• Title/Summary/Keyword: 소분류

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New Input Keyword Extraction of Equipments Involved in Ignition Using Morphological Analysis (형태소 분석을 이용한 발화관련 기기의 새로운 입력 키워드 추출)

  • Kim, Eun Ju;Choi, Jeung Woo;Ryu, Joung Woo
    • Fire Science and Engineering
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    • v.28 no.2
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    • pp.91-97
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    • 2014
  • New types of fire accidents appear or the existing types disappeared because of rapidly changing society. We proposed a methodology of extracting new nouns from fire investigation data each of which is an accident report producted by fire investigators. The new nouns could be used in modifying the existing categories for classifying fire accidents. We analysed morphology of the product names and the ignition summaries using the proposed method for the fire accidents classified as the etc sub-category of the category of equipments involved in ignition. In this paper, we found "dryer" as a new sub-category of the agricultural equipment category and "boiler" in the seasonal appliance category from the product names of the fire accidents. We also extracted the new input keywords of "aquarium" and "monitor" in the commercial facilities category and the video, audio apparatus category from the ignition summaries respectively. Using the four subcategories, we reclassified 548 (14.39%) of 3,808 fire accidents assigned to the etc sub-category.

A Comparative Study on the Agglomerative and Divisive Methods for Hierarchical Document Clustering (계층적 문서 클러스터링을 위한 응집식 기법과 분할식 기법의 비교 연구)

  • Lee, Jae-Yun;Jeong, Jin-Ah
    • Proceedings of the Korean Society for Information Management Conference
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    • 2005.08a
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    • pp.65-70
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    • 2005
  • 계층적 문서 클러스터링에 있어서 실험집단에 따라 응집식 기법과 분할식 기법의 성능이 다르며, 이를 좌우하는 요소는 분류의 깊이, 즉 분류수준이라고 가정하였다. 조금만 나누면 되는 대분류인 경우는 상대적으로 분할식 기법이 유리하고, 조금만 합치면 되는 소분류인 경우에는 응집식 기법이 유리할 것이라고 판단했기 때문이다. 그에 따라 분할식 클러스터링 기법인 양분(Bisecting) K-means기법과 응집식 기법인 완전연결, 평균연결, WARD기법의 성능을 실험집단이 대분류인 경우와 소분류인 경우의 유사계수를 적용하여 각 기법별 성능을 비교하여 실험집단의 특성에 따른 적합 클러스터링 기법을 찾고자 하였다. 실험결과 응집식 기법과 분할식 기법의 성능 우열에 영향을 미치는 것은 분류수준보다는 변이계수로 측정된 상대적인 군집의 크기 편차인 것으로 나타났다.

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The Suggestion for Classification of Biotope Type for Nationwide Application (전국적 적용을 위한 비오톱유형분류 제안)

  • Choi, Il-Ki;Oh, Choong-Hyeon;Lee, Eun-Heui
    • Korean Journal of Environment and Ecology
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    • v.22 no.6
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    • pp.666-678
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    • 2008
  • The needs for drawing up of biotope map is rapidly spreaded over each local government recently in Korea, according as enhancing of interest about biotope, which is recognized to practical instrument for concretely being able to considering natural environment and ecosystem on all sorts of development plan. However, there are not yet the standard suggestion on biotope types and classification systems and biotope classification criteria. Therefore, each other methodologies are applied to each of local autonomies. First, under such critical mind the biotope types and classification systems were drafted by a review on biotope types, biotope classification systems, and biotope classification criteria of the preceded case studies until now at the inside and outside of the country. And then the purpose of this study is to derive biotope types and biotope classification systems applicable to the whole Korean region through continual feed back such as field surveys in selected representative areas and consultations. As a result of reviewing the case examples, first, the biotope classification systems were mixed two steps system with three steps system and those were composed mostly of the structure of two steps: large and small. Second, land-use, soil pavement ratio, green cover ratio, and vegetation usually were applied to the biotope classification criteria. This study suggests that the biotope classification system is consisted of four steps system: large(biotope class), medium(biotope group), small(biotope type) and detail(sub-biotope type), and the biotope types are classified into 13 types of large step, 45 types of medium step and 127 types of small step. However, this study suggests that the new biotope types on small step or detail step should be continually supplemented with the foundation of classification system proposed in this study because the biotope type classification should consider regional characteristics.

