|☎∈ Animation of the simplest tensegrity structure.|
|☎∈ Animation of a simple tensegrity structure.|
☎∈ Visualisation of composition by volume of Earth's atmosphere. Data is from NASA Langley: http://www.nasa.gov/centers/langley/pdf/245893main_MeteorologyTeacherRes-Ch2.r4.pdf .
☎∈ Visualisation of the distribution (by volume) of water on Earth. Each tiny cube (such as the one representing biological water) corresponds to approximately 1000 cubic km of water, with a mass of approximately 1 trillion tonnes (200000 times that of the Great Pyramid of Giza or 5 times that of Lake Kariba, arguably the heaviest man-made object). The entire block comprises 1 million tiny cubes. Data is from http://ga.water.usgs.gov/edu/waterdistribution.html .
☎∈ In this geometric visualisation, the value at the green circle multiplied by the distance between the red and blue circles is equal to the sum of the value at the red circle multiplied by its distance to the blue circle, and the value at the blue circle multiplied by its distance to the red circle.
☎∈ Comparison of probability density functions, p(k) for the sum of n fair 6-sided dice to show their convergence to a normal distribution with increasing n, in accordance to the central limit theorem. In the individual probability distribution functions, the minima, maxima and mods are labelled. In the bottom-right graph, smoothed profiles of the previous graphs are rescaled, superimposed and compared with a normal distribution, shown in black.
☎∈ Estimated and projected populations of the world and its inhabited continents from 1950 to 2100. The shaded regions correspond to range of projections by the United Nations Department of Economic and Social Affairs; for example, it estimates that the world population will reach 8 billion between 2022 and 2035.
☎∈ Plot of Voyager 2's heliocentric velocity against its distance from the sun, illustrating the use of gravity assist to accelerate the spacecraft by Jupiter, Saturn and Uranus. To observe Triton, Voyager 2 passed over Neptune's north pole resulting in an acceleration out of the plane of the ecliptic and reduced velocity away from the sun.
Other original drawings
☎∈ Illustration of autofocus using phase detection. In each figure, the purple circle represents the object to be focused on, the red and green rays represent light rays passing through apertures at the extreme sides of the lens, the yellow rectangle represents sensor arrays (one for each aperture), and the graph represents the intensity profile as seen by each sensor array. Figure 1 to 4 represent conditions where the lens is focused (1) too near, (2) correctly, (3) too far and (4) way too far. It can be seen from the graphs that the phase difference between the two profiles can be used to determine not just in which direction, but how much to change the focus to achieve optimal focus. Note that in reality, the lens moves instead of the sensor. Colours are used purely for clarity and do not represent any particular wavelength.
☎∈ Trajectories of projectiles launched at different elevation angles but the same speed of 10 m/s in a vacuum and uniform downward gravity field of 10 m/s2. Points are at 0.05 s intervals and length of their tails is linearly proportional to their speed. t = time from launch, T = time of flight, R = range and H = highest point of trajectory (indicated with arrows).
☎∈ Images of the black letters in an ideal convex lens of focal length f are shown in red. Selected rays are shown for letters E, I and K in blue, green and orange, respectively. Note that E (at 2f) has an equal-size, real and inverted image; I (at f) has its image at infinity; and K (at f/2) has a double-size, virtual and upright image.
☎∈ Comparison of approximate profiles of some pyramidal or near-pyramidal buildings. Where the base is an oblong, the longer side is shown. Dotted lines indicate original heights, where data is available.
☎∈ Five-set Venn diagram using congruent ellipses in a radially symmetrical arrangement devised by Branko Grünbaum. Labels have been simplified for greater readability; for example, A denotes A ∩ Bc ∩ Cc ∩ Dc ∩ Ec (or A ∩ ~B ∩ ~C ∩ ~D ∩ ~E), while BCE denotes Ac ∩ B ∩ C ∩ Dc ∩ E (or ~A ∩ B ∩ C ∩ ~D ∩ E).
Comparison of a knock-out with and without trapping, and overprinting for perfect and imperfect registration. Rows are as follows:
1. The cyan (lighter) plate,
2. The magenta (darker) plate,
3. Result with perfect registration (some monitors show slight misalignment), and
4. Result with imperfect registration.
☎∈ How Gerrymandering can influence electoral results on a non-proportional system.
Example for a state with 3 equally sized districts, 15 voters and 2 parties: Plum (squares) and Orange (circles).
In (a), creating 3 mixed-type districts yields a 3–0 win to Plum — a disproportional result considering the state-wide 9:6 Plum majority.
In (b), Orange wins the urban district while Plum wins the rural districts — the 2-1 result reflects the state-wide vote ratio.
In (c), gerrymandering techniques ensure a 2-1 win to the state-wide minority Orange party.
SVG with embedded bitmap, designed to be easily translated into different languages
☎∈ Map of notable volcanic eruptions. The apparent volume of each bubbles is linearly proportional to the volume of tephra ejected (i.e. their radius is linearly proportional to the cube root of the volume of tephra ejected), colour-coded by time of eruption as in the legend. Pink lines denote convergent boundaries, blue lines denote divergent boundaries and yellow spots denote hotspots. The dashed circle shows the equivalent ejection from the Chicxulub impact (200000+ km³).
☎∈ Schematic view of Olympus Mons, Mars : Comparison of Olympus Mons with the highest mountains on Earth. In front of the central part of Olympus Mons are shown the largest terrestrial volcanic mountain, the island of Hawaii in the Pacific with its undersea pedestal, and the Mount Everest massif of the Himalayas.
☎∈ Manhattanhenge map of Manhattan Island, New York City (latitude approximately 40° N) centered on the intersection of Park Avenue and 34th Street, with times and directions of sunsets (solid line) and sunrises (dotted line) in 2011. Times marked with "*" have been adjusted for daylight saving. The purple, pink and green arrows correspond approximately to the summer solstice, equinoxes and winter solstice, respectively.
☎∈ Orbits and directions of travel of the planets, Pluto, Ceres and Halley's Comet, viewed perpendicular to the ecliptic directly above the Sun. Their positions correspond to their configuration during the 5–6 June 2012 transit of Venus. Constellation names correspond to constellations on the ecliptic in the given directions. In the full SVG image, brighter parts of orbits are nearer to the viewer than the ecliptic and darker parts are farther. Planets' sizes are to scale and distances are roughly to (a different) scale. (Uses stroke-dashoffset and stroke-dasharray to shade parts of ellipses.)
Other processed images
☎∈ A squircle (blue) compared with a rounded square (red). A squircle is a mathematical curve defined by the equation x4+y4=r4, while a rounded square is four 90° circular arcs of the same radius connected by tangent straight lines. In this construction, the two curves are arranged to coincide at angles which are multiples of 45° (i.e. 0°, 45°, 90°, 135° etc.).
- Graham T. Smith (2002). Industrial metrology. Springer. p. 253. ISBN 1852335076. More than one of
- Geometric altitude vs. temperature, pressure, density, and the speed of sound derived from the 1962 U.S. Standard Atmosphere.
- The World Bank - Life expectancy at birth, total (years)
- World Population Prospects, the 2010 Revision
- IMF World Economic Outlook database
- Basics of space flight: Interplanetary Trajectories
- "SINFONI in the Galactic Center: Young Stars and Infrared Flares in the Central Light-Month" by Eisenhauer et al, The Astrophysical Journal, 628:246-259, 2005
- Galal Abada, "2004 On Site Review Report: Petronas Office Towers, Kuala Lumpur, Malaysia"
- Note: The 2:1 pixel pattern in the near-isometric image allows smoother lines than in the isometric one.