Abstract: A variable resistance memory device includes a first conductive line, a bipolar selection device on the first conductive line and electrically connected to the first conductive line, a second conductive line on the first conductive line and electrically connected to the bipolar selection device, a variable resistance layer on the second conductive line and electrically connected to the second conductive line, and a third conductive line on the variable resistance layer and electrically connected to the variable resistance layer.

Abstract: Magnetic memory devices may include a substrate, a metal pattern extending in a first direction on the substrate, a magnetic tunnel junction pattern on the metal pattern, and an anti-oxidation layer between the metal pattern and the magnetic tunnel junction pattern. The magnetic tunnel junction pattern may include a first magnetic pattern, a tunnel barrier pattern, and a second magnetic pattern.

Abstract: An embodiment of the present disclosure discloses a computer program executable by one or more processors and stored in a computer readable medium. The computer program causes the one or more processors to perform operations for database management, the operations including: generating a sorted table by sorting a table including one or more records based on at least one column; identifying a current key corresponding to each of one or more rows included in the sorted table; sequentially recording a record corresponding to each of the one or more rows in a data structure based on a result of a comparison between the current key corresponding to each of the one or more rows and a previous key; and generating an integrated result value for a record recorded in the data structure and recording the generated integrated result value in an output table.

Abstract: A transmission of a sounding reference signal by an electronic device is provided. A method of an electronic device includes transmitting a signal via a first antenna subset including at least one of a plurality of antennas, measuring an emission environment of the plurality of antennas, using the signal, determining at least one antenna to be used for transmitting a sounding reference signal (SRS), based on the emission environment, and transmitting the SRS via the at least one determined antenna. The emission environment includes a strength of a reflected signal that corresponds to the signal and is reflected by the first antenna subset, or a strength of a reception signal that corresponds to the signal and is received by a second antenna subset including at least one remaining antenna.