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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
Selecting the target year
A Study on the Use and Satisfaction of the Shipping Companies' Welfare Program by the Characteristics of Crew's Demography and Working Condition on Board
Lee, Hee-Sang ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 149~155
DOI : 10.5394/KINPR.2012.36.3.149
This study primarily analyzed the use of shipping companies' welfare program by the characteristics of crew's demography and working condition on board, and next examined the effect of the satisfaction to the program on the organizational commitment and job satisfaction to the companies, in order to survey the shipping companies' welfare reality which has performed an influential role to meet the various welfare needs of personal crew. According to the findings in the recent survey of 459 seamen on board, there are differences among the use of the program by crew's the tolerance to work on board and personal characteristics, for example, age, marriage, position, period on board, and years of service. Moreover, the study verified the fact that the higher satisfaction to the use of those program, the higher organizational commitment and job satisfaction of crew.
A Study on the Resistance Characteristics for Planing Craft with Air Injection at the Bottom
Park, Chung-Hwan ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 157~162
DOI : 10.5394/KINPR.2012.36.3.157
A planing craft is designed specifically to achieve comparatively high speed on the surface of the water. The frictional resistance of planing craft can be reduced further by injecting air to the craft's bottom. In this paper, the resistance characteristics of high speed planing crafts with & without air injection at the bottom were compared by sea model-test method. As a result, we conformed that planing craft with air injection has much greater the effect of resistance reduction.
Damage Detection in Floating Structure Using Static Strain Data
Park, Soo-Yong ; Jeon, Yong-Hwan ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 163~168
DOI : 10.5394/KINPR.2012.36.3.163
Recently, people's desire for the waterfront space has been increasing, and more people want to spend their leisure time close to the water. This paper proposes a damage detection technique using the static strain for the floating structure. An existing damage index, in which the modal strain energy was utilized to identify possible location of damage, is expanded to apply the static strain. The new damage index is expressed in terms of the static strains of undamaged and damaged structures. After calculating damage index, the possible damage locations in the structure are determined by the pattern recognition technique. The accuracy and feasibility of the proposed method is demonstrated by using experimental strain data from a scale model of floating structure.
A Study on the Equalization for Low Power Underwater Acoustic Communication
Lee, Tae-Jin ; Kim, Ki-Man ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 169~173
DOI : 10.5394/KINPR.2012.36.3.169
In this paper, we propose an equalizer to minimize the inter-symbol interference when PSSK(Phase Silence Shift Keying) technique is applied to the low power underwater acoustic communication. PSSK is a QPSK(Quadrature Phase Shift Keying) modulation combined with PPM(Pulse Position Modulation), and it was proposed for low power communication. However, it has poor performance due to delay spread of underwater channel. In this paper, we propose a decision feedback equalizer to minimize the error in PSSK receiver. The sea trial was performed to evaluate the performance of the proposed method. In the result, the BER of PSSK was
before the equalizer was applied, but the BER of PSSK was
after the proposed equalizer was applied.
Analysis of Semi-Rigid Connections on 3D Floating Structures
Park, Jong-Seo ; Song, Hwa-Cheol ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 175~180
DOI : 10.5394/KINPR.2012.36.3.175
The shape of floating superstructure is the same as other buildings, but the foundation is based not on land but on a floating body. Unlike inland structures, they are largely influenced by the wave load. Deformation of the floating pontoon due to the wave loads affects the connection, which in turn causes problems related to the habitability and safety to the superstructure users. Accordingly, this study conducted elastic analysis regarding rigid connection and semi-rigid connection by the integration analysis that combined together the superstructure and pontoon of the 3-D floating structure. Moreover, this study investigated the results of the separation analysis excluding pontoon and the integration analysis. In addition, elasticity analysis was used to divide up the wave loads cases, and to classify the moment and displacement of the structure depending on connection following the changes in the wave loads.
Nonlinear Compression Characteristics of Highly Plastic Clays and Silts of Korea South Coast
Hong, Seok-Woo ; Im, Jong-Chul ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 181~187
DOI : 10.5394/KINPR.2012.36.3.181
Highly plastic clays in their normally consolidated states are not always linear but are concave downwards. Thus their compression index deceases with the increase of consolidation pressure. The
curves of plastic or non-plastic silty clays are not linear but are convex upwards. In this paper, consolidation tests were conducted with several undisturbed field soils of Korea south coast and their
plots are not always linear. In case of using Butterfield's method(liquid limit 50~100%),
plots are linear. But some undisturbed samples which have void ratio over 2.24, liquid limit over 100% and plasticity index over 60% are not linear. In results of consolidation tests with remolded samples which contain silt(fly ash) contents of 90% has compression index increasing with the increase in consolidation pressure.
