• 제목/요약/키워드: Mobile facilities

검색결과 428건 처리시간 0.027초

녹산국가산단의 대기질 개선 및 관리방안: 휘발성유기화합물질 위주로 (Improving and Managing Air Quality in Noksan National Industrial Complex: Focus on Volatile Organic Compounds)

  • 강종민
    • 한국환경과학회지
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    • 제33권9호
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    • pp.645-665
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    • 2024
  • For volatile organic compounds (VOCs) emanating from workplaces within the Noksan national industrial complex, the emission characteristics of pollutants were identified through zone-based measurements using vehicles equipped with selective ion flow tube mass spectrometry(SIFT-MS). The average concentration of total VOCs was higher in zones 2, 4, and 5 than in zones 1, 3, and 6, and was 2.1 to 4.2 times higher than background concentrations. The average concentrations of pollutants investigated were (from highest to lowest) methyl ethyl ketone, formaldehyde, methanol, and n-hexane. However, the pollutants that should be prioritized for reduction to decrease ozone generation were (from highest to lowest) methyl ethyl ketone, n-hexane, for maldehyde, and ethylbenzene+xylene. Benzene, a substance governed by atmospheric environmental standards, exhibited a frequency distribution exceeding the stipulated limits, and concentrations exceeding 100 ppb were identified for methyl ethyl ketone, methanol, toluene, and n-hexane. In certain class 4 and 5 workplace facilities, VOC emissions and emission prevention installations were inadequately managed, necessitating the formulation of management measures for small enterprises. Also, workplaces that emit large amounts of VOCs need to upgrade to VOC-prevention installations with higher processing efficiencies. To efficiently monitor VOCs in a wide range of areas, such as the Noksan national industrial complex, it is considered appropriate to monitor workplaces that emit high concentrations of VOCs using mobile SIFT-MS in real time rather than relying on fixed monitoring methods. A specialized method targeting approximately 10 VOCs is necessary to quickly track emission sources.Furthermore, it is essential to phase in a system for the intensive management of suspected workplaces based on accumulated data from SIFT-MS in areas where high VOC concentrations are measured and to establish a cooperative system for sharing data between relevant institutions.

다채널 저가 GNSS 측위 모듈기반 RTK 측량의 효용성 평가 (Evaluating of the Effectiveness of RTK Surveying Performance Based on Low-cost Multi-Channel GNSS Positioning Modules)

  • 김치훈;오성종;이용창
    • 지적과 국토정보
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    • 제52권2호
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    • pp.53-65
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    • 2022
  • GNSS 위성측위시스템의 고도화에 따라 다채널 GNSS 수신기, 다 주파 외장안테나 및 모바일 앱(App)기반 공개형 측위해석 소프트웨어 등 사용자 부문에서도 정확성과 경제성을 반영한 하드웨어 및 운용 소프웨어의 모듈(Module)화가 구현되어 사용자의 목적에 따라 능동적 구성방식(DIY, Do it yourself)의 다채널 GNSS RTK 측위가 가능하다. 특히, Multi-GNSS 위성의 활용 인프라가 확대되고 다양한 모듈의 조합에 따른 활용·확대의 잠재성이 부각되면서 다채널 저가 GNSS 수신기 모듈의 활용에 대한 관심이 점차 높아지고 있다. 본 연구의 목적은 다양한 형태로 대중시장에 등장하고 있는 다채널 저가 GNSS 수신기를 검토하고 다채널 저가 GNSS 측위 모듈 기반 RTK 측량 시스템(이하, "다채널 GNSS RTK 모듈 측위 시스템")을 구성하여 행정안전부의 "주소정보시설 조사사업"의 활용 방안을 분석하고 활용 가능성을 평가하였다. 이를 위해 U-blox사의 F9P 칩셋, 안테나, GNSS 관측자료의 Ntrip 전송 및 RTK 측위용 해석 앱(App) 등 관련 모듈을 스마트폰을 매개로 조합, 저가형 "다채널 GNSS RTK 모듈 측위 시스템"을 구성하고 원형 궤적에 대한 동적측위 실시 및 주소정보시설을 대상으로 정적측위를 수행하였다. 실험대상지 내 고정점 5점을 대상으로 측지용 수신기 정적측량성과와 비교분석한 결과 평균 ± 1.2cm의 표준편차로 양호한 정적측량성과를 획득할 수 있었다. 또한, 드론영상 해석으로 구성한 정사영상 내 원형구조물의 외곽선에 대한 검사점과 저비용 RTK GNSS 수신기의 동적측량 궤적과 비교한 결과, 평균 ± 2.5cm의 표준편차로 매우 근접한 궤적 성과를 확인할 수 있었다. 특히, 주소정보시설에 적용한 결과, 고가의 상업용 측지형 수신기 대비 저렴한 비용으로 공간정보구축의 효용성을 검증할 수 있었으므로 지적분야에서 본 연구에서 구성한 "다채널 GNSS RTK 모듈 측위 시스템"의 다양한 활용성이 기대된다.

