http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 서창희 (검색결과 315 건)
- 무료
- 기관 내 무료
- 유료
-
-
Effect of welding heat input on fatigue life of quenched boron steel and FB steel lap joint
서창희,이락규,오상균,정윤철,Je-Young Son,김영석 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.7
The effect of welding heat input on the fatigue life of a quenched boron steel and ferrite-bainite (FB) steel lap joint was investigated. Boron steel was quenched and welded with FB steel in heat input ranging from 0.29 to 0.67 kJ/mm. Boron, which can increase hardenability,affected the microstructure and hardness of the weld metal and heat affected zone (HAZ). The hardness of the weld metal and HAZ increased with decreasing welding heat input, and the high hardness of the weld metal and boron steel HAZ prevented the initiation of cracks in the stress concentration area around the bead. The bead width increased with increasing heat input, and the results of finite element method (FEM) showed that the maximum stress in the notch of the weld joint decreased when the bead width was increased. That is to say, the fatigue life increased when the weld joint had wider bead width. Finally, while the fatigue life was affected by the residual stress, the variation of the welding heat input used in this study had hardly any affect on the residual stress distribution.
-
시니어 크리에이터를 위한 모바일 앱의 UI 디자인 - 동영상 저작도구 앱을 중심으로 -
서창희,유영조,권지은 한국감성과학회 2022 추계학술대회 Vol.2022 No.0
최근 팬데믹 현상과 4차 산업 혁명으로 인해 빠르게 비대면 사회로 전환되며 디지털 활용능력의 중요성이 증가한다. 이러한 변화된 사회에서 영상매체가 하나의 소통창구로 자리잡고 사람들의 심리적 연결고리의 역할을 함에 따라 대중성이 증대되고 관련 활동이 확산되는 추세이다. 하지만, 그에 따른 연령별 앱 활용 능력 차이라는 문제가 도출되며 특히 연령대가 높은 시니어 계층이 보편적으로 낮은 디지털 리터러시 역량 수준을 보인다. 즉, 시니어는 생활 속에서 앱을 사용하는 것에 불편함을 느끼며 활용성에 제약을 받는다. 따라서, 본 연구의 목적은 시니어 크리에이터를 위한 동영상 저작도구 모바일 앱의 UI 디자인을 구축하는 것이다. 첫째, 시니어를 위한 앱에서 시니어만의 고유한 특성을 기반으로한 UI 특징을 도출한다. 둘째, 일반 동영상 저작도구 앱을 통해 최신 UI 트렌드를 파악한다. 마지막으로, 결과를 종합하여 시니어 맞춤형 동영상 저작도구 앱의 UI 디자인을 제시한다. 이를 통해 보다 많은 시니어들이 간편하고 손쉽게 영상활동을 하며 즐거움을 느껴 문화생활을 향유할 수 있기를 기대한다.
-
액티브 시니어의 디지털 리터러시 분석을 통한 동영상 콘텐츠 저작도구 개발 방향성 모색
서창희,권지은 한국감성과학회 2021 춘계학술대회 Vol.2021 No.-
Recently, an increasing number of active seniors are trying to overcome their old age identity through voluntary learning and activities, a combination of 'active' and 'senior'. Not only do they make good use of smartphones, but they are also increasingly challenging YouTube creators. However, there are limitations of using existing video authoring tools due to the characteristics of seniors. According to these problems, the purpose of this study is to explore the direction of development by analyzing the digital literacy capabilities of active seniors to find their characteristics and considering how they can use video contents authoring tools more conveniently and efficiently.
