Abstract: A positive electrode active material including a first lithium composite oxide particle including a secondary particle formed by aggregation of one or more primary particles, and a coating oxide occupying at least a part of at least one of surfaces of the secondary particle, grain boundaries between the primary particles, or surfaces of the primary particles, the positive electrode active material satisfying an equation of 1.3?a/b?3.0, wherein a represents a max peak intensity at 2theta=44.75° to 44.80° and b represents a max peak intensity at 2theta=45.3° to 45.6° in X-ray diffraction (XRD) analysis using Cu K? radiation.

Abstract: A wireless communication method and apparatus in a wireless local area network (WLAN) system are disclosed. A wireless communication method according to one embodiment may include generating a high-efficiency Wi-Fi (HEW) frame including at least one of an HEW-SIG-A field and an HEW-SIG-B field which include channel information for communications according to an Orthogonal Frequency-Division Multiple Access (OFDMA) mode, and transmitting the generated HEW frame to a reception apparatus.

Abstract: A water purification apparatus includes a water intake configured to receive water to the water purification apparatus, a filter part including a plurality of filters configured to filter the water and generate purified water, a water outlet including a plurality of water outlet ports configured to discharge the purified water, and one or more pipes that define a water purification path configured to guide the water from the water intake through at least one of the plurality of filters to thereby provide the purified water to at least one of the plurality of water outlet ports.

Abstract: A water purifier is provided.

Abstract: A water purifier includes: a purified water tank storing purified water; a hot water tank connected to the purified water tank to receive the purified water from the purified water tank and including a heater heating the received purified water; a manipulation unit through which an extraction amount of hot water is inputted; and a control unit performing a control to supply the purified water of the purified water tank to the hot water tank by the extraction amount of hot water, when the extraction amount of hot water is inputted to the manipulation unit, and operating the heater to heat the water of the hot water tank. According to the present invention, the power consumption of the water purifier decreases in comparison with a conventional water purifier. Furthermore, it is possible to provide an accurate amount of hot water to a user without using a water level sensor.