치과 방사선 발생기의 성능평가에 관한 연구

정재은,정재호,강희두,이종웅,나극환,Jung, Jae-Eun,Jung, Jae-Ho,Kang, Hee-Doo,Lee, Jong-Woong,Ra, Keuk-Hwan 대한디지털의료영상학회 2009 대한디지털의료영상학회논문지 Vol.11 No.2

I think this will be valuable reference for assuring consistency and homogeneity of clarity and managing dental radiation equipment by experimentation of dental radiation equipment permanent which based on KS C IEC 61223-3-4 standard and KS C IEC 61223-2-7. Put a dental radiation generator and experiment equipment as source and film(sensor) length within 30 em, place the step-wedge above the film(sensor). Tie up tube voltage 60 kVp, tube current 7 mA and then get an each image through CCD sensor and film by changing the exposure time as 0.12sec, 0.25sec, 0.4sec. Repeat the test 5times as a same method. Measure the concentration of each stage of film image, which gained by experiment, using photometer. And the image that gained by CCD sensor, analyze the pixel value's change by using image J, which is analyzing image program provided by NIH(National Institutes of Health). In case of film, while 0.12sec and 0.25sec show regular rising pattern of density gap as exposure time's increase, 0.4sec shows low rather than 0.12sec and 0.25sec. In case of CCD sensor density test, the result shows opposite pattern of film. This makes me think that pixels of CCD's sensor can have 0~255 value but it becomes saturation if the value is over 255. The way that getting clear reception during decreasing human's exposed radiation is one of maintaining an equipment as a best condition. So we should keeping a dental radiation equipment's condition steadily through cyclic permanent test after factor examination. Even digital equipment doesn't maintain a permanent, it can maintain a clarity by post processing of image so that hard to set it as standard of permanent test. Therefore it would be more increase the accuracy that compare a film as standard image. Thus I consider it will be an important measurement to care for dental radiation equipment and warrant homogeneity, consistency of dental image's clarity through comparing pattern which is the result from factor test against cyclic permanent test.

저탄소 방청 보수모르타르 개발을 위한 기초연구

정재은,양근혁,고정완,윤인구,Jung, Jae-Eun,Yang, Keun-Hyeok,Go, Jeung-Wan,Yun, In-Gu 한국건설순환자원학회 2014 한국건설순환자원학회 논문집 Vol.2 No.2

이 연구는 플라이애쉬와 고로슬래그를 치환한 방청 폴리머 보수모르타르의 개발을 위한 기초실험이다. 주요변수는 폴리머 수지 치환율, GGBS와 FA 치환율 및 방청제 치환율이다. 주요 측정항목은 초기슬럼프, 재령별 압축강도, 재령 28일 휨 강도, 건조수축 변형률이다. 실험 결과 모르타르의 압축강도 발현을 고려하였을 때 FA와 GGBS의 적정 치환율은 각각 10%와 20%로 추천될 수 있었다. 또한 방청체 치환은 모르타르의 압축강도를 감소시키는데, 적정 방청제 치환율은 1.5% 이하가 고려될 수 있었다. 한편 모르타르의 휨 강도는 ACI 318-11에서 제시하는 값인 $0.63{\sqrt{f_{ck}}}$보다 컸으며, 건조수축 변형률도 재령 10일 이후에는 ACI 209 예측값보다 낮았다. The present study prepared 13 mixes to examine fundamental mixture proportions of corrosion inhibitor repair mortars. The mortar mixes were classified into three groups according to the selected test variables which are the substitution level of polymer for Group 1, ground granulated blast-furnace slag (GGBS) and fly ash (FA) for Group 2, and corrosion inhibitor for Group 3. Based on the test results, the optimum substitution levels of GGBS and FA could be recommended as 10% and 20%, respectively, though 1-day strength of mortar significantly decreased with their substitution. Furthermore, the appropriate substitution level of corrosion inhibitor was considered to be less than 1.5%. The flexural strength of mortar tested was higher than the predictions obtained from ACI 318-11 equation. The shrinkage strain of mortar was also conservative after an age of around 10 days compared with the predictions of ACI 209.

로봇 수술을 위한 3차원 구조계산의 필요성 조사

정재은,최석윤,Jung, Jae-Eun,Choi, Seok-Yoon 대한디지털의료영상학회 2009 대한디지털의료영상학회논문지 Vol.11 No.1

Geometry calculation Using Abdominal internal organ image from traditional laparoscopy or robotic surgery system we can make depth informations through measured 3D structure informations is very helpful to doctors, depth information is mare useful then others that use traditional laparoscopy or robotic surgery system to many doctors. however, traditional method are incomplete. less experienced doctors make much mare prohability of mistake. Hence, 3D information of organ is very helpful to the less experienced doctors. it will be greate role of reducing medical accidents and surgical time. We can get 3D informations using geometrical calculation method in robotic surgical system. also suggested method is needed in traditional surgical method without the need to create a new system, finally, We can get 3D information from traditional system without any new system, it take advantage in cost and create high efficiency. mare information will provided to many doctors.

