Abstract: An apparatus and method for managing application context is provided. A first one of a plurality of terminals, each including at least one application, collects and transmits context information of the application to a migration server so that it is stored and managed in the migration server. The migration server transmits the stored and managed context information to a second terminal corresponding to the first terminal in response to a request of the second terminal. The second terminal restores context based on the context information received from the migration server. This can reproduce the same application and desktop environments as those previously set to be suitable for each work situation, thereby increasing user convenience.

Abstract: The present invention discloses a method of distributing files over a network, which can attain a proper balance of transfer rates of active spanning trees used between a transmitting node and a receiving node and minimize the time taken for transferring a large file in a P2P (Peer-to-Peer) environment by forming an optimal set of distribution trees with reference to the link costs between the transmitting node and the receiving node and distributing chunk files through the optimal set of distribution trees. The method comprises the steps of: forming a set of spanning trees between a transmitting node and a receiving node and forming a minimum cost tree group by the sum of the link costs of links constituting each of the spanning trees; adjusting the transfer rate of each spanning tree belonging to the minimum cost tree group in accordance with the link cost of each spanning tree belonging to the minimum cost tree group; and transferring chunk files through the spanning trees whose transfer rate is adjusted.

Abstract: The present invention relates to a hyaluronic acid producing strain Streptococcus sp. KL0188 and a method for purifying hyaluronic acid, more particularly to a Streptococcus sp. KL0188 that does not express hyaluronidase and is non-hemolytic, and a method for purifying hyaluronic acid using an aromatic adsorption resin and an active carbon.

Abstract: Provided are a super peer based P2P network system and a peer authentication method thereof. The authentication method includes a first authentication process and a second authentication process. In the first authentication process, a user and a peer which want to use a P2P network are verified by submitting authentication information and a public key infrastructure (PKI) certificate, and receive the permission of connection. In the second authentication process, a user and a peer requesting the use of a specific service are authenticated by using an authentication ticket and a service access-permitted time is limited in order to reinforcing the security of the specific service, which is searched in the P2P network and provided by the peer. Accordingly, the service providers can verify users more securely and limit the service available time of each user with respect to a specific service provided by the peer by using the lifetime of the ticket.

Abstract: A Peer-to-Peer (P2P) based social networking service method for providing a social networking service, includes transmitting a request to a peer group and performing a group-based social networking service; transmitting news or a question to peers in the peer group, and then receiving a response to the question; and storing the received information in a storage medium, and uploading specific information among the stored to a rendezvous peer. The method further includes delivering the uploaded specific information to another rendezvous peer in a network. A P2P based social networking service system includes a P2P middleware unit for providing services of communicating between and grouping the peers; a P2P service application program interface layer for providing a network element function; and a P2P application service layer for calling the network element function, if required, to thereby provide a user with a P2P based network service.

Abstract: A dynamic user interface (UI) system and method is provided for remote controlling of a legacy device, which is not compatible with a peer-to-peer (P2P) middleware, through a P2P network. The dynamic UI system of the present includes at least one legacy device, a proxy for registering and managing the at least one legacy device and supporting a dynamic remote control user interface using a multi legacy device control protocol, and an edge peer for downloading the dynamic remote control user interface from the proxy and requesting control of the at least one legacy device to the proxy.

Abstract: A method of creating a security group over a Peer-To-Peer (P2P) network is disclosed. An invitee terminal attaches a public key to a peer advertisement in which its own identification information is encrypted using its own private key, and then sends a resulting peer advertisement over the P2P network. An inviter terminal, which has found the peer advertisement, encrypts a group advertisement, including group information about the security group, using public keys of the corresponding invitee terminal, and then sends a resulting group advertisement to the invitee terminal desired to be invited to the security group. The invitee terminal decrypts the group advertisement using its own private key, and participates in the security group using the group information.

Abstract: A peer-to-peer service method and system are provided. The peer-to-peer service method include advertising E-mail address information and service and sharing resource information through a peer-to-peer network at peers, determining whether a peer requesting a service and a peer providing the service are in online state or in offline state on the peer-to-peer network, and providing a peer-to-peer service through an E-mail server when the peer requesting the service or the peer providing the service is in offline state. The peer-to-peer service system and method using an E-mail service are capable of providing a variety of P2P services (e.g., a message exchange, a file exchange, a remote control, etc.) to peers, which are in online state or temporarily in offline state, by using the E-mail in the P2P network environment which manages the connection information of the peers joined to the corresponding service or the indexes of the sharing resources.

