• 조명전기설비학회논문지
• /
• 제15권6호
• /
• pp.103-110
• /
• 2001

최근 오존은 그 효용성을 인정받아 다양한 분야에서 사용되고 있으며, 그 수요 또한 계속 증가하는 추세이다. 이에 다양한 종류의 오존발생기가 연구되어지고 있다. 이러한 오존발생기는 모두 고농도와 고수율을 얻는데 그 연구목표가 있다고 할 수 있으며, 그중 하나가 동축원통형 오존발생기이다. 본 논문에서는 고주파 전원을 사용하는 새로운 형태의 원통형 오존발생기를 제안하였으며, 오존발생기의 전극 간극의 변화에 따른 방전특성과 오존생성특성을 연구하였다.

• Child Health Nursing Research
• /
• 제13권1호
• /
• pp.58-65
• /
• 2007

Purpose: The purpose of this study was to examine the effect of a discharge education program on maternal role confidence and parenting stress of mothers who delivered premature infants. The program provided them with information on childrearing and supportive educational nursing care. Method: This study was based on pretest-posttest nonequivalent nonsynchronized quasi-experimental design. The participants in this study were 30 mothers who delivered premature infants at a general hospital in G city. The instruments used in this study were Maternity Confidence Inventory, Parenting Stress Index(PSI). Results: The first hypothesis that the mothers in the experimental group would undergo changes in maternal role confidence after the intervention was accepted, as there was a statistically significant gap between the two groups(F=9.386, P=.000). The second hypothesis that mothers in the experimental group would undergo change in parenting stress after the intervention was accepted, as there was a statistically significant gap between the two groups(F=4.425, P=.380). Conclusion: The findings suggest that the Discharge Education Program was an efficient intervention method to boost the maternal confidence of mothers with premature infants and to decrease their parenting stress.

• 대한전기학회논문지:전기물성ㆍ응용부문C
• /
• 제49권1호
• /
• pp.44-51
• /
• 2000

In this paper, using a wide-band AE sensor with the frequency range from 100[kHz] to 1.5[kHz], the frequency spectra of AE signals generated from the corona discharges of the needle-plane gap and from the partial discharges of an epoxy void were analyzed to determine the proper ultrasonic sensor with optimum frequency range according to the patterns of corona discharges. We also examined the propagation characteristics of AE signals in oil and the relationship between the magnitude of corona discharge and the magnitude of AE signals in peak-to-peak value under the application of 60[Hz] ac high-voltage. From these results, the main frequency spectra of AE signals emitted from the corona discharges of the needle-plane gap were about 130[kHz] by the fast fourier transform, but the main frequency spectra appeared to be 230[kHz] in the partial discharges of an epoxy void. The magnitude of AE signals was proportional to the magnitude of corona discharge and discharge current pulse with increasing the applied voltages.

• 한국조명전기설비학회지:조명전기설비
• /
• 제8권3호
• /
• pp.54-63
• /
• 1994

본 연구에서는 판상스페이서 위에 침전극을 고정하고 gap간격 40[mm]에 평판전극을 설치한 gap 간에 10[mm]간격으로 나누어 각 구간내에 스페이서와 같은 재질의 Barrier를 설치하고 파티클을 두었을 때 AC 및 정극성 DC 전압에서의 방전로와 FOV에 대해 연구한 결과 다음과 같은 결론을 얻엇다. 1) Barrier가 고전위측에 위치한 경우와 파티클이 Barrier뒤에 은폐된 경우가 FOV가 높다. 2) 침전극 선단에 파티클 위치할 때 심한 FOV의 감소가 있다. 3) 파티클이 전극간에 게재되면 방전로는 파티클을 경유하므로 FOV는 감소한다.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2002년도 하계학술대회 논문집 Vol.3 No.2
• /
• pp.904-907
• /
• 2002

