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READING PASSAGE 1
You should spend about 20 minutes on Questions 1-13, which are based on Reading
Passage 1 on the following pages.

Morse Code
Morse code is being replaced by a new satellite-based system for sending dis-tress
calls at sea. Its dots and dashes have had a good run for their money.

A "Calling all. This is our last cry before our eternal silence.” Surprisingly this message,
which flashed over the airwaves in the dots and dashes of Morse code on January 31st
1997, was not a desperate transmission by a radio operator on a sinking ship. Rather, it
was a message signal-ling the end of the use of Morse code for distress calls in French
waters. Since 1992 countries around the world have been decommissioning their Morse
equipment with similar (if less poetic) sign-offs, as the world's shipping switches over to
a new satellite-based arrangement, the Global Maritime Distress and Safety
System. The final deadline for the switch-over to GMDSS is February 1st, a date that is
widely seen as the end of art era.

B The code has, however, had a good history. Appropriately for a technology commonly
associ-ated with radio operators on sinking ships, the idea of Morse code is said to have
occurred to Samuel Morse while he was on board a ship crossing the Atlantic, At the
time Morse Was a painter and occasional inventor, but when another of the ships
passengers informed him of recent advances in electrical theory, Morse was suddenly
taken with the idea of building an electric telegraph to send messages in codes.Other
inventors had been trying to do just that for the best part of a century. Morse succeeded
and is now remembered as "the father of the tele-graph" partly thanks to his single-
mindedness—it was 12 years, for example, before he secured money from Congress to
build his first telegraph line—but also for technical reasons.

C Compared with rival electric telegraph designs, such as the needle telegraph
developed by William Cooke and Charles Wheatstone in Britain, Morses design was
very simple: it required little more than a "key” (essentially, a spring-loaded switch) to
send messages, a clicking “sounder" to receive them, and a wire to link the two. But
although Morses hardware was simple, there was a catch: in order to use his
equipment, operators had to learn the special code of dots and dashes that still
bears his name. Originally, Morse had not intended to use combinations of dots and
dashes to represent individual letters. His first code, sketched in his notebook during
that transatlantic voyage, used dots and dashes to represent the digits 0 to 9. Morses
idea was that messages would consist of strings of numbers corresponding to words
and phrases in a special numbered dictionary. But Morse later abandoned this scheme

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and, with the help of an associate, Alfred Vail, devised the Morse alphabet, which could
be used to spell out messages a letter at a time in dots and dashes.

D At first, the need to learn this complicated-looking code made Morses telegraph seem
impossibly tricky compared with other, more user-friendly designs, Cookes and
Wheatstones telegraph, for example, used five needles to pick out letters on a diamond-
shaped grid. But although this meant that anyone could use it, it also required five wires
between telegraph stations. Morses telegraph needed only one. And some people, it
soon transpired, had a natural facility for Morse code.

E As electric telegraphy took off in the early 1850s, the Morse telegraph quickly became
domi-nant. It was adopted as the European standard in 1851, allowing direct
connections between the telegraph networks of different countries. (Britain chose not to
participate, sticking with needle telegraphs for a few more years.) By this time Morse
code had been revised to allow for accents and other foreign characters, resulting in a
split between American and International Morse that continues to this day.

F On international submarine cables, left and right swings of a light-beam reflected from
a tiny rotating mirror were used to represent dots and dashes. Meanwhile a distinct
telegraphic sub-culture was emerging, with its own customs and vocabulary, and a
hierarchy based on the speed at which operators could send and receive Morse code.
First-class operators, who could send and receive at speeds of up to 45 words a minute,
handled press traffic, securing the best-paid jobs in big cities. At the bottom of the pile
were slow, inexperienced rural operators, many of whom worked the wires as part-
timers. As their Morse code improved, however, rural opera-tors found that their new-
found skill was a passport to better pay in a city job.Telegraphers soon, swelled the
ranks of the emerging middle classes. Telegraphy was also deemed suitable work for
women. By 1870, a third of the operators in the Western Union office in New York, the
largest telegraph office in America, were female.

G In a dramatic ceremony in 1871, Morse himself said goodbye to the global community
of telegraphers he had brought into being. After a lavish banquet and many adulatory
speeches, Morse sat down behind an operators table and, placing his finger on a key
connected to every telegraph wire in America, tapped out his final farewell to a standing
ovation. By the time of his death in 1872, the world was well and truly wired: more than
650,000 miles of telegraph line and 30,000 miles of submarine cable were throbbing
with Morse code; and 20,000 towns and villages were connected to the global
network. Just as the Internet is today often called an "information superhighway”, the
telegraph was described in its day as an “instantaneous highway of thought",

H But by the 1890s the Morse telegraph's heyday as a cutting-edge technology was
coming to an end, with the invention of the telephone and the rise of automatic
telegraphs, precursors of the teleprinter, neither of which required specialist skills to
operate. Morse code, however, was about to be given a new lease of life thanks to
another new technology: wireless. Following the invention of radiotelegraphy by
Guglielmo Marconi in 1896, its potential for use at sea quickly became apparent. For the

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first time, ships could communicate with each other, and with the shore, whatever the
weather and even when out of visual range. In 1897 Marconi successfully sent Morse
code messages between a shore station and an Italian warship 19km (12 miles) away.
By 1910, Morse radio equipment was commonplace on ships.

