• Title/Summary/Keyword: 현장기술서

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Highly Efficient Checklist for the Safety Management of Reinforced Concrete construction (철근콘크리트 공사의 효율적 안전관리를 위한 체크리스트 제안에 관한 연구)

  • Shim, Un-Jun;Suh, Hyung-Suk;Ahn, Yong-Sun
    • Journal of the Korea Institute of Building Construction
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    • v.10 no.6
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    • pp.7-17
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    • 2010
  • Modern construction technology has been highly systemized, which has simplified the construction methods applied to construction sites. However, on reinforced concrete construction sites, there have recently been many new disasters, and these have been bigger than before due to the heavy dependency on manpower. This study investigates the cause and cases of disasters during reinforced concrete construction. In addition, the study surveyed the psychological condition of construction site personnel in relation to the safety awareness and the causes of disasters, while deriving the basic components related to disasters on construction sites in order to analyze the relationship between each component to suggest an efficient safety management measures checklist. Construction site personnel should utilize the results drawn from this study as a disaster prevention tool to use in a safety education class, and not consider this simply as statistical data, but as a checklist to ensure full awareness of the appropriate priorities for safety categories to utilize in the reinforced concrete construction in order to execute reasonable safety management.

A Study on a CMS Platform for AR-based Remote Collaboration in a Smart Factory (스마트 팩토리에서의 AR 기반 원격 협업을 위한 CMS 플랫폼에 관한 연구)

  • LIm, Hwang-Yong;Ro, Kwang-Hyun
    • Journal of Digital Convergence
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    • v.16 no.12
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    • pp.327-334
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    • 2018
  • This study proposes a CMS platform for AR-based remote collaboration in a smart factory. The Smart Factory site utilizes various forms of AR technology to save time and money. As the level of smart factory increases, system-oriented tasks such as machinery and equipment are performed in people-oriented work. Therefore, there is a need for a system that allows the operator to immediately repair the machine or equipment in case of a failure, or to get help if necessary. Remote collaborative CMS platform is designed to work in conjunction with DATABASE of ERP, MES / POP, and PLM system built through text, 2D 3D contents and smart factory business, This study is meaningful in that it saves time and cost by sharing information such as management, repair method, manual, etc., and repairing it quickly.

Multi-Channel Audio Coding Technologies (멀티채널 오디오 (MPEG-2) 부호화 기술)

  • Hong, J.W.
    • Electronics and Telecommunications Trends
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    • v.10 no.3 s.37
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    • pp.15-27
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    • 1995
  • 멀티미디어에서 비디오의 품질이 향상되고, 디지털 텔레비젼 (ADTV)이나 고선명 텔레비젼(HDTV) 등의 개발에 의해 화면 크기가 증가하면서 이에 어울리는 실감있는 오디오의 전송 및 재생이 요구된다. 따라서 멀티채널 오디오의 도입과 더불어 효율적이고, 경제적인 방법으로 낮은 비트율로 고품질의 멀티채널 오디오를 제공하기 위한 부호화 기술이 필요하게 된다. 최근에 인간의 청각 특성을 고려한 심리음향 모델을 이용한 멀티채널 오디오의 압축 부호화 기술이 MPEG-2 오디오의 국제 표준으로 제정되었다. MPEG-2 오디오 표준은 MPEG-1 오디오 표준을 기초로 하여 현장감을 필요로 하는 오디오를 위해 기본 스테레오 채널외에 중앙채널, 서라운드 채널, 그리고 저주파 효과채널을 부가한 방식으로 다채널, 음성다중 등의 부가서비스를 제공하기에 적합하다. 본고에서는 MPEG-2 오디오 표준의 계층 II를 중심으로 한 표준의 특징, 알고리즘, 데이터 구조, 그리고 응용분야 등에 대해 기술한다.

