• 한국환경과학회지
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• 제25권3호
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• pp.457-464
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• 2016

The most wind farm development process in Korea still have not been defined since the history of the wind farm development experiences are very short compared to EU and other developed countries. Therefore, most wind farm development company and researchers have a lot of trouble to implement the wind farm development and need a guideline for the process. Establishing the wind farm needs a complex processes such as transportation system, construction conditions, natural environment and wind conditions etc. Specially, for the restricted development area, the social negotiation and legal minds are necessary. In the case, the decision making process of suitable wind farm area using GIS tool is very useful. However, before using GIS technique, we should understand the development processes and the items for surveying tools. Recently, suitability analysis of selecting Onshore Wind Farm has been studied to consider exclusion analysis to solve the limited develop condition problem. This paper proposed the onshore wind farm development process which can suitable to Korea wind farm environment based on European guideline with GIS tool. To estimate the processes, the processes are divided into two parts, the basic design and wind farm planning. Next, the planning stages are classified into five stages in which the factors for each step were considered.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 춘계학술대회 논문집
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• pp.27-33
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• 2005

Constant load model is generally used for an electric train to perform the static analysis of AT feeding systems. In this model, the train will be considered as a constant load model when it drives or as a constant source model when it applies regenerative brake. However there must be some voltage constraints on the catenary in actual operations. These constraints are established for the reason of protecting the feeding facilities from excessive rise of regenerative braking voltage or guaranteeing the minimum traction power of train. In normal operating situation, the pantagraph voltage of the train should be maintained within these limits. Keeping these facts in minds, we suggest new methods of analyzing AT feeding systems using the constant power models with the conditions of voltage constraints. The simulation results from a sample system using the proposed method illustrate both the states of system variables and the supply-demand relation of power among the trains and the systems very clearly, so it is believed that the proposed method yields more accurate results than conventional methods do. The proposed methods are believed to contribute to the assessment of TCR-TSC for compensating reactive powers too.

• 한국철도학회논문집
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• 제9권6호
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• pp.652-656
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• 2006

Constant load model is widely used for an electric train to perform the static analysis of AT (Auto Transformer) feeding systems. In this model, the train will be considered as a constant load model when it drives or as a constant source model when it applies regenerative brake. However there must be some constraints imposed on the pantagraph voltage in actual operations. These constraints are established for the reason of protecting the feeding facilities from excessive rise of regenerative braking voltage or guaranteeing the minimum traction power of train. In normal operating situation, the pantagraph voltage of the train should be maintained within these limits. Keeping these facts in minds, we suggest new methods or analyzing AT feeding systems using the constant power models with the conditions of voltage constraints. The simulation results from a sample system using the proposed method illustrate both the states of system variables and the supply-demand relation of power among the trains and the systems very clearly, so it is believed that the proposed method yields more accurate results than conventional methods do. The proposed methods are believed to contribute to the assessment of TCR-TSC for compensating reactive powers too.

• 한국환경교육학회지:환경교육
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• 제25권2호
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• pp.161-179
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• 2012

The aims of this study are to investigate the environmental perception of elementary school students through picture drawing and associated words about environment, and analyze whether there are differences in the environmental perception according to living places and grades. The drawing of 230 students are analysed and categorized into the criteria. The results are as follows: a number of students realized as images associated with natural environment for words related to environment. In the pictures of the 'positive environment', expression frequencies of natural environment and living things were higher than ones of artificial environment and non-living things. On the other hand, there were many pictures expressed as pollutions of waste, air and water in the pictures of the 'negative environment'. Comparison of environmental perception between rural and urban students showed a significant difference all in the two criteria. There was, however, no difference in the environmental perception between grades. Therefore, it is suggested that student's minds about the sentimental situation can be studied and they can be guided in positive directions to lead their future life in environment-friendly education rather than pollution education.

• 문화기술의 융합
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• 제1권4호
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• pp.107-111
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• 2015

인간은 잠을 자는 동안에 지친 몸과 마음을 회복한다. 밥을 먹는 것만큼이나 수면은 당연한 일이지만 잠을 자지 못해 병원을 찾는 사람들이 많다. 최근에 보급되는 거의 모든 스마트폰에는 가속도센서를 포함하여 다양한 센서를 탑재함에 따라 U-헬스케어 서비스 분야에서 환자 또는 의료진에게 스마트폰 기반의 의료용 애플리케이션을 제공하기 위한 많은 연구가 진행되고 있다. 본 논문에서는 가장 대중화된 스마트폰에 내장되어 있는 각종 센서들을 사용하여 사용자의 행동을 인식하여 정상적인 수면흐름을 유도할 수 있도록 안드로이드 기반의 애플리케이션을 제공하는 목적이다.

