Abstract: Disclosed is a method of manufacturing a polyurethane filter foam having excellent air permeability, elasticity, and restoring force. In the method of manufacturing the polyurethane filter foam, the cell size of the filter foam is made regular by controlling the pressure by adjusting the diameter of the foaming head of a foaming machine, rather than adding a cell opener, cell irregularity caused by poor dispersion of the cell opener is alleviated, and air permeability, porosity, and compression set are excellent.

Abstract: According to an example embodiment of the present disclosure, an electronic device includes a motor, a flexible display disposed to be changed in a size to which the flexible display is exposed to one side in accordance with an operation of the motor, a processor configured to control the display and the motor, and the processor may identify event information associated with a change in a size of an exposed display, identify an operation pattern of the motor based on the event information, and change the size of the exposed display based on the identified operation pattern.

Abstract: A method for authenticating a user of a portable computing device according to an embodiment of the present disclosure includes identifying an application executed on the portable computing device, collecting touch data on the portable computing device and/or motion data of the portable computing device during execution of the application, and determining whether the pattern of the collected touch data and/or motion data corresponds to a usage pattern profile associated with the identified application. Whether the pattern of the touch data and/or the motion data corresponds to the usage pattern profile is determined in a Machine Learning or Deep Learning manner using an artificial neural network trained to output the corresponding degree between the usage pattern profile and the input data. According to the present disclosure, it is possible to authenticate the user in real time without disturbing the user during the use of the portable computing device.