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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 28, Issue 9 - Dec 2004
Volume 28, Issue 10 - Dec 2004
Volume 28, Issue 8 - Oct 2004
Volume 28, Issue 7 - Sep 2004
Volume 28, Issue 6 - Aug 2004
Volume 28, Issue 5 - Jun 2004
Volume 28, Issue 4 - Jun 2004
Volume 28, Issue 3 - Apr 2004
Volume 28, Issue 2 - Mar 2004
Volume 28, Issue 1 - Feb 2004
Selecting the target year
A Posture Control for Underwater Vehicle with Nonholonomic Constraint
Nam, Taek-Kun ; Kim, Chol-Seong ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 469~474
DOI : 10.5394/KINPR.2004.28.6.469
In this paper, we study the posture control of an underwater vehicle with nonholonomic constraint. Generally, systems with nonholnomic constraints cannot be stabilized to an equilibrium points by smooth state feedback control. For the nonholonomic underwater vehicle system, we applied coordinate transformation to get multi-chained system We proposed non smooth feedback controller using backstepping method for stabilizing the multi chained form system Applying inverse input transformation to the non smooth feedback controller, we can get posture controller of the underwater vehicle with nonholonomic constraint. The proposed control scheme is applied to the posture control qf an underwater vehicle and verified the effectiveness of control strategy by numerical simulation.
Automatic Control for Ship Collision Avoidance Support-III
Im, Nam-Kyun ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 475~480
DOI : 10.5394/KINPR.2004.28.6.475
Author presented some study with regard to “automatic control for ship collision avoidance system” before. Those papers are to deal with unsolved problem,; in the previous study. In this paper, two issues relating to ship collision avoidance were investigated. One is to suggest a new algorithm of avoidance of a group ship. This algorithm is useful when a ship takes avoiding action for a group fish boats and a group of merchant vessels. In the stage of taking avoidance action, newly-developed algorithm was used. the other is to develop a unified model of collision risk. Generally collision risk changes according to various type of encounters. The new model is to take into account of these situations. The above-mentioned algorithm and model were verified through simulation under various encounters between ships.
Collision Strength Assessment for Double Hull Type Product Carrier Using Finite Element Analysis
Paik, Jeom-Kee ; Lee, Jae-Myung ; Lee, Kyung-Ern ; Won, Suk-Hee ; Kim, Chelo-Hong ; Ko, Jae-Yong ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 481~489
DOI : 10.5394/KINPR.2004.28.6.481
Ship collisions and grounding continue to occur regardless of continuous efforts to prevent such accidents. With the increasing demand for safety at sea and for protection of the environment, it is of crucial importance to be able to reduce the probability of accidents, assess their consequences and ultimately minimize or prevent potential damages to the ships and the marine environment. Numerical simulations for actual collision problem are conducted with a special attention with respect to finite element size, fracture criteria and material properties, which require a careful consideration to improve the accuracy. A parametric analysis varying colliding speed, angle, design loading condition is conducted using nonlinear finite element analysis method for 46,00 dwt Product/chemical carrier. The relationship between the absorbed energy and indentation are derived quantitatively using the insights observed from this study, and a novel design concept for assessing the anti-collision performance are proposed.
Acoustic Transfer Characteristics of Ship′s Bridge for Whistle Sound
Yim, Jeong-Bin ; Kim, Chang-Kyoung ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 491~496
DOI : 10.5394/KINPR.2004.28.6.491
The paper describes measurement techniques for an acoustic transfer characteristic of ship`s bridge stimulated by a whistle sound The response sounds, according to the opening-shutting conditions of bridge doors for Training Ship ‘SAENURI’, are measured by B＆K 2260D equipment, and then the frequency responses are extracted by B＆K 7830 software. To evaluate the measured transfer characteristic, the 128th order FIR (Finite Impulse Response) filters, containing the different frequency characteristics, are constructed based on the frequency sampling-based design method Using evaluation indexes with six scales, psychological assessments by five subjects are carried out with test sounds which are obtained from convolving the source signal with FIR filters. As results of tests, the test sounds gives
3.3∼4.7 which means the psychological sense of ‘it is almost similar sound as original ones in a real world’, and thus it is clearly seen that the proposed method can be used for the measurement of an acoustic transfer characteristic of ship’s bridge.
A Study on the Development of Level Sensor using Frequency Modulated Continuous Wave
Park, Dong-Kook ; Han, Tae-Kyoung ; Park, In-Yong ; Yoon, Chun-Su ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 497~501
DOI : 10.5394/KINPR.2004.28.6.497
In this paper, it is presented a level sensor for measuring a level of the contents of cargo tank using frequency modulated continuous wave(FMCW). The frequency range is 10∼11 GHz, the radar cross section(RCS) of test target is
of metal plate. The experiment is performed in laboratory and open ground, the sweep time of the signal is 100 ms, the pyramidal horn antenna of about 22 dBi gain is used, and input power of antenna is about 8 dBm The beat frequency according to the target moving to 40 m is measured. There is a good agreement between measured and calculated results. But the resolution of the FMCW radar is measured about 10 cm due to nonlinear of voltage controlled oscillator(VCO).
