• Title/Summary/Keyword: 기술 분류

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Complete Larval Development of Hemigrapsus sanguineus(Decapoda, Brachyura, Grapsidae) Reared in Laboratory (무늬발개 Hemigrapsus sanguineus(게 아목, 바위게 과)의 유생발생)

  • Hwang, Sang-Gu;Lee, Chu;Kim, Chang-Hyun
    • Animal Systematics, Evolution and Diversity
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    • v.9 no.2
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    • pp.69-86
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    • 1993
  • The larval stages of Hemigrapsus sanguineus were reared in the laboratory and described with illustrative figures. Five zoeal and one megalopal stages were found in the complete larval development. At 25^{\circ}C.$, the megalopa and the first crab instar were attained in 18 and 31 days after hatching, respectively. The first zoeal larva of H. sanguineus showed the characteristics ~ h i c h coincide with those of the same genus by bearing lateral spines on carapace, B-types of telson and antenna, 1 +5 setae on the endopod of maxillule, and 2 + 2 setae on the endopod of maxilla. Morphological features of H. sanguineus larvae were compared to the previous descriptions of larvae of the same genus and morphological differences among them were discussed.

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Queue Detection using Fuzzy-Based Neural Network Model (퍼지기반 신경망모형을 이용한 대기행렬 검지)

  • KIM, Daehyon
    • Journal of Korean Society of Transportation
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    • v.21 no.2
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    • pp.63-70
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    • 2003
  • Real-time information on vehicle queue at intersections is essential for optimal traffic signal control, which is substantial part of Intelligent Transport Systems (ITS). Computer vision is also potentially an important element in the foundation of integrated traffic surveillance and control systems. The objective of this research is to propose a method for detecting an exact queue lengths at signalized intersections using image processing techniques and a neural network model Fuzzy ARTMAP, which is a supervised and self-organizing system and claimed to be more powerful than many expert systems, genetic algorithms. and other neural network models like Backpropagation, is used for recognizing different patterns that come from complicated real scenes of a car park. The experiments have been done with the traffic scene images at intersections and the results show that the method proposed in the paper could be efficient for the noise, shadow, partial occlusion and perspective problems which are inevitable in the real world images.

Ultrasonic Flaw Detection of Turbine Blade Roots (터빈 동익 Root부 초음파 탐상)

  • Jung, H.K.;Chung, M.H.
    • Journal of the Korean Society for Nondestructive Testing
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    • v.13 no.3
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    • pp.24-30
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    • 1993
  • The necessity of ultrasonic inspection to detect the cracks in turbine blade is being increased as the forced outage of nuclear power plants have been occurred due to blade failure in turbine components. However, the complex blade root geometry causes the ultrasonic inspection technique not to be established yet and much effort is required to set up a more reliable inspection. In this paper, the ultrasonic inspection technique for flaw detectability, skew angle effect, identification of flaw and geometric signal have been investigated with a test block and discussed the interpretation of ultrasonic signal through the acquisition and analysis of RF waveform. The experimental results show that the proper examination procedure can be established. It is required that the skew angle is essential to decrease the effect of signals from the complex blade geometry. The present results of this study can be applied to the site inspection without blade disassembly.

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Suggestions on the Improvement of the Hydrological Data Operation II (수문관측자료 운영 개선방안에 대한 연구 II)

