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초등학생 인공지능윤리교육을 위한 STEAM 프로그램 개발
김지언,이철현 한국인공지능교육학회 2021 인공지능연구 논문지 Vol.2 No.1
인공지능 기술은 다양한 분야에서 무한한 편의를 제공하고 있지만, 한편으로 사회에 새로운 갈등을 일으키면서 윤리적 가치를 고민 하게 만들고 있다. 이에 정부와 기업에서는 발 빠르게 인공지능에 대한 윤리적 감성을 가진 인력을 키우기 위해 노력하고 있지만, 실제 교육 현장에서 적용 가능한 인공지능윤리교육 프로그램이나 교수학습자료는 매우 부족한 실정이다. 따라서 본 연구에서는 인 공지능윤리교육을 위한 STEAM 프로그램 개발을 목적으로, 국내외 인공지능윤리 이슈를 분석하여 윤리 항목과 교육 방향을 설정한 후 이를 교육 현장에 효과적으로 적용하기 위하여 STEAM 학습 준거틀을 적용하였다. 학생들은 ‘윤리적인 인공지능 개발자’이면서 동시에 ‘현명한 인공지능 사용자’를 목적으로, 본 프로그램을 통해 인공지능윤리의 핵심 항목인 공정성, 투명성, 책임성에 대해 이해 할 수 있도록 구성하였으며, 교사들이 학교 현장에서 활용 가능한 교수학습과정안과 활동지를 함께 제시하였다. Artificial intelligence technology provides infinite convenience in various fields, but on the other hand, it is creating new conflicts in society and making people think about ethical values. As a result, the government and companies are rapidly trying to develop a workforce with ethical sensitivity to artificial intelligence, but there is a lack of artificial intelligence ethics education programs or teaching materials that can be applied at the actual educational sites. Therefore, for the purpose of developing a STEAM program for artificial intelligence ethics education, domestic and foreign artificial intelligence ethics issues were analyzed, and ethics items and educational directions were set. And then, to effectively utilize this in the educational sites, the STEAM learning-frame was applied. Through this program, students are able to understand fairness, transparency, and responsibility, which are key items of artificial intelligence ethics, aimed at being "an ethical artificial intelligence developer" and "a wise artificial intelligence user." and teachers can be provided with teaching courses and workbook available at the educational sites.
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클라우드 기반 3D 프린팅 활용 생산 시스템 통합 연구
김지언,David Espaline,Eric MacDonald,Ryan B. Wicker,김다혜,성지현,이재욱 한국기계가공학회 2015 한국기계가공학회지 Vol.14 No.3
After the US government declared 3D printing technology a next-generation manufacturing technology, there have been many practical studies conducted to expand 3D printing technology to manufacturing technologies, called AMERICA MAKES. In particular, the Keck Center, located at the University of Texas at El Paso, has studied techniques for easily combing the 3D stacking process with space mobility and expanded these techniques to simultaneous staking techniques for multiple materials. Additionally, it developed convergence manufacturing techniques, such as direct inking techniques, in order to produce a module structure that combines electronic circuits and components, such as CUBESET. However, in these studies, it is impossible to develop a unified system using traditional independent through simple sequencing connections. This is because there are many problems in the integration between the stacking modeling of 3D printers and post-machining, such as thermal deformations, the precision accuracy of 3D printers, and independently driven coordinate problems among process systems. Therefore, in this paper, the integration method is suggested, which combines these 3D printers and subsequent machining process systems through an Internet-based cloud. Additionally, the sequential integrated system of a 3D printer, an NC milling machine, machine vision, and direct inking are realized.
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백팩타입 레이저 클리닝 장비를 활용한 강재 표면의 레이저 클리닝 시 공정변수별 클리닝 특성 비교
김지언,송무근,현정훈,이종명,김종도 대한용접·접합학회 2021 대한용접학회 특별강연 및 학술발표대회 개요집 Vol.2021 No.5
펄스 파이버 레이저 클리닝 장비의 평균 출력이 200W 이하일 경우 공랭식으로 별도의 냉각장치 없이 발진기를 소형으로 제작할 수 있다. 또한 백팩타입 형식으로 작업자가 휴대할 수 있는 무게와 사이즈로 제작된 클리닝 장비들도 현재 개발 중에 있다. 이와 같은 휴대용 레이저 클리닝 장비를 사용할 경우 대형 장비의 접근이 어려운 협소 구역의 작업이 용이한 이점이 있다. 본 연구에서는 백팩타입 레이저 클리닝 장비를 활용하여 강재 표면의 코팅층 제거를 위한 실험을 진행하였으며, 공정변수에 따른 레이저 클리닝 특성을 분석하였다. 레이저 클리닝된 시험편의 표면은 3D 현미경, SEM을 활용하여 확대 관찰하였으며, XRD 성분분석을 통하여 코팅층의 제거 유무를 확인하였다. 그 결과, 공정변수 제어를 통하여 저출력의 레이저 클리닝 장비를 활용한 우수한 클리닝 결과를 도출할 수 있었다.
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김지언,이민철 제어로봇시스템학회 2008 제어로봇시스템학회 국내학술대회 논문집 Vol.2008 No.10
This paper studies a method to cluster randomly moving factors and to control the position of them. This study is motivated by the figure of shepherding sheep in prairie and thus this paper proposes a cluster position control method, Boundary Push Method. the proposed method controls cluster by driving around boundary and pushing factors inward such as shepherding figure. This study can be applied such as to operating algorithm for public service robot servign crowd or error control method for multi agent mobile robots system. Most of cluster control theory for dynamic factors is based on anisotropy regulation like as following other factors, but in this proposed method, system demands no dynamic regulation of factors only except repulsion to control the cluster. In this paper, there is description of proposed Boundary Push method and simulation of the algorithm to evaluate results.
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Dynamic Modeling of Coupled Tendon-Driven System for Surgical Robot Instrument
김지언,이민철,Ryan Blaine Wicker,윤성민 한국정밀공학회 2014 International Journal of Precision Engineering and Vol.15 No.10
This paper is the study of a surgical instrument which directly performs MIS(Minimally Invasive surgery) on a patient, instead of asurgeon. The instrument used in robot assisted laparoscopy adopts a tendon driven mechanism so that it generates hand-like surgicalmotion through aperture of trocar. To create a high DOF of motion in restricted spaces, cable systems for end-effector have beenorganized by serial kinematic chains which can cause interference among joints sharing same axis. Also, to prevent the elongationof any cable, composited and pre-extended cables, which show nonlinear characteristics, are used in surgical instrument tendonsystem. As aforementioned difficulty and complexity, there are not many studies about measuring or estimating the operating forceof instruments without sensors, which is needed for safety but still impossible in commercial systems. This paper derives governinga dynamic model of a coupled cable pulley structure while considering the material tensile characteristics of the cables. The derivedmodel can estimate the operating force on end-effector as well as states of all inner pulleys without encoders. This paper proves theavailability of proposed methodology with comparison of numerical analysis and the experimental test of 2 DOF serial kinematicchained cable pulley link apparatus.
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