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        Characteristics of Interface States in One-dimensional Composite Photonic Structures

        Qingyue Zhang,Weitao Mao,Qiuling Zhao,Maorong Wang,Xia Wang,Wing Yim Tam 한국광학회 2022 Current Optics and Photonics Vol.6 No.3

        Based on the transfer-matrix method (TMM), we report the characteristics of the interface states in one-dimensional (1D) composite structures consisting of two photonic crystals (PCs) composed of binary dielectrics A and B, with unit-cell configurations ABA (PC I) and BAB (PC II). The dependence of the interface states on the number of unit cells N and the boundary factor x are displayed. It is verified that the interface states are independent of N when the PC has inversion symmetry (x = 0.5). Besides, the composite structures support the formation of interface states independent of the PC symmetry, except that the positions of the interface states will be varied within the photonic band gaps. Moreover, the robustness of the interface states against nonuniformities is investigated by adding Gaussian noise to the layer thickness. In the case of inversion symmetry (x = 0.5) the most robust interface states are achieved, while for the other cases (x ≠ 0.5) interface states decay linearly with position inside the band gap. This work could shed light on the development of robust photonic devices.

      • Changes in Markers of Liver Function in HCV 1b Patients with Compensated Cirrhosis Treated with Ombitasvir/Paritaprevir/ Ritonavir plus Dasabuvir with Ribavirin

        ( Jeong Heo ),( Yan Luo ),( Wan-long Chuang ),( Jidong Jia ),( Kwang-hyub Han ),( Ming-lung Yu ),( Hong Tang ),( Young-suk Lim ),( Cheng-yuan Peng ),( Min Xu ),( Maorong Wang ),( Bo Fu ),( Niloufar Mo 대한간학회 2017 춘·추계 학술대회 (KASL) Vol.2017 No.1

        Aims: Patients chronically infected with HCV are at risk of developing extrahepatic manifestations of HCV as well as progressing to compensated or decompensated cirrhosis and HCC. Although current treatments have high rates of SVR, relatively little is known about possible regression of liver fibrosis after achieving an SVR. The ONYX-II trial examined the efficacy and safety of ombitasvir/paritaprevir/ritonavir plus dasabuvir + ribavirin (RBV) in Asian patients with HCV genotype 1b infection and compensated cirrhosis. Here we report changes in key markers of liver fibrosis and function. Methods: Patients with chronic HCV GT1b infection and compensated cirrhosis were enrolled in China, South Korea and Taiwan and received 12 weeks of OBV/PTV/r (25 mg/150 mg/100 mg once daily) and DSV (250 mg twice daily) with weight-based RBV. The primary objective of ONYX-II was to assess efficacy (SVR12) and safety of the regimen. Changes in markers of liver fibrosis and function between baseline (BL) and post-treatment week (PTW) 12 are presented. Results: Overall, 104 patients were enrolled and treated in ONYX-II. All patients (104/104, 100%) achieved SVR12. BL and PTW12 data for FibroTest score, alanine aminotransferase (ALT), aspartate aminotransferase (AST), total bilirubin, albumin, platelet count and alpha fetoprotein (AFP) are shown in Table 1. All selected parameters showed numerical improvements between BL and PTW12. Mean ALT and AST levels returned to within normal range and FibroTest scores demonstrated a numerical improvement, suggesting improvement in liver status. The complete set of data between BL and PTW12 will be presented for these parameters and other liver composite parameters at the conference. Conclusions: Measurement of key liver function markers during the ONYX-II trial showed a numerical improvement within 12 weeks of completion of treatment in HCV GT1b-infected patients with compensated cirrhosis. Further follow-up of these patients will determine the long-term durability of these changes.

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