Abstract: An electrical discharge machining device for processing a workpiece by electrical discharges generated between a tool and the workpiece is provided. The electrical discharge machining device includes an electric discharger applying electric power to the tool and the workpiece to process the workpiece, and a vibration generator applying a vibration to the tool or the workpiece using a first voltage generated between the tool and the workpiece during a time when the workpiece is processed.

Abstract: Provided is a method and apparatus of dynamic loading file extraction. The method for extracting a specific dynamic generated file of an application running in an Android container environment includes conducting first analysis to identify if a file extension that is stored in the Android container corresponds to a preset critical extension, to extract a file with the critical extension, and conducting second analysis to identify a deleted file standing for a file deleted after stored in the Android container, and running the application again and extracting the deleted file based on a result of the second analysis.

Abstract: A method for object position estimation based on a magnetic field using an underwater sensor network, includes: step of receiving a magnetic field signal that is emitted from an underwater moving object using an underwater sensor network which is configured with a plurality of magnetic field sensors in the water; step of extracting an induced magnetic field signal by removing a geomagnetic field and a noise signal from the received magnetic field signal; step of determining whether or not the moving object enters the underwater sensor network using the induced magnetic field signal; and step of estimating a position of the object using position information of the plurality of sensors that sense the object if it is determined that the object enters the underwater sensor network.

Abstract: An Android dynamic loading file extraction method includes checking if at least one call of DexClassLoader, BaseDexClassLoader, PathClassLoader and openDexFile is made to a decompile code of Android Application Package (APK), hooking a dynamic loading method created in dynamic loading mechanism when the at least one call is made, extracting a dex path from the dynamic loading method, identifying if a File.delete method is invoked when the dex path is extracted, hooking the File.delete method when the File.delete method is invoked, extracting a path of the File.delete method and identifying if the path of the File.delete method is matched with the dex path, and extracting a dex file or jar file from the decompile code of APK when the path of the File.delete method is unmatched with the dex path. Accordingly, the dex file used in dynamic loading mechanism of the malicious application is extracted, and static analysis of the hidden codes is conducted using reverse engineering mechanism.

Abstract: A system for dynamically replicating data for a heterogeneous Hadoop is provided. The system includes a name node having a replication manager. The replication manager calculates a probability that a map task is allocated to a map task slot of a data node that stores an input data block of the map task out of a plurality of map task slots of data nodes by using a number of the map task slots in the Hadoop clusters comprised of heterogeneous clusters, and dynamically replicates data based on the probability.

Abstract: Provided is an active clamp full bridge converter, which includes: a transformer having a primary coil and a secondary coil and configured to convert a voltage; a primary circuit connected to an input capacitor for supplying an input power and including a full bridge circuit having first to fourth switches to transmit the input power to the primary coil according to a switching operation of the first to fourth switches; and a secondary circuit connected to the secondary coil and including a rectifying bridge circuit having first to fourth diodes, an active clamp circuit connected to the rectifying bridge circuit and composed of an active clamp switch and a clamping capacitor connected in series, and an output inductor connected to the active clamp circuit, to transmit an energy received from the primary circuit by the transformer to an output capacitor connected to the output inductor and the active clamp circuit.

Abstract: Provided are a mobile evolve packet core (EPC) and a paging method using the same. The mobile EPC includes: a mobile EPC server providing an environment for operating a set of virtual machines (VMs), each of the virtual machines serving as a functional entity of a core network of a mobile communication system; a transmission module transmitting/receiving between the mobile EPC server and components of the mobile communication system or between the mobile EPC server and another mobile EPC server; and a mobile means with the mobile EPC server and the transmission module and providing mobility, wherein the mobile EPC moves to a disaster area to form a public safety network (PSN).

Abstract: An unmanned aerial vehicle (UAV) is provided. The UAV includes a main body, a plurality of motors connected to the main body, each of the plurality of motors having a rotor blade, a plurality of ultrasonic sensors located at least one of the plurality of motors and the main body, and transmitting and receiving ultrasonic waves to and from a ground surface, and measuring distances from the ground surface, a gyro sensor disposed at the main body and maintaining the UAV in a horizontal state, and a controller disposed at the main body, detecting an unevenness of the ground surface based on the distances from the plurality of ultrasonic sensors to the ground surface, generating a control signal whether to land on the ground surface or not in response to the detection of the unevenness, and transmitting the control signal to the plurality of motors.

Abstract: Disclosed are a terminal discovery method in a wireless communication system supporting device-to-device (D2D) communication, and a device therefor. The method for discovering a terminal in a wireless communication system supporting device-to-device (D2D) communication, includes transmitting, by a terminal, a discovery signal, and receiving, by the terminal, a response signal as a response with respect to the discovery signal from a different terminal, wherein the response signal is transmitted by the different terminal when a response delay time determined on the basis of a reception signal-to-interference noise ratio (SINR) terminates.

Abstract: A monitoring and control system and method for a plant factory based on TV white spaces (TVWSs) are disclosed. The monitoring and control system for the plant factory includes a sensor assembly installed inside and outside a plant factory and measuring an environmental state, an actuator assembly installed inside the plant factory and creating a growing environment, and a central data processing assembly assigning a TV white space (TVWS) channel to the sensor assembly and the actuator assembly, receiving the environmental state from the sensor assembly through the TVWS channel, generating a control signal controlling the actuator assembly to meet a predetermined conditions for an internal environment of the plant factory for an optimal state of growth of crops in response to the environmental state, and transmitting the control signal to the actuator assembly through the TVWS channel.

