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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Navigation and Port Research
Journal Basic Information
Journal DOI :
Korean Institute of Navigation and Port Research
Editor in Chief :
Volume & Issues
Volume 29, Issue 9 - Dec 2005
Volume 29, Issue 10 - Dec 2005
Volume 29, Issue 8 - Oct 2005
Volume 29, Issue 7 - Sep 2005
Volume 29, Issue 6 - Aug 2005
Volume 29, Issue 5 - Jun 2005
Volume 29, Issue 4 - Jun 2005
Volume 29, Issue 3 - Apr 2005
Volume 29, Issue 2 - Mar 2005
Volume 29, Issue 1 - Feb 2005
Selecting the target year
A Study on the Limit of Anchor Dragging for Ship at Anchor( I )
Lee Yun-Sok ; Jung Yun-Chul ; Kim Se-Won ; Yun Jong-Hwui ; Bae Suk-Han ; Nguyen Phung-Hung ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 357~363
DOI : 10.5394/KINPR.2005.29.5.357
When typhoon approaches, ship normally drops her anchor at proper anchorage for sheltering. If an anchored ship is under the influence of typhoon, she can keep her position when the external force and counter force is balanced. Where, external force is induced by wind, wave and tidal currents while counter force is induced by holding power of anchor/chain and thrust force of main engine. In this study, authors presented a method to analyze theoretically the limit of external force for the ship to keep her position without being dragged and, to check the validity of the method, applied this to the ship which had been anchored in Jinhae Bay when the typhoon MAEMI passed on September 2003.
A Study on the Evaluation and Validation of IMO Manoeuvrability Standards of Vessels
Lee Chun-Ki ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 365~370
DOI : 10.5394/KINPR.2005.29.5.365
Many sea accidents such as collisions and groundings of vessels were occurred due to the lack of sufficient manoeuvring capability of vessels. Therefore IMO adopted `The interim standards of ship manoeuvrability by Resolution A.751(18)` and the standards have been applied to vessels of 100m or more in length and all chemical tankers and gas carriers regardless qf the length, which were constructed on or after 1 July 1994. The IMO manoeuvrability standards are divided into three kinds as bellows; (1) Turning capability standards : Estimated values in design stage are to be certified by turning circle test of the actual vessel. (2) Course keeping quality standards : Estimated values in design stage are to be certified by
Zig-Zag tests of the actual vessel. (3) Shortest stopping distance standards : Estimated values in design stage are to be certified by the shortest stopping distance tested by the actual vessel. In this paper, the authors computed the values of the manoeuvring standards of several vessels from their original design and compared them with those results from experiments of the model ships and also examined the values and concluded about the validity of IMO manoeuvrability standards.
An Empirical Study on the Selection of Remote Island Route Service Provider Using AHP
Noh Chang-Kyun ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 371~376
DOI : 10.5394/KINPR.2005.29.5.371
A range of problems have risen as the results of the obligated charter service. Constant lack of operation improvement compared to regular routes and lower quality service are results of business practice by the service providers. Therefore, this study executed an empirical research using AHP to present a method for improvement by investigating remote island charter service providers. Result shows that the desirable method is to implement operation evaluation system to induce service providers to consistently put efforts on the operating system development.
Calculation of Securing and Lashing Loads of Containers on the Deck of a Ship in Waves (I)
Yoon Hyeon-Kyu ; Lee Gyeong-Joong ; Yang Young-Hoon ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 377~382
DOI : 10.5394/KINPR.2005.29.5.377
A ship runs with various modes of motion due to waves. Among the modes, roll mainly influences on the safety of cargos on the deck of container ship. In order to protect cargo shifting and turning, securing and lashing system are generally installed. In that case, it is necessary that the force and moment at the connection point of containers should be estimated. Therefore we derived mathematical equations to calculate the forces of securing points and lashing wires. Also we calculated those forces and moments about various lashing patterns.
