• 한국안전학회지
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• 제36권3호
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• pp.15-23
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• 2021

By analyzing the current status and type of industrial safety accidents caused by industrial machinery, this study aims to examine the importance and necessity of the safety devices that are installed on-site. Additionally, this study aims to determine the implications for Korea by analyzing the status of industrial accidents in major countries and the responses to the accidents. We found that workers could easily access and operate the safety devices and that productivity and convenience were more important than safety. Thus, safety devices need to be mandatorily installed on-site for the safety of workers, and only management supervisors should be given the authority to operate them to afford a sense of safety responsibility to the workers.

• 전자통신동향분석
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• 제36권3호
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• pp.145-160
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• 2021

We provide trends on postal vehicles owned and operated by 10 overseas postal agencies, USPS, Postes Canada, Royal Mail, La Poste, Deutsche Post DHL, PostNL, Australia Post, China Post, Japan Post, and Thailand Post. This will be a useful asset to look into how the posts worldwide operate and manages their postal vehicles and service strategies. In this study, we provide the simple specifications of vehicles operated by each post, how to replace vehicles, how to service maintenance and repair, and modes of pick-up & delivery to be introduced soon. We expect this study to present appropriate policy implications for both postal agencies and logistics companies that are facing a major turning point in logistics to operate and evolve the delivery vehicles.

• 전력전자학회논문지
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• 제26권6호
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• pp.411-420
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• 2021

In this paper, bidirectional LLC-LC resonant DC-DC converter with notch filters in the primary side of resonant circuits is proposed. Even if resonant capacitors are used on the primary and secondary sides, the proposed converter can operate with the high gain characteristics of the LLC resonant converter without mutual coupling of resonant capacitors, regardless of the direction of power flow. In addition, by applying notch filters, the proposed converter can operate with a wider gain control range and can cope with overload and short circuit. The analysis and operating characteristics of the proposed bidirectional LLC-LC resonant converter are investigated. A 3.3 kW prototyped bidirectional LLC-LC resonant converter connected to 750 V_DC buses is designed and tested to verify the validity and applicability of this proposed converter.

• 국제학술발표논문집
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• The 4th International Conference on Construction Engineering and Project Management Organized by the University of New South Wales
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• pp.330-334
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• 2011

Build-operate-transfer (BOT) projects are privatized infrastructure undertakings that face long-term investment risks and uncertainties. To ensure these projects can be completed on time and operated according to performance specifications, governments usually require BOT concessionaires to furnish performance bonds as a security. However, in order to attract investment, governments often provide abandonment rights for concessionaires to deal with investment risks and uncertainties. In the context of real options, these abandonment rights will increase project value, but the furnish of performance bonds will reduce this value. Currently in the BOT context, there is no real option model that can handle explicitly the impact of performance bonds on project value. In this paper, a real option valuation model is derived to deal with this important issue. The Taiwan high-speed rail project is used as a case study to show the applicability of the proposed model.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
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• pp.557-561
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• 1989

This paper presents a new operation method on power distribution system by automated distribution system (ADS). A performance of this automation is established to operate the distribution system faster than earlier. We reduced the period and region of power failure by ADS.

• 한국데이타베이스학회:학술대회논문집
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• 한국데이타베이스학회 2001년도 춘계 Conference: CRM과 DB응용 기술을 통한 e-Business혁신
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• pp.42-64
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• 2001

The Market is Changing. Challenges Operate and compete in a global economy with increased competition Cope with rising customer expectations (omitted)

• 공학교육연구
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• 제13권1호
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• pp.52-61
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• 2010

이 연구는 포장분야 교육과정과 자격시험의 연계 운영방안을 마련하는 것을 목적으로 한다. 구체적인 연구 목적은 첫째, 포장분야에 대한 직무체계를 마련하고, 둘째, 포장분야 교육과정과 연계한 자격시험 운영방안을 마련하고자 한다. 연구방법으로는 문헌연구, 전문가 협의회 등의 방법을 활용하였다. 포장 산업의 교육과정과 자격시험 연계 및 운영방안 마련의 기본방향은 포장 분야의 직무체계(Skills Framework)를 개발하고, 직무체계에 근거하여 직무분야별 국가직무능력표준은 개발하고, 이에 근거하여 교육과정을 개발 운영하고 자격시험에 활용할 수 있을 것이다.

