Monthly Archives: March 2013

Distibution of Catholics Around the World

Posted on 17-March-2013 by mathscinotes

Introduction I am showing one of my sons how to use Excel pivot tables, so I am looking for good data analysis examples that illustrate the power of pivot tables. The election of a pope has put Catholicism in the … Continue reading →

Posted in General Mathematics | Comments Off on Distibution of Catholics Around the World

A World War 1 Mechanical Torpedo Fire Control Computer

Posted on 13-March-2013 by mathscinotes

I have discussed the basic calculations behind firing "straight-running" torpedoes in other posts (here, here, and here). Youtube has a couple of interesting videos showing a basic mechanical torpedo fire control computer from World War 1. It is a nice … Continue reading →

Posted in History of Science and Technology, Underwater | 1 Comment

Hometown Humor

Posted on 12-March-2013 by mathscinotes

My brother called the other night and said that he was going to attend a live show with Kevin Kling, a well-known comedian we grew up with in Osseo, Minnesota. In my youth, Osseo was a small agricultural community on … Continue reading →

Posted in Osseo, Personal | Comments Off on Hometown Humor

Spline Interpolation Example Using Battery Capacity

Posted on 10-March-2013 by mathscinotes

Introduction I had a conversation with a customer recently who wanted to estimate the capacity and running time of their electronic systems when operating from batteries that are under various current load and temperature stresses. The battery manufacture had only … Continue reading →

Posted in Batteries, General Mathematics | Comments Off on Spline Interpolation Example Using Battery Capacity

Battery Life Dissipated Under Varying Temperature Conditions

Posted on 6-March-2013 by mathscinotes

Introduction I am not getting any younger. As I age, I have come to realize that certain activities age me faster than others. For example, I have no doubt that sitting in meetings for hours every day has deleterious effects … Continue reading →

Posted in Batteries, Electronics | 1 Comment

Asteroid Belt Mass Distribution Analysis

Posted on 3-March-2013 by mathscinotes

Introduction The meteor explosion over Russia really interests me and I have been reading as much about it as I can. While reading about meteors and asteroids, I encountered the following statement. The total mass of the asteroid belt is … Continue reading →

Posted in Astronomy | Comments Off on Asteroid Belt Mass Distribution Analysis