Abstract: A processor of a wearable device is provided. The processor may identify an external object included in a displaying area of a display by using a camera. The processor may display a first visual object representing an application corresponding to the external object based on the location of the external object in the displaying area. The processor may obtain at least one of first information associated with a path of the external object moved on the plane, or second information including at least one stroke drawn by the external object, while the first visual object is displayed. The processor may display a second visual object for executing the application by using information, selected among the first information or the second information, based on the location, according to the attribute assigned to the external object.

Abstract: Disclosed is a printed circuit board (PCB) structure, in which an electromagnetic signal transmitting antenna and/or an electromagnetic signal receiving antenna, and an electromagnetic signal transferring tunnel (EM-tunnel) are embedded, the PCB structure including a PCB, an EM-tunnel that includes a dielectric core and a metal clad that surrounds the dielectric core and that is embedded in the PCB to be parallel to the PCB, and at least one transmitting antenna and/or at least one receiving antenna that are embedded in the PCB, wherein the transmitting antenna and/or the receiving antenna are arranged at an input port and an output port of the EM-tunnel embedded in the PCB to transmit and receive electromagnetic signals to and from the interior of the EM-tunnel.