Posts

Showing posts from February, 2023

7.1 Random distribution of beads

Image
I used the two-dimensional bead distribution spreadsheet developed fall 2022 to attempt to show that the beads land in a normally distributed manner .  Again, the Tripltek tablet was crucial to gathering data, which was simultaneously appearing on the board.  And while this is slick and generates two normal distributions, the current process skips the step of moving from a discrete columnar histogram to a continuous line histogram. Based on questions at the end of class, this confused students because the 7.1 homework is a discrete columnar histogram. As was the case last fall, this particular path moved quickly to Desmos, but probably too quickly.  While I could use only the row totals as that would be easier to work with, row00 is affected by the east wall leading to a fat left tail. The columnar totals remain the more normally distributed and should be kept. Also, the leftmost column should be all zeros to bring the left tail to the x-axis.  Post-hoc the spring 2...

Latitude and longitude

Image
Although hide and seek had used smartphones to obtain GPS coordinates, for the laboratory I returned to using handheld GPS receivers.  The class began at E 158° 09.600' on a line of latitude that I thought might just miss the corner of the B building. The specific latitude varied and by receiver and went unrecorded.  The weather was, for the first time in a number of terms, cooperative with relatively dry ground conditions.  Sharla and Ashlen heading East Jarret takes a reading at 30 meters Ashlen takes a reading at 30 meters Serjean joined 8:00 on the left, Athina Viola on the right records data  The Tripltek tablet provided conversions for the measuring wheel. This track put the wheel up on the bend out around 90 meters. Taking a reading under the Terminalia catappa tree The class hit the fence just shy of 180 meters, so I ran up the into the acute corner. This required a slight deviation north of due east.  I hit 180 meters exactly at the cement in the ...

Plants that feed us

Image
Latisha and Charlyn describe the local snack food called pikhol made from papaya, salt, lime, pepper, and vinegar. The word has its origins in the English word "pickle." Pickled papaya Peter and Jarred from the outer islands of Yap presented wiish iigeig, ground banana. Grind the banana. Wrap in banana leaf. Boil. Add coconut milk. This dish is related to Pohnpeian uht idihd and Kosraean op. Wiish iigeig Gorinna presented rotama, made from hard taro. Grind hard taro. Put in leaf with sugar. Wrap in a leaf and then boil. Then remove from leaf. Pound with coconut milk to desired consistency. Gorinna Mayoleen, Cialinda, and L-Jane presented uht pwal piahia. Pwal means to cut or to split. Thus the dish is split bananas with coconut milk topping. Split peeled cooking banana in half, cook in coconut cream/milk. The bananas are not boiled in water, they are cooked in the coconut milk. Uht pwal piahia Harden and Selten presented kehp idihd. Two seasons. Harden explained that in Pohnp...