Many of our everyday activities use energy: the google searches we make, the cars we drive, the flights we take, almost anything that is even remotely connected to the microchip. The
good news, however, is that IT advancements can help reduce the carbon
footprint of our normal activities. Here’s how:
New IT Infrastructure:
In
2002 when I was doing my Masters in IT, our university had "thin
clients" in all labs, which meant that just a few SUN servers could
support the work of around 1000 students. Concentrating all applications
on a single server and a single computing resource generates sheer cost savings
(not just in terms of hardware and thus e-waste but also in terms of energy).
As
a professional, working on thin clients was not feasible; instead we used
"virtual machines." Virtualization uses almost the same idea—maximising the value of a machine. Every time
you use your PC or mac, it is more than likely than not that your machine is
not using its full capacity, but still consuming significant energy.
Virtualization allows a server to run multiple operating systems at the same
time. Each of these operating systems can then be provided to developers in a
configuration that best suits their needs.
More
recently, cloud computing has eliminated the need for companies to own their
own servers. Different companies can now take advantage of cost savings by
using common infrastructure offered by the cloud provider.
Stop-start technology:
Stop-start
automatically turns off the engine when an electric or hybrid car stops or when
clutch is released. This reduces fuel consumption by 58%. Although the
development of this technology required significant enhancements to the engine
and transmission, the important role of engine micro controller can not be
discounted. The micro controller detects the velocity of car and the position
of the clutch, shutting off the spark and fuel to engine for it to stop, and
reversing the process to start the car.
Flying like birds:
The
V formation that we normally see in migrating birds is not just because they
like to follow each other, the formation actually helps birds conserve energy.
We should not be surprised if in future we see airplanes following the same
formation on transatlantic or transpacific routes. Initial tests of this
approach are now being carried out with Australian flights on transpacific
routes. Computers onboard and on land play a critical role in this development
by guiding the precise path (direction, altitude and velocity) that each flight
in the flock should take.
Faster searching
Without
going into the details of Google’s servers, the more the "machine
instructions" a program uses, the more processing time is required. The
number of machine instructions executed depends on the efficiency of the search
algorithm. Every time Google engineers improve this algorithm, our search
results show up faster. Ultimately, improved response time means that the same
Google server can now handle more search requests, thus reducing the need for
new servers.
On
our end, a faster response directly relates to time and energy savings. An
improvement as small as 0.01 second per search translates to 125 million
seconds of savings per month globally (based on 12.5 billion google searches
per month). That is, if all these people were using your computer sequentially,
the 0.01 second of improvement would allow you to switch off your computer 3.96
years (125 million seconds) sooner!
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