이동기 민물도요 Calidris alpina의 지방과 단백질의 보유

권기정(Ki-Chung Kwon),유용태(Yong-Tae Woo) 한국조류학회II 1995 한국조류학회지 Vol.2 No.1

흰배지빠귀(Turdus pallidus)의 song theme과 변이

이찬우(Chan-Woo Lee),권기정(Ki-Chung Kwon) 한국조류학회II 2000 한국조류학회지 Vol.7 No.1

추진제탱크 가압용 인젝터 출구에서의 유동가시화 및 해석

권오성(Oh-Sung Kwon),한상엽(Sang-Yeop Han),권기정(Ki-Jung Kwon),정용갑(Yong-Cahp Chung) 한국항공우주학회 2010 韓國航空宇宙學會誌 Vol.38 No.1

추진제탱크 가압용 인젝터는 액체추진기관 발사체의 가압시스템에서 추진제탱크로 유입되는 가압가스의 유속을 감소시키고 이를 적절히 분산시키기 위해 사용된다. 인젝터의 형상에 따라 추진제탱크 내부 얼리지의 온도분포가 달라지게 되는데, 이것은 가압가스 소모량과 추진제탱크 내의 열적인 현상들에 영향을 미친다. 본 논문에서는 추진제탱크 얼리지가 성층화된 온도분포를 가질 수 있도록 하는 디퓨저 형상의 인젝터에 대하여 출구 유동형태를 살펴보았다. 입자영상유속계 기법을 이용하여 제작된 인젝터 출구에서의 가압가스 유동을 가시화하였고, 이를 CFD 해석결과와 비교하였다. 해석결과는 측정결과와 비교적 잘 일치하였고, 이것을 추진제탱크 얼리지 해석에 있어 입구조건으로 사용하여 얼리지의 상태를 확인하였다. Propellant tank pressurizing gas injector is used in the pressurization system of liquid propellant rocket to reduce incoming gas velocity and distribute the gas in the tank. Temperature distribution in the propellant tank ullage is varied according to the gas injector shape, and it has influence on the required pressurant gas and thermal phenomena in the tank. In this paper, diffuser type gas injector was studied to make the ullage have stratified temperature distribution. Injected gas flow at the outlet of prototype diffuser was visulized using particle image velocimetry method and it was compared with the results of calculation. Calculation was well agreed with measurement and was used as an inlet condition of propellant tank ullage calculation.

포항지역 조류의 종 다양성

이원호(Won-Ho Lee),이찬우(Chan-Woo Lee),장지덕(Ji-Doek Jang),권기정(Ki-Chung Kwon) 한국조류학회II 2001 한국조류학회지 Vol.8 No.2

洛東江 河口의 鳥類相

權奇政 인제대학교 낙동강환경연구소 1992 심포지움(인제대학교 부설 환경연구소 발표논문집) Vol.- No.1

많은 연안의 저습지와 하구는 개발에 의해 위협을 받고 있다. 만약 이들 지역이 모두 변한다면 섭금류와 수금류는 그곳에서 채식과 휴식을 할 수 없으므로 다른 곳으로 이동을 하거나 혹은 죽을 것이다. 그러나 어느 한 부분만이 개발이 된다면 전체 지역을 이용하고 있던 새들이 제한된 지역에 적응할 수 있느냐는 의문이 제기된다. 이 것에 대한 일반적인 답은 새들은 현재 이용하고 있다고 생각하는 면적보다 더 적은 지역에서 물리적으로 기숙할 수 있거나, 더 접합한 장소를 발견한다면 어느 곳이라도 기숙을 할 수 있다는 것이다. 그러나 그 지역에 새의 밀도가 증가하면 각 개체의 먹이 섭취률이 감소하기 때문에 생존의 기회는 어느 쪽이나 감소할 것이다(Goss-Custard, 1980). 그 중 가장 중요한 것은 일정 지역에 나타나는 각 종의 수를 제한하는 요인과 이들 제한 요인이 한 해의 어느 시기에 영향을 미치느냐에 대한 해답을 구하는 것이다.

