Abstract: A method for forming a three-dimensional holographic image includes identifying a transmission matrix of a scattering material, calculating an incident wave-front corresponding to wave-front information for forming a three-dimensional holographic image, using the identified transmission matrix, and forming the calculated incident wave-front by controlling a wave-front control to modulate a light projected from a light source and forming a three-dimensional holographic image.

Abstract: Disclosed are a method and system for providing a user interface for an interactive broadcast program using a mobile instant messenger. The method for providing a user interface for an interactive broadcast program comprises the steps of: executing a chat room capable of participating in a broadcast program using a program ID, which is a buddy ID generated on a mobile instant messenger (IM), for the broadcast program; and displaying messages with regard to the broadcast program sent to or received from a user via the chat room. The step of displaying messages may provide a plurality of input buttons as a user interface (UI) for inputting messages from the user on the screen of the chat room, the input buttons enabling messages to be inputted for each participation objective in the broadcast program.

Abstract: Disclosed herein is a method of processing images based on image segmentation using higher-order correlation clustering. In an image segmentation method according to an embodiment of the present invention, an input image is segmented into superpixels. A hypergraph is constructed by connecting two or more adjacent superpixels, among the superpixels, to one another. A joint feature map is created by extracting feature vectors from respective edges of the hypergraph, and partitioning the hypergraph based on higher-order correlation clustering in consideration of specific constraints.

Abstract: There is provided a phase shift full bridge (PSFB) type power supply device controlling a switching on time of lagging leg switches according to a load state. The power supply device includes a power supply unit supplying preset DC power by switching input power using a full bridge by a phase shift method; and a control unit controlling a switching time of a switch of the full bridge according to a load state in which the DC power is received from the power supply unit.

Abstract: A method and system for providing a service based on space are disclosed herein. The method includes registering multiple smart access points respectively included in multiple spaces—each of the access points are connected to at least one Internet of Things (IoT) device that is further included in the corresponding space, providing first service control information to a first smart access point, in accordance with a request of the first smart access point, the first smart access point being accessed by a terminal of a user, among multiple access points, and providing second service control information to a second smart access point in accordance with a request of the second smart access point, when the terminal of the user accesses the second smart access point, among the multiple access points, and when the second smart access point recognizes a movement of the user.

Abstract: Disclosed are a system and a method for providing hint information of an interactive broadcast program. The program enabler service system for providing an interactive service for user participation of a broadcast program: includes a program generating unit for providing a tool for taking, as input, a question provided by the broadcast program and hint information relating to the question, and generating the question and hint information input via the tool in the form of a script for the broadcast program; a program execution unit for reading the question and hint information generated in the form of a script in connection with the broadcast program, and providing the read question and hint information to the user participating in the broadcast program via the communication channel provided by a service enabler; and a service connection unit for interconnecting the communication service platform of the service enabler and the program execution unit.

Abstract: Optical refraction and reflection control can be achieved by means of semiconductor silicon which has a p-n junction structure and a waveguide structure. According to the optical device using semiconductors of the present invention, the amplitude of light can be directly modulated using the reflection or refraction control. The optical device according to the preferred embodiment of the present invention includes: a first waveguide on which an optical signal is incident, and which is formed in the same direction as that of the incident optical signal; a second waveguide that forms a fixed angle with the first waveguide; and a reflector which is capable of selecting a path of the optical signal to the first waveguide or to the second waveguide as a refractive index is changed according to an applied voltage, and which is formed to have a fixed angle of inclination with respect to the first waveguide.

Abstract: Disclosed is a structure aware navigation method using a user input space and structure mapping between an input device and digital data. A user interface method executed by a computer includes steps of: mapping between a user input space of an input unit and a hierarchical structure of digital data; and recognizing a layer corresponding to the user input space and performing data navigation.

Abstract: Provided is a processor with a data transfer structure that is excellent in performance and efficiency. According to an aspect, the processor may include a plurality of processing elements, a plurality of routers respectively connected to the processing elements, and a plurality of connection links formed between the routers such that data is transferred between the processors via a network.

Abstract: A simple and easy method for fabricating graphene quantum dots with uniformed size and high quality of emission property comprises steps of, mixing graphite powders with metallic hydrate salts, forming an intercalation compound of graphite wherein metal ions are inserted by heating the mixed solution, and removing the metal ions from the intercalation compound of graphite. The graphene quantum dots is applicable to the development of electronic products in next generation such as display devices, recording devices, various sensors and nanocomputers and is applicable to biological and medicinal field as well.

