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컨볼루션 신경망의 앙상블 모델을 활용한 마스트 영상 기반 잠수함 탐지율 향상에 관한 연구
정미애,마정목,Jeong, Miae,Ma, Jungmok 한국군사과학기술학회 2020 한국군사과학기술학회지 Vol.23 No.2
Due to the increasing threats of submarines from North Korea and other countries, ROK Navy should improve the detection capability of submarines. There are two ways to detect submarines : acoustic detection and non-acoustic detection. Since the acoustic-detection way has limitations in spite of its usefulness, it should have the complementary way. The non-acoustic detection is the way to detect submarines which are operating mast sets such as periscopes and snorkels by non-acoustic sensors. So, this paper proposes a new submarine non-acoustic detection model using an ensemble of Convolutional Neural Network models in order to automate the non-acoustic detection. The proposed model is trained to classify targets as 4 classes which are submarines, flag buoys, lighted buoys, small boats. Based on the numerical study with 10,287 images, we confirm the proposed model can achieve 91.5 % test accuracy for the non-acoustic detection of submarines.
순환적 탐구과정기술 중심 유아과학교육 모형 개발 및 적용
정미애(Jeong, MiAe),권정윤(Kwon, Jeong-Yoon) 한국영유아교원교육학회 2021 유아교육학논집 Vol.25 No.6
본 연구의 목적은 유아의 일상생활 속 경험에서 순환적 탐구과정기술 중심의 유아과학교육 모형을 개발하고 이를 적용하여 유아에게 나타난 변화를 살펴보는 데에 있다. 연구대상은 경기도의 A 어린이집 만 5세반 유아 20명(남아 10명, 여아 10명)이다. 모형 적용은 유아와 교사가 과학교육에서 질문을 기반으로 하는 탐구과정기술(관찰, 측정, 분류, 추론, 예측, 의사소통)을 순환 및 반복, 교차하여 적용한 과학활동을 16회기 동안 실시하였다. 모형을 적용한 유아들에게 나타난 변화 분석은 교사면담, 활동계획안, 활동 영상, 현장기록, 놀이관찰 등의 자료를 중심으로 이루어졌다. 연구결과로는 첫째, 유아들의 탐구과정에서 탐구능력의 변화는 자세히 관찰하기, 탐구과정에서 탐구과정기술을 활용하여 상호작용하기로 나타났다. 둘째, 유아들의 탐구과정에서 탐구태도의 변화는 탐구과정에서 호기심 갖기, 실수를 겁내지 않고 도전하기, 탐구과정을 함께하는 놀이처럼 즐기기로 나타났다. 이러한 결과는 유아의 일상생활과 과학교육의 연계에 어려움을 느끼는 교사에게 질문을 기반으로 탐구과정기술을 적용하여 유아와 상호작용하는 데 활용할 수 있는 교수모형을 제안하였다는 데 그 의의가 있다. The purpose of this study is to develop an early childhood science education model centered on cyclical inquiry process skills in the daily life experiences of young children and to apply them to examine the changes in young clildren. Twenty 5-year-old children (10 boys, 10 girls) from a daycare center in Gyeonggi-do were subjects for this study. For the model application, science activities in which infants and teachers applied question-based inquiry process skills(observation, measurement, classification, reasoning, prediction, communication) were cycled, repeated, and intersected in science education for 16 sessions. The analysis of changes in children to which this model was applied was centered on data such as teacher interviews, activity plans, activity videos, field records, and play observations. As a result of the study, first, it was found that the change in inquiry ability of children in the inquiry process was observed in detail, and the inquiry process skills was used to interact in the inquiry process. Second, the change in the inquiry attitude of children in the inquiry process was shown to be curious in the inquiry process, to challenge without fear of making a mistake, and to enjoy the inquiry process like a play. These results are meaningful in that they propose a teaching model that can be used to interact with young children by applying inquiry-based process skills based on questions to teachers who have difficulties in linking children’s daily life with science education.
한국형 원자력추진 잠수함 도입 시 벤치마킹 모델 선정을 위한 효율성 분석: 방향거리함수 모형을 중심으로
정미애(Miae Jeong),최영재(Youngjae Choi),이승진(Seungjin Lee),이정환(Junghwan Lee) 한국해군과학기술학회 2021 Journal of the KNST Vol.4 No.2
While North Korea’s SLBM threat is increasing, it is difficult to make a complete response with the current means. Nuclear-powered submarines can be an effective means of responding to North Korea’s SLBM. This study is divided into 1 and 2 phases, and in the 1st phase, the efficiency of conventional submarines and nuclear-powered submarines are compared, and in the 2nd phase, the efficient models of nuclear-powered submarines are analyzed. As a result, five classes, including Los Angeles-class and Trafalgar-class achieve 100 % efficiency among the 12 classes selected as the evaluation group.
어머니, 아버지가 인식하는 공동양육 및 행복감이 유아의 사회적 유능성에 미치는 영향
정미애 ( Jeong Miae ) 한국유아교육학회 2022 유아교육연구 Vol.42 No.6
The purpose of this study is to examine the effect of co-parenting and happiness perceived by mothers and fathers on social competence of infants. For this purpose, 865 pairs of mothers and fathers, and their infants were selected using raw data from the 7th year of the Korean Children’s Panel (2014). As for the research method, frequency analysis, reliability analysis, and Pearson’s moment correlation coefficient were obtained using the SPSS 22 program, and multiple regression analysis was performed. As a result, First, it was found that there was a correlation between mothers and fathers' joint parenting consciousness, happiness, and social ability of infants and young children. Second, it was found that the mother's co-parenting had a significant effect on self-control and cooperation, which are sub-factors of the infant's social competence, and the father's co-parenting had a significant effect on self-control, cooperation, and responsibility. Also, it was found that mother's and father's feelings of happiness had a significant effect on self-control and cooperation, which are sub-factors of children's social competence. Therefore, this study is meaningful in revealing the need for cooperative and supportive co-parenting of mothers and fathers, and positive emotions of parents that affect children's social competence.
잣나무 임분밀도에 따른 피톤치드 농도 및 임내환경 특성에 관한 연구
조예슬(Yeseul Jo),박수진(Sujin Park),정미애(Miae Jeong),이정희(Jeonghee Lee),유리화(Rheehwa Yoo),김철민(Cheolmin Kim),이상태(Sangtae Lee) 한국환경보건학회 2018 한국환경보건학회지 Vol.44 No.3
Objectives: Scientific verification for health effects has been constantly demanded through the forest healing factors. In this study, phytoncide concentration which is one of the forest healing factors, was investigated according to stand density, season and visiting time, and analyzed correlation with micrometeorology factors. Methods: Total volatile organic compounds (TVOCs) and Natural volatile organic compounds (NVOCs) were collected using a measuring instrument which is connected to an air pump with the Tenax TA tube. The 32NVOCs were selected through the detailed criteria of adequacy assessment for recreational forest. The statistical analysis (correlation and stepwise regression analysis) was conducted between phytoncide concentration and micrometeorology factors. Results: NVOCs concentration linearly increased according to stand density. The high level showed in the summer (p<0.05), and there is no significant difference according to visiting hours of the Healing forest. NVOCs is a negative correlation with solar radiation, PAR and wind direction, and a positive correlation with relative humidity and temperature (p<0.01). NVOCs increased following the increase of humidity and temperature (R 2 =0.55). Conclusions: Phytoncide linearly increased according to stand density, and showed the correlation significantly with microclimate factors. In future, these results will be utilized as a basic material to promote the generation of phytoncide, which positively influences human health promotion and manage the forest welfare space.