국립공원 3개 저수지에 서식하는 생태계교란 어종의 서식양상과 먹이생물, 어류상에 미치는 영향

박승철 ( Seung-chul Park ),이광열 ( Kwang Yeol Lee ),최광식 ( Kwang-seek Choi ),한미숙 ( Mee-sook Han ),고명훈 ( Myeong-hun Ko ) 한국어류학회 2021 韓國魚類學會誌 Vol.33 No.2

본 연구는 국립공원 내 생태계교란 어종 배스와 블루길의 도입에 따른 영향을 파악하기 위해 2020년 금계지, 삼가지, 내장지에서 조사를 실시하였다. 금계지에서는 7과 11종 1,221개체가 채집되었고, 배스는 우점종 (96.3%), 블루길은 소수 (0.3%) 서식하고 있었고, 배스는 주로 밀어 (IRI, 37.2%)와 잠자리목(25.6%), 뱀잠자리목 (11.6%), 배스 (7.0%) 등을 섭식하였다. 삼가지에서는 5과 10종 854개체가 채집되었고, 배스는 우점종(60.8%)으로 주로 새우류 (33.6%)와 잠자리목 (34.4%), 밀어(21.2%), 피라미 (6.1%) 등을 섭식하였다. 내장지에서는 7과 13종 1,075개체가 채집되었고, 블루길은 우점종 (38.1%), 배스는 우세종 (9.5%)으로 나타났으며, 블루길은 주로 물벼룩류 (IRI, 77.5%)와 파리목 (9.8%), 새우류 (4.0%) 등을 섭식하였고 배스는 주로 밀어 (73.3%)와 새우류 (21.2%) 등을 섭식하였다. 금계지와 삼가지의 배스는 10여 년 전에 도입된 것으로 추정되고, 도입 이후 대부분의 어류는 개체수가 급격히 감소하였다. 내장지의 블루길은 20여 년 전에 도입된 것으로 추정되며, 도입 이후 상대풍부도가 점점 증가하여 40%대에 도달하였고, 배스는 5~6년 전에 도입되었고 도입 이후 자생 어류의 종수와 개체수가 급격히 감소하였다. 마지막으로 국립공원 내 배스와 블루길의 서식현황 및 관리방안에 대해서 논의하였다. This study was conducted to elucidate the impact of invasive species, Micropterus salmoides and Lepomis macrochirus in Geumgyeji, Samgaji and Naejangji reservoirs of National Parks, Korea in 2020. In the Geumgyeji, 1,221 individuals of 11 species in 7 families were collected including M. salmoides (relative abundance, 96.3%) and L. macrochirus (0.3%), M. salmoides fed mainly on Rhinogobius brunneus (IRI, 37.2%), Odonata (25.6%), Megaloptera (11.6%), and M. salmoides (7.0%). In the results of Samgaji showed that 854 individuals of 10 species in 5 families were collected including M. salmoides (60.8%), and M. salmoides fed mainly on Decapoda (shrimp, 33.6%), Odonata (34.4%), R. brunneus (21.2%), and Zacco platypus (6.1%). In the Naejangji showed that 1,075 individuals of 13 species belonging to 7 families were collected including L. macrochirus (38.1%) and M. salmoides (9.5%), and L. macrochirus fed mainly on Branchiopoda (77.5%), Diptera (9.8%), Decapoda (4.0%) and M. salmoides fed mainly on R. brunneus (73.3%), Decapoda (21.2%). M. salmoides of Geumgyeji and Samgaji were apparently introduced more than a 10 years ago. The fish population declined rapidly since the introduction of M. salmoides. L. macrochirus of Naejangji was introduced more than 20 years ago, which increased its relative abundance to 40%. M. salmoides was introduced five to six years ago, and the fish species and population declined rapidly since the introduction of M. salmoides. Finally, we discussed the inhabitat status and management of M. salmoides and L. macrochirus in the National Park.

북한산국립공원의 계류수질 보전 전략(I)

박재현,우보명,김우룡,안현철,조현서,추갑철,김춘식,최형태,Park, Jae-Hyeon,Woo, Bo-Myeong,Kim, Oue-Ryong,Ahn, Hyun-Chul,Cho, Hyun-Seo,Choo, Gab-Chul,Kim, Choon-Sig,Choi, Hyung-Tae 한국환경복원기술학회 2001 한국환경복원기술학회지 Vol.4 No.3

This study was conducted to investigate physicochemical property changes from July 1998 to August 2001 in Mt. Bukhansan National Park. Four water sampling points were selected to measure the quality of stream water in the northeastern part of the Mt. Bukhansan National Park. The results were summarized as follows; In spring, the average pH of stream water was below the first class of the river water quality standard, while it was normal level in summer. The average electrical conductivity was about 2.3~3.3 times higher in downstream water than in upstream water during spring and summer. The contents of anions($Cl^-$, $NO{_3}^-$, $SO{_4}^{2-}$) were about 1.1~7.4 and 0.4~11.4 times higher in downstream than in upstream water, respectively. These results indicate that water quality was poorer in downstream than in upstream water. We suggest that stream water in the Mt. Bukhansan National Park should be protected from impacts of snow melting mineral particles in spring season and human impacts like wastewater of point source in summer season.

