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마이크로파 흡수 메타구조체 충진성형에 관한 실험적 연구
한준세(J.S.Han),박현진(H.J.Park),정지영(J.-Y.Jeong),정준교(J.Jung),곽은지(E.-J.Gwak),전은채(E.-c.Jeon),신종화(J.H.Shin),제태진(T.-J.Je),최두선(D.-S.Choi) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Conductive ink filling process was experimentally developed and optimized for fabrication of ultra-andwidth microwave absorbing meta-structure. Developed overall fabrication process consists of mechanical machining, polymer replication, and ink filling process. Effects of ink-fill parameters including blade type, ink viscosity, pattern depth, and blade speed were experimentally characterized to achieve uniformly filled flexible double square loop array. Under optimizing processing conditions, large-scale flexible film type meta-structure fabrication process was established.
이상민,정지영,한용태,박해택,박흠대,정길생,이기영,Lee, S.M.,Jung, J.Y.,Han, Y.T.,Park, H.T.,Park, H.D.,Chung, K.S.,Lee, K.Y. 대한생식의학회 1998 Clinical and Experimental Reproductive Medicine Vol.25 No.2
We demonstrated that the normal pregnancy and delivery by round spermatid injection (ROSI) into oocytes was achieved from nonobstructive azoospermia patient. In this case, the normal fertilization rate was 50%. All of the two pronuclear stage embryos cleaved and were transferred to the patient's uterus. A singleton pregnancy was achieved and resulted in the birth of normal female infant. This resuJt show that intracytoplasraic injection of round spermatid seems to be new treatment of nonobstmctive azoospermia male infertility. Further research is needed to evaluate the required culture conditions to induce progression of the round spermatid into a more elongated stage.
녹차섭취와 운동에 의한 비만 청소년의 혈중 biochemical marker 함량 감소
Jae K. Yang(양재경),Ji Y. Jung(정지영),Seol J. Kang(강설중),Gang W. Cheong(정강원),Jong C. Kim(김종철),Seong K. Ko(고성경),So B. Jeong(정소봉) 한국생명과학회 2011 생명과학회지 Vol.21 No.2
녹차섭취와 유산소운동이 비만 남자중학생의 체중과 혈중 biochemical marker에 미치는 영향에 관하여 연구하였다. 체지방율이 25% 이상인 비만 남자중학생 36명을 대상으로 대조군(n=9), 녹차처리군(n=9), 운동군(n=9)과 녹차와 운동 병행군(n=9)으로 분류하여, 운동은 주 5회 60분씩 12주간 실시하였고, 녹차는 녹차열수출물을 음용(녹차건중 1.5-1.7 g/일) 하였다. 대조군은 녹차처리군이 섭취한 양의 물을 섭취하였다. 실험 시작전과 12주 후의 혈중 TNF-α, IL-6, leptin, TG 및 HDL-C 함량을 측정하였다. 대조군을 포함한 모든 처리군에서 체중 변화는 없었으나 병행군은 복부지방률이 감소하였다. 대조처리는 TNF-α, IL-6 및 leptin 함량에 아무런 영향을 미치지 않았다. 녹차처리는 leptin (p<0.05)을 감소시켰고, TG (p<0.01)는 증가시켰다. 운동은 TNF-α (p<0.05), IL-6 (p<0.01) 및 leptin (p<0.05) 함량을 감소시켰다. 또한 녹차처리와 운동 병행은 IL-6 (p<0.05), leptin (p<0.05) 및 HDL-C(p<0.01) 함량을 감소시켰다. 이 결과는 녹차섭취나 운동은 젊은 비만 중학생의 혈중 염증 cytokine인 TNF-α, IL-6 및 leptin 함량 감소에 효과가 있었으나, 녹차섭취와 운동의 병행에 의한 synergy 효과는 없었다. The effects of green tea consumption and/or exercise for 12weeks on body weight and select biochemical markers in plasma were evaluated in obese adolescents with a fat ratio of greater than 25%. The subjects were randomly divided into a control group (n=9), green tea consumption group (n=9), exercise group (n=9) and green tea consumption with exercise group (n=9). Subjects in both green tea consumption group and green tea consumption with exercise group were given more than five cups of green tea extract in hot water (90℃) daily, equivalent to 1.5-1.7 g dry green tea, for 12 weeks. Subjects in both the exercise group and green tea consumption with exercise group participated in a training program (HRmax 60-70%, 60 min/day) for 12 weeks. Control subjects were only given water equal to the quantity of green tea being given to the subjects of green tea consumption. No significant changes body weights were seen in any of these treatments, but the waist to hip ratio was reduced with treatments of both green tea and exercise. The control group showed no significant changes in TNF-α, IL-6 and leptin levels. Green tea consumption reduced leptin (p<0.05), TNF-α, and leptin levels. Exercise lowered TNF-α (p<0.05), IL-6 (p<0.01), and leptin (p<0.05) concentrations. Meanwhile, a combination of green tea consumption and exercise lowered TNF-α, IL-6 (p<0.05) and leptin (p<0.05) levels. These results indicate that green tea consumption and exercise both had a positive effect on the reduction of inflammatory cytokines, TNF-α, IL-6 and leptin, in obese adolescents, but no synergistic effect on the reduction of these cytokines.
초소형 초음파 선형 모터의 조립 자동화를 위한 지능형 민첩 생산시스템
김원(W. Kim),강희석(H.S. Kang),조영준(Y.J. Cho),이규봉(G.B. Lee),정지영(J.Y. Jung),서일홍(I.H. Suh) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
This article deals the development of Agile and Intelligent Manufacturing System(AIM) for the assembly automation of a tiny ultrasonic actuator used in camera phones and PDAs. The system consists of multi-vision modules, end-effectors, a standard base frame, dispensers, jigs and modular manipulators. Subsystems are a vision system, a force control system and a virtual reality system. Experimental results show that the assembly process for the small components in the various IT applications can be realized by the AIM system.
지평식(P. S. Ji),한운동(W. D. Han),임지혜(J. H. Lim),박은규(E. K. Park),정지영(J. Y. Jung),김기범(K. B. Kim) 한국조명·전기설비학회 2009 한국조명·전기설비학회 학술대회논문집 Vol.2009 No.5월
Earth parameters are essential to design and analysis of earth In this study, a algorithm to estimate earth parameter using artificial neural network(ANN) was proposed. Structures of the soil are grouped by using KSOM algorithm before estimation. Earth parameter is obtained by using BP algorithm. The effectiveness of the proposed algorithm was verified in the case study.