• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2005년도 춘계 학술발표회 논문집
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• pp.1275-1282
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• 2005

This paper deals with the numerical study for excavation crossing the fault zone and the change of support pattern in field. The numerical analyses by FLAC program were performed to evaluate the suitable support pattern influenced by the width of Fault Zone, considering rock mass condition(RMR classification). Based on the results, it is found that partial reinforcement or degrading support pattern is suitable, when the width of Fault is under 3m. But when the width of Fault is more than 6m(0.5D), extra support pattern for fault zone is acceptable. At field, this result is generally used as a guide in the construction of roadway tunnel, but it is also possible to vary this assessment along the condition of fault.

• 한국환경보건학회지
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• 제27권1호
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• pp.100-105
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• 2001

Microstructural examinations were performed on the anaerobic biofilm from reactor filled with PE support media. Optical microscope, SEM and fluorescent microscope were used for qualitative and morphological studies on the attached microorganism under anaerobic condition. Microorganisms were attached in crevices where protection from shear forces of surfaces where easy to contact with support media surface. A hypothesis for biofilm accumulation occurs on a surface such as polymer support media is presented schematically : 1st step ; cell-support media attachment, 2nd step ; cell-support media attachment and cell-cell attachment, 3rd step ; attached biofilm from neighboring crevices joins together and growing, 4th step ; mature and irregualar biofilm was formed. In SEM photographs, shape and structures of biofilm were observed, but microorganism species and methanogens were not identified. A large number of methanogenic bacteria were identified on the surface of PE substratum by fluorescence under 480nm of radiation and it was estimated that methanogenic bacteria was related to initial attachment of bacteria under anaerobic condition.

• 가정과삶의질연구
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• 제31권5호
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• pp.65-77
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• 2013

This study was aimed at (1) investigating expectant mothers' prenatal attachment according to variables (age, gestational weeks, perceived health condition, anticipating the gender of the fetus, marriage duration, and parity), (2) analyzing correlations among their prenatal attachment, spousal support, and parenting efficacy, and (3) examining the role of prenatal attachment as a mediator between spousal support and parenting efficacy. For this purpose, 221 expectant mothers living in Seoul completed a 55-item survey. The collected data were analyzed by t-test, one-way ANOVA, Pearson's correlation coefficients, and regression analyses. The findings of this study were as follows. First, among the variables, gestational weeks, perceived health condition, marriage duration, and parity showed significant differences in the scores for the overall prenatal attachment and subordinate factors. Second, there were positive correlations between the expectant mothers' prenatal attachment and spousal support and between their prenatal attachment and parenting efficacy. Third, the expectant mothers' prenatal attachment proved to mediate between spousal support and parenting efficacy. These findings shed light on the significance of prenatal attachment and spousal support during the pregnancy period; therefore, it is essential to develop education programs for expecting parents to enhance prenatal attachment and spousal support and to conduct follow-up studies to verify the effectiveness of the programs.

• 대한간호학회지
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• 제30권3호
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• pp.670-681
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• 2000

The purpose of this study was to identity the level of burden, social support and quality of life of the subjects. The subjects of this study were 68 mothers of nephrotic syndrome patients whose children were hospitalized in one pediatric ward of the University Hospital in Seoul. The data was collected using questionnaires, and the period of the data collection was from Nov. 15 to Dec. 31, 1999. The instruments used for this study were the Burden Measurement Instrument developed by Montgomery et. al(1985), social support measurement instrument designed Brandt an Weinert(1978) and Quality of life scale designed by Ro,Yoo JA(1988). The data analysis was done by SPSS, t-test, ANOVA and the Pearson correlation coefficient. The results of were as follows. 1. The level of burden showed a mean score of 54.47, the level of social support, a mean score of 86.00 and the level quality of life, a mean score of 140.20. 2. The level of burden differed according to mother's religion, patient's purpose for admission and perceived patient's condition by mothers. 3. The level of social support and the level of quality of life differed according to perceived patient's condition by mothers. 4. There was a negative correlation between burden and social support(r=-.348, p<.001). Also, burden was negatively related with quality of life(r=-3.97, p<.001). Social support was positively related with quality of life(r=.064, p<.001).

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2000년도 봄 학술발표회논문집
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• pp.253-259
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• 2000

This thesis investigated the behavior of super structure by varying the factors such as the change of pile rigidity, the characteristics of soil and the constraint condition of support. The results of this study are as follows; 1. The pile rigidity in the Fig 3.3 computed by the rotating deformed plane method becomes the elastic range at approximately about 5.1 m (D : 1.0 m) below the ground level. This result is consistent with the previous study that the pile deformation occurs approximately 3 to 6 times pile diameter from the pile head. 2. The values of forces and deformations for the structure-pile system in Y-direction appeared larger than that in X-direction, since the pile rigidity and constraint condition of support were changed as shown Fig.3.5 to 3.8. 3. The current practice for the analysis of structure-pile system has not considered the variation of pile rigidity and the constraint condition of support. So, the analysis of structure-pile system with large difference in super-structure rigidity must includes these factors in both X and Y directions.

• Journal of Welding and Joining
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• 제17권5호
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• pp.55-60
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• 1999

In thin plate welding, welding deformation is deformation is produced in special form like buckling distortion, which is different from one in thick plate welding, large quantitatively, and has complicated form. Therefore, a particular countermeasure to prevent the welding deformation in manufacturing process is requested. Otherwise it takes more time to straighten the welding deformation than to fabricated a steel structure newly and in case of failing to straighten the welding deformation in beginning of the flame straightening process, even if the flame straitening is completed, the appearances is not good and sometimes eve refabrication is needed. To minimize these problems. In this present paper, the effects of the condition of support pin on out-of plane deformation produced by thin plate Butt welding in investigated through experiment and the countermeasure to prevent the welding deformation in suggested.

