Saturday, September 15, 2012


                             FUTURE OF NANO COMPUTING

               Now-a-days nano technology is one of the fastest growing field in sciene and technology.Nanotechnology is employed in any field of science and technology.It is widely used in automobiles,medicine,chemistry,physics&other branches of science and technology.But now-a-days scientists are employing the nanotechnology in the field of computers which in future gives rise to NANOCOMPUTING
                 In the past twenty years, there has been a dramatic increase in the processing speed of computers, network capacity and the speed of the internet. These advances have paved the way for the revolution of fields such as quantum physics, artificial intelligence and nanotechnology. These advances will have a profound effect on the way we live and work, the virtual reality we see in movies like the Matrix, may actually come true in the next decade



NANOCOMPUTERS:
Scientists are trying to use nanotechnology to make very tiny chips, electrical conductors and logic gates. Using nanotechnology, chips can be built up one atom at a time and hence there would be no wastage of space, enabling much smaller devices to be built. Using this technology, logic gates will be composed of just a few atoms and electrical conductors (called nanowires) will be merely an atom thick and a data bit will be represented by the presence or absence of an electron.
A component of nanotechnology, nanocomputing will give rise to four types of nanocomputers:
• Electronic nanocomputers
• Chemical and Biochemical nanocomputers
• Mechanical nanocomputers
• Quantum nanocomputers
Electronic nanocomputers
Eletronic nanocomputers are created through microscopic circuits using nanolithography. [
Nanocomputers]

Chemical and Biochemical nanocomputers:
The interaction between different chemicals and their structures is used to store and process information in chemical nanocomputers. In order to create a chemical nanocomputer, engineers need to be able to control individual atoms and molecules so that these atoms and molecules can be made to perform controllable calculations and data storage tasks.

Mechanical nanocomputers:
A mechanical nanocomputer uses tiny mobile components called nanogears to encode information. Some scientists predict that such mechanical nanocomputers will be used to control nanorobots.
Quantum nanocomputers:
A quantum nanocomputer store data in the form of atomic quantum states or spin. Single-electron memory (SEM) and quantum dots are examples of this type of technology.

Humanizing Nanocomputers:
Apart from this, scientists aim to use nanotechnology to create nanorobotsthat will serve as antibodies that can be programmed. This will help to protect humans against pathogenic bacteria and viruses that keep mutating rendering many remedies ineffective against new strains. Nanorobots would overcome this problem by reprogramming selectively to destroy the new pathogens. Nanorobots are predicted to be part of the future of human medicine.


• SPRAY-ON NANO COMPUTERS:
Consider that research is being done at the Ediburgh University to create "spray-on computers the size of a grain of sand” that will transform information technology. The research team aims to achieve this goal within four years.
When these nanocomputers are sprayed on to the chests of coronary patients, the tiny cells record a patient’s health and transmit information back to a hospital computer. This would enable doctors to monitor heart patients who are living at home.
QUANTUM COMPUTERS:
A quantum computer uses quantum mechanical phenomena, such as entanglement and superposition to process data. Quantum computation aims to use the quantum properties of particles to represent and structure data. Quantum mechanics is used to understand how to perform operations with this data. The quantum mechanical properties of atoms or nuclei allow these particles to work together as quantum bits, or qubits. These qubits work together to form the computer's processor and memory. Qubits can interact with each other while being isolated from the external environment and this enables them to perform certain calculations much faster than conventional computers.
By computing many different numbers simultaneously and then interfering the results to get a single answer, a quantum computer can perform a large number of operations in parallel and ends up being much more powerful than a digital computer of the same size.
"In the tiny spaces inside atoms, the ordinary rules of reality ... no longer hold. Defying all common sense, a single particle can be in two places at the same time. And so, while a switch in a conventional computer can be either on or off, representing 1 or 0, a quantum switch can paradoxically be in both states at the same time, saying 1 and 0.... Therein lies the source of the power." Whereas three ordinary switches could store any one of eight patterns, three quantum switches can hold all eight at once, taking "a shortcut through time."
Quantum computers could prove to be useful for running simulations of quantum mechanics. This would benefit the fields of physics, chemistry, materials science, nanotechnology, biology and medicine because currently, advancement in these fields is limited by the slow speed of quantum mechanical simulations.
Quantum computing is ideal for tasks such as cryptography, modeling and indexing very large databases. Many government and military funding agencies are supporting quantum computing research to develop quantum computers for civilian and national security purposes, such as cryptanalysis.

