Abstract: Provided is a method for preparing an oligomer including: supplying a monomer stream and a solvent stream to a reactor to perform an oligomerization reaction to prepare a reaction product; supplying a discharge stream from the reactor including the reaction product to a separation device and supplying a lower discharge stream from the separation device to a settling tank; adding an organic flocculant to the settling tank to settle and remove a polymer and supplying the lower discharge stream from the separation device from which the polymer is removed to a high boiling point separation column; and removing a high boiling point material from the lower portion in the high boiling point separation column and supplying an upper discharge stream including an oligomer to a solvent separation column.

Abstract: The present disclosure relates to an apparatus for preparing an oligomer, the apparatus including: a reactor for oligomerizing a feed stream containing a fed monomer; a stirrer inserted into a hole formed in an upper portion of the reactor; and a solvent transfer line extending inward from a side of the reactor, wherein the stirrer includes a rotating shaft vertically extending downward from the upper portion of the reactor, and a blade having a conical shape whose vertex is positioned at a lower end of the rotating shaft and outer diameter increases from a bottom toward a top, and the solvent transfer line has a plurality of spray nozzles formed in a direction toward the blade.

Abstract: Provided is a method of producing an oligomer, the method including: supplying a monomer stream and a solvent stream to a reactor to perform an oligomerization reaction to produce a reaction product; supplying a discharge stream of the reactor to a separation device, and supplying an upper discharge stream of the separation device including an unreacted monomer to the reactor and supplying a lower discharge stream of the separation device to a settling tank; settling a polymer in the settling tank and removing the polymer, and supplying the lower discharge stream of the separation device from which the polymer is removed to a high-boiling point separation column; removing a high-boiling point material from a lower discharge stream of the high-boiling point separation column and supplying an upper discharge stream of the high-boiling point separation column including an oligomer to a solvent separation column; and separating a solvent and the oligomer in the solvent separation column.

Abstract: Disclosed herein is an apparatus for supporting time synchronization between unmanned vehicles, which includes a time synchronization message generation unit for generating a first time synchronization message, including information about a reference time base used to synchronize time of one or more unmanned vehicles or one or more boards within each unmanned vehicle; a communication unit for sending the first time synchronization message to the unmanned vehicle, the boards, or an additional apparatus for supporting time synchronization, connected over a network, and receiving a second time synchronization message from the unmanned vehicles or the additional apparatus for supporting time synchronization; and a time synchronization unit for determining an optimal time base using the first and second synchronization messages and synchronizing an internal time base with the unmanned vehicles, the boards, or the additional apparatus for supporting time synchronization using the optimal time base.

Abstract: Provided is a ship information conversion method. The ship information conversion method includes receiving an international electrotechnical commission (IEC) 61162-based sentence prescribed by IEC, analyzing an address field and a data field of the IEC 61162-based sentence, extracting an information type object, an attribute type, a data type object, and an enumerated data type object from the IEC 61162-based sentence by using a result of the analysis, and converting the IEC 61162-based sentence into a common maritime data structure (CMDS) which includes the extracted information type object, attribute type, data type object, and enumerated data type object.

Abstract: Provided is a ship information conversion method. The ship information conversion method includes receiving an international electrotechnical commission (IEC) 61162-based sentence prescribed by IEC, analyzing an address field and a data field of the IEC 61162-based sentence, extracting an information type object, an attribute type, a data type object, and an enumerated data type object from the IEC 61162-based sentence by using a result of the analysis, and converting the IEC 61162-based sentence into a common maritime data structure (CMDS) which includes the extracted information type object, attribute type, data type object, and enumerated data type object.

Abstract: Provided are a ship gateway apparatus and a status information displaying method thereof. The ship gateway apparatus includes a network interface configured to provide an interface with an external network system, a data input unit configured to receive, through the network interface, data transmitted from the external network system, a network connection establisher configured to establish a connection with the external network system, a data processor configured to process data, based on establishment information about the connection with the external network system established by the network connection establisher, a data output unit configured to output data, obtained through processing by the data processor, to the network interface, and a switching unit configured to transfer data, input through the data input unit, to the data processor and output the data, obtained through processing by the data processor, to the data output unit.

Abstract: A system and method for concurrently performing a group communication and a one-to-one communication in a wireless Internet Protocol (IP) network are disclosed. The method includes requesting, upon receipt of a one-to-one communication request from another terminal during a voice group communication, a concurrent mode service to the server by a compound terminal, determining, upon receipt of a group communication IP packet, whether there is a concurrent mode user among group members to receive a voice data packet corresponding to the group communication IP packet by a server, converting the group communication IP packet to a text data packet in the presence of a concurrent mode user by the server, transmitting the text data packet to the concurrent mode user by the server, and transmitting the voice data packet corresponding to the group communication IP packet to group communication mode users except for the concurrent mode user by the server.

Abstract: Provided are an embedded agent framework for providing a user with complex and convenient services required in a ubiquitous environment through intelligent cooperation between various embedded systems and a method of providing services using the same.

Abstract: Disclosed is a system and method for generating EJB components by extracting reusable business logic from servlet programs that is one of web program languages used in web-based applications. The system a servlet code analyzer that is a reverse engineering module for analyzing the existing servlet program source, a visualizer for visualizing the analyzed information, a business logic extractor for extracting a reusable business logic, and an EJB component generator for generating the EJB components using the extracted information. The servlet code analyzer considers the flexibility of coding permitted by the servlet program and the use of a multi-language, and the visualizer helps the understanding of the existing legacy program. The business logic extractor extracts the reusable module by extracting the business logic within many user interface related codes, and thus enable the reuse of software. The EJB component generator generates java codes in a jar file that can be deployed.

Abstract: In an apparatus for extracting enterprise beans from a servlet source code, a servlet source code input device receives the servlet source code and a Java class. A Java class extraction device extracts Java classes from the servlet source code. A Java class clustering device groups the Java classes on the basis of interrelated classes. A session bean extraction device and an entity bean extraction device extract a session bean and an entity bean from the clustered classes, respectively. An enterprise bean relationship information extraction device extracts relationship information between enterprise beans from the extracted session bean and entity bean.

Abstract: Disclosed is a system and method for generating EJB components by extracting reusable business logic from servlet programs that is one of web program languages used in web-based applications. The system a servlet code analyzer that is a reverse engineering module for analyzing the existing servlet program source, a visualizer for visualizing the analyzed information, a business logic extractor for extracting a reusable business logic, and an EJB component generator for generating the EJB components using the extracted information. The servlet code analyzer considers the flexibility of coding permitted by the servlet program and the use of a multi-language, and the visualizer helps the understanding of the existing legacy program. The business logic extractor extracts the reusable module by extracting the business logic within many user interface related codes, and thus enable the reuse of software. The EJB component generator generates java codes in a jar file that can be deployed.