Harness Unused WiFi Signals for Power with Metamaterials

November 12, 2013 in 802.11, In the Media, In the News, Mathematics, WiFi Hacking by trevelyn

I recently saw this article (http://tinyurl.com/ssrwifi) from a comment iBall made on FaceBook. First, this isn’t that new. It’s been worked on for about a decade now and founded/hypothesized back in 1968. And yeah, from 1968 to about 1999 most of the work was “theoretical.” What I am talking about is a material designed to “catch” electro[magnetism]. In Physics, there is something called the “index of refraction” which is measured by how electro[magnetic] energy changes velocity in a new material. A simple example of refraction is in the case of light into glass or water. Have you ever seen a
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C Programming Tutorial 9

July 26, 2013 in Howto, Mathematics, Programming by trevelyn

Comments C Comments are hidden messages in the source code that only the developer(s) or anyone with access to the source can see. The generally are used for maintaining code, debugging, and making it easier for expanding your code. Its always good practice to use as much comments as possible when dealing with huge applications. Let’s take a look at how we can add comments into our source code, though we have come across one way already – the // comment. // Comment Above we can see someone with a slight obsessive problem to comment small applications in C. The
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C Programming Lesson 8

July 26, 2013 in Howto, Mathematics, Programming by trevelyn

Boolean Logic Boolean Logic was derived from George Boole’s Algebra that he did back in the mid 19th century. It consists of AND, OR, and NOT. Let’s first take a close look at AND. AND Logic Let’s say we have an integer variable a that equals 10. Let’s also assume that we have a while loop that loops 10 times and increments a each time. What could we do if we only wanted to printf(); a when it was 15,16,17,18 and 19? Well we could write out 5 if(){} statements in our compound statement fo rthe while loop like so:
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C Programming Tutorial 7

July 26, 2013 in Howto, Mathematics, Programming by trevelyn

Looping Around In programming we have something called a “loop.” It looks like the if(){} statement and runs exactly the same, but repeats over and over ONLY while the conditional portion (in parenthesis) returns false. This is good for doing repetitive tasks or checking how many items are in a list by looping through them. It’s a fundamental concept that you’ll easily get familiar with and use in almost all of your applications. In this tutorial I will be covering three different finds of loops, the while, for and do while loops. Let’s first take a look at the for
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C Programming Tutorial 6

July 25, 2013 in Howto, Mathematics, Programming by trevelyn

Checking Sanity Let’s check to see if it is worth continuing or not after receiving user data. This is commonly referred to as a sanity check. We will be using a new syntax for this called an if clause that will check to see if our user input integer is at least 3 in value. First, let’s take a look at some simple mathematical comparison operators. x == y : x value equals y’s value (not to be confused with the left hand assignment operator!) x < y : x's value is less than y's value. x > y :
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