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명주현(JooHyun Myung),정민화(Minhwa Chung) 한국정보과학회 2000 한국정보과학회 학술발표논문집 Vol.27 No.1B
의사형태소를 디코딩 단위로 하는 한국어 연속 음성 인식에서는 조사, 어미, 접사 및 짧은 용언의 어간등의 단어가 상당수의 인식 오류를 발생시킨다. 이러한 단어들은 발화 지속시간이 매우 짧고 생략이 빈번하며 결합되는 다른 형태소의 형태에 따라서 매우 심한 발음상의 변이를 보인다. 본 논문에서는 이러한 단어들을 한국어 기능어라 정의하고 실제 의사 형태소 단위의 인식 실험을 통하여 기능어 집합1, 2를 규정하였다. 그리고 한국어 기능어에 기능어용 음소를 독립적으로 적용하는 방법을 제안했다. 또한 기능어용 음소가 분리되어 생기는 음향학적 변이들을 처리하기 위해 Gaussian Mixture 수를 증가시켜 보다 견고한 학습을 수행했고, 기능어들의 음향 모델 스코어가 높아짐에 따른 인식에서의 삽입 오류 증가를 낮추기 위해 언어 모델에 fixed penalty를 부여하였다. 기능어 집합1에 대한 음소 모델을 적용한 경우 전체 문장 인식률은 0.8% 향상되었고 기능어 집합2에 대한 기능어 음소 모델을 적용하였을 때 전체 문장 인식률은 1.4% 증가하였다. 위의 실험 결과를 통하여 한국어 기능어에 대해 새로운 음소를 적용하여 독립적으로 학습하여 인식을 수행하는 것이 효과적임을 확인하였다.
김종건(Jonggun Kim),정주현(Joohyun Chung) 한국디지털콘텐츠학회 2019 한국디지털콘텐츠학회논문지 Vol.20 No.9
Subways are operated with the aim of eliminating traffic problems in large cities, and the number of subway users is increasing with economic growth, and it plays a big role in public transportation. However, due to structural weaknesses, many people are injured and property damage in the event of a disaster. In the case of a subway fire, it is easy to lead to a large-scale accident such as a Daegu subway fire disaster due to the speciality of underground space. Therefore, this study examined the problems of fire response equipment and passenger relief equipment box through the inquiry of the evacuation behavior and disaster psychology in the event of a subway fire, and suggested the design direction and the new ceiling embedded structure accordingly by deriving the risk factors. First, it is installed in a modular space above the ceiling of the platform to induce rapid evacuation; second, it is improved to induce evacuation to the exit by LED guide lamp. Third, it integrates with sprinkler, which is an automation facility, to help initial suppression in case of fire.
Hyeyoung K Park,Joohyun Chung,Jiyeon Ha 한국간호과학회 2021 한국간호과학회 학술대회 Vol.2021 No.10
Aim(s): Despite the various benefits of information and communication technology (ICT), such as convenience and efficiency, many older adults have trouble accepting new technologies. It is necessary to identify the reasons for low ICT use among older people despite their positive attitudes toward ICT to help older adults cope with social changes and bridge the digital divide. This study explored technology acceptance and related factors among older adults who live in rural areas by proposing a new conceptual framework for the level of technology acceptance based on the existing model (Senior Technology Acceptance Model, STAM) and tested the new framework using pathway analysis. Method(s): A semi-structured open-ended interview was conducted among three focus groups (n=15) and a survey questionnaire were collected from older Korean adults living in the rural area (n=233). Qualitative data were analyzed using directed content analysis, and quantitative data were analyzed using pathway analysis. Result(s): Four themes, 11 subthemes, and 18 codes were identified, and new conceptual framework was proposed based on the qualitative findings. The results of the model revealed significant positive direct paths from external controls (β=0.44, p<0.01), attitudinal belief (β=0.34, p<0.01), and cognitive health (β=0.10, p=0.03) to the internal abilities. Conclusion(s): It is necessary to develop and apply a targeted and tailored ICT education program to improve self-efficacy and reduce anxiety in using technology for older adults living in rural areas.
백혜주 ( Hye-joo Back ),정주현 ( Joohyun Chung ) 한국디자인트렌드학회 2014 한국디자인포럼 Vol.43 No.-
Designers consider cultures in design process, because customer`s design taste is influenced by local cultures. Moreover, an expanding internalization can enhance the value of local culture as it reduces the fear of vanishing local identity. The goal of this study is to suggest a classification table of design modeling elements in cultural types. In the literature research, I studied cultural dimensions and modeling elements. Cultural dimensions are organized by five dimensions through each culture theory from Geerf Hofstede which includes PDI, IDV, MAS, UAI, LTO dimensions. Through each modeling theory from five experts, modeling elements are organized by three elements including material, color and form. Each element has opposite sides. With two fixed models I designed an experimental module. As a result, a classification table was produced from the compiled statistics, and `Culture dimensions - Modeling elements` table was completed. Main purpose of this study is to suggest a classification table of modeling elements in cultural types by integrating experts` opinions. This table presents a design methodology for designers.
Lee, Sungkyu,Kim, Min Jung,Park, Joohyun,Hwang, Sang Yeon,Chung, Seok-Woo,Lee, Seung-Jong,Yun, Yongseung Carl Hanser Verlag GMBHCo KG 2018 MATERIALPRUFUNG Vol.60 No.2
<P>A mechanistic exposure experiment was performed on welded samples of the commercially available Haynes (R) Hastelloy (R) C-4 (R) Ni-Cr-Mo-Fe alloy (65 wt.-% Ni, 16 wt.-% Cr, 16 wt.-% Mo, 3 wt.-% Fe, 2 wt.-% Co, 1 wt.-% Mn, 0.7 wt.-% Ti, 0.5 wt.-% Cu, 0.08 wt.-% Si and 0.01 wt.-% C) at coal gasification pilot plant facilities affiliated with the Institute for Advanced Engineering in Yongin-si, South Korea. The alloy samples were preoxidized at 400 degrees C under a stagnant air atmosphere for 24 h prior to exposure to the corrosive environment (60 % CO, 28.4 % H-2, 2.5 % CO2, 0.8 % CH4, 600 ppm H2S and 110 ppm carbonyl sulfide under 2.005 MPa pressure and 170 degrees C). Thermodynamic Ellingham-Pourbaix stability diagrams were constructed to provide insight into the mechanism of the observed corrosion behavior prevailing in the piping materials between the particulate removal unit and water scrubber of the coal gasification pilot plant. The thermodynamic inference of the corrosion mechanism was supplemented with morphological, compositional and microstructural analyses of the exposed samples using scanning electron microscopy, X-ray diffraction and energy dispersive X-ray spectroscopy analyses performed on the external and cross-sectional surfaces of the recovered corrosion test samples to comprehensively examine the corrosion scale. The X-ray diffraction results revealed stable corrosion products of NiO, MoNi4 and Cr4.6MoNi2.1 after a total accumulated exposure duration of 139 h to the corrosive atmosphere. Scanning electron microscopy and energy dispersive X-ray spectroscopy positively identified the formation of rather continuous and adherent preoxidation corrosion products in the alloy samples, although extensively peeled off oxides were eventually observed as corrosion scale on the post-exposure alloy samples, which were attributed to the combined effects of the evaporation of the hydrated Fe, Al and Cr chlorides and their subsequent transformation into thin (spalled) oxides.</P>