• Journal of the Korean Statistical Society
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• 제11권2호
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• pp.131-138
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• 1982

Analogous to Singh's (1978) characterization of positive-Poisson distributioin and Shanmugam and Singh's (1992) characterization of logarithmic series distribution, a characterization and its statistical application of the negative binomial distribution truncated at zero are given in this paper. While it is known that under certain conditions the negative binomial distribution truncted at zero approaches the positive-Poisson and the logarithmic series distributions, we show here that the results of this paper approach in limit the results of Singh, and Shanmugam and Singh, respectively. Using the biologicla data from Sampford (1955), we illusrate our results. Also, expressions are explicitly given to test the hypothesis whether a random sample is indeed from a geometric distribution.

• 한국지능시스템학회논문지
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• 제6권2호
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• pp.111-119
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• 1996

In this paper, we propose time-optimal trajectory planning algorithms for cooperative multi-robot manipulators system considering optimal load distribution. Internal forces essentially effect on time optimal trajectory planning and if they are comitted, the time optimal scheme is not no longer true. Therefore, we try to find the internal force factors of cooperative robot manipulators system in a time-optimal aspect. In this approach, a specific generalized inverse is used and is fuzzified for the purpose. In this optimal method, the fuzzy logic concept is used and selected for diminishing computation time, for finding the load distribution factors.

• 한국수자원학회논문집
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• 제34권6호
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• pp.725-733
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• 2001

본 연구에서는 모형배수지를 이용하여 유출량의 변동여부와 도류벽의 설치여부에 따른 유출수의 잔류염소농도의 변화를 추적하였다. 모형배수지의 실험결과를 고찰해 보면, 유출량을 변동시킨 경우에 있어서 도류벽이 없을 때와 도류벽이 2개 있을 때, 유출수의 평균 잔류염소농도의 차이가 유출량을 일정하게 유지한 경우에 비하여 줄어 들었다. 이는 유출량 변동의 영향에 의한 것으로 유출량의 변동이 심한 배수지에 있어서는 유출량의 변동이 심하지 않은 정수지에서 보다는 도류벽 설치의 효과가 작은 것으로 판단된다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2005년도 총회 및 춘계학술발표회
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• pp.284-287
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• 2005

The flow of groundwater in fractured medium is related to the geometric characteristics of the fracture system. And a fracture aperture and a fracture density are considered as important factor concerning the permeability. Data acquisition of the properties of fracture such as aperture and density is so difficult and has uncertainty. We also cannot know the fracture characteristics through the in-situ tests. We usually obtain the fracture information from a ultrasonic scan logging or borehole television indirectly. Using the deduced results, we can make the fracture system and simulate the groundwater flow and solute transport in the crystalline rock. This study aimed to analyze the correlation between the properties of fracture and hydraulic conductivities obtained at the same interval. The properties of fracture are examined by acoustic televiwer and hydraulic conductivities are obtained by constant Pressure injection test. The distributioin of fracture width and fracture frequency shows the log-normal probability plot. And, Results of correlation analysis explain that opened type fractures have proper relation with hydraulic conductivity. But, as though there are semi-opened type fractures or closed type fractures, those have the permeable structure.

• Journal of Nutrition and Health
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• 제27권8호
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• pp.828-836
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• 1994

