http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
중심장액맥락망막병증 환자에서 유리체강내 베바시주맙 주입술의 치료 효과에 영향을 주는 요인
권의용,Eui Yong Kweon 대한안과학회 2014 대한안과학회지 Vol.55 No.3
Purpose: To evaluate the factors influencing the effect of the intravitreal bevacizumab injection in patients with central serous chorioretinopathy. Methods: We performed a retrospective review of the medical records of 54 patients (56 eyes) who had been symptomatic for more than 3 months with central serous chorioretinopathy (CSC), who had undergone intravitreal bevacizumab injection and been on regular follow-up for at least 6 months. Results: Responders were 34 eyes (60.7%) and non-responders were 22 eyes (39.3%). The leaking points of the non-responder group were multiple and located more centrally than that of the responder group on fluorescein angiography (FA) (p = 0.01, p = 0.044). In addition, non-responder group showed cystoid macular edema on optical coherence tomography (OCT) as compared with responder group (p = 0.042). Conclusions: CSC with multiple, centrally located leaks on FA or cystoid macular edema on OCT was ineffective or recurrent with intravitreal bevacizumab injection. J Korean Ophthalmol Soc 2014;55(3):391-395
맥락막 모반의 스펙트럼영역 빛간섭단층촬영 소견: 초음파 소견과의 비교 연구
권의용,Eui Yong Kweon,MD 대한안과학회 2014 대한안과학회지 Vol.55 No.3
Purpose: To evaluate the characteristics of choroidal nevus using the enhanced depth imaging spectral domain optical coherence tomography (EDI SD-OCT), with a comparison to the B scan ultrasound (BUS) findings. Methods: Medical records of 124 eyes of 124 choroidal nevus patients were reviewed retrospectively. All patients underwent fundus photography (FP), EDI SD-OCT, and BUS. Results: Of 124 eyes with choroidal nevus examined by EDI SD-OCT, 43 eyes (35%) displayed good images to study. The most common EDI-OCT imaging features included choroidal shadowing, choriocapillary thinning, retinal pigment epithelial changes, and overlying subretinal fluid. The mean nevus thickness was 817 μm (120-1850 μm) by EDI-OCT compared 1295 μm (780-2400 μm) by BUS. The mean difference in the tumor thickness between two techniques was 475 μm (27-1319 μm) (p < 0.05). Conclusions: These results have suggested that imaging of choroidal nevus with EDI-OCT shows superior measurement of its characteristics compared with ultrasonography. The clinical utility of this modality is emerging. EDI-OCT is useful in distinguishing suspicious nevi from other chorioretinal lesions, detecting tumor re-growth along the treatment margin, and demonstrating retinal or choroid tumor location. J Korean Ophthalmol Soc 2014;55(3):387-390
Periodic Inspection of a Random Shock Model
Lee, Eui Yong,Lee, Jiyeon,Sohn, Joong Kweon The Korean Society for Quality Management 1996 품질경영학회지 Vol.24 No.3
A Markovian stochastic model for a system subject to random shocks is considered. Each shock arriving according to a Poisson process decreases the state of the system by a random amount. A repairman arrives at the system periodically for inspection and repairs the system only if the state is below a threshold. Costs are assigned to each inspection of the repairman, to each repair, and to the system being in bad states below the threshold. The expected long run average cost is obtained and compared with that of the random inspection introduced by Lee and Lee(1994).
강산 및 강알칼리 음독에서 냉각 용액을 사용한 희석 요법과 중화 요법의 가능성
이중의,송형곤,김동훈,권운용,곽영호,서길준,윤여규 대한응급의학회 2001 대한응급의학회지 Vol.12 No.3
Background: There is no effective treatment modality for caustic agent ingestion. Dilution and neutralization are prohibited because of the risk of secondary thermal injury. This experiment is designed to evaluate the amount of dilution and neutralization heat and to gauge the applicability of dilution and neutralization therapy using cold solutions to suppress the peak temperature. Methods: This is an in-vitro chemical experiment. HCl, CH3COOH, NaOH, and NH4OH are selected as representatives of strong and weak acids and strong and weak alkali, respectively. 20℃, 11.6M, 5.8M, and 2.9M solutions of each acid and alkali are made and mixed using a magnetic stirrer at a room air temperature of 28℃. The peak temperature, the duration above 40℃, and the heat amount are measured or calculated. Results: When a 11.6M HCl or NaOH solution is diluted with same amount of water, 32 or 18cal. per mL of HCl or NaOH is produced, respectively. HCl produces a significant peak temperature, but NaOH does not. The lower the concentration, the lower the amount of heat production. 11.6M CH3COOH and NH4OH solutions don't produce dilution heat.11.6M and 5.8M solutions of all acids and alkali produce destructive neutralization heat. However, 2.9M solutions produce neutralization heat which might be controllable. When a 11.6M HCl or NaOH solution is neutralized with a -10℃ 2.9 M NaOH or HCl solution, respectively, the peak temperature produced is below 40℃ and seems to add little thermal damage to viable tissue. Conclusion: Dilution and neutralization with a cold solution in cases of strong acid or alkali ingestion is a promising method to avoid thermal injury.
