신경망을 이용한 언어장애인용 문장발생장치의 동사예측

이은실,민흥기,흥승홍,Lee Eunsil,Min Hongki,Hong Seunghong 한국융합신호처리학회 2000 융합신호처리학회 논문지 (JISPS) Vol.1 No.1

In this paper, we proposed a method which predict the verb by using the neural network in order to enhance communication rate in augmentative communication system for Korean language disorders. Each word is represented by an information vector according to syntax and semantics, and is positioned at the state space by being partitioned into various regions different from a dictionary-like lexicon. Conceptual similarity is realized through position in state space. When a symbol was pressed, we could find the word for the symbol at the position in the state space. In order to prevent verb prediction's redundancy according to input units, we predicted the verb after separating class using the neural network. In the result we can enhance $20\% communication rate in the restricted space

수열탄화 통합공정 발생 폐수의 안정적인 처리 및 재이용 자원화 기술

이은실(Eunsil Lee),김은주(Eunju Kim) 대한환경공학회 2022 대한환경공학회 학술발표논문집 Vol.2022 No.11

연구논문 : 전기방사를 이용한 리그닌 나노섬유의 제조

이은실 ( Eunsil Lee ),이승신 ( Seung Sin Lee ) 한국의류학회 2014 한국의류학회지 Vol.38 No.3

Lignin is an abundant natural polymer in the biosphere and second only to cellulose; however, it is underutilized and considered a waste. In this study, lignin was fabricated into nanofibers via electros pinning. The critical parameters that affected the electros pin ability and morphology of the resulting fibers were examined with the aim to utilize lignin as a resource for a new textile material. Poly(vinyl alcohol) (PVA) was added as a carrier polymer to facilitate the fiber formation of lignin, and the electros pun fibers were depositedon polyester (PET) nonwoven substrate. Eleven lignin/PVA hybrid solutions with a different lignin to PVA mass ratio were prepared and then electros pun to find an optimum concentration. Lignin nano-fibers were electros pun under a variety of conditions such as various feed rates, needle gauges, electric voltage, and tip-to-collector distances in order to find an optimum spinning condition. We found that the optimum concentration for electros pinning was a 5wt% PVA precursor solution upon the addition of lignin with the mass ratio of PVA: lignin=1:5.6. The viscosity of the lignin/PVA hybrid solution was determined as an important parameter that affected the electros pinning process; in addition, the interrelation between the viscosity of hybrid solution and the electros pin ability was examined. The solution viscosity increased with lignin loading, but exhibited a shear thinning behavior beyond a certain concentration that resulted in needle clogging. Asteep increase in viscosity was also noted when the electros pun system started to form fibers. Consequently, the viscosity range to produce bead-free lignin nanofibers was revealed. The energy dispersive X-ray analysis confirmed that lignin remained after being transformed into nanofibers. The results indicate the possibility of developing a new fiber material that utilizes biomass with resulting fibers that can be applied to various applications such as filtration to wound dressing.

토크 리플 저감을 위한 매트릭스 컨버터 구동 유도 전동기의 향상된 예측 제어 기법

이은실(Eunsil Lee),최우진(Woo Jin Choi),이교범(Kyo-Beum Lee) 제어로봇시스템학회 2015 제어·로봇·시스템학회 논문지 Vol.18 No.1

This paper presents an improved predictive control of an induction machine fed by a matrix converter using N-switching vectors as the control action during a complete sampling period of the controller. The conventional model predictive control scheme based matrix converter uses a single switching vector over the same period which introduces high torque ripple. The proposed switching scheme for a matrix converter based model predictive control of an induction machine drive selects the appropriate switching vectors for control of electromagnetic torque with small variations of the stator flux. The proposed method can reduce the ripple of the electrical variables by selecting the switching state as well as the method used in the space vector modulation techniques. Simulation results are presented to verify the effectiveness of the improved predictive control strategy for induction machine fed by a matrix converter.