Abstract: A 3D printer has a dual stage structure and includes: a frame; an extrusion unit having a nozzle configured to extrude a raw material; a stacking base unit positioned under the extrusion unit and configured to receive the raw material on a surface thereof so that an object is formed in a layer-by-layer manner on the surface; and a cutting unit positioned between the stacking base unit and the extrusion unit and configured to grind or cut the object formed on the surface of the stacking base unit, wherein the frame is configured to be connected to outer sides of the stacking base unit, the extrusion unit, and the cutting unit, the stacking base unit and the cutting unit are configured to be vertically movable along the frame, and the nozzle is configured to be movable on a plane.

Abstract: According to embodiments of the present invention, a method of manufacturing an organic semiconductor device includes forming a first organic semiconductor layer on a substrate, and forming a self-assembled monolayer by providing a self-assembly precursor onto the first organic semiconductor layer. The first organic semiconductor layer has a reactive group on a top surface of the first organic semiconductor layer. The forming of the self-assembled monolayer includes forming a chemical bond between the self-assembly precursor and the reactive group of the first organic semiconductor layer.

Abstract: Provided are a battery state estimation method and system and a recording medium for performing the method. The battery state estimation is provided by applying an ARX model and a dual extended Kalman filter. A battery state estimation system estimates a parameter of a battery model using an ARX model and estimates a battery state by applying the estimated parameter of the battery model to a dual extended Kalman filter including a state filter used to estimate a state of charge (SOC) and a weight filter used to estimate a state of health (SOH) of the battery.

Abstract: A touch control system for a vehicle may include a detector portion disposed on a head lining of a vehicle, and a communication module configured to receive a signal from the detector portion and transmit the signal to a device to be controlled by the signal.

Abstract: A multiple channel memory controller includes: an application adaptor that transfers a command or data received from a host to the outside, and transfers a response associated with the transferred command or data to the host; a plurality of memory adaptors that are respectively connected one-to-one to a plurality of memory devices to form corresponding physical channels; and a virtual channel controller that is located between the application adaptor and the plurality of memory adaptors, and transfers the command or data to at least one physical channel allocated to the virtual channel.

Abstract: A method for an energy-aware selective compression scheme (EASCS) for solar-powered wireless sensor networks is provided. The method includes calculating an amount of residual energy of a battery in each of sensor nodes in a wireless sensor network, selecting one operation mode between a compression mode and a latency mode in reply to the amount of the residual energy, wherein the compression mode is a mode that data is compressed and transmitted, and the latency mode is a mode that the data is transmitted without compression, and compressing and transmitting the data if the compression mode in the each of the sensor nodes is selected, or transmitting the data without compression if the latency mode in the each of the sensor nodes is selected. Accordingly, end-to-end latencies of sensor networks can be reduced while blackout times thereof do not increase by implementing energy optimization in the wireless sensor network.

Abstract: An apparatus and a method for setting a search region for the predicting of a motion vector are disclosed. The apparatus for setting a search region for predicting a motion vector includes: a computation unit configured to compute differences between an origin vector of a search region for a target block for motion vector prediction and predictive motion vectors of multiple blocks adjacent to the target block, and compute a sum of absolute values of the differences; and a search region setting unit configured to set a range value of the search region for the target block by using at least one of the sum of absolute values of the differences and a directionality of the predictive motion vectors for the multiple adjacent blocks. According to an embodiment of the present invention, the amount of computation and the time expended for computation when predicting motion vectors can be significantly reduced.

Abstract: A curling analysis method includes a step of providing a game information input interface for inputting game information in an order of progress of a curling game, a step of outputting analysis information according to the input game information based on stored accumulative curling game information, and a step of visually displaying the output analysis information. Accordingly, an interface that takes into account of convenience of a user is provided and an efficient curling analysis result is provided to assist in improvement of curling performance.

Abstract: A method of monitoring an infectious disease, a system using the same, and a recording medium for performing the same are provided. The infectious disease monitoring system includes an imaging device for capturing and transmitting image data on animals managed in a barn, a first server for determining whether a subject suspected of having an infectious disease is detected from the image data and, when the subject suspected of having the infectious disease is detected, transmitting a signal along with the image data, a second server for confirming an occurrence of the infectious disease by analyzing the image data of the subject suspected of having the infectious disease, and transmitting a warning signal when confirmed the occurrence of the infectious disease, and a manager terminal for requesting the image data on the animals to the first server upon receipt of the warning signal and displaying the image data.

Abstract: A navigation terminal includes a path controller configured to identify moving trajectories reaching respective points of interest, to cluster the identified moving trajectories into at least one moving section, to reflect a road correction mechanism in the at least one clustered moving section and to cluster the at least one clustered moving section into at least one moving path, and to extract one moving path, in which time sequential position information received from a GPS is corrected, from the at least one clustered moving path. Thereby, the navigation terminal is resistant to error of a GPS sensor, error generated due to a collection cycle, or error generated in correction, and precisely predicts a moving path.