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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Navigation and Port Research
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Journal DOI :
Korean Institute of Navigation and Port Research
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Volume & Issues
Volume 36, Issue 9 - Dec 2012
Volume 36, Issue 10 - Dec 2012
Volume 36, Issue 8 - Oct 2012
Volume 36, Issue 7 - Sep 2012
Volume 36, Issue 6 - Aug 2012
Volume 36, Issue 5 - Jun 2012
Volume 36, Issue 4 - Jun 2012
Volume 36, Issue 3 - Apr 2012
Volume 36, Issue 2 - Mar 2012
Volume 36, Issue 1 - Feb 2012
Selecting the target year
A Research of Design and Implementation of Visual Program to Displaying External Factors of Marine Buoy using Quest3D
Lee, Seo-Jeong ; Lee, Jae-Wook ; Gug, Seung-Gi ;
Journal of Navigation and Port Research, volume 36, issue 8, 2012, Pages 599~605
DOI : 10.5394/KINPR.2012.36.8.599
As vessels are faster and bigger, higher safety navigation techniques have been required. In marine traffic area, buoy is to be one of the most important equipment, so that it should be built stable and robust. Verification in design level is good to accomplish it. This paper tries to implement visual program to confirm the external stability, which shows the movement on water by external factors such as wind, tide and current. Considering further requirements for additional influences or functions, design architecture for program introduces the concept of software component. Using Quest3D as the graphic tool, visual programming with software component concept can be implemented.
A Study on the Calculation of Resistance of the Ship to be Towed and Towline Tension
Nam, Taek-Kun ; Jung, Chang-Hyun ; Jeong, Jung-Sik ;
Journal of Navigation and Port Research, volume 36, issue 8, 2012, Pages 607~612
DOI : 10.5394/KINPR.2012.36.8.607
In this paper, calculation methods of resistance of the ship to be towed and towline tension are discussed. When the vessel is fallen into dead ship condition then appropriate towing force have to be estimated to move the vessel from accident place to safe area. In this research, resistance of the ship to be towed and the tow hawser were considered to estimate total towline tension. Polynomial interpolation method is also applied to estimate additional hydrodynamic resistance of towline. Finally, UI program to calculate the resistance and total towline tension is developed. The developed program based on the research results is effective and convenient to use.
Study on the Maneuverability of Barge by Captive Model Test
Yun, Kun-Hang ; Kim, Yeon-Gyu ;
Journal of Navigation and Port Research, volume 36, issue 8, 2012, Pages 613~618
DOI : 10.5394/KINPR.2012.36.8.613
For the tug-barge simulation, captive model test(Horizontal Planar Motion Mechanism) of the barge model is carried out. From the result of HPMM test, a resistance coefficient, maneuvering coefficients of the barge are obtained. A mathmatical model of the barge is validated by turning simulations with different angle of towing line applied a simple towing line model and the tactical diameter compared to sea trial data. As a result, the tactical diameter of the barge is smaller as the angle of towing line is bigger. The tactical diameter from simulations is smaller than that from sea trial data, may be caused by increased displacement of the barge.
Studies on the Redefinition of Terrestrial Navigation's Basic Terms - mainly on course and heading -
Moon, Serng-Bae ; Jun, Seung-Hwan ;
Journal of Navigation and Port Research, volume 36, issue 8, 2012, Pages 619~624
DOI : 10.5394/KINPR.2012.36.8.619
In 1969, Y.J. Yun wrote the terrestrial navigation text book that discussed earth sciences, aides to navigation, chart and publications, tide and tidal current, piloting, rhumb-line sailing, great circle sailing grounded on the hand-on background and theory. It has still been used as a principle text book in a lot of maritime academies and schools. And many contents and definitions came from other terrestrial navigation books published in the United States of America, the United Kingdom, and Japan. But some of them have caused the misunderstanding because they had no enough explanation and explained by incorrect items. In this study, we have found out the problems in the terms course and heading which are related with the direction of the vessel movement, and proposed the amended definitions in order to prevent the misunderstanding and confusion. of them.
