• Journal of Applied Tourism Food and Beverage Management and Research
• /
• v.11
• /
• pp.135-135
• /
• 2000

The financial performance over the twenty four-year period (1968-1991) was analyzed with respect to six performance measures : current ratio, net sales to working capital for liquidity, total liabilities to net worth for solvency, asset turnover for activity, return on assets for profitability, and cost of operations for operating. Interesting enough, small size hotel companies have enjoyed great profitability while relatively big hotel companies have fallen under the average. Further, after a certain level of firm size, the costs of operations increase, not decrease, as plant size increase. This results lead to a conclusion that getting bigger is not always good financial decision.

• Journal of Korean Library and Information Science Society
• /
• v.35 no.2
• /
• pp.11-30
• /
• 2004

The purpose of this study is to review current issues in practices of acquisition, organization and access to the web resources operating at libraries. Literature reviews were conducted to analyze patterns of access to the web resources, such as electronic journals, bibliographic databases and web sites used at libraries. Also analyzed was information seeking behaviors of researchers how they access to web resources.

• Journal of Korean Society for Quality Management
• /
• v.40 no.3
• /
• pp.415-425
• /
• 2012

Purpose: ISO 26000 is a newly emerging international standard for corporate social responsibility. This paper aims to derive core subjects of primary concern when introducing and practicing corporate social responsibility. Methods: Perceived performance and importance levels on core subjects in ISO 26000 are investigated, and a survey is conducted from members of organizations having published CSR reports. Frequency analysis, analysis of variance, cross tabulation and IP analysis are used to analyze surveyed data. Results: Items to be improved with high emphasis among 7 core subjects in ISO 26000 are organizational governance for public and private service sectors, fair operating practices for industrial goods manufacturing sectors, and organizational governance and environment for consumer goods manufacturing sectors. Human rights and labor practice are perceived as having high performances in comparison with importance. Conclusion: Organizations should find ways to build social responsibility into their governance systems and procedures with high priority.

• Journal of KIISE:Computing Practices and Letters
• /
• v.7 no.6
• /
• pp.715-723
• /
• 2001

This paper is a proposal of the world-wide messaging system for supporting wireless internet messaging against the existing system which has many limits on functionality and structure. To this work, this paper proposes the hierarchical structure to ensure an extensibility of an existing messaging system, and show the possibility via implementing and operating together wireless units.

• The Transactions of the Korean Institute of Electrical Engineers P
• /
• v.63 no.4
• /
• pp.322-326
• /
• 2014

Recently, the LOE(loss of excitation) incidents are occurred in domestic synchronous generator frequently, the synchronous generator protection system has been much attention for the LOE protection of the incidents that threats synchronous generators and power systems. This paper was showed the characteristics and practices of distance relay that widely used LOE protection relaying in generator. Firstly, the operating characteristics and the impedance locus for LOE of the generator protection were introduced. Even if the conventional simulation program is used for modeling, but it is difficult to implement a LOE modeling and simulation of synchronous generator. So, the LOE relay operation data collected from thermal power plant and nuclear power plant in real fields were analyzed. By reviewing the applications of GE Mho relays, the reliability of LOE for synchronous generator protection in domestic were improved.

• Journal of the Korea Society of Computer and Information
• /
• v.21 no.9
• /
• pp.149-156
• /
• 2016

This paper is concerned with education courses operating practices for basic computer literacy training. In this study, we propose an example for students to effectively measure and evaluate the achievement of defined ability in the performance measurement and analysis, learning objectives and learning outcomes set in operation throughout the course. Through research and development use case presents the tools for teaching method and effective and objective measurement of the related subjects. And based on the results, we propose the possibility of utilizing NCS-based course operation and education certification. In this study, the measurement process is based on the association with the objective of the development and operation, and measurement tools, measuring tools for measuring learning outcomes associated with the curriculum design methods for the measurement and evaluation of the case of the operation of the course units of learning outcomes and the method proposed.

• The Transactions of the Korean Institute of Electrical Engineers P
• /
• v.55 no.2
• /
• pp.78-82
• /
• 2006

This paper is proposed genetic algorithm tuning(GAT) control)or for high performance of induction motor drive. We employed GA to the classical PI controller. The approach having ability for global optimization and with good robustness, is expected to overcome some weakness of conventional approaches and to be more acceptable for industrial practices. The control performance of the GAT PI controller is evaluated by analysis for various operating conditions. The results of experiment prove that the proposed control system has strong high performance and robustness to parameter variation, and steady-state accuracy and transient response.

• Journal of KIISE:Computing Practices and Letters
• /
• v.5 no.2
• /
• pp.236-246
• /
• 1999

최근 운영체제 개발분야에서 마이크로커널 설계 기술이 새로운 경향으로 부각되고 있다. 마이크로커널은 기존의 모노리딕 커널과 상이한 구조를 가지고 있으므로, 성능분석 튜닝을 위하여 새로운 도구를 필요로 한다. 본 논문에서는 마이크로커널 기반 운영체제를 위한 성능 측정도구 MKperf의 개발에 관하여 기술하고자 한다. MLperf 는 마이크로커널 r조의 성능에 중요한 영향을 미치는 문맥 교환과 원격 프로시저 호출을 추적할수 있다. 뿐만 아니라 , 캐시와 TLB와 같이 메모리 성능에 결정적인 영향을 미치는 다양한 하드웨어 성능요소들을 측정할수 있다. MDperf 의 이러한 측정 기능은 마이크로커널 기반 운영체제 성능을 정량적으로 분석하는데에 유용하게 사용될 수있다.

• Proceedings of the KIEE Conference
• /
• 2005.10c
• /
• pp.202-204
• /
• 2005

This paper is proposed genetic algorithm tuning(GAT) controller for high performance of induction motor drive. We employed GA to the classical PI controller. The approach having ability for global optimization and with good robustness, is expected to overcome some weakness of conventional approaches and to be more acceptable for industrial practices. The control performance of the GAT PI controller is evaluated by analysis for various operating conditions. The results of experiment prove that the proposed control system has strong high performance and robustness to parameter variation, and steady-state accuracy and transient response.

• Journal of Korea Water Resources Association
• /
• v.40 no.11
• /
• pp.877-886
• /
• 2007

An urban drainage system consists of two major systems : flood drainage facilities and operating practices. The facilities are composed of sewer networks, gates, and pumping stations and the operating practice consists of pump or gate operation. Then, a real time simulation system which is able to simulate urban runoff and the pump operation and to consider the backwater effect is required to operate efficiently the pump. With this system, the efficient pump operating rule can be developed to diminish the possible flood damage on urban areas. In this study, a real time simulation system was developed using the SWMM 5.0 DLL and Visual Basic 6.0 equipped with EXCEL. Also, for developing efficient pump operating Rules, two new Rules were suggested. The first Rule is designed to operate pumps considering the condition of sewer networks such as depths of each junction. The second is to discharge all the amount of inflow at each time step. Results obtained by those Rules were compared with one by the current pump operating Rule which is able to consider only the depth of the retard basin. The developed model was applied to Joonggok retard basin and verified their applicability.