• 전력전자학회논문지
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• 제9권5호
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• pp.405-412
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• 2004

본 논문에서는 1차 측이 20m이상의 긴 트랙케이블(Track Cable)로 2차 측은 큰 에어 갭(Air-gap)을 갖는 픽업코일(Pick-up Coil)로 구성되어 있는 비접촉 전원에 대해서 서술하였다. 이러한 비접촉 전원은 1차 측 누설 인덕턴스가 자화 인덕턴스보다 크기 때문에 커플링이 좋지 않아 1차 측의 에너지를 2차 측으로 효율적으로 전달 할 수 없다. 이와 같은 문제점을 개선하기 위하여 본 논문에서는 직렬공진 컨버터, 병렬공진 컨버터 그리고 직ㆍ병렬공진 컨버터(SPRC)의 주 회로를 해석하였고, 각 회로에 대한 전압이득 특성을 비교 검토하였다. 그리고 10kW 직ㆍ병렬공진 컨버터(SPRC)에 대한 실험결과를 서술했다.

• 조명전기설비학회논문지
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• 제23권3호
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• pp.18-23
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• 2009

This paper focuses on development of new conveyer directly driven by the contact-less energy transmission system. The effect of the resonant circuit and the flux linkage characteristics caused from that are analyzed by using 3D finite element analysis. From the result it is shown that the resonant circuit needs to transfer energy from the primary core to the secondary core. Also the influence of the linear induction motor on the contact-less energy transmission system is presented. New conveyer and the experimental apparatus was manufactured by using the contact-less energy transmission system and the linear induction motor. Possibility of realization of the conveyer is proved by comparison the simulation result which is obtained by using 2D finite element analysis with experimental one and the characteristic of the voltage and resonant current.

• 한국직업건강간호학회지
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• 제25권2호
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• pp.108-117
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• 2016

Purpose: The purpose of this study was to determine the relationship between customer contact service and mental health among Korean taxi drivers. Methods: This was a secondary analysis of data collected from the 2015 Korean Working Conditions Survey. The sample included 496 taxi drivers in South Korea. The effect of customer contact service on mental health was analyzed using logistic regression analysis. The independent variables were general characteristics, working conditions, and hazardous factors in interactive service. Results: The prevalence of poor mental health was 56.3%. Taxi drivers experienced emotional involvement (17.2%), hiding feeling (32.0%), and contact with angry clients (18.3%) in their job. During the first month of their work, 33.7% experienced verbal abuse and 12.3% threats/humiliating behaviors. In bivariate analysis, verbal abuse, threats/humiliating behaviors, and physical violence were associated with mental health of taxi drivers. Multiple logistic regression analysis revealed 'emotional involvement' and 'contact with angry clients' were significant predictors of mental health. Conclusion: The findings of this study may be useful in developing intervention programs to improve the mental health of taxi drivers in South Korea.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 B
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• pp.919-922
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• 2006

Comparing with the conventional transformer without the air gap, a contact-less transformer with the large air-gap (4.8cm) between the long primary winding and the secondary winding has the increased leakage inductance and the reduced magnetizing inductance. By the increased leakage inductance and the reduced magnetizing inductance on the primary of the contact-less transformer, a good deal of the primary current circulates through magnetizing inductance, which results in a massive loss in contact-less power supply (CPS). In this paper, the efficiency characteristics of the contact-less power supply using a series resonant converter is analyzed and simulated. The results are verified on the simulation based on the theoretical analysis and the 1.8kW experimental prototype.

