• The Journal of the Acoustical Society of Korea
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• v.22 no.7
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• pp.592-602
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• 2003

This paper aims to describe the basic structure of novel object-based 3D audio broadcasting system To overcome current uni-directional audio broadcasting services, the object-based 3D audio broadcasting system is designed for providing the ability to interact with important audio objects as well as realistic 3D effects based on the MPEG-4 standard. The system is composed of 6 sub-modules. The audio input module collects the background sound object, which is recored by 3D microphone, and audio objects, which are recorded by monaural microphone or extracted through source separation method. The sound scene authoring module edits the 3D information of audio objects such as acoustical characteristics, location, directivity and etc. It also defines the final sound scene with a 3D background sound, which is intended to be delievered to a receiving terminal by producer. The encoder module encodes scene descriptors and audio objects for effective transmission. The decoder module extracts scene descriptors and audio objects from decoding received bistreams. The sound scene composition module reconstructs the 3D sound scene with scene descriptors and audio objects. The 3D sound renderer module maximizes the 3D sound effects through adapting the final sound to the listner's acoustical environments. It also receives the user's controls on audio objects and sends them to the scene composition module for changing the sound scene.

• Korean Journal of Crystallography
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• v.18 no.1_2
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• pp.16-20
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• 2007

Under hydrothermal conditions, a 2-dimensional copper(I) coordination polymer [$Cu_2Cl_2$(4,4'-dipyen)] (1) was prepared from [$Cu(OAc)_2]{\cdot}H_2O$, 4,4'-dipyen, and KCl. In polymer 1, copper atoms are linked by the 4,4'-dipyen ligands approximately along the b-axis and are also linked by the chloro ligands approximately along the a-axis to form a 2-D layer, a network of rectangles.

• Broadcasting and Media Magazine
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• v.26 no.4
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• pp.23-39
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• 2021

2차원 영상을 3차원 모델 영상으로 변환하는 방식이 다양하게 발전해오고 있다. 딥러닝의 발전 중 특히 GAN의 다양한 연구는 2차원 영상의 생성뿐만 아니라 다양한 3차원 영상의 생성에도 진전을 보였다. 본 고에서는 2차원 영상을 3차원 영상으로 변환하는 연구의 필요성을 바탕으로 관련 연구의 내용과 동향을 분석하였다. 주요 내용으로는 딥러닝 기반의 3차원 객체인식, 2D로부터 3D 변환을 위한 신경망에 대한 연구, 생성적 기법을 적용한 연구, 3D 모델링 도구 등이 포함된다. 관련 연구의 전반적인 흐름을 고려했을 때 향후 3D 모델링의 정교한 표현력 향상, 고속의 고해상도 렌더링, 편리한 온라인 접근성 등을 예상하게 된다. 관련 산업 종사자들에게는 생성시간의 단축을 가져올 수 있고 일반인은 전문적인 3D 기술이 없어도 우수한 3D 모델을 생성하고 활용할 수 있을 것으로 기대한다.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2002.10a
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• pp.175-179
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• 2002

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2009.04a
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• pp.317-318
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• 2009

3차원 모델링 기술에 관한 이론적인 연구는 활발히 진행 중에 있으나 이를 실제로 구현한 사례는 극히 드물다. 현재 사용되고 있는 3차원 모델은 가시화에 초점을 두고 있어 토폴로지 구조를 갖고 있지 않는다. 따라서 3차원 공간 분석이나 어플리케이션 개발에 한계가 있다. 그러나 공간 DBMS를 이용함으로써 토폴로지 기반의 모델을 생성하고 다양한 공간 분석 및 가시화에 활용할 수 있다. 본 연구에서는 공간데이터베이스 기반의 4가지 3차원 데이터모델을 제시하고 이들의 쿼리 수행능력을 비교 분석해 봄으로써 분석 및 가시화에 적합한 모델을 제안한다.

