Abstract: The present invention relates to a composition for treating inflammatory diseases comprising germanium telluride nanosheets coated with polyvinylpyrrolidone, and the nanosheets have excellent anti-inflammatory and thus are excellent in treating inflammatory bowel disease and psoriasis.

Abstract: A self-healing alloy contains 5 to 11% by weight of molybdenum (Mo), iron (Fe) as a remainder, and unavoidable impurities. A method for manufacturing the self-healing alloy includes heat treating the alloy or preparing an alloy raw material powder and sintering, homogenizing, and cooling the alloy raw material powder.

Abstract: The present invention relates to a polymer blend composition comprising a dielectric elastomer, an actuator film manufactured using the same, and an actuator comprising the film. The polymer blend composition according to the present invention comprises a block copolymer having excellent compatibility with the dielectric elastomer and excellent dielectric properties, and thus displacement values suitable for the purpose can be obtained by a simple method of adjusting a composition of the polymer blend. Moreover, the film manufactured using the same has high dielectric constant, low dielectric loss and high electromechanical displacement, and thus the film exhibits excellent dielectric properties when it is applied in a dielectric layer for an actuator.

Abstract: The present invention relates to block copolymer electrolyte composite membranes with improved ionic conductivity. The block copolymer electrolyte composite membrane in accordance with an aspect of the present invention can comprise a plate-like inorganic filler as surface-modified with a sulfonic group; and a block copolymer comprising at least one selected from the group consisting of a sulfonic group, a carbonic acid group, and a phosphoric acid group.

Abstract: The present invention relates to one of energy conversion devices, actuator and a dielectric layer used in the actuator. The present invention provides a polymer blend composition capable of easily controlling the ability of converting electrical energy to mechanical energy, which is prepared by blending a piezoelectric polymer with a flexible elastomeric block copolymer showing an effective miscibility therewith, and a tunable actuator using the same.

Abstract: Disclosed is a heat treatment method for a cylinder block of an internal combustion engine. More specifically, the method includes heating the cylinder block to a solution heat treatment temperature, processing the cylinder block at the solution heat treatment temperature between 440° C. to 460° C. for one to two hours, quenching the cylinder block and then immediately aging the cylinder block for a predetermined amount of time.

Abstract: The present invention relates to an actuator which is one of the energy conversion devices, and is characterized by improving the ability to convert electrical energy into mechanical energy by way of using a dielectric elastomer composite comprising a filler with an efficient dispersibility. In case of using a conventional resilient dielectric layer, there was a problem in that the operating voltage is high, while advantageously exhibiting a fast response and a high strain.

Abstract: The present invention relates to transparent antistatic films using graphene, and methods for preparing the same. The films include conductive particles comprising a single-layer or multi-layer graphene, and a binder. The films are prepared by dispersing graphene in a solvent to obtain a graphene dispersion; dissolving a curable binder to a solvent to obtain a binder solution; mixing the graphene dispersion, the binder solution and optionally an additive to obtain a coating solution; applying the coating solution onto a substrate and drying the solution to form a coated film; and curing the coated film. According to the present invention, transparent or semitransparent antistatic films having excellent permeability, abrasion resistance, scratch resistance, chemical stability and dimensional stability can be prepared. The films also have superior adhesion to substrates and applicability, and thus may be advantageously applied to rigid or flexible substrates.

Abstract: The present invention relates to a polymer blend composition comprising a dielectric elastomer, an actuator film manufactured using the same, and an actuator comprising the film. The polymer blend composition according to the present invention comprises a block copolymer having excellent compatibility with the dielectric elastomer and excellent dielectric properties, and thus displacement values suitable for the purpose can be obtained by a simple method of adjusting a composition of the polymer blend. Moreover, the film manufactured using the same has high dielectric constant, low dielectric loss and high electromechanical displacement, and thus the film exhibits excellent dielectric properties when it is applied in a dielectric layer for an actuator.

Abstract: The present invention relates to block copolymer electrolyte composite membranes with improved ionic conductivity. The block copolymer electrolyte composite membrane in accordance with an aspect of the present invention can comprise a plate-like inorganic filler as surface-modified with a sulfonic group; and a block copolymer comprising at least one selected from the group consisting of a sulfonic group, a carbonic acid group, and a phosphoric acid group.

Abstract: The present invention relates to one of energy conversion devices, actuator and a dielectric layer used in the actuator. The present invention provides a polymer blend composition capable of easily controlling the ability of converting electrical energy to mechanical energy, which is prepared by blending a piezoelectric polymer with a flexible elastomeric block copolymer showing an effective miscibility therewith, and a tunable actuator using the same.

