• 제목/요약/키워드: Position Classification System

검색결과 142건 처리시간 0.031초

석회암(石灰岩) 토양(土壤)의 지형적(地形的) 특성(特性)과 생성(生成) 및 분류(分類) -II. 강원도(江原道) 영월지역(靈越地域) 석회암(石灰岩) 토양(土壤)의 점토광물특성(粘土鑛物特性)과 생성(生成) 및 분류(分類) (Topographic Characteristics, Formation and Classification of Soils Developed in Limestone -II. Clay Mineralogical Properties, Formation and Classification of Limestone Soils from Yeongweal Area of Gangweon-Do)

  • 정석재;김태순;김영호;문준
    • 한국토양비료학회지
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    • 제23권1호
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    • pp.1-7
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    • 1990
  • 강원도(江原道) 영월군(寧越郡) 영월읍(寧越邑) 방절리일원(芳節里一圓)에 분포(分布)하는 석회암토양중(石灰巖土壤中) 잔적토(殘積土)인 평창통(平昌統) 산록경사지(山麓傾斜地)의 안미통(安美統), 단구지(段丘地)의 율곡통(栗谷統) 및 곡간저지(谷間低地)의 문경통(聞慶統)에 대(對)하여 지형(地形) 및 토지이용(土地利用)에 따라 변화(變化)하는 토양(土壤)의 점토광물(粘土鑛物)과 생성(生成) 분류(分類)을 밝혀 토양개량(土壤改良)의 기초자료(基礎資料)로 활용(活用)코자 조사연구(調査硏究)한 결과(結果)는 다음과 같다. 1. 강원도(江原道) 영월지역(寧越地域) 석회암토양(石灰巖土壤)의 주요(主要) 점토광물(粘土鑛物)은 Kaolinite 및 Al-interlayered vermiculite 이었고, 그 다음으로는 Vermiculite, Illite 및 Chlorite도 분포되었다. 2. 염기치환용량(鹽基置換容量)은 표토(表土)가 10.5~22.9 me/100 g이고, 심토(心土)는 10.0~23.8 me/100 g로서 지형(地形)이 낮아질수록 적어지는 경향(傾向)이었으며, 점토함량(粘土含量)과 염기치환용량(鹽基置換容量)은 고도(高度)의 정상관(正相關)이 있었다. 3. 토심(土深)에 따른 암석학적(岩石學的) 연속성(連續性)을 보면 평창통(平昌統)은 완변(緩變), 안미통(安美統)은 불연속성(不連續性) 율곡통(栗谷統)은 혼성(混性) 그리고 문경통(聞慶統)은 균일성(均一性)을 나타내었다. 4. 형태학적인 토양 분류방법(分類方法)(Soil taxonomy)에 의(依)하면 평창통(平昌統) Typic hapludalfs, 안미통(安美統)은 Fluventic eutrochrepts, 율곡통(栗谷統)은 Fluventic eutrochrepts 이며, 문경통(聞慶統)은 Aeric haplaquepts로 분류(分類)되었다.

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레이더기반 다중센서활용 강수추정기술의 개발 (Development of Radar-Based Multi-Sensor Quantitative Precipitation Estimation Technique)

  • 이재경;김지현;박혜숙;석미경
    • 대기
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    • 제24권3호
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    • pp.433-444
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    • 2014
  • Although the Radar-AWS Rainrate (RAR) calculation system operated by Korea Meteorological Administration estimated precipitation using 2-dimensional composite components of single polarization radars, this system has several limitations in estimating the precipitation accurately. To to overcome limitations of the RAR system, the Korea Meteorological Administration developed and operated the RMQ (Radar-based Multi-sensor Quantitative Precipitation Estimation) system, the improved version of NMQ (National Mosaic and Multi-sensor Quantitative Precipitation Estimation) system of NSSL (National Severe Storms Laboratory) for the Korean Peninsula. This study introduced the RMQ system domestically for the first time and verified the precipitation estimation performance of the RMQ system. The RMQ system consists of 4 main parts as the process of handling the single radar data, merging 3D reflectivity, QPE, and displaying result images. The first process (handling of the single radar data) has the pre-process of a radar data (transformation of data format and quality control), the production of a vertical profile of reflectivity and the correction of bright-band, and the conduction of hydrid scan reflectivity. The next process (merger of 3D reflectivity) produces the 3D composite reflectivity field after correcting the quality controlled single radar reflectivity. The QPE process classifies the precipitation types using multi-sensor information and estimates quantitative precipitation using several Z-R relationships which are proper for precipitation types. This process also corrects the precipitation using the AWS position with local gauge correction technique. The last process displays the final results transformed into images in the web-site. This study also estimated the accuracy of the RMQ system with five events in 2012 summer season and compared the results of the RAR (Radar-AWS Rainrate) and RMQ systems. The RMQ system ($2.36mm\;hr^{-1}$ in RMSE on average) is superior to the RAR system ($8.33mm\;hr^{-1}$ in RMSE) and improved by 73.25% in RMSE and 25.56% in correlation coefficient on average. The precipitation composite field images produced by the RMQ system are almost identical to the AWS (Automatic Weather Statioin) images. Therefore, the RMQ system has contributed to improve the accuracy of precipitation estimation using weather radars and operation of the RMQ system in the work field in future enables to cope with the extreme weather conditions actively.