PERFORMANCE OF LEED-CERTIFIED HOME : Resident Satisfaction, Health Impact, and Energy Efficiency

Eunsil Lee(이은실) 한국주거학회 2021 한국주거학회 학술대회논문집 Vol.33 No.1

온라인 교양영어 과목의 녹음과제와 성찰리포트에 나타난 자기주도 학습 사례 연구

이은실(Eunsil Lee) 학습자중심교과교육학회 2020 학습자중심교과교육연구 Vol.20 No.12

사이버대학 온라인 강의는 녹화로 진행된다는 점에서 비동시적이며 일 방향적인 교사중심 수업이 되기 쉽기 때문에, 참여도가 높고 상호작용이 활발한 과제 학습을 고안하는 것이 중요하다. 과제학습을 수행하는데 있어서 사이버대학의 학생들은 자기주도 학습 역량을 갖추는 것이 필요하다. 이 연구는 온라인 교육에서 자기주도 학습을 활성화 할 수 있는 과제 개발이 중요하다는 것에 대한 이해에서부터 시작한다. 연구 목적은 자기주도 학습을 온라인 과제에 실제로 활용하는 방법을 토의하는 데 있다. 이를 위해 K 사이버대학의 교양영어 과목인 “팝송으로 배우는 영어”를 2015년부터 3년간 사례로 연구하였으며, 조사방법은 다음과 같다. 먼저, 이 과목에서 시행한 팝송 암기 녹음 과제와 녹음과정에 대해 성찰한 리포트를 연구 자료로 수집하여 분석하였다. 3년 동안 469개의 음성파일과 463개의 문서파일을 수집하였다. 그리고 이 기간 동안 설문조사를 실시하여 통계 분석하였다. 설문 결과를 통해 녹음과제는 학생들이 선호하고 학습 참여에 도움이 되는 활동이라는 것을 알 수 있었다. 결국 녹음 과제가 자기주도 학습에 도움이 되는 활동이라고 결론지을 수 있다. 성찰리포트 분석 결과, 곡 선택 이유는 감정적이며 인지적이고 전략적이었다. 노래 암기를 위해 다양한 전략을 적극적으로 사용하는 것도 알게 되었다. 이와 같은 결과를 통해 온라인 강의에서 자기주도 학습이 가능하도록 과제를 고안하고 잘 활용하면 학습효과가 높아진다는 것을 알게 되었다. Online lectures at Cyber Universities are usually conducted with one-way interaction and teacher-centered instruction. To make learning more engaging and interactive, adult learners at Cyber Universities are required to prepared to be self-directed learners. The study begins from understanding the importance of creating and designing assignment that can activate self-directed learning especially in online education. The purpose of the study is to discuss ways of putting self-directed learning to work at online classrooms. A general selective class, “Pop Song English,” at K Cyber University is the case of the study for three years from 2015 to 2017. Students turned in the voice file of a self-recorded pop song and the word file of self-reflected report. This assignment were collected for 3 years with the volunteerly responses of the survey questionaries. Collected data of 469 voice files and 463 word files were analyzed qualitatively, and the survey responses were analyzed statistically. The result of survey research shows that recording was a preferred and participatory activity. In addition, the many survey respondents think it is a self-directed assignment. The students who turned in the assignment appealed in their reflection report that they chose the song because it seemed easy to memorize, easy to sing, and easy to understand. Also they selected the songs because they were emotionally affected, or the songs brought them good memories from the past. To memorize the song they actively use various strategies. Online classroom should carefully create and design assignment that can activate self-directed learning to meet students’ need to improve their competence.

원 저 : 의사의 진료비 심사기준 준수행동 분석

이은실 ( Eunsil Lee ),윤경일 ( Kyungil Youn ) 한국병원경영학회 2015 병원경영학회지 Vol.20 No.2

This study was conducted by extending Ajzen`s Theory of Planned Behavior(TPB) model in analyzing physician`s observance behavior of National Health Insurance review standards. An extended TPB model was proposed by including ``background knowledge` and ``organizational commitment` in original model to predict physician``s review standards observance behavior. Surveys for data collection were carried out on the physicians who were working in a general hospital, clinics, specialized hospitals, local medical centers and long term care hospitals located in Daegu and Kyoung-Buk province in Korea. Two hundreds twenty copies of questionnaires were distributed and 166 physicians responded. Data were analyzed using a structural equation model. The results show that an affirmative attitude and subjective norms have significant positive effects on physicians` behavior of observing review standards. However, the effect of perceived behavioral control on intention to behavior is not significant. The organizational commitment and background knowledge have a positive effect on the intention of observance of review standards. In conclusion, because physician`s observance behaviors are affected by background knowledge and organizational commitment as well as attitudes, subjective norms, hospital managements should establish a communication system to share information on the review standards among physicians and provide appropriate measures to increase physician``s organizational commitment.

