• 대한전기학회논문지
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• 제38권3호
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• pp.247-255
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• 1989

본 논문에서는 작업좌표에서 로보트 매니퓰레이터에 대해 적분 동작을 갖는 오차 모델과 극점배치 자기동조제어기를 제안하였다. 이 제어기는 로보트 동력학의 자세한 표현없이 부하 외란에 의한 자류편차를 제거할 수 있다. 오차 모델 배개변수는 반복 최소 자승 알고리즘에 의해 추정되고, 제어기 매개 변수는 극점 배치 방법에 의해 결정된다. 작업좌표에서 제안된 제어 계통의 성능을 평가하기 위하여 부하를 갖는 3개 관절 2개 링크의 공간 로보트 매니퓰레이터에 의해 컴퓨터 시뮬레이션을 하였다.

• 한국소음진동공학회논문집
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• 제14권7호
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• pp.577-585
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• 2004

In this paper, reactive shearing structural intensity method is extended to damping patches placement on outer panels of outdoor unit of air-conditioner to reduce its structural borne noise. The structural intensity is calculated from the normal velocities of structures that are measured by using a laser scanning vibrometer, and $textsc{k}$-space (wave-number domain) signal processing is used to obtain the spatial derivatives in formulation of structural intensity. This method is applied to the outdoor unit of air-conditioner on shaker-exciting mode and operating mode. and then damping patches are placed over area of high reactive shearing structural intensity for reducing the radiated noise. Experimental results show the largest reduction of sound pressure level of an outdoor unit by appling small damping patches to optimal position.

• 한국CDE학회논문집
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• 제20권4호
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• pp.348-356
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• 2015

It is important to devise methods for assisting dentists to consistently determine implant positions and directions and to accurately perform drilling tasks during dental implant surgery. In this paper, we propose a novel approach to tooth implant placement planning which deals with the determination of the positions and directions of multiple implant fixtures for a set of missing mandibular teeth and suggests the selection of the sizes and types of the implant fixtures. We combine Korean standard data in the sizes and positions of human teeth with the patient specific 3D models of mandibular jawbones, nerve curves, and neighboring teeth around the missing teeth in order to determine the positions and directions of the implant fixtures for the missing teeth. Using the geometric and spatial information of the jawbones, the teeth and the implant fixtures, we can construct the 3D models of surgical guide stents which are crucial to perform drilling tasks with ease and accuracy. Adopted in 3D simulation of dental implant placement, the approach can provide surgeon students with good educational contents. We also expect that, with further work, the approach can be used as a useful tool to plan for dental implant surgery.

• 한국측량학회지
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• 제33권2호
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• pp.83-94
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• 2015

최근 남북교류 협력사업과 통일에 대비한 각종 계획 및 정책 수립에 비접근 지역에 대한 공간자료의 필요성이 대두되고 있다. 이에 본 연구에서는 PLEIADES 영상과 TerraSAR 기준점을 활용하여 비접근 지역의 1/5,000 수치지형도 제작을 위한 기하보정의 허용오차 만족 가능성을 평가하였다. GPS 측량성과의 기준점 수량 및 배치를 변경해 가면서 기하보정을 수행하였고, 기하학적 배치와 안전성을 고려하여 5점을 활용하는 방안을 선정하였다. 선정된 위치에 TerraSAR 기준점을 확보하여 정확도를 평가한 결과, RMSE는 X=±0.64m, Y=±0.46m, Z=±0.28m였고, TerraSAR 기준점으로 PLEIADES 영상을 기하보정한 결과, RMSE는 X=±0.34m, Y=±0.27m, Z=±0.11m, 검사점에 대한 RMSE는 X=±0.50m, Y=±0.30m, Z=±0.66m임을 확인하였다. 본 연구 결과를 통해 비접근지역의 PLEIADES 영상과 최적의 TerraSAR 기준점을 확보하여 공간자료를 구축한다면 국내 항공삼각측량의 조정계산 및 오차한계의 1/5,000 수치지형도 제작 규정에 부합하는 고정밀 공간정보의 확보가 가능하다고 사료된다.

• International Journal of Internet, Broadcasting and Communication
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• 제9권3호
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• pp.1-8
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• 2017

Recently, the development of the head mounted display (HMD) device has attracted a great deal of attention to the actual contents. Especially, Augmented Reality (AR), which is a mixture of actual information and virtual world information, is focused on. AR HMD is able to interact by arranging virtual objects in real space through spatial recognition using depth camera. In order to naturally mix virtual space with real space, it is necessary to develop a technology for realizing spatial mapping information with high accuracy. The purpose of this paper is to evaluate the optimal configuration of augmented reality application program by realizing accurate spatial mapping information when mapping a real space and an object placement environment using HoloLens. To do this, we changed the spatial mapping information in real space to three levels, which are the number of meshes used in cubic meters to scan step by step. After that, it was compared with the 3D model obtained by changing the actual space and mesh number. Experimental result shows that the higher the number of meshes used in cubic meters, the higher the accuracy between real space and spatial mapping. This paper is expected to be applied to augmented reality application programs that require scanning of highly mapped spatial mapping information.

