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Full-Text Articles in Physical Sciences and Mathematics
Kernel Density Estimation Of Traffic Accidents In A Network Space, Zhixiao Xie, Jun Yan
Kernel Density Estimation Of Traffic Accidents In A Network Space, Zhixiao Xie, Jun Yan
Dr Jun Yan
A standard planar Kernel Density Estimation (KDE) aims to produce a smooth density surface of spatial point events over a 2-D geographic space. However, the planar KDE may not be suited for characterizing certain point events, such as traffic accidents, which usually occur inside a 1-D linear space, the roadway network. This paper presents a novel network KDE approach to estimating the density of such spatial point events. One key feature of the new approach is that the network space is represented with basic linear units of equal network length, termed lixel (linear pixel), and related network topology. The use …
Geography Of Waste As A New Approach In Waste Management Study,, Florin C. Mihai
Geography Of Waste As A New Approach In Waste Management Study,, Florin C. Mihai
Florin C MIHAI
Municipal waste management in the last two decades has become a global environmental priority in the context of increasing amounts of waste generated due to the development of a mass consumer society. Various issues of waste management , territorial and temporal variability, spatial analysis of treatment or disposal facilities, systemic implications on the environment, the harmonization of international policy at national, regional and local level are solid arguments for studying this field by geography. Mostly technical or economic studies, lacking a vision of territory are supplemented in the conceptual and methodological level by geographers. This paper performed on the one …
The Usage Of Natural Fertilizers - A Practice That Favors The Ecological Agriculture Development In Romania, Andreea Ghiurcă, Andreea Lămășanu, Florin C. Mihai
The Usage Of Natural Fertilizers - A Practice That Favors The Ecological Agriculture Development In Romania, Andreea Ghiurcă, Andreea Lămășanu, Florin C. Mihai
Florin C MIHAI
Natural fertilizers were used in agriculture since ancient times and are still the best method of soil fertilization. Traditional agriculture, practiced in rural areas of Romania, contributes to the maintenance of soils fertilization ecological practices. Our research shows the evolution of the quantity of natural fertilizers used in the past 20 years at the national level and at the level of NeamŃ County captures the evolution over the seven years of natural fertilizers areas. In the analyzed period, the quantity of natural fertilizers on agricultural land is growing, but fertilized land record low values, showing that it has increased the …
Geomorphic Determinants Of Species Composition Of Alpine Tundra, Glacier National Park, U.S.A., George P. Malanson
Geomorphic Determinants Of Species Composition Of Alpine Tundra, Glacier National Park, U.S.A., George P. Malanson
George P Malanson
Because the distribution of alpine tundra is associated with spatially limited cold climates, global warming may threaten its local extent or existence. This notion has been challenged, however, based on observations of the diversity of alpine tundra in small areas primarily due to topographic variation. The importance of diversity in temperature or moisture conditions caused by topographic variation is an open question, and we extend this to geomorphology more generally. The extent to which geomorphic variation per se, based on relatively easily assessed indicators, can account for the variation in alpine tundra community composition is analyzed versus the inclusion of …