‘Tech Talk’ Archives
How to Find the Vertex of a Parabola
Photo courtesy of Standard Travel Photos click for larger image The other day before a baseball game, we were out in the outfield playing catch. We were throwing the ball back and forth, and we progressed we got farther and farther apart from each other. After awhile we [Read More]
UBS Quant Job Interview Problem
Solution to a math problem posed to an interviewee at UBS. [Read More]
Slopes of Parallel and Perpendicular Lines
Looking at the slope of parallel and perpendicular lines [Read More]
Heron’s Formula for Area of Triangle
Photo courtesy of Standard Travel Photos click for larger image Anyone that ever took geometry in high school probably remembers that the area of a triangle is 1/2 x BASE x HEIGHT, or A = ½bh But suppose you are given the length of all three sides of the triangle, and [Read More]
How to Calculate Your Mortgage Payment
Sal from Khan Academy derives the formula for calculating your mortgage payment using a geometric series and some algebra. [Read More]
Boston Red Sox Pro Photographer Michael Ivans
Boston Red Sox photographer Michael Ivans discusses his ideas about baseball photography. [Read More]
Where Did the Quadratic Formula Come From?
The quadratic formula from high school algebra is derived and conquered. [Read More]
Unix: How to Automate Thumbnails
Use a shell script to automate the creation and uploading of thumbnails. [Read More]
Wordpress: How to Disable Post Revisions
By disabling post revisions in Wordpress, it reduced the database size and allowed the wordpress MySQL database backups to complete. [Read More]
Wordpress: How to Target Ads for Different Categories
Display different ads in each categories in your Wordpress blog. [Read More]
Cameras of NAB 2011
Pictures of some of the cameras at the National Association of Broadcasters 2001 convention in Las Vegas. [Read More]
Nikon 80-200mm f/2.8 Zoom for Sports Photography
The Nikon 80-200mm F/2.8 plus a 2x teleconverter make a good action sports combination. [Read More]
Tamron 2x Teleconverter for Sports Photography
The photographer uses a Tamron 2x teleconverter to get closer to the action at major league baseball. [Read More]
Chicago Street Photographer Vivian Maier
Newly-discovered Chicago street photography of Vivian Maier. [Read More]
Christmas Ornament Self Portrait
Christmas ornaments reflect the lensman in this self portrait. [Read More]
Frozen in Time
Here’s a video shot from a train arriving at Bath Sap station. The video was shot at 120 fps with a casio exilim fh20. Here is the original attempt at this. A different approach was taken by Improv Everywhere in this video Frozen Grand Central where 207 froze in [Read More]
