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Science & Technology |
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After 3G,
TD-LTE may drive telecom
MUMBAI: Even as the government hopes to
raise around $9 billion from the 3G and
BWA auctions, foreign telcos waiting in
the wings are eager to unfurl a new
technology — TD-LTE —which is akin to 4G
technology.
US-based Qualcomm and Sweden's Ericcson
aim to piggyback on TD-LTE, hoping that
it will help them gain a toe-hold in
India, the world's fastest growing
mobile market. Qualcomm is to
participate in the broadband wireless
access (BWA) spectrum auction. If it
does secure its bid in the auction,
India could well become the first
country after China to roll out TD-LTE.
TD-LTE, or Time Division Long Term
Evolution, caters to peak download
speeds of 100 Mbps on mobile phones,
compared to the 20 Mbps for 3G and 40
Mbps for Wimax. LTE brings to the table
additional spectrum, more capacity,
lower cost, and is essential to take
mobile broadband to the mass market.
The government has slotted the sale of
two 2.3 GHz blocks of spectrum on April
11, providing 20 MHz spectrum in each of
the country's 22 telecom circles. The
base price has been set at $ 385
million. However, Qualcomm will need an
Indian partner for its TD-LTE foray in
the country since foreign direct
investment is limited to 74%.
The US telco aims to use the 2.3 GHz
spectrum band offered for TD-LTE-based
BWA services. Sources in the know told
TOI that the company would bid
aggressively to corner one of the two
BWA slots up for sale. There are 11
bidders for the BWA auction.
Asked to comment on the market dynamics,
Sandeep Ladda, executive director,
PricewaterhouseCoopers (PWC), said:
"Though the Indian market is huge, it
won't be smooth sailing post auction. We
are adding 1 crore customers a month and
in January, we added 1.9 crore
customers, but the implementation of the
new technology has its own cost. And
India is a very cost conscious market."
Eager to play by the rules in India,
Qualcomm has notified that it would
enter into a joint venture with an
Indian partner to launch its services
and later exit from the joint venture
after the network becomes operable.
GTL Infrastructure and Tulip Telecom are
reportedly in the fray as JV partners,
but officials at both the firms refused
to comment on "market speculation". At a
recent presentation, Kanwalinder Singh,
president of Qualcomm India, said that
59 networks across 28 countries have
committed to LTE. The Indian market,
with vast population and low
penetration, could well drive economies
of scale. |
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The
chilli hand grenade is ready to explode!
TEZPUR (ASSAM): It's ready to explode
and not just in the mouth. The 'bhut
jolokia' - recognised as the hottest of
spices - will pack a punch when mixed
with handgrenades to deal with
terrorists, as trials by Indian defence
scientists have shown.
A defence spokesperson said scientists
at the Defence Research and Development
Organisation (DRDO) in Tezpur in
northern Assam were making a trial run
of the hand grenades and other
repellents by using the bhut jolokia.
"The chilli grenade is a non-toxic
weapon and when used would force a
terrorist to come out of his hideouts as
the smell is so pungent that it would
literally choke them," R.B. Srivastava,
a senior scientist and director of the
DRDO said.
The DRDO scientists had already carried
out trials for the hand grenades mixed
with the world's hottest chilli and so
far the tests have been satisfactory.
The bhut jolokia belongs to the capsicum
chinese family and is native to Assam.
It is recognised by the Guinness Book of
World Records as the hottest of all
spices.
The hotness of the bhut jolokia,
measured in Scoville heat units was
1,001,304. It's nearly twice as hot as
Mexico's red savina (577,000), the
variety it replaced as the hottest. By
comparison, a New Mexico green chilli
contains about 1,500 Scoville units,
while an average jalapeno measures at
about 10,000.
"Work is on to develop other such things
using bhut jolokia for effective
utilisation by the security forces in
dealing with riots and tackling
insurgency and terrorists," Srivastava
said.
The non-lethal grenades devised by the
DRDO could numb the enemy and immobilise
them without seriously wounding or
killing them.
"There are other applications as well,
what we call women power. A specially
made chilli powder could act as a tool
for women to keep away anti-socials and
work in this regard is also on," he
said.
There were also plans to use bhut
jolokia paste or powder in teargas
shells for dispersing violent protesters
or rioters.
"We are also trying for a scientific
validation to find out if bhut jolokia
could be incorporated into the food menu
for soldiers in higher reaches to keep
them warm. Physiological studies are on
in this regard," Srivastava said.
And the chilli powder would also be
rubbed on the fences around army
barracks in the hope the strong smell
would keep animals out of bounds.
"The chilli paste could also act as a
major repellent against wild elephants
in some parts of Assam and other
northeastern states," the scientist
said.
A kilogram of bhut jolokia sells at
about Rs.300. |
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Super
disc to store 1,000 times more data than
a DVD
TOKYO: A Japanese research team has
found a material that could be used to
make a low-price super disc with data
storage capacity thousands of times
greater than a DVD, the lead researcher
said.
The material transforms from a black-colour
metal state that conducts electricity
into a brown semiconductor when hit by
light, according to Shin-ichi Ohkoshi,
chemistry professor at the University of
Tokyo.
