• 환경영향평가
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• 제28권6호
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• pp.568-579
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• 2019

연구는 서울시 도시대기 측정망의 월별 미세먼지 농도와 측정소 주변 버퍼별, 토지피복 유형별 비율의 관계를 분석하여 미세먼지 농도에 대한 토지피복의 영향을 규명하고자 하였다. 대분류 토지피복 유형과 미세먼지 농도의 월별 상관분석 결과 버퍼 3km에서, PM_2.5보다 PM₁₀에서 상관성이 잘 나타났고, 산림과 뚜렷한 음의 상관관계, 초지와 시가지는 PM₁₀과, 나지와 시가지는 PM_2.5와 일부 양의 상관관계를 나타냈다. 버퍼 3km 내 중분류 및 세분류 우세 피복유형의 월별 상관분석 결과 PM₁₀은 활엽수림과 뚜렷한 음의 상관관계를 나타냈고, 도로와 일부 양의 상관이 우세한 편이었다. PM_2.5는 활엽수림과 일부 음의 상관, 상업지역과 일부 양의 상관이 많은 편이었다. 그 밖에 초지 및 나지 세부 유형의 상관성은 매우 낮거나 없었다. 양의 상관 및 음의 상관관계의 각 대표 피복유형으로 단계선택법에 의한 월별 회귀분석을 실시한 결과 PM₁₀은 활엽수림 비율 증가에 의한 농도 감소 영향이 뚜렷하였고, 도로는 변수선택에서 제거되었다. PM_2.5는 일부 월별로 상업지역 비율 증가에 따른 농도 증가 영향 또는 활엽수림 비율 증가에 따른 농도 감소 영향을 받았지만, 그 영향력은 PM₁₀에 비해 낮았다. 연구결과 측정소 주변 토지피복은 미세먼지 농도 증감에 영향을 주었고, 그 영향은 PM₁₀에서 더 분명하였다. 산림 유형은 미세먼지 농도에 가장 크고, 분명한 영향을 주는 저감 요인이었다. 시가화지역 관련 유형들의 농도 증가 영향은 일부 확인되었다. 도심 산림의 미세먼지 저감 기능은 분명한 효과를 가진 것으로 보이며, 향후 녹지의 세부 특성과 복잡한 도시환경 요인의 작용을 규명하는 후속 연구가 필요하였다.

• Smart Structures and Systems
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• 제22권5호
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• pp.509-525
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• 2018

Sensors and systems in Civionics technology play an important role for continuously facilitating real-time structure monitoring systems by detecting and locating damage to or degradation of structures. An advanced materials, design processes, long-term sensing ability of sensors, electromagnetic interference, sensor placement techniques, data acquisition and computation, temperature, harsh environments, and energy consumption are important issues related to sensors for structural health monitoring (SHM). This paper provides a comprehensive survey of various sensor technologies, sensor classes and sensor networks in Civionics research for existing SHM systems. The detailed classification of sensor categories, applications, networking features, ranges, sizes and energy consumptions are investigated, summarized, and tabulated along with corresponding key references. The current challenges facing typical sensors in Civionics research are illustrated with a brief discussion on the progress of SHM in future applications. The purpose of this review is to discuss all the types of sensors and systems used in SHM research to provide a sufficient background on the challenges and problems in optimizing design techniques and understanding infrastructure performance, behavior and current condition. It is observed that the most important factors determining the quality of sensors and systems and their reliability are the long-term sensing ability, data rate, types of processors, size, power consumption, operation frequency, etc. This review will hopefully lead to increased efforts toward the development of low-powered, highly efficient, high data rate, reliable sensors and systems for SHM.

