Math 355 - Mathematical Modeling

Homework

I will attempt to remember to post homework assignments and due dates here, but you should not count on this page being completely up to date.  The assignments and due dates will be given in class, during the course of the lectures as we get to the appropriate topics.

Only the best 28 homework assignments will be kept (out of 36).

Assigned Due Assignment
Friday, Jan. 11 Wed., Jan. 16 A:  Find an example of a model used in some television show, movie, or novel (other than the CSI episode shown in class) that illustrates the feedback process.  Give a brief description of the action/plot in the show or novel to give some context and describe the model and how the feedback process is shown. (Remember to cite your source - name the movie, television show, or novel!)

B:  Find an example of a physical or simulation model used in everyday life (at least for someone – so models specific to professions are allowed).  Give a brief description of the model, what makes it a model, and what assumptions are being made in the model.

Note:  Your answer is clearly going to be in English, so I expect you to use appropriate grammar and spelling, and for your answer to be legible (in other words, if your writing is atrocious, type it).  I expect each to be about one or two paragraphs.  I would be surprised if either was more than a page.

Monday, Jan. 14 Friday, Jan. 18 A:  For the handout given in class about the camp project:

a)  Give two fundamentally different goals for creating the groups.  (What does the camp counselor want to accomplish with the groups?)

b)  Choose one of your goals and create the groups based on that goal. 

c)  Write a paragraph or two to justify your group formations as if you were discussing their formation to the parents of the children.

Wednesday, Jan. 16 Wednesday, Jan. 23 Chap. 1:  #3, 4
Wednesday, Jan. 16 Friday, Jan. 25 Chap. 1:  #2, A

A:  For the setting of Ex. 1.1, prove that if there are n players then you can not have a team with exactly n-1 players on it.

  Friday, Jan. 25 Topic proposal for the individual project.

The proposal should be typed.  It should include a brief summary of your idea and a brief explanation of the level of mathematics or calculation required.  It should only be two to three paragraphs.

Wednesday, Jan. 23 Monday, Jan. 28 Section 2.1:  #2, 12
Friday, Jan. 25 Wednesday, Jan. 30 Section 2.1:  #3, 6, 9
Friday, Jan. 25 Friday, Feb. 1 Section 2.1:  #5, 13
  Friday, Feb. 1 Groups for the group project.  This is just the names of the people in your group.  (This is not a graded assignment.)
Wednesday, Jan. 30 Monday, Feb. 4 Section 2.2:  #12
Friday, Feb. 1 Wednesday, Feb. 6 Section 2.2:  #6, 7  You don't have to do these analytically.  Use Maple (or Mathcad), and turn in your answers and the relevant graphs.
  Friday, Feb. 8 Topic proposal for the group project.
Wednesday, Feb. 6 Monday, Feb. 11 Section 2.2:  #10 (Use Maple)
Monday, Feb. 11 Monday, Feb. 18 Section 2.5:  #1, 4
Monday, Feb. 11 Wednesday, Feb. 20 Section 2.5:  #9  (Use Maple or other software.)
Wednesday, Feb. 13 Friday, Feb. 22 Section 2.3:  #A, 7, 8

A:  Find the group preference ranking using the method of pairwise comparison with simple majority rule and the data on which electives you would most like to take.

Monday, Feb. 18 Monday, Feb. 25 Section 2.3:  #14, #19a
Monday, Feb. 18 Wednesday, Feb. 27 Section 2.3:  #2, 6, B

B:  Find the most preferred alternative using sequential voting for the data on which electives you would most like to take.  Use at least three different sequences of comparing the electives.  Note that the same elective wins every time.  Explain why that will happen in this case.

Wednesday, Feb. 27 Monday, March 10 Section 2.3:  #20, 21, C  (21a should read "... decision process is pairwise comparisons and simple-majority rule."

C:  Find the group preference ranking using the Borda Count method on the data on which electives you would most like to take.

  Wednesday, March 12 Final paper for the individual project.
Friday, Feb. 29 Wednesday, March 12 Tannenbaum Chap. 1:  #5, 10, 17, 26, A

A:  Find the most preferred elective from the class survey using the Plurality-with-Elimination method.

Friday, Feb. 29 Friday, March 14 Tannenbaum Chap. 1:  27, 33, 54, 67, 71
Friday, Feb. 29 Monday, March 17 Tannenbaum Chap. 1:  52, 56, 64
Monday, March 10 Wednesday, March 19 Tannenbaum Chap. 1:  42, 44, 59, 70
Wednesday, March 12 Friday, March 21 Tannenbaum Chap. 2:  4, 8, 14, 18, 43, 49, 55
Friday, March 14 Wednesday, March 26 Tannenbaum Chap. 2:  26, 28, 33, 45, 48, 58
Wednesday, March 26 Monday, March 31 Tannenbaum Chap. 4:  3, 9, 19, 27, 35, 23, 31, 24, 32 (They are grouped by topic, which is why they aren't in numerical order.)
Wednesday, March 26 Wednesday, April 2 Tannenbaum Chap. 4:  46, 50, 57
Monday, March 31 Friday, April 4 Maki/Thompson Section 2.6:  #10
Monday, March 31 Monday, April 7 Maki/Thompson Section 2.6:  #8, 9
Monday, March 31 Monday, April 14 Maki/Thompson Section 2.6:  #2, 3b
Wednesday, April 3 Wednesday, April 16 Problems A and B

A:  Use a Monte Carlo simulation to approximate the integral of exp(-x2) from -10 to 10.  Use a fairly large N.

B:  a)  Use a Monte Carlo simulation to approximate the integral of sin(x5)tan(5x2sqrt(x))/(1+excos(esqrt(x)+2)) from 0 to 1.5.  Use N=1000 and run the simulation 10 times (record the answer for each).

     b)  Graph the integrand and speculate on what is wrong.

Monday, April 7 Friday, April 18 A)  If the service time is a fixed 5 minutes and the average time between calls is exponentially distributed with a mean of 5 minutes, estimate the percent of calls rejected if there is just one telephone line, using a Monte Carlo simulation.
Wednesday, April 16 Monday, April 21 Maki/Thompson Section 2.7:  #2, 4, 7, 13  Use the formulas in the text (you don't need to program anything).
Wednesday, April 16 Wednesday, April 23 Tannenbaum Chap. 8: 12, 13, 20, 56, 24, 26, 57, 67
Wednesday, April 16 Friday, April 25 Tannenbaum Chap. 8:  21, 33, 34, 38
Wednesday, April 16 Monday, April 28 Tannenbaum Chap. 8:  28, 30, 32, 47
Wednesday, April 16 Friday, May 2 Tannenbaum Chap. 8:  18, 51, 52, 41

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Last Revision:  01/04/2008

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