http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Green Emitting PLED Having Polymeric Host and Dopant in Emissive Layer
Han, Yoon Soo,Kim, Hoyoung,Choi, Byeong Dae,Song, Jeong Han,Kwon, Younghwan,Hur, Youngjune,Kwak, Giseop,Kim, Soon Hak,Park, Lee Soon,Choi, Byeong-Dae TaylorFrancis 2007 Molecular Crystals and Liquid Crystals Vol.470 No.1
<P> Poly(1,1'-biphenyl-4,4'-ylene vinylene-alt-2,5-bis(2-ethylhexyl)-1,4-phenylene vinylene] [poly(BPV-alt-BEHPV)] as a polymeric dopant, was synthesized by Honer-Emmons condensation from corresponding dialdehyde and diphosphonate monomers. Synthesized alternating polymer was used to fabricate single layer (ITO/Host:Dopant/Al) PLEDs with poly(vinyl carbazole) (PVK) as a host. Conjugated poly(BPV-alt-BEHPV) showed green emission from single layer ITO/poly(BPV-alt-BEHPV)/Al device. Emission colors from doped PLEDs were changed by energy transfer from blue originated from PVK to green with increasing the content of poly(BPV-alt-BEHPV).</P>
Younghwan Son,Chang-Ki Baek,In-Shik Han,Han-Soo Joo,Tae-Gyu Goo,Ooksang Yoo,Wonho Choi,Hee-Hwan Ji,Hi-Deok Lee,Kim, D.M. IEEE 2009 IEEE TRANSACTIONS ON NANOTECHNOLOGY Vol.8 No.5
<P>This paper presents the depth profile of oxide trap density, extracted from the dual gate processed thermally grown oxide in NO ambient and remote plasma nitrided oxides by using multifrequency and multitemperature charge pumping technique in conjunction with the tunneling model of trapped charges. Nitrided oxide is widely used to improve the reliability of nanoscale MOSFETs because it can decrease the degradation of gate oxide due to the generation of traps therein. Based on the measurement, the optimum nitrogen concentration in such typical nitrided process is discussed in correlation with the gate oxide thickness for nanoscale CMOSFETs.</P>
한기환,김영환,강진성 大韓成形外科學會 1994 Archives of Plastic Surgery Vol.21 No.1
Recent data in A/J mouse and rhesus monkey indicate that a cleft lip repaired in utero heals without inflammation and scar formation typical of postnatal cleft lip repair. Authors developed a model for in utero cleft lip repair in rabbits, and examined the cleft lip nose forms and the histologic features of cleft lip healing. A cleft lip was created by a 1 mm paramedian section of the left side of the upper lip and maxillary alveolus under 6× microscopic magnification in the New Zealand albino rabbits on day 24 of gestation. The defect was simultaneously repaired with two 10-0 nylon sutures at the vermilion border and nostril sill. The same defect was created at a second febus, and the febus returned to the uterus without repair. Control fetuses were exposed and returned to the uterus without operation. Forty-five fetuses in 12 pregnant does were operated on. Twenty-eight fetuses survived the procedure and were alive at the time of harvest (1,3, and 7 days after procedure): 9/15 repaired clefts (60.0%), 10/19 unrepaired clefts (52.6% ). and 9/l1 controls (81.8% ). Clinical examination demonstrated that there was little or no evidence of the lip repair in repaired fetus. Both repaired and unrepaired fetuses had asymmetry of the nose with depression on the cleft side. However, the repaired group had a milder deformity and appeared to be improving with growth. Microscopic examination of the hematoxylin-eosin stained sections confirmed that in both repaired and unrepaired wounds, the fetal rabbit clefts heals mostly without inflammatory cell infilteration or scar formation. In the unreparied cleft, epithelization had not occurred by seven days. The results of this study demonstrate that the fetal rabbit model for cleft lip repair is feasible with acceptable survival, and cleft lip repair in the fetal rabbit heals without inflammation and by regeneration of involved tissue rather than by fibrous replacement.
