TiN증착 조건에 따른 박막의 수명증대에 대한 실험적 연구

박일수(il soo Park) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.10

Formation of TiN films by PVD method and the DC and RF sputtering deposition method can be applied, the injected gas to generate plasma ionization rate of the film forming speed is slow away, anything to increase the adhesion between films limitations have. To improve this, to investigate the deposition and ion beam evaporation simultaneously IBAD(lon beam assisted deposition) when used, Ion beam surface coating material prior to the survey because the surface cleaning effect of a large, high film adhesion can be obtained. In addition, the high vacuum and low temperature, high purity thin fi 1m of uniform thickness in the benefits is.

스마트 폰을 이용한 블루투스 도어락 시스템 구현

박일도(Il-Do Park),김덕수(Duk-Soo Kim),김종오(Jong-O Kim) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6

By adding bluetooth communication to the usual doorlock, an doorlock controlled by smart phone is implemented in this paper. The proposed doorlock system is developed based on the Atmega128 processor, HC-05 Embedded Bluetooth Serial Communication Module, DC motor part, smart phone and general doorlock. The Android phone is adopted as an control system for doorlock, and application programs for the Android operating system(OS) are implemented by using MIT App Inventor.

에콰도르 키토에서 도시기상 특성 분석

박일수(Park, Il-Soo),장유운(Jang, Yu-Woon),이우정(Lee, Woo-Jeong),이강웅(Lee, Gang-Woong),정경원(Chung, Kyung-Won),김병곤(Kim, Byung-Gon) 한국외국어대학교 중남미연구소 2018 중남미연구 Vol.37 No.2

키토에서 우기(4월)와 건기(7월) 동안 다양한 기상 변화를 묘사할 수 있는 3차원 수치모델을 활용하여 바람 및 기온, 일사량 등을 예측하고 도시기상 및 난류 운동 특성을 분석하였다. 우기 동안 주 풍향은 북북서풍으로 평균 풍속은 3.5 m/s, 평균 기온은 17°C , 평균 습도는 75.9% 으로 건기 보다 약간 높았다. 우기 동안 총일사량에서 평균과 최고치는 각각 191 W m-2 과 1038 W m-2 , 순일사량은 평균과 최고치에서 각각 117 W m-2 와 724 W m-2 을 나타냈다. 우기에 증발 잠열이 높은 대기환경 영향으로 잠열이 현열보다 우세하였다. 건우기 동안 대류속도와 마찰속도는 0.2 ~0.4 m/s 수준으로 유사하였으나 우기에 약간 높았다. 혼합고는 평균적으로 147 m ~152 m 수준으로 낮으며 북반구 중위도 도시 지역에 비해 난류 운동은 활발하지 못하였다. 폭우로 인한 산사태와 인명 피해 등 재산피해를 예방하기 위해 지속적으로 도시기상 현상을 감시해야 하겠다. The wind, temperature, humidity, total and net solar radiation in Quito were predicted and evaluated by TAPM (The Air Pollution Model) during the wet (1 April 2017 to 15 April 2017) and dry (1 July 2017 to 15 July 2017) seasons. The prevailing wind direction during wet season was northwest with 3.5 m/s, 17 °C, 75.9 % , 191 W m-2 , 117 W m-2 averagely. The total solar radiation during the wet period was higher than one during the dry season. It was understood that this phenomena was resulted from the higher maximum and averaged temperature than those in dry season. The latent heat was higher than sensible heat because evaporated latent heat was high in wet season. The convection and friction velocity both seasons was a range of 0.2 ~ 0.4 m/s, but velocities during the wet season was a little high compared with those in dry season. The averaged mixing height in dry season were 152m with a little high compared those in wet season. The intensive of turbulence in Quito was not active in comparison with one at the urban located on middle latitude in Northern Hemisphere. To meet with extreme meteorology as heavy rain effectively, it is necessary to continuously monitor the phenomena of micro-meteorology in Quito.

