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—This paper proposes a novel reversible data hiding scheme based on a Vector Quantization (VQ) codebook. The proposed scheme uses the principle component analysis (PCA) algorithm to sort the codebook and to find two similar codewords of an image block. According to the secret to be embedded and the difference between those two similar codewords, the(More)
In this study, advanced control of crystallographic orientations and magnetic properties of self-assembled nanostructures via rational selections of substrates is demonstrated. We show that in the perovskite-spinel BiFeO(3)-CoFe(2)O(4) model system the crystal orientation of self-assembled CoFe(2)O(4) nanopillars can be tuned among (001), (011), and (111),(More)
With the rise and development of information technology (IT) services, the amount of data generated is rapidly increasing. Data from many different places are inconsistent. Data capture, storage and analysis have major challenges. Most data analysis methods are unable to handle such large amounts of data. Many studies employ neural networks, mostly(More)
  • Pei-Yu Tsai
  • 2015
Hospice palliative care for terminal patients is necessary, yet challenges are on the way worldwide. This study demonstrated that hospice palliative care has been quickly developed in Taiwan due to the support of the National Health Insurance system, the promotion by civil societies and religious groups, patient's legal right for DNR, easier access to pain(More)
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