                                                                                       
                                                                                                           



Monday, July 23, 2012


Hypersonic plane to fly at 20 times the speed of sound
17th July 2012
Research into stealth technology by the Defense Advanced Research Projects Agency (DARPA) in the 1970s and 1980s led to the world's most advanced radar-evading aircraft. This provided a major national security advantage to the United States. Today, that strategic advantage is being threatened as China and other nations' abilities in stealth and counter-stealth improve. Restoring that battle space advantage requires advanced speed, reach and range. Hypersonic technologies have the potential to provide the dominance once offered by stealth to support a variety of national security missions.
Extreme hypersonic flight at Mach 20 (i.e. 20 times the speed of sound) is an area of research where major advances have eluded researchers for decades. Thanks to programs by DARPA, the Army and Air Force in recent years, however, new information has been obtained about this challenging subject.
Integrated Hypersonics (IH) is a project currently underway at DARPA. This aims to test a full-scale, hypersonic "X-plane" by 2016. Travelling at Mach 20 (20,900 km/h), it could fly to anywhere in the world in under an hour. DARPA has already tested an early prototype hypersonic aircraft - the Falcon Hypersonic Technology Vehicle 2 (HTV-2) - which achieved Mach 20 in August 2011. However, this only remained airborne for nine minutes.

x plane

The IH program expands on previous research to include five primary technical areas: thermal protection system and hot structures; aerodynamics; guidance, navigation, and control (GNC); range/instrumentation; and propulsion.
At Mach 20, vehicles flying inside the atmosphere will experience intense heat, exceeding 3,500 degrees Fahrenheit, which is hotter than a blast furnace capable of melting steel, as well as extreme pressure on the aeroshell. The thermal protection materials and hot structures technology area aims to advance understanding of high-temperature material characteristics to withstand both high thermal and structural loads.
A new launch vehicle will be designed for the aircraft. Rocket propulsion will also be integrated into the vehicles, offering a mid-flight boost to extend their range.
DARPA will host a Proposers' Day on 14th August 2012, to detail the technical areas for which proposals are sought.
"By broadening the scope of research and engaging a larger community in our efforts, we have the opportunity to usher in a new area of flight more rapidly and, in doing so, develop a new national security capability far beyond previous initiatives," said Air Force Maj. Christopher Schulz, DARPA program manager.

x plane

World record: Scientists produce the lightest material in the world
18th July 2012
A network of porous carbon tubes that is three-dimensionally interwoven at nano and micro level – this is the lightest material in the world. It weights only 0.2 milligrams per cubic centimetre, and is therefore 75 times lighter than Styrofoam, yet it is very strong nevertheless. Scientists at Kiel University (KU) and Hamburg University of Technology (TUHH) have named their joint creation "Aerographite". The results are published as the cover story in Advanced Materials and were presented yesterday to the public.
Aerographite is jet-black, stable, electrically conductive, and ductile. With these unique properties and its very low density, the carbon-made material clearly outperforms all similar materials.
"Our work is causing great discussions in the scientific community. Aerographite weighs four times less than the previous world record holder", says Matthias Mecklenburg, co-author and Ph.D. student at the TUHH. The previous lightest material, a nickel material that was presented to the public about six months ago, is also constructed of tiny tubes. Only, nickel has a higher atomic mass than carbon. "Also, we are able to produce tubes with porous walls. That makes them extremely light", adds Arnim Schuchard, co-author and Ph.D. student at Kiel University.

