Abstract: A mobile terminal and a method for controlling charging thereof are disclosed. The mobile terminal sets a partial region of a transparent display unit to an opaque region and the other region to a transparent region if a charging command signal is received, and performs information display operation on the opaque region and solar light transmittive operation for charging using the solar battery on the transparent region.

Abstract: Disclosed is a method for estimating an available bandwidth of a network link by transmitting small-sized probing packets using a time stamp function of an Internet control message protocol (ICMP) and using time information of the probing packet returned. According to the invention, even when the separate program or function is not activated in the router, it is possible to easily estimate and monitor the available bandwidth of the exterior network link connected to the network being managed. Accordingly, it is possible to operate the network more stably and to detect the abnormal sign of the network at early stage, thereby quickly coping with it. In addition, it is possible to prevent the excessive traffic or load from being caused in the network.

Abstract: Disclosed is a system integration method based on a system entity structure (SES). The method comprises steps of (a) analyzing an integration target system to extract a technology attribute and to represent the integration target system as a system entity structure (SES); and (b) carrying out a pruning operation for constitution elements of the integration target system represented as the system entity structure (SES) in the step (a), in consideration of the technology attribute extracted in the step (a), an environmental factor and a pruning rule, which being a basis for selection of constitutional technological elements. The invention is particularly effective for an integration target system having various element technologies such as information security system.

Abstract: Disclosed is a helical antenna manufacturing apparatus and method. A controller controls a core driver and a roller driver to rotate a core and a roller according to an rpm which is pre-set according to diameters of the core and the roller, and controls the core driver to move the core in a longitudinal direction according to the moving speed which is set according to working frequency bands of the antenna. When the core and the roller are contacted, they are rotated in opposite directions, and as the roller is rotated, a paste in a paste box moves together with a surface of the core and is printed on the surface of the core. As the core is rotated and moved in the longitudinal direction, a helical line is formed on the core. Pitches of the helical line formed on the core is changed according to the moving speed of the core in the longitudinal direction, and the working frequency bands of the antenna are changed according to the pitches of the helical line.