• 산업기술연구
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• 제20권A호
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• pp.159-167
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• 2000

In the study rainfall frequency analysis attemped the many specific property data record duration it is differance from occur to error-term and probability ditribution of concern manifest. error-term analysis of method are fact sample data using method in other hand it is not appear to be fault that sample data of number to be small random variates. Therefore, day-rainfall data: to randomicity consider of this study sample data to the Monte Carlo method by randomize after data recode duration of form was choice method which compared an assumed maternal distribution from splitting frequency analysis consequence. In the conclusion, frequency analysis of chuncheon region rainfall appeared samll RMSE to the Gamma II distribution. In the rainfall frequency analysis estimate RMSE using random variates great transform, RMSE is appear that return period increasing little by little RMSE incresed and data number incresing to RMSE decreseing.

• 한국조리학회지
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• 제22권1호
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• pp.126-134
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• 2016

This study examines effect in customer satisfaction of the emotional intelligence of members at service providing department in the hotel; A case of five star hotels in Dajeon Research hypotheses were developed based on previous literature, and data were collected from 350 employees working at the hotel restaurant service business located in Daejeon, ROK, were investigated herein The collected data were then analysed using frequence reliability For this research analysis, a self-recording method was used where and examiner explains the survey and respondents writhen down their answers to survey questions Statistical processing in this study was done through data cidubg and data cleaning then with the SPSS(Statistical Package for Social Science)v. 18.0. This result the emotional intelligence of service-providing employees at food service department of hotel was found to have a positive effect on customer satisfaction via understanding of others and emotional control. And the understanding of oneself, understanding of others and emotional control in emotional intelligence had a positive effect on job satisfaction. Emotional control, and emotioal use were found to affect organizational commitment positively.

• 산업공학
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• 제21권4호
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• pp.435-443
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• 2008

RFID (Radio Frequence Identification) is emerging technology and it is used for many fields. The research about RFID has been focused on hardware such as increasing hitting ratio. But recently the research about how and where RFID can apply is going on. Especially people are doing research about connecting RFID with existing information system. In this paper, when BPM manage RFID based manufacturing operation process, we show components which is needed and how we can obtain the components. And we apply this to straw manufacturing process on experiment. The claim-handling process and order-handling process which need improvement in straw manufacturing are chosen and we improve those processes. For executing the improved process, we define components which are database, data acquisition workflow and real-time event processing system and then we make prototype system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 F
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• pp.1961-1963
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• 1997

A new higher reaching speed algorithm for the position control systems of the treveling wave type Ultrasonic Motors(USM) is presented. As the frictional forces of the stator materials revolves the rotor, the temperature of the contact surfaces is increased. It deteriorates the performance of control system so that the control frequency of inverter deviate from the natural resonant frequence of USM during the normal operation. In order to get higher reaching speed in the position control, we propose a novel algorithm that detect the resonant frequency of USM using the simple hardware and decision Processing. The effectiveness of proposed algorithm is verified by the experimental results.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 A
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• pp.321-323
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• 1996

In this paper, it introduces a several circuit type of current-fed Full Bridge high frequence inverter with VVVF function. These inverter circuit presents various output control method according to on/off signal pattern of switches. also, It is certify that the accordance of characteristics is compared theoretical waveform with experimental results according to each signal pattern.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2000년도 춘계학술발표대회
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• pp.215-218
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• 2000

A. oryzae에 있어서 protoplast를 이용한 형질전환이 아닌 세포벽이 부분적으로 분해된 cell을 이용하여 electroporation으로 형질전환시켰고, novozyme234, hemicellulase와 celluclast를 사용하여 형질전환 효율이 어떻게 다른지를 비교 분석 하였다. Hemicellulase를 $^{\sim}10^8$ cell에 처리하여 A. oryzae에서 83 transformants/10ug of DNA를 얻었고, novozyme234와 celluclast를 사용하였을 때는 4.3 transformants/10ug of DNA를 얻었다.

• 한국해양공학회지
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• 제15권3호
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• pp.114-119
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• 2001

Goda formula (Goda, 1973) has been used in the determination of wave pressures acting on a large size caisson such as the pier of the cable stayed bridge at sea. Goda formula, however, is to evaluate the wave pressures acting the infinite vertical caisson of composite breakwater so that it can`t be applied to a large caisson with finite width and length because of diffraction effects. In the present study, three dimensional nonlinear frequence domain method based on perturbation method and boundary integral method is applied to the computation of the linear and nonlinear wave pressures acting on the front of a large size caisson under the variation of its width and length, and angle of incident wave. The numerical results are compared to Goda\`s ones, and then the characteristics of wave pressure distributions acting on a large size caisson are discussed.

• 한국진공학회지
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• 제4권4호
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• pp.413-416
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• 1995

고주파 마그네트론 스펏터링법을 이용하여 ZnO막을 제조하고 유리기판 위에 ZnO-SAW필터를 제작하였다. ZnO막의 제조 조건은 고주파 전력 150W, 기판온도 $200^{\circ}C$, 분위기압 5mTorr 및 O2/(Ar+O2)비 50%였다. 한편 IDT(Inter-digital transducer)전극은 전극 폭을 2.56mm, 전극 거리를 2,936mm, λ/8폭을 $8mu$m로 설계하였다. 제작된 ZnO-SAW필터의 주파수 응답을 측정하기 위해 소자는 mount(TO8)에 고정시켰다. ZnO SAW필터의 통과 대역(3 dB대역폭)은 345.2~44.8 MHz로 9.6MHz의 대역 폭을 나타내었으며 중심주 파수는 40 MHz를 나타내었다. 또한 삽입 손실은 39 dB, 통과 대역에서의 리플(ripple)은 $\pm$ 0.8 dB 및 rejection은 17 dB를 나타내었다.

• 에너지공학
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• 제10권4호
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• pp.335-341
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• 2001

펌프에서는 회전차와 케이싱의 간섭에 의해 압력 펄스가 발생하게 되는데, 이러한 압력 펄스가 펌프의 배관계와 공진을 형성하게 되면 큰 진동 및 소음을 일으켜 문제를 야기시킬수 있다. 따라서 본 연구에서는 단단·한쪽흡입형 벌류트 펌프를 대상으로 하여 펌프성능에 영향을 미치는 인자 가운데 회전차 외경과 흡입경을 고정하고, 깃의 입·출구각과 깃 수를 단계적으로 변화시켜 이에 따른 압력펄스의 변화와 배관계와 공진현상 조건을 실험적으로 규명하였는데, 배관계의 진동은 토출량 및 펌프의 회전수보다 배관 및 회전차의 형상에 크게 영향을 받음을 알았다.

• The Korean Journal of Ecology
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• 제13권2호
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• pp.131-142
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• 1990

From July 1, 1985 to June 30, pH values of precipitation in Seoul area were average 5.1 and acid rain which was lower than pH 5.5 showed a frequence of 70.7%. Seasonal changes appeared in pH values of annual precipitation in Seoul. The pH patterns of spring and autumn were generally less acid than that of summer and winter, and snowfall pH was lower than rainfall. The beginning rainfall in Seoul was neutral because of alkali dust in the atmosphere. As times went on, rainfall pH was gradually low and after 1 to 2 hours, showed a steady state. On the surface soil precipitation was neutralized by soil buffering capacity.