한국 사회의 특성과 관련하여 죄책감과 수치심간에는 이타 및 일탈행위를 설명하는 데 있어서 그 설명력의 차이가 존재하는지에 관심을 갖는다. 서울시 남녀 고등학생 789명을 대상으로 한 경험적 연구의 결과에서는 이타행위와 일탈행위에 있어 죄책감은 타자의 기대보다는 개인규범에 의해 보다 영향을 받으며, 수치심은 개인규범보다는 타자의 기대에 의해 보다 영향을 받는다는 것으로 나타났다. 또한 죄책감이 이타 및 일탈행위에는 영향을 주지 못하는 반면 수치심은 이러한 행위에 유의미한 영향력을 갖는다는 것을 보여주었다. 이는 개인규범보다는 타자와의 관계를 중시하는 한국사회의 문화적 특성에서 비롯된 것이라 볼 수 있다.