Comparative Experiments for the Improvement of NDGPS Signal Quality
Sohn, Dong-Hyo ; Park, Kwan-Dong ; Kim, Hye-In ; Kim, Du-Sik ; Kee, Chang-Don ;
Journal of Navigation and Port Research, volume 36, issue 8, 2012, Pages 625~630
DOI : 10.5394/KINPR.2012.36.8.625
The DGNSS Central Office operates 17 DGNSS reference stations. Compared to the other DGNSS sites, the TEQC data quality of some sites is poorer. In this study, we tried to find out the causes that degrade the quality of GPS data for the purpose of improving the signal quality of the DGNSS stations. We selected the Chungju station that is the one of those stations with bad data quality. Through the on-site visit, we found that there is no signal-blocking obstacles. In addition to site surveys, we conducted two experiments; simultaneous observation considering environmental factors and comparison test through equipment replacements to check the malfunctioning of GPS equipments. In the simultaneous test results, we realized that environmental factors do not induce any bad effects on the data quality. In equipment replacement experiments, we confirmed that the data quality is of excellent quality when the test receiver was used instead of the original one installed at the site. When we replaced the antenna instead of the receiver, the data quality was bad. Through those two experiments, we concluded that the receiver is the main factor that degrades the signal quality.
A Study on Efficient Packet Design for Underwater Acoustic Communication
Park, Tae-Doo ; Jung, Ji-Won ;
Journal of Navigation and Port Research, volume 36, issue 8, 2012, Pages 631~635
DOI : 10.5394/KINPR.2012.36.8.631
Underwater acoustic communication has multipath error because of reflection by sea-level and sea-bottom. The multipath of underwater channel causes signal distortion and error floor. In this paper, in order to design an efficient packet structure, we employ channel coding scheme and phase recovery algorithm. For channel coding scheme, half rate LDPC channel coding scheme with N=1944 and K=972 was used. Also, decision directed phase recovery was used for correcting phase offset induced by multipath. Based on these algorithms, we propose length of data for optimal packet structure in the environment of oceanic experimentation.
A Study on the Optimization of Linear Equalizer for Underwater Acoustic Communication
Lee, Tae-Jin ; Kim, Ki-Man ;
Journal of Navigation and Port Research, volume 36, issue 8, 2012, Pages 637~641
DOI : 10.5394/KINPR.2012.36.8.637
In this paper, the method that reduce a computation time by optimizing computation process is proposed to realize low-power underwater acoustic communication system. At first, dependency of decision delay on tap length of linear equalizer was investigated. Variance is calculated based on this result, and the optimal decision delay bound is estimated. In addition to decide optimal tap length with decision delay, we extracted the MSE(Mean Square Error) graph. From the graph, we obtained variance value of the MSE-decision delay, and estimated the optimum decision delay range from the variance value. Also, using the extracted optimal parameters, we performed a simulation. According to the result, the simulation employing optimal tap length, which is only 40% of maximum tap length, showed a satisfactory performance comparable to simulation employing maximum tap length. We verified that the proposed method has 33% lower tap length than maximal tap length via sea trial.
Advanced Treatment of Shipboard Sewage by SBR Process with BM
Kim, In-Soo ; Chang, Jae-Soo ; Lee, Eon-Sung ; Koh, Sung-Cheol ;
Journal of Navigation and Port Research, volume 36, issue 8, 2012, Pages 643~649
DOI : 10.5394/KINPR.2012.36.8.643
Lab scale experiment study was carried out for biological treatment process development in cruise. SBR(Sequence Batch Reactor) process with BM(Beneficial Microorganisms) was investigated for practical application on shipboard sewage treatment. From the results it was suggested that SBR process with BM might be a suitable process for advanced cruise sewage treatment in terms of decrease in T-N and T-P, maintenance of useful microorganisms and control of sludge bulking. By adding BM to SBR system, about 40% of EPS in sludge was increased, about 74% of total nitrogen was reduced and the total phosphorus reduction averaged 75%.
Variation Landscape Enhancement Strategy through Coloring Plan in the Busan North Port Redevelopment
Kwon, So-Hyun ; Lee, Joong-Woo ;
Journal of Navigation and Port Research, volume 36, issue 8, 2012, Pages 651~657
DOI : 10.5394/KINPR.2012.36.8.651
In the Busan North port redevelopment project, which is the first large scale port redevelopment project in this country, it adopted the national landscape plan for competitiveness of port city. Furthermore, it includes many efforts on landscape formation in the process of improvement of ocean city image and enhancement of its value, which fits for the situation and characteristics of the original nature, history, and culture resources, together with all facilities, structures, symbols, and eco green belt. Firstly this study attempted to analyze the characteristics of Busan landscape, Busan city design plan(2010), especially coloring plan, together with the case study of landscape color plan for foreign countries. From the basis of this analysis, it was proposed a landscape enhancement strategy in the Busan North port redevelopment project through the coloring plan and it is expected that the result would be used for the basic data for other redevelopment project.
