• Proceedings of the KIEE Conference
• /
• 1993.07b
• /
• pp.812-814
• /
• 1993

During the last two decades, we experienced a few of the energy shocks and felt the importance of the energy saving seriously. As our energy reliance on other countries is absolute. We must counter these situations nationally. To save the electric energy, various methods are explored such as the moderation of motor capability, the use of high efficiency system, the supervision of lighting systems, demand monitoring control systems. In this study, we develop a system for electric power energy saving. In Case the receiving point voltage is higher than the required voltage, the system reduce the voltage to an allowable level and by doing so it saves energy and protects the equipments from over voltage.

• 제어로봇시스템학회:학술대회논문집
• /
• 2001.10a
• /
• pp.66.2-66
• /
• 2001

Double-effect absorption chiller-heaters have been widely installed in large buildings and are also becoming popular in mid-sized commercial buildings. While much emphasis is Put on designing energy saving and efficient chiller-heaters, careful attention must also be given to the design of control systems for these devices. Currently, these devices are controlled by their own built-in controllers, such as relay based sequence controller or microprocessor based controller. But, because large buildings require multiple chiller-heaters, a centralized supervision and control system is necessary for the efficient monitoring, control, and operations management of these devices We have developed man-machine interface software that allows the implementation of such a system. This system will support increased reliability, more efficient building management operations, and reduced ...

• Journal of the Architectural Institute of Korea Structure & Construction
• /
• v.35 no.11
• /
• pp.171-180
• /
• 2019

This research proposed the Direct Construction System for construction corporations as a strategy intended to perform cause analysis of construction technician shortage matter and solve resulting problems, and in view of the outcomes from the application of this system to the projects and workshops, it was verified that unsteady employment, lack of career prospect, and conditions of work environment can be resolved. In addition, from corporations' perspective, it is considered that by clarifying the abovementioned three problems, fundamental complications of construction administration, quality control, safety supervision, and cost management were settled, concluding forthcoming advancement of domestic construction business quality fell far behind developed counties.

• Ocean and Polar Research
• /
• v.30 no.1
• /
• pp.89-107
• /
• 2008

Marine environment is subject serious destruction because of frequent accidents during exploration of marine resources and overseas transport. Also, as many industrial enterprises discharge high volume of wastes and contamination, marine pollution has become a serious threat to people (especially in China). China is quickly becoming a world economic leader of the 21st century. Rapid industrialization and social changes have raised the standard of living of millions of the Chinese, mainly in the areas of East and South East coast. The process of industrialization, however, is often followed by deterioration of the marine environment and rarely turned around until a country has increased its standard of living. Solving these array of problems will take decades and currently the government is addressing minor specific issues only. Fortunately, the Chinese government has enacted a number of marine pollution control laws. On 25 December 1999, the 13th Session of the Ninth Standing Commettee of the National People's Congress passed the amended the Marine Environment Protection Law of the People's Republic of China. This Law establishes rights and responsibilities of the relevant departments concerning marine environment management and provides for two new chapters on "Marine Environment Supervision" and "Marine Ecological Protection", along with "Supervision of Pollution Prevention for Marine Construction Projects", "Marine Ecological Protection" and "Marine Environment Pollution Prevention for Marine Construction Projects". Also, the Law was amended with provisions for integrated pollution discharge control system and oil spillage emergency response plan and enhanced legal responsibilities. Chinese government recognizes that international and national experience can be useful for China to prevent further ecological degradation of the marine environment.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.32 no.5D
• /
• pp.463-472
• /
• 2012

Exemplary contracts of construction management (CM) including highway projects have been carried out in the civil engineering area over the past ten years. However, practical and administrative challenges as transitional circumstances have been revealed in the different participants of supervision, inspection and construction management. Thus, it is important to internally overcome problems and negative perception encountered in civil engineering, and to promote the efficiencies in construction cost and quality. In addition, external efforts should be put to market opening, globalization, and technology development for competitiveness and high value industry. While it is critical to establish the concrete CM system by collaborating with various participants, proven architecture and system have not been provided because of incorrect measurement of CM accomplishment, overlap of responsibility between CM and supervision, and slow deployment in construction field. This paper analyzed the current CM practices and business environments, and presented the possible solutions for strategy improvement of CM in the owner's view point.

