• Journal of the Korean Chemical Society
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• v.5 no.1
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• pp.22-25
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• 1961

The attempt to distinguish between graphite and domestic anthracite was means, especially electric resistance. The specific resistance values of various coals and graphites were determined by Wheaston Bridge equipped with more finely adjustable slide wire. The result of graphite was in the below of 0.08 ohm-cm and that of anthracite has $10^{-1}{\sim}10^1$ohm-cm range.

• Journal of the Korean Society of Safety
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• v.10 no.3
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• pp.21-29
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• 1995

The automotive transmission is the principal component of the power transmission system which converts the engine power into the adjustable power for the vehicle driving system. To the unskilled driver the automization of transmission is required for the safety and fuel economy. In this study, the dynamic model of the automotive power transmission system was presented and simulation program and interface board which interface IBM-PC with ECU was devloped. Through the traveling simulation by interfacing ECU with simulation program, the shifting transients are investigated. For verification of simulation experiment was carried out, the results of simulation was agreed well with those of simulation.

• Proceedings of the KIEE Conference
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• 1999.07g
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• pp.3132-3134
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• 1999

To realize the power line communication system, the line coupler is one of the most important systems, which must be adjustable to the power line characteristics. In this paper, three kinds of line couplers were designed and simulated with the Pspice, which could be useful to the power line communication systems in C-Band(95kHz-148.5kHz) frequency

• Proceedings of the KIPE Conference
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• 2016.11a
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• pp.71-72
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• 2016

전동기의 운전 영역을 확대하기 위해 부스트 컨버터를 이용하여 가변 DC link를 합성한다. 가변 DC link 구간에서는 스위칭 손실이 증가하기 때문에 스위칭 횟수를 줄이는 전략이 필요하다. 제안하는 Edge-Cutting Pulse Width Modulation(ECPWM)을 통해 스위칭 손실을 1/3로 절감하고, 최적의 고조파 특성을 갖는 직류단 전압의 크기를 결정한다. 이를 이용해 가변 직류단 전압 구간에서 인버터 손실을 감소시키며, Bolognani 과변조 방법을 적용해 안정적인 6-스텝으로의 절환까지 고려한다.

• Proceedings of the Earthquake Engineering Society of Korea Conference
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• 2006.03a
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• pp.151-158
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• 2006

Recently, as RC flat plate system is applied on high-rising building largely, necessity of all over research about lateral performance becomes a prominent. In this paper, It is estimated that performance of slab-column connection in flat plate system is inter-story drift index 3.6%. In addition, when R-factor is fixed in seismic design, it must be considered all system. Also Considering that plastic hinge propagation is not adjustable, R-factor should be applied bellow '5.5'.

• 제어로봇시스템학회:학술대회논문집
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• 2001.10a
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• pp.47.1-47
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• 2001

The drilling process has a great importance for the production technology due to its widerspread use in the manufacturing industry. In order to enhance a maximum production rate and prevent the drill from the damage, it is important to monitor and control the drilling system. Thrust force and cutting torque are the main output variables in the design of drilling control systems. In this paper, an alternative estimation method of thrust force by using flexible neural networks is proposed. Flexible neural network uses the sigmoid activation function with adjustable parameter in order to enhance the approximation accuracy ...

• Bulletin of the Korean Chemical Society
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• v.21 no.7
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• pp.727-733
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• 2000

Analytical potential energy surfaces have been constructed for the four-center elimination of HCI from 1,1-dichloroethylene.The potential functions are Morse-type functions which are modified by appropriate switching and attenuating functions with adjustable parameters. The parameters have been found by fitting the calculated vibrational frequencies, reaction endothermicity, equlibrium geometries of the reactant and products to those of experiments and ab initio calculations. The translational energy release obtained from classical trajectory calculations on this surface is in good agreement with the experiment.

• Journal of Industrial Convergence
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• v.7 no.1
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• pp.33-43
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• 2009

The purpose of this study was to analysis to jobs inducing the Musculoskeletal Disorders(MD) and improve the working environment. The case study was conducted at S company where makes radiator case of heavy profile equipment. Most of works are plating and welding. Bending and welding are works which induce MD. The adjustable workstation and fatigue prevention mat were recommended for the welding and bending. A standing posture was recommended for the welding.

• Proceedings of the KIPE Conference
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• 2018.11a
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• pp.115-116
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• 2018

본 논문은 Polymer Dispersed Liquid Crystal (PDLC) 필름의 투과도 조절을 위한 전원 공급 장치 개발을 목적으로 한다. PDLC의 경우 블라인드를 대신하여 많이 사용된다. 따라서 계절, 시간, 날씨 등의 환경적 요인으로 사용자의 요구 및 필요에 의해 투과도 조절기능이 요구된다. 하지만 현재 시스템은 변압기를 사용하여 PDLC 필름을 구동시켜 투과도 조절이 어렵다. 본 논문에서는 인버터 출력의 듀티 비를 조절하여 PDLC 필름의 투과도 조절을 구현하였다.

• Journal of Korean society of Dental Hygiene
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• v.18 no.3
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• pp.295-310
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• 2018

Objectives: The purpose of this study is to identify the factors affecting job satisfaction, job stress, turnover intention, work-family and family-work relationship of married dental hygienists with young children. Methods: 242 copies of self-reported questionnaires were analyzed. Statistical analysis of collected data was conducted using the statistical program of Stata 13.0 (StataCorp., College Station, TX, USA). Results: Turnover intention was higher when the child age was lower and the child support and parenting stress were higher. But when working hours were adjustable, the turnover intention was low. Job stress was higher as the position, monthly income and night working hours were higher. Job satisfaction was higher as night work was fewer, work time was adjustable and family life satisfaction was higher. When parenting stress was high, job satisfaction was low and job stress and turnover intention were high. Work-family relationships were more affected by lower monthly income and parents-first child caregivers. Workplace factors affecting the family life were monthly income, caregiver and number of night work. The higher the parenting stress, the greater the mutual influence between family and work life. Age, family life, parenting stress and turnover intention were identified to affect family-work relationship. Parenting stress and job stress were identified to be influential on work-family relationship. Conclusions: Married dental hygienists are leaving the clinical setting due to their marriage and childbirth, or showing the effects on family-work and work-family relationships due to parenting. Efforts should be made to efficiently utilize professional manpower and to improve the psychological and physical working environment surrounding the married dental hygienists.