Abstract: The present invention discloses a detachable grinding disk for an electric grinder with high adhesion efficiency, the detachable grinding disk comprising: a plate part made of a circular metal plate; a sanding part on which a grinding member is formed so that one side of the plate part has a grinding surface; and a fastening part provided in a form of a through hole at a position of a central axis of the plate part to be easily fastened to the electric grinder, wherein the plate part is formed to have a gradual curvature in such a way that a convex surface of the gradual curvature is formed toward the sanding part, thereby enabling the detachable grinding disk to be attached to the electric grinder closely, elastically, and preventing overturning during high-speed rotation.

Abstract: A method and a device for performing sensing measurement in a wireless LAN system are disclosed. In an embodiment of the present disclosure, a method for performing sensing measurement by an STA in a wireless LAN system may comprise the steps of: receiving, from a second STA, a sensing measurement element including first information indicating at least one of a TB measurement instance and a non-TB measurement instance; and performing the sensing measurement in at least one of the TB measurement instance and the non-TB measurement instance, wherein the sensing measurement element includes at least one of a parameter set for the TB measurement instance and a parameter set for the non-TB measurement instance on the basis of the first information.

Abstract: The present specification proposes an improved recommendation for TWT operation supported in a next-generation wireless LAN system. According to one embodiment of the present specification, an improved recommendation for constrained TWT operation is defined. According to another embodiment of the present specification, whether an STA performs an NAV protection mechanism can be determined according to the value of a broadcast TWT proposal subfield.

Abstract: The present specification proposes a method for resuming a PHY-level HARQ operation in a wireless local area network (WLAN) system. The method may include transmitting a resume signal including information related to resumption of hybrid automatic repeat request (HARQ) retransmission. The method may include transmitting a physical protocol data unit (PPDU) after transmitting the resume signal. The PPDU and the resume signal may be transmitted in different transmission opportunities (TXOPs).

Abstract: A battery cell includes a cathode element, an anode element, and an electrolyte disposed in contact with each of the cathode and anode elements. The battery cell also includes a battery cell case constructed from a rigid material and defining an internal chamber configured to house each of the cathode element, the anode element, and the electrolyte. The battery cell case defines at least one aperture configured to provide a gas path between the internal chamber and an external environment. The battery cell additionally includes a reversible, multiple-use valve assembly mounted to the battery cell case and configured to selectively open a fluid flow through the at least one aperture to relieve a gas pressure within the internal chamber exceeding a predetermined pressure threshold.

Abstract: A method is performed by an augmented reality (AR) device. The method includes identifying a device of interest; determining whether to display information about the device of interest and displaying an AR image corresponding to the information about the device of interest.

Abstract: Provided are a method and apparatus for requesting complete information or partial information on access points (APs) in a transmitting multi-link device (MLD) in a wireless local area network (WLAN) system. Specifically, a receiving MLD transmits a probe request frame to the transmitting MLD through a first link. The receiving MLD receives a probe response frame from the transmitting MLD through the first link. The transmitting MLD includes a first transmitting station (STA) operating in the first link and a second transmitting STA operating in a second link. The receiving MLD includes a first receiving STA operating in the first link and a second receiving STA operating in the second link. The probe request frame includes a profile field of the second receiving STA.

Abstract: Proposed are a method and device for acquiring information on links between MLDs in a wireless LAN system. Specifically, a receiving MLD transmits a probe request frame to a transmitting MLD through a first link. The receiving MLD receives a probe response frame from the transmitting MLD through the first link. The transmitting MLD comprises: a first transmitting STA operating in the first link; a second transmitting STA operating in a second link; and a third transmitting STA operating in a third link. The receiving MLD comprises a first receiving STA operating in the first link. When the first receiving STA requests for information on the second and third links, the probe request frame includes link identifiers for the second and third links. When the first receiving STA requests for information on all the links, the probe request frame does not include link identifiers for all the links.

Abstract: Provided are a compound, an infrared sensor, a combination sensor, and an electronic device. The compound is represented by Chemical Formula 1. The infrared sensor includes a first electrode and a second electrode facing each other, and an infrared photoelectric conversion layer between the first electrode and the second electrode, wherein the infrared photoelectric conversion layer includes the compound represented by Chemical Formula 1. In Chemical Formula 1, the definition of each substituent is as described in the detailed description.

Abstract: A method and a device for performing a sensing procedure in a WLAN system are disclosed. A method of performing a sensing procedure by a first STA in a wireless LAN system comprises the steps of: receiving, from an AP, a first polling frame including first information related to participation in a first type of measurement for the first STA; transmitting, to the AP, a first response frame for the first polling frame; and receiving, from the AP, a second polling frame including the first information, on the basis of a second response frame not being transmitted to the AP from a second STA from among a plurality of STAs including the first STA, wherein the first polling frame may include second information related to participation in a second type of measurement for the second STA, and the second polling frame may not include the second information.

