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加州大学旧金山分校的研究人员通过一种能将大脑信号传递到计算机的设备，使一名瘫痪患者能够控制机械臂。他只需想象自己做出动作，就能抓取、移动和放下物体。这种被称为脑机接口（BCI）的设备在不需要调整的情况下工作了创纪录的7个月。此前此类设备通常只能工作一两天。BCI 依赖于一个能够适应大脑在重复动作——或者在这种情况下是想象中的动作——时发生的微小变化的人工智能模型，并学会以更精细的方式完成动作。研究人员与一名多年前因中风瘫痪的研究参与者合作。他无法说话或移动。研究人员在他的大脑表面植入了微小的传感器，这些传感器可以在他想象动作时捕捉大脑活动。为了查看他的大脑模式是否会随时间变化，研究人员让参与者想象移动身体的不同部位，如手、脚或头部。尽管他无法真正移动，但当参与者想象自己做出动作时，他的大脑仍然可以产生动作信号。BCI通过大脑表面的传感器记录了这些动作的代表。 UCSF:How a Paralyzed Man Moved a Robotic Arm with His Thoughts Cell:Sampling representational plasticity of simple imagined movements across days enables long-term neuroprosthetic control
加州大学旧金山分校的研究人员通过一种能将大脑信号传递到计算机的设备，使一名瘫痪患者能够控制机械臂。他只需想象自己做出动作，就能抓取、移动和放下物体。这种被称为脑机接口（BCI）的设备在不需要调整的情况下工作了创纪录的7个月。此前此类设备通常只能工作一两天。BCI 依赖于一个能够适应大脑在重复动作——或者在这种情况下是想象中的动作——时发生的微小变化的人工智能模型，并学会以更精细的方式完成动作。研究人员与一名多年前因中风瘫痪的研究参与者合作。他无法说话或移动。研究人员在他的大脑表面植入了微小的传感器，这些传感器可以在他想象动作时捕捉大脑活动。为了查看他的大脑模式是否会随时间变化，研究人员让参与者想象移动身体的不同部位，如手、脚或头部。尽管他无法真正移动，但当参与者想象自己做出动作时，他的大脑仍然可以产生动作信号。BCI通过大脑表面的传感器记录了这些动作的代表。 UCSF:How a Paralyzed Man Moved a Robotic Arm with His Thoughts Cell:Sampling representational plasticity of simple imagined movements across days enables long-term neuroprosthetic control
BY Solidot 纯净版
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At a time when the Indian stock market is peaking and has rallied immensely compared to global markets, there are companies that have not performed in the last 10 years. These are definitely a minor portion of the market considering there are hundreds of stocks that have turned multibagger since 2020. What went wrong with these stocks? Reasons vary from corporate governance, sectoral weakness, company specific and so on. But the more important question is, are these stocks worth buying?
Export WhatsApp stickers to Telegram on Android
From the Files app, scroll down to Internal storage, and tap on WhatsApp. Once you’re there, go to Media and then WhatsApp Stickers. Don’t be surprised if you find a large number of files in that folder—it holds your personal collection of stickers and every one you’ve ever received. Even the bad ones.Tap the three dots in the top right corner of your screen to Select all. If you want to trim the fat and grab only the best of the best, this is the perfect time to do so: choose the ones you want to export by long-pressing one file to activate selection mode, and then tapping on the rest. Once you’re done, hit the Share button (that “less than”-like symbol at the top of your screen). If you have a big collection—more than 500 stickers, for example—it’s possible that nothing will happen when you tap the Share button. Be patient—your phone’s just struggling with a heavy load.On the menu that pops from the bottom of the screen, choose Telegram, and then select the chat named Saved messages. This is a chat only you can see, and it will serve as your sticker bank. Unlike WhatsApp, Telegram doesn’t store your favorite stickers in a quick-access reservoir right beside the typing field, but you’ll be able to snatch them out of your Saved messages chat and forward them to any of your Telegram contacts. This also means you won’t have a quick way to save incoming stickers like you did on WhatsApp, so you’ll have to forward them from one chat to the other.
