• 한국정보과학회논문지:정보통신
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• 제30권6호
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• pp.776-786
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• 2003

보안평가 시스템은 다양한 요소로 구성된 대규모 네트워크 도메인 전체의 보안성을 평가하고 이를 바탕으로 보안 관리자 혹은 보안관리 시스템이 네트워크 보안관리를 수행하는데 필요한 의사결정을 지원하는 시스템이다. 이 시스템은 보안상 취약점들로 인한 공격을 방지하기 위해 어떻게 네트워크의 보안 관련 설정을 해주어야 하는지에 관한 의사결정을 지원해 준다. 보안평가 시스템은 네트워크의 “현재 상태”를 분석하고 공격 가능성을 찾아내어 불법적인 침해 행위를 사전에 예방하도록 보안관리의 의사결정을 지원해 준다. 본 논문에서는 다양한 요소로 구성된 대규모 네트워크의 보안성 평가를 자동화하고 침해사고 예방을 위해 보안관리의 의사결정을 도와주는 보안평가 시스템에 대한 요구 사항을 분석하고 이를 반영한 보안평가 시스템을 설계한다.

• 산업경영시스템학회지
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• 제31권4호
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• pp.121-133
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• 2008

In manufacturing companies, engineering information is a central data which defines a product to be produced. This is changed by various factors such as changes of product configuration, changes of drawings information of a technology's licensor, etc, and these changes essentially accompany the changes of a product BOM (Bill of Materials) structure. Thus, engineering changes gives a heavy burden to information management within enterprise because the changes of product BOM have an influence on each departmental BOM such as a procurement BOM, a manufacturing BOM, a quotation BOM, etc. Especially, these changes of product BOM due to the engineering changes is inevitably and frequently happened by a customer's requirements in a customer-oriented make-to-order manufacturing environments. In these manufacturing environments, information gap among each department from the first contact point of customer to engineering, materials, production, quality, and management is very close, and thus it is very important that the change information of product BOM due to changes of product specification and engineering information are efficiently communicated among each department. This paper describes a procedure of determining product specification and of generating product BOM, and proposes an efficient management scheme for the change process of product BOM information due to changes of product specification and engineering. Also, to show the effectiveness of the proposed product BOM management scheme, a product BOM management system is implemented for the ship engine division of 'H' company, one of customer-oriented make-to-order manufacturing enterprises.

• 한국CDE학회논문집
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• 제13권6호
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• pp.459-468
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• 2008

A web-based Computer-Aided Engineering (CAE) supporting system is connected with a Product Data Management (PDM) system for Small and Medium Enterprises (SMEs) suffering from the lack of building hardware, software and related experts. An analysis of current business models and worksite requirements provides an improved process model and data to be shared between the PDM system and the CAE supporting system. Since all engineering tasks such as geometric modeling, mesh generation, static stress and modal analysis, and fatigue durability analysis are automated in the CAE supporting system, the user in charge of the CAE have only to configure the concerned values of design variables and result data through the web page. The existing Change Management module of the PDM system is modified for seamless data exchange, i.e. sending the Engineering Change Order (ECO) data to the CAE supporting system and receiving the CAE result data bark. The hi-directional data transfers between the PDM system and the CAE supporting system is made possible by adaptors bused on the Simple Object Access Protocol (SOAP). The current approach will be very helpful for SMEs that only have the PDM system and have no adequate infrastructure for CAE.

• 산업공학
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• 제22권1호
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• pp.63-72
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• 2009

This paper considers a transporter scheduling problem under dynamic block transportation environment in shipbuilding. In dynamic situations, there exist the addition, cancellation or change of block transportation requirements, sudden breakdowns and maintenance of transporters. The transportation of the blocks in the shipyard has some distinct characteristics. Some blocks are available to be picked up at a specific time during the planning horizon while some other blocks need to be delivered before a specific time. These requirements cause two penalty times: 1) delay times incurred when a block is picked up after a required start time, and 2) tardy times incurred when a block shipment is completed after the required delivery time. The blocks are located at different areas in the shipyard and transported by transporters. The objective of this paper is to propose a heuristic algorithm based on a network flow model which minimize the weighted sum of empty transporter travel times, delay times, and tardy times. Also, a rolling-horizon scheduling method is proposed for dynamic block transportation environment. The performance of the proposed heuristic algorithms are evaluated through a simulation experiment.

• 대한안전경영과학회지
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• 제16권1호
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• pp.69-77
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• 2014

The environment and requirements of modern war fields have been affected and thus changed by a variety of issues. To this end, the development of safety-critical weapon systems frequently need to meet those changes even in the operational phase. The necessity of the changes may be due to the preparation for mass-production or the request originated from the user military forces. To meet such a need can be even tougher in the development of safety-critical weapon systems since the integration of the requirements for both systems design and systems safety would make it troublesome. To handel the matter in this paper, utilization of architecture DB is proposed. Specifically, the situation in demand has first been analyzed and then a problem-solving process to accommodate the design changes has been constructed. In doing so, the concept of the aforementioned integration is particularly focused on the functional architecture, which could be a core concept of our approach to solving the problem. The result of a case study demonstrating the method studied using a computer-aided systems engineering tool is also presented.

