• 대한공업교육학회지
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• v.33 no.2
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• pp.154-169
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• 2008

The purpose of this study was to develop learning model turtle boat of teaching-learning materials in order for the students to enhance knowledge, skill and attitude and give interest in transportation technology, and also to recognize the legacy of Korean history. The model turtle boat was developed through three major phases; preparation, development and improvement. The main results of this study were as follows: First, the model turtle boat was developed for students to cultivate design, fabrication, process abilities, and also technological literacy by experimenting and fabricating for themselves. Second, the learning model turtle boat developed is equipped with the sail using natural energy, the linkage and screw applying a mechanical energy and solar cell using solar energy among driving energy. Third, in order to increase interest and attitude regarding a ship in transportation technology, the model turtle boat was developed for students to be able to operate with wireless transceiver on water. Fourth, the model turtle boat was developed to apply the teaching and learning materials for the classes of experiment and practice in primary and secondary schools.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.10a
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• pp.347-348
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• 2014

In this paper, we describe the methods for quantitative evaluation of placement of aids to navigations (AtoN). AtoN is the additive devices for navigation that inform navigators using human vision and guide navigators to safe watercourse. Therefore the effectiveness of placement of AtoN can be quantified according to the grade of visibile recognition to navigators. In order words, the placement of AtoN can be quantified in the sense of visibility. In this study, we describe the methods for quantifying the visibility about the placement of AtoN. Using AtoN simulator which has been developed by Korea Research Institute of Ships and Ocean Engineering (KRISO), the quantitative method is investigated for the pre-installed placement of AtoNs.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.05a
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• pp.263-266
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• 2017

Numerous maritime safety technologies and systems are being developed to support safe navigation at Sea. e-Navigation is a representative system for maritime safety. It is being developed to maximize the ships safety by applying most maritime safety technologies. The e-Navigation system is being developed by the International Maritime Organization (IMO) with the aim of introducing it by 2019. South Korea has already recognized the importance of maritime safety support technology and is actively introducing e-Navigation. Korean e-Navigation is being designed to provide diverse functions for maritime safety, such as providing an optimal safe route, risk analysis, and weather information. Service modules that provide e-Navigation's each function use different types of data that are difficult to configure as a single database. In this paper, we analyze the data needed for Korean e-Navigation, the data service system structure and types that can effectively support it.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.60-61
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• 2013

One of the most important indicators for measuring service level and productivity of the port may be a demurrage rate. Currently, in the case of grain terminal of Busan North Port, demurrage rate are recognized at a very high level, in order to improve this, it is tilted more effort operational. In order to reduce the demurrage, there is a way expansion of facility of hardware, such as the replacement of aging equipment, and how manipulative assignment rules of the apparatus of the operation on the software side, such as changing the order of facility allocation. If the financial reasons are out of question, it is possible to expand to reduce the demurrage rate by operational way. Therefore this paper deals with how to operate some of the allocation rules and silo allocation rules of equipment to reduce the work hours with model and how to operate basic equipment and grain terminal of Busan North Port want to be seen by comparative analysis.

• Journal of Korea Port Economic Association
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• v.25 no.3
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• pp.303-320
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• 2009

Korea has achieved a remarkable growth by pursuing externally-oriented growth policy since 1960s. That is, we imported raw materials and spare parts, manufactured them into products and exported them, which led to successful economic development. Therefore, our marine business has played an important roles as one of key industries. The development of marine business has contributed to efficient distribution and cost reduction in addition to production of added value and creation of employment creation, which improved external competitive power. In spite of economic importance of marine business, national perception on it is in general low and its developmental conditions are considerably poor. Therefore, this study aims to speculate the effect of Port-related business on regional economy using regional input-output tables.

• Maritime Security
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• v.3 no.1
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• pp.115-140
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• 2021

The South China Sea is a significant maritime shipping route with abundant submarine and fishing resources. Over 40,000 ships pass through the South China Sea every year, constituting around 50% of global shipping and 66% of crude oil. In particular, 30% of Korea's import cargo and 90% of energy imports pass through this body of water. The US and China realized the significance of this sea area from early on and are embodying national interest through maritime security at the national strategic level by implementing the 'Indo-Pacific' and 'One Belt One Road' strategies, respectively. Such geopolitical conflicts are manifested in the 'freedom of navigation operations' by the US in the South China Sea. Despite its significance, there is a lack of studies in Korea on the freedom of navigation operations, and most previous studies only focus on analyzing international law and agreements. This article examines the origin and background of the strategic perception of the freedom of navigation operations and derives implications for the peace and security of the Korean Peninsula as the strategic competition between the US and China continues.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.17 no.3
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• pp.130-140
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• 2024

