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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 38, Issue 6 - Dec 2014
Volume 38, Issue 5 - Oct 2014
Volume 38, Issue 4 - Aug 2014
Volume 38, Issue 3 - Jun 2014
Volume 38, Issue 2 - Apr 2014
Volume 38, Issue 1 - Feb 2014
Selecting the target year
A Study on the Initial Action of Navigators to Avoid Risk of Collision at Sea
Lee, Yun-Suk ; Park, Jun-Mo ; Lee, Young-Joong ;
Journal of Navigation and Port Research, volume 38, issue 4, 2014, Pages 327~333
DOI : 10.5394/KINPR.2014.38.4.327
The Convention on the international regulations for preventing collisions at sea, 1972(COLREGs) defines the collision avoidance principles and various navigation rules for the prevention of collision at sea. In particular, the initial responses to avoid risk of collision are mainly decided by navigation officer`s experience and subjective judgement. However, collision accidents could be effectively prevented if the minimum criteria of quantitative initial response are suggested to the junior officers and the cadets who have insufficient sea experience and navigation competency. This study reviewed the COLREGs terms related to the initial response and the existing papers concerned with risk assessment model. A questionnaire survey is also carried out for safe passing distance, degrees of alternating course and initial response distance to avoid collision in accordance with various encounter situations. Base on these results, we propose the proper minimum safe passing distance between the vessels, the initial response distance and required turning angles for alternation in each encounter situations. The suggested criteria of initial response will contribute to the prevention of collision at sea as well as the improvement of gradual navigation technology.
The Effects of Drag Reduction by Flow Control Grooves using CFD
Park, Dong-Woo ; Yoon, Hyun-Sik ; Koo, Bon-Guk ;
Journal of Navigation and Port Research, volume 38, issue 4, 2014, Pages 335~341
DOI : 10.5394/KINPR.2014.38.4.335
Faced with global agenda of greenhouse abatement program including regulations and
emission trading scheme, shipping companies are enforced to a high level of efficiency in fuel consumption. Accordingly shipbuilding companies worldwide are required to develop fuel-efficient ships which otherwise traditionally consume a great amount of fossil fuels. In this dissertation, relevant to the improvement of fuel efficiency for commercial ships, design methodology through the numerical simulations are intensively described. This work consists of derivation of effective hydrodynamic design practice based on the application of longitudinal grooves to effectively improve the pressure distribution around ship hull. The primary objective of the present study is to improve ship resistance performance using longitudinal grooves which originate from long strips on the abdomen of humpback whale. Several groove shapes have been extensively investigated and the proposed shape efficiently controlled the variation of pressure distributions acting on the hull surface.
A Heterogeneous-carrier Selectable Routing Scheme Based on Normalized Location and Transmission Characteristics (MCS-NLTC) for Multi-carrier MANETs at Sea
Son, Joo-Young ;
Journal of Navigation and Port Research, volume 38, issue 4, 2014, Pages 343~348
DOI : 10.5394/KINPR.2014.38.4.343
A routing scheme called MCS-NLTC using a self-configuration marine network model and the diversity and heterogeneity of broadband wireless access technologies is newly proposed. The MCS-NLTC algorithm selects optimal nodes and carriers for every hop in optimal routes based on not conventional hop counts but normalized distances to destination ships (location information of destination ships). Normalized transmission characteristics of applications and carriers are considered to get optimal routes as well. The location information enhances convergence speed to get destinations, which makes the route search time faster. Evaluated performances are compared with those of the schemes based on max-win (OMH-MW), and normalized transmission characteristics (MCS-NTC).
An Optimal Space Time Coding Algorithm with Zero Forcing Method in Underwater Channel
Kwon, Hae-Chan ; Park, Tae-Doo ; Chun, Seung-Yong ; Lee, Sang-Kook ; Jung, Ji-Won ;
Journal of Navigation and Port Research, volume 38, issue 4, 2014, Pages 349~356
DOI : 10.5394/KINPR.2014.38.4.349
In the underwater communication, the performance of system is reduced because of the inter-symbol interference occur by the multi-path. In the recent years, to deal with poor channel environment and improve the throughput, the efficient concatenated structure of equalization, channel codes and Space Time Codes has been studied as MIMO system in the underwater communication. Space Time Codes include Space Time Block Codes and Space Time Trellis Codes in underwater communication. Space Time Trellis Codes are optimum for equalization and channel codes among the Space Time Codes to apply in the MIMO environment. Therefore, in this paper, turbo pi codes are used for the outer code to efficiently transmit in the multi-path channel environment. The inner codes consist of Space Time Trellis Codes with transmission diversity and coding gain in the MIMO system. And Zero Forcing method is used to remove inter-symbol interference. Finally, the performance of this model is simulated in the underwater channel.
