NH₃-O₂-Ar 혼합기체의 점화 과정에서 H₂기체의 첨가 효과에 관한 연구

신권수,배균택 崇實大學校 2000 論文集 Vol.30 No.1

The addition effect of H₂on ignition of NH₃-O₂-Ar mixtures was examined in the temperature range of 1521-2193 K and the pressures in the range of 0.86-1.78 bar behind reflected shock waves. The ignition delay times were measured by monitoring pressure profiles and the OH emissions at 1.0 cm from the end wall. To complement the experiment, computer modeling study of the ignition of NH₃-O₂-Ar mixtures was carried out using various mechanisms reported previously.

고령 장애인의 일(WORK) 경험과 욕구에 관한 연구 : 뇌병변 장애를 중심으로

이효성,김근아,김태연,오정은 한국장애인고용촉진공단 고용개발원 2007 장애와 고용 Vol.17 No.2

본 연구의 목적은 고령이면서 장애를 동시에 경험하고 있는 고령 장애인들의 일 경험과 욕구에 관한 특성을 당사자의 관점에서 이해하는 것이다. 이러한 목적을 달성하기 위해 50세 이상 뇌병변장애인 13명을 대상으로 일 경험과 욕구에 관한 개방형식의 질문으로 심층 인터뷰를 실시하여 그 결과를 분석함으로써 고령 장애인 당사자의 일 경험과 욕구에 대한 심층적 이해와 현상의 의미를 깊이 있게 파악하고자 하였다. 분석결과, 고령 뇌병변장애인들은 일을 하고자 하는 높은 욕구를 가지고 있으며 일을 통해 삶의 의미와 보람을 찾고자 하나 현실적으로는 장애와 고령, 그리고 만성질환자라는 삼중고 속에서 “일하기” 에 상당한 제약을 받는 것으로 나타났다. 이러한 연구결과는 지금까지 고용정책에서 소외되었던 고령 장애인의 ‘일’ 에 관한 정책적 개입의 필요성을 강력하게 시사해 주고 있다. The purpose of this study is to understand the characteristics of the experiences and needs for work of aged people with disabilities who experience both old age and disability from their viewpoint. To this end, this study conducted in-depth interviews with 13 people aged 50 or older with encephalopathic disabilities by open-ended questions regarding their experiences and needs for work, and analyzed the results so as to more deeply understand the experiences and needs for work of aged people with disabilities as well as the implications of the present situation. The analysis results showed that aged people with disabilities have high needs for work and try to find the meaning and worth of life through work, but in reality face considerable limitations to ‘working’ in the triple handicaps of disability, old age, and chronic disease. The results of this study strongly suggest the need for policy intervention in the ‘work’ of aged people with disabilities who have been neglected by employment policies until now.

환경친화성 계면활성제를 이용한 어병균의 살균효과

최상원,정관용,오남희,김은영,방정환,김정우,여문환 한국환경과학회 2000 한국환경과학회지 Vol.9 No.5

The antibacterial effect amino acid-copper(Ⅱ) surfactant on fish pathogens was studied. Fish pathogens of Edwardsiella tarda, Vibrio anguillarum, Aeromonas hydrophila and Streptococcus sp. were selected, cultured in nutrient agar and adjusted at 2 × 10 exp (5)∼10 exp (6) CFU/㎖ in phosphate buffer saline before the addtion of amino acid-copper(Ⅱ) surfactant with different concentrations. All tested pathogens died within 1 hour with 1 ppm of amino acid-copper(Ⅱ) surfactant. In comparison with formalin and ET, amino acid-copper(Ⅱ) surfactnat was more effective in antibacterial capacity.

중증 미만성 뇌축색손상 환자의 MRI소견 및 임상적 고찰

김한겸,김성호,송시헌,김관태,김윤 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.1

The distribution and extent of traumatic lesions were evaluated with MRI in 31 patients with diffuse axonal injuries(DAI). Authors also analyzed patients with diffuse axonal injury, clinically. The patients with DAI showed statistically significant lower incidence of lucid interval, fracture of the skull and intracranial hematoma. Combined injuries, intracrnial hematomas and distribution of lisions were porved to be poor prognostic factors of DAI. Diffuse axonal injury is most commonly involved in the white matter of the frontal and temporal loves and the splenium of the corpus callosum. Patients with lisions in brainstem and cerebellum revealed worst prognoses. In our studies, the sensitivities of the imaging techniques for diffuse axonal injures were 7.3% with CT scan, 75.6% with T1WI, and with 97.6% in T2WI of MRI, respectively. The authors concluded that MRI has clear advantages over CT in evaluating diffuse axonal injuries.

