Abstract: A method and a system for implementing a task assistant are provided. The method according to some embodiments may include receiving a user's command including a task description regarding a target task, generating a screen description by analyzing a screen of a task execution device, configuring a first prompt for determining a first action associated with the target task based on the task description and the screen description, determining the first action by inputting the first prompt to a generative model and executing the first action through the task execution device.

Abstract: Disclosed are a positive electrode active material, a positive electrode including the same, and a rechargeable lithium battery, the positive electrode active material includes a first positive electrode active material including a layered lithium nickel-manganese-based composite oxide and a second positive electrode active material including a lithium-manganese rich composite oxide in which a molar ratio of lithium to a total metal excluding lithium is about 1.1 to about 3 and a manganese content is greater than or equal to about 60 mol % based on 100 mol % of a total metal excluding lithium in the lithium-manganese rich composite oxide.

Abstract: Disclosed are a positive electrode active material, a method of preparing the same, a positive electrode, and a rechargeable lithium battery, the positive electrode active material including core particles including a layered lithium nickel-manganese-based composite oxide having a nickel content of greater than or equal to about 60 mol % based on 100 mol % of a total metal excluding lithium in the layered lithium nickel-manganese-based composite oxide, and a coating layer on the surface of the core particle and including Al, wherein an Al content based on a total of 100 at % of Ni, Mn, and Al on a surface of the positive electrode active material is about 20 at % to about 33 at %.

Abstract: A positive electrode active material, a method of preparing the same, a positive electrode, and a rechargeable lithium battery including the same are disclosure. The positive electrode active material includes core particles including a layered lithium nickel-manganese-based composite oxide having a nickel content (e.g., amount) of greater than or equal to about 60 mol % based on 100 mol % of a total metal in the positive electrode active material excluding lithium, and a coating layer located on the surface of the core particles and containing Al, wherein an Al content (e.g., amount) of the coating layer is about 0.5 mol % to about 1.5 mol % based on 100 mol % of a total metal in the layered lithium nickel-manganese-based composite oxide excluding lithium, and the coating layer has a fiber shape (e.g., in a form of fibers, having a fibrous structure, etc.).

Abstract: A positive electrode active material includes a plurality of core particles including a layered lithium nickel-manganese-based composite oxide having a nickel content (e.g., amount) of greater than or equal to about 60 mol % based on 100 mol % of a total metal composition of the lithium nickel-manganese-based composite oxide excluding lithium, and a coating layer located on the surface of the core particle and containing Al and Ti. Also disclosed are a method of preparing the positive electrode active material, and a positive electrode and rechargeable lithium battery including the same.

Abstract: A method performed by an apparatus in a wireless local area network (WLAN) is provided. The method includes: transmitting a first NDP Announcement frame for a first variant and a second NDP Announcement frame for a second variant in A-PPDU transmission, wherein the first NDP Announcement frame for the first variant and the second NDP Announcement frame for the second variant have a same time duration and are transmitted in different frequency bands; and transmitting at least one Sounding NDP for the first variant for both at least one first STA for the first variant and at least one second STA for the second variant, wherein the first variant is based on a first protocol standard and the second variant is based on a second protocol standard, and wherein the second protocol standard is beyond version of the first protocol standard.

Abstract: A positive electrode active material, a method of preparing the same, a positive electrode and a rechargeable lithium battery including the same are disclosed. The positive electrode active material includes core particles including a layered lithium nickel-manganese-based composite oxide, a first coating layer disposed on a surface of the core particles and containing Al, and a second coating layer disposed on the first coating layer and containing Mn.

Abstract: Disclosed are a positive electrode active material, a method of preparing the same, and a positive electrode and a rechargeable lithium battery including the same, the positive electrode active material including core particles including a layered lithium nickel-manganese-based composite oxide, a first coating layer on a surface of the core particles and containing Al, and a second coating layer on the first coating layer and containing Co.

Abstract: A positive electrode active material includes a core particle including a layered lithium nickel-manganese-based composite oxide, a first coating layer provided on the surface of the core particle and including Al, and a second coating layer provided on the first coating layer and including Ni. A method for preparing a positive electrode active material includes: mixing a layered nickel-manganese composite hydroxide and a lithium raw material and performing a first heat treatment to obtain a lithium nickel-manganese-based composite oxide, adding an aluminum (Al) raw material to an aqueous solvent, adding the lithium nickel-manganese composite oxide thereto and mixing them, then adding a nickel (Ni) raw material and mixing them, and drying the mixture and performing a second heat treatment.

Abstract: A positive electrode active material includes a first positive electrode active material that includes a lithium nickel-manganese-based composite oxide having a nickel content of greater than or equal to about 60 mol % based on 100 mol % of a total metal excluding lithium in the first positive electrode active material and is in a form of secondary particles in which a plurality of primary particles are agglomerated, a second positive electrode active material in a form of single particles including a lithium nickel-manganese-based composite oxide having a nickel content of greater than or equal to about 60 mol % based on 100 mol % of a total metal excluding lithium in the second positive electrode active material, and a third positive electrode active material in a form of particles including lithium manganese-based oxide. In addition, a positive electrode and a rechargeable lithium battery each including the positive electrode active material are disclosed.

Abstract: Disclosed are positive electrode active materials, positive electrodes, and a rechargeable lithium battery including the same. Some of the positive electrode active materials include particles of a first positive electrode active material including lithium cobalt-based oxide, and particles of a second positive electrode active material including a layered lithium nickel-manganese-based composite oxide having a nickel content of greater than or equal to about 60 mol % based on 100 mol % of a total metal excluding lithium, wherein the first positive electrode active material or the second positive electrode active material includes a coating layer including yttrium.

