• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.5D
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• pp.453-461
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• 2012

Life analysis is conducted for economic analysis of equipment or facilities. The purpose of life analysis is to predict future indicators for scrapping construction equipment, and establish and utilize a wide variety of business strategies according to data predictions. First, this study shows the methods to figure out average life, life expectancy and life prediction of construction equipment and the analysis of life making methods, using survival curves. Second, the study proposes and examines the life expectancy making model depending on revenues and expenses. The result of the study reveals that the economic life of the same equipment varies with expenses, revenues and the initial cost. The life expectancy making model for construction equipment reflects respective management status for equipment and will help efficient management for companies.

• Annual Conference on Human and Language Technology
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• 2011.10a
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• pp.133-135
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• 2011

본 논문은 다중 도메인 대화 시스템에서 사용자의 발화에 가장 적합한 도메인을 결정하는 방법에 관하여 논한다. 다중 도메인 대화 시스템 구축 시, 도메인의 확장성 재고 및 각 도메인 별 특성의 효과적인 적용을 위해, 각 도메인 별 단일 도메인 대화 전문가를 구축하고, 다수의 도메인 대화 전문가들을 통합함으로써, 다양한 도메인을 처리할 수 있는 대화 시스템을 구축할 수 있다. 이 때, 자연스러운 대화 처리를 위해서 주어진 사용자의 발화에 가장 적합한 도메인을 결정하는 기술이 필요하다. 본 논문에서는 사용자 발화의 의도 분석 결과 및 이전 사용자 발화 도메인 정보를 이용하는 구축된 분류 모델에 기반한 도메인 결정 방법을 제안하고, 실험 결과를 통해 제안된 방법의 효과를 검증한다.

• Journal of Korean Society of Transportation
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• v.19 no.6
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• pp.33-47
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• 2001

본 연구는 운전자가 음주 후 운전여부를 결정할 때 가장 중요하게 고려하는 음주운전결정요인에 대해 탐색하고, 이들 요인들에 대해 음주운전자와 비 음주운전자 간 차이를 보이는지를 알아보는 것을 목적으로 한다. 이를 위하여 본 연구에서는 집단심층면접과 기존 문헌 고찰을 통해 얻은 음주운전에 영향을 미치는 인지적·사회심리적 요인들을 종합하여 설문지를 작성하였다. 전체 조사대상자는 음주운전 경험이 있는 운전자 136(남자 122명, 여자 13명)명이었다. 연구결과를 살펴보면, 우선 운전자들은 음주 후 운전여부를 결정할 때 1) 음주정도, 2) 음주 후 경과시간 정도, 그리고 3) 다음날 이동시의 불편함, 4) 집과의 거리 정도를 가장 중요하게 고려하는 것으로 나타났다. 다음으로 음주 후 운전여부를 결정할 때 중요하게 고려하는 요인들에 대해 음주운전자와 비 음주운전자 간 차이를 검증해 본 결과, 크게 세 가지 차원에서 차이를 보이고 있다. 첫째, '잘못된 신념'에 해당하는 요인들로 음주운전자들이 비 음주운전자들에 비해 음주단속에 걸리지 않을 것이라는 신념을 가지고 있으며, 음주단속과 교통사고 발생가능성을 낮게 평가하고, 자신의 운전실력을 과신하는 경향이 있다. 둘째, '목전단기이익 추구 경향성'에 해당하는 요인들로 음주운전자들이 비 음주운전자들보다 음주 후 차를 두고 갈 경우 야기되는 비용부담, 다음날 이동시의 불편함 그리고 집과의 거리 정도에 더욱 민감한 것으로 나타났다. 마지막으로 음주운전자들이 비 음주운전자들보다 마신 술의 양(음주량)에 대해 더욱 과소평가하는 것으로 나타났다. 본 연구는 이와 같은 연구결과들을 바탕으로 향후 음주운전에 대한 개선 방안을 함께 제시하고자 한다.

• Journal of the Korea Institute of Building Construction
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• v.23 no.6
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• pp.851-862
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• 2023

This study introduces an objective and systematic framework for prioritizing buildings in the Gamyoung restoration project using a decision-support model. This model integrates evaluation criteria derived from a comprehensive literature review, refined through the Delphi method, and weights assigned via an Analytic Hierarchy Process(AHP) survey. Each building project is scored against these criteria to ascertain its priority for restoration, thereby facilitating informed decision-making for budget allocation in restoration projects. The effectiveness of the decision-support model was validated through a case study and expert consultations, demonstrating its practical utility in formulating concrete restoration project plans.

• Korean Journal of Construction Engineering and Management
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• v.10 no.5
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• pp.135-147
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• 2009

The world has witnessed the dramatic expansion of international construction markets during the last decades, particularly around the developing economies and energy resource-rich countries. However, despite the booming markets, the risks of emerging regions have also increased under the rapidly changing environments confronting the global contractors. Most of all, success in overseas business mainly depends on selecting the right market to enter. Accordingly, the right market selection requires global firms to carefully carry out the scientific market entry decision by evaluating country risks, market prospects, firm's capability, level of competition, and among others. This study aims at developing a market entry model by the use of real option analysis (ROA) and scenario planning, which addresses the corporate strategic flexibility against the uncertainties encompassing the overseas construction markets. Based on the suggested approach, global contractors are expected to make a better decision rather than a typically static approach in pursuing, postponing, or abandoning a prospective market to their capacity with a concurrent consideration of uncertainties as well as its option value.

