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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Navigation and Port Research
Journal Basic Information
Journal DOI :
Korean Institute of Navigation and Port Research
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Volume & Issues
Volume 30, Issue 9 - Dec 2006
Volume 30, Issue 10 - Dec 2006
Volume 30, Issue 8 - Oct 2006
Volume 30, Issue 7 - Sep 2006
Volume 30, Issue 6 - Aug 2006
Volume 30, Issue 5 - Jun 2006
Volume 30, Issue 4 - Jun 2006
Volume 30, Issue 3 - Apr 2006
Volume 30, Issue 2 - Mar 2006
Volume 30, Issue 1 - Feb 2006
Selecting the target year
A Study on Interaction between Two Vessels Passing Close to Each Other on Parallel Courses and Calculation of Collision Time by its effect
Lee Chun-Ki ; Yoon Jeom-Dong ; Kang Il-Kwon ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 315~320
DOI : 10.5394/KINPR.2006.30.5.315
It is well known that the ship manoeuvring motion is greatly affected by hydrodynamic forces and moments acting between two vessels passing too close to each other in confined waters, such as in a harbour or narrow channel. This interaction between two vessels could be assumed to be the functions of the longitudinal distance, transverse distance and their speeds. The aim of this study is to calculate the interaction between two vessels passing close to each other on parallel courses by simulation, and to estimate the effect of rudder action and time at collision through simulation under the condition of various longitudinal distances and different speed-ratios of the two vessels.
Development of Ship`s Digital Compass Using Flux-gate Sensors with High Accuracy
Yim Jeong- Bin ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 321~329
DOI : 10.5394/KINPR.2006.30.5.321
The ultimate target cf this study is to develop ship`s Digital Compass that can substitute for conventional ship`s Magnetic Compass. At first, a new Digital Compass system consisting of three-axis Flux-gate sensors and small sized step motor was developed Then, new deviation adjustment theory incorporating with Kalman filter method was proposed through which automatic deviation analysis and correction are obtainable without ship`s swinging procedures. The effectiveness of developed Digital Compass and proposed deviation adjustment theory are verified throughout the performance evaluation tests on the training ship `SAE-NU-RI`.
Design of Lowpass Filter With the Wide Stopband Characteristics Using Microstrip Line
Choi Dong-Muk ; Shim Joon-Hwan ; Jeon Joongn-Sung ; Kim Dong-Il ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 331~334
DOI : 10.5394/KINPR.2006.30.5.331
In this paper, we designed and fabricated the lowpass filter with the wide stopband characteristics using microp- strip line. Adding the
open stub at the input and output ports, we developed the L-C ladder type lowpass filter using the open stub which has wide stopband characteristics. In order to reduce the entire size qf this filter, the high impedance microstrip lines were made with the meander structure. The lowpass filter was fabricated with the cutoff frequency 2.3 GHz and its measured frequency responses agree well with the simulation results.
A Study on Development of Integrated LAN on Board
Jeong Tae-Gweon ; Park Soo-Han ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 335~342
DOI : 10.5394/KINPR.2006.30.5.335
This paper is to develop an integrated LAN unit (hereinafter called ILU) which connects the transformed signals from on-board equipments with the information display unit and vice versa In developing the ILU, the topology, transfer mode, and protocol was inspected considering the structure and characteristics of a related ship. The principle of development was determined type. Finally the ILU appropriate for the ship`s characteristics was designed and developed.
A GPS Initial Synchronization Method for Robust DGPS Reference Stations in Noisy Environment
Park Jeong-Yeol ; Park Sang-Hyun ; Sin Jae-Ho ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 343~349
DOI : 10.5394/KINPR.2006.30.5.343
In order to enhance the robustness against noisy environment, the previous GPS initial synchronization method of DGPS reference stations adopts not only the coherent integration method but also the non-coherent integration method. However the previous GPS initial synchronization method muses the non-coherent integration loss, which is a dominant factor among the signal acquisition losses in noisy environment. And the non-coherent integration loss increases with the strength of noise signal. In this paper, a novel GPS initial synchronization method is proposed for robust DGPS reference stations in noisy environment. This paper presents that the proposed GPS initial synchronization method suppresses the non-coherent acquisition loss. Furthermore, with regard to the mean acquisition time, it is shown that the number of the search cells of the proposed GPS initial synchronization method is much smaller than that of the previous GPS initial synchronization method Finally, through the simulation by the GPS simulator, it is seen that the GPS signal of nigh signal-to-noise ratio can be acquired under increased noise floor using the proposed GPS initial synchronization method.
