꺅도요류의 도래현황과 외형적 특징에 관한 연구

박종길(Jong-Gil Park),원일재(II-Jae Won),채희영(Hee-Young Chae) 한국조류학회II 2007 한국조류학회지 Vol.14 No.2

본 조사는 꺅도요류의 도래현황과 종간 외형적 차이를 파악하기 위해 2007년 3월부터 10월까지 대흑산도 북쪽에 위치한 배낭기미습지에서 실시하였다. 조사 결과 꺅도요(Gallingo gallinago), 바늘꼬리도요(G. stenura), 꺅도요사촌(G. megala)의 3종 555개체(봄 217개체, 가을 338개체)가 관찰되었으며, 이중 3종 113개체를 포획 조사하였다. 포획 개체의 종 구성은 꺅도요 51개체, 바늘꼬리도요 46개체, 꺅도요사촌 16개체였다. 꺅도요류 3종의 통과시기에 있어서 종간 뚜렷한 차이를 보였다. 봄철 꺅도요는 3월 13일 처음 모습을 보였으며, 꺅도요사촌은 1개월 후인 4월 12일에, 바늘꼬리도요는 4월 25일에 관찰되었다. 남하시기에는 바늘꼬리도요가 8월 8일 모습을 보이기 시작하였고, 8월 22일에 꺅도요가 그 뒤를 이었으며, 8월 23일에 꺅도요사촌이 도착하였다. 꺅도요사촌과 바늘꼬리도요는 봄·가을 개체수에서 큰 차이가 있었다. 바늘꼬리도요는 봄 북상시기에 19개체가 통과하였지만 가을 남하시기에는 134개체가 통과하였다. 반대로 각도요사촌은 봄에 56개체가 통과한 반면, 가을에는 8개체가 통과하였다. 지금까지 알려진 바와 달리 꺅도요사촌 수컷은 20장의 꼬리깃을 가지며, 암컷은 18장을 가지는 경우가 많았다. 또한 수컷의 꼬리 길이가 암컷보다 뚜렷하게 길어 큰꺅도요-(G. hardwickii)와 거의 같은 길이로 나타났다. 이같은 차이는 꺅도요사촌이 성적 이형이 나타날 수 있음을 보였다. 18장의 꼬리깃을 가지는 꺅도요사촌 암컷은 크기가 수컷보다 크고, 외형적 특성으로 인하여 가락지 부착조사에서 조차도 큰꺅도요와 구별이 매우 어려웠다. 결과적으로 외형적인 특징, 꼬리깃 수만으로 꺅도요사촌과 큰꺅도요의 구별은 불가능하고, 꼬리깃 형태와 측정자료 비교, 분석을 통해서 종 동정이 가능한 것으로 나타났다. 또한 큰꺅도요가 포획되지 않아 한반도 서부에서는 희귀하게 통과하거나, 일부 지역에 한하여 통과할 가능성도 있으므로 국내 큰꺅도요의 분포권, 도래실태, 동정방법에 대한 재조명이 요구된다. Specific differences in timing of migration and morphological difference among four Snipes were monitored at Baenanggimi reed-bed, northern part of Heuksando Island (34˚41' N, 125˚25' E) from early May to late October 2007. We monitored a total of 555 individuals (217 in spring and 338 in autumn) of three snipe species the Common Snipes (Gallingo gallinago), the Pintail Snipes (G. stenura), and the Swinhoe's Snipes (G. megala) and ringed 111 individuals (51 Common, 46 Pintail, and 16 Swinhoe's Snipe) by mist-netting survey. The timing of migration was significantly different among three species. In Spring, the first observation of the Common Snipe was on 13th March, about one month earlier than that of the Swinhoe's and the Pintail Snipes. The Swinhoe's and the Pintail Snipes were seen on 12th April and on 25th April, respectively. In Autumn, the Pintail Snipe was firstly observed on 8th August, the Common Snipe on 22th August and the Swinhoe's Snipe on 23th August. The Common Snipes stayed until early November and then all moved away. The population sizes of the Pintail and the Swinhoe's Snipes were different between spring and autumn migration. In spring the Pintail Snipe were not common, but it was abundant as the Common Snipe in autumn. Conversely, the Swinhoe's Snipe were common in spring and rare in autumn. Generally, the male Swinhoe's Snipe had 20 rectrices and the female had 18. The rectrices of male were significantly longer than those of female, and were almost same length as those of the Latham's Snipe (G. hardwickii). The data from this study were very different from those of Prater (1977) and Hayman et al.(1986). We suggest that the Swinhoe's Snipe has sexual dimorphism like the Latham's Snipe. There is reasonable possibility of mis-identification between the Swinhoe's Snipe with 18 rectrices and the Latham's Snipe even in hands. Actually, the identification was very difficult both in fields and hands. So, the patterns of rectrices, numbers of rectrices and measurements data were examined for correct identification in the lab. According to our results, the Latham's Snipe are probably a very rare passage migrant, at least in western parts of Korea. More intensive surveys on its distribution, status and identification are still needed in fields.

