Welcome To Computers 4 Life

    Computers 4 Life is all about computers and how to do things with them. I will teach you how to do all sorts of things, from the very basic to fairly complex I will tell you when we are working with things you need to be careful with thanks for stopping by and enjoy your stay.

Seth at Computers 4 Life

Website Hacking by SQL Injection – With an example

Here is some information on Sql Injection

A Card Trick Leads To A New Mathematical Bound On Data Compression

A complicated card trick that deals with the colors of the cards and a binary De Bruijn cycle has helped a mathematician reach a new bound on data compression. Magic and math, more friendly than you’d think!

Here’s how the trick works: You hand your friend a deck of cards and ask them to draw six cards (in order) and name the colors. With that sequence of colors, you can immediately name the exact cards that have been drawn. How? Because each color sequence is unique and appears only once throughout the deck (after pre-arranging it to be so), so if you have an insane memory, you’ll know which cards correspond to the sequence.

According to Travis Gagie from the University of Chile in Santiago, the trick is closely related to data compression:

Gagie achieves this new [mathematical] bound by considering a related trick. Instead of pre-arranging the cards, you shuffle the pack and then ask your friend to draw seven cards. He or she then lists the cards’ colours, replaces them in the pack and cuts the deck. You then examine the deck and say which cards were drawn. This time you’re relying on probability to get the right answer. “It is not hard to show that the probability of two septuples of cards having the same colours in the same order is at most 1/128,”

This turns out to be closely related to various problems of data compression and leads to a lower bound than has been found by any other means.

Magicians as mathematicians, I should have known. [Technology Review]

 

Related Articles

• Card Trick Leads to New Bound on Data Compression (technologyreview.com)
• Blog – Card Trick Leads to New Bound on Data Compression (technologyreview.com)

Fear In A Can

These fear-in-a-can cans by Hoxton Monster Supplies are perfect: the unassuming typeface, color and laugh out loud descriptions make for a great gag gift. I’ll take a vague sense of unease and escalating panic please.

via Fear In A Can.

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Thomas Edison’s Oddest Inventions

Thomas Edison is an inventor known for great things.

We also know he had a pretty good sense of humor. Some of these er, lesser known contributions from Mr. Edison were ahead of their time; others are just plain twisted.

View Full Photo Gallery

»Feeling the spirit of Thanksgiving, American ingenuity, or invention? Why not take a look at this homage to the light bulb, get the skinny on 15 founding father invention myths, check out some painful looking tattoo machines, marvel at tesla coils, or admire 10 antique phonographs. [Oobject]

via Gizmodo.

Is this the ultimate recycler? | Education | The Guardian

Image via Wikipedia

How about this for a ridiculous modern myth. There is a machine somewhere in America that can take virtually any sort of waste – offal from an abattoir, old tyres, junked computers – and turn it into high quality oil, plus pure minerals and clean water, all in a few hours. It is an invention that could change the world. Not only might it end the wests, and in particular Americas, dependence on imported oil, but it has also the potential simultaneously to solve the increasingly pressing problem of waste disposal.

via Is this the ultimate recycler? | Education | The Guardian.

from Changing World Technologies

Changing World Technologies (CWT), founded in August 1997, is committed to addressing energy and environmental problems simultaneously. Using our patented Thermal Conversion Process (TCP) we are able to transform organic wastes into valuable products without further destroying our delicate planet. CWT is forging a viable economic benefit from a dangerous environmental burden.

Related Articles

• EarthTalk: A National Recycling Law? (greenparentchicago.com)
• America Recycles Day (1800recycling.com)
• I Recycle. Do You? November 15 is America Recycles Day! (greenreview.blogspot.com)

M55 – Home of electric bikes.

Image via Wikipedia

http://www.youtube.com/watch?v=3S5qUg312-s

The world’s first luxury electric bicycle is coming to earth soon!
Official reveal: 2010 EUROBIKE

Recently more and more electric bicycles are appearing city streets. While the new trend of electric bike development is a welcome improvement, it is flawed by heavy compromises. Most E-bikes available today are rather primitive machines. The majority of the electric bike kits contain no more than a hub motor and a frame-mounted battery cell. The development of these power assist vehicle models were not based on design, maximum range or maneuverability, but rather the functions they can offer. Most of these models are neither suitable to be used as bicycles, nor as successful e-bike. They offer a little of everything, but do not satisfy any specific requirement. They do what they were designed to: they take their riders from A to B, which is fine for some but not others.

from M55 – Home of electric bikes.

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Take a Ride on a Creepy Crawly Robotic Skateboard

Take a Ride on a Creepy Crawly Robotic SkateboardWho the hell knows when were getting hoverboards? The Land Crawler eXtreme, a creepy 12-legged personal transport bot, is here now, and its only a matter of time before someone figures out how to kick flip one.Made for his son by the Japanese roboticist Vagabond Works, the Land Crawler eXtreme has six pairs of nightmarishly scurrying legs that can support a 175 pound passenger. The current version moves slowly but steadily, though Im sure well see a faster moving version and corresponding X-Games event in the near future. [Singularity Hub via PopSci]

via Take a Ride on a Creepy Crawly Robotic Skateboard.

Google Sketchup

Image via CrunchBase

As Google puts it

Model anything you can imagine.

Redecorate your living room. Invent a new piece of furniture. Model your city for Google Earth. There’s no limit to what you can create with SketchUp.

and there really is no limit I’m working on a review of it coming on Monday just wanted to let every one know about it first.

Up Coming Series: Wiping and Reloading Windows XP The Right Way

Image via Wikipedia

Seth here at Computers 4 life.  Starting December 1st every Wednesday for 8 weeks,  I will be publishing a series titled “Wiping and Reloading Windows XP The Right Way”. I will be taking you through from start to finish including:

• Backing up your Files
• Deciding how to setup your hard drive
• Installing Windows XP
• Installing and updating AVG and Malwarebytes
• Updating Windows XP
• Installing needed programs
• Restoring backup and setting up weekly backups
• Setting up weekly checks

Getting Firefox Back Online

Just like the “Getting Internet Explorer Back Online” Blog this one is focused on Firefox. On to the how to…