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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
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Study for Optimal Hull Form Design of a High Speed Ro-Pax Ship on Wave-making Resistance Performance
Park, Dong-Woo ; Choi, Hee-Jong ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 787~793
DOI : 10.5394/KINPR.2012.36.10.787
A hull form design technique to enhance the wave-making resistance performance for a medium size high speed Ro-Pax ship was studied introducing an optimization method and an automatic hull form modification method. SQP(sequential quadratic programming) was applied as the optimization algorithm and the geometry of hull surface was represented and modified using the NURBS(Non-Uniform Rational B-Spline). The wave-making resistance performance as an objective function in the optimization procedure was evaluated using the Rankine source panel method in which nonlinearity of the free surface boundary conditions and the trim and sinkage of the ship was fully taken into account. Using the Ro-Pax ship as a base hull, the hull-form optimization method was applied to obtain the hull shape that produced the lower wave-making resistance. To verify the validity of the hull-form optimization method, the numerical results was compared with the model test results.
Probability Based Risk Evaluation Techniques for the Small-Sized Sea Floater
Yim, Jeong-Bin ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 795~801
DOI : 10.5394/KINPR.2012.36.10.795
This paper describes theoretical approach methodology for the Probability based risk Evaluation Techniques (PET) to monitor the risk levels of small-sized sea floater as like a yacht pier. The risk decision-making process by risk criteria with five-step scales is the core concepts of PET. These five-step scales are calculated from cumulative probability distribution of response functions for the sea floater motions using closed-form expressions. In addition, The risk decision-making process of PET with the risk criteria is proposed in this work. To verify the usability of PET, simulation experiments are carried out using mimic signals with the electrical specifications of ADIS16405 sensor that is to be use as measurement tool for the floater motions. As results from experiments, the risk evaluation error by PET shows 0.38 levels in maximum 5.0 levels. These results clearly shown that the proposed PET can be use as the monitoring techniques.
A Study on the Improvement of Damage to Reefer Container Cargo
Park, Sang-Kab ; Park, Young-Gil ; Shin, Young-Ran ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 803~810
DOI : 10.5394/KINPR.2012.36.10.803
Since the introduction of reefer container for seaborne transportation, international trade of reefer products has increased continuously with the development of refrigerate technology, increased speed of the ship and change of consumption pattern. Reefer cargo is perishable and sensitive to temperature, humidity compared with general cargo and normally reefer cargo is more valuable than general cargo. Therefore it needs special care for its handling in transit including land and sea in order to prevent cargo damage. However, lots of claims relating to reefer cargo damage rise frequently in workplace. It may increase unnecessary logistic cost and time. The aim of this study is to improve and prevent damage to reefer container cargo in transit for the purpose of benefits to both merchants and carriers to save unnecessary logistic cost and time as well as to contribute to deliver the cargo more safely and efficiently to destination.
The Effect of Job Embeddedness on Seafarer's Turnover Intention
Kim, Jung-Man ; Lee, Do-Hwa ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 811~817
DOI : 10.5394/KINPR.2012.36.10.811
This study aims to empirically identify how job embeddedness which is consisted of links, fit, and sacrifice affects seafarers' turnover intention via organizational commitment. The results of covariance structure analysis on the questionnaire data collected from 362 seafarers are as follows. First, as job embeddedness increases, the seafarers' organizational commitment also increases. Second, organizational commitment seems to have negative relationship with seafarers' turnover intention at the marginally significant level, since links and fit have direct negative relationship with turnover intention.
A Study on the Navigational Competence of Junior Naval Officers
Choi, Chang-Mook ; Lim, Bong-Taek ; Ko, Kwang-Soob ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 819~824
DOI : 10.5394/KINPR.2012.36.10.819
In this paper, mandatory minimum requirements for certification of officers in charge of a navigational watch on ship by international convention on STCW (standards of training certification and watchkeeping for seafarers) were investigated. The training education and evaluation systems for navigational competence of Korean navy were compared and analyzed. As a result, we have confirmed that junior naval officers from Korean midshipmen had the navigational competence based on the STCW convention by analyzing the courses of Korea naval academy, midshipmen life, training exercise systems, and so on. OCS and NROTC provided a curriculum that did not quite meet the standard of the STCW convention. However, it was sufficient for nurturing basic abilities for navigation safety.
