Section 2
Computer Provides More Questions
Than Answers
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A
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The
island of Antikythera lies 18 miles north of Crete, where the Aegean Sea
meets the Mediterranean. Currents there can
make shipping treacherous and one ship bound for ancient
Rome never made it. The ship that sank there was a giant cargo vessel
measuring nearly 500 feet long. It came to rest
about 200 feet below the surface, where it stayed for more than 2,000 years until divers
looking for sponges discovered the wreck a little more than a century ago.
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B
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Inside
the hull were a number of bronze and marble statues. From the look of
things, the ship seemed to be carrying luxury items, probably made in
various Greek islands and bound for wealthy
patrons in the growing Roman Empire. The statues were retrieved, along with
a lot of other unimportant stuff, and stored. Nine months later, an
enterprising archaeologist cleared off a layer of organic material from one
of the pieces of junk and found that it looked like a gearwheel. It had
inscriptions in Greek characters and seemed to have something to do with
astronomy.
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C
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That
piece of “Junk” went on to become the most celebrated find from the
shipwreck; it is displayed
at the National Archaeological Museum of Athens. Research has shown that the wheel was part of a device so
sophisticated that its complexity would not be matched for a thousand years — it was also
the world's first known analog computer. The device is
so famous that an international conference organized in Athens a couple of
weeks ago had only one subject: the Antikythera
Mechanism.
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D
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Every
discovery about the device has raised new questions. Who built the device,
and for what purpose? Why did the
technology behind it disappear for the next thousand years? What does the device tell us
about ancient Greek culture? And does the marvellous construction, and the precise
knowledge of the movement of the sun and moon and Earth that it implies, tell us how the
ancients grappled with ideas about determinism and human destiny?
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E
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"We
have gear trains from the 9th century in Baghdad used for simpler displays
of the solar and lunar motions relative to
one another — they use eight gears,’ said Frangois Charette,
a historian of science in Germany who wrote an editorial accompanying a new study of the mechanism two weeks ago
in the journal Nature. “In this case, we have more than
30 gears. To see it on a computer animation makes it mind-boggling. There
is no doubt it was a technological
masterpiece."
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F
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The device
was probably built between 100 and 140 BC, and the understanding of astronomy it displays seems to have
been based on knowledge developed by the Babylonians
around 300-700 BC, said Mike Edmunds, a professor of astrophysics at Cardiff University in Britain. He led
a research team that reconstructed what the gear mechanism
would have looked like by using advanced three- dimensional-imaging technology. The group also decoded a
number of the inscriptions. The mechanism explores
the relationship between lunar months __ the time it takes for the moon to
cycle through its phases, say,
full moon to full moon -and calendar years. The gears had to be cut
precisely to reflect this complex relationship; 19 calendar years equal 235
lunar months.
|
G
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By
turning the gear mechanism, which included what Edmunds called a beautiful system of epicyclic gears that
factored in the elliptical orbit of the moon, a person could check what the sky would have looked
like on a date in the past, or how it would appear in
the future. The mechanism was encased in a box with doors in front and back
covered with inscriptions -- a sort of
instruction manual. Inside the front door were pointers indicating the date and the position
of the sun, moon and zodiac, while opening the back door
revealed the relationship between calendar years and lunar months, and a mechanism to predict eclipses.
|
H
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"If they
needed to know when eclipses would occur, and this related to the rising
and setting of stars and related them to
dates and religious experiences, the mechanism would
directly help’ said Yanis Bitsakis, a physicist at
the University of Athens who cowrote the Nature paper. “It
is a mechanical computer. You turn the handle and you have a date on the front.” Building it
would have been expensive and required the interaction of astronomer, engineers,
intellectuals and craftspeople. Charette said the device overturned conventional ideas that
the ancient Greeks were primarily ivory tower thinkers who did not deign to muddy their
hands with technical stuff. It is a reminder, he said, that while the study of history often
focuses on written texts, they can tell us only a fraction of what went on at a particular time.
|
I
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Imagine
a future historian encountering philosophy texts written in our time ~ and
an aircraft engine. The books would tell
that researcher what a few scholars were thinking today,
but the engine would give them a far better window into how technology
influenced our everyday lives. Charette said it
was unlikely that the device was used by practitioners of astrology, then still in its
infancy. More likely, he said, it was bound for a mantelpiece in some rich Roman’s home. Given that
astronomers of the time already knew how to calculate
the positions of the sun and the moon and to predict eclipses without the
device, it would have been the
equivalent of a device built for a planetarium today __ something to spur
popular interest, or at least claim bragging rights.
|
J
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Why was the
technology that went into the device lost? "The time this was built,
the jackboot of Rome was coming through,
“Edmunds said. "The Romans were good at town planning
and sanitation but were not known for their interest in science.” The fact
that the device was so complex, and that it
was being shipped with a quantity of other luxury items, tells Edmunds that it is very
unlikely to have been the on ever made. Its sophistication "is such that it can’t have been the only
one,”Edmunds said.
"There must have been a tradition
of making them. We're always hopeful a better one will surface."
Indeed, he said, he hopes that
his study and the renewed interest in the Antikythera Mechanism will prompt second looks by both amateurs
and professionals around the world. "The archaeological
world may look in their cupboards and maybe say, “That isn’t a bit of rusty old metal in the cupboard.”
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Questions 14-18
The reading
Passage has ten paragraphs A- J.
Which paragraph
contains the following information?
Write the correct
letter A-J, in boxes 14-18 on your answer sheet.
14
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Content inside the wreck ship
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15
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Ancient astronomers and craftsman might
involve
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16
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The location of Antikythera Mechanism
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17
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Details of how it was found
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18
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Appearance and structure of the mechanism
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Questions 19-22
Summary
Complete the
following summary of the paragraphs of Reading Passage, using no more than
two words from the Reading Passage for each answer. Write your answers in
boxes 19-22 on your answer sheet.
An
ancient huge sunk _______________ 19______ was found accidentally by sponges
searcher. The ship loaded with ______ 20______ such as bronze and sculptures.
However, an archaeologist found a junk similar to a_______ 21______ which has
Greek script on it. This inspiring and elaborated device was found to be
the first _______22 _______ in the world.
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Questions 23-26
Use the
information in the passage to match the people (listed A-C) with opinions or
deeds below. Write the appropriate letters A-F in boxes 23-27 on your answer
sheet.
NB you may use any
letter more than once
A
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Yanis Bitsakis
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B
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Mike Edmunds
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C
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Francois
Charette
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23
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More
complicated than previous device
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24
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Anticipate
to find more Antikythera Mechanism in the future
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25
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Antikythera
Mechanism was found related to moon
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26
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Mechanism
assisted ancient people to calculate movement of stars.
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