Abstract: Disclosed is a metaverse platform operating method and system for implementing a virtual universe space. The metaverse platform operating method includes: obtaining a plurality of satellite data from a satellite vehicle on a predetermined period for a predetermined time; constructing space situational awareness (SSA) information associated with the satellite vehicle by processing the plurality of satellite data; generating a metaverse-based virtual universe space in which the satellite vehicle is positioned for the predetermined time, through three-dimensional (3D) modeling of the SSA information; at an access request from a device, identifying a satellite-related organization to which the device belongs, using a login account included in the access request; and visualizing the metaverse-based virtual universe space on the device according to an information access right of the satellite-related organization.

Abstract: A space digital twin device and a space digital twin method are disclosed. The space digital twin device includes a digital twin unit configured to simulate a space system as a twin space system, a digital control unit configured to transplant control for the space system to control for the twin space system, and a digital output unit configured to visualize a content generated according to the control for the twin space system.

Abstract: A semiconductor device includes first active patterns on a PMOSFET section of a logic cell region of a substrate, second active patterns on an NMOSFET section of the logic cell region, third active patterns on a memory cell region of the substrate, fourth active patterns between the third active patterns, and a device isolation layer that fills a plurality of first trenches and a plurality of second trenches. Each of the first trenches is interposed between the first active patterns and between the second active patterns. Each of the second trenches is interposed between the fourth active patterns and between the third and fourth active patterns. Each of the third and fourth active patterns includes first and second semiconductor patterns that are vertically spaced apart from each other. Depths of the second trenches are greater than depths of the first trenches.

Abstract: Provided are a packet transmission scheduling method in a wireless network and a packet transmission method using the same. The packet transmission scheduling method, includes storing location information and a path loss exponent of each node on a multiplexing path; calculating a Signal-to-Interference and Noise Ratio (SINR) between nodes on a predetermined path based on the stored location information; when the calculated SINR exceeds a threshold, forming the paths as a path table; and scheduling packet transmission based on the formed path table.

Abstract: Provided are a packet transmission scheduling method in a wireless network and a packet transmission method using the same. The packet transmission scheduling method, includes storing location information and a path loss exponent of each node on a multiplexing path; calculating a Signal-to-Interference and Noise Ratio (SINR) between nodes on a predetermined path based on the stored location information; when the calculated SINR exceeds a threshold, forming the paths as a path table; and scheduling packet transmission based on the formed path table.