Generation of Grid Maps of GPS Signal Delays in the Troposphere and Analysis of Relative Point Positioning Accuracy Enhancement
Kim, Dusik ; Won, Jihye ; Son, Eun-Seong ; Park, Kwan-Dong ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 825~832
DOI : 10.5394/KINPR.2012.36.10.825
GPS signal delay that caused by dry gases and water vapor in troposphere is a main error source of GPS point positioning and it must be eliminated for precise point positioning. In this paper, we implemented to generate tropospheric delay grid map over the Korean Peninsula based on post-processing method by using the GPS permanent station network in order to determine the availability of tropospheric delay generation algorithm. GIPSY 5.0 was used for GPS data process and nationwide AWS observation network was used to calculate the amount of dry delay and wet delay separately. As the result of grid map's accuracy analysis, the RMSE between grid map data and GPS site data was 0.7mm in ZHD, 7.6mm in ZWD and 8.5mm in ZTD. After grid map accuracy analysis, we applied the calculated tropospheric delay grid map to single frequency relative positioning algorithm and analyzed the positioning accuracy enhancement. As the result, positioning accuracy was improved up to 36% in case of relative positioning of Suwon(SUWN) and Mokpo(MKPO), that the baseline distance is about 297km.
A Super-resolution TDOA estimator using Matrix Pencil Method
Ko, Jae Young ; Cho, Deuk Jae ; Lee, Sang Jeong ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 833~838
DOI : 10.5394/KINPR.2012.36.10.833
TDOA which is one of the position estimation methods is used on indoor positioning, jammer localization, rescue of life, etc. due to high accuracy and simple structure. This paper proposes the super-resolution TDOA estimator using MPM(Matrix Pencil Method). The proposed estimator has more accuracy and is applicable to narrowband signal compared with the conventional cross-correlation. Furthermore, its complexity is low because obtained data directly is used for construction of matrix unlike the MUSIC(Multiple Signal Classification) which is one of the well-known super-resolution estimator using covariance matrix. To validate the performance of proposed estimator, errors of estimation and computational burden is compared to MUSIC through software simulation.
Comparison of Load Ratio of Load-cell type Anemometer with Windswept Shape Variation
Kim, Tae-Hyeong ; Han, Dong-Seop ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 839~844
DOI : 10.5394/KINPR.2012.36.10.839
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. According to previous research, the load ratio between two adjacent windswept with respect to the wind direction has unstable value due to vortex around windswept. This causes the result that increases an error on the wind direction. In this study we compared and analyzed the difference between the load ratio with respect to three type windswept shapes in order to suggest the proper windswept shape to reduce this error. The computational fluid flow analysis is carried out with ANSYS CFX to analyze the load ratio between three windswept shapes. Wind direction was adopted as the design variable, and selected 9 wind direction conditions from
interval for computational fluid flow analysis.
A Study on layered Space Time Trellis codes for MIMO system based on Iterative Decoding Algorithm
Park, Tae-Doo ; Jung, Ji-Won ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 845~849
DOI : 10.5394/KINPR.2012.36.10.845
The next-generation wireless communication requires fast transmission speeds with various services and high reliability. In order to satisfy these needs we study MIMO system used layered space time coded system (LST) combining space time trellis codes (STTC) with turbo codes. In LST, two codes that are inner and outer codes are concatenated in the serial fashion. The inner codes are turbo Pi codes suggested in DVB-RCS NG system, and outer codes are STTC codes proposed by Blum. The interleaver technique is used to efficiently combine two codes. And we proposed and simulated that a full iteration method between turbo decoder and BCJR decoder to improve the performance instead of only processing inner-iteration turbo decoder. The simulation results of proposed effective layered method show improving BER performance about 1.3~1.5dB than conventional one.
A Study on the Improvement of Salvage Procedures through the Collision Accident of Ships
Jung, Chang-Hyun ; Nam, Taek-Kun ; Jeong, Jung-Sik ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 851~856
DOI : 10.5394/KINPR.2012.36.10.851
There has been increasing the possibility of occurring the marine accident and become bigger the extent of damage with the growing number and high speed of ships. Also, there were tremendous loss of lives and properties in accidents of Hebei spirit in 2007 and Cheon Ahan war ship in 2010 with the insufficient salvage response and the lack of emergency response systems. When a ship has suffered an incident, the best way of preventing damage or pollution from its progressive deterioration would be to providing a place of refuge and to repair the damage rapidly. Therefore, it was examined the recent collision accident broken out near the Nam-Hae, and then suggested that it was necessary to be improved of the domestic salvage systems. It requires the procedures of providing a place of refuge, and the towing support system which make the damaged ship moved to the safe area, and joining of the ISU.
