• Journal of the Institute of Electronics Engineers of Korea CI
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• v.45 no.3
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• pp.40-46
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• 2008

3D visualization of geological environments using remotely sensed data and the various sources of data provides new methodology to interpret geological observation data and analyze geo-information in earth science applications. It enables to understand spatio-temporal relationships and causal processes in the three-dimension, which would be difficult to identify without 3D representation. To build more realistic geological environments, which are useful to recognize spatial characteristics and relationships of geological objects, 3D modeling, topological analysis, and database should be coupled and taken into consideration for an integrated configuration of the system. In this study, a method for 3D visualization, extraction of geological data, storage and data management using remotely sensed data is proposed with the goal of providing a methodology to utilize dynamic spatio-temporal modeling and simulation in the three-dimension for geoscience and earth science applications.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.8
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• pp.5571-5578
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• 2015

In this paper, we analyzed Alamouti based the MIMO-OFDM system in an underwater vertical communication channels. These in consideration both the transmission loss the multipath loss which is suitable for underwater environment are necessary method to improve the efficiency and communication performance in underwater communication. This paper is modeled in an environment that caused the error, considered each simulated the multi-path loss, transmission loss, the Doppler spread in order to implement a practical communication environment and simulated through the MIMO-OFDM system of Alamouti STBC method. The MIMO-OFDM system 2Tx-2Rx of Alamouti STBC scheme in underwater vertical communication system is obtained about 3~5 dB gain as compare with its 2Tx-1Rx scheme with reference $10^{-3}$ BER.

• Korean Journal of Construction Engineering and Management
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• v.10 no.1
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• pp.136-145
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• 2009

The objective of the Intelligent Excavation System (IES) is to recognize the work environment and produce work plan and automatically control the excavator through integrating sensor and robot technologies. This paper discusses one of the core technologies of IES development project, development of 3D work environment modeling. 3D laser scanner is used for 3-dimensional mathematical model that can be visualized in virtual space in 3D. This paper describes (1) how the most appropriate 3D imaging system has been chosen; (2) the development of user interface and customization of the s/w to control the scanner for IES project; (3) the development of the mobile station for the scanner; (4) and the algorithm for the automatic registration of laser scan segments for IES project. The development system has been tested on the construction field and lessons learned and future development requirements are suggested.

• 한국HCI학회:학술대회논문집
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• 2006.02b
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• pp.221-226
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• 2006

원격 3차원 디자인 협업 환경이란 원거리에 있는 디자이너들이 3차원 모델을 함께 동시적으로 다루는 협업 환경으로서, 제품 개발 프로세스의 비용과 시간을 단축하는데 매우 중요한 역할을 한다. 그러나 이에 대한 연구는 아직 미비한 실정이며 기존의 연구들도 2차원 데스크탑 환경에 제한된 문제점이 있다. 따라서 본 연구는 새로운 협업 환경의 제안을 통해 지리적으로 떨어진 디자이너들간의 3D 모델에 관한 원활한 협업을 촉진하는 것을 목표로 한다. 본 연구에서 제안한 증강현실 기반의 원격 3차원 디자인 협업 환경은 3D 모델의 공유를 위한 회전 원반(turntable)과 상대의 위치 및 제스처 정보를 제공하는 가상 그림자(virtual shadows)로 구성된다. 동시적으로 회전하는 회전원반은 물리적인 매개체로서 가상물체와 실제 세계를 자연스럽게 연결하는 동시에 상대의 실재감을 높인다. 가상그림자는 가상물체 주위로 보여지는 사람들의 손과 팔의 움직임을 시각화하여 공유하는 것으로, 상대의 위치뿐 아니라 지시, 제스처 등 행동에 대한 인식이 지속적으로 이루어지게 한다. 프로토타입을 제작하고 사용자 평가 실험을 실시하여 3차원 모델을 검토하는 단계에 그 유용성이 있음을 확인하였다. 데스크탑 환경의 모델링 툴에 익숙한 사용자들은 실제 공간에서 가상물체를 조작할 수 있음에 긍정적인 반응을 보였고 회전원반과 가상그림자의 제공은 태스크 수행의 정확도를 높이며 협업을 촉진하는 결과를 보였다. 본 연구는 환경적 제약으로 원활하게 이루어지지 못했던 3D 모델에 관한 원격 협업에 의사소통의 장을 마련하고 이를 촉진시킨다는 점에서 그 의의가 있다. 본 환경에서 제시한 상대방과 협업대상물에 대한 심리적, 물리적 공유 감을 증대시키는 방법들은 3D 모델에 관한 디자인 협업에서 확장되어 다른 원격 협업을 지원하는 데도 적용될 수 있을 것이다.

