• Annual Conference of KIPS
• /
• 2022.11a
• /
• pp.210-212
• /
• 2022

4차 산업혁명의 시대적 요구에 따라 스마트워크, 원격진료, 메타버스 등 원격 접속 기반의 사회 인프라 환경이 확산되고 있으며, 코로나19는 이와 같은 원격접속 환경을 가속화하였다. 원격 접속 환경에서는 공간, 시간, 단말 등의 제약으로부터 비교적 자유롭게 기업 내부의 중요 자원 및 서비스를 이용할 수 있기 때문에 노동 생산성을 증대시킨다는 이점은 있으나, 충분히 검증받지 않은 작업 환경이기 때문에 보안적 측면에서는 문제를 야기시킬 수 있다. 또한 전통적인 정보보호 관리체계에서는 원격접속 환경은 허용하지 않거나 최소화한다는 기본 사상을 바탕으로 설계되어 있기 정보보호 전략적 한계가 존재한다. 본 논문에서는 이와 같은 정보보호 전략적 한계를 개선하기 위해 제로 트러스트 아키텍처 기반의 정보보호 관리체계 구축에 대한 방안을 제언한다.

• Archives of design research
• /
• v.19 no.4 s.66
• /
• pp.71-80
• /
• 2006

Collaboration has become essential in the product design process due to internationalized and specialized business environments. This study presents a real-time collaborative 3D design workspace for distributed designers, focusing on the development and the evaluation of new interaction techniques supporting nonverbal communication such as awareness of participants, shared manipulation and tele-presence. Requirements were identified in terms of shared objects, shared workspaces and awareness through literature reviews and an observational study. An Augmented Reality based collaborative design workspace was developed, in which two main interaction techniques, Turn-table and Virtual Shadow, were incorporated to support shared manipulation and tele-presence. Turn-table provides intuitive shared manipulation of 3D models and physical cues for awareness of remote participants. Virtual shadow supports natural and continuous awareness of location, gestures and pointing of partners. A lab-based evaluation was conducted and the results showed that interaction techniques effectively supported awareness of general pointing and facilitated discussion in 3D model reviews. The workspace and the interaction techniques can facilitate more natural communication and increase the efficiency of collaboration on virtual 3D models between distributed participants (designer-designer, engineer, or modeler) in collaborative design environments.

• Annual Conference of KIPS
• /
• 2013.11a
• /
• pp.1621-1623
• /
• 2013

원자력발전소를 비롯한 여러 산업플랜트들은 복잡한 파이프 시스템들이 필수적으로 필요한데, 이러한 파이프들 중 일부 파이프들은 안전성과 중요성을 고려하여 Over-haul 기간이나 가동 중에도 반드시 안전성 검사를 수행해야한다. 이 검사에는 검사자의 작업 공간 확보 어려움과 고위험 지역에 따른 작업환경으로 인하여 로봇을 이용한 검사 방안이 요구되고 있다. 본 논문에서는 파이프 등반 로봇을 개발함에 있어 영상을 이용한 파이프 자동 파지 기술과 로봇 원격제어 기술개발에 대하여 기술한다.

• Journal of Advanced Marine Engineering and Technology
• /
• v.37 no.4
• /
• pp.399-403
• /
• 2013

Mining diggers have been substituted with the robots for the mining works in dangerous and narrow tunnel, and those demands are increased in nowadays. In this study, experimental research on the remote controlled robots to perform after the development of the robot. According to the test results, performances of the developed robot and its working devices have been modified several times. It has been considered that the robot keeps its optimum performance in states as follows; driving speed 1.0 km/h, crawl angle $10^{\circ}$, spiking cycle 500bpm and breaking power $30kg_fm$. And also it has been found that sufficient cooling for the robot's working parts is essential to extend those working periods longer than 3 hours steadily under rating condition.

• Journal of Digital Contents Society
• /
• v.5 no.1
• /
• pp.22-27
• /
• 2004

To handle the high level radioactive materials such a spent fuel, the master-slave manipulaters (MSM) are wide1y used as a remote handling device in nuclear facilities such as the hot cell with sealed and shielded space. In this paper, the Digital Mockup which simulates the remote operation of the Advanced Conditioning Process(ACP) is developed. Also, the workspace and the motion of the slave manipulator, as well as, the remote operation task should be analyzed. The process equipment of ACP and Maintenance/Handling Device are drawn in 3D CAD model using IGRIP. Modeling device of manipulator is assigned with various mobile attributes such as a relative position, kinematics constraints, and a range of mobility. The 3D graphic simulator using the extermal input device of spare ball displays the movement of manipulator. To connect the exterral input device to the graphic simulator, the interface program of external input device with 6 DOF is deigned using the Low Level Tele-operation Interface(LLTI). The experimental result show that the developed simulation system gives much-improved human interface characteristics and shows satisfactory reponse characteristics in terms of synchronization speed. This should be useful for the development of work`s education system in the environment.

