the main purpose of this paper is to study urban management performance in public green spaces (parks) based on economical indexes, social indexes and environmental indexes. for this purposes, we use topsis method that is one of the methods of multiple criteria decision making. the data was obtained through interview and also a questionnaire which was distributed among about 1000 families of ma...

Abstract Eu:CaAl 2 O 4 , Eu:SrAl and Eu:BaAl crystals with various dopant concentration were synthesized by the optical floating zone method, photoluminescence, scintillation, afterglow properties investigated. Under X-ray irradiation, exhibit a broad emission band at 440, 520, 500 nm due to 5d-4f transitions of Eu 2+ respectively. The decay time constants are consistent typical values . Photol...

An attempt to synthesize a holmium sulfidotungstate using potassium polysulfides as reactive flux resulted in orange single crystals of K2[WS4], isotypic K2[MoS4] (orthorhombic; Pnma; a=935.10(3), b=694.22(2), c=1221.85(4) pm; Z=4). A similar obtain neodymium with sodium polysulfide yielded violet substance, which underwent hydrolysis yielding orange-yellow Na2[WS4] ⋅ 4 H2O (monoclinic, C2/c, a...

the split-block experimental design with three replications was used to study the effect of subsoiling in different distances from drain axison soil salinity,and wheat yield. the measurements included soil cone index, soil bulkdensity, infiltration rate and electrical conductivity of saturated extract. each treatment was composed of two factors. the main factors consisted of 3 different distanc...