• 제목/요약/키워드: Geographical data

검색결과 1,488건 처리시간 0.033초

Comparing NDVI to maximum latewood density of annual tree rings in a boreal coniferous forest in North China

  • He, Jicheng;Shao, Xuemei;Wang, Lili
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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    • pp.34-36
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    • 2003
  • In boreal conifers in China's Northeast area, maximum latewood density (MXD) of tree-ring varies in response to growing season temperature. Forest net productivity can be estimated using the Normalized-difference Vegetation Index (NDVI) calculated from satellite sensor data. MXD from the Mohe site in this area was compared with estimates of NPP for 1982-1999 produced by the NDVI model, which was established based on the relationship of leaf area index (LAI) and NDVI. The result shows that the MXD series correlated significantly with the NDVI model estimates series, suggesting that MXD appeared to be an appropriate index for productivity or canopy growth in region where forest productivity is strongly temperature-related.

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Conservation of Dermaptra in Youngnam Region I. Choosing Priority Area by Taxonomic Root Weighting and Dsitribution Analysis

  • 윤일병;문태영
    • Animal cells and systems
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    • 제1권2호
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    • pp.305-311
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    • 1997
  • Dermaptera was investigated, examined and reviewed in taxonomy and for distribution in Youngnam region. Based on the data, the local species groups were measured to choose priority-conservation-area by taxonomic root weighting and distribution analysis at 232 geographical conservation units. Eleven species belonging to 4 families and 8 genera were recorded mounting up to 68.75% of species diversity known in Korea. Found remarkably were the rare and endangered Challia fletcheri Burr at Sobaek Mountain National Park, and unusually Anisolabis maritima (Bonelli) in Taegu, Euborellia pallipes (Shiraki) at Island Geoje and E. plebeja (Dohrn) at Hwanho near Pohang. The highest species diversity was found at the temple Huibang area at Sobaek Mountain National Park with 8 species, which was measured also as the primary priority-conservation-area with 83.41 % of accumulated taxonomic root weighting indices in percentage. Geoje and Hwanho both measured as 12.18% of accumulated taxonomic root weighting index in percentage and complimentary to Sobaek Mountain National Park but supporting 5 and 3 species, respectively. The priority goes to the geographical conservation unit supporting higher species richness between two geographical conservation units in comparison. By the rule, the second priority-conservation-area should be Geoje and the third Hwanho. It is, thus, demonstrated how 11 species can be all conserved by choosing 3 priority-conservation-areas out of 232 geographical conservation units to maintain maximum species in minimum areas.

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노인복지 수요예측을 위한 노인 인구의 공간적 분석 - GIS를 이용한 농촌인지적 접근 - (Geographical Distributions of the Aged population in Korea - Rural-specific approach with GIS -)

  • 이정화;박공주
    • 한국지역사회생활과학회지
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    • 제15권2호
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    • pp.137-150
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    • 2004
  • The aged population in Korea, especially in rural areas, has been growing rapidly. The welfare for the rural elderly has become a major concern, however we don't have enough information about that population; we don't even have detailed demographics of it. The present research is aimed at; 1) investigating the tendency and changing geographical distributions of the rural elderly, and 2) introducing GIS(Geographic Information Systems) as a useful tool in analyzing geographical distributions of the aged. The General Census Data from 1960 to 2000 was used to carry out this study. The major findings are; 1) There has been a gradual decrease in the rural population over the past 40 years, but this tendency has slowed down more recently; 2) It was observed that the 'oldest-old' group aged 85 years old and over has actuality increased in rural areas faster than any other age group; 3) The changing patterns of the elderly population were different in metropolitan areas and rural areas. In brief, there are far more aged people, especially of the 'oldest-old' group and females in rural areas than those in urban areas. These population, the 'oldest-old' or females, are the most vulnerable and have the greatest need for social welfare and social services of different kinds.

