Abstract: Disclosed is a positive electrode for a lithium-sulfur battery. The positive electrode includes a sulfur-carbon composite as a positive electrode active material. The sulfur-carbon composite includes a porous carbonaceous material having a high porosity and high specific surface area. Therefore, when the sulfur-carbon composite is applied to a battery, the battery shows a reduced initial irreversible capacity and improved output characteristics and life characteristics.

Abstract: Disclosed is a positive electrode for a lithium-sulfur battery, including a sulfur-carbon composite as a positive electrode active material. The sulfur-carbon composite includes a porous carbonaceous material having a high specific surface area, and the total pore volume in the carbonaceous material and a volume of pores having a specific diameter are controlled to specific ranges. Also disclosed is a lithium-sulfur battery using the sulfur-carbon composite. The lithium-sulfur battery shows reduced initial irreversible capacity and improved output characteristics and life characteristics.

Abstract: A positive electrode for a lithium-sulfur battery is provided. The positive electrode includes a positive electrode active material comprising a first and second sulfur-carbon composites respectively comprising a first and a second carbonaceous materials having a different specific surface area and pore volume from each other, and provides reduced initial irreversible capacity and improved output characteristics and life characteristics of a secondary battery.

Abstract: A method for preparing a sulfur-carbon composite including a step of pretreating a carbon material is provided. The method is capable of removing water and other impurities from the carbon material effectively, and the sulfur-carbon composite obtained by the method used as a positive electrode active material of a lithium-sulfur battery provides improved sulfur supportability and over-voltage performance of the lithium-sulfur battery, reduced initial irreversible capacity of the positive electrode active material, and improved output characteristics and life characteristics.

Abstract: An electronic device and a method for transmitting health information by the electronic device are provided. The method includes receiving, from a terminal, a first message requesting the health information; measuring a body condition, in response the first message; and transmitting, to the terminal, a second message including the health information by using human body communication, the health information being based on the measured body condition.

Abstract: An electronic device is provided. The electronic device includes a first antenna for a first band and a second band, a second antenna for the second band and a third band and a pre-processing unit configured to generate, based on identifying a frequency band of a first signal received via the first antenna and a frequency band of a second signal received via the second antenna are the second band, a pre-processed signal by combining the first signal and the second signal based on a ratio of a weight factor, and to transmit the pre-processed signal to a first radio frequency (RF) receiver.

Abstract: A method and apparatus for tracking input positions via Electric Field Communication (EFC) are provided. The apparatus includes a plurality of receiving electrodes for EFC and a receiver unit. The receiving electrodes detect strengths of input electric fields. The receiver unit compares the strengths of the input electric fields with each other and generates position information regarding the input electric fields.

Abstract: A method and apparatus for tracking input positions via Electric Field Communication (EFC) are provided. The apparatus includes a plurality of receiving electrodes for EFC and a receiver unit. The receiving electrodes detect strengths of input electric fields. The receiver unit compares the strengths of the input electric fields with each other and generates position information regarding the input electric fields.

Abstract: An electronic device is provided. The electronic device includes a first antenna for a first band and a second band, a second antenna for the second band and a third band and a pre-processing unit configured to generate, based on identifying a frequency band of a first signal received via the first antenna and a frequency band of a second signal received via the second antenna are the second band, a pre-processed signal by combining the first signal and the second signal based on a ratio of a weight factor, and to transmit the pre-processed signal to a first radio frequency (RF) receiver.

Abstract: A method and apparatus for tracking input positions via Electric Field Communication (EFC) are provided. The apparatus includes a plurality of receiving electrodes for EFC and a receiver unit. The receiving electrodes detect strengths of input electric fields. The receiver unit compares the strengths of the input electric fields with each other and generates position information regarding the input electric fields.

Abstract: A method of communicating with a plurality of bands by using an electronic device including a plurality of antennas, an antenna system, and an electronic device is provided. The method includes providing a first or second band signal received via a first antenna to a first transceiver; receiving a first diversity signal for the second band signal via a second antenna and providing the received first diversity signal to a combiner via a signal divider connected to a second transceiver and the combiner; receiving a second diversity signal for the second band signal via a third antenna and providing the received second diversity signal to the combiner; and combining the first diversity signal and the second diversity signal in the combiner and providing the combined signal to a third transceiver connected to the third antenna.

