Abstract: A positive electrode active material precursor includes Ni and Mn and secondary particles formed by the aggregation of a plurality of primary particles. The secondary particles have a ratio of a core area to a total area of the particles ranging from 28.7% to 34.1%, and a porosity ranging from 11.3% to 11.7%. Also provided is a method for preparing the positive electrode active material precursor. Additionally, a positive electrode active material including a reaction product of the positive electrode active material precursor and a lithium raw material is provided. Also provided is a method for preparing a positive electrode active material using the positive electrode active material precursor.

Abstract: There is disclosed a website management device including a memory that stores an administrator DID and an administrator private key, a communication interface that communicates with a blockchain network, and at least one processor, and the at least one processor submits a first transaction for creating a URI authentication document to the blockchain network, the first transaction including an administrator digital signature created based on the administrator private key, the first URI, and an access rule for data included in the first URI, and retrieves a remittance transaction having a blockchain account on the blockchain network corresponding to the administrator DID as a recipient, the remittance transaction including a fee statement prepared based on the access rule included in the first URI authentication document. In addition to the above, various embodiments identified through the specification are possible.

Abstract: An antenna system is provided. The antenna system includes an antenna connected to a signal transmitting/receiving circuit to transmit and receive a radio signal, an antenna pole coupled to the antenna, a central weight unit coupled to the antenna pole to keep a beam pattern of the antenna in a certain direction with respect to a gravity direction and formed in a curved figure, and an antenna coupling unit formed in a recess to support the central weight unit.

Abstract: An apparatus and method are provided for transmitting data by a Customer Premises Equipment (CPE) that communicates with a first communication equipment supporting a first communication protocol and a second communication equipment supporting a second communication protocol. The apparatus and method includes receiving data packets from the second communication equipment, determining a data grant interval of the first communication equipment according to a preset Quality of Service (QoS) scheme of the first communication equipment, determining an amount of data to be transmitted for the data grant interval, collecting data packets from the received data packets below the determined amount of transmission data, and transmitting the collected data packets to the first communication equipment every data grant interval.

Abstract: An apparatus and method are provided for transmitting data by a Customer Premises Equipment (CPE) that communicates with a first communication equipment supporting a first communication protocol and a second communication equipment supporting a second communication protocol. The apparatus and method includes receiving data packets from the second communication equipment, determining a data grant interval of the first communication equipment according to a preset Quality of Service (QoS) scheme of the first communication equipment, determining an amount of data to be transmitted for the data grant interval, collecting data packets from the received data packets below the determined amount of transmission data, and transmitting the collected data packets to the first communication equipment every data grant interval.

Abstract: An antenna system is provided. The antenna system includes an antenna connected to a signal transmitting/receiving circuit to transmit and receive a radio signal, an antenna pole coupled to the antenna, a central weight unit coupled to the antenna pole to keep a beam pattern of the antenna in a certain direction with respect to a gravity direction and formed in a curved figure, and an antenna coupling unit formed in a recess to support the central weight unit.