머신러닝 기반 시설재배 딸기 생산량 예측 연구

오한별,신창선,임종현,양승원,조용윤 (사)한국스마트미디어학회 2022 스마트미디어저널 Vol.11 No.5

최근 농업 현장에서는 빅데이터와 IoT(Internet of Things) 등 기술을 적용하여 디지털농업 스마트팜으로 자동화를 하고 있다. 이러한 스마트팜은 작물의 환경을 측정하고 데이터를 조사하고 가공하여 생산량의 증대와 작물의 품질을 향상하고자 한다. 생산량 예측은 첨단 농업인 스마트팜 디지털 농업에서 중요한 연구로 빅데이터를 활용하여 환경데이터를 분석하고 나아가 생육정보 데이터 품질 관리를 위한 표준화 연구가 필요하다. 본 논문에서는 스마트팜 딸기 농장에서 수집된 환경 및 생산량 데이터를 분석하여 연구하였다. 회귀분석을 기반으로 릿지회귀(Ridge Regression), LightGBM, XGBoost를 사용하여 작물 생산량 예측 모델을 분석하였다. 3가지 모델 중 최적의 모델은 XGBoost로 R2는 82.5%의 설명력을 보였다. 연구 결과 양액흡수량과 환경데이터간의 상관관계를 확인할 수 있었고, 생산량 예측 연구에 대한 유의미한 결과를 얻을 수 있었다. 향후 작물의 생육환경 정보 및 양액의 성분 등 양액흡수량을 연구하여 양액관리를 통해 환경오염 예방 및 양액 절감에 기여할 것으로 기대된다. Recently, agricultural sites are automating into digital agricultural smart farms by applying technologies such as big data and Internet of Things (IoT). These smart farms aim to increase production and improve crop quality by measuring the environment of crops, investigating and processing data. Production prediction is an important study in smart farm digital agriculture, which is a high-tech agriculture, and it is necessary to analyze environmental data using big data and further standardized research to manage the quality of growth information data. In this paper, environmental and production data collected from smart farm strawberry farms were analyzed and studied. Based on regression analysis, crop production prediction models were analyzed using Ridge Regression, LightGBM, and XGBoost. Among the three models, the optimal model was XGBoost, and R2 showed 82.5 percent explanatory power. As a result of the study, the correlation between the amount of positive fluid absorption and environmental data was confirmed, and significant results were obtained for the production prediction study. In the future, it is expected to contribute to the prevention of environmental pollution and reduction of sheep through the management of sheep by studying the amount of sheep absorption, such as information on the growing environment of crops and the ingredients of sheep.

대학 무용표현력 교육 프로그램 개발을 위한 요구도 조사+

오한별,정승혜,안병주 무용역사기록학회 2024 무용역사기록학 Vol.72 No.-

The purpose of this study is to analyze the educational demands for dance expression skills among dance major college students. The research methodology involved conducting a survey of 297 dance major college students, and frequencies and percentages were derived for each item. As a result, it was found that dance major college students hope for instructors who excel in dance expression skills and demand courses divided based on students' abilities, focusing on techniques during each session, ranging from 1 to 6 months in duration, twice a week during the first semester of the second year, with each session lasting 30 to 60 minutes. This reflects the value of university dance expression education guidelines that respond to demand-centered requirements.

신재생 에너지 최적 활용을 위한 축열조 온도 예측 모델 연구

오한별,장경민,오지영,이명배,박장우,조용윤,신창선 (사)한국스마트미디어학회 2023 스마트미디어저널 Vol.12 No.10

Recently, energy consumption for heating costs, which is 35% of smart farm energy costs, has increased, requiring energy consumption efficiency, and the importance of new and renewable energy is increasing due to concerns about the realization of electricity bills. Renewable energy belongs to hydropower, wind, and solar power, of which solar energy is a power generation technology that converts it into electrical energy, and this technology has less impact on the environment and is simple to maintain. In this study, based on the greenhouse heat storage tank and heat pump data, the factors that affect the heat storage tank are selected and a heat storage tank supply temperature prediction model is developed. It is predicted using Long Short-Term Memory (LSTM), which is effective for time series data analysis and prediction, and XGBoost model, which is superior to other ensemble learning techniques. By predicting the temperature of the heat pump heat storage tank, energy consumption may be optimized and system operation may be optimized. In addition, we intend to link it to the smart farm energy integrated operation system, such as reducing heating and cooling costs and improving the energy independence of farmers due to the use of solar power. By managing the supply of waste heat energy through the platform and deriving the maximum heating load and energy values required for crop growth by season and time, an optimal energy management plan is derived based on this.

