• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.33 no.11
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• pp.106-114
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• 2005

This study addresses space simulation test results and thermal modelling verification of HAUSAT-2 nanosatellite STM (Structural-Thermal Model). The thermal modelling of the HAUSAT-2 has been modified in accordance with test results. Thermal analysis results were repeatedly compared with test results for modified thermal modelling. It is verified that the analysis results for modified thermal modelling agree well with test results. Some surface heaters were implemented to simulate solar illumination for HAUSAT-2 Thermal Vacuum/Balance Test. A low-cost and effective thermal test methodology, which is applicable to ultra-small satellite system, was proposed and verified by test results in this study.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.27 no.6
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• pp.589-596
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• 2014

Joints, fasteners or connected parts frequently have a significant effect on the dynamical behavior of assembled mechanical structures. Therefore, the analytical prediction of structural responses depends on the accuracy of joint modeling. This paper deals with the formulation and analysis of dynamic mechanism for joint flexibilities whose relevant magnitudes of stiffnesses are investigated by using linear and torsional springs. The equation of motion is derived by using a generic joint in the middle of clamped-clamped beam. A reanalysis due to changes in magnitudes of joint stiffnesses is based on the reduced analysis where the binomial series terms are used as basis vectors. The solution procedures are straightforward and the method can be readily used with a general finite element method. The computational effort needed by this approach is usually much smaller than the effort needed for complete vibration analysis. Two numerical examples show that accurate results are obtained efficiently by reducing the number of degree in the reduced model.

• Korean small business review
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• v.41 no.1
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• pp.97-129
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• 2019

The concepts of entrepreneurship are very various. So many researchers are confused or not sure of the concepts of entrepreneurship. Some entrepreneurship researches has defined the entrepreneurship as 'self-employment. This study try to set a comprehensive conceptual model of concepts of entrepreneurship through classification of word and phrase with job analysis and competence model. Several concepts of entrepreneurship which important prior researchers, had defined are analysed into 'subject', 'object', 'verb', 'goal and behavioral results' with content analysis. Also, Several concepts of entrepreneur which important prior researchers had defined, are analysed into 'individual psychological traits', 'competence and ability', 'motive', and 'function or job (business).' This study suggests a integrated conceptual model of entrepreneurship based on analysed results.

• Proceedings of the KIEE Conference
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• 2006.07a
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• pp.306-308
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• 2006

현대 과학 기술은 개개의 분야의 고유성과 특성이 점차 모호해지고 여타 분야와의 접목 내지는 응용의 발판을 넓혀 점차 실용화하는 추세이다. 특히 경제성과 밀접한 관련이 있는 엔지니어링 분야가 더욱 그러하다. 일상생활에서 사용되는 컴퓨터의 진보는 그간 학문적인 연구에 소요되었던 시간을 단축시켰으며 연산가능 범위를 확대하였고 이것을 바탕으로 우리는 좀더 세밀하고 정확한 진단과 예측이 가능해졌다. 이는 엔지니어들이 갖추어야할 지식체계에도 영향을 주어 과거 배타적이며 폐쇄적인 업무성향을 개방적이고 공유 가능한 대상으로 변모가능하게 되었다는 점에서 의의가 크다. 특히 정보 전달의 측면에서 보면 최근 부각되고 있는 그래픽적 요소를 가미한 해석프로그램을 주목해야만 한다. 일반적인 데이터 나열이나 조작 시에 사용되던 텍스트 기법이 다이얼로그 상자를 통해 좀더 인터렉티브한 환경으로 바뀌었고 현재는 이러한 내용을 그래픽적인 환경으로 재해석하고자 하고 있다. 바로 이러한 노력의 일환으로 본 논문 역시 그래픽 시뮬레이터 개발에 관해 다루게 되었다. 본 논문에서는 그래픽이란 주제를 좀더 심층적으로 다루어 사용자 정의 타입의 단계까지 논함으로써 앞으로 나아가야 할 방향을 제시해 보고자 한다.

• Journal of Broadcast Engineering
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• v.27 no.5
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• pp.676-684
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• 2022

In this paper, we consider the potential of a metaverse space that can be expanded infinitely through the reinvention of the metaverse space. In particular, this study attempted to establish a new concept of metaverse space, and to present research models and strategies between technologies and humanities. To perform this, this study revealed problems that can be overlooked through characteristic analysis of the metaverse space and proposed ways to overcome them through in-depth interviews with experts. In this way, interdisciplinary research will contribute to the revitalization of the metaverse content industry in the mid to long term. Therefore, through this study, it is expected that reinterpreted metaverse space can reach a practical realization as a meaningful place of life and a creative space through Yi-Fu Tuan's concept.

