give man a 'new' hand
Scott wiggled a finger on his left hand a few days ago.
The feat isn't one that would usually make headlines,
but Scott is the world's second person to get a successful
- at least so far - hand transplant from a cadaver. The
37-year-old New Jersey resident underwent a 14 ½-hour
operation to receive a new left hand. He lost his in 1985
to a firecracker accident and has been using a prosthesis
until his marathon operation.
the new hand would never work like a normal one - Scott
will probably never be able to button his shirt or pick
up a penny with the new hand - doctors at the Louisville
Medical Centre say he will be able to pick up a tennis
ball or open a door. Such benefits however, come with
a price. Scott will have to take powerful anti-rejection
drugs for the rest of his life, which have potentially
widespread side effects that include high blood pressure,
increased risk of infection, diabetes, damage to the liver
and kidneys, increased risk of cancer, and hand tremors.
With such substantial risks, many have criticised the
operation, questioning whether the benefits outweigh the
Breidenbach, who led the Louisville surgical team, says
the hand transplant is an "investigational"
procedure with a 30 to 50 per cent chance of rejection
over the next year. Last September, a team of international
scientists transplanted a donor hand to a 48-year-old
Australian in a 13-hour surgery. Clint Hallam has gained
some movement in the hand. At least one attempt at a hand
transplant occurred in South America in 1964, but the
patient's body rejected the hand within two weeks.
that display your messages in the air
time you receive a message, you might not have to look
at the screen of your cell phone, as Swedish telecom giant
Nokia has launched a new phone that can display the message
in air. According to the BBC, Nokia recently unveiled
it's 3220 model which has a motion sensor that makes the
lights blink and spell out letters sequentially when the
handset is waved in the air. The messages which are written
using a row of LEDs fitted on the rear cover of Nokia's
forthcoming 3220 phone appear to float in mid-air, thanks
to a quirk of human vision which means we see the image
as a whole rather than in pieces. The messages which can
be seen from a distance of six-meters in broad daylight,
can be seen from a longer distance at night. However,
the text will have to be limited to 15 characters. Nokia
said the 3220's air messaging system could be used by
friends to talk to each other across crowded rooms or
open-air concerts. The sensor in the phone can also be
used to play games in the phone.
Blu-Ray video disk is made of paper
new type of Blu-Ray digital video-disk made largely from
paper has been developed by Sony and Toppan Printing in
Japan. The two companies say such paper-based disks will
be cheaper to make and less environmentally harmful. Blu-Ray
disks, considered a successor to conventional DVDs, store
data using a blue laser rather than a regular red one.
Because the wavelength of the blue laser is smaller, more
information can be read from this type of disk. Data is
stored on Blu-Ray disks in the form of tiny ridges on
the surface of an opaque 1.1-millimetre-thick substrate.
This lies beneath a transparent 0.1mm protective layer.
The substrate is normally made from a polycarbonate plastic,
which is ultimately derived from crude oil. But Sony and
Toppan Printing have replaced this with a mixture of paper
and another polymer.
resulting prototype consists of 51 per cent paper but
is still capable of storing up to 25 gigabytes of data.
Regular DVDs have less than half this capacity. "Oil
is a limited resource but paper can be recycled,"
said Sony spokesman Taro Takamine. "One of the initial
advantages of the paper disk will be a decrease in the
amount of raw material needed to produce a disk."
benefit of the paper-based disks is ease of disposal,
according to Hideaki Kawai, head of Toppan's R&D division
"Since a paper disk can be cut by scissors easily,
it's simple to preserve data security when disposing of
the disk," Kawai says.