팽창 응력변형을 겪는 Ge 에서 가전자대의 에너지구조 해석

박일수(Il Soo Park),전상국(Sang Kook Chun) 한국전기전자재료학회 1999 전기전자재료학회논문지 Vol.12 No.12

N/A N/A

염화철 에칭폐액의 용매추출공정 최적화에 관한 연구

박일정(Il-Jeong Park),김대원(Dae-Weon Kim),김건홍(Geon-Hong Kim),채홍준(Hong-jun Chae),이상우(Sang-Woo Lee),정항철(Hang-Chul Jung) 한국청정기술학회 2017 청정기술 Vol.23 No.3

본 연구에서는 염화철 에칭폐액 재생을 위하여 ㈜케이엠씨에서 조합한 organophosphorus acid계의 신규용매(KMC-P)를 사용하였으며, 용매추출공정에서 신규 용매에 대한 추출효율을 증가시키기 위해 공정변수를 선정하고 변수간의 상관관계를 알아보기 위해서 DOE에 따른 최적화실험을 진행하였다. 용매 농도, pH, O/A ratio가 추출, 탈거효율에 영향을 미치는 인자로 나타났으며 최적의 탈거효율을 갖는 공정조건은 용매 농도 29.4 wt%, HCl 첨가량 0 mL, O/A ratio 7일 때, 최대 69.7%의 탈거효율을 기대할 수 있는 결과를 얻었으며 신뢰 수준은 86% 이상인 것을 확인하였다. In this study, a new organophosphorus acid-based solvent (KMC-P) from KMC Co., Ltd. was used for the recovery of the iron chloride etching waste solution. In order to increase the extraction efficiency for the new solvent in the solvent extraction process, we selected the process variables and conducted the optimization experiment according to the DOE to investigate the correlation between the variables. Solvent concentration, pH, and O/A ratio were found to be factors affecting extraction and stripping efficiency. The optimum stripping efficiency was 69.7% when the solvent concentration was 29.4 wt%, the HCl addition amount was 0 mL, and the O/A ratio was 7, and the reliability was more than 86%.

경기체가의 장르적 성격과 그 변화

박일용 ( Il Yong Park ) 일지사 1987 韓國學報 Vol.13 No.1

용융 알루미늄 도금된 절탄기 강재 튜브의 고상입자 침식 특성

박일초 ( Il-cho Park ),한민수 ( Min-su Han ) 한국부식방식학회 2021 Corrosion Science and Technology Vol.20 No.6

In this paper, durability evaluation and surface damage mechanism were investigated through solid particle erosion (SPE) test after applying hot-dip aluminizing (HDA) technology for the purpose of maintenance of marine economizer tube. Damaged surface shape was analyzed using SEM and 3D microscope. Compositional changes and microstructure of the HDA layer were analyzed through EDS and XRD. Durability was evaluated by analyzing weight loss and surface damage depth after SPE. HDA was confirmed to have a two-layer structure of Al and Al₅Fe₂. HDA+HT was made into a single alloy layer of Al₅Fe₂ by diffusion treatment. In the microstructure of HDA+HT, void and crack defect were induced during the crystal phase transformation process. The SPE damage mechanism depends on material properties. Plastic deformation occurred in the substrate and HDA due to ductility, whereas weight loss due to brittleness occurred significantly in HDA+HT. As a result, the substrate and HDA showed better SPE resistance than HDA+HT.

실리콘 전력 MOSFET의 온도에 따른 항복전압 및 On 저항

朴日用(Il-Yong Park),崔然益(Yearn-Ik Choi),鄭相九(Sang-Koo Chung) 대한전기학회 2000 전기학회논문지C Vol.49 No.4

쇼트피닝이 회주철의 캐비테이션 침식 저항성에 미치는 영향

박일초 ( Il-cho Park ) 한국부식방식학회(구 한국부식학회) 2021 Corrosion Science and Technology Vol.20 No.3

In this study, optimal shot peening process conditions were investigated for improving the cavitation erosion resistance of gray cast iron under a marine environment. Shot peening was performed with variables of injection pressure and injection time. The durability was then evaluated through cavitation erosion test which was conducted according to the modified ASTM G-32 standard. The tendency of cavitation erosion damage according to shot peening process condition was investigated through weight loss rate, surface and cross-sectional analysis of the specimen before and after the test. As a result, the shot peening process condition that could minimize cavitation erosion was when the injection pressure was the lowest and when the injection time was the shortest. This was because the flake graphite exposed on the gray cast iron surface could be easily removed under such condition. Therefore, the notch effect can be prevented by surface modification. In addition, the cavitation erosion damage mechanism of gray cast iron was discussed in detail.

