秋季 熊川川의 河床型別 生物相에 關하여 : 魚類, 水生昆蟲 附着藻類

劉奉錫 군산대학교 1978 群山水産專門大學 硏究報告 Vol.12 No.2

1.An ecological survey of life bio Fauna of the stream bed in the UNG CHUN River in CHUNG NAM Who carried during the period of 8 days from Octover 8-15, 1977, at 60 stations as shown in Fig. 1. 2.The relation between the biomass of the stream bed in the UNG CHUN River and environmental factors is as follows. Pool : 26 places(Mean-Depth : 117cm, Verocity : 0.2m/sec. Pebbles : 19cm, Water Temperature : 18℃) Shallows : 20places(Mean-Depth : 35cm, Verocity : 0.43m/sec. Pebbles : 8.3cm, W. T : 18℃) Rapids : 14place(Mean Depth : 11cm, verocity : 0.63m/sec. Pebbles : 6.3cm, W, T : 18.6℃) 3.Existing Fish and water insects, adhere Algae on the stream bed in UNG CHUN River are as follows. adhere Algae of existing quentity : 5.1cc/25cm(Rapids : 44.4%. shallows : 34%. Pools : 21.6%) water insects of existing numbers : 6.8/2.5㎠(Rapids : 53.9%, shallows : 32.8%, Pools : 13.2%.) composing ratio of Fish Pool : 58.5%, shallow 31.2%, Rapid : 10.2%. 4.The author has collected life bio Fauna of Fish, water insects Algae of 4 species of adhere Algae which belong to 3 Oders, and 16 species of the water insects which belong to 5 Oders, 21species fish which belong 5 Oders. 5.The dominant species in all the stations as follows. Adhere Algae : Synedra ulna. Water insect : Epeorus laifolium Fish : Zacco platypus, Caraccius caraccius, Plecoglossus alitivelis. 6.The standing crops of Fishs of the 60 stations in the UNG CHUN River were shown in Table 5 and Fig 4.5.

錦江産 철갑상어의 비늘 特性에 관한硏究

劉奉錫,金鍾連,金容煥 군산대학교 1983 群山水産專門大學 硏究報告 Vol.17 No.3

The morphological characteristics of scales on Acipenser sinensis can be summarized as follows: 1.The form of scales on Acipenser sinensis caught in the Gum river can be classified form of Chrysanthemum, Frying wild goose, Butterfly, Fragment, Dog teeth scales. 2.The longitudinal diameter on the scales of the dorsal part and the lateral part is longer than the transverse diameter of it, but ventral part is contrary. 3.Half of the transverse diameter is divided by the tuber line and both of transverse diameter of dorsal scale are the same length. But above transverse diameters of lateral scales are longer than below length, and in the ventral scale below lengths are longer than above lengths. 4.Unappeared part of scale is not formed by a groove and ridge, form of a net work but appeared part is forms a network, a form of a same mind. 5.The scales having the largest diameter and the smollest diameter are appeared in front of the pectoral fin. 6.The average growth rate of all scales is rapid on anterior than posterior.

囊長網漁業에 混獲되는 出現種에 관한 基礎的 硏究

劉奉錫,李吉來 군산대학교 1984 群山水産專門大學 硏究報告 Vol.18 No.1

This paper deals with results of investigations on the species composition caught by long bag net around Seonyu Island of Gogunsan Area, during the period from April to November in 1979, and results are as follows : 1.A total of 85 species in 54 families was found. It was composed of 71 species (or 83.5% ) of finfishes in 46 families, 8 species (or 9.4%) of Crustaceans in 5 families and 6 species (or 7.1% ) of Cephalopods in 3 families. 2.Each fish can be classified in to followings five in each season groups being change in quantity appearance of the species caught by Long Bag Net. 1).Species caught of small quantity in the whole year round(Subfamparalichthinae, Verasper variegatus, Hexagrammos otakii ) 2).Species caught of Large quantity in the period from April to November(Engraulis japonica, Spepiella japonica Acetes japonicus) 3).Peak time of catches In the period from April to June and finishes in the summer (Pholis taczanowskii(Larva), Ammodytes personatus, Hemiramphus Kurumeus) 4).Peak time of catches in the period September and Octerber, beginning in about August (Trichiurus lepturus, Collichthys fragils, Crustae Larva) 5).The catchies in spring and in autumn season(Engraulidae, Loliginidae Shrimp) 3.Species caught of the Sounyu Island were observed to change three times a year, in April, August and November, in another words, there are three seasonal species caught; the species caught in the period of rise in water temperature from April to July, those in the period of fall in water temperature from August to September and those in the period of low water temperature from December to February or March. 4.Judging from the amount of catchies for fishery at Seonyu Island Gogunsan sea were small ancovy(Engraulis japonica 24.9%), small Northern sand ladn = Ammodytes personatus 6.7%, Acetes japonica 4.89%, Pholis taczanowskii 4.77%, Loligo japonica 4.47%, Penaeus joyneri 3.2%, Trichiurus lepturus 2.8%. 5.Composition of body length of appearing species reaches is at 31.5%(0.5-3cm) Juvenile stage, 55.4%(3.1-7cm) in Yong stage, above 13.1%(7.1-30cm) in Adult stage. 6.Long Bag Net bring about loss in usual Larval stage of marine biologist, it's death means a serious loss to the to the world of science and selfgoverment industry.

