• Title/Summary/Keyword: Urban regions

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An Analysis of Changing River Sections Using GIS Spatial Analysis - Nonsan River - (공간분석기법을 이용한 하천단면 변화분석 - 논산천을 대상으로 -)

  • Lee, Jae-Yil;Lee, Gyu-Sung;Ha, Sung-Ryong
    • Journal of Environmental Impact Assessment
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    • v.19 no.1
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    • pp.91-97
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    • 2010
  • The systematic data management system in the area of river flow analysis has not yet constructed, even though the need is evident due to the complicated process of tremendous input/output data in the modeling study and the importance of visualization of spatial flow variation. The objectives of this study are to suggest the method for analysis of changing river sections affecting ecological habitat characteristics. The effects of ecological habitat characteristics are assessed with respect to changing river sections. A GIS special analysis is created representing in the past section of Nonsan-river using historical data. Topographic surfaces are subject to erosional and depositional forces that a specific set of surface characteristics unique to elevation data. GIS spatial analyst is used to generate surface grids from historical point data. Using the GIS spatial analyst can be constructed sections for anywhere of river. The change of depth between 1979 and 1988, the left bank elevations of a river are increased about 1.5m. But the right bank elevations of a river are decreased about 2.3m caused by erosion. In addition, the change of spatial between 1988 and 2002, the regions of a river from upper stream to midstream are decreased the elevation. But the downstream regions are increased the elevation. These changes are analyzed in GIS program to assess methods for affecting ecological habitat.

Characterizing Social Welfare Index between Urban and Rural Regions in China: An Application of Principal Component Analysis (중국의 도농 간 사회후생지표 특성에 관한 연구: 주성분분석에 의한 접근)

  • Rhee, Hyun-Jae
    • The Journal of the Korea Contents Association
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    • v.17 no.7
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    • pp.371-383
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    • 2017
  • The aim of this paper is to investigate adjusting process of trade-off relationship between economic growth and income distribution in China which is established by mixed with social and market-oriented economic systems. The characteristic nature of social welfare index in urban and rural regions in China is examined by employing principal component analysis. Empirical evidences reveal that unlike national wide or urban region, the increases of income contribute to improve social well-being in rural region, but not social welfare index. Accordingly, it can be said that although social well-being in rural region seems to be harmful because of weakly organized social welfare index, the potentiality exists to improve social well-being by increased income. Taken all together, the results signifies that the mixed economic system such as China might distribute its increased income appropriately, however, the distributional system is hardly operated to improve social welfare index. And thus the distributional system has to be amended to enhance social well-being in China.

Modelling land surface temperature using gamma test coupled wavelet neural network

  • Roshni, Thendiyath;Kumari, Nandini;Renji, Remesan;Drisya, Jayakumar
    • Advances in environmental research
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    • v.6 no.4
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    • pp.265-279
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    • 2017
  • The climate change has made adverse effects on land surface temperature for many regions of the world. Several climatic studies focused on different downscaling techniques for climatological parameters of different regions. For statistical downscaling of any hydrological parameters, conventional Neural Network Models were used in common. However, it seems that in any modeling study, uncertainty is a vital aspect when making any predictions about the performance. In this paper, Gamma Test is performed to determine the data length selection for training to minimize the uncertainty in model development. Another measure to improve the data quality and model development are wavelet transforms. Hence, Gamma Test with Wavelet decomposed Feedforward Neural Network (GT-WNN) model is developed and tested for downscaled land surface temperature of Patna Urban, Bihar. The results of GT-WNN model are compared with GT-FFNN and conventional Feedforward Neural Network (FFNN) model. The effectiveness of the developed models is illustrated by Root Mean Square Error and Coefficient of Correlation. Results showed that GT-WNN outperformed the GT-FFNN and conventional FFNN in downscaling the land surface temperature. The land surface temperature is forecasted for a period of 2015-2044 with GT-WNN model for Patna Urban in Bihar. In addition, the significance of the probable changes in the land surface temperature is also found through Mann-Kendall (M-K) Test for Summer, Winter, Monsoon and Post Monsoon seasons. Results showed an increasing surface temperature trend for summer and winter seasons and no significant trend for monsoon and post monsoon season over the study area for the period between 2015 and 2044. Overall, the M-K test analysis for the annual data shows an increasing trend in the land surface temperature of Patna Urban.

