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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
Editor in Chief :
Volume & Issues
Volume 19, Issue 6 - Dec 2013
Volume 19, Issue 5 - Oct 2013
Volume 19, Issue 4 - Aug 2013
Volume 19, Issue 3 - Jun 2013
Volume 19, Issue 2 - Apr 2013
Volume 19, Issue 1 - Feb 2013
Selecting the target year
Characteristics of Spatio-temporal Variability of Daily averaged Tidal Residuals in Korean Coasts
Kim, Ho-Kyun ; Kim, Young-Taeg ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 561~569
DOI : 10.7837/kosomes.2013.19.6.561
EOF analysis of tidal residual derived from 2003~2009 tide data was used to identify the spatio-temporal variability. The effect of sea surface air pressures and winds on the tidal residual was also investigated by the correlation analysis. The first mode accounting for 68 % of the total variance represented concurrent sea level rise or fall, and the second mode accounting for 21 % of the total variance explained alternative sea level rise and fall between West Sea coast and both South Sea and East Sea coasts. While northerly and southerly winds dominated the tidal residual in the eastern coast of Yellow Sea, the effect of sea surface air pressures on the tidal residual increased along the coastal regions from South Sea to East Sea.
Environmental Characteristics of Seawater and Sediment in Mariculture Management Area in Ongjin-gun, Korea
Kim, Sun-Young ; Kim, Hyung-Chul ; Lee, Won-Chan ; Hwang, Dong-Woon ; Hong, Sok-Jin ; Kim, Jeong-Bae ; Cho, Yoon-Sik ; Kim, Chung-Sook ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 570~581
DOI : 10.7837/kosomes.2013.19.6.570
To improve productivity of aquaculture animals with management of culturing grounds, survey of mariculture management area in Ongjin-gun about water quality and sedimentary environment had been conducted on June, August and November in 2011. Water temperature in surface and bottom waters ranged from 9.49 to
. Salinity and dissolved oxygen concentrations were in the range of 23.19~31.49 and 5.48~9.36 mg/L, respectively, depending on the variation of water temperature. The average concentration of COD was 1.57 mg/L and the concentrations of DIN and DIP showed entirely low level. As the result of grain size analysis, sand(56.66 %) and silt(34.60 %) were predominated. The Mz of sediment showed a variation of 2.59 to
and sorting appeared to be poorly sorted. The concentrations of COD and IL in surface sediment ranged from 1.00 to
and 0.72 to 5.29 %, respectively, which showed relatively good positive correlations. On the environmental assessment of trace metals in surface sediment, geoaccumulation index (
) class indicated that sediments were not contaminated by most of metallic elements except Cr and As. Our result implies that this study area showed good water quality and sediments were not polluted by organic matters and metallic elements.
Tide and Tidal Currents Around the Archipelago on the Southwestern Waters of the South Sea, Korea
Choo, Hyo-Sang ; Kim, Dong-Sun ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 582~596
DOI : 10.7837/kosomes.2013.19.6.582
In order to estimate the tide and flow properties around the archipelago, around Dolsan, Choyak, Geogeom and Jindo which located in the southwestern waters of the south sea of Korea, tidal currents, residual flows and tidal energy dissipation were investigated by using 2-dimensional numerical model. The maximum speeds of tidal currents are small around Dolsando(31.92 cm/s) and large around Jindo(87.55 cm/s). The residual flow is fastest around Choyakdo where many channels and islands as compared with other study areas. The area around Jindo has the highest currents speed, but shows the flat movements. The margins between the maximum and the minimum dispersion rates of tidal energy in the areas are estimated and designate the order of values around Dolsando(
erg/s) and Jindo(
erg/s) sequently. These circumstances are same as in the amplitude of M2 constituent. This means that rapid depth changes and narrow channels play an important role in tide and tidal currents energy in archipelago.