A Study on the Development of the Response Resource Model of Hazardous and Noxious Substances Based on the Risks of Marine Accidents in Korea
Lee, Eun-Bang ; Yun, Jong-Hwui ; Chung, Sang-Tae ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 857~864
DOI : 10.5394/KINPR.2012.36.10.857
Reviewing the statistics of harbor shipment of hazardous and noxious substance and the past spill accidents of HNS enabled us to assess the potential risks of transportation of HNS through the major harbors in Korea. Ulsan, Yeosu, Daesan port are relatively evaluated high risk in fire, health and environment disaster. Through the analysis of domestic preparedness to HNS accidents, the supplement of expertise resource to respond the vulnerability of the explosion, the fire and the physiological hazard, is required. Based on this risk assessment and review of the advanced case of Japan in building up HNS response system, a resource model at a national level was proposed which differentiates the sea areas for the proper allocation of resources to respond effectively to HNS accidents in the future.
Study on the estimation of the cylinder displacement of an underwater robot for harbor construction using a pressure sensor
Kim, Chi-Hyo ; Kim, Tae-Sung ; Lee, Min-Ki ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 865~871
DOI : 10.5394/KINPR.2012.36.10.865
This paper presents an observer to estimate the displacement of hydraulic cylinders of an underwater robot for harbour construction using a pressure sensor. In harbour constructing, we place heavy armour stones weighing over 2~3 tons on the surface of the bank to protect it from storming wave. This work typically done by a diver is difficult and dangerous so that we have developed Stone Diver which is the underwater robot for harbour construction. The robot needs a displacement sensors to control the position of hydraulic cylinders. The position sensors mounted outside the cylinders cause poor durability in construction site where shock and dust usually occur. However, the pressure sensor mounted inside a waterproof box improves the durability. Based on the dynamic parameters and the pressures in the cylinder, the observer estimates the cylinder's position. This paper presents the positional accuracy of the pressure based observer and the performance of the underwater robot to assemble the armour stones.
A Case Study on the Application of Modular System to the Superstructure of Floating Architecture in Europe
Song, Seog-Ki ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 873~881
DOI : 10.5394/KINPR.2012.36.10.873
This study is about the case study on the application of modular system to the superstructure of floating architecture in Europe. There are many restraints in the onsite construction of floating architecture. Then, various industrialized construction methods are needed to reduce the portion of the onsite construction in floating architecture. Among the various industrialized construction methods, the modular system can be more suitable for floating architecture. At this background, this study analysed the European cases of the application of modular system and classified the types of applied modular system. As a result, this study could classify the three types of modular system, such as, building unit modular, space unit modular and planning concept modular, and define the characteristics of three types by comparing with each other.
Recent Development in Technologies for Short Sea Shipping and its Implications
Seo, Dae-Won ; Ko, Jung-O ; Lee, Seung-Hee ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 883~888
DOI : 10.5394/KINPR.2012.36.10.883
Recently, the logistics industry in Asia is growing rapidly mostly with Chinese economic development. A variety of studies have been carried out to reduce the logistic cost under the situation that the global freight traffic continues to increasing. The Short Sea Shipping(SSS) system, a multi modal transport system centered around coastal shipping to realize high value-added logistics, achieved considerable success in EU. To implement the SSS system in Korea, it is necessary to develop the various essential technologies related to development of efficient ships and port facilities, including equipment for loading and unloading containers, operating and managing systems for freight terminals and technologies for tracking and securing containers. The present paper focuses on the survey of the current essential technologies available for implementation of the SSS system and suggests the direction of future development in the technologies.
Alternatives for Entering into the Chinese Market by Smaller-Sized Korean Logistics Enterprises
Cho, Sam-Hyun ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 889~893
DOI : 10.5394/KINPR.2012.36.10.889
The growth of Chinese logistics market has brought many logistics enterprises enter into the chinese market. The purpose of this study is to suggest some alternatives for activating enter into chinese market for smaller-sized korean logistics enterprise. First of all, in order to achieve such a purpose, factors for activation through literature survey and previous studies are analyzed. After that, questionnaire survey are carried out. Also factor analysis and reliability test based on the questionnaire results are performed. Main findings are suggested as followings. First, in order to activate entering the chinese market, it is drawn out that possessing of logistics infrastructure and understanding of culture of chinese relationship are most important. Second, market information and reform of management system, inspection and customs clearance are suggested as less important.
