Application of mathematical models in the spatial analysis of early tree seedling distribution patterns within a treefall gap at Gwangneung Experimental Forest, Korea

2013 ◽  
Vol 56 (5) ◽  
pp. 283-289 ◽  
Author(s):  
Woongsoon Jang ◽  
Christopher R. Keyes ◽  
Jong-Hwan Lim
Keyword(s):  
Spatial Analysis ◽  
Mathematical Models ◽  
Distribution Patterns ◽  
Tree Seedling ◽  
Seedling Distribution ◽  
Treefall Gap

Spatial analysis on distribution patterns of poverty incidences in Peninsular Malaysia

2019 ◽  
Author(s):  
Syerrina Zakaria ◽  
Nuzlinda Abdul Rahman ◽  
Nuredayu Zaini
Keyword(s):  
Spatial Analysis ◽  
Distribution Patterns ◽  
Peninsular Malaysia

scholarly journals Spatial Distribution of Leptospirosis and Land Use in Bantul District, 2010-2018

2020 ◽  
Vol 4 (1) ◽  
pp. 31
Author(s):  
Nur Lathifah Syakbanah
Keyword(s):  
Land Use ◽  
Spatial Distribution ◽  
Spatial Analysis ◽  
Environmental Changes ◽  
Distribution Patterns ◽  
Effective Control ◽  
Residential Areas ◽  
Populations At Risk ◽  
Surveillance Programs ◽  
The Government

Land use is an important environmental factor in the dynamics of human health. In the case of leptospirosis, environmental transmission cycles are caused by rat transition, environmental changes and populations at risk. Utilization of GIS-based spatial analysis may help detecting distribution patterns of leptospirosis cases, allocating resources and planning effective control and surveillance programs in endemic areas. This study aims to analyze the spatial distribution of leptospirosis based on land use and stream flow in Bantul District, 2010-2018. This ecological study was conducted in Bantul District, Yogyakarta for 9 years. Spatial analysis overlays processed data on leptospirosis cases per village and land use maps of 2016 using QGIS 3.0. Spatial distribution of 12 of high leptospirosis villages (18-35 cases) are in residential areas, tributaries, croplands, irrigated fields, rain-fed rice fields, and plantations. Those villages was crossed by major river basin which is potentially as transmission media of leptospirosis cases after heavy rainfall. It is suggested to increase the Early Awareness and Alert (EAA) system by active surveillance of early case finding from the government and endemic villagers.

scholarly journals Use of ovitraps for the seasonal and spatial monitoring of Aedes spp. in an area endemic for arboviruses in Northeast Brazil

2020 ◽  
Vol 14 (04) ◽  
pp. 387-393
Author(s):  
João Victor Oliveira Noleto ◽  
Hevilem Letícia Moura do Nascimento Moraes ◽  
Tamires De Moura Lima ◽  
João Gustavo Mendes Rodrigues ◽  
Diogo Tavares Cardoso ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Spatial Analysis ◽  
High Risk ◽  
Mathematical Models ◽  
Low Cost ◽  
Abiotic Factors ◽  
Northeast Brazil ◽  
Egg Distribution ◽  
Egg Density ◽  
Set Up

Introduction: Due to recent outbreaks of Dengue and Chikungunya and an absence of effective monitoring of the mosquito Aedes spp. in the municipality of São Raimundo das Mangabeiras, State of Maranhão, we aimed to demonstrate the potential of ovitraps used together with mathematical models and geotechnology to improve control of this mosquito. Methodology: From January to December of 2017, ovitraps were set up in five different neighborhoods (Centro, Vila Cardoso, Nazaré, São José e São Francisco). Positivity indices were calculated for each ovitraps, besides the egg density and average number of eggs. Some of the eggs were used for species identification. Mathematical models of correlation and logistic regression were used to evaluate the influence of abiotic factors on egg distribution during each month. Spatial analysis was carried out using georeferencing. Results: A total of 4,453 eggs were counted, with A. aegypti and A. albopictus present in each month and neighborhood. The mathematical models show that rainfall can result in a significant increase in the number of eggs. Entomological calculation indicates that there is a high risk of dissemination of arboviruses in the area. Spatially, it was possible to indicate sites with the largest number of collected eggs, which may facilitate future interventions. Conclusions: As such, ovitraps have proven to be an effective and low cost method for the monitoring of Aedes spp., and that its use may help in arboviruses prevention campaigns.

