용융액 - 결정 경계면의 형태학적 안정성에 대한 수치해석 제1부 : 회분식 방향적 응고 공정

오현정,배진찬,강인석 ( Hyun Jung Oh,Jin Chan Bae,In Seok Kang ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.4

A connection between the process conditions and the morphology of the melt-crystal interface has been sought by studying a simple batch type directional solidification model. Our model is based on the continuum diffusion equations for the heat and mass transport with both the buoyancy force effect and the solute diffusion effect in solid phase being neglected. The dynamical behavior of the interface has been investigated by the linear stability analysis and the boundary integral equation method. The results from the linear stability analysis show that the interface is stable to the infinitesimal disturbances superposed on the flat interface in both cases of pure melt and melt with solute. It is also found from the numerical results that the stability of the interface is extended even to the finite size disturbances.

초크랄스키 공정에서 결정 - 용융액 계면의 형태에 관한 수치해석적 연구

오현정,정자훈,강인석 ( Hyun Jung Oh,Ja Hun Jeong,In Seok Kang ) 한국화학공학회 1995 화학공학의이론과응용 Vol.1 No.1

NiTi Rotary Instruments에 의한 근관형성이 치근단부 근관형태에 미치는 영향

오현정,홍찬의,조용범,Oh, Hyun-Jung,Hong, Chan-Ui,Cho, Yong-Bum 대한치과보존학회 1997 Restorative Dentistry & Endodontics Vol.22 No.1

During preparation of narrow curved canals, procedural accidents such as, ledge, zipping, and transportation are frequently encountered and may lead to failure of endodontic therapy. To reduce these procedural errors and efficiently manage curved canals, various modifications in instrumentation technique and the design and flexibility of instruments have been advocated. This study compared the maintenance of the original canal curvature, cross sectional canal shape, and preparation time during instrumentation with stainless steel hand (K-Flexo) file, and nickel-titanium rotary files (Profile and Lightspeed). Thirty resin blocks with simulated curved canals of 20~25 degrees were used and divided into three groups of 10 each. In group 1, canals were instrumented using a quarter turn/pull technique with K-Flexofiles. Group 2 canals were prepared with rotary NiTi Profiles. Group 3 was prepared with rotary NiTi Lightspeed instrument. Before and after instrumentation, all canals were scanned using stereo microcope, FlexCam camera, and Photoshop 3.0 computer program. The results were as follows : 1. All groups showed some loss of canal curvature after instrumentation. Average loss of canal curvature was 8.6 degrees for K-Flexofile, 7.7 degrees for Profile, and 5.8 degrees for Lightspeed. Lightspeed exhibited significantly less curvature loss than K-Flexofile (p<0.05). 2. At the apical 1-mm level, Profile produced significantly rounder canals than Lightspeed (p<0.05). At the 3-mm level, Profile and Lightspeed exhibited significantly rounder canals than K-Flexofile (p<0.05). 3. Preparation with Lightspeed was significantly faster than Profile and K-Flexofile, and Profile was faster than K-Flexofile (p<0.05). 4. There was no significant difference in incidence of zipping between the hand K-Flexofile and rotary NiTi (Profile and Lightspeed) instruments. Most of apical canals were slightly widened near the apical foramen. As a results of this study, rotary NiTi instruments are superior to the K-Flexofile in regard to the maintenance of original canal curvature, cross-sectional shape and preparation time. But more investigations and studies should be needed to evaluate the ideal canal instrumentation.

외식관련 SNS 이용 속성이 소비자의 외식동기, 외식만족도 및 삶의 질에 미치는 영향

오현정,윤지영,정희선,Oh, Hyun-Jung,Yoon, Jiyoung,Jeong, Hee Sun 한국식품영양학회 2014 韓國食品營養學會誌 Vol.27 No.6

