Abstract: The inventive concept relates to a thermal conductivity measuring device and a method of measuring the thermal conductivity. The thermal conductivity measuring device may include a first structure which is connected to one side end of a sample and receives heat from a heat source; a second structure connected to the other side end of the sample; a first stage connected to the first structure while supporting the first structure; a second stage connected to the second structure while supporting the second structure; a connection unit connected between the first stage and the second stage; and a measuring unit measuring temperatures of the first and second structures and the first and second stages. Since the thermal conductivity measuring of the inventive concept correct a temperature change of a stage due to heat transmission emitted from the stage considering a measurement environment, reliability of measurement may be improved.

Abstract: The inventive concept relates to a thermal conductivity measuring device. The thermal conductivity measuring device may include a first structure which is connected to one side end of a sample and receives heat from a heat source; a second structure connected to the other side end of the sample; a first stage connected to the first structure while supporting the first structure; a second stage connected to the second structure while supporting the second structure; a connection unit connected between the first stage and the second stage; and a measuring unit measuring temperatures of the first and second structures and the first and second stages. Since the thermal conductivity measuring of the inventive concept correct a temperature change of a stage due to heat transmission emitted from the stage considering a measurement environment, reliability of measurement may be improved.

Abstract: The inventive concept relates to a thermal conductivity measuring device. The thermal conductivity measuring device may include a first structure which is connected to one side end of a sample and receives heat from a heat source; a second structure connected to the other side end of the sample; a first stage connected to the first structure while supporting the first structure; a second stage connected to the second structure while supporting the second structure; a connection unit connected between the first stage and the second stage; and a measuring unit measuring temperatures of the first and second structures and the first and second stages. Since the thermal conductivity measuring of the inventive concept correct a temperature change of a stage due to heat transmission emitted from the stage considering a measurement environment, reliability of measurement may be improved.

Abstract: The inventive concept relates to a thermal conductivity measuring device and a method of measuring the thermal conductivity. The thermal conductivity measuring device may include a first structure which is connected to one side end of a sample and receives heat from a heat source; a second structure connected to the other side end of the sample; a first stage connected to the first structure while supporting the first structure; a second stage connected to the second structure while supporting the second structure; a connection unit connected between the first stage and the second stage; and a measuring unit measuring temperatures of the first and second structures and the first and second stages. Since the thermal conductivity measuring of the inventive concept correct a temperature change of a stage due to heat transmission emitted from the stage considering a measurement environment, reliability of measurement may be improved.

Abstract: The inventive concept relates to a thermal conductivity measuring device and a method of measuring the thermal conductivity. The thermal conductivity measuring device may include a first structure which is connected to one side end of a sample and receives heat from a heat source; a second structure connected to the other side end of the sample; a first stage connected to the first structure while supporting the first structure; a second stage connected to the second structure while supporting the second structure; a connection unit connected between the first stage and the second stage; and a measuring unit measuring temperatures of the first and second structures and the first and second stages. Since the thermal conductivity measuring of the inventive concept correct a temperature change of a stage due to heat transmission emitted from the stage considering a measurement environment, reliability of measurement may be improved.

Abstract: Provided are a thermoelectric device and a method of manufacturing the same. The thermoelectric device includes a substrate, a first electrode having a first comb shape connected to one side of the substrate and open to the other side of the substrate, a second electrode having a second comb shape connected to the other side of the substrate and open to the one side of the substrate and inserted into the first electrode, and first and second thermoelectric medium layers disposed between the first electrode and the second electrode and alternately disposed in a direction apart from the substrate.

Abstract: Provided is a thermoelectric device including two legs having a rough side surface and a smooth side surface facing each other. Phonons may be scattered by the rough side surface, thereby decreasing thermal conductivity of the device. Flowing paths for electrons and phonons may become different form each other, because of a magnetic field induced by an electric current passing through the legs. The smooth side surface may be used for the flowing path of electrons. As a result, in the thermoelectric device, thermal conductivity can be reduced and electric conductivity can be maintained.

Abstract: A power transmitter includes a signal processor that externally obtains a reception power state signal depending on variation of a distance between transmission and reception coil units, a modulation controller configured to a modulation frequency for selecting a frequency band having maximum power transmission performance, based on the reception power state signal, a power signal generator that generates a power signal, and a modulator that modulates the power signal in response to the modulation frequency, the reception coil unit being configured to transmit the modulated signal. A power receiver includes a reception coil unit that receives a power signal, a power generator that generates power by receiving the power signal from the reception coil unit, and a signal generator that generates a reception power state signal depending on the generated power level and transmits the latter signal to a transmission coil unit corresponding to the reception coil unit.

Abstract: A thermoelectric device is provided. The thermoelectric device includes first and second electrodes, a first leg, a second leg, and a common electrode. The first leg is disposed on the first electrode and includes one or more first semiconductor pattern and one or more first barrier patterns. The second leg is disposed on the second electrode and includes one or more second semiconductor pattern and one or more second barrier patterns. The common electrode is disposed on the first leg and the second leg. Herein, the first barrier pattern has a lower thermal conductivity than the first semiconductor pattern, and the second barrier pattern has a lower thermal conductivity than the second semiconductor pattern. The first/second barrier pattern has a higher electric conductivity than the first/second semiconductor pattern. The first/second barrier pattern forms an ohmic contact with the first/second semiconductor pattern.

