• Title/Summary/Keyword: GIS method

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Lifestyle Behaviors and Early Diagnosis Practices of Cancer Patients

  • Yilmaz, Medine;Sanli, Deniz;Ucgun, Mujde;Kaya, Nur Sahin;Tokem, Yasemin
    • Asian Pacific Journal of Cancer Prevention
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    • v.14 no.5
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    • pp.3269-3274
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    • 2013
  • Background: The aim was to determine the lifestyle behaviors and the practices for early diagnosis of cancer of cancer patients. Materials and Methods: A descriptive cross-sectional design was used for this study. The sample consisted of 222 patients with a diagnosis of cancer (non-random sample method). Ethical permission was obtained of the Non-interventional Research Ethics Committee of our Institution. Values of p<0.05 were accepted as statistically significant. Results: It was observed that 54.4% of the patients had never performed breast self-examination, 60.8% had never had a mammography, and 71.2% had never had a Pap smear. Sixty-six point two percent of patients had never had screening for colon cancer within the past ten years. GIS cancers were higher in smokers and ex-smokers (p=0.005), in drinkers and in ex-drinkers (p=0.000). The breast cancer rate was higher in obese people (p=0.019). Conclusions: The results of this study provide information on the healthy lifestyle behavior of cancer patients before their diagnosis, and their use of early diagnosis practices. The important aspect of this study is to extend cancer patients' period of life after the diagnosis and treatment process, to make them conscious of risky lifestyle and nutritional behavior so that they can maintain a high quality of life, and to start initiatives in this direction that would ensure changes in behavior.

Improved Radial Sweep Algorithm for 3-dimensional Terrain Modelling (3차원 지형 모델링을 위한 개선된 Radial Sweep 알고리즘)

  • Ryoo, Seung-Taek;Ahn, Chung-Hyun;Yoon, Kyung-Hyun
    • Journal of Korean Society for Geospatial Information Science
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    • v.5 no.2 s.10
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    • pp.77-85
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    • 1997
  • Researches in the field of Computer Graphics and Geographical Information Systems(GIS) have extensively studied the method of photo-realistic landscape modelling, because it have become a commom requirement in applications such as flight simulators, mission rehearsal, and construction planning. A common approach to the display of terrain uses a Digital Elevation Model(DEM). DEM is an evenly spaced array of the terrain elevation data and can be obtained from stereo satellite data. With the DEM data, the process of 3D terrain modelling consists of three steps. The first step is to extract the meaningful data (such as peak, pit, passes...) from DEM data based on LOD(Level Of Detail) criteria. The second is to construct the 3D surface by TIN, which represents a surface as a set of non-overlapping continuous triangular facets of irregular size and shape. The third is a rendering of 3D terrain model. The goal of this research is a construction of 3D terrain with TIN. To do this, we are going to app]y Radial Sweep Algorithm. Radial Sweep Algorithm for generating TIN works quickly and efficiently. However, it does not solve the problem caused by the approximated nature of triangulated surface. To solve this problem, this research derive improved radial sweep algorithms with the optimal triangle definition.

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Characteristics of Non-point Source Runoff in Housing and Industrial Area during Rainfall (강우시 주택 및 공단지역의 비점오염원 유출특성)

  • Kim, Kang Suk;Park, Jong Seok;Hong, Hyeon Seung;Rhee, Kyoung Hoon
    • Journal of Wetlands Research
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    • v.14 no.4
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    • pp.581-589
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    • 2012
  • Non-point source pollutant is exerting a serious influence on the water quality, since the characteristics of stormwater runoff is varied by the land usage pattern of an area and a basin, and all sorts of pollutants on the earth in rainfall flow into the urban stream. This study estimated EMC of each pollutant to investigate the characteristics of stormwater runoff by separating the urban area as the housing area and industrial area. As a result of the analysis, the first flush effect occurred in the non-point source pollutant of housing area and industrial area, as the runoff concentration gradually reduces after it rapidly increases in the initial rainfall, and in case of the non-point source pollutant the control of first stage rain-water. It is considered to require the continuous follow-up study such as the scale of long-term rainfall event and water quality data, land usage pattern by GIS method, database of topography and geological features, and so forth.

