• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2004.11a
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• pp.317-322
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• 2004

As a construction project in urban area tends to be high-rise and huge, the importance of the project's underground work, in terms of the cost and the schedule, is gradually increasing. It's extremely significant to choose a proper filing method, at the stage of underground work. However, in piling work many change orders have been occurred since a piling method is experientially selected based on uncertain information and many earth factors to consider. It has effects on the cost and the schedule of the project. In this study, we have suggested a decision model for piling method that can be used to determine and verify the suitable piling method in design and pre-construction phase of a project. Based on historical data, a neural network model has already proven to be efficient. The tests of the model for selecting a suitable piling method have progressed exactly with the data of 150 piling works which were done room 2000 to 2004 in Korea. The optimization or the developed neural network model has progressed with the data for teaming. The validity of the neural network model has been verified.

• Journal of the Korea Institute of Building Construction
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• v.16 no.4
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• pp.331-339
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• 2016

According to high-rise, complexation, and enlargement of buildings, various construction methods are being developed, and the significance of construction method selection about main work types has emerged as a major interest. However, it has been pointed out that hand-on workers cannot consider project characteristics carefully, and they lack an objective standard or reference for main construction method selection. Hence, the selection is being made depending on hand-on workers' experience and intuition. To solve this problem, various studies have proceeded for construction method selection of main work types using Artificial Intelligence like Fuzzy, AHP and Case-based reasoning. It is difficult to apply many different kinds of construction method selection to every main work type with consideration for characteristics of work types and condition of a construction site when selecting construction method in the field. Accordingly, this study proposed the decision-making model which can apply to fields easily. Using matrix analysis and liner transformation, this study verified consistency of study models applied in the process of soil retaining selection with a case study.

• Journal of the Korea Institute of Building Construction
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• v.15 no.4
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• pp.405-412
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• 2015

The procurement of public construction, which has been selected mainly on the basis of the work experience of a department of public agencies that award construction contracts or those in charge of ordering, has not been executed through an objective selection process considering the construction types or characteristics. Thus, as a preliminary study on developing a model for the selection of contract methods, this study intends to analyze and present the key factors affecting the selection of procurement methods in public construction. Through a literature review on the existing methods, foundational factors were first presented, based on the analysis of these factors, the final influence factors were proposed. As a result, 6 factors contractor's characteristics, the environment of the construction market, relevant organization, the characteristics of a project, costs, and responsibility factors were determined, and 14 sub-factors were selected. The factors presented in this study will be used as base data for developing a decision making support model for the selection of contract methods in public construction.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.1375-1379
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• 2009

본 연구에서는 하천유역의 홍수유출을 계산하는데 있어 입력인자로 사용되는 도달시간과 저류상수 등을 산정하는 데 있어 사용되는 경험식들의 조합에 따른 도달시간을 구하고 홍수유출량의 변화양상과 도달시간을 비교하였다. 본 연구에서는 FRIEND 대표유역인 금호강 유역에 대해 도달시간을 산정하여 비교하였다. 여기서, 각 소유역에 대한 도달시간 산정은 단일 도달시간 공식의 적용과 도달시간을 유입시간과 유하시간의 합으로 고려한 적용으로 크게 구분하였으며, 도달시간 및 유입시간 산정에는 Kirpich, Kerby, Kraven, Rziha, Friend 및 Bransby 공식을 적용하였고 유하시간 산정은 SCS 평균유속법을 적용하였다. 국내의 경우 도달시간의 산정은 자연하천유역과 도시하천유역으로 크게 구분하고 있으며, 유입시간 및 유하시간 등으로 구분하지 않고 자연하천유역과 도시하천유역에 적합한 도달시간 산정에 대한 경험식을 제시하고 있다. 또한 도달시간의 산정기법은 외국의 여러 연구자들에 의해 개발된 경험공식이 주를 이루고 있으며 각 경험공식의 제한사항 및 검토결과 등을 감안하여 해당유역에 적절한 공식을 수자원 기술자의 판단을 통해 사용해야 할 것으로 사료된다.

• Journal of the Korean earth science society
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• v.31 no.3
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• pp.276-287
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• 2010

The purpose of this study is to develop a measurement tool quantifying the degree of high school students' scientific experience. Based on previous studies, we divided the factors that compose school scientific experience into three categories: general activity experience, scientific inquiry experience and laboratory apparatus experience. While, outside of school scientific experience was divided into general activity experience, interesting activity experience and field trip experience. Items consisting each factor were selected from scientific experience measurement tools used in previous researches, most frequent answers showed in open questionnaire about scientific experiences, and exploratory analysis of textbooks. After the measurement tool developed by pilot-questionnaires and previous researches were preliminary tested and then was secondarily tested for a group of 413 high school students. The content validity and construct validity of the measurement tool was evaluated by two school teachers and two experts in science education and by factor analysis, respectively. The reliability of the tool was estimated with Cronbach Alpha. The results of validity and reliability revealed that the tool was appropriate for measuring scientific experience.

