Abstract: Provided is a beamforming apparatus in a receiver in a mobile communication system. The beamforming apparatus includes a Local Oscillator (LO) signal generator for generating an LO signal; a phase shifter for generating a predetermined number of phase-shifted LO signals with respect to the generated LO signal; a switching network for mapping the phase-shifted LO signals to RF signals received via a plurality of receive paths; and a mixer for mixing the RF signals with the mapped LO signals to down-convert a frequency of the RF signals.

Abstract: A multiple ROI (region of interest) setting method and apparatus in scalable video coding and an ROI reconstructing method and apparatus are provided. The multiple ROI setting apparatus includes: an ROI setting unit which sets at least one or more ROIs and allocates ROI identification numbers to the each of ROIs; a mapping unit which allocates at least one or more slice group identification numbers to the at least one or more ROI identification numbers; and a message generating unit which generates a message including ROI-associated information, slice-group-associated information, mapping information on mapping of the ROI identification number to the at least one or more slice group identification numbers, and scalability information.

Abstract: Provided is a received power conversion device for a resonant wireless charging system, including a wireless power receiver for receiving wireless power from a wireless power transmission device, a rectifier for rectifying power in an Alternating Current (AC) form received in the wireless power receiver into a Direct Current (DC), a free-wheeling switching unit for switching according to a switching control signal to form a path for free-wheeling the power in the AC form, a feedback circuit fed back with an output signal of a corresponding power conversion device to detect a level of the output signal, and a controller for controlling switching of the free-wheeling switching unit according to the output level detected by the feedback circuit.

Abstract: Disclosed a system and method for mutual authentication between a node and a sink in a sensor network. At least one sink periodically creates a neighboring sink list including information on at least one adjacent sink, and the sink requests node authentication to a base station when receiving an authentication request from the node and transmits its own neighboring sink list to the node when the node authentication has been completed. When the node moves and requests authentication to another sink, the another sink stores a neighboring sink list received from the node, determines if a node-authenticable sink exists in its own neighboring sink list according to the authentication request, and requests re-authentication of the node to the node-authenticable sink when the node-authenticable sink exists, so that re-authentication between the node and the sink is easily performed.

Abstract: A wireless power receiver for wirelessly receiving a supply of power from a wireless power supplier is disclosed. The wireless power receiver includes a power reception unit for wirelessly receiving wireless power from the wireless power supplier; a rectifier for rectifying the wireless power into power including a DC waveform; a power adjustor for configuring a closed loop with the power reception unit for a first period and transferring the wireless power to the rectifier for a second period to adjust a size of the wireless power; and a controller for determining the first period and the second period, wherein the power adjustor is electrically connected to the power reception unit and the rectifier.

Abstract: Disclosed herein is a fiber optic sensor using a transmissive grating panel and a mirror, in which displacement resulting from a temperature change in the external environment or a behavioral change in an object to be measured is measured using a transmissive grating panel, a reflection mirror and an optical fiber, and then enables various measurements to be taken of the temperature change in the external environment and the behavioral change (displacement, pressure, vibration or acceleration, etc.) in the object on the basis of the measured displacement.

Abstract: A rotational PCR apparatus, a PCR chip for the same and a rotational PCR method using the same. The rotational PCR apparatus includes: a PCR chip where PCR is performed; a rotating means connected to the PCR chip and rotating the PCR chip; and a temperature zone forming means spaced apart from the PCR chip, capable of applying thermal energy to the PCR chip and allowing the rotating PCR chip to pass through different temperature zones. The rotational PCR apparatus and method allow performance of PCR with wanted temperature condition and cycles by rotating the chip containing the target substance. Accordingly, a high-efficiency PCR process may be accomplished at low cost. Further, since the target substance can be effectively separated and purified utilizing the centrifugal force resulting from the rotating platform, separation and purification may be achieved economically without requiring additional equipments.

Abstract: An optical interconnection system is provided and includes an optical printed circuit board (PCB) that includes transmitter-unit and receiver-unit optical interconnection blocks for bending an optical path by a predetermined angle, a one-unit optical waveguide including an optical waveguide which is inserted into each of the optical interconnection blocks so as to connect optical paths of the transmitter-unit and receiver-unit optical interconnection blocks, and a PCB having the one-unit optical waveguide integrated therein; a light emitting element that is formed in-line with the optical waveguide on an upper surface of the transmitter-unit optical interconnection block exposed to an upper surface of the optical PCB; a driver integrated circuit that is formed on the upper surface of the optical PCB and electrically connected to the light emitting element and the optical PCB; a light receiving element that is formed in-line with the optical waveguide on an upper surface of the receiver-unit optical interconne

Abstract: A variable view imaging system for observation of micro object with variable view orientation and position includes a telecentric lens group, a scanning mirror, wedge prisms, a deformable mirror and related optical elements. The combination of a scanning mirror and a telecentric lens group decouples the motion of scanning mirror and the view angle. The view angle is determined only by the angle of the wedge prisms. This design increases the zenith angle of the view and simplifies the kinematics of the system. The wedge prisms and the scanning mirror can supply a flexible view in a compact way. The wavefront error induced by the wedge prisms is corrected by the deformable mirror. In order to achieve the desired view state during operation, the scanning mirror angle and the wedge prisms angle are calculated iteratively based on the kinematics and Jacobian matrix of system.

Abstract: Provided are a method, an apparatus and a system for dense graph simplification, and a recording medium for the same. The method includes receiving an original graph and extracting a plurality of salient points, which minimize a cost representing a greatest vertical distance between the original graph and each of a plurality of lines connecting two data points in a designated region on the original graph; and outputting a simplified graph in which the extracted salient points are connected. Thus, optimal results are ensured in dense graph simplification, and interactive control is allowed for a user.

