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RISS 인기검색어
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- 저자 : 황영(Hwang, Young) (검색결과 240 건)
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황영은(Youngeun Hwang),윤성호(Sungho Yoon) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
In this study, the absorption behaviours of carbon/epoxy composite were experimentally investigated through salt-water absorption tests and its theoretical investigation was also performed to compare the experimental results. In order to perform the absorption test of the composite under salt-water environments, the specimens were subjected to temperatures of 35, 55, and 75℃ for 730 days. According to the results of absorption tests, the curves of moisture content represented linear Fickian behaviour and its moisture diffusion coefficient increased at higher exposure temperature. The curves of moisture content derived from theoretical equation followed the experimental results. Using the activation energy and diffusion constant calculated from Arrhenius equation, the curve of moisture content at room temperature was derived and its exposure time to reach equilibrium was then determined.
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황영아 ( Young Ah Hwang ) 한국안전학회(구 한국산업안전학회) 2017 한국안전학회지 Vol.32 No.1
This study is aimed to design for qualification structure and develop the subjects for examination of the school safety manager qualifications. For the study purpose, job analysis and meetings with experts were performed for extract contents such as task range, criteria of examination, subjects of examination and examination methods, etc. The first step, duties and tasks of the school safety manager were figured out through revised job analysis data of the school safety manager developed before. On the second step, job model was established and developed job specification including importance, difficulty and frequency of each task. On the third step, task specification was developed, and Knowledge-Skill Matrix was the most important thing on examination were completed. The fourth step was the selection of examination subject using task-subject matrix and 6 subjects such as The Principles of Safety, Understanding of the School Safety Manual, Law Related on the School Safety, Introduction to Education, Understanding and Dealing with Type of the School Safety, Establishment of the School Safety Plan were derived from previous procedure. The fifth step was development of guidelines for design examination of each subject. The last step was development for skills education program.
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황영인(Young-In Hwang),이효성(Hyosung Lee),김용탁(Yongtak Kim),장재원(Jaewon Jang),김용일(Yong-Il Kim),김기복(Ki-Bok Kim) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
Non-destructive stress measurement techniques using ultrasonic methods are based on the calculation of an acoustoelastic modulus obtainable from the relationship between material stress and sound wave velocity. LCR (Critically Refracted Longitudinal) wave is most suitable for ultrasonic stress measurement because the change in ultrasonic travel time is relatively large with respect to differences in internal stress. In general, in order to calculate the acoustoelastic coefficient, it is necessary to measure the speed difference of ultrasonic waves according to the applied stress by performing tensile or compression tests with specimens extracted from an object. Accordingly, in this study, the acoustoelastic coefficient for the railway rail was calculated by analyzing the result of applying loads to the rail specimen. For this, ultrasonic transducers for stress measurement using LCR waves were designed and manufactured. Therefore, the validity of the residual stress measurement of the rail was verified using the acoustoelastic coefficient of the extracted specimen, and the reliability of the measurement results was confirmed by various methods.
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탄소섬유/에폭시 복합재의 기계적 특성에 미치는 염수환경의 열습 영향
황영은(Young Eun Hwang),윤성호(Sung Ho Yoon) 대한기계학회 2012 大韓機械學會論文集A Vol.36 No.10
본 연구에서는 최대 12개월 동안 염수침수시험을 수행하여 염수환경의 열습조건이 복합재의 특성에 미치는 영향을 조사하였다. 복합재 시편은 직물 형태의 탄소섬유와 에폭시로 구성된 프리프레그를 적층하여 제작하였으며, 노출온도 35℃, 55℃, 75℃가 적용된 염수환경에 완전 침수시키는 조건을 적용하였다. 연구결과에 따르면 복합재의 인장강성과 인장강도는 노출온도와 노출시간이 증가할수록 노출 전에 비해 감소 정도가 크지 않았지만 이에 비해 압축강성과 압축강도는 감소 정도가 크게 나타났다. 특히 압축강도는 노출온도가 증가할수록 염수침투가 가속화되어 감소 정도가 크게 나타났다. In this study, salt-water immersion tests were experimentally performed for up to 12 months to investigate the hygrothermal effect of salt-water environments on the mechanical properties of carbon/epoxy composites. The composites were manufactured by laminating prepregs composed of carbon plain-woven fabric and epoxy resin. The specimens were subjected to temperatures of 35, 55, and 75℃ while being exposed to the salt-water environments. Mechanical test results showed that the tensile modulus and tensile strength decreased at a small rate, and the compressive modulus and compressive strength decreased at a relatively larger rate, as the exposure temperature and time increased. The rate of decrease in compressive strength became larger as the exposure temperature became higher. This is because a higher environmental temperature accelerates the salt-water uptake; this, in turn, reduces the compressive strength more rapidly.