Using collaborative filtering techniques Mobile ad recommendation system (협업필터링 기법을 이용한 모바일 광고 추천 시스템)

  • Kim, Eun-suk;Yoon, Sung-dae
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2012.10a
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    • pp.3-6
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    • 2012
  • Due to recent rapid growth of mobile market, the modern people increasing make use of mobile contents as a means to obtain the desired information quickly by overcoming various restraints of a computer. The wide range of recommended contents, however, takes much time in selection of contents. To resolve such issues, a system that predicts the contents desired by the user and makes an accurate recommendation is necessary. In this paper, in order to provide the desired contents in line with the user demands, a method to increase select the number of recommendation using cooperative filtering is proposed. In the first step, the categories are formulated with super-classes and the similarity between the target customer and users is found, and the nearest-neighbors are constituted to find the preference predictions between super-classes, and the super-class with the highest resulting value is recommended to the target customer. In the second step, the preference predictions between sub-classes are found and the sub-class with the highest value is recommended to the target customer. In the experiment, mobile contents are recommended through super-class-based cooperative filtering, and then the mobile contents are recommended through sub-class-based cooperative filtering, and sub-class collaborative filtering method to select a high number of verification.

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Analysis on the patent of DTV techniques (디지털TV 기술의 특허 현황과 전망)

  • 원성구;최성진;이선희;이광직
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2002.11a
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    • pp.315-318
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    • 2002
  • 본 논문에서는 한국 미국, 유럽, 일본에서 출원된 디지털TV 기술에 관한 특허를 분석하였다. 먼저 디지털TV 기술의 분류는 대분류 4가지, 중분류 15가지, 소분류 40여가지로 하였으며, 조사 대상 특허 수는 IPC, UPC, G7에 1981년부터 2002년 4월까지 게재된 특허를 중심으로 한국 3,462건, 일본 2,358건, 유럽 1,596건, 미국 3,216건을 추출하였다. 이들 특허들에 관해 본 논문에서는 전체적인 특허 동향을 분석하고, 각국마다 대분류 및 중분류에 따른 특허 현황을 분석함으로서 국내에 취약한 기술부분을 도출하였다.

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A Comparison Study for Wheelchair Seating System between Wheelchair Users with Cerebral Palsy and Spinal Cord Injuries (외상성 척수손상장애인과 뇌성마비장애인의 맞춤형 전동휠체어 적용 시 착석시스템의 차이에 대한 연구)

  • Yoo, S.M.;Cho, K.R.;Lim, M.J.;Kim, J.B.
    • Journal of rehabilitation welfare engineering & assistive technology
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    • v.3 no.1
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    • pp.49-53
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    • 2009
  • In this paper, we compared wheelchair seating system between wheelchair users with cerebral palsy and spinal cord injuries. Wheelchair seating system is divided into three parts, seating components, seating cushion, and special functions. Seating components are composed of 10 sections, such as headrest, footrest, etc. There are 4 seating cushions including gel, form, hybrid, and air. Also leg elevation, seat elevation, tilt-in-space, reclining, and standing are special function of the wheelchair. There are 10 wheelchair users, 5 with celebral palsy, and 5 with spinal cord injuries who have participated in this study. 10 wheelchair users have been customers of rehabilitation technology center in national rehabilitation center. On the result, SCI group mostly uses headrest, and Humeral blocks (seating components), air cushion (seating cushion), and tilt in space, reclining (special functions). On the other hand, CP group uses adductor, abductor, and pommel (seating components), form cushion (seating cushion), and some of CP group uses reclining (special functions)

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A Study on Knowledge Classification of Cadastral Science (지적학의 학문분류체계에 관한 연구)

  • Kworn, Kie-Won;Kim, Bee-Yeon
    • Journal of the Korean Society for Library and Information Science
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    • v.40 no.1
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    • pp.39-57
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    • 2006
  • Cadastral Science has not been evaluated as an independent discipline according to Code of Research Fields of Korea Research Foundation. The purpose of this study is to find the problems of knowledge classification of Cadastral Science and suggest method of improvement. For the studying, analyzes the definition, objects of research, educational system and curriculum of Cadastral Science. Besides, investigates the condition of Cadastre classification on Code of Research Fields, DDC and KDC. This paper suggests that Cadastral Science can be restructured to the new Interdisciplinary Studies and moved to the upper division. The items of division and subdivision can be also added.

