|
Recently, the media has spent an increasing amount of broadcast time on new
technology. The focus of high-tech media has been aimed at the flurry of
advances concerning artificial intelligence (AI). What is artificial
intelligence and what is the media talking about? Are these technologies
beneficial to our society or mere novelties among business and marketing
professionals? Medical facilities, police departments, and manufacturing
plants have all been changed by AI but how? These questions and many others
are the concern of the general public brought about by the lack of education
concerning rapidly advancing computer technology.
Artificial intelligence is defined as the ability of a machine to think for
itself. Scientists and theorists continue to debate if computers will actually
be able to think for themselves at one point (Patterson 7). The generally
accepted theory is that computers do and will think more in the future. AI has
grown rapidly in the last ten years chiefly because of the advances in
computer architecture. The term artificial intelligence was actually coined in
1956 by a group of scientists having their first meeting on the topic
(Patterson 6). Early attempts at AI were neural networks modeled after the
ones in the human brain. Success was minimal at best because of the lack of
computer technology needed to calculate such large equations.
AI is achieved using a number of different methods. The more popular
implementations comprise neural networks, chaos engineering, fuzzy logic,
knowledge based systems, and expert systems. Using any one of the
aforementioned design structures requires a specialized computer system. For
example, Anderson Consulting applies a knowledge based system to commercial
loan officers using multimedia (Hedburg 121). Their system requires a fast IBM
desktop computer. Other systems may require even more horsepower using exotic
computers or workstations. Even more exotic is the software that is used.
Since there are very few applications that are pre-written using AI, each
company has to write it’s own software for the solution to the problem. An
easier way around this obstacle is to design an add-on. The company FuziWare
makes several applications that act as an addition to a larger application.
FuziCalc, FuziQuote, FuziCell, FuziChoice, and FuziCost are all products that
are use! d as management decision support systems for other off-the shelf
applications (Barron 111).
In order to tell that AI is present we must be able to measure the
intelligence being used. For a relative scale of reference, large
supercomputers can only create a brain the size of a fly (Butler and Caudill
5). It is surprising what a computer can do with that intelligence once it has
been put to work. Almost any scientific, business, or financial profession can
benefit greatly from AI. The ability of the computer to analyze variables
provides a great advantage to these fields. There are many ways that AI can be
used to solve a problem. Virtually all of these methods require special
hardware and software to use them. Unfortunately, that makes AI systems
expensive. Consulting firms, companies that design computing solutions for
their clients, have offset that cost with the quality of the system. Many new
AI systems now give a special edge that is needed to beat the competition.
Neural networks have entered the spotlight with surprisingly successful
results. A neural network is a type of information processing system whose
architecture is similar to the structure of biological neural systems (Butler
and Caudill 5). The neural network tries to mimic the way a brain and nervous
system work by analyzing sensory inputs and calculating an outcome. A neural
network is usually composed of simple decision making elements that are
connected with variable weights and strengths. Each one these elements is
called a neurode. The term neurode is similar to the biological neuron. The
term was modified slightly to indicate an artificial nature. Memory is stored
by a certain pattern of the connection weights between the neurodes.
Processing information is performed by changing and spreading the connection’s
weights among the network. Before it can be used a neural network must be
trained. Some can learn by themselves, some require training by doing, and
oth! ers learn by trial and error. A computer learns by naturally associating
items the computer is taught and grouping them together physically.
Additionally, a computer can retrieve stored information from incomplete or
partially incorrect clues. Neural networks are able to generalize categories
based on specifics of the contents. Lastly, it is highly fault tolerant. This
means that the network can sustain a large amount of damage and still
function. Its performance fades proportionally as the neurodes disappear
(Butler and Caudill 8). This type of system is inherently an excellent design
for any application that requires little human intervention and that must
learn on the go.
Created by Lotfi Zadeh almost thirty years ago, fuzzy logic is a mathematical
system that deals with imprecise descriptions, such as "new", "nice", or
"large" (Schmuller 14). This concept was also inspired from biological roots.
The inherent vagueness in everyday life motivates fuzzy logic systems
(Schmuller 8). In contrast to the usual yes and no answers, this type of
system can distinguish the shades in-between. In Los Angeles a fuzzy logic
system is used to analyze input from several cameras located at different
intersections (Barron 114). This system provides a "smart light" that can
decide whether a traffic light should be changed more often or remain green
longer. In order for these "smart lights" to work the system assigns a value
to an input and analyzes all the inputs at once. Those inputs that have the
highest value get the highest amount of attention. For example, here is how a
fuzzy logic system might evaluate water temperature. If the water is cold, it
ass! igns a value of zero. If it is hot the system will assign the value of
one. But if the next sample is lukewarm it has the capability to decide upon a
value of 0.6 (Schmuller 14). The varying degrees of warmness or coldness are
shown through the values assigned to it. Fuzzy logic’s structure allows it to
easily rate any input and decide upon the importance. Moreover, fuzzy logic
lends itself to multiple operations at once.
