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최기철 전북대학교 의과학연구소 1980 全北醫大論文集 Vol.4 No.1
Osteopetrosis is a rare disease of which the cause is unknown that shows osteosclerotic change on the entire skeletalsy stem. Clinically this disease is subdivided into benign and malignant groups. In malignant osteopetrosis, the patient dies during fetal life or postratal period. In benign osteopetrosis, patients do not show clinical symptoms and they are diagnosed by a radiologist accidentally. Author found a case of osteopetrosis during the reading of a routine chest P-A film. She was a 16 years old and her entire skeletal survey revealed generally increased bony density with a pathological fracture of the right humerus.
최기철,최신석,권오길,Choi, Ki Chul,Choi, Sin Sok,Kwon, O Kil The Korean Society for Integrative Biology 1968 동물학회지 Vol.11 No.1
1. Infectious glochidia are attached only on the young fish of Zacco platypus which ranged from 2 to 4 cm in total body length. 2. The attachment of the glochidia on the fish was found at the beginning of April. 3. The glochidia per infectious fish are shown to be 1.6 in average number. 4. the glochidia were dropped from the infectious fish completely from late April through early May. 5. Most glochidia released from mother shell are attached on the fins on infectious fish, and also on the eyes, nose, mouth and gill. 6. The largest number of the glochidia was attached on the caudal fins of infectious fish, and the next was pectoral fins. 1. Lamprotula coreana 가 棲息하는 現地에서는 體長 2-4cm 되는 피라미의 稚魚에서 만 本種의 幼生이 附着하고 있는 것을 觀察할 수 있었다. 2. 本種의 幼生의 魚體附着은 4月初에 이루어짐을 알았다. 3. 피라미의 個體當 幼生附着數는 1.6이었다. 4. 附着된 幼生은 4月末에서 5月初에 걸쳐서 完全히 脫落되었다. 5. 放出된 幼生은 大部分이 지느러미에 附着디며 少數는 눈, 코, 입, 아가미 等에도 附着한다는 事實을 밝혔다. 6. 幼生이 가장 많이 붙는 部位눈 魚體의 꼬리지느러미이었고 다음이 가슴지느러미이었다.
최기철,전상린,Choi, Ki Chul,Joen, Sang Rin The Korean Society for Integrative Biology 1968 동물학회지 Vol.11 No.1
(1) 1966年 5月 25日부터 1967年 8月 30日에 이르는 사이에 江原道高城郡懸內面松峴里에서 三陟郡近德面草堂窟에 이르는 嶺東地方에서 10箇 河川을 調査하여 40種의 淡水魚를 採集, 또는 確認하였다. 이 중, 32種은 이 地城에서는 未記錄種이다. (2) 이들 40種 중, 元山 以北에서 産出되지 않은 것이 14種이고, 漢江에서 棲息하지 않은 것이 17種이었고 蔚珍以南의 상도 慶尙道 東部에서 發見되지 않은 것이 11種 이다. (3) 嶺東地域에서 産出되지 않은 淡水魚로서 元山 以北에 棲息하는 것이 33種, 蔚珍 以南에서 發見되는 것이 16種, 漢江에서 採集되는 것이 60種이다. (4) 本區域은 淡水魚 分布上 Amur 亞區와 中國亞區의 中間型을 나타내고 있으며, 南北과 東西間의 差異는 各各 生態的 條件과 地域的 要因의 差異에 緣由하는 것으로 思料된다. (5) 本區域에서 産出되는 淡水魚 중, 分布上 特히 注目되는 것은 Ganthopogon strigatus, Cobitis rotundicaudata, Coreoperca kawamebari, Leucopsarion petersi 等이며, Gobiogobio, Pseudorasbora parva, Zacco paltypus, Zacco temmincki 等이 採集되지 못한 것은 意外이였다. 1. The authors have collected 40 species of fresh-water fishes at 10 streams located at east side area of Taebaik Mountain Chain, from Songhyon-ri, Hyonnae-myon, Kosung-Kun, Kangwon-do to Chodang cave, Koenduck-myon, Samchok-kun, Kangwon-do from May 25, 1966 to August 30, 1967. 2. Of 40 species 14 are not distributed in the Han River, another 17 are not found in northern part of Wonsan and 11 are not distributed in southern part of Woolchin located at east coast of Korea. 3. Thirty-three species of northern fresh-water fishes, 16 of southern species and 60 of the Han River species were not distributed in the studied area. 4. We consider that the studied area should be included intermediate district of Amur and China subregion. We also believe that the difference of the fish fauna of the studied area and northern part, southern part and the Han River is originated by ecological and geohistorical factors. 5. We consider that Ganthopogon strigatus, Cobitis rotundicaudata, Coreoperca kawamebari, Leucopsarion petersi are distributed in the studied area are remarkable facts. On the other hand, it was quite strange that Gobiogobio, Pseudorasbora parva, Zacco paltypus, Zacco temmincki are not found in the area.
최기철 부산 외국어 대학교 2001 外大論叢 Vol.23 No.1
The cluster size may be predetermined when we design the stratified two-stage cluster sampling. In this paper we study the optimal cluster size in stratified two-stage cluster sampling on the given costs. The optimal cluster size is decided by Cuh/C2h and intra-cluster correlation, as the results of our simulation are. Therefore, we can see that the bigger the intra-cluster correlation is the smaller the cluster size is. Also we find the optimal sampling and subsampling fraction.