• Proceeding of EDISON Challenge
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• 2015.03a
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• pp.177-183
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• 2015

$\text\tiny{D}$-Psicose 3-Epimerase (DPE)는 $\text\tiny{D}$-Fructose의 C3 Epimerase로써 $\text\tiny{D}$-Fructose를 $\text\tiny{D}$-Psicose로 전환해 주는 효소이다. $\text\tiny{D}$-Psicose는 설탕 대신 사용하는 감미료로 몸에 흡수되지 않아 칼로리가 없다고 알려져 있고 자연에서는 오로지 DPE에 의해서만 생산되는 희귀당이다. 이에 따라 DPE를 통한 $\text\tiny{D}$-Psicose 대량생산의 필요성이 대두되고 있는 등 이 분야에 대한 관심이 뜨거운 실정이다. 본 연구팀은 이 당과 관련된 작용기작 연구를 수행하기 위하여 아직 단백질 3차구조가 알려지지 않은 Clostridium hylemonae DPE (chDPE) 단백질의 3차 구조예측 연구를 수행 하였다. 우리는 HHsearch를 이용하여 agrobacterium tumefaciens의 DPE 외 2개의 구조를 호몰로지 모델링 연구를 위한 주형으로 선정하였다. 다음으로 PROMALS3D를 이용하여 주형들과 chDPE의 multiple sequence alignment를 수행하였고 이를 바탕으로 3차구조 예측 연구를 수행 하였다. 예측된 구조를 검증하기 위하여 ProSA와 Ramachandran plot분석을 이용하였고 Ramachandran plot에서 단백질의 94.8%에 해당하는 잔기들이 favoured regions에 위치하였다. ProSA에서는 Z-score값이 -9.3으로 X-선 결정학이나 핵자기 공명법으로 밝혀진 구조들에서 관측되는 범위 내에 위치하였다. 나아가 예측된 구조에 $\text\tiny{D}$-Psicose와 $\text\tiny{D}$-Fructose의 결합모드를 규명하기 위하여 도킹을 시도하였다. 이번 연구를 통하여 chDPE의 구조를 예측 할 수 있었고 이를 바탕으로 이 단백질의 기능을 이해하는데 도움을 줄 것으로 기대된다.

• Journal of Korea Multimedia Society
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• v.14 no.8
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• pp.1094-1107
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• 2011

We can use panorama systems or image based modeling systems when we want to make 3D space model and look around result. Panorama systems make 3D model to stitch images and map cylinder or cube. The structure of 3D model, made by panorama system, is not same as structure of a real room, so user can't infer a real structure. Typically, Image based modeling systems work on a desktop computer. That makes it difficult to reconstruct 3D model in real time and take long time for processing. In this paper, we propose a 3D panorama modeling system that uses images on a mobile device. This system reconstructs a 3D space model, similar with a real room in real time, from multiple images captured part of rooms. Using this system, user can reconstruct various shape of space and look around a 3D space model.

• Proceedings of the Korea Contents Association Conference
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• 2017.05a
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• pp.5-6
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• 2017

본 연구는 소형 캐릭터의 다양한 관절운동을 선형제어를 통해 재현하기 위한 다관절 구조를 논의한다. 최소 동력원으로 복수 관절부를 제어하여 다양한 동세를 표현하기 위해 개별 관절구조를 설계하고 3D 프린팅을 통해 제작한다. 형상 변형 및 다자유도 확보를 위한 볼 조인트 형식을 적용하여 캐릭터의 다양한 운동성을 논의한다. 3D 프린팅 적용 시 구동 특성을 재현하기 위해 구조별 설계와 소재별 프린팅 운영 특성을 기술함으로써 효과적인 관절구조 설계와 3D 프린팅의 연계 방법을 찾고자한다.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.43 no.9 s.351
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• pp.99-104
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• 2006

In this paper, the conventional 2 dimensional metamaterial structure has degeneration of shielding characteristic in cross polarization effect. The proposed 3-D resonator is designed for reduction of cross polarization effect. The proposed 3-D resonator using LTCC consists of 2-D parallel resonators on X-axis, Y-axis and Z-axis. The 2-D parallel resonator consists of two plate and one via. When the co-polarization electric filed is excited, the resonance frequency of 3-D resonator is 5.024GHz. The stop bandwidth is 19MHz. When the cross-polarization electric field is excited, the resonance frequency of 3-D resonator is 4.825GHz. The stop bandwidth is 19MHz. The proposed 3-D resonator achieve reduction of cross-polarization effect. The concrete consists of proposed 3-D resonator and absorbtion materials. The concrete will be applied for reduction or interference signal of ETCS(Electric Toll collection system).

