Abstract: Provided are a polyimide precursor comprising a reactive end group of Formula Q, a polyimide composition comprising the same and having improved tensile strength and elongation, and a pattern or film or a semiconductor or display device or an electronic device prepared using the same.

Abstract: Provided is a photosensitive resin composition using a polyimide precursor and a benzoxazol precursor copolymer resin that does not contain fluorine, which exhibits a degree of pattern implementation similar to those of existing fluorine-based photosensitive compositions and has the effect of leaving less residues after development.

Abstract: The present disclosure relates to a polymer and a positive photosensitive composition which have increased mechanical properties, a cured film, a protective film, an insulating film, and a semiconductor device which are manufactured therefrom; and a method of synthesizing a polymer and a method for producing a positive photosensitive composition, for providing a display device.

Abstract: A technology is provided capable of improving the efficiency of an OFDM system by obtaining the performance in Bit Error Rate (BER) in a wireless communication using OFDM and determining the minimum FFT input bit that produces a SNR difference of 0.1 dB or below with respect to a theoretical BER graph at a desired performance.

Abstract: An apparatus and method for managing variable MBS zones in an MBS server are provided. The method variably sets an MBS zone based on a characteristic where user movement between MBS zones and content preference are changed depending on time and environment, and thereby enables a safer and faster shift of an MBS zone, thus effectively providing high-quality multimedia service in a mobile environment.

Abstract: Provided is an object migration system for web-based content service migration according to the present invention including: two or more web-based terminals configured to deliver a request for web-based content service migration including object information and service web-based content through a received virtualization object and a web page; a virtualization server configured to allocate a new virtual machine on the basis of the object information received from one of the two or more web-based terminals and deliver a virtualization object generated from content corresponding to the received object information to another of the two or more web-based terminals, the another being a destination terminal corresponding to the received object information; and a web server configured to provide the web page to the two or more web-based terminals. The destination terminal services the same web-based content as serviced by the one web-based terminal, at the same time point.

Abstract: An apparatus and method for managing variable MBS zones in an MBS server are provided. The method variably sets an MBS zone based on a characteristic where user movement between MBS zones and content preference are changed depending on time and environment, and thereby enables a safer and faster shift of an MBS zone, thus effectively providing high-quality multimedia service in a mobile environment.

Abstract: A technology of setting up a MBS zone for providing a mobile IPTV service is provided in which the MBS zone is effectively managed, so that QoS is prevented from being degraded due to the handover delay that is caused by a MBS handover occurring when a user moves between MBS zones.

Abstract: There are provided a wireless communication system for providing diversity gains for multicast services and a method of providing a multicast service. According to the wireless communication system, by transmitting, when terminals are partially distributed in each cell, data to areas where no user exists so as to reduce interference between other MBS (Multicast Broadcast System) zones and other cells that transmit only unicast services, performance deterioration may be minimized.

Abstract: A technology of setting up a MBS zone for providing a mobile IPTV service is provided in which the MBS zone is effectively managed, so that QoS is prevented from being degraded due to the handover delay that is caused by a MBS handover occurring when a user moves between MBS zones.

Abstract: A technology is provided capable of improving the efficiency of an OFDM system by obtaining the performance in Bit Error Rate (BER) in a wireless communication using OFDM and determining the minimum FFT input bit that produces a SNR difference of 0.1 dB or below with respect to a theoretical BER graph at a desired performance.