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Concise Articles, Tutorials & Primers on Physics, Math & Technology & Obscure Science Topics

Modern Technology

Short articles on modern technology from toys to tools. We love our lasers, CD players, GPS, cell phones, ATMs, mag stripes, bar code readers, computer aided design and even computer controled milling machines. This page is devoted to showing how things like these work.

At work, at play and everywhere in between We enjoy the ease, comfort and capabilities provided by modern technology. Robots build our cars, computers automate our daily repetitive tasks and machines give us power far greater than our own and communication with people and places all over the world and beyond. Most of us never know how these technologies work and even those of us that are expert in some advanced technologies might know little or nothing of others. That situation is not likely to ever change. There is far too much to know for any individual to become expert or even competent in more than a handful of the amazing technologies that make up our world.

Articles listed on this page will share some of the secrets of those technologies that you may not already be familiar with.

Finding Edges in Images -The Sobel Operator

The Sobel operator is a commonly used image processing method for finding edges in an image. You can use it to quickly find outlines of objects in a photo or video feed.

If you have ever wondered how to easily get an outline from an image, such as a photograph or even a live camera feed, this article describes a simple process using the Sobel operator. With this method you can take a photo and quickly draw just the outlines of the objects in the photo. This is a commonly used image processing operation that allows machines to find information that your brain automatically picks out, or sometimes the machine can even cut through clutter that your brain won't.



Being Shot At

Incoming Missile: What does it look like when you are the target of a missile? Cool Videos From the point of view of a target. Missile approach videos.

Past Technology Articles

The Rogowski Coil

The Rogowski Coil. This article describes the theory of operation of a great tool for measuring fast pulsed currents or high frequency currents without direct contact.

How MP3 Files Work

How do MP3 files Work? The Science and Math Behind All That Entertainment.

How Magstripes Work

How do MagStripes Work? The technology behind the magnetic stripes on your credit cards. How does the magnetic stripe on the back of a credit card work?

Works in Progress

  • Transportation Technologies
  • Automated Teller Machines
  • Robots
  • Satellites
  • Bar Code Readers
  • Lasers
  • Web Crawlers
  • HDTV
  • Communications Technologies
  • Medical Technologies
  • Crime Investigation
  • Giant Magnetoresistance


  • Quick Science & Math References



    Physics Basics Series



    Math Basics Series

    • Numbers
    • Arithmetic
    • Algebra
    • Geometry
    • Analysis


    Technology Basics Series



    Knowledge Branches

    • Information Theory
    • How Reading Works in the Brain
    • Psychology of Learning
    • Logic


    WORK IN PROGRESS

    • What is the Stark Effect?
    • The Chemistry of Love &/or Addiction
    • Critical Thinking: How to question what you see, read or hear.
    • Aristotle's Prior Analytics - the birth of Logic.
    • Optical Solutions, lenses that solve problems
    • Fractals
    • PTC - Photon Transfer Curve or Mean Variance Analysis
    • 3-D Noise
    • Laser Primer
    • Rail Guns
    • Special Relativity
    • Radar Technology
    • Acousto-optic Cells
    • Harmonic Generation for Laser Frequency Doubling (SHG) and Tripling -using non-linear crystals.
    • Measurement: Accuracy & Precision.
    • Things you should know about computer modeling of physical phenomena!
    • Giant Magneto-resistance
    • Peltier Cooling
    • Pyro-Electric Detectors
    • Piezo-Electric Crystals
    • Laser Speckle
    • FFT and DFT the fast fourier transform and the discrete fourier transform
    • Fabry Perot Etalon
    • The Hydrogen Atom.
    • PCA (Principal Component Analysis)
    • Energy per mass in fuels such as Hydrogen, Gasoline, Kerosene, HMX etc...
    • Nobel prize winning work on the CCD
    • How does a CCD work and what are the normal characteristics of a CCD
    • Nobel Prize Winning work on Giant Magneto-resistance
    • FROG -frequency resolved optical gating
    • Optical Wavefront Sensing
    • THz imaging and time-domain spectroscopy
    • Camera Calibration
    • Laser Designators
    • Resampling

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