[논문]결정화 유리첨가에 의한 BNT 계 세라믹 복합체의 소결 및 유전특성

이우석,이병철,류봉기 釜山大學校生産技術硏究所 2003 生産技術硏究所論文集 Vol.62 No.-

본 연구에서는 BaO-Nd2O3-TiO2계 마이크로파 유전체 세라믹스에 결정화 유리를 첨가하여 적충일체형 RF 수동소자 모률 구현을 위한 저온소결 유전체소재를 개발하고자 하였다. BaO-Nd2O3-TiO2에 결정화 유리를 5~3Owt% 범위로 첨가하여 소결온도를 1300°C 에서 1050 °C 로 낮추었으며, 첨가량의 증가에 따라서 소결밀도의 증가 및 입성장이 뚜렸이 일어났고 결정화 유리를 20wt% 첨가하여 1050 °C의 소결온도에서 95% 이상의 상대밀도를 갖는 소결체를 얻을 수 있었다. 이때 유전율(Er),72,품질계수(Q . f),1500, 공진주파수 온도계수(tf), 22 ppm/°C 을 나타내었으며 이는 LTCC 재료로서 응용가능성이 있다고 판단되었다.

참 우렁 Cipangopaludina malleata의 발생과 성장에 관하여

유봉석 군산대학교 1969 群山水産專門大學 硏究報告 Vol.3 No.2

The development and growth of Cipangopaludina malleata has been investigated five months during the period of Jun. to Dec, 1968. The results obtained are summerized as follows; 1.Cipangopaludina malleata was spawned at 23℃ the average water temperrature for on June to Dec. 2.There was 15 to 38 pieces in the foetalsac of this shell which seem to be a big egg(3.5mm) or larva style(2.8mm) 3.It took approximetely 15 to 20 grow from spawning to post larva(average W.T 23℃) 4.The larva of Cipangopaludina malleata has in average been measured as follows; Shell Length; 2,085mm. Width 2,695mm. Length of Aperture; 1,495mm, Width of Aperture; 1,845mm. 5.The post larva which was grown for five months has five times as large as that of the first.

참게의 移動과 成長에 관하여

劉奉錫 건국대학교 1979 論文集 Vol.9 No.1

From january 1.1976 to December 30. 1976, the migration and growth of the Eriocher sinensis at the 6 stations from upstream habitat to spawning area of Man Kyong River were examined. 1.As the Eriocher sisnensis traveled along the upstream duration showed from March till August and lowstream duration did from August till December. a) Feeding period: early Mar - - late Aug.(spawningArea - - Fresh water) b) Prespawning period: late Aug - - Sept. (Fresh water - - Half sea water) C) Spawning period: late Sept -- late Dec.(Half sea water - - Sea water) 2.The estimated growth of the Eriocher sinensis showed sigmoid curve and Matinal growth after one year on the carapace of Eriocher sinensis from mininum 0.7 mm to miximum 65mm. 3.Composition of average carapace length during one year was from 35 mm to 65 mm miximum carapace length of female is 66 mm and male 68 mm. 4.Relation between the carapace length and width on the growth before and after moulting showed as fallows. a) Before moulting of regression coeficient is 0.92. b) After moulting of regression coeficient is 0.8.

