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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society of Marine Environment & Safety
Journal Basic Information
Journal DOI :
The Korean Society of Marine Environment and safety
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Volume & Issues
Volume 18, Issue 6 - Dec 2012
Volume 18, Issue 5 - Oct 2012
Volume 18, Issue 4 - Aug 2012
Volume 18, Issue 3 - Jun 2012
Volume 18, Issue 2 - Apr 2012
Volume 18, Issue 1 - Feb 2012
Selecting the target year
Change in Fish Assemblage Inhabiting Around Dae Island in Gwangyang Bay, Korea
Kwak, Seok-Nam ; Huh, Sung-Hoi ; Kim, Ha-Won ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 175~184
DOI : 10.7837/kosomes.2012.18.3.175
Changes of fish assemblage inhabiting around Dae Island in Gwangyang Bay, Korea were investigated using a small beam trawl monthly from March 2009 to February 2010. These data were compared with those obtained in previous studies(1990~1991 and 1995~1996) at our study sites. A total of 8,133 fish belonging to 74 species in 38 families were collected. Leiognathus nuchalis, Argyrosomus argentatus, Acentrogobius pellidebilis, Sillago japonica, Apogon lineatus, Thryssa hamiltoni, Repomucenus richardsonii, Pholis nebulosa, Pleuronichthys cornutus, Hexagrammos otakii, and Limanda yokohamae dominated, and these were responsible for 89.5% and 58.9% in the number of individuals and in biomass, respectively. These were primarily small species or early juveniles of larger species. Seasonal variation in both species composition and abundance was large: the peak number of fish species occurred in May and October 2009, whilst both number of individuals and biomass were the highest in May 2009. Fish numbers as well as biomass was lowest in January and February 2010. Seasonal changes in the abundance of fishes corresponded with temperature. Compared with the previous studies, the total number of individuals and biomass per unit area(
) were higher, and the predominance of L. nuchalis occurred while abundances of Liparis tanakai were significant decreased. These results seemed to be change of species composition in fish assemblage which was due to variation of annual environmental characteristics in Gwangyang Bay.
Estimation of Stocking Density using Habitat Suitability Index and Ecological Indicator for Oyster Farms in Geoje-Hansan Bay
Cho, Yoon-Sik ; Lee, Won-Chan ; Hong, Sok-Jin ; Kim, Hyung-Chul ; Kim, Jeong-Bae ; Park, Jung-Hyun ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 185~191
DOI : 10.7837/kosomes.2012.18.3.185
Most of Korean farms have been developed in the semi-closed bay, and its position is very vulnerable to the coastal contamination due to the long term and the high density. So, mariculture management is very essential for the sustainable aquaculture. Some of the specific ways would be the assessment of the optimal stocking density for mariculture management zone and this has to consider both the suitable site selection and the assessment of ecological carrying capacity. Habitat suitability index(0.0 totally unsuitable habitat, 1.0 optimum habitat) and ecological indicator(Filtration pressure indicator) was used to assess the stocking density for oyster farms in Geoje-Hansan Bay. Geoje Bay showed the higher habitat suitability index value 0.75 than Hansan Bay 0.53, indicating that Geoje Bay is more suitable for oyster farming. Ecological indicator showed different stocking density according to the coastal characteristics in Geoje-Hansan Bay. Consequently, it is desirable that the stocking density in Geoje Bay should reduce average 40% and Hansan Bay, average 60% than present, in order to meet the ecological carrying capacity. The assessment of the stocking density could solve various problems such as the coastal contamination, environmental aggravation and the productivity decrease and this study could be a scientific basis to establish the policies for mariculture management.
Long Term Changes Pattern in Marine Ecosystem of Korean Waters
Rahman, S.M.M. ; Lee, Chung-Il ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 193~198
DOI : 10.7837/kosomes.2012.18.3.193
Long term changes in winter time(JFM) sea surface temperature(SST) and marine ecosystem of different Korean waters during last five to six decades were illustrated. Fishing intensity with climate-ocean variability(e.g. SST) have been increasing since 1970s in all of the Korean marine waters. Winter SST around Korean waters went to colder regime in early 1980s and after the late 1980s increased gradually. After 1988/89 CRS all of the waterbody started warmer regime and well coincided with the CRS phenomena. Large predatory, small pelagic and crustacean and mollusks abundance were well coincided by the warmer SST regime after 1988/89 CRS and changed the fishery from demersal fishery to pelagic fishery. Ecosystem parameter of Mean Trophic Level(MTL) showed continuous decreasing trend since mid of 1970s which was mostly affected by the increasing of lower trophic level species. Fishing in balance(FIB) index showed increasing pattern since early 1970s to the late of 1970s and from early 1980s it was almost stable until now. Finally wasp-waist population of anchovy and Japanese sardine have a greater impact to the whole MTL since early 1970s.
