다도해해상국립공원 흑산도 검은이마직박구리(Pycnonotus sinensis) 개체수 변화 및 국내 서식 현황

박종현(Jong-Hyun Park), 서슬기(Seul-Gi Seo), 조숙영(Sook-Young Cho), 박창욱(Chang-Uk Park), 박세영(Se-Young Park), 이승연(Seung-Yeon Lee), 김양모(Yang-Mo Kim), 권영수(Young-Soo Kwon) 국립공원연구원 2014 국립공원연구지 Vol.5 No.3

This study was conducted to survey distribution in Korea and fluctuation of individuals of the Light-Vented Bulbul Pycnonotus sinensis in Heuksan-do (Is.), Dadohaehaesang National Park. Since there were the first recorded on Eocheong-do (Is.) in Jeonbuk province in 2002, Light-Vented Bulbuls were observed on Socheong-do (Is.) in Incheon, Hatae-do (Is.) and Hong-do (Is.) in Jeonnam province located in south-western part of Korea until 2006. They distributed to Heuksan-do (Is.) in Jeonnam province and Jeju-do (Is.) and Taejongdae in Busan, Changwon in Gyeongnam province, Suncheon in Jeonnam province among 2007~2010. They additionally distributed to Paju in Gyeonggi province and Pohang in Gyungbuk province after 2010. We monitored Jin-ri and baenanggimi in Heuksan-do (Is.) daily among 2011~2013. We observed only 3 individuals in July 2011. But Light-Vented Bulbuls have been observed all the year round since 2012 and the number of individuals is increasing. We observed 12 individuals in July 2012 and 31 individuals in 2013. The Heuksan-do (Is.) in Dadohaehaesang National Park has been used a stopover-site by migratory birds. Because the Light-Vented bulbul is a species of newly settled in Heuksan-do (Is.), it is possible to affect on migratory birds. Therefore to make conservation plan for migratory birds, It needs to monitoring population consistently and effect of Light-Vented Bulbul on migratory birds.

계층적 은닉 마코프 모델을 이용한 비디오 시퀀스의 셧 경계 검출

박종현,조완현,박순영,Park, Jong-Hyun,Cho, Wan-Hyun,Park, Soon-Young 한국통신학회 2002 한국통신학회논문지 Vol.27 No.8A

In this paper, we present a histogram and moment-based vidoe scencd change detection technique using hierarchical Hidden Markov Models(HMMs). The proposed method extracts histograms from a low-frequency subband and moments of edge components from high-frequency subbands of wavelet transformed images. Then each HMM is trained by using histogram difference and directional moment difference, respectively, extracted from manually labeled video. The video segmentation process consists of two steps. A histogram-based HMM is first used to segment the input video sequence into three categories: shot, cut, gradual scene changes. In the second stage, a moment-based HMM is used to further segment the gradual changes into a fade and a dissolve. The experimental results show that the proposed technique is more effective in partitioning video frames than the previous threshold-based methods.

Distribution of the Fairy Pitta (Pitta nympha) in the South Korea: A focus on protected areas

Gil-Pyo Hong(홍길표),Jae-Hoon Kim(김재훈),Seul-Gi Seo(서슬기),So-Yeon Cho(조소연),Bo-Yeon Hwang(황보연),Jong-Hyun Park(박종현),Seung-Yeon Lee(이승연),Ga-Young Kim(김가영),Wan-Hee Nam(남완희),Ha-Cheol Sung(성하철) 한국조류학회 2021 한국조류학회지 Vol.28 No.2

국내 팔색조(Pitta nympha) 분포 현황을 알아보고자 전국 국립공원 등 보호지역 중심으로 총 19개 지역을 조사하였고, 전문가 네트워크를 통해 자료를 보강하였다. 전국 19개 지역을 조사한 결과 북한산, 지리산 등 내륙지역 7개 국립공원에서는 팔색조가 확인되지 않았고, 경남 거제, 남해, 해남, 장흥 고흥 등 남해안과 인접한 12개 지역에서 팔색조 서식이 확인되었다. 또한 전문가 네트워크를 통해 수집한 팔색조 출현 위치 정보 82건을 분석한 결과, 전국 8개 광역지자체 모두 팔색조 서식이 확인되었고, 내륙지역(26.8%)보다 해안지역(73.2%)에서 더 많이 출현하였다. 연구 결과를 종합해보면, 우리나라의 팔색조는 주로 제주도와 남해안 지역을 중심으로 많이 분포하며, 그 보다 적은 개체수가 내륙 지역에 넓게 분포하고 있는 것으로 나타났다. The present study investigated the current distribution of Fairy Pitta (Pitta nympha) in South Korea. A total of 19 study areas, including protected areas such as national and provincial parks in South Korea were surveyed, and additional data obtained from an expert network. According to the results, Fairy Pitta was absent in seven inland national parks, including Mt. Bukhan and Chiri parks. Fairy Pitta inhabited 12 areas near the southern coast of South Korea, including Geoje, Namhae, Haenam, Jangheung, Goheung, and Gyeongnam Province. The analysis results of 82 datasets obtained from experts with regard to the locations where Fairy Pitta have been spotted showed that the bird inhabits all the eight metropolitan regions in South Korea, and is more frequently spotted in coastal areas (73.2%) than in inland areas (26.8%). The findings demonstrate that Fairy Pitta is mainly distributed in Jeju Island and the southern coast of South Korea, and is distributed in inland areas at relatively lower numbers.