Update for Building Layers of Digital Map Using LiDAR Data and Aerial Images (LiDAR자료와 항공영상을 이용한 수치지형도 건물레이어 갱신)

  • Yoo, Hwan-Hee;Goo, Sin-Hoi;Kim, Seong-Sam
    • Journal of Korean Society for Geospatial Information Science
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    • v.14 no.2 s.36
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    • pp.43-53
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    • 2006
  • As NGIS project has been implemented in 1995 and effectiveness of geospatial information increased, Digital maps serve several purpose in administrative, living, and the variety of industrial fields. But, Digital maps have difficulties in application of managing urban facilities due to many differences with real world information caused by high update cost and long generation period. This paper suggests an update method of building layers of digital map in urban area; first, we verify the filtered building information using digital areal imagery and LiDAR data which is high-accurate and also can be faster and more economical in 3D information acquisition, and finally update building layers by comparing with the existed digital map. Future research will concentrate on automatic removal of the small and the tree regions, discrimination of buildings and vegetation for generating and updating building layers using LiDAR data.

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A Method for Zoning the Parcel-based Protecting Area of the Ecological Network in Forest (지적 기반 산림생태네트워크 보호구역 설정방안)

  • Jang, Rai-Ik;Jang, Gab-Sue;Jung, Ok-Sik;Ra, Jung-Hwa
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.12 no.6
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    • pp.131-142
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    • 2009
  • The purpose of this study is to detect the protection area around the Geum-buk and Geum-nam Mountains for making a sustainable ecological network. The protection area in the Geum-buk and Geum-nam Mountains was analyzed by using spatial data and a field survey for landscape conservation purposes. A survey scope was fixed using digital elevation model, and the protection area was finally determined based on the parcel map called as the Korea Land Information System (KLIS). Here we have several conclusions in this study. First, spatial data used in this study were a map of ecological and natural degree (MEND), forest distribution map, elevation map, slope map, and several maps for the protection area assigned by laws regarding to the natural resources. Second, we used 4 alternatives to determine the best choice for showing the ecological network in the study area. One alternative (alt. 3) of 4 ones was finally chosen as the best condition for making the ecological network. The condition in elevation and slope was a little modified to a lower level in alt, 3. The result derived from alt, 3 reflected the continuity and connectivity in the ecological network and we estimate that the protection area can protect the core area using the buffer zone around the ecological network. Finally the parcel-based protection area in the Geum-buk and Geum-nam Mountains had $493.92km^2$ of the core area, and $233.99km^2$ of the buffer zone, which means the parcel-based protection area increased by $97.76km^2$ in the core area, but decreased by $76.61km^2$ as of in the topographical map.

Land Use Feature Extraction and Sprawl Development Prediction from Quickbird Satellite Imagery Using Dempster-Shafer and Land Transformation Model

  • Saharkhiz, Maryam Adel;Pradhan, Biswajeet;Rizeei, Hossein Mojaddadi;Jung, Hyung-Sup
    • Korean Journal of Remote Sensing
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    • v.36 no.1
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    • pp.15-27
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    • 2020
  • Accurate knowledge of land use/land cover (LULC) features and their relative changes over upon the time are essential for sustainable urban management. Urban sprawl growth has been always also a worldwide concern that needs to carefully monitor particularly in a developing country where unplanned building constriction has been expanding at a high rate. Recently, remotely sensed imageries with a very high spatial/spectral resolution and state of the art machine learning approaches sent the urban classification and growth monitoring to a higher level. In this research, we classified the Quickbird satellite imagery by object-based image analysis of Dempster-Shafer (OBIA-DS) for the years of 2002 and 2015 at Karbala-Iraq. The real LULC changes including, residential sprawl expansion, amongst these years, were identified via change detection procedure. In accordance with extracted features of LULC and detected trend of urban pattern, the future LULC dynamic was simulated by using land transformation model (LTM) in geospatial information system (GIS) platform. Both classification and prediction stages were successfully validated using ground control points (GCPs) through accuracy assessment metric of Kappa coefficient that indicated 0.87 and 0.91 for 2002 and 2015 classification as well as 0.79 for prediction part. Detail results revealed a substantial growth in building over fifteen years that mostly replaced by agriculture and orchard field. The prediction scenario of LULC sprawl development for 2030 revealed a substantial decline in green and agriculture land as well as an extensive increment in build-up area especially at the countryside of the city without following the residential pattern standard. The proposed method helps urban decision-makers to identify the detail temporal-spatial growth pattern of highly populated cities like Karbala. Additionally, the results of this study can be considered as a probable future map in order to design enough future social services and amenities for the local inhabitants.