A Study on the Dynamic Response Analysis of the Fishery Barge Type Offshore Structure for Fitting Radar Reflector
Park Sung-Hyeon ; Jeong Jung-Sik ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 383~388
DOI : 10.5394/KINPR.2005.29.5.383
To install a radar reflector on small ships, such as a small fishing vessel, a fishery buoy, and a barge ship for fishery, it is very important to develop the optimal system which may determine a proper installation location. For this, the response characteristics how waves have an effect on the small ships should be accurately analyzed. In this paper, we analyze the dynamic behaviors of small ships, which may be caused by irregular waves. To do this, we investigate how a barge ship responses to wavelength, water depth, and directions of incoming waves. The analyzed results shall be utilized to evaluate an effect on a radar cross section when we install an radar reflector on a barge ship for fishery and a small ship.
Dynamic Analysis of Superstructures on Very Large Floating Structure with Semi-Rigid Connections
Song Hwa-Cheol ; Kim Woo-Nyon ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 389~394
DOI : 10.5394/KINPR.2005.29.5.389
The additional moment occurs because the superstructures of VLFS are influenced by wave loads instead of earthquake loads. In order to reduce the additional moment, this study used the semi-rigid connections which lie between fully rigid and pinned. If the semi-rigid connections are used for superstructures of VLFS, the moment of beams can be reduced and more economical construction will be possible. This study aims to show the effect of wave loads on structure and the efficiency of the semi-rigid connections due to wave loads by analyzing the time history responses. The dynamic behaviors of the rigid frame are compared with those of the semi-rigid frame considering of static loads, wave loads and combination loads for a four-bay, three-story frames. The semi-rigid connection type is a steel tubular column with square external-diaphragm connections and the time history analysis is used for the dynamic responses. The additional moment responses due to wave loads increase
in the rigid frame,
in the semi-rigid frame with the spring model.
Evaluation of Waterway Dredging Work using Spud Dredge Process Management System
Lee Joong-Woo ; Jeong Dae-Deuk ; Cho Jueng-Eon ; Kim Ju-Young ; Oh Dong-Hoon ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 395~402
DOI : 10.5394/KINPR.2005.29.5.395
The most important point when we engage on waterway dredging work is supplying safe navigational passage to the vessels underway by narrowing dredge work area and removing submerged dangers. In order to meet this end it is necessary to use auxiliary equipment for shifting actively and mooring and adopt automation of dredging work by integrating information on real time position, dredging depth, and work information. The dredger with a spud control system in this study, by the way, is able to employed on continuous dredging work with the narrowest working area allowing wide and safe passages to vessels underway, by moving the dredger to the working zone with the spud controlled automatically. Furthermore, it has been improved definitely compared with the existing dredging process management system such that it shows the track of spud and working depth on the electronic navigation chart of window, together with the final outcome of dredging work. The test dredging work at the entrance of Busan North Port for system evaluation showed that actual working time available was twice of the one by the existing anchor system, and that it reduced
of time for preparation work and one man power.
A Study on Spatial Smoothing Technique for Angle of Arrival Estimation of Coherent Incoming Waves
Jeong Jung-Sik ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 403~408
DOI : 10.5394/KINPR.2005.29.5.403
The techniques of estimating angle of arrival(AOA) have played a key role for enhancement of wireless communications using array antennas. Among those techniques, the superresolution algorithms, such as MUSIC and ESPRIT, calculate the covariance matrix of the array output vectors which are observed at the array antennas, and then by using eigen-decomposition of the covariance matrix, they estimate AOAs of the received signals with high accuracy. However, superresolution algorithms based eigenvalue decomposition fails to estimate AOAs under multipath environments. Under multipath environments, it is difficult to estimate AOAs of the received signals due to coherency and high-correlation. To resolve coherent signals, the covariance matrix is calculated by using the conventional spatial smoothing technique, and then the techniques based on eigen-descomposition is applied. The result of the conventional spatial smoothing technique, however, is obtained at the cost of losing effective spatial aperture. Moreover, the conventional technique ignores any information in the cross-correlations of the array outputs the subarrays. As the result, the performance for AOA estimation is degraded. In this paper, we propose a new spatial smoothing technique, which consider the cross-correlation for subarrays. By computer simulation, the AOA estimation performance of the proposed method is compared with the conventional method and evaluated.
