Abstract: Multi-state switchability is highly desirable in optoelectronic devices. For liquid crystal (LC) based devices, the stability of any configuration is achieved through a balance between imposed interactions and the LC's orientational elasticity. In most cases, the latter acts to resist deformation. By combining surface topography and chemical patterning, provided here are the effects of saddle-splay orientational elasticity, a property that, despite being intrinsic to all LCs, is routinely suppressed. Utilizing theory and continuum elastic calculations, provided here are example conditions for which, even using generic, achiral LC materials, spontaneously broken surface symmetries develop. Also provided are multi-stable devices in which a weak, but directional, applied field switches between spontaneously-polar surface state domains. The disclosed approach is useful in low-field and fast-switching optoelectronic devices, beyond those attainable by current technologies.

Abstract: Multi-state switchability is highly desirable in optoelectronic devices. For liquid crystal (LC) based devices, the stability of any configuration is achieved through a balance between imposed interactions and the LC's orientational elasticity. In most cases, the latter acts to resist deformation. By combining surface topography and chemical patterning, provided here are the effects of saddle-splay orientational elasticity, a property that, despite being intrinsic to all LCs, is routinely suppressed. Utilizing theory and continuum elastic calculations, provided here are example conditions for which, even using generic, achiral LC materials, spontaneously broken surface symmetries develop. Also provided are multi-stable devices in which a weak, but directional, applied field switches between spontaneously-polar surface state domains. The disclosed approach is useful in low-field and fast-switching optoelectronic devices, beyond those attainable by current technologies.

Abstract: The present invention relates to a method for fabricating an array of nanoparticle clusters, in which a thermally transformable organic liquid crystal film having a periodic array of micro-sized dimple-like defect structures spontaneously transformed by thermal sublimation of liquid crystal molecules is used as a template, and nanoparticles form self-assembled clusters having a uniform size with respect to the defect structures, thereby achieving a periodic array of nanoparticle clusters.

Abstract: The present invention relates to a method for fabricating an array of nanoparticle clusters, in which a thermally transformable organic liquid crystal film having a periodic array of micro-sized dimple-like defect structures spontaneously transformed by thermal sublimation of liquid crystal molecules is used as a template, and nanoparticles form self-assembled clusters having a uniform size with respect to the defect structures, thereby achieving a periodic array of nanoparticle clusters.

Abstract: Methods and apparatuses are provided for providing an internet service by a server in a communication system. A user interface for selecting whether to provide a search service based on location information of a subscriber station, is provided to the subscriber station. If the subscriber station selects to be provided the search service based on the location information, the location information of the subscriber station is acquired using a location information server or a cell identifier (ID) according to an existence of the location information server in the communication system. Data is sought based on the location information. The data is provided to the subscriber station.

Abstract: Methods and apparatuses are provided for providing an internet service by a server in a communication system. A user interface for selecting whether to provide a search service based on location information of a subscriber station, is provided to the subscriber station. If the subscriber station selects to be provided the search service based on the location information, the location information of the subscriber station is acquired using a location information server or a cell identifier (ID) according to an existence of the location information server in the communication system. Data is sought based on the location information. The data is provided to the subscriber station.

Abstract: A method for operating additional information related to video displayed on a display device by a terminal apparatus communicable with the display device, includes receiving first data related to the video from the display device, displaying information included in the first data on a built-in display and receiving at least one of the displayed information, which is selected by a user, generating an additional information request message for requesting the information selected by the user, sending the additional information request message to the display device, receiving from the display device second data including additional information corresponding to the additional information request message, and displaying the second data on the built-in display.

Abstract: A method for providing an Internet service based on location information of a subscriber station in a communication system. The Internet service method includes, upon receipt of a search request from a subscriber station, determining whether a network accessed by the subscriber station can support a Universal Service Interface (USI), acquiring location information of the subscriber station if the network accessed by the subscriber station can support the USI, and providing an Internet service based on the acquired location information of the subscriber station to the subscriber station.

Abstract: An apparatus and method for providing Short Message Service (SMS) and Multimedia Messaging Service (MMS) over a wired telephone network are provided. In an Access Point (AP), an access module provides a wireless connection interface for wireless communication with a convergence terminal. A control module controls wireless communication and communications with the wired telephone network to provide the SMS and the MMS to the convergence terminal via the access module. A wired phone module, connected to the access module and the wired telephone network, exchanges wireless communication signals with the wired telephone network. An SMS processor, connected to the access module and the wired telephone network, processes SMS transmission and reception, and an MMS processor, connected to the access module, processes MMS transmission and reception.