사회복지공무원의 직무스트레스와 소진과의 관계에서 마음챙김의 매개효과

이은실 ( Eunsil Lee ),정주연 ( Juyeon Jeong ),금창민 ( Changmin Keum ) 사단법인 아시아문화학술원 2021 인문사회 21 Vol.12 No.5

본 연구는 사회복지공무원의 직무스트레스가 소진에 미치는 영향과 마음챙김의 매개효과를 확인하기 위해 진행되었다. 전국 지자체에 근무하는 사회복지공무원을 대상으로 설문조사를 하여 189부의 응답자료 중 184부의 자료를 분석에 활용하였다. 매개효과 분석을 위해 SPSS PROCESS Macro Model 4.0을 활용했으며, bootstrap을 사용하여 간접효과의 유의성을 확인하고자 하였다. 연구결과로는 첫째, 사회복지공무원의 직무스트레스, 마음챙김, 소진은 유의한 상관관계가 있는 것으로 나타났다. 사회복지공무원의 직무스트레스는 마음챙김에 부적 영향을, 그리고 소진에 정적 영향을 미치는 것으로 나타났으며, 마음챙김은 소진에 부적 영향을 미치는 것으로 나타났다. 둘째, 연구모형의 매개효과를 검증한 결과, 직무스트레스가 마음챙김을 매개하여 소진에 미치는 간접효과의 유의성이 검증되었다. 마지막으로, 이러한 결과를 통해 사회복지공무원의 직무스트스레스로 인해 소진이 발생할 수 있으며 이러한 부정적 영향을 줄이는 데에 마음챙김이 도움이 될 수 있다는 것을 언급하였다. 위의 결과를 토대로 사회복지공무원에게 적용할 수 있는 마음챙김 프로그램 개발 및 지원의 필요성을 논의하였다. This study was conducted to confirm the effect of job stress on burnout and the mediating effect of mindfulness of social welfare officials. A survey was conducted on social welfare officials working in local governments across the country, and data from 184 copies out of 189 responses were used for analysis. SPSS PROCESS Macro Model 4.0 was used for mediating effect analysis, and the significance of the indirect effect was checked using bootstrap. As a result of the study, first, there was a significant correlation between job stress, mindfulness, and burnout. The job stress of social welfare officials was found to have a negative effect on mindfulness and a positive effect on burnout. Also, it was found that mindfulness had a negative effect on burnout. Second, as a result of examining the mediating effect of the research model, the significance of the indirect effect of job stress on burnout by mediating mindfulness was verified. Finally, it was mentioned that burnout can occur due to job stress of social welfare officials, and that mindfulness can help reduce these negative effects. Based on the results, the necessity of developing and supporting a mindfulness program that can be applied to social welfare officials was discussed.

전류패턴을 이용한 스파스 매트릭스 컨버터의 개방사고 진단

이은실(Eunsil Lee),이교범(Kyo-Beum Lee) 전력전자학회 2011 전력전자학술대회 논문집 Vol.2011 No.7

본 논문은 스파스 매트릭스 컨버터(Sparse matrix converter)의 단일 스위치 또는 두 개의 스위치의 개방 사고에 대한 진단 방법을 제안한다. 스파스 매트릭스 컨버터는 단방향 전력용 스위치의 개수를 줄이면서 기존의 매트릭스 컨버터와 동일한 성능을 갖는 새로운 토폴로지이다. 제안된 기법은 입력과 출력의 전류를 이용하여 만든 패턴을 비교하여 고장 진단뿐 아니라 고장 난 스위치의 위치까지 식별할 수 있다. 시뮬레이션 결과를 통해 제안한 기법의 타당성을 검증한다.

담양군 죽초액의 휘발성성분 분석

이은실(Eunsil Lee),장혜진(Hyejin Jang),이송진(Songjin Lee),하재호(Jaeho Ha) 한국분석과학회 2013 분석과학 Vol.26 No.5