Abstract: A mobile robot and an operating method thereof are provided. The mobile robot periodically removes foreign substances stuck on casters. To this end, while the mobile robot is traveling using a wheel module including a plurality of drive wheels and casters, a nearby mat area is detected using a sensor in response to recognition that a caster management mode has been started. After the mobile robot moves to be located on the detected mat area, the mobile robot performs predetermined motion driving to remove contaminants on the casters without departing from the mat area. This can minimize damage, such as scratches, on a floor due to foreign substances stuck on the casters while the mobile robot travels.

Abstract: Provided is an artificial muscle device, including a plurality of heat transfer modules including a thermal conductive body in which a plurality of tunnels parallel to each other and a thermoelectric element contacting an outer surface of the thermal conductive body, a connection member connecting a first heat transfer module to a second heat transfer module, the connection member being folded or unfolded according to a distance between the first heat transfer module and the second heat transfer module, a thermal reaction driving member passing through each of the tunnels, the thermal reaction driving member being stretched or contracted in a longitudinal direction of the tunnel according to a temperature of the thermal reaction driving member, and a power transmission part connected to an end of the thermal reaction driving member.

Abstract: A guide robot can include a travel part to move the guide robot, a touch screen and a camera, a sensor to detect an approach of a user, and a voice reception part to receive a voice. The guide robot further includes a controller to display at least one digital signage while the guide robot is traveling, in response to detecting the approach of the user, stop the traveling of the guide robot and transition the camera from a deactivated state to an activated state, and detect a face and a face angle of the user. Also, in response to determining that the user intends to use the guide robot, the controller can trigger a voice conversation mode by activating the voice reception part, stopping the display of the at least one digital signage and outputting usage guide information for the voice conversation mode.

Abstract: Provided is an artificial muscle device, including a plurality of heat transfer modules including a thermal conductive body in which a plurality of tunnels parallel to each other and a thermoelectric element contacting an outer surface of the thermal conductive body, a connection member connecting a first heat transfer module to a second heat transfer module, the connection member being folded or unfolded according to a distance between the first heat transfer module and the second heat transfer module, a thermal reaction driving member passing through each of the tunnels, the thermal reaction driving member being stretched or contracted in a longitudinal direction of the tunnel according to a temperature of the thermal reaction driving member, and a power transmission part connected to an end of the thermal reaction driving member.

Abstract: The embodiment relates to a quantum dot-polymer composite and a method for producing the same, wherein the quantum dot-polymer composite includes: a first phase made of a matrix resin; a second phase dispersed and distributed in the first phase, comprising a quantum dot, and having a spherical shape; and a micro scattering agent distributed in an interface between the first phase and the second phase along a surface of the second phase.

Abstract: A hybrid organic/inorganic quantum dot composite with high reliability is disclosed. The hybrid organic/inorganic quantum dot composite includes quantum dot, polymer resin, and silica, in which the silica is formed in the polymer resin, one end of the polymer resin forms a chemical bond with the quantum dot, and another end of the polymer resin includes a functional group capable of forming an additional chemical bond. The hybrid organic/inorganic quantum dot composite is resistant to moisture and oxygen permeation, and thus, it is not degraded easily by bonding oxygen and moisture to quantum dots even if moisture and oxygen permeate into the composite. The quantum dot composite may be used as a secondary raw material capable of being processed into another form while maintaining physical properties of quantum dots as a primary raw material.

Abstract: A quantum dot-polymer complex and a method for preparing the same. The quantum dot-polymer complex includes a first phase formed of a matrix resin, a globular second phase dispersed in the first phase, the second phase including a quantum dot therein, and a third phase disposed along a surface of the second phase between the first and second phases.

Abstract: A photo-conversion complex including at least one photo-conversion particle including a core nanocrystal, a shell nanocrystal surrounding the core nanocrystal, and a ligand bonded to the shell nanocrystal; and a protective film surrounding the photo-conversion particle.

Abstract: The embodiment relates to a quantum dot-polymer composite and a method for producing the same, wherein the quantum dot-polymer composite includes: a first phase made of a matrix resin; a second phase dispersed and distributed in the first phase, comprising a quantum dot, and having a spherical shape; and a micro scattering agent distributed in an interface between the first phase and the second phase along a surface of the second phase.

Abstract: A hybrid organic/inorganic quantum dot composite with high reliability is disclosed. The hybrid organic/inorganic quantum dot composite includes quantum dot, polymer resin, and silica, in which the silica is formed in the polymer resin, one end of the polymer resin forms a chemical bond with the quantum dot, and another end of the polymer resin includes a functional group capable of forming an additional chemical bond. The hybrid organic/inorganic quantum dot composite is resistant to moisture and oxygen permeation, and thus, it is not degraded easily by bonding oxygen and moisture to quantum dots even if moisture and oxygen permeate into the composite. The quantum dot composite may be used as a secondary raw material capable of being processed into another form while maintaining physical properties of quantum dots as a primary raw material.

Abstract: A photo-conversion complex including at least one photo-conversion particle including a core nanocrystal, a shell nanocrystal surrounding the core nanocrystal, and a ligand bonded to the shell nanocrystal; and a protective film surrounding the photo-conversion particle.

Abstract: A light conversion composite including a matrix resin and quantum dot-polymer beads dispersed within the matrix resin. The light conversion composite has a wave number q of 0.0056 ??1 to 0.045 ??1 at a peak point in a scattering intensity graph according to wave numbers measured by using small angle X-ray scattering.

Abstract: A quantum dot-polymer complex and a method for preparing the same. The quantum dot-polymer complex includes a first phase formed of a matrix resin, a globular second phase dispersed in the first phase, the second phase including a quantum dot therein, and a third phase disposed along a surface of the second phase between the first and second phases.

Abstract: The present invention relates to a transparent light-emitting sheet which obtains high color purity and improves light collimation to improve light efficiency, and a method of manufacturing same. The transparent light-emitting sheet according to an embodiment of the present invention includes: a transparent alumina sheet having a plurality of nanopores that are uniformly aligned; and luminescent nanoparticles that are respectively disposed within the plurality of nanopores and convert wavelengths of excitation light to generate wavelength-converted light.