Operation of Container Cranes Using ℓ
Kim Young-Han ; Chang Sang-Mok ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 409~413
DOI : 10.5394/KINPR.2005.29.5.409
The existing control techniques for the operation of a container crane satisfy the terminal condition of controlled variables, but the outcome of input computation is inadequate for the operation of the crane due to heavy movement of inputs. In this study, a new control technique employing a nonlinear model of the crane is proposed to compute the inputs approximated with the 4th-order Chevyshev function. The control objective of sum of absolute deviations is minimized, and the optimization is conducted with the simplex algorithm. The inputs and outputs computed from the proposed technique were compared with the results of the previous study to show that they give more stable crane operation than the existing control technique.
Structural Optimization for LMTT-mover of a Crane
Lee K.-H. ; Min K. A. ; PARK H. W. ; Han D. S. ; Han G. J. ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 415~420
DOI : 10.5394/KINPR.2005.29.5.415
LMTT (Linear Motor-based Transfer Technology) is the horizontal transfer system for yard automation, which has been proposed to take the place of AGV (Automated Guided Vehicle) in the maritime container terminal. The system is based on PMLSM (Permanent Magnetic Linear Synchronous Motor) that consists of stator modules on the rail and shuttle car. It is desirable to reduce the weight of LMTT in order to control the electronic devices with minimum energy. In this research, structural optimization for a mover of shuttle car is performed to minimize the weight satisfying design criteria. The objective function is set up as weight. On the contrary, the design variables are transverse, longitudinal and wheel beams` thicknesses and its height, and the constraints are considered as strength and stiffness.
A Determination of the Optical Containership Size Using a Total Shipping Cost Analysis
Kim Tae-Won ; Kwak Kyu-Seok ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 421~429
DOI : 10.5394/KINPR.2005.29.5.421
Traditionally, determination of the optimal containership size is the most important factor for competitiveness of shipping companies in the shipping market. Under this environment, many shipping companies and researchers have studied about it. The objective of this research is to determine the optimal containership size using a total shipping cost in the main trunk lines. Total shipping cost is calculated at the ground of capital costs, vessel operation costs, voyage costs, port charges and miscellaneous costs for `Europe-Far East`, `Far East-North America` and `Europe-Far East-North America` services. Analysis results showed that the 6,500TEU containership is an optimal size on the `Europe-Far East` and `Europe-Far East-North America` services. And the 8,200TEU containership is an optimal size on the `Far East-North America` service. Moreover, if the larger containerships over 8,200TEU class start operation afterward, it would be less competitive in the analyzed 3services.
A Study on the Method of Freight Generation Estimation according to Company Size in Seoul Metropolitan Area
Park Sang-Chul ; Choi Chang-Ho ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 431~437
DOI : 10.5394/KINPR.2005.29.5.431
In korea, Freight generation models developed in korea were estimated by spatial unit method which predict freight flow by traffic zone. But it is difficult to predict freight generation using these models, because there are the difference of the totality method of sampling data on freight volume and the variability of the variables by these models on each case study, This study developed new estimation model to predict freight flow which is generated from each company using the characteristics of each company such as the freight outbound & inbound volume, the number of employee, sales, gross area, land area. This model is simpler than the that of spatial unit and can apply to the other region. The subjects of study were companies in metropolitan area and types of model were exponential regression models. The adequate explanatory variable in the models were sales. this study have a uniqueness apply micro research method to estimate freight generation not use spatial unit method but use flow unit method by each company unit.
Simplified Clearance Formalities of Northeast Asia port
Choi Hyung-Rim ; Park Nam-Kyu ; Park Young-Jae ; Cho Jae-Hyung ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 439~445
DOI : 10.5394/KINPR.2005.29.5.439
Recently, owing to the increasing demand on the simplification of arrival and departure procedures, IMO`s (International Maritime Organization) Facilitation Committee (FAL) is carrying out the standardization project of arrival and departure formalities and clearance form. Also, many port authorities of developed countries are making active researches for the smooth flow and efficiency of the information inbound and outbound ships by way of simplifying their formalities or through electronic means. However, this standardization project cannot be done by one country but by mutual cooperation among related nations. And to carry out this task, the first thing to be done is to standardize the formalities and document form, and to integrate information. To this end, this study has reviewed the model cases of advanced ports of developed countries with regard to their simplification and standardization efforts. And also we have analyzed the formalities and clearance form of the three countries Korea, China, and Japan. And then for the solution of common problems of three countries, this paper has suggested an ebXML-based Global Port B2B framework. Through this framework, we can reuse and automate the necessary information on the arrival and departure of ships, consequently realizing simplification, and laying a foundation for the introduction of e-commerce to the port industry.
