Abstract:
The present invention relates to a light emitting diode (LED) chip, in which a hybrid sensor is formed in a nitride-based LED structure. A chip structure embedded with such a hybrid sensor functions as an LED light emitting sensor which can monitor environmental pollution while functioning as a lighting element at the same time and has an effect of being used as a variety of environment pollution sensors according to the type of an electrode material.
Abstract:
An optical fiber vibration sensor includes a polarization-diversity loop based interference unit having a polarization-maintaining fiber configured to generate an interference spectrum, a polarizing beam splitter connected to the polarization-maintaining fiber and configured to split light incident from a narrowband light source into two polarized beams, and a polarization controller connected to the polarization-maintaining fiber or the polarizing beam splitter and configured to control the two polarized beams split through the polarizing beam splitter, and an optical fiber vibration test unit combined to the polarization-maintaining fiber so as to apply an external vibration to the polarization-maintaining fiber, wherein light output intensity of the polarization-diversity loop based interference unit is converted to an electrical signal by a light detector, and the vibration applied to the polarization-maintaining fiber may be measured through the optical fiber vibration test unit.
Abstract:
The electrode structure for measuring a bio-signal and an apparatus for measuring an electrocardiogram using the same are disclosed. The electrode structure for measuring a bio-signal, comprises an electrode pad to measure bio-signals based on capacitive coupling between the electrode pad and human skin; an absorption layer formed at one side of the electrode pad; and a preamplifier which is electrically connected with the electrode pad and filters noise from the bio-signals from the electrode pad and amplifies and outputs the signals. Thus, the initial noise stabilization time can be reduced, and stable electrocardiogram signals can be obtained quickly without noises.
Abstract:
A method of performing beam tracking in high-speed mobile UAV communications by a base station (BS) according to an embodiment of the present invention may comprise an initial beam training step including an operation of confirming an initially estimated channel for a k-th UAV among a plurality of UAVs connected through an antenna, and an operation of confirming an mk-th column index that maximizes an absolute value of a beam domain channel as an initial AoA; and a beam tracking step including an operation of tracking an actual AoA by applying a KF to the initial AoA, and various other embodiments may be possible.
Abstract:
A device and method for estimating fish growth based on a modified fish growth model. The device includes a growth factor data input unit configured to receive growth factor data including an initial average weight Wi, a final average weight Wf, a total supplied feed amount F, and a rearing period D about a growth estimation target fish; a first growth information calculation unit configured to apply the growth factor data received from the growth factor data input unit to the modified fish growth model to calculate first growth information of the growth estimation target fish based on the modified fish growth model; and a display for outputting the first growth information calculated by the first growth information calculation unit on a screen thereof.
Abstract:
The present disclosure relates to an optical transfer device for tissue treatment. An optical transfer device of the present disclosure includes an optical probe having a light divergence part at the longitudinal end thereof, and a coating part configured to surround the optical probe, wherein the coating part includes a light diffusion part formed at the end thereof configured to cover the light divergence part, the light diffusion part having multiple grooves formed thereon.
Abstract:
A method and an apparatus for recovering copper, bronze and lead by allowing methane gas to flow into a reactor and heat-treating a mixture of copper oxide, tin oxide and lead oxide under a temperature condition of 700-900° C. is disclosed. The method includes placing a mixture of copper oxide, tin oxide and lead oxide in a reactor, increasing the temperature inside the reactor, and allowing a reductive gas to flow into the reactor so as to heat-treat the mixture.
Abstract:
The present invention relates to a conjugated polymer compound for a polymer solar cell donor represented by the following chemical formula 1 and a polymer solar cell comprising same: (in chemical formula 1 above, n is an integer greater than or equal to 2, Ar1 and Ar2 are each independently substituted or unsubstituted thienylene, substituted or unsubstituted thieno[3,2-b]thiophene, or a bond, R1 is substituted or unsubstituted 2-thienyl or substituted or unsubstituted phenyl, R2 is hydrogen or fluorine, and R3 is 2-ethylhexyl).
Abstract:
Disclosed is a method for separating nickel powders and cobalt powders from each other in a mixture of nickel powders and cobalt powders. The method includes a first step of heating a mixture of nickel powders and cobalt powders received in a container to a temperature of 350° C. to 500° C.; and a second step of reacting the heated mixture with a magnet to separate the nickel powders and the cobalt powders from each other, wherein in the second step, not the nickel powders but the cobalt powders react with the magnet, and thus the cobalt powders move out of the container and thus are separated from the nickel powders.
Abstract:
Disclosed is a method for separating nickel powders and cobalt powders from each other in a mixture of nickel powders and cobalt powders. The method includes a first step of heating a mixture of nickel powders and cobalt powders received in a container to a temperature of 350° C. to 500° C.; and a second step of reacting the heated mixture with a magnet to separate the nickel powders and the cobalt powders from each other, wherein in the second step, not the nickel powders but the cobalt powders react with the magnet, and thus the cobalt powders move out of the container and thus are separated from the nickel powders.