• The Transactions of the Korean Institute of Power Electronics
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• v.12 no.2
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• pp.149-156
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• 2007

The number of transformer and the size of transformer in inverter using 3-phase transformer could be reduced compare with a multi-level inverter using single phase transformer. but still the 3-phase transformer inverter needs many switches. In this study, we proposed the isolated multi-level inverter using 3-phase transformers and common arm, in this paper. Also, using phase angle control method with switching frequency equal to output fundamental frequency, harmonics component of output voltage and switching loss can be reduced. Finally, We tested multi-level inverter to clarify electric circuit md reasonableness through Matlab simulation and experiment by using prototype inverter.

• Journal of the Architectural Institute of Korea Planning & Design
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• v.34 no.4
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• pp.45-55
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• 2018

The purpose of this study is to analyze common features and methodological differences of PN-spatial characteristics found in architectural theories and works of contemporary young architects in Japan, such as Sou Fujimoto, Yo shimada, Keisuke Maeda and Junya Ishigami. These architects have paid attention to space between nature and inner space and have tried to establish their own architectural theory on that. Such space is ambiguous and PN-spatial in a way that it has features of both nature and inner space. Ambiguousness is a characteristic of modern architecture and PN-spatial characteristics are one of the features of Japanese architecture. This study aims to analyze the architectural theories and works of contemporary young architects in Japan from the perspective of PN-space and to draw methodological differences and common features. Their theories and works have common features in terms of 'ambiguous spatial boundary', 'unregulated spatial territory', 'detoured circulation' and 'architectural motifs', but each has their own methodology. To sum up, the works and theories of the Japanese young architects contain the philosophy and discourse of modern architecture in general. To be sure, they clearly have characteristics of Japanese architecture, which needs to be studied constantly.

• Journal of Korean Academic Society of Home Health Care Nursing
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• v.12 no.1
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• pp.92-116
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• 2005

Purpose: This study was a predicative survey to provide home care clients with indwelling urinary catheters for furnishing basic educational material to their families by analyzing the family members' knowledge, educational needs and educational experience about indwelling catheter management. Method : The subjects consisted of 108 family members who cared for home care clients with indwelling catheters. Data were collected by home care nurses in nine hospitals in Pusan, who directly interviewed with them through questionnaires from Sep. 6th to 30th in 2004. The questionnaires for data collection were developed through pre-survey and reference review. The collected data was analyzed by using frequency, percentile, mean, variation, t-test, ANOVA on SPSS 10.1 package. Results : There were characters of home care clients with indwelling catheters: women(67.6%) were more than men; the average age of them was $69.60{\pm}14.99$ years old; neurogenic and cerebrovascular diseases(80.0%) were the most common disease group; 81.5% of them were totally dependent on others in terms of level of activity. Home care clients' families had these characters: women(76.9%) were more than men; the average age was $54.5{\pm}13.70$ years old; 46.3% of them were parents or sons or daughters in terms of relation with patient; tl1e average care period was $39.8{pm}34.20$ months. Level of knowledge about indwelling catheter management of the family members were 69.8% and its mean were $20.24{\pm}4.53$. Educational needs were 90.9% and its mean were $14.55{\pm}3.56$. Educational experience were 53.3% and its mean were $8.53{\pm}4.30$. 'Complications in using an indwelling catheter', 'Symptoms to call for a home care nurse' and 'Method to attach an indwelling catheter' were high ranked in both educational needs and educational experience. 'Anatomy of urinary tract', 'Functions of urinary tract' and 'Catheter placement' were low ranked in both educational needs and educational experience Level of knowledge about indwelling catheter management of the families showed a significant difference according to their age(F=5.35, p=0.01). Educational needs showed a significant difference according to care period(F=3.06, p=0.04). Conclusion: the family members' level of knowledge and educational experience about indwelling catheter management and their educational were not sufficient while their educational needs were high. In other words although the family members were acknowledged education needs, but the care for the patients with indwelling catheter weren't performed well because of their lack of related knowledge. Therefore systematic educational programs about indwelling catheter management for home care clients and their families should be made on the base of this study.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.6
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• pp.2933-2934
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• 2014

Involvement of a multidisciplinary team in cancer care may have added benefits over the existing system of patient management. A paradigm shift in the current patient management would allow more focus on nutritional support, in addition to clinical care. Malnutrition, a common problem in cancer patients, needs special attention from the early days of cancer care to improve quality of life and treatment outcomes. Patient management teams with trained oncology dietitians may provide quality personalized nutritional care to cancer patients.