READING PASSAGE 2
You should spend about 20 minutes on Questions 14-26, which are based on Reading
Passage 2 below.

From A Novice to An Expert

Expertise is commitment coupled with creativity. Specifically, it is the commitment of
time, energy, and resources to a relatively narrow field of study and the creative energy
necessary to generate new knowledge in that field. It takes a considerable amount of
time and regular exposure to a large number of cases to become an expert.

An individual enters a field of study as a novice. The novice needs to learn the guiding
prin-ciples and rules of a given task in order lo perform that task. Concurrently, the
novice needs to he exposed fo specific cases, or instances, that lest the boundaries of
such principles. Gen-erally, a novice will find a mentor to guide her through the process
of acquiring new knowl-edge. A fairly simple example would he someone learning lo
play chess. The novice chess player seeks a mentor to leach her the object of the
game, the number of spaces, the names of the pieces, the function of each piece, how
each piece is moved, and the necessary condi-tions for winning, or losing the game.

In lime, and with much practice, the novice begins to recognise patterns of behavior
within cases and, thus, becomes a journeyman. With more practice and exposure to
increasingly complex cases, The journeyman finds patterns not only within cases but
also between cases. More importantly, the journeyman learns that these patterns often
repeat themselves over time. The journeyman still maintains regular contact with a
mentor to solve specific prob-lems and learn more complex strategies. Returning to the
example of the chess player, the individual begins to learn patterns of opening moves,
offensive and defensive game-playing, strategies, and patterns of victory and defeat.

When a journeyman starts to make and test hypotheses about future behavior based on
past experiences, she begins the next transition. Once she creatively generates
knowledge, rather than simply matching, superficial patterns, she becomes an expert.
At this point, she is confi-dent in her knowledge and no longer needs a mentor as a
guide she becomes responsible for her own knowledge. In the chess example, once a
journeyman begins competing against experts, makes predictions based on patterns,

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and tests those predictions against actual behavior, she is generating new knowledge
and a deeper understanding of the game. She is creating her own case, rather than
relying on the cases of others.

The Power of Expertise

An expert perceives meaningful patterns in her domain better than non-experts. Where
a novice perceives random or disconnected data points, an expert connects regular
patterns within and between cases. This ability to identify patterns is not an innate
perceptual skill; rather it reflects the organisation of knowledge after exposure to and
experience with thou-sands of cases.

Experts have a deeper understanding of their domains than novices do, and utilise
higher-order principles to solve- problems. A novice, for example, might group objects
together by color or size, whereas an expert would group the same objects according to
their function or utility. Experts comprehend the meaning of data and weigh variables
with different criteria within their domains belter than novices. Experts recognise
variables that have the largest influence on a particular problem and focus their
attention on those variables.

Experts have better domain-specific short-term and long-term memory than novices
do. Moreover, experts perform tasks in their domains faster than novices and commit
fewer errors while problem solving. Interestingly, experts go about solving problems
differently than novices. Experts spend more time thinking, about a problem to fully
understand it at the beginning of a task than do novices, who immediately seek to find a
solution, Experts use their knowledge of previous cases as context tor creating mental
models to solve given problems.

Better at self-monitoring than novices, experts are more aware of instances where they
have committed errors or failed to understand a problem. Experts check their solution
more often than novices and recognise when they are missing, information necessary
for solving a problem. Experts are aware of the limits of their domain knowledgeand
apply their domain's heuristics to solve problems that fall outside of their experience
base.

The Paradox of Expertise

The strengths of expertise can also be weaknesses. Although one would expect experts
to be good forecasters, they are not particularly good at making predictions about the
future. Since the 1930s, researchers have been testing, the ability of experts to make
forecasts. The performance of experts has been tested against actuarial tables to
determine if they are better at making predictions than simple statistical models.
Seventy years later, with more than two hundred experiments in different domains, it is
clear that the answer is no. If sup-plied with an equal amount of data about a particular
case, an actuarial table is as good, or better, than an expert at making, calls about the

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future. Even if an expert is given more spe-cific case information than is available to the
statistical model, the expert does not tend to outperform the actuarial table.

Theorists and researchers differ when trying, to explain why experts are less accurate
fore-casters than statistical models. Some have argued that experts, like all humans,
are inconsis-tent when using mental models to make predictions. That is, the model an
expert uses for predicting X in one month is different from the model used for predicting
X in a following, month, although precisely the same case and same data set are used
in both instances.

A number of researchers point to human biases to explain unreliable expert

predictions. During, the last 30 years, researchers have categorised, experimented, and
theorised about the cognitive aspects of forecasting. Despite such efforts, the literature
shows little consen-sus regarding the causes or manifestations of human bias.