ITO/CNT 나노 복합체의 염료감응형 태양전지의 이용

박종현,정현준,조태연,윤순길,Park, Jong-Hyun,Pammi, S.V.N,Jung, Hyun-June,Cho, Tae-Yeon,Yoon, Soon-Gil 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.1

The ITO/Cabon Nano Tube (CNT) nano composites were deposited by nano cluster deposition (ITO) and arc discharge deposition (CNT) on glass substrates. The structural, optical and photovoltaic performance of ITO/CNT nano composites as a counter electrode of dye-sensitized solar-cells (DSSCs) such films were investigated. At low temperature below $250^{\circ}C$, the ITO films deposited on CNT. The ITO/CNT nano composit showed a good optical and electrical property for the counter electrode of DSSCs. When the as-prepared ITO/CNT nano composites are used for the counter electrodes, the photovoltaic parameters are $V_{OC}$ = 0.69 V, $J_{SC}$ = 5.69 mA/$cm^2$, FF = 0.32, and $\eta$ = 0.53 %. The ITO/CNT nano composites showed the possibility for the counter electrode applications of DSSCs.

관광지 교육을 위한 교육용 챗봇 큐레이터

박종현,김임여름,류기환,Park, Jong-hyun,Kim, Im-yeoreum,Ryu, Gi-Hwan 국제문화기술진흥원 2022 문화기술의 융합 Vol.8 No.6

A chatbot is a responsive chatting program that can communicate with people through text or voice. 'Siri' and 'Bixby' installed in smartphones are also representative artificial intelligences that use the chatbot system. With the rapid development of chatbots, users in various fields have also begun to pay attention to the food service industry. As machine learning technology developed, it became possible to use more flexible conversations, and it soon expanded to the realm of education. Userㄴs interact through conversations with chatbots, and active interactions stimulate users' desires and at the same time have a positive effect on learning motivation. Recommendation system programs using chatbots not only recommend products according to users' preferences, but also provide various additional information. This study planned a program that combined the chatbot system and tourism service. The chatbot curator will develop into a form of inducing interest and curiosity to users through learning, and then facilitating the desire for tourism. The purpose of this study is to lay the foundation for a chatbot curator based on previous studies.

USN를 이용한 컨테이너 트레일러 위치추적 시스템

박종현,추영열,Park, Jong-Hyun,Choo, Young-Yeol 한국정보통신학회 2007 한국정보통신학회논문지 Vol.11 No.3

This paper describes position tracking system of a container trailer approaching to a gantry crane for loading or unloading a container into or from a ship, respectively. Proposed position tracking system informs the trailer driver of right position to stop the car under a gantry crane. To measure the location of a trailer, we used Cricket Mote modules which adopted RF and ultrasound technology. We present an elaborate method to improve position errors occurring at sensing and calculate three dimensional position by triangulation along with how to reduce location tracking interval for real-time monitoring. The location information was transmitted to a Personal Digital Assistant (PDA) periodically through Bluetooth communication for guidance of the trailer driver. In indoor and outdoor tests, position errors were less than 3 cm and location tracking interval was 0.5 second on average. 이 논문은 선적 및 하역 작업을 위해 겐추리 크레인으로 들어오는 컨테이너 트레일러의 위치 추적 시스템에 대하여 기술한다. 위치 추적 시스템은 트레일러가 겐추리 크레인에 접근하였을 때 트레일러의 정지 지점을 운전자에게 알려준다. 위치 측정 센서는 RF 신호와 초음파 방식을 채택한 크리켓 mote 모듈을 사용하였다. 실시간 전송을 위해 위치 측정 주기를 단축하였으며 삼각측량 방법에 따른 3 차원 위치 계산식과 환경적 요인에 의한 거리 측정 오류 감소 방법을 제시하였다. 측정된 위치는 블루투스 통신을 통해 주기적으로 운전자 앞의 PDA (Personal Digital Assistant)에 전송된다. 실내외 테스트 결과 위치 오류는 3 cm 이내로 개선되었으며 위치 측정 표시 주기는 평균 0.5초였다.

