• 환경영향평가
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• 제9권4호
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• pp.277-290
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• 2000

The purpose of this study is to identify the problems of environmental impact assessment(EIA) and to suggest new EIA technology. The problems of EIA in Korea can be summarized as follows. First, the EIA does not reflect the impact of policy, plan and program on environment. Second, the project EIA does not consider the cumulative impacts such as additive impacts, synergistic impacts, threshold/saturation impacts, induced and indirect impacts, time-crowded impacts, and space-crowded impacts. Third, the EIA techniques in Korea are not standardized. Finally, the present EIA suggests only alternatives to reduce adverse impacts. To solve above-mentioned problems, the development of new EIA technology is essential. First, the new EIA technology should be developed toward pollution prevention technology and comprehensive and integrated environmental management technology. Second, new fields of EIA for pollution prevention contain strategic environmental assessment, cumulative impacts assessment, socio-economic impact assessment, cyber EIA and EIA technology necessary after the reunification of Korean Peninsula. Third, EIA technology for integrated environmental management contains the development of integated environment assessment system and the development of packaged EIA technology. The EIA technology for integrated environmental assessment system contains (1) development of integrated impact assessment technology combining air/water quality model, GIS and remote sensing, (2) integrated impact assessment of EIA, traffic impact assessment, population impact assessment and disaster impact assessment. (3) development of integrated technology combining risk assessment and EIA (4) development of integrated technology of life cycle assessment and EIA, (5) development of integrated technology of spatial planning and EIA, (6) EIA technology for biodiversity towards sustainable development, (7) mathematical model and GIS based location decision techniques, and (8) environmental monitoring and audit. Furthermore, there are some fields which need packaged EIA technology. In case of dam development, urban or industrial complex development, tourist development, landfill or combustion facilities construction, electric power plant development, development of port, road/rail/air port, is necessary the standardized and packaged EIA technology which considers the common characteristics of the same kind of development project.

• 한국지능시스템학회논문지
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• 제21권2호
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• pp.212-217
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• 2011

본 논문에서는 미래 지능형 빌딩 시스템에서 요구되는 다양한 상황을 인지할 수 있는 지능형 디지털 통합 전관 방송 시스템을 개발하였다. 화재와 재난과 같은 응급 상황이 발생할 때 울리는 경보음을 인식할 수 있으며, 실내 온도와 습도 및 환경 오염도와 같은 다양한 센서 출력을 전달 받아 지능적으로 상황에 맞는 대처 방안을 필요한 곳에 개별적으로 방송할 수 있는 지능형 디지털 통합 전관 방송 시스템을 개발하였다. 외부 입력, 마이크, CD와 MP3 및 라디오 기능 등을 일체형으로 통합하고 소형화한 디지털 전관 방송 시스템을 개발하고 있으며, 시스템이 중앙 집중 제어가 가능하도록 운용 MICOM을 개발하였다. 중앙 집중 제어를 수행하기 위해 운용 MICOM은 제어 계층, 처리 계층 및 사용자 인터페이스 계층인 3계층으로 구성된다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.770-773
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• 2005

In most biological laboratory, sequences from sequence machine are stored into file disks as simple files. It will be hard work to store and manage the sequence data with consistency and integrity such as storing redundant files. It is required needed to develop a system which integrated and managed genome data with consistency and integrity for accurate sequence analysis. There fore, in this paper, we not only store gene and protein sequence data through sequencing but also manage them. We also make a integrate schema for transforming the file formats and design database system using it. As integrated schema is designed as a BSML, it is possible to apply a style language of XSL. From this, we can transfer among heterogeneous sequence formats.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 22-24 Oct. 1991
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• pp.809-814
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• 1991