The material, a new crystal form of
titanium oxide, can switch back and
forth between the metal and
semiconductor states at room temperature
when exposed to light, creating an
effective on-off function for data
storage.
It is "promising as a material for a
next-generation optical storage device",
Ohkoshi said on Monday.
A material that changes colour with
light can be used in storage devices as
colours reflect light differently to
contain different information. His team
has succeeded in creating the material
in particles measuring five-to-20
nanometres (a five-billionth to
20-billionth of a metre) in diameter.
If the smallest particle is used, the
new disc could hold more than 1,000
times as much information as a Blu-ray
disc, provided that matching
data-writing and reading equipment are
developed.
A single-layer Blu-ray disc can hold
five times as much data as a
conventional DVD.
Titanium oxide's market price is about
one-hundredth of the rare element —
germanium-antimony-tellurium — that is
currently used in rewritable Blu-ray
discs and DVDs, Ohkoshi said.
"You don't have to worry about procuring
rare metals. Titanium oxide is cheap and
safe, already being used in many
products ranging from face powder to
white paint," the professor said.
Ohkoshi said it was not known when a
disc with the material would be
manufactured and put to practical use,
adding that he would start talks with
private-sector companies for
commercialisation. |
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Heat-conducting polythene to take place
of wires?
NEW YORK: American scientists have
developed a new variety of polythene,
the most widely used polymer, that can
conduct heat like most metals yet
remains an electrical insulator.
The new form of polythene can be used as
a cheap alternative to metals in
electric applications like a computer
processor chip where it is important to
draw heat away from an object. Polymers
are materials made of long, chain-like
molecules.
Researchers at Massachusetts Institute
of Technology in US found that by
getting all polythene molecules line up
the same way, rather than forming a
chaotic tangled mass, as they normally
do, the polymer can be changed into heat
conductor.
The team achieved that by slowly drawing
a polythene fibre out of a solution,
using an atomic force microscope.
The fibre was about 300 times more
thermally conductive than normal
polythene along the direction of the
individual fibres, said team leader,
Gang Chen of MIT.
The high thermal conductivity of the new
fibre makes its useful for dissipating
heat in many applications such as solar
hot water collectors, heat exchangers
and electronics, said the report
published in journal Nature Materials.
Chen said that earlier attempts to
create a heat-conducting polymer by
adding other materials had yielded
modest result as the interfaces between
the two kinds of material tend to add
thermal resistance by scattering heat.
If such fibers could be made in large
quantities, they could provide a cheaper
alternative to metals used for heat
transfer in many applications,
especially ones where the directional
characteristics would come in handy,
such as heat-exchanger fins and
cellphone casings. Other applications
might be devised that take advantage of
the material's unusual combination of
thermal conductivity with light weight,
chemical stability and electrical
insulation. |
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Now, a
digital master key for all locks
LONDON: Do you find keeping track of
your keys a tedious job? Then here’s
your dream invention. Experts have come
up with a digital master key that’s
going to make your life a lot easier.
Computer giant Apple is set to
revolutionize the traditional door key
with introduction of a hi-tech
alternative nicknamed the "iKey". It
means people can stop carrying around a
bunch of keys, and instead use a single
electronic device to unlock their car,
front door and gain access to their
office.
The technology simply requires the users
to enter a pin code and wave the device
over an electronic pad fitted beside a
door to open it.
Apparently, a newly published patent
application, filed with the US Patent
Office, contains the details of the new
technology. It is speculated that the
next model of the iPhone will contain
this feature.
The application states: "The device can
communicate with an external device to
open a lock. By way of example, the
electronic device may be a model of an
iPhone.
In a home, householders would need to
install electronic, computer controlled
locks to their doors. The iPhone would
need to be registered with the locks so
that they could communicate with each
other. By rotating the iPhone near the
electronic lock, consumers then select
their pin numbers on a dial displayed on
the screen, as if entering a combination
on a safe.
If the combination entered matched the
one held by the electronic lock, the
door would open.
If not, an alarm could be sounded or
alerts sent to the householder to
indicate someone was attempting to gain
unauthorised entry. For safety purpose,
the device may be attributed with a
feature to encrypt any information that
passes between the iPhone and the
computer-controlled lock, preventing
hackers from "listening in".
Leander Kahney, a consumer technology
expert and author of a book and blog
called the Cult of Mac, said there were
rumours that Apple has been testing the
technology. "If true, it’s a very big
deal. As well as opening doors and
unlocking your car, it could also turn
your iPhone into an electronic wallet
and ID card," the Telegraph quoted him
as saying.
He added: "You’d be able to pay for
buses and trains, as well as your
morning coffee and groceries in a jiffy,
just by laying your iPhone on a special
pad, and the price is electronically
deducted from your account.
"The trouble is that the technology
hasn’t gone completely mainstream. If
Apple were to adopt the technology, they
would likely set the standard, and that
would drive widespread adoption as
everyone scrambles to make their systems
iPhone-friendly."
If granted, the application filed at US
Patent house will offer Apple legal
protection from other companies copying
its ideas and technology.
Steve Jobs, Apple’s chief executive,
said: "We can sit by and watch
competitors steal our patented
inventions, or we can do something about
it. We’ve decided to do something about
it.
"We think competition is healthy, but
competitors should create their own
original technology, not steal ours."
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