Participation of the Women Covered by Family Physicians in Breast Cancer Screening Program in Kerman, Iran

  • Jafari, Mohammad;Nakhaee, Nouzar;Goudarzi, Reza;Zehtab, Nooshin;Barouni, Mohsen
    • Asian Pacific Journal of Cancer Prevention
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    • v.16 no.11
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    • pp.4555-4561
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    • 2015
  • Background: Mammography screening is a method for reducing breast cancer mortality in women over 40 years old. A participation rate of at least 70% is a prerequisite for screening programs. This study aimed at determining the participation rate of women in breast cancer screening in Iran. Materials and Methods: The study population in this prospective research consisted of 35 to 69 years old women in the villages and towns Kerman District, in 2013. The data were collected by a well-validated risk assessment questionnaire. The questionnaires were completed with the help of health workers and technicians in the health centers, who were trained on breast cancer screening program. Results: As a whole, 19,651 women were invited to complete the questionnaire, of whom 15,794 women (80.37%) completed it. In the urban region, of 3150 eligible women 2728 women (86.60%) participated in the study. The acceptance rates for mammography in rural and urban regions were 34.95% and 8.75%, respectively. Conclusions: Finally, 3.8% and 16.34% of 35 to 69 years old women in the urban regions were mammographed, respectively. Conclusion: The low participation of eligible women in breast cancer screening program alerts us against including the program in the health insurance package.

A Study on the composition factors for making-up Urban image -with special reference to the facade and sign (도시환경 이미지 조성을 위한 구성요소에 관한 연구 -Facade와 Sign(옥외광고물)을 중심으로-)

  • 우영희
    • Archives of design research
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    • v.13 no.2
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    • pp.133-143
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    • 2000
  • Recently there are increasing demands for establishing its peculiar city image in Korea. In establishing a urban image, streetscapes of various functional regions in city have very important roles. And many streetscape were designed and are under design for that purpose. There are many factors involved in the image-generation of streetscape, and the facade is one of the most important factors. In this study, we surveyed many factors in the city-regions of various functions to find out desirable characteristics of facade for each region. And we are going to use there findings as a basic data in the future streetscape design. We selected traditional region(Insadong, Chongro-gu, Seoul), apartment-type residential region (Apkujung-dong, Kangnam-gu, Seoul), and newly developed-downtown (Dunsan-dong, Seo-gu, Daejun) as streetscapes of various functions for facade study. Texture, color, form, size, structure and location of the following facade components were surveyed and analyzed. The surveyed components were window, entrance, equipment, signboard, show window.

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Effect of Difference of Land Cover Conditions on Urban Thermal Environment in Daegu Using Satellite and AWS Data (위성 및 AWS 자료를 이용한 지표면 피복 조건의 차이가 대구의 도시 열환경에 미치는 영향)

  • Ahn, Ji-Suk;Kim, Hae-Dong;Kim, Sang-Woo
    • Journal of Environmental Science International
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    • v.19 no.3
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    • pp.281-293
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    • 2010
  • The present study explores time and spatial thermal environment for Daegu, which is a city built on a basin area, according to varying land cover conditions of the earth's surface by analyzing data derived from meteorological observation and satellite images. The study has classified land use by utilizing MODIS satellite images and analyzed land surface temperature. Also, by using data acquired from automatic weather system, the study has evaluated the effects of atmospheric heating caused by city pavements by analyzing the sensible heat flux between the city's land surface and the atmosphere. The results are as follows. 1) Classification of land use in the Daegu area shows 46.64% of urban and built-up area, 1.39% of watersides, 35.19% of forest, 11.43% of crops, and 5.37% grasslands. 2) During the weekdays throughout the year, the land surface temperature was high for Dalseogu, Bukgu, and Seogu regions where industrial complexes could be found. Comparatively, lower temperature could be observed in the woodlands. 3) While the land surface temperature displayed the effects of pushing air upwards during the weekdays in urban areas, the reverse was true for forest regions. During the night, the temperature did not exert any significant influence on air movement.

