• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.3
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• pp.90-95
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• 2018

The Korean Peninsula is no longer safe from volcanic disasters. Therefore, the Korean government has been developing a spatial information-based system implementation technology since 2014. VDRS (Volcanic Disaster Response System), which is the result of the technology, was implemented in 2016 as Phase I. Since then, phase II implementation technology has been developed for an advanced system reflecting the user's requirements. To advance the system, redesign architecture is essential. This paper examined the redesign application architecture for an advanced VDRS. First, existing application architecture, which was implemented in phase I, was analyzed. Second, the user's requirements for advanced VDRS were analyzed. The analyzed user's requirements were categorized as a transforming service oriented to a business-oriented architecture, improving accuracy, and expanding the spatial range and target disaster. Third, application architecture was redesigned based on gap analysis between the existing architecture and user's requirements. The results of the proposed redesign architecture are presented as the application system structure and description of the application function based on owner's point of view in the enterprise architecture. The results of this paper can be used to derive the application module design and provide a detailed description of the application module based on the designer's point of view. Further research focused on structuring the HW/SW architecture will be required for system implementation.

• Journal of the Korean Society of Safety
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• v.22 no.6
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• pp.74-80
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• 2007

In manufacturing industry, machining technology for metal cutting processes has been considered traditional and economic dimensions such as production cost, production time and quality of a final product. However, owing to governmental regulations and the change of owner's cognizance, the safety of the workers becomes important in those fields. In this paper, the operation planning system developed as a key component of CAPP(Computer Aided Process Planning) system is introduced for milling operations. The main issue in the system is to determine the cutting conditions in achieving a balanced consideration of productivity and worker's safety. For this reason, the system performs the modification process of standard cutting conditions to satisfy those requirements. Related to machining safety in metal cutting, representative and habitual mistakes that operators perform without considering carefully the characteristic of machine or work piece are described and then the detailed algorithm and functions of the developed system is introduced and discussed.

• Journal of Navigation and Port Research
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• v.32 no.3
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• pp.237-244
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• 2008

The General Conference of International Labour Organization adopted the Maritime Labour Convention, 2006 which created a single, coherent instrument embodying as far as possible all up-to-date standards of existing international maritime Conventions and Recommendations in its Ninety-fourth session on 23 February 2006. This Convention prescribes the social security for seafarers in the Regulation 4.5 in the Title 4. Regulation 4.1-Medical care on board ship and ashore and Regulation 4.2-Shipowner's liability are related to social security for seafarers. For the purpose of ratifying this Convention in our country, first of all, it is necessary to review the domestic laws and regulations concerned whether they fulfill or not the requirements of the Convention and have to make preparation insufficient sections. Therefore, this paper aims to find out different regulations between the domestic law and the Convention, as to be able to accept the requirements regarding the social security of the Convention, also suggest the solution on problems derived in this process.

• IE interfaces
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• v.12 no.2
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• pp.319-328
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• 1999

Today, offshore design field is concerned with system integration such as CIM(Computer Integrated Manufacturing), PDMS(Product Data Management System) and EDMS(Engineering Data Management System) in order to cope with the change of engineering specification as owner's requirements during construction stage of the project. This paper deals with the case study that describes about the efficient interface between material control system and 3D CAD system to support the design process in offshore industry using design rules involved the designer's knowledge. In this paper, we constructed an information system, called knowledge-based CAD interface systems, which is composed material code management system and 3D specification generator which automatically creates 3D catalogue anti specification by linking the material code, called short code, and the specification components of the 3D CAD system. As a result of the construction, it is possible to maintain consistency of the design process, and through reduction of the design processing time and improvement of the design process, competitiveness is improved.

• Journal of KIISE
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• v.42 no.9
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• pp.1133-1146
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• 2015

This paper examines how a Computer Engineering Graduate student team ran their Advanced Software Engineering Capstone project using SCRUM. The environment provided contextual challenges in terms of the on-site customer and upfront requirements document, not uncommon in a document driven single-step methodology. The paper details the methodology and practices used to run the project, and reflects on some of the challenges faced by the members of a typical software team when transitioning to a SCRUM process. The paper concludes by evaluating the success of the techniques and practices compared to the Agile Manifesto and Henrik Kniberg's Scrum checklist. The project was undertaken at South Korea's Ajou University.