Abstract: Provided are a system and a method for transmitting/receiving data in a communication system. The method includes calculating a processing matrix of a transmission unit for transmitting data, a processing matrix of a reception unit for receiving the data, a channel matrix formed by a plurality of transmission antennas and a plurality of reception antennas, and a parameter of the transmission data, when the data to be transmitted to the plurality of reception antennas via the plurality of transmission antennas is generated; determining a minimum value of a Minimum Mean Square Error (MMSE) according to the calculated matrixes and parameter; and transmitting/receiving the data using an MMSE multiplexing scheme based on the determined minimum MMSE value.

Abstract: A method for forming a moving network group by a mobile relay station (MRS) in a mobile multi-hop relay (MMR) system is provided. The MRS determines whether a transportation means mounted with the mobile relay station is at a predetermined location derived from travel information. When a velocity information of the transportation means at the predetermined location is zero (0), the MRS determines whether to include a mobile station (MS) to the moving network group based at least partly upon a signal that the mobile station receives from the mobile relay station.

Abstract: A readout integrated circuit (ROIC) for a touch screen, the readout integrated circuit includes: a touch sensor unit configured to include a plurality of touch sensors which are arranged in a matrix form having rows and columns in an inside or outside of a touch screen panel (TSP); a plurality of sensing blocks configured to sense an electrical change in each of the touch sensors, to convert the electrical change into a voltage value, and to store the voltage value; a delta circuit unit configured to receive a difference between two sensing voltage values stored in two sensing blocks, respectively, which are spaced by a predetermined distance and selected from among the plurality of sensing blocks, and to produce a delta (?) voltage; and an analog-to-digital converter configured to convert an analog signal output from the delta circuit unit into an N-bit digital signal (wherein, “N” is a natural number).

Abstract: A method of resource allocation among mobile stations in distributed communication network enables a mobile station to perceive existence of another mobile station through a time slot for resource allocation without having to communicate with a sensor node. If perceiving another mobile station, the mobile station allocates time slot resources not to overlap with the time slot resources of another mobile station, and performs location measurement or media access and reception of service from the sensor node through the allocated time slot resources. Because the mobile stations of the network can perceive each other by communicating with each other, and accordingly allocate their own resources without overlapping with the resource of the others, frequent collision of the signal for location measurement can be prevented.

Abstract: A resistive frequency mixing apparatus includes a first frequency mixer having a source follower FET, and a second frequency mixer having a common source FET. The resistive frequency mixing apparatus perform a frequency mixing of an RF depending on an LO signal to generate a down-converted IF signal when the RF signal is applied to the source follower FET and the LO signal is applied to the common source FET. Further, the resistive frequency mixing apparatus performs a frequency mixing of an IF signal depending on an LO signal through the use of the source follower FET to produce an up-converted RF signal when the IF signal is applied to the common source FET and the LO signal is applied to the common source FET.

Abstract: A method for retransmitting data when data transmission/reception has failed in a wireless LAN system using visible light communication. A mobile node searches a received frame for a fast feedback slot allocated for retransmission information when momentary data transmission/reception failure has occurred. One mini-slot from among the plurality of mini-slots is selected from the fast feedback slot. The mobile node transmits a fast feedback message, including information for retransmission, to an access point by using the selected mini-slot.

Abstract: A mobile communication terminal includes a network knowledge manager collecting information required to seize an opportunity to execute an application by forming a network with a plurality of mobile communication terminals, and when a condition for executing a specific application is satisfied through the collected information, informing that the condition is satisfied, and a network instance manager generating a network instance which is a component of a network supporting the specific application, and performs management of the generated network instance including maintenance of the network instance when the specific application is executed by the network knowledge manager. A network can be promptly and ephemerally formed for a plurality of mobile communication terminals including smart phones to execute one application simultaneously, thereby reducing network management traffic required to form and maintain the network.

Abstract: A cognitive radio communication apparatus and method to control a sensing operation. The cognitive radio communication apparatus includes an information receiver to receive channel state information associated with a channel occupancy state of a primary system from at least one sensing node of a secondary system; a sensing control unit to control a sensing period of the at least one sensing node according to a change pattern of the channel occupancy state, based on the channel state information; and a control information transmitter to transmit control information associated with the controlled sensing period to at least one member node of the secondary system.

Abstract: In a method of manufacturing a flexible display substrate having reduced moisture permeability and reduced oxygen permeability, nanosized or microsized particles are uniformly dispersed in a molten polymer matrix. The molten polymer matrix are formed into plate-shaped molten polymer. The plate-shaped molten polymer is extruded between two extruding rollers to form a polymer or plastic sheet, to orient the nanosized or microsized particles in parallel with a surface of the polymer or plastic sheet. The polymer or plastic sheet is stretched between a glass transition temperature and a melting point to form a polymer or plastic film, exfoliating and orienting the nanosized or microsized particles further in parallel with a surface of the polymer or plastic film. The polymer or plastic film is coated with an organic film to flatten a surface of the flexible display substrate. Heat treatment is performed to cure the organic film.

Abstract: A wireless communication module includes a plurality of monolithic millimeter-wave integrated circuits (MMICs) for signal processing attached to the top surface of a multi-layer low temperature co-fired ceramic substrate; a planar transmission line formed on the top surface of the multi-layer substrate for communications between the MMICs; a metal base attached to the bottom surface of the multi-layer substrate and having an opening to which an antenna is attached; a plurality of vias for connecting the metal base and the planar transmission line within the multi-layer substrate to establish a uniform potential on a ground plane of the multi-layer substrate; an embedded waveguide formed in the opening surrounded with the vias within the multi-layer substrate; and a planar transmission line-to-waveguide transition apparatus for the transition of waves between the planar transmission line and the embedded waveguide.