Suitable Site Assessment using Habitat Suitability Index for Styela Clava and Styela Plicata in Jindong Bay
Cho, Yoon-Sik ; Hong, Sok-Jin ; Lee, Won-Chan ; Kim, Hyung-Chul ; Kim, Jeong-Bae ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 597~605
DOI : 10.7837/kosomes.2013.19.6.597
This study was conducted in warty sea squirt farm, Jindong Bay(10 stations; July, October, January, April) for the culture period of Styela clava, Styela plicata. We utilized water temperature, chlorophyll a, suspended particulate matter, hydrodynamics, salinity and dissolved oxygen saturation for the suitability assessment of warty sea squirt farm. Newly, Life Requisite Suitability graphs were made for the correlation between the growth of Styela clava, Styela plicata and farm environment. As a result of the assessment for Habitat Suitability Index, western bay(HSI 0.32~0.41) show values higher than eastern bay(HSI 0.19~0.27). This result shows the high correlation with the unit production of Styela clava, Styela plicata(
=0.834, P<0.01). This could be helpful for fishery management for the sustainable productivity through the scientific suitable site assessment.
A Study on the Setting of Regional Oil Recovery Capacity On Water in Korea
Ha, Min-Jae ; Yun, Jong-Hwui ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 606~611
DOI : 10.7837/kosomes.2013.19.6.606
In this study, the regional states of 7 items are analyzed, the regional risks are calculated by using normalized data & analysis hierarchy process to set regional oil recovery capacity. Area on-water oil recovery capacity,
, is separated and regional on-water oil recovery capacity is determined, based on calculated regional degree of risk. Excessive current oil recovery capacities, setting in Incheon, Gunsan, Mokpo, Busan region, are as a result distributed to the other regions in each area. In case of central region, Daesan is increased as much as
, Yeosu is increased as much as
, Ulsan is increased as much as
. The regional on-water oil recovery capacity, considering both the cause of accident aspects and marine environmental & economic aspects, is estimated as more balanced distribution model, compared to current standard of on-water oil recovery capacity.
A Forecast Method of Marine Traffic Volume through Time Series Analysis
Yoo, Sang-Rok ; Park, Young-Soo ; Jeong, Jung-Sik ; Kim, Chul-Seong ; Jeong, Jae-Yong ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 612~620
DOI : 10.7837/kosomes.2013.19.6.612
In this study, time series analysis was tried, which is widely applied to demand forecast of diverse fields such as finance, economy, trade, and so on, different from previous regression analysis. Future marine traffic volume was forecasted on the basis of data of the number of ships entering Incheon port from January 1996 to June 2013, through courses of stationarity verification, model identification, coefficient estimation, and diagnostic checking. As a result of prediction January 2014 to December 2015, February has less traffic volume than other months, but January has more traffic volume than other months. Also, it was found out that Incheon port was more proper to ARIMA model than exponential smoothing method and there was a difference of monthly traffic volume according to seasons. The study has a meaning in that future traffic volume was forecasted per month with time series model. Also, it is judged that forecast of future marine traffic volume through time series model will be the more suitable model than prediction of marine traffic volume with previous regression analysis.
The Effect of Transformational Leadership on Organizational Commitment - Focused on Fleet Crew of Korean Coast Guard -
Sin, Ho-Sig ; Youn, Dae-Gwun ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 621~628
DOI : 10.7837/kosomes.2013.19.6.621
It is already recognized, the fleet crew of Korean Coast Guard(KCG) have come to perform a wide range of roles that they carry on duties on inferior working conditions. Therefore a research on leadership is seemed necessary to improve organizational effectiveness for them. This study is to examine whether leadership style with transformation is appropriate in organizational commitment for the fleet crew of KCG. In this study transformational leadership is fixed as independent variables and organizational commitment as dependent variables and also five factors as demographic characteristics. Intellectual stimulation is turned out to be the most influential factor in organizational objective(t=6.664, p=0.000) and continuance commitment(t=4.057, p=0.000), but individualized consideration are uninfluential factors concerning organizational commitment.
A Study on Development of Safety Management Evaluation Index for Shipping Company
Kim, Hwa-Young ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 629~636
DOI : 10.7837/kosomes.2013.19.6.629
There is no safety evaluation index with marine accidents and information of ship's safety management result for good grasp of safety management level of shipping company and effective monitoring. In this paper, we proposed a SMEI(Safety Management Evaluation Index) for evaluation of shipping companies. The SMEI is consist of MAR(marine accidents ratio), SSMR(ship safety management ratio) and SAP(safety advantage point) through brainstorming of the expert group and AHP(analysis hierarchy process)in previous study. And weights of SMEI are calculated using experts's opinions through the Delphi method. We also verified the validity of proposed SMEI to 119 Korean shipping companies with 916 ocean-going ships of Korean flag, which grouped three part (small, mid and big) by number of ship and gross tonnage. And we found out 19 shipping companies, 8 companies in group1 & group2 respectively and 3 companies in group 3, with score below 1.0 by SMEI. In these companies, there are no marine accidents in recent 3 years and appeared low frequency remarkably in the detention and mojor non-conformity by data analysis.