한국농촌보건(韓國農村保健)의 문제점(問題點)과 개선방안(改善方案) (Innovative approaches to the health problems of rural Korea)

  • 노인규
    • 농촌의학ㆍ지역보건
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    • 제1권1호
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    • pp.5-9
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    • 1976
  • The categories of national health problems may be mainly divided into health promotion, problems of diseases, and population-economic problems which are indirectly related to health. Of them, the problems of diseases will be exclusively dealt with this speech. Rurality and Disease Problems There are many differences between rural and urban areas. In general, indicators of rurality are small size of towns, dispersion of the population, remoteness from urban centers, inadequacy of public transportation, poor communication, inadequate sanitation, poor housing, poverty, little education lack of health personnels and facilities, and in-accessibility to health services. The influence of such conditions creates, directly or indirectly, many problems of diseases in the rural areas. Those art the occurrence of preventable diseases, deterioration and prolongation of illness due to loss of chance to get early treatment, decreased or prolonged labour force loss, unnecessary death, doubling of medical cost, and economic loss. Some Considerations of Innovative Approach The followings art some considerations of innovative approaches to the problems of diseases in the rural Korea. 1. It would be essential goal of the innovative approaches that the damage and economic loss due to diseases will be maintained to minimum level by minimizing the absolute amount of the diseases, and by moderating the fee for medical cares. The goal of the minimization of the disease amount may be achieved by preventive services and early treatment, and the goal of moderating the medical fee may be achieved by lowering the prime cost and by adjusting the medical fees to reasonable level. 2. Community health service or community medicine will be adopted as a innovative means to disease problems. In this case, a community is defined as an unit area where supply and utilization of primary service activities can be accomplished within a day. The essential nature o the community health service should be such activities as health promotion, preventive measures, medical care, and rehabilitation performing efficiently through the organized efforts of the residents in a community. Each service activity should cover all members of the residents in a community in its plan and performance. The cooperation of the community peoples in one of the essential elements for success of the service program, The motivations of their cooperative mood may be activated through several ways: when the participation of the residents in service program of especially the direct participation of organized cooperation of the area leaders art achieved through a means of health education: when the residents get actual experience of having received the benefit of good quality services; and when the health personnels being armed with an idealism that they art working in the areas to help health problems of the residents, maintain good human relationships with them. For the success of a community health service program, a personnel who is in charge of leadership and has an able, a sincere and a steady characters seems to be required in a community. The government should lead and support the community health service programs of the nation under the basis of results appeared in the demonstrative programs so as to be carried out the programs efficiently. Moss of the health problems may be treated properly in the community levels through suitable community health service programs but there might be some problems which art beyond their abilities to be dealt with. To solve such problems each community health service program should be under the referral systems which are connected with health centers, hospitals, and so forth. 3. An approach should be intensively groped to have a physician in each community. The shortage of physicians in rural areas is world-wide problem and so is the Korean situation. In the past the government has initiated a system of area-limited physician, coercion, and a small scale of scholarship program with unsatisfactory results. But there might be ways of achieving the goal by intervice, broadened, and continuous approaches. There will be several ways of approach to motivate the physicians to be settled in a rural community. They are, for examples, to expos the students to the community health service programs during training, to be run community health service programs by every health or medical schools and other main medical facilities, communication activities and advertisement, desire of community peoples to invite a physician, scholarship program, payment of satisfactory level, fulfilment of military obligation in case of a future draft, economic growth and development of rural communities, sufficiency of health and medical facilities, provision of proper medical care system, coercion, and so forth. And, hopefully, more useful reference data on the motivations may be available when a survey be conducted to the physicians who are presently engaging in the rural community levels. 4. In communities where the availability of a physician is difficult, a trial to use physician extenders, under certain conditions, may be considered. The reason is that it would be beneficial for the health of the residents to give them the remedies of primary medical care through the extenders rather than to leave their medical problems out of management. The followings are the conditions to be considered when the physician extenders are used: their positions will be prescribed as a temporary one instead of permanent one so as to allow easy replacement of the position with a physician applicant; the extender will be under periodic direction and supervision of a physician, and also referral channel will be provided: legal constraints will be placed upon the extenders primary care practice, and the physician extenders will used only under the public medical care system. 5. For the balanced health care delivery, a greater investment to the rural areas is needed to compensate weak points of a rurality. The characteristics of a rurality has been already mentioned. The objective of balanced service for rural communities to level up that of urban areas will be hard to achieve without greater efforts and supports. For example, rural communities need mobile powers more than urban areas, communication network is extremely necessary at health delivery facilities in rural areas as well as the need of urban areas, health and medical facilities in rural areas should be provided more substantially than those of urban areas to minimize, in a sense, the amount of patient consultation and request of laboratory specimens through referral system of which procedures are more troublesome in rural areas, and more intensive control measures against communicable diseases are needed in rural areas where greater numbers of cases are occurred under the poor sanitary conditions.