Damping of Water Waves over Permeable Bed of Finite Depth
Kim, Gun-Woo ; Lee, Myung-Eun ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 199~205
DOI : 10.7837/kosomes.2012.18.3.199
In this study, wave transformation by damping due to the permeable bed of finite depth is investigated. The relationship between wave damping rate and relative water depth are presented. The damping rate is used in the eigenfunction expansion method to calculate the wave dissipation over the permeable bed. For a permeable shoal, the eigenfunction expansion model result is compared with that of the integral equation method to show good agreement. The model is also used to examine the wave reflection over the permeable planar slope of various frequency. It has been found that in general relatively short waves are more influenced by the permeability of the permeable seabed than relatively long waves unless the water depth is so large that the influence of permeable bed on surface water waves disappears.
Key Recommendations for MPA Management in Korea
Chae, Dong-Ryul ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 207~212
DOI : 10.7837/kosomes.2012.18.3.207
The purpose of this paper is to overview Korean MPA, to figure out the problems of current system and to give policy suggestions for effective management for Korean MPAs. Results show that different types of MPAs are established based on different legislations but there is no effective control system for integrated management. In addition, Korean government can not use the function of MPAs due to the insufficient regulation for harmful activities within MPAs. Finally, this paper recommends four policy suggestions for effective management of Korean MPAs; legal requirements of MPA designation, establishment of national authority for MPA management, application of no-take MPAs for fisheries management and establishment of MPA network.
A Study on East Asian Regional Electronic Navigational Chart Coordinating Center Establishment Strategy
Kim, Ho-Yoon ; Oh, Se-Woong ; Shim, Woo-Sung ; Suh, Sang-Hyun ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 213~220
DOI : 10.7837/kosomes.2012.18.3.213
International Maritime Organization made International Convention for the Safety of Life at Sea to require all ships to carry official charts, both paper and electronic, and is especially encouraging the use of Electronic chart display and information system (ECDIS). Recently, the argument that all Electronic Charts(ENC) displayed in ECDIS should be distributed through Regional ENC Coordinating Center is being raised within the IHO. The use of ECDIS was generalized, but the existing two RENCs in Europe are thought to be not enough. Especially, East Asian region, due to its rapid growth in economy and marine traffic, RENC is found necessary. This research establishes the legitimacy and strategy of East Asian RENC by defining the roles of RENC based on the IMO ECDIS Mandatory Carriage Requirement and RENC operation status through suggesting a "Phase-In" RENC model, which was built upon the strategy of East Asian Hydrographic Commission(EAHC).
Experiment on Track-keeping Performance using Free Running Model Ship
Im, Nam-Kyun ; Tran, Van-Luong ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 221~226
DOI : 10.7837/kosomes.2012.18.3.221
This research presents an analysis of algorithm for ship track-keeping along a given trajectory. The maneuver of a free running model ship guiding through a simple path are presented. In order to solve the above problem, a desired trajectory is usually determined by GPS points in a pre-fixed place then these points are set in a pre-programmed navigation so that the ship would be automatically tracked. Proportional-Derivative(PD) control which is useful for fast response controllers was used in this program as a course keeping system. A high accuracy GPS receiver was installed on the model ship that could provide positions frequently, the system will compare and give out the remaining distance and heading to the target way-point. The results of ship auto track-keeping experiment will be explained in order to illustrate the adjustment in controlling parameters. These results can be utilized as a preliminary step to carry out the experiment of ship collision avoidance system and automatic berthing in the future.