An Improvement of Bottom Up Approach for Estimating the Mobile Emission Level (도로이동오염원 배출량 산정을 위한 Bottom-Up Approach 기법의 개선에 관한 연구)

  • Choe, Gi-Ju;Lee, Gyu-Jin;An, Seong-Chae
    • Journal of Korean Society of Transportation
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    • v.27 no.4
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    • pp.183-193
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    • 2009
  • Air pollution due to vehicle exhaust gas is considered to be a main contributor to the issues of transportation & environment. Furthermore it is raising concern over life quality and public health and is also perceived as a global issue. This research aims at providing helping hands for both central and local governments to set up and promote efficient atmospheric quality improvement policies, with the help of the travel demand forecasting model and GIS. More specifically, it tries to produce the overall emission level with time and space-based high resolution framework. This research, based on bottom-up approach reflecting vehicular traffic characteristics, suggested an improved approach to estimating emission level, by using a traffic model with a total of vehicular mileage revised by surveyed value and atmosphere model. Summing up, using the method proposed, the improvement of the reliability of the emissions inventory from the mobile pollutions sources is expected by the proposed integrated paradigm of transportation and atmosphere modeling approach as a new alternative.

A Study on the Application of the Digital Landuse Map for Land Use State Analysis (국토이용 현황 분석을 위한 토지이용현황도 활용 방안 연구 - 전북지역 대상 -)

  • Woo, Je-Yoon;Koo, Jee-Hee;Lee, Jung-Hun;Hong, Chang-Hee
    • Journal of Korea Spatial Information System Society
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    • v.3 no.2 s.6
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    • pp.63-70
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    • 2001
  • In this study, land use state analysis for northern part of Cheon-ra province where is relatively vast area is accomplished using the application system of land use map. The system is developed for promoting application of the latest land use map and is possible to GIS spatial analysis. Through this study, an analysis method of land use state and decision making support for effective land use plan is presented. It is expected for land use map to be variously applied to land planning by analysis of wide-range land use state and base data for fields such as environment effect, disaster analysis.

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The Bicycle Road Route Selection which Considers the Slope Standard of the Bicycle Road (자전거도로의 경사기준을 고려한 자전거도로 노선 선정)

  • Baik, Seung-Heon;Han, Dong-Yeob;Jin, Hong-Seong
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.29 no.6
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    • pp.553-559
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    • 2011
  • The bicycle use activation plan reduces a greenhouse gas exhaust, and economic convenience, movement timely shortening, health effect will be able to expect but the bicycle user is few. The nationwide bicycle road projects is advanced by the countermeasure for a bicycle use activation. It is advanced a bicycle road basic plan even from each local government. The research against a route selection is advanced actively. But the research against a data process is not coming out the accurate research method. It follows a financial one bicycle road design standard from ministry of land, Transport and maritime affairs. But vertical grade in bicycle road design standard is exception becoming that about unavoidable case with geomorphic environments. From the research which it sees the existing bicycle road consider should have to make the terrain situation of yeosu, slope standard connection about under considering it presented the bicycle road route selection which is possible. It included a lane and road width with additional element and establishment in the bicycle road was produced suitable bicycle road route. The area where the mountain district is many when selecting bicycle road, will be used with application plan of slope standard.

Long-term runoff characteristics on HRU variations of PRMS (PRMS의 HRU크기에 따른 장기유출특성)

  • Kim, Nam-Won;Kim, Hyeon-Jun;Park, Sun-Ho
    • Journal of Korea Water Resources Association
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    • v.38 no.2
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    • pp.167-177
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    • 2005
  • In this study, the PRMS(Precipitation and Runoff Modeling System), developed by USGS(United States Geological Survey), was applied to the Yongdam dam watershed in the Geum River basin. The efficiency for runoff simulation and spatial characteristics of PRMS were evaluated. The runoff changes with the changes of subcatchments and HRUs were estimated. As results, the size of the subcatchment and HRV did not significantly affect the runoff at the exit of watershed. Consequently, the spatial characteristic of PRMS was shown as lumped type rather than semi-distributed. The geographical input data for Yongdam dam watershed were converted to the USGS Input type, and the parameters were calibrated using Rosenbrock optimization method, validated with the observed runoff data. The PRMS showed resonable agreements in the long-term continuous runoff simulation, if the accuracy of observed data is ensured.