• 한국측량학회지
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• 제27권2호
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• pp.195-202
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• 2009

최근 공간정보의 생성 및 활용은 전통적인 측량분야 뿐만 아니라, CNS 및 ITS 등의 민간분야로 점차 확대되고 있다. 따라서, 공간정보의 정확성과 더불어 최신성이 중요한 요소로 자리잡고 있다. 하지만 현재의 수치지도는 일괄갱신 체계로 갱신되므로 최신성을 확보할 수 없으며, 사용자의 요구사항을 충족하기가 어렵다. 따라서 본 연구에서는 효율적인 공간정보 갱신을 위해 나라장터의 입찰정보를 분석하여 지형지물 변화정보를 관리할 수 있는 관리시스템을 개발하였다. 입찰정보로부터 지형지물의 변화 가능성이 있는 공사를 자동적으로 분류하고 이를 DB화하여 지형지물 변화 예측 정보를 생성하였다. 또한 텍스트형태의 입찰정보를 공간정보 데이터와 연계한 위치정보로 변환하였다. 본 시스템이 향후 안정적으로 구현된다면 수치지도 갱신에 필요한 막대한 금액이 일부 절감될 것이며, 공간정보의 최신성 확보에 많은 기여가 예상된다.

• 정보처리학회논문지C
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• 제11C권4호
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• pp.555-562
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• 2004

근거리 무선 개인 네트워크 시스템 즉, 블루투스의 피코넷을 위한 전력 및 차등 대역폭 할당을 고려한다. 대역폭 요구는 어플리케이션/서비스에 또는 시간에 따라서 변할 수도 있으므로, 제한된 자원을 서비스 요구를 만족하면서 다양한 서비스 클래스로 어떻게 할당할 것인가를 결정 하는 것이 중요하다. 본 논문에서는 다양한 서비스 형태의 대역폭 요구를 만족하면서 전력 절약 모드 (즉, 스니프 모드)에 의해 전력 소비를 절약하는 간단하고 효율적인 대역폭 할당 메커니즘을 제안한다. 기존의 (가중치) 라운드 로빈 폴링 방법과 제안된 메커니즘을 비교하고, 전송율, 지연시간, 전력 소비 측면에서의 성능 향상을 보인다.

• The Journal of Asian Finance, Economics and Business
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• 제7권11호
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• pp.1113-1122
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• 2020

The purpose of this study is to examine how the Indian banks have adjusted their risk-based capital ratios during 2009-2018 to meet the regulatory requirements. Banks can, in principle, increase their risk-based regulatory capital ratio, either by increasing their levels of regulatory capital or by shrinking their risk-weighted assets by adjusting asset growth or risk in the portfolio. We investigate banks' capital behavior by decomposing the change in the capital ratio into the contribution of its components and analyzing their variance across regulatory regimes and banks' ownerships. We further investigate how each component of the capital ratio is adjusted by the banks by breaking down them into balance sheet items. We find that the banks' capital behavior significantly differed between public and private sector banks and between the two regulatory regimes. During Basel II, banks, in general, followed a strategy of aggressive asset growth with increased risk-taking. The decline in the CRAR because of such an expansionary strategy was adjusted by augmenting additional capital. However, during Basel III, due to higher capital requirements, both in terms of quantity and quality, banks followed a strategy of cutting back their asset growth and reducing the risk in their portfolio to maintain their CRAR.

• 한국농공학회논문집
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• 제54권5호
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• pp.123-128
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• 2012

For optimal reservoir operation and management, there are essential elements including water supply in agricultural reservoir and demand in irrigation district. To estimate agricultural water demand and supply, many factors such as weather, crops, soil, growing conditions cultivation method and the watershed/irrigation area should be considered, however, there are occurred water supply impossible duration under the influence of the variability and uncertainty of meteorological and hydrological phenomenon. Focusing on agricultural reservoir, amount and tendency of agricultural water supply and demand shows seasonally/regionally different patterns. Through the analysis of deviation and changes in the timing of the two elements, duration in excess of water supply can be identified quantitatively. Here, we introduce an approach to assessment of irrigation vulnerable duration for effective management of agricultural reservoir using time dependent change analysis of residual water supply and irrigation water requirements. Irrigation vulnerable duration has been determined through the comparison of water supply in agricultural reservoir and demand in irrigation district based on the water budget analysis, therefore can be used as an improved and basis data for the effective and intensive water management.

• 한국경영정보학회:학술대회논문집
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• 한국경영정보학회 2008년도 춘계학술대회
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• pp.428-433
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• 2008

The online advertising industry's business model undertakes the change from CPM (cost-per-mille)-based to CPC (cost-per-click)-based. However, due to the problem of 'Click Fraud', CPA (cost-per-action) has been regarded as a new step. For CPA, publishers need to get information after a user clicks an advertisement. Therefore, in CPA, the key is to get Conversion Action Data (CAD). This paper introduces two existing mechanisms for getting CAD, compare their characteristics, and analyze their limitations. Then the two new mechanisms are introduced and their requirements and feasibility are analyzed. Lastly, we compare the existing two and the new two mechanisms, and point out each mechanism's business possibility, value and Application Area. This paper will help publishers choose the most appropriate mechanism on the basis of their situation.