• Journal of the Korean Vacuum Society
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• v.8 no.2
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• pp.136-140
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• 1999

The stability and response time of $WO_3$ thin films for EC device are critical problems being solved. Those are affected by the species of electrolyte, preparation conditions and fabricating methods of specimen. In this paper, we compared the stabilities of three kinds of tungsten oxide film in electrolyte. Each of three films was prepared by different manufacturing conditions, that is, one is a thermal oxidation film of tungsten metal deposited on pure glass substrate, another is a $WO_3$ film made on ITO glass directly, the other is a thermally oxidized film on tungsten plate. It was observed that thermally oxidized $WO_3$ films has a remarkable stability (the lifetime was above $10^6$ cycle). From these results, we found that the stability was closely related to the stoichiometric bonding between tungsten and oxygen atoms in addition to crystallinity and density of film.

• KOREAN POULTRY JOURNAL
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• v.9 no.2 s.88
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• pp.72-76
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• 1977

부로일러를 육성함에 있어서 일정한 체중의 상품을 만들어 판매할 때 남보다 출하일령 즉 사육일령을 단축시킨다는 것은 사료효율의 향상뿐만이 아니라 생산원가치의 절감, 생산능력의 향상 등 수익성에 큰 영향을 미치게 하는 요인이 된다. 그러면 출하일령을 단축시키자면 병아리의 선택을 무엇보다도 잘하여야 하며 마음은 사료의 품질여하가 성장 및 효율에 큰 영향을 미치게되며 나아가서 같은 병아리에 같은 사료라 할지라도 시설과 환경 및 관리방법의 양부에 따라 큰 영향을 미치게 하니 이점을 특히 고려혀여야 한다. 같은 병아리에 같은 사료로 사용하였다하더라도 환경과 관리방법 여하에 따라서 1.5kg의 체중을 만드는데 50일이 소요된 자가 있는가하면 60$\~$70일이 걸리는 경우가 있으며 더욱이 병아리와 사료까지 품질에 차이가 있는 경우에는 더욱 큰 차이가 생겨 생산원가면에서 생계 1kg중 400원이면 가능한 경우가 있는가하면 600$\~$700원까지 원가가 소요되는 경가 있다. 따라서 수익에 큰 영향을 미치게 되는 것이다. 일반적으로 사육자들이 이러한 것을 잘 알면서 안일과 타성, 인습, 정신 등으로 개선되지 못하고 손해를 보는 경우가 많다. 사육자들에게 현 실정에 입각하여 주의할 점을 제기하므로서 유의하여 시정할 것을 부탁하고자 한다.

• Journal of the Korean Ceramic Society
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• v.26 no.3
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• pp.297-304
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• 1989

The dielectric properties of SrTiO3 GBL Capacitor have been investigaetd as a function of the second heat treatment time and the amount of Ta. The grain size of semiconductive SrTiO3 after sintering at 1,46$0^{\circ}C$ for 4 hours in N2/H2 atmosphere increased as the amount of Ta increased, and then decreased as the amount of Ta exceed 0.01 mole. Also, the dielectric constant after the second heat treatment showed the same tendency. When the semiconductive SrTiO2 was second heat treated at 1,10$0^{\circ}C$ in air with varying time, the dielectric constant increased as the second heat treatment time increased up to 60 minutes, and then decreased as the time became longer than 60 minutes.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2006.05a
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• pp.334-337
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• 2006

외과수술용 핸드피스는 현재 국내 외 병원에서 사용되고 있는 수술 장비 중 필수 보유 장비이다. 선진수술 기법인 인공관절대체수술 시 뼈(Bone) 절단, 다듬질, 구멍등 초섬세 가공을 목적으로 하는 기기이다. 기존의 공압식(Air Type)은 수술 시 많은 양의 질소(N2 Gas)가 소모됨으로써 질소탱크 보관에 많은 공간이 필요하고 잦은 교체를 필요로 한다. 또한 기계소음과 공압식 호스의 이동으로 시술자와 환자사이에 불편함이 발생하고 감염의 위험성이 있으므로 최근에는 충전식을 선호하고 있다. 이러한 이유로 기존의 공압식을 대체할 배터리형 외과수술용 핸드피스를 연구하게 되었다.

• The Journal of the Convergence on Culture Technology
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• v.9 no.1
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• pp.69-74
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• 2023

The design methods using patterns have been used in various design fields. Both utility and results have also developed a lot, so that patterns occupy an essential parts in designs. Patterns are often used in various techniques in designing ornaments. However, both time and excessive effort concentrations restricted ornaments designs due to the nature of the craft production techniques by repeated patterns. Therefore, in this study, the traditional craft methods are combined by using computer programs in the applications, repetitions, arrangements of patterns for the manufacturing of ornaments.

