• Journal of Information Technology Services
• /
• v.7 no.3
• /
• pp.239-252
• /
• 2008

Since EA includes huge information of a company, it takes long time and high cost for company's employees to search for what they need. We try to make the foundation to solve this problem by using ontology technology based on semantic web. In this paper, we try to verify efficiency of EA ontology by developing ontology for Business Enterprise Architecture(BEA). The purpose of this paper is to develop BEA ontology to provide new information by reasoner and to discover new relations between matadata by using extracted information and data. The EA ontology we developed will provide the new way of access and use for companies. The experience of ontology development will help EA ontology development in various domains. In the future, the development of other EAs which has more information resources will help to solve problems for interoperability between different EAs.

• Journal of Korea Society of Digital Industry and Information Management
• /
• v.8 no.2
• /
• pp.177-188
• /
• 2012

GIS provides the various analyzing and displaying using diverse spatial data have supported the powerful functionality and friendly user-interface. But, early GIS software is developed as package tool, it have many difficulties with reducing the cost of developing GPS application and satisfying the various user requirements. At present, the developed GPS applications across multiple domains, despite the common features are built separately for each domain in terms of software engineering development followed out waste of time and money expenditure. However, common features between GPS applications, if deployed as a component assembly and reuse components in terms of enabling the two kinds of component-based development can bring out the beneficial results. In this paper, we described the Analysis and design of GPS ApplicationsS based on Component. Each GPS component is composed of many objects accomplish the atomic service processing and cooperate with each other. And, GPS components meets the qualifications of thc low cost of developing GPS application because of the reusability and re-composition.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.8 no.4
• /
• pp.1292-1306
• /
• 2014

This paper proposes a space-polarization division multiple access (SPDMA) system that has limited feedback channels. The system simultaneously serves data streams to multiple mobile users through dual-polarized antenna arrays, by using pre-determined sets of precoding vectors that are orthogonal in both space and polarization domains. To this end, a codebook whose elements are sets of the precoding vectors is systematically designed based on the discrete Fourier transform (DFT) matrix and considering the power imbalance of polarized channels. Throughput of the SPDMA system is evaluated and compared to that of space division multiple access (SDMA) system, according to the various parameters including cross polarization discrimination (XPD). The results show that the throughput of SPDMA system outperforms that of SDMA in the environments of high XPD with many mobile users.

• KSCI Review
• /
• v.12 no.1
• /
• pp.9-19
• /
• 2004

This paper proposes ACA (Adaptive Component Analysis) as a method for feature extraction and analysis of the content-based image retrieval system. For satisfactory retrieval, the features extracted from images should be appropriately applied according to the image domains and for this. retrieval measurement is Proposed in this study. Retrieval measurement is a standard indicating how important the value of a relevant feature is to image retrieval ACA is a middle stage for content-based image retrieval and it purposes to improve the retrieval speed and performance.

• Proceedings of the CALSEC Conference
• /
• 2003.09a
• /
• pp.218-223
• /
• 2003

UDDI is the open standard for distributed Web-based registry standard which supports registrations and discoveries of Web services. Recently, UDDI version 3.0 specifications were opened by OASIS UDDI Spec, technical committee. UDDI version 3.0 supports many useful functions, which are not supported in version 2.0 specification, such as nested query, enhanced find qualifiers, digital signatures subscription, etc. Despite of its merits, complexity of the standard and backward-compatibility support makes it difficult to adopt this standard in real application domains. In this paper, we develop the Registry server which support UDDI version 3.0 standard. This server is based on common RDBMS and it supports all functions of UDDI version 3.0 including backward-compatibility with version 2.0 API, XML digital signature and URI- based key schemes.

• Journal of the Chungcheong Mathematical Society
• /
• v.21 no.2
• /
• pp.259-268
• /
• 2008

To the design of secret key, there are two types of basic approaches called the tame approach and the wild approach. In the tame approach we try to use only simple primitives such as linear feedback shift registers and to prove mathematical theorems about their cryptographic properties. In the wild approach we try to use crazy compositions of operations which mix a variety of domains in a nonlinear and nonalgebraic way. There are several papers which try to bridge this gap by considering semi-wild constructions. A T-function on n-bit words plays an important role in semi-wild constructions. In this paper we study the invertibility and the period of some T-functions. Especially we characterize some polynomials which has a single cycle property.

• Proceedings of the Korean Information Science Society Conference
• /
• 2003.04a
• /
• pp.863-865
• /
• 2003

교육정보화의 실현이라는 과제가 현재의 학교현장에 필요한 만큼 제7차 교육과정의 시작과 더불어 학습자의 지식과 능력을 육성하기 위한 미리 계획된 WBI(Web based Instruction)를 기반으로 한 교수 모형의 필요성이 강조된다. 본 연구는 WBI의 교육적 기능을 충분히 반영하여 교실에서 교사가 사용하기 쉽고 효율적인 학습자료를 구현하여 웹 환경이 조성된 교실에서 활용할 수 있도록 하였다. 이러한 구현을 위한 프로그램으로는 웹 환경에서 실행하는데 무리가 없고 소용량으로 에니메이션 효과를 극대화 할 수 있는 Flash MX를 사용하였고, 고등학교 ‘수학10-나’의 내용 중 교과서와 칠판만을 사용하여 수업하는 데는 한계가 있는 과정인 ‘도형의 이동과 부등식의 영역’을 주로 개발하였다. 학습자들은 학교에서 수업한 내용을 웹 환경을 이용하여 개별학습 및 반복학습을 할 수 있고, 교사들은 교실이나 멀티미디어실에서 웹을 통하여 본 연구에서 구현한 프로그램을 사용함으로 학교 수업의 효율성을 높이고자 한다.

• Journal of the Korean Society for Precision Engineering
• /
• v.11 no.4
• /
• pp.13-25
• /
• 1994

In order to design and improve a new machine tool, there is a need for a better understanding of the cutting force. In this paper, the computer programs were developed to predict not only the mean specific cutting pressure but also the cutting force. The simulated cutting forces in X, Y, Z directions resulted form the developed cutting force model were compared with the measured cutting forces in the time and frequency domains. The simulated cutting forces resulted from the new cutting force model have a good agreement with the measured force in comparison with these resulted from the existing cutting force model.

• Proceedings of the KSME Conference
• /
• 2001.06b
• /
• pp.694-699
• /
• 2001

This paper presents a control of active suspension system for quarter-car model with two-degree-of-freedom using $H_{inf}$ and nonlinear adaptive robust control method. Suspension dynamics is linear and treated by $H_{inf}$ method which guarantees the robustness of closed loop system under the presence of uncertainties and minimizes the effect of road disturbance to system. An Adaptive Robust Control (ARC) technique is used to design a force controller such that it is robust against actuator uncertainties. Simulation results are given for both frequency and time domains to verify the effectiveness of the designed controllers.

• Journal of the Korea Society of Computer and Information
• /
• v.23 no.12
• /
• pp.65-72
• /
• 2018

In this paper, we have studied how to reuse common data link software by applying software product line engineering. Existing common data link software performed different stages of design, implementation, and testing without sharing the accumulated knowledge of different developers. In this situation, developers agreed that sharing the assets of each project and reusing the previously developed software would save human and time costs. Even with the initial difficulties, the common Data Link is a continually proposed project in the defense industry, so we decided to build a product line. The common data link software can be divided into two domains. Among them, the initial feature model for the GUI software was constructed, and the following procedure was studied. Through this, we propose a plan to build a product line for core assets and reuse them in newly developed projects.