Application of cluster analysis for the hydrogeochemical factors of saline groundwater in Kimje, Korea

김지훈,Byoung-Woo Yum,김락현,고동찬,Tae-Jin Cheong,Jeongho Lee 한국지질과학협의회 2003 Geosciences Journal Vol.7 No.4

Park, Y.S., Kim, J.K. and Kim, J., 201, Petrochemistry of Granitoids322 Ji-Hoon Kim, Byoung-Wo Yum, Rak-Hyeon Kim, Dong-Chan Koh, Tae-Jin Cheong, Jeongho Lee and Ho-Wan Changin the Youngwang-Kimje area, Korea. Economic and Environ-mental Geology, 34, 55-70 (in Korean with English abstract).Price, B.N. and Calvert, S.E., 1977, The contrasting geochemicalbehaviors of iodine and bromine in resent sediments from theNambian Shelf. Geochimica et Cosmochimica Acta, 41, 1769-1775.Richter, B.C., Kreitler, C.W. and Bledsoe, B.E., 1993, Geochemicaltechniques of identifying sources for groundwater salinization.CRC Pres, New York, 285 p.Stumm, W. and Morgan, J.J., 196, Aquatic chemistry: chemicalequilibria and rates in natural waters. 3rd edn. Wiley, New York,1022 p.

쇼트피닝 가공한 평기어의 피로특성

정성균,정동건,박충식,김태형,이재헌 서울産業大學校 2002 논문집 Vol.53 No.1

In this paper, the effect of shot peening on the fatigue characteristics have been investigated. Two types of specimens were used to obtain the experimental results. One type of specimen was made by machining and heat-treating SCM415 steel. The other type of specimen was made by machining, heat-treating, and shot peening SCM415 steel. The hydraulic testing machine was used to do the fatigue test (R=0.1, 10Hz). The experimental results show that the fatigue life and strength of shot peened gear were largely improved compared with the unpeened gear.

일부지역 가임여성의 출산과 자녀 성선호에 관한 조사연구

정원영,심운택,이태용 충남대학교 의과대학 지역사회의학연구소 1988 충남의대잡지 Vol.15 No.2

This study was carried out for the evaluation of an attitude in regard to the fertility and the sex preference of children in 337 eligible woman living in city and county, from March 1986 to February 1987. The results were obtained as follows: 1. The first marriage age varied with the age and the level of education in eligible woman, and it was lowered when the age and the level of education were lower. 2. The marriage age had an influence on the mean number of children, and the number of children increased when the marriage was faster, 3. The necessity of son varied with the level of education, but not significant statistically. 4. In sex preference, if they would have only one child, the percentage of boy preference was over 60% of all. 5. The most frequent reason to have son was "succeed to one's family", and its percentage was over 40% of all. 6. The percentage of eligible woman with 2 children who satisfied was 91.0%, but about a half of eligible woman who had children over 3 answered "too many".

월악산을 중심으로 한 교육수준별 휴양자원의 이용자 실태

정대성, 민두식, 김병로 忠北大學校 1986 論文集 Vol.32 No.-

-본문참고-

중학교 가정교과와 다른교과의 교육내용 관련성 분석

정정희,이송자,유태명 한국 가정과 교육 학회 1998 한국가정과교육학회지 Vol.10 No.1

The purpose of this study is two-fold. One is to provide the teachers of Home Economics with the basic reference data ofthe relevance betwen Home Economics and other subjects taught in the middle schools for the purpose of bringing out more efficient classroom teaching. The other is to help the teachers, the textbook writers, and the curriculum reformers improve the curricula ofthe middle school on the basis of this research. The conclusions drawn from this study are as follows: 1) The units of Human development and Family Relationship should be teught with reference to Korean Language, Ethics, and Music. 2) The unit of Adolescence Development is dealt with in Physical Education and in Ethics as well, which seems to indicate that there was no interdisciplinary consideration and cooperation beefore/when the curricula were made. 3) The unit of Nutrition which appears in the first grade in Home Economics has a close second grade in Natural Science. It is thought that the interdisciplinary themes ought to be organized cooperatively among subjects for efficiency of study. 4) Since the unit of Clothing is not dealt with in the other subjects, it can be developed in Home Economics on its own. 5) As the unit of Housing is closely related to Teachnology, it should be taught on the basis of Technology. 6) The textbooks of all subjects should be written based on the interdisciplinary research and cooperation. They should be organized in order not to overlap or repeat the same topic in the same level if it is not necessary.

