Incidental Findings

Growth chart comparison

Data visualization

Comparison of Fenton, Olsen, and WHO growth charts and observations on the interpretation of small, large, preterm, and term.

Cessna 172S Performance Calculations

Predictive modeling of performance characteristics, including takeoff, climb, cruise, and landing. FOR EDUCATIONAL PURPOSES ONLY.

Delaying R Shiny textInput processing

Delay textInput processing until submit button or enter key is pressed, with example Shiny app to fetch METAR data.

Julia computation within Quarto

Quick test of executing a Julia code block from within a Quarto blog post.

Leaflet, GeoTIFF, and Colormaps

Data visualization

Using {leaflet} with a GeoTIFF background layer and resolving difficulties with RGB colormaps

METAR analysis, part 2

Updated to an interactive shinylive client-side web application to analyze historical METAR weather data for flight conditions by month and time of day.

Gestational age calculator

Newborn gestational age calculations in R. Given any set of LMP, EDC, DOB, date, GA, age, DOL, PMA, calculate as many of the others as possible.

PediTools bilirubin webtool via Alfred keyboard shortcut

Creating an Alfred app workflow to trigger the PediTools 2022 AAP hyperbilirubinemia guidelines webtool via zsh script

Gestational age parsing

Helper functions for vectorized parsing of gestational age strings to numeric and back

Future-proofing with PediTools Universal

Preparing PediTools for the future: support for 120+ distinct growth curves and beyond, including bulk calculations, plotting, and custom growth chart generation.

WHO growth standards, expanded

Data visualization

WHO Growth Standard expanded chart parameters – mildly automated data scraping and metadata parsing.

Night flight training

Data visualization

How to spend hours down the rabbit hole of finding precise definitions for night flying and analyzing exactly how accurate the usual rule of thumb is.

Custom checklists

Creating customized, precisely-sized, double-sided, laminated, easy-to-update checklists.

Crafting my own VFR Navlog

Creating a navigation log with heading, time, fuel consumption, and weight & balance calculations, also suitable for printing and folding for use on a kneeboard.

Folding aviation charts and internet archaeology

Retrieving long lost instructions on how to fold aviation charts, both the original Duncan McKillop method as well as a later improvement by Steve Hirlehey

Aviation winds aloft forecast locations

Data visualization

Update the original poor quality 30 kb GIF of aviation wind and temperature aloft forecast locations with R-generated vector graphics

Magic Labyrinth – generating fair (or unfair) game boards

Generate Magic Labyrinth random game boards and analyze fairness for different player start locations.

Plot histogram with overlaid normal curve

Given a vector of values, create a ggplot histogram with overlaid best-fitting normal curve, with prettified caption of numerics