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Monitoring Flood Disaster Using Remote Sensing Data

  • Chengcai, Zhang;Xiuwan, Chen;Gaolong, Zhu;Wenjiang, Zhang;Peng, Sun-Chun
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 1998년도 Proceedings of International Symposium on Remote Sensing
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    • pp.280.2-286
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    • 1998
  • Flood is the main natural disaster mostly in the world. It is a care problem to prevent flood disaster generally. The frequency of flood disaster is high and the distributing field is wide, the 50 percent population and 70 percent properties distribute at the threaten field of flood disaster in China. Flood disaster has caused a huge amount of economical losses and these losses have an increasing trend. Along with the development of reducing natural disaster action, it has become one of the most attentive problems for monitoring flood, preventing flood and forecasting flood efficiently. Remote sensing has the characteristics of large spatial observing areas, wide spectrum ranges, and imaging far away from the targets, imaging capabilities all weather. Spatial remote sensing information, which records the full, processes of the disaster's occurrence and development in real-time. It is a scientific basis for management, planning and decision-making. Through systemic analyzing the RS monitoring theory, based on compounding RS information, the technology and method of monitoring flood disaster are studied.

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센서 네트워크에서 무선채널환경을 고려한 위치기반라우팅기법 (Geographical Routing Scheme Considering Channel Condition in WSN)

  • 심인보;이재용
    • 한국통신학회논문지
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    • 제34권7B호
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    • pp.694-702
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    • 2009
  • 센서네트워크에서 각 노드가 오직 자신의 이웃 노드에 대한 위치정보만을 가지고 라우팅 경로를 설정하는 위치 기반 라우팀은 확장성에 있어 매우 효과적인 프로토콜이다. 그러나 순수한 위치기반 라우팅은 채널상태를 고려하지 않는다. 채널상태를 고려하지 않는다면, 라우팅 테이블이 업데이트될 때 채널상태가 좋지 않은 노드가 라우팅 테이블에 업데이트 되어 릴레이 노도로 선택되어질 수 있다. 이것은 에러로 인한 재전송을 유발하게 되고 이러한 재전송 때문에 추가의 에너지가 소비되게 된다. 이러한 사실로부터, 본 논문에서는 위치기반 라우팅에서 채널상태를 고려함으로 신뢰성 있는 데이터 전송을 보장하고 소비되는 에너지를 최소화 할 수 있는 라우팅 방법을 제시하였다.

섬 관광객의 지리적 시장세분화에 관한 연구 (A Study on Geographical Market Segmentation of Island Tourists)

  • 이진희
    • 수산경영론집
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    • 제49권4호
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    • pp.53-68
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    • 2018
  • The industrial structure of Chuja Island is mainly occupied by fisheries. Since the fisheries resources have been depleted and the marine environment has been changed, the fishery industry has been hard to survive. It is the time when residents are looking for a breakthrough in the tourism industry. Market segmentation is a valuable tool in the establishment of marketing strategies. Segmentation of tourists by the same desire and motivation is an essential factor in identifying the characteristics of tourists. The research on market segmentation of tourism sector focuses mainly on demographic subdivision, psychological subdivision, and behavioral subdivision, so it is urgent to study geographical market segmentation. The purpose of this study is to present data that can be used to establish a marketing strategy for tourism promotion in Chuja Island by analyzing the tourism activities via subdivision market according to demographic characteristics, tourism behavior characteristics, and tourism motivation after grasping the geographical segment of tourists through empirical analysis. In this study, 285 valid samples were analyzed by frequency analysis, ${\chi}^2$ test, cluster analysis and ANOVA test.

Legal Protection Of Geographic Indications Of Traditional Food "Tahu Kuning Kediri" Jawa Timur, Indonesia

  • WAHYUNI, Niniek;WIDAYATI, Satriyani Cahyo
    • Asian Journal of Business Environment
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    • 제11권2호
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    • pp.39-46
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    • 2021
  • Purpose: The purpose of this study was to determine the opportunity for the traditional food of Tahu Kuning Kediri (Kediri Yellow Tofu) as a product that deserves legal protection in the form of geographic indications. Methodology: This research is a normative juridical study that emphasizes secondary data from literary studies. The research subjects are policies and regulations related to geographic indications. Findings: Based on the description above, it can be concluded that the traditional food of 'Tahu Kuning Kediri' meets the requirements for legal protection in the form of a geographical indicator because it fulfills four conditions, namely a sign indicating its origin, GI objects in the form of goods and/or products, geographical factors and certain characteristics of goods and/or products that are different from other traditional regional yellow tofu food. Conclusions: The process of applying for legal protection in the form of geographic indications can be carried out by the association of MSMEs of 'Tahu Kuning Kediri' producers who are already legal in collaboration with the local government and submit to the Ministry of Law and Human Rights by attaching the proposed Geographical Indication book.