유아의 언어능력, 인지실행기능, 자기조절력이 음악능력에 미치는 영향

정재은(Jung, Jae Eun),신그린(Shin, Green),정진화(Jung, Jin Hwa) 숭실대학교 영재교육연구소 2020 Global Creative Leader Vol.10 No.1

본 연구의 목적은 유아의 음악능력과 언어능력, 인지실행기능, 자기조절력 간의 관계를 밝히고 유아의 음악능력에 언어능력, 인지실행기능, 자기조절력이 미치는 영향을 분석하고자 한다. 연구대상은 3-5세 유아 총 185명이며, 평균월령은 59.87개월이었다. 연구자료는 ‘음악 오디에이션 초급 측정 검사’, ‘수용·표현어휘력 검사’, ‘인지실행기능 검사’, ‘자기조절력 검사’를 통해 수집하였다. 수집된 연구자료는 Pearson 적률상관과 단계적 중다회귀로 분석을 통해 검증하였다. 연구결과, 유아의 음악능력, 언어능력, 인지실행기능, 자기조절력은 정적 상관이 있는 것으로나 나타났다. 유아의 언어능력이 음악능력에 영향을 미치는 가장 강력한 예측변인인 것으로 나타났으며, 다음으로 인지실행기능은 유아의 언어능력에 영향을 미치는 추가적인 예측변인으로 나타났다. 또한 하위요인 별로 분석한 결과, 언어능력의 하위요인인 표현언어가 가장 강력한 예측변인으로 나타났으며, 다음으로 인지실행기능의 하위요인인 전환이 유아의 음악능력에 유의미하게 영향을 미치는 추가적 예측변인으로 나타났다. The purpose of this study is to examine the relationships among language ability, cool executive function, self-regulation on music ability for young children. The subjects of this study were 185 whose mean age was 59.87 months. The measurement instruments ‘The Primary Measure of Music Audiation(PMMA)’, ‘Receptive and Expressive Vocabulary Test(REVT)’, ‘Stroop-like Day-Night Task’, and ‘Self-Regulation Rating Scales for Young Children’ were used to collect data, which was analyzed using t-tests and stepwise regression analysis. Results showed positive correlations among language ability, cool executive function, self regulation and music ability for young children. Additionally, language ability was found to be a significant predictive variable for impact on children s music ability and cool executive function was a further predictive variable. Also, analysis by sub-area showed expressive language ability, a sub-area of language ability, to be a significant predictive variable, with transition, a sub-area of cool executive function as additional predictive variables.

어린이집 평가인증 제도에 대한 보육교사의 인식과 실태 분석

정재은(Eun-Jung Jung),정은정(Jae-Eun Jung) 중앙대학교 한국교육문제연구소 2012 한국교육문제연구 Vol.30 No.1

본 연구의 목적은 어린이집 평가인증 제도에 대한 보육교사의 인식과 실태를 분석하여 평가인증 제도의 효율적인 수행과 성공적인 정착을 위한 방안을 모색하는 데 있다. 어린이집 평가인증 제도에 대한 보육교사의 인식과 실태를 분석하기 위한 설문지를 개발한 후 연구자료를 수집하였다. 개발된 설문지는 평가인증 제도에 대한 보육교사의 인식, 평가인증 준비과정에 대한 보육교사의 인식 및 실태, 평가인증 지표(7개 영역)에 대한 보육교사의 인식, 평가인증 사후관리에 대한 보육교사의 인식의 4개 영역으로 구분하여 총 36문항으로 구성하였다. 연구대상은 S시에 소재한 어린이집 중 2005년 3월부터 2011년 6월까지 평가인증을 통과한 어린이집의 보육교사 154명이었으며, 수집된 자료는 χ2-검증을 실시하여 분석하였다. 연구결과, 평가인증 제도에 대한 인식, 평가인증 준비과정에 대한 인식 및 실태, 평가인증 지표(7개 영역)에 대한 인식, 평가인증 사후관리에 대한 인식은 보육교사가 재직하고 있는 어린이집 유형에 따라 부분적으로 유의한 차이가 있는 것으로 나타났다. The purpose of this study was to analyze the status and childcare teachers' awareness of the Childcare Center Accreditation System to implement and settle down the system successfully. A questionnaire was developed based on prior literature, research and arrangements with professors and childcare teachers. The questionnaire is composed of 4 items of 36 questions related to 'general awareness of the Childcare Center Accreditation System', 'the preparatory process of the Childcare Center Accreditation System','7 indicators of the Childcare Center Accreditation System', and 'post management of the Childcare Center Accreditation System'. The Subjects used in this study were 154 childcare teachers who work for childcare center passed the Accreditation System from March, 2005 to June, 2011 in S province. Data analysis was conducted by χ2-test. The results of this study indicated that there were partially significant differences among childcare teachers according to the types of childcare center.