  • Kim, Hwi-Rin;Cho, Hyo-Seob
    • Proceedings of the Korea Water Resources Association Conference
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    • 2007.05a
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    • pp.879-882
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    • 2007
  • 수문관측자료 운영 개선방안에 대한 연구(2006, 김휘린, 조효섭)에서 건설교통부 한강홍수통제소에서 수행하고 있는 수문관측자료를 대상으로 하여 관측, 기록, 전송, 품질관리, DB구축 및 정보화의 5단계로 임의 분류하고 각 단계별 현황을 파악하여 문제점을 검토하고 개선방안을 제안하였다. 이는 적극적으로 수용되어 수문관측자료 운영에 대해 개선을 시도하였으며 본 논문에서는 이를 간략히 소개하고자한다. 첫째, 관측소 점검 대장이 조사과와 전기통신과로 이분화되어 있고 각 관측소별로 점검대장이 비치되어 있으나 이를 수기로 작성하고 있으며 자료의 업데이트 및 과거점검대장의 DB 구축과 비전산화를 지적한 바 있다. 이에 '물관련시스템 DB연계 사업'을 통해 수기로 작성된 관측시설 점검대장을 전부 DB로 구축하였고 이를 총괄하여 관리 및 점검사항을 업데이트할 수 있는 관측시설 점검대장 관리 및 입력 프로그램을 구축하였고 현재 한강홍수통제소에서 시험 운영 중에 있다. 향후 보완이 끝난 후에는 낙동강, 금강, 영산강 홍수통제소에도 확대 설치 및 운영을 실시할 예정이다. 둘째, 수문자료의 품질관리에 있어서 전산시스템에 의한 완전 자동화는 실현하기가 어려울 뿐 아니라 바람직하지 못한 결과를 가져올 수 있으므로 담당자의 수동 검토 및 처리과정은 필수적이라고 논한 바 있다. 그 후 수문자료품질관리T/F팀(조사과, 전기통신과, 하천정보센터)이 구성되었고, 홍수기 오 결측자료 발생 확인, 긴급대응 촉구, 이상치 발생원인 추정 및 대책 마련 등 고품질 수문자료를 생성하기 위해 노력하였다. T/F팀 활동사항은 타홍수통제소에서도 벤치마킹이 되고 있다. 보다 정확한 댐운영자료 공유방안을 위한 관련기관과의 협력회의가 개최되어 품질관리된 자료의 정보 공유시기, 공유방식, 자료형태 등이 결정되었다. 이는 유관기관간 품질관리된 댐운영자료의 효율적인 정보 공유체계 확립을 위한 체계를 마련하는 계기라고 사료된다. 또한, 유량측정사업 결과를 익년에 반영하는 기존 방식을 개선하기 위해 유량자료관리및분석시스템(프론티어사업에서 수행, 한국건설기술연구원 개발)을 통제소내에 설치 운영을 추진하고 있다.

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A Study on the Change of Smart City's Issues and Perception : Focus on News, Blog, and Twitter (스마트도시의 이슈와 인식변화에 관한 연구 : 뉴스, 블로그, 트위터 자료를 중심으로)

  • Jang, Hwan-Young
    • Journal of Cadastre & Land InformatiX
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    • v.49 no.2
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    • pp.67-82
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    • 2019
  • The purpose of this study is to analyze the issues and perceptions of smart cities. First, based on the big data analysis platform, big data analysis on smart cities were conducted to derive keywords by year, word cloud, and frequency of generation of smart city keywords by time. Second, trend and flow by area were analyzed by reclassifying major keywords by year based on meta-keywords. Third, emotional recognition flow for smart cities and major emotional keywords were derived. While U-City in the past is mostly centered on creating infrastructure for new towns, recent smart cities are focusing on sustainable urban construction led by citizens, according to the analysis. In addition, it was analyzed that while infrastructure, service, and technology were emphasized in the past, management and methodology were emphasized recently, and positive perception of smart cities was growing. The study could be used as basic data for the past, present and future of smart cities in Korea at a time when smart city services are being built across the country.

Analysis of Elementary Teachers' Specialized Content Knowledge(SCK) for the word problems of fraction division (분수 나눗셈의 문장제에 대한 초등 교사들의 전문화된 내용지식(SCK) 분석)

  • Kang, Young-Ran;Cho, Cheong-Soo;Kim, Jin-Hwan
    • Communications of Mathematical Education
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    • v.26 no.3
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    • pp.301-316
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    • 2012
  • Ball, Thames & Phelps(2008) introduced the idea of Mathematical Knowledge for Teaching(MKT) teacher. Specialized Content Knowledge(SCK) is one of six categories in MKT. SCK is a knowledge base, useful especially for math teachers to analyze errors, evaluate alternative ideas, give mathematical explanations and use mathematical representation. The purpose of this study is to analyze the elementary teacher's SCK. 29 six graders made word problems with respect to division fraction $9/10{\div}2/5$. These word problems were classified four sentence types based on Sinicrope, Mick & Kolb(2002) and then representative four sentence types were given to 10 teachers who have taught six graders. Data analysis was conducted through the teachers' evaluation of the answers(word problems) and revision of students' mathematical errors. This study showed how to know meanings of fraction division for effective teaching. Moreover, it suggested several implications to develop SCK for teaching and learning.