산지재해 위험성 분석을 위한 지상 LiDAR 지형자료 구축에 관한 연구 (Study on the Terrestrial LiDAR Topographic Data Construction for Mountainous Disaster Hazard Analysis)

  • 전계원;오채연
    • 한국안전학회지
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    • 제31권1호
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    • pp.105-110
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    • 2016
  • Mountainous disasters such as landslides and debris flow are difficult to forecast. Debris flow in particular often flows along the valley until it reaches the road or residential area, causing casualties and huge damages. In this study, the researchers selected Seoraksan National Park area located at Inje County (Inje-gun), Gangwon Province-where many mountainous disasters occur due to localized torrential downpours-for the damage reduction and cause analysis of the area experiencing frequent mountainous disasters every year. Then, the researchers conducted the field study and constructed geospatial information data by GIS method to analyze the characteristics of the disaster-occurring area. Also, to extract more precise geographic parameters, the researchers scanned debris flow triggering area through terrestrial LiDAR and constructed 3D geographical data. LiDAR geographical data was then compared with the existing numerical map to evaluate its precision and made the comparative analysis with the geographic data before and after the disaster occurrence. In the future, it will be utilized as basic data for risk analysis of mountainous disaster or disaster reduction measures through a fine-grid topographical map.

XML 기반의 GML 문서 저작 시스템 설계 (A Design of GML document editing system based on XML)

  • 학일명;방진숙;조극양;최봉규;우뢰;정회경
    • 한국정보통신학회:학술대회논문집
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    • 한국해양정보통신학회 2008년도 춘계종합학술대회 A
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    • pp.531-534
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    • 2008
  • 최근 지리 정보에 대한 관심과 지리 정보의 활용 분야가 다양해짐에 따라, 지리 정보를 효율적으로 관리하기 위해 다양한 지리정보 시스템(GIS : Geographic Information System)이 구축되었다. 그러나 지리정보 시스템간의 상호운용성 부재로 인해 OGC(Open Geospatial Consortium)는 상호운용 가능한 지리정보 데이터를 기술하는 XML(extensible Markup Language) 기반의 CML(Geography Markup Language)을 표준화하였다. 지리공간정보를 인코딩하는 GML 국제표준은 현재 다양한 응용분야에 적용되어 표준으로써의 효용성이 확인되고 있다. 이에 본 논문에서는 GML 3.2.1 인코딩 표준을 명시하는 OGC 권고안의 요구사항에 따라 기존의 XML 표준 기술을 사용하여 상호운용 가능한 GML 데이터를 생성하는 GML 문서 저작 시스템을 설계하였다.

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트위터 기반 이벤트 탐지에서의 기계학습을 통한 지명 노이즈제거 (Geographical Name Denoising by Machine Learning of Event Detection Based on Twitter)

  • 우승민;황병연
    • 정보처리학회논문지:소프트웨어 및 데이터공학
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    • 제4권10호
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    • pp.447-454
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    • 2015
  • 본 논문에서는 트위터 기반 이벤트 탐지에서의 기계학습을 통한 지명 노이즈제거 방식을 제안한다. 최근 스마트폰 이용자의 증가로 소셜 네트워크 서비스(SNS) 이용자가 증가하고 있는 추세이다. 그중 트위터는 140자 이내의 단문서비스와 팔로우 기능으로 정보의 빠른 전달력과 확산성을 가지고 있다. 이러한 특성과 모바일에 최적화된 트위터의 특성상 정보 전달 속도가 매우 빠르기 때문에 재난 상황이나 이벤트 전달의 매개체 역할을 하고 있다. 이와 관련된 연구로는 트위터 사용자 개개인을 이벤트 탐지의 센서로 사용하여 현실에서 발생하는 이벤트를 탐지하였는데 이벤트가 특정 장소에서 발생한다는 특성을 이용해서 지명 키워드를 사용하였다. 그러나 지명과 동형이의어 관계에 관한 노이즈제거에 대한 부분이 누락되어있어서 이벤트 탐지의 정확도를 낮추는 요인이 된다. 이에 본 논문에서는 제거와 예측 두 가지 방식으로 노이즈제거 기법을 적용하였다. 먼저 노이즈 관련 데이터베이스 구축을 이용하여 제거 필터링을 진행한 후에 나이브 베이지안 분류를 이용해서 지명 유무를 결정하였다. 실험 데이터를 이용해서 기계학습을 위한 확률값을 구했으며, 지명마다 본 논문에서 제시하는 예측기법을 검증했을 때 89.6%의 신뢰도로 노이즈제거 기법의 필요성을 보였다.