• Proceedings of the KIEE Conference
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• 2003.07d
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• pp.2645-2647
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• 2003

E-Mail은 현재 가장 많이 쓰이고 있는 인터넷 서비스로서 최근 인터넷 사용자의 증가와 함께 그 사용자 또한 늘어나고 있다. 기존의 메일 기반 에이전트는 서버에 무분별하게 메일을 저장하는 방식이기 때문에, 첨부파일에 접근하기 위해서는 관리자가 수신된 메일을 일일이 확인해야 하는 번거로움을 가지고 있다. 대량의 메일을 수신하는 기업에서는 메일 뿐만 아니라 첨부되어오는 파일들에 대한 처리부담이 더욱 크다. 본 논문에서는 이를 보완하기 위해 도착한 메일의 내용을 분석하여 키워드를 추출하고, 폴더를 생성하여 카테고리별로 첨부된 파일을 분류해주는 자동분류 에이전트를 제안하고자 한다. 카테고리 별로 분류된 파일은 다시 형식별로 분류되도록 설계하였다. 이는 관리자의 업무부담을 줄이고, 첨부파일을 효과적으로 관리할 수 있는 장점이 있다.

• Korean Journal of Child Studies
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• v.37 no.6
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• pp.119-132
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• 2016

Objective: The purpose of this study was to analyze the operation and personal information management of public and private kindergarten homepages. Methods: A total of 2,846 kindergartens were selected from the I-Sarang portal service for analyzing operation, and 217 self-operating homepages were selected for evaluating management. Seven evaluation items from three domains (information gathering procedures and scope, information security, and management of file exposure protection) were used. Wireshark and Google were used for analyzing some evaluation items. Results: The operating ratio of kindergarten homepages was low and most of the kindergartens self-operated their homepages. The evaluation of the information gathering procedures and scope showed that the rule of consent process was not rigidly followed but that the rule of legality for information gathering was followed. Items related to information security were followed at very low levels. As for the management of file exposure protection, the evaluation of items related to the prevention of attachment disclosure showed that the rule of protecting personal information included in an attached file was followed but that the notice regarding information protection was not. Across all evaluation items, the level of personal information management was higher in public (vs. private) kindergartens. Conclusion: These results indicate methods to more securely and effectively manage personal information on kindergarten homepages.

• Convergence Security Journal
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• v.13 no.4
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• pp.109-115
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• 2013

Security threats through e-mail service, a representative tool to convey information on the internet, are on the sharp rise. The security threats are made in the path where malicious codes are inserted into documents files attached and infect users' systems by taking advantage of the weak points of relevant application programs. Therefore, to block infection of camouflaged malicious codes in the course of file transfer, this work proposed an integrity-checking and behavior-based detection system using File Transfer System (FTS), logical network partition, and conducted a comparison analysis with the conventional security techniques.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04b
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• pp.37-39
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• 2002

본 논문은 SAN(storage area network)강에 네트워크-부착형 (network-attached) 저장 장치들을 직접 연결하여 화일 서버 없이 직접 데이터 전송이 가능한 SAN 기반의 리눅스 클러스터 공유 화일 시스템인 SANique$^{TM}$의 오류 탐지 기법 및 회복 기법에 대하여 기술한다. 클러스터 내의 노드 오류에 의해 발생하는 "split-brain"오류 상황 및 문제점을 공유 화일 시스템 환경 하에서 성의하고, 이 문제를 해결할 수 있는 오류 탐지기법을 제시한다.

• Proceedings of the Korea Multimedia Society Conference
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• 2003.05b
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• pp.746-749
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• 2003

인터넷 사용자의 증가와 함께 e-mail 사용자 또한 증가하게 되면서 대량의 메일을 송수신하는 경우, 메일에 대한 효율적 관리의 중요성이 부각되고 있다. 본 논문에서는 수신된 메일의 내용을 텍스트 형태로 가져온 뒤, parallel regular expression을 이용하여 Keyword를 검색하고 추출하여 메일에 첨부되어온 멀티미디어 파일들을 자동으로 분류·저장하는 멀티미디어 첨부파일 자동분류 시스템을 제안하였다. 수신된 메일을 일일이 확인하고 분류해야만 했던 기존의 시스템과는 달리 본 논문에서 제안하고자 하는 시스템을 이용했을 경우 노력과 시간을 절감하고 첨부파일들을 효과적으로 관리할 수 있다는 장점이 있다.

