• Korean Journal of Environmental Biology
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• v.40 no.4
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• pp.591-603
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• 2022

This study was conducted to identify changes of insect compositions and diversity after construction of an onshore wind farm. We investigated insect fauna and compositions between a grassland deforested by the construction and a forest located at Yeongdeok and Yeongyang, Gyeongsangbuk-do, Korea. Insects were collected using a sweeping net and light trap. A total of 11 orders, 50 families, and 246 species, and 1,076 individuals were collected at study sites. By taxonomic group, Lepidoptera species were the most frequently found with 141 species, 417 individuals (38.8%), followed by Hymenoptera (20.6%), Hemiptera (16.2%), and Orthoptera (12.3%). There were also significant differences in insect species and community compositions between sites. Creating open-field deforested forests are beneficial for some insect groups such as Hymenoptera and Orthoptera. Our results suggest that deforesting by the construction of an onshore wind farm might affect the composition and diversity of insects. Results of this study provide basic data for research on onshore wind farms.

• Journal of Marine Life Science
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• v.2 no.2
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• pp.56-61
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• 2017

This study examined the environmental characteristics of shore pollution sources in the southern part of the Sinan, Jangsando area in the West Coast of Korea. A shoreline survey of the watershed was conducted to identify the pollution sources and measure the water discharge rate and microbial hygiene of water and finally estimate the possible impact area of pollution. Forty five of pollution sources in total were identified and they were grouped into sewage (33), agriculture waste water (1) and waste water from inland fish farm (11). Nine among them were discharged into the seawater and discharge volume was 72,857~281,250 l/min. Fecal coliforms of St. 72 (sewage) and St. 74 (shrimp farm) were 490 MPN/100 ml and 49 MPN/100 ml and the impact zones of the pollution were 4,389 m and 1,900 m respectively.

• Journal of the Korean Society of Marine Environment & Safety
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• v.28 no.6
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• pp.937-945
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• 2022

Maritime autonomous surface ships (MASS) have a high degree of autonomy and operate autonomously along a planned route. However, when necessary, the shore remote control center(SRCC) can directly intervene in ship operations. In this paper, the operation concept of the simulator system, which can be used to educate and train shore remote control officers, responsible for monitoring the operation of autonomous ships on land and remotely controlling them in case of an emergency, is reviewed. The required functions of the simulator system that enables the operation concept are also reviewed. The major parts of the SRCC simulator system are the monitoring station and control station, which simulate the functions of monitoring the operation status of multiple MASS and the functions of the remote operation of MASS in the case of emergency, respectively. Various units to simulate the operation of MASS and traf ic ships and various objects around the MASS are included in the simulator system. The instructor operation station is the central part of the simulator system that integrates and controls the unit systems. Functionally, as conditions under which SRCC is allowed to remotely intervene in the operation of MASS, the emergency situation for remote control (ESRC) has been defined. Moreover, the required functions to cope with these ESRC conditions have been included in the simulator system requirements.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1999.05a
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• pp.213-217
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• 1999

This paper describes a methodology of database synchronization between ship and land. Through this synchronization, consistency can be maintained between land's database and ship's database. Onboard useful data is sent from ship's database to land' database at time interval via the INMARSAT-C which satisfies with the GMDSS requirements and supports transport service. eased on the result of the paper, user can access land's database which is synchronized with ship's database.

• Korea Trade Review
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• v.43 no.6
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• pp.93-112
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• 2018

Lately, various nations including the U.S. and China aim to decrease air pollutants in port areas. As the number of vessels as ports increases, the volume of cargo and air pollutants emitted from vessels are also increasing. Therefore, the social responsibility of port construction, shipping companies and terminal operators is becoming important. Alternate Maritime Power(AMP) is an anti-pollution measure which helps in reducing air pollution generated from diesel generators by using shore electric power. This study compares the AMP tariff and Bunk Fuel tariff at berth in order to determine how to operate an efficient offshore power supply facility in Gwangyang Port.

• The Korean Journal of Malacology
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• v.30 no.3
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• pp.235-242
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• 2014

This study was conduct to investigate the effect of Intermediate culture types on the growth and survival rate of the abalone, Haliotis discus hannai, in net cage and indoor tank. Intermediate cultures were to determine there that was to setting at marine net cage culture (NCC) in net cage, floor culture (FC), net floor culture (NFC), double shelter culture (DSC) and indoor net cage culture (INCC) in indoor tank, in two replicate. In the growth performance of juvenile abalone reared through intermediate culture, that the absolute growth rate ($AGR_{SL}$, $AGR_{SB}$), daily growth rate ($DGR_{SL}$, $DGR_{SB}$), and specific growth rate ($SGR_{SL}$, $SGR_{SB}$) to the shell length $(_{SL})$ and shell breadth $(_{SB})$ of NCC were higher than those of different groups (P < 0.05). As weight gain (WG), daily weight gain (DWG) and specific weight gain (SWG) to body weight through intermediate culture types in indoor tank was not significant. Also that, survival rate among experimental groups of intermediate culture in indoor tank was not significant. Therefore, these results is showed that should to cultivate for net cage so that intermediate culture of juvenile abalone over 2 cm, accordingly research to effective progress of juvenile abalone intermediate culture in indoor tank be should from various reason as well as feed and rearing condition.

• Electronics and Telecommunications Trends
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• v.10 no.3 s.37
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• pp.125-131
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• 1995

공중육상이동통신망(PLMN)은 계속적으로 발전중에 있는 통신분야이다. 현재 다른 데이터 통신망의 추세를 비추어 볼 때, 이러한 공중육상이동통신망은 기존의 고정형 통신망인 공중교환전화망(PSTN)과 도입관계에 있는 종합정보 통신망(ISDN)과 연동이 필수적이라고 하겠다. 현재 데이터망과의 연동에 대한 개정작업은 진행중에 있다. 이러한 추세에 맞추어 새로운 서비스의 망간접속에 대한 연구가 필요하며 그에 따른 상호 접속 공정 경쟁의 국내 현황과 사업자간 협정을 분석하였다. 이 결과는 추후 망간연동에 대한 표준(안) 및 기준(안)을 작성하는데 기초자료로 사용할 계획이다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1998.11a
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• pp.263-268
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• 1998

원격 이동체 위치를 전송하기 위해서는, 고출력 송수신국을 갖는 무선 데이터 전용 통신 장치가 필요하다. 이 연구에서는, 국내에 이미 광범위하게 설치된 PCS(Personal Communications Services) 네트워크를 이용하여 원격 이동체의 CPS 위치 데이터를 육상에서 해상으로 또는, 해상에서 육상으로 전송하기 위한 시스템을 구축하였다. 구축한 시스템을 이용하여, 육상에서 자동차와, 해상에서 모터 보트의 GPS 데이터를 전송 실험한 결과, PCS 서비스 구역 내에서 정확한 데이터 송수신이 가능함을 나타내었다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.116-118
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• 2020

자율운항선박의 성공적인 운항을 위해 항계 및 협수로 내에서의 안정적 육상 지원 서비스가 매우 중요한 역할을 한다. 본 발표에서는 자율운항선박 안전운항 지원을 위한 육상 6종 서비스의 기술 개요에 대해 설명하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.50-51
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• 2020

자율운항제어를 위한 육상-선박 간 통신망에 대하여 원활한 네트워크 환경 구성 및 효율적인 통신망 운영 솔루션이 중요한 요소로 작용한다. 이에 네트워크 관리 프로토콜인 SNMP를 분석하고, SNMP 기반의 네트워크 모니터링 S/W를 개발하여 자율운항선박과 육상간 정보교환의 안정성을 확보한다.