Polynomial roots finder. Home. Spirals. Belousov's Brew. A recipe for making spiraling patterns in chemical reactions. Equiangular spiral. Properties of Bernoulli's logarithmic 'spiralis mirabilis'. Fermat's spiral and the line between Yin and Yang. Spiral tower. From the Geometry Junkyard, computational and recreational geometry pointers.Send email if you know of an appropriate page not listed here.David Eppstein, Theory Group, ICS, UC Irvine.Semi-automatically filtered from a common source file. A Whirlwind Tutorial on Creating Really Teensy ELF Executables for Linux. (or, "Size Is Everything") She studied it carefully for about 15 minutes. Finally, she spoke. "There's something written on here," she said, frowning, "but it's really teensy. " [Dave Barry, "The Columnist's Caper"] If you're a programmer who's become fed up with software bloat, then may you find herein the perfect antidote.
This document explores methods for squeezing excess bytes out of simple programs. Please note that the information and examples given here are, for the most part, specific to ELF executables on a Linux platform running under an Intel-386 architecture. Please also note that if you aren't a little bit familiar with assembly code, you may find parts of this document sort of hard to follow. In order to start, we need a program. Let's take an incredibly simple program, one that does nothing but return a number back to the operating system. So, here is our first version: /* tiny.c */ int main(void) { return 42; } which we can compile and test like so: $ gcc -Wall tiny.c $ . So. Genaille–Lucas rulers. History[edit] In 1885, French mathematician Édouard Lucas posed an arithmetic problem during a session of the Académie française. Genaille, already known for having invented a number of arithmetic tools, created his rulers in the course of solving the problem.
He presented his invention to the Académie française in 1891. The popularity of Genaille's rods was widespread but short-lived, as mechanical calculators soon began to displace manual arithmetic methods.[1] Appearance[edit] A full set of Genaille–Lucas rulers consists of eleven strips of wood or metal. Multiplication[edit] By arranging these rulers in the proper order, the user can solve multiplication problems. Consider multiplying 52749 by 4. The second multiplicand is 4, so we look at the fourth row: We start from the top number in the last column of the selected row: The grey triangle points the way to the next number: We follow the triangles from right to left, until we reach the first column. Division[edit] Resources[edit] My First Eight Drains. My First Eight Drainsby drainer-wannabe Ninjalicious Meters below the busy streets above, a hidden concrete utopia snakes its way from the downtown core out beyond the suburbs.
Concrete pipes conduct our urban stormwater to strange fringe areas known as forests, meadows, riverbanks and seashores — a gallery of horrors collectively known as nature. In these unholy "natural" areas, the ground is covered with neither cement nor asphalt, and rainwater is allowed to fall directly onto the ground and soak into the earth at its own pace. Ironically, these primitive wildernesses are exactly the sort of places one must visit to find the grated entrances leading to storm drains. 1. 2. 3.
The grimy entrance to The Great Ajax Drain leads into a low-ceilinged rectangular section. 4. 5. 6. Up three flights of ladders in the second section of Metal Cave, one finds some entertaining graffiti. Both Limbo's entrance and its small side tunnels require some bodily contortion. 7. 8. 7 Man-Made Substances that Laugh in the Face of Physics. The universe is full of weird substances like liquid metal and whatever preservative keeps Larry King alive. But mankind isn't happy to accept the weirdness of nature when we can create our own abominations of science that, due to the miracle of technology, spit in nature's face and call it retarded.
That's why we came up with... #7. Ferrofluids What do you get when you suspend nanoparticles of iron compounds in a colloidal solution of water, oil and a surfactant? Did you guess Zima? The real answer is ferrofluids, though you should be proud if you just knew what "surfactant" was. A ferrofluid is a liquid that reacts to magnetic fields in trippy ways that make you think that science is both magical and potentially evil. Tell us that didn't look like the birth of the most sinister dildo ever. What happens is that when a magnetic field is applied to the fluid, the particles of iron compound inside align to it. What the Hell is it Used For? #6. Every once in a while, science rules. #5. Here Is a Fence that Will Give You Nightmares. Site.swf (application/x-shockwave-flash Object) Haiku Forge - Moments Lost in Time. Bizzare Google Request.