In this study, the plasma-assisted $CO_2$ conversion characteristics were investigated in the streamer corona discharge and silent discharge reactors with dielectric of $Al_2O_3$, to improve the conversion efficiency $CO_2$. Some discharge characteristics of $CO_2$ as parameters of gap spacing and applied voltage frequency, in both corona and silent discharge reactor were also obtained. The maximum $CO_2$ conversion rate was 10.1 [%] under the 5.2 [W] of discharge power and 250 [Hz] of applied voltage frequency.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
• /
• pp.539-540
• /
• 2006

In this paper, We examine that characteristics of formative electret with polymer film and electric charge storage using grid corona discharge. compound polymer of fluorine resin used for material in electret because of high electric charge accumulation, excellent electrical and physical characteristic. All experiments were carried out with circular samples of $Teflon^(R)FEP$ film, 12.5[${\mu}m$] thick. As experiment variables, we used voltage, electrode thickness, discharge electrode gap, and discharge time. According to this variables, we studied on characteristics of formative electret and electric charge storage. Additionally we make a comparative study of the result between the grid corona discharge and needle electrode discharge.

• 한국지리정보학회지
• /
• 제14권2호
• /
• pp.28-39
• /
• 2011

본 연구는 HyGIS-SWAT 모형을 이용하여 환경부의 대분류/중분류에 따른 유출부하 특성을 평가하고, 토지피복변화에 따른 유출부하 특성을 평가하는 것을 목적으로 하고 있다. 대분류와 중분류 토지피복변화는 두 유역 모두 시가지 지역과 농업지역이 팽창하고 산림지역이 감소하는 것으로 분석되어 현재 지속적으로 도시화가 확대되는 추세를 반영하고 있는 것으로 판단된다. 분류항목특성에 따른 분석결과는 무심천유역의 경우 첨두유출은 상승하였고, 연총유출량은 감소하는 것으로 분석되었다. 구축시기에 따른 특성 분석결과는 갑천유역의 경우 첨두유출은 감소하고, 총유출은 증가하는 것으로 나타났다. 토지피복변화 시나리오는 도시화 확대와 농업지역 확대의 3가지 시나리오를 적용하여 분석하였다. 분석결과 도시화 및 농업지역 확대 시나리오 모두 유출 및 유사농도가 증가하는 것으로 분석되었다.

• 전기의세계
• /
• 제17권3호
• /
• pp.39-42
• /
• 1968

We have been studying on the discharged phenomena if compound dielectrics for insulator which is very important in electric machinery and et al. In this paper we come to the couclusion that as a result of studying on the electric design of Ozonizer, the higher frequency becomes the better output could be got, and then discharge power could be the greatest by selecting the distance of the discharge gap and atomospheric pressure properly under the same applied voltage, and that power factor of the Ozonizer reached the maximum power at a particular frequency when the discharge power is maintained at constant.

• 한국재료학회:학술대회논문집
• /
• 한국재료학회 2010년도 춘계학술발표대회
• /
• pp.49.2-49.2
• /
• 2010

Copper oxide films have been deposited on silicon substrates by direct current magnetron sputtering of Cu in O2 / Ar gas mixtures. The target oxidation occurring as a result of either adsorption or ion-plating of reactive gases to the target has a direct effect on the discharge current and the resulting composition of the deposited films. The kinetic model which relates the target oxidation to the discharge current was proposed, showing the one-to-one relationship between discharge current characteristics and film stoichiometry of the deposited films.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2004년도 학술대회 논문집 전문대학교육위원
• /
• pp.88-91
• /
• 2004

In order to improve ozone generation, we experimentally investigated the silent discharge plasma and ozone generation characteristics of a multi-discharge type ozonizer. Ozone in a multi-discharge type ozonizer is generated by superposition of a silent discharge plasma, which is simultaneously generated in separated discharge spaces. A multi-discharge type ozonizer is composed of three different kinds of superposed silent discharge type ozonizers, depending on the method of applying power to each electrode. We observed that the discharge period of the current pulse for a multi-discharge type ozonizer can be longer than that of silent discharge type ozonizer with two electrodes and one gap.Hence, ozone generation is improved up to 17185 ppm and 783 g/kwh for the superposed silent discharge type ozonizer for which an AC high voltages with a 180 phase difference were applied to the internal electrode and the external electrode, respectively, with the central electrode being ground