• Proceedings of the KSR Conference
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• 2010.06a
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• pp.2052-2057
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• 2010

In December 2006, the Ministry of Environment in Korea established the "Indoor Air Quality Management Guidelines in Public Transportation." As the items of the guideline, $CO_2$(Carbon dioxide) and PM10(Particulate matter). Therefore, the air quality inside the train is supposed to be ruled by this guideline. This study calculated the increase or decrease rate of the $CO_2$ concentration by using the data measured in accordance with flap operation. In case of flap close or open, the calculated $CO_2$ concentration variation was 6.32ppm/min. The $CO_2$ concentration prediction equation was derived from the general equation and the actual measured value are compared with the predicted $CO_2$ concentration suggested during the KyungBu high speed railway construction. The predicted value show good agreement with the measured data.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2010.05a
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• pp.225-226
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• 2010

ISO 22266-1 issued in May 2009 provides guidelines for applying shaft torsional vibration criteria, under normal operating conditions, for the coupled shaft system and long blades of a turbine generator set. In case that a turbine generator vendor do not meet the separation margin of torsional natural frequencies in the technical specifications of the purchaser, this standard can present the reasonable and objective criteria about torsional vibration which both purchaser and supplier can agree on, while ensuring the integrity of turbine generator. This paper describes the application case of ISO 22266-1 for the establishment of torsinal vibration criteria under retrofitting the turbine generator of 'U' nuclear power plant.

• Journal of Korean Library and Information Science Society
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• v.42 no.2
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• pp.5-28
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• 2011

The ultimate mission of the university library is to provide the various information services in support of the teaching, research, and public service missions of the university. The achievement of the mission requires the optimal development and timely revision of university library standard that can be used as an operating guidelines and assessment tools. On the basis of this justification, this study has compared the trend and feature of library standards in major countries(USA, Canada, UK, Japan, Taiwan), analysed the problems and limitations of legal and recommended standards in Korea, and suggested the revised plan of Korean university library standard focusing on collections, staffs, and facilities.

• Journal of Korean Academy of Nursing
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• v.43 no.4
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• pp.453-467
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• 2013

Purpose: This study was done to describe nurses' experience of incivility in hospitals and to consider nurses' work environment. Methods: Data were collected through in-depth interviews and analyzed using Colaizzi' phenomenological analysis methodology. Participants were seven experienced clinical nurses working on a general ward (2 nurses), or in an intensive care unit (2 nurses), emergency room (2 nurses), or operating room (1 nurse). Results: The incivility that nurses experienced was categorized as follows: 'being afflicted as a weak person', 'being treated as less than a professional', 'being overwhelmed by shock and anger', 'experiencing an untenable situation', 'struggling to survive', and 'pursuing professional growth'. Conclusion: Behavior guidelines should be developed to reduce incivility, and incivility cases should be continuously monitored by the nursing department. Also, to handle incivility problems in clinical nursing areas, a reporting and counseling system and education programs are needed.

• Journal of the Korea Institute of Military Science and Technology
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• v.8 no.4 s.23
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• pp.77-84
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• 2005

In this research, usability testing techniques had been applied to currently operating Military Logistics System software, and the effects of improvements made were verified. Furthermore, this research aims to assist the army to execute their researches on usability testing in the future. Various usability testing techniques and guidelines presented in this paper will be easily adapted to the research environment of the army. Consequently, the results of this research would play an important role in future development and evaluation of the Military Logistics System software.

• Proceedings of the KIPE Conference
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• 2003.07b
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• pp.544-547
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• 2003

The purpose of this paper is to develop the straightforward design guidelines of PD/PID speed controller for Industry servo drives with plug and play concept. The controller gains are uniquely determined from the current control loop dynamics, speed loop delay, and mechanical parameters. In order to eliminate the mechanical friction uncertainties, an automatic PD/PI control mode switching algorithm Is introduced using online spectrum analysis of motor torque command. The dynamic performance of the proposed scheme assures a fast tracking response curve with minimal oscillation and settling time over the whole operating conditions. For comprehensive comparison of conventional PI control scheme, extensive test is carried out on actual servo system.

• International Journal of Highway Engineering
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• v.19 no.6
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• pp.183-190
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• 2017

PURPOSES : The objective of this study is to establish the traffic volume-based warrants of right-turn lanes at unsignalized intersections and to introduce a risk probability methodology based on the warrants. METHODS : In this study, a risk probability of a potential rear-end collision is applied between a right-turn vehicle and the immediately following through vehicle. Using the shifted negative exponential model and the compound probability theorem, the risk probability can be expressed as the function of directional volumes and the percentage of right-turns for a two-lane and four-lane highway, respectively. RESULTS : Based on the risk probablity, guidelines for installing right-turn lanes on two-lane and four-lane highways were developed. The risk probability also showed rationality by comparing with right-turn same-direction conflicts observed in-situ. CONCLUSIONS : The results of our study define the total approaching volumes to encourage a right-turn lane as a function of operating speed, percentage of right-turn, and number of lanes.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.32 no.2
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• pp.94-103
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• 2009

In relation to a certification system recently, it is coming out complains about make a rule of thumb certification, problems of after-service and duplication with government certifications. Also there is confusion in operating certification system to lack of properly rule to international standard. These impose a heavy burden on company in terms of times and costs and enhance competitiveness. Nevertheless, the survey was not built yet for the status and problems of the cooperation group standards certification System. So, this study purposes that research on the actual condition and development of operational guide for cooperation group standards certification system. In addition it ultimately improve the certification system for reliability and international competitive power. For more detail on this study, it would be considered conformity assessment, domestic/international conformity assessment and certification criteria. Also comparing survey result on the actual condition with international standards, develop operational guidelines to meet international standards.

• Journal of Power Electronics
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• v.1 no.2
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• pp.71-77
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• 2001

This paper proposes a new zero-current switching (ZCS) pulse-width modulation (PWM) switch cell that has no additional conduction loss of the main switch. In this cell, the main switch and the auxiliary switch turn on and turn off under zero current condition. The diodes commutate softly and the reverse recovery problems are alleviated. The conduction loss and the current stress of the main switch are minimized, since the resonating current stress of the main switch are minimized, since the resonating current for the soft switching does not flow through the main switch. Based on the proposed ZCS PWM switch cell, a new family of DC to DC PWM converters is derived. The new family of ZCS PWM converters is suitable for the high power applications employing IGBTs. Among the new family of DC to DB PWM converters, a boost converter was taken as an example and has been analyzed. Design guidelines with a design example are described and verified by experimental results from the 2.5 kW prototype converter operating at 40 kHz.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.22 no.9
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• pp.1907-1915
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• 1997

The management of network in TMN defines and manages the objects which are the operating system and communication equipments in network. GDMO is used to describe thoseobjects. GDMO is not directly used for managing network, but translated into a language with object-oriented paradigm. This paper presents design and implementation of the translator which automatically translates the specification of GDMO to the object-oriented language for generating MIB(Managment Information Base). And the system includes various graphic use interface to enhance the development environment of GDMO.