Introduction: The aim of this study was to evaluate over a 180-day period the biocompatibility and retinal support of a foldable capsular vitreous body injected with either saline or silicone oil implanted in rabbit eyes.

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Three-dimensional Ce-doped ZnO was synthesized via coprecipitation and roasting processes. The samples were characterized by X-ray diffraction, scanning electron microscopy, specific surface area (Brunauer-Emmett-Teller method), and photoluminescence spectra. Also, the photocatalytic activities of ZnO and Ce-doped ZnO were investigated in ultraviolet light for degradation of methylene blue solution. The results indicated that the concentration of NaOH and the doping amount of Ce showed great influence on morphology, structures, and properties of Ce-doped ZnO. When the (Ce 3+ +Zn 2+)/OH 2 was 1:2.5 and the concentration of Ce was 2 mol%, the morphology of the Ce-doped ZnO was microspheres with superstructures assembled by large amounts of interleaving nanosheets. The morphology transformed from microspheres with superstructures to amorphous by changing the ratio of (Ce 3+ +Zn 2+)/OH 2 from 1:2 to 1:3. The photoluminescence spectra indicated that the recombination rate of photogenerated electron-hole pairs of Ce-doped ZnO was suppressed. The prepared Ce-doped ZnO showed much enhanced photocatalytic property than pure ZnO. When the doping concentration of Ce was 2 mol%, the Ce-doped ZnO photocatalysts showed best photocatalytic activity with 99.10% degradation of methylene blue solution after 2 h.

The data layout of traditional RAID can't adapt to the heterogeneous RAID that consists of disks with different capacity and/or performance, because it will cause waste of disk storage space and decrease of the integrated disks' bandwidth. Based on the concept of "stripe pattern", we bring out the concept of "pseudo stripe pattern" and propose to place data in heterogeneous RAID with repetitions of pseudo stripe pattern. It takes into account of storage space and array I/O bandwidth, while promising acceptable data management overhead. The results of simulations validate that heterogeneous RAID applying our data layout policy exhibits better and steadier performance compared with that applying traditional RAID data placement.

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