STUDIES ON CONSTITUTION-ACUPUNCTURE THERAPY

Kuan, Dowon 명지대학교 1974 明大論文集 Vol.7 No.-

Since the theoretical system of constitution-acupuncture based on the theory of 8 constitutions developed by the author was reported at the 1st World con-gress of Acupuncture, held in Tokyo, Japan in 1965, the author has continued studies on extensive therapeutical formulas of the constitution-acupuncture. Even in case of an identical disease, the pathological theory and therapeutical need of each constitution are varied with each other in terms of the theory of 8 constitutions. Accordingly, the therapeutical method of each constitution should also be varied. This can be fully justified by the fact that each constitution has 9 formulas and therefore the 8 constitutions have a total of 72 formulas which has been successfully methodized by the author (not reported in part). Those exclusive formulas which have been newly developed but can not be applied to other constitutions than those referred to above are anmed as "field formulas" of the 8 constitutional fields.(cf. Explanatory Notes) However, the therapeutical capacity of individual field formula is not perfect, since those therapeutical formulas which may demonstrate strong healing power have been established by combining methodologically 8 formulas centering arou-nd one characteristic formula out of the 9 formulas of each constitution. The present studies carried out through clinical observations over a hundred thousand times in the past 7 years, have made it possible to obtain the results as expected in the successful classification of a total of 56 therapeutical formulas into 'Fundamental Formula', 'Vitalization Formula', 'Bactericidal Formula', 'Paralysis Formula', 'Psycho Formula' and 'Inflammation Formula', This paper deals mainly with these formulas of the 8 constitutions. The symbols and terms used herein are those which have been revised after the first paper was reported. For the convenience of the reader, the revised symbols and terms are explained hereunder together with the illustration of simplified constitutional pulse diagnosis. This paper represents the second report published in the Korean Central Journal of Medicine in September, 1973. It is noted, however, that the figures and formulas created or methodized by the author are defined as the 'Kuan's Figure' and 'Kuan's Formula Table' with fixed serial number respectively.

Optimization of Operational and Constitutional Geometric Parameters for Acoustic energy Output

Kuan Chen,Seung Jin Oh,Farrukh Israr,Sanket Kolhe,Sang Woong Shin,Wongee Chun 한국에너지기후변화학회 2013 에너지기후변화학회지 Vol.8 No.2

These days, much attention has been drawn to the conversion of low grade energy into any usable form of high grade energy, such as acoustic energy. Many efforts have been made in this regard as a means to abate carbon (CO2) emissions. This paper studied the effects of geometric parameters and varying input power on acoustic energy output. The acoustic laser kit (Garret 2000) was used for the construction of TA lasers. A series of sound pressure level measurements in different orientations did not differ significantly confirming that the sound wave generated could be assumed as a spherical wave. An increase in acoustic pressure was recorded with respective increase in input power, stack and resonator tube lengths owing to their relative influence over heat transfer rate and critical temperature gradient across the stack.

Ginseng essence, a medicinal and edible herbal formulation, ameliorates carbon tetrachloride-induced oxidative stress and liver injury in rats

Kuan-Hung Lu,Ching-Yi Weng,Wei-Cheng Chen,Lee-Yan Sheen 고려인삼학회 2017 Journal of Ginseng Research Vol.41 No.3

