Cyber-Nationalism in China: Challenging Western Media Portrayals of Internet censorship in China

Reseña/Review (Jiang, Y., "Cyber-nationalism in China: challenging Western media portrayals of internet censorship in China". University of Adelaide, ISBN: 9780987171894, 156 págs., 2012)Book review: Jiang, Y. (2012). Cyber-nationalism in China: Challenging Western media portrayals of internet censorship in China. University of Adelaide Press.Book review: Jiang, Y. (2012). Cyber-nationalism in China: Challenging Western media portrayals of internet censorship in China. University of Adelaide Press

El poder vigilado de Hu Jintao

Hu Jintao emerge como nuevo líder chino aunque con numerosas sombras que han sido magistralmente dispuestas por su antecesor en la secretaría general del Partido, Jiang Zemin. Hu deberá afrontar importantes desafíos en el mandato que ahora inicia: consolidar una base de poder propia, gestionar un nuevo impulso de la reforma sin afectar a los delicados equilibrios políticos y sociales que garantizan la imprescindible estabilidad, y hacer valer nuevos argumentos para restablecer el diálogo con Taiwán

Jiang v. Atty Gen USA

Agenc

Jiang v. Atty Gen USA

USDC for the District of New Jerse

Jiang v. Atty Gen USA

Agenc

Jiang v. Atty Gen USA

Agenc

Violin students of Danwen Jiang

Niccolo PaganiniEugene YsayeBela BartokSergey ProkofievJean SibeliusJohn Coriglian

Functional MRI Assessment of Renal Fibrosis in Rat Models

poster abstractIntroduction Renal fibrosis is a common consequence of chronic kidney diseases which affects a large population. Therefore, it is important to establish imaging based noninvasive biomarkers to monitor the progression or regression of renal fibrosis instead of biopsy. Magnetic resonance imaging (MRI) could provide both high spatial resolution and excellent tissue contrast for visualization of kidney morphology. Moreover, MRI is capable of assessing pseudo perfusion (Df) and perfusion fraction (Pf) with intra-voxel incoherent motion (IVIM) imaging (1), tissue oxygenation with T2* mapping (2), macromolecular composition with T1rho imaging (3) and kidney function (eGFR) with dynamic contrast enhanced (DCE) imaging (4). This study is aimed to evaluate the sensitivity of these MRI techniques to the renal fibrotic changes in a rat model. Methods A total of 4 rats were scanned at early (2-5 days) and late (25-35 days) time points after surgical intervention (unilateral ureteral obstruction to induce renal fibrosis) on a Siemens Tim Trio 3T scanner using an 80mm inner diameter 8-channel rat body coil (RAPID, USA) under a stable anesthetized condition. Axial images of 80mm FOV, 2mm slice thick and sub-millimeter in-place resolution were acquired for different functional MRI techniques with following parameters, respectively: IVIM with10 b-values of 0 - 750 s/mm2. T2*: with 10 TEs of 8 - 66 ms; T1rho: with 9 TSL times of 5 - 80 ms; DCE: with150 dynamic measurements at a temporal resolution of 1.01 s. before and after a 15s injection of 1.1 ml GD-DTPA through rat tail with a power injector. Functional data were processed and analyzed using custom MATLAB programs or analysis tools installed in the MRI console workstation. Results Figure 1 shows an anatomical image of the obstructed (R) and healthy (L) rat kidneys. Figures 2-4 show example T1rho map, IVIM Df map, and T2* map, respectively. Quantitative results based on ROI measurements are summarized in table 1. Changes consistent with the expected progression of fibrosis were observed in the obstructed kidney (R) while the healthy kidney (L) and muscle region remained stable. Figure 5 shows the DCE-MRI images at baseline as well as 45s, 95s and 240s after contrast infusion. The timing and intensity of signal changes are clearly different between two kidneys. Quantitative results of DCE-MRI data and comparison with PET study is reported in a separate abstract. Discussion High quality anatomical and functional images of rat kidney can be obtained on a clinical 3.0T MR scanner with dedicated small animal coils and optimized imaging techniques. The findings suggest that IVIM, T2*, T1rho and DCE can be used to assess and monitor different aspects of physiological changes in kidney fibrosis

A Novel Quality Assessment for Visual Secret Sharing

poster abstractThere is a variety of visual data, such as pictures, text, military or medical records, biometric patterns, etc. that need to be protected for privacy reasons. Visual secrets are different from textual secrets, in that the information obtained by perceiving the visual data needs to be protected. Visual secret sharing (or visual cryptography) [1] proposed in 1994 is a practical solution to this. The secret information is encrypted by hiding it into random looking shares. The secret data is encrypted in such a way that the decryption becomes a physical operation that is performed without computer. How much of the secret information can be retrieved depends on the visual quality of the decryption result. However, there is no practical tool for visual quality evaluation currently. The common visual quality metrics such as contrast [2], blackness [3], PSNR [4] and SSIM [5] cannot represent the visual quality properly as we demonstrate in our work. A fair and uniform visual quality metric is needed urgently. We propose a novel approach for visual quality evaluation. It is straightforward to implement and applicable to various applications in visual cryptography