• 대한수학교육학회지:학교수학
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• 제11권1호
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• pp.187-206
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• 2009

언어로서의 수학의 역할을 생각해 보고 수학에서의 읽기의 가치를 고찰한다. 문학작품을 수학학습에 접목시키는 것이 어떤 의미를 가지며, 문학 작품을 어떤 관점에서 선정할 것인지를 살펴보고, 문학 작품을 수학 수업에 방안을 고안하여 활용해 봄으로써 그 효과와 시사점을 찾아보았다. 문학 작품은 학생들에게 동기를 부여하고, 흥미를 불러 일으켰다. 또한 문학 작품을 수학 수업에서 접하게 됨으로써, 수학적 아이디어를 그들의 개인적인 경험에 관련시킬 수 있으며 수학이 인간 정신 활동의 자연스러운 표현임을 깨닫게 하고, 문제 해결을 위해 수학을 사용하기 위한 맥락을 제공함으로써 확장된 사고를 할 수 있는 이점을 가지고 있음을 밝혔다.

• 한국환경교육학회지:환경교육
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• 제23권2호
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• pp.32-45
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• 2010

The purpose of the present study is to develop ecological experience learning program for the wetland so that elementary school students can recognize the significance and values of wetland and have the attitudes to protect it through their ecological experience learning, and investigate changes in elementary school students' perception for wetland. The experimental class was composed of 26 elementary school students and took the ecological experience learning. The comparison class was also composed of 26 students who took theoretical learning for wetland. It was found that knowledge and attitudes for wetland of the experimental class were significantly high not only in the knowledge area but also in the affective area than those of the comparison class. And it was found that interest and curiosity into wetland were elevated also in the results of the qualitative evaluation, suggesting that we could get the effect of ecological experience learning. Therefore, it is thought that above all, more experience learning programs for wetland are needed to develop for elementary school students' right view of nature and minds to love it by continuously finding and providing materials of experience learning like those of this research in the future.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제25권4호
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• pp.296-311
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• 2021

Topological Data Analysis (TDA), a relatively new field of data analysis, has proved very useful in a variety of applications. The main persistence tool from TDA is persistent homology in which data structure is examined at many scales. Representations of persistent homology include persistence barcodes and persistence diagrams, both of which are not straightforward to reconcile with traditional machine learning algorithms as they are sets of intervals or multisets. The problem of faithfully representing barcodes and persistent diagrams has been pursued along two main avenues: kernel methods and vectorizations. One vectorization is the Betti sequence, or Betti curve, derived from the persistence barcode. While the Betti sequence has been used in classification problems in various applications, to our knowledge, the stability of the sequence has never before been discussed. In this paper we show that the Betti sequence is unstable under the 1-Wasserstein metric with regards to small perturbations in the barcode from which it is calculated. In addition, we propose a novel stabilized version of the Betti sequence based on the Gaussian smoothing seen in the Stable Persistence Bag of Words for persistent homology. We then introduce the normalized cumulative Betti sequence and provide numerical examples that support the main statement of the paper.

• 철학연구
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• 제105권
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• pp.193-214
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• 2008

이 논문은 메를로-퐁티의 지각 이론에서 출발하여 살의 개념을 체계적으로 분석하고 살의 관점에서 타자 문제를 어떻게 다루는가를 연구한다. 먼저, 메를로-퐁티가 철학적 주제로 삼고 있는 것이 무엇인가를 살펴본다. 철학적 물음은 세계와 이성의 신비를 푸는 문제로서, 이 문제가 반성적 분석의 대상일 수 없음을 밝힌다. 반성보다 선행하는 것이 지각이며 이 지각이 보통 사람들이 말하고 이해하는 지각이 아님을 보여준다. 메를로-퐁티의 현상학적 철학은 지각된 세계의 본연의 모습을 기술하는 것이 그 본질 목적이나, 사람들은 객관적 태도와 객관주의적 사고방식에 젖어 지각된 세계를 표상적으로만 이해하고 있다. 지각의 본성을 있는 그대로 기술함으로써 그 구조가 가역성에 있음을 규명한다. 지각의 가역성을 거쳐 살의 가역성에 이르고 살로써 타자 문제를 해결할 수 있는 한 가지 대안적 입장을 제시한다.

• 유통과학연구
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• 제20권7호
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• pp.87-95
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• 2022

Purpose: This study aims to analyze the effects of Brand Coolness, Brand Love, and Self-brand Connections on Word-of-mouth positively. The retail format of Starbuck in Vietnam is successful in distribution applied when it becomes the place for customers to express themselves. Consumers are now aware about Brand Coolness of the Starbucks developed in Vietnam then turn to love the brand of store and connect themselves to the brand. In this study, the closest relationship to form the basis for consumer Word-of-mouth about a brand is the relationship between Brand Coolness and Brand Love. Results: The findings show that Brand Coolness and Brand Love are important value factors in customers' minds toward their behavior, form there, it will contribute to the brand store in distribution. Research design, data and methodology: This article used the quantitative technique utilizing PLS-SEM software to test the hypothesis with 600 samples. The data obtained shows that people have Word-of-mouth about the retail format of Starbucks in Ho Chi Minh City. Conclusion: The study has demonstrated the conclusions and proposed solutions to help beverage brands build Brand Love, thereby achieving coolness, connecting brands with themselves, leading to customer Word-of-mouth in a positive way towards retail format.