Risk Assessment with the Development of CAES (Compressed Air Energy Storage) Underground Storage Cavern (CAES(Compresses Air Energy Storage) 지하 저장 공동 개발에 따른 리스크 사정)

  • Yoon, Yong-Kyun;Seo, Saem-Mul;Choi, Byung-Hee
    • Tunnel and Underground Space
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    • v.23 no.4
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    • pp.319-325
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    • 2013
  • The objective of this study is to assess risks which might occur in connection with the storage of the highly compressed air in underground opening. Risk factors were selected throughout literature survey and analysis for the characteristic of CAES. Large risk factors were categorized in three components; planning and design phase, construction phase, and operation & maintenance phases. Large category was composed of 8 medium risk groups and 24 sub-risks. AHP technique was applied in order to analyze the questionnaires answered by experts and high-risk factors were selected by evaluating the relative importance of risks. AHP analysis showed that the operation & maintenance phases are the highest risk group among three components of large category and the highest risk group of eight medium risk groups is risk associated with the quality and safety. Risk having the highest risk level in 24 sub-risks is evaluated to be a failure of tightness security of inner containment storing compressed air.

An convergence analysis of patent toothbrush (칫솔에 대한 특허 융합분석)

  • Moon, Kyung-Hui;Jeong, Mi-Kyoung;Kim, Jang-Mi
    • Journal of the Korea Convergence Society
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    • v.10 no.7
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    • pp.55-62
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    • 2019
  • This study analyzed 467patent for toothbrush that used for oral hearlth, registered for 10years from 2008 to 2017 at KIPRIS which can search patent. Based on the toothbush composition, 8categories were detailed information was subdivided. As a result showed that the most patents were patent for toothbrush bristle, patent for additional function, patent for electronic toothbrush, patent for toothbrush's head, patent for toothbrush in different form, patent for toothbrush's neck, patent for learning of brushing habits, patent for toothbrush's handle. The patent that has a variety of the section was a patent for additional function, the patent for toothbrush bristle was the highest that is 25 in 2012. The only increasing number of patents compared to toothbrush patents, which are decreasing slightly in 2017, was the Patent for learning of brushing habits and the patent for toothbrush's handle. As a result, from 2009, the number of patents for toothbrushes has increased and varied.

Automatic Photograph Classification Using Geographical Information (지리정보를 이용한 자동사진분류)

  • Hong, Young-Jin;Kim, Seong-Woon;Yoo, Myung-Hyun;Lee, Yong-Beom;Kim, Sang-Ryong
    • 한국HCI학회:학술대회논문집
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    • 2006.02a
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    • pp.692-698
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    • 2006
  • 점점 더 많은 디지털 카메라와 휴대폰이 고해상도 카메라가 장착되고 대용량의 저장공간이 제공되면서 사용자들의 사진촬영 빈도가 증대하고 있다. 조만간 휴대폰의 저장된 사진을 효과적으로 관리하고 브라우징할 수 있는 기술이 필요한 시기가 올 것이다. 본 논문은 휴대폰이나 디지털 카메라 혹은 카메라가 장착되어 사진을 찍을 수 있는 모든 형태의 휴대단말에서 촬영된 개인사진을 지리적 위치정보를 이용하여 자동으로 분류하는 시스템을 제시한다. 기존의 시간정보를 이용하여 촬영시간의 근접성을 이용해 순차적으로 자동 분류하는 시스템과는 달리 위치정보를 이용하여 촬영위치에 따라 비순차적으로 자동 분류한다. 촬영위치 근접성을 결정하기 위해 밀도기반 클러스터링 알고리즘을 사용하여 전체 사진을 대분류하고 기존의 자동사진 분류방식에서는 다루지 않았던 일상사진과 비일상사진을 분류하고, 대분류된 사진을 시간정보를 이용하여 소분류 함으로서 자동 사진분류 성능을 높이고자 한다.

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