A Design of High Efficiency Doherty Power Amplifier for Microwave Applications
Oh Jeong-Kyun ; Kim Dong-Ok ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 351~356
DOI : 10.5394/KINPR.2006.30.5.351
In this paper, the high efficiency Doherty power amplifier has been designed and realized for microwave applications. The Doherty amplifier has been implemented using silicon MRF 281 LDMOS FET. The RF performances cf the Doherty power amplifier (a combination of a class AB carrier amplifier and a bias-tuned class C peaking amplifier) have been compared with those of a class AB amplifier alone. The realized Doherty power amplifier P1dB output power has 33dBm at 2.3GHz frequency. Also the Doherty power amplifier shows 11dB gain and -17.8dB input return loss at 2.3GHz to 2.4GHz. The designed Doherty amplifier has been improved the average PAE by 10% higher efficiency than a class AB amplifier alone. The Maximum PAE of designed Doherty power amplifier has been 39%.
Development of Personal Hand-held Electronic Devices for Marine Leisure Safety
Yim Jeong-Bin ; Nam Taek-Keun ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 357~362
DOI : 10.5394/KINPR.2006.30.5.357
This paper describes two kinds of personal hand-held electronic devices to enhance marine leisure safety. The one is Radar response-type safety device triggering by the pulse signal from a commercial 9GHz-band Radar to provide quick search and rescue with combined civilian-government-military fleets. The other one is M-RFID (Marine Radio Frequency IDentification) based safety electronic device using 900MHz Tx/Rx with spread spectrum frequency hopping and GPS. Through the field tests at sea using Korea Coast Guard`s warship the operating performances are verified. Further plan for practical use of each device was also discussed.
A Study of Developing Band Pass Filter for Radio Astronomy Equipments
Lee Je-Hun ; Kim Dong-Il ; Che Seung-Hun ; Song Young-Man ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 363~367
DOI : 10.5394/KINPR.2006.30.5.363
The frequency band
provides some of the best angular resolutions using many large and accurate radio telescopes. Developing high performance Bandpass Filter is needed for these equipments to receive low power signals from the space. In this paper, suggests Bandpass Filter for Radio Astronomy equipments. Designed by Microstrip Line for good pass characteristic and suppressing not necessary signals cause of using high frequency. Center frequency is 10.6 GHz and band width is 5% of Center frequency. Manufactured Bandpass Filter is suitable for Radio Astronomy Equipments. Bemuse it matches up to the result by simulate.
Flow Analysis in the Fuel Chamber of Engine by Applying Turbulent Models
Kwag Seung-Hyun ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 369~374
DOI : 10.5394/KINPR.2006.30.5.369
The flow analysis was made by applying the turbulent models in the complicated fuel chamber of engine. The
, Spalart-Allmaras and reynolds stress models are used in which the hybrid grid is applied for the simulation. The velocity vector, the pressure contour, the change of residual along the iteration number, and the dynamic head are simulated for the comparison of four example cases. Computational results are compared with others. For the code`s validation, 2-D bodies were simulated in advance by predicting the drag coefficients.
A Study on the Comparison of Resistance Performance for Shape of Fin Keel of Sailing Yacht
Choo Kyung-Hoon ; Sim Sang-Mok ; Park Choung-Kwan ; Jin Song-Han ; Kwon Seong-Hoon ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 375~379
DOI : 10.5394/KINPR.2006.30.5.375
The keel attached on bottom of hull part prevents yacht from flowing sideway by sailing posture. The keel remove a heel moment and make the force of stability. The selection of suitable keel is important bemuse it has an influence on the safety. Also the appendage attached on bottom of keel part lower ballast weight center and have influence on hull stability. The optimum shape about the keel is very important. So this study has compared with characteristics of resistance depending on the shape of the lower part of fin keel in the same surface of water submersion, we have attached three different types of models of lower part of fin keels to the model ships using circulating water channel and analyzed resistance characteristics per shape to arrive at the optimum shape of reduction of resistance.
A Questionnaire Survey and Analysis Results for the Education System of Maritime College in K.M.U
Moon Serng-Bae ; Choi Hyun-Kue ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 381~387
DOI : 10.5394/KINPR.2006.30.5.381
Recently maritime colleges in Korea have confronted with many difficulties on account of changes of educational circumstance such as increasing the number of low-wage foreign officers on board Korea-registered vessels, weakening international competitive power, avoiding reaction in the field of 3D occupational category etc. Therefore, We are drawing up a efficient educational system cultivating the well-trained marine officers who will take a more active role in the ear of 21C marine revolution The questionnaire was composed of 5 courses-entrance into a school, classwork, campus life, on-board training, choosing occupations and conducted the questionnaire survey of students in Maritime College in Korea Maritime University. And the analysis was carried out to understand the changes of student`s consciousness structure and find out the problems of current maritime education system.