Identifying Eco-corridor Location for Reconnecting Freagmented Forests Using Remote Sensing Techniques (원격탐사기술을 이용한 절편화된 산림 연결 생태통로 위치 파악)

  • Ahn, Seung-Mahn;Lee, Kyoo-Seock
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.6 no.5
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    • pp.1-8
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    • 2003
  • 산림의 절편화 및 마식은 단순한 녹지면직의 축소만이 아니라 아생동물의 이동통로 단절로 인한 서식시 축소 및 니아가서는 소멸을 초래한다. 이를 해결하고자 최근에는 생태통로를 조성하는 작업이 수행되고 있으며 이는 목표종의 신정 및 적절한 위치 선정을 필요로 한다. 본 연구에서는 대전광역시와 그 주변을 대상으로 지난 50년 동안 인간 활동에 의해 절편화된 녹지를 파악하고자 원격탐사(RS) 자료를 이용하였다. Landsat MSS(30m)나 TM(79m)과 같은 중저해상도 위성영상으로는 절편화를 야기하는 산림 절편화 및 마식 파악이 어려워 본연구에서는 발행한 수치지도 및 수치토지이용도를 이용하여 1954년, 2000년 각각의 삼림분포도를 작성하였다. 현지 확인 및 수정과정을 거쳐 최종적으로 생성된 자료를 근거로 산림 절편화 및 마식의 정도를 정량적으로 기술 및 평가하였고 녹지(patch)의 크기와 현장 조사한 야생동물서 식도를 바탕으로 생태통로의 위치를 도출하였다.

Introduction of AI digital textbooks in mathematics: Elementary school teachers' perceptions, needs, and challenges (수학 AI 디지털교과서의 도입: 초등학교 교사가 바라본 인식, 요구사항, 그리고 도전)

  • Kim, Somin;Lee, GiMa;Kim, Hee-jeong
    • Education of Primary School Mathematics
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    • v.27 no.3
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    • pp.199-226
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    • 2024
  • In response to the era of transformation necessitating the introduction of Artificial Intelligence (AI) and digital technologies, educational innovation is undertaken with the implementation of AI digital textbooks in Mathematics, English, and Information subjects by 2025 in Korea. Within this context, this study analyzed the perceptions and needs of elementary school teachers regarding mathematics AI digital textbook. Based on a survey conducted in November 2023, involving 132 elementary school teachers across the country, the analysis revealed that the majority of elementary school teachers had a low perception of the introduction and need for mathematics AI digital textbooks. However, some recognized the potential for personalized learning and effective teaching support. Furthermore, among the core technologies of the AI digital textbook, teachers highly valued the necessity of learning diagnostics and teacher reconfiguration functions and had the most positive perception of their usefulness in math lessons, while their perception of interactivity was relatively low. These findings suggest the need for changing teachers' perceptions through professional development and information provision to ensure the successful adoption and use of mathematics AI digital textbooks. Specifically, providing concrete and practical ways to use the AI digital textbook, exploring alternatives to digital overload, and continuing development and research on core technologies.

A Study on the Conceptual Design of Quay Process Monitoring System (안벽공정 모니터링 시스템의 개념 설계에 관한 연구)

  • Kim, Ho-Kyeong;Ko, Dae-Eun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.10
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    • pp.426-431
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    • 2016
  • In quay processes in shipyards, it is difficult to manage workers and to maintain secure working environments because at least 1,000 people can occupy the quay at the same time. In this study, a system was designed to monitor the environment and processes of quay operation. In order to lower initial investments and the costs of maintenance and operation, the entire system consists of six connected components. Considering the communication environment of the shipyard site, Wi-Fi and the LoRa communication protocol were selected for the system. The feasibility of the communication protocols was verified by data transmission tests in the field. The designed system can provide real-time information about employees working in the quay area, the safety status of moored ships on the quay, and step-by-step alarms in dangerous situations based on the detected information. The system is expected to prevent or greatly reduce safety hazards.

