Scientists are developing inexpensive,
energy efficient lithium ions batteries for electric vehicles by using silicon based
anodes made from the fossilized remains of single celled algae called diatoms. The
research at the University of California, Riverside (UCR) could lead to the
development of ultra-high capacity lithium ion batteries for electric vehicles
and portable electronics. The anode of lithium ion batteries is mostly made of
graphite but the mineral’s performance is a limiting factor in making batter
batteries and expanding their applications. Silicon, which can store about 10
times more energy, can be an alternative anode material, but its production is
expensive. To change that, the team turned to a cheap source of silicon –
diatomaceous earth (DE) – and more efficient chemical process. Using a process
called magnesiothermic reduction, the group of scientists converted this
low-cost source of silicon dioxide to pure silicon nano=particles. A significant
finding in our research was the preservation of the diatom cell walls –
structures known as frustules – creating a highly porous anode that allows easy
access for the electrolyte.
Saturday, 5 November 2016
A Toothpaste That Is Almost As Good As Statins
Specially-formulated toothpaste
that identified where plaque is on the teeth could help prevent heart attacks. The
toothpaste was found to remove twice as much plaque as normal toothpaste. It also
helped to reduce inflammation levels by 29%, which is almost the same kind of
reduction achieved by statins (37%) that are used to lower cholesterol. Reducing
inflammation is important as people who have gum disease have higher rates of
coronary heart disease, which can lead to a heart attack. It isn’t clear
whether this is because of a direct biological link between the two – for example,
that the process of inflammation of the gums directly affects the build-up of
plaque in the coronary arteries – or because people who have gum disease are
more likely to have unhealthy lifestyle habits, which would directly contribute
towards coronary heart disease. Using the toothpaste is a fairly simple thing
to do, yet it seems to have a big impact. And there are no side effects that
researchers know of. We get the benefit of better oral health and potentially
big heart benefits too.
Your Footstep Can Generate Electricity
Move over solar energy! Researchers
have developed a novel, inexpensive and simple method that can convert
footsteps into usable electricity. The method developed by researchers at
University of Wisconsin-Madison in the US puts to good use a common waste
material: wood pulp. The pulp, which is already a common component of flooring,
is partly made of cellulose nanofibres – tiny fibers that, when chemically
treated, produce an electrical charge when they come into contact with
untreated nanofibers. When the nanofibres are embedded within flooring, they
are able to produce electricity that can be harnessed to power lights or charge
batteries. Because weed pulp is a cheap, abundant and renewable waste product
of several industries, flooring that incorporated the new technology could be
as affordable as conventional materials. Existing materials for harnessing
footstep energy are costly, non recyclable and impractical.
This New Bike Lock Makes Thieves Vomit Uncontrollably
A new bike lock brings on immediate
vomiting and trouble breathing for anyone who tries to break open it. Two inventors
from San Francisco, irritated by seeing bikes stole, have created a new lock
that makes anyone who tries to break through it be sick. The lock is triggered
whenever it senses someone who tries to break into it – and when it is, it
shoots out a burst of noxious spray, like a skunk, that has effects similar to
pepper spray. The lock was created after the inventors kept seeing their
friends have their bike stolen. The new lock doesn’t cause any lasting damage –
but does induce horrible effects in anyone that tries to break into it.
Friday, 4 November 2016
Now, Building That Alerts Of Damage In Real Time
MIT scientists are developing smart
buildings that can sense ambient vibrations and monitor itself for internal
signs of damage or mechanical stress in real time. The broader implication is,
after an event like an earthquake, we would see immediately the changes of
these features, and if and where there is damage in the system. This provides
continuous monitoring and a database that would be like a health book for the
building, as a function of time, much like a person’s changing blood pressure
with age. The team tested its computational model on a 21 story building made
in the 1960s using reinforced concrete. In 2010, researchers outfitted the
building with 36 accelerometers that record vibrations and movements on
selected floors, from the building’s foundation to its roof. But the model uses
a lot of assumptions about the building’s material, its geometry, the thickness
of its elements, etcetera, which may not correspond exactly to the structure.
Europe's Mars Craft Lost Before Landing
Europe’s second attempt at reaching
the Mars surface appeared in peril on 17 October as initial analysis suggested
a lander dubbled “Schiaparelli”, a test run for a future rover, may have
plummeted to its demise. While holding out faint hope, ground controllers said
it seemed the paddling pool-sized lander’s parachute may have been discarded
too early, and its fall-breaking thrusters switched off too soon. Schiaparelli
fell silent seconds before its scheduled touchdown, while its mothership Trace
Gas Orbiter (TGO) entered Mars’ orbit as planned – part of a joint
European-Russian quest for evidence of life on the red planet, past or present.
Further analysis must be done of some 600 megabytes of data Schiaparelli sent
home before its signal died, to “know whether it survived structurally or not.”
If not, this would be European second failed Mars landing in a row, joining a
string of unsuccessful at tempts by global powers to explore our planetary
neighbour’s hostile surface. The British built Beagle 2 robot lab disappeared
without trace after separating from its mothership, Mars Express, in 2003. Its remains
were finally spotted in a NASA photograph last year. Schiaparelli had travelled
for seven years and 496 million kilometres onboard the TGO to within a million
kilometres of Mars on Sunday, when it set off on its own mission to reach the
surface. The pair comprise phase one of the ExoMars mission through which
Europe and Russia seek to join the United States in probing the alien Martian
surface. The TGO is meant to sniff atmospheric gases potentially excreted by
living organisms, while Schiaparelli’s landing was designed to inform
technology for a bigger and more expensive rover scheduled for launch in 2020. The
six-wheel rover will be equipped with a drill to look for remains of past life,
or evidence of current activity, up to a depth of two metres. While life is
unlikely to exist on the barren, radiation-blasted surface, scientists say
traces of methane in Mars’ atmosphere may indicate something is stirring
underground – possible single celled microbes.
Tesla Will Make Cars 100% Auto-Pilot Ready
What this means:
Every new Tesla car, including Model S, Model X, and the forthcoming
Model 3, will be loaded with $8,000 worth of gadgets which will allow the
vehicles to eventually drive themselves once Tesla perfects the software to
make that possible.
What it does not mean:
The car will right now NOT be able to drive themselves. What
it does mean is that the cars can be updated easily to go auto-pilot once Tesla
has the software ready.
The Tesla self driving package:
- 8 surrounded cameras for 360 degree visibility around the car at up to 250m range.
- 12 updated ultrasonic sensors for detection of both hard and soft objects.
- Forward facing radar with enhanced processing ‘capable of seeing through heavy rain, fog, dust and even the car ahead.’
- A new onboard computer with more than 40 times the computing power of the previous generation.
Brand Sense:
Tesla is effectively positioning itself as the self-driving
car company before it actually rolls out self driving cars. Customers who would
prefer an autonomous car when the technology is ready can go for a Tesla right
away, and then wait for the technology to arrive.
Auto future:
- The hardware won’t do much at the moment but, over the next year, Tesla plans to test a more advanced version of its earlier auto-pilot programme.
- More advanced self driving capabilities in the pipeline for Tesla, although Musk has said ‘it’ll take us some time’ to perfect those.
- Tesla hopes to demonstrate a car travelling all by itself from Los Angeles to New York, without any driver guidance, by the end of 2017.
Where the tech is at present:
The partially self driving cars being sold now have
software, like Tesla’s Autopilot, that hand the controls back to humans when
the computer is unsure of what to do.
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