Abstract: The present disclosure provides an AC-direct-type LED-lighting device including compensation circuit for AC input compensation, including a compensation inductor and first compensation capacitor parallelly connected to one terminal of AC input and a second compensation capacitor connected in series; rectifying unit for rectifying output from second compensation capacitor terminals to obtain direct current; and LED array driven by the rectifying unit output, wherein capacities of the first and second compensation capacitors and the compensation inductor and LED array output voltage are determined to cause 0.9 or larger cosine value of a phase, with respect to the AC input voltage, of resulting current obtained by dividing AC input voltage by sum of (i) parallel value of an equivalent impedance Re of the rectifying unit and LED array and an impedance of the second compensation capacitor and (ii) parallel value of impedances of the compensation inductor and first compensation capacitor.

Abstract: A method and system for detecting a coverage hole in a wireless network are disclosed. As a method for detecting a coverage hole realized by a computer, provided herein is a method for detecting a coverage hole comprising a step of obtaining multiple coordinates estimated from position information and signal status of an access point (AP), the AP being accessible by a subscriber user equipment, and a step of detecting a coverage hole of the subscriber user equipment by using the multiple position coordinates.

Abstract: A transparent specimen cutting method is provided using ultrafast laser and a dicing device for machining the transparent specimen. The cutting method includes forming a focal point by generating and focusing an ultrafast laser beam which has a pulse width of 10 fs-10 ps from a laser source and a center wavelength corresponding to the bandwidth of a transparent specimen, transmitting energy to the inside of the transparent specimen using the focused pulse laser beam by positioning the focal point of the pulse laser beam such that the focal point is positioned in an inner area on the inside of the both side surfaces of the transparent specimen, and generating and propagating cracks by relatively moving the focal point or the transparent specimen along a cut line in a desired shape such that cracks are propagated on the transparent specimen at a distance from the movement line of the focal point.

Abstract: An exemplary embodiment of the present invention provides an improved dielectric waveguide named electrical fiber. The electrical fiber with a metal cladding may isolate the interference of the signals in other wireless channels and adjacent electrical fibers, which typically causes band-limitation problem, for a smaller radiation loss and better signal guiding to lower the total transceiver power consumption as the transmit distance increases. Also, the electrical fiber may have frequency independent attenuation characteristics to enable high data rate transfer with little or even without any additional receiver-side compensation due to vertical coupling of the electrical fiber and an interconnection device.

Abstract: The present invention relates to a system and method for producing and executing an interactive broadcast program. A program enabler service system providing an interactive service for allowing users to participate in a broadcast program includes: a program-generating unit providing a tool for receiving broadcast program-related information so as to generate information received through the tool in a script format for the broadcast program; a program-executing unit providing information to users participating in the broadcast program through a communication channel provided by the service enabler after reading the information generated in the script format by interacting with the broadcast program; and a service-connecting unit connecting a communication service platform of the service enabler to the program-executing unit.

Abstract: Disclosed herein is a method of modeling consecutive 1:N relationships into consecutive identifying relationships in a database distributed over a multiple nodes and giving the primary key of the first 1-side relation of the consecutive 1:N relationships to remaining relations as the identifying key to avoid internode join. The method includes modeling entity sets participating in consecutive 1:N relationships into consecutive identifying relationships, and mapping the modeled consecutive identifying relationships and the entity sets to relations. The method also includes a method of storing tuples of relations potentially accessed together in the same node and a method of allocating a query to the node storing the tuples to be accessed together.

Abstract: A computer-aided simulation method for an atomic-resolution scanning Seebeck microscope (SSM) image is provided. In the computer-aided simulation method, a computer may calculate a local thermoelectric voltage for a position of a voltage probe, to acquire an SSM image corresponding to the position.

Abstract: An access point and a method for controlling an IoT (Internet of Things) device, using the access point. The method includes receiving a request for a service list from a user terminal through a smart access point communication with one or more IoT devices provided in one space; providing a list of virtual objects which are able to be provided out of virtual objects corresponding to the one or more IoT devices to the user terminal as the service list; receiving a control service request generated from the service list of the user terminal; identifying an IoT device corresponding to the control service request and requesting the identified IoT device for IoT control; and renewing a state of a virtual object corresponding to the identified IoT device based on a response of the identified IoT device and transmitting information on the state renewal to the user terminal.

Abstract: A method for determining a transmission power in a multi-input multi-output (MIMO) system based on a cooperative transmission is provided. The method includes setting a power constraint condition of a transmitter and target quality information of a receiver. The method further includes determining the transmission power to be allocated to the transmitter to transmit the data to the receiver based on the power constraint condition and the target quality information.

Abstract: The present invention provides a method for updating betweenness centrality of a graph, which obtains the betweenness centrality of an unweighted graph, which is updated when edges are updated. First of all, the method is performed by obtaining a minimum union cycle (an MUC) of the updated graph, and extracting an MUC (MUCU) containing a vertex, which is incident to the updated edge. And a first betweenness centrality due to the shortest paths in the MUCU, and a second betweenness centrality due to the shortest paths, not included in the MUCU, are calculated. And finally, a final betweenness centrality of the graph is obtained by adding the first and second betweenness centralities. By using the method, the search space and calculation cost can be remarkably reduced.