Abstract: A positive electrode active material, a method of preparing the same, a positive electrode and a rechargeable lithium battery including the same are provided. The positive electrode active material includes core particles including a lithium nickel-manganese-based composite oxide having a nickel content (e.g., amount) of greater than or equal to about 60 mol % based on 100 mol % of a total metal in the positive electrode active material excluding lithium, and a coating layer disposed on the surface of the core particles and including Al, Zr, and Mg.

Abstract: A positive electrode active material includes: a first positive electrode active material including a lithium nickel-manganese composite oxide having a nickel content of at least about 60 mol % based on a total metal excluding lithium and being in a form of secondary particles each including a plurality of primary particles; and a second positive electrode active material including a lithium nickel-manganese-based composite oxide having a nickel content of at least about 60 mol % based on a total metal excluding lithium and being in a form of single particles and a coating layer on the surface of the single particle and containing aluminum and yttrium, an aluminum content of the coating layer being about 0.1 mol % to about 2 mol % and an yttrium content of the coating layer being about 0.1 mol % to about 1 mol %, based on a total metal excluding lithium in the second positive electrode active material.

Abstract: A positive electrode active material including a first positive electrode active material including a lithium nickel-manganese-based composite oxide having a nickel content of greater than or equal to about 60 mol % based on about 100 mol % of a total metal excluding lithium and including secondary particles made by agglomerating a plurality of primary particles wherein an average particle diameter (D50) of the secondary particle is about 10 ?m to about 20 ?m, a second positive electrode active material including a lithium nickel-manganese-based composite oxide having a nickel content of greater than or equal to about 60 mol % based on about 100 mol % of a total metal excluding lithium and including single particles wherein an average particle diameter (D50) of each of the single particles is about 2 ?m to about 8 ?m, and a third positive electrode active material includes particles including lithium transition metal phosphate.

Abstract: An apparatus for training a reinforcement learning model according to an embodiment includes a starting point determinator configured to determine starting points from an input value of a combinatorial optimization problem, a multi-explorer configured to generate exploration trajectories by performing exploration from each of the starting points using a reinforcement learning model, a trajectory evaluator configured to calculate an evaluation value of each of the exploration trajectories using an evaluation function of the combinatorial optimization problem, a baseline calculator configured to calculate a baseline for the input value from the evaluation value of each exploration trajectory, an advantage calculator configured to calculate an advantage of each of the exploration trajectories using the evaluation value of each exploration trajectory and the baseline, and a parameter updater configured to update parameters of the reinforcement learning model by using the exploration trajectories and the advantage

Abstract: A method performed by a transmitter in a wireless local area network (WLAN) includes: determining to operate in A(aggregated)-PPDU transmission, wherein the A-PPDU transmission includes transmission of multiple sub-PPDUs with different variants; and transmitting, to a receiver, a trigger frame including a first field and a second field, wherein the first field indicates whether a first special user information field including first additional common information for a first variant is present; and wherein the second field indicates whether a second special user information field including second additional common information for a second variant is present, and wherein the first special user information field is located before the second special user information field in the trigger frame.

Abstract: A positive electrode active material, a method of preparing the same, a positive electrode and a rechargeable lithium battery including the same are provided. The positive electrode active material includes a core particle including lithium nickel-manganese-aluminum-based composite oxide and a coating layer disposed on a surface of the core particles and containing aluminum and yttrium, wherein a nickel content (e.g., amount) in the core particle is greater than or equal to about 60 mol % based on 100 mol % of a total metal excluding lithium in the positive electrode active material, and an aluminum content (e.g., amount) of the coating layer is about 0.1 mol % to about 2 mol %, and a yttrium content (e.g., amount) of the coating layer is about 0.05 mol % to about 1 mol %, each based on 100 mol % of the total metal excluding lithium in the positive electrode active material.

Abstract: A positive electrode active material of a rechargeable lithium battery may include a core particle including a lithium nickel-manganese-aluminum-based composite oxide, and a coating layer disposed on a surface of the core particle and including aluminum, wherein a nickel content of the core particle is about 60 mol % to about 80 mol % and an aluminum content of the core particle is about 1 mol % to about 3 mol % based on about 100 mol % of a total metal excluding lithium, and an aluminum content of the coating layer is about 0.1 mol % to about 2 mol % based on about 100 mol % of the total metal excluding lithium.

Abstract: A wireless communication device for facilitating wireless communication is provided. The device transmits a training frame, and receives a plurality of feedback frames including channel quality information from a plurality of stations in response to the training frame. The device determines a plurality of groups based on the channel quality information in the plurality of feedback frames. Each of the plurality of groups is associated with a respective one of the plurality of stations and includes an associated station as a primary station and at least one secondary station. The device determines channel capacities of the plurality of groups and selects a group of the plurality of groups based on the channel capacities of the plurality of groups. The device determines users of the selected group as MU-MIMO users and transmits a MU PPDU in MU-MIMO for the users of the selected group.

Abstract: Disclosed is a water treatment system capable of inhibiting the occurrence of membrane fouling during water treatment at a relatively low cost without reducing water permeability of a filtration membrane. The water treatment system includes a biological treatment unit for biological treatment of wastewater and a membrane unit for filtration of the wastewater treated by the biological treatment unit, wherein at least one selected from the group consisting of the biological treatment unit and the membrane unit includes a plurality of quorum quenching media confined in a predetermined space therein.