경화콘크리트 내부의 기포분포상태 분석에 관한 연구

김기철,정재동,최영화 大邱大學校 科學技術硏究所 1998 科學技術硏究 Vol.5 No.3

Air voids existed in hardened concrete have an important influence on concrete deterioration such as carbonation, freezing and thawing, and corrosion of embedded steel in concrete. Therefore it is very significant to investigate the pore structure of system(size, number and continuity of air voids) to solve the reason caused concrete deterioration. The purpose of this study is to develop the standard method of measuring air voids which affect properties in hardened concrete using image analyzing system. This paper presents the settlement of rapid and exact experimental method which extracts fine bubbles, calculates the number of air voids, and determines air-void distribution using image analyzing system with computer.

콘크리트의 强度發現性狀에 관한 實驗的 硏究 : 溫水養生에 의한 强度發現性狀

金鍾寅,崔榮和,鄭載東,張炳一 대구대학교 과학기술연구소 1996 科學技術硏究 Vol.3 No.1

The purpose of this experimental study is to evaluate the strength development of concrete by warm water method and discuss how these methods can be adapted for regular quality control and quality assurance of concrete. Accelerate strength test data by warrn water method can be used for estimating the future strength, e.g. the 28-day strength. This study process has conducted to estimating strength development of mortar and concrete, and early estimating strength of concrete according to W/C = 50, 55, 60%, curing temperature = 20, 40, 60℃ For these Ultrasonic Velocity test on concrete are performed for the concrete prepared with 40℃ . The results of this study., the equations applicable universally with resonable accuracy, are presented for estimating the potential strength of concrete by warm water-curing method.

청소년의 여가활동유형과 경험수준 및 사회적 적응의 관계

김홍백,남재화 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.20 No.1

This paper explores the relationship between types of leisure activity and level of leisure experience, social adjustment among youth. From questionnaire data on convenience sample of students(N=322). who attend high school located in Seoul by the method of cluster random sampling. The finding from the reduced analysis of covariance, post-hoc test and multiple regression analysis suggest that the correlates of the relative relationship between types of leisure activity and level of leisure experience, social adjustment among youth. Results indicated that the meaning significant found the relationship between types of leisure activity and level of leisure experience, social adjustment and among youth. For level of leisure experience are partially different by the types of leisure activity among youth. For the social adjustment are partially different by the types of leisure activity among youth. For the level of leisure experience is partially influence on social adjustment among youth.

콘크리트의 應力-變形關係에 關한 實驗的 硏究 : 鋼纖維 콘크리트에 關하여 About steel fiber concrete

金和中,權寧煥,李尙宰,全明熏 경북대학교 산업기술연구소 1990 産業技術硏究誌 Vol.18 No.-

The factors adopted in this experiment are volume fraction and the diameter and aspect ratio of fiber. The levels of factors are determined by existing studies. The effects of the diameter and mixing volume fraction and the aspect ratio for maximum strength, strain and tangent modulus are analyxed based on the linear multiple regression and we obtained regression equations as follows ; Maximum stress : σ_max=298.59820+95.78361φ-6.36043V_f+0.62067Ar Maximum strain at maximum stress : ε_max=0.021336+0.15746φ+0.05519V_f+0.00181Ar Tangent modulus : E=208209.80+87132.84φ-17286.69V_f-464.9181Ar where φ : diameter V_f : volume fraction Ar : Aspect Ratio

형식 규격어을 이용한 보안표준의 기술과 Strict Conformance Testing에 관한 연구

김기수,김영화,류재철 충남대학교 기초과학연구소 1995 忠南科學硏究誌 Vol.22 No.1

This paper represents the importance of using Formal Specification Language(FSL) in the security relevant standards and introduces the VDM-SL toolbox which is one of FSL tools. Also, Strict Conformance Testing(SCT) methodology is introduced to test the implementations of security standards. Finally, we show the necessity of FSL in testing of security standards.

암 병동 간호사의 통증관리에 대한 지식과 태도

공성화,방찌야,서민숙,현신숙,김희정,이미애1,이미애2,유현희,허재경,김은애,박경숙 성인간호학회 2004 성인간호학회지 Vol.16 No.1

Purpose: The purpose of this study is to evaluate the knowledge and attitudes of oncology ward nurses toward cancer pain management and to find ways to improve the educational program for nurses. Method: A total of 209 nurses working at the oncology ward of three hospitals in Seoul and a Gyenggi Province. The survey instrument used was the 32-item scale for evaluating nurses knowledge and attitudes originally developed by McCaffery and Ferrell'(1990). that was by Kim'(1997). Result: In terms of the nurses knowledge of pain management. the result showed that the nurses scored an average of 67.8 out of 100 for phamacokinetics of opioids. 84.8 for classification of analgesics, 60.1 for pain assessment, and 70.7 for drug administration. 18.2% of the nurses hesitate to inject the narcotic agent because of concerns regarding the drug's potential side effects. there was significant difference in the knowledge of pain management according to the general characteristics of pain in terms of the nurses age(p=.001), position (p=.016). years of experiences(p=.002), experience of cancer pain education(p= .001). Conclusion: The also showed that nurses working at cancer ward lack knowledge. It is important to provide intensive education to nurses about cancer pain management.

