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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 13, Issue 4 - Dec 2007
Volume 13, Issue 3 - Sep 2007
Volume 13, Issue 2 - Jun 2007
Volume 13, Issue 1 - Mar 2007
Selecting the target year
Ecosystem Modelling for Improvement Summer Water Quality of Jinhae Bay in 2003
Hong, Sok-Jin ; Lee, Won-Chan ; Jung, Rea-Hong ; Oh, Hyun-Tek ; Jang, Ju-Hyung ; Goo, Jun-Ho ; Kim, Dong-Myung ;
Journal of the Korean Society of Marine Environment & Safety, volume 13, issue 2, 2007, Pages 103~110
This study estirmted the appropriate pollutant load reduction from point sources in Jinhae Bay, Korea, using an eco system model. The results of COD values in the inner part of the bay obtained through the simulation by ecosystem model were greater than 3.0mg/L, and exceeded the limits of Korean Coastal Water Quality Grade III. Engineering countermeasures to reduce the
of all land based pollution load or organic and inorganic material loads from point sources by more than 50% were required to keep the COD levels below 2 mg/L. The reduction loads is 5,632kg/day of COD, 481kg/day of DIP and 7,991 kg/day of DIN in case of the reduction of both the organic and nutrients. The estimated environmental currying capacity of that case is 13,112kg/day of COD, 206kg/day of DIP and 3,425kg/day of DIN to keep the COD levels below 2mg/L.
Reduction of Autochthonous Organics in Masan Bay using a Simple Box Model
Hong, Sok-Jin ; Lee, Won-Chan ; Yoon, Sang-Pil ; Park, Sung-Eun ; Cho, Yoon-Sik ; Kwon, Jung-No ; Kim, Dong-Myung ;
Journal of the Korean Society of Marine Environment & Safety, volume 13, issue 2, 2007, Pages 111~118
Simple box budgets models are useful tools to understand the phenomena of natural system and to provide an insight into the complex processes including physical, chemical and biological processes occurring in natural system. Budgets of fresh water, salt and nutrients were estimated in order to clarify the characteristics of seasonal material cycle in the Masan Bay. Outflow volume of freshwater into system was approximately
. Inflow masses of DIP and DIN were approximately
, respectively. DIN is expected to accumulate in the system. The removal of nutrients from bottom sediments will contribute to the reduction of 21.0% of COD concentration in the system.
Stratification Variation of Summer and Winter in the South Sea of Korea
Lee, Chung-Il ; Koo, Do-Hyung ; Yun, Jong-Hwui ; Kim, Dong-Sun ;
Journal of the Korean Society of Marine Environment & Safety, volume 13, issue 2, 2007, Pages 119~125
In order to illustrate the variation cf stratification and to know the effects of the temperature and the salinity on the stratification in the South Sea of Korea, the stratification parameter defined as potential energy anomaly (PEA,
) introduced by Simpson and Hunter (1974) was used. The oceanographic data were obtained in August 1999 and February 2000 by National Fisheries Research and Development Institute (NFRDI). V in August is generally high in offshore and low in near shore. However, in February, V in the near shore is higher than that cf the offshore due to the vertical temperature gradient between surface and bottom layer caused by the expansion of South Korean Coastal Waters (SKCW). In summer, the increase of the atmospheric heating acts on the stratification as the buoyancy forcing. In most cases, the effect cf the temperature on the stratification is stronger than that of the salinity. The temperature effect is predominantly due to the extent of the intrusion of Tsushima Warm Current into the study area. However, at stations where V is high the effect of the salinity is also significant. In winter, V is very low due to the decrease cf the buoyancy forcing, but some stations show the relatively high V due to the expansion of SKCW and salinity in winter unlike that in summer makes the stratification weak.
The Study on a Reservoir Environment Development Method of Coast Small Islands using 0-1 Integer Programming
Joo, K.S. ; Park, S.H. ;
Journal of the Korean Society of Marine Environment & Safety, volume 13, issue 2, 2007, Pages 127~132
This study is to determine an optimal reservoir among many alternative proposals in order to obtain the maximized efficiency under the limited budget. There are many alternative proposals which deal with problems to assign reservoir such as water conversion establishment construction, subterranean water, reservoir, submarine pipeline, water boat, and marine water saving base construction. In this paper, the new model to assign the most reasonable alternative is introduced using 0-1 integer programming. This proposed model has not been applied in the optimal reservoir selection problem yet. This paper will contribute to determine the most reasonable alternative to minimize budget under constraints. Also, this proposal model can be applied to other reservoir selection problem in other regions.