Reduction Effect for Deposition in Navigation Channel with Vegetation Model
Lee, Seong-Dae ; Kim, Seong-Deuk ; Kim, Ick-Hyun ;
Journal of Navigation and Port Research, volume 36, issue 8, 2012, Pages 659~664
DOI : 10.5394/KINPR.2012.36.8.659
Coastal vegetaion consists of rooted flowering marine plants that provide a variety of ecosystem services to the coastal areas they colonize. The attenuation of waves and sediments stabilization are often listed among these services. From this point of view, artificial vegetation model is an effective method of controlling sea bed and stabilization without damaging the landscape or the stability of the coastaline. In this study, numerical and hydraulic physical test for predicting deposition proces of a navigation channel caused by wave action is proposed. In the numerical model, we develop a numerical model for describing the wave attenuation and sediment transport in a navigation channel with a vegetation area. In addition, hydraulic model tests is performed in a navigation channel with irregular waves to examine the effect of vegetation in relation to deposition reduction in navigation channel. A comparison between the results of hydraulic and numerical tests shows resonable agreement.
Yard Crane Dispatching for Remarshalling in an Automated Container Terminal
Bae, Jong-Wook ; Park, Young-Man ;
Journal of Navigation and Port Research, volume 36, issue 8, 2012, Pages 665~671
DOI : 10.5394/KINPR.2012.36.8.665
A remarshalling is studied as an important operational strategy in an automated container terminal to enhance the productivity of container handling. This means the rearrangements of the containers scattered at a vertical yard block. The dispatching problem for remarshalling is selecting the remarshalling operation considering the available operation time and deciding the operation sequencing to maximize the effectiveness of remarshalling. This study develops the optimal mathematical model for yard crane dispatching problem with mixed integer program and explains dispatching problem using an example. However it is difficult to apply this model to a field problem because of its computational time. Therefore, we compare the representative 5 dispatching rules for real world adaption. In a numerical experiment, maximum weight ratio(MR) rule shows an overall outstanding performance.
The Effect of Relational Benefits, Reward Programs and Switching Costs on Relational Commitment in Container Terminals
Yang, Yun-Ok ; Shin, Chang-Hoon ;
Journal of Navigation and Port Research, volume 36, issue 8, 2012, Pages 673~681
DOI : 10.5394/KINPR.2012.36.8.673
As competition increases among ports, new marketing strategies and differentiated means in addition to the existing core services are needed to prevent existing container shipping companies from escaping and to attract new customers. The additional services and reward programs are investigated. How these variables affect relational commitment in terms of customer retention is examined. Customers of the container terminals are examined in terms of psychological behavior. This study presents the structural equation model that shows the connection among benefits, rewards, switching costs and relational commitment. The empirical analysis is done with the subject of the container terminal users and the implications are derived.
Technical Implication of an Intermodal Transport System for Implementation between Korea and China - On a train ferry system for Incheon harbor -
Ko, Jung-O ; Seo, Dae-Won ; Lee, Seung-Hee ;
Journal of Navigation and Port Research, volume 36, issue 8, 2012, Pages 683~689
DOI : 10.5394/KINPR.2012.36.8.683
The logistics industry is growing rapidly with China's economic development in recent years. Particularly, the intermodal freight system is becoming the main issue to reduce the logistic costs under the situation that the quantity of cargo transported between Korea and China is continuously increasing. Shift from road transportation to eco-friendly modes such as rail and coastwise shipping is also increasing. The present study suggests technical aspects related to the implementation of intermodal transport system centered on train ferries between two countries with already employed Chinese infrastructure into consideration. Technical assessment of intermodal train ferry system entails not only the vessels but supporting facilities and technologies as well. Port and rail facilities and operating skills for efficient modal shifting, and their standardization is indispensible to the realization of an intermodal train ferry system between the two countries.
A Study on the Small-medium Sized Freight Forwarders' Entry into UNPM -Subject to International Freight Forwarder & Delivery Service
Shin, Seok-Hyun ; Kwak, Kyu-Seok ;
Journal of Navigation and Port Research, volume 36, issue 8, 2012, Pages 691~698
DOI : 10.5394/KINPR.2012.36.8.691
Local freight forwarder's circle is suffering worsening profitability and insecure employment from over-competition which caused by a saturated local logistics market. It is emerging UN procurement market for local freight forwarders. However it is needed to study on successful entry, market status and supporting measures from government and research institute. Currently there are no national research data of UN procurement market in logistics sectors but as per the writer's experience and viewpoint to UN bidding, it would seem that appropriate measures should be made such as government's enhanced support for overseas advancement, price competitiveness, building global network and development of education program for trainees associated with current overseas internship program by government.