• Journal of the Society of Naval Architects of Korea
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• v.56 no.2
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• pp.117-127
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• 2019

Vessel's ice speed performances will be verified in ice sea trial but environmental conditions of ice fields are changeable according to the weather condition of ice trial area. Speed performance has to correct in the no wind, wave and current etc. after sea trial. Especially finding ice fields which is exact the same as owner's ice thickness and strength requirements is not easy. Therefore speed correction according to environment condition has to be done after sea trial measurements. Correction methods for ice thickness, ice strength, wave, wind and ship draft, trim, ice drift etc. are checked in ice sea trial based on literature review such as ISO standard, ITTC recommendation, journal papers and proceedings of conferences. Possibility of application for current and ice drift correction in ice field are discussed and measuring schemes and procedures of correction methods are described in this paper. All of correction schemes are calculated for 'Araon' which is ice breaking research vessel with Arctic and Antarctic ice field test results. Analyzed results shows that Araon is satisfied with her official ice speed performance of 3 knots with 10MW power at 1m ice thickness, 570kPa ice flexural strength.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.5
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• pp.2628-2645
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• 2017

This paper proposes a new offline electronic payment (e-payment) system that satisfies the major security requirements of e-payment, i.e. anonymity, unlinkability, unforgeability, double spending control, conditional traceability, and fraud prevention. The central idea is the use of Hwang et al.'s RSA-based untraceable blind signature (BS), which disables the link between the e-coin and its owner and ensures the anonymity of both the customer and the merchant. It attaches an expiration, a deposit and the transaction dates to each e-coin in order to manage the database of the bank effectively, to correctly calculate the interest on the e-coin and to aid arbitration if a dishonest customer attempts to double-spend the coin. It also ensures the anonymity of the customer as long as the coin is spent legitimately. Only when a fraudulent e-coin transaction is detected can the bank, with the help of the central authority (a trusted entity), determine the identity of the dishonest customer. The system is referred to as offline since the bank does not need to be concurrently involved in transactions between a customer and a merchant. Finally, analyses of the performance of the prototype and the primary security requirements of the proposed system are also presented.

• Journal of the Korean Society for Library and Information Science
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• v.48 no.1
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• pp.387-413
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• 2014

The purpose of this paper is to understand copyright exemption for libraries including Copyright Act Article 31. Especially, it is focused on the impacts on fair use article which is recently introduced in Korean Copyright Act. It looks into completely copyright exemption which libraries can make use of. And then it also rearranges the resources which library can use without the copyright owner's permission. Further, it explores the meanings of fair use and the detail requirements for adoption to library services. And it analyzed some cases which can be applied substantially for library services.

• Journal of the Society of Naval Architects of Korea
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• v.46 no.3
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• pp.362-371
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• 2009

Shipbuilding is a typical 'build to order' industry. It has a business model that generates revenues from building various ships and offshore products in accordance with owner's requirements at each production stage. Under uncertainty in shipping market, it is very essential for the shipbuilder to prepare the fast and competitive decision for product portfolio strategy in order to maximize contribution margin by exploiting production facilities and constraints. In this study, we introduce the unique decision supporting methodology for the optimal product portfolio sets based on Theory of Constraints(TOC). This methodology is established by adopting the concept of Drum Buffer Rope(DBR) in constraints planning and Throughput Accounting (TA) in management accounting of TOC. In addition, Decision Supporting System(DSS) is implemented. This DSS system provides a throughput estimator with reflecting the cost structure of shipbuilding industry and a resource simulator built on heuristic algorithms to operate major constraint-resources in shipyard such as dock, quay and pre-erection area etc. Several examples are presented to show that the proposed methodology and system can effectively support the strategic decision-making process of a global shipbuilding company.

• Transactions of the Korean Society of Pressure Vessels and Piping
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• v.17 no.1
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• pp.49-55
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• 2021

In this paper, an application example for fitness-for-service of material is shown. A kind of instrument valve is made of austenitic stainless steel fabricated by the cold working process. The tensile strength of the cold worked austenitic stainless steel has to be limited under 90 ksi to prevent the stress corrosion cracking in power plants. In industrial fields, tensile strengths of some materials were discovered to be over the regulation requirements in a certified material test report (CMTR). Owner's verification tests were performed to compare with that in a CMTR and to check the appropriateness. It is found that, in the case of verification test under the required test speed, valve materials could be used in the field. Although it is only one application sample of material check process in the power generation site, this case study could show an importance of basic experimental technology in academia and research circles.