نتایج جستجو برای: green spaces
تعداد نتایج: 267029 فیلتر نتایج به سال:
Douglas D. MOONEY, Thomas A. RICHMOND Western Kentucky University Bowling Green, KY 42101 USA The ideas of quotient maps, quotient spaces, and upper semicontinuous decompositions are extended to the setting of ordered topological spaces. These tools are used to investigate the semilattice of ordered compactifications and to construct ordered compactifications with o-totally disconnected and o-z...
the criteria and standards of green space development should be specified before any planning for green space development. the cities' conditions not only rule the creation of vast and more importantly planned and organized green spaces but also demand vast green space in order to establish ecological balance against made environments. this research tries to study green space per capita in...
Abstract Globally, extreme weather events are occurring more often, with increased intensity due to anthropogenic climate change. For example, in July 2022, monthly average temperature Spain was 2.7 C above average, and UK has recorded temperatures 40 degrees for the first time. It been proven that implementation of green spaces cities helps address environmental, social, even economic problems...
In this paper we investigate a kind of boundary value problem involving a fractional differential equation. We study the existence of positive solutions of the problem that fractional derivative is the Reimann-Liouville fractional derivative. At first the green function is computed then it is proved that the green function is positive. We present necessary and sufficient conditions for existen...
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