• Proceedings of the Korean Society of Computer Information Conference
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• 2023.01a
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• pp.205-208
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• 2023

양식장에서 최적의 생육환경을 유지할 수 있는 제어시스템 개발을 위해 수질에 영향을 미치는 요인들의 상관관계 분석을 위한 머신러닝 모델을 개발하고자 한다. 데이터간의 상관관계 분석 및 예측모델 생성을 위해 알고리즘의 결정계수와 MSE, RMSE 등의 수치를 통하여 데이터의 적합성을 검증하고자 한다.

• Korean Journal of Culture and Social Issue
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• v.20 no.4
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• pp.443-467
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• 2014

The purpose of this study was to analysis the causal model between self-directedness, learning flow, career decision and self-efficacy, and career exploration behavior of undergraduate students. A survey was conducted on 604 undergraduate students, and Structural Equation Modeling was used to analyze. The major findings were as follows: First, learning flow and career decision self-efficacy were found to have positive impacts on career exploration behavior. However, self-directedness was found to have no significant direct impacts on career exploration behavior. Second, self-directedness was found to have positive impacts on learning flow and career decision self-efficacy. Finally, learning flow and career decision self-efficacy were found to have perfect mediating effects on the relationships between self-directedness and career exploration behavior. Considering the size of the specific indirect effect, the mediating effects of learning flow was relatively larger than those of career decision self-efficacy. Based on the results, discussions to increase career exploration behavior were made as well as suggestions for future research.

• Korean Journal of Construction Engineering and Management
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• v.9 no.5
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• pp.159-167
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• 2008

This study provides a effective approach to the construction management problem with the limited number or amount of available resources using the analytic hierarchy process. Construction management is a series of decision making processes for planning and controling of cost, time and quality as main objectives in construction works. When several activities need the limited same resource at the same time, it is very hard to decide the priority of the activities in the real situations. For that the scientific decision making method and procedure for resource allocation are required. This study solves the resource allocation problem by dealing with the decision making problem which the activities are distributed to multiple projects and under multiple criteria. The analytic hierarchy process is a method devised to solve complex multi-criteria decision problems. The result shows that this study can be effectively used to make decisions in situations involving multiple objectives by evaluating the prioritized ranking and degree of the activity alternatives based on the overall preferences.

• The Journal of the Korea Contents Association
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• v.19 no.8
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• pp.265-275
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• 2019

The purpose of this study is to validate scale of deteminants for watching Korean traditional music performances to activate the market by procuring and increasing Korean traditional music performance consumers that exhibit generally low preference in the performance market. Accordingly, FGI was conducted on seven employees and professionals in the arts and cultural sector and then open survey results were categorized into eight factors and a total of sixty-five items using the KJ method to find the viewing decision factors per consumer type of Korean traditional music performances. Afterwards, a six-factor and thirty-five items were extracted after conducting an exploratory factor analysis and confirmatory factor analysis was conducted to verify the structural appropriateness, and then the feasibility of the composition of Korean traditional music performance viewing decision factor scale was verified. Results of the analysis showed that first, for general Korean adults making decisions to view Korean traditional music performances, there was positive impact in the order of interest-creating factors, fame and talent factors, emotional and information factors, creativity factors, reasonable price factors, and social relation factors. Second, the general tendency of decision factors to view Korean traditional music performances showed relatively high levels in reasonable price factors and interest-creating factors among the Korean traditional music performance viewing decision factors, while emotional and information factors were found to be relatively low.

• Journal of the Earthquake Engineering Society of Korea
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• v.8 no.5 s.39
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• pp.55-64
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• 2004

In this paper, the preliminary design procedure of magnetorheological (MR) dampers is developed for controlling the building response induced by seismic excitation. The dynamic characteristics and control effects of the modeling methods of MR dampers such as Bingham, biviscous, hysteretic biviscous, simple Bouc?Wen, Bouc?Wen with mass element, and phenomenological models are investigated. Of these models, hysteretic biviscous model which is simple and capable describing the hysteretic characteristics, is used for numerical studies. The capacity of MR damper is determined as a portion of not the building weight but the lateral restoring force. A method is proposed for optimal placement and number of MR dampers, and its effectiveness is verified by comparing it with the simplified sequential search algorithm. Numerical results indicate that the capacity, number and the placement can be reasonably determined using the proposed design procedure.

• Journal of Internet Computing and Services
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• v.5 no.5
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• pp.105-117
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• 2004

As the organization has been coming to specialization and systematization, meetings have been holding for communication among members and deduction of rational outcome. Also process of meeting procedure has been developing. Those on-line meetings are getting grown because the on-line meetings with messenger and chatting are the best examples for overcoming space limitation problem. But, the on-line meetings have unavoidable weak points. The more a meeting is processed, the more point of argument is out of focus and perception of current situation is reduced. Therefore, this thesis proposes and describe that in introduction, think that pre-defined things, analysis and direction of Ontology, in body, draw up a plan how to make ontology to knowledge, and, how to get out of bounds limitation that as make ontology to knowledge. And, design and implementation actual system that organize this ontological Knowledge, and then managing and summarizing visualizing them. Also, in conclusion, after remark and consider this system in which using the ontology based on XML, and proposes conculsion and directional development point.

