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박우상 ( Woo Sang Park ),김상훈 ( Sang Hun Kim ) 한국물환경학회 2013 한국물환경학회지 Vol.29 No.4
In this study, we conducted whole effluent toxicity (WET) proficiency testing based on the results which EC50 value of 3 types (A, B, C) unknown samples calculated from 32 water quality measurement agencies in Korea. WET proficiency testing was expected to their improve of analysis skill and ensure reliability of analysis results. Ultimately, it is intended to promote the reliable enforcement of WET. WET proficiency testing was evaluated using the z-score, robust z-score and the results showed that 30 participating agencies were “compliance”. In addition, EC50 values of “unknown sample A” were the normal distribution. Therefore, “unknown sample A” was considered as the most suitable standard toxicity substance.
탈감작법으로 치료한 인형 재조합 인슐린에 대한 아나필락시스
박경우(Kyung Woo Park),박현신(Hyun Shin Park),박우상(Sang Woo Park),장철순(Chul Soon Jang),정정환(Chung Whan Chung),홍성빈(Seong Bin Hong),김용성(Yong Seong Kim),박원(Won Park),송정수(Jung Soo Song),최승원(Seung Won Choi) 대한내과학회 2002 대한내과학회지 Vol.62 No.2
N/A Allergic reaction to insulin is mediated by several mechanisms; differences in amino acid sequence of animal and human insulin, altered tertiary structure of insulin and the presence of non-insulin protein contaminants or pharmaceutical additives. Anaphylactic reactions to insulin only occur in 0.1 to 2% of patients who stopped insulin therapy and have then resumed treatment. We report a diabetic patient who suffered severe anaphylactic reactions to human recombinant insulin, successfully treated by desensitization. A 19-year-old man with type 1 diabetes receiving Insulatard HM? developed generalized urticaria and angioedema with progression to dyspnea, dizziness and syncope. Skin prick test to all kinds of human recombinant insulin products revealed immediate type hypersensitivity and the titer of insulin IgE was increased in serum. The desensitization trial with Velosulin HM? using modified desensitization method was performed. Six months after the desensitization he was taking Velosulin HM? as well as Insulatard HM? without any evidence of systemic allergic reactions.(Korean J Med 62:204-208, 2002)
액정 전계 렌즈 기반의 시청구간 전환가능 디스플레이의 광학적 해석
정신용,박우상,Jeong, Shin-Yong,Park, Woo-Sang 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.4
This paper proposes a private display that can adjust viewing angles by using an electric-field-driven (EFD) LC Lens. The EFD LC Lens design and simulation were analyzed by using the Extended Jones Matrix Method. The conventional method for attaching a private film to the display was difficult. In order to solve this problem, in this study, by using the EFD LC Lens, we devised a method that can view images more conveniently. We analyzed the luminance and illumination of the optical viewing distance by using the Extended Jones Matrix Method. We also measured the intensity of the viewing angles. The simulation attached the EFD LC Lens to the 14" Full HD RGB stripe wide panel. We calculated the relative luminance distribution and the luminance distribution on the viewing angle of the image at the optimum viewing distance of 60 cm, using the EFD LC Lens and the lenticular lens. The proposed method could be used to design private displays that can adjust the viewing angle of the EFD LC Lens.
3차원적 시뮬레이션에 의한 TFT-LCD의 Gray Scale 성능 분석
김선우,박우상,Kim, Sun-Woo,Park, Woo-Sang 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.3
We analyzed the effect of a pixel and all the inter-electrode capacitances in a unit pixel of TFT-LCDs on the gray scale capability. The pixel and all the inter-electrode parasitic capacitances were obtained from the tree dimensional profiles of potential distribution and molecular director considering lateral fields generated at the edge of the pixel. To obtain the RMS and kickback voltages of the pixel, we constructed an equivalent circuit of the panel containing all the parasitic capacitances. The calculation was performed though H-SPICE. As results, we confirmed that the pixel becomes smaller, the effect of parasitic capacitances on the gray scale capability becomes larger.
FFS모드의 투과율 향상을 위한 새로운 화소전극 구조제안
이원준,박우상,Lee, Won-Jun,Park, Woo-Sang 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.11
In this study, we propose a new pixel edge shape of the fringe field switching(FFS) mode which ensures more stable movement of liquid crystal molecules and higher transmittance at the edge part. the electro optical properties were calculated 3-dimensionally using by commercially available "Techwiz LCD". From the simulation results, we showed that the dynamic stability of liquid crystal molecules was obtained in a new pixel structure. We also revealed that the transmittance of the new pixel structure increased more than 6 % compared to that of the conventional pixel structure.
Weak Anchoring 에너지를 고려한 TN-LCD의 Simulation
정진택,박우상,Jung, Jin-Taek,Park, Woo-Sang 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.11
In this thesis, an anchoring energy in the upper and lower substrates of TFT-LCD cell has been modeled and applied in the numerical calculation of the molecular orientation of the TN-LCD. The molecular orientation of liquid crystals defined as tilt and twist angles was simulated using the Newton-Raphson method and the Gaussian integration method. From the results, the tilt and twist angles for the strong anchoring energy were proven to be coincide with those of the conventional results. on the other hand, for the weak anchoring energy, azimuth angles of the molecules were changed abruptly from $0^{\circ}\;to\;90^{\circ}$ near the middle area of the cell due to the balance of the anchoring energy and the elastic energy of the liquid crystals.
흐름효과를 고려한 IPS-LCDs, VA-LCDs의 전기광학적 특성 시뮬레이션
김훈배,박우상,Kim, Hoon-Bae,Park, Woo-Sang 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.2
In this paper, we analyzed the molecular behavior of IPS-LCDs and VA-LCDs by using numerical simulation. The numerical simulation was performed on the basis of Ericksen-Leslie continuum theory. To improve the accuracy of the calculation, we considered fluid balance equation and director balance equation at the same time. thus, we calculated the flow effect for both switching on and off states. As the results of simulation, we confirmed abnormal twist in IPS-LCDs and fast molecular behavior in VA-LCDs which could influence response time.