X-Nico

3 unusual facts about Ratio


Cross-ratio

The English term "cross-ratio" was introduced in 1878 by William Kingdon Clifford.

Dirk Struik (1953) Lectures on Analytic and Projective Geometry, page 7, Addison-Wesley.

Ratio

The discovery of a theory of ratios that does not assume commensurability is probably due to Eudoxus.


Advanced Silicon Etch

Advanced Silicon Etch (ASE) is a deep reactive ion etching (DRIE) technique to rapidly etch deep and high aspect ratio structures in silicon.

Anamorphic widescreen

MGM: "Enhanced for 16:9 TVs" or "Enhanced for Widescreen TVs;" includes aspect ratio since 2001; uses Fox’s format since 2004.

Arthur Ernest Bishop

These were significant and partly as a result, he was able in 1954 to move to Detroit, Michigan, USA, with ideas and patents to improve steering systems for automobiles, and for the next two decades introduced improvements into various vehicles around the world mainly in aspects of hydraulically powered and variable-ratio steering.

Bacterial Filtration Efficiency

Kimberly-Clark uses a test procedure was where samples were challenged with a biological aerosol of Staphylococcus aureus and the results employ a ratio of the bacterial challenge counts to sample effluent counts, to determine percent bacterial filtration efficiency (%BFE).

Bob Gilmore

“Changing the metaphor: Ratio models of musical pitch in the work of Harry Partch, Ben Johnston, and James Tenney,” Perspectives of New Music 33, nos. 1 & 2 (Winter–Summer 1995): 458–503.

Borg-Warner T-5 transmission

TVR Tuscan with the option of a close ratio gearset on 1st, 2nd & 3rd gears for the Tuscan S

Cam Cameron

Cameron has also been widely praised for the development of RS Senior Quarterback Zach Mettenberger who had the best season of his LSU career with a 64.9% completion percentage, and a 22 to 8 Touchdown to Interception Ratio.

Canadian public debt

Harvard University economists Carmen Reinhart and Kenneth Rogoff warned about the dramatic risks entailed when public debt-to-GDP ratio exceeds 90 percent in their book entitled This Time is Different: Eight Centuries of Financial Folly (2009).

Car tuning

In a typical chemical reaction, the air-fuel ratio must be a minimum of 14:1 (see Stoichiometry).

Carbon planet

Carbon planets might also be located near the galactic core or globular clusters orbiting the galaxy, where stars have a higher carbon-to-oxygen ratio than the Sun.

Chandrasekhar number

The Chandrasekhar number is a dimensionless quantity used in magnetic convection to represent ratio of the Lorentz force to the viscosity.

Chaos Divine

Ratio was voted the best Australian metal release of 2006 by the shows presenter, Andrew Haug.

Chip tuning

In addition, changing fuel maps to coincide with the stoichiometric ratio for gasoline combustion may also realize performance increase.

Complex modulus

Dynamic modulus (materials engineering), the ratio of stress to strain under vibratory conditions.

Daimler Sovereign

In 1967 the final drive ratio was quietly changed from 3.31:1 to 3.54:1 which led to press complaints about fussier high speed cruising but which improved acceleration times from stand-still within the range of the speeds legal in Britain following the introduction, in December 1965, of a blanket 70 mph (113 km/h) speed limit across the nation's highways.

Diebuster

Also called Gunbuster 2, it is the direct sequel to Gunbuster, but is animated in a 16:9 widescreen aspect ratio, rather than the 4:3 aspect ratio used in the majority of Gunbuster.

Ernst Pringsheim, Sr.

(with Otto Lummer:) A Determination of the ratio k of the specific heat for air, oxygen, carbon-dioxide and hydrogen.

Europa XS

The Europa touring wing uses a unique Dykins 12% thickness/chord ratio airfoil designed by Donald H. Dykins, who had been deputy Chief Aerodynamicist at Hawker Siddeley Aviation, and later technical director of British Aerospace and chief aerodynamicist on the European Airbus.

Field of view in video games

If the monitor aspect ratio is different than the fixed aspect ratio the monitor will show black bars or stretch the image.

Fineness ratio

An example of a high-performance design with an imperfect fineness ratio is the Lancair.

Gazprom Neft

Based on an audit of reserves conducted by DeGolyer and MacNaughton and according to the Petroleum Resources Management System standards, the company's proven reserves at the end of 2012 totaled 1.2 billion tonnes of oil equivalent, and its reserve replacement ratio was over 286%.

Geometric mean

Applying the same geometric mean technique to 16:9 and 4:3 approximately yields the 14:9 (1.55\overline{5}...) aspect ratio, which is likewise used as a compromise between these ratios.

