Abstract This article proposed an innovative composite sandwich structure reinforced with trapezoidal latticed webs angles of 45°, 60° and 75°. Four specimens were conducted according to quasi-static compression methods investigate the compressive behavior novel structures. The experimental results indicated that specimen 45° showed most excellent energy absorption ability, which was about 2.5 ...

canister desorption is a widely used technique to measure the gas content of coal. the gas content data, when normalized to volume/weight and multiplied by coal seam mass, is used to estimate the gas in place in an area around the cored hole. however, the gas content and the percentage of each constituent are likely to be influenced by trapped air in the canister at the time of the coal enclosu...

seven caspian miniature horses, aged above two years, were used for this study. the skeleton of these horses were cleaned and prepared using appropriate techniques. the vertebral column was studied and photographed. the vertebral column in one of these horses showed variations in thoracic, lumbar and sacral region. the vertebral formola was c7, t19,l5,s6 and a pair of 19th rib was fused with th...

investigations were carried out on coal tailings by conventional cell and column flotation techniques. tests were conducted to assess processing coal tailings of alborz markazi coal washing plant in iran by column flotation. the effects of reagent type/dosage were investigated with conventional flotation and their results were used in the performance of column flotation. also the effects of the...

With changes in the city environment and advances engineering technologies, there is an increasing demand for construction of super-large span domes that can cover a large area to create small internal within specific region. However, structural design must overcome various challenges order break current limitations. Moreover, little research on structures achieving such spans. The seismic perf...