나노위성 전개형 태양전지판 전개시험 및 교훈

김민기,최원섭,김진형,김지석,임철호,이성호 한국항공우주학회 2023 韓國航空宇宙學會誌 Vol.51 No.4

This paper describes the methodologies and lessons learned of deployable solar panel for nanosatellites with the case of deployable tests of SNIPE solar panel. Nanosatellites with high power requirement such as SNIPE have deployable solar panels, so proper deployment of solar panel is essential part for their successful mission. Deployable solar panels of SNIPE was developed by the engineering qualifying model(EQM) and flight model(FM) philosophy similar to other parts of SNIPE. Unlike the deployment tests for EQM, many problems of tests for FM occurred. It is concluded that the main causes of the problems are categorized into three parts. First is shape changes of FM hinge, second is assembly faults, and third is faults in the design of the hinge. Developers changed the exactly same parts of EQM from FM, assembled again the solar panel, and did the corrections in individual unit level. It is introduced that the importance of shape management and a range of propositions to help the design of deployable solar panel hinge for future projects.

SNIPE위성의 부품 배치를 위한 벡터 분석

조동현(Dong-Hyun Cho) 한국항공우주학회 2019 한국항공우주학회 학술발표회 논문집 Vol.2019 No.4

김원일 소설에 나타난 에코페미니즘적 사유 -「도요새에 관한 명상」과 『아우라지로 가는 길』을 중심으로

이숙 원광대학교 인문학연구소 2020 열린정신 인문학연구 Vol.21 No.2

Writer Kim Won Il thoroughly showed narrations of survival attempts and finding his father, who is his root. He shows narrations of survival that have spread to all of mankind, which pursues coexistence with nature in the novella 「Meditation on the Snipe」 and the novel 『The Road to Auraji』. This article observed these two works, which both actively express ecological problem awareness and speak about social issues. In this present time of unprecedented ecological crisis, the implications of eco-feministic visions that focus on ‘relationships with nature’ and ‘relationships among people’ are great. The writer makes prosecutions of reality regarding environmental destruction such as diagnoses of ecological crises and further, ultimately explores the meanings of subjects and spaces that are pursued. In particular, 『 The Road to Auraji』 inherits the ecological problem awareness shown in the early work of 「Meditation on the Snipe」 and is a work that attempts more fundamental insight and progresses with eco-feministic views. ‘Auraji’ in the work supports the socially weak and is a space that dreams of sustainable survival as commons that opposes social ecological crisis and a narrative space that anticipates the realization of an ecological welfare community that incarnates feminine principals. The two pieces of work, with clear portrayals of social conditions related to environmental problems of the 1970s and 1990s, include deep reflections of an authoritative society and violent human relationships. Also, they are pieces that see through the violence and exploitations of various horizons that occur due to modern dualistic eco-environmental ethics and male-focused patriarchal capitalism along with eco-feministic grounds that attempt to overcome these. 작가 김원일은 자신의 뿌리인 아버지 찾기와 어떻게든 살아나가기를 꾀하는 도생의 서사를 익히 보여준 바 있다. 작가는 중편 「도요새에 관한 명상」과 장편 『아우라지로 가는 길』에서 자연과 공생을 추구하는 인간에 대한 또 다른 도생의 서사를 보여준다. 본고에서는 생태학적 문제의식을 적극적으로 표명하고 사회적 현안에 대해 발언하는 공통점을 지닌 두 작품을 살펴보았다. 전례 없는 생태 위기에 처한 지금, ‘자연과의 관계’와 ‘사람들 사이의 관계’에 주목하는 에코페미니즘의 비전은 시사하는 바가 크다. 작가는 생태 위기 진단과 같은 환경 파괴에 대한 현실 고발에서 나아가, 궁극적으로 지향하는 대상 및 공간의 의미를 탐색해나간다. 특히 『아우라지로 가는 길』은 초기작 「도요새에 관한 명상」에서의 생태학적 문제의식을 계승하여 보다 근원적인 통찰을 시도하고 있는, 에코페미니즘적으로도 진전된 작품이다. 작품 속 ‘아우라지’는 사회적 약자를 부양하고 사회생태적 위기에 대항하는 커먼즈로서 지속가능한 생존을 꿈꾸는 공간이자, 여성적 원리를 구현하는 생태복지공동체의 실현이 기대되는 서사공간이다. 1970년대와 1990년대의 당대 환경 문제와 관련한 세태 묘사가 두드러진 두 작품은 권위적 사회와 폭력적 인간관계에 대한 깊이 있는 성찰이 담겨 있다. 또한 근대의 이원론적 세계관과 남성 중심의 가부장적 자본주의의 폭력과 착취에 주목하고 이를 극복하려는 에코페미니즘의 사유를 섬세하게 보여준다.

『山鴫』 論

金熙照 ( Kim Hee Jo ) 한국일본어교육학회 2021 日本語敎育 Vol.- No.98

“Ymsigi” is a released short story in a magazine in 1921 “Chuo Koron”. This work is based on an anecdote about mountain hunting between Tolstoy and Turgenev, Russian great writers of the nineteenth century. Turgenev and Tolstoy clashed over the trivial matter of hunting a mountain snipe. Turgenev claimed that he had shot down a mountain snipe even though there was no sign of the body he claimed to have shot down. On the other hand, Tolstoy, without caring about Turgenev's claim, denied it out of his mind and called it a lie. In addition, he ridiculed Turgenev, showed his “disapproval”, made “nasty remarks”, and turned his back on Turgenev and split. The two of them hadn't lost a step over a trivial mountain snipe. Through Turgenev and Tolstoy's refusal to concede, Akutagawa illuminates the egoism that lies deep within human beings.

SNIPE 초소형위성용 Iridium 통신 모듈의 가시성 분석

조동현(Dong-Hyun Cho),김홍래(Hongrae Kim),김해동(Hae-Dong Kim) 한국항공우주학회 2022 韓國航空宇宙學會誌 Vol.50 No.2