韓國에 있어서 고니類 Cygnus의 越冬行動과 採食物 調査

權奇政 東亞大學校 1981 東亞論叢 Vol.18 No.1

Three species of swans migrate to Korea. They are the Whooper swan, Cygnus cygnus, the Eastern bewick's swan, Cygnus columbianus jankowskii, and the Mute swan, Cygnus olor. The last is a rare winter visitor. The typical wintering ground of swans in Korea is the Nagdong delta where about two to three thousand Whooper and Bewick's swans annually visit for wintering. Less than 200 Whooper and Bewick's swans arrive and winter on the Jindo seashore and on Dunjeon reservoir on this island. About 260-370 Whooper and Bewick's swans migrate to Junam reservoir (210ha) in Gyeongnam province and a smaller number of swans arrive at Samnam reservoir (70ha) nearby. On some ponds, streams, and reservoirs newly made with dam construction, two or three wintering swans, and sometimes less than ten swans, may be seen. At times, a similar number of wintering swans may be seen on some southern islands, but no wintering swan were observed on the western seashore. It is interesting to notice some Mute swans alone winter on some lakes on the eastern seashore. Recently, On Jaunary 8, 1980 the author was fortunate enough to discover some 145 wintering Mute swans on Hwajinpo reservoir near Geojin, Goseong-gun in Gangweon-province. This mute be the largest population of wintering Mute swans ever recorded in Korea. Hwajinpo reservoir, which is a relic lake overflowing into the sea, is one of the least polluted reservoirs, having surface area of 2,019,600㎡. The brackish water seems to have become a wintering ground exclusivly for Mute swans. Hence, the proper conservation of this resevoir for Mute swans should be established immediately. Since October 31, 1962, hunting in the Nagdong river areas has been prohibited by the Office of Forestry, and the Bureau of Culture Property Preservation designated those areas as a natural monument as of July 13, 1966. the government designated Whooper and Eastern bewick's and Mute swans as Natural Monument No.201 on May 30, 1968. Therefore we all should take positive measures to preserve those areas of Nagdong river for wintering swans. 1. This survey of the wintering behaviour and feeding of the swan, Cygnus, was conducted from 1974 to 1981 in the delta area of the Nagdong river in Busan city, the branches of the river, Junam reservoir in Gyeongnam province, relic lakes in Gangweon province, and Jindo in Jeonnam province in Korea. 2. The observation of the wintering behaviour and feeding of these swans was done through a telescope, and aquatic animals and plants were collected by using Quadrate and Bottom sampler. 3. A total of 10,027 individual swans were observed from 1980 to 1981, among which 1,853 were juveniles. A total of 82.4% of the entire individuals was observed at the delta area and 16.3% at Junam reservoir. These two areas were the main wintering grounds of swans. The relic lake in the northeast. coastal areas in Gangweon province were unique wintering grounds for mute swans in Korea. 4. The number of swans observed in the delta area was 367.5±88.6 in December, 329.5±82.5 in January, 166.6±44.4 in February and 69.42±10.2 in March. Therefore the number decreased from January to March. 5. The average family size was 5.42 individuals in the delta area and 5.92 at Junam reservoir. Families of 7.73 individuals and 7.08 individuals were observed at Naedong and Seongsan, larger than those at the delta area and Junam reservoir. 6. The average frequency of daily flight was 26.33 at the delta area and 65.8 at Junam reservoir in December and this increased 66.67 and 71.0 in January respectively. The average frequency of flight was: 0.5 from 8:00 to 9:00 am, 26.3 flight from 2:00 to 5:00 pm in the delta area, and 0.16 flight 8:00 to 11:00 am, 25 flight from 1:00 to 5:00 pm in Junam reservoir. The average frequency of flight was higher in afternoons than in forenoons. 7. The flight frequency at the delta area was active between Jangrim dong and Zion island(4km) in December, and it was active between Jangrim dong and Myeonggeomeori(2km) in January. The average frequency of flight was 20 and 66 respectively. 8. The weight of fresh and dry food, plant and animals, obtained from survey are as were as follows: 1) Junam reservoir: A total 292 individuals of 8 species were collected among which Trapa natans was 76 individuals(26.02%), Phragmites longivalvis 68(23.29%), Zijania Caduciflora 36(12.33%). The average weight of fresh food was Trapa natans 15.81g, pharagmites longivalvis 6.58g and Zijania caduciflora 19.68g. The average weight of dry food was: Trapa natans 1.42g, phragmites longivalvis 2.19g and Zijania caduciflora 6.24g. 2) Delta area: (1) Jangrom dong The collected plants were: 126 individuals phragmites longivalvis and 120 Scirpus trigueter. The aquatic animals collected were: 130 individuals Nereis japonica, 85 Corbicula elatior and 26 Mya japonica. The mean weight of fresh food was phragmites longivalvis 13.14g, Scirpu strigueter 2.31g, Nereis japonica 0.17g, Corbicula elatior 3.87g, and Mya japonica 2.07g, The average weight of dry food was: Phragmites longivalvis 2.99g and Scirpus trigueter 0.39g. (2) Myeonggeomeori The species of plants collected was 78 Phragmites longivalvis and 144 Scirpus trigueter. The average weight fo fresh food was:Phragmites longivalvis 10.57g and Scirpus trigueter 2.25g. The average weight of dry food was Phragmites longivalvis 2.37g and Scirpus trigueter 0.24g. The aquatic animals collected were 259 individuals of 9 species, such as 79 Sesarma dehaani(16.42%), 66 Nereis japonica(13.72%), 34 Corbicula elator(7.07%), 31 Upogebia major(6.44%), 18 Mya japonica(3.74%) and 18 Littorina brevicula(3.74%). The average weight of fresh food was: Sesarma dehaani 0.2g, Nereis japonica 0.1g, Corbicula elator 3.51g, Upogebia major 0.01g, Mya japonica 1.42g and Littorina brevicula 0.08g. The shells of Mya paponica were frequently found in the swan's feces. 3) Hwajinpo: Twenty nine Phragmites longivalvis and 12 species of algae were collected. The average weight of fresh plants was 32.33g, and that of dry plants was 3.27g. The total dry weight of algae was: blue algae 0.96g, green algae 2.22g, brown agae 2.29g and red algae 0.57g.

