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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 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 Study on the Institute Warranties in the Institute Time Clauses-Hulls 1/10/83
Park, Sang-Kab ; Kim, Jong-Rak ; Shin, Young-Ran ;
Journal of Navigation and Port Research, volume 36, issue 5, 2012, Pages 329~338
DOI : 10.5394/KINPR.2012.36.5.329
The Institute Time Clauses-Hulls 1/10/83 has been using widely with attachment and/or endorsement of the Institute Warranties 1/7/76 stipulating vessel`s trading limits. Taking into consideration of several changes and renewals on the contents of the Institute Time Clauses-Hulls for clarifying the clauses themselves with development on technology of vessel`s construction and navigational equipments up to the present, the clauses on the Institute Warranties 1/7/76 should have been changed and/or renewed. Moreover, the insured still has been burdening additional premium in vessel`s navigating and / or calling to the areas stipulated in the Institute Warranties 1/7/76 regardless of any changes of marine business environments. Thus, this study aims to analyze the Institute Warranties 1/7/76 as well as to suggest a reasonable level of additional premium for breach of Institute warranties through not only a comparative analysis between the Institute Warranties clauses and those of the corresponding Institute Warranties using in the Japanese Fire and Marine Insurance companies but also consideration of current circumstances on changes in climatic conditions, vessel design, navigation and communication requirements and capabilities.
Dynamic Modeling and Simulation of a Towing Rope using Multiple Finite Element Method
Yoon, Hyeon-Kyu ; Lee, Hong-Seok ; Park, Jong-Kyu ; Kim, Yeon-Gyu ;
Journal of Navigation and Port Research, volume 36, issue 5, 2012, Pages 339~347
DOI : 10.5394/KINPR.2012.36.5.339
After towing rope connecting a barge to a tug was subdivided into multiple finite elements, then those dynamic models was established using Newton`s second law and considering the external force and moment such as tension, drag, Coriolis force, gravity, buoyancy, and impact due to free surface acting on each element. While the previous research on the model of towing rope considered only translation, five-degree-of-freedom equations of motion except roll based on the body-fixed frame were established in this paper. All elements are connected by a spring and a damper, and the stiffness of the spring was set as the equivalent value of the real rope. In order to confirm the established multiple finite element model, various scenarios such as freely falling of towing rope in the air and above the free surface, accelerating of a tug which tows a barge connected by towing rope, and sinusoidal moving of a tug were set up and simulated. As the results, the trajectories of the tug, the barge, and the towing rope showed good tendencies to the ones of real expected situations.
A Study on the Ship`s ORC Power System using Seawater Temperature Difference
Oh, Cheol ; Song, Young-Uk ;
Journal of Navigation and Port Research, volume 36, issue 5, 2012, Pages 349~355
DOI : 10.5394/KINPR.2012.36.5.349
In this study, for the purpose of reduction of
gas emission and to increase recovery of waste heat from ships, the ORC(Organic Rankine Cycle) is investigated and offered for the conversion of temperature heat to electricity from waste heat energy from ships. Simulation is performed with waste heat from the exhaust gasse which is relatively high temperature and cooling sea water which is relatively low temperature from ships. The result shows that 1,000kW power generation is available from exhaust gas and 600kW power generation is available from sea water cooling system. Different fluid is used for simulation of the ORC system with variable temperature and flow condition and efficiency of system and output power is compared.
Load Ratio between Two Adjacent Wings of Load Cell Type Anemometer according to Wind Direction
Han, Dong-Seop ;
Journal of Navigation and Port Research, volume 36, issue 5, 2012, Pages 357~361
DOI : 10.5394/KINPR.2012.36.5.357
Anemometer is a meteorological instrument that measures wind direction and wind speed in real time, and is mounted to the cranes that are used at ports, shipbuilding yards, off-shore structure, or construction sites that are influenced by wind, and it is used in conjunction with the safety system. Load cell-type anemometer measures the wind direction through the ratio of load between 4 positions by mounting the thin plate to 4 load cells, and measures wind velocity through the summation of loads. In this study, we compared and analyzed the results in the theoretic approach, analytic approach and experimental approach to derive the correlation between load ratio and wind direction. Wind direction was selected as the design variable, and selected 9 wind direction conditions from
space for analysis, and 10 wind direction conditions with
space for experiment.
