• Journal of Ocean Engineering and Technology
• /
• v.34 no.2
• /
• pp.55-65
• /
• 2020

A review of the 2nd generation of intact stability by the International Maritime Organization is performed. The main issues with the new stability criteria are reviewed. In particular, the physical background and related mathematical formulations of the pure loss of stability and parametric roll are summarized. Based on a literature review, benchmark calculation results for 17 different types of ships are discussed, and the final results are in excellent agreement with our physical expectations. Some relatively serious design problems are found in the application of the new stability criteria to sample ships built in Korea, and possible technical solutions are proposed, which have to be improved in the coming years.

• Proceedings of the KIEE Conference
• /
• 2008.10c
• /
• pp.208-210
• /
• 2008

LRT System Application Project is performed for the purpose of technical advancement and stabilization of K-AGT system from the viewpoint of practical use and commercialization. For those purpose, the performance test and evaluation procedure for K-AGT signaling system are developed, and the scheme of verifying the performance and function of signaling system under multi-train and driverless control environment is being conducted. For the multi-train operation in K-AGT test track, we applied the regenerative energy storage system in addition to the existing electric facilities. This paper present the design, manufacturing, and testing results of regenerative energy storage system.

• Proceedings of the Korean Information Science Society Conference
• /
• 2006.06a
• /
• pp.256-258
• /
• 2006

최근 본격적인 지상파 디지털 방송 서비스가 급속히 확산되면서 케이블 TV와 지상파 TV에 공통으로 사용되는 셋탑박스(settop-box)개발이 활발히 이루어지고 있다. 또한 이러한 셋탑박스를 검증할 수 있는 검증 어플리케이션의 필요성이 증가하고 있다. 따라서 본 논문에서는 지상파 TV와 케이블 TV에 공용으로 사용되는 디지털 셋탑박스(settop-box)가 ACAP과 OCAP 미들웨어 표준에 따라 개발되었는지 여부를 검증할 수 있는 어플리케이션을 설계하고 구현한다. 이 검증 어플리케이션은 ACAP과 OCAP 표준에 명시된 자바 API를 셋탑박스에서 제공하는지 여부와 올바른 필수 기능의 구현 여부를 검증할 수 있다. 그리고 실험을 통하여 본 논문에서 구현한 검증 어플리케이션을 사용하면 OCAP 표준의 경우 99%, ACAP표준의 경우 95%를 검증할 수 있다는 것을 알 수 있었다.

• Journal of the Korean Society for Library and Information Science
• /
• v.25
• /
• pp.325-341
• /
• 1993

The experimental method, when carried out properly, is the most powerful way of seeking answers to research questions. The purpose of this study is to provide practical and theoretical insights as well as to discuss technical skills needed to design and implement the experimental research in library and information science. The levels of empirical research methods, the logic and types of the experimental designs, the application status of the experimental methods through content analysis of the published papers, and strategies to plan the research and to collect and analyze data are examined. This study also brings suggestions how experimental research can be made more meaningful and puts emphasis on the need of the research method education in library and information science field.

• Fashion & Textile Research Journal
• /
• v.14 no.1
• /
• pp.144-151
• /
• 2012

The patent application state of Europe, U.S.A, and Korea was analyzed to grasp the technology development trends and to suggest a direction for research development of health related shoes. Europe has high concentration of patent activity in corrective treatment, while Korea has high concentration in fitness and U.S.A in diet related fields. Numerous shape and structure designs were done to have the effect of corrective treatment. Adding weight to shoes has been used to create diet-effect, but it suggests a lack of technical methods to increase weight effectively. For fitness effect, variation of shape and structure of the outsole are often used.

• Journal of Energy Engineering
• /
• v.28 no.4
• /
• pp.13-18
• /
• 2019

The high energy penalty in amine-based post-combustion CO₂ capture process is hampering its industrial scale application. An advanced process is designed by intensive heat integration within the conventional process to reduce the stripper duty. The study presents the technical feasibility for stripper duty reduction by intensive heat integration in CO₂ capture process. A rigorous rate-based model has been used in Aspen Plus® to simulate conventional and advanced process for a 300 MW coal-based power plant. Several design and operational parameters like split ratio, stripper inter-heater location and flowrate were studied to find the optimum values. The results show that advanced configuration with heat integration can reduces the stripper heat by 14%.

• Transactions of the Korean Society of Automotive Engineers
• /
• v.10 no.6
• /
• pp.166-170
• /
• 2002

A hybrid structure composed of magnesium and steel is Instrument Panel structure used for the basement of cockpit module components. For that reason, A hybrid structure has to be designed for satisfying components assembly design facility and styling. There are various models of If like steel structure assembly, however having been applied normally, but magnesium structure assembly selected far saving weight down. This paper introduces a hybrid structure having advantages between steel and magnesium structure and presents a CAE technical solution based on a development project. furthermore, it provides desired direction of the future development is suggested.

• 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.

• 연구논문집
• /
• s.30
• /
• pp.129-135
• /
• 2000

Double boss type composite pressure bottles have been developed widely but single boss type had not because there are some difficulty in technical point. In this paper a research was performed to develop composite pressure vessel in conjunction with design, fabrication, and test. Fiber pattern and angles were decided by CADFIL software and they are [liner/$15^{\circ}$/$15^{\circ}$/$90^{\circ}$/$18^{\circ}$/$90^{\circ}$/$21^{\circ}$/$21^{\circ}$/$90^{\circ}$]. Fabrication of bottles was done by AEA's 5-axis filament winding machine. During fabrication fiber optic sensor were embedded to measure were behavior of structure at the applied internal pressure. Even though satisfied test results were not obtained, the experimental set-up of fiber optics showed the possibility for the application of filament wound vessels. However, the conventional strain and fabrication of single boss composite bottles.

• Journal of the Korean Society of Systems Engineering
• /
• v.1 no.2
• /
• pp.34-42
• /
• 2005

Logistic Support Analysis(LSA) and Logistic Supportability Review must be carried out as soon as possible in development stage in order to minimize operation/maintenance cost that head the list of weapon cost and improve logistic supportability of the weapon system. And the result must be used for hardware designs to set up to be able to input to the system design and logistic support elements. Therefore Logistic Support Elements must be planed/developed/supplied with the main combat system concurrently and performance and logistic supportability of the comabat system had better be improved mutually. This report describes maintenance concept changes of weapon systems, fault diagnosis function and test equipment state on the domestic MBT(main battle tank). And then it presents application and intensification of itself fault diagnosis system for a domestic future MBT considering connection with IETM(Interactive Electronic Technical Manual) and TE(Test Equipment).