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Monthly Archives: March 2011
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
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
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
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
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
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
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
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
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