다짐粘土와 자연粘土의 透水係數 豫測

김용희,류제천,김송만,박춘수 忠南大學校 産業技術硏究所 2001 산업기술연구논문집 Vol.16 No.2

The permeability means a factor to affect the movement of fluid under the gravity or the body force. the number of engineering problems, as seepage problem, calculation of settlement velocity, and slope stability, is related with the coefficient of permeability of soils. Therefore, it is very important for geotechnical engineers to understand properties of coefficient of permeability. Hence, after his study adapted Kozeny-Carman's equation to variety factors which affected the permeability of clay soils. an appropriate factor could be selected. The study came to the conclusion that the most related factor between specific surface and permeability appears to be mass of #200 passing percentage in the case of compacted clay and clay content for natural clay. For that reason, the permeability of natural clay is affected by the electric-chemical property but the compacted clay appears to be affected by the change of clay fabric, because the compaction change flocculated structure into dispersed structure to destroy the fabric of clay particle. New equation was developed to applied #200 passing percentage and clay content to Kozeny-Carman equation. The coefficient of permeability of developed equation appeared that was contented in the limit of confidence level for the measured coefficient of permeability. The developed equation can use for estimating values in the coefficient of permeability of compacted clay and natural clay. In the future one will need many studies for getting more accurate coefficient of permeability

굴착 주변의 지반침하 예측

김교신,류제천,김송만,박춘수 충남대학교 산업기술연구소 2000 산업기술연구논문집 Vol.15 No.2

Ground settlement and displacements of support structures due to deep excavation in urban area affect the stability of adjacent structures and retaining walls. Especially, the magnitude and distribution of ground settlements may directly give effects on the behavior of adjacent structures. So it comes to be important to judge precisely the effects on adjacent grounds and structures due to excavation. This can be achieved by means of ground settlements and differential settlements of structures, but present evaluating method on the ground settlement neglect the presence of adjacent structures. In this study, I have made Bowles and Bauer Method programs in order to find adjacent ground settlements. The results of program are like these. First, when you use measured horizontal displacement, the ratio of settlements of Bowles Method programs to Bauer is 0.86. Secondly, when you use measured horizontal displacement, settlements which Bowles Method program find is 5 times larger than settlements which Bauer Method program find when you use evaluated horizontal displacement.

초등학교 아동의 성취동기, 귀인 및 자기효능감이 운동수행에 미치는 영향

김인수,조경호,송춘현,박민선 광주교육대학교 초등교육연구소 2000 初等敎育硏究 Vol.15 No.1

The purpose of this study is to investigate the effect of the achievement motivation and self-efficacy on the performance of elementary school children. The subjects are 230 elementary school children(boy : 105, girl : 125) in K city. The independent variables of this study are achievement motivation and self-efficacy of subjects, and the dependent variables are golf putting. The results are as follows: 1.The level of achievement motivation is shown to have an effect on the performance of elementary school children: the subjects who have high achievement motivation show superior performance to those who have low score. 2.The level of self-efficacy is shown to have an effect on the performance of elementary school children: the subjects who have high self-efficacy show superior performance to those who have low score. 3.In the analysis of the change of post achievement motivation and self-efficacy due to success and failure, post achievement motivation is increased when subjects are confident to succeed it after performing, but reduced when subjects are afraid to fail their task. The post self-efficacy is increased when subjects think success to perform their task, but reduced when subjects think failure after their performance.

유산소 운동 능력의 차이가 점증최대운동부하 후 피로회복과정에 미치는 영향

송영주,권대근,성동진,황정윤,박천조,김춘우 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.20 No.1

This study was conducted to investigate the effects of aerobic capacity on blood lactate changes after supramaximal progressive loaded exercise. The subjects were divided into Handball players(HB, n=6)group and Control(CT, n=6)group. All subjects exercised according to the protocol by bicycle erogometer. Blood lactate concentration was also measured during the test time. The RER values of CT group were relatively higher than that of HB group. In particular, the RER values of HR group at exercise 8 & 12min were significantly lower than that of CT group(P<0.05). The blood lactate concentration of HB group was significantly lower than that of CT group at 12min during the exercise(P<0.05). During the recovery times the blood lactate concentration of HB group were significantly lower than that of CT group. In addition, blood lactate clearance of HB group was also higher than that of CT group during the recovery time. From these results, it was suggested that lactate clearance during the supramaximal exercise may be affected by the level of endurance exercise performance.

