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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Marine Environment & Safety
Journal Basic Information
Journal DOI :
The Korean Society of Marine Environment and safety
Editor in Chief :
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
Descriptive Analysis of Low Saline Water in Youngdeuk, the East Coast of Korea in 2010
Choi, Yong-Kyu ; Kwon, Kee-Young ; Yang, Joon-Yong ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 379~387
DOI : 10.7837/kosomes.2012.18.5.379
In order to see the oceanographic conditions, the observations of aquaculture farm of ascidian in Youngdeuk, the east coast of Korea were conducted through 6 times-23 February, 6 April, 8 June, 19 August, 6 October and 20 December-in 2010. Surveys were conducted in 20 stations bimonthly using SBE 19 CTD instrument. The mixed layer depth (MLD) was deep in winter and shallow in summer. The cold water below
in temperature was occupied below thermocline through all season. The temperature was high in the southeastern area. The salinity was increased from the coast to the open sea. The halocline was distinct at 20 m depth in August and at 40 m depth in October. The lowest value of salinity was appeared at the depth of 10 m in October. In addition the value of precipitation minus evaporation denoted negative in October. These low saline water seemed to inflow to the coast from the open sea. Therefore the low saline water moved to the east coast of Korea. The EKWC may play an important role to convey the low saline water. It may affect the aquaculture farm along the coast as the mass mortality of ascidian. It needs to clarify the role and pathway of EKWC to transfer the low saline water along the east coast of Korea.
Application of Three-Dimensional Numerical Irregular wave Tank(3D-NIT) Model
Lee, Kwang-Ho ; Baek, Dong-Jin ; Kim, Do-Sam ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 388~397
DOI : 10.7837/kosomes.2012.18.5.388
In this study, 3D-NIT(3-Dimensional Numerical Irregular wave Tank) model in which regular wave as well as stable irregular wave can be generated in 3-dimensional numerical irregular wave tank was proposed. To verify validity, the following steps need to be conducted: 1) comparative analysis between calculated waveforms and targeted waveforms at the wave generating point, 2) comparative analysis with the existing experimental values of overtopping volume estimated, targeting shore protection structures installed on a slope bed, 3) comparison with the existing numerical and hydraulic experimental results through application in the analysis on the wave deformation by structures and wave force acting on the vertical cylindrical structures. Based on the results, characteristics of the breaking wave forces according to incident waves and interval distance of structures were identified through application of 3D-NIT model in the analysis on the breaking wave forces acting on the cylindrical structures installed on a slope bed, and reflection and overtopping was reviewed through application in the special breakwaters on the domestic fields. The numerical results obtained the 3D-NIT model are in good agreement with experimental results, and its applicaion to the complex-shpaed coastal structures is verified.
Distribution Characteristics of Polycyclic Aromatic Hydrocarbons(PAHs) in Riverine Waters of Ulsan Coast, Korea
You, Young-Seok ; Lee, Jeong-Hoon ; Park, Jeong-Chae ; Kim, Dong-Myung ; Cho, Hyeon-Seo ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 398~405
DOI : 10.7837/kosomes.2012.18.5.398
PAHs(Polycyclic Aromatic Hydrocarbons) in coastal area and estuary adjacent to urban area and industrial activities region are mainly introduced into marine environment via atmosphere and river. This study which is evaluated the distribution characteristics of PAHs discharge from rivers and sewage disposal water which flowing into Ulsan bay, and were carried out in Jun of dry season and in Auguest of wet season, 2008. The water samples from eight main rivers and Youngyeon WWTP(Wastewater Treatment Plant) flowed into Ulsan bay were taken for analysis of dissolved PAHs. The range and mean values of dissolved PAHs concentrations showed 10.30 to 87.88 ng/L, its mean 36.94 ng/L in dry season and 10.30 to 69.57 ng/L, its mean 24.37 ng/L in wet season. The distribution of dissolved PAHs showd the high concentrations in the Gungcheoncheon which is flowed from urban and industrial area. The ranges and means values of the loading fluxes were estimated with 0.04 to 8.27 g/day, its mean 2.05 g/day in dry season, and 0.03 to 4.77 g/day, its mean 1.61 g/day, in wet season. The loading flux showed the highest value in Taewha river due to the high flow rate and the urban activity. The composition patterns of dissolved PAHs compound showed most of the trend occupying low molecuar weight PAHs than high molecular weight PAHs. These results were due to physical and chemical characteristics of PAHs compound, and were similar to those of other studies. The concentrations of dissolved PAHs in this study are lower than those of other studies, and the level of PAHs pollution appeared to be not serious in reverine waters of Ulsan coast.