In General | 166 comments | permalink Here is a bizzare e-mail discussion I had with a guy who contacted me yesterday. xxxUPDATExxx I have posted the second part of this, you can view it here: Second bizarre email ——-Original Message——- From: xxxxx xxxxxxxxx Date: 12/8/2006 xx:xx:xx PM To: Dean Hunt Subject: DeanHunt.com Google Removal Request Hello Dean, My name is [edited] and I run [edited].com I have been running the site for over two years and we have been ranked very highly for the search term [edited]. On Thursday morning I checked our google positions and your site is now above us for this term. Please understand that we make our living from this, and you are just writing a blog that has nothing to do with [edited]. If you do not remove yourself from google for this search, then I will call them myself and have you removed. I expect a reply soon. Thankyou. [edited] [edited].com From: xxxxx xxxxxxxxx Date: 12/8/2006 xx:xx:xx PM To: [edited] Subject: Re: DeanHunt.com Google Removal Request.
Free Summarizer, an online automatic tool to summarize any text or article. Visualizations. Robust Models for Optic Flow Coding in Natural Scenes Inspired by Insect Biology. Citation: Brinkworth RSA, O'Carroll DC (2009) Robust Models for Optic Flow Coding in Natural Scenes Inspired by Insect Biology.
PLoS Comput Biol 5(11): e1000555. doi:10.1371/journal.pcbi.1000555 Editor: Lyle J. Graham, Université Paris Descartes, Centre National de la Recherche Scientifique, France Received: June 15, 2009; Accepted: October 2, 2009; Published: November 6, 2009 Copyright: © 2009 Brinkworth, O'Carroll. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Funding: The project was supported by grants from the Australian Research Council (LP0667744 and DP0986683) and the US Air Force Office of Scientific Research (FA 9550-04-1-0294).
Competing interests: The authors have declared that no competing interests exist. Introduction Models For Motion Detection Differential. Region or feature based matching. Forbidden Knowledge TV. 10,000 Shipping Containers Lost At Sea Each Year…Here’s a Look At One. We lose 10,000 of these things every year! (c) 2004 MBARI Right now, as you read this, there are five or six million shipping containers on enormous cargo ships sailing across the world’s oceans. And about every hour, on average, one is falling overboard never to be seen again. It’s estimated that 10,000 of these large containers are lost at sea each year, and our understanding of what happens to them afterwards is scant at best. But that’s changing.
The Med Taipei lost 15 containers in February of 2004. Shipping containers account for about 90% of the non bulk cargo transported in the world. While MBARI knows the location of one of the sunken containers from the Med Taipei, the other 14 are unaccounted for. So there’s tens of thousands of containers dropped in the ocean each year…what’s the problem? Beyond that, MBARI is discovering that the containers themselves, even if never breached, change the local environment.
Start-up to release 'stone-like' optical disc that lasts forever. News August 8, 2011 06:05 AM ET Recordable optical media such as CDs, DVDs and Blu-ray discs are made of layers of polycarbonate glued together. One layer of the disk contains a reflective material and a layer just above it incorporates an organic transparent dye. During recording, a laser hits the die layer and burns it, changing the dye from transparent to opaque creating bits of data.
A low power laser then can read those bits by either passing through the transparent dye layer to the reflective layer or being absorbed by the pits. Over long periods of time, DVDs are subject to de-lamination problems where the layers of polycarbonate separate, leading to oxidation and read problems. The dye layer, because its organic, can also break down over time, a process hastened by high temperatures and humidity. Gene Ruth, a research director at Gartner, said generally he's not heard of a problem with DVD longevity. Hitachi-LG Data Storage's M-Disc read-write player. Flying. Flying is also fun and challenging. You have to think and act in three dimensions. You have the freedom to move to a lot of new spots on the globe. You learn to examine and appreciate scenery and natural phenomena that you'd never be able or wouldn't bother to see from the ground.
Charles Lindbergh put it best: "Science, freedom, beauty, adventure. " Sadly Lindbergh was, in addition to being a great aviator, a supporter of the Nazis. In October 1938 he accepted the Service Cross of the German Eagle from Hermann Goering. On September 11, 1941, Lindbergh noted in a speech that "[The Jews'] greatest danger to this country lies in their large ownership and influence in our motion pictures, our press, our radio and our government. " Even if the end goal is soaring, you might want to try this some time. Happy to hear of your new interest, Phil.