• 생물환경조절학회지
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• 제17권3호
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• pp.188-196
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• 2008

본 연구는 소형 파이프하우스 설계시 구조계산에 필요한 지점조건을 구명하기 위하여 실물크기의 파이프 하우스에 환산된 적설하중 및 풍하중을 재하하여 온실의 붕괴양상과 변위 및 변형도를 측정하였으며, 측정값을 여러 가지 지점조건에 대해 구조해석한 값과 비교 분석하였다. 온실에 작용하는 적설 및 풍하중의 등분포 하중을 집중하중으로 환산할 때 환산된 집중하중의 개수별로 하중효과를 비교 분석한 결과, 적설하중의 경우 최소 2개 이상의 집중하중으로 환산하는 것이, 풍 하중의 경우 각각의 등분포된 수압면의 하중을 1개씩의 집중하중으로 환산하는 것이 등분포하중과 유사한 하중효과가 나타나는 것으로 분석되었다. 변형도의 변화를 분석한 결과 적설하중 작용시에는 예측된 바와 같이 처마부위에서 붕괴된 것으로 나타났으며, 풍하중 작용시에는 풍상측의 처마와 지점부위의 변형이 가장 크게 발생하였고 다음으로 풍하측의 처마와 곡부의 변형이 크게 발생하였으며, 가장 큰 변형을 나타낸 처마가 위험부위로 판단되었다. 응력과 변위에 따른 지점조건을 분석한 결과 지점조건에 따른 변위의 크기는 변위방향과 모델종류에 관계없이 모두 지면고정 <지하고정<지면힌지<지하힌지 순으로 나타났으며, 별도의 기초 없이 서까래를 땅속에 바로 매입하여 설치하는 소형 파이프 하우스의 구조설계시 지점조건을 매입깊이에서의 지하고정으로 하는 것이 바람직할 것으로 판단 되었다.

• 가족자원경영과 정책
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• 제10권2호
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• pp.127-149
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• 2006

The purpose of this study was to survey actual condition of a municipal Healthy family Support Center(HFSC) for establishing. 46 subjects were surveyed with a questionnaire about PR and facilities of Healthy Family Support Center. For this study, not only a survey was collected 46 subjects bust also a spot inspection was executed to 8 municipal Healthy Family Support Centers. This study revealed following results: first, the mass media(TV, news paper), internet home page, pamphlet are effective medium. Management of PR activities in the HFSC is consider as one of the main factor to decide development and survival in social community. Therefore HFSC should search fur various method and system of PR. Secondly, the size and facilities of HFSC should be designed according to the specific characteristics of HFSC equipped with office-room, conference room, lecture hall, general/special counseling room, group classroom. Results from this study might be contributed to operate a municipal Healthy Family Support Center in the near future.

• Structural Engineering and Mechanics
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• 제60권2호
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• pp.193-209
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• 2016

In this study, wave force tests were carried out for the four types of offshore support structures with scale factor 1:25 and wave forces to the support structure shapes were investigated. As the results of this study, it was found that, as the wave period increased at the normal wave condition, wave force decreased for the most cases. Extreme wave force was affected by the impact wave force. Impact wave force of this study significantly effect on Monopile and slightly on GBS and Hybrid type. Accordingly, Hybrid type indicated even lower wave force at the extreme and irregular wave conditions than the Monopile although Hybrid type indicated higher wave force at the normal wave condition of the regular wave because of the larger wave area of wave body. In respects of the structural design, since critical loading is extreme wave force, it should be contributed to improve structural safety of offshore support structure. However, since the impact wave force has nonlinearity and complication dependent on the support structure shape, wave height, wave period, and etc., more research is needed to access the impact wave force for other support structure shapes and wave conditions.

• Journal of Astronomy and Space Sciences
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• 제37권4호
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• pp.237-247
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• 2020

The ground tracking support is a critical factor for the navigation performance of spacecraft orbiting around the Moon. Because of the tracking limit of antennas, only a small number of facilities can support lunar missions. Therefore, case studies for various ground tracking support conditions are needed for lunar missions on the stage of preliminary mission analysis. This study analyzes the ground supporting condition effect on orbit determination (OD) of Korea Pathfinder Lunar Orbiter (KPLO) in the lunar orbit. For the assumption of ground support conditions, daily tracking frequency, cut-off angle for low elevation, tracking measurement accuracy, and tracking failure situations were considered. Two antennas of deep space network (DSN) and Korea Deep Space Antenna (KDSA) are utilized for various tracking conditions configuration. For the investigation of the daily tracking frequency effect, three cases (full support, DSN 4 pass/day and KDSA 4 pass/day, and DSN 2 pass/day and KDSA 2 pass/day) are prepared. For the elevation cut-off angle effect, two situations, which are 5 deg and 10 deg, are assumed. Three cases (0%, 30%, and 50% of degradation) were considered for the tracking measurement accuracy effect. Three cases such as no missing, 1-day KDSA missing, and 2-day KDSA missing are assumed for tracking failure effect. For OD, a sequential estimation algorithm was used, and for the OD performance evaluation, position uncertainty, position differences between true and estimated orbits, and orbit overlap precision according to various ground supporting conditions were investigated. Orbit prediction accuracy variations due to ground tracking conditions were also demonstrated. This study provides a guideline for selecting ground tracking support levels and preparing a backup plan for the KPLO lunar mission phase.