• 제목/요약/키워드: bird type

검색결과 141건 처리시간 0.034초

개발사업에 따른 조류종 영향평가모형 개발 및 적용 (Impact Assessment Model of Bird Species for Land Developments)

  • 이동근;김은영;이은재;송원경
    • 환경영향평가
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    • 제19권3호
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    • pp.347-356
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    • 2010
  • Forests are being seriously fragmented as a result of land development. Land development with disregard to its subsequent environmental impacts is a primary threat to biodiversity by incurring massive habitat losses and changes in structure and composition of forests. The purpose of this study was to develop the impact assessment model for quantitative distance or degree of disturbance by land developments. This study conducted a survey about structure and composition of forest species to determine degree of impact from land development. The edge effect of forest fragmentation on the number of bird species, population size, and bird diversity was obvious. In particular, the bird diversity sharply declines around the forest edge where intensive land development projects take place. To assess the disturbance of forest species, the factors selected were the bird diversity and the rate of edge species. The impact assessment model about bird diversity was explained by type of forest fragmentation and type of vegetation ($R^2$=0.23, p<0.005). The other model about edge species explained by a distance, type of forest fragmentation, type of vegetation, and width of road ($R^2$=0.34, p<0.001). In order to test the applicability of the model developed in this study, the models was applied to the Samsong housing development in Goyang-si, Gyunggi-do. The impacts of land development on the bird species were reasonably quantified to suggest effective mitigation measure. The impact assessment model developed in this study is useful to assess the magnitude of disturbance of bird species. Particularly, the model could be applied to the current Environmental Impact Assessment practices to predict and quantify the impacts of land developments projects on forest bird species.

삼국시대(三國時代) 요패(腰佩)의 형식(形式) 및 그 상징성(象徵性)에 대한 연구(硏究) - 대형요패(大形腰佩)의 형식분류(形式分類)를 중심(中心)으로 - (A Study on the Type and Symbolism of Yopae in the Ere of the Three Kingdoms - Mainly Classifying the Type of the Big Yopae -)

남자 만성피로의 형상의학적 고찰 (Study on Male Chronic Fatigue in Hyungsang Medicine)

  • 박태숙;이용태
    • 동의생리병리학회지
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    • 제19권3호
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    • pp.605-611
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    • 2005
  • Chronic fatigue refers to the tiredness which disturbs one's daily activities and lasts more than six months without the sign of improvement by rest or sleep. Male chronic fatigue is included in internal injuries due to overstrain and exhaustion and closely related to river, spleen, stomach and kidney out of five Jang organs. Male chronic fatigue is based on the deficiency of Yang and aggravated by liquor, sex and emotional depression. Chronic fatigue has the following features in Hyungsang ; an inclination for lying: unwillingness to everything; drooping eyes and feeble voice; yellow pale complexion; withered ears; redness on the tip of nose; cheekbone, and lips; blood shot eyes; dryness and loss of hair. Male chronic fatigue usually attacks the persons of horse type and bird type because they are hyperactive compared with what they eat. The following medicines are commonly prescribed for the treatment of male chronic fatigue. Ssangwhatang, Sokunzungtang, and Yanghyulsamultang are commonly prescribed to horse type. Jaumkangwhatang, Chungsimyunzaum, Yookmijiwhangtang to bird type. Palmiwhan, Gozinumja. and Shinkihwan to fish type. Bozungikkitang, Galwhahaesungtang, Samchulgunbitang and Sipjundaebotang to turtle type.

엔터테인먼트용 조류형 2족 보행 로봇의 설계 및 구현 (Design and Implementation of a Bird Type Biped Robot for Entertainment)

  • 김동진;유승환;신윤덕;장승익;기창두
    • 한국정밀공학회지
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    • 제22권3호
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    • pp.38-45
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    • 2005
  • In this paper, a bird type biped robot for entertainment controlled by R/C servo motors, is built using the embedded RTOS (Real Time Operating System). ${\mu}C/OS-II$ V2.00 is used fur RTOS and the board 80C196KC for main CPU. A control algorithm of R/C servo motors is proposed on ${\mu}C/OS-II's$ preemptive and deterministic property without any extra PWM module. The realized biped robot has 19DOF, that is, 12DOF for both legs, 6DOF for both arms and 1DOF for neck. To verify the proper walking process, ZMP(Zero Moment Point) theory is applied and the simulation has been done by ADAMS.

