• 디지털융복합연구
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• 제15권1호
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• pp.393-401
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• 2017

이 연구는 마음그램을 활용한 인성교육프로그램의 개발을 위한 기초적인 틀과 방향을 제시하는 데에 목적이 있다. '마음그램'이란 기존의 분석심리학 및 유식학의 마음구조를 기반으로 인간의 마음을 네 가지 마음자리(탐닉형, 분노형, 경쟁형, 이기심형)로 유형화하고, 이를 위한 인성교육의 단계적 구조를 알기 쉽게 도식화한 것을 말한다. 마음유형별 프로그램의 설계는 세 단계로 구성된다. 첫 번째 단계는 관찰을 통해 자아의식의 원인을 자각하는 '발견'의 단계이며, 두 번째는 부정적인 욕구를 긍정적인 욕구로 조절하는 학습과정인 '전환'단계, 세 번째는 공동체의식의 함양을 목표로 하는 타자와의 '관계'지향의 단계이다.

• 전자공학회논문지
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• 제50권5호
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• pp.137-143
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• 2013

최근들어 기계중심의 기술에서 점차 인간 중심의 기술로 변화되어가려는 시도가 많이 이루어지고 있다. 지능 시스템 연구에 있어서도 과거의 단순 학습과 추론 방식에서 지금은 보다 인간과 흡사한 처리, 즉 인간다움을 묘사하는 기능을 구현하려는 방향으로 나아가고 있다. 특히 뇌공학적인 연구가 활발해 짐에 따라 두뇌기능을 공학적으로 응용하려는 연구가 많아지고 있다. 본 논문에서는 이러한 '관점' 이라는 가치관적 상위 요소를 반영할 수 있는 Super Value라고 하는 개념을 정의하고 이에 따라 유연한 추론을 할 수 있는 KEB(Knowledge-Emotion Binding)시스템을 제안하였다. Main Level과 Super Level의 계층적 구조로 추론 과정의 유연성을 부여하였으며 추론 메커니즘에 의하여 KEB 스레드가 추출이 되도록 설계하였다.

• 한국전자거래학회지
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• 제12권2호
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• pp.233-247
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• 2007

급변하는 기업환경에 신속히 대응하기 위하여 기업의 업무는 비즈니스 프로세스 중심으로, 정보 인프라는 웹서비스 기반으로 재편되어가고 있으며, 기업의 정보시스템은 BPMS를 중심으로 다시 구축되어갈 것으로 전망된다. 이러한 배경하에 본 연구에서는 e-비즈니스 고도화의 방향으로 SOA(Service oriented architecture)를 설정하고, 전문가들을 대상으로 한 설문조사를 통해 e-비즈니스 기술과 BPM 기능요소 간의 상관도 분석을 수행하였으며, 이를 바탕으로 서비스 지향의 e-비즈니스 고도화를 위한 BPM 발전과제들의 우선순위를 제시하였다. 연구의 결과는 BPM 솔루션 업체, 도입기업 및 정책입안자들에게 중요한 참고자료로 활용될 수 있을 것이다.

• IEIE Transactions on Smart Processing and Computing
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• 제4권4호
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• pp.237-250
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• 2015

This paper describes a hardware-oriented algorithm and its conceptual implementation in a real-time speed limit traffic sign detection system on an automotive-oriented field-programmable gate array (FPGA). It solves the training and color dependence problems found in other research, which saw reduced recognition accuracy under unlearned conditions when color has changed. The algorithm is applicable to various platforms, such as color or grayscale cameras, high-resolution (4K) or low-resolution (VGA) cameras, and high-end or low-end FPGAs. It is also robust under various conditions, such as daytime, night time, and on rainy nights, and is adaptable to various countries' speed limit traffic sign systems. The speed limit traffic sign candidates on each grayscale video frame are detected through two simple computational stages using global luminosity and local pixel direction. Pipeline implementation using results-sharing on overlap, application of a RAM-based shift register, and optimization of scan window sizes results in a small but high-performance implementation. The proposed system matches the processing speed requirement for a 60 fps system. The speed limit traffic sign recognition system achieves better than 98% accuracy in detection and recognition, even under difficult conditions such as rainy nights, and is implementable on the low-end, low-cost Xilinx Zynq automotive Z7020 FPGA.

• 한국자기학회지
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• 제10권4호
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• pp.178-182
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• 2000

본연구에서는 서로 직교하는 yoke 장치와 4-채널 과도기록장치를 사용하여 회전하는 자기장을 발생시키고, 회전자화에 의한 자기적 손실을 측정할 수 있는 측정시스템을 구성하였다. 개발된 측정장치를 사용하여 무방향규소강의 회전자화에 의한 자기적특성을 측정하였으며, 회전자화에 의한 손실의 측정에서 자기유도성분의 측정방향과 자화력성분의 측정방향이 일치하지 않아, 시계방향 및 반시계방향으로 측정한 값이 차이를 나타내었다. 그러나 시계방향 및 반시계방향으로 측정한 회전자화에 의한 손실값의 평균은 일정함을 알 수 있었으며, 이를 이용할 경우 회전자화의 폭정오차를 줄일 수 있었다.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2007년도 정기학술발표대회 논문집
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• pp.943-946
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• 2007

최근 가변성능에 관하여 공간, 재료, 구조, 공법 등 건설 산업 전반에 걸쳐 많은 연구가 진행 중이다. 시대적인 주거환경 변화, 미래지향적인 건설 트랜드 변모 그리고 수요중심적인 인식을 만족하기 위해서 주택의 모습과 공간, 형식이 진화되어가고 있다. 이에 따라 본 연구에서는 가변성을 지니고 있는 건축의 성능요소들을 비교 분석하여 대안을 제시하고자 하며, 적용 가능한 다양한 분류예시를 통하여 실제적인 차세대 장수명화를 실현시키기 위한 방향과 지침을 제시하고자한다.