• Korean Journal of Childcare and Education
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• v.6 no.3
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• pp.153-174
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• 2010

The purpose of this research was to investigate the effects of servant leadership, teacher development stage and organizational effectiveness. Subjects in this study were 259 teachers working at kindergartens and child care centers in Seoul and the Capital area of Korea. Servant Leadership Questionnaire(Kim, 2004), Teacher Development Stage Questionnaire(Lee, 2007), Organizational Commitment Questionnaire(Kim, 1998), Job Satisfaction Questionnaire(Kim, 2007), Teacher Job Satisfaction Questionnaire(Noh, 2001), and Job Performance Questionnaire(Kim, 1983) were used. Descriptive statistics, T-tests, Pearson's correlation, and hierarchical regression analysis were performed. Results showed that servant leadership, teacher development stage and organizational effectiveness were highly correlated with one another. Variables of servant leadership and teacher development were significant predictors of organizational effectiveness. Conclusions suggest that organizational effectiveness was multiply determined.

• Journal of Applied Biological Chemistry
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• v.53 no.1
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• pp.44-50
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• 2010

Tae-Um-Jo-wee-Tang (TUJWT) and Do-Dam-Tang (DDT) have been used as an anti-obesity herbal medicine but their effect and mechanism of action have not been studied. We investigated the effects of TUJWT and DDT on energy and glucose homeostasis using Sprague Dawley female rats with diet-induced obesity. The mechanisms of action of TUJWT and DDT were studied whether they had anti-obesity effects. Rats fed a high-fat diet were divided into 3 groups: rats in each group received 2 g water extracts of modified TUJWT and DDT, or 2 g cellulose per kg body weight (a negative control) on a daily basis. A further group was fed a low-fat diet as a positive control. We found that DDT significantly decreased body weight and body fat (mesenteric fat and retroperitoneal fat) more than the control. This decrease was due to the reduction in energy intake but no changes of energy expenditure. However, DDT increased fat oxidation as a major energy source than the control. In addition, modified TUJWT and DDT improved glucose tolerance without changing serum insulin levels during an oral glucose tolerance test. In conclusion, DDT have a better anti-obesity effect than TUJWT by decreasing energy intake in female rats with diet-induced obesity. It also improves glucose tolerance.

• The Korean Journal of Mycology
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• v.38 no.2
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• pp.89-94
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• 2010

Plant pathogenic fungi are the most diverse and drastic causal agents of crop diseases threatening stable food production all over the world. Plant have evolved efficient innate immune system to scout and counterattack fungal invasion and pathogenic fungi also developed virulence system to nullify plant resistance machinery or signaling pathways and to propagate and dominate within their niche. A growing body of evidences suggests that post translational modifications (PTMs) and selective/nonselective degradations of proteins involved in virulence expression of plant pathogenic fungi and plant defense machinery should play pivotal roles during the compatible and incompatible interactions. This review elucidates recent investigations about the effects of PTMs and protein degradations on host defense and fungal pathogens' invasions.

• Journal of Environmental Policy
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• v.6 no.4
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• pp.83-101
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• 2007

We try to analyze the relationship between environmental and financial performance in the Korean manufacturing sector. The lack of reliable information on company-level environmental performance in Korea has inhibited research on this subject. This paper utilizes an objective data set called 'Monthly Environmental Violations Report,' published by the Korean Ministry of Environment, among others, in measuring the environmental performance of the listed companies. The result shows that low polluters tend to perform better financially than high polluters. In addition, the correlation between positive environmental performance and financial performance turns out to be statistically more significant than negative environmental and financial performance.

• 전자공학회논문지 IE
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• v.43 no.4
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• pp.37-42
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• 2006

This paper proposes a adaptive video watermarking algorithm according to bitrate and motion vector size in MPEG2 system. The watermark strength in the I-frames is adapted for quantization step size and the strength in the P-B-frames is adapted for quantization step size and motion vector of macroblock to make the watermark more robust against the accompanying degradation due to aggressively compression. A realtime watermark extraction is done directly in the DCT domain during MPEG decoding without full decoding of MPEG video. The experimental simulations show that the video quality results almost invisible difference between the watermarked frames and the original frames and the watermark is resistant to frame dropping, MPEG compression, GoP conversion and low pass filter attacks.