現代科學속의 Newton 力學 : 科學的 方法의 限界性

全炳基 대구효성가톨릭대학교 자연과학연구소 1994 基礎科學硏究論集 Vol.1994 No.1

溫度와 食餌가 소금쟁이(Gerris paludum insularis)의 發育에 미치는 影響 : Hemiptera, Gerridae

朴商玉,黃鎭慶,朱恩榮 대구효성가톨릭대학교 자연과학연구소 1991 基礎科學硏究論集 Vol.1991 No.1

사과배지와 인공배지에서 배양된 초파리를 각각 식이로 제공하여 소금쟁이(Gerris paludum insularis)를 광주기 16L:8D, 광도 510土240 lux, 상대습도 65±3%의 동일한 조건으로 조절되는 25℃, 30℃의 항온과 자연상태의 변온조건에서 사육하여 그 발육을 분석한 결과 다음과 같은 결론을 얻었다. 1. 사과배지에서 사육한 초파리를 먹이로 한 유충의 총발육기간은 자연상태가 가장 긴 40일이었으며, 25℃ 35일, 30℃ 27일이었다. 인공배지에서 사육한 초파리를 먹이로 한 유충의 총 발육기간은 25℃에서는 42일로 가장 길었으며, 자연상태에서는 32일, 30℃에서는 27일의 순으로 나타났다. 2. 각 발육한계 중 5령이 가장 발육기간이 길었으며, 식이의 영향을 받지 않는 난기는 25℃에서 가장 길었다. 3. 인공배지에서 사육한 초파리를 먹이로 한 유충은 25℃에서는 정상적인 발육이 어려웠다. 4. 30℃에서는 식이에 따른 발육기간의 차는 나타나지 않았으나 25℃와 자연상태에서는 식이에 따라 발육기간에 차가 생겼다. 5. 성체출현율은 사과배지의 것이 인공배지의 것보다 높았다. 6. 생존곡선은 ??형이었다. 7. 소금쟁이의 발육은 식이와 온도에 크게 의존하였다. The water striders, Gerris paludum insularis larvae which were fed with the Drosophila melanogaster cultured on the apple diet and the artificial diet, were reared in the growth cabinet controlled as the two constant temperture regimes of 25℃ and 30℃ under the condition of photoperiod 16L:8D, light intensity 510±240 lux, relative humidity 65±3%, and in the natural state. The effects of temperature and diet on the development of G. paludum insularis were analyzed and the results were summarized as follows. 1. The total developmental period of the water strider larvae fed with the D. melanogaster reared on the apple diet at the natural state was the longest 40 days, and the total developmental periods at 25℃ and 30℃ were 35 days and 27 days respectively. The total developmental period of larvae fed with D. melanogaster reared on the artificial diet at 25℃ was the longest 42 days, and the total developmental periods at natural state and 30℃ were 32 days and 27 days, respectively. 2. In the larval developmental stages, the fifth stage was longer than that of any stages. The duration of egg stage which was not influenced by diet at 25℃ was the longest. 3. The water strider larvae fed with the D. melanogaster reared on the artificial diet at 25℃ did not complete their development. 4. No significant difference was observed in the developmental period for diet at 30℃. But, there were significant differences in developmental periods for diet at 25℃ and natural state. 5. The rate of adult emergence on the apple diet was higher than that of the artificial diet. 6. The shapes of the survivorship curve were convex-curve. 7. The developmental periods of the larval stages of water striders might be affected to temperature and diet dependently.

A LAW OF THE ITERATED LOGARITHM FOR DOUBLE ARRAYS OF RANDOM VARIABLES

HONG, D. H.,HWANG, S. Y. 대구효성가톨릭대학교 자연과학연구소 1993 基礎科學硏究論集 Vol.1993 No.1

In this paper, the Hartman-Winter law of the iterated logarithm is generalized to double sequences of independent identically distributed random variables, thus, extended to finite dimensional arrays.

ON THE CLT FOR THE SUMS OF A RANDOM NUMBER OF PAIRWISE I.I.D RANDOM VARIABLES

HONG, D. H. 대구효성가톨릭대학교 자연과학연구소 1993 基礎科學硏究論集 Vol.1993 No.1

Let X_1, X_2, … be a sequence of random variables on a probability space(Ω, F, P) and let v_1, v_2, … ba a sequence of positive integer valued random variables. Set Sn = X_1 + X_2 +… and

On the Weak Law of Large Numbers for the Sums of Sign-Invariant Random Variables

Hong, Dug Hun 대구효성가톨릭대학교 자연과학연구소 1993 基礎科學硏究論集 Vol.1993 No.1

We consider various types of weak convergence for sums of sign-invariant random variables. Some results show a similarity between independence and sign-invariance. As a special case, we obtain a result which strengthens a weak law proved by Rosalsky and Teicher [6] in that some assumptions are deleted.

