• Title/Summary/Keyword: city classification

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A Study on the Convergence Relativity of the Combining Curved Forms of Tall Buildings (초고층빌딩의 비정형 곡면형태 조합 및 복합관계에 관한 연구)

  • Park, Sang-Jun
    • The Journal of the Korea Contents Association
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    • v.20 no.3
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    • pp.190-199
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    • 2020
  • Globally, more super-tall buildings tend to be constructed competitively in the social and economic foundations. In the circumstance, this study is aimed at establishing a paradigm of super-tall buildings in terms of their various forms. Symbolizing a city or state, super-tall buildings not only are used as resources of tourism, but play an important role as a characteristic landmark. Therefore, it is necessary to find a curved form for a futuristic perspective. The purpose of this study is to infer the convergence relativity of curved forms among complex and diverse unstructured construction forms. This study used as subjects 50 super-tall buildings among the ranking data selected Council on Tall Buildings and Urban Habitat (CTBUH) in order for the basis of constructability related to actual design, rather than the way of recognizing a formative type, in the classification of curved forms into regularized surfaces, developable surfaces, and double-curved surfaces. The results of this study are presented as follows. This classification can be used as a fundamental material which is reasonably involved in the design process pursuing diverse curved surfaces in terms of design of tall buildings.

To Build the Spatial Database and the Classification of the Type of Pre-Redevelopment Zone of Daejeon for the Strategy of Urban Regeneration (도시재생사업에서 도시정비예정구역의 유형구분을 위한 공간 데이터베이스 구축 및 적용)

  • Choi, Bong-Moon;Cho, Byung-Ho
    • The Journal of the Korea Contents Association
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    • v.10 no.1
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    • pp.436-445
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    • 2010
  • This research was inspected on the example destination of the actual condition of Deajeon metropolitan city for the urban regeneration projects. For that purpose, the database for these sections are constructed, but the lack of the information constructing, the 202 of Deajeon urban regeneration prearranged district can be implied by the urban regeneration concrete. The physical-environment regeneration of 123 district are classified into physical purpose of the improvement, the resource management of physical regeneration core strategy point and the core elements of the environment regeneration. The society-culture regeneration is classified into the purpose of history, culture resource regeneration of 21 district. The economic-industry regeneration presents the strategy and technique of 15 district. The Mixed regeneration resents the strategy and technique of 8 district.

Optimize TOD Time-Division with Dynamic Time Warping Distance-based Non-Hierarchical Cluster Analysis (동적 타임 워핑 거리 기반 비 계층적 군집분석을 활용한 TOD 시간분할 최적화)

  • Hwang, Jae-Yeon;Park, Minju;Kim, Yongho;Kang, Woojin
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.20 no.5
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    • pp.113-129
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    • 2021
  • Recently, traffic congestion in the city is continuously increasing due to the expansion of the living area centered in the metropolitan area and the concentration of population in large cities. New road construction has become impossible due to the increase in land prices in downtown areas and limited sites, and the importance of efficient data-based road operation is increasingly emerging. For efficient road operation, it is essential to classify appropriate scenarios according to changes in traffic conditions and to operate optimal signals for each scenario. In this study, the Dynamic Time Warping model for cluster analysis of time series data was applied to traffic volume and speed data collected at continuous intersections for optimal scenario classification. We propose a methodology for composing an optimal signal operation scenario by analyzing the characteristics of the scenarios for each data used for classification.

Forest Vertical Structure Classification in Gongju City, Korea from Optic and RADAR Satellite Images Using Artificial Neural Network (광학 및 레이더 위성영상으로부터 인공신경망을 이용한 공주시 산림의 층위구조 분류)

  • Lee, Yong-Suk;Baek, Won-Kyung;Jung, Hyung-Sup
    • Korean Journal of Remote Sensing
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    • v.35 no.3
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    • pp.447-455
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    • 2019
  • Since the forest type map in Korea has been mostly constructed every five years, the forest information from the map lacks up-to-date information. Forest research has been carried out by aerial photogrammetry and field surveys, and hence it took a lot of times and money. The vertical structure of forests is an important factor in evaluating forest diversity and environment. The vertical structure is essential information, but the observation of the vertical structure is not easy because the vertical structure indicates the internal structure of forests. In this study, the index map and texture map produced from KOMPSAT-3/3A/5 satellite images and the canopy information generated by the difference between DSM (Digital Surface Model) and DTM (Digital Terrain Model) were classified using the artificial neural network. The vertical structure of forests of single and multi-layer forests was classified to identify 81.59% of the final classification result.