• Asia Marketing Journal
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• v.2 no.1
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• pp.65-82
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• 2000

McCarthy(1960) 이후 오랫동안 4P 스키마타에 대한 논의가 없다시피하다가 Waterschoot and Van den Bulte(1992)가 특히 촉진믹스에 문제가 많음을 지적함으로써 마케팅믹스 분류체계에 대한 논의가 다시 시작되었다. 하지만 이들 논의 내용 또한 '4P 스키마타'를 재해석하는 정도이지 이를 넘어서지는 못하고 있다. 필자들은 4P 스키마타의 한계점을 Hunt(1983, 1991)의 스키마타 평가기준에 따라 크게 네 가지로 지적한다. 먼저 분류대상의 속성이나 특징이 명확하지 않고, 다음으로 실무의 흐름을 제대로 반영하지 못하여 유용성에 문제가 있으며, 세 번째로 분류된 범주간에 배타성과 포괄성이 부족하다. 끝으로 4P 간에 순서나 위계가 없어 문제의 진단이나 투자의 효율성을 논의하기가 어렵다. 이런 점들을 고려하여 연구자들은 4P를 원점활동과 접점활동으로 나누고 Parasuraman, Zeithaml, and Berry(1985; 1988 a,b; 1994)의 갭 모델을 원용하여 마케팅믹스의 새로운 분류체계인 '갭 스키마타'를 제안한다. 접 스키마타는 고객 갭과 마케터 갭 1, 2, 3, 4로 구성된다. 고객 갭이란 고객의 기대와 지각간의 차이 즉, 고객만족을 뜻하고 갭 1이란 마케팅조사를, 갭 2, 3은 원점활동을, 갭 4는 접점활동을 지칭하다. 원점활동인 갭 2란 상품기획, 브랜딩, 가격책정으로 구성되며; 갭 3은 광고 및 판촉으로 구성되고; 집 4는 유통 및 물류, 인적판매내지는 영업, 고객서비스로 구성된다.

• New & Renewable Energy
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• v.20 no.1
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• pp.95-101
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• 2024

Since 1990, the Renewable Big Data Research Lab at the Korea Institute of Energy Technology has been observing solar radiation at 16 sites across South Korea. Serving as the National Reference Standard Data Center for Renewable Energy since 2012, it produces essential data for the sector. By 2020, it standardized meteorological year data from 22 sites. Despite user demand for data from approximately 260 sites, equivalent to South Korea's municipalities, this need exceeds the capability of measurement-based data. In response, our team developed a method to derive solar radiation data from satellite images, covering South Korea in 400,000 grids of 500 m × 500 m each. Utilizing satellite-derived data and ERA5-Land reanalysis data from the European Centre for Medium-Range Weather Forecasts (ECMWF), we produced standard meteorological year data for 1,000 sites. Our research also focused on data measurement traceability and uncertainty estimation, ensuring the reliability of our model data and the traceability of existing measurement-based data.

• Journal of Educational Research in Mathematics
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• v.23 no.2
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• pp.95-116
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• 2013

Though the term "mathematical modeling" has no single definition or perspective, it is pursued commonly by groups from various perspectives who emphasize the activities of understanding and representing real phenomenon mathematically, building models to solve problems, and reinterpreting real phenomenon to make an attempt to understand the real world and related mathematical models more deeply. The purpose of this study is to identify how mathematization arises and find difficulties of mathematization in mathematical modeling process that share common features with the mathematical modeling activities as presented here. As a result of this research, we confirmed that the students mathematized real phenomena by building various representations, and interpreting them with regard to relationships and contexts inherent real phenomena. The students' communication fostered interplay between iconic representations and indexical representations. We also identified difficulties of mathematization in mathematical modeling process.

• Journal of the Korean association of regional geographers
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• v.20 no.1
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• pp.70-91
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• 2014

There have been a lot of efforts to adapt climate change around the world, and Korea is no exception. The low carbon green cities for overseas have had many different forms through their own special models and strategies. Korea needs a model and strategy of Korean low carbon green city, which is suitable for Korea climate and topography. This study pays attention to the Pungsu, which is Korean traditional thinking system for space, and examines the way for selecting locations and space planning to create the Korean low carbon green city through the contemporary interpretation of the Pungsu. For this purpose, first of all, this study makes efforts for the contemporary interpretation of the past Pungsu theory from the modern city's perspective, through understanding the difference between the Korea's historic villages(cities) and the modern cities. Based on the contemporary interpretation of the Pungsu theory, this study finds ways of application the system on selecting locations and space planning in the Pungsu theory to create the Korean low carbon green city.

• Journal of Industrial Convergence
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• v.19 no.6
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• pp.177-186
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• 2021

This review aims to propose a model that can reinterpret the abnormal and functional connections between cognitive processes and emotional regulations based on the neurocognitive networks for a comprehensive understanding of pathologic processes and treatment approach of depression and anxiety disorder. Through the processes of rebuilding the network model for depression and anxiety disorder, it was confirmed that depression can be said to be 'over-immersion in self-referencing' due to hyper-activation of default mode network (DMN), and anxiety disorders to be 'disconnection with self-referencing' due to hypo-activation of DMN. The attempts to link up between abnormal activation and pathological function of DMN which is thought to be involved in self-referential processing associated with self-consciousness and projection among neurocognitive networks may be another starting point that can afford to be suggestive in integrated interpretation and therapeutic approach to depression and anxiety disorder.