Abstract: A thermal management system for a fuel cell includes: a fuel cell stack; a heater connected with the fuel cell stack in parallel through a coolant channel and configured to heat coolant; a pump circulating the coolant; a bypass valve controlling a flow rate of the coolant to be supplied to the fuel cell stack or the heater; a radiator allowing the coolant to exchange heat with external air; a heat dissipation fan supplying the external air to the radiator; a temperature control valve controlling the flow rate of the coolant flowing through the radiator; a temperature sensor disposed at an outlet of the fuel cell stack or an outlet of the heater; and a controller controlling the heater, the pump, the bypass valve, the heat dissipation fan, or the temperature control valve on the basis of temperature sensed by the temperature sensor.

Abstract: An eccentric bush assembly structure of a scroll compressor, in which an orbiting scroll is eccentrically coupled to a rotary shaft of a drive motor, including a bush body rotatably coupled to the orbiting scroll while being pinned to the rotary shaft of the drive motor by an eccentric shaft, the bush body having a friction prevention groove formed in a surface facing a tip surface of the rotary shaft so as not to come into frictional contact with the tip surface.

Abstract: Disclosed are a lyocell material for a cigarette filter and a method of preparing the same, wherein a crimped tow is manufactured using a lyocell multifilament including low-strength lyocell monofilaments, and thus the ultimately prepared lyocell material for a cigarette filter can exhibit low strength, thereby increasing processing efficiency during the manufacture of the cigarette filter.

Abstract: An electric compressor and a method of controlling the same, the electric compressor including a detection unit for detecting a phase of refrigerant in the electric compressor, a connection unit wound at a position adjacent to a passage of a housing for movement of a refrigerant in the electric compressor, and a control unit for performing control according to the phase of refrigerant by differently controlling power applied to the connection unit in response to data detected by the detection unit. The method including aligning a position of a rotor after an electric compressor is turned on, determining whether a refrigerant is in liquid phase or in gas phase, preheating the refrigerant by applying power to the electric compressor according to the phase of refrigerant, and controlling the electric compressor such that the electric compressor is normally operated after the refrigerant is preheated.

Abstract: Disclosed herein is a compressor that includes a casing, a fastening part disposed at a portion corresponding to a support bracket provided in a compressor mounting part of a vehicle on the casing, and a fastener connecting the support bracket to the fastening part, wherein a compressor's center of gravity and a compressor's point of support supported by the fastener are positioned in a longitudinal direction of the fastener. The present disclosure has an effect of relieving rotational moment and fatigue stress occurring in the compressor when the compressor is mounted to the vehicle.

Abstract: An operation control method of a fuel cell system is provided that increases the output of a fuel cell stack by detecting and overcoming the cause of a performance limit when the stack reaches the performance limit during high-altitude operation of a fuel cell vehicle, thereby achieving higher stack performance and vehicle power performance. The method includes determining whether an operation state of the stack corresponds to a predetermined condition in which a stack output limit occurs by determining current operation state information of the stack. Additionally, operating pressure of an air pole is adjusted by changing an opening degree of an air pressure adjusting valve to a control command value based on the operation state of the stack when the operation state corresponds to the predetermined condition in which the stack output limit occurs.

Abstract: A flexible display device includes a flexible display panel and a window member. The flexible display device includes a folding area and a peripheral area disposed adjacent to the folding area. The window member includes at least first and second base layers. The second base layer is overlapped with the first base layer and has a modulus of elasticity that is higher than that of the first base layer. A thickness of a first portion of the first base layer, which is overlapped with the folding area, is greater than a thickness of a second portion of the first base layer, which is overlapped with the peripheral area.

Abstract: An electric transportation system is disclosed. In one aspect, the system includes a wheel, a rechargeable battery having positive and negative poles, and a motor mechanically connected to the wheel and configured to generate a regeneration charge current, the motor including a coil. The system also includes a motor driver connected to the motor and the battery. The motor driver is configured to discharge the battery during a supply period so as to drive the motor and charge the battery with the regeneration charge current, wherein the motor driver includes a plurality of transistors electrically connected to the negative pole during a non-driving period. The system further includes a controller connected to the motor driver and configured to control the motor driver so as to drive the motor during the supply period and control the motor driver so as to charge the battery during the non-driving period.

