Abstract: A management system according to the present invention may comprise: a body including an opening/closing door; a first terminal that is located inside the body, measures environment information inside the body, and generates first data on the basis of the measured environment information; a second terminal that is located outside the body, generates second data including state information of the opening/closing door, and generates third data on the basis of the first data and the second data; and a server that generates a signal including risk coefficient information indicating a contamination level inside the body on the basis of the third data, and transmits the signal to a user terminal.

Abstract: Artificial leather with optimal elongation and a method for manufacturing the same is disclosed, the artificial leather comprising a non-woven fabric with micro-fibers and a polymeric elastomer impregnated into the non-woven-fiber, wherein the polymeric elastomer is 20 to 30% by weight with respect to a total weight of the artificial leather, and a density of the non-woven fabric is within the range of 0.160 to 0.250 g/cm3, wherein the artificial leather can be easily used for the goods with lots of flexed regions, for example, the headliner of vehicle.

Abstract: Artificial leather with optimal elongation and a method for manufacturing the same is disclosed, the artificial leather comprising a non-woven fabric with micro-fibers and a polymeric elastomer impregnated into the non-woven-fiber, wherein the polymeric elastomer is 20 to 30% by weight with respect to a total weight of the artificial leather, and a density of the non-woven fabric is within the range of 0.160 to 0.250g/cm3, wherein the artificial leather can be easily used for the goods with lots of flexed regions, for example, the headliner of vehicle.