scholarly journals Comparing tree seedling composition and distribution patterns under different sampling intensities in the 24 ha Gutianshan forest dynamics plot

2016 ◽  
Vol 24 (10) ◽  
pp. 1093-1104
Author(s):  
Yin Guo ◽  
◽  
Yunquan Wang ◽  
Lei Chen ◽  
Xiangcheng Mi ◽  
...  
Keyword(s):  
Forest Dynamics ◽  
Distribution Patterns ◽  
Tree Seedling ◽  
Forest Dynamics Plot

scholarly journals SPATIAL ANALYSIS OF EROSIVE PROCESSES IN PLATEAUS AND DEPRESSIONS OF THE UPPER PARAGUAI RIVER BASIN

GEOGRAFIA ◽  
2018 ◽  
Vol 42 (3) ◽  
pp. 145-157
Author(s):  
Daniel Dias de ANDRADE ◽  
João dos Santos Vila da SILVA ◽  
Vera Aparecida FIGUEIREDO ◽  
Elisa Calhau de CASTRO
Keyword(s):  
Statistical Analysis ◽  
Spatial Analysis ◽  
River Basin ◽  
Spatial Dependence ◽  
Distribution Patterns ◽  
Drainage Basins ◽  
Entire Area ◽  
Mato Grosso ◽  
Natural Characteristics ◽  
Frequency Diagram

Natural characteristics may contribute to the erosion of the soil and to environmental imbalances, and in most cases, they initiate the imbalances that will be exacerbated by human activities. The presence of asymmetry in a frequency diagram is a valuable fact, and may indicate irregularity in the occurrence of events or aggregation of events in preferred locations. Thus, this work aims to demonstrate the use of Geographic Information Systems (GIS) of statistical analysis based on patterns of frequency, density, distribution and spatial dependence of sample points through a cutout of the mapping of the geotechnical aspects conducted for the State of Mato Grosso, generated for the entire area of plateaus and depressions of the Upper Paraguai river basin and its internal units of drainage basins. In most cutouts used in the analysis, the values indicated that is void the possibility that the distribution patterns of erosive events were resulted of chance. The aggregate pattern shown may tend to attract new points, facilitating the transmission of the sample.s qualities through these, favored by your proximity and by the characteristics of the occurrence area

scholarly journals Spatial Analysis of Distribution Patterns of Healthcare Facilities in Osun State, Nigeria

2017 ◽  
Vol 5 (7) ◽  
pp. 331-344 ◽  
Author(s):  
Fadahunsi, J. T. ◽  
Kufoniyi, O. ◽  
Babatimehin, O. I.
Keyword(s):  
Spatial Analysis ◽  
Distribution Patterns ◽  
Healthcare Facilities

scholarly journals Spatial Imbalance Between Tourist Supply and Demand: The Identification of Spatial Clusters in Extremadura, Spain

2020 ◽  
Vol 12 (4) ◽  
pp. 1651 ◽  
Author(s):  
María Cristina Rodríguez Rangel ◽  
Marcelino Sánchez Rivero
Keyword(s):  
Information Systems ◽  
Spatial Analysis ◽  
Geographic Information Systems ◽  
Supply And Demand ◽  
Spatial Association ◽  
Distribution Patterns ◽  
Spatial Clusters ◽  
Sustainable Tourism Development ◽  
Tourism Sector ◽  
Global Moran’S I

The techniques provided by spatial analysis have become a great ally of tourist planning as they allow the carrying out of exhaustive territorial analyses. The greater availability of georeferenced databases together with the more and more extensive use of GIS (Geographic Information Systems) is materialising in the proliferation of studies analysing the distribution patterns of tourist territories. The present study uses these techniques to study the degree of equilibrium in the distribution of places and its level of occupation in a region where the use of expansionary policies of growth of the tourism sector has been able to cause a strong imbalance in said activity, i.e., the case of the region of Extremadura. To verify this, both global contrasts, global Moran’s I and G (d) of Getis and Ord, are used, as well as local contrasts, to map LISA (Local Indicators of Spatial Association). The results obtained confirm the existence of strong imbalances in the effectiveness of the places created while allowing the identification of different clusters of high and low values. These findings represent an important output for the strategic planning of the territory in order to develop a strategy that allows the sustainable tourism development of the territory.

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