Abstract: This invention relates to Mn—Al magnetic powders of a high coercive force which are obtained from Mn—Al alloy vaporized by plasma arc discharging, and a manufacturing method thereof. The Mn—Al magnetic powders are produced by discharging a plasma arc to a compact which is formed by compacting a blend containing 20-60% by weight of Mn powder and 40-80% by weight of Al powder, collecting nanoscale Mn—Al particles after cooling the vaporized blend, and heat-treating the particles. According to the present invention, the Mn—Al magnetic powders of light weight and enhanced corrosion resistance are produced at a low cost.

Abstract: This invention relates to Mn—Al magnetic powders of a high coercive force which are obtained from Mn—Al alloy vaporized by plasma arc discharging, and a manufacturing method thereof. The Mn—Al magnetic powders are produced by discharging a plasma arc to a compact which is formed by compacting a blend containing 20-60% by weight of Mn powder and 40-80% by weight of Al powder, collecting nanoscale Mn—Al particles after cooling the vaporized blend, and heat-treating the particles. According to the present invention, the Mn—Al magnetic powders of light weight and enhanced corrosion resistance are produced at a low cost.

Abstract: A mobile Internet access point is disclosed that connects a wireless LAN terminal to a mobile Internet. The mobile Internet access point includes: a plurality of mobile Internet access units, a wireless LAN access unit, and a converting unit. The mobile Internet access units communicate with one or more base stations, respectively, and are connected to a mobile Internet. The wireless LAN access unit is connected to one or more wireless LAN terminals that can be connected to a wireless LAN and manages connected wireless LAN terminals. The converting unit converts wireless data, received by the wireless LAN access unit, into mobile Internet data following the protocol of the mobile Internet. The converting unit also converts mobile Internet data, received via the plurality of mobile Internet access units, into wireless LAN data following the protocol of the wireless LAN.

Abstract: A Worldwide Interoperability for Microwave Access (WiMAX) integrated network server is disclosed. The WiMAX integrated network server is integrally includes an Access Service Network Gateway (ASN-GW), an Authentication Authorization Accounting (AAA) connected to the ASN-GW, and a Home Agent (HA). The ASN-GW follows the WiMAX standard, manages a mobile station connected to a base station, and provides connection paths connected to a network. The AAA authenticates the mobile station to be connected to the network. The HA provides a Mobile IP service to guarantee the mobility of the mobile station. The WiMAX integrated network server includes a separate data processing unit, which makes it possible to rapidly process data. The WiMAX integrated network server can independently manage communication among the mobile stations connected thereto, separately from an external network. The WiMAX integrated network server does not require additional equipment, which reduces the installation space and costs.

Abstract: This invention relates to a process for hydrogenating selectively the unsaturated double bonds of copolymer having the double bonds of conjugated diene unit, which has been widely used as a modifier of transparent impact-resistant resin or polyolefin, and polystyrene resin. According to this invention, the copolymer is saturated via hydrogenation in the presence of a novel homogeneous system organotitanium catalyst without a separate reducing agent, thus representing an extremely high hydrogenation yield with remarkable hydrogenation reproducibility. Hence, a compound represented by the following formula I is employed as an appropriate catalyst.Formula I ##STR1## Wherein Cp is a cyclopentadienyl (C.sub.5 H.sub.5) group; R.sub.1, R.sub.2 and R.sub.3 are hydrogen atom or alkyl group of 1 to 3 carbon atoms; andR.sub.1, R.sub.2 and R.sub.3 can be the same or different.