A Study on the Development of Designated Model of Places of Refuge location from IMO Recommendations
Lee, Chang-Hyun ; Park, Seong-Hyun ;
Journal of Navigation and Port Research, volume 38, issue 4, 2014, Pages 357~366
DOI : 10.5394/KINPR.2014.38.4.357
On December of 2003, IMO`s
Assembly discussed `Guidelines on places of refuge for ships in need of assistance` At the discussion, Res. A.949(23) has been selected to appoint recommended place of refuge for countries signatory to the IMO Convention. IMO defines "Places of Refuge" as a places where a ship in need of assistance can take action to enable it to stabilize its condition and reduce the hazards to navigation, and to protect human life and the environment. Appointing and managing a Place of refuge can be a delicate problem because of its close connection to each country`s coastal and environmental protection policies. However, in case of marine accident, the appointment or management of the place of refuge has a potential to avoid further damage and reduce to the minimum any environmental and estate losses. Currently a number of foreign countries, designated and operated a place of refuge. But, place of refuge selected method criteria were different by country and also does not have any standardized designating place of refuge model. Therefor, this study suggested the model of assigned places of refuge according to objective indication in order to assign reasonable and efficient places of refuge in domestic waters in the future by investigating and analyzing imported facts in considering the assignment of places of refuge in foreign countries and describing these imported data into quantitative value. In designating the model place of refuge, the final place of refuge location was presented by evaluating the probability of marine accidents, analyzing the location, and evaluating the supporting establishment.
Lifejcket-Integrated Antenna for Search and Rescue System
Lim, Ji-Hun ; Yang, Gyu-Sik ; Jung, Sung-Hun ; Park, Dong-Kook ;
Journal of Navigation and Port Research, volume 38, issue 4, 2014, Pages 367~371
DOI : 10.5394/KINPR.2014.38.4.367
When the crew or passengers fall into the water due to marine accident of vessel, it is very important to rescue them quickly. In the case of marine accidents, most people in distress have been wearing a lifejacket, so if the GPS and Cospas-Sarsat communication module will be integrated within the lifejacket, it is easy to rescue them. In this paper, development of the dual band lifejacket-integrated antenna for GPS and Cospas-Sarsat communication is discussed. The antenna with the FR-4 substrate of 0.2mm thickness for flexibility was designed that it can be fitted close to the shoulder of the life jacket and operate at 1.575GHz and 406MHz. The GPS communication antenna was implemented with a ring-slot antenna having a circular polarized characteristic and a meander type linear polarized antenna is used as Cospas-Sarsat communication. The two antennas are fed by a single microstrip line and an open stub is used to minimize the mutual interference between the two antennas. The performance of the fabricated antenna attached to the life vest is confirmed by the measurement of the return loss at GPS and Cospas-Sarsat frequency bands.
Method of Differential Corrections Using GPS/Galileo Pseudorange Measurement for DGNSS RSIM
Seo, Ki-Yeol ; Kim, Young-Ki ; Jang, Won-Seok ; Park, Sang-Hyun ;
Journal of Navigation and Port Research, volume 38, issue 4, 2014, Pages 373~378
DOI : 10.5394/KINPR.2014.38.4.373
In order to prepare for recapitalization of differential GNSS (DGNSS) reference station and integrity monitor (RSIM) due to GNSS diversification, this paper focuses on differential correction algorithm using GPS/Galileo pesudorange. The technical standards on operation and broadcast of DGNSS RSIM are described as operation of differential GPS (DGPS) RSIM for conversion of DGNSS RSIM. Usually, in order to get the differential corrections of GNSS pesudorange, the system must know the real positions of satellites and user. Therefore, for calculating the position of Galileo satellites correctly, using the equation for calculating the SV position in Galileo ICD (Interface Control Document), it estimates the SV position based on Ephemeris data obtained from user receiver, and calculates the clock offset of satellite and user receiver, system time offset between GPS and Galileo, then determines the pseudorange corrections of GPS/Galileo. Based on a platform for performance verification connected with GPS/Galileo integrated signal simulator, it compared the PRC (pseudorange correction) errors of GPS and Galileo, analyzed the position errors of DGPS, DGalileo, and DGPS/DGalileo respectively. The proposed method was evaluated according to PRC errors and position accuracy at the simulation platform. When using the DGPS/DGalileo corrections, this paper could confirm that the results met the performance requirements of the RTCM.