The object of this study was to employ effective marketing methods using SNS by determining how food-related SNS usage characteristics have influence on dine-out motivation and restaurant satisfaction and how this affects people's quality of lie. Survey respondents were men and women who have had used some kinds of food-related SNS. The survey included general characteristics of respondents, food-related SNS usage characteristics, dine-out motivation, restaurant satisfaction, and food-related quality of life. Food-related SNS usage characteristics were divided into convenience, effective time-spending, and informative; Dine-out motivation was sorted into entertainment motivation and social motivation by factor analysis. Analysis of the connections between the variables by AMOS showed that among food-related SNS usage characteristics, convenience did not have a significant influence on either entertainment or social motivation. Informative had a positive effect on entertainment motivation (p<0.05), but not on social motivation. On the other hand, effective time-spending through food-related SNS had an impact on both entertainment (p<0.001) and social (p<0.05) motivation. Moreover, the effect of dine-out motivation on restaurant satisfaction showed that entertainment motivation (p<0.05) and social motivation (p<0.01) both have significant influences on restaurant satisfaction. Also, restaurant satisfaction turned out to affect quality of life (p<0.05). As a result of this study, the usage of food-related SNS did not directly influence customers' restaurant satisfaction and quality of life; (p<0.05). As a result of this study, the usage of food-related SNS did not directly influence customers' restaurant satisfaction and quality of life; however, it had an impact on dine-out motivation and gain pleasure of dining out and help improve the quality of life in the long run; thus, it is believed that marketing strategies thorough SNS by restaurant industry are required.

수능 일본어Ⅰ의 문법 항목 및 난이도 분석

오현정 ( Oh Hyun-jung ) 한국일어교육학회 2017 일본어교육연구 Vol.0 No.41

본고는 ‘수능 일본어Ⅰ’을 준비하는 학습자 및 지도 교사들에게 학습 범위를 명확히 제시하고, 수능 일본어의 난이도를 파악하기 위해 2015학년도부터 2017학년도까지 3년간 ‘수능 일본어Ⅰ’에 사용된 문법 항목을 조사한 기초자료이다. 조사 결과는 다음과 같다. ①조사류를 분석한 결과, ‘격조사>とりたて조사>접속조사>종조사>병렬조사’ 순으로 사용 빈도가 높고, 의사소통 기본 표현에 포함되지 않은 조사도 사용되고 있다. ②술어의 활용형을 분석한 결과, ‘비과거 긍정형’, ‘연체수식형’, ‘과거 긍정형’, ‘비과거 부정형’ 등의 순으로 사용 빈도가 높고, 동사의 가능형, 수동형, 권유형 등은 활용형을 직접 묻거나 다양한 의미를 묻는 문항으로 사용되고 있다. ③보조 동사를 분석한 결과, ‘ている’, ‘てくれる’ ‘てくる’ ‘てもらう’ 등의 순으로 사용 빈도가 높고, ‘ておく’ ‘てしまう’ ‘てみる’ ‘ていく’ 등은 매우 소극적으로, 자주 사용되는 보조 동사가 비교적 명확하다. ④표현 문형을 분석한 결과, ‘のだ’, ‘たい’ ‘という’ ‘てください’ 등의 순으로 사용 빈도가 높으며, 매년 다른 형태가 사용되고 있어 학습 부담이 큰 영역이다. 이상, 본고의 결과는 ‘수능일본어Ⅰ’에 사용되는 문법 항목 및 사용 빈도를 명확히 파악할 수 있어 우선적으로 학습해야 할 범위를 설정하는데 도움이 될 것이다. 금후 본고의 결과를 바탕으로 ‘수능 일본어Ⅰ’의 평가 요소별 문항을 면밀히 분석하여, 고등학교에서 실시되고 있는 일본어 교육과 ‘수능 일본어Ⅰ’의 연계성에 관해 논하고자 한다. As a basic study on the grammar items used for 'Japanese Language I for the College Scholastic Ability Test' for three years from 2015 to 2017, this paper aims to clearly present the range of learning to teachers and learners preparing for 'Japanese Language I for the College Scholastic Ability Test', and also to understand the difficulty of Japanese language for the College Scholastic Ability Test. The results are as follows: ① The analysis of propositions shows that the frequency of use was high in the order of ‘case postposition>とりたて(toritate) postposition>connective postposition>ending postposition>parataxis postposition’ while there was a postposition used that was not included in the basic expression of communication. ② The analysis of the conjugated from of predicates shows that the frequency of use was high in the order of ‘present affirmative form’, ‘noun modifying form’, ‘past affirmative form’, and ‘present negative form’ while the possible form, passive form, and suggestive form of verb were used for questions to directly ask the conjugated form or diverse meanings. ③ The analysis of the auxiliary verbs shows that the frequency of use was high in the order of ‘ている(teiru)’, ‘てくれる(tekureru)’ ‘てくる(tekuru)’ ‘てもらう(temorau)’ while ‘ておく(teoku)’ ‘てしまう(teshimau)’ ‘てみる(temiru)’ ‘ていく(teiku)’ were very passive with relatively-clear auxiliary verbs frequently used. ④ The analysis of the expression sentence structure shows that the frequency of use was high in the order of ‘のだ(noda)’, ‘たい(tai)’ ‘という (toiu)’ ‘てください(tekudasai)’, which is the area with high pressure of learning as different forms are used every year. The results of this study would be helpful to set up the range of preferential learning, by clearly understanding the grammar items/use frequency shown in 'Japanese Language I for the College Scholastic Ability Test'. In the future, based on the results of this study, it aims to discuss the connectivity of 'Japanese Language I for the College Scholastic Ability Test' and Japanese language education of high school, by closely analyzing sentences in each evaluation element of 'Japanese Language I for the College Scholastic Ability Test'.