Analysis of Operational Impact for Separated Gate System in Port Container Terminal
Choi Yong-Seok ; Ha Tae-Young ; Kim Woo-Seon ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 389~396
DOI : 10.5394/KINPR.2006.30.5.389
With the recent port environment, the integration of the separated berth is being actively progressed and the necessity of integration has been strengthening. Therefore, the application of existing gates have to review in order to reduce the truck turnaround time and to distribute the truck traffic volume in port container terminal. This paper analyzed the operation impact both the integrated gate and the separated gates. As the result of the analysis, this study suggests the separated gate system as an efficient design for gate operation considering integration of two individual berth.
Analysis on the Marine Traffic Flow Characteristics for Gamcheon Harbor
Kim Jun-Hoon ; Gug Seung-Gi ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 397~404
DOI : 10.5394/KINPR.2006.30.5.397
Gamcheon harbor was developed as a multipurpose port to mix processing functions of exclusive piers for bulk cargo such as marine products, domestic cargoes. Since the container terminal was opened in 1997, maximum
DWT containership have been incoming and outgoing. However, bemuse the breakwater entrance in Gamcheon harbor is narrow and the crossed vessels are ever-present at breakwater front, marine accident danger is high that grasping traffic characteristics is required in reply. Therefore marine traffic characteristics were analyzed for Gamcheon harbor and Gamcheon approaching waters, included the track and traffic volumes of peak hours period in inbound/outbound and front sea area of the harbor in present.
Investigation into Occupational Disease of Fishing Crew
Kim Jae-Ho ; Jeong Eun-Seok ; Moon Serng-Bae ; Kim Jeong-Gon ; Lee Sang-Woo ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 405~414
DOI : 10.5394/KINPR.2006.30.5.405
The purpose of this study was to find out morbidity rate and pattern of occupational disease and affect of variables related disease of Fishing crew The subjects this study were 624 Fishing crew who took education course in Korea Institute of Maritime and Fisheries Technology. This questionnaire was focused on finding the basic data for prevention of occupational disease and promotion health on the Fishing crew The collected data were analyzed by using descriptive statistics, Chi-square, cross tab by SPSS package. The result of this study are as follow. 1)The morbidity rate within recent 12 months was 70.2%. there were significant differences of occurred disease in age, rank, perceived health status, fatigue symptoms, rest time, workload, overtime duration 2) the more aging(p<0.01), perceived fatigue(p<0.01), workload(p<0.01), overtime(p<0.05) and the less perceived health status(p<0.01), rest time(p<0.01), the higher morbidity rate 3) Considering disease unable to work more than 4 hour, the number of those who had musculoskeletal disease were 20.9%, which revealed the highest rate, digestive disease 14.3%, traumatic disease 13.5%.
Biochemical Analysis of Crew`s Blood and Urine before & after Long-Term Navigation
Ha Hae-Dong ; Moon Serng-Bae ; Jun Seung-Hwan ; Jeong Eun-Seok ; Kim Jae-Ho ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 415~420
DOI : 10.5394/KINPR.2006.30.5.415
Urinalyses have been conducted for 28 crew`s in H University`s training ship and creatine and uric acid turned out to be higher in all ages, which can be inferred that board job has caused negative impact on kidney and/or malfunction In addition, TC and HDL-C, LDL-C ha; decreased, however, TG has increased after the navigation. All different positions including officer, crew, decker, engineer and radio part showed the similar pattern TC and HDL-C has decreased in 30s, 40s and TG has increased in 30s. A few of the 30`s show extremely high TG rates so hyperlipidemia is suspected. 7 members turned out positive for UBG test and 5 positive for PRO test. Especially there was only one UBG positive before the navigation but, 7 members has become positive, which means the one-month long-tenn navigation has definite impact on the liver cell function.
Analysis of the Law and System for Crew`s Occupational Illness
Lee Sang-Hyoun ; Jun Seung-Hwan ;
Journal of Navigation and Port Research, volume 30, issue 5, 2006, Pages 421~426
DOI : 10.5394/KINPR.2006.30.5.421
Recently, with economic growth and changes of recognition, the many research into vocational disease is in the process of advancing inside and outside of the country and it follows in research and also produce satisfactory results. However, as compared to the crew s service environment, system research into the occupational illness occurring in embarkation service is not accomplished After attacking the occupational illness, only the research to the compensation is conducted Therefore, this study examines law and system of the occupational illness based on basic research into crew`s occupational disease and after disease preventing and attacking of the crew, give some legal reform measures to support quick and appropriate.