http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김유영,안인섭,남태현,허보영,Kim, Yu-Yeong,An, In-Seop,Nam, Tae-Hyeon,Heo, Bo-Yeong 한국재료학회 1997 한국재료학회지 Vol.7 No.11
Mg-Zn-Ca합금의 잉곳트는 BN을 내벽에 바른 4x$10^{-5}$Torr의 진공의 석영관내에서 제조하였다. Mg-Zn합금계의 입자미세화를 위하여 0.5-5wt.%조성범위의 Ca를 첨가하였다. 제조된 합금을 용체화처리한 후 결정립크기와 경도를 측정하였다. Mg-6wt.%Zn합금의 입자미세화효과는 Ca가 1.5wt%첨가 될 때 최적의 조건이었다. Mg-6wt.% Zn과 Mg-6wt.% Zn-2wt.% Ca및 Mg-6wt.% Zn-1.5wt.% Si합금을 시효처리하여 시효거동을 조사하였다. 입자미세화에 의한 경도증가효과는 Mg-Zn-Ca합금계에서 크게 나타났으며 시효에 의한 경도증가효과는 Mg-Zn-Si합금계에서 크게 나타났다. Mg-6wt.%Zn합금의 부식전류밀도는 0.5wt.% Ca의 조성에서 감소되었다.
Mg-6Zn-2Cu 및 Mg-6Zn-1.5Si합금의 미세조직 및 석출거동
김유영,안인섭,남태현,Kim, Yu-Yeong,An, In-Seop,Nam, Tae-Hyeon 한국재료학회 1998 한국재료학회지 Vol.8 No.4
Mg-6Zn-2Cu 및 Mg-6Zn-1.5Si(wt%)합금의 미세조직 및 석출거동을 조사하였다. 합금은 $4 x 10^{-4}$ 의 진공분위기에서 제조하였고 용체화처리는 $435^{\circ}C$에서 8시간 행하였다. Mg-6Zn합금에 1.5wt.%Si를 첨가한 합금에서는 입계 및 입내에 $10\mu\textrm{m}$-2$\mu\textrm{m}$크기의 구형의 $MgZn_{2}$와 $Mg_{2}$Si상이 존재한다. 시효경화거동은 용체화처리된 Mg-6Zn-2Cu 및 Mg-6Zn-1.5Si합금에서 조사되었다. 결정립 미세화에 의한 경도증가효과는 Mg-6Zn-2Cu합금계에서 크게 나타났으나, 시효에 의한 경도증가효과는 Mg-Zn-Si합금계에서 크게 나타났다. 시효처리 후 생성된 석출상들은 투과전자현미경 분석결과 Mg-6Zn-2Cu합금에서는$ Mg_{2}$$Zn_{3}$이었고 Mg-6Zn-1.5Si 합금에서는 $Mg_{2}$$Zn_{11}$ /이었다.
딥러닝 기법을 이용한 공공기관 설문조사 주관식 문항 활용방안에 관한 연구
공준석(Joon Suk Kong),김유영(Yu Yeong Kim) 한국자료분석학회 2023 Journal of the Korean Data Analysis Society Vol.25 No.6
본 연구의 목적은 공공기관 설문조사에서 주관식 문항의 포함 여부가 만족도 조사 결과에 미치는 영향을 딥러닝 기법을 통해 분석하는 데 있다. 매년 약 1,000여 개의 공공기관이 만족도 조사를 시행하고 있으나, 비교가능성을 위해 보편화된 설문을 사용함에 따라 구체적 정보의 확인에 한계를 보이며, 이에 대한 대안으로 주관식 문항이 활용되고 있다. 그러나 주관식 문항에 대한 분석은 분절적으로 이루어져, 실질적으로 만족도 조사에 활용되지 못하고 있다. 이와 같은 문제를 해결하기 위해 K-공공기관 만족도 조사 결과 약 1,500명의 데이터를 통해 주관식 문항의 활용방안을 탐색했다. RoBERTa 알고리즘을 통해 주관식 문항을 Embedding하고, XGBoost, 인공신경망, 로지스틱 회귀분석 등의 알고리즘을 활용하여 만족도 예측 결과를 비교했다. 실험 결과, 알고리즘에 따른 성능 차이는 일반적으로 알려진 것과 같이 Table data에서는 XGBoost의 성능이 우수한 것으로 나타났다. 하지만 주관식 문항을 포함할 때는 결과가 상이할 수 있음을 확인하였다. 나아가 주관식 문항을 포함하여 만족도 점수를 예측할 때 정확도(accuracy)와 재현률(recall)에 긍정적인 영향을 미칠 수 있음을 확인하였다. 따라서 딥러닝 기반의 분석 방법을 통해 주관식 문항의 복잡성과 다양성을 더욱 정확하게 반영할 수 있으며, 이를 통해 만족도 조사의 효과성과 투명성을 높일 수 있다고 기대된다. The objective of this study is to assess the impact of incorporating subjective questions in public agency satisfaction surveys using deep learning techniques. Each year, around 1,000 public agencies carry out satisfaction surveys. Nevertheless, the reliance on standardized surveys for comparability restricts the gathering of nuanced information. In response, subjective questions have been introduced. Yet, the examination of these questions remains fragmented and hasn't been integrated into mainline satisfaction surveys. To address this gap, we evaluated feedback from roughly 1,500 participants associated with K-Public Agency. For handling these subjective questions, we leveraged the RoBERTa algorithm and employed a range of models, such as XGBoost, neural networks, and logistic regression. Preliminary findings underscore the effectiveness of XGBoost when dealing with structured data. Notably, its performance showed variations when considering subjective inputs. A significant finding was that integrating subjective questions enhanced both the accuracy and recall in predicting satisfaction levels. This indicates that deep learning offers a detailed interpretation of subjective inquiries, which elevates the overall quality of public satisfaction surveys.