LAWS OF LARGE NUMBERS FOR PRODUCTS OF SOME MEASURES AND PARTIAL SUM PROCESSES INDEXED BY SETS

HONG, DUG HUN,KWON, JOONG SUNG 대구효성가톨릭대학교 자연과학연구소 1993 基礎科學硏究論集 Vol.1993 No.1

새로운 1,2,4-Triazole 유도체의 합성에 관한 연구

金浩植,朴胎晝,都理香,李萬佶,倉澤嘉久 대구효성가톨릭대학교 자연과학연구소 1992 基礎科學硏究論集 Vol.1992 No.1

o-페닐렌디아민(3)을 출발물질로 하여 4단계를 거쳐 α-arylhydrazonoacylazide(7)를 합성하였다. 얻어진 α-arylhydrazonoacylazide(7) 디메틸슬폭시드 용액에서 hydrazone imine형과 diazenyl enamine 형으로 존재하는데 이들 사이의 토오토메리 현상을 ^1H-NMR 스펙트럼 데이터에 의하여 측정된 토오토머비로서 고찰하였다. α-Arylhydrazonoacylazide(7)를 벤젠용매에서 환류시켜 1-aryl-3-quinoxalinyl-1,2,4-triazole(8)을 합성하였다. α-Arylhydrazonoacylazide(7) was synthesized starting from o-phenylenediamine(3) in four steps. The tautomeric behavior of α-arylhydrazonoacylazide(7) between the hydrazone imine and diazenyl enamine forms in the dimethyl sulfoxide solution was investigated on the basis of the tautomer raio determined by the ^1H-NMR spectral data. The 1-aryl-3-quinoxalinyl-1,2,4-triazol(8) was synthesized from α-arylhydrazonoacylazide(7) by refluxing in benzene.

EXACT SEQUENCES FOR SUMS OF PAIRWISE I.I.D RANDOM VARIABLES

HONG, DUG HUN,PARK, JIN MYUNG 대구효성가톨릭대학교 자연과학연구소 1993 基礎科學硏究論集 Vol.1993 No.1

AN LIL FOR RANDOM WALKS WITH TIME STATIONARY RANDOM DISTRIBUTION FUNCTION

HONG, DUG HUN,KWON, JOONG SUNG 대구효성가톨릭대학교 자연과학연구소 1993 基礎科學硏究論集 Vol.1993 No.1

Let F be a family of distribution functions and let γ be a stationary ergodic probability measure on F_1^∞ = ∏_i=1^∞F of copies of F. Now for each ω=(F_1^ω,F_2^ω,…)∈F_1^∞, we define a probability measure P_ω on (R_1^∞,B_1^∞) so that P_ω= ∏_i=1^∞F_i^ω, Let X_n:R_1^∞→R be the coordinate functions X_n(x)=x_n, x=(x_n). In this paper we study LIL for partial sums of {X_n} with respect to P_ω and as a special case of above model we also study LIL for interchangeable process.

비정질 Ge_20S_65Bi_15 박막의 n형 전도기구에 관한 연구

장현범,이병로,김태만,이광배,김화민 대구효성가톨릭대학교 자연과학연구소 1992 基礎科學硏究論集 Vol.1992 No.1

비정질 Ge_20S_(80-χ)Bi_χ(χ=0, 4, 8, 12, 15 at%) 박막에 대한 전기전도도, 열기전력, 광흡수계수의 측정으로부터 pn-전이에 관한 기구를 조사하였다. 비정질 Ge_20S_(80-χ)Bi_χ 벌크시료의 경우 χ=12 at% 이상에서 n-형 전도가 일어나는데 비하여 박막사료의 경우는 χ=15 at%에서만 n-형 전도가 발견되었다. 이는 박막시료가 벌크시료에 비하여 더 많은 국소적 무질서와 갭안의 상태에 의한 것으로 설명된다. 비정질 Ge_20S_(80-χ)Bi_χ 박막에서 직류전기전도에 대한 활성화에너지와 열기전력에 대한 활성화에너지의 차이는 0.2에서 0.3eV 정도이며, 광학적갭이 χ=4 이상에서는 조금씩 감소하는 반면 직류 전기전도에 대한 활성화에너지는 χ=12에서 15 사이에서 급격한 감소를 나타낸다. 이는 n-형 전도는 전도대 미부의 국재화 상태들 사이의 호핑전도와 전도대쪽으로의 Fermi 준위의 이동을 수반하는 것으로 이해된다. The mechanism of pn-transition in amorphous Ge_20S_(80-χ)Bi_χ(χ=0, 4, 8, 12, 15 at%) films was investigated from the measurement of dc conductivity, thermoelectric power and optical absorption coefficient. N-type conduction was found only at χ=15 for film samples, as compared at χ≥12 for bulk glasses. The larger Bi contents for n-type conduction in deposited films than in glasses are to be due to the larger topological disorder and density of defect states in the gap. The difference between the activation energy for dc conduction and that for thermoelectric power is about 0.2 to 0.3 eV and the optical gaps were slightly decreased with the incorporation of more than 4 at%, in contrast to the remarkable decrease in the activation energy for conduction between χ=12 and 15 in a-Ge_20S_(80-χ)Bi_χ film. These are interpreted that n-type conduction is accompanied to both the hopping conduction in the localized states to the tail of the conduction band and the shift of the Fermi level toward the conduction band.