• Korean Journal of Remote Sensing
• /
• v.34 no.5
• /
• pp.801-810
• /
• 2018

Ship monitoring using satellite synthetic aperture radar (SAR) images consists of ship detection, ship discrimination, and ship classification. A large number of methods have been proposed to improve the detection and discrimination capabilities, while only a few studies exist for ship classification. Thus, many studies for the ship classification are needed to construct ship monitoring system having high performance. Note that constructing database (DB), which contains both SAR images and labels of various ships, is important for research on the ship classification. In the airborne SAR classification, many methods have been developed using moving and stationary target acquisition and recognition (MSTAR) DB. However, there has been no publicly available DB for research on the ship classification using satellite SAR images. Recently, Shanghai Key Laboratory has constructed OpenSARShip DB using both SAR images of various ships generated from Sentinel-1 satellite of European Space Agency (ESA) and automatic identification system (AIS) information. Thus, the applicability of OpenSARShip DB for ship classification should be investigated by using the concepts of airborne SAR classification which have shown high performances. In this study, ship classification using satellite SAR images are conducted by applying the concepts of airborne SAR classification to OpenSARShip DB, and then the applicability of OpenSARShip DB is investigated by analyzing the classification performances.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2014.04a
• /
• pp.81-82
• /
• 2014

윈도우나 리눅스 등의 일반적인 파일 시스템은 데이터를 로컬 저장 장치에 직접 저장하고 관리하기 때문에 대용량 저장 공간을 기반으로 운영된다. 반면에, 클라우딩을 위한 가상 파일 시스템은 데이터를 로컬 저장 장치에 직접 저장하는 경우보다는 지역적으로 분산된 데이터에 대한 지시자만을 관리하는 경우가 더 많다. 이 연구에서는 소규모 클라우딩 환경에서 파일 시스템의 디렉터리 체계를 DB로 유지하면서 모든 데이터 파일들은 지시자로만 관리하는 유닉스 파일 시스템 스타일의 가상 파일 시스템을 설계하여 제안한다. 시험 결과, 트리 구조의 디렉터리 체계가 의도대로 이루어짐이 확인되었다.

• Proceedings of the Korean Information Science Society Conference
• /
• 1999.10a
• /
• pp.156-158
• /
• 1999

본 연구에서는 광양제철소의 Coke 공장에서 이동중인 압출기로부터 프로세스 데이터를 원격 수집하기 위한 무선 LAN 시스템을 구축하였으며, 압출 저항 데이터를 저장 관리할 수 있는 DB를 구축하여 얻어진 데이터를 비교 분석하여 Coke Oven의 노체의 손실여부를 예측하여 유지 보수하거나 손실을 최소화하기 위한 조업 조건 도출에 활용하기 위한 시스템을 개발하였다. 본 시스템은 이동중인 압출기에 설치된 압출 저항 측정 시스템과 2.4 GHz의 대역폭을 갖는 무선 LAN을 이용한 데이터 송수신 시스템과 수신한 데이터를 감시, 저장, 비교 분석하기 위한 MMI 및 DB Server 시스템으로 구성되어 있다.

• Journal of the Institute of Electronics Engineers of Korea TC
• /
• v.45 no.2
• /
• pp.127-136
• /
• 2008

This paper proposes the efficient system for automatic design of FSS(Frequency Selective Surface) with periodic pattern and frequency characteristics specified by operator. The proposed system derives optimal design parameters through tool for analysis of FSS with arbitrary pattern, DB(Data Base) implemented from limited simulation and measurement data of FSS, and GA(Genetic Algorithm) for optimizing design parameters. FSS analysis tool consists of two analysis tools. One is the simulator for analysis of monolayer FSS that using moment method, another is the tool with approximated analysis method of FSS with dielectric layer. Given pattern configuration and characteristics specified by operators, the DB system searches the best matching FSS, and provides initial genes to GA from the searched parameters, which drastically reduces running time of GA for finding the FSS design parameters. In this paper, the proposed design system is verified through simulation and measurement about FSS with various patterns.

• The Transactions of the Korea Information Processing Society
• /
• v.3 no.3
• /
• pp.417-428
• /
• 1996

In this paper, a database interface system with natural language dialogue is designed and implemented. The system is made up of language analysis, context processing, dialogue processing and DB processing unit. The method for classifying and processing an undefined word in language analysis is proposed. It reduces the dictionary size, which gives difficulties in DB Interface. And the current DB Interfaces dealt with an input utterance independently. But the system in this paper provides a user with the interface environment in which he or she can have a continuous conversation with the system and retrieve DB information. Thus in this paper, speech acts which include user's inattentions well as propositional contents are defined, and user action hierarchical model for library DB retrieval is constructed. And the system uses the defined knowledge to recognize-user's plan, effectively understanding and managing the ongoing dialogue. And the system is implemented in the domain of library database in order to prove the proposed methods in this paper.

