Abstract: The present invention relates to a positive electrode active material, and a lithium secondary battery using a positive electrode including the same. More particularly, the present invention relates to a positive electrode active material that has increased efficiency in the diffusion of lithium ions and/or charges and increased structural stability by locally forming regions with different concentrations of an arbitrary transition metal in a primary particle, and a lithium secondary battery using a positive electrode including the same.

Abstract: Proposed is a slim-type heat management system for an electric vehicle, wherein implementation of various heat management modes may be easily accomplished by using a minimum number of parts including two three-way expansion valves and the like, wherein the various heat management modes include a heat pump dehumidification mode, a dehumidification max mode, and the like, which are for defogging, in addition to an indoor cooling mode, a battery cooling mode, and a heat pump mode for heating. Accordingly, the system is capable of being usefully applied to an electric vehicle being small and an electric vehicle having priority of profitability over performance.

Abstract: A massage device for controlling a massage module includes a main frame for supporting body of a user, a massage module for providing a massage to at least a part of the body while moving along the main frame, and a control unit for controlling the massage module, wherein the control unit determines at least one of a standby position, at which the massage module is on standby in the main frame of the massage device, based on whether a massage mode of the massage device has ended, and a standby intensity, which is an intensity at which the massage module presses the body at the standby position, and the control unit controls operation of the massage module based on at least one of the standby position and the standby intensity.

Abstract: Disclosed is a ferritic stainless hot-rolled annealed steel sheet with excellent impact properties of 6 mm or more in thickness and a manufacturing method thereof. A ferritic stainless steel with excellent impact toughness according to an embodiment of the present disclosure includes, in percent (%) by weight of the entire composition, C: more than 0 and 0.01% or less, Si: 0.8% or less, Mn: 0.5% or less, Cr: 10 to 14%, Ti: 0.01 to 0.45%, N: more than 0 and 0.015% or less, the remainder of iron (Fe) and other inevitable impurities, and an average misorientation between grains of microstructure is 0.6 to 1.1°.

Abstract: The present disclosure relates to a massage apparatus comprising a flexible rack gear. A main frame comprises: a rack gear belt comprising a rack gear which is for moving a massage module, has a plurality of holes formed therein, is formed from a flexible material, and extends along a buttocks frame and a back frame comprised in the main frame, wherein the rack gear comprises a buttocks rack gear and a back rack gear and is formed without a connecting portion for connecting the buttocks rack gear and back rack gear; and a rack gear support part which is positioned below the rack gear belt to support the rack gear belt, and is formed from a flexible material.

Abstract: The present disclosure relates to a massage apparatus including an arm massage part, the massage apparatus comprising: a frame connection part which connects a buttock frame provided in a main frame and a back frame provided in the main frame, and which rotates about a frame rotation axis on the basis of the movement of the back frame; a driving shaft which passes through the frame connection part and moves along an arc-shaped driving shaft slot on the basis of the movement of the back frame; and an arm massage frame holder which moves along a sliding rail on the basis of the movement of a plurality of links that transmit the movement of the driving shaft.

Abstract: Provided herein is a massage apparatus including: an arm massage unit for massaging a user's arm; and a control unit for controlling the arm massage unit. The arm massage unit comprises a space and an electrode arranged in the space, and the control unit determines whether an electrical value of the electrode is changed, and controls the operation of the arm massage unit based on a determination result and an operation state of the arm massage unit.

Abstract: A massager having a perineal region massage function and capable of simultaneously applying upward pressure and heat to the perineal region of a user includes: a backrest frame having an opening; a seat frame having an opening that communicates with the opening of the backrest frame; massage units for massaging the body regions of a user while moving along both sides of the backrest frame and the seat frame openings; an elastic band made from an elastic material, traversing the opening of the seat frame, and transmitting to the buttocks or thighs of the user, pressure applied from the massage units through the opening of the seat frame; a perineal region airbag provided on the elastic band and upwardly pressing the perineal region of the user while inflated by means of air supplied from the outside; and an air supply part for injecting/discharging the air into/from the perineal region airbag.

Abstract: The present invention relates to a positive electrode active material for a lithium secondary battery which can simultaneously improve electrochemical properties and stability, which are in a mutual trade-off relationship, by introducing a step structure to a surface part of a lithium composite oxide constituting the positive electrode active material, and a lithium secondary battery including the same.

Abstract: A method of a first communication device for removing a self-interference signal in a wireless communication system is provided. The method includes receiving a signal having a size less than a first threshold value from a second communication device in a first interval within a first frame, transmitting a first signal to a third communication device in the first interval, and estimating a self-interference channel through which the self-interference signal is transmitted based on the signal received in the first interval and the first signal transmitted in the first interval. The self-interference signal is a signal transmitted by the first communication device and is received by the first communication device through the self-interference channel.

Abstract: The disclosure relates to a communication technique and a system for combining a 5G communication system with IoT technology to support a higher data rate after a 4G system. Based on 5G communication and IoT-related technologies, the disclosure may be applied to intelligent services such as smart homes, smart buildings, smart cities, smart or connected cars, healthcare, digital education, retail, and security and safety related services. The disclosure provides a method and apparatus that enable a communication device supporting full duplex to cancel the self-interference signal in the digital domain.