Abstract: A media transmission method and apparatus of a first server using a session-based messaging service in a communication system. The first server sets Media Relay Capacity (MRC) information of a first User Equipment (UE), transmits the set MRC information to a second server, receives a response from the second server after transmitting the MRC information, and notifies the response to the first UE. The response is a response that the second server has received from a second UE after notifying the second UE of the setting of the MRC information.

Abstract: Disclosed herein is a cancer sensitizer comprising glucosamine, a glucosamine derivative, or a salt thereof. When administered to patients with cancer, the cancer sensitizer functions to sensitize cancer cells to anticancer agents without producing side effects, thereby increasing the therapeutic efficiency of chemotherapy.

Abstract: Method and device for exchanging messages in a VLC navigation system is provided, in which a map server generates a provision message in the form of visible light signals through all lamps in an area, using a PLC network, where a navigation service is provided, a terminal that wants to implement the navigation service among terminals that have received the provision message transmits a registration request message to the map server, the map server transmits a registration response message for the registration request message to the terminal, the terminal transmits a map request message including information about a destination to the map server, the map server transmits a map response message including information about a path to the destination to the terminal, and the terminal displays map information and the path.

Abstract: A time-sharing Visible Light Communication (VLC) system is provided. Two or more light sources transmit data received from one or more VLC terminals located in its service area to a communication control device, and transmits data received from the communication control device to the one or more VLC terminals. The communication control device determines and groups at least one of the two or more light sources to be included in a cell according to a generated user service, maps the grouped at least one light source to the cell, allocates a time slot used to provide the user service to the cell, transmits data associated with the user service to at least one of the one or more VLC terminals through the at least one light source mapped to the cell using the allocated time slot, detects a location of the at least one VLC terminal located in a service area of the cell on a real-time basis, and remaps the cell according to the detected location.

Abstract: A self-organizing resource access method is provided for transmitting data by self-organizing resource access by each individual node in a Local Area Network (LAN) communication environment where at least two nodes exchange data with each other. A first node listens to at least one data transmission of at least one other node connected to the LAN, and adjusts a data transmission start time of the first node in accordance with a data transmission start time of the at least one other node so that the data transmission start time of the first node does not overlap the data transmission start time of the at least one other node. The first node transmits data to the at least one other node at the adjusted data transmission start time.

Abstract: A method and system for transmitting/receiving data in a communication system are provided, in which upon generation of IM service data to be transmitted to a second MS, a first MS requests paging to a second MS to an IM server, the IM server transmits a paging message to the second MS in response to the paging request, and the second MS receives the IM service data from the first MS, after receiving the paging message.

Abstract: Method and device for exchanging messages in a VLC navigation system is provided, in which a map server generates a provision message in the form of visible light signals through all lamps in an area, using a PLC network, where a navigation service is provided, a terminal that wants to implement the navigation service among terminals that have received the provision message transmits a registration request message to the map server, the map server transmits a registration response message for the registration request message to the terminal, the terminal transmits a map request message including information about a destination to the map server, the map server transmits a map response message including information about a path to the destination to the terminal, and the terminal displays map information and the path.

Abstract: Method and device for exchanging messages in a VLC navigation system is provided, in which a map server generates a provision message in the form of visible light signals through all lamps in an area, using a PLC network, where a navigation service is provided, a terminal that wants to implement the navigation service among terminals that have received the provision message transmits a registration request message to the map server, the map server transmits a registration response message for the registration request message to the terminal, the terminal transmits a map request message including information about a destination to the map server, the map server transmits a map response message including information about a path to the destination to the terminal, and the terminal displays map information and the path.

Abstract: Method and device for exchanging messages in a VLC navigation system is provided, in which a map server generates a provision message in the form of visible light signals through all lamps in an area, using a PLC network, where a navigation service is provided, a terminal that wants to implement the navigation service among terminals that have received the provision message transmits a registration request message to the map server, the map server transmits a registration response message for the registration request message to the terminal, the terminal transmits a map request message including information about a destination to the map server, the map server transmits a map response message including information about a path to the destination to the terminal, and the terminal displays map information and the path.

Abstract: Disclosed is a method for interfacing in a communication system. The method includes receiving an event, which should be processed using information managed by a second system providing a second service, from a first system providing a first service; and performing an interface so that the second system performs an operation corresponding to the event by using the information.

Abstract: A system and method for providing a service in a communication system are provided, in which upon receipt of a request for provisioning of the service with a requested QoS class from an MS, a service server transmits a QoS information request message to an interface server and, upon receipt of a QoS information response message for the QoS information request message from the interface server, the service server provides the service with the requested QoS class to the MS.