이영란,배승열,권대환,안인섭,김유영,Lee, Yeong-Ran,Bae, Seung-Yeol,Gwon, Dae-Hwan,An, In-Seop,Kim, Yu-Yeong 한국재료학회 2001 한국재료학회지 Vol.11 No.10
In order to improve the grindability of magnetic abrasive, Fe-WC magnetic abrasives were made by a plasma melting method after ball milling at various times. This study aims to investigate homogeneously distributed hard phases in Fe matrix and strong bonding between the Fe-matrix and the hard phase. According to XRD, SEM and OM observation, Fe-WC magnetic abrasive powders exhibit the best grindability by plasma melting for 30h ball milling. As a result of magnetic abrasive polishing, the surface roughness, R_{max}$ 5.0$\mu\textrm{m}$, before magnetic abrasive polishing, was reduced to R_{max}$ 2.4$\mu\textrm{m}$. The new magnetic abrasive polishing process is thought to be the useful methods for the automation of three dimensional surface polishing.
분무 건조된 W-Co 복합염의 열분해 및 분말 특성에 관한 연구
권대환,안인섭,하국현,김병기,김유영,Gwon, Dae-Hwan,An, In-Seop,Ha, Guk-Hyeon,Kim, Byeong-Gi,Kim, Yu-Yeong 한국재료학회 2001 한국재료학회지 Vol.11 No.11
Homogeneous spherical W-Co salt powders were made by spray drying of aqueous solution of ammonium $metatungstate(NH_4)_6(H_2W_{12}O_{40}){\cdot}4H_2O,\; AMT)$ and cobalt nitrate $hexahydrate(Co(NO_3)_2{\cdot}6H_2O)$. The thermal decomposition process of spray dried W-Co salt powders was studied by TG, XRD, SEM, TEM and FT-IR. Spray dried W-Co salt powders were calcined for 1 hour in the temperature from$ 350^{\circ}C$ to $800^{\circ}C$ in atmosphere of air. At the temperatures over $600^{\circ}C$, spherical $CoWO_4/WO_3$ composite oxide powders were obtained. The primary particle size of W/Co composite oxide powders increased with increasing thermal decomposition temperature due to the particle growth. The observed crystallite size by TEM was in the range of 60nm and that of $CoWO_4$ calculated by Scherrer's formula at $800^{\circ}C$ was smaller than 55nm. The crystallite site was identified by XRD and TEM.
환자들의 의료시장개방에 대한 인식도와 외국병원 선택요인 - S대학교병원 외래환자들을 대상으로
윤여룡 ( Yun Yeo Lyong ),유승흠 ( Yu Seung Heum ),김유영 ( Kim Yu Yeong ),오현주 ( O Hyeon Ju ) 한국병원경영학회 2003 병원경영학회지 Vol.8 No.3
Korea is to open its medical markets to foreign hospitals starting in the year 2006 regardless of our will(DDA, Doha Development Agenda). To accurately understand the characteristics of Korean medical users, their detailed and various needs, their attitudes toward the opening of Korean medical markets, and factors affecting these users in choosing foreign medical service providers would be first step needs to be taken by the Korean medical facilities that need to survive and develope through the fiercely competitive era coming with the opening of Korean medical markets to foreign medical service providers and would be very important in hospital management. The subjects of this study were 500 patients randomly selected from the outpatients who visited one of university hospitals in Seoul on the 14th-16th days of April 2033, and conducted a self-completion questionnaire. The answers of 463 respondents among the selected patients(93% of a responding rate)were analyzed through the Excel and statistics programs. The attitudes on the opening of the me야cal markets were shown in agreement 56.5%(247 persons), disagreement 6.9%(30 persons), and no idea 36.6%(160 persons). In consideration of only the answers as agreement and disagreement exclusive of the answer as no idea, 89.2% of the respondents agreed to the opening of the medical markets while 10.8% objected to the opening. The approval rate was higher with the higher education and income levels. Moreover, The approval rate for the opening of the medical markets was relatively high regardless of the satisfaction in the medical service, and the most important reason of the agreement was the guarantee of the patients (national)option. The main reason of the disagreement was high medical fee(50.5%), and the other reasons showing low rates were outflow of the domestic fund to the foreign countries(13.6%), damage of medical influences on the public(11.4%), lack of competition of the domestic medical industry(9.l%)and so on. As for the factors of selecting the foreign hospitals in the opening of the medical markets, the patients considered the authority(competency)of doctors firstly, and the other principal factors were worldwide fame and reliance, specific explanation of doctors, modernized medical instruments, convenient consultation procedure, etc. The patients agreed to the opening of the me야cal markets at a high rate regardless of the satisfaction in the medical service, and the most principal reason of the agreement was the guarantee of the patients(national)option for the medical care. Connected with the factors to select the hospitals, the approval reasons for the opening of the medical markets were the authority(competency)of the doctors as the first one, and then fame and tradition, reliance, overall diagnosis and modernized medical instruments, doctors specific explanation, and so on. However, these factors are actually associated with the quality of the medical care, and consequently the approval reasons for the opening of the medical markets are connected with the security of the medical care. Accordingly, the guarantee of the patients(national)option answered as the main reason of the agreement can be also understood as the awareness of the right to have a variety of options for the security of the medical quality.