• 한국산업정보학회:학술대회논문집
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• 한국산업정보학회 2001년도 춘계학술대회논문집:21세기 신지식정보의 창출
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• pp.318-324
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• 2001

In this paper we propose the adaptive scheme to place more search points as long as the operation tapability of the motion estimator in the video codec permits. And the proposed algorithm takes advantage of the intuitive fact that the quality of the decoded video is more degraded as the spatial frequency of the corresponding block is increased due to the augmentation of local minima per unit area. Thererore, we propose the scheme to enhance the quality by locating relatively more search points in the block with high frequency components by analyzing the spatial frequencies of the video sequence. As a result, the proposed scheme can adaptively place more search points possibly permitted by the motion estimator and guarantees better quality compared to the TSS and FS.

• 교육녹색환경연구
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• 제18권4호
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• pp.21-32
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• 2019

본 연구는 초·중 통합학교의 공간 구성 방향을 제시하고자 일본의 초·중 통합학교 형태인 의무학교 사례를 중심으로 공간 배치 특성을 분석하였다. 이를 통해 초·중학교 발달단계별 학급교실의 공간 구성과 배치 특성을 도출하였고, 초·중 통합 활용전용 공간과 공동 활용 교과교실을 도출하였다. 또한 초·중학교 급별 학년별 교과교실 연계 특성을 분석하여 바람직한 교과교실 배치 방안을 도출함으로써 국내 초·중 통합학교 공간 배치 구성 방향에 대한 기본 방향을 제시하였다.

• 한국실내디자인학회논문집
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• 제15권6호
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• pp.11-18
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• 2006

Ceaseless studies and efforts to verify today's Korean nature that has advanced into digital era of 21C are continued. At this point of time, it is required to look back our heritage in diverse points of view free from theoretical and formal studies on our traditional spaces. Phenomenology, which is rising as the important theme in recent modem Western philosophy, suggests interesting analyses from this standpoint. This study is intended to analyze Korea's traditional residents 'Dok Rak Dang' based on Marleau-Ponty's phenomenology, and explore phenomenological spatial principle and new point of view implied in it. Particularly, Marleau-Ponty's phenomenology is the philosophy that shows intersubjective and involved relations between space and human, and intended to accept coincidental incidents occurred by human's action truthfully as they are. With three spatial concepts of direction, depth, and movement in Ponty's phenomenology, and placement nature of the earth that intercombine with human's body who is subject of these three concepts as analyze tool, Korea's traditional residents, 'Dok Rak Dang' has been analyzed. More segmentalized analyses have been deduced, and principle of phenomenology, that perceptions such as direction, depth, movement, etc are working synthetically to be accepted as essence of experiences could also be found in Dok Rak Dang.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제30권2호
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• pp.23-34
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• 2024

Purpose: The Hybrid care environment, combining interventional procedures and surgeries in one space, is crucial for managing complex diseases, responding to emergencies, and reducing recovery times and pain. This study provides foundational data for creating architectural guidelines for a Hybrid Operating Unit in a general hospital's surgical department, focusing on cardiovascular care. Methods: The study analyzed the spatial and configuration types of the Vascular Angiography Unit and the Cardiac Operating Unit, which are the basic components of the Hybrid Operating Unit, through a literature review. Based on the initial research findings, interviews with experts were conducted. Results: In the Hybrid Operating Process, the study proposed spatial configuration alternatives that consider the positioning of medical staff and the types and arrangement changes of equipment, including Angiography, Heart-lung machines, and other surgical tools and instruments. Implications: The integration of the two units leads to increased diversity and demand for medical staff, equipment, and supplies during surgical and interventional procedures. Therefore, strategic spatial configurations and equipment placement are necessary to effectively respond to these needs.

• 한국지진공학회논문집
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• 제7권4호
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• pp.81-87
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• 2003

본 논문에서는 Shannon의 샘플링 이론을 이용하여 제한된 수의 센서에서 얻은 모드형상으로 정확한 모드형상을 재생성하고, 이렇게 재생성한 모드형상을 이용하여 구조물에 발생한 손상을 탐지할 수 있는지의 가능성에 대해 조사하였다. 우선 시간 영역에서의 Shannon의 샘플링 이론을 검토하였고, 이를 공간영역으로 확대하였다. 공간영역으로 확대한 Shannon의 샘플링 이론은 그 효용성을 확인하기 위하여 단순보의 모드형상을 해석적으로 구한 후 최소한으로 제한된 수의 샘플 데이터로 모드형상을 재생하였고 이를 원래의 모드형상과 비교하였다. 이렇게 하여 얻은 결과를 바탕으로 구조물의 모드형상을 추출하는 동적실험에서 필요한 최적 가속도계의 위치를 구할 수 있는 간단한 관계식을 제안하였다. 제안된 관계식과 공간영역으로 확대한 Shannon의 샘플링 이론의 실용성은 연속 2스팬으로 구성된 실험실 빔 구조물의 손상 전과 후의 모드형상에 적용하여 손상을 탐지함으로써 입증하였다.