• Journal of the Korea Society of Computer and Information
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• v.15 no.11
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• pp.1-9
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• 2010

As the process technology scales down, an interconnection has became a major performance constraint for multi-core processors. Recently, in order to mitigate the performance bottleneck of the interconnection for multi-core processors, a 3D integration technique has drawn quite attention. The 3D integrated multi-core processor has advantage for reducing global wire length, resulting in a performance improvement. However, it causes serious thermal problems due to increased power density. For this reason, to design efficient 3D multi-core processors, thermal-aware design techniques should be considered. In this paper, we analyze the temperature on the 3D multi-core processors in function unit level through various experiments. We also present temperature characteristics by varying application features, cooling characteristics, and frequency levels on 3D multi-core processors. According to our experimental results, following two rules should be obeyed for thermal-aware 3D processor design. First, to optimize the thermal profile of cores, the core with higher cooling efficiency should be clocked at a higher frequency. Second, to lower the temperature of cores, a workload with higher thermal impact should be assigned to the core with higher cooling efficiency.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.21 no.3
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• pp.247-252
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• 2008

Recently, the virtual construction system in which project participants efficiently share and control the information throughout the life-cycle of construction project using 3D object models is being developed all over the world. In this paper, a design of interface between 3D object model of structures and structural analysis system that is essential for the analysis and design of civil structures in the virtual space is treated. The relation parametric modeling technique that is needed to make the 3D object models and the construction method of product breakdown structure(PBS) that considers the several parameters for the structural analysis are presented. PBS is built so that it is possible to extract needed attribute information from 3D object model and to apply it to the structural analysis. Design methodology for interface program is proposed that several numerical values determined by the cooperative work same as structural analysis are delivered to 3D object models without additional work. An interface program between 3D object models and structural analysis system developed based on the proposed method would be effectively used to develop virtual construction system.

• Journal of the Korean Vacuum Society
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• v.5 no.4
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• pp.315-326
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• 1996

The electronic structures of 3d and 4d core-levels of rare-earth atoms in the insulating rare-earth (Sm, Eu, Gd, and Tb) compounds were studied with x-ray photoelectron spectroscopy(XPS). It is shown that the intrinsic satellite structure due to the hybridization disappears for chemically stable-earth trivalent heavy rare-earth insulating compounds as the hybridization between f electrons of rare-earth atoms and p electrons of anion atoms decreases due to the lanthanide contraction. Eu atoms at the surface of the stable insulating trivalent Eu compounds are found to be divalent. The satellite peak of Eu 3d core-level spectra at about 10eV higher binding energy side relative the main peak comes from the multiplet structures of $\underline{3d}4f^6$ configuration. The satellite structure appearing at about 15 eV higher binding energy side relative to the main peak in all insulating rare-earth compounds is due to an energy loss process of creating a plasmon.

• Journal of Korea Multimedia Society
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• v.10 no.3
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• pp.381-390
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• 2007

3D object contents are used for various applications in the Web virtual space, where the main concerns are to navigate the 3D virtual space and visualize 3D objects. The techniques to manipulate 3D objects like disassembling and assembling and to record the manipulation process are the very first step. Until now, we can record only the result of 3D object manipulation. Thus, we have tried to study the representation technique to record meaningfully and replay the manipulation process of 3D structured objects. We analyzed the structures and their relations between components to construct 3D objects that are described in XML or VRML. Compared to the previous method, we studied a XML based annotation technique to record and store selectively by user. This technique makes 3D structured objects be used in the various applications by the selective recording and also selective replaying.

• Applied Microscopy
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• v.38 no.2
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• pp.73-79
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• 2008

In Biology, Studies Using Electron Microscopy for making Cell Structure to 3D reconstruction very fast development. Recently, by using Cryo fixation, we can see cell 3D structure without structural change, instead of using chemical fixation which can change cell structure. Before using this technology, we could understand cell structures only in 2D images. But now, through cryo-ET, 3D reconstruction of cell structure without artificial structure changes can be possible and this technology will give us many advantages in Drug delivery and Nanothechnology.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.26 no.5
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• pp.682-687
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• 2022

In this paper, the research results on monolithic three-dimensional integrated-circuit (M3DICs) stacked with tunneling field effect transistors (TFETs) are introduced. Unlike metal-oxide-semiconductor field-effect transistors (MOSFETs), TFETs are designed differently from the layout of symmetrical MOSFETs because the source and drain of TFET are asymmetrical. Various monolithic 3D inverter (M3D-INV) structures and layouts are possible due to the asymmetric structure, and among them, a simple inverter structure with the minimum metal layer is proposed. Using the proposed M3D-INV, this M3D logic gates such as NAND and NOR gates by sequentially stacking TFETs are proposed, respectively. The simulation results of voltage transfer characteristics of the proposed M3D logic gates are investigated using mixed-mode simulator of technology computer aided design (TCAD), and the operation of each logic circuit is verified. The cell area for each M3D logic gate is reduced by about 50% compared to one for the two-dimensional planar logic gates.