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Biology
Body Fat and Modern Medical Techniques of
Defining and Predicting its presence in the human body
...Body fat and the calculation of its amount in the human
body has become one of the most widely used measurements by
various doctors. It is done to identify the patient’s weight
loss program, their food requirements, risks and other
health factors. There is a number of different techniques,
such as dual-energy x-ray absorptiometry (DXA), isotope
dilution, and air displacement plethysmography, performed in
order to study and monitor body reactions to certain
changes. These techniques are often used for research work,
but generally are too expensive, time consuming, and
impractical for use in field evaluations, gym environments
and healthcare settings (Vogel & Friedel, 1992, Swan &
McConnell, 1999). A number of field techniques solve the
problems, outlined above, and have the added benefits of
being portable, are relatively simplistic to use and are
noninvasive (Lukasaki, Bolonchuk, Hall & Siders, 1986)...
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Natural gas: its advantages as the fuel of
motor devices
...The human race is at the verge of eliminating the entire
sector of natural resources- oil. We cannot afford to be
using it in the same manner we have in the past century.
Beside the fact the we are extinguishing natural resources,
we are continuously polluting our atmosphere. Therefore the
only answer is-alternative fuels. There is a number of fuels
that could be used for cars and other motor devices instead
of the usual oil. There are hydrogen, natural gases,
electric fuel and fuel cell types of energy that we could
use. For instance electric fuel is great for the reason of
its natural pure composition thus it wont cause pollution,
however, the cost associated with it is very high. Since the
vehicle operates on electricity, the refuel time is high and
refueling is not possible in case of power interruption.
Such vehicles have lower performance than other types of
vehicles. [Alternative vehicles, n. d]...
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Human and animal communication systems:
how do they differ?
...Humans are the only creatures on the earth known to be
able to communicate using speech, in formed by air flows in
our bodies. The way we form words and sounds through a
complicated system supported in our bodies, we differ
greatly from the rest of animal world.
An interesting parallel in terms of vocalizing actions is found in
birds. The bird song is verbal and functional; part learned
and part generic, (similar to humans) marks territory and
courts a mate. There are also regional dialects in bird song
proving it is not all generic...
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Who Rules the Natural World?
...Parasites are the so called lords of the natural world,
the world that humans cannot comprehend or see by the bare
eye. A small example showing how these tiny creatures rule
the universe would be a minuscule slug that nests deep
inside the body of the crab. It resides in crab’s bottom and
grows to form a lump in its shell, developing roots that
spread through the whole crab’s body even its eyes. This
gross invasion fails to trigger any immune response in the
crab, which continues to wander through the surf, eating
clams and mussels. However, if this invasion took place in a
human body, the outcome would be drastic. Eventually, the
crab begins to change into a new sort of a creature existing
to serve the parasite. This invasion stops the crab from
molting and growing as this would funnel away energy from
the parasite. Crabs also lose the ability to regenerate
their claw. Some parasites react to the behavior of their
hosts, an interaction called social parasitism. More simply
put a parasite might take advantage of the tendencies of a
particular species for the benefit of its own...
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...Operations management concepts and theories are derived
from the general management theories, like planning,
coordinating, organizing and controlling. The general
management theories are employed to improve the efficiency
of the personnel and that of the organization...
