# Monthly Archives: March 2011

## Star Trek Analogies to Engineering Management

It amazes me how often my management experiences remind me of Star Trek episodes. A good example came up today. At extremely regular intervals, I must prepare budget reports that document the spending of my department. If I am late, … Continue reading

Posted in Management | 1 Comment

## Battery State of Charge

Introduction Nearly all of our products are sold with an Uninterruptable Power Supply (UPS) because customers need phone service for emergency voice calls, which we refer to as "lifeline service". Batteries are used for energy storage in all of our … Continue reading

Posted in Batteries, Electronics | Comments Off on Battery State of Charge

## Quotes of the Day

Since I began sending emails, I have put quotes at the bottom of them. I change the quote for every email I send. Many people have said that they enjoy them. I thought I would include the most popular here. … Continue reading

Posted in Personal | Comments Off on Quotes of the Day

## Super Full Moon

One of the engineers just stopped by and told me that Saturday (19-Mar-2011) we will have a "Super Full Moon". This means we will have a full moon and it will be unusually large (14% wider). See this link for … Continue reading

Posted in Astronomy | 1 Comment

## Dimensional Analysis and Olympic Rowing

Introduction I have always found dimensional analysis to be a very useful engineering tool. I recently watched a video Professor John Barrow of Gresham College who did a very nice job illustrating how dimensional analysis can be used to derive … Continue reading

Posted in General Mathematics | 1 Comment

## A Little Drive-By Math Incident

A quick math problem came by my cube today that was worth sharing. I was asked if there was a closed-form solution to Equation 1. Eq. 1 This problem does not have a closed form solution using the "everyday" functions, … Continue reading

Posted in General Mathematics | Comments Off on A Little Drive-By Math Incident

## Trigonometry, WWII Torpedoes, and a Museum Docent

Introduction I received a message a few weeks ago from a docent at an East Coast museum. He was using an article I wrote for the Wikipedia years ago to demonstrate an application of trigonometry to high school kids. In … Continue reading

## Neat Pictures from Mars and the Moon

One of my favorite blogs is written by Emily Lakadawalla for the Planetary Society. I was looking at some of her old material and found some pictures that I had never seen and I thought I would share with my … Continue reading

Posted in Astronomy | 1 Comment

## Current Source Built with a Negative Resistance

Introduction I have seen quite a few schematics lately that are using an operational amplifier (opamp) configured as a negative resistor. I thought it would be interesting to analyze this circuit and show how it can provide an economical solution … Continue reading

Posted in Electronics | Comments Off on Current Source Built with a Negative Resistance

## Engineering as a Social Activity

I haven't been able to blog the past week because I have been in Los Angeles at the Optical Fiber Communication Conference and Exposition (OFC). I always enjoy going to this conference. After thinking about it, I enjoy it because … Continue reading

Posted in Management | Comments Off on Engineering as a Social Activity