養漁飼料의 添加物로서 라이신 效果에 關한 硏究

劉奉錫,李廷烈,金鐘連 군산대학교 1991 群山水産專門大學 硏究報告 Vol.25 No.2

To investigate the effect of lysine as a additive to fishfeed, a series of studies on Israeli carp(Cyprinus carpio) and eel(Anguilla japonica) were carried out during the cultivation period of 124 days. During the cultivation periods, the daily growth and growth rate were appeard 0.55g and 6.7times for elver, 1.11g and 4.0 times for young eel, 40.97g and 2.8 times for preadult eel, 1.96g and 3.8 times for fingerling carp, 14.94g and 6.1 times for preadult early, and 161.31g and 2.0 times for adult Israeli carp, respectively. The effect of lysine as a additive to fishfeed were respectively showed superior results in 0.3% for elver, in 0.1% for young eel, and in 0.5% for Israeli carp. But not shown the effect of lysine in preadult of eel. As a results, it was considered that a amounts of lysine added recommend to fishfeed 0.1% of lysine for elver and 0.5% for Israeli carp.

짱뚱어 屬 魚類의 비늘 特性에 關한 硏究

劉奉錫 군산대학교 1979 群山水産專門大學 硏究報告 Vol.13 No.1

Boleophthalmus chinensis and B. sp have not classified yet, and left in confusion. so I have here classified. them by the available data of scale structure and a lot of speciments. Being based on the research of KOBAYASI, H(1937) and MATSUBARA,K(1957). The taxonomy of them has been done by distribution of scale(table2), the number of lateral line scale (Table3), relation of longitudinal diameter and transverse diameter(Fig 3), and the number of groove(Table4). By above traits, the following two forms may be splited as shown ill the next key. A1 Number of lateral line scale is 100-230, the relation of longitudinal diameter and transverse diameter ill body surface makes intersection. b1 The Number of lateral lisle scale is 100-150(140±0.021 on average). Relation of longitudinal diameter and transverse diameter makes intersection at caudal peduncle‥‥‥B . chinensis. b2 The Number of lateral line scale is 180-230(203.8±0.032 on average). Relation of longitudinal diameter and transverse diameter makes intersection at anterior trunk ‥‥ B. sp. Above two species have not any trait for the assertion of them simultaneously from each scale structure, However, they not only have intersectional relation of longitudinal diameter and transverse diameter in body surface but also make clear difference in the number of leteral line scale. Therefore it goes without saying that each of them is independent species.

재생골재 콘크리트의 수축균열 특성에 관한 연구

구봉근,라재웅,이재범,류연종,이현석 충북대학교 건설기술연구소 2003 建設技術論文集 Vol.22 No.2

As concrete is prevented from shrinking freely, tensile stresses develop which frequently result in cracking. Cracks in reinforced concrete structures reduce overall durability by allowing the penetration of water and aggressive agents, thereby accelerating the deterioration of the reinforcing steel. Highway pavement, bridge decks, and industrial floors are especially susceptible to this type of deterioration since these structures exhibit high rates of shrinkage and are frequently exposed to aggressive environmental conditions. The objectives of this investigation included the implement of experimental procedures for assessing shrinkage cracking behavior on recycled aggregate concrete, the selection of replacement rate and mix composition on recycled aggregate concrete. Specifically, the influence of a shrinkage reducing admixture(SRA) and recycled aggregate concrete was investigated. The shrinkage reducing admixture substantially reduces free, shrinkage and restrained shrinkage cracking while providing similar mechanical properties. Restrained shrinkage experiments were developed and shrinkage cracking was shown to be size dependent and recycled aggregate replacement rate. A mechanical properties experiment approach was developed to predict the behavior of a variety of recycled aggregate concrete specimens. This experimentally approach was used to successfully explain experimental results from a variety of mixture compositions and recycled aggregate concrete. This experiment was used to demonstrate the influence of material and structural properties on the potential for cracking.

공작기계 주축용 베어링 결함 자동진단시스템의 개발

정의식,강형모,류봉조,임경빈,고준빈,박수규 한밭대학교 산업과학기술연구소 1995 논문집 Vol.3 No.-

This paper deal with a method of detecting localized defects on taper roller bearing in main spindle of machine tool system. The statistical parameters in time-domain signal processing techniques have been calculated to extract useful features from bearing vibration signals. Emloying these features, the statiscical parameters have been established to detect defects on the rollers of bearings, respectively, and used by the input feature of an artificial neural nerwork. As a result that the proposed bearing defects monitoring system could be successfully performed by using the statistical parameters of acceleration signals.