Abstract: An optical receiver sub-assembly is provided, which includes a substrate, an optical waveguide device mounted on the substrate to transfer ray incident from a ray source, and a photodetector mounted on the substrate and disposed under a vertical cross-sectional surface of the optical waveguide device, wherein the ray is sequentially reflected and refracted by an upper slope surface and a lower slope surface provided in the vertical cross-sectional surface and is vertically incident on an active area of the photodetector.

Abstract: A residual voltage controller and an electric compressor including the same, which aim to prevent an electric shock or an accident caused by detachment of a high voltage connector through safe interruption of a residual voltage using a plurality of switching elements. The residual voltage controller includes a high voltage connector having an interlock, an inverter part configured to receive power from the high voltage connector, a motor part electrically connected to the inverter part to be controlled, and voltage controllers connected between the high voltage connector and the inverter part in each different direction to interrupt a residual voltage of the motor part when detachment of the high voltage connector is performed before a normal stop signal.

Abstract: According to the present disclosure, pure metal hydrate without chemicals is prepared and is used as a mineral fertilizer to germinate and grow seeds to improve the growth rate of plant sprouts and provide excellent human affinity and absorption rate and abundant amino acids, mineral nutrients, and antioxidants in grown plant sprouts so that it has the advantage of being able to be used as a vegetable raw material for cosmetics, health foods, hangover relievers, etc.

Abstract: A flame-retardant sheet attaching device is disclosed. The flame-retardant sheet attaching device may include a first pressurizing device configured to move in a first direction and apply pressure to a flame-retardant sheet, and a second pressurizing device configured to move in the first direction, the second pressurizing device having at least a portion inserted into a groove of the flame-retardant sheet. The flame-retardant sheet may be configured to move, based on the movement of the second pressurizing device, in a second direction, perpendicular to the first direction. The first pressurizing device may be configured to restrict the movement of the flame-retardant sheet in the first direction, when the flame-retardant sheet moves in the second direction.

Abstract: The present invention provides a polyamic acid aqueous solution composition capable of polymerizing polyamic acid in water rather than in an organic solvent, as well as achieving a high imidization rate during low-temperature curing.

Abstract: The present technology relates to systems and associated methods for measuring properties of particles in a solution. In one or more embodiments, a particle measurement system is configured to generate a reference signal, communicate the reference signal across a plurality of resistors and overlapping pairs of electrodes that define detection regions for particulates traveling through a microchannel, and measure various properties of the particles based on detecting changes in the communicated reference signal.

Abstract: An ink includes a solvent, and light-emitting elements dispersed in the solvent, each of the light-emitting elements comprising semiconductor layers and an insulating film partially surrounding outer surfaces of the semiconductor layers, wherein the solvent has Hansen solubility parameters of a polarity parameter between about 4 and about 9 and a hydrogen bonding parameter between about 6 and about 11.

Abstract: The operating method of a server for providing a metaverse in which a call between user terminals may be performed may include: generating a first avatar based on profile information of a first user terminal and a second avatar based on profile information of a second user terminal; providing a map space in which the first avatar and the second avatar are able to travel; mediating a call between the first user terminal and the second user terminal based on whether a plurality of avatars including the first avatar and the second avatar have entered a first audio space included in the map space; and completing matching between the first user terminal and the second user terminal when a first sign of attraction to the second avatar is transmitted from the first user terminal and a sign of attraction to the first avatar is transmitted from the second user terminal.

Abstract: Disclosed are a composition for an organic optoelectronic device including at least one kind of a first host compound represented by the Chemical Formula 1 and at least one kind of a second host compound represented by the Chemical Formula 2, and an organic optoelectronic device and a display device including the composition.

Abstract: The present disclosure relates to systems and methods for measuring glycated A1c hemoglobin. A glycated hemoglobin level measuring system includes a sample testing apparatus having a microchannel that compresses a blood sample traveling through, a first pair of electrodes coupled to the microchannel, and a second pair of electrodes coupled to the microchannel. The glycated hemoglobin level measuring system further includes an analysis apparatus having sensors coupled to the first and second pairs of electrodes and configured to calculate a travel time taken by a red blood cell to pass through the first and second pairs of electrodes. The glycated hemoglobin level measuring system can use the travel time to measure a rigidity of the red blood cells and the corresponding glycated hemoglobin level.

Abstract: A method for producing a polymer containing metal atoms or halogen atoms at the terminals thereof with excellent efficiency while minimizing or eliminating side reactions or the like is provided. The method can also freely control molecular weight characteristics of the polymer.

