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이영수,조주현 한국산업조직학회 2003 産業組織硏究 Vol.11 No.2
본 연구는 기술개발 속도가 현저하게 이루어지고 있는 컴퓨터 및 주변기기(모니터, 프린터)를 대상으로 품질조정 가격지수를 산정하였다. 또한, 이러한 품질조정 가격지수가 생산자물가지수를 포함하여 ICT부문의 생산자물가지수에 미치는 효과를 살펴보았다. 품질조정 가격지수를 구하기 위해 헤도닉방법을 이용하였으며, 추정방법으로는 더미변수를 이용하여 추정하였다. 실증분석 결과를 요약하면 다음과 같다. 첫째, 컴퓨터 및 주변기기의 품질조정 가격하락 효과 분석에서 컴퓨터 본체의 가격지수는 1990년-2002년 동안 연평균 26.4%p 추가적으로 하락하는 것으로 나타났다. 모니터와 프린터의 경우 각각 연평균 15%p, 11.5%p의 추가적인 가격하락 효과가 있는 것으로 나타났다. 둘째, 컴퓨터 및 주변기기의 물가지수는 품질향상으로 1991-2002년 동안 연평균 11.54%p의 추가적인 가격하락을 보였다. 이러한 컴퓨터 본체, 모니터 및 프린터의 품질개선 효과로 사무회계용 기기의 물가지수는 추가적으로 연평균 10.83%p 하락했으며, ICT부문의 물가지수 역시 연평균 1.542%p 추가적인 하락이 나타났다. 또한 이러한 품질개선에 따른 추가적인 물가하락은 생산자물가지수에도 영향을 주어 1991년-2002년 기간동안 연평균 1.495%p의 추가적인 물가하락을 보였다. 셋째 본 연구와 이영수 외(2002)의 연구를 비교하여 볼 때 컴퓨터 본체의 품질조정으로 인한 가격하락 효과 추이는 비슷하게 나타나고 있어 본 연구의 결과가 안정적이고 강건한(robust)한 추정결과임을 알 수 있었다. In this paper, we attempt to calculate a quality-adjusted price indexes for the personal computer and peripheral devices(monitor, printer) that have experienced rapid technological and market developments. Moreover we analyze the PPI of ICT including the quality-adjusted price index. To calculate a quality-adjusted price index we utilize the framework of the hedonic approach and dummy variable estimation method. The conclusions which can be drawn from our empirical study are these: 1) personal computer, monitor, printer price indexes decline additionally at about 26.4%p, 15%p, 11.5%p respectively over the 1990∼2002 time period 2) price indexes in office accounting machinery and ICT decline additionally 10.83%p, 11.54%p respectively 3) PPI declines additionally 1.542%p per year considering the quality changes 4) comparing the previous work we know that our empirical results are stable and robust.
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이영수,류경옥,김희택,박도현 한국화학공학회 1992 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.30 No.6
황화수소를 제거한 흡착제의 산화재생반응에 대한 여러 가지 실험변수들의 영향을 살펴보기 위하여 반응조건을 변화시키면서 배출되는 가스(SO₂)를 G.C.로 분석하였고, 이에 따른 특성을 XRD, SEM, TGA-DTA를 이용하여 분석하였다. 반응온도 750℃에서 반응성이 가장 좋음을 알 수 있었고 DTA-TGA분석으로 소량 첨가한 Fe₂O₃가 중요한 역할을 함을 알 수 있었다. 산소 10 vol%까지는 총 SO₂의 발생량은 비례적으로 증가하였으나 산소량이 증가할수록 급격히 감소하는 경향을 나타내었으며 총 기체유속이 증가할수록 125 ml/min까지는 총 SO₂의 발생량이 선형적으로 증가하였고 100 ml/min 이상일 경우 경막 물질전달 저항을 무시할 수 있음을 알 수 있었다. 아울러 크기가 다른 흡착제를 황화반응시킨 후 다시 재생반응을 행한 결과 입자 크기가 작을수록 SO₂ 발생량이 적었고 황화반응으로 인한 구조적 변화가 산소확산 장벽으로 작용함을 알 수 있었다. 또한 각각의 온도에서 재생된 흡착제를 650℃에서 다시 황화반응을 수행한 결과 750℃에서 재생된 흡착제가 효율적임을 알 수 있었다. In order to examine the effects of experimental variables on the oxidative regeneration of sulfided sorbents by H₂S, effluent gas (SO₂) was analyzed by G.C. with variation of reaction conditions and oxidized sorbents were characterized by XRD, SEM, and TGA-DTA. The reactivity of oxidative regeneration was maximum at 750℃ and it was revealed that the Fe₂O₃additive played an important role from the TGA-DTA analysis. Total SO₂ uptake was increased linearly as oxygen increased till 10 vol% and it was decreased drastically as oxygen increased. When the total flow rate was increased, total SO₂ uptake was increased linearly till 125 ml/min and thin-film mass transfer resistance was negligible above 100 ml/min. From the oxidative regeneration of sulfided sorbents with different particle sizes, it was found that for small particle, the SO₂ uptake was little and that the structural change formed during the sulfidation acted as the O₂ diffusion barrier. From the sulfidation at 650℃ after one sulfidation-regeneration cycle, it was found that regenerated sorbent at 750℃ was effective.