Abstract: An antenna apparatus for a mobile communications terminal and its operation method in which the length of an antenna can be varied according to the changes in the usage environment. The antenna requires minimal space for installation, and can support multiplexing of frequency bands, such as tri-band or quad-band capabilities, so as to reduce the deterioration of signal transmission and reception sensitivity caused by changes in the usage environment, such as effects from the user's hand that holds the terminal, an act of opening and closing of a folder portion of the terminal, and the like.

Abstract: A system for preventing signal quality degradation in a CDMA system includes a phase locking unit for controlling a phase of an oscillating frequency signal by controlling a voltage control oscillation unit, a mixer for mixing a frequency oscillation signal and a radio frequency signal received through an antenna, a demodulator for demodulating a signal output from the mixer, a signal detection unit for detecting a signal demodulated by the demodulator, a comparison unit for calculating a constellation and an error vector of the signal detected by the signal detection unit and comparing the constellation and error vector to a setup reference signal, and a controller means for controlling the phase locking unit, mixer and demodulator selectively in accordance with a comparison result of the comparison unit so as to make the constellation and error vector of the signal coincide with the reference signal.

Abstract: A case for a communication terminal and a communication terminal using the case are provided. The case includes a coupling unit configured to electrically couple the communication terminal and the case, and an extension device formed in the case and configured to extend a communication performance of the communication terminal when the communication terminal and the case are coupled together via the coupling unit.

Abstract: An apparatus for increasing channel capacity in a mobile communication system using a hybrid phase shift keying (HPSK) modulation method. The method includes a walsh code control unit for checking sequences of walsh codes respectively outputted from a first walsh code unit and a second walsh code unit, a walsh rotator for generating a plurality of repeated complex functions and outputting them and a rotator control unit for selecting the repeated complex functions outputted from the walsh rotator according to the sequence of the walsh codes outputted from the first walsh code unit and the second walsh code unit. The method can use all walsh codes and increase reverse channel capacity.

Abstract: A receiving apparatus of a high speed digital data communication system includes: a mobile station modem (MSM) for judging a modulation method according to a data rate of a received signal and a position of a data pointer; a controller for controlling a control signal with respect to a position change of the data pointer on the basis of the information collected by the MSM; and a demodulator for determining a position of the data pointer according to the control signal outputted from the controller and demodulating a signal. By varying a position interval of data pointers according to a data rate, an error probability due to a noise can be reduced and a speech quality can be improved.

Abstract: A receiving apparatus of a high speed digital data communication system includes: a mobile station modem (MSM) for judging a modulation method according to a data rate of a received signal and a position of a data pointer; a controller for controlling a control signal with respect to a position change of the data pointer on the basis of the information collected by the MSM; and a demodulator for determining a position of the data pointer according to the control signal outputted from the controller and demodulating a signal. By varying a position interval of data pointers according to a data rate, an error probability due to a noise can be reduced and a speech quality can be improved.

Abstract: An apparatus for increasing channel capacity in a mobile communication system using a hybrid phase shift keying (HPSK) modulation method. The method includes a walsh code control unit for checking sequences of walsh codes respectively outputted from a first walsh code unit and a second walsh code unit, a walsh rotator for generating a plurality of repeated complex functions and outputting them and a rotator control unit for selecting the repeated complex functions outputted from the walsh rotator according to the sequence of the walsh codes outputted from the first walsh code unit and the second walsh code unit. The method can use all walsh codes and increase reverse channel capacity.

Abstract: A system for preventing signal quality degradation in a CDMA system includes a phase locking unit for controlling a phase of an oscillating frequency signal by controlling a voltage control oscillation unit, a mixer for mixing a frequency oscillation signal and a radio frequency signal received through an antenna, a demodulator for demodulating a signal output from the mixer, a signal detection unit for detecting a signal demodulated by the demodulator, a comparison unit for calculating a constellation and an error vector of the signal detected by the signal detection unit and comparing the constellation and error vector to a setup reference signal, and a controller means for controlling the phase locking unit, mixer and demodulator selectively in accordance with a comparison result of the comparison unit so as to make the constellation and error vector of the signal coincide with the reference signal.

Abstract: A digital filter control method and apparatus is provided. One embodiment of the invention comprises: an analog/digital converter for converting an analog signal to a digital signal; a data processing unit for compressing and error-correcting the digital signal; a coder for coding the signal provided by the data processing unit to an I signal and a Q signal; a digital filter for wave-filtering the I and Q signals; a modulator for modulating the I and Q signals into an intermediate frequency (IF) signal; a mixer for up-converting the IF signal into a radio frequency; a bandpass filter (BPF) for filtering the up-converted radio signal; an amplifier for amplifying the filtered radio frequency signal; and a filter control means for controlling a roll-off factor of the digital filter.