50 Kick-Ass Websites You Need to Know About It's time to update the entries in your browser's links toolbar. But with recent estimates putting the size of the internet at well more than 100 million distinct websites, it's getting harder and harder to get a handle on all the great stuff that's out there. That's why we've compiled this list. And unlike some lists you may have seen, which try to name the very "best" websites, but end up just telling you a lot of stuff you already know, we've chosen instead to highlight 50 of our favorite sites that fly under most people's radar. Think of it as the Maximum PC blog roll (remember those?). You might have heard of some of these sites, but we'll bet you haven't heard of all them. Demoscene.tv See What Can Be Done with 4 Kilobytes If you’re any kind of nerd at all, you probably know about the demoscene, where talented programmers create complex videos rendered in real-time, stored in incredibly small files. lite.Facebook.com Clutter-Free Social Networking You can admit it. Soyouwanna.com
10 Easy Arithmetic Tricks Technology Math can be terrifying for many people. This list will hopefully improve your general knowledge of mathematical tricks and your speed when you need to do math in your head. 1. We all know the trick when multiplying by ten – add 0 to the end of the number, but did you know there is an equally easy trick for multiplying a two digit number by 11? Take the original number and imagine a space between the two digits (in this example we will use 52: Now add the two numbers together and put them in the middle: That is it – you have the answer: 572. If the numbers in the middle add up to a 2 digit number, just insert the second number and add 1 to the first: 1089 – It works every time. 2. If you need to square a 2 digit number ending in 5, you can do so very easily with this trick. 252 = (2x(2+1)) & 25 2 x 3 = 6 3. Most people memorize the 5 times tables very easily, but when you get in to larger numbers it gets more complex – or does it? 2682 x 5 = (2682 / 2) & 5 or 0 Let’s try another: 4. 5.
cooking conversions K-MODDL & Tutorials & Reuleaux Triangle If an enormously heavy object has to be moved from one spot to another, it may not be practical to move it on wheels. Instead the object is placed on a flat platform that in turn rests on cylindrical rollers (Figure 1). As the platform is pushed forward, the rollers left behind are picked up and put down in front. An object moved this way over a flat horizontal surface does not bob up and down as it rolls along. The reason is that cylindrical rollers have a circular cross section, and a circle is closed curve "with constant width." What does that mean? Is a circle the only curve with constant width? How to construct a Reuleaux triangle To construct a Reuleaux triangle begin with an equilateral triangle of side s, and then replace each side by a circular arc with the other two original sides as radii (Figure 4). The corners of a Reuleaux triangle are the sharpest possible on a curve with constant width. Here is another really surprising method of constructing curves with constant width:
10 Search Engines to Explore the Invisible Web Not everything on the web will show up in a list of search results on Google or Bing; there are lots of places that their web crawlers cannot access. To explore the invisible web, you need to use specialist search engines. Here are our top 12 services to perform a deep internet search. What Is the Invisible Web? Before we begin, let's establish what does the term "invisible web" refer to? Simply, it's a catch-all term for online content that will not appear in search results or web directories. There are no official data available, but most experts agree that the invisible web is several times larger than the visible web. The content on the invisible web can be roughly divided into the deep web and the dark web. The Deep Web The deep web made up of content that typically needs some form of accreditation to access. If you have the correct details, you can access the content through a regular web browser. The Dark Web The dark web is a sub-section of the deep web. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Relplot: equation plotter Relplot constructs high-resolution PostScript or PDF plots of the solutions to equations on two variables. Unlike most other plotters, it can handle general equations and inequations, not just functions, and it can plot multiple equations at once. What can you plot? Multiple equations/formulas separated by commas: ,Logical operators for combining formulas: && & ||Relational operators: = < <= > >=Binary arithmetic ops: + * - / ^ modUnary arithmetic ops: |x| sqrt floor exp ln sin cos tan asin acos atan atan2 sinh cosh tanhBuilt-in variables: x y r thConstants: pi e 2 -.5 1.4e5 .7e01 πUser-defined function applications: f(e1,..., en)User-defined variables: a-z x^3 + y^3 = 3xy, r^2 = 9/2 Some interesting equations to try: Got feedback? Relplot was written by Andrew Myers at Cornell University.
