• Korean Journal of Child Education & Care
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• v.18 no.3
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• pp.77-90
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• 2018

Objective: The objective of this study is to find out the relationship among early childhood teachers' social support, teacher efficacy, and resilience, and the effects of social support and teacher efficacy on early childhood teachers' resilience. Methods: The study was conducted with 282 teachers working in kindergartens and day care centers located in Jeollabukdo, The data were analyzed using Pearson's Product-Moment Correlation Analysis, and Stepwise Multiple Regression Analysis. Results: The results of this study are as follows. First, significant positive correlation appeared among early childhood teachers' resilience, social support, and teacher efficacy. The whole social support showed positive correlation in all sub-factors of resilience, and the whole teacher efficacy did positive correlation in all sub-factors of resilience. Second, according to the results of the study of the effects of social support and teacher efficacy on early childhood teachers' resilience, personal teacher efficacy, material support, and general teacher efficacy acted as significant factors in their whole resilience. Conclusion/Implications: In conclusion, this study suggests that improving resilience should be backed up by self-improvement of teachers who are able to upgrade teacher efficacy, and social support.

• Journal of the Korean Geosynthetics Society
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• v.18 no.4
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• pp.263-272
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• 2019

This paper describes the results of bearing capacity using field loading test of pile, in order to extend the applicability of drilled shaft with mid-size, and the results were compared with the prediction results of design bearing capacity by empirical formular. The static load test result showed that the allowable bearing capacity of high pile strength was about 2.4 times higher than that of low pile strength. The dynamic load test result showed that the allowable bearing capacity of high pile strength was about 1.4 times~1.5 times higher than that of low pile strength. The comparison result of allowable bearing capacity between static and dynamic load test showed that the difference of allowable load ranged from 3% to 6% under the same settlement conditions. As a result of comparing the ultimate bearing capacity by load test and design bearing capacity, it was found that the FHWA proposed equation could be more reasonable than the other proposed equation in load sharing ratios of end bearing and skin friction.

• Journal of the Korean earth science society
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• v.31 no.1
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• pp.18-35
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• 2010

Facies analysis of the Late Triassic Hajo Formation, the lowest stratigraphic unit in the Chungnam Basin, shows that the lower part is composed mainly of breccias or conglomerates; the middle part, conglomerates; and the upper part, conglomerates and sandstones. The formation consists of 13 facies, which include horizontally stratified clastsupported conglomerate, clast-supported massive breccia, matrix-supported massive breccia or conglomerate, matrixsupported graded conglomerate, massive pebbly sandstone, horizontally laminated sandstone, massive sandstone, graded sandstone, inversely graded sandstone, planar cross-bedded sandstone, trough cross-bedded sandstone, low angle crossbedded sandstone, and massive mudstone. These are grouped into 4 facies associations (FA). FA I consisted of clastsupported and matrix-supported massive breccias presumably deposited in the talus or upper fan delta environment. FA II consists of matrix-supported massive conglomerate and horizontally stratified clast-supported conglomerate of cobble size and it seems to have been deposited in the upper fan delta environment. FAIII consisted of matrix-supported massive conglomerate of pebble size, horizontally laminated sandstone and massive sandstone may have been deposited in the middle fan delta environment. FAIV consists of massive pebbly sandstone, horizontally laminated sandstone and massive sandstone and presumably was deposited in the lower fan delta environment. In general the Hajo Formation is interpreted to have been deposited at the talus/upper fan delta environment in early stage; it might have been deposited in the alternating environments of upper and middle fan delta in middle stage; and it seems to have been deposited in alternating environments of middle and lower fan delta in late stage.

• Survey Research
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• v.13 no.1
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• pp.113-134
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• 2012

It is very vital for the presidential preference not only to be a political achievement of the president himself, but also to be an influential base of people-related policy and its implementation. The purpose of this study is to provide the newly developing ideas to compose an appropriate question and to point out the present problems in the utilization of survey results. At first, it turned out to be inappropriate to make a question for evaluation of presidential job approval in the perspective of questionnaire planning. As the respondents were not informed of what the president did, so they were more likely not to know whether the president did well or not. Secondly, the correlation analysis has been made between the evaluation question of the presidential job approval and policy-related questions including the direct one for the presidential preference in the aspect of statistical analysis. Through this process, evaluation of the presidential job approval is not accountable and the direct question for the presidential preference is at best explainable. In conclusion, it seems more persuasive to compare the statistical outcome of the presidential preference which has been derived of to the high rating what the respondents think comprehensively not depending on a subjective decision by mass media.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.25 no.2
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• pp.112-121
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• 2013

The calibration of resistance factor in reliability theory for limit state design of gravel compaction piles (GCP) requires a reliable estimate of ultimate bearing capacity. The static load test is commonly used in geotechnical engineering practice to predict the ultimate bearing capacity. Many graphical methods are specified in the design standard to define the ultimate bearing capacity based on the load-settlement curve. However, it has some disadvantages to ensure reliability to obtain an uniform ultimate load depend on engineering judgement. In this study, a well-fitting nonlinear regression model is proposed to estimate the ultimate bearing capacity, for which a nonlinear regression analysis is applied to estimate the ultimate bearing capacity of GCP and the results are compared with those calculated using previous graphical method. Affect the resistance factor of the estimate method were analyzed. To provide a database in the development of limit state design, the load test conditions for predicting the ultimate bearing capacity from static load test are examined.