연체수식어로서 사용되는 부사의 어순

오현정(Hyun Jung Oh) 한국일본어문학회 2002 日本語文學 Vol.14 No.-

N/A N/A

통합적 기업이미지 관리에서의 칼라마케팅의 역할

오현정(Oh Hyun-jung),이혜선(Lee Hyesun) 한국색채학회 2005 한국색채학회 논문집 Vol.19 No.1

한국인 일본어 학습자의 자타동사의 오용에 관한 고찰 : 유대 자타동사를 중심으로

오현정 ( Hyun Jung Oh ) 韓國日語日文學會 2009 日語日文學硏究 Vol.70 No.1

사람과 상호작용하는 소셜 로봇을 위한 인공지능 기반 스피드 퀴즈 콘텐츠의 설계와 구현

오현정(Hyun-Jung Oh),강아름(A-Reum Kang),김도연(Do-Yun Kim),정구민(Gu-Min Jeong) 한국정보전자통신기술학회 2020 한국정보전자통신기술학회논문지 Vol.13 No.6

본 논문에서는 사람과 상호작용이 가능한 소셜 로봇에서 구동할 수 있는 스피드 퀴즈 콘텐츠의 설계 및 구현 방법을 제안하고, 구현을 위해 필요한 지능 모듈을 개발하는 방법을 제시한다. 또한, 지능 모듈 블록들을 배치하고 연결하여 맵을 구성하는 과정을 통해 스피드 퀴즈 콘텐츠를 구현하는 방법을 제안한다. 최근 소프트웨어 교육이 의무화되고 프로그래밍에 대한 관심이 높아지고 있다. 하지만 프로그래밍은 프로그래밍 언어에 대한 기초 지식이 없는 학생들이 바로 접근하는 데에는 어려움이 따라, 초심자에게 적합한 블록형 프로그래밍 플랫폼에 대한 관심이 커지고 있다. 본 논문에서 사용한 블록형 프로그래밍 플랫폼은 사람과 로봇과의 상호작용을 지원하여 즉각적이고 직관적인 프로그래밍이 가능한 플랫폼이다. 본 논문에서는 스피드 퀴즈 콘텐츠를 위해 구현한 지능 모듈을 블록형 프로그래밍 플랫폼 내에서 블록화하여 사용하였다. 본 논문에서 제안하는 스피드 퀴즈 콘텐츠의 시나리오를 구현하기 위해 총 3가지의 이미지 기반 인공지능 모듈을 구현한다. 지능 모듈 외에도 다양한 기능 블록을 배치함으로써 스피드 퀴즈 콘텐츠를 구현하였다. 본 논문에서는 스피드 퀴즈 콘텐츠 시나리오를 설계한 방법과 이를 위한 지능 모듈을 구현한 방식을 제안한다. In this paper, we propose a design and implementation method of speed quiz content that can be driven by a social robot capable of interacting with humans, and a method of developing an intelligent module necessary for implementation. In addition, we propose a method of implementing speed quiz content through the process of constructing a map by arranging and connecting intelligent module blocks. Recently, software education has become mandatory and interest in programming is increasing. However, programming is difficult for students without basic knowledge of programming languages to directly access, and interest in block-type programming platforms suitable for beginners is growing. The block-type programming platform used in this paper is a platform that supports immediate and intuitive programming by supporting interactions between humans and robots. In this paper, the intelligent module implemented for the speed quiz content was used by blocking it within a block-type programming platform. In order to implement the scenario of the speed quiz content proposed in this paper, we implement a total of three image-based artificial intelligence modules. In addition to the intelligent module, various functional blocks were placed to implement the speed quiz content. In this paper, we propose a method of designing a speed quiz content scenario and a method of implementing an intelligent module for speed quiz content.

