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박효진(Park, Hyojin),위지은(Wie, Jieun),김서우(Kim, Seowoo),송윤재(Song, Yunjae),지유나(Ji, Yuna),장서영(Jang, Seo Young),김준수(Kim, Junsu),문병권(Moon, Byung-Kwon) 한국과학영재교육학회 2018 과학영재교육 Vol.10 No.1
이 연구는 전북대학교 과학영재교육원의 사사과정 과제로 수행되었다. 대기 중 미세먼지는 1군 발암물질로 지정될 정도로 위험하며, 미세먼지로 인한 사망률의 증가가 최근 논란이 되고 있다. 우리는 가정과 학교의 미세먼지 실태를 조사하고 미세먼지 농도를 감축할 수 있는 방안을 찾고자 하였다. 미세먼지 농도는 휴대용 장치를 이용하여 측정하였다. 먼저 실내의 먼지 가 외부 농도에 크게 영향을 받는다는 것을 밝혔다. 이와 더불어 집과 학교는 장소에 따라 미세먼지 농도가 약간 다르게 나타났다. 특히 집에서는 방에서, 학교에서는 교무실에서 미세먼지 농도가 낮았다. 학생들이 등교하면 교실의 농도가 증가하였다. 또한 흥미롭게도 실내의 미세먼지는 높이에 따라 약간의 농도 차이가 있었다. 미세먼지 농도는 천정부근보다는 바닥에서 약간 높았다. 기름을 사용한 요리를 할 때 집 안의 미세먼지 농도를 크게 증가시켰다. 이때는 요리가 끝난 후에도 미세먼지 농도의 증가가 지속되는 모습을 볼 수 있었다. 또한 실내의 미세먼지를 제거하기 위해 주로 제안되는 방법인 환기시키는 것이 때로는 효율적이지 못하거나 오히려 농도를 높일 수 있음을 보였다. 우리는 실내 미세먼지를 제거하기 위해서는 공기청정기가 필수적이나 여의치 않다면 에어컨을 활용할 수 있다는 것을 제시하였다. 이 결과는 좀 더 흥미로운 연구를 위한 기초자료로 활용되거나 학교나 가정의 미세먼지 저감에 기여할 것으로 기대된다. This study is based on a research project by gifted students at Science Education Institute for the Gifted in Chonbuk National University. Particulate matter is so dangerous to humans as to be ranked among the Group 1 Carcinogens, and it becomes a more prominent cause of death. This study conducted a survey of particulate matter in houses and schools and considered an effective method of reducing particulate matter concentrations. A portable device was used to measure the concentrations. We showed that indoor particulate matter was much affected by its outdoor concentration. Besides, the particulate matter concentrations had a small variation among different points both in houses and schools. Especially, houses and schools had lower concentrations in rooms and the teachers room, respectively. When students went to school, the concentrations in classrooms increased. Moreover, indoor particulate matter showed a small difference of concentration depending on height. The concentration was a little higher near the floor than the ceiling. Cooking with oils drastically increased the indoor particulate matter concentration in a house. Even when cooking was over, the increase of concentration continued. Ventilation was not so efficient as has been typically suggested to remove indoor particulate matter, or rather often raised the indoor concentrations. We proposed that an air purifier is essential for removing indoor particulate matter, or if it is not available, an air conditioner can be utilized. This result can be basic information for further interesting studies. We also expect that this study will contribute to reducing particulate matter both in house and school.
박송이 ( Song Yie Park ),채규서 ( Kyu Seo Chae ),손락호 ( Rak Ho Son ),정지혜 ( Ji Hye Jung ),임영례 ( Young Rae Im ),권지웅 ( Ji Wung Kwon ) 한국산업식품공학회 2012 산업 식품공학 Vol.16 No.4
본 연구에서는 2단계 발효를 통해 복분자 식초를 제조한 후 이에 대한 이화학적 성분 및 항산화 활성을 측정하였다. 복분자 식초의 알코올 발효 종료 후 알코올 함량은 11.78±0.03%이었고, 당도는 8.40±0.05 Brix이었으며, 초산발효 종료 후 알코올 함량은 0.16±0.03%이었고, 산도는 6.07±0.11%이었다. 복분자 식초의 주요 유기산은 acetic acid(4,641.59 mg%)와 citric acid(1,241.05 mg%)이었고, 복분자 식초의 총 폴리페놀, 총 플라보노이드 함량은 각각 38.01 mg/g, 17.91 mg/g이었다. 페놀화합물 중 ellagic acid 함량이 1,127.43ug/g으로 가장 많았으며, gallic acid의 함량은 962.44ug/g을 보였다. 복분자 식초의 DPPH 라디칼소거 활성과 환원력은 500ug/mL 농도에서 각각 60.3%, 0.50이었다. This study was performed to investigate the physicochemical properties and antioxidant activity of bokbunja (Black raspberry) vinegar by two step fermentation. The bokbunja vinegar was contained the highest amount of acetic acid (4,641.59 mg%) followed by citric acid (1,241.05 mg%) among the major organic acids in the vinegar. The total polyphenol and flavonoid contents in bokbunja vinegar were 38.0 mg/g and 17.8 mg/g, respectively. The ellagic acid and gallic acid contents in bokbunja vinegar were 1,127.43ug/g and 962.44ug/g, respectively. At concentration of 500ug/mL bokbunja vinegar, the DPPH radical scavenging activity and reducing power were 60.3% and 0.50, respectively.
