• Title/Summary/Keyword: ARPA

Search Result 58, Processing Time 0.027 seconds

Analysis of capabilities and application characteristic of AIS

  • Shiyuan, Wang;Kaiyu, Xu;Zhijing, Xu;Wenhua, Hu
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
    • /
    • 2006.10a
    • /
    • pp.223-229
    • /
    • 2006
  • This paper compares and analyzes the capabilities and application characteristic between the shipborne AIS and ARPA Radar. AIS base station and VTS Radar, give a brief introduction of the AIS base station network's building and application in China, and give a discussion on the information fusion and technology integrated of ATS and ARPA Radar, AIS base station network and VTS Radar.

  • PDF

New Paradigm in exhibition organization at the National Museum of Contemporary Art ('연구 업무 전담제'를 통해 살펴보는 국립현대미술관 전시 기획의 새로운 패러다임)

  • Choi, Eun-Ju
    • The Journal of Art Theory & Practice
    • /
    • no.3
    • /
    • pp.67-84
    • /
    • 2005
  • Since the evaluation of its intellectual activities and abilities is done by curator's capabilities, planning exhibition is very important as the final result achieved by their own knowledge, information, and research. ARPA(Advanced Research Project on Arts) is suggested as the system which enables curators responding simultaneously to the society in the times, based on its special characteristics. If this system settles well, which means that the curators at NMCA(National Museum of Contemporary Art, Korea) play their roles as the professionals in each of their fields, the goal of consolidating the status of museum as the representative national museum, and building up competent department of curators, will be achieved at the same time. To clarify above, the curators set up the various assignments of research about the types of arts such as painting, Korean painting, sculpture, installation, new-media, design, craft, photogarphy, architecture, etc. And they establish the art objects classified by the regions, such as the Northern American, Southern American, European, Asian, and other Third World countries. They elaborate art objects more on the history, the work, the artist, and the issue of contemporary art. Furthermore, when the curators devote deeper study to those research subjects, they can have the opportunities to design an exhibition upon the research. Today, the museum of art is 'The Place for Communication and Encounter', it is regarded important to share the aesthetical, creative values with current artists, and to understand mutually with the spectators. It is needed to improve the curator's work, in order to meet the demands of the times and even to advance. Because the form of 'exhibition' is the tool that reveals the identity NMCA aiming at, the motivation, the development, and the realization should be leaded by the curators, who are the mainstream of the museum. ARPA is a system for identifying the exhibition like mentioned above. The main purpose of this system is to produce synergy effect, having the researching, collecting work in liaison with planning exhibition. ARPA will be able to improve the quality of exhibition through the way of developing the exhibition, passing through the stable process in the long run. So far, I have referred to a new paradigm of the exhibition design at NMCA via ARPA. Yet, there still remain missions in reality, such as analyzing the previous exhibition and reshuffling personnel and system, which should be done. When these matters settled, these plans would be suggested practically. At this point, it is the most significant that NMCA is attempting to let others aware of the importance of exhibition planning based on research. when the ARPA and exhibition planning is conjoined together successfully, the competent exhibition will be achieved, which can offer a meaningful exhibition to the art world, strengthen infra structure thru exchanging with public museum in the region, and eventually, establish a network with museum in foreign countries.

  • PDF

Inhibition of Aminopeptidase N by Two Synthetic Tripeptides

  • Chung, Myung Chul;Hyo Kon Chun;Ho Jae Lee;Choong Hwan Lee;Su Il Kim;Yung Hee Kho
    • Journal of Microbiology and Biotechnology
    • /
    • v.6 no.1
    • /
    • pp.7-11
    • /
    • 1996
  • MR-387Al (ARPA-Val-Pro) and A2 (AHPA-Val-Hyp) were prepared as aminopeptidase N inhibitors through the synthesis of peptide MR-387A and B analogues which contained 3-amino-2-hydroxy-4-phenyl butanoic acid (ARPA) as a zinc-chelating moiety. They are competitive inhibitors of aminopeptidase N with inhibition constants(Ki) of 4.1 $\times 10^{-7}\;and 1.1 \times 10^{-6}$ M, respectively. MR-387Al also strongly inhibited aminopeptidase B of human myelogenous leukemia K-562 cell with $IC_50$ of 0.35 $\mu$ M. Inhibitions of aminopeptidase N activity by ARPA-bearing inhibitors of various peptide chain lengths also have been studied. $IC_ 50$ values of AHPA-Val (bestatin), ARPA-Val-Pro (MR-387Al) and ARPA-Val-Pro-Leu (MR-387C) compared against porcine kidney aminopeptidase N were 20.1, 0.60 and 0.08 $\mu$ M, respectively. These results support that a multiple interaction between the $S_1\to S'_3$ sites of aminopeptidase N and the $P_1\to P'_3$ of the inhibitor plays a crucial role in stabilizing strongly the enzyme-inhibitor complex.

