• 한국디지털정책학회:학술대회논문집
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• 한국디지털정책학회 2007년도 춘계학술대회
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• pp.377-384
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• 2007

This paper is about how to establish the strategic teaming organization in digital age. Through the case study of action teaming, this research can give some implications to small-sized organizations who want to establish teaming culture and positive activities in their own companies. The case site was S-steel, which belongs to the steel industry. To improve and drive teaming activities, I made use of skills: action learning, fishbone analysis, creative thinking, brainstorming, creative discussion skill, and organization diagnostic method.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 춘계학술대회 논문집 에너지변화시스템부문
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• pp.180-182
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• 2009

As a train control system becomes a large scale and complex, it is necessary to control rigorously the system requirements specification of the train control system at the early phase. This paper describes Use Cases and activity diagrams of ATS functions requirements in the train control system. Basic functions of the train control system refers to IEC 62290-land are suggested. And the basic functions includes train operation without a driver. It is anticipated that this paper will be helpful for the analysis of ATS functions, ATO functions and EI function in the train control system.

• 한국가정과교육학회지
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• 제23권2호
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• pp.71-87
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• 2011

본 연구에서는 성별, 학교급별, 계열별로 청소년의 인터넷 과다 사용에 영향을 미치는 개인, 부모 및 가족관련 변인을 파악하였다. 창원시 소재 청소년들을 대상으로 설문조사를 실시하여 총 480부가 분석에 사용되었다. 자료분석 방법으로는 중다회귀 분석을 사용하였다. 연구결과는 다음과 같다. 1. 남학생 집단은 채팅과 온라인 게임을 많이 할수록, 자기통제력이 적을수록, 스트레스를 많이 받을수록 인터넷 사용이 많았고, 여학생 집단은 온라인 게임과 음란물 또는 성인관련 사이트를 많이 접할수록 인터넷 사용이 많았다. 2 중학생 집단은 온라인 게임과 프로그램 및 MP3파일 다운로드를 많이 할수록, 자가통제력과 부모의 규칙설정이 적을수록 인터넷 사용이 많았고, 고등학생 집단은 전자우편을 적게 사용할수록, 온라인 게임과 동호회/클럽활동을 많이 할수록, 자기통제력이 적을수록, 부의 인터넷 사용능력이 높을수록, 부모의 감독통제가 많을수록 인터넷 사용이 많았다. 3 인문계 고등학생 집단은 친한 친구 수가 적을수록, 전자우편을 적게 사용할수록, 온라인 게임과 동호회/클럽활동을 많이 할수록, 음란물 또는 성인관련 사이트를 많이 접할수록, 자기통제력과 모의 인터넷 사용능력이 적을수록 인터넷 사용이 많았고, 실업계 고등학생 집단은 학교성적이 높을수록, 온라인 게임을 많이 할수록, 자기통제력이 적을수록, 스트레스를 많이 받을수록, 부의 인터넷 사용능력과 부모의 감독통제가 높을수록 인터넷 사용이 많아지는 것으로 나타났다.

• 정보과학회 논문지
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• 제44권3호
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• pp.261-274
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• 2017

가변성 관리는 시스템이 어느 정도까지의 복잡성을 처리할 수 있는가를 정의하는 가장 중요한 기준이다. 대부분의 요구 공학 연구에서는 시스템이 동작하는 환경에 대해 많은 부분을 간과하거나 추측하는 수준에 그치고 있다. 그러나 실시간 시스템에서는 본질적으로 변화하는 컨텍스트를 관찰하고 조정하는 것은 중요한 요소이다. 본 연구에서는 i* 목표 모델, 문제 프레임, 유즈 케이스 맵, 라이브 시퀀스 차트를 활용하여 다양한 컨텍스트에 적합한 요구사항을 식별할 수 있는 프레임워크를 제안하며 스마트 그리드의 실시간 가격 정책 변화 시스템을 사례 연구로 활용하여 제안하는 프레임워크를 단계별로 자세하게 설명한다. 사례 연구를 통해 제안방법에서 유즈 케이스 맵과 라이브 시퀀스 차트를 활용한 시나리오 정교화 과정이 초기 컨텍스트 분석 및 검증에 도움을 주는 것을 보여주며 장애물 및 충돌 분석을 위한 요구사항을 정교화함으로써 요구공학 엔지니어들이 시스템의 건장성을 증가시키는 것을 도와줄 수 있음을 증명한다. 이처럼 제안하는 프레임워크는 이론적인 방법과 실증적인 사례를 통해 평가된다.