Abstract: Semiconductor devices are provided including a first fin-shaped pattern having first and second sidewalls facing one another and a field insulating film contacting at least a portion of the first fin-shaped pattern. The first fin-shaped pattern includes a lower portion of the first fin-shaped pattern contacting the field insulating film; an upper portion of the first fin-shaped pattern not contacting the field insulating film; a first boundary between the lower portion of the first fin-shaped pattern and the upper portion of the first fin-shaped pattern; and a first fin center line perpendicular to the first boundary and meeting the top of the upper portion of the first fin-shaped pattern. The first sidewall of the upper portion of the first fin-shaped pattern and the second sidewall of the upper portion of the first fin-shaped pattern are asymmetric with respect to the first fin center line.

Abstract: A monolithic microwave integrated circuit (MIMIC) for a phased array antenna system, and a phased array antenna system including the MIMIC are provided. The MIMIC includes a first amplifier including a first input terminal and a first output terminal, a second amplifier including a second input terminal and a second output terminal, a first switch connectable to the first input terminal and the second output terminal, and a second switch connectable to the first output terminal and the second input terminal.

Abstract: A low flow control method for a fuel cell includes: determining whether or not the fuel cell enters a low flow control mode, dividing a low flow control operation into a plurality of low flow control stages upon determining that the fuel cell enters the low flow control mode, and controlling a power generation quantity of the fuel cell according to the low flow control stages.

Abstract: The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate successive to a 4G communication system such as LTE. The present disclosure provides a communication method of a Base Station (BS) using an Integer Forcing (IF) scheme in a Multi-User Multiple-Input and Multiple-Output (MU-MIMO) communication system, the method including: receiving a reception signal including a desired signal transmitted from at least one User Equipment (UE) served by the BS and an interference signal transmitted from at least one UE served by a neighboring BS; determining an IF filter considering the interference signal based on information on the interference signal received from the neighboring BS; filtering the reception signal using the determined IF filter; and detecting or decoding at least one of the desired signal and the interference signal using the filtered reception signal.

Abstract: The present invention relates to a MIG welding system including: operating a vision module and a welding device; capturing a thermal image of a welding part using an IR thermal camera connected to the vision module, converting the image into a video signal, and transmitting the video image to the vision module; detecting whether there is slag through the vision module; determining whether the detected slag is fixed when the slag is detected through the vision module; and analyzing the position of the slag and calculating a coordinate value when it is determined that the detected slag is fixed. Even if the slag is not checked with the naked eye, the operator can determine the position of the fixed slag which is not checked with the naked eye through the calculated coordinate values.

Abstract: The present invention relates to a method for mass-production of viniferin using stevioside from cell culture of grape tree tissue. Viniferin is known to be effective for protection of liver, anticancer, antioxidant, and skin whitening, have an effect of inhibiting oxidation of low-density lipoprotein and high-density lipoprotein and inhibiting the proliferation and migration of vascular smooth muscle cells. Therefore, the present invention is very useful for the mass production of viniferin among the useful substances (stilbene compounds) from a callus derived from the anther tissue of the grape plant, which is very important for the related industries.

Abstract: An operation method of a server in a communication network includes receiving a connection request message from each of a plurality of gateways connected to the server; identifying a service level of a terminal that has transmitted the connection request message based on information included in the connection request message; selecting a first gateway corresponding to the service level among the plurality of gateways as a gateway to which the terminal is to be connected; and transmitting a connection approval message, which is a response to the connection request message, to the terminal through the first gateway.

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). An apparatus and a method for searching neighboring cells in a wireless communication system are provided. The method includes receiving, from adjacent base stations, a part of a first set of reference signals that are beamformed using different transmission beams arranged in a first order, the part of the first set of the reference signals being received during a first measurement interval in a first time interval, and receiving, from the adjacent base stations, a part of a second set of the reference signals that are beamformed using different transmission beams arranged in a second order, which is different from the first order, the part of the second set of the reference signals being received during a second measurement interval in a second time interval.

Abstract: The present invention relates a scroll compressor. According to an exemplary embodiment of the present invention, the scroll compressor includes: an orbiting scroll configured to be seated on one surface of a main frame and provided with a plurality of seating grooves along a circumferential direction; a stepped part configured to be formed in the seating groove; a ring member configured to be inserted into the seating groove and have a lower surface adhering to the stepped part; and a guide pin configured to have one end fixed to the main frame and the other end extended in an inside length of the ring member, in which the guide pin has the end maintained in a spaced state from the stepped part.

Abstract: A method for receiving a signal by integer forcing in a wireless communication system is provided. The method includes receiving one or more signals through a plurality of antennas, filtering the received one or more signals using a forcing matrix, generating codewords by remapping the filtered one or more signals, acquiring a summed codeword by performing a modulo operation on the codewords, decoding the summed codeword, and acquiring original codewords by performing an inversion operation on the decoded summed codeword.