• The Journal of Korean Association of Computer Education
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• v.19 no.2
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• pp.51-60
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• 2016

This study has two major purposes. One is to find out the impact of learning programming language on deciding major for freshmen who enter the university without specific major and decide their majors from sophomore. Another is to compare between 2015 group without specific major at freshmen and 2013 group who were not required to take program language courses. Our study has several important implications. First, this study is the first attempt to figure out the effects of the program language education on deciding major. Secondly, one can predict the effects and importance of software education which is going to imply to all highschool students starting from 2018. Thirdly, software education may help to alleviate science and engineering aversion.

• Spatial Information Research
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• v.17 no.3
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• pp.251-259
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• 2009

As a result of the current trend towards promoting conservation of the ecosystem, there have been various studies conducted to determine ways to establish an ecological network. The development of analytical methods and an environmental database of GIS has made the creation of this network more efficient. This study focuses on the development of an urban spatial decision support system based on 'Landscape Ecology Theory'. The spatial decision support system suggested in this study consists of four stages. First, landscape patch for the core areas, which are major structures of the ecological network, was determined using the GIS overlay method. Second, a forest habitat was investigated to determine connectivity assessment. Using the gravity model, connectivity assessment at the habitat forest was conducted to select the needed connecting area. Third, the most suitable corridor routes for the eco-network were presented using the least-cost path analysis. Finally, a brief investigation was conducted to determine the conflict areas between the study result and landuse. The results of this study can be applied to urban green network planning. Moreover, the method developed in this study can be utilized to control urban sprawl, promote biodiversity.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.391-391
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• 2016

유수동역학적인 요소와 유사의 부유는 서로 상호작용을 주고받으며 다양한 현상을 만들어낸다. 많은 선행연구를 통해 유사 농도 등의 특성이 난류 구조 등의 변화를 야기하며, 변화한 난류 구조 역시 유사의 부유 등에 2차적인 영향을 준다는 점이 확인되었다. 본 연구에서는 가는 유사에 보다 집중하여 유사 부유와 이에 따른 연직구조 특성의 변화를 살펴본다. 본 연구에서는 1차원 연직 모형을 이용하여 수치실험을 수행한다. 본 연구에 이용된 모형은 가는 유사의 특성인 빠른 입자 반응 시간(Particle Response Time)이 가정되는 모형으로 선행연구를 통해 적용성이 검증된 것으로 판단한다. 주요 분석대상은 유사의 농도와 속도경사 간의 관계 등이며, 분석하는 유사 농도 종류는 일반적인 비점착성 유사의 경우에 관심을 가지는 질량 농도에 집중하여 결정된다. 수치실험 수행을 위해서는 정류 흐름, 진동파 흐름 등이 적용되었고 다양한 경우의 가는 유사를 고려하기 위한 실험조건의 변경이 이루어졌다. 수치실험 결과 진동파의 다양한 위상에서 조금씩 달라지는 연직구조가 확인되었다. 이는 보정되는 Schmidt 수의 값과도 연관관계를 가지는 것으로 나타났다. 특히 가는 유사의 경우에도 입자의 크기에 따라 다른 연직구조의 특성이 모의되었으며 이를 통해 수치실험의 경우에도 입자 크기의 고려 하에 매개변수의 보정이 이루어져야 한다는 점을 알 수 있다. 스토크스 수는 입자 반응 시간과 유체 난류 시간규모(Fluid Turbulence Ttime Scale)의 비율을 의미한다. 본 연구를 통해 스토크스 수가 유사의 확산강도 결정과 큰 상관 관계를 가지는 것을 알 수 있다. 이때 유사의 크기와 보정되는 Schmidt 수의 값은 고정되었다. 수치 계산시에 확산계수의 값이 부유 및 이에 따른 연직구조의 특성을 결정하는 중요한 변수라는 점을 고려할 때, 가는 유사의 부유를 모의할 때에는 세심한 주의가 요구된다는 점을 이해할 수 있다. 선행 연구사례를 통해 볼 때 부유하는 입자의 관성력이 Schmidt 수의 결정과 이에 따른 연직 구조의 계산에 큰 영향을 준다는 점을 알 수 있다. 본 연구에서는 스토크스 수를 관성력을 나타낼 수 있는 지표로서 계산하였지만 보다 정량적이고 효율적인 입자 관성력 지표가 제시될 때 효율적인 연구결과의 제시가 이루어질 수 있을 것으로 기대한다.

• Journal of the Korea Society of Computer and Information
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• v.28 no.10
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• pp.217-227
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• 2023

This study aims to stratify consumer market evaluation items from the Consumer Decision Journey(CDJ) perspective and understand the relationship between laws/systems and consumer orientation through the Korea Consumer Agency's '19 Korea Consumer Markets Evaluation Indicators. This study divided consumer market evaluation items into the selection comparison stage, selection decision stage, and post-purchase experience stage. And present a model that stratified the relationship with consumer orientation of laws/systems and verified using the CDJ model's experience as a control variable. Studies have shown that the relationship between the consumer market evaluation index that evaluates consumer orientation can be stratified according to the consumer decision-making stage and positively affects the relationship with consumer orientation of laws/systems. In addition, the impact of consumer market evaluation variables (reliability, and price) on the consumer orientation of laws/systems was different depending on the presence or absence of consumer damage experience.