Abstract: An optical system according to an embodiment includes first to third lenses disposed along an optical axis from an object side to a sensor side direction, wherein the first lens has a meniscus shape convex toward the object side, and satisfies 1.7?nt_1?2.3 and TTL?6 mm. (nt_1 is the refractive index of the first lens with respect to the light of the t-line wavelength band, and TTL is the distance on the optical axis from the object-side surface of the first lens to the upper surface of the image sensor.

Abstract: Disclosed is a method of processing item sales information by an electronic apparatus including acquiring a purchase request including item information related to an item selected by a user and information related to a payment means, providing a purchase response including approval information corresponding to the purchase request before proceeding with payment through the payment means in response to the purchase request when the information related to the payment means satisfies a first condition, transmitting a release request for the item to a first server; and requesting payment for at least some of an amount corresponding to one or more purchase requests related to the payment means according to an arrival of settlement timing corresponding to the payment means.

Abstract: An embodiment device includes an input module including a motor configured to generate a rotational force, an output module configured to receive power from the input module to be rotatable, and a connection module having a first side coupled to the input module and a second side, opposite the first side, coupled to the output module, wherein the connection module is configured to transmit the power from the input module to the output module.

Abstract: A plant cultivation apparatus of the present disclosure is proposed. In the plant cultivation apparatus, a portion where a bed cover is seated is maintained in a state of being positioned in a cultivation room together with the bed cover. In addition, the present disclosure proposes that other portions excluding the portion where the bed cover is seated are configured to be ejected from the cultivation room as needed. Therefore, the bed is washed without separation of the pod.

Abstract: A plant cultivation apparatus of the present disclosure is proposed. In the plant cultivation apparatus, a machine chamber is configured to be open forward of the cabinet so that indoor air is suctioned and discharged therethrough. Accordingly, even when the plant cultivation apparatus is provided in a specific place in a built-in method, air circulation is smoothly performed.

Abstract: Disclosed are a refrigerator and a folding guide device provided therein. The refrigerator includes a body including a storage compartment, a door that opens and closes the storage compartment, a support provided to be changeable in position to an unfolded position to be unfolded outward from the storage compartment and a folded position to be folded in the storage compartment, a folding guide device interlinked with an opening and closing operation of the door to apply a rotational force for changing the position of the support to the support. Here, the folding guide device includes a slider pressurized by the door and linearly moved, and a conversion outputter provided to connect the slider with the support and configured to convert a linear force input by the slider that linearly moves into a rotational force for changing the position of the support and output the rotational force.

Abstract: A server is provided comprising a processor configured to: receive an indication of a location of a first device that is subscribed to a disaster notification service; in response to receiving a disaster alert, detect that the first device is located in an area associated with the disaster based on the indication of the location of the first device; identify a second device that has registered the first device as a friend; and transmit a first indication of the disaster to the first device and a second indication of the disaster to the second device.

Abstract: Disclosed are a refrigerator and a folding guide device provided therein. The refrigerator includes a body including a storage compartment, a door that opens and closes the storage compartment, a support provided to be changeable in position to an unfolded position to be unfolded outward from the storage compartment and a folded position to be folded in the storage compartment, a folding guide device interlinked with an opening and closing operation of the door to apply a rotational force for changing the position of the support to the support. Here, the folding guide device includes a slider pressurized by the door and linearly moved, and a conversion outputter provided to connect the slider with the support and configured to convert a linear force input by the slider that linearly moves into a rotational force for changing the position of the support and output the rotational force.

Abstract: An apparatus and method for controlling a transmission timing of push messages in a system that provides a location-based push service. An electronic device transfers its own network information to a push server when connecting to the push server. The push server classifies electronic devices based on network information. At startup, the push server divides the electronic devices classified based on the network information into a plurality of groups, each including a predetermined number of electronic devices, and transmits push messages per unit of the groups. The push server measures a response time period taken to receive acknowledge messages in response to the push messages in a group, and adjust a waiting time for correcting a transmission time of push messages based on the response time period. The push server transmits push messages to electronic devices of the next group based on the adjusted waiting time.

Abstract: Disclosed is an electronic device including a memory storing collected location information of the electronic device, and a processor configured to convert the collected location information into code information which represents a specific area of the earth. The electronic device transmits the code information to a disaster information providing device for which location information management is required in association with the provision of disaster information. Further disclosed is a disaster information providing system including the providing device and a plurality of mobile electronic devices. Disaster-related information is provided to those devices determined to be located within a damage zone, as determined by location information obtained by the respective devices and provided to the disaster information providing device.