Aerographite

Despite its low weight, Aerographite is highly resilient. While lightweight materials normally withstand compression but not tension, Aerographite features both: an excellent compression and tension load. It is able to be compressed up to 95 percent and be pulled back to its original form without any damage, says professor Rainer Adelung of Kiel University. "Up to a certain point, the Aerographite will become even more solid and therefore stronger than before", he points out. Other materials become weaker and less stable when exposed to such stress. "Also, the new material absorbs light rays almost completely. One could say it creates the blackest black", acknowledges Hamburg’s Professor Karl Schulte.
Due to its unique material characteristics, Aerographite could fit onto the electrodes of lithium-ion batteries. In that case, only a minimal amount of battery electrolyte would be necessary, leading to a reduction in the battery’s weight. This purpose was outlined by the authors in a recently published article. Areas of application for these small batteries might be electric cars or e-bikes. Thus, the material would contribute to the development of greener transport.

According to the scientists, further areas of application could be the electrical conductivity of synthetic materials. Non-conductive plastic could be transformed, without causing it to gain weight. Components for aviation and satellites would benefit, since these vehicles have to endure very high amounts of vibration. The material could be a promising aid in water purification. It might act as an adsorbent for persistent water pollutants, as it could oxidise or decompose and remove these.

aerographite

WORDS AND SYNOYMS USED FOR WRITTEN TEST CONDUCTED BY MNC'S ON SOFT


                        Word                                            Synonym
about
Approximately
abstract
Summary
to accomplish
to achieve
to accumulate
to build up
to administer
to manage
to admit
to confess
Almost
Nearly
animated
Lively
to annoy
to irritate, to bother
to answer
to reply
Anyway
Besides
apparent
Obvious
to appear
to seem
applicable
Relevant
appreciable
Considerable
Ardour
Passion
Arise
Occur
Aromatic
Fragrant
to arrive
to reach
Artful
Crafty
association
Organization
to assure
to guarantee
attractive
Appealing
Away
Absent
Awful
Terrible
backbone
Spine
Backside
behind, bottom
bad (not good)
poor, naughty
Ballot
Poll
to bear on sth.
to affect
to beat
to defeat
becoming
Fitting
to begin
to start
to behave
to act
believable
Plausible
Belly
Stomach
Bendy
Flexible
beneficent
Generous
beneficial
Favourable
Bid
Tender
Bizarre
Weird
blameless
Innocent
bloodbath
Massacre
bloodless
Cold
Branch
Department
Brave
Courageous
to bring sth. back
to reintroduce
to bring sth. on
to cause
to bring sb. up
to raise
Brow
Forehead
Bum
backside, behind, bottom
Business
commerce, trade
busy (telephone)
Engaged
candy
Sweet
to categorize
to categorise (BE)
to classify
charter
Constitution
cheesy
corny, tacky
chiefly
Mainly
choosy
Picky
to chop
to cut
chorus
Refrain
citation
Quotation
to cite
to quote
class
lesson, course
clerk
Receptionist
clever
Intelligent
to close
to shut
coiffure
Hairstyle
to collapse
to break down
to collect
to gather
comfort
Consolation
comic
Comedian
commencement
Graduation
complete
Total
completely
Totally
concord
Harmony
to condemn
to sentence
confederate
Accomplice
to confine
to restrict
conflict
Clash
to conform
to comply
to confuse
to mix up
to connect
to associate, to put through (telephone)
considerate
Thoughtful
constancy
Fidelity
constant
Fixed
constitution
Structure
construction (lit.)
Interpretation
to consult
to refer to
contemporary
Modern
continuous
Continual
contrary
Opposite
convention
Conference
to convey
to communicate
to cope
to manage
correct
Right
couch
Sofa
crook
Criminal
crusade
Campaign
cube
Dice
curative
Healing
curler
Roller
cussed
Stubborn
dash
Sprint
daybreak
Dawn
deceptive
Misleading
decontrol
Deregulate
dedicated
Committed
to deduce
to infer
defective
Faulty
deliberate
Planned
deliberately
Intentionally
delicate
Fragile
to demonstrate
to protest
to denationalize
to denationalise (BE)
to privatize
Denims
Jeans
to denote
to indicate, to represent
to deprave
to corrupt
Depraved
wicked, evil
to desert
to abandon
Deserted
Abandoned
Destiny
Fate
Detached
Indifferent
Devil
Satan
Dicy
risky
to differentiate
to distinguish
to diminish
to decrease
Disadvantaged
deprived
Disagreeable
unpleasant
to disappear
to vanish
Disaster
catastrophe
to disclaim
to deny
to disclose
to reveal
Discount
reduction
Disgrace
shame
Domesticate
cultivate
Dossier
file
Dubious
doubtful
dull (person)
stupid
Eager
keen
Earth
soil
Economic
profitable
Egocentric
selfish
to elevate
to raise, to promote
to emphasise
to emphasize
to stress
to encounter
to come across
Enormous
huge, immense
to enquire
to investigate
Equity
fairness
Especially
Particularly
Essential
Fundamental
to establish
to set up
to evaluate
to assess
Everlasting
Eternal
Exactly
Precisely
Except
apart from
to expire
to run out
to explode
to blow up
Extra
Additional
to fabricate
to manufacture
Famous
famed, renowned
Fanatic
Enthusiast
Fantastic
great, brilliant
to float
to drift
Fool
Idiot
Foolish
Silly
Forehead
Brow
to foretell
to predict
Formerly
Previously
Fortunate
Lucky
Foxy
Cunning
Foyer
Lobby
Fragrance
Perfume
French dressing
Vinaigrette
to function
to operate

