Abstract:
Packet flow control in a Wireless Local Area Network (WLAN) system includes controlling packet flow of the WLAN using a pause frame depending on whether a buffer of an (Access Point) AP is saturated, thereby preventing packet loss and channel dissipation and improving the efficiency with which resources of the WLAN are utilized.
Abstract:
Disclosed is a surface coating film for a forming machine, including: a substrate; a nitride layer on the substrate; a multilayered film layer deposited on the nitride layer by reaction of nitrogen (N) with a TiAl target and a Cr target; and a carbonitride layer deposited on the multilayered film layer by reaction of nitrogen (N) and carbon (C) with a TiAl target and a Cr target.
Abstract:
This invention relates to a golf lesson apparatus and server by using intrinsic location and user authentication which is installed at each tee box of golf courses or driving ranges. This invention aims simple and easy correction of user's swing posture, and is comprised of: the Wireless Communication Part which authenticates users with the user's RFID ID card; the Motion Detection Part which records user's swing posture; the Data Storage Part which stores the video of the user's swing posture; the Key Input Interface Part which receives user's command; the Display Part which shows the video of the user's swing posture on real time basis and the video of analysis and lesson on user's swing posture transmitted from the golf lesson server; the Network Interface Part which connects the golf lesson server via wired/wireless networks; and the Control Part which provides the services linked with the Golf Lesson Server.
Abstract:
The present invention relates to a vacuum heat treatment apparatus capable of charging or withdrawing an object into or from either a heating chamber or a cooling chamber by a transport means. The vacuum heat treatment apparatus includes: A vacuum heat treatment apparatus, including: a plurality of heating chambers charged with an object and subjected to a heat treatment process; a rail disposed between the plurality of heating chambers; a bogie moving while being disposed on the rail; a cooling chamber disposed on the bogie and cooling the object; and a transport means disposed on the bogie and provided to charge or withdraw the object into or from any one of the plurality of heating chambers and the cooling chamber.