회원작품 - 제주 달콤금복집

김동희,Kim, Donghee 대한건축사협회 2022 建築士 Vol.635 No.-

Preparation of Nano Sized Indium Tin Oxide (ITO) Powder with Average Particle Size Below 30 nm from Waste ITO Target by Spray Pyrolysis Process

김동희,유재근,Kim, Donghee,Yu, Jaekeun The Korean Institute of Resources Recycling 2018 資源 리싸이클링 Vol.27 No.2

In this study, waste ITO target is dissolved into hydrochloric acid to generate a complex indium-tin chloride solution. Nano sized ITO powder with an average particle size below 30 nm are generated from these raw material solutions by spray pyrolysis process. Also, in this study, thermodynamic equations for the formation of indium-tin oxide (ITO) are established. As the reaction temperature increased from $800^{\circ}C$ to $900^{\circ}C$, the proportion and size of the spherical droplet shape in which nano sized particles aggregated gradually decreased, and the surface structure gradually became densified. When the reaction temperature was $800^{\circ}C$, the average particle size of the generated powder was about 20 nm, and no significant sintering was observed. At a reaction temperature of $900^{\circ}C$, the split of the droplet was more severe than at $800^{\circ}C$, and the rate of maintenance of the initial atomized droplet shape decreased sharply. The average particle size of the powder formed was about 25 nm. The ITO particles were composed of single solid crystals, regardless of reaction temperature. XRD analysis showed that only the ITO phase was formed. Remarkably, the specific surface area decreased by about 30% as the reaction temperature increased from $800^{\circ}C$ to $900^{\circ}C$.

회원작품 - 슬로우 하우스

김동희,Kim, Donghee 대한건축사협회 2021 建築士 Vol.622 No.-

회원작품 - 커브 하우스

김동희,Kim, Donghee 대한건축사협회 2022 建築士 Vol.633 No.-

Preparation of Nanosized Palladium Oxide Powder with Average Particle Size Below 30 nm by Spray Pyrolysis Process

김동희,유재근,Kim, Donghee,Yu, Jaekeun The Korean Institute of Resources Recycling 2018 資源 리싸이클링 Vol.27 No.2

This study was conducted as a preliminary study for the recycling of palladium and palladium oxide. In this study, thermodynamic equations for the formation of palladium oxide (PdO) are established. Palladium chloride is dissolved into hydrochloric acid to generate a palladium chloride solution. Nanosized palladium oxide powder with an average particle size below 30 nm were generated from this raw material solution by means of a spray pyrolysis process. The palladium oxide particles were composed of a single solid crystal. The results of XRD analysis showed that only a PdO phase of the generated powder was formed. And, the specific surface area of the generated palladium powder was approximately $32m^2/g$.

건축담론 - 스케치, 결핍을 매만지는 손짓

김동희,Kim, Donghee 대한건축사협회 2022 建築士 Vol.639 No.-

지역사회서비스투자사업 이용자 모니터링 연구

김동희 ( Donghee Kim ) 사단법인 아시아문화학술원 2020 인문사회 21 Vol.11 No.5

지역사회서비스투자사업은 「사회서비스 이용 및 이용권 관리에 관한 법률」에 의한 등록제 시행(2012. 2. 5.)으로 제공기관이 급격히 증가하였다. 등록제 시행 목적은 시장경쟁을 통한 서비스 품질향상을 도모하는 것이다. 그러나 등록제 시행 후 제공기관 수를 수용하기도 어려울 정도로 과도한 경쟁을 일으켜 오히려 품질저하를 일으키는 상황이 되었다. 이에 본 연구는 지역사회서비스투자사업 이용자(1,600명)을 대상으로 모니터링을 통해 부정행위를 방지하기 위한 방안을 모색하는데 그 목적이 있다. 연구방법은 설문 진행 후 미 응답과 중복 데이터는 분석에서 제외시키고 데이터 코딩과 데이터 클리닝 과정을 거쳐, 통계 패키지인 SPSS 및 R-studio에 의해 통계분석을 실시하였다. 연구결과 첫째, 제공자를 통한 이용자(44.2%)가 많은 것으로 나타났다. 둘째, 제공기록지에 서명(11.5%)을 하지 않는 것으로 나타났다. 셋째, 본인부담금(10.5%)을 납부하지 않은 것으로 나타났다. 넷째, 바우처 카드를 제공기관이 보관(7.5%)하는 것으로 나타났다. 다섯째, 물품을 수령(6.0%)한 적이 있다. 이와 같이 제공자와 이용자가 부정 수급 및 부정행위가 있는 것으로 파악되었다. 이를 해소하기 위해서는 제공기관의 관리 실태를 점검하고 보다 내실 있는 사업 추진을 위한 현장 모니터링이 필요하다. 또한, 부정수급 단절을 위한 보다 과학적인 방법을 제시할 수 있는 연구가 필요하다. The implementation of the registration system under the Act on the Use and Management of Social Services (2012.2.5.) increased the number of community service investment projects rapidly. The purpose of the registration system is to improve service quality through market competition. However, after the implementation of the registration system, it caused excessive competition to the extent that it was difficult to accommodate the number of providers, resulting in lower quality. The purpose of this study is to find ways to prevent cheating through monitoring of users 1,600 people of community service investment projects. The research method excluded non-response and redundant data from analysis after investigation and went through data coding and data cleaning. After this statistical analysis was performed by statistical packages SPSS and R-studio. As a result of research, first, 44.2% of service users through providers and personnel were found to be high. and second, there were 11.5% unsigned service records, and third, 10.5% unpaid personal charges, and fourth, 7.5% storage of service provider voucher cards, and 6% receiving goods in return for services. In view of this point as such, it was found that there were fraudulent supply and demand and fraudulent activities by the provider and service user of the service. In order to solve this problem and promote more substantial projects, it is necessary to check the management status of the provider and strengthen on-site inspection and on-site monitoring. Also, research is needed to suggest more scientific methods for fraudulent supply and demand.