Refactoring Effectiveness Analysis for Software Quality Enhancement : using AIS Mediation Server Program
Lee, Seo-Jeong ; Lee, Jae-Wook ; Hwang, Hoon-Kyu ; Lee, Jang-Se ;
Journal of Navigation and Port Research, volume 36, issue 5, 2012, Pages 363~370
DOI : 10.5394/KINPR.2012.36.5.363
Recently, International Maritime Organization has been developing e-navigation implementation strategy plan, which is focused on various services for vessel safety navigation. Then, different kinds of software will be developed in maritime area and with this, the quality issues are to be expected becoming more important. In this paper, we adopt software refactoring techniques to reduce the complexity of structure on source code level. It makes software program more effective to understand and modify, without any change of outward behavior. The existing AIS broadcast server program is used as an example for our trial, and calculating coupling and cohesion metric are introduced to analyze the refactoring effect, taking account of the maintainability of IEC/ISO9126 software quality standards.
A Study on the Timing Recovery using Peak Detector in Underwater Acoustic Communication
Han, Min-Su ; Kim, Ki-Man ;
Journal of Navigation and Port Research, volume 36, issue 5, 2012, Pages 371~378
DOI : 10.5394/KINPR.2012.36.5.371
This paper presents a timing recovery method using Gardner TED (Timing Error Detector) with a Peak Detector using Parabola Peak Interpolation in underwater acoustic communication. This method will have an eye to improve phase converge speed of timing recovery and reduced amount of Tx data. The OQPSK(Offset Quadrature Phase Shift Keying) modulation technique was considered. The proposed algorithm has faster recovery speed and more accurate than Gardner TED because the sampling values in the proposed algorithm are moved persistingly to maximum or minimum point using parabolic peak interpolation. when simulation performed using Preposed method, it improved BER (Bit Error Rate) performance about 23% And to evaluate the performances of the proposed algorithm the sea trial was performed in the Korean East Sea. And distance of a transmitter-receiver is 3 km each other. As a result, the proposed algorithm outperforms better BER performance about 20% of timing recovery than the Gardner method. Also Proposed method improved converge speed of timing recovery about 1.4 times better than Gardner method.
A Study on the Robust Stability and Stabilization Problem for Marine Vessel
Kim, Young-Bok ; Cho, Kwang-Hwan ;
Journal of Navigation and Port Research, volume 36, issue 5, 2012, Pages 379~385
DOI : 10.5394/KINPR.2012.36.5.379
In this paper, the stability and stabilization problems for marine vessels including surface and underwater vehicles are described. In the marine vessels, there are many and strong nonlinear parameters. These give hard design process and difficulties to us. In this article, at first we make a descriptor system representation as a controlled system to preserve the physical parameters of the system as it is. And we propose a new stability and stabilizability conditions based on the quadratic stabilization approach which gives a solution for the unreasonable problems produced by added mass. That is, the proposed conditions are not interfered with the nonsymmetric matrix constraint. And the stability condition is given by an matrix inequality such that it makes us to obtain a solution easily for something.
Automated Stacking Crane Dispatching Strategy in a Container Terminal using Genetic Algorithm
Wu, Jiemin ; Yang, Young-Jee ; Choe, Ri ; Ryu, Kwang-Ryel ;
Journal of Navigation and Port Research, volume 36, issue 5, 2012, Pages 387~394
DOI : 10.5394/KINPR.2012.36.5.387
In an automated container terminal, automated stacking cranes(ASCs) take charge of handling of containers in a block of the stacking yard. This paper proposes a multi-criteria strategy to solve the problem of job dispatching of twin ASCs which are identical to each another in size and specification. To consider terminal situation from different angles, the proposed method evaluates candidate jobs through various factors and it dispatches the best score job to a crane by doing a weighted sum of the evaluated values. In this paper, we derive the criteria for job dispatching strategy, and we propose a genetic algorithm to optimize weights for aggregating evaluated results. Experimental results are shown that it is suitable for real time terminal with lower computational cost and the strategy using various criteria improves the efficiency of the container terminal.