• 한국건축친환경설비학회 논문집
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• 제12권6호
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• pp.627-640
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• 2018

Submetering electricity consumption data enables more detail input of end use components, such as lighting, plug, HVAC, and occupancy in building energy modeling. However, such an modeling efforts and results are rarely tried and published in terms of the estimation accuracy of electricity demand. In this research, actual submetering data obtained from a university building is analyzed and provided for building energy modeling practice. As alternative modeling cases, conventional modeling method (Case-1), using reference schedule per building usage, and main metering data based modeling method (Case-2) are established. Detail efforts are added to derive prototypical schedules from the metered data by introducing variability index. The simulation results revealed that Case-1 showed the largest error as we can expect. And Case-2 showed comparative error relative to Case-3 in terms of total electricity estimation. But Case-2 showed about two times larger error in CV (RMSE) in lighting energy demand due to lack of End Use consumption information.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.559-563
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• 2015

Identification of energy use patterns in buildings has a great opportunity for energy saving. To find what energy use patterns exist, clustering analysis has been commonly used such as K-means and hierarchical clustering method. In case of high dimensional data such as energy use time-series, data reduction should be considered to avoid the curse of dimensionality. Principle Component Analysis, Autocorrelation Function, Discrete Fourier Transform and Discrete Wavelet Transform have been widely used to map the original data into the lower dimensional spaces. However, there still remains an ongoing issue since the performance of clustering analysis is dependent on data type, purpose and application. Therefore, we need to understand which data reduction techniques are suitable for energy use management. This research aims find the best clustering method using energy use data obtained from Seoul National University campus. The results of this research show that most experiments with data reduction techniques have a better performance. Also, the results obtained helps facility managers optimally control energy systems such as HVAC to reduce energy use in buildings.

• 한국항행학회논문지
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• 제14권6호
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• pp.900-908
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• 2010

최근 소프트웨어 개발에 적용하기 시작한 객체지향 방법(OOM:Object-Oriented Method)은 독립적인 소프트웨어의 재사용을 통한 개발 비용과 시간의 단축을 강조하고 있다. 그러나 개발 기술에 대한 지식 부족과 확장성 및 성능을 배제한 설계로 많은 문제점이 나타나고 있다. 따라서 본 논문에서는 소프트웨어 개발 생명주기에서 소프트웨어 생산성 향상을 위한 효율적인 객체지향 모델링 방법을 제안하고자 한다. 제안 방법은 Use Case 모델링, 분석 모델링, 그리고 설계 모델링 방법들을 포함하고 있다.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.464-471
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• 2009

Robot and application of IT skill of construction industry are slow comparatively than another thing industry by the feature. This research proposes progress management and real time information gathering through construction automation and RFID focused on steel structure construction. Building for RTPM system, must consider various variables and surrounding situation in construction field and it is the most important and difficult matter that draw right requirement and grasp relation between this requirements to accomplish one suitable task considering these environment. Therefore, in this study analyzes requirement and target for RTPM system based on scenario that is easy to draw requirement and apply this to use case model. Presented method suggests that represent relation between goals and way that refines goal systematically from requirement of RTPM system. And it could express for visualization through the Way that attaches nonfunctional elements of system with system internal goal.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제26권2호
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• pp.63-82
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• 2023

In the context of Korean educational research, the number of qualitative research studies has gradually increased since 2000. It has become one of the most important research methods today. The field of math education is no exception to this trend, and qualitative approaches are now becoming one of the main research methods. This increase in qualitative research has contributed to the provision of detailed information about educational practice, but at the same time, the overall level of credibility in the results of qualitative research seems to be lower than that of quantitative research. This study started with the problem consciousness that the number of qualitative studies is increasing in the field of mathematical education, but there is a lack of discussion on the methodology of applying qualitative research methods. In this study, among the papers published in the journal related to mathematical education, papers using a qualitative approach are analyzed focusing on cross-case analysis. Based on the analysis results, the tendency to use qualitative approaches is diagnosed, ways of improving the validity and trustworthiness of qualitative research results in the field of mathematical education are examined, and implications and suggestions are presented.

• Asian Pacific Journal of Cancer Prevention
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• 제14권5호
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• pp.3299-3304
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• 2013

Background: The Global Adult Tobacco Survey has 15 key indicators, cigarettes smoked per day (CPD) among daily smokers being one of them. The first wave of GATS in 14 countries indicated that mean CPD use is higher in women than men in India only, which is contrary to the current understanding of tobacco use globally. This study was undertaken to understand the unusual findings for mean CPD use in the GATS-India survey. Materials and Methods: Items B06a and B06b of the GATS India survey questionnaire that collected information on daily consumption of manufactured and rolled cigarettes were analyzed using SPSS software. Exclusive users were identified from these items after excluding the concurrent users of other tobacco products. Cigarette type, exclusive use and gender stratified analyses were made. Consumption of different types of cigarettes among the mixed users of manufactured and rolled cigarettes were correlated. Results: Higher mean number of CPD use among male daily-smokers was observed than their female counterparts in product specific analysis. Mean CPD as per GATS cigarette definition was higher in males than females for exclusive users but a reverse trend was observed in case of non-exclusive users. Use of manufactured cigarettes increased with increase in use of rolled cigarette among the mixed users and around half of these users reported equal CPD frequency for the both types of cigarettes. Conclusions: The anomaly in mean CPD estimate in GATS-India data was due to inclusion of two heterogeneous products to define cigarettes, variation in cigarette product specific user proportions contributing to the average and non-exclusive concurrent use of other tobacco products. The consumption pattern of cigarettes among the mixed users highlights bias in CPD reporting. Definition, analysis and interpretation of 'cigarettes per day' in the GATS India survey need to be improved by redefining cigarettes and making product specific analyses.