사물인터넷을 활용한 스마트 독서실 설계

정재은(Jae-Eun Jung) 한국정보과학회 2014 한국정보과학회 학술발표논문집 Vol.2014 No.12

유아의 문제행동 지도 시 겪게 되는유아교사의 어려움과 요구

정재은(Jung, Jae Eun) 숭실대학교 영재교육연구소 2020 Global Creative Leader Vol.10 No.4

본 연구는 문제행동 유아의 지도 과정에서 유아교사가 경험하게 되는 직·간접적인 어려움을 살펴보고 유아교사가 유아의 문제행동 지도 시 요구되는 것이 무엇인지 알아보는데 그 목적이 있다. 이를 위해 유아의 문제행동으로 인해 어려움을 겪었던 유아교사 3명을 연구대상으로 선정하였고,개별 심층면담 2-3회를 실시하였다. 연구결과 문제행동 유아 지도 시 교사가 느끼는 어려움으로는(1) 교사로서의 권위 하락, (2) 교사의 직무스트레스의 가중, (3) 희망없음의 3가지 주제와 하위주제가 도출되었으며, 유아교사가 문제행동 유아를 지도할 때 교사가 유아를 포기하지 않기 위한 방안으로 3개의 하위주제가 도출되었다. 도출된 주제에 따른 결과를 기반으로 유아교사들이 유아의 문제행동 지도 시 겪게 되는 어려움의 요인을 확인하고 유아교사의 문제행동 지도를 위해 필요한 시사점에 대해 논의하였다. The purpose of this study is to examine the direct and indirect difficulties experienced by earlychildhood teachers in guiding children having problem behaviors and to find out what is requiredwhen teachers guided children’s problem behaviors. Three teachers were selected whoexperienced dilemmas while guiding children’s problem behaviors. Each participant wasindividually interviewed 2 or 3 times with deliberated questions for collecting data. After theinterview was analyzed, the contents were categorized into three major themes and eight subthemes. The three major themes were (1) a decline in authority as a teacher, (2) a behavior thatincrease to the stress of a teacher, and (3) hopelessness. The sub-themes were derived as a wayfor teachers to not give up on a child having problem behavior. Based on these results, severalspecific implications for effective ways of reducing young children’s problem behavior weresuggested.

인테리어 공사비 산정에 영향을 주는 변동요인에 관한 연구

정재은(Jung, Jae-Eun),권영성(Kwon, Young-Sung) 한국실내디자인학회 1998 한국실내디자인학회논문집 Vol.- No.16

FEM 해석에 의한 자동차 A/C controller의 고장 메커니즘 분석

정재은(Jae-Eun Jeong),김태환(Tae-Hwan Kim),정창용(Chang-Yong Jung),이정윤(Jung-Yoon Lee),오재응(Jae-Eung Oh) 한국정밀공학회 2011 한국정밀공학회 학술발표대회 논문집 Vol.2011 No.6월

국내대학 패션분야 교육의 특성화를 위한 교육과정 개발 -패션비즈니스 교육을 중심으로-

정재은 ( Jae Eun Jung ),이주원 ( Choo Won Lee ),한연희 ( Yeon Hee Han ) 한국패션비즈니스학회 2011 패션 비즈니스 Vol.15 No.1

In order to develop a new fashion business curriculum, this study attempts to evaluate fashion business curriculum in both domestic and foreign schools and to analyze their existing training programs. The results of this study shows that the analysis of domestic fashion business curriculum shows that ``in the field`` knowledge is in need for the new fashion education program where students can be more exposed to the industry environments especially in the area of markets, sales, distribution and management. Also, the analysis of fashion marketing curriculum of F.I.T and PARSONS school of design demonstrates their emphasis on practical as well as academic programs in marketing, distribution and merchandising. In addition, the research on sales person training program reflects that future sales persons will need stronger knowledge in customer analysis, product display and shop management. Based on these findings, this investigation proposes a revised second year fashion business undergraduate program. The academic program in this updated module will place heavier emphasis on such fields as marketing, distribution, product planning and sales management. Also recommended is that the second year students will be exposed to real-world experience by participating in various internships and workshops offered by major companies in the fashion field.