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서창희,Seo, Chang-HuI 대한양돈협회 1995 養豚 Vol.17 No.10
돼지를 기생충으로 부터 보호하기 위하여 격리사육시켰다 하더라도 기생충은 돈사내에 존재할 가능성이 높고, 파리나 쥐와 같은 동물에 의해서 전파 될 수 있으며, 돼지에게 설사증과 기침과 같은 증상을 유발시킬 수 있다. 거의 모든 기생충이 분변을 통해서 충란을 배출하지만, 종에 따라서는 다른 경로를 통해서 충란을 배출해 낸다. 구충제에는 광범위 구충제와 어느 특이종에만 작용하는 구충제 두가지가 있으며, 이 두가지 약뭄ㄹ 모두 성충과 미성숙충을 없애거나 예방하는데 사용될 수 있다.
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.
서창희,곽소정,권지은 차세대컨버전스정보서비스학회 2023 차세대컨버전스정보서비스기술논문지 Vol.12 No.2
With the recent advent of the digital era based on the mobile service, smartphone use is becoming popular. Therefore, various activities related to video media are derived and commercialized along with various applications. For this, this study analyzes the currently commercialized mobile video authoring tool applications and presents user-centered mobile video authoring tool UX design guidelines. First, we investigate the current status and concepts of video authoring tools corresponding to PC and mobile devices through various literature surveys. Second, we compare and analyze commercialized mobile video authoring tool applications from a UX design perspective. Third, we establish UX guidelines for effective application development for mobile video authoring tools. UX design guidelines can be broadly divided into ‘video production and editing process’ and ‘UI design’. The constructed content consists of only simple and essential core functions about video production and editing stage, and an intuitive and visible UI design that is easy to use by anyone with subdivided items such as layout, color, and typography. 최근 모바일을 기반으로 하는 서비스가 보편화된 디지털 시대가 도래하며 스마트폰 활용이 대중화되었다. 따라서, 각종 앱과 더불어 영상 매체와 관련한 폭넓은 활동이 함께 도출되고 상용화되는 추세이다. 이를 위해 본 연구는 현재 상용화되는 모바일 영상 저작도구 앱을 분석하여 사용자 중심의 모바일 영상 저작도구 UX 디자인 가이드라인을 제시하고자 한다. 첫째, 각종 문헌 조사를 통한 PC와 모바일에 해당하는 동영상 저작도구에 대한 현황과 개념을 조사한다. 둘째, 상용화되는 모바일 영상 저작도구 앱에 대해 UX 디자인 관점에서 비교 분석한다. 셋째, 모바일 영상 저작도구의 효과적인 애플리케이션 개발을 위한 UX 가이드라인을 정립한다. UX 디자인 가이드라인은 크게 ‘영상제작 및 편집 프로세스’와 ‘UI 디자인’ 측면으로 나누어 살펴볼 수 있다. 구축된 내용은 단순하고 필수적인 핵심 기능만으로 구성된 영상제작 및 편집 단계와 누구나 사용하기 편리하고 간편한 직관적이고 가시성 높은 UI 디자인을 레이아웃, 색채, 타이포그래피 등과 같이 세분화된 항목으로 구성된다.
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.
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.