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Roles of ginsenosides in inflammasome activation
이영수 고려인삼학회 2019 Journal of Ginseng Research Vol.43 No.2
Inflammation is an innate immune response that protects the body from pathogens, toxins, and other dangers and is initiated by recognizing pathogen-associated molecular patterns or danger-associated molecular patterns by pattern-recognition receptors expressing on or in immune cells. Intracellular pattern-recognition receptors, including nucleotide-binding oligomerization domain-like receptors (NLRs), absent in melanoma 2, and cysteine aspartateespecific protease (caspase)-4/5/11 recognize various pathogen-associated molecular patterns and danger-associated molecular patterns and assemble protein complexes called “inflammasomes.” These complexes induce inflammatory responses by activating a downstream effector, caspase-1, leading to gasdermin D emediated pyroptosis and the secretion of proinflammatory cytokines, such as interleukin (IL)-1b and IL-18. Ginsenosides are natural steroid glycosides and triterpene saponins found exclusively in the plant genus Panax. Various ginsenosides have been identified, and their abilities to regulate inflammatory responses have been evaluated. These studies have suggested a link between ginsenosides and inflammasome activation in inflammatory responses. Some types of ginsenosides, including Rh1, Rg3, Rb1, compound K, chikusetsu saponin IVa, Rg5, and Rg1, have been clearly demonstrated to inhibit inflammatory responses by suppressing the activation of various inflammasomes, including the NLRP3, NLRP1, and absent in melanoma 2 inflammasomes. Ginsenosides have also been shown to inhibit caspase-1 and to decrease the expression of IL-1b and IL- 18. Given this body of evidence, the functional relationship between ginsenosides and inflammasome activation provides new insight into the understanding of the molecular mechanisms of ginsenosidemediated antiinflammatory actions. This relationship also has applications regarding the development of antiinflammatory remedies by ginsenoside-mediated targeting of inflammasomes, which could be used to prevent and treat inflammatory diseases.
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Occupational Job Stress Index의 신뢰성(信賴性) 관(關)한 연구(硏究)
이영수,Lee, Young-Soo 대한예방의학회 1980 예방의학회지 Vol.13 No.1
The Occupational Job Stress Indicies Questionnaire is a selfadministered instrument consisting of 48 questions which are designed to collect the perceived Job stress about individual. This questionnaire was translated into Korean and applied to the selected groups of 300 blue collar workers musical manufacture industy for the purpose of assessing the it's reliability from April 1. to July 30, 1980. The results obtained were as follows; 1. The range of reliability coefficients for all indices was. 45-.75 which was lower than .54-.87 of original. 2. The inter-item correlation matrix for all items comprising an index along with the intercorrelation of these items with the items comprising closely related indices. 3. The reliability of JOB SATISFACTION, INTRINSIC REWARDS and IMPORTANCE REWARDS revealed .14-.20 lower than that of original. On the point of view, some items should be adjusted in parallel with acutual situation of Korea through making a cultural comparative study and item factor analysis.
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