Abstract: An embodiment mounting and demounting device for a wireless electronic device includes a pair of holder wings arranged symmetrically to each other and configured to press both sides of the wireless electronic device, a holder wing adjusting device configured to apply a force to adjust a gap between the holder wings using a driving force of a drive motor, a lifting implementing device configured to interlock with the holder wing adjusting device to lift the wireless electronic device upward in a case in which the holder wings are spread apart by a predetermined reference gap or more, a lower housing wrapped around a lower side of the holder wings, the holder wing adjusting device, and the lifting implementing device, and an upper housing coupled to an upper side of the lower housing and configured to allow the wireless electronic device to pass through in an up and down direction.

Abstract: Provided are a compound for improving the luminous efficiency, stability, and lifespan of an organic electronic element, an organic electronic element employing the compound, and an electronic device thereof.

Abstract: Provided are a compound that can improve the luminous efficiency, stability, and lifespan of the element, an organic electronic element using the same, and an electronic device thereof.

Abstract: The present invention relates to an air conditioning device having a waterproof function, and includes a ventilation pipe whose lower end is coupled to a peripheral surface of a vent of an object at the outside of the object so as to communicate with an inner space of the object, a perforated pipe which is installed to be erected on a flat outer surface of the object in parallel with the ventilation pipe, a duct which is connected between an upper end of the ventilation pipe and an upper end of the perforated pipe such that the ventilation pipe and the perforated pipe communicate with each other, and a floating body which is positioned in the inner space of the perforated pipe and vertically moves in the inner space of the perforated pipe according to the amount of water flowing in through holes of the perforated pipe.

Abstract: Provided is an underground laid electric equipment container system including: a box that is laid underground in the form of an opened manhole; a box holder that comprises a horizontal frame that is coupled to an upper surface of the buried box in an sealed state and an inner vertical frame that is upwardly bent from an inner edge of the horizontal frame; a cover, to which a waterproof band covering the entire upper portion of the inner vertical frame is attached, wherein coupling devices with an upper surface of the horizontal fame that allow adhesion between the upper portion of the inner vertical frame and the waterproof band are installed on the cover; and an electric equipment box that is disposed in sealed inner space of the buried box that is formed as the upper portion of the inner vertical frame and the waterproof band are adhered to each other by user's manipulation.

Abstract: Provided is an underground laid electric equipment container system including: a box that is laid underground in the form of an opened manhole; a box holder that comprises a horizontal frame that is coupled to an upper surface of the buried box in an sealed state and an inner vertical frame that is upwardly bent from an inner edge of the horizontal frame; a cover, to which a waterproof band covering the entire upper portion of the inner vertical frame is attached, wherein coupling devices with an upper surface of the horizontal fame that allow adhesion between the upper portion of the inner vertical frame and the waterproof band are installed on the cover; and an electric equipment box that is disposed in sealed inner space of the buried box that is formed as the upper portion of the inner vertical frame and the waterproof band are adhered to each other by user's manipulation.

Abstract: An electronic apparatus includes a storage unit which stores therein a guide program regarding the electronic apparatus, a display unit which displays a three dimensional (3D) view of the electronic apparatus and a tag regarding a hardware component appearing on the 3D view when the guide program is executed, an input unit which receives a user command directing to rotate the 3D view, and a control unit which rotates the 3D view according to the user command, and controls the display unit to display the tag regarding the hardware component appearing on the rotated 3D view.

Abstract: A computer system including a computer main body provided with a hard disk drive (HDD) to retrieve/store data and an HDD driver to drive the hard disk drive to rotate at a predetermined rotational speed, further including a lower noise mode selection part allowing a user to select one between a normal mode and a lower noise mode; and a controller to control the HDD driver to drive the hard disk drive to rotate at a maximum speed when the normal mode is selected and at a minimum speed when the lower noise mode is selected. With this configuration, the present invention provides a computer system and a control method thereof, in which a hard disk drive can be set to a lower noise mode by a user.

Abstract: A computer system including a computer main body provided with a hard disk drive (HDD) to retrieve/store data and an HDD driving part to drive the hard disk drive to rotate at a predetermined rotational speed, further including a lower noise mode selection part allowing a user to select one between a normal mode and a lower noise mode; and a controller to control the HDD driving part to drive the hard disk drive to rotate at a maximum speed when the normal mode is selected and at a minimum speed when the lower noise mode is selected. With this configuration, the present invention provides a computer system and a control method thereof, in which a hard disk drive can be set to a lower noise mode by a user.