• 대한수학회논문집
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• 제13권3호
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• pp.595-601
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• 1998

In this paper we construct a homeomorphism on a Cantor set which is nearly periodic such that h(a) = b for given a, b $\in$ D$_{p}$. We also give an example which is not almost periodic and we discuss when a homeomorphism on a Cantor set is periodic.c.

• 대한수학회논문집
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• 제12권3호
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• pp.691-699
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• 1997

The following statement is known as the generalized Hilbert-Smith conjecture : If G is a compact group and acts effectively on a manifold, then G is a Lie group. In this paper we prove that the generalized Hilbert-Smith conjecture is equivalent to the following : A known, but has never been published before.

• 한국동물학회지
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• 제7권2호
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• pp.6-12
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• 1964

The present paper deals with the changes in serum protein fraction, total serum protein, hematocrit, red blood cell, haemoglobin, and weight of liver or kidney : body weight ratio of irradiated and non-irradiated snake head, Ophicephalus argus(CANTOR) . Irrardiation doses are 2537$\AA$-7 minutes (7M) and 2537$\AA$-15 minutes (15M). Serum electrophoretic patterns showed a marked decrease in albumin fraction at 1, 3, 9, 12 and 15 days on 7M group and 15 M group. On both experimental groups percentage increases in $\alpha$1 and $\beta$ fractions occurred at different time periods in general but are interpreted as only apparent changes accompanying the greater albumin fall. ${\gamma}$-Globulin decreased at 1, 6 and 15 days on 7M group. and at 1, 3, 6 and 9 days on 15M group. Also, A/G ratio was significantly low in groups subjected to above conditions as compared to the controls. A/G ratio decreased at 3 and 15 days remarkably on both groups. On the average, the reductions in the A/G ratio were not proportional to themagnitude of ultraviolet-light. Total protein of serum changed according to suggestive changes in electrophoretic patterns of serum . Total protein of serum declined at 1, 3, 6, 9 and 12 day periods on 7M groups and at 1, 3, 9, 12 and 15 day-periods on 15 M group, and increased approaching control values at 15 and 18 day-periods on both groups. Hematocrit increased remarkably at 1, 3, 6 and 12 days and decreased at 9 and 15 days on 7M group, and increased throughout the sampling period on 15M . Red blood cell decreased throughout the sampling period and increased slightly at 6 days on 7 M group and decreased at 1, 6, 9, 15 and 18 days and increased remarkably at 3 and 12 days on 15M group. Hemoglobin decreased remarkably at 1 day-period and increased at other days on both groups. The liver weight was not remarkably changed after whole body irradiation on both groups. and kidney was increased from 1st day on 7M group and 3 rd day on 15M group respectively. It appears that changes in electropphoretic patterns of serum, A/G ratio, total protein of serum, hematocrit, red blood cell, hemoglobin, and liver or kidney weight act to the detriment of the animal following non-ionizing irradiation.

• Steel and Composite Structures
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• 제1권3호
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• pp.329-340
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• 2001

Cyclic response of "shear" connections between steel outrigger beams and reinforced concrete core walls is presented in this paper. The connections investigated in this paper consisted of a shear tab welded onto a plate that was connected to the core walls through multiple headed studs. The experimental data from six specimens point to a capacity larger than the design value. However, the mode of failure was through pullout of the embedded plate, or fracture of the weld between the studs and plate. Such brittle modes of failure need to be avoided through proper design. A capacity design method based on dissipating the input energy through yielding and fracture of the shear tab was developed. This approach requires a good understanding of the expected capacity of headed studs under combined gravity shear and cyclic axial load (tension and compression). A model was developed and verified against test results from six specimens. A specimen designed based on the proposed design methodology performed very well, and the connection did not fail until shear tab fractured after extensive yielding. The proposed design method is recommended for design of outrigger beam-wall connections.

• 한국어류학회지
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• 제19권4호
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• pp.306-317
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• 2007

전라북도 곰소만에 위치한 선운리 조간대에서 채집된 2007년 4월부터 2007년 10월까지 말뚝망둥어 Periophthalmus modestus Cantor의 산란기를 파악하기 위하여 생식소 발달과 생식주기를 조사하였다. 난소는 수많은 난소소엽으로 이루어진 한 쌍의 낭상구조로 이루어져 있고, 정소는 1쌍의 엽상형 구조로 이루어져 있다. 말뚝망둥어의 생식소 발달과 성숙 및 배정은 지온증가와 장일장의 환경요인에 의해 조절되고 있다. 암컷과 수컷에서, 생식소중량지수(GSI)는 지온이 증가되기 시작하는 늦은 4월부터 증가되기 시작하였고, 6월 하순(고지온-장일장)인 하계에 최대에 도달하였다. 그리고 7월부터 8월까지 점차 감소되었다가 9월부터 증가하였다. 간중량지수 값(HSI)은 암수 모두 4월부터 점차 감소되었으며 암컷은 7월(성숙기)에 수컷은 6월에 최소에 이르렀다. 이후 8월(배정 및 회복기)부터 점차 증가되기 시작하였다. 암컷에서, GSI와 HSI 사이에는 역상관 관계를 나타내었다. 비만도지수는 4월(초기성장기)부터 점차 증가되기 시작하여, 6월(성숙기)에 최대에 도달한 다음 7~8월에 점진적으로 감소되었다. 산란기의 난경빈도 분포에 의해 말뚝망둥어는 산란기간 중 2회 또는 그 이상 산란하는 비동기발달형의 다회산란종으로서, 총 포란수는 체장에 비례하여 증가되었다. 군성숙도에 이르는 비율은 체장 5.1~5.5 cm인 암 수 개체들에서 각각 56.5%와 60.0% (평균 58.3 %)로 나타나, 이 계급 구간에서 생물학적인 최소 성숙 크기를 보여주었다. 이 종의 생식주기는 암컷의 경우 초기 성장기(4~5월), 후기 성장기(4~5월), 성숙기(5~6월), 완숙기 및 산란기(6~8월), 회복 및 휴지기(8~3월)의 5단계로 수컷의 경우는 성장기(4~5월), 성숙기(5~6월), 완숙 및 배정기(6~8월), 회복 및 휴지기(8~10월)의 4단계로 구분되었다. 암수의 성비를 조사한 결과 암 수의 성비는 1:1로 유의한 차를 보이지 않았다(${\chi}^2=0.65$, p>0.05).