• Journal of information and communication convergence engineering
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• v.1 no.4
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• pp.213-216
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• 2003

A VPN is widely used in a communications environment which access is controlled to permit peer connections only within a defined community of interest. It is constructed through some form of partitioning of a common underlying communication medium, where this underlying communications medium provides services to the network on a non-exclusive basis. In this paper, we have analyzed a variety of architecture to implement Giga bps VPN system. The proposed architecture will satisfy the needs of clients who adopt Giga bps VPN system in the various environments.

• Journal of information and communication convergence engineering
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• v.8 no.5
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• pp.544-548
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• 2010

The Enterprise Security Management system is a centralized control system based on predefined security policies by organizations. In Korea, there is a Common Criteria security certification according to the strict standards for various features. As the needs of information security product are increasing, the ESM system should be evaluated with quality characteristics. In this paper, we propose evaluation items for functionality and performance of Enterprise Security Management system, and the best practices for evaluation.

• Proceedings of the IEEK Conference
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• summer
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• pp.321-324
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• 2004

A VPN is widely used in a communications environment which access is controlled to permit peer connections only within a defined community of interest. It is constructed through some form of partitioning of a common underlying communication medium, where this underlying communications medium provides services to the network on a non-exclusive basis. In this paper, we have analyzed a variety of architecture to implement Giga bps VPN system. The proposed architecture will satisfy the needs of clients who adopt Giga bps VPN system in the various environments.

• Bulletin of the Society of Naval Architects of Korea
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• v.18 no.4
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• pp.31-40
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• 1981

Nowadays we needs the ship design ability strongly for our shipbuilding industry to attain the 2nd position among the competitive world marine industries. But we have short experience in ship design, so several ship design terminologies are used without clear understandings. Here, papers on ship design procedure and design methodology are summarized with some investigation about our present status. In addition, the state arts and new developments of Computer Aided ship Design in advanced ship building countries are treated. It is hoped that we-ship designers of our country-do have common understandings about the ship design terminologies.

• Bulletin of Korea Environmental Preservation Association
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• v.26 no.9_10
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• pp.8-10
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• 2004

1987년 3월 세계환경개발위원회에서 발간한 일명 '브룬트란트 보고서' 라고 불리우는 보고서 "우리 공동의 미래(Our Common Future)"에서 "지속가능한 발전"개념이 제시되었다. 보고서에 제시된 지속가능한 발전이란 '미래세대가 그들의 필요를 충족시킬 능력을 저해하지 않으면서 현 세대의 필요를 충족시키는 것'(원문 : Sustainable development is development that meets the meeds of present without compromising the ability of future generations to meet their own needs)으로 이해되고 있다. 이러한 개념적인 지속가능한 발전을 실현시키는 구체적인 방법을 청정기술이 제공하고 있으며, 청정생산은 지구환경 문제를 사후처리 또는 치유하는 개념의 접근 방법이 아니고 사전예방적 전략이다.(중략)

• Proceedings of the Safety Management and Science Conference
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• 2003.05a
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• pp.285-290
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• 2003

There is only one server available and arriving work require services from this server. Job are processed by the machine one at a time. The most common objective is to sequence jobs on the severs so as to minimize the penalty for being late, commonly called tardiness penalty Based on other objectives, many criteria may serve as s basis for developing job schedules. Therefore, this study tries to proposed that Scheduling by customer needs group for minimizing the problem and reducing inventory, product development time, cycle time, and order lead time.