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Kalena Giessler - Halfaya

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Kalena Giessler - Halfaya Powered By Docstoc
					Kalena Giessler
Mr. Leo
APCAB
Period 3

                                 Calculus and Archeology

        Calculus relates to many different jobs in all different fields, even those that seem

very different from the typical view most people have of math and how it is involved in

their daily life. Calculus is the study of how things change. It allows people to make

predictions of models based on modeling systems. While these systems and models may

not be completely accurate, they give a glimpse into the nature of what something may do

in the future.

        To me, calculus relates to almost everything in life and to many of my possible

future career paths. One subject that definitely relates to calculus and math in many ways

is archeology. Archeologists study historical ruins to find artifacts such as tools,

ceramics, and weapons to learn more about previous civilizations. To be a good

archeologist, you must study math to analyze data. In archeology, many different

techniques are used to compute exact locations of artifacts and other things to ensure that

the collected data is as accurate as possible.

        Archeologists have recently begun to use different technologies, such as a

theodolite, remote sensing tools, and 3D image scanners to have even more accurate data.

While digging a plot, archeologists use simple math with a tape measure to measure

distance and the dimensions of artifacts. They can also use statistical math to calculate

how many of each artifact type is found in a plot or the average size of the artifacts.

        Archeologists use many types of math, in addition to calculus, such as

trigonometry and geometry. A theodolite is a machine that is used to measure horizontal
and vertical angles in triangulation. Triangulation is the process of determining where a

point is by measuring different angles to it from known points. Instead of measuring the

distance from the known points to the unknown point, archeologists can instead calculate

the angles and then determine the location of the unknown point. By calculating the

length of one side of the triangle and finding the angles of the triangle, an archeologist

can use the Law of Sines to determine the distance to the unknown point.

       If an archeologist finds carbon in the field, they can use radiocarbon dating to

determine how old the carbon is. Radioactive decay of carbon-14 is exponential, meaning

it decreases at a rate that is proportional to its value. The decay of carbon-14 can be found

using derivatives. This makes sense, because derivatives are essentially slope, and

archeologists are trying to find the rate of decay of carbon. The differential equation used

is,

                                        dN/dt = -CN,

in which N is the quantity of carbon-14 and C is the decay constant (a positive number).

It is very helpful to know how to solve derivatives to compute dates in archeology.

       Another important tool that has been recently used in archeology is the 3D image

scanner, which allows archeologists to take 3D models of a pottery shard and compare it

to others or document it for later use. The 3D laser image scanner works by measuring

the distance to a target point on the artifact and also the vertical and horizontal angles to

that point. By getting multiple scans from different positions on the artifact from the

scanner, the laser scanner creates a 3D model of the artifact. Professor John Rick of

Stanford University told me that the scanner uses 3D geometry to produce a

mathematically accurate map of the artifact. By taking different pictures, or views, of the
object from many different angles, the scanner can capture an object in as little as 12

views. The 3D scanning system also uses multiple laser stripes to cross-validate the

geometric data it collects. The scanner that Dr. Rick uses has a 0.005 inch accuracy with

a maximum of 400 samples, or points, per inch. This technology is important for

comparing different ceramics and their engravings. It is also helpful to make an easily

accessible database of finds. Archeologists cannot only use the 3D scanners to document

artifacts but also to produce accurate models of buildings and ruins. Archeologists can

also use calculus to try to compute the rate of decay of ruins or how a site „behaved‟ in

changing conditions.

       Even though calculus and archeology seem very different, they are in fact very

related. Archeologists need a good basic understanding of calculus to be successful in

both surveying and documenting their finds. Calculus is very important in the profession

of archeology.
                                  BIBLIOGRAPHY

“Archeology Course”. Education-Portal.Com. Education-Portal.Com. Web. 26 October
      2009. <http://education-portal.com/archaeology_course.html>.

“How does math relate to archeology?”. Dig: The Archeology Magazine for Kids. Carus
      Publishing Company. Web. 26 October 2009. <http://www.digonsite.com/drdig/
      general/71.html>.

Kleitman. “What is calculus and why do we study it?”. Calculus for Beginners. Kleitman.
       Web. 26 October 2009. <http://www-math.mit.edu/~djk/calculus_beginners/chapt
       er01/section02.html>.

NextEngine. NextEngine. Web. 2 November 2009. < https://www.nextengine.com/indexS
      ecure.htm>.

Rick, John. Personal interview. 26 October 2009.

“Radiocarbon Dating”. Wikipedia. Wikipedia, 16 October 2009. Web. 26 October 2009.
      <http://en.wikipedia.org/w/index.php?title=Radiocarbon_dating&oldid=32012708
      1>.

“Theodolite”. Wikipedia. Wikipedia, 16 September 2009. Web. 26 October 2009.
      <http://en.wikipedia.org/w/index.php?title=Theodolite&oldid=314353965>.

“Triangulation”. Wikipedia. Wikipedia, 8 October 2009. Web. 26 October 2009.
       <http://en.wikipedia.org/w/index.php?title=Triangulation&oldid=318656375>.

Ullrich, Andreas, Studnicka, Nikolaus, and Riegl, Johannes. 3D-Laser-Sensors and their
        Applications in Archeology and Modeling of Historic Buildings. Vienna: RIEGL
        Laser Measurement Systems GmbH. Print.

				
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