Marina Development on the Importance of Optimum Demand and Location Selection Study
Lee, Jae-Hyung ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 406~415
DOI : 10.7837/kosomes.2012.18.5.406
The research aims to provide its results to each municipal corporation after an in-depth analysis of its optimum demand and also the significance of post-development location selection. The research results, related to the future development of Marina from the municipal corporation, are as follows: There are approximately 49 proper domestic demands after the Marina development. In further detail, there must be a development of the coastal zone Marina concept after classifying the regions to their Metropolitan areas and networking the Marina to each section. Moreover, the classification of the Marinas to small, medium, and large size is of absolute necessity. Regionally, 10 large Marinas must be developed for metropolitan area (2), Chungcheong area (1), Jeolla area (2), Gyeongsang Provinces (3), Gangwon area (1), and Jeju (1). The 17 mid-sized leisure sports Marinas must be developed for metropolitan area (3), Chungcheong area (2), Jeolla area (2), Gyeongsang Provinces (6), Gangwon area (2), and Jeju (2). The rest of 22 small Marinas must be developed for metropolitan area (2), Chungcheong area (1), Jeolla area (6), Gyeongsang Provinces (9), Gangwon area (2), and Jeju (2). In addition, there is an evident result of significant importance in the domestic positions of appropriate Marina development. A group of professionals suggested five key factors contributed to the importance including accessibility, marketability, usability, validity, and natural environment. The results, aimed to show comprehensive importance based on the five factors, ranks in the following order from highest to lowest: usability, accessibility, natural environment, marketability, and validity.
A Study on the Assessment of the Marine Traffic Congestion and the Improvement of a Technical Standards
Um, Han-Chan ; Jang, Woon-Jae ; Cho, Kyung-Min ; Cho, Ik-Soon ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 416~422
DOI : 10.7837/kosomes.2012.18.5.416
To prevent serious maritime accident and eliminate the cause of the potential maritime accidents, Maritime Safety Audit Scheme was formally institutionalized through amendment of Maritime Traffic Safety Act(May 27, `09). At the initial step of the enforcement of the law, it has risen the necessity of amending the present institution concerning with the range of applicable business, method of practice, detailed technical standards in the assessment articles, etc. Among them, the assessment of marine traffic congestion has been practiced as a mandatory assessment article, but it is analyzed that the assessment doesn`t reflect current variation of ships` size and its speed. By analyzing the status of assessments on marine traffic congestion so far and collecting experts` opinion, this paper suggests draft amendments to improve technical standards on the assessment of marine traffic congestion.
A Fundamental Study on the Improvements of Speed Limit at the Ports and Fairways in Korea
Kim, Deug-Bong ; Yun, Byeong-Won ; Jeong, Jae-Yong ; Park, Jin-Soo ; Park, Young-Soo ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 423~430
DOI : 10.7837/kosomes.2012.18.5.423
The purpose of Speed limit at sea is to keep harbor calmness, to maintain efficient traffic flow and to prevent maritime accidents. The Korean Regional Maritime Affairs and Port Office(KRMAPO) specified and enforced the ship`s speed limits at the 19 harbors around the Korean coasts. However, problems have been raised to the adequacy of speed limits. This paper made a research on the speed limit set standards, analyzed vessel traffic survey and the dilemma on the specified speed limits imposed by KRMAPO. The result of this study has shown an overall average of 48 % violation rate on speed limit with passenger ships and large vessels of more than 5,000 tons having higher violation rate. Average speed was higher than the limit speed in some harbors and deviation of 4.2 to 5.2 knots was investigated. Further, harbors having higher average speed also have higher deviation accident incidence. Therefore, this paper had confirmed that there is a need for institutional review and improvement of Korea`s port and fairways speed traffic management.
A Basic Study on Assessment Criterion of the Risk Factor for the Marine Traffic Environment
Kim, Chol-Seong ; Lee, Hong-Hoon ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 431~438
DOI : 10.7837/kosomes.2012.18.5.431
The representative risk evaluation techniques of the marine traffic environment are the FSA, PAWSA, & IWRAP. For the development of these techniques, the risk factors suitable to the marine traffic environment should be selected & the assessment criterion of the risk factors should be provided. The risk factors were selected as the factors that relate both to the frequency of casualty & to the consequence of casualty because the risk was defined as the frequency of casualty times the consequence of that casualty on the existing techniques. But, the risk factors relate to the consequence of casualty are excluded because the risk is defined as the sum of the risk factors including the frequency and the consequence by factors on this study. The 20 kinds of risk factors to compose the risk are selected and classified into 5 categories according to similar nature through the analysis of preceding study on the classification of the risk factors. Finally, as the foundation of risk assessment model`s development for domestic marine traffic environment, the practical assessment criterion of the risk factors are suggested.