국내 초소형위성의 경우 개발 사례가 지속적으로 늘어나는 것에 비해 초기의 통신 성공률이 상대적으로 낮다. 이러한 상황에서 최근 상용 위성통신망을 활용한 저궤도 위성의 통신사례가 늘고 있으며, 이에 한국천문연구원, 한국항공우주연구원 및 연세대학교에서 개발하고 있는 SNIPE 프로젝트에서는 이리디움(Iridium) 모듈을 이용한 초소형위성의 통신링크를 시험하고자 한다. 이에 본 논문에서는 이리디움 위성군에 대한 궤도 및 통신환경과 SNIPE 위성의 이리디움 모듈 및 자세지향 모드를 고려한 이리디움 모듈의 가시성을 분석하였다. 저궤도 위성의 경우 높은 고도에 따른 상대적으로 적은 이리디움 통신 커버리지 및 이리디움 통신망에서 고려하고 있는 도플러 변화량에 비해 높은 변화량에 따른 통신 가능성이 제한되었다. 이러한 이유로 인해 이리디움 위성군과의 상대적인 승교점 적경각의 차이에 따라 좀 더 많은 성능 차이를 보이는 것을 확인해 볼 수 있었다. 마지막으로 초소형위성의 초기 사출시 발생되는 회전운동 상태에 대한 통신 모듈의 가시성 분석을 통해 해당 기술에 대한 활용 가능성을 분석해 보았다. Compared to the continuous increase of domestic nano-satellite development cases, the initial communication success rate is relatively low. In a situation where communication cases of LEO satellites using commercial satellite communication networks are increasing recently. In this situation, the SNIPE project developed by the KASI(Korea Astronomy and Space Science Institute), KARI(Korea Aerospace Research Institute), and Yonsei University apply an Iridium module for communication test to the SNIPE nano-satellites. Therefore, in this paper, the visibility analysis of the iridium module on the SNIPE satellite was analyzed under considering the orbital and communication environment of the iridium satellite constellation and the attitude control mode. In the case of LEO satellites, the communication possibility was limited due to the relatively small iridium communication coverage for high altitude and the high doppler shift considered in the iridium communication network. For this reason, in this paper, it could be simulated that there was a more performance difference according to the difference in relative RAAN(Right Ascension of Ascending Node) angle with the Iridium constellation. Finally, by checking the visibility of communication module under the tumbling situation that occurred during the initial deployment of the nano-satellite, the possibility of using the iridium communication technology was analyzed.

사이버불링 저격글에 대한 청소년교육의 대응방안 탐색 - 학교 밖 여자 청소년의 경험을 중심으로 -

오승희,권일남 미래를 여는 청소년학회 2020 미래청소년학회지 Vol.17 No.2