A Proposition on Reasonable Termination Procedure in Remaining-oil Recovery Work from a Sunken Tanker in Korean Territory
Kang, Kwang-Gu ; Shim, Yoo-Taek ; Kang, Sin-Young ;
Journal of Navigation and Port Research, volume 38, issue 4, 2014, Pages 379~384
DOI : 10.5394/KINPR.2014.38.4.379
In case of sunken tankers, remaining-oil recovery operation should be conducted due to possible oil spill accident. However, the deep sea operation make difficulties in checking the completion of remaining oil recovery process, therefore the work termination procedure is very important. In this paper, a reasonable work termination procedure through the comparison and analysis of two cases(Youil No.1 and Osung No.3, Kyung-Shin) which were performed in different method, using disparate equipment. By investigating previously applied methods and techniques, work speed, safety and expenses were compared. The proposed ending procedure of the remaining-oil recovery project is to recover the remaining oil from each cargo tanks and to clean up such tanks whilst an independent surveyor proceeds to a confirmation procedure whereby said surveyor checks out whether any remaining oil exists by putting a stick in each cleaned up tanks and opening up the hatch cover of the tanks or the top place of the tanks to confirm the cleanness of oil. Such procedure shall be done through discussion by the ordering party, contractor and the independent surveyor all together with a flexible application.
A Study on the Support Tool for Simulator Algorithm Development
Lee, Yeong-Ju ; Kim, Ah-Young ; Park, Se-Kil ; Oh, Jae-Yong ; Kim, Jeong-Soo ;
Journal of Navigation and Port Research, volume 38, issue 4, 2014, Pages 385~390
DOI : 10.5394/KINPR.2014.38.4.385
Simulator is composed of several devices that have a variety of forms and functions. These devices are connected to each other by a network intricately. For this reason, simulator development and maintenance process require a lot of time and money. In order to successfully develop the simulator, it is ideal that related professionals share the work and work together in parallel. However, development is carried out inefficiently, because task interdependence makes it difficult to work in parallel. In this paper, the developments of the simulator were classified into algorithm development and system development, and it was discussed how to lower the interdependence of these two tasks and support professionals. In particular, based on the requirements analysis of the domain experts responsible for the development of the algorithm, we designed the support tool for simulator development and proposed development process using this tool. We also introduced the concept of a DataSet in order to support algorithm development of domain experts and manage data flexibly. And we designed network architecture to enable flexible reconfiguration of simulator equipment. By using the tools to support the simulator development, domain experts are able to concentrate on algorithm development and it is expected to be effective collaboration. In addition, the development plan and management are expected to be easy because the development process is systematic and clearer.
Performance Verification of Psudolite-based Augmentation System Using RF signal logger and broadcaster
Han, Deok-Hwa ; Yun, Ho ; Kim, Chong-Won ; Kim, O-Jong ; Kee, Chang-Don ;
Journal of Navigation and Port Research, volume 38, issue 4, 2014, Pages 391~397
DOI : 10.5394/KINPR.2014.38.4.391
Wide Area Differential GNSS(WA-DGNSS) was developed in order to improve the accuracy and integrity performance of GNSS. In this paper, overall structure of Pseudolite-Based Augmentation System(PBAS) and experimental methods which enables the post-processing test with commercial receiver will be described. For generating augmenting message, GPS measurement collected from five NDGPS reference stations were processed by reference station S/W and master station S/W. The accuracy of augmenting message was tested by comparing SP3, IONEX data. In the test, RF signal of user was collected and correction data were generated. After that, RF signal was broadcasted with pseudolite signal. Test was conducted using three commercial receiver and the performance was compared with MSAS and standalone user. From the position output of each receiver, it was shown that improved position was obtained by applying augmenting message.
A Study on the Application of Transfer Equipment Pooling Systems for Enhancing Productivity at Container Terminals
Cha, Sang-Hyun ; Noh, Chang-Kyun ;
Journal of Navigation and Port Research, volume 38, issue 4, 2014, Pages 399~407
DOI : 10.5394/KINPR.2014.38.4.399
Due to the increase of container terminals, as the volume of terminals become distributed, the competition of preserving existing volume and inviting new volume are becoming fierce, and various ways for processing terminal volume and inviting volume are being sought. Container terminal efforts to maximize efficiency in order to improve the volume handling capability and productivity by both expansion of the latest equipment and development of the latest terminal system. There are a variety of factors that influence the improvement of productivity at container terminals. Among them, in the case of yard transfer equipment, if it were to convert from the method of a Yard Tractor(YT) being fixed allocated to a certain Gantry Cranes(GC) to a Pooling System that processes in a method that properly distributes and allocates a Yard Tractor(YT) to multiple Gantry Cranes(GC), the terminal productivity and the fusibility of YT may be increased. The KPI which is an indicator for the productivity at container terminals is GC productivity and since GC productivity cannot exceed the speed of physical GC operations, a Pooling System is applied to increase productivity which its meaning and effect is massive. Here in the Report, we produce the Pooling Algorithm system to improve the efficiency of the transported equipments in container terminal which is actually applying for this method and have compared Non pooling system with Pooling system in the fields. By introducing a transfer equipment pooling system and enhancing the productivity compared to other terminals, it may become an essential factor for increasing the continuous service quality and profitability in terms of terminal business.