• Journal of KIISE:Databases
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• v.32 no.6
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• pp.616-627
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• 2005

In the shared storage file system, systems can directly access the shared storage device through specialized data-only subnetwork unlike in the network attached file server system. In this shared-storage architecture, data consistency is maintained by some designated set of lock servers which use control network to send and receive the lock information. Furthermore, lease mechanism is introduced to cope with the control network failure. But when the control network is partitioned, participating systems can no longer make progress after the lease term expires until the network recovers. This paper addresses this limitation and proposes a method that allows partitioned systems to make progress under the partition of control network. The proposed method works in a manner that each participating system is rotationally given a predefined lease term periodically. It is also shown that the proposed mechanism always preserves data consistency.

• Journal of Digital Convergence
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• v.18 no.6
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• pp.373-378
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• 2020

For improving interoperability of medical information, health level 7 has initiated the development of a next-generation framework for the exchange of medical information called the Fast health interoperability resources (FHIR). However, there was no attempt to exchange the medical three-dimensional (3D) image with clinical data via FHIR. Thus, we designed a new method. The 3D image to be made from computed tomography was converted to the javascript object notation (JSON) file format, and clinical data was added. We made a test FHIR server, and the client used the postman. The JSON file was attached to the body, and was then transmitted. The transmitted 3D image could be seen through a web browser, and attached clinical data was identified in the source code. This is the first attempt to exchange the medical 3D image. Additional researches will be needed to develop applications or FHIR resources that apply this method.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.4 no.1
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• pp.85-102
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• 1980

Accepting the necessity for maintaining the objectives of the existing circulation system, the computer-based system could be designed by the system analyst and librarians to gain a variety of improvements in the maintenance, accessibility of circulation records and more meaningful statistical records. If the terminal can be operated on-line, then this circulation data is transmitted directly to the computer, where it may update to the circulation file immediately or alternatively be kept in direct access file for updating in batch mode. on-line system in the circulation operations is "data-collection system" and "Bar-coded label system" Bar-coded label system is simple, quick, and error-free input of data. Attached to CRT terminal is a "light pen" which is hand held and will read a bar-coded label as the pen is passed over the labels (one affixed to the book itself, other carried on the borrower cards). Instantaneously the data concerning transaction is stored in the central mini-computer. It is useful, economical for us to co-operate many libraries in Korea and design borrower's ID code, book no., classification code in the Bar-coded label system by the members of the computer center and the library staff at every stage. As for book loan, the borrowers ID code, book number and classification code are scanned by the bar-code scanner or light pen and the computer decides whether to loan and store the data. The visual display unit shows the present status of a borrowers borrowing and decides whether borrower can borrow.

• The KIPS Transactions:PartA
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• v.11A no.2
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• pp.207-212
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• 2004

In this paper, based on SCORM Sequencing Model, we propose the learning content structure which has structure informations of learning object and decision rules how to transfer learning object to learner. It is intended to provide the technical means for learning content objects to be easily shared and reused across multiple learning delivery environment. We develop the generation tool of learning object sequencing, for processing the learning with variable teaching methodologies. The teaming objects also are automatically packaged the PIE(Package Interchange File) to transmit with SCORM RTE(Run-Time Environment) and attached SCO(Sharable Content Object) function for tracking learner information.

• Journal of KIISE:Computing Practices and Letters
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• v.10 no.2
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• pp.134-145
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• 2004

With rapid growth in the amount of data transferred on the Internet, traditional storage systems have reached the limits of their capacity and performance. SAN (Storage Area Network), which connects hosts to disk with the Fibre Channel switches, provides one of the powerful solutions to scale the data storage and servers. In this environment, the maintenance of data consistency among hosts is an important issue because multiple hosts share the files on disks attached to the SAN. To preserve data consistency, each host can execute the disk I/O whenever disk read and write operations are requested. However, frequent disk I/O requests cause the deterioration of the overall performance of a SAN cluster. In this paper, we introduce a SANtopia global buffer manager to improve the performance of a SAN cluster reducing the number of disk I/Os. We describe the design and algorithms of the SANtopia global buffer manager, which provides a buffer cache sharing mechanism among the hosts in the SAN cluster. Micro-benchmark results to measure the performance of block I/O operations show that the global buffer manager achieves speed-up by the factor of 1.8-12.8 compared with the existing method using disk I/O operations. Also, File system micro-benchmark results show that SANtopia file system with the global buffer manager improves performance by the factor of 1.06 in case of directories and 1.14 in case of files compared with the file system without a global buffer manager.