• 한국응급구조학회지
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• 제6권1호
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• pp.185-197
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• 2002

Today, the basic problem of functional safe management of Korean Disaster Control system was separately administrated 33 acts that are relating to safe management in 13 ministries. Because of the facts that the fire service is not provided practically, the control system and risk management for safe administration are not operated, the information can not be shared with each other, and the various laws have the lacks of linkage, the National Safe System was appeared unsteady. The roles and functions of fire service have started with restriction to operate structurally and institutionally, which operational structure of fire service is becoming weak. As a result, the federal and local fire organizations have not reached yet to the institutionalization and the local fire service agencies have bias with the task regarding the fire service because of the relation between organizational structure and the local fire agency. With the enforcement of the federal and local fire system, professionality and autonomy for making policy, and dealing with changes of fire service positively, the national fire service on the policy performance can be established. Promotion of research and development and education training to strengthen innovation in technology and competition in fire industry will contribute to the firmly establishment of control system to prevent from fire, flood, terror and national disaster. This article proposed that (a) the established law and administration, agency are required efforts to effectively operate fire service system; (b) the national fire service agency, national college of fire, national institute of science fire, and national fire service hospital should be early established to make firmly policy to operate effectively and practically. These kinds of innovational acts are known the best ways of operating solid policy of national fire service system.

• 지역사회간호학회지
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• 제17권2호
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• pp.195-209
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• 2006

Purpose: This study attempted to access the health promotion activities and employee's health promotion needs in workplaces. Methods: Subjects were 280 health care managers employed at small to large scale enterprises in national-wide areas of Korea. The instrument was a structured questionnaire included characteristics of workplace and respondents, health promotion activities, health promotion needs, and bottlenecks to operate programs. Data was analyzed using SAS 8.1 by applying $x^2-test$, t-test and ANOVA. Results: 1, 25.4% of the total workplaces employed health care managers. 2. Musculoskeletal management programs(49.6%) were the highest operating program. 3. The highest needs of health promotion programs were lifestyle management and disease prevention. 4. Health promotion activities were significantly different according to the type and size of workplaces. The programs were more frequently applied in manufacturing industries than non-manufacturing and in large-scale enterprises than small and middle-scale enterprises. 5. The needs of health promotion programs were high in non-manufacturing industries than manufacturing industries in all programs. 6. The major bottlenecks to operate programs were the difficulty in securing time, lack of budgets and lack of legal regulations. Conclusions: Health promotion activities were linked to their work environments including budgets, time, and law. Therefore, to operate effective health promotion programs in workplaces, various health promotion programs are required to be developed and systems for governmental support and management should be established.

• 한국컴퓨터정보학회논문지
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• 제8권2호
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• pp.112-121
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• 2003

정보보호 및 암호기술은 If산업과 더불어 매우 많은 발전을 이룩하였지만 실시간 처리 및 비화성 유지 등은 아직도 해결해야 하는 문제점이다. 그러므로 본 논문에서는 표준화된 AES인 Rijndael에 대하여 비도 증가 및 처리율 증가를 위한 새로운 PRN-SEED 암호알고리즘을 제안하였으며 Rijndael 및 다른 AES와 비교하여 성능분석을 수행하였다. PRN-SEED 암호알고리즘의 구현은 Synopsys Design Analyser Ver. 1999. 10과 삼성 KG75 library 그리고 Synopsys VHDL Debegger를 사용하였다. 모의실험 결과, 대칭형 암호시스템인 DES는 동작주파수가 4MHz일 경우 416Mbps의 처리율을 가지며 Rijndael 암호시스템은 동작주파수가 50MHz일 경우 612Mbps의 처리율을 가진다. PRN-SEED 암호시스템의 전체 게이트 수는 10K이며 동작주파수가 40MHz일 때 128 비트에 대한 처리율은 430Mbps, 50MHz일 때 128비트에 대한 처리율은 630Mbps였다.