• The Journal of the Convergence on Culture Technology
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• v.1 no.2
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• pp.53-64
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• 2015

The purpose of this study was to analyze the smoking experience and attitude including affect factors to smoking for elementary schoolers. The cross-sectional descriptive study design was used. We selected 810 students from 14 elementary school located in Chungchung-do and Gangwon-do by convenience random sampling and received IRB from Y Univ. 810 students were included in the final analysis using generalized linear model. Among 810 students, 7.3% of students reported to have smoking experience. The result of analyzing the smoking affect factors for smoking students who were having friends who had smoking experience, unable to smoking suggestion and those who were male, had significantly more smoking experience. According to the results of this study, there should be an intensive tailed smoking related program development for male elementary students, especially for smokers who have smoking friend and including smoking refusing program. And the school system services of elementary school should be strengthened to protect the elementary students from further the critical situation caused by smoking experience.

• Journal of Educational Research in Mathematics
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• v.23 no.2
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• pp.269-284
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• 2013

The aim of this paper is to explore and understand, using in-depth interviews, the participant's motivation for becoming a math teacher, ways of dealing with university math knowledge and private tutoring experiences. In addition a larger aim is to understand how the individual's interest in mathematics and turing are linked to his/her larger personal tendencies contrasting secondary and university math learning. In-depth interviews were conducted with 6 pre-service teachers' subjective experiences focusing on motivation and feelings on mathematical knowledge and private tutoring. The output of this research consists of 3 cases, highlighting and conceptually developing the specific aspects under study; different ways in which individuals' involvement with the math learning and tutoring that might be connected with the ways of becoming teachers. Larger aspects of pre-service teachers' subjective experiences were sketched by contrasting the inner aspects of the individuals. Several suggestions were presented at the end with the possible research directions for math education.

• The Journal of the Korea Contents Association
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• v.17 no.6
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• pp.514-526
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• 2017

This study examined the experiences and meanings of career transition becoming a counselor by examining the experiences of career transition process before two women became counselors through the narrative inquiry method. To do this, two counselors with career counseling qualifications and two or more career transition experiences were selected as research participants. The results are as follows. First, they had several career experiences without having the opportunity to think about their interests or aptitudes. Second, it was an experience that career transition adapts itself. Third, as they went through various occupations, they gradually went to the work and study they wanted. Fourth, They were satisfied with the profession of the counselor they had chosen, and they were inspecting themselves as a counselor. In this study, it is meaningful to accept the career transition as a part of life and to confirm the meaning of career transition experience as a counselor walking the path of counseling specialist.

• The Journal of the Korea Contents Association
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• v.18 no.5
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• pp.343-356
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• 2018

The purpose of this study was to explore the domestic violence experience of military's spouses and its impacts on child abuse and child's growth retardation. Then, the social work interventions were identified to curtail domestic violence experience and its impact on family including their spouses and children. The primary data was collected in 2015 by interviewing two hundred thirty eight spouses of military personnels, the military service 3 unit, the navy service 2 unit, the airforce service 2 unit. The result showed that children of the military families experienced emotional abuse (51.4%), physical abuse (28.9%) and neglect (3.8%). And an association between childhood experience of abuse and perpetration of child abuse was found with a perfect mediation effect of family conflict. Based on the results, social welfare intervention program was suggested to reduce domestic violence among military families in South Korea.

• Journal of the Korean Society for information Management
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• v.41 no.2
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• pp.353-374
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• 2024

This study aimed to delve into the personal experiences of academic librarians as they perform their duties, seeking a holistic understanding of their professional experiences and the subjective experiences underlying them. To this end, the study conducted in-depth interviews with librarians, who were selected as research participants from private four-year universities, and analyzed the collected data using Giorgi's phenomenological analysis method. The findings reveal that the experiences of academic librarians can be summarized as "ambivalent perceptions of the librarian profession," "discrepancies between expectations and reality," "discriminatory personnel practices within university organizations," "growth and limitations derived from professional experiences," and "adaptation and anxiety in response to rapid environmental changes." A closer examination indicated that academic librarians continuously experience and resolve dilemmas within complex contexts. The findings of this study are expected to deepen the understanding of the profession of academic librarians and contribute to the development of practical strategies for workforce management and the improvement of working conditions.