Abstract: Provided are a system and method for a video call. The system for a video call includes one or more terminals configured to transmit images obtained by capturing video call users, and a video call control server configured to generate a combined image by combining the images transmitted by the one or more terminals, and transmit the combined image to the terminals. Here, the respective images are rotated according to information on postures sensed by the terminals and combined into the combined image.

Abstract: An optoelectric control apparatus for a satellite laser ranging system comprises a communication controller for externally receiving optoelectric control data. Memory is connected to the communication controller and stores a round trip distance to a satellite. A laser generation control unit is connected to the communication controller and outputs a laser fire signal. A signal measurement unit receives a laser start time. A real-time conversion unit is connected to the signal measurement unit and the communication controller, and converts a predicted laser arrival time into real time. A Lagrange interpolation processor is connected to the real-time conversion unit and the memory, and calculates a time at which laser light fired by a laser transmission unit returns back to a laser reception unit (laser arrival time). The clock unit is connected to a time measurement unit, the real-time conversion unit, a register unit, and a delay unit, and outputs time information.

Abstract: A variable stiffness film, a variable stiffness flexible display, and a manufacturing method thereof may include a lower electrode, a variable fluid, and an upper electrode. A polymer layer may be formed on the lower electrode, and a variable fluid receiving portion is patterned on the polymer layer. A variable stiffness layer is formed by putting a variable fluid in the variable fluid receiving portion. The upper electrode is formed on the variable fluid layer.

Abstract: Disclosed herein is an eyebrow coil jacket, a heat control apparatus of a reactor using the eyebrow coil jacket, and a method for manufacturing the heat control apparatus of the reactor. According to the present invention, it is possible to provide an eyebrow coil jacket that is capable of increasing the heat control area of the reactor even when applied to a large-sized reactor so that a heat control amount of the heat control apparatus is improved 20% more than when a half pipe coil is used, a heat control apparatus of a reactor using the eyebrow coil jacket, and a method for manufacturing the heat control apparatus of the reactor.

Abstract: Provided is a method of manufacturing a gradually stretchable substrate. The method includes forming convex regions and concave regions on a top surface of a stretchable substrate by compressing a mold onto the stretchable substrate and forming non-stretchable patterns by filling the concave regions of the stretchable substrate. The stretchable substrate includes a stretchable region defined by the non-stretchable patterns, the non-stretchable patterns have side surfaces in contact with the stretchable region, and the side surfaces of the non-stretchable patterns are formed of protrusions and a non-protrusion between the protrusions repetitively connected to one another.

Abstract: A method for controlling a mobile terminal that includes receiving, at the mobile terminal, a security level of a defined location. The security level is set based on at least one of gate access information indicating a user of the mobile terminal is entering or exiting a gate, global positioning system (GPS) information of the mobile terminal, or an identifier (ID) of a wireless network apparatus scanned by the mobile terminal. The method further includes obtaining location information of the mobile terminal from a source that is determined according to the security level, identifying location of the mobile terminal based on the obtained location information, and applying a security policy to the mobile terminal based on the security level when the identified location corresponds to the defined location.

Abstract: A light emitting diode is disclosed. The disclosed light emitting diode includes a light emitting structure including a first-conductivity-type semiconductor layer, an active layer, and a second-conductivity-type semiconductor layer. The first-conductivity-type semiconductor layer, active layer, and second-conductivity-type semiconductor layer are disposed to be adjacent to one another in a same direction. The active layer includes well and barrier layers alternately stacked at least one time. The well layer has a narrower energy bandgap than the barrier layer. The light emitting diode also includes a mask layer disposed in the first-conductivity-type semiconductor layer, a first electrode disposed on the first-conductivity-type semiconductor layer, and a second electrode disposed on the second-conductivity-type semiconductor layer. The first-conductivity-type semiconductor layer is formed with at least one recess portion.

Abstract: The light emitting device includes a first conductive type semiconductor layer (112), an active layer (114) including a quantum well (114w) and a quantum wall (114b) on the first conductive type semiconductor layer (112), an undoped last barrier layer (127) on the active layer (114). An AlxInyGa(1-x-y)N (0?x?1, 0?y?1)-based layer (128) is provided on the undoped last barrier layer (127) and a second conductive type semiconductor layer (116) is provided on the AlxInyGa(1-x-y)N-based layer (128).

