• 공학교육연구
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• 제16권5호
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• pp.18-23
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• 2013

A curriculum is a measure of how high level of knowledge is educated to students affiliated to university institutions, and is used as an indicator evaluating usefulness of the university institutions. For this reason, Designing and assessing curricula is a critical to high education institutions. However, in the case of development and quality assessment of a curriculum with a traditional way, finding a right curriculum which a designer intends is a time consuming and error-prone process. Therefore, in order to improve these problems, we propose the curriculum design engine using SES (System Entity Structure) / DEVS (Discrete Event System Specification) Framework in this paper. The SES describes all possible combination of curricula for students. The DEVS framework provides a simulation environment for models created from the SES by the students. The proposed engine will show appropriate curricula for students after a simulator appropriately filters students' requirement, according to conditions.

• 대한의용생체공학회:의공학회지
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• 제41권1호
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• pp.28-34
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• 2020

In this paper, we introduce motion artifact reduction algorithm for interleaved MRI using an advanced 3D approximation algorithm. The motion artifact framework of this paper is data corrected by post-processing with a new 3-D approximation algorithm which uses data structure for each voxel. In this study, we simulate and evaluate our algorithm using Shepp-Logan phantom and T1-MRI template for both scattered dataset and uniform dataset. We generated motion artifact using random generated motion parameters for the interleaved MRI. In simulation, we use image coregistration by SPM12 (https://www.fil.ion.ucl.ac.uk/spm/) to estimate the motion parameters. The motion artifact correction is done with using full dataset with estimated motion parameters, as well as use only one half of the full data which is the case when the half volume is corrupted by severe movement. We evaluate using numerical metrics and visualize error images.

• 한국안전학회지
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• 제17권4호
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• pp.140-145
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• 2002

The Flash Point is one of the most important combustible properties used to determine the potential for fire and explosion hazards of chemical materials. An accurate knowledge of the flash point is important in developing appropriate preventive and control measures in industrial fire protection. The lower flash points for the Water + n-Propanol systems were measured by using Pensky-Martens closed cup tester. The experimental data were compared with the values calculated by the laws of Raoult and van laar equation. The calculated values based on the van Laar equation were found to be better than those based on the Raoult's law.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2006년도 추계학술발표대회
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• pp.203-206
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• 2006

본 논문에서는 그레이레벨 영상을 보다 적은 비트율로 압축하기 위한 효율적인 방법을 소개한다. 제안한 기법의 핵심은 서로 인접한 픽셀을 표현하는 그레이레벨의 쌍에 대한 발생 빈도를 토대로 원래 영상의 그레이레벨 값을 이에 대응하는 등급 값으로 변환시키는데 있다. 등급 값으로 변환된 영상을 데이터의 통계적인 특성이 강화되기 때문에 적은 비트율로 부호화를 할 수 있어 압축 성능을 더욱 향상시킬 수 있다. 비트 깊이가 8인 즉, 8비트의 그레이레벨 영상을 본 논문에서 제안한 기법을 통하여 변환시킨 영상을 기존의 LZW 부호화 및 산술 부호화에 적용시킨 결과, 기존의 부호화 방법보다 향상된 압축 효율을 가져 왔다.

• 반도체디스플레이기술학회지
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• 제20권2호
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• pp.73-76
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• 2021

This thesis described the optical and electrical properties of the alternating current powder electroluminescent device based on Ag nanowire as a transparent electrode. The Ag nanowire electrode showed the morphology of 20 nm in diameter and 15 ㎛ in length. The transparent electroluminescent devices that were fabricated using the nanomilled ZnS : Cu, Mn phosphor by bar-coating process showed the transmittance of 67%. In order to improve the luminous efficiency, it is necessary to apply the transparent dielectric layer and increase the amount of the nanophosphor while maintaining the transmittance.

• Journal of information and communication convergence engineering
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• 제18권4호
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• pp.239-244
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• 2020

This study analyzed the influencing factors of learning engagement and teaching presence in online programming practice classes. The subjects of this study were students enrolled in an industrial specialized high school, who practiced creating Arduino circuits and programming using a web-based virtual practice tool called Tinkercad. This research adopted a tool that can measure task value, learning flow, learning engagement, and teaching presence. Based on this analysis, learning flow had a mediating effect between task value and online learning engagement, as well as between task value and teaching presence. Increasing learning engagement in online classes requires sensitizing the learners about task value, using hands-on platforms available online, and expanding interaction with instructors to increase learning flow of students. Furthermore, using virtual hands-on tools in online programming classes is relevant in increasing learning engagement. Future research tasks include: confirming the effectiveness of online learning engagement and teaching presence through pre- and post-tests, and conducting research on various practical subjects.