Characteristics of River Sand Soil Parameter for Single Work-Hardening Constitutive Model to Stress Path
Lee, Jong-Cheon ; Cho, Won-Beom ;
Journal of Navigation and Port Research, volume 36, issue 5, 2012, Pages 395~400
DOI : 10.5394/KINPR.2012.36.5.395
The stress-strain relationship of soil is dependent on a number of factors such as soil type, density, stress level and stress path. Th accurate stress-stain relationship can be predict using a constitutive model incorporated all influencing factors. In this study, an isotropic compression-expansion test and a series of drained conventional triaxial tests with several stress paths were performed on Baekma river sand to investigate parameters characteristics of Lade`s single work hardening model depending on the stress path.. Based on test results, the parameters of yield function (h,
) are not much influenced by stress level and stress path, the these parameters do affect a little bit of stress-strain behavior. The parameters h and
are closely related to failure criterion
, they can be replaced by failure criterion parament. We also observed that predicted values from the Lade`s single hardening constitutive model are well matched with the observed data.
Analyses of Consumer Preferences and Perceptions Regarding Activation of Yacht Tourism Industry
Cho, Woo-Jeong ;
Journal of Navigation and Port Research, volume 36, issue 5, 2012, Pages 401~407
DOI : 10.5394/KINPR.2012.36.5.401
The purpose of this study was to examine the preferences to yacht tourism and perceptions to importance of yacht tourism industry`s activation strategies from consumers perspectives. In order to such a purpose, this study employed survey methodology with a total of 300 visitors to yacht facility and beach located in B metropolitan city. With 265 usable questionnaires, data collected were analyzed using descriptive statistics such as frequency, percentage, mean and standard deviation. Accordingly, following findings were derived from current study. First, 32% of participants had yacht tourism experiences and more than 64% of them had willing to purchase yacht tourism products in the future, which indicates optimistic increases in yacht tourism demand. In addition, amount of willingness to pay for yacht tourism was less than 100 thousand Won per day. Second, the most preferred product was a yacht training and experience program, and preferred time for yacht tourism was weekend and or vacation with the period of one day or one night and two days. The main motivation was to spend leisure time and enjoyment with accompanying persons of family or friend members. Third, consumers` restriction factors included high expenditures, time consuming and lack of various yacht tourism products but their selection attributes included low expenditures, associated tourism products and quality of yacht tourism products. Finally, the most important activation strategies included the development of yacht tourism products, building yacht tourism conditions and establishing marketing strategies, but the least important activation strategies from consumers views included policies, experts and facilities.
A Case Study on a Way of Improving the Grand Alliance Container Service Route by Incorporating Dedicated Feeders - Focusing on `Far East-West Coast of North America` Route -
Kim, Woo-Jin ; Shin, Jeong-Hoon ; Chang, Myung-Hee ;
Journal of Navigation and Port Research, volume 36, issue 5, 2012, Pages 409~418
DOI : 10.5394/KINPR.2012.36.5.409
Amid global economic crisis and skyrocketing oil prices, container shipping companies have raised a sustained series of efforts to reduce vessel operating costs. Under these circumstances, the Grand Alliance has decided to install the dedicated feeder instead of additional vessels in the CCX(Central China Express) and the NCE(North China Express) route. In other words, a vessel in a trunk route is transshiped by a dedicated feeder vessel in Busan port that is a transshipment port, rather than calling at Northen China port. In this study, the actual operating data of Grand Alliance container services were analyzed to determine the economic effect of transshipment through a dedicated feeder service. In this way, the Grand Alliance are saving vessel operating expenses in `NCE` and `CCX` routes, making the slow steaming of vessels possible in these trunk routes.
The Effects and Subjects of Port Hinterland Policy in Korea
Kang, Yun-Ho ; Cho, Kyung-Woo ;
Journal of Navigation and Port Research, volume 36, issue 5, 2012, Pages 419~427
DOI : 10.5394/KINPR.2012.36.5.419
The paper evaluated the effects of port hinterlands and suggested the policies to improve them in Korea. The results of evaluation indicated that it is difficult for the effects to be evaluated so good. It seems that a lot of efforts should be made to make port hinterlands carry out their own functions well, in that, in particular, they have had so bad effects in carrying out such functions as production, international trade, and city. Policy actions were suggested including reduction of rent, strengthening international logistics networks, and governmental funding etc.