• 시스템엔지니어링워크숍
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• 통권4호
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• pp.86-89
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• 2004

A web-based program life-cycle management(PLM) system is introduced to implement the system engineering processes and to provide the development teaceability online. This information system aims for the realization of essential system engineering management techniques currently applied to the space launch system development program including management of configuration and data based on the work breakdown structure(WBS), WBS, bill of materials and properties. The system enhances communication and gives access to the development data with relevant information such as data-to-data relation and approval status/history through the web, and preserve all of the development data throughout the program life-cycle. Further improvement of the system is planned to implement the program managrment pricesses and to provide integrated information useful for the programmatic decision making.

• 한국정밀공학회지
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• 제26권8호
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• pp.104-111
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• 2009

In this paper, the gear design program is presented. The profile of gears is created using classical mathematic formulations. In each gear, a kinematic joint is applied and one can define the 20 contact condition between gear pairs. Initial and boundary conditions such as force, torque, velocity, acceleration, etc. can be set. Thus, it is possible to analyze dynamic characteristics of gear pairs such as reaction moment and the variation of angular velocity. In order to find the optimal profile of gear pairs, two optimization methods based on design of experiments are inserted in the program; One is the Taguchi method and the other is the response surface analysis method. To verify the program, the rack & pinion gear is created and analyzed. Simulation results show that the developed program is useful and result data is reliable.

• 시스템엔지니어링학술지
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• 제13권1호
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• pp.73-78
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• 2017

Space development program is a large and complex system consisting of a multi-disciplinary high-end technologies and it is important to implement a program management system connected with systems engineering as well as to develop critical technologies. Major organizations in space fields carry out effective budget execution management and operation according to the strategy and objective of space development using information systems. Korea Space Launch Vehicle II(KSLV-II) has adopted a cost management plan using a system engineering to complete the program within the assigned schedule and budget. This paper introduces the budget execution management system applied to KSLV-II budget management and the budget execution dashboard system for supporting program decision making.

• Journal of information and communication convergence engineering
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• 제2권4호
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• pp.233-236
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• 2004

This paper shows the easy way to composite a music for non-musicians. Namely, only select a chord and put it to special program which called "the chord composition program", and then the composition program creates the rest chords. After doing this process, non-musicians overwrite their own melodies in accordance with created chords. Finally, they can perform their own music with the sound of master-keyboard and other sound sources by using the band-in-a-box program.x program.

• 한국정밀공학회지
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• 제20권8호
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• pp.126-134
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• 2003

In this study we do for the thing to develop automatic geometry design program of a mechanical element that we have used in CAD/CAM system. The program, which produces automatically three-dimensional surface and a solid model that have been used in CAD/CAM system, widely create automated two and three-dimensional model to by inputting several necessaries for a design, fur the design element. It is emphasized if you are just a beginner having only basic knowledge of the mechanical engineering, you might be able to design easily a three-dimensional model. The software to be used to develop automatic geometry design program is visualLISP to be a developer program of AutoCAD.

• 항공우주시스템공학회지
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• 제9권3호
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• pp.39-46
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• 2015

An integrated simulation program for an artificial satellite's operation has been developed. The program integrates and simulates orbit mechanics, attitude control, power/energy transition and mass variation. In the early stages of satellite development, this program can be used as a communication tool among design engineers of different fields. As a result, the efficiency to design a satellite is expected to increase. This program has been coded by Modelica language which supports acausal and object oriented programming methods. Libraries are developed for satellite simulation, and simulation results are presented.

• 공학교육연구
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• 제23권6호
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• pp.40-50
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• 2020

This paper proposes learning modules as a kind of integrated instruction model for soft skills program outcomes to enable CEA. Learning modules consist of course learning objectives(outcomes) described in detail, learning content(elements), learning activities(teaching learning methods), evaluation methods, evaluation rubrics so that they can be evaluated based on the performance criteria of the program learning outcomes. The unit of time for the learning module is 50 minutes. If this learning module is applied, it is expected that the soft skill program outcomes can be evaluated in the technical course. As a result of the expert feasibility study, the positive answers were much higher than the negative answers in most of the questions about the composition of the learning module or the method of managing the class.

