• Journal of the Korean Association of Geographic Information Studies
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• v.4 no.3
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• pp.1-12
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• 2001

This thesis represents the integrated 3D DEM using both the process of satellite image and the real value of topographic maps. This DEM is draped on satellite image processed to improve representations of the real world. The 3D visualization and 3D animation with satellite imagery data enables to depict more vivid and realistic world. The paper also describes and implements the natural environmental/ecological information system that consists of 7 modules to manage environmental data systematically through an enhanced user interface. We make use of topographic map, satellite imagery data and several thematic maps. Each module has a user interface enabling to assist particular needs of decision-making for ecological/environmental assessments associated with spatial analysis of ecosystem and classification of the environmental status quo and other purposes.

• Journal of the Korean Society of Earth Science Education
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• v.15 no.1
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• pp.76-90
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• 2022

In this study, after applying the argument structure class design program for 20 preservice earth science teachers, we conducted individual in-depth interviews, analyzed the data, and derived a scientific argumentation PCK development model. The scientific argumentation PCK development model consists of three dimensions: Scientific argumentation PCK, PCK ecosystem, and reflective practice. Scientific argumentation PCK is demonstrated in the process of designing or executing classes using argumentation structures as an instructional reasoning tool. PCK ecosystem, consisting of the existing conventional PCK components, is a dimension surrounding the scientific argumentation PCK, and these two dimensions develop by interacting with each other. Reflective practice regulates each dimension and develops it in various ways by mediating the two dimensions of the scientific argumentation PCK and the PCK ecosystem. The conclusions drawn based on the results are as follows: First, preservice science teachers can demonstrate scientific argumentation PCK in the process of design and implementation of lessons using argumentation structures as a pedagogical reasoning tool. Second, it is necessary to develop the PCK for pedagogical reasoning tools such as scientific argumentation PCK in advance for the development of science teachers' PCK, since the scientific argumentation PCK can develop various components of the PCK ecosystem. Finally, it is necessary to use scientific argumentation PCK to support the preservice teacher's reflective practice, seeing that the scientific argumentation PCK promotes the development of PCK ecosystem components by inducing reflective practice.

• Proceedings of the Korea Contents Association Conference
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• 2011.05a
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• pp.291-292
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• 2011

우리나라 뿐만 아니라 미국 해양에서도 기름 유출사고가 발생하여 많은 생태계 피해가 있었으며, 앞으로도 발생할 가능성이 크다. 해수유동예측모델 실행 웹 포털은 기름 유출과 같은 해양사고에 빠르게 대응하기 위해 고안되었다. 한국과학기술정보연구원에서 제공하는 그리드 자원을 이용하여 신속한 관측자료 수집 및 입력자료 생성으로 해수흐름을 빠르고 정확하게 예측하기 위해 개발되었으며, 사고 발생 시 해수유동예측으로 오염물질의 경로 예측과 생태계 피해를 최소화하는데 기여하고자한다.

• Electronics and Telecommunications Trends
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• v.36 no.4
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• pp.81-91
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• 2021

Recently, discussions on Metaverse, which represents the transcendent world, have been dominant for some time. Cases related to the Metaverse are introduced through various media and are continuously attracting attention as the next generation of the Internet. This study reviews the business model and the ecosystem overview, focusing on service cases related to the Metaverse. The widely used business models include content production and sales, media brokerage fee, and marketing fee. The Metaverse ecosystem is formed around games, with major players in game production, authoring tool & support SW, intelligent cloud service, and game platform expected to lead the market. Results show that a strategy to secure the leadership of the Metaverse, such as the business model expansion conditions, a strategy to foster a game-oriented Metaverse ecosystem, and technology development for the realization of the ultra-realistic Metaverse, is necessary.

• Annual Conference of KIPS
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• 2009.11a
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• pp.841-842
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• 2009

어플리케이션에 대해 사용한 후 비용을 지불하는 use first, pay later 서비스 개념의 SaaS의 구현 성숙도 모델이 Microsoft 사, Dharmesh Shah, Forrester 사에서 정리되어 발표되었다. 하지만 기존의 SaaS 성숙도 모델은 SaaS 생태계에 존재하는 이해당사자들의 관점 중 서비스 제공자의 관점만 반영되어 SaaS 어플리케이션 사용자, 개발자, 테넌트 관리자의 측면에서 고려된 기술 성숙 방향이 반영되어 있지 않다. 본 논문은 SaaS 기본 이론과 업계 제품에서 조사된 이론에 입각해 SaaS 생태계 전반의 SaaS 이해당사자들 관점에서 SaaS 플랫폼 역량의 발전을 분류할 수 있는 체계를 아키텍처에 기반하여 제시하고자 한다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.20 no.5
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• pp.511-525
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• 2014

