Current Status of Passive Solar Building Applications in the Republic of Korea

Auh, Paul Chung-Moo The Korean Solar Energy Society 1987 한국태양에너지학회 논문집 Vol.7 No.2

In the past few years, the subject of passive heating has been the major area of our concern due to the specific climate conditions prevailing in our region. More recently, however, other important issues such as retrofitting, passive cooling, optimized integration of conservation and passive solar, and daylighting have emerged as the areas of frequent discussions. KIER, the sole R&D organization in solar energy technologies, has accomplished significant results in passive building designs and actual demonstrations of experimental passive buildings. As a result of such endeavor by KIER, the passive solar buildings have been very well received by the Korean public. The current number of passive solar buildings in Korea is well over 1,600 (as of Dec. 1986). In this paper, broad aspects of the present status of passive solar technology utilization in Korea are presented.

A Steady-State Margin Comparison between Analog and Digital Protection Systems

Auh, Geun-Sun,Hwang, Dae-Hyun,Kim, Si-Hwan Korean Nuclear Society 1990 Nuclear Engineering and Technology Vol.22 No.1

A steady-state margin comparison study was performed between analog and digital protection systems. The systems compared are the thermal overpower and overtemperature delta T system of Westinghouse, and Core Protection Calculator System of Combustion Engineering, Inc. No dynamic offset was considered to eliminate the margin differences by different safety analysis methodologies. The result shows that the digital protection system has about 30% more rated power margin than the analog system in protecting against the fuel rod centerline melting. The digital protection system is shown to have almost same margin with the analog protection system in preventing the DNB at EOC (End of Cycle) even if the digital protection system has about 10% more margin at BOC(Beginning of Cycle).

Development of Transient Simulation Code for Pressurized Water Reactors

Auh, Geun-Sun,Ko, Chang-Seog,Lee, Sung-Jae,Hwang, Dae-Hyun,Kim, Dong-Su,Chae, Sung-Ki Korean Nuclear Society 1987 Nuclear Engineering and Technology Vol.19 No.3

A plant simulation code, MCSIM (Micro-Computer SIMulator), has been developed to simulate plant transient accidents for pressurized water reactors. Reactor coolant system is modeled using decoupled energy and momentum equations, drift flux two-phase flow model and integral momentum equation. A two-fluid pressurizer model is used to simulate the pressurizer dynamics. Pot Boiler model is used for steam generator, steady-state decoupled energy and momentum equations for secondary side system, and point kinetics equations for nuclear power calculation. For test of the present version of MCSIM, complete loss of flow and RCCA withdrawal accidents are calculated with MCSIM. The results are compared with those in FSAR of KNU 5 & 6.

Digital Dynamic Compensation Methods of Rhodium Self-Powered Neutron Detector

Auh, Geun-Sun Korean Nuclear Society 1994 Nuclear Engineering and Technology Vol.26 No.2

The best method is selected among the 3 digital dynamic compensation methods which are developed or applied for the Rhodium self-powered neutron detector. The three digital dynamic compensation methods are the existing Dominant Pol Tustin method of the COLSS(Core Operating Limit Supervisory System), the Direct Inversion method and Kalman Filter method. The Direct Inversion method is an improved method of D. Hoppe and R. Maletti and the Kalman Filter method is developed using the Kalman Filter. Response times of the compensated signals to achieve 90% of a step input are 28.1, 17.2 and 6.5 seconds respectively for the same noise gain telling that the Kalman Filter method is the best amens the 3 methods.

A Latent Variable Structure Equation Modeling Approach: Family Contexts Predicting School Adjustments Among Korean Secondary Students

Auh, Seong-Yeon,Kim, Eun-Joo The Korean Home Economics Association 2007 International Journal of Human Ecology Vol.8 No.2

Korean secondary school students (n=263) responded to surveys measuring their family contexts and school adjustment during the time period August-September 2004. Structure Equation Modeling tests were conducted to identify the nested model on school adjustment, a latent variable constructed with peer relations, teacher-adolescent relations, and academic attitude. In the nested model, parental involvement was a powerful predictor for school adjustment. Family conflict had a negative impact on school adjustment and was statistically significantly when correlated with the other predictors in the model. These finding suggested that family contexts play an important role in Korean adolescents' school adjustment. Hence, adolescents' perceived GPA level and satisfaction for school were important predictors for school adjustment.

Margin Benefit Assessment of A Digital Monitoring System for Existing Analog Plants

Auh, Geun-Sun,Yoon, Tae-Young Korean Nuclear Society 1994 Nuclear Engineering and Technology Vol.26 No.2

Margin benefits are quantatively assessed when a Digital Monitoring System(DMS) is assumed to be installed to an operating Westinghouse analog type plant. Applied plant and cycle is YongGwang Unit 1 Cycle 6. The referenced digital monitoring system is the COLSS (Core Operating Limit Supervisory System) of ABB-CE. Considered fuel design limits are DNBR and LDCA Fq. 2003-D Power distributions within the present CAOC (Constant Axial Offset Control) limits are calculated for the analysis. The most limiting DNB prevention event of CEA Withdrawal is analyzed with the ROPM (Required OverPower Margin) concept of ABB-CE. The result show that the DMS can bring around 7% more margins for both DNB and LOCA Fq standpoints of view. The DMS can also monitor the PCI (Pellet-Cladding Interaction) limits.

