Abstract: An embodiment of the present invention provides a camera actuator comprising: a holder disposed in a lower part; a rotation part disposed inside the holder, an optical member disposed on the rotation part; a first drive part for tilting the optical member to a first axis by pressing the rotation part; and a second drive part for tilting the optical member to a second axis by pressing the rotation part, wherein the rotation part comprises: a first rotation plate disposed on the inside; a second rotation plate disposed outside the first rotation plate; a fixing plate disposed outside the second rotation plate; a first bridge disposed between the first rotation plate and the second rotation plate so as to be positioned corresponding to the first axis; and a second bridge disposed between the second rotation plate and the fixing plate so as to be positioned corresponding to the second axis.

Abstract: A camera actuator according to an embodiment includes a housing; a prism unit disposed in the housing; a first driving unit disposed in the housing and controlling a tilt of the prism unit; and a second driving unit disposed under the housing and controlling a tilt of the housing, wherein the first driving unit includes a first piezoelectric device disposed in a region overlapping a center of the prism unit in a first direction, wherein the second driving unit includes a second piezoelectric device disposed in a region overlapping the center of the prism unit in a second direction different from the first direction, wherein the prism unit is provided to be tiltable in the second direction by the first driving unit, and wherein the housing is provided to be tiltable in the first direction by the second driving unit.

Abstract: This application relates to a cement mortar composition reinforced with a shredded waste fishing net and a method of manufacturing the cement mortar composition. In one aspect, the cement mortar composition includes cement mortar including cement, fine aggregate, and water and 0.5 to 2.0 parts by weight of a fibrous reinforcing material based on 100 parts by weight of the cement mortar. The fibrous reinforcing material may be manufactured by shredding a knotless fishing net and being formed of a single yarn that has a length of 3 mm to 60 mm and a diameter of 0.1 mm to 1 mm. The cement mortar composition that has improved crack resistance and tensile strength and in which an environmentally friendly and inexpensive reinforcing material obtained by shredding a waste fishing net at a random length instead of existing highly-expensive reinforcing material is included may be realized.

Abstract: An apparatus and method for measuring a tactile information, using a material having variable pressure dependent properties is disclosed. The apparatus for measuring the tactile information may include a plurality of pressure measurement units to measure a magnitude of an external pressure using a material having variable properties, and a tactile information measurement unit to measure a three-dimensional (3D) tactile information based on the external pressure using a location of the plurality of pressure measurement units and a pressure measured by the plurality of pressure measurement units.

Abstract: An apparatus and method for measuring a tactile information, using a material having variable pressure dependent properties is disclosed. The apparatus for measuring the tactile information may include a plurality of pressure measurement units to measure a magnitude of an external pressure using a material having variable properties, and a tactile information measurement unit to measure a three-dimensional (3D) tactile information based on the external pressure using a location of the plurality of pressure measurement units and a pressure measured by the plurality of pressure measurement units.

Abstract: A flexible tactile sensor apparatus is provided. The flexible tactile sensor apparatus may obtain information about an applied force, using a resistance between an upper nano wire array of an upper plate and a lower nano wire array of a lower plate, which may be changed based on a distance, between the upper nano wire array and the lower nano wire array, adjusted in proportion to the force.