• 조명전기설비학회논문지
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• 제29권6호
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• pp.90-95
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• 2015

This paper proposes the new adaptive gain control monitoring sensor for the marine IT system. The marine IT system sensors make it possible to conduct search missions, record climate changes, provide pollution control, study marine life, conduct survey missions, tactical surveillance, and predict natural disturbances in the ocean. In this paper, the adaptive gain control circuit which changes its parameters according to the ambient noise situation for obtaining the precise location information of marine IT system sensor is developed and analyzed. The performance characteristics for ensuring the precise location information of marine system sensor is presented and analyzed. The theoretical and experimental studies have been carried out. The presented results from the above investigation show considerably excellent performance for the monitoring of the marine system.

• 농촌계획
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• 제16권4호
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• pp.45-51
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• 2010

The purpose of this study is on monitoring complementary forest of village according to restoration project. Accordingly, this study was accomplished in case of Dubang complementary forest of village in Wanju-gun which was indicated as beautiful village forest by Korean government. This study describes the restoration project and identifies the change of species diversity and succession through monitoring. For this, vegetational survey was performed in 2003 and 2010. D(Dominant degree) and S(Sociability degree) was measured by Brown-Blanquet's method. The results demonstrate significant increase of species diversity and progress of natural succession. It means ecological structure and function have improved. Also ecological disturbance appears here and there on account of insufficient management.

• 한국태양에너지학회 논문집
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• 제38권4호
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• pp.11-31
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• 2018

Nowadays, domestic photovoltaic system market has been expanded and the governmental dissemination policy has been continued. There is only PV system output performance analysis which is called Performance Ratio(PR) analysis. However, there exists many parameters that can affect PV system output. This papers shows the PV system energy performance analysis using meteorological monitoring data. The meteorological monitoring system was installed in the H university and we analyzed the PV system which installed in the H university. We also investigated other three PV systems which located less than 3 kilometers from H university. We evaluated total 4 PV systems through the field survey data, design drawing data and power generation data. Finally, we compared the actual measuring data with the simulation data using PVSYST software.

• 지구물리와물리탐사
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• 제21권1호
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• pp.8-14
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• 2018

저수지 제체에 대한 자연재해 피해를 예방하고 보수 및 보강대책을 수립하기 위해서 각종 계측기와 재해예방 전기비저항 모니터링 시스템을 설치하여 관리하고 있다. 대부분 30년 이상으로 노후화된 저수지는 농업용 관개에 따른 구조적인 취약성을 가지고 있다. 계측 및 모니터링 목적은 저수지의 안전성과 견고성을 확보하는데 있는데, 전기비저항탐사는 결함 부위, 침투수 이상대 및 제체 내 세굴현상 등과 같은 잠재적인 취약성 파악이 가능하다. 국내 한 저수지 제체 댐마루에 설치된 전기비저항 자동계측시스템을 통하여 매일 6시간 간격으로 저장된 연간 모니터링 자료를 이용하여, 제체 내 침투수 영향을 파악하였다. 연간 저수위 변화는 10m 정도인데, 영농기 취수에 따른 저수위 변화는 제체 내 물성변화를 야기한다. 모니터링 자료 해석 결과, 비저항 값은 연간 저수위 및 계절영향 이외에 대체로 안정적이었다. 또한, 제체 내 취수시설 주변의 취약성 고찰을 위해서 단순화된 모델을 구성하여 모델링을 수행하였다. 그 결과 전기비저항 모델 반응 계산을 통한 복통구조물 주변 침투수 구간의 탐지가 가능함을 확인하였다.

• 대한의용생체공학회:의공학회지
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• 제42권3호
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• pp.86-93
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• 2021

Purpose: The purpose of this study is to find out the cognizance of medical device safety information (MDSI) monitoring in the hospital and oriental hospital workers, and the different aspect of MDSI between oriental medical devices and medical devices. Methods: The survey was performed both in the oriental medicine hospital and general hospital. The survey had 16 items; 2 items basic questions, 5 items in the awareness of MDSI, 5 items in the education of MDSI, 4 items in the necessity of defining oriental medical devices and differences between general and oriental medical devices. A total of 120 hospital worker were participated; 60 oriental medicine hospital workers and 60 general hospital workers. They had worked in the oriental medicine or general hospital associated with 'Medical Device Safety Monitoring Center, Dongguk University Ilsan Hospital' in 2019 and 2020. Results: The cognizance of MDSI was high both in oriental medicine hospital and general hospital workers and there were no significant differences between oriental medicine and general hospital workers. When we divided the hospital workers into the senior workers who had worked for over 3 years and junior workers for less than 3 years, the senior workers had higher awareness of MDSI than junior workers. However, the cognizance of education of MDSI was high which was not different between senior and junior workers. Both hospital workers thought that it was necessary to define oriental medicine device legally and the oriental medical device might have low risk and less side effect than medical device. Conclusion: The cognizance of MDSI was high and there was no significant differences between oriental medicine and general hospital workers. Because the senior hospital workers had higher recognition of MDSI, we need to provide the continuous education program for junior hospital workers. Although oriental medical device are thought to be safer than medical device, we need to have a legal definition.