터빈 로터 디스크 키웨이의 초음파 신호로부터 균열정보의 추출을 위한 신호처리 알고리즘의 개발 (Ultrasonic Signal Processing Algorithm for Crack Information Extraction on the Keyway of Turbine Rotor Disk)

  • 이종규;서원찬;박찬;이종오;손영호
    • 비파괴검사학회지
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    • 제29권5호
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    • pp.493-500
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    • 2009
  • 본 연구에서는 터빈 로터 디스크 키웨이에 발생하는 균열의 상세 정보를 추출하기 위하여 초음파 신호처리 알고리즘을 개발하였다. 초음파 검사 시스템에 의한 터빈 로터 디스크 키웨이 시험편의 초음파 신호로부터 B-주사 이미지를 구성하였다. 구성된 B-주사 이미지를 2차원 신호처리를 위한 입력영상으로 이용하여, 전처리, 균열후보영역 검출, 균열영역 판별 및 균열정보 추출의 4단계로 알고리즘을 구성하였다. 개발된 초음파 신호처리 알고리즘을 이용한 실험을 통하여, 개발된 알고리즘이 키웨이 부위에 발생하는 균열의 특징정보 추출에 의한 균열의 정량적인 평가에 효과적임을 확인하였다.

Accuracy and Safety in Pedicle Screw Placement in the Thoracic and Lumbar Spines : Comparison Study between Conventional C-Arm Fluoroscopy and Navigation Coupled with O-Arm$^{(R)}$ Guided Methods

  • Shin, Myung-Hoon;Ryu, Kyeong-Sik;Park, Chun-Kun
    • Journal of Korean Neurosurgical Society
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    • 제52권3호
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    • pp.204-209
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    • 2012
  • Objective : The authors performed a retrospective study to assess the accuracy and clinical benefits of a navigation coupled with O-arm$^{(R)}$ system guided method in the thoracic and lumbar spines by comparing with a C-arm fluoroscopy-guided method. Methods : Under the navigation guidance, 106 pedicle screws inserted from T7 to S1 in 24 patients, and using the fluoroscopy guidance, 204 pedicle screws from T5 to S1 in 45 patients. The position of screws within the pedicle was classified into four groups, from grade 0 (no violation cortex) to 3 (more than 4 mm violation). The location of violated pedicle cortex was also assessed. Intra-operative parameters including time required for preparation of screwing procedure, times for screwing and the number of X-ray shot were assessed in each group. Results : Grade 0 was observed in 186 (91.2%) screws of the fluoroscopy-guided group, and 99 (93.4%) of the navigation-guided group. Mean time required for inserting a screw was 3.8 minutes in the fluoroscopy-guided group, and 4.5 minutes in the navigation-guided group. Mean time required for preparation of screw placement was 4 minutes in the fluoroscopy-guided group, and 19 minutes in the navigation-guided group. The fluoroscopy-guided group required mean 8.9 times of X-ray shot for each screw placement. Conclusion : The screw placement under the navigation-guidance coupled with O-arm$^{(R)}$ system appears to be more accurate and safer than that under the fluoroscopy guidance, although the preparation and screwing time for the navigation-guided surgery is longer than that for the fluoroscopy-guided surgery.