A Study on the Optimum Navigation Route Safety Assessment System using Real Time Weather Forecasting
Choi, Kyong-Soon ; Park, Myung-Kyu ; Lee, Jin-Ho ; Park, Gun-Il ;
Journal of the Korean Society of Marine Environment & Safety, volume 13, issue 2, 2007, Pages 133~140
Since early times, captain have been sailing to select the optimum route considering the weather, ship loading status condition and operational scheduling empirically. However, it is rare to find digitalized onboard route support system whereas weather facsimile or wave and swell chart are utilized for the officer, based on captain's experience. In this paper, optimal route safety assessment system which is composed of voyage efficiency and safety component is introduced. Optimum route minimizea ETA(estimated time of arrival) and fuel consumption that shipping company and captain are requiring to evaluate for efficient voyage considering speed loss and power increase based on wave added resistance of ship. In the view point of safety, seakeeping prediction is performed based on 3 dimensional panel method. Finally, It is assistance measure for ship's optimum navigation route safety planning & assessment.
An Analysis on the Operation Efficiency of Safety Management System using DEA Method
Yang, Hyoung-Seon ; Kim, Chol-Seong ; Noh, Chang-Kyun ;
Journal of the Korean Society of Marine Environment & Safety, volume 13, issue 2, 2007, Pages 141~146
In this study, we have investigated several input factors and output factors to maintain safety management of domestic shipping companies, and then have analyzed the efficiency of performance about each shipping companies' safety management system from 1998 year to 2004 year using DEA method. The result of analysis shows that the annual mean efficiency index of total companies tended downward every year. Analysis was that the cause was increase of the cost of repairing ship, the cost of ship's stores and idle day of ship while the number of marine accidents and sanctions of PSC, ship's insurances and P&I insurances was decreased.
A Study on the Method of Conducting a Large Container Vessel Safely to the Newly Built Container Pier to get alongside in Busan Harbour
Yoon, Jeom-Dong ; Yun, Jong-Hwui ; Lee, Chun-Ki ;
Journal of the Korean Society of Marine Environment & Safety, volume 13, issue 2, 2007, Pages 147~153
In this paper, the authors calculated maneuvering motions of a large container vessel approaching to the newly built container piers to get alongside to her berth in Busan harbour. The motion calculations were done by using fixed coordinate system and the object of the calculations is to check the maneuvering motions are safe or not for berthing the large vessel to her berth. The result of calculations manifested that a large container vessel can get alongside to the piers without any difficulty under normal weather conditions by using 2 Z. Peller tug boats of 4500 H.P. each and also these demonstrated it is difficult to conduct and get her alongside to the piers under rough weather conditions of wind force 16.9m/sec or more. Under rough weather conditions of 6 by Beaufort scale the average wind velocity is about 13.5m and if we add 25% increase of the normal velocity to it, the wind will becomes a gust of 16.9m/sec. So it is advisable to avoid conducting a large container vessel to the pier under the rough weather conditions of 6 or more by Beaufort scale. Also, it is better to use 3 Z. peller tug boats of 4500 H.P. each under the above mentioned rough weather in a case of unavoidable circumstances.
Evaluation of Order for Allocation of Rescue Unit using Analytic Network Process
Jang, Woon-Jae ; Keum, Jong-Soo ;
Journal of the Korean Society of Marine Environment & Safety, volume 13, issue 2, 2007, Pages 155~160
This paper aims to evaluation of order for allocation of rescue unit using Analytic Network Process. For evaluation, in this paper, assess about person, ship and environment related risk by fuzzy logic and AHP(Analytic hierarchy Process). Also, quantity and quality operation efficiency assess by DEA(Data Envelopment Analysis) and Liquate scale. finally total weight calculate by ANP. At the result, Rescue Units of MP, YS RCC/RSC is order higher. Thus, it needs to have more rescue ships and rescue devices for relieving the risk in the future.
Optimal Feature Parameters Extraction for Speech Recognition of Ship's Wheel Orders
Moon, Serng-Bae ; Chae, Yang-Bum ; Jun, Seung-Hwan ;
Journal of the Korean Society of Marine Environment & Safety, volume 13, issue 2, 2007, Pages 161~167
The goal of this paper is to develop the speech recognition system which can control the ship's auto pilot. The feature parameters predicting the speaker's intention was extracted from the sample wheel orders written in SMCP(IMO Standard Marine Communication Phrases). And we designed the post-recognition procedure based on the parameters which could make a final decision from the list of candidate words. To evaluate the effectiveness of these parameters and the procedure, the basic experiment was conducted with total 525 wheel orders. From the experimental results, the proposed pattern recognition procedure has enhanced about 42.3% over the pre-recognition procedure.
The Control of Z-Source Inverter for using DC Renewable Energy
Park, Young-San ; Bae, Cherl-O ; Nam, Taek-Kun ;
Journal of the Korean Society of Marine Environment & Safety, volume 13, issue 2, 2007, Pages 169~172
This paper presents circuit models and control algorithms of distributed generation system(DGS) which consists of Z-type converter and PWM inverter. Z-type converter which employs both the L and C passive components and shoot-through zero vectors instead qf the conventional DC/DC converter in order to step up DC-link voltage. Discrete time sliding mode control with the asymptotic observer is used for current control. This system am be used for power conversion of DC renewable energy.