• Safety and Health at Work
• /
• v.11 no.4
• /
• pp.418-424
• /
• 2020

Background: According to the previous studies, the work-related accident rate decreased in Korea after the introduction of occupational health and safety management system (OHSMS), but there were several disasters in Korea such as subway worker's death at Guui station in 2016 and the Taean thermal power plant accident in 2018, which escalated the social demand for safety. In 2018, OHSMS became an international standard, as ISO45001 was announced. Methods: A survey was conducted to research the implementation status of OHSMS and changes in people's perception, and the results were compared with those of a past survey. Results: Enhanced social demand and various stakeholders' (not only buyer) needs, and social responsibility are perceived as the motivation for the introduction of OHSMS rather than legal compliance or customer demand. In the questionnaire about problems with the implementation of OHSMS, the factors with higher response rate in 2018 than 2004 were "excessive cost" and "complicated documentation management." In the questionnaire about how to promote OHSMS in organizations, most people answered "reduction of workers' compensation insurance rate" in 2004, but most people answered "exemption from health and safety supervision" in 2018. Conclusion: For the effective implementation of ISO45001, emphasis is placed on social demand, training to recognize health and safety as a part of management, and the reduction of certification and consulting costs to promote the introduction of OHSMS. Incentives such as insurance premium cuts and exemptions from health and safety supervision are needed.

• Journal of Korean society of Dental Hygiene
• /
• v.21 no.6
• /
• pp.773-784
• /
• 2021

Objectives: This study presents the basic data necessary to explore the methods used of Korean dental hygienists to resolve oral health inequalities in Korea via reviewing the professionalization trend of American dental hygienists. Methods: The supervision levels of American dental hygienists, and system of dental therapists were analyzed using the data published by the relevant associations. Results: In America, dental hygienists help address oral health inequalities. However, due to limitations in the supervision levels and scope of practice of dental hygienists, the autonomy of dental hygienists was expanded, and mid-level practitioner were employed. The autonomy for dental hygiene practice was higher in public than in private in America. Some states have introduced dental therapists as mid-level practitioners. Their practice settings have limitations such as serving low-income, uninsured, and underserved patients or serving in a dental health professional shortage area. Conclusions: It is necessary to expand the autonomy of dental hygienists based on their profession. In particular, it is suggested that they start with the low-risk level practices. Further, it is necessary to introduce a dental hygiene specialist system specialized for fields with high social demands.

• Culinary science and hospitality research
• /
• v.8 no.3
• /
• pp.107-122
• /
• 2002

The analysis result regarding the influence where the enterprise culture goes mad to a duty satisfaction with afterwards is same. First. The enterprise culture factor who causes an effect in the supervision factor of duty satisfaction joint ownership of management idea, appeared with the example by leadership factor. Second. The enterprise culture factor who causes an effect in the promotion factor of duty satisfaction appeared with the all feeling factor of system. Third. The enterprise culture factor who causes an effect in the wages factor of duty satisfaction appeared with the all feeling factor of system. Fourth. The enterprise culture factor who causes an effect in the duty form factor or duty satisfaction clearness or example by leadership and belief, duty affirmation appeared with the factor. Fifth. The enterprise culture factor who causes an effect in the service environment factor of duty satisfaction appeared with the all feeling factor of system. Conclusion the enterprise culture appeared with the fact that it causes an effect duty satisfactorily.

• Proceedings of the KIEE Conference
• /
• 1991.07a
• /
• pp.34-36
• /
• 1991

The idea of expert control is to incoporate a rule based expert system in a feedback control system. In this paper, we present some heuristic rules about input requlation and supervision and turning for D.C servo motor speed control in variable. The expert auto-turning PID controller which heuristic rules are used as an element of the feedback control system is implemented with the numerical algorithms and heuristic logics. The accurate control function is confirmed by computer simulation.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.10 no.3
• /
• pp.64-70
• /
• 1996

In this paper, we designed a low cost data logger system using single chip microcontroller. It detects the normal and abnormal current in distribution system. A sampled analog signals are stored on RAM card(4Mbit) after digitalized by internal A/D converter. Stored data can be transmitted to the personal computer either by internal serial communication port or by external parallel communication port. The transmitted data are analyzed and displayed on personal computer.