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교육대학생의 학습량 조사 분석 연구 : 과제물의 양과 해결을 중심으로
고대혁,허 숙,한안진,김규환 仁川敎育大學校 1994 論文集 Vol.28 No.2
University education is not enough with only lectures in order to achieve its educational goals. University is, by definition, a place where inividual academic researches and studies of professors and students are to take place. For this purpose, university students are required to do various kinds of home work, individual study, and report writing. This study tries to investigate the types and amount of individual learning tasks which is provided to the students of Inchon National Teachers University. There are various kinds of individual learning tasks : reading books, finding material, observation and experimentation, skill practice, and report writing. As the results of the study, we can find that : (1) Students are required to take more or less than 10 courses in a semester and every course require 2 or 3 reports. (2) Many students feel that the amount of individual tasks are too heavy to solve within the given time. Especially, the most heavy amount of tasks are given during the third year of university curriculum. (3) Most of the students think that individual study tasks are necessary for university education. But they hope the tasks should be inquiry-oriented rather than memory or mechanical work-oriented. (4) Students want to have a space like Curriculum Material Preparation Area(CMPA) in order to make individual learning tasks.
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Inhibition of Acetohydroxyacid Synthase by Sulfonylureas and Imidazolinones
Ahan, Tae-Woo,Kim, Dae-Whang,Choi, Jung-Do 생화학분자생물학회 1992 한국생화학회지 Vol.25 No.7
Acetohydroxyacid synthase (AHAS) is the first common enzyme in the biosynthetic pathways for valine, leucine, and isoleucine. AHAS is the target site for four classes of structually unrelated herbicides, the sulfonylurea, imidazolinone, triazolopyrimidin, and pyrimidyl-oxy-benzoate chemical families. AHAS has been partially purified from dark-grown pea shoots approximately 2,000 fold. We have synthesized new sulfonylurea and imidazolinone herbicides, and examined their biological activities using the pea enzyme. $I_{50}$ values for inhibition of AHAS by sulfonylureas and imidazolinones tested ranged from 3 to 50 nM and from 67 to about 500 nM, respectively. Sulfonylurea chlorosulfuron and imidazolinone Cadre were shown to be competitive and mixed-type inhibitor with respect to pyruvate, respectively. The inhibitions of AHAS by both sulfonylurea and imidazolinone were time-dependent and biphasic.
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Ahan, Jong-Chan,Kim, Jae-Woo,Park, Won-Hwan The Physiological Society of Korean Medicine and T 2005 동의생리병리학회지 Vol.19 No.1
According to the Chinese and Korean medicinal and herbal literature, SSG(Silsosangami) is effective for the treatment of inflammation, hyperlipemia and arteriosclerosis. The pharmacological action of SSG has been limitedly studied in regard to ischemic infarction. This herbal medicine has been shown to express diverse activities such as immunomodulating, anti-infarction, anti-allergic and anti-inflammatory effects. Antisclerotic effects of SSG in experimentally induced atherosclerosis in rabbits have also been reported. However, pharmacological mechanisms of SSG on lipid metabolism and atherosclerosis formation are poorly understood. The present paper reports the effect of extracts obtained from SSG on endotoxin-induced experimental DIC in rats. Also, these were tested for their effect on endotoxin-induced blood platelet aggregation, thrombin-induced conversion of fibrinogen and fibrinolysis in vitro experiments with aspirin as a positive agent. The anti-thrombic properties of SSG were also investigated by means of analytical parameters of bood composition. The extracts of SSG and its seven herbs, except Cnidii Rhizoma and Carthami Flos, inhibited the endotoxin-induced DIC and thrombosis in rats. Also the extract inhibited the endotoxin-induced decrease in blood platelets and fibrinogen, and endotoxin-induced increase in fibrin degradation products (FDP) on disseminated intravascular coagulation in normal rats.
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안자희(Ahan Ja-Hee) 한국체육과학회 2008 한국체육과학회지 Vol.17 No.1
This study is intended to deeply examine the health concepts perceived by the elderly and the health practices of the elderly. For the study, a survey was conducted with two subjects for total 476 old people (129 male, 347 female) in 2 halls for the aged in Seoul and 4 halls for the aged in Gyeonggido from the 16th day of August to the end of August, 2006. The exploratory statements of the elderly by two subjects were received and then they were analyzed by categorization. The results of analyzing the statements of the elderly are described as follows. 1. Health concepts were classified into 14 categories; an absence of disease, easiness of body, strong body strength & build, not being disabled, high resistance, peaceful mind, sound thinking, self-control, a harmony of body & mind, keeping a daily life, enjoyable life, getting along with friends, harmonious home, and an achievement of goal. From the result of the above categorization, health included the perception such as 'being comfortable', 'being strong', 'getting along', and 'achievement', and the subjective emotions by observation. Accordingly, the elderly perceived that a decisive factor of health was very subjective and relative. 2. Health practices were classified into 12 categories; A preventive life, correct eating habit & diet, keeping clean body, exercise, obesity prevention, rest, environment improvement, favorite food prohibition, leisure enjoyment, comfortable mind, a right thinking, and regular living habits. From the result of the above categorization, the elderly did active practices related to life for the prevention of diseases in order to keep and promote health regardless of their present health status and the behavior's effect. Also, the elderly stressed and recognized a principle of health practice from a definite aspect such as the comfortable mind and right thinking with a practical behavior such as the practical practice and favorite food prohibition.