Abstract: Provided is a method for manufacturing a stretchable thin film transistor. The method for manufacturing a stretchable thin film transistor includes forming a mold substrate, forming a stretchable insulator on the mold substrate, forming a flat substrate on the stretchable insulator, removing the mold substrate, forming discontinuous and corrugated wires on the stretchable insulator, forming a thin film transistor connected between the wires, and removing the flat substrate.

Abstract: A light emitting device includes a first conductive semiconductor layer (112), an active layer (114) including a quantum well (114w) and a quantum barrier (114b) on the first conductive semiconductor layer (112). An undoped last barrier layer (127) is provided on the active layer (114), and an AlxInyGa(1-x-y)N (0?x?1, 0?y?1)-based layer (128) is provided on the undoped last barrier layer (127). A second conductive semiconductor layer (116) is provided on the AlxInyGa(1-x-y)N-based layer (128).

Abstract: An apparatus and method for measuring bending of an object, a position of an item touching the object, and a shearing force of the item using an optical waveguide may include a frequency measurer to measure a frequency of light reflected from a grating of an optical waveguide, and a bending measurer to determine bending of an object to which the optical waveguide is attached using the frequency.

Abstract: In a wafer dicing press for reducing time and cost for wafer dicing and for evenly applying a dicing pressure to a whole wafer, a wafer dicing press includes a support unit supporting a first side of a wafer; and a pressurization device applying a pressure, by dispersing the pressure, to a second side of the wafer so that a laser-scribed layer of the wafer operates as a division starting point. Accordingly, the wafer dicing press reduces laser radiation and pressure-application times for dividing a wafer into semiconductor devices. This increased efficiency is achieved without increasing the likelihood of damaging the wafer.

Abstract: Provided are a stretchable electric circuit and a manufacturing method thereof The method for manufacturing the stretchable electric circuit includes forming a mold substrate, forming a stretchable substrate having a first flat surface and a first corrugated surface outside the first flat surface on the mold substrate, removing the mold substrate, forming a corrugated wire on the first corrugated surface, and forming an electric device connected to the corrugated wire on the first flat surface.

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 tactile sensation providing apparatus includes a tactile output unit configured to contact a part of a human body; a connection unit including a wire connected to the tactile output unit and made of a flexible and elastic material, and a tube enclosing the wire; and a driving unit to supply a driving force to the connection unit.

Abstract: A method for fabricating a display device is provided. A laser having a power density is provided to a substrate coupling body. The substrate coupling body includes a first substrate and a second substrate coupled to the first substrate. The second substrate is separated from the first substrate. An optical property of the first substrate separated from the second substrate is measured. The power density of the laser is adjusted based on the optical property of the first substrate.

Abstract: Provided is a surface heater using a strip type surface heating element and a fabricating method thereof, in which the surface heater can be embodied into a thin film form using a metallic surface heating element which has a specific resistance value appropriate as a heat wire and is formed of a strip style, where the strip type surface heating element can be sequentially produced at an inexpensive cost. The surface heater includes: the strip type surface heating element in which a number of strips which are obtained by slitting a metallic thin film are arranged with an interval in parallel with each other and both ends of each adjacent strip are connected with each other; and an insulation layer which is coated on the outer circumference of the strip type surface heating element in a plate form.

Abstract: Provided is an electronic circuit. The electronic circuit includes: a substrate including a device region and a wiring region; an electronic device disposed on the device region; and a conductive wire disposed on the wiring region and connected to the electronic device, wherein the substrate has a first side where the electronic device and the conductive wire contact and a second side facing the first side; the first side and the second side of the wiring region have a convex structure; the first side of the device region is flat; and the device region is thicker than the wiring region.

Abstract: An organic light emitting diode display device is disclosed. The organic light emitting diode display device includes an organic light emitting diode array formed on a flexible substrate, a cover film formed to cover the organic light emitting diode array, and a bottom film attached to a lower surface of the flexible substrate. Reliability of the organic light emitting diode display device may be improved by forming a cover film attached to the organic light emitting diode array and a bottom film attached to the lower surface of the flexible substrate on which the organic light emitting diode array is formed using the same material, and forming a moisture absorbent on the bottom film.

Abstract: According to example embodiments of the inventive concept, provided is a transistor with a nano-layered oxide semiconductor layer. The oxide semiconductor layer may include at least one first nano layer and at least one second nano layer that are alternatingly stacked one on another. Here, the first nano layer and the second nano layer may include different materials from each other, and thus, a channel with high electron mobility may be formed at the interface between the first and second nano layers. Accordingly, the transistor can have high reliability.