Abstract: An optical fiber coupler includes a plurality of optical fibers parallel to each other in a first direction, an optical fiber array block (FAB) configured to maintain a constant center-to-center distance between the plurality of optical fibers, and an optical waveguide block including a plurality of optical waveguides coupled to the plurality of optical fibers, respectively, and configured to transfer optical signals transmitted through the plurality of optical fibers connected to the optical FAB in a second direction in which a photonics chip is placed and which is different from the first direction.

Abstract: A manufacturing method and application of an optical interconnection module are disclosed. According to example embodiments, by providing the method of manufacturing the optical interconnection module in which an optical fiber optical coupler is disposed at its lower portion by using the FOWLP process, it is possible to provide advantages such as lightness, thinness and compactness of the optical interconnection module, guarantee of signal integrity, and high yield in mass production. Further, it is possible to provide a structure providing an electrical ground to an electronic chip by mounting the electronic chip on ETB and capable of being used as a heat dissipation path.

Abstract: A bidirectional optical transceiver module includes an optical Tx block including a light source configured to output an optical Tx signal; an optical Rx block provided in parallel to the optical Tx block and including a PD configured to receive an optical Rx signal; a wavelength distributor configured to change a travel path of the optical Tx signal; an optical filter provided on a predetermined area of a first surface of the wavelength distributor adjacent to the optical Tx or Rx block and configured to transmit the optical Rx signal and reflect the optical Tx signal; a first lens provided between the optical Tx block and the wavelength distributor; a second lens provided between the optical Rx block and the wavelength distributor; and a third lens configured to output the optical Tx signal to outside and output the optical Rx signal from the outside to the wavelength distributor.

Abstract: An optical coupling method and apparatus are disclosed. The optical coupling method improve the speed of optical alignment between an optical fiber and a grating coupler (GC) of an optical coupling apparatus for a characteristic test of a silicon photonic integrated circuit (Si-PIC) chip by using a reflective grating couplers disposed on the Si-PIC chip.

Abstract: A peptide according to an embodiment of the present in which, in the amino acid sequence of SEQ ID NO: 1, (i) 2nd and 4th amino acids are each substituted with tryptophan (W); (ii) 2nd, 4th, 11st and 13rd amino acids are each substituted with tryptophan; and (iii) 2nd, 4th, 19th, 20th, 22nd, 23rd, 26th and 27th amino acids are each substituted with tryptophan. The peptide can be usefully applied as an active ingredient for antibiotics, cosmetic compositions, food additives, feed additives, biological pesticides and quasi-drugs.

Abstract: A flange grounding device for grounding between flanges in the case that a predetermined interval is present due to a valve and the like being installed between the flanges when connecting pipes includes: a housing provided with an inner space in which an elastic member is installed, and provided with a rear end brought into close contact with the flange of one side; and an extension member installed inside the housing by being supported at one end of the elastic member, and provided with an opposite end protruded outer side through an inlet of the inner space to be brought into close contact with the flange of another side. Accordingly, even though the interval between the flanges is varied, grounding using one type of grounding device may be reliably performed.

Abstract: An antimicrobial peptide according to an embodiment of the present disclosure has the amino acid sequence of SEQ ID NO: 1, wherein i) the 1st and the 20th to the 24th amino acids are deleted, ii) the 1st and the 20th to the 24th amino acids are deleted and the 11th or the 18th amino acid is substituted with lysine (K), or iii) the 1st and the 20th to the 24th amino acids are deleted and the 11th and the 18th amino acids are substituted with lysine (K).

Abstract: The present invention relates to a positive electrode additive for a lithium secondary battery and a positive electrode material including the same, and more particularly, to a positive electrode additive for a lithium secondary battery, which enables stable maintenance of the electrochemical properties of a lithium secondary battery by reducing irreversible capacity loss of a negative electrode and reductions in gelation and gas generation, caused by a conventional positive electrode additive, and a positive electrode material including the same.

Abstract: According to an embodiment, a method for operating an electronic device may comprise operating touch circuitry configured to detect a touch or hovering according to a first driving signal in a first operation mode, detecting a first event related to mode switching, and operating the touch circuitry according to a second driving signal different from the first driving signal in a second operation mode based on detecting the first event. Other embodiments are also possible.

Abstract: A bidirectional optical transceiver module includes an optical Tx block including a light source configured to output an optical Tx signal; an optical Rx block provided in parallel to the optical Tx block and including a PD configured to receive an optical Rx signal; a wavelength distributor configured to change a travel path of the optical Tx signal; an optical filter provided on a predetermined area of a first surface of the wavelength distributor adjacent to the optical Tx or Rx block and configured to transmit the optical Rx signal and reflect the optical Tx signal; a first lens provided between the optical Tx block and the wavelength distributor; a second lens provided between the optical Rx block and the wavelength distributor; and a third lens configured to output the optical Tx signal to outside and output the optical Rx signal from the outside to the wavelength distributor.

Abstract: A portable vacuum antioxidant bag installed in an electron microscope to prevent oxidation of a sample includes a magnet fixing part formed by attaching a flexible magnet to an opening of the portable vacuum antioxidant bag, a gas inlet and a gas outlet formed on two sides of the portable vacuum antioxidant bag, the gas inlet through which gas is injected into the portable vacuum antioxidant bag, and the gas outlet through which air exits the portable vacuum antioxidant bag by the injected gas, and a pair of gloves formed in a shape of hands toward an inside of the portable vacuum antioxidant bag, wherein the portable vacuum antioxidant bag is tightly contact with the electron microscope due to the magnetic force by the magnet fixing part.