Comparison with in-hospital Korean Triage and Acuity Scale (KTAS) and prehospital triage system in a metropolitan city (일개 대도시의 병원전 단계와 병원 단계의 중증도 분류체계 간의 결과 분석)

  • Choi, Hyo Jeong;Kim, Ho Jung;Lee, Hyo Ju;Lee, Bo Ra
    • Journal of The Korean Society of Emergency Medicine
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    • v.29 no.5
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    • pp.391-398
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    • 2018
  • Objective: This study was conducted to analyze and compare the classifications of a prehospital triage system and an in-hospital triage system. Methods: The records of patients transferred from the '119' emergency service for 5 months (from January 1 to May 31, 2016) were collected and records of first aid activities were assessed. We examined cases classified as four (urgent, semi-urgent, potentially urgent, and non-urgent) of five stages, excluding death. In the hospital, data were collected from medical records and classifications made using the five Korean Triage and Acuity Scale (KTAS) stages (1, resuscitation; 2, emergency; 3, urgent; 4, less urgent; and 5, non-urgent) were analyzed. Results: The number of patients enrolled in the study was 3,457. Of them, 2,301 were discharged after treatment and 1,156 were hospitalized. According to the prehospital triage classification, 726 of the 3,457 cases were urgent, 593 were semi-urgent, 1,944 were potentially urgent, and 194 were non-urgent. The results of the in-hospital triage were as follows: 114 KTAS 1 (3.3%), 491 KTAS 2 (14.2%), 1,345 KTAS 3 (38.9%), 1,227 KTAS 4 (35.5%), and 280 KTAS 5 (8.1%). The odds ratio trend for hospitalization showed a larger decrease according to in-hospital staging (95% CI, 0.32-0.39) than according to prehospital staging (95% CI, 0.50-0.60). The odds ratio trend for intensive care unit (ICU) admission also showed a larger decrease according to in-hospital staging (95% CI, 0.16-0.22) than according to prehospital staging (95% CI, 0.37-0.48). Conclusion: We found little correspondence in classifications made according to the KTAS and prehospital triage systems. However, the tendencies toward decreases in the hospitalization and ICU admission rates were similar.

Basic Study on Logical Model Design of Underground Facilities for Waterworks (상수도 지하시설물의 논리적 모델 설계에 관한 기초 연구)

  • Jeong, Da Woon;Yu, Seon Cheol;Min, Kyung Ju;Lee, Ji Yeon;Ahn, Jong Wook
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.38 no.6
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    • pp.533-542
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    • 2020
  • This study proposes the logical data model design of a spatial data model that complies with international standards for the waterworks of underground facilities. We conduct a preliminary study related to underground spatial data standards and data models, and review the status of the existing systems. Then, we defined the conceptual design direction of underground spatial data model based on the problems and issues. Next, we defined the terminology, classification, semantic relationships of waterworks. Next, for the conceptual design of the underground spatial data model, we defined the naming criteria for all data according to the waterworks classification. In addition, a logical model is drawn and described using UML (Unified Modeling Language) diagrams. Based on the results, it is expected that the accuracy related to underground facilities data will be improved.

Analyzing Spatial Patterns of Manufacturing Employment of the Disaster Safety Sector in South Korea (우리나라 재난안전분야의 제조업 고용 공간패턴 분석)

  • Kim, Geunyoung
    • Journal of the Society of Disaster Information
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    • v.18 no.2
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    • pp.351-363
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    • 2022
  • Purpose: The objective of this research is to find manufacturing employment clusters of the disaster safety sector in South Korea. Method: The LISA(Local Indicator of Spatial Association) analysis method is applied to the employment data of 229 local governments categorized by the 2019 Korean Standard Industry Classification and Disaster Safety Industry Special Classification. The LISA method identifies the spatial dependency of employment and the spatial cluster of industries. Result: Three research findings are summarized. First, employment of the disaster safety industry in South Korea occupies about six percent of the total manufacturing industry. The annual proportion is in increasing trend. Second, the employment cluster of the disaster safety industry is located in the western side of the Seoul metropolitan region. Third, manufacturing businesses of industrial safety goods preventing industrial accidents are concentrated in regions of Busan, Ulsan, Changwon, Gyeongnam, and Gimhae, where heavy and chemical industries and industrial complexes are formed. Conclusion: Investment and promotion policies are suggested to the manufacturing employment clusters of the disaster safety industry for fostering these regions. Research results can be used to the better policies for industrial development and employment improvement of manufacturing clusters of the disaster safety industry in South Korea.