사립유치원 주임교사로 살아가는 이야기

오한별 ( Han-byul Oh ),이대균 ( Dae-kyun Lee ) 한국어린이문학교육학회 2016 어린이문학교육연구 Vol.17 No.2

본 연구는 현재 사립 유치원에서 주임교사로 근무하고 있는 교사가 어떤 어려움을 겪고 있으며 그어려움을 해결해나가는 방법에는 무엇이 있는지, 또한 주임교사로서 느낄 수 있는 보람에는 어떤 것들이 있는지 알아보고자 하였다. 본 연구의 연구 참여자는 D광역시 내에 있는 사립유치원에서 주임교사로 근무하고 있는 교사 10명을 선정하였다. 주임교사의 어려움을 알아보고자 심층면담, 전화면담을 병행하였으며 연구기간은 4개월에 걸쳐 진행되었다. 연구결과 사립유치원 주임교사가 겪는 어려움으로는 첫째, 교사 경력이 낮거나 해당 연령을 이동하는 등 준비가 되어있지 않은 상태에서 주임역할을 하게 되었고 둘째, 유치원 전반적인 업무를 평교사들보다 더 과중된 업무를 처리하였다. 셋째, 평교사들을 이끌어가는 과정에서 다른 교사들을 먼저 챙기게 되면서 자신의 일은 뒤로 미루어지고 있었다. 넷째, 주임교사는 ‘어떤 일이든 잘 처리해야 한다.’ 라는 주변사람들의 기대감으로 부담감을 가지고 있었고 다섯째, 동료교사들과의 관계에서 어려움이 있었으며 여섯째, 업무과중으로 인해 우리 반 아이들에게 미치는 부정적인 영향이 있었다. 또한 주임교사가 어려움을 극복하는 방법으로는 첫째, 동료교사와의 대인관계 극복하기 둘째, 선배교사에게 조언구하기 셋째, 자신만의 스트레스 해소 찾기가 있었다. 마지막으로 주임교사가 느끼는 보람에는 첫째, 동료교사들에게 인정받는 성취감 둘째, 상사에게 인정받는 성취감 셋째, 교사로서의 자신의 성장에 만족감이 있었다. This research investigated the difficulties that head teachers face, how they could solve those difficulties, and what would be a sense of satisfaction while working as head teachers at private kindergartens. This study provides understanding and suggestions for the role of the incumbent of future head teachers at private kindergartens. To examine the difficulty of head teachers, we conducted deep interviews and telephone interviews at the same time for over 4 months. Thus, the difficulties that head teachers of private kindergartens experience are presented, First, because they are not ready for the job, the head teachers that are appointed feel pressure. Second, head teachers at kindergartens had too much works to do. Third, in the process of continuing to lead their teaching staffers, they faced problems and therefore, they had to postpone their work. Fourth, they burdened from the expectations of the surrounding people, that is, the head teachers must do all work well. Fifth, they had difficulties in forming working relationship with their colleague teachers. Sixth, they are concerned about a negative impact on their children caused by too much work from their duties as head teachers. To overcome the difficulties experienced by head teachers, first, they should strive to continual overcome the difficulties in interpersonal relationships with colleagues teachers. Second, they should try to solve the difficult situation while consulting on the matters with the superiors or senior teachers. Third, they should try to relieve their stress in health manner. Finally, for sense of satisfaction by head teachers, they felt a sense of accomplishment when recognized by their colleague teachers. Second, there was a sense of accomplishment when recognized by their superiors (by owner or director) Third, they were satisfied with their growth as a teacher.

스마트팜 환경데이터 기반 파프리카 생육 예측 모델 연구

오한별(HanByeol Oh),장경민(KyeongMin Jang),임종현(Jonghyun Lim),이명배(MyeongBae Lee),신창선(ChangSun Shin) 한국통신학회 2022 한국통신학회 학술대회논문집 Vol.2022 No.2

농업 현장에 적용된 IoT(Internet of Things) 및 통신 시스템 기술은 첨단 농업인 스마트팜으로의 발전을 견인하고 있다. 특히 농업에서 차지하는 비중이 큰 파프리카와 같은 원예작물의 생산성을 향상시키고 생육비용을 줄일 수 있는 데이터 기반의 생육모델 개발 요구가 증가되고 있다. 따라서 본 연구에서는 스마트팜 환경 및 생육 데이터를 활용하여 파프리카의 생육 예측모델을 연구하고자 한다. 스마트팜에서 수집된 환경 및 생육데이터를 전처리하고, 데이터 병합을 진행한다. 이러한 전처리 과정 이후 다중선형회귀(Multiple Linear regression)를 통해 엽장과 엽폭을 분석하여 생육 예측 모델을 제시한다. 분석된 결과값을 활용하면 스마트팜 시스템 환경 운영 및 작물 최적 생육에 필요한 온실 환경제어 시스템의 개선을 기대할 수 있다.

