• Journal of information and communication convergence engineering
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• 제17권2호
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• pp.161-165
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• 2019

In this study, zinc tin oxide (ZTO) thin-film transistors are researched to observe the correlation between the barrier potential and electrical properties. Although much research has been conducted on the electronic radiation from Schottky contacts in semiconductor devices, research on electronic radiation that occurs at voltages above the threshold voltage is lacking. Furthermore, the current phenomena occurring below the threshold voltage need to be studied. Bidirectional transistors exhibit current flows below the threshold voltage, and studying the characteristics of these currents can help understand the problems associated with leakage current. A factor that affects the stability of bidirectional transistors is the potential barrier to the Schottky contact. It has been confirmed that Schottky contacts increase the efficiency of the element in semiconductor devices, by cutting off the leakage current, and that the recombination at the PN junction is closely related to the Schottky contacts. The bidirectional characteristics of the transistors are controlled by the space-charge limiting currents generated by the barrier potentials of the SiOC insulated film. Space-charge limiting currents caused by the tunneling phenomenon or quantum effect are new conduction mechanisms in semiconductors, and are different from the leakage current.

• Korea Journal of Cosmetic Science
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• 제1권1호
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• pp.19-29
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• 2019

In this work, we fabricated liquid crystal (LC) emulsions with fatty alcohol in order to stabilize high content ceramide in cosmetic formulation. We investigated the role of fatty alcohol and surfactant in the formation of higher order structure. As a result, we found that they play a crucial role to form higher order structure. SAXS study shows that ceramide can be incorporated up to 3% in cosmetic formulation with higher order structure and its stability was maintained up to 12 weeks at room temperature. According to WAXS study, the higher order structure can suppress the re-crystallization of ceramide in cosmetic formulation. Finally, we performed in vivo skin barrier recovery test for the damaged skin. LC emulsions with ceramide and O/W emulsions show significant effect in skin barrier recovery at D 1, D 2 and D 6 compared to the untreated condition. While only LC emulsions show significant skin recovery effect at D 14. We expect that LC emulsions are the promising skin carrier to stabilize ceramide and LC emulsions with ceramide can improve the skin barrier function.

• 융합정보논문지
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• 제11권5호
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• pp.130-137
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• 2021

본 연구는 코로나19와 같은 상황에서 대학생의 진로장벽과 취업준비행동 관계에서 진로적응성과 자아탄력성의 병렬매개효과와 자아탄력성의 조절된 매개효과를 실증 분석하는데 목적이 있다. 이를 위해 K대학교 238명을 대상으로 설문 조사를 하였다. 수집된 자료는 상관분석과 Process macro를 활용하여 연구모형을 검증하였다. 본 연구결과는 첫째, 진로장벽, 진로적응성, 자아탄력성, 취업준비행동 모두 정적인 상관관계를 나타냈다. 둘째, 진로장벽과 취업준비행동 관계에서 진로적응성과 자아탄력성의 매개 효과가 있는 것으로 나타났다. 셋째, 자아탄력성은 조절된 매개 효과가 있는 것으로 나타났다. 본 연구를 바탕으로 코로나19와 같은 상황에서 취업준비행동에 대한 제언과 후속연구를 위한 논의를 하였다.

• 디지털산업정보학회논문지
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• 제9권2호
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• pp.151-163
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• 2013

It goes without saying that the technology innovation plays an important role in the sustainable growth of the firm in the global economy. It, however, is not easy to fulfill this simple and obvious fact. Because there are a lot of barriers hindering innovation activities of firms and innovations are interrupted or don't even attempts by this barriers. So in this paper, I study barriers of firms that try to innovation and how much negative impact exist on firm's innovation performance by that. And also I try to find influence on firm's performance because of declined innovation activities. To prove this, KIS(Korean Innovation Survey) 2008, which was surveyed by STEPI(Science and Technology Policy Institute), is used to find relationships among variables; innovation barriers, innovation activities and firm's performance. In the result, I find that financial barrier influence negatively to the process innovation with small business, capable barrier influence negatively to the process innovation with large business and organizational barrier influence negatively to the process innovation with both small and large business. And, it also appear that organizational barrier has not moderating effect but process efficiency has moderating effect significantly with small business that have more positive effect.

• 한국의류산업학회지
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• 제18권5호
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• pp.617-624
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• 2016

The purposes of this study was to investigate impacts of loyalty program value on store loyalty through customer satisfaction and switching barrier. This study suggests some basis about the direction guidance for successful store-running marketing activities and beauty service related researches. A total of 986 usable questionnaires were obtained from female adults of Busan. Data were analyzed by frequency analysis, correlation analysis, factor analysis using SPSS for Window 22.0 and confirmatory factor analysis and structural equation model analysis by AMOS 22.0. The results suggested that, loyalty program value benefits(hedonic benefits and utilitarian benefits) had positive effect on customer satisfaction, and loyalty program value costs(hedonic costs and utilitarian costs) had oppositive effect on customer satisfaction. The impact of hedonic benefits of the loyalty program values was the largest. Customer satisfaction and switching barrier directly affect store loyalty. The customer satisfaction affected the store loyalty indirectly but the direct effect was bigger.