List of emoticons A simple smiley This is a list of notable and commonly used emoticons or textual portrayals of a writer's mood or facial expression in the form of icons. The Western use of emoticons is quite different from Eastern usage, and Internet forums, such as 2channel, typically show expressions in their own ways. In recent times, graphic representations, both static and animated, have taken the place of traditional emoticons in the form of icons. Emoticons can generally be divided into two groups: Western or Horizontal (mainly from America and Europe), and Eastern or Vertical (mainly from east Asia). Western The emoticon in Western style is written most often from left to right as though the head is rotated counter-clockwise 90 degrees. Eastern Eastern emoticons generally are not rotated, and may include non-Latin characters to allow for additional complexity. Unicode characters References
Linear format equations and Math AutoCorrect in Word 2010 - Word - Microsoft... To insert an equation using the keyboard, press ALT+=, and then type the equation. You can insert equation symbols outside a math region by using Math AutoCorrect. For more information, see Use Math AutoCorrect rules outside of math regions check box. In this article Type equations in linear format You can type most equations quickly by using Math AutoCorrect codes. \eqarray(x+1&=2@1+2+3+y&=z@3/x&=6)<space> which resolves to this: Here are some other examples: Note When an example is followed by two consecutive spaces, the first space resolves the typed text into the equation, and the second space builds it up. Microsoft Office uses the linear format described in Unicode Technical Note 28 to build up and display mathematical expressions. Math AutoCorrect symbols Type one of the following codes followed by a delimiting term. Important The codes are case-sensitive. Note For information on inserting a symbol that is not in the chart above, see Insert a symbol or special character.
Bicycle Maintenance Guide and Riding Tips This page was last updated 24 May 2007. I often get asked about bicycle maintenance and repairs, and tips for how to ride efficiently. This little manual is intended as a summary of what I have learned over the years. Whats Special About This Number? What's Special About This Number? If you know a distinctive fact about a number not listed here, please e-mail me. primes graphs digits sums of powers bases combinatorics powers/polygonal Fibonacci geometry repdigits algebra perfect/amicable pandigital matrices divisors games/puzzles 0 is the additive identity . 1 is the multiplicative identity . 2 is the only even prime . 3 is the number of spatial dimensions we live in. 4 is the smallest number of colors sufficient to color all planar maps. 5 is the number of Platonic solids . 6 is the smallest perfect number . 7 is the smallest number of sides of a regular polygon that is not constructible by straightedge and compass. 8 is the largest cube in the Fibonacci sequence . 9 is the maximum number of cubes that are needed to sum to any positive integer . 10 is the base of our number system. 11 is the largest known multiplicative persistence . 12 is the smallest abundant number . 13 is the number of Archimedian solids . 17 is the number of wallpaper groups .
Gothic Architecture Pictures All text and pictures © QT Luong. See conditions for use of pictures. There are 28 pictures on this page out of 228 pictures of Gothic Architecture. cgi-bin Matrix Solver Solving a linear equation system of up to 20 unknowns. If you need some help please scroll down to the example. If not, fill the 2 boxes below , then click on the "Go" button. Example As an example, let's say you have the following 3 equations to solve for the unknowns x , y , and z : 2x + 3y + 1/3z = 10 3x + 4y + 1z = 17 2y + 7z = 46 To enter the above system into the matrix solver you enter the number "3" into the small box for the number of unknowns/equations. Into the big box for the coefficients you enter the following numbers : 2 3 1/3 1.0e+1 3 4 1 17 0 2 7 46.0 Notice that each row represents one equation. Note, that for the coefficients you may enter either whole numbers ( like 2 ), fractions of whole numbers ( like 1/3 ), numbers with a decimal point ( like 46.0 ), or numbers in scientific notation ( 1.0e+01 which is the same as 10 ). After entering all numbers click on the "Go" button. You may check the solution : Which checks out.
Eco-friendly Gallery | Environment Team Place Value Number Bases Place Value, Groups of Tens / Hundreds, Number Bases Suitability comments on Main Reader Page ► = Our family's favorites Y = for the youngest kidsTo print, click on the printer icon at the bottom of the list 12 Ways to Get to 11 by Eve Merriam Alien Math by Marya Washington Tyler - number bases Base Five, (Young Math Books) by David Adler. Binary Numbers (Young Math Books) by Clyde Watson Counting Systems: The Familiar and the Unusual Luce, Marnie/Stenson, Charles - Lots of practice with number bases in this one. Hello Math Readers: 512 Ants On Sullivan Street (Level 4) by Losi, L. – by Carol A. Skip-counting to 100 by 2s, 5s, 10s and 20's / Monster Math Picnic (level 1) Grace Maccarone The History of Counting by Denise Schmandt-Besserat How to Count Like a Martian (upper elem level) by Glory St. The King's Chessboard ► Birch, David/Grebu. is a similar tale with beautiful artwork. MathStart Readers by Stuart Murphy: Earth Day--Hooray! Qualities of 100 Millions of Cats by Wanda Gag, this book is a classic