• Korean Journal of Human Ecology
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• v.6 no.1
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• pp.15-27
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• 1997

The purpose of this study was to examine the effects from social supports and global self-worth on stresses for the children. The subjects were 438 children of the 5th grade in Elementary School and the first grade in Junior High School in Taejeon. The instruments used for this study were Children's Social Support, Global Self-Worth and Stress Scale. The data were analyzed using t-test, Pearson's correlation, multiple regression and path analysis. The main results of the study were as follows; 1. The stresses were different depending on age. When the family and the teacher give higher social supports, the 5th graders have higher global self-worth. When the family gives higher social supports, the stresses were decreased for the 5th graders. When the children have higher global self-worth, the stresses were decreased. 2. When the first graders in Junior High School experienced higher global self-worth and social supports from their friends, family, teacher, the stresses were decreased. 3. The first graders in Junior High School experienced more stresses than the 5th graders in Elementary School in parent-related and academic-related domains. But the first graders in Junior High School experienced less stresses than the 5th graders in Elementary School in friend-related domains. 4. The path analysis showed that social supports from friends and family explained 15% of the stresses for the 5th graders in elementary school. Social support from friends, family, and teacher explained 28% of the stresses for the first graders in Junior High School. 5. For the 5th graders in Elementary School, social supports from friends and family had direct influences on the global self-worth. And the global self-worth had direct influence on children's stresses. But for the first graders in Junior High School, social supports from friends, family, and teacher had direct influences on the global self-worth. And the social supports from friends had direct and indirect effects on children's stresses. 6. For predicting the stresses, the most significant variable was the global self-worth for the 5th graders in Elementary School and the first graders in Junior High School.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.33 no.11
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• pp.88-94
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• 2005

This paper is a study on the blade-type optical bench satisfying stiffness and thermal pointing error requirements for earth observation satellite. According to shape requirements, optical bench is designed. Because it does not satisfy the stiffness requirement, the stiffener is added on the outer/inner area of optical bench. But it does not meet the thermal pointing error requirement. So symmetrical structure is suggested with platform support structure attached on the upper/lower part of platform. Although it has better value than previous case, it still does not meet the thermal pointing error requirement. Based on the results of prior cases, optical bench finally designed, which satisfied both the stiffness and thermal pointing error requirements. Next conclusions follow from this design. It is efficient to increase thickness of platform facesheet, add stiffener and increase blade number to raise stiffness. It is effective to connect component consisting of same material and design optical bench having symmetrical structure to lower thermal pointing error.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.5
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• pp.470-479
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• 2018

This is an empirical study aiming to analyze the relations between positive psychological capital, social support from the school director and fellow teachers, and happiness of childcare teachers in charge of young children with disabilities. In addition, we analyze the mediating effects of social support from the school director and fellow teachers on the relation between positive psychological capital and happiness. To achieve these aims, a survey was conducted targeting 205 childcare teachers in Gyeonggi province. Results of this study are as follows: First, there were significantly positive correlations between positive psychological capital, social support, and happiness. Furthermore, positive psychological capital and social support from the school director and fellow teachers had positive effects on the happiness of childcare teachers. Second, the social support from the school director and fellow teachers had partially mediating effects on the relation between positive psychological capital and happiness. This implies that positive psychological capital and social support from the school director and fellow teachers play essential roles in the enhancement of happiness of childcare teachers.

• Journal of Korean Home Economics Education Association
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• v.17 no.3 s.37
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• pp.1-15
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• 2005

The purpose of this study was to investigate adolescents' internet addiction tendencies according to their human resources which is composed of personal resources and interpersonal resources. The subjects of this study were 396 middle school students in Daegu. Analysis of data were done with the use of frequency. percentage, meat factor analysis, and MANOVA with the Scheffe test applied. The main results of this study were as follows : First, there were meaningful differences in adolescents' internet addiction tendencies according to their personal resources such as self-control ability, Problem-solving ability, and time management ability. Second, there were meaningful differences in adolescents' internet addiction tendencies according to their interpersonal resources such as parents-support, peer-support, and teacher-support.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.27 no.5
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• pp.235-242
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• 2017

In order to prepare porous scaffolds capable of pore control, PMMA powder serving as a pore-forming agent was added to HA powder to synthesize a slurry containing TBA as a solvent. And then, porous HA scaffolds where pillarshaped pore channels interconnected with each other were fabricated by freeze-casting and sintering. The crystal structure of the HA scaffolds according to the addition amount of PMMA powder was measured by XRD and the surface and inner cross section of the scaffolds were analyzed through SEM. It was found that removal of PMMA during sintering affects the internal structure of the scaffolds and the crystallinity of the HA powder. Furthermore, through evaluating the physical and mechanical properties of the scaffolds, it was confirmed that the porosity, pore size and compressive strength can be controlled by controlling the addition amount of the pore-forming agent. It was also found that the HA scaffolds produced in this study were similar in structure and properties to the natural cancellous bone. This suggests that porous HA scaffolds with PMMA can be used as an alternative to autogenous bone for tissue engineering as an artificial bone scaffold.