• 한국방사선학회논문지
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• 제15권2호
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• pp.165-171
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• 2021

영상의학과의 일반방사선 촬영실의 2차 원내감염(교차감염)의 방지를 위해 방사선사, 환자와 직접적인 밀접접촉부분의 미생물을 측정하였다. 방사선사 측은 방사선 발생장치의 엑스선튜브 손잡이, 환자측은 턱받침대, 가슴닿는 곳, 손잡이를 중심으로 미생물을 측정하여 배양하였다. 에니오설프로 소독한 후 멸균배지를 이용해 수합하고 동정하여 미생물을 확인하였다. 동정결과 방사선사 측은 Proteus mirabilis, Staphylococc us epidermidis, Bacillus spp., Candida spp., 103CFU, 환자측은 Proteus mirabilis, Enterococcu faecium, Pseudom onas aeruginosa, NTM, Candida spp. 가 103~5 CFU 검출 되었으며 환자측에서 수합된 미생물의 종류와 수가 더 많이 관찰되었다. 다행히 해당되는 미생물은 대부분 피부표면에 있는 것들로 관찰되었으며 원내감염관리 규칙에 의거하여 소독한다면 대부분 사멸하는 것으로 알려져 있지만 면역력이 떨어진 환자의 경우 소량의 노출로도 치명적일 수 있으므로 주의해야 한다. 특히, 환자와 접촉한 부분의 미생물이 높게 측정된 것을 보아 방사선사 및 수시출입자 등은 환자와 접촉이 잦은 기구 및 손잡이 등의 부분에 대해 소독을 철저히 해야 할 것으로 사료된다. 기존 에니오설프 연구를 기반으로 현재연구를 확대하여 원내 방사선 검사실의 미생물 안전관리의 중요성을 알리는 목적으로 조사하였고 병원 2차 및 N차 감염병 예방을 위한 기본적인 자료가 될 수 있을 것이다.

• 한국약용작물학회지
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• 제12권2호
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• pp.118-122
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• 2004

We have investigated that a couple of soft ferrite ceramic powders having a spinal structure have shown the effect on growth and secondary metabolites production of some medicinal plants cultured in vitro. The addition of the ceramic powders as bare state to culture medium has stimulated the growth of Achyranthes japonica callus and plantlet, adventitious root of Hyoscyamus niger and Platycodon grandiflorum hairy root about 65, 75, 150 and 50%, respectively. Whereas Centella asiatica callus and plantlet, Scopolia parviflora hairy root, and Hyoscyamus albus adventitious root were not affected markedly. Moreover, the ceramic powder has enhanced the growth of H. niger adventitious roots even under conditions of irradiating alone without any direct contact between ceramic powder and media. Based on growth stimulation effect, the ceramic powders have enhanced the gross production of tropane alkaloid in H. niger adventitious root, and polyacetylene in P. grandiflorum hairy root about 35 and 30%, respectively.

• 한국유전체학회:학술대회논문집
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• 한국유전체학회 2006년도 The 15th Korean Genome Organization Conference KOGO 2006 Annual Meeting
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• pp.33-33
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• 2006

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2005년도 춘계 학술대회
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• pp.291-292
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• 2005

• Journal of Astronomy and Space Sciences
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• 제19권1호
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• pp.31-38
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• 2002

2000년 2월부터 2001년 2월까지 소백산 천문대 61cm 망원경을 사용하여 CCD측광관측에 의한 ZZ Aur.(B, V ＆ R)의 새로운 광도곡선을 얻었다. 이와 함께 새로운 광도곡선으로 부터 주극심시각 3점과 부극심시각 7점을 얻었다. 새로운 광도곡선을 WD model에 적용하여 이 별의 궤도 요소를 구하였다

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 2008년도 한국우주과학회보 제17권2호
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• pp.29.2-29.2
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• 2008

The CCD photometric observations of the W UMa type contact binary GX Aur were performed for 33 nights from 2004 to 2008 using a 2K CCD camera and Johnson BVRI filter system attached to the 61cm reflector at Sobaeksan Optical Astronomy Observatory (SOAO). From our observations, the first BVRI light curves of GX Aur were completed and eight new times of minima (primary: 4, secondary: 4) were obtained. All the times of minima including our timings were collected and analyzed to see the dynamical behavior of GX Aur system. Intensive analysis of our BVRI lightcurves with the recent Wilson-Devinney binary model shows that GX Aur is an over-contact binary whose component stars have equal mass and time-variable spots.