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유산균 생산 후 폐기되는 부산물 첨가 사료의 급이가 잉어(Cyprinus carpio)의 성장률, 선천성 면역, 면역연관 유전자 발현 및 항균효과에 미치는 영향
최재혁,정상목,양은총,장태원,이찬흔,박관하,최상훈,Choi, Jae Hyeok,Jung, Sang Mok,Yang, Eun Chong,Jang, Tae Won,Lee, Chan Heun,Park, Kwan Ha,Choi, Sanghoon 한국어병학회 2022 한국어병학회지 Vol.35 No.1
This study has been performed to investigate the potential effects of by-product discarded after probiotics production (BPPP) on growth performance, immune gene expression, innate-immunity status, and disease resistance of carp, Cyprinus carpio. For 3 weeks, carp were fed four diets containing different levels of BPPP at 0, 0.1, 0.2 and 0.5% per kg of normal diet. Every 7 days of feeding, immune-related gene expression, serum lysozyme activity and ACH<sub>50</sub> were analyzed. Growth rates and challenge test with E. tarda were conducted after 3 weeks of BPPP feeding. Both lysozyme activity and ACH<sub>50</sub> were significantly (p<0.05) increased in all BPPP supplemented groups compared to the control at every 7 day for 3 weeks of feeding trial. The gene expression of pro-inflammatory cytokines, IL-1β and TNF-α was significantly (p<0.05) up-regulated until 21 days of feeding in all groups except for 0.2% group on day 7 post feeding. The anti-inflammatory cytokine IL-10 gene expression was only significantly (p<0.05) increased in 0.1% group on day 7 and decreased (p<0.05) on day 14 in all BPPP supplemented groups. On day 21, the IL-10 gene expression was augmented (p<0.05) in all groups. SOD gene expression was significantly (p<0.05) increased compared to the control on day 14 and 21 post feeding, whereas no significant difference was observed on day 7. In challenging test, 0.2%, 0.1%, 0.5% and control group showed 80%, 70%, 60% and 40% of survival rate, respectively. Feed conversion rate was only improved in 0.5% group. In conclusion, the present study indicates that dietary BPPP suplementation improved growth performance, innate immune response and bactericidal activity in carp.
레고 마인드스톰 로봇을 활용한 STEAM 교육 프로그램 개발 및 적용
최재혁 ( Jae-hyeok Choi ),최호명 ( Ho-meoyng Choi ),박종석 ( Jongseok Park ) 경북대학교 과학교육연구소 2018 科學敎育硏究誌 Vol.42 No.1
과학, 기술, 공학, 예술, 그리고 수학을 통합한 STEAM 프로그램은 중등 교육에서 필수적인 요소로 자리 잡았고 소프트웨어 교육은 앞으로 중등학교에서 필수 이수과목으로 선정될 예정이다. 본 연구에서는 STEAM 교육과 함께 소프트웨어 교육 자료로 레고 마인드스톰 로봇 활용방안을 제안하고자 한다. 5차시로 개발된 STEAM 교육 프로그램은 차시별로 STEAM 교육에서의 핵심적인 요소를 포함하여 문제해결중심으로 구성되었고, 이를 수업에 적용하여 사례를 분석하였다. 분석 결과 레고 로봇을 활용한 STEAM 프로그램은 학생들에게 창의적인 사고와 문제해결 방법에 대해 구상 할 수 있는 기회를 제공하고 소프트웨어 교육과 과학 수업에의 활용 가능성에 대해 긍정적인 결과를 보였다. 또한 본 연구에서 개발한 프로그램은 방과 후 수업, 영재수업 등 현장에 적용 가능함을 알 수 있었다. STEAM program as integrating Science, Technology, Engineering, Arts, and Mathematics became essential part of secondary education and software education will be a required subject in secondary schools. In this study, we propose the application of the Lego mindstorms robotics programs for the developments of both STEAM and software educational materials. Our program consisting of five hours of classes is made based on the problem solving strategies. According to students’ impression obtained after our program had been applied, our program appears to provide students opportunities for conceiving creative thinking and problem solving strategies. It also shows positive results for the application to the software and science educations as well as other extracurricular such as after school programs or programs for gifted students.
최재혁(Jae Hyeok Choi),문병연(Byeong-Yeon Moon),유동식(Dong-Sik Yu),조현국(Hyun Gug Cho),김상엽(Sang-Yeob Kim) 한국안광학회 2018 한국안광학회지 Vol.23 No.3
Purpose: To investigate the effects of induced refractive errors on gait patterns. Methods: Three-two subjects of average age 22.50±2.22 years were participated in this study. To induce binocular myopia and hyperopia, spherical lenses of ±0.50 D, ±1.00 D, ±2.00 D, ±3.00 D, ±4.00 D, and ±5.00 D were used. Gait patterns (step length and cadence) were measured on a treadmill at a speed 4 km/h, upper-body sway was also evaluated using motion sensor during gait. After each repeated measurements in refractive errors, the measurement values measured in the full corrected condition were compared with those measured. Results: The step length was significantly shortened and cadence was significantly increased from myopia of –1.00 D compared to the full corrected condition. The area of upper-body sway was extended to the anterior-posterior and left-right position compared with the full correction condition during gait, while myopic and hyperopic refractive errors were induced. Conclusions: Uncorrected myopic refraction error above –1.00 D was a factor for changing the gait pattern during gait.
최재혁 ( Choi Jae-hyeok ),정진섭 ( Jung Jin Sup ) 충북대학교 산업경영연구소 2018 産業과 經營 Vol.31 No.1
This paper focuses on artificial intelligence, the Internet of Things, cyber-reality convergence (e.g., CPS), industry 4.0, and intelligent information society, which are key words of the 4th industrial revolution, and will create competitiveness in the changing industrial ecosystem. In particular, through the case of the UlalaLABs, Inc., which supports SMEs with smart factory platform services that combine manufacturing and information and communication technologies (ICTs) in the 4th industrial revolution, this paper will examine the recent 4th Industrial Revolution and the competitiveness of small and medium manufacturers. In this study, Porter's diamond model was used to analyze the industrial competitiveness of smart factory. Through the success stories and strategies of UlalaLABs, Inc. under the 4th industrial revolution, we presented the strategic implications such as the direction of domestic SME venture companies and various utilization of Smart Factory.