Abstract: Provided is a massage module having an improved degree of freedom, and more particularly, to a massage module having an improved degree of freedom, which, when a force is applied to the massage module, may provide a safe massage to the body of a user by buffering the force. To this end, the massage module may include a massage part that provides a massage to the body of a user, a tilting part that is disposed on one side of the massage part and controls rotation of the massage part, and a height adjustment part that is connected to the tilting part and adjusts a height of the massage part, wherein the massage part includes at least one buffer part disposed at a portion of the massage part that is directly coupled to the tilting part.

Abstract: Provided is a biometric signal measurement device for a massage apparatus, in which an electrode for acquiring a biometric signal of a user acquires the biometric signal while vertically moving in contact with a plantar part of the user, and at the same time, massages the plantar part, thereby improving a massage effect. The biometric signal measurement device for a massage apparatus includes a base part on which a foot of a user is placed, an electrode part that is made of a conductive material, is installed in the base part to be vertically movable, and acquires a biometric signal while in contact with a sole of the user placed on the base part, an electrode driving part that vertically moves the electrode part, and a controller that is electrically connected to the electrode part and analyzes biometric information of the user through the biometric signal acquired by the electrode part.

Abstract: Disclosed are a method for modulation of a variable binary offset carrier (VBOC) having a discrete time-variant frequency and a satellite navigation signal generator using the same. The method for modulation of a VBOC having a discrete time-variant frequency may comprise: generating navigation message data; generating a carrier; generating a VBOC subcarrier; generating a pseudo-random code; synthesizing the pseudo code and the VBOC subcarrier; and synthesizing a synthesized signal of the pseudo code and the VBOC subcarrier, the carrier, and the navigation message data.

Abstract: An independent suspension system includes: a steering unit configured to adjust the steering angle of a wheel; a shock absorber engaged with the wheel in order to absorb impacts applied to the wheel and including a first shock absorber and a second shock absorber, each of which being arranged in a forward-rearward direction on opposite side surfaces of the wheel; and a link unit disposed between the shock absorber and the steering unit in order to vary the distance between the wheel and the steering unit. The link unit includes a first upper arm disposed between the first shock absorber and the steering unit, a second upper arm disposed between the second shock absorber and the steering unit, and a ground clearance adjustment unit engaged with the first and second upper arms in order to vary the distance between the first and second upper arms.

Abstract: The present disclosure provides a massage apparatus including a massage unit capable of providing a feeling of warmth and includes a body massage module which provides a massage function to at least a part of a user's body. The body massage module includes an actuator, which moves the body massage module, and a massage unit which mechanically stimulates the user's body. The massage unit includes a massage ball which provides a feeling of warmth to a user, and the massage ball includes a heating member, which adjusts a temperature of the massage ball, a support shaft member, which fixes the heating member, a cushion member, which surrounds the support shaft member and provides a feeling of a soft massage to the user, and an insert member which maintains a shape of the cushion member.

Abstract: A massage module according to an embodiment includes: a support plate including a circular opening therein; a massage body provided in the circular opening of the support plate; and a rotating mechanism for rotating the massage body relative to the support plate, wherein the massage body includes: a massage unit which provides a massage to a user through mechanical stimulation; a rotating plate provided to be rotatably moved relative to the support plate by the rotating mechanism; and a moving mechanism provided in the rotating plate to move the massage unit in a direction perpendicular to the rotation plane of the rotating plate. The rotating plate includes a through-opening through which the moving mechanism can pass, and the moving mechanism can pass through the through-opening to move the massage unit between a first position and a second position.

Abstract: A noise reduction apparatus for an electric power steering system may include a worm wheel rotatably and integrally coupled to a steering shaft connected to a steering wheel; a worm gear shaft to be rotatably operated by rotational force of an electric motor and formed with a worm gear to be meshed with the worm wheel; a tilt bearing provided between the worm gear shaft and the electric motor to rotatably support one end of the worm gear shaft; a support bearing for rotatably supporting the other end of the worm gear shaft; a plurality of pressing pins for pressing the support bearing; and a plurality of elastic members for elastically supporting the plurality of pressing pins respectively.

Abstract: The present invention discloses a gold-colored steel sheet capable of expressing color without peeling of a modified layer and the gold-colored steel sheet capable of forming a color-modified layer through a conventional annealing process without expensive facilities. A method of manufacturing the gold-colored steel sheet according to an embodiment of the present invention can form a TiN modified layer on a surface of a steel sheet comprising 0.3 to 1.5 wt % of titanium (Ti) by an annealing treatment in a nitrogen (N2) atmosphere at 900 to 1,200° C. for 30 to 300 seconds.

Abstract: An independent suspension system includes: a steering unit configured to adjust the steering angle of a wheel; a shock absorber engaged with the wheel in order to absorb impacts applied to the wheel and including a first shock absorber and a second shock absorber, each of which being arranged in a forward-rearward direction on opposite side surfaces of the wheel; and a link unit disposed between the shock absorber and the steering unit in order to vary the distance between the wheel and the steering unit. The link unit includes a first upper arm disposed between the first shock absorber and the steering unit, a second upper arm disposed between the second shock absorber and the steering unit, and a ground clearance adjustment unit engaged with the first and second upper arms in order to vary the distance between the first and second upper arms.