Abstract:
A server, terminal, and method for supporting mobility in a network are provided. A server includes a storage which stores a double chord lookup table including server search information based on identifiers and location information of terminals on a network, a controller which finds a server for providing an optimal routing path between a receiving terminal and a transmitting terminal for sending a packet to the receiving terminal, using the double chord lookup table, where a trigger including an identifier and location information for identifying the receiving terminal is received from the receiving terminal, and a communicator which reports the location of the found server to the receiving terminal and the transmitting terminal.
Abstract:
A cholesteric liquid crystal display device includes: a plurality of pixel units arranged two-dimensionally between two transparent substrates. Each of the plurality of pixel units includes a cholesteric liquid crystal layer having a single-layer structure. The cholesteric liquid crystal layer includes: a liquid crystal molecule; a chiral dopant; and an optically polymerizable polymer. The chiral dopant is mixed with the liquid crystal molecule to form a cholesteric phase and has a solubility that varies with respect to the liquid crystal molecule according to temperature. The optically polymerizable polymer is cured to fix a helix pitch of the cholesteric phase.
Abstract:
A method and apparatus method of calculating attachment location and thickness of a supplement pad to be attached to a member includes a first step of receiving information on flatness measurement points from a unified management server which have previously been calculated during design of the member, a second step of calculating a three-dimensional coordinate at each of the flatness measurement points on the member, and a third step of calculating the attachment location and thickness of the supplement pad to be attached to the member on the basis of the calculated three-dimensional coordinates. The second step includes bringing an indoor GPS sensor into contact with the member at each of the flatness measurement points, and calculating the three-dimensional coordinate on an end of the indoor GPS sensor, which is in contact with the member, through the use of another indoor GPS installed on the member
Abstract:
A method for a hybrid service discovery adapting between push-based and pull-based schemes in a mobile ad-hoc network and a system thereof. The method includes periodically transmitting a first control packet for providing service information from a service provider that is capable of providing a service to nodes located in a specified advertisement zone, transmitting a second control packet requesting the service from a service demander to one or more nodes in a network, and transmitting a third control packet including path information of the service provider if at least one of the nodes located within the advertisement zone and the service provider receives the second control packet. The method and the system can reduce the amount of control packet transmission and minimize an end-to-end delay.
Abstract:
An ad-hoc network and routing method that takes account of mobility are provided. The ad-hoc network includes at least one node, which calculates a probability that a neighbor node is present in a transmission range of the node, generates a message containing the calculated probability, and transmits the message to the neighbor node. The at least one node may also update the message with a lower probability of the calculated probability and a probability contained in the message, and transmit the updated message to the neighbor node. The node may also determine as a route a path along which a message is transmitted from the message containing the highest probability among probabilities contained in messages that are received.
Abstract:
An ad-hoc network for routing extension by supporting the IPv6 protocol and a method for routing extension. The ad-hoc network comprises a gateway for appending an address configuration message to an ad-hoc Routing REPly (RREP) message and transmitting an extended ad-hoc RREP message; and a node for separating the address configuration message from the received extended ad-hoc RREP message, establishing a packet transmission path using the ad-hoc RREP message, and configuring a global address using the separated address configuration message. Accordingly, the present invention provides efficiency and improves the network scalability by utilizing the existing IPv6 protocol without amendments and reducing the size of the packet transmitted.
Abstract:
Provided is a pass gate circuit capable of operating stably in a transition phase of an input signal, a self-refresh circuit including the pass gate circuit, and a method of controlling the pass gate circuit. The pass gate circuit according to the present invention includes a pass gate unit and a pass gate control unit. The pass gate unit delays an input signal for a fixed duration and outputs the delayed input signal as an output signal in response to a switching control signal. The pass gate control unit outputs the switching control signal, and in response to an internal control signal, determines the existence of a transition in the input signal, and enables or disables the switching control signal according to the determination. The pass gate circuit, the self-refresh circuit including the same, and the control method of the pass gate circuit are capable of operating stably in the transition phase of the input signal.
Abstract:
A cholesteric liquid crystal display device includes: a plurality of pixel units arranged two-dimensionally between two transparent substrates. Each of the plurality of pixel units includes a cholesteric liquid crystal layer having a single-layer structure. The cholesteric liquid crystal layer includes: a liquid crystal molecule; a chiral dopant; and an optically polymerizable polymer. The chiral dopant is mixed with the liquid crystal molecule to form a cholesteric phase and has a solubility that varies with respect to the liquid crystal molecule according to temperature. The optically polymerizable polymer is cured to fix a helix pitch of the cholesteric phase.
Abstract:
Disclosed is an apparatus for monitoring a building status achieved during building a cavity frame such as an internal freight warehouse of a cargo. The apparatus for monitoring a building status of a cavity frame includes a portable computer, a central host computer, and an indoor global positioning system. The portable computer remotely accesses the central host computer and downloads information on a work schedule, and the central host computer receives information on problems during works from the portable computer. The indoor global positioning system remotely accesses the central host computer to transmit positional information of a working robot in the cavity frame. The central host computer then transmits, to the working robot, an instruction to perform a corresponding work at a position of the working robot.
Abstract:
A semiconductor memory device capable of operating in a plurality operating modes and a method for controlling the device may be provided. The semiconductor memory device may include a selecting unit and a plurality of control circuits operating in a plurality of operating modes. The selecting unit may transmit a selecting signal to select one of the plurality of operating modes. The plurality of control circuits may control operations of the semiconductor memory device in the plurality of operating modes, and the plurality of control circuits may be either enabled or disabled in response to the selecting signal. The semiconductor memory device and the method of controlling the device may have a capability of providing optimized performance in response to a change of operational conditions by selecting one of a plurality of the operating modes.