Taxonomy of Asian Geranium L.(Geraniaceae) based on fruit and seed morphology

  • Park, Seon-Joo;Park, Hong-Duok
    • 한국환경과학회지
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    • 제11권2호
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    • pp.121-130
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    • 2002
  • Compare to investigate the taxonomic utility of infragenera system and interspecific of Asian Geranium, we examined the fruit and seed morphology from 35 taxa. The fruit shape and seed's dispersal way did so that may divide subgenus or some part section to do could reason evolutionary trends. That is, at seed dispersal, the awns of section Geranium of subgenus Geranium, ramains attached at the top of rostrum, though fairy easily broken off, because seed increases awn's elasticity by diffusive way, it is long characteristic seed\`s dispersal distance, and subgenus Robertium observed that seed dispersal distance is short because it is no awn's elasticity by way that seed dispersal is gone as awn drops with rostrum. Also, section Geranium of subgenus Geranium and subgenus Robertium act role that awn keeps temporarily breed swerving with mericarp instead of bristle because section Tuberosa of subgenus Geranium is not bristled function that keep temporarily breed because mericarp bristled on base at seed dispersal do while. Therefore, is thought that is talon that when consider formation's development and function regarding this seed dispersal function, subgenus Geraniuum evolves more than subgenus Robertium. Seed morphology can divide by 2 subgenera(Geranium, Robertium) according to pattern of seed coat. and Seed's morphology characteristic(whole shape, color, form of seed apical and base, micropyle area, hilum area, chalaza, and position of seed hilum area), can distinguish some species, but is thought that is not reasonable as for discernment characteristic form and nature by repetition of characteristic form and nature. Especially, infrasection do in fruit and seed's morphology that is handling in this research that know to argue classification system and relationship by repetition of characteristic form and nature difficult. To all reliable truth, cytological, ecological, embryology, and molecular genetics research about talon is considered that should be achieved section Geranium that do not handle yet.

온라인 플랫폼의 분류 프레임워크 : 국내 플랫폼 사례연구를 중심으로 (An Innovative Framework to Classify Online Platforms)

  • 강형구;강창모;전성민
    • 한국정보시스템학회지:정보시스템연구
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    • 제31권1호
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    • pp.59-90
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    • 2022
  • Purpose This paper presents a new method of classifying online platforms. It also explains how to apply the framework using case studies and generate new insight about platform strategies and policy development. Design/methodology/approach This paper focuses on the relationship between platforms, especially the hierarchy and power relations, and broadly classifies platforms as follows: content/services, meta information, app stores, operating systems, and cloud. Both the content/service platform and the meta information platform have matching as their main function. However, most content/services tend to collect and access information through meta-information platforms, so meta-information platforms are closer to infrastructure than content/service platforms. App store, operating system, and cloud can be said to be platforms of platforms. A small number of companies in the US and China dominate platforms of platforms, and become the recent development and regulatory targets of their respective governments. Findings We should be wary of the attempts to regulate domestic platforms by importing foreign regulations that ignore the hierarchical structure that our framework highlights. We believe that Korea's strategy to become a true platform powerhouse is clear. As one of the few countries with significant companies in the area of meta information platforms, it will be necessary to fully utilize the position and advance into the strategically important area of platforms of platforms. Furthermore, it is necessary to encourage world-class companies to appear in Korea in the app store, operating system, and cloud. To do so, the government needs to introduce promotion policies to strategically nurture such platforms rather than to regulate them.

Structural SVM을 이용한 백과사전 문서 내 생략 문장성분 복원 (Restoring Omitted Sentence Constituents in Encyclopedia Documents Using Structural SVM)