Planning Guidelines for the Superstructure of Floating Architecture
Ko, Min-Chul ; Song, Seog-Ki ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 189~196
DOI : 10.5394/KINPR.2012.36.3.189
Recently constructed several floating buildings, in Korea, provoked the discussion about the activation of floating architecture. But, there is no guideline for the planning of floating architecture in Korea. This study aims to propose the framework of planning guidelines for the superstructure of floating architecture. For the purpose, collected various exiting guidelines related to floating architecture, and then analysed the structure and components of those guidelines. As a result of analysis, many components, could be used as references, are extracted. After the classification of the components into several categories, then, compared the content of components, derived from different guidelines, in same category. Based on the former analysis and comparison, proposed the framework of planning guidelines for the superstructure of floating architecture, consist of various set of components.
Strength of Joint in Floating Structures Constructed with Precast Concrete Modules
Yang, In-Hwan ; Kim, Kyung-Cheol ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 197~204
DOI : 10.5394/KINPR.2012.36.3.197
The behavior of floating structures constructed with precast concrete modules is dependent of the behavior of joints between the concrete modules. To accurately predict the floating structure response under the ultimate loading, knowledge of joint behavior is essential. This study aims to investigate the structural behavior of concrete module joints under various configuration of joint and confining stress levels. The shear behavior, shear capacity and crack patterns of shear keys in concrete module have been studied. Test results indicated that the shear capacity of joints increased as shear key inclination increased. In addition, shear capacity of concrete module joint increased with the increase of confining stress levels. The test results were compared with the AASHTO design recommendations. The AASHTO design recommendations underestimated the shear strength of test specimens.
A Study on the Demand Estimation of the Crew in Domestic Coastal Shipping Industry
Park, Sung-Jin ; Pai, Hoo-Seok ; Shin, Yong-John ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 205~213
DOI : 10.5394/KINPR.2012.36.3.205
This study focused on the supply-demand and training system of the crew for domestic coastal shipping. First of all, it forecasted the prospect and effect in the future of the crew supply-demand through the analysis to the current situation of crew employment and the internal and external environment changes. Next, it suggested the specific role and alternatives of government, industry and educational institutions after the comparison and examination of the sailor policies among Korea and major shipping countries. In regard to the demand of crew manpower in coastal shipping, it figured out the bottoms and the current circumstances of sailors, and it could anticipate the future demand by the gradational approach. According to the findings, firstly the result of this simulation by the changes of the ship numbers demonstrated that the demand over the next 10 years will be 7,890~8,025 in the case of the growth 0.4%, and 7,894~8,063 in 0.5%. Secondly, assuming the growth 0.1~1%, the result illustrated that the demand will come to 7,879~8,258. This means the fact that the additional manpower has to be input to 20~430 annually from now on. To conclude, this study showed the more rational numbers about the supply-demand than the past researches and displayed the systematic approach to supply and train the crew in domestic coastal shipping.
Response Characteristics of the Steel Moment Resisting Frame According to the Stiffness Variation of Pontoo
Lee, Young-Wook ; Park, Jeong-Ah ; Chae, Ji-Yong ; Choi, Ji-Hun ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 215~223
DOI : 10.5394/KINPR.2012.36.3.215
To examine the interaction of the floating pontoon with a steel moment resisting frame, the static structural analysis is carried out, in which the pressure load are calculated from the forgoing fluid dynamic analysis, varying the period of wave from 3 to 15 second and for 3 cases of depth of pontoon, 1.5, 2.0, 2.5m. As results, it has shown that RAO-pitch has the linear relationship with the increase of moment of the frame and the curvature of pontoon is reversely proportional to the stiffness of pontoon. By synthesizing these results, an estimation method is proposed, which predicts the moment of frame of the different depth of pontoon based on the analysis result of an arbitrary depth of a floating pontoon. The estimation result shows considerably good agreement, compared with the analysis result.