The purpose of this research is to investigate a countermeasure of Youth education through the extraction of topics and process of semantic formation in utilizing narrative research method to understand the life experiences and meanings of out-of-school female youth in way of contextual situation. Cyber bullying Sniping mention, which is the main theme of this research, is a specialized form of verbal attacking a certain person on the internet. Three person of out-of-school female youth who experienced Cyber bullying sniping mention is set up for an object of the study for investigate the appearance of this theme, and conducted in-depth interviews over six months using narrative research methods. The data collected through the interview were analyzed in the areas of technical surface search and in-depth search, and the results are as follows. First, Cyber bullying Sniping mention is characterized by a complex aspect that encompasses bullying, language violence, and cyber bullying. Second, the process of reinterpretation to overcome the Cyber bullying Sniping Mention appeared as a process of self-consciousness growth and objectification of self. Third, The process of adaptation to overcome the Cyber bullying experience has expanded to the social aspects of designing each of their own future and forming new relationships. The implications of this study are as follows: First, it is necessary to educate the youth based on the point of view that Cyber bullying Sniping mention contain violent elements rather than simple deviant behavior. Second, in order to solve the damage of Cyber bullying Sniping mention, integrated support needs to be presented such as cognitive-behavioral therapy in the adaptation process of victim Youths. Third, Parent education is very important in relation to family factors. 본 연구의 목적은 사이버불링 저격글을 경험한 학교 밖 여자 청소년들의 삶의 경험과 의미를 상황적 맥락으로 이해하고자 내러티브 연구방법을 활용하여 주제의 추출 및 의미형성과정을 통해 청소년교육의 대응방안을 탐색해 보는 데 있다. 본 연구의 주제인 사이버불링 저격글은 인터넷상에서 특정인을 언어적으로 공격하는 사이버불링의 특유한 형태에 해당한다. 이 주제의 양상을 심층적으로 탐색하기 위하여 사이버불링 저격글을 경험한 학교 밖 여자 청소년 3명을 연구 대상으로 설정하였고, 그들을 대상으로 6개월에 걸친 심층 인터뷰를 진행하였다. 인터뷰를 통해 수집된 자료는 기술적 표층 탐색과, 심층 탐색의 영역으로 분석하였으며 결과는 다음과 같다. 첫째, 사이버불링 저격글은 집단 따돌림․언어폭력․사이버불링을 포괄하는 복합적 양상으로 전개되는 특성이 있다. 둘째, 사이버불링 저격글을 극복하려는 재해석의 과정은 자기 자신에 대한 자의식의 성장과 자신에 대한 객관화 과정으로 나타났다. 셋째, 사이버불링 경험을 벗어나기 위한 적응의 과정은 자신의 미래를 설계하고 새로운 관계를 형성하는 사회적 측면으로 확대되는 형태를 보였다. 본 연구의 결과로 나타난 함의는 다음과 같다. 첫째, 사이버불링 저격글이 단순한 일탈 행동이 아닌 폭력적 요소를 담고 있다는 관점 전환에 기초한 청소년교육이 필요하다. 둘째, 사이버불링 저격글 피해를 해소하기 위해서는 피해 청소년의 적응과정에 나타난 인지-행동 치료와 같은 복합적 지원이 제시 돼야 한다. 셋째, 가정 요인과 관련하여 부모교육이 매우 중요하다.