A Study on the Release of Hatch Cover in Sand Carriers
Jung, Chang-Hyun ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 439~445
DOI : 10.7837/kosomes.2012.18.5.439
Only the sand carriers fitted with hopper doors can remove their hatch covers in current regulations. However, there is no sand carriers fitted with hopper doors in korea. Through the analysis of accidents, inspection of equipment installed on ships, and evaluation of stability and seakeeping performance concerning the sand carriers, it is expected that the current exemption requirement is modified for hatch covers for sand carriers. As the result, this paper proposed the removal of hatch covers and be fitted by tarpaulin instead to protect water ingress into the holds. This can be done by making the holds smaller designed to be filled full until the top of the hold without exceeding loadline. Also, the bilge pumps should have the sufficient capacity of pumping water out in the early stage of sand-water mixture to wetted condition in approximately 1 hour and be operationally ready in every voyage conditions.
Effective Extraterritorial Application of Criminal Law outside the Territorial Sea - Related to the Enactment of the Korean Coast Guard Act -
Kim, Jong-Goo ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 446~454
DOI : 10.7837/kosomes.2012.18.5.446
This study discusses effective extraterritorial application of criminal Law outside the territorial sea. The paper focuses on the factual differences between vessels and cars which justify the varying standard. Thus, warrantless searches and safety inspection need to be validated because of the exigent circumstances of the sea. Warrantless searches at sea may also be justified based on border search exception. These theories in U. S. law will be helpful for legislation and law enforcement related to the Korean Coast Guard`s mission. The paper also discusses Korean Coast Guard`s Act`s newly enacted provisions concerning search, arrest and hot pursuit.
A Study on the Influence of Centrifugal Force for Flow Characteristics in Square-sectional Air Duct
Bong, Tae-Keun ; Cho, Dae-Hwan ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 455~460
DOI : 10.7837/kosomes.2012.18.5.455
In this paper, an experimental and numerical investigation of transition characteristics in a square-sectional curved duct flow under Centrifugal force is presented. The experimental study is carried out to measure axial velocity profiles by using Laser Doppler Velocimeter (LDV) system. Computational fluid dynamic (CFD) simulation was performed using the commercial CFD code FLUENT to investigate the transition characteristics. The flow development is found to depend upon Dean number and curvature ratio. The velocity profiles in center of the duct have lower value than those of the inner and outer walls because of the centrifugal forces.
Pressure Drop due to Friction in Small Rectangular Channel
Lim, Tae-Woo ; Choi, Jae-Hyuk ; Kim, Jun-Hyo ; Choi, Yong-Suk ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 461~467
DOI : 10.7837/kosomes.2012.18.5.461
An experimental study was carried out to measure frictional pressure drop in flow boiling to deionized water in a microchannel having a hydraulic diameter of
. Tests were performed in the ranges of heat fluxes from 100 to
, vapor qualities from 0 to 0.2 and mass fluxes of 200, 400 and
. The frictional pressure drop during flow boiling is predicted by using two models; the homogeneous model that assumes equal phase velocity and the separate flow model that allows a slip velocity between two phases. From the experimental results, it is found that the two phase multiplier decreases with an increase in mass flux. Measured data of pressure drop are compared to a few available correlations proposed for macroscale and mini/microscale. The homogeneous model well predicted frictional pressure drop within MAE of 29.4 % for the test conditions considered in this work.
A Study on Synthesis of Carbon Nanomaterial as a Material for Eco-ship
Choi, Jae-Hyuk ; Kim, Jae-Hyun ; Shin, Woo-Jung ; Choi, Jung-Sik ; Ryu, Kyoung-Boo ; Lee, Sang-Min ; Park, Seol-Hyun ; Lee, Joo-Hee ; Lim, Tae-Woo ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 468~474
DOI : 10.7837/kosomes.2012.18.5.468
In this study, experimental studies were performed for the carbon nanomaterial(CNM) which is catching on as a material for eco-ship. The opposed-flow methane flame was used as a heat source for synthesis of CNM. Ferrocene was used as a catalyst for the synthesis of CNM. These major parameters were
mixing rate and sampling positions that synthesize CNMs in opposed-flow diffusion flames. The propensities of CNMs were experimentally determined using SEM and TEM images. The experimental result showed that the amount of CNTs was increased with increasing
concentration. It can also be found that the optimal temperature in opposed-flow methane flame for synthesis of CNT was about 1500 K.