A Design and Implementation of Educational Delivery Robots for Learning of Autonomous Driving

Hur, Hwa-La,Park, Myeong-Chul 한국컴퓨터정보학회 2022 韓國컴퓨터情報學會論文誌 Vol.27 No.11

In this paper, proposes a delivery robot that can be autonomous driving learning. The proposed robot is designed to be used in park-type apartments without ground parking facilities. Compared to the existing apartments with complex ground and underground routes, park-type apartments have a standardized movement path, allowing the robot to run stably, making it suitable for students' initial education environment. The delivery robot is configured to enable delivery of parcels through machine learning technology for route learning and autonomous driving using cameras and LiDAR sensors. In addition, the control MCU was designed by separating it into three parts to enable learning by level, and it was confirmed that it can be used as a delivery robot for learning through operation tests such as autonomous driving and obstacle recognition. In the future, we plan to develop it into an educational delivery robot for various delivery services by linking with the precision indoor location information recognition technology and the public technology platform of the apartment.

구강내 접근방식에 의한 하악골절의 정복술

박병윤,이영호,이명철 大韓成形外科學會 1987 Archives of Plastic Surgery Vol.14 No.1

There are two approach methods in reduction of mandibular fracture, one is external approach and the other is intraoral approach. Most surgeon have been used external approach but intraoral approach gives many benefits. The authors performed interosseous fixation of various sites of 10 cases of mandibular fracture through intraoral approach and concluded that advantages of this method are; 1. no external scar 2. complete reduction (alignment) 3. decreased rate of malunion, maloclusion 4. fewer possibility of facial nerve injury 5. shorter operation time.

네트워크 통신 보안을 위한 암호화 조건부 접속시스템

박남철,이철형,최명수,김경호,이성로 木浦大學校 應用科學硏究院 2001 應用科學硏究誌 Vol.1 No.-

We can improve encryption speed at the home networking which transmit high density information. In this paper, We applicate DES encryption algorithm in the proposed encryption chip which dose operation that encrypts with block of 64 bits. And we improved key problems about transmitting external key by the conditional contact algorithm which solves the problem about periodical refresh in the symmetric algorithm with public key structure.

스마트 안테나에서 블라인드 기법을 이용한 Two Dimensional RAKE 수신기

박형준,이철형,최명수,김경호,이성로 木浦大學校 應用科學硏究院 2001 應用科學硏究誌 Vol.1 No.-

Smart antennas technique is the scheme that focuses the signal on the desired user using array antennas. Therefore, the scheme can dramatically improve performances in conventional mobile communication systems. The scheme is the newest technique for beamforming. Its specific function combines antenna arrays with digital signal processing techniques that can control signal direction. Now, the scheme is known as the future generation core technique in communication provider communities. In this paper, we propose two dimensional rake receiver based on blind schemes in smart antennas and then compare the performance of the proposed scheme with that of the conventional scheme. Computer simulation results show that the proposed scheme outperforms the conventional scheme.

다차원 신호모형 해석을 통한 DOA 추정기법

박남철,최명수,박형준,김경호,이성로 목포대학교 정보산업연구소 2000 情報産業硏究誌 Vol.8 No.-

The Location-Informing service is based on the GPS data from the satellite. Until now, the service has been free. However, it may become charged. Therefore, we research the methods that can find the location-information using the antennas in future mobile communication systems and investigate the signal arrival direction estimation methods with considering practical environments.

4세대 이동 멀티미디어 시스템의 연구동향 분석

최명수,박형준,박남철,김경호,이성로 목포대학교 정보산업연구소 2000 情報産業硏究誌 Vol.8 No.-

In this paper, we first define 4th-generation multimedia systems that play an important role in 21C information society. Nest, we investigate and analyze the international trend of the related research and then predict the evolutionary model for 155Mbps wireless mobile multimedia systems.

위성 ATM망에 적합한 응용서비스 모형 개발

최명수,박남철,박형준,김경호,이성로 목포대학교 정보산업연구소 2000 情報産業硏究誌 Vol.8 No.-

The use of the Internet is much increased and the multimedia data such as voice and image should be processed in the Internet. The required characteristics of the communication networks for the 21-st century Internet are the fusion between communications and broadcasting, high speed, large capacity, high intelligence, and personalization. In realizing the characteristics mentioned above, the ATM is the only technique that can practically guarantee QoS and is the core technique in super high-speed service networks. In this paper, we will investigate the international study of the high-speed the satellite communication and then research plans for developing and providing optimum application services.

임베디드 소프트웨어 디버깅을 위한 추적도구의 설계 및 구현

심갑식,박명철,신현갑 진주산업대학교 산업과학기술연구소 2007 산업과학기술연구소보 Vol.- No.14

In order to develop SoC program for embedded systems, a tool that can remotely debug from host system is needed. Because the existing remote debugging systems using GDB don't offer information on the SoC program execution in real-time, it is difficult to observe the condition of the program execution, and also they have the limited characteristics to tools and use costly adaptors. In this paper, a real-time tracking tool that can record SoC status on the execution of the assigned instructions is introduced and an economical USB-JTAG adaptor is proposed. And we show that this tool can track the execution of a composed program in the target system based on PXA255 processor.