Abstract: An electronic device and a method for transmitting health information by the electronic device are provided. The method includes receiving, from a terminal, a first message requesting the health information; measuring a body condition, in response the first message; and transmitting, to the terminal, a second message including the health information by using human body communication, the health information being based on the measured body condition.

Abstract: An electronic device and a bias control method thereof are provided. The electronic device includes a channel quality measuring module configured to measure a channel quality of a received signal, a bias offset determining module configured to determine a bias offset based on the measured channel quality, a bias offset applying module configured to modify a bias by applying the determined bias offset to a specified bias value, and a power amplifier configured to amplify transmission power according to the modified bias.

Abstract: A method of controlling an electronic apparatus and the electronic apparatus using the same are provided. The method includes transmitting signals through a medium, receiving and selecting some of the signals transmitted through the medium, and performing or setting a function according to the selected signals.

Abstract: An electronic device and a bias control method thereof are provided. The electronic device includes a channel quality measuring module configured to measure a channel quality of a received signal, a bias offset determining module configured to determine a bias offset based on the measured channel quality, a bias offset applying module configured to modify a bias by applying the determined bias offset to a specified bias value, and a power amplifier configured to amplify transmission power according to the modified bias.

Abstract: An apparatus and a method for reducing wireless data transmission in a personal area network is configured to generate and transmit a packet including information discriminating between a synchronous channel and a data channel. The apparatus and method discriminate between the synchronous channel and data channel when receiving a packet in order to improve data transmission performance of a human body communication system. The apparatus and the method use a transmission channel whose frequency is lower than an antenna frequency as a synchronous channel, and use a transmission channel whose frequency is higher than the antenna frequency as a data channel.

Abstract: A method of communicating with a plurality of bands by using an electronic device including a plurality of antennas, an antenna system, and an electronic device is provided. The method includes providing a first or second band signal received via a first antenna to a first transceiver; receiving a first diversity signal for the second band signal via a second antenna and providing the received first diversity signal to a combiner via a signal divider connected to a second transceiver and the combiner; receiving a second diversity signal for the second band signal via a third antenna and providing the received second diversity signal to the combiner; and combining the first diversity signal and the second diversity signal in the combiner and providing the combined signal to a third transceiver connected to the third antenna.

Abstract: A method of controlling an electronic apparatus and the electronic apparatus using the same are provided. The method includes transmitting signals through a medium, receiving and selecting some of the signals transmitted through the medium, and performing or setting a function according to the selected signals.

Abstract: The present invention proposes a method for transmitting data considering a non-contact state of a human body, while selecting a central frequency in various ranges in the human body communication system. To this end, a first embodiment of the present invention proposes a human body communication system in which a central frequency can be simply moved, and specifically, proposes a data transmission apparatus comprising a frequency shifter which shifts the output of a multiplexer into a specified frequency so as to enable the central frequency to be moved. In addition, a second embodiment of the present invention proposes a human body communication system which controls not only central frequency selection and transmission band minimization, but also a data rate, modulation, etc, and thus can perform stable communication in a non-contact state of a human body. Through this, it is possible to maximize the band efficiency, and to transmit data considering a non-contact state of a human body.

Abstract: Provided is a receiving apparatus for processing an analog baseband signal in an information terminal that communicates using a dielectric. The receiving apparatus includes an electrode for receiving an electric-field signal; a first gain adjuster for gain adjustment by amplifying the received signal; a channel selection filter for selecting a signal corresponding to a receive channel bandwidth from the gain-adjusted signal; a second gain adjuster for gain adjustment by amplifying the selected signal; a comparator for converting a signal output from the second gain adjuster into a digital signal; an oversampler for oversampling the digital signal at a frequency fClock higher than a receive channel frequency fSignal; a demodulator for demodulating the oversampled signal; and a clock generator for providing necessary a clock signal to the oversampler and the demodulator.