Packet Transceiver on 2.4GHz for Whooper Swan

  • Nakada, Kaoru;Nakajima, Isao;Hata, Jun-ichi;Ta, Masuhisa
    • Journal of Multimedia Information System
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    • 제5권2호
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    • pp.91-98
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    • 2018
  • We devised a bird-borne transceiver unit for S-band packet radio communications based on the CC2500 transceiver, a device manufactured by Texas Instruments (TI). Our assessments determined the optimal parameters needed to achieve successful bird-to-center communication over a distance of 18 km and bird-to-bird communication over a distance of 200 m. These parameters included optimal modulation methods, transmission rates, and antennas. We equipped the transceiver unit with a modified dipole antenna (collinear antenna), which we tested in a 10 m anechoic chamber. Our experimental assessments and circuit design review identified the following parameters: 2FSK modulation method; 14.28 kHz frequency shift; 101.56 kHz IF reception bandwidth; and Manchester encoding (+). Our assessments showed bird-to-bird communications could be achieved over a distance of 200 m assuming MSK, FEC (+), and 500 kbps. Following tests by an official body, we obtained 28 sets of a type approval license for 2.4 GHz. In cooperation with the Yamashina Institute for Ornithology, we attempted to tag and release six or more swans. This unit gives us the ability to obtain vital data on swans. We expect this data to provide significant benefits, including clues on improving screening for infected individuals.

코뼈 골절 수술결과 평가에 있어서 Bird's Eye View의 유용성 (Clinical Usefulness of a Newly Standardized Bird's Eye View Clinical Photography in Nasal Bone Fracture)

  • 박동권;최재훈;이진효
    • 대한두개안면성형외과학회지
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    • 제12권2호
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    • pp.97-101
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    • 2011
  • Purpose: Nasal bone fracture is the most common type of facial bone fracture. The standard 6-view photography was not adequate to support the evaluation of nasal deformity and the results of closed reduction. The authors have standardized a bird's eye view photography to more effectively evaluate this nasal deformity. Methods: We reviewed the medical records and radiologic studies of 63 nasal bone fracture patients. We had taken clinical photography including bird's eye view that was standardized as nasal tip was aligned to Cupid's bow of upper lip and light was focused on the nasion of all 63 patients. Results: Nasal deviations and reductions were more noticeable on the newly standardized bird's eye view. This clinical photography was very useful to explain the results of reduction. Conclusion: It was concluded that this photography can be more reliable for evaluation of severity of nasal deformity and the result of closed reduction.

백두대간보호지역의 천왕봉에서 악휘봉 구간에 서식하는 조류의 다양성에 영향을 주는 생태적 요인 (Ecological Factors Influencing the Bird Diversity on Baekdudaegan Protected Area Cheonwangbong to Aghwibong Region)

  • 황현수;노두리;이윤경
    • 한국환경생태학회지
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    • 제38권1호
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    • pp.48-54
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    • 2024
  • 본 연구는 백두대간보호지역의 천왕봉에서 악휘봉 구간을 대상으로 조류의 다양성에 영향을 주는 서식지 요인을 구명하기 위해 2021년 4월부터 2022년 12월까지 수행되었다. 백두대간보호지역의 천왕봉에서 악휘봉 구간은 공간적 규모가 736.4km2로 광범위하고 다양한 서식 환경이 혼재하는 지역이다. 그에 따라 조사지역은 서식지 동질성 분석을 통해 3km×3km의 조사구를 선정하여 20개의 조사구를 대상으로 수행하였다. 조사지역의 서식지 환경과 조류의 다양성 사이의 관계를 분석한 결과 조류 군집의 다양성은 육상곤충의 다양성을 비롯하여 경사도, 서식지의 평균 면적, 임상과 해발고도, 농경지와의 거리와 직·간접적으로 관련이 있는 것으로 나타났다. 서식지의 경사도를 비롯한 임상, 농경지로부터의 거리는 먹이원의 발생에 직·간접적으로 영향을 주며 서식지의 평균 면적과 임상은 서식지의 구조적 다양성과 밀접하게 관련된다. 따라서 조류 군집의 다양성은 서식지 내 먹이의 발생량과 서식지의 다양성에 영향을 받는 것으로 판단된다. 본 연구의 조류 군집과 서식지 환경의 관계는 조류 군집의 다양성 증진을 위한 산림의 관리방안을 수립하는데 기초 생태 자료가 될 수 있을 것으로 판단된다.