주방 공간을 통해 본 아파트의 공간변화

오한별(Oh, Han-Byeol),최문규(Choi, Moon-Gyu) 대한건축학회 2018 대한건축학회 학술발표대회 논문집 Vol.38 No.1

The purpose of this research is to study and analyze the transformation of kitchen space and how the importance of this space has been developed, which had been considered as a female-related space, through the analysis of area and integration degree. The selected research domain is focused on 3LDK floor plan layout with the floor area of 105 that is generally distributed in South Korea, and Space Syntax is utilized as a research methodology evaluating Convex Spaces in apartments. As a result of social advancement of women and changes in social awareness, the size of the floor area in living room has been increased. Also, the degree of integration in living room space has risen up than that of DK space since 2006. Therefore, it can be seen that DK space, a female housework space, is transforming into a communal space for family members.

관절각 측정을 위한 적외선 각도 센서 연구

오한별(Han-Byeol Oh),김지선(Ji-Sun Kim),김아희(A-Hee Kim),고봉준(Bong-Jun Goh),김준식(Jun-Sik Kim),이은숙(Eun-Suk Lee),최주현(Ju-Hyeon Choi),전재훈(Jae-Hoon Jun) 대한전기학회 2015 전기학회논문지 Vol.64 No.5

Joint angle generally can be measured to check the recovery process in rehabilitation field. This paper suggests to measure joint angle with Infrared sensor based on triangulation principle. We performed various experiments to find the optimal condition of the sensor’s attached distance, height, and angle. The results were compared with commercial goniometer for accuracy. The proposed infrared joint angle sensor can be effectively used in rehabilitation and sport science fields.

삼각측량 원리 기반 광학센서를 이용한 굽힘각 측정 방법

오한별(Han-Byeol Oh),정구인(Gu-In Jung),김지선(Ji-Sun Kim),이태희(Tae-Hee Lee),최주현(Ju-Hyeon Choi),박성준(Sung-Jun Park),박현지(Hyun-Ji Park),김아희(Ah-Hee Kim),전재훈(Jae-Hoon Jun) 대한전기학회 2013 대한전기학회 학술대회 논문집 Vol.2013 No.7

광학적 방법을 이용한 pH 측정

오한별(Han-Byeol Oh),김지선(Ji-Sun Kim),정구인(Gu-In Jung),이태희(Tae-Hee Lee),최주현(Ju-Hyeon Choi),김아희(Ah-Hee Kim),정현철(Hyon-Chel Jung),전대수(Dae-Soo Jeon),전재훈(Jae-Hoon Jun) 대한전기학회 2014 대한전기학회 학술대회 논문집 Vol.2014 No.7

Crystal structure of α-acetolactate decarboxylase from Bacillus subtilis subspecies spizizenii

엄지영,오한별,윤성일,Eom, Jiyoung,Oh, Han Byeol,Yoon, Sung-il The Microbiological Society of Korea 2019 미생물학회지 Vol.55 No.1

다양한 미생물은 세포와 주변의 과산화를 방지하고 여분의 에너지를 보관하기 위해 ${\alpha}$-acetolactate decarboxylase(ALDC)를 이용해 아세토인을 생성한다. 아세토인은 안전한 식품 향미 개선제이기 때문에 ALDC를 이용한 아세토인 생합성에 많은 산업체가 관심을 가지고 있다. ALDC는 ${\alpha}$-acetolactate의 탈카르복실화 반응을 통해 아세토인을 생산하는 금속 의존 효소이다. 본 논문에서는 고초균 아종 spizizenii의 ALDC(bssALDC) 결정구조를 $1.7{\AA}$ 해상도에서 보고한다. bssALDC는 두 개의 ${\beta}$-sheet가 중앙부를 형성하는 ${\alpha}/{\beta}$ 구조를 가진다. bssALDC는 중앙부의 소수성 상호작용과 주변부의 친수성 상호작용을 통해 이합체를 형성한다. bssALDC는 세 개의 histidine 잔기와 세 개의 물 분자를 이용해 아연 이온에 배위결합한다. 구조와 서열의 비교 분석에 기초하여 아연 이온과 이 주변부 bssALDC 잔기들이 bssALDC의 효소 활성부위임을 제안한다. Acetoin is generated by numerous microorganisms using ${\alpha}$-acetolactate decarboxylase (ALDC) to prevent overacidification of cells and their environment and to store remaining energy. Because acetoin has been used as a safe flavor enhancer in food products, industries have been interested in biotechnological production of acetoin using ALDC. ALDC is a metal-dependent enzyme that produces acetoin from ${\alpha}$-acetolactate through decarboxylation reaction. Here, we report the crystal structure of ALDC from Bacillus subtilis subspecies spizizenii (bssALDC) at $1.7{\AA}$ resolution. bssALDC folds into a two-domain ${\alpha}/{\beta}$ structure where two ${\beta}$-sheets form a central core. bssALDC assembles into a dimer through central hydrophobic interactions and peripheral hydrophilic interactions. bssALDC coordinates a zinc ion using three histidine residues and three water molecules. Based on comparative analyses of ALDC structures and sequences, we propose that the active site of bssALDC includes the zinc ion and its neighboring bssALDC residues.