기존의 CNC Controller를 재구성하면 제어성과 절삭성의 재고에 큰 효과를 낼 수 있다. 현실적으로 시스템의 재구성은, 가) 시스템의 재구성으로 2축 CNC 기계를 다축으로 전환시킬 수 있고, 나) 모터의 직접제어에 의한 G-code 작성과정의 생략이 가능하며, 다) NC 동작의 제어가 소프트웨어로 (C 언어) 이루어 지기 때문에 사용자환경에 맞도록 고객화가 가능한 강점이 있다. 나아가서는 형상의 정의에서 NC 기계동작의 제어 및 온라인 모니터링에 이르는 전과정을 소프트웨어로 일식화 시킬 수 있는 통합 NC 시스템의 구현이 가능하다. 본 논문에서는 이러한 목적으로 연구되고 있는 INCS(Integrated NC System)의 개발현황을 소개한다. INCS는 PC-286, NC Controller, Drive Amplifier, Sensing Device의 하드웨어 시스템과 CAD, CAM 및 CNC 기능을 수행하는 소프트웨어 시스템으로 구성되어 있다. 그래픽 시뮬레이션 및 실제 절삭을 통하여 개발된 방식의 유효성과 효율성을 설명한다.

• Smart Structures and Systems
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• 제3권3호
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• pp.321-340
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• 2007

Structural control technologies have attracted great interest from the earthquake engineering community over the last few decades as an effective method of reducing undesired structural responses. Traditional structural control systems employ large quantities of cables to connect structural sensors, actuators, and controllers into one integrated system. To reduce the high-costs associated with labor-intensive installations, wireless communication can serve as an alternative real-time communication link between the nodes of a control system. A prototype wireless structural sensing and control system has been physically implemented and its performance verified in large-scale shake table tests. This paper introduces the design of this prototype system and investigates the feasibility of employing decentralized and partially decentralized control strategies to mitigate the challenge of communication latencies associated with wireless sensor networks. Closed-loop feedback control algorithms are embedded within the wireless sensor prototypes allowing them to serve as controllers in the control system. To validate the embedment of control algorithms, a 3-story half-scale steel structure is employed with magnetorheological (MR) dampers installed on each floor. Both numerical simulation and experimental results show that decentralized control solutions can be very effective in attaining the optimal performance of the wireless control system.

• Nuclear Engineering and Technology
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• 제56권9호
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• pp.3491-3500
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• 2024

In this work, the hybrid vibro-acoustic model reduction technique that is a physical-modal combined formulation is proposed to accelerate the finite element model updating process of the vibro-acoustic pipeline system. Particularly, the new formulation could provide an effective way of the model updating by preserving the physical DOFs for the direct calibration of the undetermined boundary conditions. The sensitivity based vibro-acoustic model updating is first conducted, and then the undetermined spring constant at the displacement boundary condition is then directly and effectively calibrated by using the proposed hybrid model reduction formulation. The proposed method is implemented in the real nuclear facility to evaluate its performance. In addition, an experimental implementation test using the inverse force identification process is also conducted to demonstrate the reliability of the generated vibro-acoustic FE model through the proposed method.

• Journal of Biosystems Engineering
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• 제41권4호
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• pp.408-417
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• 2016

Purpose: Yield monitoring systems are an essential component of precision agriculture. They indicate the spatial variability of crop yield in fields, and have become an important factor in modern harvesters. The objective of this paper was to review research trends related to yield monitoring sensors for grain crops. Methods: The literature was reviewed for research on the major sensing components of grain yield monitoring systems. These major components included grain flow sensors, moisture content sensors, and cutting width sensors. Sensors were classified by sensing principle and type, and their performance was also reviewed. Results: The main targeted harvesting grain crops were rice, wheat, corn, barley, and grain sorghum. Grain flow sensors were classified into mass flow and volume flow methods. Mass flow sensors were mounted primarily at the clean grain elevator head or under the grain tank, and volume flow sensors were mounted at the head or in the middle of the elevator. Mass flow methods used weighing, force impact, and radiometric approaches, some of which resulted in measurement error levels lower than 5% ($R^2=0.99$). Volume flow methods included paddle wheel type and optical type, and in the best cases produced error levels lower than 3%. Grain moisture content sensing was in many cases achieved using capacitive modules. In some cases, errors were lower than 1%. Cutting width was measured by ultrasonic distance sensors mounted at both sides of the header dividers, and the errors were in some cases lower than 5%. Conclusions: The design and fabrication of an integrated yield monitoring system for a target crop would be affected by the selection of a sensing approach, as well as the layout and mounting of the sensors. For accurate estimation of yield, signal processing and correction measures should be also implemented.

