• 전기학회논문지P
• /
• 제63권3호
• /
• pp.125-130
• /
• 2014

This paper is research result for a development of solar cell silicon ingot glowing(SCSIG) PWM converter system for 120[kW] 3[kA]. The system include 3-phase AC-DC rectifier diode converter of input voltage AC 460[V] and 60[Hz], DC-AC single phase full bridge PWM inverter of high frequency, AC-DC single-phase full wave rectifier using center-tapped of transformer for low voltage 50[V] and large current 3,000[A], carbon resistor load 0.2 [$m{\Omega}$]. PWM switching frequency for IGBT inverter control set 15KHz. The suggested researching contents are designed data sheets of power converter system, PSIM simulation, operating characteristics and analysis results of developed SCSIG system.

• 조명전기설비학회논문지
• /
• 제28권11호
• /
• pp.33-41
• /
• 2014

This paper is research result for a development of sapphire silicon ingot glowing(SSIG) PWM converter system for 80kW 10kA. The system include 3-phase AC-DC diode rectifier of input voltage AC 380V and 60Hz, DC-AC single phase full bridge PWM inverter of high frequency, AC-DC single-phase full wave rectifier using center-tapped of transformer for low voltage 8.0V and large current 10,000A of output specification, tungsten resistor load 0.1[$m{\Omega}$]. PWM switching frequency for IGBT inverter control set 30kHz. The suggested researching contents are designed data sheets of power converter system, PSIM simulation, operating characteristics and analysis results of developed SSIG system. This paper propose

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2006년도 춘계학술대회 논문집 전기설비전문위원
• /
• pp.57-59
• /
• 2006

In this study, we experimented a deterioration characteristics by series arcing with 600V polyvinyl chloride insulation wire and analyzed the glowing/growing process of copper oxide, waveforms of contact voltage, current, power dissipation and carbonized patterns of insulation. We know that how glowing contacts and surface arcing can decompose PVC insulation and that it is possible for the subsequent series arc to ignite, and burn insulation. We expect that these results are useful for advancing the state-of-the-art in fire protection by Providing a better understanding of how electrical fires can initiate.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
• /
• pp.234-235
• /
• 2006

In this study, we experimented deterioration characteristics of PVC insulation wires for electrical apparatus by series arcing and analyzed the heat generation at the contacts of wires, glowing/growing process of copper oxide, waveforms of contact voltage, current, power dissipation, and so on. We found out that how glowing contacts and surface arcing can decompose PVC insulation and that subsequent series arc can lead to ignition. We expect that these results are useful for improving fire protection technology by providing a better understanding of how electrical fires can initiate.

• 방송공학회논문지
• /
• 제7권3호
• /
• pp.277-284
• /
• 2002

최근 디지털 TV를 이용한 데이터 방송의 관심과 중요도가 날로 증대되고 있다. 본 논문에서는 데이터 방송을 처리할 수 있는 DTV 셋톱박스를 구현하는데 필요한 미들웨어의 코어 부분을 다루며, 이를 실지 셋톱에 탑제하여 동작 테스트를 완료하기까지의 과정을 기술하였다.

• 한국화재소방학회논문지
• /
• 제29권3호
• /
• pp.43-47
• /
• 2015

구획된 소규모 공간내부에 각 경우별로 서로 다른 두 종류의 가연물로부터 발생된 연기(smoke)를 채운 후 미분무 헤더를 통해 분사압력과 분사시간을 서로 달리하면서 미분무를 분사하였으며, 이후 시간경과에 따른 광소멸상수의 변화 값을 측정하였다. 미분무가 구획된 공간내부에서 분사될 경우 각각의 실험조건에 따른 연기제거효과의 패턴과 차이점은 감광식 연기농도계를 통해 고찰하였다. 실험에 이용된 감광식 연기농도계를 통해 시간변화에 따른 연기밀도의 변화값을 직류전압(DC voltage)의 변화값으로 확보할 수 있었으며, 이를 통해서 광소멸상수의 변화를 알 수 있었다. 훈소(glowing)에서 발생한 연기가 불꽃연소(flaming combustion)에서 발생한 연기보다 연기의 제거효과가 컸으며, 분사압력이 높을수록, 분사시간이 길수록 연기제거효과는 크게 나타났다.

• 한국의류학회지
• /
• 제34권2호
• /
• pp.266-279
• /
• 2010

This research investigates the influence of color as an important factor of the visual image created by clothes. First, the factor analysis of the adjectives describing the images of clothes shows that the images of clothes are classified into 4 factors that include attraction, brightness, femininity, and the figure type (of which the attraction factor and brightness factor were found to be important dimensions). Second, as for the images of feminine style clothes colors, violet appears more refined and attractive than other colors in all 3 tones. Red appears as a brilliant and glowing image in a vivid tone. Yellow in a vivid tone and pale tone, and red in deep tone appear as a warm image, while blue appears as a cold image in all 3 tones. Blue and violet appear as a tall and slim image in all 3 tones. As for the images of mannish style clothes colors, yellow in vivid tone, violet in pale tone and red in deep tone appear as the most refined and attractive image, while green in all the tones appears as a rustic and unattractive image. Red in vivid tone, yellow in pale tone and violet in deep tone appear as a very brilliant and glowing image. Red in pale tone and deep tone appear as a warm and feminine image. Third, yellow in all the tones is evaluated to be attractive in the mannish style in the comparison of the image of feminine and mannish style clothes color, while blue in a pale tone in feminine style and in deep tone in mannish style earned high points. Red and violet did not show any significant differences between the two styles.

• 정보학연구
• /
• 제8권4호
• /
• pp.27-42
• /
• 2005

In recent days a glowing consensus has been emerging among Korean manufacturing companies that e-Supply Chain Management. The companies also realize that the introduction of e-SCM is not an easy undertaking, and it faces a lot of difficult obstacles. Study was called e-SCM in order a small paper let our country Small and Medium industry understand importance of e-SCM, and to be utilized, Both understanding about e-SCM of College students and investigation executed a parallelism. The companies, Which actually do some e-business and are keen to do so in the future, have a better chance to introduce e-SCM.

• 대한수의학회지
• /
• 제28권1호
• /
• pp.75-81
• /
• 1988

The present study was conducted to investigate the Bordetella bronchiseptica infection in Youngnam swine herds during the period from August 1986 to July 1987 and some properties of the organisms isolated from these Korean swine. B. bronchiseptica was recovered from 25 of 70 (35.7%) glowing pigs of 4 to 10 weeks of age and from 12 of 13 (92.3%) herds. From 115 slaughter pigs, 58(50.4%) pigs were culture positive and the pigs from 13 of 14 (92.9%) herds were found to be infected with B. bronchiseptica. The majority of biochemical and cultural properties of B. bronchiseptica isolated from Korean swine were identical to those of the standard strain employed and some 97.6% of the isolates showed the characters of phase I organism on primary isolation.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2005년도 춘계학술대회논문집
• /
• pp.454-458
• /
• 2005

Light railway system has many characteristics of better accessibility, frequency service, low construction cost, reduced air pollution and medium capacity public transport etc. Light railway system as a urban transportation system has been glowing worldwide since the late 20th century. More than 300 cities around the world have light railway systems. Many medium-size cities in domestic site is planning the construction of light railway. This paper reviews the domestic and foreign light railway system.