• 공학교육연구
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• 제14권4호
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• pp.69-77
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• 2011

공학인증 운영 프로그램에서는 프로그램 학습성과를 달성하기 위한 도구로서 교과과정과 비교과과정을 운영하고 있다. 교과과정의 경우 프로그램 소속 학생들이 많은 시간을 할애한다는 점에서 이를 통한 프로그램 학습성과가 달성되기를 기대한다. 하지만, 교과과정만으로 이를 달성하기는 어려운 일이다. 따라서 비교과과정 운영을 통해 교과과정에서 달성도가 떨어지는 학습성과의 달성도를 높이려는 움직임들이 있다. 본 연구에서는 프로그램 학습성과 운영 및 평가 시 교과과정만으로는 달성하기 어려운 소프트 스킬에 대한 대체로서 비교과과정 운영에 대한 사례를 조사 분석하였다. 국내 40개 인증 프로그램의 비교과과정 운영 현황을 조사한 비교과과정 운영 사례를 바탕으로 총 30개의 비교과과정을 발굴 정리하고 각 과정별 학습성과 평가단위와 가중치를 제안하였다.

• Biomolecules & Therapeutics
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• 제31권6호
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• pp.599-610
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• 2023

According to recent evidence, ferroptosis is a major cell death mechanism in the pathogenesis of kidney injury and fibrosis. Despite the renoprotective effects of classical ferroptosis inhibitors, therapeutic approaches targeting kidney ferroptosis remain limited. In this study, we assessed the renoprotective effects of melatonin and zileuton as a novel therapeutic strategy against ferroptosis-mediated kidney injury and fibrosis. First, we identified RSL3-induced ferroptosis in renal tubular epithelial HK-2 and HKC-8 cells. Lipid peroxidation and cell death induced by RSL3 were synergistically mitigated by the combination of melatonin and zileuton. Combination treatment significantly downregulated the expression of ferroptosis-associated proteins, 4-HNE and HO-1, and upregulated the expression of GPX4. The expression levels of p-AKT and p-mTOR also increased, in addition to that of NRF2 in renal tubular epithelial cells. When melatonin (20 mg/kg) and zileuton (20 mg/kg) were administered to a unilateral ureteral obstruction (UUO) mouse model, the combination significantly reduced tubular injury and fibrosis by decreasing the expression of profibrotic markers, such as α-SMA and fibronectin. More importantly, the combination ameliorated the increase in 4-HNE levels and decreased GPX4 expression in UUO mice. Overall, the combination of melatonin and zileuton was found to effectively ameliorate ferroptosis-related kidney injury by upregulating the AKT/mTOR/ NRF2 signaling pathway, suggesting a promising therapeutic strategy for protection against ferroptosis-mediated kidney injury and fibrosis.

• 공학교육연구
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• 제11권2호
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• pp.25-31
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• 2008

경상대-피츠버그주립대학교, 경상대-오하이오주립대학교 간의 국제교류 프로그램은 글로벌 공학 교육을 위해 개발된 프로그램이다. 피츠버그 주립대학교와 SAE Baja 프로그램과 공학경영 프로그램을 각 학기별로 구성하였으며, 오하이오 주립대학교와 기계공학 프로그램을 수행함으로써, 어학 향상을 이룸과 동시에 종합설계, 공학경영, 전반적인 기계공학을 익히게 된다. 연수후에는 학생들의 어학능력이 현저히 향상되고 있음을 확인할 수 있으며, 졸업 후에는 거의 전원이 산업체 취업을 하고 있어 취업률 향상과 취업의 질적 향상에 큰 도움이 되고 있음을 알 수 있다.