• 인터넷정보학회논문지
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• 제25권1호
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• pp.123-136
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• 2024

사이버보안 정책을 선도하는 미 국방부의 사이버보안 제도는 크게 2가지 방식으로 대외 군납업체 보안인증을 위한 CMMC와 내부기관대상 보안평가를 위한 RMF가 있다. 우리 군의 경우, 2026년부터 한국형 RMF(K-RMF)를 적용할 예정이다. 더불어 미 국방부가 발주하는 사업에 참여하는 국내 방산업체들은 2025년 10월전까지 CMMC인증을 사전 취득해야 하는 입장에 있다. 본 논문에서는 CMMC와 RMF 보안감사 준비업무를 동시에 지원할 수 있는 새로운 표준 컴플라이언스 메타모델(R3C) 개발방법론과 R3C메타모델을 기초로 한 컴플라이언스 솔루션 구현 결과물에 대해 소개하고 있다. 본 연구는 2022년 이후 국방부 합동참모본부 주관 한/미 국방 사이버보안 업무지원 자동화 솔루션 개발프로젝트를 수행하면서 얻은 미 국방 사이버보안 제도에 대한 실무 노하우를 토대로 진행되었다. 개발된 컴플라이언스 솔루션기능은 한/미 연합모의훈련 실무에 활용되고 있다. 본 연구를 통해 개발된 컴플라이언스 솔루션은 민간에도 제공할 예정이며, CMMC인증을 취득해야 하는 국내 방산업체에게 매우 유용하리라 예상한다.

• 디지털산업정보학회논문지
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• 제19권2호
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• pp.103-120
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• 2023

This study is to confirm whether SMEs can manage production facilities well and receive help in establishing new product development strategies if they actively engage in external networks. And under this influence, it is to check whether sales growth and financial performance improve. After reviewing the literature and theory, an empirical analysis using the questionnaire method was conducted to verify the research model. To verify statistical significance, programs 'SPSS 20.0' and 'Smart PLS 2.0' were used. The results of the study are summarized as follows. First, the higher the level of technical cooperation external networking of SMEs, the higher the level of management of their production facilities and new product development strategy was confirmed. Second, it was confirmed that the higher the level of production facility management and new product development strategy of SMEs, the higher their financial performance. Third, among the external networking levels of SMEs, the factor that has the greatest influence on management level of production facilities was identified as degree of participation in human network activities to secure technology. And the factor that had the greatest influence on level of new product development strategy was identified as participation in joint research and commissioned research.

• Journal of Advanced Marine Engineering and Technology
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• 제18권5호
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• pp.68-77
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• 1994

The authors apply the transfer influence coefficient method to the 3-dimensional vibration analysis of beam with multi-joints and formulate a general algorithm to analysis the longitudinal, flexural and torsional coupled free vibration. In this paper, the structure, which is mainly founded in the robot arms, cranes and so on, has some crooked parts, subsystems and joints but has no closed loop in this system. It is modeled as the beam of a distributed mass system with massless translational, rotational and torsional springs in each node, and joint elements of release or roll at which node the displacement vector is discontinuous. The superiorty of the present method to the transfer matrix method in the computation accuracy was confirmed by the numerical computation results. Moreover, we confirmed that boundary and intermediate conditions could ve controlled by varying the values o the spring constants.

• 공학교육연구
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• 제13권5호
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• pp.66-71
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• 2010

Recently, engineering work become very important for the leaders of the information society for the future knowledge in the 21st century and the goal of engineering education is to prepare people to practice engineering as a profession and also to spread technological literacy, increase student interest in technical careers through science and math education. The College of Engineering (COE) of Korea Maritime University (KMU) aims to be the center of both IT-related high industrial technology and the industries related to port, shipbuilding and the ocean. Especially COE focuses on the educational principles to contribute to the development of the country and the regional communities by educating specialists that have international competitiveness. With the need to expand international collaboration in terms of engineering work, it is proposed to initiate a new state of the Asian-Pacific body of engineering conference. To the extent possible the basic discussion was made to expose elements and supports as full-scale illustration of the engineering conference. The result is a body that evokes multi agreement and joint declaration among members.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.1514-1517
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• 2005

In recent years, as the demands of VBNS(Very high speed Backbone Network Service) and VDSL(Very high-data rate Digital Subscriber Line) increase, the development of kernel parts of optical communication such as PLC(Planar Light Circuit), Coupler, WDM elements increase. The alignment and the attachment technology are very important to fabricate the optical elements for communication. In this paper, the mechanism of rotational stage are studied. with the three different method and the results of them are applied to the design of the system. The performance test of resolution and travel is performed.

