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State-of-the-art IVEF Service based on e-Navigation System
Oyunchimeg, Bayarmaa,Jeong, Jung Sik,Park, Gyei-Kark Korean Institute of Intelligent Systems 2013 한국지능시스템학회논문지 Vol.23 No.6
In this paper, the state-of-the-art IVEF Service based on e-Navigation System was represented. The unification of the data exchange format among maritime-related systems is one of vital user-needs of e-Navigation, advantageous in bringing maritime safety and security. This paper propose the method to exchange marine information in IVEF, as recommended by the IALA, between VTS centers and Korea's GICOMS as well as the government-related agencies. To achieve this, a system data flow was designed which it acts as client and server. It enables the sending and receiving of Radar and CCTV images in accordance with the IVEF recommendation document of IALA.
Bayarmaa Oyunchimeg,김갑기 한국정보기술학회 2013 JOURNAL OF ADVANCED INFORMATION TECHNOLOGY AND CON Vol.3 No.1
In this paper is proposed to design mobile handset antenna for make mobile handset more compact and thin. This antenna has an advantage of performing different frequency bands by one antenna design. For this purpose, a varactor diode is used in antenna design. Design and simulations are done using CST Microwave Studio program. A Reconfigurable Antenna is designed by using the FR-4 (lossy) substrate with the dielectric constant of er=4.3 and dielectric loss tangent 0.025. The substrate thickness of h=1.6mm, length=L_sub, width=W_sub. The ground is designed by using the PEC material with h-0.035mm and length=3/L_sub. The patch designed by using the copper with h=0.035mm, length=1/L_sub. In a result, return loss was below (S|11|<-13dB at 2.1GHz, S|11|<-24dB at 2.4GHz and S|11|<-13dB at 2.6GHz band. It is used varactor diode for tunably. Tunability is 5.19% at 2.1GHz, 0.035% at 2.4GHz and 12.5% at 2.6GHz. VSWR=1.5 at 2.1GHz, VSWR=1.1 at 2.48GHz and VSWR=1.5 at 2.6GHz. In the future, this antenna design will be fabricated and used in a mobile handset systems.
State-of-the-art IVEF Service based e-Navigation System
Bayarmaa Oyunchimeg,Jung Sik Jeong,Gyei-Kark Park 한국지능시스템학회 2013 한국지능시스템학회 학술발표 논문집 Vol.23 No.2
In this paper, we researched State-of-the-art IVEF Service based e-Navigation System. The unification of the data exchange format among maritime-related systems is one of vital user-needs of e-Navigation, advantageous in bringing maritime safety and security. This paper aims to introduce the design of Inter-VTS Exchange Format (IVEF), as recommended by the International Association of Aids-to-Navigation and Lighthouse Authorities (IALA), to enhance the information transmitted from Vessel Tracking Service (VTS) centers to Korea’s General Information Center on Maritime Safety and Security (GICOMS) as well as to the government-related agencies or vice-versa. To achieve this, a system dataflow was designed which it acts as client and server. It enables the sending and receiving of Radar and CCTV images in accordance with the IVEF recommendation document of IALA.
State-of-the-art IVEF Service based on e-Navigation System
Bayarmaa Oyunchimeg,Jung Sik Jeong,Gyei-Kark Park 한국지능시스템학회 2013 한국지능시스템학회논문지 Vol.23 No.6
In this paper, the state-of-the-art IVEF Service based on e-Navigation System was represented. The unification of the data exchange format among maritime-related systems is one of vital user-needs of e-Navigation, advantageous in bringing maritime safety and security. This paper propose the method to exchange marine information in IVEF, as recommended by the IALA, between VTS centers and Korea’s GICOMS as well as the government-related agencies. To achieve this, a system data flow was designed which it acts as client and server. It enables the sending and receiving of Radar and CCTV images in accordance with the IVEF recommendation document of IALA.
장은실(Eun-Sil Jang),김훈(Hun Kim),김빛나(Bit-Na Kim),바야르마 어용치맥(Bayarmaa Oyunchimeg),주양로(Yaung-Ro Joo),김갑기(Kab-Ki Kim) 한국정보기술학회 2011 Proceedings of KIIT Conference Vol.2011 No.5
본 논문에서는 Wi-Fi, WCDMA와 같이 차세대 이동통신으로 각광받고 있는 WiMAX에서 사용되는 소형 마이크로스트립 패치 안테나를 설계하였다. WiMAX의 주요 주파수 대역인 2.5 ㎓, 3.5 ㎓, 5.8 ㎓ 중 전 세계적으로 사용 가능한 3.5 ㎓용 안테나로써 ㅂ 자 모양으로 설계되었으며, 높은 이득을 나타낸다. In this paper, Wimax small microstrip antenna which is becoming next generation of mobile communication as Wifi and WCDMA is designed. Main frequencies of WiMax are 2.5 ㎓,, 3.5 ㎓, and 5.8 ㎓, Hence 3,5ghz ㅂ shaped antenna is designed in this paper because this frequency is used common in worldwide.