• 대한전자공학회논문지TC
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• 제43권9호
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• pp.69-79
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• 2006

영상 정보를 이용한 교통 모니터링 시스템에 관한 많은 연구가 이루어졌다. 대부분의 교통 모니터링 기술은 전체 영상을 분석하는 기법과 국부 영역을 검사하는 기법으로 구분된다. 하지만, 제안된 대부분의 기법들은 동작 환경이 변화할 경우 강건성의 결여로 인해 성능이 급격히 저하하는 문제점을 갖고 있다. 본 논문에서는 기존의 논문에서 제안되었던 다양한 기법들의 특성을 조사하고, 장점과 단점을 분석한다. 또한 각 응용 분야마다 영상 처리를 이용하는 기법들이 가지고 있는 문제점들을 해결 할 수 있는 적절한 방법을 고찰한다.

• 한국태양광발전학회지
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• 제4권2호
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• pp.14-24
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• 2018

The potential induced degradation (PID) phenomenon of crystalline silicon photovoltaic (PV) modules has been often found in outdoor PV systems until recently since firstly reported in 2010. Many studies have been conducted about the mechanism and the preventive methods, but systematic diagnosis of the PID has not been applied on-site. This paper focuses on analysis of 5 categories and 10 PID diagnosis methods using the monitoring data, light current-voltage, dark current-voltage, infrared and electroluminescence. We expect to contribute to improvement of power generation through PID diagnosis and troubleshooting in PV plants.

• 한국산학기술학회논문지
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• 제5권1호
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• pp.87-92
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• 2004

This review focuses on the developed and the being developed environmental sensors in particular biological sensors. As well as discussing the classification and some main principles, presenting current trend of the environmental sensors is given. Two main categories are immunosensors and catalytic sensors. In addition to those. DNA or RNA sensors or protein based sensors are discussed. Some crucial examples of the applications of such sensors are given to show how the sensor technology it used for environmental and biological monitoring, biomarkers of exposure.

• 대한핵의학회지
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• 제38권2호
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• pp.143-151
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• 2004

Recent progress in the development of non-invasive imaging technologies continues to strengthen the role of molecular imaging biological research. These tools have been validated recently in variety of research models, and have been shown to provide continuous quantitative monitoring of the location(s), magnitude, and time-variation of gene expression. This article reviews the principles, characteristics, categories and the use of radionuclide reporter gene imaging technologies as they have been used in imaging cell trafficking, imaging gene therapy, imaging endogenous gene expression and imaging molecular interactions. The studios published to date demonstrate that reporter gene imaging technologies will help to accelerate pre-clinical model validation as well as allow for clinical monitoring of human diseases.

• 한국과학교육학회지
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• 제17권1호
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• pp.103-113
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• 1997

The purpose of this study was to identify the preferable learning strategies in science learning and to find out the relationship between these strategies and scientific achievement of students in the secondary school. The learning strategies were tested with two categories, self-focused and work-focused learning. The four types of learning strategies in science learning were analyzed, and they were named to organization, monitoring, elaboration and memorization strategies, which were defined by GSSS test. In the self-focused learning, the organization and monitoring strategies were preferred to the elaboration and memorization strategies. Middle school students had a preference for memorization strategy (p=0.000), whereas high school students had a preference for monitoring strategy (p=0.015). In the case of organization strategy, female groups were preferable to male groups (p=0.027). In the second form of learning types, work-focused learning, the memorization strategy was the same preference as organization and monitoring strategies in the secondary school students, especially the male groups of high school students. The preference of elaboration strategy was relative lower compared with that of self-focused learning type. Middle school students had a preference for monitoring strategy (p=0.001), whereas high school students had a preference for elaboration strategy (p=0.001). The difference of each preference between male and female groups was not shown. From the analysis of correlation between learning strategy and scientific achievement, it showed that the monitoring strategy was commonly correlated with scientific achievement. In the self-focused learning, elaboration and organization strategies were correlated with scientific achievement in high school students (p<0.05). In the work-focused learning, memorization strategy was correlated with scientific achievement in middle school students, especially in male groups (p<0.05).