Abstract: A server is provided comprising a processor configured to: receive an indication of a location of a first device that is subscribed to a disaster notification service; in response to receiving a disaster alert, detect that the first device is located in an area associated with the disaster based on the indication of the location of the first device; identify a second device that has registered the first device as a friend; and transmit a first indication of the disaster to the first device and a second indication of the disaster to the second device.

Abstract: A method for display, at a first electronic device, identification information about a second electronic device is provided. The method includes receiving a call or a message from the second electronic device, requesting identification information about the second electronic device to a server, receiving the requested identification information from the server, and displaying the received identification information on a screen. The identification information comprises relation information between the first electronic device and the second electronic device.

Abstract: An apparatus and method for controlling a transmission timing of push messages in a system that provides a location-based push service. An electronic device transfers its own network information to a push server when connecting to the push server. The push server classifies electronic devices based on network information. At startup, the push server divides the electronic devices classified based on the network information into a plurality of groups, each including a predetermined number of electronic devices, and transmits push messages per unit of the groups. The push server measures a response time period taken to receive acknowledge messages in response to the push messages in a group, and adjust a waiting time for correcting a transmission time of push messages based on the response time period. The push server transmits push messages to electronic devices of the next group based on the adjusted waiting time.

Abstract: An apparatus and method for efficiently controlling transmission of a large amount of push messages based on a location in a system of providing a location-based push service is disclosed. A push server is configured to search for at least one target electronic device to which a push message is to be transmitted, from among a plurality of electronic devices maintaining sessions with the push server, with reference to a table that stores location information of the plurality of electronic devices. The push server is also configured to transmit the push message to the found at least one target electronic device. Accordingly, since operation of searching for at least one target electronic device satisfying a location condition from among a plurality of electronic devices maintaining sessions with a push server is distributively processed by at least one push server, push messages is quickly transmitted.

Abstract: Provided are a scheduling method and apparatus for guaranteeing real-time service quality of Wireless Broadband (WiBro) customer premises equipment (CPE). The scheduling apparatus includes: a real-time protocol (RTP) packet monitoring unit for monitoring an RTP packet passing through a local area network (LAN) section and detecting a bandwidth of real-time service; and a queue managing unit for determining a window size corresponding to the bandwidth of real-time service checked by the RTP packet monitoring unit and generating/changing a real-time service queue. The scheduling method and apparatus monitor an RTP packet and adjust a real-time service queue, thereby ensuring real-time service quality of terminals.

Abstract: Provided are a scheduling method and apparatus for guaranteeing real-time service quality of Wireless Broadband (WiBro) customer premises equipment (CPE). The scheduling apparatus includes: a real-time protocol (RTP) packet monitoring unit for monitoring an RTP packet passing through a local area network (LAN) section and detecting a bandwidth of real-time service; and a queue managing unit for determining a window size corresponding to the bandwidth of real-time service checked by the RTP packet monitoring unit and generating/changing a real-time service queue. The scheduling method and apparatus monitor an RTP packet and adjust a real-time service queue, thereby ensuring real-time service quality of terminals.

Abstract: A receptacle includes an insulated outer case, first and second trip switches formed on an inner bottom of the insulated case, a reset switch formed on the inner bottom of the insulated outer case, a cover disposed on a top of the outer case, first and second test buttons disposed in the insulated outer case to be movable in a vertical direction, each of the first and second test buttons having a bottom adjacent to the corresponding trip switch and a top exposed through the cover, a first spring for biasing the first and second test buttons to an initial position, a reset button disposed in the insulated outer case to be movable in a vertical direction, the reset button having a bottom adjacent to the reset switch and a top exposed through the cover, and a locking portion for selectively locking the reset button in response to the vertical motion of the first and second test button.

Abstract: A receptacle includes an insulated outer case, first and second trip switches formed on an inner bottom of the insulated case, a reset switch formed on the inner bottom of the insulated outer case, a cover disposed on a top of the outer case, first and second test buttons disposed in the insulated outer case to be movable in a vertical direction, each of the first and second test buttons having a bottom adjacent to the corresponding trip switch and a top exposed through the cover, a first spring for biasing the first and second test buttons to an initial position, a reset button disposed in the insulated outer case to be movable in a vertical direction, the reset button having a bottom adjacent to the reset switch and a top exposed through the cover, and a locking portion for selectively locking the reset button in response to the vertical motion of the first and second test button.