Garbage
rubbish
garbage can (AE)
trashcan (AE)
Gay
homosexual
to glitter
to sparkle
to grab
to seize
Grasping
greedy
Gratis
free of charge
Gratuity
Tip
Gravestone
headstone
to grouse
to grumble
Gut
intestine
Hall
corridor
to hand sth. Out
to distribute
Handsome
good-looking
hang-out
haunt
Happily
fortunately
Hard
tough
Hashish
cannabis
to hawk
to peddle
to hazard
to endanger
Hearsay
rumour
Hermetic
airtight
highbrow
intellectual
hint
trace, tip
hole
Gap
home
domestic
homicide
murder
housebreaking
burglary
hunger
starvation
to hurry
to rush
hypothesis
speculation
idler
loafer
if
whether
to ignore
to disregard
illiberal
intolerant
to illuminate
to clarify; to light up
to illustrate
to demonstrate
to imagine
to suppose, to assume
to imitate
to mimic
immediate
instant
immobile
motionless
immoderate
excessive
immodest
conceited
to impact
to affect
impartial
neutral
impasse
deadlock
impassive
emotionless
to impeach
to question
impediment
obstacle
imperative
Vital
impolite
Rude
incidentally
by the way
inconsiderate
thoughtless
indisputable
undeniable
infamous
notorious
infantile
childish
to infect
to contaminate
inflexible
Rigid
inflow
Influx
informal
casual
infrequent
Rare
inheritor
Heir
innocent
harmless
insolvent
bankrupt
to inspect
to examine
instinct
intuition
instructions
directions
insufferable
unbearable
insufficient
inadequate
insupportable
intolerable
insurgent
rebel
intellectual
mental
to intend
to mean
to intensify
to heighten
interplay
Interaction
inventory
Stock
invoice
Bill
to involve
to entail
isolated
Lonely
jealous
Envious
joy
Delight
knowingly
deliberately
lacking
Missing
last
Final
leading
Main
to learn
to memorize
legitimate
valid, legal
lethal
deadly
liveable
habitable
livid
furious
loopy
Crazy
lousy
Awful
Lucid
Clear
mackintosh
waterproof coat
madness
insanity
magician
conjuror
magistrate
Justice of the Peace
to magnify
to exaggerate
to maintain
to preserve
manmade
artificial
mannequin
model
material
Fabric
matters
Things
maybe
perhaps, possibly
in the meantime
meanwhile
measure
degree
meeting
assembly
mendacity
Lying
merciless
Cruel
middleman
intermediary
midway
halfway
to migrate
emigrate
mild
Gentle
to mimic
to imitate
mind
intellect
mindless
senseless
to minimize
to play down
to mirror
to reflect
to misconceive
to misunderstand
miserable
depressing
misery
distress
misread
misinterpret
missing
Lost
mistrust
distrust
mo (AE)
moment
moderately
reasonably
modern
contemporary
more and more
increasingly
moreover
in addition
movie
Film
murderer
assassin
naked
Bare
nameless
anonymous
napkin
Serviette
to narrate
to relate
a narrative
a story
a native
a local
to near
to approach
necessary
Essential
nightfall
Dusk
nobility