가정식생활 수첩 ‘가족밥상’을 활용한 식생활교육 모니터링 연구

오현정(Hyun-Jung Oh),김정원(Jeong-Weon Kim) 한국실과교육학회 2016 한국실과교육학회지 Vol.28 No.2

가정식생활 수첩 ‘가족밥상’은 농림축산식품부가 전국 초등학교에 배포해 온, 알림장 형식의 바른 식생활교육 자료이다. 본 연구의 목적은 ‘가족밥상’을 활용한 식생활교육의 모니터링을 통해 그 효과를 평가하고 개선방안을 마련하기 위한 것이다. 이를 위해 2014년 4월∼5월에 걸쳐 서울 및 경기도 지역 초등학교 22개교 28학급의 학생(668명), 학부모(572명), 교사(28명)를 대상으로 모니터 링을 실시하였다. 학생 및 학부모 대상으로는 수첩 활용 교육 전 설문조사와 4∼5주간의 학급별 재량 교육이 끝난 뒤 학생 및 학부모 대상으로 사후 설문조사를 실시하여 교육 전·후의 효과를 분석하 였다. 교사의 경우, 수첩 활용 교육 후 수첩의 활용도, 교육적 효과, 그리고 개선점 및 보완점을 설문하였다. 수첩 활용 교육 결과, 초등학생 및 학부모의 바른 식생활 지식 및 행태 영역에서 통계적으로 유의 미한 긍정적인 변화가 있었으며(p<.05), 행태영역보다는 지식영역의 교육적 효과가 높게 나타났다. 또한 학생의 경우, 지식영역에서 저학년보다 중학년, 중학년보다 고학년의 정답률이 높았다. 행태영 역은 교육적 변화가 없는 학년군도 나타나, 행태의 변화는 좀 더 지속적인 교육이 필요함을 확인할수 있었다. 교사들은 수첩 제작 및 활용에 대한 다양한 개선점 및 보완점을 제시하였다. 먼저 수첩 교육내용의 수준 상 배포대상을 저학년이 아닌, 중학년이나 고학년으로 변경하거나, 또는 저학년을 배포대상으로 유지할 경우, 내용의 적정화와 구성의 단순화 및 난이도 조절이 필요하다는 것이다. 또한 학생 및 학부모의 행태영역 교육효과가 지식영역에 비해 크지 않았는데, 이는 수첩 활용 교육 기간이 약 한 달 정도로 단기적이었기 때문인 것으로 판단된다. 따라서 한 학기 또는 한 학년도와 같이 장기적으로 가정식생활 수첩 ‘가족밥상’이 활용될 수 있도록 개발된다면 식생활 행태영역의 교육적 효과를 높일 수 있을 것이다. 향후 가정식생활 수첩‘가족밥상’의 개선점을 보완하고, 수첩 활용 교육에서 학부모의 참여를 높여 보다 적극적인 가정과의 연계교육이 일어난다면, 수첩을 활용한 식생활교육의 효과를 더욱 높일 수있을 것이다. Ministry for Agriculture, Food and Rural Affairs has developed and distributed a home dietary life booklet ‘Family dining table’, as an educational material to promote good food education. The objective of this research was to monitor the dietary education using the home dietary life booklet ‘Family dining table’ by assessing the educational effects on elementary school children and their parents and providing improvement plans. In this research, elementary students, parents, and teachers of 28 classes from 22 different elementary schools in Seoul and Gyunggi-Do were surveyed in April and May of 2014. Parents and students were asked to answer a series of questionnaires before and after a 4~5 week discretionary education period, and the effects of the education were analyzed. Also, a survey on the utilization and effects of the booklet was conducted on teachers after the discretionary education period, and areas for improvements were deduced. Overall, the education using the booklet was statistically effective in the category of knowledge as well as behavior and attitude of both elementary students and their parents(p<.05). For students, those in higher grades had higher percentage of correct answers than those in lower grades in the category of knowledge. However, the fact that no significant changes were observed in some student groups in behavior and attitude suggested the necessity of longer and continuous education to change them. Teachers suggested various useful ways to improve and utilize the education using the booklet. First, the level of the booklet was difficult for lower grade-students, therefore, the target for the distribution of the booklet should be middle or upper grade-students. Otherwise, simplification and rationalization of the content of the booklet are necessary to adjust the level to lower graders. In addition, the education showed more effective results in the category of knowledge towards students and parents than in the category of dietary behavior and attitude, most probably due to a short period of education around one month. Therefore, in order to achieve a more effective educational result in the category of dietary behavior and attitude, the period of education for using the booklet must be extended. The effect of dietary education using the home dietary life booklet ‘Family dining table’ could be improved greatly by changing the composition and contents of the booklet and making more parents be involved in their children’s dietary education.