• 한국도로학회논문집
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• 제17권3호
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• pp.69-76
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• 2015

PURPOSES : Performance evaluation of four types of asphalt concrete overlays for deteriorated national highways. METHODS : Pavement distress surveys for crack rate and rut depth have been conducted annually using an automated pavement survey vehicle since 2007. Linear and non-linear performance prediction models of the asphalt concrete overlays were developed for 43 sections. The service life of the asphalt overlays was defined as the number of years after which a crack rate of 30% or rut depth of 15mm is observed. RESULTS : The service life of the asphalt overlays was estimated as 17.4 years on an average. In 90.7% of the sections, the service life of the overlays was 15 years or more which is 1.5 times the life of conventional asphalt concrete overlays used in national highways. The performance of the overlays was dependent on the type of asphalt mixture, traffic volume levels, and environmental conditions. CONCLUSIONS : The usage of stone mastic asphalt (SMA) and polymer-modified asphalt (PMA) for the overlays provided good resistance to cracking and rutting development. It is recommended that appropriate asphalt concrete overlays must be applied depending on the type of existing pavement distress.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2000년도 추계학술대회 논문집
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• pp.65-66
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• 2000

남극은 지리적인 원거리성과 혹독한 자연환경 등으로 문명에 의한 오염이 지구상에서 가장 적은 곳이며, 현재 우리가 거주하고 있는 각 대륙을 이해하는데 많은 기여를 하고 있다고 할 수 있다. 특히, 남극대륙을 대상으로 기상 및 기후학적인 관점에서 많은 연구가 수행되어 지고 있으며, 최근에는 지구온난화와 문제와 관련하여 남극대륙의 배경농도 측정 및 monitoring에 관심이 집중되고 있다. (중략)

• 한국해양공학회지
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• 제18권2호
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• pp.25-32
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• 2004

We surveyed the coastal structure damage created by typhoon ‘Maemi’, which heavily struck the Korean peninsula on September 12, 2003. The survey revealed that high tides and strong winds induced by the typhoon were the main causes of the coastal damage, especially in the Busan areas. Though some experimental real-time coastal monitoring stations captured the typhoon movements at the critical time, more systematic and complete system should be implemented to save human lives and property from huge typhoon disasters.

• 한국식품위생안전성학회지
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• 제3권3호
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• pp.131-137
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• 1988

배와 단감중 농약잔류량을 조사하기 위해 전국 주산단지에서 각 30점씩 1985년 에 채취, 조사한 결과는 다음과 같다. 1. 배의 경우 7~60%의 시료에서 잔류농약이 검출되었으나 잔류수준은 매우 낮았다. 검출시료의 평균잔류량은 잔류허용기준에 크게 미달되었으며 조사최대치의 경우에도 잔류허용기준의 1/53~2/3에 불과하였다. 2. 검출농약의 잔류분포를 보면 captan과 captafol은 75~80%가 0.2ppm 이하로, dicofol은 77%가 0.1ppm 이하로 parathion은 60%가 0.05ppm 이하로 검출되었다. 3. 한편 배 과일의 부분별 잔류분포를 조사한 결과 배 중 잔류농약의 대부분이 과피에 잔류하고 과육에는 18~29% 잔류하였다. 4. 단감의 경우는 captan, captafol, EPN, parathion 및 phenthoate가 3~20%의 시료에서 검출되었으나 잔류수준은 매우 낮았으며 조사최대치의 경우에도 잔류허용기준에 크게 미달하였다. 본 조사결과는 배와 단감이 사과와 더불어 우리나라의 중요수출농산물인 만큼 농산물 국제무역에서 장애요인의 하나인 농약 잔류문제에 대처하고 또한 식품별 잔류허용기준설정에 중요한 기초 자료로 활용될 것이다..

• 한국광물학회지
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• 제30권1호
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• pp.1-9
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• 2017

본 연구는 무인항공기를 활용한 원격탐사적 기법을 통해 고해상도 정사영상과 수치표고모델기반 3차원 지표모델을 구축하여, 광해복구사업의 중간단계 모니터링에 활용하고 그 효율성을 고찰하였다. 무인항공기를 통한 원격탐사로 3.8 cm의 공간해상도를 갖는 수치표고모델 및 정사영상을 구축하였으며, 광해복구사업의 중간과정을 모니터링하였다. 또한 고해상도 영상을 통해 사물 및 지형적 구분이 용이함을 확인하였다. 구축된 수치표고모델을 기반으로 3차원 모델을 구축하였고 토양복구사업의 면적 및 체적 등의 공간정보를 추출하였다. 그 결과 사업 결과모델 형성을 위한 추가적인 토양 적치 총량은 $268,672m^3$이며 약 71만 톤의 양에 해당하는 것을 확인하였다. 이는 무인항공기의 광해복구사업 모니터링의 효율성을 증명하는 것으로 추후 보다 많은 활용도를 보일 것으로 사료된다.