Sidewalks have become important for modern cities in order to ensure that their inhabitants can move to their different activities in an optimal and safe manner.This research examines the perception of residents of the metropolitan area of Panama on the connectivity and quality of sidewalks.The study of sidewalks has been generally focused on evalu
The development of entrepreneurial interest among young people represents an important alternative in terms of using the potential of young Throw Type people.Youth unemployment represents a significant loss of human capital that could contribute to economic growth.The last challenges that young people faced (mass emigration abroad, general demograp
In this Jumpsuit study, nineteen unmodified lignins from various sources (hardwood, softwood, wheat straw, and corn stover) and isolation processes (kraft, soda, organosolv, sulfite, and enzymatic hydrolysis) were used to replace 30 wt.% of petroleum-based polyol in rigid polyurethane/polyisocyanurate (PUR/PIR) foam formulations.Lignin samples were
An experimental and numerical study has been carried out to investigate the forced convection heat transfer by clean or dusty air in a two dimensional annulus enclosure filled with porous media (glass beads) between two vertical concentric cylinders.The outer cylinder is of (82 mm) outside diameters and the inner cylinder of (27 mm) outside diamete