  • 황민국;김영태;나동열;임수종;김현기
    • 지능정보연구
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    • 제21권2호
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    • pp.131-150
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    • 2015
  • 영어와 달리 한국어나 일본어 문장의 경우 용언의 필수격을 채우는 명사구가 생략되는 무형대용어 현상이 빈번하다. 특히 백과사전이나 위키피디아의 문서에서 표제어로 채울 수 있는 격의 경우 그 격이 문장에서 더 쉽게 생략된다. 정보검색, 질의응답 시스템 등 주요 지능형 응용시스템들은 백과사전류의 문서에서 주요한 정보를 추출하여 수집하여야 한다. 그러나 이러한 명사구 생략 현상으로 인해 양질의 정보추출이 어렵다. 본 논문에서는 백과사전 종류 문서에서 생략된 명사구 즉 무형대용어를 복원하는 시스템의 개발을 다루었다. 우리 시스템이 다루는 문제는 자연어처리의 무형대용어 해결 문제와 거의 유사하나, 우리 문제의 경우 문서의 일부가 아닌 표제어도 복원에 이용할 수 있다는 점이 다르다. 무형대용어 복원을 위해서는 먼저 무형대용어의 탐지 즉 문서 내에서 명사구 생략이 일어난 곳을 찾는 작업을 수행한다. 그 다음 무형대용어의 선행어 탐색 즉 무형대용어의 복원에 사용될 명사구를 문서 내에서 찾는 작업을 수행한다. 문서 내에서 선행어를 발견하지 못하면 표제어를 이용한 복원을 시도해 본다. 우리 방법의 특징은 복원에 사용된 문장성분을 찾기 위해 Structural SVM을 사용하는 것이다. 문서 내에서 생략이 일어난 위치보다 앞에 나온 명사구들에 대해 Structural SVM에 의한 시퀀스 레이블링(sequence labeling) 작업을 시행하여 복원에 이용 가능한 명사구인 선행어를 찾아내어 이를 이용하여 복원 작업을 수행한다. 우리 시스템의 성능은 F1 = 68.58로 측정되었으며 이는 의미정보의 이용 없이 달성한 점을 감안하면 높은 수준으로 평가된다.

LIBS를 이용한 흑색 플라스틱의 자동선별 시스템 개발 (Development of Automatic Sorting System for Black Plastics Using Laser Induced Breakdown Spectroscopy (LIBS))

  • 박은규;정밤빛;최우진;오성권
    • 자원리싸이클링
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    • 제26권6호
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    • pp.73-83
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    • 2017
  • 소형가전 제품은 종류가 다양할 뿐만 아니라 구성부품의 재질도 복잡하여 폐기시 재활용이 매우 어려운 실정이다. 특히, 폐소형가전의 경우 흑색 플라스틱의 함유량이 높을 뿐만 아니라 재질이 다양하여 재활용 공정에서 발생하는 플라스틱의 재질을 인식하여 효율적으로 선별 회수하는 것이 매우 어렵다. 본 연구에서는 기존 선별기술이 가지고 있는 흑색 플라스틱의 재질별 선별에 대한 기술적 한계 및 단점을 보완하기 위하여 레이저유도붕괴분광법(Laser-Induced Breakdown Spectroscopy, LIBS)을 기반으로 하는 흑색 플라스틱의 재질별 자동선별 시스템을 개발하였다. 본 시스템은 정량 공급장치, 위치 자동인식 장치, 레이저유도기반분광분석(LIBS) 장치, 선별분리장치 및 Control unit 등으로 구성되어 있다. 레이저유도붕괴분광법(LIBS)을 이용하여 흑색 플라스틱의 재질별 특성 스펙트럼 데이터를 획득하고, 인공지능형 알고리즘을 적용한 분류기를 설계하여 적용함으로써 흑색 플라스틱의 재질을 효율적으로 인식하고 분류할 수 있다. 본 연구에서 개발한 방사형기저함수신경회로망(RBFNNs) 분류기의 분류율은 약 97% 이상으로 나타났으며, 자동선별 시스템의 흑색 플라스틱의 재질별 인식률은 약 94.0% 이상, 선별효율은 80.0% 이상으로 조사되었다. 본 연구에서는 실험실 규모의 자동선별장치를 개발하였으며, 본 장치에 대한 실험결과를 바탕으로 흑색 플라스틱 재질인식 및 선별효율 등을 분석하므로써 향후 폐소형가전의 재활용 현장에 적용할 예정이다.

광복이후 한국 공공도서관사 연구 -일제하 공공도서관제도의 영향을 중심으로- (A Study of the History of Korean Public Library after the Korean Liberation Day - An Emphasis on the influence of public Libraries System under the Japanese Imperialism-)