재생잔골재의 부착모르타르량 측정에 관한 실험적 연구

정재동,조현대,김한철,최영화 대구대학교 산업기술연구소 2004 産業技術硏究 Vol.16 No.1

This study bases on showing the pictures of how to keep a recycled fine aggregate well (quality control) and how to invent the measurement of mortar's quantities which largely effect on basic properties of matter: strength, durability and so on. As a result of the experiment by immersion, quantities of adhesive cement takes 7 to 8 days to stabilize by sulfuric. However, by hydrochloric acid, it takes a little quicker due to the first quick reaction, aggregate of the measurement of adhesive mortar by immersion used acid liquids are likely applicable following a suitable inspection and complementarity.

Isoproterenol이 마우스 심근조직에 미치는 영향

최재화,김호덕,심태섭,라봉진 중앙대학교 의과대학 의과학연구소 1985 中央醫大誌 Vol.10 No.1

For the study, forty-six normal adult ICR mice were sacrificed. Extraction of the hearts was performed under ether anesthesia after two consecutive subcutaneous injections of isoproterenol hydrochloride (1-/3', 4'-dihydroxyphenyl/-2-isopropylaminoethanol HCI). The administered doses of isoproterenol to each group of the mice were 20mg, 35mg, 50mg, 80mg, 100mg, 150mg, and 200mg per kilogram of body weight respectively, After extraction, the wet weight of each of the hearts was measured. Five μm-thick paraffin sections of the heart tissue fixed with alcohol-formalin were stained with hematoxylin and eosin for routine study, with van Gieson's method for collagen, and with von Kossa's method for histochemical study of calcium salt. Stained sections were examined under light microscope. The results were as follows: 1. All of the mice treated with isoproterenol showed myocardial necrosis-like lesions. These lesions spread from subendocardial area to entire myocardium in accordance with the increase of dose of isoproterenol and the prevalence rate of myocardial necrosis by isoproterenol administration was higher in the left ventricle than in the right ventricle. 2. The most typical histopathologic findings of myocardial necrosis were observed in the mice treated with 80mg of isoproterenol per kilogram of body weight. 3. The mice treated with 100mg, 150mg, and 200mg of isoproterenol per kilogram of body weight showed the death rate of 50%, 83%, and 100% respectively after the first administration. 4. All of the mice treated with isoproterenol showed calcium deposits in the myocardium. 5. The ratio of the wet weight of heart to the body weight increased in the mice treated with isoproterenol in comparison with the control mice.

人蔘添食이 누에의 成育 및 몇가지 代謝에 미치는 影響

李載窪,金永 全南大學校 農漁村開發硏究所 1986 農業科學技術硏究 Vol.21 No.-

Effect of Coating mulberry leaves with ginseng solution on the weight of larva and cocoon, the cocoon layer ratio, the activities of GOT and GPT that are known to be important in amino acid metabolism. the activity of amylase. and the contents of cholesterol, triglyceride and sugar was investigated. The results are summerized as follows 1. Ginseng solution coated mulberry leaves were more effective in increasing the weight of larva and cocoon layer, and the cocoon Layer Ratio than non-coated leaves. 2. The activities of GOT and GPT in silkworms feeded with ginseng solution coated mulberry leaves decreased, and were inversely related with the concentration of ginseng. 3. The activity of amylase in silkworms feeded with ginseng solution coated mulberry leaves decreased, and was inversely related with the concentration of ginseng. 4. The contents of total cholesterol and triglyceride in silkworms feeded with ginseng solution coated mulberry leaves decreased. 5. The content of sugar in silkworms feeded with ginseng solution coated mulberry leaves decreased and appeared not to be inf1uenced by the concentration of ginseng.

아산시 5대 저수지의 오염부하량 산정을 통한 수질오염 요인분석

장봉기;김민중;최재호;이종화 순천향대학교 기초과학연구소 2010 순천향자연과학연구 논문집 Vol.16 No.2

Five great reservoirs located in Asan city (Gungpyeong, Gahye, Togo, Masan, Bongjae) for each of the inflow of water pollutants (biochernical oxygen demand (BOD), suspended solids (SS), total nitrogen (T-P), total phosphorus (T- P) in units of pollutant loads were calculated by estimating. The results were as follows; The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 58.7%, 85.4%, 59.1% and 91.2%, respectively of total water pollution load in the reservoir Gungpyeong. The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 96.1%, 97.6%, 96.2% and203rmb 99.5%, respectively of total water pollution load in the reservoir Gahye. The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 93.8%, 96.9%, 91.7% and 98.7%, respectively of tot~l water pollution load in the reservoir Togo. The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 39.3%, 71.6%, 52.2% and 76.2%, respectively of total water pollution load in the reservoir Masan The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 96.3%, 98.5%, 96.2% and 99.5%, respectively of total water pollution load in the reservoir Bongjae. Total amounts of each water pollutants was highest in the basin of reservoir Bongjae and the next Gahye, Togo, Masan. Reservoir Gungpyeong was lowest in five reservoirs located in Asan Clty. These results suggest that contamination of the reservoir inflow in Asan city, water pollution management for the reservoirs will be focusing on the livestock wastewater.