Monday, September 30, 2019

Using HEC-RAS 2D area breaklines to improve modeling

HEC-RAS 2D area breaklines are a great way to force cell faces to follow a terrain ridge or crest hinge (top of slope) line.

Monday, September 9, 2019

Windows batch file to map virtual drive letter with prompts and conditional branching

I created this batch file for NPS Maricopa Inc. to help colleagues map their local Dropbox root to a standard drive letter. This was necessary because AutoCAD Civil 3D data shortcuts do not use relative paths.

Monday, July 1, 2019

DDMSW HEC-1 Quick Start

DDMSW is a program of Maricopa County to calculate and manage drainage projects. This blog post tells the simplest way to get started using the HEC-1 hydrology part of DDMSW.

Sunday, May 5, 2019

Arrested and stranded in Chihuahua, Chihuahua

Saturday 2 Mar 2019
It's dark, and it's getting late. My bags are both heavy and ill-prepared. I need to find a bus to downtown Chihuahua. I know downtown is to the right, but a passerby assures me the bus to downtown comes from the right. So I confirm with other passersby, then cross the street to wait at a bus stop on night three of a 3-week vacation now interrupted.

Thursday, March 14, 2019

Driving in Mexico 2019

Mexico Customs (la Aduana) considers your vehicle contraband if you leave the border zone without first getting a Temporary Import Permit (ImportaciĆ³n Temporal) from Banjercito (Make sure you understand how your security deposit will be returned to you) in addition to your personal visa and your Mexico insurance (I got mine from GNP).  Here's my sad story:

Sunday, February 10, 2019

Best practices for HEC-RAS 1D modeling with AutoCAD Civil 3D

Best practices for HEC-RAS 1D modeling with AutoCAD Civil 3D

Thursday, January 24, 2019

Positive proof that the earth is not a sphere

If the earth were roughly an ellipsoid (even more roughly a sphere) approximately 8000 miles in diameter, it would imply several things that are clearly false:

Tuesday, January 1, 2019

How to calculate dice and cards probabilities in the 21st Century

Dice probabilities are calculated using something called the Binomial Distribution. Wait! Wait! Don't go away. This is super easy. And I'm giving you a finished calculator. But it's good to remember the name of the formula. Card deck probabilities are calculated using the Hypergeometric Distribution. For dice, here's the BINOMDIST calculator. For cards, here's the HYPGEOMDIST calculator.

Snom 320 IP phone basic configuration quick start

This assumes you have a voip account set up at VOIP.MS with a DID number and server. This is how to configure your Snom 320 IP phone for basic use.

Sunday, September 16, 2018

Best practices for HEC-RAS 2D modeling with AutoCAD Civil 3D

I've had enough experience now using AutoCAD Civil 3D and HEC-RAS for 2D flow modeling in Maricopa County Arizona to share a list of best practices. It's only a small beginning, but it's something. Enjoy.

Wednesday, August 29, 2018

How to export a shapefile from AutoCAD or Civil 3D

Somebody wants a shapefile and you are an AutoCAD user or a Civil 3D user. How can you give them a shapefile? It's pretty easy. And it requires nothing but AutoCAD (assuming you have the ADESETCRDSYS and MAPEXPORT commands available) . But you need to learn a few new tricks and terms.

Saturday, August 18, 2018

EPA SWMM Notes and Tips

These notes and tips on modeling with EPA SWMM are mostly for me.

Monday, July 30, 2018

Fast with Sam Young for LDS Child Protection

This is a rigorous log of my participation with Sam Young in a fast for LDS Child Protection.

Saturday, June 30, 2018

Authority to use digital signature for a professional engineer seal in Arizona

According to the Arizona Revised Statutes R4-30-304.G, "An electronic signature, as an option to a permanently legible signature, in accordance with A.R.S. Title 41 and Title 44, is acceptable
for all professional documents. The registrant shall provide adequate security regarding the use of the seal and signature."

Tuesday, June 5, 2018

Documenting my Democracy Spring arrests

In 2016 I was arrested three times with Democracy Spring protesting for campaign finance reform (anti-corruption). Here I am documenting videos practicing love while protesting.