• Korean Journal of Culture and Social Issue
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• v.14 no.1
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• pp.77-99
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• 2008

The purpose of this paper is to examine learning motivational process models, based on Self-Determination Theory(SDT) in academic settings. I examined if SDT's assumptions would fit for Korean adolescents, using a learning motivation scale(LMS), Basic Needs-autonomy, competence, and relatedness-Satisfaction Scale(BNSS), academic grades and life-quality scales, and also tried to search for the adequate motivational process models for Korean adolescents through regression analysis and structural equation model analysis. The results of this study are as follows. Basic needs satisfaction influences positively on the development of self-determinative motivation, which influences positively on academic achievement. But academic achievement and self-determinative motivation doesn't always influence on subjective well-being positively. And Korean adolescents who study autonomously or achieve good grades, are not better in a dimension of subjective well-being than others. Basic needs satisfaction while growing is more important than any other variables to improve adolescents' autonomous motivation, academic achievement and subjective life qualities.

• Journal of the Korean Society for information Management
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• v.25 no.4
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• pp.43-66
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• 2008

Currently be proceeded a lot of researchers for 'user information demand description' for interface of an information retrieval system or Web search engines, but user information demand description for a natural language form is a difficult situation. These reasons are as they cannot provide the semantic similarity that an information retrieval model can be completely satisfied with variety regarding an information demand expression and semantic relevance for user information description. Therefore, this study using the description logic that is a knowledge representation base of OWL and a vector model-based weight between concept, and to be able to satisfy variety regarding an information demand expression and semantic relevance proposes a decision way for perfect assistances of user information demand description. The experiment results by proposed method, semantic similarity of a polyseme and a synonym showed with excellent performance in decision.

• Journal of the International Relations & Interdisciplinary Education
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• v.4 no.2
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• pp.43-61
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• 2024

This study aims to present an 'integrated circular model' as a model to explain the phenomenon of curriculum autonomy applied to the school field after Korea's curriculum autonomy policy is determined. To this end, first, the significance of curriculum autonomy and the characteristics of curriculum autonomy in Korea were examined. Second, the necessity of an alternative curriculum policy-making model was discussed based on the critical analysis of the policy-making model. Third, the integrated circular model was explored. Here, the condition search for model establishment and the basic direction of the model were presented, and an integrated circular model was devised. The integrated circular model was divided into a macro model and a micro model, examined, and presented as an integrated model. As a result of the discussion, it was necessary to conceptualize the autonomy in which the self-requesting behavior of the curriculum to the state was promoted due to the autonomy granted by the state, and the exclusion and internal control of the curriculum were established. Through these discussions, suggestions such as generalization of model application, curriculum quality management, and supplementation through verification were made.

• Journal of the Korea institute for structural maintenance and inspection
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• v.22 no.1
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• pp.40-47
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• 2018

Porous walkway blocks are constructed for the purpose already, but reserved water is easily consumed due to the bigger permeability than necessary. Furthermore, porous structure reduces the strength of blocks, which resulting cracking and settlements in walkways. In this study, we suggested a solution for given problems by determination for the location of minimum principal stress in walkway blocks against moving foot loads in order to design and verifying the determined location of minimum principal stress. An optimum design with a verification example for determined location of minimum principal stress have been presented in a two dimensional Block member on elastic foundation for pedestrian walkway for reserving water inside. The minimum value for sum of shear forces is found when ${\times}1$ is 58.58 mm(30% of total span, 200mm), while the minimum deformation is located at ${\times}2=80mm$(70% of total span, 200 mm). In a modified model, When moving boundary condition(walkway foot loads) is located at ${\times}1$(=0 mm), the location of minimum principal stresses is found at 168 mm( 84% of span, 200 mm), in which the stress concentration due to the foot load is modeled as two layers of distributed loads(reactions of foundation modeled as springs). Consequently, zero deformed reservoirs for rainwater on the neutral axis (${\times}2=167mm$) has been determined in the modified model with three dimensional FEM analysis verifications.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.15 no.3
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• pp.45-50
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• 2001

Fuzzy theory is used to quantify some subjective criteria and consider uncertain factors for transmission line reinforcement planning in this paper. Sugeno's fuzzy integral is also used in the proposed method, because it can be easily allied to multi attribute decision making problems such as power system planning. To verify the proposed algorithm, some bode-neck lines are searched for the case that the amount of Maximal Load Supplying Capability(MLSC) is small using the results of contingency analysis for Korea Electric Power Corporation(KEPCO)'s 345[kV] transmission line in 1998. And several feasible alternatives are composed for line reinforcement which can dissolve the bottle-neck.