The Development of Eco-village Planning Indicators for Sustainability (지속가능성 확보를 위한 생태마을 계획요소 개발)

  • Woo, Hye-Mi;Ban, Yong-Un;Han, Kyung-Min;Baek, Jong-In
    • Journal of Korean Society of Rural Planning
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    • v.18 no.2
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    • pp.1-11
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    • 2012
  • Eco-village has been regarded as an alternative to accomplish sustainable development for rural village. This study has intended to develop comprehensive planning indicators to establish an eco-village based on such aspects of sustainable development as economy, environment, and society. To reach this objective, this study has set up six goals as follows: 1) ecological production activities for agriculture, 2) resource circulation and energy independence in the economic domain; 3) building cultural and historical succession and community activation, and 4) living together with surrounding regions in social domain; and 5) maintaining environmental habitat, and 6) restoring natural ecosystem in environmental domain. Based on these goals, this study has developed the planning indicators to build an eco-village through case study, literature review, survey for suitability, and factor analysis. This study has found 17 strategies and 47 planning indicators in accordance with the six goals.

Study on the Long-term Change of Urban Climate in Daegu (대구의 장기적 도시기후 변동에 관한 연구)

  • 김해동
    • Journal of Environmental Science International
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    • v.12 no.7
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    • pp.697-704
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    • 2003
  • Through data analysis using the meteorological data during 40 years(1961∼2000) for 2 stations(Daegu and Chupungnyong), we studied the present condition and long-term trends in urban climatic environments of Daegu. It was found that there was about 1.5$^{\circ}C$ rise in annual mean temperature of Daegu from 1961 to 2000. On the other hand, that of Chupungnyung was not more than 0.4$^{\circ}C$ for the same period. The regional disparity in temperature changes has been caused by the difference of urban effects on climate between two regions. In particular, the urban warming appears more significant in winter season. There was about 3$^{\circ}C$ rise in annual mean daily minimum temperature of winter season(Dec.∼Feb.) in Daegu. As the result, the number of winter days continuously decreased from 115 days(1961) to 75 days(2000). The long-term trends of relative humidity were also studied to exame the effects of urbanization on climate in Daegu. It was found that there was about 7% decrease in relative humidity of Daegu during past 40 years(1961∼2000). On the other side, the decrease of Chupungnyung was not more than 2% for the same period. The long-term trends of the other climatic factors(fog days, tropical night days, etc) were also studied in this study.

Assessment of Observation Environment for Surface Wind in Urban Areas Using a CFD model (CFD 모델을 이용한 도시지역 지상바람 관측환경 평가)

  • Yang, Ho-Jin;Kim, Jae-Jin
    • Atmosphere
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    • v.25 no.3
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    • pp.449-459
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    • 2015
  • Effects of buildings and topography on observation environment of surface wind in central regions of urban areas are investigated using a computational fluid dynamics (CFD) model. In order to reflect the characteristics of buildings and topography in urban areas, geographic information system (GIS) data are used to construct surface boundary input data. For each observation station, 16 cases with different inflow directions are considered to evaluate effects of buildings and topography on wind speed and direction around the observation station. The results show that flow patterns are very complicated due to the buildings and topography. The simulated wind speed and direction at the location of each observation station are compared with those of inflow. As a whole, wind speed at observation stations decreases due to the drag effect of buildings. The decrease rate of wind speed is strongly related with total volume of buildings which are located in the upwind direction. It is concluded that the CFD model is a very useful tool to evaluate location of observation station suitability. And it is expected to help produce wind observation data that represent local scale excluding the effects of buildings and topography in urban areas.

Comparison of Utilization of Physical Therapy for Elderly Persons in Urban and Rural Areas in Honam

  • Ji, Sung Ha;Kim, Ki Jong;Jun, Hyun Ju;Lee, Young Sin
    • Journal of International Academy of Physical Therapy Research
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    • v.5 no.2
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    • pp.701-707
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    • 2014
  • This study was carried out survey to compare using status of physical therapy for elderly persons between urban and rural area in Honam. There were 16 places consisting of general clinics, departments of family medicine, pain medicine, and orthopedics that run outpatient physical therapy. This study distributed 636 questionnaires in total and collected 400 responses. Regionally, 200 responses out of 311 questionnaires from Gwangju and 200 responses out of 325 questionnaires from Jeollanam-do and Jeollabuk-do were collected. Regionally speaking, Gwangju was 62% while Jeollanam-do and Jeollabuk-do regions were 88%, indicating patients in rural areas employed more public transportation, which was statistically significantly different. There was a difference between urban and rural areas with regard to questions regarding improvement with physical therapy. Factors related to the number of physical therapy visits per week that showed a significant difference between urban and rural areas found by the linear regression analysis result were working hours, whether the patient exercised or not, and pain stress. This result suggest that it is necessary to reduce working hours and pain stress experienced by rural elderlies as well as to encourage regular exercise via national polices.