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        • 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.

        • 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.

        • 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.

        • KCI등재

          유아 사회극놀이 중재모형 개발 및 효과

          정재은 ( Jae Eun Jung ),지성애 ( Sung Ae Chi ) 한국유아교육학회 2013 유아교육연구 Vol.33 No.4

          본 연구는 유아 사회극놀이 중재모형들을 개발하고, 개발한 사회극놀이 중재모형들이 유아의 언어능력, 마음이론, 사회성과 창의성에 미치는 효과를 분석하여 유아교육 현장 적용 타당성을 검증하는데 목적이 있다. 기초조사, 문헌연구, 교육현장 관찰, 전문가 협의를 통해 중재모형 범주와 요소를 추출하여 ‘구조적 극놀이’, ‘주제상상 극놀이’, ‘각본중심 극놀이’ 중재모형들을 개발하였다. 개발한 중재모형들의 현장 적용 타당성을 검증하기 위해 유치원에 재원하고 있는 유아 72명(평균월령 71.17개월)을 선정하고 실험집단 세 집단을 무선으로 배정하였다. 검사도구를 사용하여 사전검사와 사후검사를 실시하고 수집된 연구자료는 ANCOVA와 LSD를 사용하여 실험처치의 효과를 비교 분석하였다. 연구결과, 각본중심 극놀이 중재모형은 유아의 언어능력과 창의성 발달에 효과적인 것으로 나타난 반면, 주제상상 극놀이 중재모형은 유아의 마음이론에 효과적인 것으로 밝혀졌고, 구조적 극놀이 중재모형은 유아의 사회성 발달에 효과적인 것으로 나타났다. The purpose of this study was to develop the Sociodramatic Play Intervention Continuums(SPIC) for young children and to analyze their effects on children`s language ability, theory of mind, social ability and creativity. For these purposes, sociodramatic play intervention types were drawn from the preliminary study of sociodramatic play, literature review, and practical application observation. Intervention types were also discussed and revised by professionals two times. Finally, the Structured Sociodramatic Play Intervention Continuum, the Thematic Fantasy Dramatic Play Intervention Continuum, and the Script Centered Sociodramatic Play Intervention Continuum were developed according to teacher`s interventions. To prove the effects of the Sociodramatic Play Intervention Continuums, seventy two children of age 5 were selected and three experimental groups were assigned through random sampling. Pre-test and Post-test were performed by each inventory tool and treatments were performed 24 times. Data were collected and ANCOVA and LSD post-hoc were used to analyze the data. The results of this study were as follows. First, the Script Centered Sociodramatic Play Intervention Continuum showed some effects on children`s language ability and creativity. The Thematic Fantasy Dramatic Play Intervention Continuum showed significant effects on children`s theory of mind and the Structured Sociodramatic Play Intervention Continuum showed significant effects on children`s social ability.

        • KCI등재

          다차원 스펙트럼 해석법을 이용한 진공청소기 출력소음의 전달경로 해석

          정재은(Jeong, Jae-Eun),이정환(Lee, Jung-Hwan),정창욱(Chung, Chang-Ook),황근배(Hwang, Geun-Bae),오재응(Oh, Jae-Eung) 한국소음진동공학회 2010 한국소음진동공학회 논문집 Vol.20 No.10

          Noise reduction of vacuum cleaner is important, according as get into standard that estimate quality of product. To reduce noise of vacuum cleaner, we need analysis of correct noise source and contribution grasping about Identified noise sources' output noise. Because noise sources' correlation exists in vacuum cleaner that is small and complicated system, analysis is not easy. In this case, we need to apply Multi-dimensional spectral analysis(MDSA) method that can remove correlation between noise sources and grasp pure contribution degree of noise sources. In this study, we take transfer path analysis between output noise and noise that measured in inside/outside of vacuum cleaner.

        • KCI등재후보

          유아의 창의성과 언어능력, 그리기 표상능력 간의 관계 분석

          정재은(Jae-Eun Jung),채영란(Young-Ran Chae) 중앙대학교 한국교육문제연구소 2014 한국교육문제연구 Vol.32 No.3

          본 연구는 유아의 창의성, 언어능력, 그리고 그리기 표상능력 간의 관계를 분석하고, 유아의 창의성에 영향을 미치는 예측변인을 밝히는데 목적이 있다. 연구대상은 유치원에 재원중인 만 5세 유아 159명으로 평균월령은 65.29개월이었으며, Torrance의 창의성 검사, 구문 의미 이해력 검사, 그리고 그리기 표상능력 검사도구를 사용하여 연구자료를 수집하였다. 수집된 연구자료는 Pearson 적률 상관계수와 중다회귀분석을 통해 검증하였다. 연구결과, 유아의 창의성은 언어능력과 그리기 표상능력 간에 부분적으로 상관관계가 있는 것으로 나타났으며, 유아의 그리기 표상능력의 하위요인인 ‘조화로운 구성’과 ‘다양한 색채’는 유아의 창의성에 유의미하게 영향을 미치는 예측변인으로 밝혀졌다. The purpose of this study was to investigate the relationships among children’s creativity, language ability, and drawing representational ability. The subjects were 159 five-year-old children attending a kindergarten located in Kdo and Ssi. The mean ages of the subjects were 65.29 months. Torrence’s Tests of Creative Torrence (TTCT), ‘The Construction Meaning Comprehension Test’, and ‘The Drawing Representation Inventory’ were used in the collection of data. The study also used Pearson’s correlation and Multi-Regression Analysis to analyze the data. The results of this study are as follows. First, there was partially positive correlation between children’s creativity and language ability. Second, there was partially positive correlation between children’s creativity and drawing representational ability. Third, it was revealed that ‘harmonious composition’ and ‘diverse color’, sub-elements of drawing representational ability were found as the predictive variables that affected children’s creativity.