Analysis method of the Superstructure on Floating Pontoon Considering the Construction Sequences
Lee, Young-Wook ; Chae, Ji-Yong ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 225~232
DOI : 10.5394/KINPR.2012.36.3.225
In this research, the influence of additional vertical deformation of floating pontoon when dead load of each story is loaded during construction was investigated. The analysis procedure is presented for considering the influence of the additional deformation to calculate the additional moment of super-frame. Following the procedure, an example building with 3 storied steel frame was analyzed. Analysis method that taking no account for deformation of pontoon to the modeling was underestimated by ignoring design load following deformation of vertical load. By operating the load at the same time, design load under the influence of large deflection of model which whole modeling of floating structure was overestimated. So analysis method of floating structure considering the construction sequences demonstrated the suitable method.
A Study on the Formation and Influencing Factors of Ocean Governance in Busan, the Ocean Capital of Korea: A New Guide to Conflict Resolution Among Busan Marine Stakeholders
Woo, Yang-Ho ; Kang, Yun-Ho ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 233~243
DOI : 10.5394/KINPR.2012.36.3.233
The purpose of this study was to confirm that the formation and influencing factors of ocean governance in Busan. Recently it has been observed that the concept of ocean governance increasingly popular in the field of maritime administration, as the concept helps us understand more comprehensively the new or emerging roles of the government and other stakeholders(private enterprise, citizen, etc) in a rapidly changing environments. Therefore, this study aims to investigate the status of ocean governance and draw alternatives in applying appropriate ocean governance structure of maritime administration in Busan. The result of this study shows that ocean governance level in Busan was not high in some factors such as participation, cooperation, collective decision making. This is caused by the lack of a ocean governance structure. Based on these significant research findings, theoretical and practical implications were discussed.
University Students' Awareness of the Changes in Mega Sports Events
Kim, Kyung-Ho ; Lee, Jae-Hyung ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 245~252
DOI : 10.5394/KINPR.2012.36.3.245
This research aims to observe the alteration of consciousness that the mega sports event reaches on the university students. In order to attain the purpose of this research, direct and indirect participants in the Daegu World Championship in Athletics, including 228 male and female university students, were surveyed. T-test analysis, one-way Anova analysis, and regression analysis were performed for data processing and the research conclusions are as follows. First and foremost, there is an attentive difference within the group in the degree of participant passion in terms of degree of participation, the advantage of perception, perceived expenses, support as well as sustainability. Additionally, the university students' attachment and the degree of participation did not appear to be high and the economical part was sensitively perceived when taking into consideration of the degree of participation, the advantage of perception, perceived expenses, support as well as sustainability. The competition support as well as its continuity appeared to positively support the opening. Furthermore, the degree of participation, the advantage of perception, perceived expenses, support as well as sustainability appeared to be higher for the group with participating experience compared with the group with no participating experience.
A Study on Present Condition and Spatial Organization of Domestic Marina Club to Design Leisure Floating Architecture
Pak, Sung-Sine ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 253~259
DOI : 10.5394/KINPR.2012.36.3.253
Marina and marina clubs are the essential structures to meet increasing marin tourism and marin leisure sports demand. According to the domestic situation, marina and marina clubs are divided into 6 types such as small sports type, small complex type, midium sports type, midium complex type, large sports type, large complex type. As a result of analysis of domestic three marina clubs, averagely marina facilities take 21% and commercial facilities take 79% of total space. In the short term, marina club should be designed focusing on complex program. Marina club will be for long-term transformed into marin leisure sports program. Additionally, it is certain that floating marina club is an architecture to have water-friendly space and to maximize marin tourism and marin leisure sports.
Factors Affecting the Information Security Awareness and Perceived Information Security Risk of Employees of Port Companies
Chang, Myung-Hee ; Kang, Da-Yeon ;
Journal of Navigation and Port Research, volume 36, issue 3, 2012, Pages 261~271
DOI : 10.5394/KINPR.2012.36.3.261
The purpose of the present study is to empirically examine factors that affect the information security awareness and perceived information security risk of employees of port companies. In particular, in order to identify factors that affect the perceived information security risks, we investigated the relation of assets, threats, and vulnerabilities to it, using the risk analysis methodology. With A total of 252 valid questionnaires, we also performed the structural equation modeling analysis using AMOS. It was found that first, there was no meaningful relationship between the information assets and the perceived information security risk in the case of employees of port companies. Second, threats and vulnerabilities turned out to have positive influences on the perceived information security risk. Finally, there was a positive relationship not only between the information security awareness and the information security education, but also between the information security awareness and the intention of information security. However, there was no meaningful relationship between the information security concern and the information security awareness.