Extracting Road Points from LiDAR Data for Urban Area (도심지역 LiDAR자료로부터 도로포인트 추출기법 연구)

  • Jang, Young Woon;Choi, Yun Woong;Cho, Gi Sung
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.28 no.2D
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    • pp.269-276
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    • 2008
  • Recently, constructing the database of road network is a main key in various social operation as like the transportation, management, security, disaster assesment, and the city plan in our life. However it need high expenses for constructing the data, and relies on many people for finishing the tasks. This study proposed the classification method for discriminating between the road and building points using the entropy theory, then detects the classes as a expecting road from the classified point group using the standard reflectance intensity of road and the characteristics restricted by raw. Hence the main object of this study is to develop a method which can detect the road in urban area using only the LiDAR data.

Atmospheric Characteristics of Fog Incidents at the Nakdong River : Case Study in Gangjeong-Goryeong Weir (낙동강 유역 안개 발생시 기상 특성: 강정고령보 사례를 중심으로)

  • Park, Jun Sang;Lim, Yun-Kyu;Kim, Kyu Rang;Cho, Changbum;Jang, Jun Yeong;Kang, Misun;Kim, Baek-Jo
    • Journal of Environmental Science International
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    • v.24 no.5
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    • pp.657-670
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    • 2015
  • Visibility and Automatic Weather System(AWS) data near Nakdong river were analyzed to characterize fog formation during 2012-2013. The temperature was lower than its nearby city - Daegu, whereas the humidity was higher than the city. 157 fog events were observed in total during the 2 year period. About 65% of the events occurred in fall (September, October, and November) followed by winter, summer, and spring. 94 early morning fog events of longer than 30 minutes occurred when south westerly wind speed was lower than 2 m/s. During these events, the water temperature was highest followed by soil surface and air temperatures due to the advection of cold and humid air from nearby hill. The observed fog events were categorized using a fog-type classification algorithm, which used surface cooling, wind speed threshold, rate of change of air temperature and dew point temperature. As a result, frontal fog observed 6 times, radiation 4, advection 13, and evaporation 66. The evaporation fog in the study area lasted longer than other reports. It is due to the interactions of cold air drainage flow and warm surface in addition to the evaporation from the water surface. In particular, more than 60% of the evaporation fog events were accompanied with cold air flows over the wet and warm surface. Therefore, it is needed for the identification of the inland fog mechanism to evaluate the impacts of nearby topography and land cover as well as water body.

Etymological Explanation of the Scientific Names for Trees and the Foreign Names of Them(II) (수목학명(樹木學名)의 어원구명(語源究明) 및 외국명(外國名) 조사(調査)(제(第)2보(報)))

  • Kim, Jyeung Gook
    • Journal of Korean Society of Forest Science
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    • v.31 no.1
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    • pp.53-61
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    • 1976
  • Though it is not easy for those who study dendrology to memorize all the scientific names of trees, the names remaines in their memory can facilitate the understanding of foreign technical books. The scientific name of a tree indicates characteristics of shape, color, and other aspects of the tree and by analyzing the name we can see common element found in other scientific names of trees. It is helpful to those who want to memorize and study the scientific names of trees if they understand their etymology. The preseut study is the seconds report of the investigation which aims at examining the etymology of the scientific names of native and foreign trees growing in Korea and their original names not only at the habitat but in Japan, China, England, Germany, and France. While the first report, which was made known in Theses Vol. 9. (The City College of Seoul 1975), is the examination of the scientific names of trees belonging to Gymnospermae, the present report is that of scientific names of trees belonging to Piperales: 2 families, 2 genera and 2 species; and trees belonging to Salicales: 1 family, 3 genera, 44 species, 16 varieties, and 3 forms. As the etymology of the scientific names of trees is made clear, this study will help those who want memorize the scientific names and study foreign technical books and it is also useful for international interchange of trees. The classification is depended chiefly on Dendrology by Prof. Lee Tchang-bok and "Plant Resources of Korea" shown in Biblography No. 10; the native names of trees on Jumoku Daizusetsu by Dr. Uehara; and etymology on A source-Book of Biological Names and Terms by E.C. Jager. In the column of etymology of the scientific names for genera, species, varieties and forms, Gr. stands for Greek, L. for Latin, NL. for New Latin, and genit. for genitive.

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