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농특산품 전시판매장 디자인 현황 분석 및 유형별 분석 - 농촌관광마을 현장조사 및 농업인 공급자 의식조사를 중심으로 - (Analysis of Design Status by Type at Display Store of Regional Agricultural Products: Focusing on the Survey of Farming Suppliers' Attitude and Site Examination of Rural Tourism Village)

  • 진혜련;채혜성;강가혜;조록환
    • 농촌계획
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    • 제19권3호
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    • pp.13-24
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    • 2013
  • With the increase of visitors to rural tourism villages, the direct selling at sites is getting vitalized. Accordingly, their display stores is getting more important. Therefore, this study has selected 30 domestic rural tourism villages as study objects for the attitude survey of 200 farming suppliers and the site examination for the designs of those display stores in order to analyze their status and classify the types of necessity. Such operation status as sale item, sale method, method of supply and demand, major customer, sales scale, manager, opening hour, and operation cost were examined, to identity and for design factors the pattern, material quality and color were investigated. For the attitude of farming suppliers, the tactics of sales, the reason for being positive or negative, the functionality and the features of display stores were examined through brainstorming. IBM SPSS Statistics 20 Program was employed for Frequency, which indicated that village chiefs and store managers with the sales scale of 1 to 20 million won are dealing with female customers in their 40's and 50's and that those stores are open at the time of experience or year round without any operation expense. Permanent type and Fixed type were found to be the design factors of the display-case type with the material and the color of wood and orange respectively. The result of investigation analysis of farming suppliers' attitude showed the followings: the need of display stores is quite high, structure type and permanent type have high fitness and from the viewpoint of display-on-table type as a standard moving type was very convenient. The analysis of significant items at the characteristics of those display stores revealed that their locations, quality conservation, sanitation, users' convenience, designs and promotion are very important. The result of status analysis revealed that though there is a correlation among the types of display stores depending on the visiting season of tourists their installing is not desirable. Three types have been analyzed: Type 1 is a structure type only in the villages with continuous visitors, Type 2 a moving-table type only in the villages with temporary visitors and Type 3 is a fixed display-case type.