고속전철용 탄소 - 탄소 복합재 브레이크 기술동향

박종현,김광수 ( Jong Hyun Park,Kwang Soo Kim ) 대한금속재료학회 1998 大韓金屬學會會報 Vol.11 No.2

도시성장에 따른 공간구조의 변화에 관한 연구 -의정부시의 사례를 중심으로

박종현,권영,이종렬,Park, Jong-Hyun,Kweon, Young,Lee, Jong-Ruyl 한국디지털건축·인테리어학회 2004 한국디지털건축인테리어학회 논문집 Vol.4 No.2

Transformations of the urban spatial structure, from sub-area redevelopment to newtown development, results great influences upon existing urban condition and spatial configuration. The purpose of the study is to analyse the effect of the urban spatial configuration of Uijongbu city where experienced changes after newly development of city center and new residential area. The west part of the city where is limited in growth by military bases, ego U.S Army basecamp, were planned and established as the other axis of the city center since mid 1980's. After that new residential area which is located in far east of the city were also developed. Space syntax as a methodology has been adopted to conduct quantitative analysis which is able to interpret differences between sub-areas ; old city center, new city center, new residential area. The results of the analysis are follows ; 1) existing structure of the urban fabric, especially old city center, is sustained and intensified, 2) new city center which is west part of the city has failed to achieve organic spatial connection adjacent to old city center, 3) there is less spatial depecdency relationship between city center and new residential area where is identified as another small self-support city within the city.

유색미 도입 유전자원의 생육 및 품질특성 변이 다변량 분석

박종현,이지윤,전재범,유오종,손은호,Park, Jong-Hyun,Lee, Ji-Yoon,Chun, Jae-Buhm,You, Oh-Jong,Son, Eun-Ho 한국작물학회 2018 한국작물학회지 Vol.63 No.3

우리나라에 도입된 유색미 유전자원 178점의 생육 및 품질특성 변이를 평가하고 주성분 분석을 통해 유전자원을 분류하여 벼 육종의 기초자료로 활용하고자 연구를 수행하였다. 1. 도입 유색미 유전자원 178점의 변이계수는 이삭길이, 단백질 함량이 가장 높았고, 장폭비, 천립중, 간장, 아밀로스 함량 순으로 높았고, 수량구성요소인 주당수수가 가장 낮았다. 2. 유색미 유전자원의 생육 및 품질특성에 대한 주성분 분석 결과, 각 주성분의 고유값과 기여율은 제1주성분 2.06개, 29.49%, 제2주성분 1.31개, 18.75%, 제3주성분 1.21개, 17.36% 및 제4주성분 1.01개, 14.38%로 4개의 주성분 고유값이 1 이상이며, 누적기여율이 79.98%로 도입 유색미 유전자원 평가가 가능하였다. 3. 군집분석 결과, I군집은 79자원이 포함되었으며, II, III, IV, V, VI, VII군집은 각각 46자원, 19자원, 13자원, 4자원, 8자원 및 9자원이 분포하였다. I군집, II군집에는 짙은갈색의 자원이 많이 분포되었고, V군집, VI군집, VII군집에는 자색 계열의 종피색을 가진 자원이 많았다. 특히, V군집은 암자색과 자색만으로 자색계열의 종피색을 가진 자원만이 포함되어 있다. VII군집에서 간장, 이삭길이, 장폭비가 다른 군집에 비해 평균값이 적었으며, V군집에서는 천립중 평균이 다른 군집에 비해 가장 낮았다. IV군집에서는 평균 주당수수 가장 낮았으나, 천립중 평균은 가장 높게 나타났다.

시간 지연을 갖는 페이딩 채널의 전력 지연 분포 특성 분석 및 활용

박종현,김재원,송의석,성원진,Park, Jong-Hyun,Kim, Jae-Won,Song, Eui-Seok,Sung, Won-Jin 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.8c

Applying an appropriate received signal processing algorithm based on the channel characteristics is important to improve the receiver performance. Wireless channels in general exhibit various time-delay characteristics depending on their power delay profile. When the estimated channel power summation is used to determine the amount of time delay, a channel adaptive receiver structure can be implemented. In this paper, we derive a closed-form expression for the error probability of the channel classification when the estimated channel power summation is used to classify channel groups having different time delay characteristics, and present the performance gain utilizing multiple estimation results. 통신 수신기 구현에 있어 채널의 특성을 파악하여 그에 적합한 수신 신호 처리를 수행하는 것은 수신 성능 향상을 위해 매우 중요하다. 무선 채널은 전력 지연 분포(power delay profile)에 따라 다양한 시간 지연 특성을 가지며, 추정된 채널의 전력 합산을 통해 시간 지연 정도를 판별 시, 채널 적응적인 수신 구조 구현이 가능하다. 본 논문에서는 전력 지연 분포의 합산을 통해 시간 지연의 상대적인 크기에 따른 채널 군으로 분류하는 경우에 있어 채널 판별 오류 확률을 closed-form 수식으로 유도하고, 다수 번의 추정 결과를 누적하여 활용 시 얻어지는 성능 이득을 제시한다.