Abstract: The inventive concept relates to a thermal conductivity measuring device and a method of measuring the thermal conductivity. The thermal conductivity measuring device may include a first structure which is connected to one side end of a sample and receives heat from a heat source; a second structure connected to the other side end of the sample; a first stage connected to the first structure while supporting the first structure; a second stage connected to the second structure while supporting the second structure; a connection unit connected between the first stage and the second stage; and a measuring unit measuring temperatures of the first and second structures and the first and second stages. Since the thermal conductivity measuring of the inventive concept correct a temperature change of a stage due to heat transmission emitted from the stage considering a measurement environment, reliability of measurement may be improved.

Abstract: Provided are a wireless power transmission receiver and a system including the same, particularly to a receiver and transmitter transmitting power from one transmitter to a plurality of receivers at the same time by wireless. According to the present invention, the wireless power receiver comprises a receiving coil unit receiving power from a transmitter by a resonance coupling method; and a power receiving unit receiving power from the receiving coil unit to provide the power to a load resistor, wherein an input impedance of the power receiving unit is adjusted according to power consumed by a plurality of receivers. Therefore, power transmission efficiency of the wireless power receiver and transmitter can be improved.

Abstract: Provided is a thermoelectric device including two legs having a rough side surface and a smooth side surface facing each other. Phonons may be scattered by the rough side surface, thereby decreasing thermal conductivity of the device. Flowing paths for electrons and phonons may become different form each other, because of a magnetic field induced by an electric current passing through the legs. The smooth side surface may be used for the flowing path of electrons. As a result, in the thermoelectric device, thermal conductivity can be reduced and electric conductivity can be maintained.

Abstract: Disclosed is a wireless power transferring device which includes a power generating unit configured to generate a power using a solar battery; a power charging unit including a super capacitor or a battery and configured to charge the generated power to retain a power; and a transmission unit configured to convert the power of the charging unit into a high frequency to send the high frequency wirelessly.

Abstract: Disclosed is a wireless power transmitting and receiving device which includes a wireless power receiving device comprising a receiving coil configured to receive a non-radiated electromagnetic wave; and a frequency adjusting unit configured to adjust a resonant frequency of the receiving coil and a wireless power transmitting device comprising a transmission coil configured to generate a non-radiated electromagnetic wave by magnetic induction with a power coil; and a frequency adjusting unit configured to adjust a resonant frequency of the transmission coil. The frequency adjusting unit adjusts a resonant frequency of the receiving coil by closing a surroundings of the receiving coil by a magnetic sheet. The frequency adjusting unit adjusts a resonant frequency of the transmission coil by inserting a magnetic sheet in the transmission coil.

Abstract: A power transmitter includes a signal processor that externally obtains a reception power state signal depending on variation of a distance between transmission and reception coil units, a modulation controller configured to a modulation frequency for selecting a frequency band having maximum power transmission performance, based on the reception power state signal, a power signal generator that generates a power signal, and a modulator that modulates the power signal in response to the modulation frequency, the reception coil unit being configured to transmit the modulated signal. A power receiver includes a reception coil unit that receives a power signal, a power generator that generates power by receiving the power signal from the reception coil unit, and a signal generator that generates a reception power state signal depending on the generated power level and transmits the latter signal to a transmission coil unit corresponding to the reception coil unit.

Abstract: Disclosed are a thermoelectric device based on silicon nanowires including: a substrate; a silicon heat absorbing part absorbing heat, a silicon nanowire leg transferring heat, and a silicon heat releasing part releasing heat, which are formed on the substrate; and an insulating film with at least one or more holes, which is formed on the substrate including the silicon heat absorbing part, the silicon nanowire leg, and the silicon heat releasing part, and a method for manufacturing the same.

Abstract: Provided are a thermoelectric device and a method of forming the same, a temperature sensing sensor, and a heat-source image sensor using the same. The thermoelectric device includes a first nanowire and a second nanowire, a first silicon thin film, a second silicon thin film, and a third silicon thin film. The first nanowire and a second nanowire are disposed on a substrate. The first nanowire and the second nanowire are separated from each other. The first silicon thin film is connected to one end of the first nanowire. The second silicon thin film is connected to one end of the second nanowire. The third silicon thin film is connected to the other ends of the first nanowire and the second nanowire. The first and second nanowires extend in a direction parallel to an upper surface of the substrate.

Abstract: A thermoelectric device includes: a substrate; a first nanowire of a first conductive type, which is formed on one side of the substrate; a second nanowire of a second conductive type, which is opposed to the first nanowire; a high temperature part commonly connected to one end of the first nanowire and one end of the second nanowire; low temperature parts connected to the other end of the first nanowire and the other end of the second nanowire, respectively; an insulation layer formed on the first nanowire and the second nanowire; a first metal layer formed on a portion of the insulation layer over the first nanowire, so as to control an electric potential of the first nanowire; and a second metal layer formed on a portion of the insulation layer over the second nanowire, so as to control an electric potential of the second nanowire.

Abstract: Provided are gas storage medium, a gas storage apparatus having the same and a method thereof. The gas storage medium includes a plurality of material layers each having a variable valence, wherein each of the material layers includes redundant electrons that are not participated in chemical bonding.

Abstract: Provided is a wireless power transfer device. The wireless power transfer device includes an power generator, and two or more non-radiative electromagnetic wave generators. The power generator generates AC type of power. The non-radiative electromagnetic wave generators receive the power, and generate non-radiative electromagnetic waves through resonance. The non-radiative electromagnetic wave generators are disposed to form a wireless power transfer-enabled transfer area.