• 디지털융복합연구
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• 제14권12호
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• pp.495-501
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• 2016

영화는 항상 실재(reality)와 허구(imagination)를 바탕으로 시대의 문화를 반영해 왔으며 영화에서의 시각 효과는 주로 현실을 더욱더 현실감 있게 표현하거나 가상을 현실로 인식시켜주는 역할을 해 왔다. 본 연구는 환상적 사실주의가 갖는 이미지를 이창동 감동의 오아시스를 통해 내표된 의미와 그 작용에 대해 알아보았다. 환상적 사실주의는 이미지로서 영화내의 시간과 공간에 영향을 미치며 인간의 보고자 하는 욕망과 보이고자 하는 욕망을 거울이라는 이중적 의미의 도구를 사용하여, 현실과 상상의 공간을 분리하였다. 또 비둘기라는 매개를 통해 현실 세계에 재현되었다. 영화 내러티브 구조에서 가시화된 공간과 비가시회된 공간을 분리시키고, 현실과 비현실적 공간의 분리, 의식과 무의식의 공간의 분리, 현실과 현실공간을 권력 구조로 분리하여 사용되었다. 기술의 발전과 함께 황상의 이미지는 우리에게 더 실재처럼 다가오고, 이는 우리가 생각하지 못한 무의식의 공간을 표현해 낼 것이다.

• 대한수학회논문집
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• 제28권1호
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• pp.107-121
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• 2013

The purpose of this paper is to investigate the demiclosed principle, the existence theorems and convergence theorems in CAT(0) spaces for a class of mappings which is essentially wider than that of asymptotically nonexpansive mappings. The structure of fixed point set of such mappings is also studied. Our results generalize, unify and extend several comparable results in the existing literature.

• 복식문화연구
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• 제18권5호
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• pp.842-856
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• 2010

The relationships between fashion and architecture have been interactive. Since the fashion has had the role to decide the structure type of urban environment, it is becoming the new sign of space boundary. This study searches the social and cultural characteristics of Nomadism and the relationships among all kinds of changing objects. After then, the module system characteristics are meditated by analyzing the composition method of module system in architecture. Moreover, the study examines the aesthetic values in the fashion and body architecture from artistic aspect. Based on the above discussion, the followings are the characteristics of body architecture as the social structures expressed in modern fashion. The liquidity is the fluid form of dynamic structures. It shows the extended space form which produces the continuity. The transformation is the variable structure by module system and it forms the diversified structural combination. The movement combines the controlling function to be able to regulate and move freely the body related objects. The convergence is the text combination interpenetrated mutually in enlarged space. Through this, the non-linear continuity and the access of the individual factors are shown.

• 대한기계학회논문집A
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• 제20권11호
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• pp.3560-3572
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• 1996

This paper presents a new discrete-time fuzzy-sliding mode controller for robust vibration control of a smart structure featuring a piezofilm actuator. A governong equation of motion for the smart beam structure is derived and discrete-time codel with mismatched uncertainties such as parameter variations is constructed ina state space. A discrete-time sliding mode control system consisting of an equivalent controller and a discontinuous controller is formulated. In the design of the equivalent part, so called an equivalent controller separation method is adopted to achieve vzster convergence to a sliding surface without extension of a sliding region, in which the system robustness maynot be guaranteed. On the other hand, the discontinuous part is constructed on the basis of both the sliding and the convergence conditions using a time-varying feedback gain. The sliding moide controller is then incorporated with a fuzzy technique to appropriately determine principal control parameters such as a discountinuous feedback gain. Experimental implementation on the forced and random vibraiton controls is undertaken in order to demonstrate superior control performance of the proposed controller.

• Journal of information and communication convergence engineering
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• 제8권1호
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• pp.95-98
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• 2010

The Electro Magnetic (EM) Acceleration and Deceleration (ACC/DCC) system of the Ferromagnetic Ball(FB) is the linear motor's final structural development which can be used for devices that conserve energy, gaming or rail gun. By accelerating the FB within the coil structure, it is difficult to utilize the FB's magnetizing feature via the ACC/DCC system. There is much monopole space inside the monopole coil. By using this particular feature of the FB, starting coil and Monopole Coil Structure (MCS) can be structurally separated and another simple electric related control system can be experimented for further development. For the purpose of development a review is needed of the control system of both basic stepper motor and BLDC motor.

• Journal of Positioning, Navigation, and Timing
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• 제13권3호
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• pp.221-235
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• 2024

Errors included in Global Navigation Satellite System (GNSS) measurements degrade the performance of user position estimation but can be mitigated by spatial correlation properties. Augmentation systems providing correction data can be broadly categorized into State Space Representation (SSR) and Observation Space Representation (OSR) methods. The satellite-based cm-level augmentation service based on the SSR broadcasts correction data via satellite signals, unlike the traditional Real-Time Kinematic (RTK) and Network RTK methods, which use OSR. To provide a large amount of correction data via the limited bandwidth of the satellite communication, efficient message structure design considering service area, correction generation, and broadcast intervals is necessary. For systematic message design, it is necessary to analyze the influence of error components included in GNSS measurements. In this study, errors in satellite orbits, satellite clocks for GPS, Galileo, BeiDou, and QZSS satellite constellations ionospheric and tropospheric delays over one year were analyzed, and their spatial decorrelations and linear modeling characteristics were examined.