Abstract: An optical transceiver and a method of setting a wavelength of the optical transceiver. The optical transceiver may include a thermoelectric cooler (TEC) configured to maintain a constant operating temperature of a transmitter optical sub-assembly (TOSA) of the optical transceiver based on an installation environment of the optical transceiver, a plurality of laser diodes arranged on the top of the TEC and configured to output optical signals having different wavelengths, an optical multiplexer configured to multiplex the optical signals having different wavelengths, output through the plurality of laser diodes, and a wavelength controller configured to control the wavelengths of the optical signals output through the plurality of laser diodes such that optical outputs of the optical signals having different wavelengths, detected through the optical multiplexer, are maximized, wherein the wavelength controller may be individually arranged in one region of each of the plurality of laser diodes.

Abstract: An optical coupling method and apparatus are disclosed. The optical coupling method improve the speed of optical alignment between an optical fiber and a grating coupler (GC) of an optical coupling apparatus for a characteristic test of a silicon photonic integrated circuit (Si-PIC) chip by using a reflective grating couplers disposed on the Si-PIC chip.

Abstract: The present disclosure is related to a positive electrode active material for lithium secondary batteries, a method for preparing the positive electrode active material, and a lithium secondary battery including the positive electrode active material. The positive electrode active material for lithium secondary batteries includes an overlithiated layered oxide (OLO), and the overlithiated layered oxide includes primary particles having a size in a range of 300 nm to 10 ?m in an amount ranging from 50 to 100% by volume with respect to the total overlithiated layered oxide.

Abstract: A portable vacuum antioxidant bag installed in an electron microscope to prevent oxidation of a sample includes a magnet fixing part formed by attaching a flexible magnet to an opening of the portable vacuum antioxidant bag, a gas inlet and a gas outlet formed on two sides of the portable vacuum antioxidant bag, the gas inlet through which gas is injected into the portable vacuum antioxidant bag, and the gas outlet through which air exits the portable vacuum antioxidant bag by the injected gas, and a pair of gloves formed in a shape of hands toward an inside of the portable vacuum antioxidant bag, wherein the portable vacuum antioxidant bag is tightly contact with the electron microscope due to the magnetic force by the magnet fixing part.

Abstract: Proposed is a flange grounding device for grounding between flanges in the case that a predetermined interval is present due to a valve and the like being installed between the flanges when connecting pipes, the device including: a housing provided with an inner space in which an elastic member is installed, and provided with a rear end brought into close contact with the flange of one side; and an extension member installed inside the housing by being supported at one end of the elastic member, and provided with an opposite end protruded outer side through an inlet of the inner space to be brought into close contact with the flange of another side. Accordingly, even though the interval between the flanges is varied, grounding using one type of grounding device may be reliably performed.

Abstract: An optical module includes an interface electrically connected to an external device to receive a data signal to be transmitted, a signal processor configured to perform serialization and signal modulation on the received data signal, an optical transceiver configured to generate an optical transmission signal by receiving a direct current (DC) light source, in which a plurality of light sources having different wavelengths are multiplexed, from an optical power supply and performing optical modulation thereon through the serialized and modulated data signal, and an optical fiber connector configured to output the generated optical transmission signal to the external device and receive an optical reception signal from the external device.

Abstract: An optical transmitting module includes: light sources configured to output optical signals, an optical multiplexer configured to multiplex the optical signals output from the light sources, a collimating lens configured to convert an optical signal output from the optical multiplexer to a form of parallel beam, a package inside which the light sources, the optical multiplexer, and the collimating lens are provided, and an optical isolator disposed on one inner surface of the package, in which the optical signals output from the light sources are multiplexed into a single optical signal through the optical multiplexer disposed inside the package, and the single optical signal passes through the collimating lens and is then optically coupled to an optical fiber stub in a receptacle through a focusing lens disposed outside the package to be output externally.

Abstract: An optical signal transmission apparatus generates a multi-level optical signal from a multi-level electric signal. The optical signal transmission apparatus detects, based on a supervisory signal generated from an optical signal, an electric-to-optical (E/O) conversion characteristic of an E/O converter configured to convert an electric signal into an optical signal. For example, when the E/O converter generates a multi-level optical signal from a multi-level electric signal based on a bias signal, the optical signal transmission apparatus determines a correspondence relationship between the bias signal and the optical signal. The optical signal transmission apparatus adjusts a use range of intensities of the bias signal based on the determined correspondence relationship so that the E/O converter may linearly operate.

Abstract: An optical transmitting module includes: light sources configured to output optical signals, an optical multiplexer configured to multiplex the optical signals output from the light sources, a collimating lens configured to convert an optical signal output from the optical multiplexer to a form of parallel beam, a package inside which the light sources, the optical multiplexer, and the collimating lens are provided, and an optical isolator disposed on one inner surface of the package, in which the optical signals output from the light sources are multiplexed into a single optical signal through the optical multiplexer disposed inside the package, and the single optical signal passes through the collimating lens and is then optically coupled to an optical fiber stub in a receptacle through a focusing lens disposed outside the package to be output externally.