도시 자동차도로 터널 내부의 대기오염도 공간분포 특징 (Spatial Distribution of Air Pollution Level inside Roadway Tunnels in Urban Area)

  • 박보은;이승복;이동훈;이승재;우대광;최재현;진현철;배귀남;윤성택
    • 한국입자에어로졸학회지
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    • 제8권1호
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    • pp.17-28
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    • 2012
  • Air pollution levels of gases and aerosol particles inside the Jeongneung and Hongjimun tunnels of the Naebu express way in Seoul were investigated through on-road measurement using a mobile emission laboratory (MEL) on February 8, 2011. The concentrations of $NO_x$, $CO_2$, number concentration of particles ranging 21-560 nm, and surface area of particles deposited on a human lung almost linearly increased with increasing distance from the tunnel entrance, and decreased rapidly before the tunnel exit. This trend was observed regardless of tunnel length and driving directions, which thought to be caused by semi-transverse ventilation facilities of the tunnels. The concentration increments per 1-m distance for $NO_x$, $CO_2$, deposited particle surface area, and number of particles ranging 21-560 nm were 0.61~0.80 ppb, 0.16~0.21 ppm, $0.20{\sim}0.29{\mu}m^2/cm^3$, and 117~192 particles/$cm^3$, respectively. Average pollution levels inside the two tunnels for $CO_2$, deposited particle surface area, and number of particles >5.6 nm ranged 681~748 ppm, $246{\sim}381{\mu}m^2/cm^3$, and $2.4{\sim}6.7{\times}10^5$ particles/$cm^3$, respectively. In case of $NO_x$, the maximum concentration exceeded 1 ppm. These pollution levels inside the tunnels are much higher than those at urban background sites. This result can be utilized as basic data to evaluate the effectiveness of present ventilation system for reducing the pollution level caused by vehicles inside the tunnels.

점토층의 밀도 변화에 따른 Co-60의 확산속도 (Diffusivities of Co-60 through the Clay with varying bulk density.)

  • 석태원;김홍태;모세영
    • Journal of Radiation Protection and Research
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    • 제20권4호
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    • pp.265-274
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    • 1995
  • Co-60은 원자력발전소에서 발생하는 부식생성물로서 중저준위 방사성폐기물에 함유된 가장 중요한 핵종중 하나다 방사성폐기물처분장 충전물로 많이 사용되는 점토층을 통한 Co-60 확산실험을 하여 밀도변화에 따른 확산계수를 구하였다. Co-60의 확산실험 기간은 점토 밀도에 따라 최소 9시간에서 최대 120일이 걸렸으며, 확산계수는 저밀도인 $0.41g/cm^3$에서 $8.79{\times}10^{11}m^2/s$로부터 고밀도인 $2.03g/cm^3$에서 $6.82{\times}10^{14}m^2/s$까지 급격히 감소하는 현상을 보여주었다. 그리고, 기존에 수행한 연구와 비친 결과 다음과 같은 사실을 확인할 수 있었다. 첫째, 2가 이온인 Sr나 Co이온은 저밀도 점토층에서 1가 이온인 Cs 보다 큰 확산속도를 갖는다. 이러한 현상은 점토표면에 흡착되는 양이온들의 수화상태로 부터 설명할 수 있었다. 둘째, Co 이온의 경우 저밀도에서는 Sr이온보다도 큰 확산계수를 보여준다. 이러한 현상은 Co이온의 수화반경이 Sr이온보다 크다는 사실로 해석할 수 있었다. 셋째, 밀도가 증가함에 따라 Co 이온의 확산계수는 Cs 이온보다도 작은 값으로 급격히 감소한다. 이러한 현상은 점토층의 밀도가 증가함에 따라 점토표면과 화학결합을 하는 Co 이온들이 급격히 증가하고, 점토의 결정속으로 잠적하여 점토의 일부가 되는 이온들이 급격히 증가하기 때문인 것으로 생각된다. 이와 같은 현상들은 표면확산이론으로 설명이 가능하며 특히 저밀도 점토층에서 Co-60의 확산속도가 크다는 것은 중 저준위 방사성 폐기물 처분장 설계나 안전성 평가에 매우 중요한 자료가 될 것이다.