Background: Ginseng essence (GE) is a formulation comprising four medicinal and edible herbs including ginseng (Panax ginseng), American ginseng (Panax quinquefolius), lotus seed (Nelumbo nucifera), and lily bulb (Lilium longiflorum). This study was aimed at investigating the hepatoprotective effect of GE against carbon tetrachloride (CCl4)-induced liver injury in rats. Methods: We treated Wistar rats daily with low, medium, and high [0.625 g/kg body weight (bw), 1.25 g/ kg bw, and 3.125 g/kg bw, respectively] doses of GE for 9 wk. After the 1st wk of treatment, rats were administered 20% CCl4 (1.5 mL/kg bw) two times a week to induce liver damage until the treatment ended. Results: Serum biochemical analysis indicated that GE ameliorated the elevation of aspartate aminotransferase and alanine aminotransferase and albumin decline in CCl4-treated rats. Moreover, CCl4- induced accumulation of hepatic total cholesterol and triglyceride was inhibited. The hepatoprotective effects of GE involved enhancing the hepatic antioxidant defense system including glutathione, glutathione peroxidase, glutathione reductase, glutathione S-transferase, superoxide dismutase, and catalase. In addition, histological analysis using hematoxylin and eosin and Masson’s trichrome staining showed that GE inhibited CCl4-induced hepatic inflammation and fibrosis. Furthermore, immunohistochemical staining of alpha-smooth muscle actin indicated that CCl4-triggered activation of hepatic stellate cells was reduced. Conclusion: These findings demonstrate that GE improves CCl4-induced liver inflammation and fibrosis by attenuating oxidative stress. Therefore, GE could be a promising hepatoprotective herbal formulation for future development of phytotherapy.

Construction and Testing of a Radiation-beam Powered TA (ThermoAcoustic) Washer for Grease Removal

Kuan Chen,David H. DaCosta,Sangwoong Shin,Seung Jin Oh,Wongee Chun 한국에너지기후변화학회 2013 에너지기후변화학회지 Vol.8 No.2

A small washer powered directly and solely by thermal radiation was constructed and tested to explore the feasibility of using solar energy or other types of thermal radiation for washing and cleaning. In principle, TA (ThermoAcoustic) washers have the benefits of simpler design and operation and fewer energy conversion processes, thus should be more energy efficient and cost less than electric washing/cleaning systems. The prototype TA converter we constructed could sustain itself with consistent fluid oscillations for more than 20 minutes when powered by either concentrated solar radiation or an IR (infrared) heater. The frequencies of water oscillations in the wash chamber ranged from 2.6 to 3.6 Hz. The overall conversion efficiency was lower than the typical efficiencies of TA engines. Change in water temperature had little effect on the oscillatory flow in the TA washer due to its low efficiency. On the other hand higher water temperatures enhanced grease removal considerably in our tests. Methods for measuring the overall conversion efficiency, frictional loss, and grease removal of the TA washing system we designed were developed and discussed.

MUTUAL FUND ADVERTISING AND FUND CONSUMER REDEMPTION BEHAVIOR

Kuan-Ling Lai,Miao-Ling Chen,Chi-Lu Peng 글로벌지식마케팅경영학회 2014 Global Marketing Conference Vol.2014 No.5

This study employs a trading dataset from a top investment bank in Taiwan to examine whether and how mutual fund advertising influences fund consumers’ redemption behavior, and whether the effect of advertising differs between small- and large-amount fund consumers. The evidence of this study shows that, on average, fund consumers redeem more non-advertised funds as their returns increase, while fund advertising slows their redemptions. The results from quantile regression show that fund advertising plays an important role in affecting redemption-performance sensitivity of large-amount and medium-amount investors. After taking advertising into account, large-amount and medium-amount investors reduce their fund redemptions. The results suggest that advertising, as a transmission of information, varies with investors’ wealth levels and that these differences in advertising matter to investors’ redemptions. This study contributes to understanding the role of advertising in fund consumers’ realized behavior and is useful for fund companies because they can more efficiently allocate limited resources such as advertising to support the growth of fund assets under management.

Credit Rating Anomaly in Taiwan Stock Market

Kuan-Cheng Ko,Shinn-Juh Lin,Hsiang-Hui Chu,Hsiao-Wei Ho 한국재무학회 2012 한국재무학회 학술대회 Vol.2012 No.09

Rational asset-pricing theory asserts that higher risk should be accompanied by higher expected return. The credit-risk puzzle, however, states a negative cross- sectional relationship between credit risk and future stock returns (Dichev, 1998; Grin and Lemmon, 2002; Campbell et al., 2008; Avramov et al., 2009). This pa- per examines the credit-risk puzzle using an independent dataset from Taiwan's stock market. We document the existence of the credit-risk premium in both portfolios and individual stocks, and demonstrate that it can not be explained by well-known asset-pricing models which include the CAPM, Fama and French's (1993) three-factor model, and Liu's (2006) liquidity-augmented CAPM. Unlike the evidence in the U.S. market, rating downgrades only have limited impact on stock returns in Taiwan. Further analysis indicates that credit rating serves as a better proxy for distress risk, and is thus priced in Taiwan's stock market.