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Researchers
have made DNA test tube computers before,
but output encoded in the makeup of DNA molecules
is tough to read. Researchers have also coaxed
strands of DNA to stack up into neat rows.
Sheets of DNA that form a barcode pattern
could make reading answers generated from
DNA computing a lot easier. The method may
also make it possible to construct electronics
components molecule-by-molecule.
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Study reveals Net's parts
Despite its other-worldly cyber side, the Internet
is rooted in the geopolitical boundaries of the
real world - its natural organization includes groupings
that conform largely to national borders. Spaces
between groupings are Internet fault lines that
reveal where the global network is most vulnerable
to splitting apart.
Recommenders
can skew results
Some online recommender systems have a built-in
weakness that can skew results. Where opinions are
concerned, people tend to go where others have gone
before. Recommender systems that show others’ opinions
in the process of gaining new ones can unduly influence
the results. This makes it possible to game the
system in the short-term, but it fosters long-term
distrust in the system.
Light
pipes track motion
Giving computers the ability to visually track moving
objects usually requires cameras and sophisticated
software. The right arrangement of small pipes and
light detectors can accomplish the same task without
the expensive hardware or computing resources. It's
all about viewing the world one slice at a time.
News briefs
Material
helps bits beat heat... Process
puts nanotubes in place... Printing
method makes biochips... Tiny
T splits light... Tiny
walls sprout nanowires... Big
sites hoard links.
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