• Journal of information and communication convergence engineering
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• 제6권1호
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• pp.43-46
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• 2008

This paper proposes an advanced test circuit for detecting the connectivity between a drum ring of laser printer and PCB. The detection circuit of charge sharing is proposed, which minimizes the influences of internal parasitic capacitances. The test circuit is composed of precharge circuit, analog comparator, level shifter. Its functional operation is verified using $0.6{\mu}m$ 3.3V/40V CMOS process parameter by HSPICE. Access time is100ns. Layout of the drum contact test circuit is $465{\mu}m\;{\times}\;117{\mu}m$.

• 한국산학기술학회논문지
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• 제10권2호
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• pp.243-247
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• 2009

일차 충전 롤러는 OPC 드럼의 접촉 표면를 회전하면서 OPC드럼을 충전한다. 이러한 이유로, 일차 충전 롤러는 전도성을 갖는 탄성물질로 만들어진다. 충전 및 이미지의 특성은 코팅의 등급, 방법 및 환경에 의해 변한다. 본 연구에서는 좋은 품질의 이미지를 프린트할 수 있는 코팅 물질 및 방법을 개발 하였다.

• 가정과삶의질연구
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• 제30권6호
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• pp.85-101
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• 2012

This study was conducted to investigate the effect of group music therapy using the traditional drum on the; social adjustment, self-image, and emotional adjustment, of children with hearing impairment. I participated in this group music therapy using the traditional drum with 7 children with hearing impairment for 3 days a week for 6 weeks(including holidays), and each session was 50 minutes long. The evaluation form of this study is a social-emotional development measurement sheet of Meadow-Kendall, which the children's teacher distributed to the children both pre- and post-examination. With these results, the researcher carried out Window SPSS 19 Version and searched for the experiment's effect of measurement cause (I am not sure what this means.) through paired t-test to identify the experiment's effects (social adjustment, self-image, emotional adjustment) as a result of group music therapy using the traditional drum for children with hearing impairment. This study arrived at the following conclusions. First, after I participated in the group music therapy using the traditional drum, the result of the comparisons of the pre-to-post average for social adjustment showed the statistical significance level of the 0.01 standard. Therefore, it was found that the group music therapy using the traditional drum had a positive effect on the social adjustment of children with hearing Impairment. Second, after I participated in the group music therapy using the traditional drum, the result of the comparisons of the pre-to-post average for self-image development showed the statistical significance level of the 0.01 standard. Therefore, the group music therapy using the traditional drum had a positive effect on the self-image of children with hearing impairment. Third, after I participated in the group music therapy using the traditional drum, the result of the comparisons of the pre-to-post average for emotional adjustment showed the statistical significance level of the 0.01 standard. Therefore, the group music therapy using the traditional drum had a positive effect on the emotional adjustment of children with hearing impairment.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2007년도 추계학술발표논문집
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• pp.74-77
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• 2007

Primary charging roller rotated with contacting surface of OPC drum and take charge OPC drum. Owing to this reason, primary charging roller made by elasticity substance with electric conduction. Properties of charging and image changed by class of coating, method of coating and environment. This study developed about coating method to make print image of good quality.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2007년도 추계학술발표논문집
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• pp.170-173
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• 2007

Primary charging roller rotated with contacting surface of OPC drum and take charge OPC drum. Owing to this reason, primary charging roller made by elasticity substance with electric conduction. Properties of charging and image changed by class of coating, method of coating and environment. This study developed about coating material and coating method to make print image of good quality.

• 한국산학기술학회논문지
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• 제9권2호
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• pp.347-351
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• 2008

PCR은 OPC 드럼의 표면과 접촉된 상태로 회전하면서 드럼의 표면을 대전시켜야 하므로 접촉이 잘 되도록 적당한 도전성을 갖는 탄성체로 만들어야 하고, 또한 그 롤러 표면은 코팅을 하게 되는데 코팅제의 종류나 코팅 방식에 따라서 대전특성이나 화상특성이 달라지고, 또한 환경의 변화에 따라 화상특성이 달라진다. 본 연구에서는 양질의 프린트 화상을 얻을 수 있는 대전 롤러의 제조를 위하여 적합한 도전성 탄성체 롤러가 새롭게 개발되었다.

• 동서간호학연구지
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• 제25권2호
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• pp.174-182
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• 2019

Purpose: The purposes of this study were to develop a drum club activities program for soldiers and to explore the effects of the program on the mental health of soldiers. Methods: This study used one group pretest-posttest design. A drum club activities program for soldiers was offered for 12 weeks with each session of 2 hours. A total of 33 participants were recruited but eighteen participants who did not participate in sessions of the program more than 3 times were dropped out of the study. Finally, data from 15 participants were analyzed using the SPSS 22.0 program. Mental health status (stress, anxiety and aggression) was measured by Vibraimage technology. Vibraimage technology is a useful and objective method to identify the human psychophysiological state by analyzing the movement of various frequencies and amplitudes of head motion and face image using camera. Results: There is statistically significant difference in anxiety (Z=-3.12, p<.001) after implementation of the program. However, there was no statistically significant difference in stress and aggression. Conclusion: The results indicate that the drum club activities program was effective in decreasing anxiety in soldiers. The drum club activities program can be considered as a possible nursing intervention strategy to reduce anxiety for soldiers.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.574-575
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• 2021

재제조(Re-manufacturing)는 제품의 수명이 다하여 폐기단계에 있는 사용 후 제품이나 부품을 회수하여 재처리 후 신제품 조립공정과 같은 재조립 과정을 거쳐 본래 가지고 있던 제품의 기능 및 성능을 회복하도록 하는 제조방법의 하나이다. 재재조 산업은 환경보호 측면 뿐만 아니라 경제적 측면 또한 중요하다. 산업전반의 성패는 제품에 대한 신뢰 및 가격 경쟁력에 달려있다. 제품 제조 공정에서 인건비를 줄이고 제품의 신뢰도를 향상시키기 위해 영상처리 시스템을 이용한다. 본 연구에서는 폐드럼을 재생하기 위해 전처리 단계인 재활용 여부 판단 단계 및 드럼을 재생한 후 출고직전 영상처리를 이용하여 사람의 육안으로 식별이 어려운 이물질 및 불량을 검출한다.

• 한국산학기술학회논문지
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• 제11권10호
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• pp.3923-3927
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• 2010

대전롤러는 감광체의 표면과 접촉된 상태로 회전하면서 드럼 표면을 대전시켜야 하므로 접촉이 잘 되도록 적당한 도전성을 갖는 탄성체로 만들어 진다. 또한 그 롤러 표면은 코팅을 하게 되는데 코팅제의 종류나 코팅 방식에 따라서 대전특성이나 화상특성이 달라지고, 또한 환경의 변화에 따라 화상특성이 달라진다. 본 연구에서는 고품질의 화상형성을 얻을 수 있는 대전 롤러의 제조를 위하여 적합한 도전성 탄성체 롤러를 개발하였다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2014년도 추계학술대회 논문집
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• pp.138-140
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• 2014

The image quality of the color laser printer is highly related with the motion quality of actuators. However, the high precision system requires high production costs in general. The proposed design method in this paper improves image quality without increasing production costs. Using the synchronization method, time gap between exposure and transfer in organic photo conductive (OPC) drum and the period of driving gear revolution are synchronized. The proposed method is verified by computer simulations and experiment, and showed by printed images.