A Study on the Marine Interests and Marine Force Theory
Yan, Tie-Yi ; Kim, Sang-Goo ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 227~233
DOI : 10.7837/kosomes.2012.18.3.227
The oceans are the largest body of water geographical unit in the earth. In accordance with the general said of the international law, countries on the international law must have four elements: 1) settled residents; 2) determined territory; 3) a certain degree of government organizations; 4) the sovereignty. The country's basic rights are: 1) the right to independence; 2) the right to equal; 3) the right to jurisdiction; 4) the right to self-protection. UNCLOS as the only one of the "Constitution of the Earth" on the earth, the implementation of its entry into force make about 1/3 of the world's oceans should be assigned to the coastal states, in the use and management of ocean gave the coastal states the center jurisdiction, the coastal states' jurisdiction sphere had been expanded, the power comparison among all countries in the world had new changes. The ocean territory, like the land territory, is the most major material condition of a country. The ocean's strategic status is extremely important, is the important stage of the international political, economic and military struggle, there are many disputes about the rights and interests, resources and the development and utilization on the oceans. To resolve these disputes is bound to depend on a strong comprehensive national strength, including politics, economy, science and technology, as well as the powerful marine force, in which maritime police plays an important role.
A Study on the Introduction Plan of the Places of Refuge in Domestic Areas based on the Analysis of Foreign Cases
Lee, Chang-Hyun ; Park, Sung-Hyeon ; Jeong, Jung-Sik ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 235~241
DOI : 10.7837/kosomes.2012.18.3.235
A huge marine accident causes a loss of valuable lives, property and the serious marine environment pollution. IMO adopted resolution A.949(23) to provide Places of Refuge(PoR) to 'Ship in need of assistance', which is to minimize the secondary environmental pollution caused by marine accidents. If the level of risk exceeds a certain range, it is necessary to be designated as Places of Refuge(PoR) after evaluation of potential risk, which is based on the database of several marine environmental factors. Also, it is necessary to develop skills about quantification/standardization of vessel traffic safety, complexity and risk. Because there is the close relation between the problem of designating Places of Refuge(PoR) and the policy of nation for protecting the natural environment of coastal state, it is important to prepare related legislation. In this paper, introduction of Places of Refuge(PoR) in domestic areas have been suggested based on the analysis of several foreign designating cases.
The Philippine Merchant Marine in Consonance with STCW 2010 Manila Amendments
Dimailig, Orlando S. ; Jeong, Jae-Yong ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 243~252
DOI : 10.7837/kosomes.2012.18.3.243
This paper reviews the implementation of the STCW 78/95 in the Philippine MET including the effects of the revised 2010 Manila Amendments. It discusses the country's maritime environment and the structures, quality of maritime education in the country and the effects on the maritime human resource. Among the various resolutions adopted at the conference, the standards of training and certifications, and promoting skills and competency will be more emphasized in this report. These will be compared with the existing curriculum mandated by CHED and upgrade STCW trainings advised by MTC for maritime institutions. A brief comparison and analysis with other Asian countries' maritime training shall be offered. The recommendation pinpoints to the weaknesses of the present maritime regimes in certification and evaluation of maritime institutions. It concludes with the need to have mutually acceptable evaluation standards in view of developing a competent human resource for the future.
A Study on the Measures of Seafarer Supply with Statistical Comparison of Maritime Graduates Career Path for the Republic of Korea and the Philippines
Barro, Ronald D.C. ; Han, Won-Hui ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 253~259
DOI : 10.7837/kosomes.2012.18.3.253
The projection on the demand for seafarers is seen to continue to rise in consonance with the world's fleet increasing tonnage. It is also expected that recurring officer shortages is paramount when global markets bounce off from the economic downturn it experienced for the last few years. In BIMCO/ISF(The Baltic and International Maritime Conference/International Shipping Federation) report for 2010, a continuous effort to produce competent seafarers should be adapted and as much as possible, reduce the wastage in the industry to address the looming scenario. The Republic of Korea, an OECD member, is a powerhouse in shipbuilding industry and has also had continued to show also an expanding trend in its fleet. On the other hand, the Philippines is still acknowledged as the main source of manpower for ocean-trading vessels. In this paper, a statistical comparison of maritime graduates' career path between the two countries is presented. In conclusion, it is suggested that a mutual co-operation between the Republic of Korea and the Philippines can be established with focusing on international maritime education and training collaboration.
