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Submission + - Google publishes Zopfli as open-source compression algorithm (

alphadogg writes: Google is open-sourcing a new general purpose data compression library called Zopfli that can be used to speed up Web downloads.
The Zopfli Compression Algorithm, which got its name from a Swiss bread recipe, is an implementation of the Deflate compression algorithm that creates a smaller output size compared to previous techniques, wrote Lode Vandevenne, a software engineer with Google's Compression Team, on the Google Open Source Blog on Thursday. "The smaller compressed size allows for better space utilization, faster data transmission, and lower Web page load latencies. Furthermore, the smaller compressed size has additional benefits in mobile use, such as lower data transfer fees and reduced battery use," Vandevenne wrote. The more exhaustive compression techniques used achieve higher data density but also make the compression a lot slower. This does not affect the decompression speed though, Vandenne wrote.


Submission + - Zopfli compresses 3-8% more than gzip at a heavy CPU cost (

more writes: The Zopfli Compression Algorithm is a new open sourced general purpose data compression library that got its name from a Swiss bread recipe. The output generated by Zopfli is typically 3–8% smaller compared to zlib at maximum compression, and we believe that Zopfli represents the state of the art in Deflate-compatible compression. Zopfli is bit-stream compatible with compression used in gzip, Zip, PNG, HTTP requests, and others.

Submission + - Quantum wavefunction is a real physical object aft (

cekerr writes: Nature reports:
  Quantum theorem shakes foundations
The wavefunction is a real physical object after all, say researchers.

"... the new paper, by a trio of physicists led by Matthew Pusey at Imperial College London, presents a theorem showing that if a quantum wavefunction were purely a statistical tool, then even quantum states that are unconnected across space and time would be able to communicate with each other. As that seems very unlikely to be true, the researchers conclude that the wavefunction must be physically real after all.

David Wallace, a philosopher of physics at the University of Oxford, UK, says that the theorem is the most important result in the foundations of quantum mechanics that he has seen in his 15-year professional career. “This strips away obscurity and shows you can’t have an interpretation of a quantum state as probabilistic,” he says.

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