Experiment of September 30th, 2003 : SBP Lab 2

Conducted by Deryck Morales (deryck@alumni.cmu.edu)

Overview

For an overview of this experiment, please see the explanation page.

This experiment was conducted at the doorway to lab2 as a three way intersection.

The minima distance at equidistance was approximately 38 inches for this meetpoint.

The number of arrivals per edge was five (5).

Results:

Minima

We can see from the first figure that the observed minima values ranged from 37.5 to 38.8 inches.

The overall mean minima value was 38.2 inches, with a standard deviation of 0.3 inches.

We can see from the second figure that the mean minima values (mean per sample) ranged from 37.7 to 38.5 inches.

The standard deviation of mean minima values was 0.2 inches.

Therefore, we have SIGMA_DIST = 0.2 (inches).

Edge angles

The relative edge angles of the meetpoint were about 115,115 and 130 degrees, as shown in the first figure.

From the second figure we see that the asymmetry mean was 15.5 degrees, with a standard deviation of 3.9 degrees.

Therefore, we have SIGMA_SYM = 3.9 (degrees).

Discussion:

In comparing this data to that of 09.22.2003 we observe that the distance measurements
have less deviation, while the angular measures have increased deviation.

We expect both deviations to increase with scale of the environment, and I believe that the drywall material explains the
decreased range deviation because the cardboard produces more noise in range.

Again, we need to collect more data to draw conclusions. Next will be in concrete environment (Wean Hall) with varying scale
but not varying material.

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