Multi Cone Nailing 工法의 地盤補强效果에 關한 硏究

김영삼,류제천,김송만,박춘수 忠南大學校 産業技術硏究所 2001 산업기술연구논문집 Vol.16 No.2

In this study, the behavior properties and the influences of design variables related to internal and external stability in soil Nailed structure are expounded. Also, the Multi Cone Nailing method, which is new soil Nailing method transformed by addition of multi Cone are introduced. This method was designed when the failure is occurred by separation of Nail and grout material. The Soil Nailing and Multi Cone Nailing by pullout test results and analyses using SLOPE/W software for the purpose of making researches into the ground reinforcing effect of Multi Cone Nailing method are compared and analyzed. In the analyses using SLOPE/W software, I intentionally determined the analyzed section which is ground strata consisting of fill and weathered soil and has 7.0m excavation height. Analyses divided by without reinforcement, reinforced by Soil Nailing and reinforced by Multi Cone Nailing respectively, and determined section and soil strata was not changed because of the purpose of studying the effect by only reinforcement differences. The results of this paper are summarized as follow. From the pullout test results, initial pullout capacity in Multi Cone Nailing increased in 15% than it in soil Nailing. And residual pullout capacity decreased in 62% than initial pullout capacity in soil Nailing, but it is the same in Multi cone Nailing. As result of analyses using SLOPE/W software, the vertical slope is failed condition when without reinforcement, but is safe when reinforced by soil Nailing or Multi Cone Nailing. The factor of safety in multi Cone Nailing increase in 20% than it in soil Nailing. Compared with in soil Nailing, strength and shear resistance following the slip surface enlarged in Multi Cone Nailing, but shear mobilized decreased in it.

동아(Benicasa hispida)첨가 식이가 비만을 유도한 흰쥐의 혈청성분에 미치는 영향

이승훈,김송전 명지대학교 자연과학연구소 1998 자연과학논문집 Vol.17 No.-

본 실험은 최근 생활수준의 향상과 이에 따른 식생활, 생활방식의 변화로 인해 심각한 사회문제로 대둑되고 있는 비만증과 여러 가지 합병증의 식이를 통한 개선과 치료를 목적으로, 한방 및 민간요법에서 비만방지 효과가 있다고 알려진 국내에서 생산되는 생약재, 특히 동아의 비만증 억제 기능성의 탐색을 하기 위해 행해졌다. Sprague-Dawley계 웅성 흰쥐에게 비만을 유발하기 위한 cafeteria diet를 급여하면서 17종의생약재의 열수추출물을 흰쥐 체중 100g당 0.4ml씩 각각의 군에 하루 2회씩 6주간 경구 투여한 후, 쥐의 체중증가량, 에너지섭취량 및 fat pad의 무게를 측정하였고, 간의 중성지질 함량, 혈당량 및 혈중 콜레스테롤 수치를 근거로 atherogenic index를 분석하였다. 그 중 가장 뛰어난 효과를 보인 동아의 수확시기별 비만억제 효과와 그 성분분석을 하여 다음과 같은 결론을 내렸다. 본 실험에 사용된 17종의 시료들의 배합으로 비만증 및 이와 관련된 여러 성인병의 예방과 치료에 도움이 될 수 있는 기능성 식품의 개발 가능성의 제시와 ,과거엔 상식해 왔으나 현재는 잊혀진 동아의 뛰어난 비만증억제 기능성의 재발견을 토대로 앞으로 동아의 건조,추출, 분획 및 절임 조건이 비만증 억제효과에 미치는 영향과 동아가 비만증을 억제 할 수 있는 것으로 생각된다. Obesity and it's various complication like diabetes melitus coronary heat disease, hepatitis, cholelithiasis, gout, nephritis were been serious social problem in these days. The purpose of this study was to investigate the anti-obesity function of wax gourd. The experiment using Sprague-Dawley male rats showed that seventeen kinds of food materials inhibited the increase of body weight gain, energy intake, fat pad weight, live triglyceride content, atherogenic index, and blood glucose concentration induced by cafeteria diet. Oral administration of wax gourd decreased the most body weight gain, energy intake, fat pad weight, and blood glucose concentration. Liver triglycerides content was the lowest in the group adiministered mulberry stem extract, and the group administered pine leaves showed the lowest atherogenic index. The combined administration of wax gourd, mulberry stern extract and pine leaves improved more the obesity and the related sympotms than the individual administrations. the above results show that the functional food for obesity and the related diseases of adult people can be developed by the conbination of the 17 food materials screened in this study.