• Structural Monitoring and Maintenance
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• 제1권4호
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• pp.427-449
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• 2014

A hybrid optimization method for the identification of state-space models is presented in this study. Hybridization is succeeded by combining the advantages of deterministic and stochastic algorithms in a superior scheme that promises faster convergence rate and reliability in the search for the global optimum. The proposed hybrid algorithm is developed by replacing the original stochastic mutation operator of Evolution Strategies (ES) by the Levenberg-Marquardt (LM) quasi-Newton algorithm. This substitution results in a scheme where the entire population cloud is involved in the search for the global optimum, while single individuals are involved in the local search, undertaken by the LM method. The novel hybrid identification framework is assessed through the Monte Carlo analysis of a simulated system and an experimental case study on a shear frame structure. Comparisons to subspace identification, as well as to conventional, self-adaptive ES provide significant indication of superior performance.

• 디지털융복합연구
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• 제18권11호
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• pp.207-214
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• 2020

본 연구는 다양한 환경에서 임시 주거를 위한 공간을 쉽게 구성하는 방법을 분석한다. 이를 위해 모듈라 조립식 건축 구조의 사례를 분석하고 임시 주거 공간을 형성할 수 있는 다양한 해결 방안을 탐색한다. 본 연구를 통해 예측이 불가능한 다양한 상황에서 사용자의 안정적 생활 환경을 위한 주거 공간을 구축하기 위해 다양한 방법을 제안하고자 한다. 이와 관련된 다양한 해외의 특허 사례를 수집하고 분석하여 다음과 같이 총 4가지의 그룹으로 그 결과를 도출하였다. 이는 1) 소규모 부품을 활용한 조립 방식, 2) 프리패브 모듈의 적층 방식, 3) 공간 확장 방식, 그리고 4) 세부요소의 제작 방식으로 구분될 수 있으며, 이를 기반으로 향후 보다 더 저비용 및 효율적으로 구축이 가능한 프리패브 임시 주거 공간의 구조를 연구하고자 한다.

• 방송공학회논문지
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• 제19권5호
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• pp.677-686
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• 2014

본 논문에서는 모바일폰 카메라를 이용하여 취득한 스테레오 영상으로부터 3차원 정보를 산출하고 이를 통해 3차원 정확도를 분석하고자 한다. 3차원 정확도 분석을 위해 스테레오 모델의 수렴각 변화에 따른 정확도 결과를 비교하였다. 본 논문에서는 내부 파라미터 산출과 영상의 왜곡보정 그리고 종속적 상대표정을 이용한 스테레오 영상의 기하구조 추정을 통해 모델 공간 상의 3차원 좌표를 계산하였으며, 이를 객체 공간 상의 좌표계로 변환함으로써 정량적인 3차원 정확도 분석을 수행하였다. 실험결과에서는 스테레오 모델의 수렴각이 약 $17^{\circ}$ 이상일 때, 상대적으로 높은 정확도를 갖는 3차원 정보가 생성됨을 확인하였다. 결과적으로 정확도 높은 3차원 정보 생성을 위해서는 촬영거리 및 기선거리를 고려하여 적절한 수렴각을 이루는 스테레오 모델 수립이 필요하다. 본 논문의 결과가 향후 모바일폰의 스테레오 영상을 이용한 입체영상 제작 및 3차원 객체 복원 등 관련 연구에 활용될 수 있을 것으로 기대된다.

• 한국태양에너지학회 논문집
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• 제39권4호
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• pp.1-9
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• 2019

Modules using 6 inch cells have problems with loss due to empty space between cells. To solve this problem made by shingled structure which can generate more power by utilizing empty space by increasing the voltage level than modules made in 6inch cell. Thus, in this paper, the c-Si cutting cells were produced using nanosecond green laser, and then the ECA was sprayed and cured to perform cutting cell bonding. Three types of ECA materials (B1, B2, B3) with Ag as the main component were used, and experimental conditions varied from 5 to 120 seconds of curing time, 130 to $210^{\circ}C$ of curing temperature, and 1 to 3 of curing numbers. As a results of experiments varying curing time, B1 showed efficiency 19.88% in condition of 60 seconds, B2 showed efficiency 20.15% in 90 seconds, and B3 showed efficiency 20.27% in 60 seconds. In addition, experiments with varying curing temperature, It was confirmed highest efficiency that 20.04% in condition of $170^{\circ}C$ with B1, 20.15% in condition of $150^{\circ}C$ with B2, 20.27% in condition of $150^{\circ}C$ with B3. These are because the Ag particles are densely formed on the surface to make the conduction path. After optimizing the conditions of temperature and curing time, the secondary-tertiary curing experiments were carried out. as the structural analysis, conditions of secondary-tertiary curing showed cracks that due to damp heat aging. As a result, it was found that the ECA B3 had the highest efficiency of 20.27% in condition of 60 seconds of curing time, $150^{\circ}C$ of curing temperature, and single number of curing, and that it was suitable for the manufacture of Solar cell of shingled structure rather than ECA B1 and B2 materials.