Fuzzy logic’s ability to do multiple operations allows it to be integrated
into neural networks. Two very powerful intelligent structures make for an
extremely useful product. This integration takes the pros of fuzzy logic and
neural networks and eliminates the cons of both systems (Liebowitz 113). This
new system is a now a neural network with the ability to learn using fuzzy
logic instead of hard concrete facts. Allowing a more fuzzy input to be used
in the neural network instead of being passed up will greatly decrease the
learning time of such a network.
Another promising arena of AI is chaos engineering. The chaos theory is the
cutting-edge mathematical discipline aimed at making sense of the ineffable
and finding order among seemingly random events (Weiss 138). Chaologists are
experimenting with Wall Street where they are hardly receiving a warm welcome.
Nevertheless, chaos engineering has already proven itself and will be present
for the foreseeable future. The theory came to life in 1963 at the
Massachusetts Institute of Technology. Edward Lorenz, who was frustrated with
weather predictions noted that they were inaccurate because of the tiny
variations in the data. Over time he noticed that these variations were
magnified as time continued. His work went unnoticed until 1975 when James
Yorke detailed the findings to American Mathematical Monthly. Yorke’s work was
the foundation of the modern chaos theory (Weiss 139). The theory is put into
practice by using mathematics to model complex natural phenomena.
The chaos theory is used to construct portfolio’s of long and short positions
in the stock market on Wall Street. This is used to assess market risk
accurately, not to predict the future (Weiss 139). Unfortunately, the hard
part is putting the theory into practice. It has yet to impress the people
that really count: financial officers, corporate treasurers, etc. It is quite
understandable though, who is willing to sink money into a system that they
cannot understand? Until a track record is set for chaos most will be
unwilling to try, but to get the track record someone has to try it, it’s what
is known as the "catch-22." The chaos theory can be useful in other places as
well. Kazuyuki Aihara, an engineering professor at Tokyo’s Denki University,
claims that chaos engineering can be applied to analyzing heart patients. The
pattern of beating hearth changes slightly and each person pattern is
different (Ono 41). Considering this discovery a dataprocessing company in J!
apan has marketed a physical checkup system that uses chaos engineering. This
system measures health and psychological condition by monitoring changes in
circulation at the fingertip (Ono 41). Aihara admits that chaos-engineering
has tremendous potential but does have limitations. He states, "It can predict
the future more accurately than any other system but that doesn’t mean it can
predict the future all the time." Along these lines Rabi Satter, a computer
consultant with a BS in Computer Science, believes that the current sentiment
that the world is rational and can be reduced to mathematical equations is
wrong. "In order to make great strides in this arena [AI] we need new
approaches informed by the past but not guided by it. A fresh voice if you
would. As one person said we are using brute force to solve the problem"
states Satter.
A few more implementations of artificial intelligence include knowledge-based
systems, expert systems, and case-based reasoning. All of these are relatively
similar because they all use a fixed set of rules. Knowledge-based systems
(KBS) are systems that depend on a large base of knowledge to perform
difficult tasks (Patterson 13). KBS get their information from expert
knowledge that has been programmed into facts, rules, heuristics and
procedures. However, the power of a knowledge-based system is only as good as
the knowledge given to it. Therefore, the knowledge section is usually
separate from the control system and can be updated independently. This
enables system updates and additional information to be added in a more
efficient manner then making a whole new system from scratch (O’Shea 162).
Expert systems have proven effective in a number of problem domains that
usually require human intelligence (Patterson 326). They were developed in the
research labs of universities in the 1960’s and 1970’s. Expert systems are
primarily used as specialized problem solvers. The areas that this can cover
are almost endless. This can include law, chemistry, biology, engineering,
manufacturing, aerospace, military operations, finance, banking, meteorology,
geology, and more. Expert systems use knowledge instead of data to control the
solution process. "In knowledge lies the power" is a theme repeated when
building such systems. These systems are capable of explaining the answer to
the problem and why any requested knowledge was necessary. Expert systems use
symbolic representations for knowledge and perform computations through
manipulations of the different symbols (Patterson 329). But perhaps the
greatest advantage to expert systems is their ability to realize their limits
and capabilities.
Case-based reasoning (CBR) is similar to expert system because theoretically
they could use they same set of data. CBR has been proposed as a more
psychologically plausible model of the reasoning used by an expert while
expert systems use more fashionable rule-based reasoning systems (Riesbeck 9).