  • 김포옥
    • 한국문헌정보학회지
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    • 제20권
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    • pp.65-125
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    • 1991
  • The study has tried to analize and appraise how did public library system under the Japanese imperialism affect the establishment and managemant of Korean public libraries. To achieve the purpose of the above-mentioned study, the contents of $\ulcorner$Japanese library statute$\lrcorner$ under Japanese imperialism and the current $\ulcorner$Korean library law$\lrcorner$ have been mutually compared, at the same time, the vestiage of Japanese imperialism in view of the establishment, personnel administration and reading systems have been concretely investigated, analyzed and compared. The conclusions obtained from the above are as followings. 1. In those days of the Korean Liberation, the situation of Korean public libraries was such as it under the Japanese rule and so, their names were only changed. However, as a part of its independent activities, the national library have once carried out the various programs such as the training of professional librarians, the establishment of the new classification schedule and the chief Librarian and deputy Librarian from the professional librarians in the office regulations, and they were well worth being the good examples for today's Korean library circle. Though the Goverment of the Republic of Korea had been formally established, the situation of the library circle was very dull owing to the Korean war for a long time. In 1963, $\ulcorner$The Korean library law$\lrcorner$ was promulgated, but the establishment of public libraries did not give satisfactory results because of the institutional fragility. In the 1980's the importance of library was embossed from the viewpoint of life-long education and the number of libraries was increased. However, there were still the remaining vestiges of Japanese library system in the practical library services. 2. After the Korean Liberation, the influnces of public library system under the Japanese imperialism showed in the office regulation of national library and the Korea library Law were also in the legal mechanism. In particular, the regulations of $\ulcorner$The staff-member of public library$\lrcorner$ and $\ulcorner$Admission fee of public library$\lrcorner$ including the chief librarian have referred to the library system under the Japanese imperialism since the liberation day to date. 3. At that time of the Korean Liberation, the U.S.Military Government Office had decided that the public library administration should be attached to the administration of local and internal affairs in accordance with the Japanese administative system. As a result, the public libraries had been forced to be indirectly affected by public library system under the Japanese imperialism for twenty years since the Liberation. 4. Since the Liberation, the personnel adminstration of public library has been so far on the steps of model under the Japanese imperialism. As the result of the field survey, the position standards of local chief librarians, non-professional character, the extra post system and the preponderant appointment of non-professional offices have analyzed by the influence of Public library system under the Japanese imperialism. Therefore, the Government authorities-concerned must readjust the standards of qualification and the divided duties corresponding to the position of public library staff members and to stipulate expressly in the revised library law. In addition, the regulation of the admission fee should be also actively detected for the free adminssion of library users. 5. Since the Liberation Day, the reading methods of public library have been so far similar to reading method under the Japaness imperialism. For example, the admission fee levied, the complicated procedures of using books including entrance and exit of a library, no-admission system, the limited lending books, the deposit system of outdoor lending books and the surety liable jointly and severally are originally caused by bureaucracy of under the Japanese imperialism. Therefore, the public libraries should make an offer space and opportunities which can enjoy freedom to the gull in future. The procedures and standards of library users will be simplified, if possible. As the above-mentioned, the actual conditions of Korean public libraries have been examined and analyzed. As the result of it, there are still the remaining vestiges of public library system under the Japanese imperialism in the establishment and management of the nation-wide public libraries. Such the remnants are an obstacle to the democratic development of public libraries and so, the authorities-concerned should take the proper-measures as soon as possible.

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한글 외곽선 폰트의 자소 분할 (Hangul Component Decomposition in Outline Fonts)

  • 구상옥;정순기
    • 한국컴퓨터그래픽스학회논문지
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    • 제17권4호
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    • pp.11-21
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    • 2011
  • 본 논문은 한글 외곽선 폰트를 입력으로 글자의 초성, 중성, 종성 요소(컴포넌트)를 통계적-구조적 정보를 이용하여 분할하는 방법을 제안한다. 한 폰트 내에서 한글 컴포넌트는 통계적으로 일정한 위치에 나타나며, 각 컴포넌트를 이루는 획 간의 관계는 그 컴포넌트의 구조적 특징을 나타낸다. 우리는 먼저 각 컴포넌트의 위치를 저장하는 컴포넌트 히스토그램을 생성하여 컴포넌트 위치에 관한 통계 정보를 저장하였다. 그리고 글자의 구조적 정보를 반영하기 위해 픽셀의 방향성 확률을 기반으로 픽셀클러스터를 만들고, 클러스터의 위치, 방향 및 크기, 클러스터간 인접성 정보를 이용하여 후보 획을 추출하였다. 마지막으로 릴렉세이션 레이블링을 통해 후보 획 집합과 미리 정의된 글자 모델 간의 가장 적합한 구조적 매치를 구하였다. 본 논문에서 제안한 컴포넌트 분할방법은 한글 폰트의 조형적 특징에 관한 연구 및 이를 활용한 폰트분류 빛 폰트검색에 활용될 수 있다.