• Carbon letters
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• 제5권3호
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• pp.108-112
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• 2004

Effect of silicon infiltration on the bend and tensile strength of 2D cross-ply carbon-carbon composites are studied. It is observed that bend strength higher than tensile strength in both types of composite is due to the different mode of fracture and loading direction. After silicon infiltrations bend and tensile strength suddenly decreases of carbon-carbon composites. This is due to the fact that, after silicon infiltration, silicon in the immediate vicinity of carbon forms the strong bond between carbon and silicon by formation silicon carbide and un-reacted silicon as free silicon. Therefore, these composites consist of three components carbon, silicon carbide and silicon. Due to mismatch between these three components secondary cracks developed and these cracks propagate from $90^{\circ}$ oriented plies to $0^{\circ}$ oriented plies by damaging the fibers (i.e., in-situ fiber damages). Hence, secondary cracks and in-situ fiber damages are responsible for degradation of mechanical properties of carbon-carbon composites after silicon infiltration which is revealed by microstructure investigation study by scanning electron microscope.

• Steel and Composite Structures
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• 제24권6호
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• pp.711-726
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• 2017

In the present work, by considering the agglomeration effect of single-walled carbon nanotubes, free vibration characteristics of functionally graded (FG) nanocomposite sandwich plates resting on Pasternak foundation are presented. The volume fractions of randomly oriented agglomerated single-walled carbon nanotubes (SWCNTs) are assumed to be graded in the thickness direction. To determine the effect of CNT agglomeration on the elastic properties of CNT-reinforced composites, a two-parameter micromechanical model of agglomeration is employed. In this research work, an equivalent continuum model based on the Eshelby-Mori-Tanaka approach is employed to estimate the effective constitutive law of the elastic isotropic medium (matrix) with oriented straight CNTs. The 2-D generalized differential quadrature method (GDQM) as an efficient and accurate numerical tool is used to discretize the equations of motion and to implement the various boundary conditions. The proposed rectangular plates have two opposite edges simply supported, while all possible combinations of free, simply supported and clamped boundary conditions are applied to the other two edges. The benefit of using the considered power-law distribution is to illustrate and present useful results arising from symmetric and asymmetric profiles. The effects of two-parameter elastic foundation modulus, geometrical and material parameters together with the boundary conditions on the frequency parameters of the laminated FG nanocomposite plates are investigated. It is shown that the natural frequencies of structure are seriously affected by the influence of CNTs agglomeration. This study serves as a benchmark for assessing the validity of numerical methods or two-dimensional theories used to analysis of laminated plates.

• Steel and Composite Structures
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• 제31권5호
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• pp.529-539
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• 2019

Current paper deals with thermoelastic static and free vibrational behaviors of axisymmetric thick cylinders reinforced with functionally graded (FG) randomly oriented graphene subjected to internal pressure and thermal gradient loads. The heat transfer and mechanical analyses of randomly oriented graphene-reinforced nanocomposite (GRNC) cylinders are facilitated by developing a weak form mesh-free method based on moving least squares (MLS) shape functions. Furthermore, in order to estimate the material properties of GRNC with temperature dependent components, a modified Halpin-Tsai model incorporated with two efficiency parameters is utilized. It is assumed that the distributions of graphene nano-sheets are uniform and FG along the radial direction of nanocomposite cylinders. By comparing with the exact result, the accuracy of the developed method is verified. Also, the convergence of the method is successfully confirmed. Then we investigated the effects of graphene distribution and volume fraction as well as thermo-mechanical boundary conditions on the temperature distribution, static response and natural frequency of the considered FG-GRNC thick cylinders. The results disclosed that graphene distribution has significant effects on the temperature and hoop stress distributions of FG-GRNC cylinders. However, the volume fraction of graphene has stronger effect on the natural frequencies of the considered thick cylinders than its distribution.

• 대한안전경영과학회지
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• 제23권3호
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• pp.35-45
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• 2021

Activities to prevent industrial accidents can be divided into management of disaster risk factors of production facilities, disaster prevention systems and procedures, and human factors management. Human factor management is the last and most effective means to minimize disaster incidence and loss costs. The key strategy for this is safety and health education. However, formal or fictitious education is still being carried out in the industrial field. In addition, it is true that the application of practical use is insufficient due to the simple theoretical education based on knowledge transfer. In order to change the safety consciousness of employers and workers, we think that the paradigm of education should be changed from the traditional text and video-oriented lecture education method to experience-oriented education. The purpose of this study is to measure and analyze the effectiveness of safety education through education contents using VR(Virtual Reality) and AR(Augmented Reality) technology in keeping with the changing times of the 4th Industrial Revolution, And to suggest the direction of future safety and health education and content development trend.