Dilemma and Its Institutional Solutions in the Port ODA of Korea
Kim, Bo Young ; Kang, Yunho ;
Journal of Navigation and Port Research, volume 38, issue 4, 2014, Pages 409~419
DOI : 10.5394/KINPR.2014.38.4.409
In accordance with the global age, countries in the world try to dedicate to collaboration among them through ODA (Official Development Assistance), in order to solve the-rich-get-richer and the poor-get-poorer problems among countries, to develop the developing countries` economies, and to improve their level of social welfare. Also, Korea is so active in ODA as a member of OECD, even if it is in the initial process. Nowadays, in Korea, the importance of ODA in the field of port has been brought into relief. Accordingly, the paper intends to analyze the dilemma structure of port ODA from the perspectives both of new institutionalism and Samaritan`s dilemma game, and it tries to seek the improvements of ODA institutions to create effective outcomes based on the analysis. Through the analysis, dilemma structure was identified regarding the institutions of port ODA. And the results of the analysis suggested the improvements of port ODA institutions including strengthening of on-the-spot aid system, establishment of payoffs system for inducing recipient countries` efforts, and institutionalization of reliable threat. It would contribute to develop the theoretical model of ODA analysis and create effective outcomes of ODA in the field of ports.
Reflection Characteristics of Eco Block on Seabed
Kim, Jeong-Seok ; Lee, Joong-Woo ; Kang, Seok-Jin ; Lee, Yong-Hun ;
Journal of Navigation and Port Research, volume 38, issue 4, 2014, Pages 421~427
DOI : 10.5394/KINPR.2014.38.4.421
In order to protect coastal facilities mainly from wave and current actions, the self-locking eco blocks constituting elements of protecting shore structures against scouring were designed. These blocks are adapted to the sloping bottom, coastal dunes, and submerged coastal pipelines, counteracting the destructive and erosive impulse action. A series of laboratory experiments has been conducted to investigate the reflection of water waves over and against a train of protruded or submerged shore structures and compare the reflecting capabilities of incident waves including wave forces. In this study the hydraulic model experiment was conducted to identify the performance of newly designed water affinity eco blocks to keep the coast slope and bottom mound from scouring by reduction of the wave reflection and to convince stability of the block placement. Revised design of each block element was also tested for field conditions. From the result of experiments, the field applicability of the developed blocks and placement was discussed afterward.
Analytical Study of the Customer Satisfaction for Public Marina by application of the Designated Management System in Japan
Jung, Won-Jo ; Lee, Han-Seok ; Lee, Myung-Kwon ;
Journal of Navigation and Port Research, volume 38, issue 4, 2014, Pages 429~435
DOI : 10.5394/KINPR.2014.38.4.429
In general, Introducing of the Designated Manager System (DMS) of public facilities has been promoted as part of administrative reforms for planning improvement of service for customers by a private and budget cuts of operations management. DMS has begun to be introduced to the public marina facilities in earnest in 2006, it is evaluated positive about efficiency in terms of business(budget cuts). However, there is no discussion about efficiency (likes service satisfaction of client-side) from the marina whose major job is service. The primary purpose of this study is to clarify the benefits and challenges as a result of the Designated Manager System (DMS) launch implemented by local governments, following the relevant amendments to the Local Government Law. The second purpose is to clarify, from the viewpoint of users, what changes have taken place after the DMS launch, focusing on public marinas operated under the DMS. As for the primary purpose, the study is intended to clarify the economic benefits of the DMS and the significance of the DMS launch at a prefectural government level. This will help us assess whether it would be worthwhile to encourage private companies or non-profit organizations (NPO) to participate in the management and operation of public facilities under the DMS scheme. Most of the studies to date have examined the benefits of the DMS launch, focusing on the economic benefits for local governments. This study is intended to clarify the benefits and disadvantages to users of the DMS launch from the viewpoint of users.