Escape Behavior of Medaka (Oryzias latipes) in Response to Aerial Predators of Different Sizes and with Different Attack Speeds

  • Lee, Sang-Hee
    • Proceedings of the National Institute of Ecology of the Republic of Korea
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    • 제3권1호
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    • pp.47-53
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    • 2022
  • The escape behavior of prey fish to predator attack is directly linked to the survival of the fish. In this study, I explored the escape behavior of Medaka fish to bird attacks. To simulate the attack, I designed a model triangular-shaped bird to slide along a fishing line connected between rods at both ends of the tank. The triangular shape was set to 10×15 (S=1), 15×20 (S=2), and 20×25 cm (S=3) with base×height. The slope (θ) of the fishing line, which determines the attack speed of the model bird, was set to values of 15° (θ=1), 30° (θ=2), and 45° (θ=3). The escape behavior was characterized using five variables: escape speed (ν), escape acceleration (α), responsiveness (γ), branch length similarity entropy (ε), and alignment (ϕ). The experimental results showed when (S, θ)=(fixed, varied), the change in values of the five variables were not significant. Thus, the fish respond more sensitively to S than to θ In contrast, when (S, θ)=(varied, fixed), ν, α, and γ showed increasing trends but ε and ϕ did not change much. This indicates the nature of fish escape behavior irrespective of the threat is inherent in ε and ϕ. I found that fish escape behavior can be divided into two types for the five physical quantities. In particular, the analysis showed that the type was mainly determined by the size of the model bird.

만경강 지역 조류군집의 특성과 관리 방안 (Characteristics of Bird Community in Mangyeong River Area)

  • 이우신;박찬열;임신재;허위행
    • The Korean Journal of Ecology
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    • 제25권3호
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    • pp.131-137
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    • 2002
  • 본 연구는 1999년 8월부터 2000년 6월까지 총 4회에 걸쳐 만경강의 조류군집 특성과 관리 방안을 파악하고자 조류군집과 서식환경을 조사하였다. 만경강에서 조류의 서식환경으로 논이 차지하는 비율이 가장 높았으며, 수역, 갯벌, 관목지대, 주거지, 비닐하우스의 순으로 나타났다. 총 88종의 조류가 관찰되었고, 종수는 10월에 58종으로 가장 많았으며, 개체수는 1월에 7,084개체로 가장 많았다. 만경강지역 조류군집의 특성은 잠수성 오리류의 종수가 적고, 상류와 하류의 지역별 서식환경의 차이에 따라 물새의 분포양상이 다르게 나타났다. 수면성 오리류는 삼례대교 상류지역에 주로 분포하였으며, 도요 물떼새류는 하류지역의 갯벌을 주로 이용하였다. 따라서 만경강에 다양한 조류를 서식하게 하기 위해서는 일부 지역에 수심이 1m 이상 되는 지역을 인공적으로 조성하여 잠수성 오리류의 서식을 유도하고, 농경지로 이용되고 있는 하변지역을 관목식생지로 복원할 것을 제안한다.

만경강 지역 조류군집의 특성과 관리 방안 (Characteristics of Bird Community in Mangyeong River Area)

  • 이우신;박찬열;임신재;허위행
    • The Korean Journal of Ecology
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    • 제25권2호
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    • pp.61-67
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    • 2002
  • 본 연구는 1999년 8월부터 2000년 6월까지 총 4회에 걸쳐 만경강의 조류군집 특성과 관리방안을 파악하고자 조류군집과 서식환경을 조사하였다. 만경강에서는 조류의 서식환경으로 논이 차지하는 비율이 가장 높았으며, 수역, 갯벌, 관목지대, 주거지, 비닐하우스의 순으로 나타났다. 총 88종의 조류가 관찰되었고, 종수는 10월 58종으로 가장 많았으며, 개체수는 1월에 7.084개체로 가장 많았다. 만경강지역 조류군집의 특성은 잠수성 오리류의 종수가 적고, 상류와 하류의 지역별 서식환경의 차이에 따라 물새의 분포양상이 다르게 나타났다. 수면성 오리류는 삼례대교 상류지역에 주로 분포하였으며, 도요?물떼새류는 하류지역의 갯벌을 주로 이용하였다. 따라서 만경강에 다양한 조류를 서식하게 하기 위해서는 일부 지역에 수심이 1m이상 되는 지역을 인공적으로 조성하여 잠수성 오리류의 서식을 유도하고, 농경지로 이용되고 있는 하변지역을 관목식생지로 복원할 것을 제안한다.