• 대한한의학회지
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• 제28권4호
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• pp.18-26
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• 2007

Objective : To study the effect of the Insamyangyoung-tang(ISYT) extract on the skin barrier function, the skin pH, skin humidity and transepidermal water loss(TEWL) were measured and histological changes were observed in DNCB(2,4-dinitrochloro-benzen)-induced contact dermatitis(CD) hairless mice. Methods : The male hairless mice were divided into three groups. Each group consisted of 15 mice. The normal group which had acetone- olive oil applied. The control group which had intentionally induced CD by DNCB and it was fed normal saline orally. The ISYT group which had intentionally induced CD by DNCB and it was fed ISYT extract orally for 7 days. The three groups were checked 24h, 48h and 72h later after inducing CD, and the skin pH, skin humidity and TEWL were observed. Tissue samples were taken, and damage to the epithelial cell was observed. Statistical analysis was performed by using one way-ANOVA: significance was set at p values less than 5% (p<0.05). Results : ISYTextract efficiently maintained the pH balance, it kept the skin humidity at a normal level, and it inhibited TEWL of the DNCB-induced CD hairless mouse. The damage to the epithelium was decreased and the regeneration power of the skin was increased in the ISYT group. Conclusion : Insamyangyoung-tang has a good effect on the skin barrier function of DNCB induced contact dermatitis hairless mice.

• Journal of Applied Biological Chemistry
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• 제54권3호
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• pp.190-196
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• 2011

Effectiveness of edible coatings containing soy protein isolate (SPI), in reducing oxidative browning and moisture loss during storage ($4^{\circ}C$) of cut apples, potatoes, carrots, and onions was investigated. The SPI coatings were shown to have antioxidative activity. Furthermore, addition of carboxymethyl cellulose (CMC) to the formulations significantly improved its antioxidative activity. Oxidative discoloration, as determined by Commission Internationale De I'Eclairage (CIE) lightness ($L^*$), redness ($a^*$), and yellowness ($b^*$) color scale, was significantly reduced (p <0.05) by SPI coating treatments over a storage time of 120 min. Loss of lightness was reduced by SPI coatings with and without CMC. These respectively showed 4.03 and 3.71% change of $L^*$ value compared to 8.56% for control. Browning of the control in cut potatoes was significantly increased by 106.6% in contrast to 34.3 and 35.2% for SPI coatings with and without CMC, respectively. The $b^*$ values also reflected effectiveness of SPI. Moisture barrier effect was significantly better for the treatments, compared to the control. SPI coatings reduced moisture loss in apples and potatoes, respectively, by 21.3 and 29.6% over the control. Cut onions did not show any treatment effect both in terms of browning and moisture loss. SPI coatings prove to be good moisture barrier and antioxidative property.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2010년도 하계학술대회 논문집
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• pp.348-348
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• 2010

Nanostructures have great potential in various devices due to the their promising electronic and optical properties. Nano-patterned the front surface of a solar cell generally results in improved performance, mostly due to an increase in the short-circuit current by the incident photons strike the cell surface at an angle. In this work, we investigate AFM-assisted nano-patterned field effect transistors (FETs) with vairous silicon oxide distance value D, from ${\sim}0.5{\mu}m$ to $1{\mu}m$. Also, we compared the electro-optical characteristics of the patterned FETs and the non-patterned FETs (reference device) based on both 2-dimensional simulation and experimental results for the wavelength from 100nm to 900nm. In addition, we report electric characteristics for illuminated surface in schottky barrier field effect transistors (SB-FETs).

• Transactions on Electrical and Electronic Materials
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• 제18권6호
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• pp.323-329
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• 2017

This reports the electrical behavior, bonding structure and Schottky contact of gallium-zinc-oxide (GZO) thin film annealed at $100{\sim}400^{\circ}C$. The mobility of GZO with high density of PL spectra and crystal structure was also increased because of the structural matching between GZO and Si substrate of a crystal structure. However, the GZO annealed at $200^{\circ}C$ with an amorphous structure had the highest mobility as a result of a band to band tunneling effect. The mobility of GZO treated at low annealing temperatures under $200^{\circ}C$ increased at the GZO with an amorphous structure, but that at high temperatures over $200^{\circ}C$ also increased when it was the GZO of a crystal structure. The mobility of GZO with a Schottky barrier (SB) was mostly increased because of the effect of surface currents as well as the additional internal potential difference.

• 경영과정보연구
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• 제36권2호
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• pp.223-237
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• 2017

전환장벽은 고객의 이탈을 막는다는 점에서 주로 긍정적인 측면이 강조되었으나, 최근에는 기업이 설정한 전환장벽이 장기적으로 해로울 수 있음이 논의되기 시작하였다(Jones et al. 2000; 정윤희, 2012). 전환장벽의 부정적 영향에 관한 기존연구에서는 전환장벽이 소비자의 전환의 자유를 방해한다는 점에서 부정적 심리반응을 이끌 수 있음은 보여주었으나, 당장 기업에 줄 수 있는 부정적인 영향에 대한 논의는 부족하였다. 따라서 본 연구에서는 전환장벽으로 인해 전환을 못하는 상황에 서비스 실패상황에 관한 연구를 적용하여 소비자들의 전환장벽에 대한 부정적 감정과 불평행동에 대한 연구를 진행하고자 하였다. 전환을 어렵게 하는 전환장벽의 귀인(내적 혹은 외적)에 따라 후회와 원망을 경험하게 되고 이는 수용, 불평행동, 부정적 구전으로 이어질 것으로 가정하였다. 구조방정식 모형을 이용해 가설 검증한 결과, 내적귀인은 후회에 긍정적 영향을 주고, 외적귀인은 원망에 긍정적 영향을 주는 것으로 나타났다. 그리고 후회는 수용과 불평행동에 영향을 주고, 원망은 불평행동과 부정적 구전에 긍정적 영향을 미침을 확인하였다. 이러한 결과는 전환장벽이 고객들의 부정적 감정과 불평행동을 이끌어 기업에 즉각적 피해를 줄 수 있음을 보여줌으로써 기존연구를 확장하고 있으며, 전환장벽에 대한 신중한 실무적 활용을 시사한다.