블라스트와 쇼트피닝이 Al 7075-T6의 피로특성에 미치는 효과에 관한 연구

정성균,조연희,김태형,이재헌 서울産業大學校 2002 논문집 Vol.53 No.1

In this paper, the effects of blasting and shot peening on the fatigue characteristics of Aluminium 7075-T6 alloy are studied. Three types of specimens, such as normal specimen, blasted specimen and shot peened specimen were used to get the experiment results. Rotary bending fatigue test machine was used to obtain the results, The experimental results show that the fatigue life and the fatigue strength were improved by shot peening, However, the fatigue life and the fatigue strength were increase a little bit by blasting.

荳科植物 樹葉의 化學的成分

鄭大成,閔斗植,李學州 충북대학교 농업과학기술연구소 1988 農業科學硏究 Vol.6 No.1

This study was Conducted to obtain some fundamental information on the chemical components of leguminous foliage comprising carbohydrates, lignin, extractives, composition of essential elements, pH and protein. Test materials used in this study were the foliage of seven leguminous species. (see, Table 1) Chemical analyses, of organic and inorganic components were performed by TAPPI standard and A.O.A.C. methods. 1.The extractive contents, carbohydrates and lignin of foliage are that the cold water extractives are from 17.7 to 25.37, hot water from 21.2 to 29.7%, 1% NaOH from 41.7 to 65.8%, alcohol : benzen from 6.4 to 12.4%, holocellulose contents from 37.1 to 57.7%, pentosan from 13.6 to 18.8% and lignin from 25.4 to 41.6%. 2.The essential elements of foliage are that the crude carbon contents are from 28.8 to 47.5%, N. from 1.05 to 2.79%, Ca. from 0.56 to 1.47%, Mg. from 0.22 to 0.37%, K. from 1.08 to 4.76%, P. from 0.18 to 0.38%, Cl. from 0.04 to 0.39%, Si. from 0.40 to 2.08% and ash from 4.92 to 8.17%. 3.pH values of the leguminous foliage from 5.19 to 6.82. And crude protein contents are from 10.6 to 18.8% of it.

경상도 전통 마른 명태 식해의 품질특성

최청,구태호,김성,최희진,성태수 한국식생활문화학회 2002 韓國食生活文化學會誌 Vol.17 No.3

The quality characteristics of traditional Kyungsangdo Myungtae (Alaska pollack) sikhae including optimal composition of the product were investigated. In the sensory evaluation, the Myungtae sikhae made from Gampo accepted to be best for traditional Kyungsangdo Myungtae sikhae and it is called standard sikhae. The standard sikhae was prepared as follows: dried-Myungtae 200g, cooked rice 230g, red pepper 92g, garlic 112g, ginger 100g, radish 1.6kg, salt 20g, and malt meal 65g. The Myungtae sikhae made from Gampo showed higher values in total sugar, free reducing sugar, and nitrogen compounds than the Myungtae sikhae made from another locations. The sugar of standard sikhae consisted of four kinds including glucose. And, the contents of free amino acid was increased in the order of glutamic acid, alanine, and methionine. The composition of free amino acid in Myungatae sikhae contained 17 kinds, and the contents was increased in order of glutamic acid, aspartic acid, and proline. The organic acid of standard Myungtae sikhae consisted of 7 kinds including lactic during fermentation. The contents of citric acid, succinic acid, and lactic acid gradually increased during fermentation, and especially, increasing of lactic acid remarkably increased than the different organic acid.

쇼트피닝 가공에 의한 Al 7075-T6의 피로특성에 관한 연구

김태형,정성균,신용승 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-

The shot peening process is most often used to improve fatigue properties of metal parts. In order to achieve optimum, repeatable and reliable fatigue enhancement from the shot peening process, the important shot peening parameters must be controlled. In this paper, the optimum shot peening condition is investigated. Rotate bending fatigue test was accomplished to investigate the effects of shot peening on the fatigue strength. Experimental results show that the fatigue strength was tremendously increased by optimum peening condition. But the fatigue strength was decreased by under peening or over peening.

마케팅 촉진을 위한 고객정보의 체계화 방안

이청림,이명호,김태호 한국경영과학회 2002 經營 科學 Vol.19 No.2

As the business structure of many industries changes under IT progress and internet economy, the customer information has emerged a key factor in setting up the management policy. The customer has come to replace the product as a central figure in business competition. The domestic life insurance market has also experienced the rapid structural changes in IT time. The competition in the insurance industry to maintain the existing membership and to attract the new members gets stronger under such a new business circumstance. Accordingly, it is necessary for an individual insurance company to develop a systematic marketing plan, based on the customer information, to be competitive in the market. Unlike other studies in which customer characteristics are neglected, this study attempts to utilize the customer information by applying the data mining technique, and then suggests an efficient marketing strategy that could prevail in the competitive business environment.