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탄소원 종류에 따른 환경친화성 생물소재인 세균 섬유소의 생산 및 특성
박성진,최승훈,박민주,이오미,손홍주,Park, SungJin,Choi, Seunghoon,Park, MinJoo,Lee, O-Mi,Son, Hong-Joo 한국환경과학회 2020 한국환경과학회지 Vol.29 No.8
Production of Bacterial Cellulose (BC) by Gluconacetobacter sp. A5 was studied in shaken culture using different cost-effective carbon sources and its structural and mechanical properties were evaluated. Glycerol showed the highest level (7.26 g/l) of BC production, which was about three times higher than the yield in glucose medium. BC production depended not only on the decrease in pH, but also on the ability of Gluconacetobacter sp. A5 to synthesize glucose from different carbon sources and then polymerize it into BC. All BC produced from different carbon sources exhibited a three-dimensional reticulated structure consisting of ultrafine cellulose fibriles. Carbon sources did not significantly change the microfibrile structure of the resulting BC. BC produced from glucose medium had the lowest water-holding capacity, while BC from molasses medium had the highest. XRD data revealed that all BC were cellulose type I, the same as typical native cellulose. The crystalline strength of BC produced in glucose medium was the highest, and that in molasses medium was the lowest. Our results suggest that glycerol could be a potential low-cost substrate for BC production, leading to the reduction in the production cost, and also to produce BC with different mechanical properties by selecting appropriate carbon source.
기업가정신 교육을 위한 온라인 게이미피케이션 콘텐츠 개발 및 검증
박성진(Sungjin Park),이유정(Yujung Lee),인재현(Jaehyun In) 한국디지털콘텐츠학회 2021 한국디지털콘텐츠학회논문지 Vol.22 No.2
Gamification is studied as an effective online learning method in COVID-19. The purpose of this study is to develop online gamified learning contents and to verify educational effectiveness. For the study, this study develop online gamified learning contents for entrepreneurship. 85 of high school student recruite to verify the developed contents. The results show that the developed gamified learning contents have a positive effect on interst, self-efficacy, motivation, cooperartion and communication. Based on the results, this study suggest that the possibility of online learning contents and necessity of online gamified learning contents development methodology.
무선 인터넷 환경에서 적외선 수신용 정보가전기기 제어를 위한 홈 서버 및 이동단말의 설계
박성진(Sungjin Park),윤지영(Jiyoung Yoon),김창연(Changyeun Kim),변태영(Taeyoung Byun) 한국정보과학회 2005 한국정보과학회 학술발표논문집 Vol.32 No.2
현재 홈 네트워크 구축에 대한 관심이 깊어지고 있는 시점에서 대부분의 가정용 정보가전기기들을 적외선 송신용 리모컨을 이용하여 정보가전기기의 제어가 가능하다. 본 논문에서는 이러한 현재의 상황을 고려하여, 비교적 저렴하게 기존의 정보가전기기들을 원격으로 제어하고 감시할 수 있는 홈 서버 및 이동단말을 구현하기 위한 주요 설계 내용을 기술한다. 이를 위해 홈 서버 및 단말용 주요 기능 모듈 및 자료구조를 설계하였다. 또한 정보가전기기를 제어하기 위한 기기 및 모델별 적외선 제어코드를 포함하는 자료구조를 설계하였다, 이러한 설계 내용은 무선인터넷을 기반으로 하는 이동단말기를 활용하여 가정 외에서 언제든지 정보가전기기를 제어할 수 있는 홈 서버 및 이동단말용 소프트웨어의 구현에 직접 적용할 수 있다.
대한민국 군인의 신경계 질환의 역학적 동향에 대한 연구
박성진 ( Sungjin Park ) 국군의무사령부 2018 대한군진의학학술지 Vol.49 No.1
Objectives; This study was performed to evaluate the current status of neurological disorders in soldiers of Republic of Korea. Methods; The neurological disorders treated in outpatient clinics of 14 Republic of Korea Armed Forces hospitals in the period from 2013 to 2017 were retrospectively analyzed. Results; The total number of visiting outpatient clinic due to neurological disorders was 69,547. Headache was the most common disorder(44.1%). The number of patients treated with migraine and abnormal involuntary movement were annually increased(Ptrend = 0.014, both), and in addition, the proportion of the two disorders were also annually increased from 2.5% in 2013 to 7.1% in 2017 for migraine and 0.6% in 2013 to 1.5% in 2017 for abnormal involuntary movement(Ptrend of percent change = 0.014 and 0.023, respectively). Dizziness(8.1%), syncope and collapse(4.5%), and mono-neuropathy(2.9%) were also common disorders. The distribution of neurological disorders was not significantly different between militaryㆍair-force hospitals and naval hospitals, as well as between naval hospitals. Conclusion; This is the first report presenting the current status of neurological disorders in soldiers of Republic of Korea. Further policies are needed to be considered for the better management of the neurological disorders.