A Study on the Relation between Towing Force of Tow Vessel and Towing Point and Behavior of Towed Ship
Nam, Taek-Kun ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 637~642
DOI : 10.7837/kosomes.2013.19.6.637
In this paper, an analysis results of towing force and towing points which are dominating factors to determine the behavior of towed ship are introduced. The towing force and towing points to achive the desired posture and its position of the towed vessel are derived based on simplified dynamics and linearization method. LQR algorithm for posture control is applied to linearized system and numerical simulation is also executed. Force based on COG(cneter of gravity) and gain of controller to achieve desired posture for target vessel are obtained by using Riccati matrix equation and pseudo inverse matrix is applied to analyze the relation between the derived force and its towing point. Based on this analysis method, towing force need to move the towed vessel from its initial position to target position can be calculated. The towing method including towing point and direction is also considered on this method. Finally, the relation between towing force and towing point is confirmed from the analysis and the results can be applied to arrangement of tug boats during salvage works.
A Study on the Fog Detecting System Using Photo Sensor
No, Byeang-Su ; Kim, Kab-Ki ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 643~648
DOI : 10.7837/kosomes.2013.19.6.643
In this paper, we developed a system which can detect and can alarm about the sailing provocative climate by using a photo. The research on domestic shipbuilding industry and in IT fusion technology is under construction, but a reliable safety device which can alarm a sailor about the circumstances of the fog and rain during ship operation as soon as possible due to the constant state in domestic. In this paper, a compact, for system low-power transceiver and data processing equipment for sensing were developed, also a performance evaluation got accomplished with simulation analysis. In results, it is operating normally at least 32.36[dB] and maximum values f 89.20[dB] in the domestic, and 32.55 to 60.66[dB] in the outdoors.
A Study on Development of Job-based Expert Training Model for International Maritime Dangerous Goods
Lee, Hong-Hoon ; Rim, Geung-Su ; Seo, Hye-Kyung ; Keum, Jong-Soo ; Kim, Chol-Seong ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 649~657
DOI : 10.7837/kosomes.2013.19.6.649
In this study, for a proposal of job-based IMDG code expert training model, the training cases of other countries were analyzed comparatively and a questionnaire-survey was conducted to find the needs of workers. As results of comparative analysis, various curriculums were operated by jobs of workers in USA and by kinds of dangerous goods or vehicles in UK, but a common curriculum was provided for various jobs of workers in Korea. It was analyzed that current domestic curriculum is not efficient, and the respondents demand expansion of training including provision of information via web-site as results of questionnaire survey. Therefore, in conclusion, after the shore workers were classified into three groups(on-site worker, office worker, & carrying worker), the customized training program of each group was suggested. Furthermore, this study proposed the regional operation of training course to meet regional demand on education including establishment of on-line curriculums.
A Study on the Characteristics Measurement of Main Engine Exhaust Emission in Training Ship HANBADA
Choi, Jung-Sik ; Lee, Sang-Deuk ; Kim, Seong-Yun ; Lee, Kyoung-Woo ; Chun, Kang-Woo ; Nam, Youn-Woo ; Jung, Kyun-Sik ; Park, Sang-Kyun ; Choi, Jae-Hyuk ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 658~665
DOI : 10.7837/kosomes.2013.19.6.658
In this study, we measured particulate matter(PM) which emerged as the hot issue from the International Maritime Organization(IMO) and the exhaust emission using HANBADA, the training ship of Korea Maritime University. In particular, the PM was obtained with TEM grid. PM structure was observed by electron microscopy. And exhaust gases such as NOx,
, and CO were measured using the combustion gas analyzer(PG-250A, HORIBA). The results of this study are as follows. 1) When the ship departed from the port, the maximum difference in PM emissions were up to 30 % due to the Bunker Change. 2) Under the steady navigation, emission of PM was
when Bunker-A is changing L.R.F.O(3 %). And, at the fixed L.R.F.O (3 %), emission of PM was
. When the main engine RPM increased up to 20 % with fixed L.R.F.O(3 %), emission of PM was
. When we changed to low quality oil(L.R.F.O(3 %)), CO concentration from main engine increased about 16 %. On the other hand, when the main engine RPM is rising up to 20 %, CO concentration is increased more than 152 percent. These results imply that the changes of RPM is a dominant factor in exhaust emission although fuel oil type is an important factor. 3) The diameter of PM obtained with TEM grid is about
and its structure shows porous aggregate.