Golden mean

Golden ratio, a specific mathematical ratio (sometimes called golden mean)

Hispano-Suiza 12Y

The Armée de l'Air changed their nomenclature, so the next version was the Hispano-Suiza 12Y-21, which increased the compression ratio to 7:1, when running on 100 octane gasoline.

Ibrahim Index of African Governance

The gender subcategory includes five indicators measuring gender equality, the ratio of girls to boys in primary and secondary education, the primary school completion rate for girls, the proportion of women who are economically active, and the proportion of parliamentary seats held by women.

Jimmy Rutherford

Rutherford's goals per game ratio at Queens does however compare well against other prominent forwards to have played for Queens surpassing such as Dave Halliday, Billy Houliston, Jim Patterson, Neil Martin, Andy Thomson and Stephen Dobbie.

KSMS-TV

In June 2010, KSMS began broadcasting in 16:9 HDTV ratio in time for the 2010 FIFA World Cup, however, its newscasts remains in 4:3 ratio.

Load factor

Passenger load factor, the ratio of revenue passenger miles to available seat miles of a particular transportation operation (e.g. a flight)

Mathematics and architecture

Jay Hambidge believed that the golden rectangle was the ratio used by Attic Greek architects in the design of the Parthenon and other ancient Greek buildings, as well as sculptures, paintings, and vases.

Mitsubishi Eclipse

The 1995–1999 turbo engines were given an increased compression ratio of 8.5:1, up from 7.8:1, and a smaller turbo, a Garrett T25 in place of the previous Mitsubishi TD04-13G (automatic cars) and TD05-14B (manual cars).

Panasonic Lumix 7–14mm lens

While reviewers praise its image quality and constant f/ratio despite a small size, it is considered very expensive, especially after the introduction of the competing, even smaller Olympus M.Zuiko Digital ED 9-18mm f/4-5.6 lens.

Particle-in-cell

It is allowed to rescale the number of particles, because the Lorentz force depends only on the charge to mass ratio, so a super-particle will follow the same trajectory as a real particle would.

PlayStation Portable hardware

The Samsung (previously Sharp) branded TFT LCD screen measures 110 mm (4.3 in) diagonal with a 16:9 ratio and a 480×272 pixel resolution capable of 16.77 million colors.

Poverty in Canada

It is defined as a ratio with values between 0 and 1: the numerator is the area between the Lorenz curve of the distribution and the uniform distribution line; the denominator is the area under the uniform distribution line.

Power supply rejection ratio

But testing is not confined to DC (zero frequency); often an operational amplifier will also have its PSRR given at various frequencies (in which case the ratio is one of RMS amplitudes of sinewaves present at a power supply compared with the output, with gain taken into account).

Q value

Fusion energy gain factor Q, the ratio of fusion power produced in a reactor to the power required to maintain the plasma in steady state

Rivaroxaban

It was noted that the hazard ratio increased sharply as the center TTR rose to above 65%, and at a TTR above 67%, the hazard ratio crossed 1.0.

Rosser's equation

In economics, Rosser's equation (named after J. Barkley Rosser, Jr.) calculates future US Social Security Administration Trust Fund balances and payments as the ratio of benefit payments in real terms for a given income level to be received the year after the Trust Fund would be exhausted, to those of the same income level for an initial year.

Rotuman people

This can be attributed to the high ratio of Caucasians to Rotumans in the early days of exposure to white people, when Rotuma became a haven to mutineers and stow-aways who appreciated the beauty of the island and found prosperity as the trading advisers to local chiefs when dealing with Occidental ships.

Sawai Madhopur

All India Radio (AIR / Akashvani) Sawai Madhopur broadcast, local Ratio station -FM band (101.5 MHz) in the city.

Sharp-P-complete

Jerrum, Valiant, and Vazirani showed that every #P-complete problem either has an FPRAS, or is essentially impossible to approximate; if there is any polynomial-time algorithm which consistently produces an approximation of a #P-complete problem which is within a polynomial ratio in the size of the input of the exact answer, then that algorithm can be used to construct an FPRAS.

Solar inverter

Fill factor is defined as the ratio of the maximum power from the solar cell to the product of Voc and Isc.

Square root of 3

The shape Vesica piscis has a major axis: minor axis ratio equal to the square root of three, this can be shown by constructing two equilateral triangles within it.

SQuORE

Contract management may rely on code analysis to define levels of quality between contractors: e.g. cloning ratio, complexity of functions, specific ratings.

Strikeout-to-walk ratio

A pitcher that possesses a great K/BB ratio is usually a dominant power pitcher, such as Randy Johnson, Pedro Martínez, Curt Schilling, or Ben Sheets.

Wald test

The other reason is that the Wald test uses two approximations (that we know the standard error, and that the distribution is chi-squared), whereas the likelihood ratio test uses one approximation (that the distribution is chi-squared).


see also