An Implementation of the RGB Remote Controller for LED Emotion Lighting of AtoN Facilities
Jeong, Yeong-Cheol ; Choi, Jo-Cheon ; Cho, Dae-Hwan ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 475~480
DOI : 10.7837/kosomes.2012.18.5.475
This study on the methode is easied to distinguish with emotional visual lighting on AtoN facility using 3colors LED, and which is controlled to on-off switching of approach light in shore or harbor. The identification have easied to provide a differentiation between the AtoN facility of red and white light and surrounding light in harbor both sides. And the integrated controller have designed to left-right and serial sequential lighting system for harbor guidance using the GPS synchronous or timer. There is expectation effect that is prevent a confusion about distinguish of facility by ship`s operator and to beautify a night scene of harbor, which is expressed to emotional identification lighting and variable color lighting on AtoN body by vertical layer color lighting using LED. In addition, the performance of AtoN is implemented to display with guidance light the harbor safety message by morse code lighting. Effectiveness of system is enhanced that age and power consumption reduce by candle alternated high light LED.
Effects of Water Cavitation Peening on Cavitation Characteristics of 5000 Series Al Alloys
Kim, Seong-Jong ; Hyun, Koang-Yong ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 481~487
DOI : 10.7837/kosomes.2012.18.5.481
Recently, the construction of the small Al alloy ships is an increasing trend in viewpoint such as the disposal issue of a retired ship, the enhancement of environmental regulation and resources recycling etc. for FRP ships. However, Al alloy ship which can achieve high speed by light weight in marine environment is exposed to a problem on materials damage by cavitation-erosion which is generated by large impact pressure with the collapse of air bubbles due to cavitation. Consequently, in this study, water cavitation peening technology was applied in Al alloy for ship to enhance durability life by preventing cavitation damage. So, the water cavitaton peening application time that presented the excellent cavitation characteristic investigated. The weight-loss of 5456-H116, 5083-H321 and 5052-O Al alloy at the optimum water cavitation peening time were improved to 42.11 %, 50.0 % and 25.7 %, respectively.
An Experimental Study on Compensation Algorithm for Localization using Modified Bilateration Technique and Pyroelectric Sensor in a Ship
Seong, Ju-Hyeon ; Choi, Jae-Hyuk ; Kim, Jong-Su ; Seo, Dong-Hoan ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 488~495
DOI : 10.7837/kosomes.2012.18.5.488
The real-time indoor location technology using radio waves has been studied in a variety of environments. One of them, a ship which consists of steel structure has high reception rate but causes significant ranging error due to the reflection of radio waves. In order to reduce location measurement errors that occurs in such a environment, this paper, based on CSS of IEEE 802.15.4a, presents compensation algorithm for localization using modified bilateration and pyroelectric sensor in a ship. The proposed system reduces the number of fixed nodes by estimating the appropriate reception distance between mobile node and fixed node through the analysis of CSS characteristic in a narrow passage such as ship corridors. Also, in the corner section which the ranging errors are significantly fluctuated due to the reflection and diffraction of radio waves, we recognize the location by tracking the a moving section using modified bilateration technique and pyroelectric sensor. The experimental results show that the location accuracy and efficiency of the proposed algorithm are improved 86.2 % compared to general method.
A Study on Obligations of Contracting Parties regarding Reporting Requirements under MARPOL 73/78
Suk, Ji-Hoon ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 5, 2012, Pages 496~504
DOI : 10.7837/kosomes.2012.18.5.496
In the field of environmental protection, close co-operation between Contracting Parties is strongly required and the reporting obligation under MARPOL 73/78 is playing an important role as a part of international co-operation for the environmental protection. In this paper, I review the meaning of reporting obligation under MARPOL 73/78 from the perspective of the international law, and investigate the status of implementation for the reporting obligation. For this purpose, I analyze status of implementation for last 10 years from 2001 to 2010 regarding reporting obligations under MARPOL 73/78 in accordance with MEPC/Circ.318. Finally, I suggest the way forward to improve Contracting Parties` compliance with reporting obligations through this analysis.