• 대한원격탐사학회지
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• 제38권5_3호
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• pp.819-834
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• 2022

인공지능 기법들은 특히 영상분류(image classification), 객체탐지(object detection), 영상분할(image segmentation)에 효과적으로 사용되고 있다. 특히, 딥러닝(deep learning)은 최근 컴퓨팅 파워의 증대와 함께 깊고 두터운 네트워크 구성이 가능해지고 보다 효율적인 활성함수(activation function)와 옵티마이저(optimizer)를 활용한 특징맵(feature map)의 생성을 통해 상당히 높은 정확도를 도출할 수 있다. 본고에서는 최근 다양한 원격탐사 분야에서 활용성이 확대되고 있는 딥러닝 영상인식 기법인 Convolutional Neural Network (CNN) 기반 모델 및 Transformer 기반 모델에 대한 기술동향 및 사례연구를 검토하고, 우리나라에서 이들 기법의 활용방안 및 발전방향 등을 제시하고자 한다. 향후 원격탐사 기반의 재난 상황 대응을 위해서는 위성영상의 적시성 확보와 실시간 딥러닝 처리, 그리고 위성, 드론 및 Closed-circuit Television (CCTV) 영상이 함께 활용되는 영상 빅데이터 플랫폼도 개발되어야 할 것이다.

• 한국인공지능학회지
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• 제6권1호
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• pp.1-10
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• 2018

Compressed Air is an important energy source used in most factories nowadays. The automation trend using air compressor has been gradually increasing with the interest of the 4th industry in recent years. With the air compressor system, it is possible to construct the device at low cost and easily achieve automation and energy saving. In addition, With trend of FA, miniaturation and light weight manufacturing trend expand their use in the electronics, medical, and food sectors. Research method is to design the technology for the remote control of the following information as USN base. Development of flexible sensing module from real time observation module for fusion of IT technology in compressed air systems, design and manufacture of flexible sensing module, and realiability assessment. Design of real-time integrated management system for observation data of compressed air system - Ability to process observation data measured in real time into pre-processing and analysis data. This study expects unconventionally decreasing effect of energy cost that takes up 60~70% of air compressor layout and operation and maintenance management cost through USN(Ubiquitous Sensor Network) technology by using optimum operational condition from real time observation module. In addition, by preventing maintenance cost from malfunction of air compressor beforehand, maintenance cost is anticipated to cut back.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.292-294
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• 2021

디지털 트윈 기반 스마트 파이프 통합 관리 시스템은 자기진단 및 상태 감시 기능 센서 기능이 있는 수로 파이프를 지하에 매설하여, 이로부터 데이터를 전송받아 효율적인 운영 및 감시를 위한 통합 솔루션으로 스마트한 의사결정을 통하여 지하 상하 수도관을 혁신적으로 운영할 수 있는 시스템이다. 원격제어및 모니터링이 주요한 기능의 하나이기 때문에 어떻게 실시간으로 모니터링을 구성할 것인가 하는 사안은 중요한 이슈이다. 우리는 이를 위하여 특별한 실시간 기반의 에이전트 기능을 설계하였다. 본 논문에서는 이러한 이슈를 해결하기 위하여 센서 데이터들을 주고받는 전송 포인트를 기준으로 계층적 구조(Layered Architecture)를 제안하였다. 각각의 계층들에는 에이전트를 위치시키어 하위 계층을 바라보고 센서의 변화가 있는지를 실시간으로 주기적 감시를 진행하도록 하였다. 이에 대한 에이전트 시스템을 설계하고 개념모델 수준의 구현을 진행하여 우수성을 검증하였다.