ARIMA와 SARIMA 시계열 분석기법을 이용한 대전지역 초단시간 일사량 선행예보모델 구축

김동희(DongHee Kim),김유정(YooJung Kim),김창기(ChangKi Kim),김현구(HyunGoo Kim),이영섭(YungSeop Lee) 한국태양에너지학회 2022 한국태양에너지학회 학술대회논문집 Vol.2022 No.10

ARIMA와 SARIMA 시계열 분석기법을 이용한 대전지역 초단시간 일사량 선행예보모델 구축

김동희(Kim DongHee),김유정(Kim YooJung),김창기(Kim ChangKi),김현구(Kim HyunGoo),이영섭(Lee YungSeop) 한국태양에너지학회 2022 한국태양에너지학회 논문집 Vol.42 No.6

Solar irradiance is a major meteorological factor affecting solar energy generation. In this study, we develop a short-term solar irradiance forecasting model with a high time resolution to accurately predict the amount of solar energy generated and apply it to the real-time energy trade market. Two types of irradiance (Global Horizontal Irradiance and Direct Normal Irradiance) data observed at Daejeon, South Korea, are predicted using two time series analysis models (the ARIMA model, which does not consider seasonality, and SARIMA model which considers seasonality), which we compared to determine the model that is better suited to performing predictions. Comparing the prediction errors from 15 to 120 minutes, using RMSE and nRMSE as evaluation indices, GHI was better predicted using the ARIMA model from 15 to 75 minutes, while the SARIMA model performed better from 90 to 120 minutes. For DNI, the ARIMA model showed higher accuracy than the SARIMA model during the entire prediction period.

중학생들의 12주간 방과 후 농구 훈련 프로그램 참여가 신체활동능력과 학습관련요인에 미치는 영향

김동희(Donghee Kim),반선미(Seonmi Ban),조성채(Sungchae Cho),국두홍(Doohong Kuk) 한국산학기술학회 2018 한국산학기술학회논문지 Vol.19 No.9

이 연구는 12주간 중학교 남학생의 방과 후 농구 훈련 프로그램 참여가 신체활동능력(심폐지구력, 유연성, 근력) 및 학습관련요인(인지강도, 인지속도, 집중력, 작업부하도)에 어떠한 영향을 주는지에 대하여 규명 하고자 총 20명의 참가자가 운동참여집단(10명)과 통제집단(10명)으로 나뉘었다. 본 연구의 통분석은 반복측정분산분석(Repeated Measure ANOVA)을 실시하고, 모든 자료의 유의수준은 α=.05로 설정하였다. 분석한 결과 신체활동능력 변인 중 운동집단의 심폐지구력과 유연성은 통계적으로 유의하게 증가하였다. 그러나 운동집단의 악력은 통계적으로 유의하지는 않지만 증가하는 경향을 보였다. 학습관련요인 변인 중 운동집단의 인지강도, 인지속도, 집중력은 통계적으로 유의하지는 않으나 증가하는 경향을 보였고, 통제집단의 작업부하도는 통계적으로 유의하게 증가하였다. 이상의 결과를 종합해보면 방과 후 농구 훈련 프로그램의 참여는 중학생의 신체적인 성장과 발달과 학업성취도 측면에 긍정적인 영향을 줄 수 있을 것이라고 생각된다. The aim of this study was to examine the effects of an after-school basketball training program of 12 weeks on physical abilities (grip strength, endurance, and flexibility) and learning-related factors (cognition strength, cognition speed, concentration, and mental workload) in middle school students. Middle school students (Males, N=20) were recruited for use in this study and were randomly divided into either a basketball training group (n = 10, BT) or a non-exercise control group (n = 10, CON). Two-way repeated measures ANOVA with post-hoc testing was used for data analysis. Results found endurance and flexibility in the BT group were significantly increased, but not in the CON group. In addition, cognition strength, speed, and concentration in the BT group increased and mental workload in the BT group slightly decreased. In contrast, the CON group showed a significant increase in mental workload. Our findings show that participation in after-school physical education activities (e.g., basketball training program) positively improves physical abilities and increases brain functions for learning.