Development of Composite Sr Ferrite EM Wave Absorbers for GHz Frequency
Kim, Dong-Il ; Moon, Sang-Hyun ; Shin, Sung-Jae ; Song, Jae-Man ; Kim, Ki-Man ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 503~507
DOI : 10.5394/KINPR.2004.28.6.503
We prepared EM wave absorbers by using recycled Sr ferrite for GHz frequency, and investigated the effects of carbon additions and preparation temperatures on their EM wave absorption properties. A Sr ferrite EM wave absorber with the ratio of Sr ferrite: silicon rubber: carbon
Forecasting of Passenger Numbers, Freight Volumes and Optimal Tonnage of Passenger Ship in Mokpo Port
Jang, Woon-Jae ; Keum, Jong-Soo ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 509~515
DOI : 10.5394/KINPR.2004.28.6.509
The aim of this paper is to forecast passenger numbers and freight volumes in 2005 and it is proposed optimal tonnage of passenger ship. The forecasting of passenger numbers and freight volumes is important problem in order to determine optimal tonnage of passenger ship, port plan and development. In this paper, the forecasting of passenger numbers and freight volumes are performed by the method of neural network using back-propagation learning algorithm. And this paper compares the forecasting performance of neural networks with moving average method and exponential smooth method As the result of analysis. The forecasting of passenger numbers and freight volumes is that the neural networks performed better than moving average method and exponential smoothing method on the basis of MSE(mean square error) and MAE(mean absolute error).
PPGA for the Optimal Load Planning of Containers
Kim, Kil-Tae ; Cho, Seok-Jae ; Jin, Gang-Gyoo ; Kim, Si-Hwa ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 517~523
DOI : 10.5394/KINPR.2004.28.6.517
The container load planning is one of key factors for efficient operations of handling equipments at container ports. When the number of containers are large, finding a good solution using the conventional genetic algorithm is very time consuming. To obtain a good solution with considerably small effort, in this paper a pseudo-parallel genetic algorithm(PPGA) based on both the migration model and the ring topology is developed The performance of the PPGA is demonstrated through a test problem of determining the optimal loading sequence of the containers.
An Empirical Study on Port Selection Criteria -Classification of Inter/External factors and Importance of External factors-
Kim, Yul-Sung ; Lee, Hong-Girl ; Shin, Chang-Hoon ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 525~530
DOI : 10.5394/KINPR.2004.28.6.525
Due to the rapid growth of Chinese ports, currently, research for the improvement of competitiveness of Busan port have been intensively studied. These research have mostly evaluated or analyzed competitiveness of ports, and then, based on results of analysis, have suggested some strategies for enhancing competitiveness of Busan port. However. although implications of these previous studies are practically available to build policies for Busan port, basic studies such as identification of port competitiveness( or port selection) related factors for reasonable evaluation and analysis which have contributions in academic area have been very rare. The primary objective of this study is to investigate port selection criteria, based on empirical data Especially, in this study, we classify internal /external factors, and present importances of external factors that have yet to be empirically identified in previous studies.
Three-Dimensional Container Packing Problem with Freight Priority
Bae, Min-Ju ; Choi, Se-Kyoung ; Kim, Hwan-Seong ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 531~539
DOI : 10.5394/KINPR.2004.28.6.531
In this paper, we propose a new heuristic solution for 3D container packing problem for the variable sizes and types of freight. Frist of all, we consider the total cost of container charge i.e., handling, loading and transportation, where each freight will be specifically identified The types of containers and its number to be loaded am be selected automatically by minimizing the total cost of container charge. Maximization of loading space am be achieved efficiently by operating the palletizing and/or depalletizing of freight. By considering these factors we can determine the position of freight in the container and the loading sequence to be packing into the container. In container packing simulation, we can verify that the proposed heuristic algorithm indicates more efficiency space utilization and shows the possibility of using on commercial business.
