Clocks
Metric (or Decimalized) Time The day is divided into 100 parts (centidays), plus decimal fraction. Think of it as a percent of the day. The "Universal Metric Time" is based on the International Date Line. Hexadecimal Time The day is divided up into 65536 parts and written in hexadecimal (base-16) notation (A=10, B=11 ... Much more information about this can be found at Intuitor Hexadecimal Headquarters. Octal Time Octal Time uses a base-8 system (digits 0-7). Base64 Time Base-64 uses ASCII characters (in ascending order: A-Z, a-z, 0-1, +, and /). Binary Time Like hexadecimal time, the day is divided into 65536 parts, only we display it as a binary number using squares for bits, here using dark squares to represent 1 and white for 0. This can be viewed as a variation of hexadecimal time by dividing it into four 2x2 blocks of squares, each block corresponds to a digit of hexadecimal time. Mayan Time
Sortable Color Table | JavaScript Examples
The table shown below represents the named colors that form part of CSS Color Module Level 3, derived from the SVG 1.0 specification. Each color is depicted in a row, with a 1) color swatch, 2) its standardized name, 3) its hue, saturation, and lightness (according to the HSL color space), 4) its representation as an HSL-formatted CSS style property value, 5) its red, green, and blue channel levels (according to the sRGB color space), and 6) its hex formatted RGB value. What makes the table most compelling is that it is sortable by any one of the colors' properties, so you can get a sense of how properties such as hue, saturation, lightness, red level, etc. relate to different colors by sorting on those properties - in either ascending or descending order.
BELT DRIVE TURNTABLE Philips Thorens Verdier Melco Micro Mercure NOTES DIY
Mr. Yamamura and the Melco Turntables A few years earlier, in 1981, I stumbled upon the Melco turntables which were for the first time on display in Paris. I had an interesting conversation with Mr. Yamamura. With his firm Belco in London he imported these heavy turntables which boasted of platters weighing which boasted of platters weighing up to 35 kg. Platter Damping and Constant Speed In the process Alexander and I had experienced all sorts of construction problems that needed specific solutions: damping, decoupling, mechanical and acoustical feedback, constant speed, etc.
Color Psychology
by David Johnson Like death and taxes, there is no escaping color. It is ubiquitous. Yet what does it all mean? Colors often have different meanings in various cultures. Black Black is the color of authority and power. White Brides wear white to symbolize innocence and purity. Red The most emotionally intense color, red stimulates a faster heartbeat and breathing. The most romantic color, pink, is more tranquilizing. Blue The color of the sky and the ocean, blue is one of the most popular colors. Green Currently the most popular decorating color, green symbolizes nature. Yellow Cheerful sunny yellow is an attention getter. Purple The color of royalty, purple connotes luxury, wealth, and sophistication. Brown Solid, reliable brown is the color of earth and is abundant in nature. Colors of the Flag In the U.S. flag, white stands for purity and innocence. Food for Thought While blue is one of the most popular colors it is one of the least appetizing.
Geometry of the Universe
Can the Universe be finite in size? If so, what is ``outside'' the Universe? The answer to both these questions involves a discussion of the intrinsic geometry of the Universe. At this point it is important to remember the distinction between the curvature of space (negative, positive or flat) and the toplogy of the Universe (what is its shape = how is it connected). There are basically three possible shapes to the Universe; a flat Universe (Euclidean or zero curvature), a spherical or closed Universe (positive curvature) or a hyperbolic or open Universe (negative curvature). All three geometries are classes of what is called Riemannian geometry, based on three possible states for parallel lines always divergent (hyperbolic) or one can think of triangles where for a flat Universe the angles of a triangle sum to 180 degrees, in a closed Universe the sum must be greater than 180, in an open Universe the sum must be less than 180.
HTML Colors
1242a - VISTA gigapixel mosaic of the central parts of the Milky Way
This striking view of the central parts of the Milky Way was obtained with the VISTA survey telescope at ESO’s Paranal Observatory in Chile. This huge picture is 108 200 by 81 500 pixels and contains nearly nine billion pixels. It was created by combining thousands of individual images from VISTA, taken through three different infrared filters, into a single monumental mosaic. These data form part of the VVV public survey and have been used to study a much larger number of individual stars in the central parts of the Milky Way than ever before. This image is too large to be easily displayed at full resolution and is best appreciated using the zoom tool. Credit: ESO/VVV Survey/D.
Light & The Eye
• scotopic or dim light adapted rods (denoted by V' and containing the photopigment rhodopsin), most sensitive to "green" wavelengths at around 505 nm • short wavelength or S cones, containing cyanolabe and most sensitive to "blue violet" wavelengths at around 445 nm. • medium wavelength or M cones, containing chlorolabe and most sensitive to "green" wavelengths at around 540 nm • long wavelength or L cones, containing the photopigment erythrolabe and most sensitive to "greenish yellow" wavelengths at around 565 nm As the figure shows, there is a large number of differences between rhodopsin (taken as baseline) and the S photopigment, and a similarly large number of differences between the S and M photopigments. Photopigments do not catch light particles the way a bucket catches rain. Measuring Photoreceptor Light Sensitivity. Four kinds of spectra were obtained with four distinct absorptance peaks at 420, 495, 530 and 560 nm. Five Views of the Cone Fundamentals. 1. 2. 3. 4. 5.
10 Enormous Numbers
Technology One of the first questions that kids often ask is “What is the biggest number?” This question is an important step in transitioning to a world of abstract concepts. Ten to the eightieth power – a 1 with 80 zeros after it – is quite massive but somewhat tangible at least from a relatively concrete point of view. The word googol, with a slightly different spelling, has become a frequently used verb in modern times, thanks to a highly popular search engine. Mental Calculator Alexis Lemaire set a world record for calculating the 13th root of a 100 digit number, the 13th root of 8,192 is 2, or 2 times itself thirteen times, 100 digit numbers are googols, one of the numbers that Lemaire had calculated would have read (3 googol, 893 Duotrigintillion, ext, ext.) A Plank length is extremely small, approximately 1.616199 x 10-35 meters, or in long form 0.00000000000000000000000000000616199 meters. Poincare Recurrence Time Sorry, had to do it.
Murphy Laws