• 반도체디스플레이기술학회지
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• 제20권4호
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• pp.78-82
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• 2021

The Ga₂O₃ single crystal was grown through a floating zone method, and its structural and optical properties were instigated. It has a monoclinic crystal structure with a (100) crystal orientation and an optical band gap energy of 4.6 eV. It showed an average transmittance of 70% in the visible region. At room temperature, its photoluminescent spectrum showed three different peaks: the ultraviolet at 360 nm, the blue-green at 500 nm, and the red peaks at 700 nm. Especially, at liquid nitrogen temperature, the ultraviolet peak was optically active while the others were quenched.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2020년도 춘계학술발표대회
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• pp.47-48
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• 2020

네트워크 기능 가상화와 소프트웨어 정의 네트워킹의 융합은 현재의 네트워크를 대체할 새로운 매커니즘으로써 대두되고 있다. 특히 서비스 기능 체인은 네트워크에 유연성을 효율적으로 부여할 수 있다는 장점으로 인해 부각되고 있다. 그러나 서비스 기능 체인은 그 특유의 체인형 구조로 인해 생존성에 큰 약점을 갖고 있기도 하다. 이에 기존 방법들은 별도의 백업 가상 네트워크 기능을 배치하는데, 이는 자원 효율적이지 못하다. 본 논문에서는 추가적인 백업 가상 네트워크 기능 배치 없이 서비스 기능 체인의 생존성을 보장하는 백업 시스템을 제안한다.

• 공학교육연구
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• 제16권6호
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• pp.45-51
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• 2013

본 연구의 목적은 현업적용도 평가를 실시하여 교육과정, 교육방법, 교육환경 등의 교육시스템 개선 방안을 도출하는 것이다. 이를 위해 현업적용도 개념과 이론을 탐색하였다. 연구방법으로는 노혜란, 박선희(2011)가 개발한 현업적용도 연구도구를 활용하여 30명의 기계공학과 졸업생을 대상으로 설문 및 반구조화된 문항으로 인터뷰를 실시하였다. 현업적용도 설문결과 대학에서 배운 전공교과목이 업무와 관련 정도가 평균 4.27로 나타나 매우 높은 것으로 측정되었다. 뿐만 아니라 현업에 적용하는 기회도 평균 4.10으로 나타나 현업활용도가 높은 것으로 나타났다. 교육과정에 관한 설문결과는 현업에서 필요한 전공 및 교양과목이었다고 생각하느냐에 대한 문항에 평균 3.90의 결과가 나타났고, 현업적용을 높이는 실제적인 문제나, 사례, 경험 등이 활용되는 수업을 받았는지에 대한 문항에 평균 2.63으로 낮은 점수를 나타냈다. 인터뷰 결과 대학의 교육과정은 전공의 경우 현업에 대부분 직접적으로 활용되는 것으로 나타났다. 특히 전공동아리 활동, 팀프로젝트 등의 활동을 한 것이 현업에서 긍정적인 영향을 주는 것으로 나타나 지속적으로 강화해야 하는 것으로 조사되었다.

• 공학교육연구
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• 제25권5호
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• pp.33-43
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• 2022

This study started from a critical review of the current problem of ethics education in engineering colleges, how it has become stereotyped and perfunctory and hence, is failing to properly foster engineers with a sense of responsibility. Existing engineering ethics education occupies a very limited role and weight in the periphery of the engineering curriculum, unable to hold a central position. This situation is of grave concern, especially when the leadership of engineers with social and professional responsibility is of great importance. Therefore, this study explored new directions and strategies for engineering ethics education while reviewing domestic and foreign studies dealing with the current status and problems of engineering ethics education. First, this study discussed the need for and direction of shifting to ethical engineering education instead of ethics education centered on liberal arts courses. Second, this study presented specific practical strategies to construct the ethical engineering curriculum. For example, it is necessary to establish the ethical engineering curriculum with an education linking ethics with human development goals, ethics education using Korea's current issues and agendas, micro- and macro-level analysis related to engineering, and leadership education.