• Korean Journal of Remote Sensing
• /
• v.17 no.1
• /
• pp.57-69
• /
• 2001

This study propose a image processing system of unsupervised analysis. This system integrates low-level segmentation and high-level classification. The segmentation and classification are conducted respectively with and without spatial constraints on merging by a hierarchical clustering procedure. The clustering utilizes the local mutually closest neighbors and multi-window operation of a pyramid-like structure. The proposed system has been evaluated using simulated images and applied for the LANDSATETM+ image collected from Youngin-Nungpyung area on the Korean Peninsula.

• Proceedings of the Korean Information Science Society Conference
• /
• 2004.04b
• /
• pp.70-72
• /
• 2004

SIMS는 공간 정보 관리 환경을 지원하기 위한 통합 관리 시스템으로서 다양한 공간 및 비공간 자료를 관리하고 여러 응용작업을 지원한다. 본 논문에서는 기존의 공간 데이터 마이닝 질의 언어가 처리하는 공간자료에 한정되지 않고, 자동 데이터 수집, 인공위성 측위 서비스, 원격탐사, GPS, 모바일 컴퓨팅 등의 다양한 자료라 시공간(Spatio-Temporal) 자료로부터 유용한 정보를 발견 할 수 있도록 SIMS를 기반으로 한 공간 데이터 마이닝 전용 시스템을 지원하는 공간 데이터 마이닝 질의 언어를 설계하였다.

• Proceedings of the KSRS Conference
• /
• 2007.03a
• /
• pp.82-87
• /
• 2007

웹 GIS 서비스는 웹의 구현기술을 기존의 GIS와 결합하여 Internet 또는 Intranet 환경에서 지리정보의 입력，수정，조작， 분석，출력 등의 작업을 처리하여 네트워크 환경에서 서비스를 제공할 수 있도록 구축된 시스템을 말한다. 웹 GIS 서비스의 구현은 단순히 지리공간 자료를 보여주는 일반적인 형태의 응용에서부터 공간 분석을 수행하여 의사결정에 도움을 줄수 있는 응용시스템까지 다양한 구현이 가능하다. 웹 GIS 서비스는 많은 GIS 표준 명세 규칙인 필수 사항과 옵션 사항으로 구분되어 있으며 종종 동일한 표준을 지원한다 할지라도 상호 연동을 위한 인터페이스를 지원하지 않아 서비스의 확장이 어렵다. 본 연구는 이러한 단점을 보완하기 위하여 향후의 웹 GIS 응용 서버 확장에 필요한 국제표준 및 기술을 고려하여 웹 서비스를 구성하여 이들을 재사용 재조합 하기 위한 인터페이스를 구축하였다. 또한 이를 기반으로 Ajax 기법이 적용된 비동기식 호출을 사용하여 Client 환경에서 최적의성능을 발휘하는 방안을 소개하였다.

• Proceedings of the Korean Radioactive Waste Society Conference
• /
• 2003.11a
• /
• pp.388-394
• /
• 2003

To handle the high level radioactive materials such a spent fuel, the master-slave manipulators (MSM) are widely used as a remote handling device in nuclear facilities such as the hot cell with sealed and shielded space. In this paper, the Digital Mockup which simulates the remote operation of the Advanced Conditioning Process(ACP) is developed. Also, the workspace and the motion of the slave manipulator, as well as, the remote operation task should be analyzed. The process equipment of ACP and Maintenance/Handling Device are drawn in 3D CAD models using IGRIP. Modeling device of manipulator is assigned with various mobile attributes such as a relative position, kinematics constraints, and a range of mobility, The 3D graphic simulator using the external input device of space ball displays the movement of manipulator. To connect the external input device to the graphic simulator, the interface program of external input device with 6 DOF is deigned using the Low Level Tele-operation Interface(LLTI). The experimental result shows that the developed simulation system gives much-improved human interface characteristics and shows satisfactory response characteristics in terms of synchronization speed. This should be useful for the development of work's education system in the virtual environment.

• Journal of KIISE:Computing Practices and Letters
• /
• v.15 no.8
• /
• pp.525-533
• /
• 2009

Staging technique is used to provide files for a job in the Grid. If a staged file has large volume, the start time of the job is delayed and the throughput of job in the Grid may decrease. Therefore, removal of staging overhead helps the Grid operate more efficiently. In this paper, we present two methods for efficient file provisioning to clear the overhead. First, we propose RA-RFT, which extends RFT of Globus Toolkit and enables it to utilize RLS with replica information. RA-RFT can reduce file transfer time by doing partial transfer for each replica in parallel. Second, we suggest Remote Link that uses remote I/O instead of file transfer. Remote link is able to save storage of computational nodes and enables fast file provisioning via prefetching. Through various experiments, we argue that our two methods have an advantage over existing staging techniques.