Hong, Min-Eui,Lee, Ki-Sung,Yu, Byung Jo,Sung, Young-Je,Park, Sung Min,Koo, Hyun Min,Kweon, Dae-Hyuk,Park, Jae Chan,Jin, Yong-Su Elsevier 2010 Journal of biotechnology Vol.149 No.1
<P><B>Abstract</B></P><P>The economic production of biofuels from renewable biomass using <I>Saccharomyces cerevisiae</I> requires tolerance to high concentrations of sugar and alcohol. Here we applied an inverse metabolic engineering approach to identify endogenous gene targets conferring improved alcohol tolerance in <I>S. cerevisiae</I>. After transformation with a <I>S. cerevisiae</I> genomic library, enrichment of the transformants exhibiting improved tolerance was performed by serial subculture in the presence of iso-butanol (1%). Through sequence analysis of the isolated plasmids from the selected transformants, four endogenous <I>S. cerevisiae</I> genes were identified as overexpression targets eliciting improved tolerance to both iso-butanol and ethanol. Overexpression of <I>INO1</I>, <I>DOG1</I>, <I>HAL1</I> or a truncated form of <I>MSN2</I> resulted in remarkably increased tolerance to high concentrations of iso-butanol and ethanol. Overexpression of <I>INO1</I> elicited the highest ethanol tolerance, resulting in higher titers and volumetric productivities in the fermentation experiments performed with high glucose concentrations. In addition, the <I>INO1</I>-overexpressing strain showed a threefold increase in the specific growth rate as compared to that of the control strain under conditions of high levels of glucose (10%) and ethanol (5%). Although alcohol tolerance in yeast is a complex trait affected by simultaneous interactions of many genes, our results using a genomic library reveal potential target genes for better understanding and possible engineering of metabolic pathways underlying alcohol tolerance phenotypes.</P>
Sang-Hyun Oh,Eui-Seong Hwang,Eun-Seok Choi,Gyu-Dong Park,Jin-Gu Kim,Jin-Yong Seong,Jun-Hee Cho,Keun-Do Ban,Keun-Hwan Noh,Nam-Kyeong Kim,Seaung-Suk Lee,Seok-Won Lee,Seung-Jin Yeom,Soon-Yong Kweon,Suk-K 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.IV
We have investigated the ferroelectric properties of integrated Pt/SrBi2Ta2O9 (SBT)/Pt capacitors with capacitor-level dielectric of boron phosphosilicate glass (BPSG). A signicant reduction of remanent polarization (P-P^) was observed in the SBT capacitor as covered with BPSG lm and the polarization decay depended strongly on top electorde size. Detailed analyses showed the degradation resulted from bismuth loss in the surface region of SBT, which is closely related with the impurites diused from BPSG into SBT layer. The degradation of Pt/SBT/Pt ferroelectric capacitor was successfully prevented by inserting SiO2 layer as a impurity blocking layer between the SBT and the BPSG. Thereby device performances of SBT-based ferroelectric memory were also considerably improved.
Enhancement of the anisotropic photocurrent in ferroelectric oxides by strain gradients
Chu, Kanghyun,Jang, Byung-Kweon,Sung, Ji Ho,Shin, Yoon Ah,Lee, Eui-Sup,Song, Kyung,Lee, Jin Hong,Woo, Chang-Su,Kim, Seung Jin,Choi, Si-Young,Koo, Tae Yeong,Kim, Yong-Hyun,Oh, Sang-Ho,Jo, Moon-Ho,Yang, Nature Publishing Group 2015 Nature nanotechnology Vol.10 No.11
The phase separation of multiple competing structural/ferroelectric phases has attracted particular attention owing to its excellent electromechanical properties. Little is known, however, about the strain-gradient-induced electronic phenomena at the interface of competing structural phases. Here, we investigate the polymorphic phase interface of bismuth ferrites using spatially resolved photocurrent measurements, present the observation of a large enhancement of the anisotropic interfacial photocurrent by two orders of magnitude, and discuss the possible mechanism on the basis of the flexoelectric effect. Nanoscale characterizations of the photosensitive area through position-sensitive angle-resolved piezoresponse force microscopy and electron holography techniques, in conjunction with phase field simulation, reveal that regularly ordered dipole-charged domain walls emerge. These findings offer practical implications for complex oxide optoelectronics.