• Journal of the Korean Society for Railway
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• v.8 no.1
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• pp.87-92
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• 2005

Numerous advance studies usually have focused on preventing human error through mechanization and automation; however, this study. by connecting with accidents caused by careless handling on the basis of the present aptitude test, aims at investigating an improving plan for the railroad safety management system. To attain this purpose, present situation and point at issue of the aptitude test were surveyed through the questionnaire. Through this research, the aptitude test on railroad safety might be systematically improved by reforming some institutional issues.

• Proceedings of the KSR Conference
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• 2004.10a
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• pp.1486-1495
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• 2004

Numerous advance studies usually have focused on preventing human error through mechanization and automation; however, this study, by connecting with accidents caused by careless handling on the basis of the present aptitude test, aims at investigating an improving plan for the railroad safety management system. The purpose of this paper is to improve the efficient railroad management through the reduction of railroad accidents, by lessening the defective proportion, having a deadly impact on railroad business-regularity, confidence and safety. Through this research, the aptitude test on railroad safety might be systematically improved by reforming some institutional issues.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.3
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• pp.34-39
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• 2008

The purpose of this paper is characteristic analysis of multi-disk axial-gap pm motor for turbo compressor. The axial-gap permanent magnet motor has shown a growing interest in high-speed application for its high-efficiency, compact size and low vibration characteristics due to core-less structure. To achieve high-power, the axial-gap PM motor has multi-disk structure of stator and rotor disk. Because of its complicated magnetic flux path, it is not easy to calculate a dynamic characteristics using finite element analysis. In this paper, the simplified 2-D unfolded model to predict EMF characteristic is presented. To verify thesuggested 2-D unfolded model analysis of back-EMF characteristic was calculated and compared 3-D finite element. Finally the proposed method is verified by experimental results and shows good agreement with test results.

• Proceedings of the KIEE Conference
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• 2000.07d
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• pp.2522-2524
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• 2000

In this paper, a controller design for ironless linear synchronous motor is proposed. The designed controller is mainly composed of speed and current control, which are carried out by the high-speed digital signal processor(DSP). In addition the PWM inverter is controlled by space voltage PWM method. This system is implemented using by 32-bit DSP(TMS32OC31), a high-integrated logic device(EPM940), and IPM(Intelligent Power Module) for compact and powerful system design. The experimental results show the effective performance of controller for careless linear synchronous motor.

• YAKHAK HOEJI
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• v.55 no.4
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• pp.289-294
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• 2011

Illegal addition of steroids into cosmetics, ointments or drugs have been increased and their careless usage induced detrimental effect on health. We developed simultaneous analytical method using TLC, HPLC and LC/MS for the identification of 40 corticosteroids. 34 corticosteroids were well separated in HPLC with isocratic mode and remaining 6 drugs were also separated with gradient mode. All of the 40 corticosteroids were detected in negative mode in LC/MS. Halcinonide, prednisolone, triamcinolone acetonide and methylprednisolone hemisuccinate were detected in real samples.

• Korean Journal of Agricultural Science
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• v.24 no.2
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• pp.257-266
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• 1997

Changing environments in agricultural business make it necessary to promote the cooperative farming system so as to scale up farming size, which may contribute to increasing competitive power. Therefore, rural and fishery development program was established in 1990 to encourage individual farmers to jointly form the agricultural company or farming cooperatives. However, while the number of agricultural corporations has rapidly increased through the governmental support, their business achievements become worsening mainly resulting from unplanned and careless management practices. This paper suggested following strategies for management process reengineering to improve the efficiency of agricultural corporations; challenging business initiatives to enlarge volume of sales amounts, maintaining the optimal level of participants and physical assets for cost savings, and proper use of information technology and consulting agencies.

• Proceedings of the Korea Concrete Institute Conference
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• 2006.11a
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• pp.29-32
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• 2006

Different from new or reconstruction of an apartment housing, the structural safety in the remodelling construction can be obtained through the repair and strengthening process based on the safety diagnosis and evaluation of structural performance. In this study, structural performance of existing members such as, reinforced concrete slabs, beams and columns are investigated through experimental tests. The structural members were obtained from the existing apartment housing which will be demolished. Test results showed that most specimens have a sufficient structural capacity except for some special case, for example, specimens with severe cracks or concrete loss due to improper casting. This same severe deteriorated or defective structure members originated from bad concrete casting or careless construction process should be repaired and strengthened before an remodelling construction.

• Proceedings of the KIEE Conference
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• 2001.10a
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• pp.321-324
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• 2001

The accidents in a railway level crossing where passengers or vehicles pass on the track went through by the train with a inherent high rate on incidents lead to a vast economic damage on people and material resources. So, many protection equipments are placed on the railway crossing to prevent those kind of accidents. But there is a limit to control driver's rough activity, passenger's careless or an intentional accident. This study is trying to ensure the safety in railway crossing by providing the information on train's speed and expected passing time on the railroad to a road traffic control system or car driver. Additionally, this system has been studying the railway level crossing system concerning ITS to support harmonious traffic flow.

• Korean Institute of Interior Design Journal
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• no.18
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• pp.23-30
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• 1999

Nowadays, large-scale office buildings have been multistoried, mechanized, and functioned with economic growth. These buildings have improved and developed technical and designated respects in varied society. Even though these buildings are in improved situation, working places which are one of the most important parts have not developed enough their functions and shapes. Working environments that were ignored have come a big issue to rise efficiency and productivity. Working functions and work's opinions did not examine and analyze because of careless cognition of working places. In these reason, workers are engaged in inconvenient surroundings that already set improper way or not to develope environments that obstructs productivity. Working places which were ignored in the past have come a big issue to rise productivity and efficiency. Now, the goal of this research is to reform working places more efficient and functional by examining by examining working environment and proper arrangements.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.1178-1187
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• 2008

According to the operation data between $2007{\sim}2008$(January$\sim$June) for essential safety equipment including ATC, there were nothing special but stable and steady. And also emergency stop number of count are decreasing. But the frequency are still above the resonable count and it means driving condition should be improved through interface between ground and locomotive same as come to an understanding with driver. The number of count of emergency stop for VACMA(vigilance system) are also decreasing but also the frequency are above resonable count. This phenomenon caused by careless driving for the driver or the system malfunction. So the continuous monitoring for the data is necessary.