the Aristocracy
to nominate
to appoint
non-stop
Continuous
noon
Midday
noted
Famous
to notify
to inform
notwithstanding
However
nugatory
Worthless
numerous
Many
obdurate
Stubborn
object
Thing
obligatory
Compulsory
oblique
Indirect
omnipotent
all-powerful
obsolete
out of date
off-season
low season
to operate
to function
organic
Biological
ornament
Decoration
outside
External
to overhaul
to overtake
to overlook
to miss
overseas
Abroad
to oversee
to supervise
painting
Portray
paper money
Notes
particular
Specific
passable
Satisfactory
pattern
Sample
peaceable
Peaceful
perception
Insight
phantasm
Illusion
pocket book
Notebook
poisonous
Toxic
possibility
Opportunity
post-mortem
Autopsy
practically
Virtually
praise
Compliment
precedence
Priority
precept
Principle
Precise
Summary
pressing
Urgent
previous
Preceding
Priority
Precedence
Prompt
Immediate
prosperous
Affluent
to provide
to supply
provided
If
to put sth. back
to postpone
to quake
to tremble
Quite
Fairly
reasonable
Fair
to receive
to get
Refrain
Chorus
Reliable
Dependable
religious
Devout
remainder
the rest
Remark
Comment
reminiscence
Memory
remorse
Regret
Remote
Isolated
removable
Detachable
to renew
to resume
to renounce
to give up
Repute
Reputation
to respond
to reply
revolting
Disgusting
Rubbish
Nonsense
Rude
Impolite
to rue
to regret
Sacristy
Vestry
satisfied
Convinced
Scarcity
Shortage
scrumptious
Delicious
Second
Moment
to select
to choose
selection
Choice
self-assured
Confident
Signal
Sign
significant
Meaningful
Silly
Foolish
Sincere
Honest
Skull
Cranium
Soiled
Dirty
spotlight
Highlight
Stable
Steady
Steady
Regular
Stupid
Silly
substantially
Considerably
suggest
Propose
sundown
Sunset
Sunrise
Dawn
Sure
Certain
surroundings
Environment
to survive
to outlive
to symbolize
to represent
Tailored
tailor-made
Temper
Mood
Terror
Terrorism
testament
Testimony
Today
Nowadays
Torpid
Lethargic
touchdown
Landing
Touchy
Sensitive
to transform
to convert
transitory
Temporary
transparent
Obvious
trustworthy
Reliable
Twister
Tornado
twosome
Pair
ultimate
Final
uncared for
Neglected
uncommon
Unusual
uncooked
Raw
undeniable
Indisputable
understandable
Comprehensible
unforeseen
Unexpected
unfortunate
Unlucky
Unhurt
Unharmed
uninjured
Unhurt
unlawful
Illegal
unmarried
Single
unstated
Unspoken
untimely
Premature
Untrue
Unfaithful
unusual
Strange
unvoiced
Voiceless
Uprising
Rebellion
Usually
generally, normally
vacancy
Emptiness
to vacuum
to hoover
Vague
Indistinct
Vain
Useless
valueless
Worthless
to vanquish
to conquer
to vary
to differ
Vast
Huge
Virtue
Advantage
to visualize
to imagine
warranty
Guarantee
well mannered
Polite
well timed
Timely
Winery
Vineyard
to withstand
to resist
Zenith
Peak