Analysis of Surface Contaminants and Removal Techniques on Three-story Stone Pagoda at the West of Gameunsaji Site (감은사지서삼층석탑의 표면오염물 분석과 제거기술)

  • Kim, Sa-Dug;Lee, Tae-Jong;Kim, Da-Ram;Han, Min-Su
    • Journal of Conservation Science
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    • v.26 no.2
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    • pp.203-211
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    • 2010
  • Analytic research on the surface pollutant of the three storied-pagoda at the west of Gameunsaji site as well as studies of previous wet cleaning cases was undertaken in order to decide cleaning method for removing inorganic pollutants. The status of pollutant was examined by naked eye observation, SEM-EDS, XRD. Then it was compared and categorized through qualitive and quantitative analysis. The result showed that the surface pollutants consisted of iron compounds or sulfur compounds and it was crystallized in the form of circle, oval, needle, etc. Result, Low-pressure rotating vortex process cleaning, with which particular matters are sprayed in swirl, is considered to be the best method to remove the pollutants.

Disaster Management and Disaster Medical Improvement in Underground Space (서울시 지하공간 재난관리 및 재난의료 개선방안)

  • Bae, Yoonshin;Park, Jihye
    • Journal of the Society of Disaster Information
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    • v.7 no.2
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    • pp.110-122
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    • 2011
  • In this study, the disaster management and disaster medical improvement was described in underground space(specifically underground shopping center) in case of fire disaster occurred. Firstly, statue and system was discussed concerning building law, safety, fire services, refuge. The underground in Seoul management is classified as to space and form and management agent is different according to the type form. Because the difficulty of emergency rescue arises due to individual management system unified system needs to be established and improvement of facility management agent is necessary. For the patient to be transfer on the ground, corporation between command head quarter and emergency rescue team are essential. And disaster information and emergency medical information are also need to be considered. Therefore, effective countermeasures for emergency saving is urgent considering distribution of medical institution and medical treatment.

A Study on Disclosure & Utilizing Plan for Closed National R&D Reports Information (비공개 국가연구개발보고서 정보의 공개 및 활성화 방안 연구)

  • Choi, Kwang-Nam;Yoon, Chong-Min
    • Journal of the Korean Society for Library and Information Science
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    • v.45 no.1
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    • pp.233-254
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    • 2011
  • According to the current legislation in Korea, some of national R&D reports cannot be disclosed or registered, when they need external security or the interested parties require them to be classified for a certain period of time. Therefore, there are some effects on the collection and circulation of information about R&D reports. Since those closed national R&D reports are the important outcomes from national R&D projects, they should be properly open, circulated and used by the public, when the reasons for closing those reports are removed. This study examines the present condition of the closure system of national R&D reports, and proposes a plan for collecting and utilizing the closed national R&D reports at the national level.

Utilizing SPOT-5 Satellite Data for Present State Analysis of Irrigation Reservoirs of the Yeseong River Basin (예성강 유역의 저수지 현황 분석을 위한 SPOT-5 위성자료의 이용)

  • Lee, Jin-Duk;Lee, Byung-Hwan;Song, Young-Suk
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.28 no.2
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    • pp.255-263
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    • 2010
  • In order to prepare the interchange between and the unification of North and South Korea, it is needed to establish the development direction of irrigation reservoirs and formulate technological and political directions for preparing effectively against the demand of agricultural countermeasure information like the analysis of rural comprehensive development projects and the present state of agricultural land of North Korea. The purpose of this research is to construct the database of agricultural productive infrastructures and analyze the present state of irrigation reservoirs of the Yeseong River Basin in North Korea using SPOT-5 satellite imagery. As a result of the research, we were able to not only design classification items but establish method and precedure for producing thematic maps related agricultural productive infrastructure without on-site survey by analyzing present condition related to agricultural water of the basin. And we intend to provide basic data for analyzing suitabile locations of irrigation reservoirs in the basin by performing basin extraction, volume evaluation of the existing reservoirs, scale cultivative lands, benefit area fo the reservoirs, and the existing agricultural water system. In addition, we were able to understand the problem and limit in constructing the database related agricultural productive facilities.