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수업분석을 통한 성인 대상 수업 개선 방안 모색 : H 대학 성인학습자 대상 학위과정을 중심으로
황영아(Hwang Youngah) 학습자중심교과교육학회 2021 학습자중심교과교육연구 Vol.21 No.4
본 연구는 성인학습자를 대상으로 하는 수업분석을 통해 성인학습자 대상 교실수업의 개선방안을 모색하고자 이루어졌다. 이에 성인교육의 원리 및 수업분석 이론에 근간하여 수업전략 및 교수자 항목으로 구분된 성인학습자 대상 수업분석 도구를 개발하고 대학 내 성인학습자 대상 학위과정으로 운영되는 5개 교과목의 수업분석을 실시하였다. 연구 결과 수업전략 측면에서는 참여형 수업운영과 후속 강의 안내가 부족한 측면이 있었으며, 학습목표제시나 선행학습 촉진, 정리제공 등도 외연적 수준에서 이루어지고 있는 것으로 나타났다. 교수자 측면에서는 움직임과 대화 장려 측면에서 미흡한 장면이 발견되었으며, 목소리, 호명, 질문활용 및 피드백 측면에서도 보완이 필요한 것으로 나타났다. 이에 수업 운영 개선방안으로 쌍방향 소통이 가능한 질의나 간략한 퀴즈 등의 활용을 통한 학습자 이해수준 확인, 학습자의 능동적 참여가 가능한 교수학습활동 설계, 학습자 경험에 근간한 사례 활용, 동영상이나 시범 등 시청각적 경험 제공, 학습자 간 통일된 적정 호칭 사용, 질의 시 충분한 기회(시간) 제공, 응답에 따른 긍정적 피드백 제공, 다수 학생 간 상호작용을 위한 개방형 질문 활용 등이 개선방안으로 도출되었다. The purpose of this study was to explore teaching method to improve classroom instruction for adult learners through classroom analysis. Accordingly, based on the principles of adult education and the theory of class analysis, a classroom analysis tool for adult learners divided into class strategies and instructor items was developed. And classroom analysis of five subjects on the degree program for adult learners on university was conducted. The results of this study were follows. First, in terms of instructional strategies, the lack of participatory class operation and follow-up class guidance was found. And the presentation of learning goals, promotion of prior learning, and provision of arrangements were conducted at an external level. Second, in terms of instructors, insufficient parts were found on movement and encouraging communication, and it was found that supplementation was also needed in terms of voice, calling, questioning and feedback. Therefore, as a ways to improve classroom instruction, checking the understanding of learners through the use of questions or brief quizzes that enable interactive communication, design teaching and learning activities that enable active participation of learners, using actual cases based on learner experiences, and providing audiovisual experiences such as videos and demonstrations, the use of unified appropriate titles among learners, sufficient opportunities(times) for inquiries, positive feedback according to responses, and the use of open questions for interaction among multiple students were drawn as improvement measures.
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황영아 ( Young A Hwang ) 한국성경적상담학회 2014 성경과 상담 Vol.13 No.-
노인 자살율은 1997년에 1,174에서 2003년 한 해 동안은 65세 이상 노인 2,760명이 스스로 목숨을 끊었고 2004년에는 61세 이상 노인 자살자가 4,220명으로 나타났다. 통계청에<sup>*</sup> 따르면“2008년에는 4,364명, 2009년에는 5,051명으로 증가하였으며 65세 이상 우리나라 노인자살률은 국제사회에서 자살이 많은 것으로 알려진 일본보다 두 배 이상 높았고 노인자살자수는 전체 자살자 수의 32.8%를 차지하는 심각성을 나타내 보이고 있다.”<sup>**</sup> 이처럼 증가하고 있는 노인자살 문제는 더 이상 방치해서는 안 될 사회문제로 대두되고 있다. 노인자살 문제는 개인적인 생명을 훼손하는 것과 개인의 삶이 질의 문제에도 영향이 있겠지만 이러한 자살의 증가는 그 가족과 공동체의 파괴를 가져오며 더 나아가 사회의 통합을 헤치게 된다. 이처럼 증가하는 노인자살에 대하여 개인과 우리사회, 국가적인 차원에서의 다각적인 노력과 대책이 절실히 요청되고 있다. 우리사회에서 증가하고 있는 노인자살문제 대한 다양한 연구가 더 확장되고 전개되어서 여러 가지 대책과 방안들이 노인자살예방에 적용되어져야 할 것이다. The remarkable development of modern science and technology has brought about the advancement of medical technology and medicine, preventing human illnesses and prolonging the average lifespan. In South Korea, one in ten people are over the age of 65. Especially after 2010, the reason behind the rapid growth of the elderly population is that around the world, baby boomers entered old age. According to the National Statistical Office, which announced the `Aged population statistics of 2007` in celebration of Senior Citizens Day, the elderly population outlook is such that in 2016 the elderly population will supersede the under-14-years-old juvenile population. In 2026 South Korea will see an increase in its elderly population with two in ten people being elderly, resulting in the elderly population reaching 20.8%, becoming a super aging society. South Korea is experiencing unparalleled speedy aging, which is difficult to find in any other country around the world. The various elderly problems generated by an increasing elderly population is no longer a personal or family matter but acknowledged as a societal and national matter. The author counseled elderly people who were more susceptible to suicide, narrowed down based upon thoughts of suicide and suicidal tendency tests, in order to analyze the actual reasons they had behind suicidal thoughts.
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