• Economic and Environmental Geology
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• v.48 no.4
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• pp.313-324
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• 2015

This study constructed a 3D geological model for Uggi Nuur Fe-Mn mineralization zone in Mongolia, and the 3D geological distribution is cross-analyzed with magnetic anomaly distribution to figure out relationship between ore zone and subsurface geology. As a result of 4 step 3D modeling procedures including geological cross section, surface modeling, foliation modeling and solid modeling, the geology of the both study area is bordered by faults in NW direction with Munguntessj formation being located in the west side of the fault while Yashill formation is located on the other side of the fault. Moreover, the strike direction of foliation in the both formation shows same directional pattern with the NW faults. The magnetic anomaly distribution reveals that higher anomaly values are concentrated to near the ground surface. The analyses of 3 dimensional distribution between subsurface geology and magnetic anomaly indicates that higher anomaly is mainly distributed over the Munguntessj formation as a elongated lens bodies whereas the magnetic anomaly is evenly found in the both of Munguntessj formation and Yashill formation in the study area 2. It infers that volcanic activities associated mineralization occurred during silurian period, and the mineralized zone is thought to be realigned along the geological structures caused by later stage tectonic activities.

• Journal of Game and Entertainment
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• v.2 no.1
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• pp.64-70
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• 2006

CAD system is a very important technology in designing many products which we are using today. This CAD technology have enlarging its area into 3D CAD systems with the development of computer graphics technologies. In particular, such advances have also been realized in special area such as the CAD system for designing shoes. 3D CAD systems for shoes design must provide compatibility between 3D and 2D data because shoes are made using 2D parts of pieces of leather or cloth. Many designers get high performances using 2D shoe CAD systems because they have had long practices with the 2D systems. Therefore, to get the mapping between 2D modeling and 3D modeling is one of very important components in 3D CAD system. In this paper, we proposed a flattening method that convert 3D shoes data to 2D data.

• Journal of The Korean Association of Information Education
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• v.23 no.3
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• pp.219-227
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• 2019

The educational method of physical computing, where students can experience software programming principles and practices while making concrete objects beyond outputs residing just inside of computer monitors, are drawing attentions. This current research sought an instructional method for pre-service teachers that they can experience 3D printing and modeling and at the same time they can understand programming principles in the 3D modeling processes. To achieve this aim, the TinkerCAD $Codeblocks^{(R)}$ was analyzed based on the computational thinking framework and a course utilizing the $Codeblocks^{(R)}$ to 3D modeling was devised. The designed class was applied to pre-service teachers and the students' perceptions of the class were collected by using a semi-structured survey. This study provides implications to software education for pre-service teachers as an instructional case that 3D printing is used to connecting computational thinking skills.

• The KIPS Transactions:PartD
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• v.14D no.1 s.111
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• pp.97-106
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• 2007

In this paper, the business process was easily modeled by distinguishing between the business process and work logic. Based on this model, B2Bi collaboration Workflow modeling tool, which facilitates collaboration, was designed and implemented. The collaboration workflow modeling tool consists of 3 components; business process modeling tool, execution engine and monitoring tool. First, a business process modeling tool is used to build a process map that reflects the business logic of an application in a quick and accurate manner. Second an execution engine provides a real-time execution environment for business process instance. Third, a monitoring tool provides a real-time monitoring function for the business process that is in operation at the time. In addition to this, it supports flexibility and expandability based on XML and J2EE for the linkage with the legacy system that was used previously, and suggests a solution for a new corporate strategy and operation.

• 한국HCI학회:학술대회논문집
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• 2007.02a
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• pp.83-88
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• 2007

이 논문에서는 카메라와 간단한 마커(Marker)를 이용하여 디포머블(Deformable)한 3차원의 도자기 모델을 손을 이용하여 자연스러우면서도 직관적으로 변형시키고, 이를 실제 물체들과 같이 디스플레이 해 줌으로써 실재감을 느낄 수 있는 새로운 시스템을 제안한다. 제안된 시스템에서는 값비싸면서도 거추장스러운 장비를 사용하지 않고도 카메라와 마커의 상대적인 위치를 통해서 손의 움직임을 알아내게 되고, 알아낸 움직임을 이용하여 물체를 이동시키거나 변형시키는 등의 모델링 인터페이스를 제공한다. 그리고 실시간으로 변형된 모델에 대한 결과를 증강현실을 이용하여 실제 환경 상에 존재하는 것과 같이 디스플레이 해 주는 방법을 통해서 물체의 크기 및 모양을 좀더 실재감 있게 느낄 수 있게 한다. 이러한 방법은 비단 도자기뿐만 아니라 다양한 분야에 활용 가능하며, 보통 컴퓨터가 있는 집에 화상카메라가 하나 정도는 있다는 점에서 활용 가능성이 상당히 크다 할 수 있을 것이다.

• Electronics and Telecommunications Trends
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• v.11 no.4 s.42
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• pp.27-36
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• 1996

음악은 컴퓨터 음악, 인간-컴퓨터 상호작용, 데이터 청각화 그리고 최근 들어 컴퓨터 애니메이션이나 가상환경등에서 중요한 부분을 차지해왔다. 지금까지 음향의 모델링이나 함성 등 음향 자체에 대한 요소 기술들에 관해서는 많은 연구가 진행되었으나 앞으로 컴퓨터 애니메이션, 가상환경 등과 같이 영상의 동작과 음향이 서로 밀접하게 연관된 분야에서는 음향을 동작과 통합 처리할 수 있는 기술이 필수적이다. 따라서 본 고에서는 컴퓨터 애니메이션이나 가상환경 등에서 영상 내 물체의 움직임, 그와 동기된 음향의 자동생성 기술의 원리, 그 요소 기술들, 그리고 앞으로의 전망 등을 기술한다.