A Heuristic Approach to Scheduling Multiple Cranes for Intra-Block Remarshalling
Oh Myung-Seob ; Kang Jaeho ; Ryu Kwang Ryel ; Kim Kap Hwan ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 447~455
DOI : 10.5394/KINPR.2005.29.5.447
Intra-block remarshalling is the task of rearranging into some target bays those containers which are scattered within around the block. If multiple transfer cranes installed in the block are all used together we may be able to complete the remarshalling task as early as possible. However, when multiple cranes are used simultaneously, there may occur significant delays if we do not carefully consider interferences between the cranes at the time of scheduling. Especially, delays caused by interferences occur more frequently in case of using non-crossing cranes. This paper presents an efficient heuristic method for assigning moves of containers to each crane and for determining an appropriate container moving order in a manner sensitive to the interferences. Simulation experiments have shown that the proposed method can effectively reduce delays in various environments.
A Study on the Effective Database Integration Methodology - The Identification of Name Conflict -
Lee Hong-Girl ; Higa Kunihiko ; Fujikawa Takayuki ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 457~464
DOI : 10.5394/KINPR.2005.29.5.457
Database integration has been recognized as a critical issue for effective logistics service in logistics environment. However, research related to effective methodology for this have been little studied, and also, prominent achievements have yet to be suggested. The aim of this paper is to present a quantitative methodology for the identification of conflict that is a representative problem on database integration. To achieve this aim, we suggested a quantitative methodology that can efficiently fine troubles such as name conflicts when schema integration, based on the level of semantic similarity between attributes and entities. And, in order to measure these semantic similarities, we used a thesaurus dictionary that proposed previous research. Finally, we presented effectiveness of the proposed methodology through some typical examples.
A Study on Evolution of Bus Priority System
Kim Sung-Deuk ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 465~473
DOI : 10.5394/KINPR.2005.29.5.465
In the analysis of the foreign cases on the use of Transit Signal Priority(TSP), the reduction in bus travel time ranged from 6 to
. This study demonstrates how TSP can be applied to Ulsan Metropolitan City. TSP techniques were used on the bus routes that run eastward for 4.07 kilometers along Munsoo-Ro, a major artery in the most congested part of the city. The simulation was performed on one hour of peak traffic time, using the two TSP strategies of Early Green and Extended Green. The use of the Early Green strategy resulted in an average decrease in travel time ranging from 18.1 to
and an increase in average travel speed ranging from 30.9 to
. The Extended Green strategy resulted in an average decrease in travel time ranging from 18.1 to
and an increase in an average travel speed of approximately
. This study demonstrates that TSP is effective in decreasing travel time and increasing travel speed of the bus system in Korea.
Advanced Wastewater Treatment using Sequencing Batch Reactor on ship`s sewage
Park Sang-Ho ; Kim In-Soo ;
Journal of Navigation and Port Research, volume 29, issue 5, 2005, Pages 475~480
DOI : 10.5394/KINPR.2005.29.5.475
Lab scale experimental study was carried out for SBR process, to investigate the effects of influent ship sewage organic compound removal and Bacillus sp. state on design parameters. This process was able to remove nitrogen and phosphorus as well as organic matter efficiently. More than
of chemical oxygen demand(COD) were removed. In addition, about
of total nitrogen (T-N) was reduced. The total phosphorus(T-P) reduction averaged
. The performance load of SBR process was shown to be
. The pH was decreased from 8.1 to 7.0 within 30 min and increased to 7.3 at the end of anoxic stage, and these phenomena were explained. The sludge produced in the SBR process is characterized by low generation rate (about
) and excellent settleability. The number of Bacillus sp. in the SBR was
, indicating that Bacillus sp. was a predominant species in the reactor.