A Study on Stabilizing Container Terminal Market in Busan Port
Ryoo, Dong-Keun ; Choi, Jin-Yi ; Kim, Tae-Goun ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 895~904
DOI : 10.5394/KINPR.2012.36.10.895
Today, the competition for hub-port is getting fierce and the shipping liners have enjoyed the increased bargaining power over the terminal operators through the mergers & acquisitions (M&A) and strategic alliances. This result leads the competition among terminal operators to attract liner companies and cargoes in their terminals. In demand side, however, there is a limited container cargo volume to handle because of a steady growth of cargo traffic. While, in supply side, continuous development of port terminals increased more competition among ports or terminals for cargoes. In particular the terminal operating market of Busan port is distorted because of the cargo competition between Busan North-port and Newport. The main purpose of this study is to suggest the stabilization measures of container terminal operating market in Busan port through analysis of the terminal operation market structures and market survey analysis method. For stabilizing the container terminal market, this study suggests the improvement of the legal and institutional system such as improvement in determining and reporting system of stevedoring tariff, establishment of fair competition rules etc., the introduction of port pooling system and adoption of volume-linked terminal lease system with cargo volume ceiling system for each terminal operator.
Forecasting and Suggesting the Activation Strategies for Sea & Air Transportation between Korea and China
Jung, Hyun-Jae ; Jeon, Jun-Woo ; Yeo, Gi-Tae ; Yang, Chang-Ho ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 905~910
DOI : 10.5394/KINPR.2012.36.10.905
In early 1990s, the Sea & Air Transport Cargoes (SATC) was increased annually with more than 50% rate due to the rising trade between Korea and China. However, after that, the increasing rate of the SATC was slowdown from the late 1990s, furthermore, recently it became sluggish and declined. This phenomenon is totally different compared to the skyrocketing trade volumes between two countries. In this respect, to forecast the SATC, draw out the factors for activation, and calculate the weight of priority of these factors are urgently needed. To achieve the research objectives, the ARIMA and Fuzzy-AHP were used as research methodology. The estimated volume of SATC using the data from year 2007 to 2012 on the ARIMA model, will be reached approximately 33,000 tons in year 2015. In the mean time, For drawing out and weighing the activation factors for SATC, the Fuzzy-AHP was adopted. As a result, 'Sea & Air transportation-related information system policies' is the most important factor among the principle criteria, and 'the construction of consolidation logistics center' is the most important factor among the 12 sub-principle criteria.
A Study on the Policy for Introduction of WIG Craft into Coastal Passenger Service
Kim, Jae-Bong ; Yi, Hong-Won ; Oh, Yong-Sik ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 911~916
DOI : 10.5394/KINPR.2012.36.10.911
The purpose of this study is to review and suggest coastal shipping policies for introduction of WIG craft into domenstic passenger shipping market. Two Korean companies are leading in the development of WIG craft as an innovative sea transportation vehicle, and it is awaiting for commercialization. WIG craft is expected to be commercialized from coastal passenger market and we used AHP method to investigate the major factors and its' priority for smooth market entry. The results shows that priorities are on the WIG craft legislation, dock installation and operation, port state control, and pilot hiring and training, craft maintenance, and ship's certification in order.
The Reasons and Alternatives of Integrated Ocean Administrative System in Korea
Kang, Yunho ; Choi, Sung-Doo ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 917~924
DOI : 10.5394/KINPR.2012.36.10.917
The paper analyzed the logical and empirical grounds for integrated ocean administrative system and conducted comparative analysis of the ocean administrative systems of a few major foreign countries. Also the paper suggested the alternative systems of integrated ocean administration, based on the analyses. The analyses indicated that integrated coastal and ocean management, synergy effects of integration, and people's support could be the grounds for the integrated ocean administrative system. They also indicated that nowadays, major foreign ocean countries are oriented to integrated ocean administrative systems. The paper suggested the following three alternatives of integrated ocean administrative system: i) the creation of a new ministry, ii) the creation of an interministerial and intergovernmental coordinating committee, iii) the naming of a lead ministry.
Study on Maritime Policemen's Cognition about Proper Manpower Distribution: Focused on Workers of South Regional Headquarters, Korea Coast Guard
Kim, Sang-Goo ;
Journal of Navigation and Port Research, volume 36, issue 10, 2012, Pages 925~931
DOI : 10.5394/KINPR.2012.36.10.925
The purpose of this study: firstly, investigate cognition of affiliated members about manpower distribution of the South Regional Headquarters Korea Coast Guard(SRH-KCG) and danweis. Secondly, seek ways to reasonable manpower distribution of SRH-KCG and danweis. And this study's research subjects are five coast guards(Busan coast guard, Tongyeong coast guard, Yeosu coast guard, Jeju coast guard, Seogwipo coast guard) belonged to SRH-KCG. The results of this study: firstly, 56.7% of affiliated members approved the need to organizational diagnosis. Secondly, must manpower loading in order of Busan coast guard Tongyeong coast guard Jeju coast guard. Thirdly, must manpower loading in order of maritime safety division the security division criminal investigation divition.