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What Does an Engineer Look Like?
A tech company asked a female
employee, a platform engineer,
to participate in their recruitment
ad campaign. After her photo
appeared on billboards around
San Francisco, social media users
commented that she didn’t “look
like an engineer” and therefore
they didn’t buy the ad’s message.
Others said she didn’t appear
friendly enough because she
wasn’t smiling, or that the ad
must only be intended to recruit
women. The employee started a Twitter campaign,
#iLookLikeAnEn-gineer, to prove that there’s no one-size-fits-all mold when it comes to
Drinkable Book Saves Lives By Using
Nanotechnology to Purify Water
A United Nations/Millennium Development Goals Report 2012 study says that
11 percent of the global population does
not have access to an improved source
of drinking water. The Drinkable Book,
developed by a postdoctoral researcher
at Carnegie Mellon University, provides
people with information about the importance of clean drinking water. And then
the book itself becomes a tool for the
task. The book’s pages are treated with
silver or copper nanoparticles, used to kill
bacteria and some viruses in water as it is
filtered through the paper.
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• Study Says That Most Ground Beef Has
All meat potentially contains bacteria that — if
not destroyed by proper cooking — can cause
food poisoning, but some meats are more risky
than others. Beef, and especially ground beef,
has a combination of qualities that can make it particularly problematic — and the consequences of eating tainted beef can be
severe. Consumer Reports purchased 458 lbs. of various types of
ground beef, and analyzed the samples for five common types of
bacteria. The results were sobering. All 458 lbs. of beef that were
examined contained bacteria that signified fecal contamination (
en-terococcus and/or nontoxin-producing E. coli), which can cause
blood or urinary tract infections. Almost 20 percent contained C.
perfringens, a bacteria that causes almost 1 million cases of food
poisoning annually. Ten percent of the samples had a strain of S.
aureus bacteria that can produce a toxin that can make you sick.
That toxin can’t be destroyed — even with proper cooking.
• Graphene Nanoribbon Could Lead to Better Electronics
Graphene is a promising
candidate for the next
generation of dramatically faster, more energy-efficient electronics.
However, scientists have
struggled to fabricate the
material into ultra-narrow
strips, called nanoribbons,
which could enable the
use of graphene in high-performance semiconductor electronics. Now, engineers have discovered
a way to grow graphene
nanoribbons with desirable semiconducting properties directly on a
conventional germanium semiconductor wafer. This breakthrough
could allow manufacturers to easily use graphene nanoribbons in
hybrid integrated circuits, which promise to significantly boost the
performance of next-generation electronic devices. This technology
could also have specific uses in industrial and military applications,
such as sensors that detect specific chemical and biological species
and photonic devices that manipulate light.
Progressively zoomed-in images of graphene
nanoribbons grown on germanium. The rib-
bons automatically align perpendicularly and
naturally grow in what is known as the armchair
edge configuration. Images: Arnold Research
Group and Guisinger Research Group
pAge drinking paper in India.
Image: The Drinkable Book