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Ac/Ds 삽입 변이체를 이용한 벼 유전자 기능 연구 (Current status of Ac/Ds mediated gene tagging systems for study of rice functional genomics in Korea)

  • 이강섭;박성한;윤도원;안병옥;김창국;한창덕;이기환;박동수;은무영;윤웅한
    • Journal of Plant Biotechnology
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    • 제37권2호
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    • pp.125-132
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    • 2010
  • Rice is the staple food of more than 50% of the worlds population. Cultivated rice has the AA genome (diploid, 2n=24) and small genome size of only 430 megabase (haploid genome). As the sequencing of rice genome was completed by the International Rice Genome Sequencing Project (IRGSP), many researchers in the world have been working to explore the gene function on rice genome. Insertional mutagenesis has been a powerful strategy for assessing gene function. In maize, well characterized transposable elements have traditionally been used to clone genes for which only phenotypic information is available. In rice endogenous mobile elements such as MITE and Tos (Hirochika. 1997) have been used to generate gene-tagged populations. To date T-DNA and maize transposable element systems has been utilized as main insertional mutagens in rice. A main drawback of a T-DNA scheme is that Agrobacteria-mediated transformation in rice requires extensive facilities, time, and labor. In contrast, the Ac/Ds system offers the advantage of generating new mutants by secondary transposition from a single tagged gene. Revertants can be utilized to correlate phenotype with genotype. To enhance the efficiency of gene detection, advanced gene-tagging systems (i.e. activation, gene or enhancer trap) have been employed for functional genomic studies in rice. Internationally, there have been many projects to develop large scales of insertionally mutagenized populations and databases of insertion sites has been established. Ultimate goals of these projects are to supply genetic materials and informations essential for functional analysis of rice genes and for breeding using agronomically important genes. In this report, we summarize the current status of Ac/Ds-mediated gene tagging systems that has been launched by collaborative works from 2001 in Korea.

교실은 어떻게 '스마트'해지는가?

  • 정한별
    • 과학기술학연구
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    • 제19권3호
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    • pp.201-246
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    • 2019
  • 정보통신기술은 교육을 큰 위기에 빠트리는 위험물질 취급을 받기도 하고, 위기에서 구원하는 구원자로 비추어지기도 한다. 한국 정부는 2011년 스마트교육 정책을 통해 정보통신기술을 적극 공교육의 학교들로 끌어들여 교육을 혁신하고 인재대국을 건설하겠다고 발표했다. 스마트교육은 타블렛 PC나 노트북과 같은 기기를 활용하여 수업을 진행할 수 있는 표준 교실 모델을 정립해 각 학교에 확산, 정착시키고자 했다. 이 논문은 스마트교육 정책이 꿈꾸었던 스마트교실이 실제 교육 현장에서는 어떤 마찰을 일으켰는지 분석한다. 이를 위해 스마트교육 정책의 방향과 이상을 분석하고, 실제로 스마트한 교실 환경을 구축하고 있는 학교 세 곳에 방문해 시설 견학 및 심층 인터뷰를 수행했다. 스마트교육 정책이 제안한 이상적 교실은 모델하우스처럼 깔끔한 공간에 스마트폰처럼 다양한 기능을 한 번에 갖춘 패키지였지만 일상적으로 보통 교실처럼 활용되기 어려웠다. 각 학교는 모델을 수용하는 대신 규모, 지역 특성, 학생들과 교사의 사회경제적 상황, 교사의 경험, 기존 인프라의 유무 등의 요인들이 조합되는 방식에 따라 각자의 방식으로 "스마트"해졌다. A 초등학교에서는 기계가 학교의 공간을 길들여 자신만의 공간을 만들어내는 한편 이동을 위해서는 학교의 규칙에 따르게 되었다. B 초등학교에서는 학교 전반을 아우르는 인프라가 만들어지지는 못했지만 선생님의 경험에 힘입어 조직화했으며, C 초등학교에서는 특정 교실에 밀집되어 선생님의 전문성을 증진시켰다. 스마트교실의 구성하고 있던 기기들은 분해되고, 맥락에 맞게 재조합되어 각 학교의 교실들을 "스마트"하게 만들었다.