• Journal of Platform Technology
• /
• v.11 no.5
• /
• pp.49-58
• /
• 2023

Factory energy management system is rapidly growing and evolving due to factors such as the 3rd Basic Energy Plan and global energy cost increases, as well as environmental issues. However, implementing an essential data collection system for energy management in factory settings, which have limited space and unique characteristics, presents spatial, environmental, and energy-related challenges. This paper endeavors to mitigate these challenges by devising a data collection system implemented through an edge-based lightweight platform. A comparison and evaluation of database operation on edge devices are conducted. To conduct the evaluation, a benchmarking tool called CDI Benchmark is developed, utilizing the characteristics of existing factories involved in practical applications. The evaluation results revealed that RDBMS systems like MySQL encountered errors in the database due to high data insertion loads, making them inoperable. On the other hand, InfluxDB, thanks to its highly efficient compression algorithm, demonstrated compression rates about 6 times higher than MyRocks according to the evaluation. However, it was observed that MyRocks outperformed InfluxDB by a significant margin, recording a maximum processing time approximately 80 times faster compared to InfluxDB.

• Journal of Korean Society of Archives and Records Management
• /
• v.14 no.3
• /
• pp.7-32
• /
• 2014

The objective of this research is to seek a preservation method against the set of data. To achieve this purpose, this study analyzed the MIDAS RASIS RI/ RG of the Nuclear Safety and Security Commission, and then followed it with the under analysis of the MIDAS RASIS, thus presenting the transfer process. This was conducted for the records management of the MIDAS RASIS-designed records management modules DB. For the records management of MADIS RASIS, the records management module DB was thus planned, which presented the transfers through the standard records management system.

• Journal of Information Technology and Architecture
• /
• v.11 no.2
• /
• pp.225-233
• /
• 2014

In this paper an architecture for 3D audio core algorithm evaluation database system. Due to increase of 3D audio system through multimedia device, an evaluation system is required for evaluating the 3D core algorithms for developing 3D audio system. Conventional evaluation systems have some problems. Researchers have to learn usage of evaluation system, in addition it is inefficient to use and search audio sources because audio sources are not indexed in general. To solve these problems, we design the architecture of 3D audio core algorithm evaluation database system enabling to automatically evaluate core algorithms using database management system. Also we define XML metadata scheme for information of saved audio source in database. This approach allows improving efficiency of search audio source and use of audio database.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.24 no.2
• /
• pp.397-409
• /
• 2014

According to the Personal Information Protection Act(PIPA) which is legislated in March 2011, the individual or company that handles personal information, called Personal information processor, should encrypt some kinds of personal information kept in his Database. For convenience sake we call it DB Encryption in this paper. Law enforcement and the implementation agency accordingly are being strengthen the supervision that the status of DB Encryption is being properly applied and implemented as the PIPA. However, the process of DB Encryption is very complicate and difficult as well as there are many factors to consider in reality. For example, there are so many considerations and requirements in the process of DB Encryption like pre-analysis and design, real application and test, etc.. And also there are surely points to be considered in related system components, business process and time and costs. Like this, although there are plenty of factors significantly associated with DB Encryption, yet more concrete and realistic validation entry seems somewhat lacking. In this paper, we propose a realistic DB Encryption Assurance Framework that it is acceptable and resonable in the performance of the PIPA duty (the aspect of the individual or company) and standard direction of inspection and verification of DB Encryption (the aspect of law enforcement).

• Journal of Internet Computing and Services
• /
• v.2 no.5
• /
• pp.41-47
• /
• 2001

This paper deals with an EJB-based database agent(component) used to define workflow processes, which is a core function of the e-Chautauqua workflow management system that is an on-going research product. We describe about how to design and implement the EJB-based DB agent that is deployed on EJB server as a component. The agent is located between the build-time clients and the database system, and manages database accesses, such as retrieves and stores, from the workflow definition components. Through the EJB technology, we are able to accomplish a stable database agent that can be characterized by the distributed object management, reliable recovery mechanism from system failovers, reliable large-scale transaction management, and the security functions.