Han, Yoon Soo,Kim, Hoyoung,Choi, Byeong Dae,Kwon, Younghwan,Hur, Youngjune,Kwak, Giseop,Kim, Soon Hak,Park, Lee Soon,Choi, Byeong-Dae TaylorFrancis 2007 Molecular Crystals and Liquid Crystals Vol.470 No.1
<P> A dopant, 4,4'-bis(dimethyl[4-(2-phenyl-buta-1,3-dienyl)phenyl]amine) biphenyl (BPAB), was synthesized, and single layered polymer light emitting diode (PLED)s, ITO/Host:Dopant/Al, were fabricated with blends of poly(vinyl carbazole) (PVK) as host and BPAB as dopant. The electroluminescence (EL) was observed in doped PLEDs. From the EL and photoluminescence (PL) spectra, the existence of energy transfer from host to dopant was verified. With increasing content of dopant (BPAB), blue emission originated from PVK reduced, but didn't completely disappear, suggesting inefficient energy transfer from PVK to BPAB. When the content of BPAB was 15 wt%, yellow green emission from PLED was observed due to partial energy transfer from PVK to BPAB.</P>
한기환,강진성,김영환 大韓成形外科學會 1996 Archives of Plastic Surgery Vol.23 No.2
Over seven years, we have been using a prefabricated custom made nasal implant that was made of a silicone adhesive with or without a midline silicone sheet from the life-size nasal stone model of the patient. Twenty-two proportion indices were calculated from 26 surface measurements indirectly taken from the surface of the nasal stone model in 26 preoperative patients, aged 16 to 39 years(mean 25 years). Twenty-six surface measurements based on the work of Farkas included 11 single and 6 paired lengths, 2 angles, and 1 inclination. The preoperative measurements and proportions were compared with those of postoperative. The mean follow-up period was 25 months. The analysis of the results was conducted using Wilcoxon matched-pairs signed-ranks test. The most significantly altered measurement after augmentation rhinoplasty was the lobule length (33.4%, p<0.05). The nasal root depth(31.1%), the nasal tip protrusion(21.4%), the ala length(6.3% left, 7.8% right) and half arc(5.1% left, 6.8% right), the nose length(6.5%), and the nasal root length(6.2% left, 4.6% right) were also significantly increased (p<0.05). On the contrary, the nasal root width (4.2%) and the intercanthal distance (4.2%) were significantly decreased(p<0.05). The nasofrontal angle and the nasolabial angle were increased a mean of 6.2 degrees and 3.0 degrees, respectively (p>0.05). The following can be also concluded from the altered proportion indices after augmentation rhinoplasty. The root was more augmented in relation to the width reduction ; the root revealed a more remarkable alteration than the tip; the tip was more projected in relation to the width reduction ; the tip revealed a cephalad rotation with the tip projection(retrousse) ; the lobule-tip protrusion ratio was more increased, which exhibits a harmony disruption compared with preoperative "worm's eye" view ; and the nostrils became more narrowed in relation to elongation.
한기환,김영환,최동원,송중원,강진성 大韓成形外科學會 1994 Archives of Plastic Surgery Vol.21 No.5
Over the 7 years, we have used tissue expansion technique to achieve soft tissue reconstruction in 61 patients with various kinds of congenital or acquire defects of the scalp, face, trunk, and extremities. Of these patients, 25 were male and 36 were female, ranged in age from 5 to 36 years(mean 21). Burn scar(44%) was the most common indication and the rest of them were traumatic scar, microtia, tumor, nevus, vascular malformation, paraffinoma, and cleft lip scar. Twenty five expansions were performed in the face, 12 in the scalp, 9 in the upper extremity, 7 in the ear, 5 in the neck, 4 in the lower extremity, and 1 in the trunk. Rectangular shaped prosthesis with remote internal reservoirs were most commonly used types, and the expander volume ranged from 1.5 to 1,100 mL. Every expander was prefilled to 21 percent of its volume in average and inflation was begun about 2 weeks after implantation. The process was repeated at weekly intervals until adequate tissue expansion was obtained. Expansion period ranged from 2 to 31 weeks(mean 13). Hyperexpansion(mean 130%) was a rule in this series, allowing a skin surplus for reconstruction. Clinical assessment was done with an excellent result of 37%, especially in the scalp. Twenty two percent of the patients had complications requiring specific treatment with consequent alteration of the treatment plan. The most common complication was prosthesis exposure.