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송영진,이준하,Song, Young-Jin,Lee, Jun-Ha 한국반도체디스플레이기술학회 2010 반도체디스플레이기술학회지 Vol.9 No.1
We investigated a linear carbon nanotube motor serving as the key building block for nano-scale motion control by using molecular dynamics simulations. This linear nano-motor, is based on the electrostatically telescoping multi-walled carbon-nanotube with ultralow intershell sliding friction, is controlled by the gate potential with the capacitance feedback sensing. The resonant harmonic peaks are induced by the interference between the driving frequencies and its self-frequency. The temperature is very important factor to operate this nanomotor.
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송영진,Song, Young-Jin 한국반도체디스플레이기술학회 2007 반도체디스플레이기술학회지 Vol.6 No.4
Carbon nanotube oscillators encapsulating copper nanowire were investigated by molecular dynamics simulations. The excess forces due to the carbon-carbon van der Waals interactions are higher than the excess force due to carbon-copper interactions. And the masses of copper atoms are higher than those of carbon atoms. So, the carbon atoms are easier accelerated than the copper atoms. When the encapsulated copper nanowire deforms the encapsulating nanotube, the frequency can not be estimated by the mass-frequency dependence in classical oscillation theory.
송영진,정승일,권지원,Young Jin Song,Seung Il Jung,Ji Won Kwon 대한안과학회 2014 대한안과학회지 Vol.55 No.11
Purpose: To report a case of a patient who developed scleromalacia after cosmetic eye whitening conjunctivectomy and treated with scleral and conjunctival autograft. Case summary: A 42-year-old male patient who received cosmetic eye whitening conjunctivectomy in both eyes on the nasal side in 2008 developed scleromalacia in the left eye. Calcium deposits and deformed conjunctiva were removed from the left eye. Autogenous sclera and conjunctiva were obtained from the upper side of the left eye and autogenous graft was performed. Topical antibiotics, topical steroid, topical autologous serum, and antibiotic ointment were applied postoperatively. The patient was given oral steroid for 1 month after surgery. During the postoperative 6 months, the grafted autogenous sclera was well maintained and improved cosmetically. Conclusions: In cases of scleromalacia occurring after cosmetic eye whitening conjunctivectomy, autogenous sclera can be considered as a treatment filler. J Korean Ophthalmol Soc 2014;55(11):1706-1709
송영진,정종현,김도균,Young Jin Song,Jong Hyun Jung,Do Gyun Kim 대한안과학회 2014 대한안과학회지 Vol.55 No.12
Purpose: To investigate the relationship between the concentration of aqueous humor cytokines and the severity of diabetic retinopathy. Methods: Thirty-six subjects were included in the control, non-proliferative diabetic retinopathy (NPDR), and proliferative diabetic retinopathy (PDR) groups, each group has 12 patients. Aqueous levels of cytokines (interleukin (IL)-1α, IL-1β, IL-2, IL-4, IL-6, IL-8, IL-10, vascular endothelial growth factor (VEGF), monocyte chemoattractant protein (MCP)-1, interferon (IFN)-γ, tumor necrosis factor (TNF)-α) were investigated according to the severity of diabetic retinopathy. Results: When the control group was compared with the PDR and NPDR groups, aqueous levels of IL-6 were significantly higher in PDR patients than in those of both the control and NPDR groups (<EM>p</EM> = 0.016 and p = 0.003, respectively). The aqueous levels of VEGF were significantly higher in the eyes of PDR patients than in those of the control group (<EM>p</EM> = 0.003). There were no statistically significant differences between the 3 groups with regard to other cytokines. Conclusions: Aqueous levels of IL-6 and VEGF were higher in the eyes of PDR patients than in those of healthy controls. J Korean Ophthalmol Soc 2014;55(12):1821-1827
송영진 ( Young Jin Song ),최정식 ( Jung Sik Choi ),박수영 ( Su Young Park ),박영진 ( Young Jin Park ),안민성 ( Min Sung An ),배기범 ( Ki Beom Bae ),홍관희 ( Kwan Hee Hong ) 대한내과학회 2014 대한내과학회지 Vol.86 No.1
Colonic perforation after acute necrotizing pancreatitis is a very rare but critical complication. The mortality rate is greater than 50%. Therefore, a high index of suspicion is needed for early detection of the complication. We present a case of a 50-year-old man diagnosed as colonic perforation after acute necrotizing pancreatitis. During the treatment course, fecal material was drained via a pleural drainage tube. Colonic perforation was confirmed on CT scan. The pathogenesis of colonic perforation in this case involved direct spread of pancreatic enzymes and inflammatory exudate. He was treated successfully with colectomy, ileostomy, debridement of necrotic tissue, and drainage. (Korean J Med 2014;86:59-64)