منابع مشابه
Policy: Budget could send space science off in new directions at NASA.
The budget outline the White House unveiled on 28 February caps a week of startling news for NASA. On orders from the White House, NASA managers last week told Congress they intend to cancel plans for a Pluto flyby and a mission to study the solar wind. The agency is also following orders to make major cuts to the international space station after acknowledging huge cost overruns in the orbitin...
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Background: This study describes the possibility of implementing three-dimensional printing technology to create a precise construction of a planned bolus, based on computed tomography information stored in the Digital Imaging and Communications in Medicine (DICOM) format file. Materials and Methods: To create the bolus with a 3D printer, we converted data in the DICOM format to the s...
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Rivest et al proposed a time-lock puzzle scheme for encrypting messages which can only be decrypted in the future. Such a puzzle speci es an algorithm for decrypting the message locked in and the speci ed algorithm has a well understood time complexity. However, that time-lock puzzle scheme does not provide a means for one to examine whether a puzzle has been formed in good order. Consequently,...
متن کاملThinking like Archimedes with a 3D printer
We illustrate Archimedes’ method using models produced with 3D printers. This approach allowed us to create physical proofs of results known to Archimedes and to illustrate ideas of a mathematician who is known both for his mechanical inventions as well as his breakthroughs in geometry and calculus. We use technology from the 21st century to trace intellectual achievements from the 3rd century ...
متن کاملColor Printer Characterization by 3D Triangulation
A new method for the colorimetric characterization of a printer is proposed. It can also be applied to any other type of digital image reproduction device. The method is based on a computational geometry approach. It uses a 3D triangulation technique to build a tetrahedral partition of the printer color gamut volume and it generates a surrounding structure enclosing the definition domain. The c...
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ژورنال
عنوان ژورنال: Nature
سال: 2014
ISSN: 0028-0836,1476-4687
DOI: 10.1038/513156a