A low level exposure experiment was conducted on growing rats to investigate the accumulation and organ distribution of protein bound cadmium compared with cadmium chloride. Male Sprague-Dawley rats were fed for 21days with one of the semisynthetic diets, which contains cadmium as either bovine liver- or kidney meal bound cadmium, cadmium chloride with uncontaminated liver meal or cadmium chloride without organ meal, in the levels of ca. 0.5, 1 and 1.5mg/kg diet, respectively. After 21days of exposure cadmium was accumulated in liver, kidney and gastrointestinal tracts depending upon cadmium levels in diet. Inspite of very low cadmium accumulation in whole blood, it tends also to increase with dietary cadmium levels. The blood cadmium concentration of animals fed organ meal containing diets was about 4-7 fold higher than that without organ meal, regardless of cadmium was intrinsically bound to protein or not. However, significant effects of organ protein on cadmium accumulation in liver, kidney and digestive tracts were not detectable, when cadmium was supplemented as cadmium chloride. On the other hands, animals fed diet containing ca. 1.5mg Cd/kg as organ bound cadmium retained more cadmium in liver, kidney and digestive tracts compared to cadmium chloride with organ meal, whereby the increase of cadmium concentration in kidney was greater then in liver. However, when the concentration of protein bound cadmium was<1mg/kg diet, organ bound cadmium was not significantly different from cadmium chloride in bioavailability and organ distribution. From this result it is suggested that the intestinal absorption of protein bound cadmium is influenced of the amount of cadmium bound in protein. When cadmium concentration in protein is relatively low, protein bound cadmium seems to be absorbed in the same way as cadmium ions are absorbed. However, when the concentration is high, at least a small amount of intact protein bound cadmium could be absorbed and accumulated selectively in kidney.

• 농업과학연구
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• 제22권2호
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• pp.170-179
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• 1995

본 연구는 축협중앙회 한우개량사업소에서 사육하고 있는 한우 238두의 혈청내에 존재하는 혈액 단백질 및 효소의 유전적 다형을 조사하기 위하여, 혈청단백질인 post-transferrin-2(pTf-2), transferrin(Tf), post-albumin(pAlb) 및 albumin(Alb)과 혈청 효소인 ceruloplasmin(Cp) 및 amylase-I(Am-I), 그리고 혈구단백질인 hemoglobin(Hb)을 PAGE(polyacrylamide gel electrophoresis)와 STAGE(starch gel electrophoresis) 방법으로 유전적 다형을 분석하여 이들의 유전자형 및 유전자빈도를 추정하였던바 그 결과는 다음과 같다. 1. 혈청단백질인 pTf-2 좌위는 pTf-2 F와 S의 공우성 대립유전자가 검출되었고, 유전자형은 pTf-2 FF, FS 및 SS 형이 확인되었으며, 이들의 분포는 각각 46.22, 46.64 및 7.14%이었고, 유전자 빈도는 pTf-2 F와 S에서 각각 0.695 및 0.305이었다. 2. Tf 좌위는 Tf A, D1, D2 및 E의 대립유전자가 검출되었으며, 유전자형에 있어서는 Tf AA, ADl, AD2, AE, D1D1, D1D2, D2D2 DIE D2E 및 EE형이 확인되었고, 이들의 분포는 각각 0.84, 13.87, 13.03, 10.92, 22.27, 12.61, 2.94, 15.l3, 6.72 및 1.68%이었으며, 유전자빈도에 있어서는 Tf A, D1, D2 및 E의 빈도가 각각 0.197, 0.430, 0.191 및 0.181이었다. 3. pAlb 좌위는 pAlb F와 S 유전자가 검출되었으며, 유전자형의 분포에 있어서는 pAlb FFFS 및 SS 형이 각각 42.86, 33.19 및 23.95%이었고, 유전자빈도에 있어서는 pAlb F와 S에서 각각 0.595 및 0.405이었으며, Alb에서는 Alb A 유전자 빈도가 1.000이었다. 4. Cp 좌위는 Cp F와 S 유전자가 확인되었으며, 유전자형의 분포는 Cp FF, FS 및 SS 형에서 각각 23.11, 34.87 및 42.02% 이었고, Cp F와 S 유전자빈도는 각각 0.405 및 0.595이었다. 5. Am-I 좌위는 Am-I B와 C 대립유전자가 검출되었으며, 유전자형의 분포는 Am-I BB, BC 및 CC형에서 각각 51.26, 16.81 및 31.93%이었고, 유전자빈도는 Am-I B와 C가 각각 0.597 및 0.403이었다. 6. Hb 좌위는 Hb A와 B 대립유전자가 검출되었으며, 유전자형의 분포는 Hb AA, AB 및 BB형에서 각각 83.19, 16.39 및 0.42%이었고, Hb A와 B의 유전자빈도는 각각 0.914 및 0.086%이었다.