Abstract: In a wireless local area network system, a station (STA) generates a physical (PHY) protocol data unit (PPDU) including at least one subframe and information related to a subframe length, wherein the subframe may include a medium access control (MAC) protocol data unit (MPDU) and a padding bit. The length of the padding bit may be determined such that the length of the subframes is an integer multiple of a codeword length. The information related to the subframe length may be information on the number of codewords related to the subframe length. A step in which the STA transmits the PPDU may be comprised.

Abstract: The present specification defines a link adaptation control subfield applicable to a next-generation wireless LAN system including an EHT specification. According to an embodiment described in the present specification, the link adaptation control subfield may include a PS160 subfield. According to another embodiment described in the present specification, the link adaptation control subfield may include a 1-bit MRQ/uplink TB PPDU MFB subfield.

Abstract: Proposed are a method and apparatus for performing sensing in a wireless LAN system. In detail, a first STA broadcasts a sensing request frame. The first STA receives a first sensing response frame form a second STA and receives a second sensing response frame from a third STA. The sensing request frame includes STA identifier information and RU allocation information. The STA identifier information includes identifiers of the second and third STAs. The RU allocation information includes information about a first RU allocated to the second STA and information about a second RU allocated to the third STA. The first sensing response frame is received through the first RU. The second sensing response frame is received through the second RU.

Abstract: A compound is represented by Chemical Formula 1. In Chemical Formula 1, R1 to R4, R11a to R14c, and n are the same as defined in the detailed description.

Abstract: Proposed are a method and a device for transmitting an NGV frame in a wireless LAN system. Specifically, a transmission device generates an NGV frame and transmits same via a first band. The NGV frame includes an L-STF, L-LTF, L-SIG, RL-SIG, NGV-SIG, NGV-STF, NGV-LTF and NGV-Data. The NGV-Data includes at least one midamble. The at least one midamble is generated on the basis of a sequence of the NGV-LTF. The sequence of the NGV-LTF includes two time sequences which, in a frequency domain, are mapped to a tone including two tone units, and in a time domain, are repeated in a single OFDM symbol. The at least one midamble includes one or two OFDM symbols.

Abstract: A method and a device for performing communication in a wireless LAN system are disclosed. A method by which a first station (STA) performs communication in a wireless LAN system may comprise the steps of: receiving, from an access point (AP), first information related to a restricted target wake time (r-TWT); receiving, from the AP, second information related to the extension of the end time of a service period (SP) of the r-TWT; and transmitting, to the AP, third information indicating whether to maintain an awake state until the end time of the extended SP.

Abstract: Disclosed are a method and device for communicating in a wireless LAN system. A method for a first station (STA) to communicate in a wireless LAN system comprises the steps of: transmitting, to a plurality of STAs, a first frame for forming a group that is to perform a sensing operation; transmitting a second frame, including information related to a sensing session, to at least one STA that has transmitted a first response frame to the first frame among the plurality of STAs; performing a first sensing operation with the at least one STA in a first sensing burst in the sensing session; and performing a second sensing operation with the at least one STA in a second sensing burst, following the first sensing burst, in the sensing session.

Abstract: Disclosed are a method and an apparatus for transmitting and receiving protocol data unit (PDU)-related information in a wireless LAN system. The method by which a first station (STA) transmits an aggregate-medium access control (MAC) protocol data unit (PDU) (A-MPDU) in a wireless LAN system, according to an embodiment of the present disclosure, may comprise the steps of: receiving, from a second STA, one or more of first information, second information, and third information related to the maximum length for the A-MPDU; and transmitting, to the second STA, an A-MPDU having a length less than or equal to the maximum length for the A-MPDU, which is derived from a first type physical layer PDU (PPDU) on the basis of the first information, the second information, and the third information.

Abstract: Disclosed are a method and apparatus related to a service period (SP)-based sensing procedure in a wireless LAN system. A method by which a first station (STA) performs a sensing procedure in a wireless LAN system, according to one embodiment of the present disclosure, may comprise the steps of: receiving, from a second STA, a target wake time (TWT) element including information indicating one or more SPs related to sensing; and performing a sensing operation on the basis of the one or more SPs.

Abstract: The present disclosure relates to a novel transition metal compound represented by the following Chemical Formula 1, which exhibits excellent catalytic activity for propylene polymerization, and is useful in the preparation of a polypropylene having a narrow molecular weight distribution and a high melting point, a catalyst composition including the same, and a method for preparing a polypropylene using the same, wherein M, X1, X2, and R1 to R8 are described herein.