백워드 설계 모형의 수학과 적용 가능성 탐색: 초등학교 6학년 비율그래프 단원을 중심으로

박일수 ( Il Soo Park ) 한국교육과정학회 2012 교육과정연구 Vol.30 No.4

본 연구는 백워드 설계 모형을 적용하여 초등학교 수학과 비율그래프 단원을 개발함으로써, 백워드 설계모형의 수학과 교육과정에 주는 시사점을 도출하는 데 연구의 목적이 있다. 연구자는 백워드 설계 모형의 3단계, 즉 바라는 결과의 확인, 수용 가능한 증거 결정, 학습경험과 수업 계획의 절차에 의하여 비율그래프 단원을 개발하였다. 첫째, 본 연구에서는 초등학교 수학과 교육과정 및 교사용 지도서에 제시되어 있는 목표, 내용체계표, 성취기준, 단원목표 등을 확인함으로써, 비율그래프 단원에 대한 영속한 이해, 6가지 이해의 측면, 포괄적이고 제한적인 본질적인 질문, 핵심 지식과 핵심 기능을 개발하였다. 둘째, 본 연구에서는 GRASPS 기법을 활용하여 비율그래프 단원의 수행 과제를 개발하고, 총체적인 루브릭과 분석적인 루브릭, 그리고 기타 증거 자료 수집 방법으로 퀴즈, 지필평가, 면담, 관찰, 서술형 평가방법을 개발하였다. 셋째, 본 연구에서는 비율 그래프 단원을 매력적이고 효과적으로 수업하기 위하여, 9차시 39개의 WHERETO 요소를 개발하였다. 넷째, 본 연구에서는 비율그래프 단원에 대한 백워드 설계 템플릿(1쪽)을 개발하였다. 백워드 설계 모형을 적용하여 수학과 비율그래프 단원을 개발한 결과, 백워드 설계 모형은 수학과 교육과정 개발자로서의 교사의 전문성 신장, 실생활과 연계된 수학교육, 평가방법의 개선, 수업방법의 개선에 기여할 가능성이 있다. 백워드 설계 모형은 수학교과를 가르치는 교사의 교육과정 설계자, 평가자, 수업설계자로서의 전문성을 향상시킬 것으로 기대된다. This study aims to develop elementary mathematics ratio-graph unit by backward design. It was developed that elementary mathematics ratio-graph unit applying the three stages of backward design. First, researcher consider the goal of elementary mathematics ratio-graph unit. In order to identify desired results of ratio-graph unit, this study reviewed the goal, scope, content, achievement standards of the 2011 revised elementary mathematics curriculum, teacher guide book and textbook. And this study developed enduring understandings, the six facets of understanding, essential questions, specific knowledge and skill on ration-graph unit. Second, researcher consider evidence of learning on ratio-graph unit. This study developed 2 authentic task using GRASPS, holistic and analytic scoring rubrics, the other evidence for understanding on ration-graph unit. Third, researcher planed learning experiences and instruction for student to engage and effective learning activities using the WHERETO elements. This study developed 9 lesson 39 WHERETO elements on ration-graph unit. Fourth, this study presented 1-page template on ration-graph unit. Study findings will be provide implications that backward design will contribute to teacher``s professional growth as curriculum designer, evaluator and instruction designer on mathematics ratio-graph unit. Therefore backward design could be useful of unit design and development, lesson plan studies, assessment, teacher education program on mathematics.