Of All The People In All The World Of All The People In All The World, a traveling art exhibit in the UK, uses grains of rice to bring the large numbers behind world populations to the grasp of the average human being. In the exhibit, one grain of rice equals one person and those grains of rice are put together to represent all kind of statistics from the small (such as the number of people who have walked on the moon) to the large (the population of the United States as seen below). Link
Cryptographers chosen to duke it out in final fight - physics-math - 13 December 2010 A competition to find a replacement for one of the gold-standard computer security algorithms used in almost all secure, online transactions just heated up. The list of possibilities for Secure Hash Algorithm-3, or SHA-3, has been narrowed down to five finalists. They now face the onslaught of an international community of "cryptanalysts" – who will analyse the algorithms for weaknesses – before just one is due to be selected as the winner in 2012. The competition, which is being run by the US National Institute of Standards and Technology in Gaithersburg, Maryland, is a huge deal for cryptographers and cryptanalysts alike. Diversity of designs Hash algorithms turn files of almost any length into a fixed-length string of bits called a hash. So in 2007, NIST launched a competition to find a replacement. Submissions closed in 2008, by which time NIST had received 64 entries "of widely varying quality", says Burr. "We also gave some consideration to design diversity," he says. Recommended by
Phi 1.618 ø PHI: The Golden Ratio or Golden Section (In Nature, Art, Science and Religion) The Golden Section is a unique Ratio (or relationship between parts) that seems to be preferred by Nature as the best geometry for growth, energy conservation, elegance and has some fundamental relationships to the platonic solids and the Mandelbrot set. It was formally discovered by the Greeks and incorporated into their art and architecture, but it has been shown to occur even in prehistoric art, possibly as a function of Man's natural affinity for it's beauty. The rectangle at left has a vertical edge length of 1 the horizontal or width of the rectangle is 1.618 If we make a line inside and form a square (far left) it creates another 'golden rectangle' (at right) this subdivision continues inward in a spiral fashion tracing the form of a perfect PHI spiral seen in galaxies, seashells .... Even your hand, arm, ear, teeth, etc are in PHI Proportions!
Custom Maze Generator Make your own custom maze, just like Daedalus (only this should turn out better for you in the end). Print them out to amuse the kids on a rainy afternoon. It's easier than arts and crafts. Some samples: 1, 2, 3, 4, 5, 6, 7, 8, 9 Thinking Machine 4 Thinking Machine 4 explores the invisible, elusive nature of thought. Play chess against a transparent intelligence, its evolving thought process visible on the board before you. The artwork is an artificial intelligence program, ready to play chess with the viewer. Play the game. Image Gallery View a range of still images taken from Thinking Machine 4. About the work More information about the project and answers to common questions. Credits Created by Martin Wattenberg, with Marek Walczak. About the artists Martin Wattenberg's work centers on the theme of making the invisible visible. Marek Walczak is an artist and architect who is interested in how people participate in physical and virtual spaces.
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.
Ethiopian multiplication Ethiopian multiplication You are encouraged to solve this task according to the task description, using any language you may know. A method of multiplying integers using only addition, doubling, and halving. Method: Take two numbers to be multiplied and write them down at the top of two columns. In the left-hand column repeatedly halve the last number, discarding any remainders, and write the result below the last in the same column, until you write a value of 1. For example: 17 × 34 Halving the first column: Doubling the second column: Strike-out rows whose first cell is even: Sum the remaining numbers in the right-hand column: So 17 multiplied by 34, by the Ethiopian method is 578. The task is to define three named functions/methods/procedures/subroutines: one to halve an integer, one to double an integer, and one to state if an integer is even. Use these functions to create a function that does Ethiopian multiplication. References  ACL2  ActionScript Output: ex.  Ada Output:
Welcome to Jérôme DESMOULINS Website Welcome to Jérôme DESMOULINS website Office / School Paper Pages Generator (grid, graph paper, ...) ASCII Art ASCII Banner Generator Graphics Web page title's Generator Games Computers School Go Back Scientists discover snowflake identical to one which fell in 1963 Scientists were today able to dispel the age-old belief that no two snowflakes are the same, using state of the art microscopy and by catching flakes as they fell in specially designed equipment while sitting at a table outside a pub in Norwich. The team of researchers, backed by a £20m grant, were able to make an identical match to the famous Bentley flake, photographed 47 years ago by amateur snowflakeologist Wilson Bentley. ‘It’s one of the last remaining challenges known to science and we’ve cracked it at last,’ said lead researcher, Professor Kenneth Libbrecht. ‘The team will soon disband to pursue other major scientific challenges, such as the unresolved toast-butter conundrum, and whether or not my baldness makes me a better lover.’ The scientists then ordered another round and considered the futility of existence, an activity for which they also receive a grant worth twice the GDP of Tonga. Picture by larryharry Click to send this story to a friend