Optical Character Recognition based Security Document Image File Management System (광학문자인식 기반 보안문서 이미지 파일 관리 시스템)

  • Jeong, Pil-Seong;Cho, Yang-Hyun
    • Journal of the Korea Convergence Society
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    • v.10 no.3
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    • pp.7-14
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    • 2019
  • With the development of information and communication technology, we have been able to access and manage documents containing corporate information anytime and anywhere using smart devices. As the work environment changes to smart work, the scope of information distribution is expanded, and more efforts are needed to manage security. This paper proposes a file sharing system that enables users who have smart devices to manage and share files through mutual cooperation. Proposed file sharing system, the user can add a partner to share files with each other when uploading files kept by spliting the part of the file and the other uses an algorithm to store on the server. After converting the file to be uploaded to base64, it splits it into encrypted files among users, and then transmits it to the server when it wants to share. It is easy to manage and control files using dedicated application to view files and has high security. Using the system developed with proposed algorithm, it is possible to build a system with high efficiency even for SMEs(small and medium-sized enterprises) that can not pay much money for security.

Design of Nuclear Power Plant Data Acquisition System (원전 Data Acquisition System 설계)

  • Jung, Chul-Hwan;Kim, Jung-Tak;Lee, Dong-Young;Ham, Chang-Shik
    • Proceedings of the KIEE Conference
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    • 1988.07a
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    • pp.253-256
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    • 1988
  • 원자력발전소의 운전현황감시 및 안전성확보를 위해 원전에 비상대응설비등을 설치 할려고 하는 상황에서 본 연구는 이런 원전설비 시스템의 입력단이 되는 DAS(Data acquisition System)를 설계, 제작하므로 원전설비에 대한 기술자립을 향상시켰다. 여기서 연구된 DAS는 현장신호를 격리 및 분리하고 analog와 digital 신호를 취득하며 Non Class-1E analog 80개, digital 신호 16개와 Class-1E analog 신호 2개, digital 신호 4개를 취급할수있도록 설계하였다. 여기서 설계된 DAS는 원전의 안전정보 system이나 기타 process의 monitoring system의 입력단으로 적용 가능한 시스템이다.

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Semantic Segmentation with Lightweight on Edge Computing for Patrol Robot in Outdoor Environment (험지 환경에서의 순찰 로봇을 위한 Edge Computing에서의 Semantic Segmentation 경량화)

  • Ye-Joong Yoon;In-Gu Choi;Hyungpil Moon
    • Proceedings of the Korea Information Processing Society Conference
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    • 2023.11a
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    • pp.1169-1170
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    • 2023
  • 본 논문에서는 험지 환경에서 순찰하는 모바일 로봇의 이동 가능성(traversability)을 수행하기 위해 로봇에 탑재되는 Jetson AGX Orin에서의 실시간 Semantic Segmentation을 달성하는 것을 목표로 하였다. 험지 환경을 위한 OFFSEG 모델을 활용하였으며, 다운샘플링, 파라미터 최적화 등 각종 경량화 기술을 적용하여 지연 시간을 단축시켰다. 또한 현장과 유사한 환경에서의 테스트를 통해 처리 시간을 목표로 하는 100ms에 근접한 시간으로 단축할 수 있었다.

Evaluation Technology of Degradation of Metallic Alloy using Electrical Resistivity (전기비저항을 이용한 금속합금 열화도 평가기술)

  • Nahm, Seung-Hoon;Yu, Kwang-Min;Ryu, Jae-Cheon
    • Journal of the Korean Society for Nondestructive Testing
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    • v.21 no.5
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    • pp.532-541
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    • 2001
  • Developments of nondestructive evaluation techniques for reduction of strength or toughness by aging of material have been carried out, and the method using electrical resistivity is one of them. In this study, to examine the application of electrical resistivity to the evaluation of degradation of metallic alloy, ten different non-magnetic materials were selected as test materials. Electrical resistivities measured by DC two-point probe method and those measured by non-contact type eddy current method were compared with each other. In addition, to examine the application possibility of four-point probe technology in field, the electrical resistivities for 1Cr-lMo-0.25V steel measured by DC two-point probe method and four-point probe method were compared with each other Differences between two measured values for the 1Cr-1Mo-0.25V steel were 0.6%. Therefore, the four-point probe method can be applied to the estimation of the degradation of metallic alloy. ect.

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