Development of Attitude Heading Reference System based on MEMS for High Speed Autonomous Underwater Vehicle
Hwang, A-Rom ; Ahn, Nam-Hyun ; Yoon, Seon-Il ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 666~673
DOI : 10.7837/kosomes.2013.19.6.666
This paper proposes the performance evaluation test of attitude heading reference system (AHRS) suitable for small high speed autonomous underwater vehicle(AUV). Although IMU can provides the detail attitude information, it is sometime not suitable for small AUV with short operation time in view of price and the electrical power consumption. One of alternative for tactical grade IMU is the AHRS based micro-machined electro mechanical system(MEMS) which can overcome many problems that have inhibited the adoption of inertial system for small AUV such as cost and power consumption. A cost effective and small size AHRS which incorporates measurements from 3-axis MEMS gyroscopes, accelerometers, and 3-axis magnetometers has been developed to provide a complete attitude solution for AUV and the attitude calculation algorithm is derived based the coordinate transform equation and Kalman filter. The developed AHRS was validated through various performance tests as like the magnetometer calibration, operating experiments using land mobile vehicle and flight motion simulator (FMS). The test of magnetometer calibration shows the developed MEMS AHRS is robust to the external magent field change and the test with land vehicle proves the leveling error of developed MEMS AHRS is below
. The results of FMS test shows the fact that AHRS provides the measurement with
error during 5 minutes operation time. These results of performance evaluation tests showed that the developed AHRS provides attitude information which error of roll and pitch are below
and the error of yaw is below
and satisfies the required specification. It is expected that developed AHRS can provide the precise attitude measurement under sea trial with real AUV.
A Study on the Basic Design and its Characteristics of 50ft-class CFRP Cruise Boat
Oh, Dae-Kyun ; Lee, Chang-Woo ; Jeong, Uh-Cheul ; Ryu, Cheol-Ho ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 674~680
DOI : 10.7837/kosomes.2013.19.6.674
As the range of marine leisure activity gradually expands to ocean-going, a habitable cruise boat has been getting the limelight. Advanced countries in the marine leisure industry in Europe and North America have already secured their competitiveness in designing and building cruise boats by elegant design, ergonomic structure and fuel efficiency through the adoption of light-weight hull materials. In contrast, mostly small power boats are developed and built in Korea, and GFRP take up the most of hull materials. This study inquired into the design and characteristics of a 50ft-class CFRP that ocean-going is possible. The hull-form of the CFRP cruise boast were analyzed to propose a hull form for the designed ship (MMU-C.B), and based on that, the design model of the MMU-C.B was built. Finally, the MMU-C.B's characteristics of the resistance performance and hull-planing were found by comparative reviews with the results of model tests of GFRP pleasure yachts.
The Optical Characteristics of 240 W High Power LED Fish Luring Lamp
Bae, Jae-Hyun ; An, Heui-Chun ; Kim, Sang-Woo ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 6, 2013, Pages 681~687
DOI : 10.7837/kosomes.2013.19.6.681
This study analyzed characteristics of 240 W high power LED lamps by comparing with those of traditional metal halide lamps. In addition, it analyzed the propriety of LED lamps as a source of light, considering seawater transmission characteristics. When Applying white LED package with the color temperature color temperature of 6500K, a 240W-LED fishing lamp has a characteristics of the luminous angle to be expanded to
, the illumination change was improved to 0.8, as well as the luminance efficiency was improved to 98.8lm/W. As results of comparison between one 1,500W-metal halide lamp and four 240W-LED lamp with considering a seawater transmission and a luminous efficiency of scotopic vision, the radiant flux of two lamps were almost equal level at 50m depth and the luminous flux was 5% higher LED lamp than metal-halide lamp even if only applying the luminous efficiency of scotopic vision. As the luminous flux of LED lmap was 14% higher than that of metal-halide lamp with applying the luminous efficiency of scotopic vision to radiant flux at 50m depth, so LED fishing lamp was verified to alternative possibility of metal-halide lamp.