READING PASSAGE 3
You should spend about 20 minutes on Questions 27-40, which are based on Reading
Passage 3 below.

High speed photography

A Photography gained the interest of many scientists and artists from its inception.
Scientists have used photography to record and study movements, such as Eadweard
Muybridge’s study of human and animal locomotion in 1887. Artists are equally
interested by these aspects but also try to explore avenues other than the photo-
mechanical representation of reality, such as the pictorialist movement. Military, police,
and security forces use photography for surveil-lance, recognition and data storage.
Photography is used by amateurs to preserve memories, to capture special moments,
to tell stories, to send messages, and as a source of entertainment. Various
technological improvements and techniques have even allowed for visualising
events that are too fast or too slow for the human eye.

B One of such techniques is called fast motion or professionally known as time-lapse.

Time-lapse photography is the perfect technique for capturing events and movements in
the natural world that occur over a timescale too slow for human perception to
follow. The life cycle of a mushroom, for example, is incredibly subtle to the human eye.
To present its growth in front of audiences, the principle applied is a simple one: a
series of photographs are taken and used in sequence to make a moving-image film,
but since each frame is taken with a lapse at a time interval between each shot, when
played back at normal speed, a continuous action is produced and it appears to speed
up. Put simply: we are shrinking time. Objects and events that: would normally take

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several minutes, days or even months can be viewed to completion in seconds having
been sped up by factors of tens to millions.

C Another commonly used technique is high-speed photography, the science of taking

pictures of very fast phenomena. High-speed photography can be considered to be the
opposite of time-lapse photography. One of the many applications is found in biology
studies to study birds, bats and even spider silk. Imagine a hummingbird hovering
almost completely still in the air, feeding on nectar. With every flap, its wings bend, flex
and change shape. These subtle movements precisely control the lift its wings
generate, making it an excellent hoverer. But a hummingbird flaps its wings up to 80
times every second. The only way to truly capture this motion is with cameras that will,
in effect, slow down time. To do this, a greater length of film is taken at a high sampling
frequency or frame rate, which is much faster than it will be projected on screen. When
replayed at normal speed, time appears to be slowed down proportionately. That is why
high-speed cameras have become such a mainstay of biology.

D In common usage, high-speed photography can also refer to the use of high-speed
cameras that the photograph itself may be taken in a way as to appear to freeze the
motion, especially to reduce motion blur. It requires a sensor with good sensitivity and
either a very good shut-tering system or a very fast strobe light. The recent National
Geographic footage—captured last summer during an intensive three-day shoot at the
Cincinnati Zoo—is unprecedented in its clarity and detail. “I’ve watched cheetahs run for
30 years,” said Cathryn Milker, founder of the zoo’s Cat Ambassador Program. “But I
saw things in that super slow-motion video that I’ve never seen before.” The slow-
motion video is entrancing. Every part of the sprinting cat’s anatomy—supple limbs,
rippling muscles, hyperflexible spine—works together in a sym-phony of speed,
revealing the fluid grace of the world’s fastest land animal.

E But things can’t get any more complicated in the case of filming a frog catching its
prey. Frogs can snatch up prey in a few thousandths of a second—striking out with
elastic tongues. Biologists would love to see how a frog’s tongue roll out, adhere to
prey, and roll back into the frog’s mouth. But this all happened too fast, 50 times faster
than an eye blink. So natu-rally people thought of using high-speed camera to capture
this fantastic movement in slow motion. Yet one problem still remains—viewers would
be bored if they watch the frog swim in slow motion for too long. So how to skip this?
The solution is a simple one—adjust the playback speed, which is also called by some
the film speed adjustment. The film will origi-nally be shot at a high frame (often 300
frames per second, because it can be converted to much lower frame rates without
major issues), but at later editing stage this high frame rate will only be preserved for
the prey catching part, while the swimming part will be converted to the normal speed at
24 frames per second. Voila, the scientists can now sit back and enjoy watching without
having to go through the pain of waiting.

F Sometimes taking a good picture or shooting a good film is not all about technology,
but patience, like in the case of bat. Bats are small, dark-colored; they fly fast and are
active only at night. To capture bats on film, one must use some type of camera-tripping

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device. Photog-raphers or film-makers often place camera near the bat cave, on the
path of the flying bats. The camera must be hard-wired with a tripping device so that
every time a bat breaks the tripping beam the camera fires and it will keep doing so
through the night until the camera’s battery runs out. Though highly-advanced tripping
device can now allow for unmanned shooting, it still may take several nights to get a
truly high quality film.

G Is it science? Is it art? Since the technique was first pioneered around two hundred
years ago, photography has developed to a state where it is almost unrecognisable.
Some people would even say the future of photography will be nothing like how we
imagine it. No matter what future it may hold, photography will continue to develop as it
has been repeatedly demon-strated in many aspects of our life that “a picture is worth a
thousand words.”

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