• 한국군사과학기술학회지
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• 제26권2호
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• pp.179-187
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• 2023

APT cyber attacks have been a problem for over a past decade, but still remain a challenge today as attackers use more sophisticated techniques and the number of objects to be protected increases. 'Cyberattack Tracing System' allows analysts to find undetected attack codes that penetrated and hid in enterprises, and to investigate their lateral movement propagation activities. The enterprise is characterized by multiple networks and mass hosts (PCs/servers). This paper presents a data processing procedure that collects event data, generates a temporally and spatially extended provenance graph and cyberattack tracing paths. In each data process procedure phases, system design considerations are suggested. With reflecting the data processing procedure and the characteristics of enterprise environment, an operational architecture for CyberAttack Tracing System is presented. The operational architecture will be lead to the detailed design of the system.

• 한국컴퓨터산업학회논문지
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• 제2권6호
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• pp.747-758
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• 2001

군 정보체계를 개발함에 있어 선진국에서도 문제 시 되고 있는 체계간의 상호 운용성은 반드시 보장되어야한다. 따라서 미군이 연구한 C4I Architecture Framework 이론과 BPR 기법을 바탕으로 하여 연구한 전술 C4I체계의 체계 종합 구조 중 운용구조를 작성한 과정과 결과를 제시하여 관련 이론 발전에 기여하고자 하였다.

• 한국군사과학기술학회지
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• 제6권3호
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• pp.22-35
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• 2003

This paper describes system technical requirement development process from operational concept using computer-aided Systems Engineering tool(CASysE Tool-CORE). The army tactical missile system-ATACMS's technical requirements are developed by the process as a case-study The scope of the work is context analysis and requirement definition process. The proposed process is as follows. At first, an integrated architecture could be developed from the operational concept. From the integrated architecture a capability needs, which includes KPPs, are generated. And the capability needs expanded according to the Mil-Std-961D format. Lastly, a system technical requirement could be generated automatically from the CASysE Tool-CORE.

• International Journal of Naval Architecture and Ocean Engineering
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• 제12권1호
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• pp.440-454
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• 2020

To prevent pollution from ships, the Energy Efficiency Design Index (EEDI) is a mandatory guideline for all new ships. The Ship Energy Efficiency Management Plan (SEEMP) has also been applied by MARPOL to all existing ships. SEEMP provides the Energy Efficiency Operational Indicator (EEOI) for monitoring the operational efficiency of a ship. By monitoring the EEOI, the shipowner or operator can establish strategic plans, such as routing, hull cleaning, decommissioning, new building, etc. The key parameter in calculating EEOI is Fuel Oil Consumption (FOC). It can be measured on board while a ship is operating. This means that only the shipowner or operator can calculate the EEOI of their own ships. If the EEOI can be calculated without the actual FOC, however, then the other stakeholders, such as the shipbuilding company and Class, or others who don't have the measured FOC, can check how efficiently their ships are operating compared to other ships. In this study, we propose a method to estimate the EEOI without requiring the actual FOC. The Automatic Identification System (AIS) data, ship static data, and environment data that can be publicly obtained are used to calculate the EEOI. Since the public data are of large capacity, big data technologies, specifically Hadoop and Spark, are used. We verify the proposed method using actual data, and the result shows that the proposed method can estimate EEOI from public data without actual FOC.

• 한국통신학회논문지
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• 제33권7C호
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• pp.540-547
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• 2008

본 논문에서는 실시간으로 컴퓨터 생성 홀로그램을 생성할 수 있는 VLSI 구조를 제안하고 하드웨어로 구현하였다. 고속으로 디지털 홀로그램을 생성할 수 있는 수정된 알고리즘을 도입하고, 하드웨어 구현을 위해 재해석하였다. 수치 및 시각적인 정밀도 분석으로부터 하드웨어 내부의 비트 너비를 구하였다. CGH 알고리즘의 분석과 정밀도 분석 결과부터 CGH 셀의 구조를 제안하였다. CGH 셀의 구조와 알고리즘의 특성으로부터 동작 순서를 분석하였고, 파이프라인 구조와 동작적인 타이밍을 제안하였다.

• 한국국방경영분석학회지
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• 제34권1호
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• pp.31-45
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• 2008

본 연구는 시스템엔지니어링적 접근방법을 통한 저고도 방공자동화체계의 운용아키텍처 개발을 기술한다. 미래 전장은 단일전구 내에서 다수의 다양한 센서체계와 슈터체계가 각각의 그리드를 형성하고, 네트워크기반 전장관리에 의해 지휘통제(C2: Command and Control)되는 신복합시스템 개념으로 변화하고 있다. 미래 위협은 UAV나 순항미사일 그리고 전술탄도미사일과 같이 전략적 효과가 큰 무인 항행체의 사용으로 특성화 될 수 있으며, 저고도 스텔스 순항미사일과 같은 새로운 위협이 등장하게 될 것이다. 이러한 미래 위협에 대한 저고도방공 운용개념 설정은 시스템엔지니어링 기반의 복합적이고 통합적인 접근방법이 요구된다. 이러한 관점에서 본 연구는 임무 및 미래 운용환경의 식별을 통해 운용시나리오를 작성하고 운용요구사항을 도출했으며, 컴퓨터지원 시스템엔지니어링도구인 CORE 5.0을 사용하여 네트워크기반의 저고도 방공자동화체계의 운용아키텍처를 제시했다.