• Proceedings of the Korean Fiber Society Conference
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• 1998.10a
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• pp.365-368
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• 1998

2차원으로 제도, 재단 과정을 거친 의복 패턴이 3차원의 형상을 갖는 의복으로 만들어져 인체와의 접촉의 결과 생기는 착장 상태를 확인하는 작업에 3차원 의복 CAD 시스템을 이용하면, 직접 재단 봉제 시착(찰볼) 등 일련의 과정을 거치지 않고도, 만들어진 의복의 형상과 착장 상태를 확인해볼 수 있다는 장점이 있다. 이러한 3차원 시스템에서는 의복의 자연스런 처짐, 이른바 드레이프(4.ape)를 잘 표현하여야만 실제에 최대한 가까운 의복의 형상을 보여줄 수 있다. (중략)

• Journal of the Korean Geosynthetics Society
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• v.15 no.4
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• pp.25-32
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• 2016

The two-dimensional (2D) analysis is widely used in geotechnical engineering for slope stability analysis assuming a plane-strain condition. It is implicitly assumed that the slip surface is infinitely wide, and thus three-dimensional (3D) end effects are negligible because of the infinite width of the slide mass. The majority of work on this subject suggests that the 2D factor of safety is conservative (i.e. lower than the 'true' 3D factor of safety). Recently, the 3D finite element method (FEM) became more attractive due to the progress of computational tools including the computer hardware and software. This paper presents the numerical analyses on rotational mode and translational mode slopes using the 2D and 3D FEM as well as 2D limit equilibrium methods (LEM). The results of the parametric study on the slope stability due to mesh size, dilatency angle, boundary conditions, stress history and model dimensions change are analysed. The analysis showed that the factor of safety in 3D analysis is always higher than that in the 2D analysis and the discrepancy of the slope width in W direction on the factor of safety is ignored if the roller type of W direction conditions is applied.

• Journal of the Korean Association of Geographic Information Studies
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• v.25 no.4
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• pp.49-62
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• 2022

Borehole Data is geotechnical information provided so that workers can safely perform construction at the field. It creates 3D data and supports viewing as a 3D image. Currently, all Korean companies that develop programs using 3D visualization use the MVS program developed by C Tech Development Corporation. However, the MVS program is a commercial program, and it is difficult to use MVS in 3D related programs developed by Korean Companies. In this paper, we propose to develop a program that can replace MVS to generate a 3D stratum model from clustered borehole information using Python's Gempy open-source. The 3D stratum model program can creates point data for each stratum and can creates a surface for each stratum through interpolation. Then, the 3D stratum model program is completed by merging the surfaces of each stratum. It was confirmed that there was no difference when a 3D model was created and compared with the MVS program and the proposed program from the borehole data of a Goyang area.

• Korean Journal of Optics and Photonics
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• v.17 no.4
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• pp.329-334
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• 2006

We have reconstructed 3-dimensional images by using the digital holographic microscope and the Mask-cut phase unwrapping algorithm. Off-axis holograms recorded with a magnified image of the microscopic object lens and reference beam are numerically reconstructed in amplitude and phase image by the Fresnel diffraction approximation. We have simultaneously reconstructed 2-dimensional and 3-dimensional images of the sub-micrometer objects.

• Journal of the Korean Society for Library and Information Science
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• v.47 no.4
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• pp.335-361
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• 2013

This study tries to develop the so-called LCSI (Library Customer Satisfaction Index) Lite for public library which can be used easily in the fields as a simplified model. Its conceptual model is developed from the former research about library service quality and customer satisfaction. Based on the analyses on the twenty Delphi-type AHP questionnaires both from the library researchers and from the public library practitioners, and on the analysis and testing of the structural equation model using the data from the more than 800 user questionnaires, it suggests a model which consists of total 15 items - namely 8 items for service quality (2 for personnel, 4 for library resources and services, 2 for facilities and environment), 3 items for customer satisfaction, and 2 items for loyalty. Library Satisfaction Index for public library will be calculated by the sum total of service quality (50%), customer satisfaction (40%), and loyalty (10%).