  • PDF

The Design of a Meaning Interpretation Model for Supporting Linguistic Navigation Safety Information (언어적인 항해안전정보 지원을 위한 의미해석 모델 구축에 관한 연구)

  • Kim, Young-Ki;Park, Gyei-Kark;Yi, Mi-Ra
    • Journal of the Korean Institute of Intelligent Systems
    • /
    • v.21 no.2
    • /
    • pp.198-205
    • /
    • 2011
  • GPS, ARPA, AIS, NAVTEX, VHF as modern aids-to-navigation equipments improve the safe navigation and help to reach a reduction in marine accidents by providing images, numeric values, texts, audio-based information for mates, However, we also noticed that it's complicate and difficult for a mate to acquire and analyze such information from these devices while he should devote himself to bridge watchkeeping especially in the urgent situation. Language is another way to get information and free the eyes and hands, so, to solve the problem above, we are trying to propose a new aids-to-navigation system, which can understand and merge multimedia marine safety information, analyze the situation and provide the necessary information in language. In this paper, we try to suggest a meaning interpretation model for supporting linguistic navigation safety information.

Development of Acquisition and Analysis System of Radar Information for Small Inshore and Coastal Fishing Vessels - Position Tracking and Real-Time Monitoring- (연근해 소형 어선의 레이더 정보 수록 및 해석 시스템 개발 -위치 추적 및 실시간 모니터링 -)

  • 이대재;김광식;신형일;변덕수
    • Journal of the Korean Society of Fisheries and Ocean Technology
    • /
    • v.39 no.4
    • /
    • pp.337-346
    • /
    • 2003
  • This paper describes on the system and method for automatically tracking and real-time monitoring the position of target ships relative to the own ship using a PC based radar system that displays radar images and electronic charts together on a single PC screen. This system includes a simulator for generating the GGA and VTG information of target ships and a simulator for generating the TTM and OSD outputs from a ARPA radar and then host computer accepts NMEA0183 sentences on the maneuvering information of target ships from these simulators. The results obtained are summarized as follows;1. The system developed this study can be used as a range finder for measuring the distance between two ships and as a device for providing the maneuvering information such as distance and bearing to target ships from own ship on ECS screen. 2. From the result of position tracking for a selected target ship tracked with an update rate of 5 seconds using the $\alpha$-$\beta$ tracker, we concluded that the smoothing effect by the $\alpha$-$\beta$tracker was very effective and stable except in the time interval until about one minute after the target is detected. 3. From the fact that the real-time maneuvering information of tracked ship targets via a local area network (LAN) from a host computer installed a radar target extractor was successfully transferred to various monitoring computers of ship, we concluded that this system can be used as a sub-monitoring system of ARPA radar.

A Study on the Ship Information Fusion with AIS and ARPA Radar using by Blackboard System (블랙보드 시스템을 이용한 AIS와 ARPA Radar의 선박 정보 융합에 대한 연구)

  • Kim, Do-Yeon;Park, Gyei-Kark;Kim, Hwa-Young
    • Journal of the Korean Institute of Intelligent Systems
    • /
    • v.24 no.1
    • /
    • pp.16-21
    • /
    • 2014
  • In recent, the maritime traffic has increased with an increase in international trading volumes and the growing popularity of marine leisure activities. As increasing of maritime traffic, marine accidents happened continually and there are possibilities of accidents at sea. According to the analysis of marine accidents, most accidents occurred by human error of seafarers. To reduce the accidents by human error, the various assistance system for assist seafarers have been proposed. It is required to real-time data management method for applying to real-time system, but most proposed assistance system used off-line data for analysis. In this paper, we aim to build a navigation supporting system for providing safety information to deck officer with data of AIS(Automatic Identification System) and ARPA Radar(Automatic Radar Plotting Aids Radar), and proposed a management algorithm for real-time ship information with blackboard system and verified the validity.

Basic Study on the Comparison of Performance of α-β-γ filter and Kalman Filter for use in a Tracking Module for ARPA system on Board High Dynamic Warships

  • Njonjo, Anne Wanjiru;Pan, Bao-Feng;Jeong, Tae-Gweon
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
    • /
    • 2016.05a
    • /
    • pp.302-304
    • /
    • 2016
  • The purpose of this paper is to draw comparison between the performance of ${\alpha}-{\beta}-{\gamma}$ filter and Kalman filter of a tracking module for ARPA system on board high dynamic warship. The comparison is based on the filters' capability to reduce residual error and maintain a stable transient response. The residual error is computed from the difference between the observed the predicted positions for the entire tracking period. The results indicate that the Kalman filter has a higher tracking accuracy compared to the optimal ${\alpha}-{\beta}-{\gamma}$ filter. However, both filters have a similar transient response.

  • PDF