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임플란트 식립 환자에서 혈소판 풍부혈장의 임상적 응용 사례보고
조원배,오현주 한국보건의료기술평가학회 2014 보건의료기술평가 Vol.2 No.1
Platelet-rich plasma is an autologous source of platelet-derived growth factor and transforming growth factor that is obtained from sequestering and concentrating platelets by gradient density centrifugation. We have used platelet-rich plasma to evaluate the clinical usefulness for induction of periodontal regeneration in two patients with bone graft at implant surgery, sinus lift procedure, and cyst enucleation. To evaluate the clinical effectiveness, 13 days or 15 day later from bone graft by individuals, histogenetical and cosmetic improvement were evaluated. Patients also were asked about any subjective improvements. As the results, we could observe the histogenetical and cosmetic improvement during treatment, and all cases were good healing and clinical success
석유화학 플랜트용 프로세스 펌프의 국산화율 제고 방안에 관한 연구
조원배,문승재,유호선,Cho, Won-Bae,Moon, Seung-Jae,Yoo, Hoseon 한국플랜트학회 2009 플랜트 저널 Vol.5 No.3
In this paper, the present condition for localization of process pumps and the enhancement method of the localization ratio of process pumps for refinery and chemical plant market were studied. The market of plant industry in the world has grown rapidly since 2000. However, the profit of domestic plant EPC compaies cound not have been increased as much as the market scale because they procured most of equipment from overseas. To make remarkable profit of plant EPC companies in the petrochemical industry, localization of equipments is required. Suitable equipment for localization is process pump applied API 610 standard. An purchased amount of pumps from overseas by domestic plant EPC companies in the last two years were 230 billion won. If process pumps are localized then an profit of plant EPC project will increase.
Femtosecond Mid-IR Cr:ZnS Laser with Transmitting Graphene-ZnSe Saturable Absorber
조원배,배지은,이승철,명노성,이상민 한국광학회 2023 Current Optics and Photonics Vol.7 No.6
Graphene-based saturable absorbers (SAs) are widely used as laser mode-lockers at various laser oscillators. In particular, transmission-type graphene-SAs with ultrabroad spectral coverage are typically manufactured on transparent substrates with low nonlinearity to minimize the effects on the oscillators. Here, we developed two types of transmitting graphene SAs based on CaF 2 and ZnSe. Using the graphene-SA based on CaF 2 , a passively mode-locked mid-infrared Cr:ZnS laser delivers relatively long 540 fs pulses with a maximum output power of up to 760 mW. In the negative net cavity dispersion regime, the pulse width was not reduced further by inhomogeneous group delay dispersion (GDD) compensation. In the same laser cavity, we replaced only the graphene-SA based on CaF 2 with the SA based on ZnSe. Due to the additional self-phase modulation effect induced by the ZnSe substrate with high nonlinearity, the stably mode-locked Cr:ZnS laser produced Fourier transform-limited ~130 fs near 2,340 nm. In the stable single-pulse operation regime, average output powers up to 635 mW at 234 MHz repetition rates were achieved. To our knowledge, this is the first attempt to achieve shorter pulse widths from a polycrystalline Cr:ZnS laser by utilizing the graphene deposited on the substrate with high nonlinearity.