This type of system uses a different computational element that decides the
outcome of a given input. Instead of rules in an expert system, CBR uses cases
to evaluate each input uniquely. Each case would be matched to what a human
expert would do in a specific case. Additionally this system knows no right
answers, just those that were used in former cases to match. A case library is
set up and each decision is stored. The input question is characterized to
appropriate features that are recognizable and is matched to a similar past
problem and its solution is then applied. Now that each type of implementation
of AI has been discussed, how do we use all this technology? Foremost, neural
networks are used mainly for internal corporate applications in various types
of problems. For example, Troy Nolen was hired by a major defense contractor
to design programs for guiding flight and battle patterns of the YF-22
fighter. His software runs on five on-board computers and makes split-second
decisions based on data from ground stations, radar, and other sources.
Additionally it predicts what the enemy planes would do, guiding the jet’s
actions consequently (Schwartz 136). Now he and many others design financial
software based on their experience with neural networks. Nolen works for
Merrill Lynch &Co. to develop software that will predict the prices of many
stocks and bonds. Murry Ruggiero also designs software, but his forecasts the
future of the Standard &Poors index. Ruggiero’s program, called BrainCel, is
capable of giving an annual return of 292%. Another major application of
neural networks is detecting credit card fraud. Mellon Bank, First Bank, and
Colonial National Bank all use neural networks that can determine the
difference between fraud and regular transactions (Bylinsky 98). Mellon Bank
states the new neural network allows them to eliminate 90% of the false alarms
that occur under traditional detection systems (Bylinsky 99).
Secondly, fuzzy logic has many applications that hit close to home. Home
appliances win most of the ground with AI enhanced washing machines, vacuum
cleaners, and air-conditioners. Hitachi and Matsushita manufacture washing
machines that automatically adjust for load size and how dirty the articles
are (Shine 57). This machine washes until clean, not just for ten minutes.
Matsushita also manufactures vacuum cleaners that adjust the suction power
according to the volume of dust and the nature of the floor. Lastly,
Mitsubishi uses fuzzy logic to slow air-conditioners gradually to the desired
temperature. The power consumption is reduced by 20% using this system
(Schmuller 27). The chaos theory is limited in scope at this time mainly
because of lack of interest and resources to experiment with. However, Wall
Street will be hearing more about it for a long time to come. Also, the
medical field has an interest because of its ability to distinguish between
natural and non-natural patterns. The chaos theory has a foot in the door, but
a breakthrough in design will have to come around first before any major moves
toward the chaos theory will happen.
Expert systems are prevalent all over the world. This proven technology has
made its way into almost everywhere that human experts live. Expert systems
even can show an employee how to be an expert in a particular occupation. A
Massachusetts company specializes in teaching good judgment to new employees
or trainees. Called Wisdom Simulators, this company sells software that
simulates nasty job situations in the business world. The ability to learn
before the need arises attracts many customers to this type of software (Nadis
8). Expert systems have also been applied in medical facilities, diagnosis of
mechanical devices, planning scientific experiments, military operations, and
teaching students specialized tasks. Knowledge-based systems and case-based
reasoning will be on the rise for a long time to come. These systems are
souped-up expert systems that provide more powerful searching and
decision-making strategies. KBS is finding its home at help desks by working
with telephone operators to direct calls. CBR will have close ties to law with
its ability to use past precedents to determine a sentence and prison term.
KBS is already being used by the Tennessee Department of Corrections for
determining which inmates are eligible for parole (Peterson 37). Making
recommendations on which AI systems work the best almost requires AI itself.
However, I believe that some are definitely better than others. Neural
networks, unfortunately, have performance spectrums that continue to dwell at
both extremes. While there are some very good networks that perform their
designed task beautifully, there are others that perform miserably.
Furthermore, these networks require massive amounts of computing resources
that restrict their use to those who can afford it. On the other hand, fuzzy
logic is practically a win-win situation. Although some are rather simple,
these systems perform their duties quickly and accurately without expensive
equipment. They can easily replace many mundane tasks that others computer
systems would have trouble with. Fuzzy logic has enabled computers to
calculate such terms as "large" or "several" that would not be possible
without it (Schmuller 14). On the other hand, the chaos theory has potential
for handli! ng an infinite amount of variables. This gives it the ability to
be a huge success in the financial world. It’s high learning curve and its
primitive nature, however, limits it to testing purposes only for the time
being. It will be a rocky road for chaos theory and chaos engineering for
several years. Finally, expert systems, knowledge-based systems, and
cased-based reasoning systems are here to stay for a long time. They provide
an efficient, easy to use program that yields results that no one can argue
with. Designed correctly, they are can be easily updated and modernized.
While the massive surge into the information age has ushered some old
practices out of style, the better ones have taken over with great success.
The rate of advancement may seem fast to the average person, but the
technology is being put to good use and is not out of control. A little time
to experiment with the forefront technologies and society will be rewarded
with big pay-offs. Soon there will be no place uncharted and no stone
unturned. Computers are the future in the world and we should learn to welcome
their benefits and improve their shortcomings to enrich the lives of the
world.
Science Essays
|