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.1191-1193
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• 2003

Water quantity and quality monitoring at Taipei Watershed Management Bureau (WRATB) is not only a daily business but also a long term job. WRATB is responsible for providing high quality drinking water to about four millions population in Taipei. The quality of drinking water provided by WRATB is among one of the best in Taiwan. The total area is 717 square kilometers. The water resource pollution is usually divided into two categories, point source pollution and nonpoint source pollution. Garbage disposal is the most important component of the point source pollution, especially those by tourist during holidays and weekends. Pesticide pollution, fertilizer pollution, and natural pollution are the major contributions for nonpoint source pollution. The objective of this paper is to implement remote sensing, geographic information systems, and global positioning systems to monitor water quantity and water quality at WRATB. There are 12 water quality monitoring stations and four water gauge stations at WRATB. The coordinates of the 16 stations were determined by GPS devices and created into the base maps. MapObjects and visual BASIC were implemented to create application modules for water quality and quantity monitoring. Water quality of the two major watersheds at WRATB was put on Internet for public review monthly. The GIS software, ArcIMS, can put location maps and attributes of all 16 stations on Internet for general public review and technical implementations at WRATB. Inquiry and statistic charts automatic manipulations for the past 18 years are also available. Garbage disposal by community and tourist were also managed by GIS and GPS. The storage, collection, and transportation of garbage were reviewed by ArcMap file format. All garbage cart and garbage can at WRATB can be displayed on the base maps. Garbage disposal by tourist during holidays and weekends can be managed by a PDA with a GPS device and a digital camera. Man power allocation for tourist garbage disposal management can be done in an integration of GIS and GPS. Monitoring of water quality and quantity at WRATB can be done on Internet and by a PDA.

• Journal of Communications and Networks
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• 제17권5호
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• pp.525-533
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• 2015

MS Office suit software is the most widely used electronic documents by a large number of users in the world, which has absolute predominance in office software market. MS Office 2007-2013 documents, which use new office open extensible markup language (OOXML) format, could be illegally used as cover mediums to transmit secret information by offenders, because they do not easily arouse others suspicion. This paper proposes nine forensic methods and an integrated forensic tool for OOXML format documents on the basis of researching the potential information hiding methods. The proposed forensic methods and tool cover three categories; document structure, document content, and document format. The aim is to prevent covert communication and provide security detection technology for electronic documents downloaded by users. The proposed methods can prevent the damage of secret information embedded by offenders. Extensive experiments based on real data set demonstrate the effectiveness of the proposed methods.

• Asian Pacific Journal of Cancer Prevention
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• 제13권6호
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• pp.2781-2789
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• 2012

Assessment of perceptions of the community, the determinants and development of their behavior regarding common malignancies, helps in establishing evidence-based activities for prevention and early diagnosis of cancer. However information on this important aspect is lacking in our country. Qualitative methods were here used to obtain information through in depth interviews and Focus Group Discussions (FGDs) with all categories of identified stakeholders. Most were unaware of the activities of the cancer control program. Even the providers were not fully conversant. All respondents mentioned lack of diagnostic and treatment facilities in government, primary and secondary level facilities. Perceptions of different categories of stakeholders regarding why many community members did not attend screening camps and other services reflect the determinants of community behavior, acting independently as well as in combination. The cancer control program was thought to be restricted only to some private facilities and overcrowded government tertiary care facilities where the visits were time consuming. Almost all the facilities were considered curative oriented. Issues of supervision, monitoring and feedback were inadequately addressed by providers who were inadequately trained in many program activities. The program lacked effective planning, coordination and appropriate implementation at the grass roots level in Delhi. Social mobilization was grossly inadequate, as most of the community members were unaware of the existence of the program. Misconceptions about the risk factors, signs and symptoms, diagnosis, and treatment were common amongst community members as well as many of the providers. Thus the national cancer control program in our country needs further community participation and social mobilization. Accessibility, availability, acceptability and affordability of various preventive, curative and rehabilitative activities, as well as intersectoral coordination, training, supervision and monitoring of program activities, all need to be addressed to ensure the success of this important public health program.