Nanosat Formation Flying Design for SNIPE Mission

Kang, Seokju,Song, Youngbum,Park, Sang-Young The Korean Space Science Society 2020 Journal of Astronomy and Space Sciences Vol.37 No.1

This study designs and analyzes satellite formation flying concepts for the Small scale magNetospheric and Ionospheric Plasma Experiments (SNIPE) mission, that will observe the near-Earth space environment using four nanosats. To meet the requirements to achieve the scientific objectives of the SNIPE mission, three formation flying concepts are analyzed: a cross-shape formation, a square-shape formation, and a cross-track formation. Of the three formation flying scenarios, the cross-track formation scenario is selected as the final scenario for the SNIPE mission. The result of this study suggests a relative orbit control scenario for formation maintenance and reconfiguration, and the initial relative orbits of the four nanosats meeting the formation requirements and thrust limitations of the SNIPE mission. The formation flying scenario is validated by calculating the accumulated total thrust required for the four nanosats. If the cross-track formation scenario presented in this study is applied to the SNIPE mission, it is expected that the mission will be successfully accomplished.

Limitations of Electromagnetic Ion Cyclotron Wave Observations in Low Earth Orbit

황정아,김향표,박재흥,이재진 한국우주과학회 2018 Journal of Astronomy and Space Sciences Vol.35 No.1

Pc1 pulsations are geomagnetic fluctuations in the frequency range of 0.2 to 5 Hz. There have been several observations of Pc1 pulsations in low earth orbit by MAGSAT, DE-2, Viking, Freja, CHAMP, and SWARM satellites. However, there has been a clear limitation in resolving the spatial and temporal variations of the pulsation by using a single-point observation by a single satellite. To overcome such limitations of previous observations, a new space mission was recently initiated, using the concept of multi-satellites, named the Small scale magNetospheric and Ionospheric Plasma Experiments (SNIPE). The SNIPE mission consists of four nanosatellites (~10 kg), which will be launched into a polar orbit at an altitude of 600 km (TBD) in 2020. Four satellites will be deployed in orbit, and the distances between each satellite will be controlled from 10 to 1,000 km by a highend formation-flying algorithm. One of the possible science targets of the SNIPE mission is observing electromagnetic ion cyclotron (EMIC) waves. In this paper, we report on examples of observations, showing the limitations of previous EMIC observations in low earth orbit, and suggest possibilities to overcome those limitations through a new mission.

Electron Microbursts 관측을 위한 SNIPE 위성의 지자기장 지향 제어기

조동현(Dong-Hyun Cho) 한국항공우주학회 2017 한국항공우주학회 학술발표회 논문집 Vol.2017 No.4