Abstract: The present invention relates to a grass protection mat which can be used in golf courses, grass fields, lawns and the like to protect grass while enduring pressure from being stepped on by people and loads from objects. The grass protection mat comprises: networked main body portions (10) in which hexagons are continuously repeated; a tetragonal border (11) finishing the edge; columns (20) vertically formed at each hexagonal corner of the main body portions; wall support bodies (30) formed on the upper surface of the networked main body portions (10) so as to be lower than the columns; upper protrusions (40) formed on the upper surface of the networked main body portions (10) so as to be higher than the columns; and Y-shaped lower connectors (50) for connecting three columns (20) among six columns forming a hexagon at the lower ends of the columns (20) so as to meet at the center of the hexagon.

Abstract: An intrusion detection system and method of a wireless network providing wireless communication to one or more wireless terminal, and an intrusion detection sensor capable of detecting attacks against wireless network are provided. The intrusion detection system of a wireless network includes: an access point providing wireless communication to a wireless terminal; and an intrusion detection sensor examining packets transmitted and received between the access point and a wireless terminal according to a predetermined detection rule. The access point transmits confirmation information on whether or not an event packet, including critical information on whether or not a wireless line connection between the access point and the wireless terminal is established, is transmitted, to the intrusion detection sensor, and the intrusion detection sensor examines an event packet by using the confirmation information.

Abstract: The wave strength of a remote control key of a vehicle can be enhanced by forming the remote control key including a gripping portion, a metallic blade portion projecting from the gripping portion, and a transmitter contained in the gripping portion and electrically connected to the metallic blade portion.