• 한국해양공학회지
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• 제1권1호
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• pp.73-83
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• 1987

한국형 해저원유 초기생산 시스템은 제주도 남쪽의 한.일 공동개발구역 및 이와 유사한 조건의 지역에서 소규모 유전이 발견되었을때, 빠른 시간내에 저렴한 초기투자비로 석유를 생산할 수 있도록 개발되었다. 이 시스템은 원유저장용 선박, tower, yoke, gravity base 및 원유처리장치들로 구성되어 있으며 각 구조믈들은 pin 또는 universal joint들로 연결되어있다. 본 구조물의 파도중에서의 동적거동은 전산 program을 이용하여 구하여 wave tank에서 수행된 실험의 결과와 비교, 검토하였다. 그리고 이들 결과를 이용하여 구조적 안전성을 검토하였으며, 설계, 해석 및 model test의 결과들은 선급협회의 승인을 받았다.

• Journal of Advanced Marine Engineering and Technology
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• 제27권2호
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• pp.238-245
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• 2003

To overcome the weakness in the load capacity of conventional robot manipulators actuated by motors with the speed reducer such as the harmonic driver, we proposed a new closed-chain type of the robot actuator which is composed of the four-bar-link mechanism driven by the ball screw. The robot manipulator is revolute-jointed and composed of four axes. The base axis is actuated by the lineal actuator such as the ball screw, and the others are actuated by the proposed actuator. We analyzed the mechanism of the actuators of the robot joints, and developed the dynamics model. The dynamics are expressed in the joint coordinates and then they are mapped into the sliding coordinates of the ball screw. We performed fundamental tests on the structure of the robot.

• Journal of Advanced Marine Engineering and Technology
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• 제21권3호
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• pp.256-266
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• 1997

The authors apply the transfer influence coefficient method to the 3. dimensional vibration analysis of beam with multi - joints and formulate a general algorithm to analyse the longitudinal, flexural and torsional coupled forced vibration. In this paper, a structure which is mainly found in the robot arms, cranes and so on, has some crooked parts, subsystems and joints, but has no closed loop in this system. It is modeled as the beam of a distributed mass system with massless translational, rotational and torsional springs in each node, and joint elements of release or roll at node which the displacement vector is discontinuous. The superiority of the present method to the transfer matrix method in the computation accuracy was confirmed from the numerical computation results. Moreover, we confirmed that boundary and intermediate conditions could be controlled by varying the values of the spring constants.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2003년도 추계학술대회
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• pp.143-148
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• 2003

In recent years, as the optical Communication systems are developed, the demands of essential parts such as splitter, coupler, WDM, and AWG filter are grow rapidly. The fabrication process for them is not, however, automatic. On that reason, the automation is needed for the grow of productivity. The optical alignment and attach ment is the core process in fabrication. In this paper, the 6-axis rotary stage for multi-channel optical alignment system is developed and the dynamic characteristic of this system is studied.

• 한국공작기계학회논문집
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• 제17권1호
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• pp.150-157
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• 2008

Bellows are commonly used in piping systems to absorb expansion and contraction in order to reduce stress. Unlike most piping components, bellows consist of a thin-walled shell of revolution with a corrugated meridian, in order to provide the flexibility needed to absorb mechanical movements. It is a composite shell structure consisting of at least one toroidal shell, an annular plate or conical shell. It is difficult to analyze the behavior of bellows because of its complex geometry. Simplified formulas for variable mechanical behaviors of bellows are provided by a standard called EJMA. An automatic design software for bellows is programming by using VBA(Visual Basic for Application) based on EJMA. Bellows engineers can effectively make a decision for bellows geometries because this software provides graphically design results in its post-processor. Bellows design software is expected to give quite a good guidance to practical design. The characteristics of bellows are also investigated through the automatic design process in bellows design software.