Tatsuki Ueda

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In the original publication of this article, Table 2 header has been mentioned incorrectly. Now the correct header is provided in this erratum. In Table 2 (page 237), percentile discharges on line 1 marking the rated discharges should be: In addition to that, the text in the following lines must be modified according to the above changes in the header,(More)
This study aims to propose a water management scheme that will balance two objectives, irrigation and hydropower, assuming a hydropower plant is annexed at an existing irrigation dam. A case study was conducted at a dam in northeast Japan that has operated solely for supplying irrigation water since construction. We simplify and focus the analyses by(More)
Bioethanol production from rice-straw is carbon neutral and less competitive with food supplies, so it provides great possibilities for resolving global issues. This study aims to conduct economic and environmental evaluations on rice-straw bioethanol production in Vietnam, where huge amounts of unused rice-straw are available, by a top–down life-cycle(More)
This paper presents a novel watermarking scheme, which is designed for cryptographic data such as keys, cipher- texts, and signatures. Such a cryptographic data is defined carefully based on its mathematical structure in order to provide correctness and security. Thus, in general, crypto- graphic data has no redundancy and modified data cannot work for(More)
In this paper, a palette partition based data hiding for color images is proposed. The palette used in color image quantization is partitioned into sub-palettes according to the similarity of colors. Any size of sub-palettes is permitted and a color can appear in several sub-palettes at the same time. Furthermore, a mapping function is designed to process(More)
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