Abstract: A secured checking cabin for checking people entering closed public regions has an entrance passage between two armored walls defining a gap dimensioned to prevent more than a single person at a time to walk between the walls side by side. At least one armored capturing unit coupled to the entrance passage admits a person coming from the entrance passage, and is in communication with a closed public space. An entrance mechanism allows the entrance of one person at a time to the entrance passage, and a no-return mechanism prevents him from returning therethrough. An exit mechanism releases a person from the capturing unit to the closed public space, and a locking mechanism locks both the entrance and exit mechanisms upon demand. At least one detector is located in the entrance passage or in the capturing unit for detecting a material suggestive of a potential danger.

Abstract: A method for creating an infrastructure especially useful for construction projects requiring large amounts of filler material, comprising: (a) creating blocks made of compressed refuse; (b) reinforcing each block with a flexible sheet (e.g. plastic sheet, or e.g. plastic or metal network) or a plastic or metal band, or a combination thereof, wrapped tightly around said block; (c) arranging said blocks of compressed refuse one above the other, and/or one beside the other within a mold, upon a concrete floor or upon a plurality of spacing element which allow for the flow of molten concrete under said blocks, and spacing said blocks of compressed refuse a predetermined distance from the interior walls of said mold; (d) casting concrete in said mold containing said blocks to a predetermined height above the uppermost surface of said blocks.