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Temperature Distribution Measurement of Au Micro- Heater in Microfluidic Channel using IR Microscope
손정민,이준형,김정우,조영학 한국정밀공학회 2015 International Journal of Precision Engineering and Vol.16 No.2
The temperature control and measurement of micro-heater in microfluidic devices are very essential in various application fields suchas gas sensors, flow sensors and bio-sensors. In this study, the temperature of a micro-heater was measured while applying voltagesto micro-heaters with 100 μm width in microfluidic devices using infrared microscope. The Au micro-heater was fabricated onto asapphire substrate with good infrared transmission. In order to measure the temperature of Au micro-heater from the back side ofsapphire substrate using infrared microscope, the adhesion layer was not used during e-beam evaporation. To overcome the pooradhesion force between sapphire substrate and Au thin-film, thermal annealing was carried out at 400oC. This measurement methodenables us directly to measure the IR emissivity of Au micro-heater in aqueous media without infrared diffraction, absolution andreflection. Based on the calibration curve, we could measure the real temperature of Au micro-heater with 100 μm width atatmospheric environment and in aqueous media. Consequently, we could measure the temperature range at atmosphere and in DIwater. The companion computational fluid dynamics simulation studies showed that the measured temperature of Au micro-heater wasin accordance with the simulated results within 5 K in average sense.
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CEO의 과신성향이 글로벌 다각화에 미치는 영향 : 시장 지배력의 조절효과를 중심으로
손정민,양영수 한국국제경영관리학회 2024 국제경영리뷰 Vol.28 No.4
본 연구는 행동 대리인이론(Behavioral Agency Theory)을 기반으로 과신성향이 글로벌 다각화에 미치는 영향을 실증적으로 분석 하였다. 또한, 이러한 관계를 조절할 것이라고 예상되는 국내 시장에서의 지배력이라는 기업의 상황 변수를 조절 변수로 상정하고, 과 신성향과 글로벌 다각화 간의 관계에 어떠한 조절효과를 보이는지 분석하였다. 이를 위해 2012년부터 2019년까지 한국 유가증권 시 장에 상장된 462개의 제조업체를 대상으로 GLS(Generalized Least Squares) 방법으로 분석하였다. 실증분석 결과, 과신성향은 글로 벌 다각화에 긍정적인 영향을 미치는 것으로 나타났으며, 기업의 국내 시장에서의 지배력은 이러한 관계를 부(-)의 방향으로 조절하 는 것으로 나타났다. 본 연구는 CEO의 특성에 따른 영향을 행동 대리인이론이라는 새로운 관점으로 분석하였으며, 조절변수로써 시 장 지배력이라는 전략 관련 변수를 새롭게 규명함으로써 시사점을 제공할 것으로 보인다. This study conducts an empirical analysis of the impact of CEO overconfidence on global diversification, grounded in Behavioral Agency Theory. Additionally, it incorporates the firm’s environmental factors, such as domestic market power, as a moderating variable to examine its moderating effects on the relationship between CEO overconfidence and global diversification. To test the hypotheses, the analysis utilized a dataset comprising 3,696 firm-year observations from publicly listed manufacturing companies over the period 2012–2019. The key findings are summarized as follows. First, CEOs' overconfidence was found to exert a positive influence on global diversification. These findings align with prior research indicating that overconfidence often stems from an excessive belief in one’s own abilities and a propensity for risk-taking. This result corroborates the argument that overconfident managers are more likely to actively pursue global diversification strategies, driven by an underestimation of risks and a strong aspiration for success. Second, the study reveals that the positive effect of overconfidence on global diversification is moderated by the firm's market power in a negative relationship. These results suggest that when a firm has market power in its domestic market, overconfident CEOs are found to be satisfied with the current state and prefer maximizing immediate domestic profits to demonstrate their abilities, rather than focusing on long-term performance through global diversification. These findings provide important insights into the interaction between managerial traits, organizational context, and strategic decision-making, contributing to the broader understanding of global diversification dynamics.
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손정민,이동원,성은영,송상헌,이수봉,강진,양병윤,이수진,최종렬,이규섭,곽임수 대한의학회 2010 Journal of Korean medical science Vol.25 No.9
The authors report a case of acute kidney injury (AKI) resulting from menstruation-related disseminated intravascular coagulation (DIC) in an adenomyosis patient. A 40-yr-old woman who had received gonadotropin for ovulation induction therapy presented with anuria and an elevated serum creatinine level. Her medical history showed primary infertility with diffuse adenomyosis. On admission, her pregnancy test was negative and her menstrual cycle had started 1 day previously. Laboratory data were consistent with DIC,and it was believed to be related to myometrial injury resulting from heavy intramyometrial menstrual flow. Gonadotropin is considered to play an important role in the development of fulminant DIC. This rare case suggests that physicians should be aware that gonadotropin may provoke fulminant DIC in women with adenomyosis.
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아토피 피부염에서 유전자 연구와 사상체질의학적 접근의 상관성에 관한 문헌적 고찰
손정민,최인화,Son, Jung-Min,Choi, In-Hwa 대한한방안이비인후피부과학회 2005 한방안이비인후피부과학회지 Vol.18 No.2
Objectives: The objective of this study is to investigate the correlation between genetic studies on atopic dermatitis. sasang constitution, and sasang constitional study on atopic dermatitis. Methods: We retrieved data on PubMed for the papers of genetic study on atopic dermatitis. And for the papers on genetic study of sasang constitution and sasang constitional study of atopic dermatitis, we referred to papers have reported on domestic medical journal and domestic korean medicine journal. And we investigated correlations among the studies. Results: 1. There are two studies on genetic study on atopic dermatitis. One has been performed to find out genes related to atopic dermatitis by case-control study. The other has been to investigate the correlation between atopic dermatitis and the genes their functions were well-known. 2. Gene study on sasang constitution was performed to observe the distribution of the genes which is related with characteristics of sasang constitution, but there was no significant maldistribution of the genes. 3. There was no correlation between genetic study on atopic dermatitis and genetic study on sasang constitution. Conclusion & Discussion: In the Sasang constitutional study of atopic dermatitis, it seems that further studies on genes related to characteristics of skin, character affecting on behavior, and neurobiological difference among Sasang constitution are required as well as studies on distribution of genes related atopic dermatitis.
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