DSM을 활용한 도입단계에서의 BIM 설계 관리 프로세스
박문서(Park, Moon-Seo),조주연(Cho, Joo-Youn),이현수(Lee, Hyun-Soo),권성근(Kwon, Sung-Keun),안승준(Ahn, Seung-Jun) 대한건축학회 2012 대한건축학회논문집 Vol.28 No.1
The BIM(Building Information Modeling) is getting special attention as a method of improving operation efficiency. However, few designers can deal with BIM and design a building at the same time. Recently, regarding the utilization of BIM designers and external modellers work together and modellers‘ modelings follow the work of the designers. lt creates confusion of the works and requires reworks. Therefore, it needs development of the design process focused on the flow of information reflecting the reality. The purpose of this study is to analyze the BIM design process at the introduction phase and find out the improvement of the BIM design process by using the Dependency Structure Matrix(DSM).
광섬유-탐침과 근적외선(NIR) 분광기를 이용한 약제분말 유동층 혼합공정의 인라인 모니터링 연구
박초롱 ( Cho Rong Park ),김아영 ( Ah Young Kim ),이민정 ( Min Jeong Lee ),이혜은 ( Hea Eun Lee ),서다영 ( Da Young Seo ),신상문 ( Sang Mun Shin ),최용선 ( Yong Sun Choi ),권병수 ( Byung Soo Kwon ),방규호 ( Kyu Ho Bang ),강호경 ( H 한국약제학회 2009 Journal of Pharmaceutical Investigation Vol.39 No.1
교통사고 환자 35예에 대한 한방의료 서비스 만족도 조사
박단서 ( Darn Seo Park ),필감흔 ( Chien Hsin Pi ),이정한 ( Jeong Han Lee ),공재철 ( Jae Cheol Kon ),백동기 ( Dong Gi Baek ),송용선 ( Yung Sun Song ),권영미 ( Young Mi Kwon ) 한방재활의학과학회 2008 한방재활의학과학회지 Vol.18 No.3
Objectives : This study aimed to understand the satisfaction degree of patients due to traffic accident(TA) in order to provide basic data which would give help not only to improve the quality of services, but also to strengthen the competitiveness of oriental medical hospitals on sequela of TA patients. Methods : The data were collected from inpatients and outpatients who answered a self-report questionnaire. Independent t-test, analysis of variance(ANOVA), X2-test, correlation analysis were used for data analysis. Results : According to the research on medical satisfaction degree, the overall satisfaction degree was 4.141. On each field, satisfaction degree related to the doctor service recorded the highest degree among others(4.474). Satisfaction degree related to the appropriateness of service was the second(4.091). On the other hand, satisfaction degree of using procedure was the lowest degree(3.857). On the difference of degrees of satisfaction by general characteristics, patients who were unemployed·houseworker group showed lower doctor service satisfaction degree than that of other groups. However, on the difference of degrees of satisfaction related to other general characteristics, there were no signigicant differences(p<0.05). Conclusions : The service distribution of oriental medical hospital was almost equal without concentrating on specified social classes.
박재서,홍권의,호광춘,Park, Jai-Seo,Hong, Kwon-Eui,Ho, Kwang-Chun 한국전기전자학회 2001 전기전자학회논문지 Vol.5 No.2
모드 전송선로 이론(MTLT: Modal Transmission-Line Theory)을 사용하여 방향성 결합기로 구성된 광 파장 필터를 설계하고 그 특성을 정확히 분석하였다. 전형적인 평면 구조형 결합기가 협대역 필터를 구현하기 위하여 이용되었으며, 테이퍼형 방향성 결합기가 광대역 필터를 구현하기 위하여 채택되었다. 협대역 필터의 경우 TE/TM 모드는 ${\lambda}=1.303{\mu}m$와 $1.1496{\mu}m$에서 최대 결합효율을 나타냈으며, 그 대역폭은 각각 30nm와 10nm로 나타났다. 더욱이, ${\lambda}=1.55{\mu}m$에서 동작하는 광대역 필터의 경우 TE/TM모드의 결합길이를 $183{\mu}m$와 $178{\mu}m$로 선택하였을 때 각각 저지대역(stop-band)과 통과대역(pass-band) 필터특성을 나타내었다. Optical wavelength filters based on directional couplers are rigorously designed and analyzed by Modal Transmission-Line Theory (MTLT). The conventional parallel directional coupler is utilized to implement a narrow-band filter, and it takes up the coupler with tapered structure as a wide-band filter. The power transfers of TE/TM modes in narrow-band filters are maximized at ${\lambda}=1.303{\mu}m\;and\;1.1496{\mu}m$, and the optical bandwidths are then 30nm and 10nm, respectively. Furthermore, when the coupling lengths of TE/TM modes in wide-band filters operating at ${\lambda}=1.55{\mu}m$ are selected as $183{\mu}m\;and\;178{\mu}m$, those are operated as the stop-band and pass-band filters, respectively.