Abstract: Provided is a method and system for streaming multimedia data between hetero UPnP networks configured of a private network. The method comprises establishing a communication channel with a relay peer; establishing a virtual communication channel with a specific extensible home connector selected from a plurality of extensible home connectors connected with the relay peer; searching multimedia data to play from multimedia data in the specific extensible home connector which exists on the UPnP network through the virtual communication channel; establishing a communication environment through the UPnP internet gateway of the specific extensible home connector in case of demanding play of the searched multimedia data; and receiving multimedia data from the specific extensible home connector through the communication environment.

Abstract: There is provided a method of selling in a shopping mall server. The method includes: displaying at least one sale content as sale information of a product selected to be sold; displaying a interested sale content selected by consumer among the sale contents; performing a payment transaction via a payment system when the selected product is determined to be purchased.

Abstract: An extended home service apparatus and a method of provided an extended home service capable of easily developing an application service based on a peer-to-peer (P2P) network are provided.

Abstract: A peer-to-peer (P2P proxy server and a communication method thereof are provided.

Abstract: An apparatus and method for automatically migrating user's working data by using automatic work data migration apparatuses connected respectively to work devices. In the method, the automatic work data migration apparatus detects that the user leaves or accesses the work device. User work data related to the work device are collected and the collected user work data stored in the automatic work data migration apparatus, if it is detected that the user leaves the work device. The storage location information of the user work data is provided to another automatic work data migration apparatuses connected to the automatic work data migration apparatus. The automatic work data migration apparatus searches the storage location information of the user work data if it is detected that the user accesses the work device. The automatic work data migration apparatus connected to the work device accessed by the user receives the user work data related to a work executed in the previous work device.

Abstract: A home network system and a method for installing home services in the home network system are provided. The home network system includes a service distribution management system that remotely manages a plurality of home gateways installed in homes of service users and services installed on the plurality of home gateways. The method includes performing user registration of a service user who desires to receive a service, registering a service to be provided to the service user, performing initial registration of a home gateway which a system manager has installed in a home of the service user according to the user registration, managing at least one home gateway group set by the system manager, and performing management of a task for remotely installing a service on a home gateway group that is an installation target of the service.

Abstract: An apparatus and method for managing application context is provided. A first one of a plurality of terminals, each including at least one application, collects and transmits context information of the application to a migration server so that it is stored and managed in the migration server. The migration server transmits the stored and managed context information to a second terminal corresponding to the first terminal in response to a request of the second terminal. The second terminal restores context based on the context information received from the migration server. This can reproduce the same application and desktop environments as those previously set to be suitable for each work situation, thereby increasing user convenience.

Abstract: The present invention relates to a novel sulfonamide derivatives and novel intermediates thereof, preparation thereof, and a pharmaceutical composition comprising the same, and more particularly, to novel sulfonamide derivatives and intermediates thereof that are used as angiogenesis controlling material and that can inhibit overexpression of matrix metalloproteinase that decomposes protein constituents in extracellular and basement membranes of connective tissues, and preparation methods thereof, and a pharmaceutical composition comprising the same.

Abstract: A method and system for collecting and restoring application state is provided. To process application state information, the system registers various types of applications, searches for an application control library of an application which a user has selected from registered applications, dynamically links to the found application control library, and selectively collects and restores state information of the application using the dynamically linked application control library. Thus, the system can dynamically add or modify an application control interface for selectively collecting and restoring the application state information, thereby improving the security of personal data.

Abstract: The present invention relates to a hyaluronic acid producing strain Streptococcus sp. KL0188 and a method for purifying hyaluronic acid, more particularly to a Streptococcus sp. KL0188 that does not express hyaluronidase and is non-hemolytic, and a method for purifying hyaluronic acid using an aromatic adsorption resin and an active carbon.

Abstract: Disclosed is a system for dynamically updating remote service objects to manage a network device having various characteristics by Java RMI (Remote Method Invocation), and a method thereof. The system includes a network device manager for authenticating a transmission message communicated between a network device and a management device and transferring and initializing objects for management of the network device, and a management agent. The management method includes a remote object transmission step, a remote object authentication step, a remote object installation step, and a network device management step.