딥뉴럴네트워크 기반의 흡연 탐지기법 설계 (Design of detection method for smoking based on Deep Neural Network)

  • 이상현;윤현수;권현
    • 융합보안논문지
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    • 제21권1호
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    • pp.191-200
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    • 2021
  • 컴퓨팅 기술의 발전과 데이터를 저장할 수 있는 클라우드 환경, 그리고 스마트폰의 보급으로 인하여 많은 데이터가 생산되는 환경에서 인공지능 기술이 발전되고 있다. 이러한 인공지능 기술 중에서 딥뉴럴네트워크는 이미지 인식, 이미지 분류 등에서 탁월한 성능을 제공하고 있다. 기존에는 이러한 딥뉴럴네트워크를 이용하여 산불 및 화재 예방을 위한 이미지 탐지에 대해 많은 연구가 있었지만 흡연 탐지에 대한 연구는 미흡한 실정이었다. 한편 군 부대에서는 각종 시설에 대한 감시체계를 CCTV를 통해 구축하고 있는데 화재, 폭발사고 예방을 위해 탄약고 주변에서의 흡연이나 금연구역에서의 흡연을 CCTV로 탐지하는 것이 필요한 상황이다. 본 논문에서는 딥뉴럴네트워크를 이용하여 흡연 여부를 탐지하는 방법에 대한 성능 분석을 하였으며 활성화함수, 학습률 등 실험적으로 최적화된 수치를 반영하여 흡연사진과 비흡연사진을 두 가지 경우로 탐지하는 것을 하였다. 실험 데이터로는 인터넷 상에 공개되어 있는 흡연 및 비흡연 사진을 크롤링하여 데이터를 구축하였으며, 실험은 머신러닝 라이브러리를 이용하였다. 실험결과로 학습률 0.004로 최적화 알고리즘 Adam을 사용하였을 때, 93%의 accuracy와 92%의 F1-score를 갖는 것을 볼 수 있었다. 또한 이로써 이미지의 연속인 CCTV 영상도 딥뉴럴네트워크를 이용하여 흡연 여부를 탐지할 수 있음을 알 수 있었다.

RFID를 이용한 도로하부 공동 관리 시스템의 현장 적용을 위한 기초 실험 (A Fundamental Experiment for Field Application of the under Pavement Cavity Management System Using RFID)

  • 신은철;박광석;박정준
    • 한국재난정보학회 논문집
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    • 제15권3호
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    • pp.391-401
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    • 2019
  • 연구목적: 본 연구는 도로함몰 예방을 위하여 공동탐사시 확인된 공동 중 포장층의 재포장 공사 등에 의한 공동관련 위치 및 이력 정보를 알 수 없게 되어 누구라도 정보를 정확하게 파악할 수 있도록 할 수 있는 RFID(Radio Frequency Identification) 시스템의 현장 적용성을 검토하는 것이다. 연구방법: RFID 시스템에 의한 공동 인식거리, 인식 여부와 인식율, 태그 성능과 태그 종류, 리더기 간섭, 통신, 지하 매설물 영향, 중복 인식 등에 대하여 현장 적용성을 위한 기초실험을 수행하였다. 연구결과: 태그와 리더기 인식 심도, 태그 정보 입력 및 리더기 인식 여부 결과, 기초 실험에 적용된 전자태그칩과 리더기는 도로 공동이 위치한 현장 환경에서 효과적으로 적용성이 있는 것으로 판단된다. 결론: 포장도로관리스템의 현장 적용을 위한 RFID 태그에 공동위치를 포함하여 공동에 관한 확인 일자, 공동의 규모, 발생원인, 주변 지하매설물 등의 여러 가지 제반 정보를 저장하여 전산화 및 모바일 활용도 가능한 시스템으로 공동관리 효과를 극대화 할 수 있다.