        • KCI등재

          웹 환경 하에서의 제약 만족 기법에 의한 공간 계획 시스템

          정재은(Jae-Eun Jung),전승범(Seung-Bum Jeon),조근식(Geun-Sik Jo) 한국정보과학회 2000 정보과학회 컴퓨팅의 실제 논문지 Vol.6 No.2

          공간 계획 시스템(Spatial Layout Planning System)은 사용자의 요구에 따라 사각의 자원을 일정 공간 안에 할당하고 사용자의 만족도를 최대화함으로써 공간 효율성을 최적화하는 시스템이다. 공간계획 문제는 방대한 범위의 공간을 탐색해야 하므로 시간과 공간적 측면에서 높은 복잡도(Complexity)를 갖는 문제이다. 또한 특정 영역의 수정 요구나 재설계 요구와 같은 사용자의 동적인 요구 사항들을 수용할 수도 있어야 한다. 본 논문에서는 CSP(Constraint Satisfaction Problems) 해결 기법 기반의 자원 할당법을 이용함으로써 효과적으로 공간 계획 문제를 해결할 수 있도록 하였으며 사용자의 요구에 따라 변화되는 제약조건은 지능형 사용자 인터페이스 모델을 통해 좀 더 향상된 결과가 도출될 수 있도록 설계 및 구현하였다. 또한, 2차원 도면에서의 수정 요구에 대한 편이성과 시각적 검증을 위해 웹 환경 하에서의 VRML(Virtual Reality Modeling Language)을 이용한 3차원 도면을 보여준다. The spatial layout planning system allocates rectangular resources in the limited space according to user requirements. This system also can optimizes the spatial allocation problem to maximize the user's requirement. The spatial layout planning problems for this system can be solved by searching a wide area of space since this problem entails the non-polynomial algorithm. By accommodating the user's dynamic requirements, the modification of a specific space and the redesign of the whole area can be accomplished. In this paper, the spatial layout planning problem is solved efficiently with a resource allocation method based on CSP. The dynamic constraints by adding user requirements are accommodated through the intelligent user interface. The 3-D layout on the web environment by using VRML is also shown for providing for the visual verification of the 2-D layout and, thereafter, the additional modification of the 2-D layout.

        • KCI등재

          유아교사의 직무만족에 조직문화, 조직몰입 및 원장 리더십이 미치는 영향

          정재은(Jung, Jae-Eun),김성현(Kim, Seong-Hyun) 한국영유아교원교육학회 2020 幼兒 敎育學論集 Vol.24 No.3

          본 연구는 유아교사의 직무만족과 조직문화, 조직몰입, 원장 리더십 간의 관계를 분석하고, 직무만족에 영향을 미치는 예측변인을 밝히는데 목적이 있다. 이를 위하여 S시와 K시에 위치한 유치원과 어린이집의 교사 242명을 연구대상으로 자료를 수집하였으며, 수집된 자료는 Pearson 상관관계분석과 중다회귀분석을 실시하여 자료를 분석하였다. 연구결과 첫째, 유아교사의 직무만족은 조직문화, 조직몰입, 그리고 원장의 리더쉽과 통계적으로 유의미한 정적상관이 있는 것으로 밝혀졌다. 둘째, 유아교사의 학력, 원장의 거래적 리더십, 그리고 내재적 · 외재적 문화와 근속적 몰입은 직무만족의 정적예측변인으로 밝혀졌다. 이러한 본 연구결과는 유아교사의 직무만족 증진을 위한 방안 모색을 위한 기초자료로 사용될 수 있을 것이다. The purpose of this study is to analyze the relationship between preschool teachers’ job satisfaction and organization culture, organization commitment, and leadership of the principal, and to reveal the predictive variables affecting job satisfaction. The questionnaires about organization culture, organization commitment, leadership of the principal, and preschool teachers’ job satisfaction were carried out on 242 preschool teachers working in kindergartens and preschools located in S province and K province. It used Pearson’s correlation and Multi-Regression Analysis to analyze the data. The results of this study were as follows; First, there were positive relationships among preschools teachers’ job satisfaction, organization culture, organization commitment, and leadership of the principal. Second, it was revealed that teachers’ education, transactional leadership of the principal, implicit and extrinsic culture, and continued commitment were found as the prediction variables for affecting preschool teachers’ job satisfaction. The results of this study could be used as basic data for finding ways to improve job satisfaction for early childhood teachers.

        • KCI등재
        • KCI등재

          소음원의 영향이 고려된 가상 세탁음 제작을 통한 드럼 세탁기의 음질 인덱스 구축

          정재은(Jeong, Jae-Eun),양인형(Yang, In-Hyung),누룰 파와지(Fawazi, Noor),정운창(Jeong, Un-Chang),이정윤(Lee, Jung-Youn),오재응(Oh, Jae-Eung) 한국소음진동공학회 2012 한국소음진동공학회 논문집 Vol.22 No.6

          The objective of this study is to determine the effect for the sound quality according to the noise source and to build the sound quality index of the laundry noise. In order to compare laundry noise among the influence of noise sources, we made virtual laundry noises by synthesizing an actual laundry noise and each noise source such as a dropping noise, water noise, motor noise and circulation pump noise. We conducted a listening test by customers using virtual laundry noises. As a result of listening test, we found that the dropping noise has a decisive effect on the sound quality of the laundry noise. We conducted the multi regression analysis of sound quality for the laundry noise using the statistical data processing. It is verified to the reliability of the multi regression index by comparison with listening results and index results of other actual laundry noises. This study is expected to provide a guide line for improvement of the laundry noise.

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