Goal of this study is estimating of validity of calculated vertical diffusion coefficient for Masan bay is semi-enclosed bay by using eco-hydrodynamic model that is used to analysis of physical structure of coastal waters and calculates the vertical diffusion coefficient. physical structure of coastal waters is calculated by EFDC model, vertical diffusion coefficient calculated as the density gradient is bigger, the vertical diffusion coefficient as density gradient is increases, the vertical diffusion coefficient is decreased. Validity of vertical diffusion coefficient estimated by reproducibility of concentration of dissolved oxygen that calculated in ecosystem model is constructed by Stella program. The Results of model in 2008~2009 were $R^2$ value of 2008 is 0.529~0.700 and $R^2$ value is 0.542~0.791. This results were similar to observed data and simulated to hypoxia at that time. The 'vertical diffusion coefficient' represents stratification and physical stable of a water body, and will be useful for prediction of Hypoxia outbreak.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.198-202
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• 2011

과거의 하천은 이 치수에 주목적을 두고 하천정비를 실시하였으며, 이 때문에 하천은 직선화되거나 하천구조물을 설치하여 원래의 고유한 특성을 상실한 채 자연적인 모습을 찾아보기 어려운 상황에 이르렀다. 과거와 같은 하천의 난개발은 하천 생태계를 교란하였으며, 하천을 서식처로 삼고 살아가던 많은 동식물이 하천환경의 변화와 파괴로 인해 사라졌거나 생존을 위협받고 있다. 그러나, 최근에는 이러한 하천환경을 과거와 같이 생물의 종다양성이 풍부한 곳으로 만들기 위한 노력이 하천 개발과정에서 다양하게 전개되고 있으며, 이를 위한 연구도 진행되고 있다. 본 연구에서는 하천환경에서 어류의 서식처 보전을 위한 하천유지유량을 산정하기 위해 2차원 생태모델인 River2D 모형을 섬진강 송정지점을 대상으로 하여 적용하였다. 모형의 적용을 위해 송정지점에서의 대표어종을 선정하였으며, 서식처 특성 파악을 위해 하천 수리 및 하도특성을 조사하였다. 조사된 결과를 이용하여 River2D 모형을 구축하였으며, 구축된 모형을 이용하여 송정구간에서 대표어종인 피라미와 갈겨니의 서식처 보전을 위한 생태학적 하천유지유량을 추정하였다. 생태학적 하천유지유량은 모델의 결과와 실제 도입 가능수량 등을 검토하여 최종적인 하천유지를 결정하였으며, 그 결과 송정구간은 $7.0\;m^3/s$이상으로 산정되었다. 본 연구에서는 미시서식처 모형에 의해 생태유지유량을 산정하였으나, 진정한 의미의 생태학적하천유지유량은 수리수문학적 특성뿐만 아니라 생화학적 특성을 고려한 거식적인 관점에서 검토하여야 할 것이다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.24 no.1
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• pp.101-111
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• 2018

The Korean government has been trying to conserve a marine ecosystem that has been shifting due to climate change. As part of this effort, the government designated seventy-seven marine species that have been disappearing and deserve to be protected as endangered managing them specially. To generate basic data to guide policy for these endangered species, their value must be measured. OOf the species declared endangered, coral is particularly threatened by climate change, and its management is important. Accordingly, understanding the potential value of reefs, can be an effective way of proving the benefits of continuous management to decision makers and the general public alike. To this end, we have applied the contingent valuation method (CVM), an economic technique of for valuing a environmental and non-market goods such as a coral reef. A national face-to-face survey of 1,000 randomly selected households was conducted in order to determine the public's willingness to pay (WTP) for conserving coral reefs. A one-and-one-half-bound (OOHB) model was adopted to interpret WTP responses, and a spike model was employed to deal with zero WTP responses. The results show that the conservation value of a coral reef can be estimated at 3,016 won per household per year, statistically significant at the 1 % level. Expanding values to the national population gives an annual value of 58.9 billion won. We can conclude that the public is willing to pay a significant amount to conserve coral reefs.

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 2008.09a
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• pp.212-215
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• 2008

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 2008.09b
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• pp.212-215
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• 2008