Abstract: A wafer processing apparatus is provided. The apparatus includes: a heating plate through which vacuum ports are formed; a plurality of temperature sensors; a heating device configured to heat the heating plate; first and second power supplies; temperature controllers to generate first and second feedback temperature control signals for controlling power output power supplies based on measurement values generated by the temperature sensors; an electronic pressure regulator configured to provide vacuum pressure for fixing a wafer to the plurality of vacuum ports; and a wafer chucking controller configured to control the electronic pressure regulator, and generate a feedback pressure control signal for controlling the electronic pressure regulator based on the first and second feedback temperature control signals.

Abstract: A wafer processing apparatus is provided. The apparatus includes: a heating plate through which vacuum ports are formed; a plurality of temperature sensors; a heating device configured to heat the heating plate; first and second power supplies; temperature controllers to generate first and second feedback temperature control signals for controlling power output power supplies based on measurement values generated by the temperature sensors; an electronic pressure regulator configured to provide vacuum pressure for fixing a wafer to the plurality of vacuum ports; and a wafer chucking controller configured to control the electronic pressure regulator, and generate a feedback pressure control signal for controlling the electronic pressure regulator based on the first and second feedback temperature control signals.

Abstract: Context-aware system, method, and computer-readable recording medium for providing an intelligent service in an Internet of Things (IoT) environment are provided. The context-aware system includes a plurality of IoT devices, each including at least one sensor and a communication unit, a gateway connected to the plurality of IoT devices and including at least one gateway device connected to an Internet network, and a cloud server layer which transmits and receives data to and from the plurality of IoT devices through the Internet network and the gateway, wherein at least one IoT device, which cannot perform a context-aware processing process in real time, generates context information, and transmits it to a context-aware server of the cloud server layer. The context-aware server performs the context-aware processing process of the IoT device to generate context-aware result information, and transmits the result information back to the IoT device.

Abstract: A method for forming a dynamic bridge node of a wireless mesh network is provided. The method includes enabling a bridge mode of at least one of the mesh nodes in correspondence to a mutual coverage, when a signal corresponding to a connection source is received from the external network, transmitting, by the mesh node having the enabled bridge mode, rank information for connection to the external network with reference to a distance to the connection source and the mesh node's own traffic, comparing rank information received from a neighboring mesh node having an enabled bridge mode with the mesh node's own rank information, and generating an order of priority for connection to the external network. The mesh node with the highest order of priority operates as a bridge node for connection of the external network and the wireless mesh network.

Abstract: A hierarchical graph-based path search method includes: a first graph abstraction step of configuring a target space by a grid map and dividing the target space into regions to set a start vertex and a target vertex, and generating a first abstract graph by defining each vertex of the divided regions as a basic hub; a second graph abstraction step of defining vertices having a high degree centrality among vertices of each region of the first abstract graph as second basic hubs and generating a second abstract graph by connecting the second basic hubs; a graph search step of searching a shortest path between the start vertex and the target vertex in the second abstract graph; and a materialization step of projecting and materializing the path discovered in the graph search step onto the grid map.

Abstract: A method for forming a dynamic bridge node of a wireless mesh network is provided. The method includes enabling a bridge mode of at least one of the mesh nodes in correspondence to a mutual coverage, when a signal corresponding to a connection source is received from the external network, transmitting, by the mesh node having the enabled bridge mode, rank information for connection to the external network with reference to a distance to the connection source and the mesh node's own traffic, comparing rank information received from a neighboring mesh node having an enabled bridge mode with the mesh node's own rank information, and generating an order of priority for connection to the external network. The mesh node with the highest order of priority operates as a bridge node for connection of the external network and the wireless mesh network.

Abstract: Context-aware system, method, and computer-readable recording medium for providing an intelligent service in an Internet of Things (IoT) environment are provided. The context-aware system includes a plurality of IoT devices, each including at least one sensor and a communication unit, a gateway connected to the plurality of IoT devices and including at least one gateway device connected to an Internet network, and a cloud server layer which transmits and receives data to and from the plurality of IoT devices through the Internet network and the gateway, wherein at least one IoT device, which cannot perform a context-aware processing process in real time, generates context information, and transmits it to a context-aware server of the cloud server layer. The context-aware server performs the context-aware processing process of the IoT device to generate context-aware result information, and transmits the result information back to the IoT device.

Abstract: An LED illumination system includes a plurality of LED lamps. Each of the LED lamps includes: an LED array including one or more LED elements that interoperate with input power and emit light; a power management unit that controls supplied power so that power is input to the LED array; a control unit that controls the power management unit to control an operation of the LED array in response to a signal input set by a user through a user terminal; and a wireless communication module that transmits a received wireless communication signal to the control unit and transmits information received from the control unit in the form of a wireless communication signal.

Abstract: An LED illumination system includes a plurality of LED lamps. Each of the LED lamps includes: an LED array including one or more LED elements that interoperate with input power and emit light; a power management unit that controls supplied power so that power is input to the LED array; a control unit that controls the power management unit to control an operation of the LED array in response to a signal input set by a user through a user terminal; and a wireless communication module that transmits a received wireless communication signal to the control unit and transmits information received from the control unit in the form of a wireless communication signal.