• 한국주거학회논문집
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• 제25권3호
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• pp.131-143
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• 2014

The purpose of this study is to develop an operation manual of resident-driven community program by evaluating community program operation to realize a sustainable apartment complex and vitalize a community. To achieve this purpose, 8 community experts, who are in charge of 42 complexes of 7 autonomous districts among 25 districts in Seoul were interviewed from September 2013 to December 2013. Main results of the study are as follows. 1) Operational problems and improvements are deduced from evaluating operation process of community programs. It is found that smooth cooperation of main operators including a community vitalization association, a resident representative meeting and a control office is the most important. 2) Operation guideline for representative programs are suggested based on analysis of operational characteristics of 3 types of community programs; communication, recycling and environment management, according to program operation elements; material element, programming element, human element and finance element. 3) An operation manual of resident-oriented community program is presented after considering evaluation of operation processes and analysis of 3 types of operational elements of community programs.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제28권2호
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• pp.17-29
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• 2022

Purpose: In terms of efficiency and safety, this study attempted to organize data on the operation methods and architectural planning of infectious diseases hospitals. Methods: The results obtained through on-site and interview surveys with hospital officials and medical staffs at four infectious diseases hospitals under construction were summarized based on those original business plans and facility guidelines. Results: First, the operational methods to secure safety and operational efficiency were summarized for each department which are major hospital functions of infectious disease hospitals. Second, as the architectural planning, the characteristics of space and circulation of each department are summarized. For safety of medical staff, negative pressure and non-negative pressure zone have to completely separated. In addition medical staff wears PPE and enters the negative pressure zone and returns in the order of admiral, shower, and gowning in the PPE undressing room after patient treatment. In case of operational efficiency, flexible operation is required in normal and crisis situations. For example, it is important for The Ward to gradually switch to negative pressure beds in times of crisis from normal situation and the outpatient department considers the composition of negative pressure and non-negative pressure outpatient spaces that can operate in parallel even in crisis situations. Implications: Infectious disease hospitals require flexible operation and appropriate facilities for normal and crisis situations.

• 한국멀티미디어학회논문지
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• 제4권6호
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• pp.570-578
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• 2001

경계 주사 구조(Boundary Scan Architecture)기 법은 복잡한 인쇄 회로 기판(PCB : Printed Circuit Board)을 테스트하기 위해 도입되었다. 이러한 경계 주사 구조는 시스템의 정상 동작에 간섭을 주지 않고 시스템의 동작 상태를 실시간 모니터링 하는데 대단한 잠재력을 지니고 있다. 본 논문에서는 경계 주사 구조를 이용하여 시스템의 작동 상태를 실시간으로 모니터 하기 위한 새로운 실장 제어기를 제안하고 설계한다. 제안된 실시간 모니터링 실장 제어기는 경계 주사 구조의 경계 주사 셀 제어기(Test Access Port Controller)와 범용 실장 제어기(Embedded Controller)로 구성되어 있다. 제안된 경계 주사 구조를 이용한 실시간 모니터링 실장제어기는 하드와이어의 자원을 절약해 주고 경계 주사 구조를 지니고 있는 칩에 쉽게 인터페이스 된다. 실험 결과는 제안된 실장제어 기가 시스템의 동작 상태를 실시간 모니터 하는데 호스트 컴퓨터에 의한 모니터 링에 비해 효과적임을 보여준다.

• International Journal of Naval Architecture and Ocean Engineering
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• 제13권1호
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• pp.367-378
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• 2021

This paper develops a dynamic regression model to quantify the contribution of key external factors to operational energy efficiency of ships. On this basis, kernel density estimation is applied to explore distribution patterns of fluctuations in operational performance. An empirical analysis based on these methods show that distribution of fluctuations in Energy Efficiency Operational Indicator (EEOI) is leptokurtic and fat tailed, rather than a normal one. Around 85% of fluctuations in EEOI can be jointly explained by capacity utilization and sailing speed, while the rest depend on other external factors largely beyond control. The variations in capacity utilization and sailing speed cannot be fully passed on to the energy efficiency performance of ships, due to complex interactions between various external factors. The application of the methods is demonstrated, showing a potential approach to develop a rating mechanism for use in the legally binding framework on operational energy efficiency of ships.