The Perceived Occupational and Clients' Natures by the Participants of the Long-term Care-services Providers' Education in Korea

Auh, Seong-Yeon,Paik, Sun-Ah,Kim, Eun-Joo Korean Society for Health Education and Promotion 2010 보건교육건강증진학회지 Vol.27 No.5

목적: 본 연구는 요양보호사 교육 수료생들을 대상으로 요양보호사의 업무 인지와 요양보호서비스 대상자 인지 정도를 예측변인들을 통해 검증함으로써 요양보호사가 인지하는 직업의 전문성 정도를 파악하는 것을 연구목적으로 한다. 방법: 응답자가 직접 기입하는 '자기기입식질문지법'을 이용하였고 불성실 응답 및 다문항 미기재 설문지를 제외한 총 2백83부를 분석에 사용하였다. 관련요소들의 기술적 통계를 통해 요양보호사 업무에 대한 인지 정도 및 서비스 대상자의 특성에 대한 인지 정도를 살펴보았다. 그리고 위 두 변수와 관련 요소들간의 상관관계를 알아보고, 어떠한 요소가 요양보호사 업무에 대한 인지 정도 및 서비스 대상자의 특성에 영향력을 갖는지 알아보기 위하여 다단계회귀분석을 실시하였다. 결과: 요양보호사 업무 인지에 관한 단계적 회귀분석에서 요양보호사는 전문직업이다(${\beta}$=.300)와 업무 특성에 관한 지식을 갖고 있다(${\beta}$=.254)가 유의미하게 나타났다. 또한 요양보호서비스 대상자 특성에 관한 단계적 회귀분석 결과로 가족들의 지지(${\beta}$=.187)와 요양보호사 업무인지 정도(${\beta}$=.509)가 유의미한 변인으로 밝혀졌다. 결론: 이상의 결과를 통해 본 연구에서 제기한 요양보호사 업무에 대한 인지정도 및 서비스 대상자 특성에 영향력을 갖는지에 대한 연구결과를 제시하였다. Objectives: The purpose of this study is to investigate the perception of LTCP trainees' on their professional. To accomplish the purpose, the perceived occupational nature and perceived clients' nature among the participants in the LTCP education are examined with the predicting variables. Methods: The participants of this study were composed of 320 people who have completed the long-term care provider certificate program. The participants were from 5 different long-term care provider licensing institution in the region of Gangdong-Gu, Seoul. Total of 320 self-administered questionnaires were distributed from June 2, 2008 to October 2, 2008 and 297 questionnaires were collected. Among them 283 surveys were analyzed. Results: In this model, active family support and recognition of task characteristics for the LTCP were the significantly predicting with beta of .187 and .507. The effect from active family support was remained significantly as model progressed. The magnitude of F-value and R-square value were significant. Conclusion: The results from this study will be helpful for the scholars who have investigated on the LTCP education program development as well as policy makers who have tried to supply dependable LTCP to the needy elderly and their families. In turn, the results from this study may empower constituents to make informed decisions about, and easily access, existing health and long-term care options.

Political Participation and The Life Cycle: The Case of Japan

Auh, Soo Young 연세대학교 동서문제연구소 1981 東西硏究 JOURNAL OF EAST AND WEST STUDIES Vol.10 No.2

Pattern of Newspaper Readership: A Korean Case

Auh, Taik Sup 연세대학교 동서문제연구소 1981 東西硏究 JOURNAL OF EAST AND WEST STUDIES Vol.10 No.1

This report reviewed some new trends and techniques in newspaper readership research and offered some suggestions for what editors can do to make their newspapers more appealing to their readers. It was argued in the paper that simple readership percentages should not be used as the sole judgmental criterion in deciding which items to push and which to drop. Factor analysis should be employed to find out which items cluster with other items before deciding which ones to cut back or drop. Another model for deciding what to inclued in a newspaper is Philip Meyer's "prioritization" model. The model combines a measure of interest in various subjects with a measure of whether or not such interest is associated with reading the newspaper. Meyer's model looks like this : Meyer argues that subjects in category A, which have relatively high levels of interest and a positive association between interest and readership of the paper, should be watched carefully because they could represent small but important market segments whose coverage should be, at the very least, maintained. Finally, Meyer advocates passing over subjects in category D, where interest is low and what interest there is has little or no asociation with reading the newspaper To draw a comparision with the Meyer's model, the McCombs model looks at readership patterns to infer whether a certain subject is drawing people to newapaper. The Meyer model directly measures the association between interest in a subject and newspaper readership. Future readership studies may utilize both the McCombs and Meyer models in deciding what to cut back or eliminate. That is, one could use the McCombs method to identify which items have low readership and are usually read in combination with other items, and the Meyer method to check on the level of interest in these items and whether this interest is associated with reading the newspaper.

Reactor Power Cutback Feasibility to a 12-Finger CEA Drop to Avoid Reactor Trips

Auh, Geun-Sun,Yoo, Hyung-Keun,Lim, Chae-Joon,Kim, Hee-Cheol,Lee, Sang-Keun Korean Nuclear Society 1995 Nuclear Engineering and Technology Vol.27 No.1

EPRI URD requires that the reactor be capable of accommodating an unintended CEA drop without initiating a trip and operating at a reduced power with ay single CEA fully inserted. YGN 3 and 4 reactors have 12-finger CEAs, and the CPCS will trip the reactor due to their large reactivities when one of them is dropped at a high power. The ABB-CE reactor power cutback system has been proposed to be used against the 12-Finger CEA drop to avoid the reactor trips. The results of study show that the reactor power cutback can prevent the reactor trips of the 12-Finger CEA drop when the CPCS has enough operating thermal margin (more than 9% for YGN 3&4 Cycle 1). It is noted, however, that the probability of a 12-Finger CEA drop is very low, less than one per 100 reactor years for YGN 3& and System 80$^{+}$ plants.