월동기 민물도요 Calidris alpina의 지방과 단백질의 변화

권기정,함규황 한국환경과학회 1992 한국환경과학회지 Vol.1 No.1

The changes of pectoral muscle size (as an index of protein reserves) and fat reserves (as an index of lipid) were measured in wintering Dunlin during 1988-1989 on two estuaries located in the south coast of Korea. The mean of lean mass of February population was greater(11.8%) than that of October population. SMI of October population was greater(4.5%) than that of February population and lipid index of October population also greater(1.6 %) than that of February population. This, show that the body condition of October population is better than February population. The mean of fat and protein reserves of 22% of Dunlin arriving on October for their wintering were higher than that of others, this group seems to continue their migration to south further and 11 % of the wintering population seems to starve during winter.

진해 일대 조류의 종 다양성

이원호,장지덕,최병인,강성룡,김성진,권기정 동아대학교 부설 기초과학연구소 2004 基礎科學硏究論文集 Vol.21 No.1

본 연구은 진해항 일대의 조류상을 조사ㆍ분석한 것이다. 조사는 2001년 12월부터 2002년 4월까지 28회를 조사하였다. 센서스 기간 중 총 61종의 조류를 조사 지역내에서 관찰할 수 있었으며, 연 55,115개체가 관찰되었다. 종수의 합계와 총 개체수 그리고 종별ㆍ개체별 출현 빈도에서 유도된 종 중요도는 불은부리갈매기[0.58], 괭이갈매기[0.14], 흰죽지[0.12], 고방오리[0.07], 민물도요[0.07], 참새[0.06], 재갈매기[0.06]가 중요한 종으로 나타났다. 월별 최대 관찰 개체수는 2001년 12월에 46종 5,993개체를 관찰하였으며, 2002년 1월에 37종 7,105개체, 2월에 37종 8,837개체, 3월에 38종 4,106개체, 그리고 4월에 32종 2,819개체를 관찰하였다. 종 풍부도는 4월에 가장 높게 나타났으며, 종 다양성과 균등도는 1월이 가장 높게 나타났다. 월별 종의 유ㆍ무와 개체수를 비교하여 양방향 유사도를 분석한 결과 2월과 3월의 조류 군집이 유사한(0.69: Pearson Correlation Index) 것으로 나타났고, 다음으로 1월(0.617), 12월(0.522)로 12, 1, 2, 3월이 하나의 cluster를 형성하고 있었으며, 4월이 틀린 cluster를 형성하고 있다. 수금류, 섭금류, 갈매기류, 참새류 등 4가지 중요 군집으로 구분하여 개체수를 비교한 결과 66%가 붉은부리갈매기 외 3종의 갈매기류였고, 21%가 혹부리오리 외 13종의 수금류, 7%가 붉은머리오목눈이 외 21종의 참새목, 5%가 흰물떼새 외 5종의 섭금류, 1%미만의 맹금류, 논병아리류, 가마우지류의 조류로 나타났다. We investigated the abundance and local distribution of birds, in four areas of the jinhae. Data were collected from four areas in the jinhae from 2001 to 2002. In this study, 55115 individual birds of 80 species were censused. We evaluated important species with abundance of birds were as follows: Black-headed Gull[0.58], Black-tailed Gull[0.14], Pochard[0.12], Pintail[0.07], Dunlin[0.07], Tree Sparrow[0.06], and Herring Gull[0.06]. The number of species and individuals in each month were recorded as follows: 5993 individual birds of 46 species in December(2001), 7105 individual birds of 37 species in January(2002), 8837 individual birds of 37 species in February, 4106 individual birds of 38 species in March, 2819 individual birds of 32 species in April. In study period, the april was the highset richness(R' =0.60) and the January was the highest diversity(H'=2.08) and evenness(E5=0.52) with an expected species number of E[S_(818)]=29. Pairwise similarity declined with increasing distance between recording month and recording month from two different clustered separately in a UPGMA cluster tree. Comparison of population variable at 4 sites of 4 classes was compared as follows: 1.Gull(66%), 2. Waterfowl(21%), 3. Passerine(7%), and 4. Wader(5%).

월동기 민물도요 Calidris alina 의 지방과 단백질의 변화

권기정,함규황 東亞大學校附設基礎科學硏究所 1992 基礎科學硏究論文集 Vol.9 No.1

The changes of pectoral muscle size (as an index of protein reserves) and fat reserves (as an index of lipid) were measured in wintering Dunlin during 1988-1989 on two estuaries located in the south coast of Korea. The mean of lean mass of February population was greater(11.8%) than that of October population. SMI of October population was greater(4.5%) than that of February population and lipid index of October population also greater(1.6%) than that of February population. This show that the body condition of October population is better than February population. The mean of fat and protein reserves of 22% of Dunlin arriving on October for their wintering were higher than that of others, this group seems to continue their migration to south further and 11% of the wintering population seems to starve during winter.