A Study on RFID Enabled Logistics and Supply Chain Management
Boldbaatar, Tumenjargal ; Yoon, Dae-Gwun ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 261~266
DOI : 10.7837/kosomes.2012.18.3.261
This study provides for the enabling role of RFID technology in effecting supply chain management and logistics development. Furthermore, the findings of study reveal the recent application of RFID in international logistics and analyze the reason as the key factor of RFID widespread adoption and usage among suppliers.
A Study on the Pump Efficiency Measurement Using the Thermodynamic Method
Bae, Cherl-O ; Vuong, Duc-Phuc ; Lee, Hwi-Il ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 267~272
DOI : 10.7837/kosomes.2012.18.3.267
Carbon emission generated by energy issues is one of the major problems which all countries concern. The International Energy Agency recommends to improve 15-30[%] of energy efficiency than now. Government has pushed the domestic energy saving policies and incentives and penalties were also given in that direction. Pumps are widely used to transfer fluids and they consume at least 20[%] power of each nation. Their loss of energy is huge if they have been operated at low efficiency for long time. Low efficiency of these pumps is often due to incorrect design or degradation. Pump efficiency can be measured to estimate energy loss. If it is low, the pump may be repaired or replaced with new one. This paper introduces thermodynamic method to measure pump efficiency using only two kinds of sensors for temperature and pressure. It can calculate best efficiency point(BEP) of actual systems easily and fast. Its values were compared with the real performance curve provided by pump maker and we got almost similar performance curves from the repeated experiment.
The Welding Surface and Mechanical Characteristics in Friction Stir Welding for 5456-H116 Alloy
Kim, Seong-Jong ; Han, Min-Su ; Jang, Seok-Ki ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 273~278
DOI : 10.7837/kosomes.2012.18.3.273
The use of Al alloys instead of fiber-reinforced plastic(FRP) in ship construction has increased because of the advantages of Al-alloy ships, including high speed, increased load capacity, and ease of recycling. This paper describes the effects of probe diameter on the optimum friction stir welding conditions of 5456-H116 alloy for leisure ship, measured by a tensile test. In friction stir welding using a probe diameter of 5 mm under various travel and rotation speed conditions, the best performance was achieved with a travel speed of 61 mm/min. Using a probe diameter of 6 mm, rotation speeds of 170-210 rpm, and a travel speed of 15 mm/min produced a rough surface and voids because of insufficient heat input produced by the low rotation speed. At 500-800 rpm, chips were observed, although there were no voids, and the weld surface was excellent. However, at 1100-2500 rpm, many chips were produced due to excessive heat input. Heat effects were very evident on the bottom. For a travel speed of 15 mm/min, heat input caused by friction increased as the rotation speed increased. The mechanical characteristics were degraded by accelerated softening due to increasing heat input.
A Study of Liquid Nitrogen Inert Gas System for LNGC Diesel Engine Crank Chamber
Choi, Bu-Hong ; Kim, Hyun-Soo ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 279~285
DOI : 10.7837/kosomes.2012.18.3.279
It is necessary to install the inert gas system(IGS) for preventing fire and explosion in LNGC main diesel engine crankcase besides oil mist detector(OMD) unit with
gas injector. Therefore, to design the liquid nitrogen IGS, analytical work is conducted for predicting the heat input load of liquid nitrogen heater with two-phase stratified flow model. This paper also presents the effects of changes in pipe diameter, saturated pressure, and inclination angle by ship's movement on cryogenic two-phase stratified flows. It is found that the stratified model gives reasonable predictions, and the model is effective to predict the heat input load of liquid nitrogen IGS.
Study on the PV Driven Dehumidifying System with Oyster Shell and Thermoelectric Device
Kim, Myoung-Jun ; Chea, Gyu-Hoon ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 3, 2012, Pages 287~293
DOI : 10.7837/kosomes.2012.18.3.287
This paper has dealt with the probability of oyster shell desiccant cooling system driven by renewable energy of photo-voltaic effect. For this, fundamental experiments have been carried out focusing on the observation of dehumidifying effect of oyster shell and peltier elements used for air conditioning system. From this study, it is found that oyster shell has sufficient probability for using as a desiccant in air-conditioning system. Moreover, the heat releasing device(peltier element) can be used with direct current from PV cells so the system can be operated with high efficiency. As a result, the absolute humidity in a test chamber was reasonably controlled by oyster shell and peltier elements. Also the photo-voltaic energy from sun was enough for running power of this system.