In this paper, we present a method of applying the kalman filter to control and correct errors in camera sensor recognition depending on the sea state environment. First, the specifications of the ship were described and the degree of error due to rolling was measured. After presenting the distance from the surface of the water to the sidelight required for simulation through PKMR-211, the ship selected as the model, error correction was performed using the camera error value as a variable in the feedback control system. In the experiment, the degree of rolling of the ship was expressed as variables 𝛼 and 𝛽, expressed in angles, and the angle change according to distance was compared. When comparing the error before and after applying the kalman filter in sea state 4, it decreased from +1.5556° to -1.1544° in red light regardless of distance, and the same result was confirmed in green light. Through this, calculations were performed considering the movement of the ship according to the maritime environment, and the future maneuverability of the ship was presented after error correction.

• Korean Security Journal
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• no.13
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• pp.507-528
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• 2007

June 2006, five korean oil workers, three who worked for Daewoo and two for Korea Gas, released after being held hostage by separatist militants in Nigeria. The kidnapping was happened in the Niger Delta where armed separatists are demanding a larger share in oil revenues and compensation for environmental destruction due to oil exploration. Seven months later, nine Korean pipeline workers of Daewoo together with a Nigerian were kidnapped again and safely released thanks to the efforts of the company and the Korean government. These two kidnapping incidents have shown that companies engaged in the overseas business are not safe any more from the terrorist attacks and has given an invaluable lesson that the company having an intention to go abroad for business should take all possible anti and counter-measures against terrorism. The main purpose of this study is to suggest a guideline for the establishment of counter-terrorism and security strategy against terrorist attacks on the private companies at the overseas. In order to foster a better understanding of the problem, a brief history of terrorism is presented in the first part. In addition, this study analyses and describes the variations of terrorist attacks against private companies together with the terrorism related environment of Korea. Based on the outcome of the study, this paper takes a global view and perspectives of terrorist attacks against private companies and suggests consideration for the future.

• Journal of Navigation and Port Research
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• v.41 no.3
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• pp.119-126
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• 2017

As container vessels get larger, container terminals are also likely to grow. The problem that arises is that the growing volume should be handled in the same amount of time as before. Container terminals are introducing an automation system in order to overcome the limitations of existing manual methods and to continuously reduce operating expenses. Because, Manual handling of carrying containers gate in and out of terminals causes inaccurate data, which results in confusion. An alternative is for containers to be labeled with barcodes that can be scanned into a system with a scanner, but this takes quite a long time and is inconvenient. A RFID system, also known as a gate automation system, can solve these problems by reducing the time of gate management with a technology that detects number identification plates, helping operators more efficiently perform gate management work. Having said that, with this system, when container damage is detected, gate operators make and keep documents manually. These documents, which are insufficient evidence in proving container damage, result in customer claims. In addition, it is difficult for gate operators and other workers to manage containers, exposing them to danger and accidents. This study suggests that if an automation system is introduced at gates, containers can be managed by a video storage system in order to better document damage The video system maintains information on container damage, allowing operators the ability to search for videos they need upon customer request, also allowing them to be better prepared for customer claims. In addition, this system reduces necessary personnel and risk of accidents near gates by integrating a wide range of work.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2000.05a
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• pp.410-418
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• 2000

In general, the experienced diver go into the water to find out Pan Shell which is spontaneously generated and brought up at the depth of 25-30 meters in the slime along the bank of an inlet of western and southern sea. However, this searching system has caused some problems in terms of economical efficiency and riskiness of diver. To overcome such problems and enhance the competence capability of fishermen, a new Pan Shell searching system is required. If an onboard searching system as a substitute of the way of diving into the deep water to identify the existence of Pan Shell is developed, it would be greatly beneficial to fishermen. The purpose of this research is to develop a new searching system of Pan Shell by making use of 50-200 Khz Ultra Sonic Signal, A/D Converter and computer process program. Based on the fact that Sonic Signal between the soft part of slime and the hard part of sand, pebble and Pan Shell is different, the possibility of this system have been approved in some degree by this time of research. However, to utilize this new system, further research on the establishment of data base and sample data is required. With the theoretical knowledge, the systematic research on the searching capability of Ultra Sonic Signal will be continued to identify the influence against the sea water subject. In this research, signal will be analyzed according to the influence range, power and sensitiveness of Ultra Sonic Generator. In addition, the radius of Ultra Sonic Signal will be included. The experimental field work will be executed at Nockdong, Pulkyo and other places well known as a habitat of Pan Shell.