-
An Empirical Study on Dimension Reduction
서창희,이학배 한국자료분석학회 2018 Journal of the Korean Data Analysis Society Vol.20 No.6
The two inverse regression estimation methods, SIR and SAVE to estimate the central space are computationally easy and are widely used. However, SIR and SAVE may have poor performance in finite samples and need strong assumptions (linearity and/or constant covariance conditions) on predictors. The two non-parametric estimation methods, MAVE and dMAVE have much better performance for finite samples than SIR and SAVE. MAVE and dMAVE need no strong requirements on predictors or on the response variable. MAVE is focused on estimating the central mean subspace, but dMAVE is to estimate the central space. This paper explores and compares four methods to explain the dimension reduction. Each algorithm of these four methods is reviewed. Empirical study for simulated data shows that MAVE and dMAVE has relatively better performance than SIR and SAVE, regardless of not only different models but also different distributional assumptions of predictors. However, real data example with the binary response demonstrates that SAVE is better than other methods.
-
서창희,추병주,김정현,권지은 차세대컨버전스정보서비스학회 2022 차세대컨버전스정보서비스기술논문지 Vol.11 No.3
Recently, as social distancing due to the pandemic continues, face-to-face services are being reduced and non-face-to-face services based on digital platforms or smartphone applications are expanding. In the social work sector where face-to-face methods have traditionally been dominated, the need for a platform for providing non-face-to-face services is increasing. This paper aims to analyze the non-face-to-face platforms operated in the social work services sector to understand the current status and suggest directions for the development of easy and convenient non-face-to-face platforms centered on service users. For this, first, through literature research, the definition, function, and role of social work services and operating systems are identified. Second, six domestic non-face-to-face platform cases are analyzed and compared. Finally, based on the analysis results, the implications necessary for the development of a non-face-to-face social work platform that can be used conveniently and comfortably by all users are derived. Therefore, the direction of developing a non-face-to-face social work platform based on the research results will contribute to the effective use of social work services by more and more people. 최근 팬데믹으로 인한 사회적 거리 두기가 지속되면서 대면 서비스는 축소되고 디지털 플랫폼 또는 스마트폰 애플리케이션을 기반으로 한 비대면 서비스는 확대 중이다. 전통적으로 대면 방식이 주를 이루었던 복지 분야에서도 비대면 서비스 제공을 위한 플랫폼의 필요성이 증가하고 있다. 본 논문은 복지 영역에서 운영되고 있는 비대면 플랫폼을 분석하여 현황을 파악하고 복지서비스 사용자 중심의 쉽고 편리한 비대면 플랫폼 개발을 위한 방향성을 제안하고자 한다. 이를 위해 첫째, 문헌 조사를 통해 복지서비스와 운영체계에 대한 정의, 기능과 역할에 대해 파악한다. 둘째, 6가지 국내 비대면 플랫폼 사례를 조사하여 비교 분석한다. 마지막으로, 분석 결과를 바탕으로 모든 사람이 편리하고 간편하게 활용할 수 있는 비대면 복지 플랫폼 개발에 필요한 시사점을 도출한다. 연구 결과에 기반한 비대면 복지 플랫폼 개발 방향성은 복지서비스가 필요한 더 많은 사람이 효과적으로 복지서비스를 이용하는 데에 이바지할 것이다.
-
-
-
-
Effects of thickness and surface roughness on mechanical properties of aluminum sheets
서창희,정윤철,김영석 대한기계학회 2010 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.24 No.10
The effect of thickness on the mechanical properties of Al 6K21-T4 sheet specimens under uniaxial tension was investigated. In order to reduce the thickness of the specimens without changing the microstructure and grain size, chemical etching was carried out, resulting in Al sheets ranging from 0.40 mm to 1.58 mm in thickness. Additionally, the effect of surface roughness was determined by finite element (FE) calculations performed using FE code MARC 2007. Tensile specimens of varying surface roughness were modeled and simulated. An analysis of the combined effects of the thickness and surface roughness revealed that the yield and tensile strengths decreased when the number of grains over the thickness was decreased. The ductility also decreased when reducing the thickness. An FE simulation showed that both the surface roughness and thickness affected the flow-curve shape. Moreover, the effect of the surface roughness tended to increase when decreasing the sheet thickness of specimens having the same roughness.
KCI연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