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HBsAg 및 anti-HCV양성자 가족에 대한 감염질태 조사 연구
안찬 ( Chan Ahan ),송기용 ( Gee Yong Song ) 대한임상검사과학회 1998 대한임상검사과학회지(KJCLS) Vol.30 No.3
A total number of 81,497 sera according to the tested Hepatitis B virus surface Antigen(HBsAg) and Hepatitis C virus Antibody(anti-HCY) by EIA for study of family members infection on positive blood donors. I have examined the prevalence of HBsAg and anti-HCY in blood donors at Kyungnam Blood Center on positive blood donors in Masan and Changwon area, and the results were summarized as following. Among blood donors the prevalence of HBsAg in male(4.31%), female(2.77%) and anti-HCY in male(0.22), female(0.06%), male was significantly higher than in female. Among 24 blood donors with HBsAg positive, ten(41.7%) were within normal value<under 30lU/L, six(25.0%) of them were 30-45IU/L and two(8.3%) were 46-64lU/L and remainded six(25.0%) were higher alanine aminotranseferase(over 65lU/L), than nomal value. Among eight blood donors with anti-HCY Positive and among of them five(62.5%) were within normal value (under 30lU/L), remained people were one each for :l>-45IU/L, 46-64lU/L, over 65lU/L. HBsAg prevalence sera were seven out of 47 family members of 24 positive blood donors and anti-HCY prevalence sera was one out of 21 family members of eight positive blood donors by EIA method. Among seven with HBsAg positive, five were with HBsAg and one were anti-HCY directly infected by between, mother to infant transmission and estimated and remainning two with HBsAg positive was same with his spouse.
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Inhibition of Acetohydroxyacid Synthase by Sulfonylureas and Imidazolinones
Tae Woo Ahan,Dae Whang Kim,Jung Do Choi 생화학분자생물학회 1992 BMB Reports Vol.25 No.7
Acetohydroxyacid synthase (AHAS) is the first common enzyme in the biosynthetic pathways for valine, leucine, and isoleucine. AHAS is the target site for four classes of structually unrelated herbicides, the sulfonylurea, imidazolinone, triazolopyrimidin, and pyri-midyl-oxy-benzoate chemical families. AHAS has been partially purified from dark-grown pea shoots approximately 2,000 fold. We have synthesized new sulfonylurea and imidazolinone herbicides, and examined their biological activities using the pea enzyme. I_(50) values for inhi-bition of AHAS by sulfonylureas and imidazolinones tested ranged from 3 to 50 nM and from 67 to about 500 nM, respectively. Sulfonylurea chlorosulfuron and imidazolinone Cadre were shown to be competitive and mixed-type inhibitor with respect to pyruvate, respectively. The inhibitions of AHAS by both sulfonylurea and imidazolinone were time-dependent and biphasic.
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Is Accounting Information Quality Priced in Korea?
Ok-Hwa Ahan,Juwan Kim,Dongcheol Kim 한국재무학회 2008 한국재무학회 학술대회 Vol.2008 No.05
There has been a debate as to whether accounting information quality priced on asset returns and systematically affects the cost of capital of firms in the world market. In this paper, we examine whether there is a relationship between accounting information quality proxied by accruals quality in the Korean markets, and whether it does affect the cost of capital. Although accruals quality is linked with some variables representing the uncertainty of future cash flows and thus it could be a good proxy for a risk, we find no evidence, unlike in the U.S, that this risk is systematically priced in stock returns and it does affect the cost of capital in Korea. Specifically, after controlling for the factors affecting the cost of debt and the cost of equity, we find that the proxy variable for accounting information quality has no significant relation with the cost of debt and the cost of equity. In particular, there is a flat relation between average stock returns and accruals quality. We also provide another perspective in examining whether accounting information quality affects the cost of equity capital. If accounting information quality affects the cost of equity, as accounting information quality becomes poorer, investors would require a greater risk premium associated with the well-know risk factor such as firm size, book-to-market, and price momentum. However, we find no evidence supporting this.
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