Position Control of Linear Motor-based Container Transfer System using DR-FNNs
Lee, Jin-Woo ; Suh, Jin-Ho ; Lee, Young-Jin ; Lee, Kwan-Soon ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 541~548
DOI : 10.5394/KINPR.2004.28.6.541
In the maritime container terminal. LMCTS (Linear Motor-based Container Transfer System) is horizontal transfer system for the yard automation, which In., been proposed to take the place of AGV (Automated Guided Vehicle). The system is based on PMLSM (Permanent Magnetic Linear Synchronous Motor) that is consists of stator modules on the rail and shuttle car (mover). Because of large variant of mover`s weight by loading and unloading containers, the difference of each characteristic of stator modules, and a stator module`s trouble etc. LMCTS is considered as that the system is changed its model suddenly and variously. In this paper, we will introduce the softcomputing method of a multi-step prediction control for LMCTS using DR- FNN (Dynamically-constructed Recurrent Fuzzy Neural Network). The proposed control system is used two networks for multi step prediction Consequently, the system has an ability to adapt for external disturbance, detent force, force ripple, and sudden changes by loading and unloading the container.
An Estimate of the Required Number of Yard Tractor in Container Terminal
Choi, Yong-Seok ; Kim, Woo-Sun ; Ha, Tae-Young ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 549~555
DOI : 10.5394/KINPR.2004.28.6.549
The purpose of this study is to estimate the required number of yard tractor on port container terminal. The number of yard tractor is the bottleneck factor on the efficiency of container terminal. Due to the change in travel speed and travel distance, the efficiency is difficult to estimate. The efficiency of yard tractor is estimated by the proposed simulation model that developed considering the queueing network between container crane and transfer crane. The number of yard tractor per container crane is estimated by the alternative analysis. And to determine the number of yard tractor per container crane, the performance measure such as the distance between berth and yard, the speed of yard tractor are simulated.
Reproduction of Extreme Waves Caused by Typhoon MAEMI with Wave Hindcasting Method, WAM (I) - Corrections of directional spreading division and limitation on wave development of WAM model -
Shin, Seung-Ho ; Hong, Key-Yong ; Choi, Hak-Sun ; Noriaki Hashimoto ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 557~564
DOI : 10.5394/KINPR.2004.28.6.557
The WAM wave model has been widely used for wave hindcasting in the ocean by many domestic and foreign researchers due to its relative simplicity and high accuracy. As this model was originally developed for the condition of deepwater and comparatively coarse grid size covering wide area, it might produce in a fault result caused by the improper distribution of directional spreading. We extensively investigated involved problems based on WAM Cycle 4 model and suggested the improved WAM model so that it is applicable to both shallow water sea and fine mesh wave simulation The modified W AM model is verified here by comparing the computed result with and the observed data at Ieodo Ocean Research Station for September of 2003.
Numerical Simulation in relation with Coastal Current and Stratification of Water at the Semi-enclosed Estuary
Lee, Woo-Chul ; Lee, Joong-Woo ; Park, Dong-Jin ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 565~572
DOI : 10.5394/KINPR.2004.28.6.565
Residual current plays more important role than the tidal current for long-term material transport in coastal areas. The main component of residual current is tide-induced residual current. Otherwise, wind driven current and buoyancy-driven current are important components which change the residual current. To clarify the characteristic of coastal current, application of a three -dimensional model is necessary. This study focuses on clarifying the stratified systems of coastal water affected by freshwater runoff from a river and analyzes the structure of current at Ulsan bay by applying a three-dimensional buoyancy-driven current model. According to the result of “Ulsan bay” study, it shows that the surface layer in semi-enclosed estuaries, which affected by freshwater runoff. has flows going out, and the bottom layer has flows coming in. Besides when the wind blows toward inside of the bay, the surface layer has flows coming in and the bottom layer has flows going out as compensation flows for the surface circulation. The results of simulation could be applicable to examine vertical upwelling, which might be caused by construction of artificial fishing reef to build aqua farm, submerged breakwater to control coastal sediment, and the formulation of oceanic ridge, or a basic study on application to the usage of deep water.
Development of Red-Tide Prediction Technique Using Quartz Crystal Oscillator
Kim, Byoung-Chul ; Kim, Young-Han ; Chang, Sang-Mok ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 573~578
DOI : 10.5394/KINPR.2004.28.6.573
The most important effects on algae multiplication are coming from maintaining the growth environment such as necessary nutrients and proper temperature, but it is difficult to adjust for every species individually. In this study, therefore, the environment is obtained using the local water where target organisms live, and their growth is promoted by raising the water temperature. A sensor to count the organism population is developed here. Because the early stage of a sudden increase of the algae population is detected using the sensor, it is available to predict the sudden increase of algae, a source of red tide.
Preliminary study on the establishment of marine leisure sports infrastructure program
Jun, Seung-Jun ; Ha, Hae-Dong ; Kang, Sin-Young ; Cheong, Yeong-Seok ; Jeong, Eun-Seok ;
Journal of Navigation and Port Research, volume 28, issue 6, 2004, Pages 579~585
DOI : 10.5394/KINPR.2004.28.6.579
The data were collected from the water sports industries, resort owners, equipment manufactures and the associations. The inquiry and data collection were made by visiting the corresponding facilities. Based on these data, the plan for infra construction of water leisure sports were proposed