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    Category Technology/Electronics

    DeepMind achieves Giant Leap in Sorting Speed

    June 13, 2023, Categories  Physics, Technology/Electronics

    Fundamentally different algorithms discovered by AlphaDev. a, A flow diagram of the variable sort 4 (VarSort4) human benchmark algorithm. In this algorithm, a sequence of unsorted numbers are input into the algorithm. If the sequence length is four, three or two numbers, then the corresponding sort 4, sort 3 or sort 2 sorting network is called that sorts the resulting sequence. The result is then returned and output by the function. b, The VarSort4 algorithm discovered by AlphaDev. This algorithm also receives sequences of length four, three or two numbers as input. In this case, if the length is two, then it calls the sort 2 sorting network and returns. If the length is three then it calls sort 3 to sort the first three numbers and returns...
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    Ultrashort Light Pulses Shaped like a Spring Toy bring a new Twist to Photonics

    June 12, 2023, Categories  Physics, Technology/Electronics

    It's spring time! Ultrashort light pulses shaped like a spring toy bring a new twist in photonics
    Synthesizing space–time beams with broadband topological–spectral correlations. Credit: Nature Photonics (2023). DOI: 10.1038/s41566-023-01223-y

    We’ve all played at least once with a spring toy, but did you know that light can be shaped like a spring too?

    An international team of researchers, led by Marco Piccardo, a former researcher at the Italian Institute of Technology (IIT) and now a Professor in the Physics Department of Técnico Lisboa and Principal Investigator at the Engineering Institute for Microsystems and Nanotechnologies (INESC MN), has harnessed ultrafast optics and structured light to synthesize in the laboratory a new family of spatiotemporal light beams, known as light springs.

    The research was done in collaboration between IIT, Politecnico di Milano and Téc...

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    Unlocking Photonic Computing Power with Artificial ‘Life’

    June 9, 2023, Categories  Physics, Technology/Electronics

    Unlocking photonic computing power with artificial 'life'
    Photonic platform for simulating complex phenomena using elementary cellular automata. a Schematic of the experimental setup. Cells are represented by pulses of light produced by a mode-locked laser (MLL) with a repetition rate of TR. The cell states are encoded by an electro-optic modulator (EOM) and are split into optical fiber delay lines (blue lines) to induce local interactions of neighboring light pulses. Specific ECA rules are programmed by tuning the variable optical attenuator (VOA) in each delay line. Optoelectronic thresholding is performed following the coherent interference of light pulses, with the resultant cell states stored on a field-programmable gate array (FPGA) and reinjected (black lines) to drive the input EOM for the next iteration. b Truth table showing the unifor...
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    Robot ‘Chef’ Learns to Recreate Recipes from Watching Food Videos

    June 7, 2023, Categories  Physics, Technology/Electronics

    Researchers have trained a robotic ‘chef’ to watch and learn from cooking videos, and recreate the dish itself.

    The researchers, from the University of Cambridge, programmed their robotic chef with a ‘cookbook’ of eight simple salad recipes. After watching a video of a human demonstrating one of the recipes, the robot was able to identify which recipe was being prepared and make it.

    In addition, the videos helped the robot incrementally add to its cookbook. At the end of the experiment, the robot came up with a ninth recipe on its own. Their results, reported in the journal IEEE Access, demonstrate how video content can be a valuable and rich source of data for automated food production, and could enable easier and cheaper deployment of robot chefs.

    Robotic chefs have been fe...

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