• 대한기계학회논문집A
• /
• 제25권5호
• /
• pp.779-787
• /
• 2001

The multi degree of freedom system using magnetic levitation has been implemented successfully. Differently from another noncontact systems, the developed system was focused on the maximization of the system stiffness under the constraint of a limited input. The variation of a relative adopting point between the magnetic pair, its location on the fixed base, and the selection of optimal specifications for the main active magnetic elements give us another chance to realize the increased robustness against external disturbances with the less control inputs. In this paper, the overall development procedures are given including the optimal design, the dynamic modeling, the various control tests, and the main issues to be solved.

• Asia pacific journal of information systems
• /
• 제5권1호
• /
• pp.52-85
• /
• 1995

This paper develops a new approach to dealing with qualitative reasoning processes involved in managerial decisions, drawing upon choice strategies that have been developed within the general framework of multi-criteria decision making. Issues such as choices under uncertainty and preference formulation are addressed. An MCDM DSS intended to assist in high-level management decisions must focus on helping the decision maker to properly define the problem by providing a structure to it and to dynamically evaluate the alternative courses of action. A conceptual architecture is developed and presented to propose a general model for designing decision support systems specifically designed to assist in MCDM in a managerial context. A commercial loan approval judgment case is described to illustrate the real-world situation where decisions are made under fuzziness and usually require a high degree of intuition and subjective judgment. Development of a prototype system intended to partially represent application of the architecture is described.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2006년도 춘계학술대회논문집
• /
• pp.676-679
• /
• 2006

The media transport in automatic office machines such as printers, ATMs, copying machines is achieved by a complicated belt system. The system generally uses a crowning roller and belt which has been well-known for its intrinsic belt centering advantage during its operation. Since the modern office machines require precise high operating speed, stabilization of media transporting system has been one of the important issues of the machine design. Even a minor defect of the belt or the roller in the transport system directly affects its operating stability. This paper delivers a simulation technique that combines a multi-body dynamics analysis routine and a FEM based flexible continuum modeling for the efficient simulation of the flexible media transport problems.

• 융합보안논문지
• /
• 제16권4호
• /
• pp.43-51
• /
• 2016

요즘 웹 애플리케이션의 보안 취약점을 이용한 해킹과 수 많은 사이트에서 개인정보의 노출로 인한 웹 사이트의 보안 문제가 날로 증가하고 있다. 그리고 이로 인한 피해가 날로 높아지고 있어 그에 대한 대책으로 안전한 웹 사이트 제작방법이 절실히 요구되고 있는 상황이다. 이에 본 논문은 웹 사이트의 제작 시에 오픈소스 웹 애플리케이션 보안 프로젝트를 고려한 OWASP TOP 10 취약점 확인방법을 제안하였고, 제안 방법을 적용하여 보안취약점을 검증하는 방법 및 취약점 개선 후 성능에 대해 분석하였다.

• Nuclear Engineering and Technology
• /
• 제46권6호
• /
• pp.825-836
• /
• 2014

Predicting radioactive fission product (FP) behaviors in the reactor coolant system and the containment of a nuclear power plant (NPP) is one of the major concerns in the field of reactor safety, since the amount of radioactive FP released into the environment during the postulated accident sequences is one of the major regulatory issues. Radioactive FPs circulating in the primary coolant loop and released into the containment are basically in the form of gas or aerosol. In this study, a multi-component and multi-sectional analysis module for aerosol fission products has been developed based on the MAEROS model [1,2], and the aerosol transport model has been developed and verified against an analytic solution. The deposition of aerosol FPs to the surrounding structural surfaces is modeled with recent research achievements. The developed aerosol analysis model has been successfully validated against the STORM SR-11 experimental data [3], which is International Standard Problem No. 40. Future studies include the development of the resuspension, growth, and chemical reaction models of aerosol fission products.

• Perspectives in Nursing Science
• /
• 제6권1호
• /
• pp.1-20
• /
• 2009

This research examines, based on nursing's point of view, the current status and problems of the healthcare-related multi-cultural policy which is one of the major issues of contemporary Korea. Today, Korean society is facing a drastic increase of migrant workers and marriage for migration in Korea that leads to the transition to multiculturalism. Each field of society is providing prevalent supports to solve the problems of multicultural families and to promote adoption to Korean society. The activities and researches for multicultural families in nursing area were found and analyzed. 11 researches and 2 books were published. Among these 13 publications, 10 were on the marriage with immigrant women. 8 researches out of 11 (72.7%) were defined as the descriptive surveys, and 3 researches (27.3%) were defined as quasi-experimental studies. Although Korea Nurses Association (KNA) led various activities, more researches and activities by nurses and nursing scholars are required to contribute in improving the health of multicultural families.

• ETRI Journal
• /
• 제28권5호
• /
• pp.631-637
• /
• 2006

In this paper we study the optimization issues of ring networks employing novel parallel multi-granularity hierarchical optical add-drop multiplexers (OADMs). In particular, we attempt to minimize the number of control elements for the off-line case. We present an integer linear programming formulation to obtain the lower bound in optimization, and propose an efficient heuristic algorithm called global bandwidth resource assignment that is suitable for the design of large-scale OADM networks.

• JSTS:Journal of Semiconductor Technology and Science
• /
• 제16권3호
• /
• pp.293-299
• /
• 2016

Recently, as IoT (Internet of Things) becomes more important, low cost implementation of sensor nodes also becomes critical issues for two well-known standards, IEEE 802.15.4 and IEEE 802.15.6 which stands for WPAN (Wireless Personal Area Network) and WBAN (Wireless Body Area Network), respectively. This paper presents the area-optimized AES-CCM (Advanced Encryption Standard - Counter with CBC-MAC) hardware security engine which can support both IEEE 802.15.4 and IEEE 802.15.6 standards. First, for the low cost design, we propose the 8-bit AES encryption core with the S-box that consists of fully combinational logic based on composite field arithmetic. We also exploit the toggle method to reduce the complexity of design further by reusing the AES core for performing two operation mode of AES-CCM. The implementation results show that the total gate count of proposed AES-CCM security engine can be reduced by up to 42.5% compared to the conventional design.

• Journal of Information Processing Systems
• /
• 제7권1호
• /
• pp.187-198
• /
• 2011

User authentication refers to user identification based on something a user knows, something a user has, something a user is or something the user does; it can also take place based on a combination of two or more of such factors. With the increasingly diverse risks in online environments, user authentication methods are also becoming more diversified. This research analyzes user authentication methods being used in various online environments, such as web portals, electronic transactions, financial services and e-government, to identify the characteristics and issues of such authentication methods in order to present a user authentication level system model suitable for different online services. The results of our method are confirmed through a risk assessment and we verify its safety using the testing method presented in OWASP and NIST SP800-63.

• Journal of Information Technology Applications and Management
• /
• 제20권3호
• /
• pp.61-78
• /
• 2013

This study was initiated to inquire as to why Wal-Mart failed in the Korean market. For multi-national corporations, environmental differences such as cultural and social differences among countries require business strategies to vary country by country. In Korea, Confucian Ethics are penetrated in every aspect of people's lives. An important aspect of Confucian Ethics is the role and responsibility of women in society. Considering this, businesses need to understand Korean women's preferences as consumers and develop business strategies accordingly. This study emphasizes that IS strategy is one component of the business strategy and, as such, must be rooted in business issues. Understanding that IS strategy should fit to national contexts, this study investigates the underlying process in which IT-based strategic capability is developed according to national context to gain competitive advantages.