어육장의 지방산과 아미노산의 함량에 관한 연구

조후종,김송전 명지대학교 자연과학연구소 1995 자연과학논문집 Vol.12 No.-

메주, 쇠고기, 해물 등을 혼합하여 규합총서의 방법으로 만들어진 된장과 간장을 어육장이라 한다. 어육장의구성분을 조사하기 위하여 어육장의 일반성분과 지방산, 그리고 아미노산를 분석하였다. 그 결과 어육장의 간장과 된장에는 곡류의 섭취로 인해 보족되기 쉬운 함황 아미노산과 lysine 이 많이 함유되 있었고, 필수지방산도 많았다. Soy sauce and soybean paste made by GUH HAP CHUNG SEU method with MEJU supplemented beef and fishes were called O YUK CHANG. To study constituents of O YUK CHANG, the author analysed general ingredient, ftty acids, and amino acids of O YUK CHANG that stored for one year. The results of O YUK CHANG analysis were summarized as follows. 1.The crude protein contents of soy sauce and soybean paste were 4.1% and 12.2%, and tye crude fat contents were 0.02%and 9.7%. 2. The calcium contents of soy sauce and soybean paste were 35.6mg and 109.1mg, iron 0.6mg and 2.3mg, posphorus 41.3mg and 101.4mg, kalium 298.2mg and 185.3mg, and magnesium 153.6mg and 90.5mg. 3. The contents of essential fatty acids, linoleic acid in soy sauce and soybean paste were 36.9% and 43.6%, and linolenic acid 6.7% and 7.9%. 4.The contents of essential amino acids, valine in soy sauce and soybean paste were 5.21% and 6.84%, methionine 2.53% and 3.33%, histidine 3.39% and 2.53%, cysteine 1.41% and 2.06%, isoleucine 4.54% and 5.46%, threonine 5.34% and 4.48%, leucine 6.28% and 8.86%, lysine 11.09% and 7.16%. According as this resutls, the O YUK CHANG contains plenty of essential fatty acids and amino acids, especially sulfur containing amino acid and lysine that are apt to lack owing to ingest much cereals. I think, therfore O YUK CHANG will contribute to elevate nutrition value and delicious flavor.

軟弱地盤 壓密特性과 沈下豫測

이재식,류제천,김송만,박춘수 충남대학교 산업기술연구소 2001 산업기술연구논문집 Vol.16 No.1

Recently, developed countries have brought about a considerable increase in the study of soft ground for the reasons of policy on farming protection, key industry and sightseeing development since the middle of the nineteenth century, particularly 1950s. In spite of the long and copious experience associated with these types of construction, the constructions of soft ground still have many delicate problems. In general, problems of soft ground related to stability are probably to meet settlements on the various circumstances. In order to accelerate the rate of consolidation settlement and gain a required shear strength for a given soft ground, the preloading technique combined with a vertical drainage system has been widely applied. In this paper, laboratory tests have analyzed to change the soil parameters that executed the plan of stage construction. The void ratio and water content of the clay decreases and the strength of soft ground rises during consolidation period. In order to predict of magnitude, rate of settlement and pore pressure dissipation under embankment of loading on drainage-installed soft ground, consolidation settlement prediction methods such as Asaoka method, curve fitting method, TAN method and Hyperbolic method applied to gain final consolidation settlement from the field settlement data. The Reliability analysis of consolidation settlement prediction methods made use of additional settlement data. Sequentially, it has been found that Hyperbolic method can appropriately predict the consolidation behavior of drainage-installed soft ground of Yangsan Mulgum.

有限要素法을 이용한 過壓密粘土의 壓密沈下豫測

현상락,류제천,김송만,박춘수 충남대학교 산업기술연구소 2002 산업기술연구논문집 Vol.17 No.1

Consolidation is the time-dependent settlement of soils resulting from the expulsion of water from the soil pores. When a saturated compressible clay layer is subjected to a stress increase, consolidation settlement occurs greatly. Because the hydraulic conductivity of clay is significantly small, the excess pore water pressure generated by loading gradually dissipates over a long period. The settlement caused by consolidation in clay may be several times greater than the immediate settlement. A number of researches are carried out to predict the consolidation behavior in field, however, most of researches show the discrepancies between the prediction and the field settlement data. Therefore, the estimation of consolidation rate is one of the important factors in the construcion on soft clayey deposits. In this paper, laboratory tests have analyzed to apply accurately the soil parameters that executed the plan of stage construction. This study analyzes consolidation behavior of overconsolidated clay with two-dimensional consolidation analysis program by use of the numerical method. By using this program, the time dependent consolidation behavior of soft deposits can be analyzed appropriately. Elastic and elastic-plastic finite element analysis are compared with Terzaghi's theory of one-dimensional consolidation.

N値에 따른 地盤評價에 關한 硏究

박은규,류제천,김송만,박춘수 忠南大學校 産業技術硏究所 2002 산업기술연구논문집 Vol.17 No.1

In this paper, parameters of soil which are estimated with N-value and the results from laboratory test with the sample in construntion field are compared and analyzed. As a result, modification methods caused by existed weight is nearly same with the Equation of Liao & Whitman. Under same existed weight, the difference of N'/N is 0.9~2.1 in the Equation of Peck & Bazzaraa and Gibbs & Holtz. The Equation of O-Ja-Ki (&?'§) is more accurate with average value than any other equations in estimating a angle of internal friction of sand. The result of laboratory test is similar to the Equation of terzaghi & Peck. When unconfined compression strength of clay is estimated, the equation, q_(u) ≒ N/0.722, may represent many suggested equations. Standard Penetration Test is one of the most popular method to estimate parameters of soil because of its simplicity. Correlation between N-value and parameters of soil has been studied by many people but the absurd is still remain and we can face it on the construction field. Therefore field investigation and understanding about N-value are required when engineers estimate parameters of soil with N-value. There should be more study to get high accuracy of N-value and trustable parameters of soil.