“头足类动物能够通过调控皮肤的乳突(皮肤上可伸缩的微小突起)和色素细胞改变自身纹理和颜色,这是它们实现惊人伪装能力的关键。”该论文的共同通讯作者、斯坦福大学博士生西达尔特·多希在接受本报记者采访时表示,研究团队一直希望能在工程材料上复现这一精妙的自然机制。一次偶然的发现让他们找到了突破口。“我们发现,一块曾在扫描电子显微镜下观察过的PEDOT:PSS(一种导电聚合物)样品,其被电子束照射的区域,溶胀行为(指材料接触溶剂时因溶剂分子渗透而发生的膨胀现象)与未照射区域截然不同。受到电子束照射的区域,其结构变得紧致,遇水后的膨胀能力被大大抑制;而未照射的区域则能自由吸水大幅隆起。”多希说。
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"Now that we have these types of risks, with the leaders at companies, with CEOs, being deepfaked, I think company executives will be spending more time with their chief information security officers and teams than before. And that is a good thing."
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(Video by Bismuth) The world of Super Mario 64 is more or less a 3-dimensional torus \(T^3\). Marios position is stored as a float, but cast down to a short for the collision detection, meaning that only values up between \(-32768\) and \(32767\) are actually detected as different positions for the collision detection. Therefor marios position detection is calculated in \(B:= (\mathbb{R}/65536\mathbb{Z})^3\), and his actual position is calculated in \(P:=(\mathbb{R} / (1.17549435 \times 10^{-38})\mathbb{Z})^3\), here we still need to mod out, because of Nintendo 64 IEEE‑754 floating point arithmetic.
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