John Santiago's Blog (31)

Here are updated videos on the Continuous-Time Convolution Problem.



Part 1- Introduction (to be posted soon)











Part 2 - Continuous-Time Convolution Example



You can view the convolution as a time-domain representation (inverse Laplace Transform) of the the following relationship in the frequency domain description Y(s)=H(s)X(s) where Y(s), H(s), and X(s) as the Laplace Transform of the output signal, impulse… Continue

This blog will discuss orbital mechanics. Please visit this blog article as I will be posting more updated videos on this topic.



Keppler's Three Laws



Part 2 - Two-Body Diagram, and Specific Mechanical Energy…



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This article consist of videos to build an origami sphere. Below is a final assembly of the origami sphere using hexagonal flat units. This version has windows and is known as a truncated isosahedron.



Videos on building hexagonal flat units and joint units is shown here first.





Video on Final Assembly. You will need twenty hexagonal flat units and thirty joints based on the above video to complete the final assemble.…



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Base folds are basic forms serving as a basis for more creative origami figures. They are easy to do and will become like second nature while watching TV. With the appropriate base fold selected, you can bring new creations to life, especially with stop action animation.



You can use these origami figures for animation which in turn can be used to demonstrate sampling.



Part 1: Base Folds 1 and 2 are presented.





Part 2: Base Fold… Continue

Since origami is a creative endeavor in which animation was used as an example to show the concept of sampling, here are some basic folds and instructions used in origami folding. These short videos are posted on You Tube and other similar video sites. There will be another post on Base Folds.



Part 1: Kite Fold, Valley Fold, Mountain Fold







Part 2: Inside Reverse Fold, Outside Reverse Fold, Pleat… Continue

One example of the Sampling Concept is Animation or Filming. Below are my efforts in this area using Origami Animation. Enjoy!



Example 1: Sampling Through Origami Animation









Example 2: Samplng Through Origami… Continue

We'll begin with a review of the convolution with an impulse function in the time-domain. The impulse function will be described in the frequency domain





Analytical Description of the Sampling. Sampling is discussed using the concept of convolution in the frequency domain.…



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This web page will be updated as I find useful and relevant video links associated with electrical and systems engineering.



Digital Communications: Digital Communications 2 at MIT



Electrical Engineering Courses at econtent.wikispaces.com



Here are some useful links from a… Continue

Using Matlab or specifically Simulink, the video will show how a square wave can be represented as a sum of sine… Continue

To view all the videos on the Laplace Transform, type in the search box the words "Laplace Transform".



Introduction.



Derived from the work of a British engineer Oliver Heaviside, the Laplace Transform remains a powerful tool and foundation in analyzing linear systems, especially involving feedback systems.



Finding the system response using the classical differential equations is difficult. On the other hand, the Laplace Transform technique makes it a snap… Continue

This video describes the discrete-time convolution and how it can evolve to a continuous time convolution. Superposition and time-invariance are discussed.





I plan to provide a complete lesson based on the Convolution and Laplace Transform. Contact me if you need more information at… Continue