Initially it was conceived as a difference engine curved back upon itself, in a generally circular layout, with the long store exiting off to one side.

Swedish engineers Georg and Edvard Scheutz, inspired by a description of the difference engine, created a mechanical calculation device based on the design in 1853.

The world's first computer printer was a 19th century mechanically driven apparatus invented by Charles Babbage for his difference engine.

In 1991, a perfectly functioning difference engine was constructed from Babbage's original plans.

Nine years later, the Science Museum completed the printer Babbage had designed for the difference engine.

Any resulting difference in speed between the engine and gearbox is evened out as the clutch slips slightly during re-engagement.

The operation of a heat engine is based on a difference in temperature that is converted to a mechanical output.

The difference can be heard as the flat-plane crankshafts result in the engine having a smoother, higher-pitched sound than cross-plane ( for example, IRL IndyCar Series compared to NASCAR Nextel Cup, or a Ferrari 355 compared to a Chevrolet Corvette ).

The London Science Museum ( London ) | Science Museum's difference engine, built from Babbage's design.

A difference engine is an automatic mechanical calculator designed to tabulate polynomial functions.

Both logarithmic and trigonometric functions, functions commonly used by both navigators and scientists, can be approximated by polynomials, so a difference engine can compute many useful sets of numbers.

Closeup of the London Science Museum's difference engine showing some of the number wheels and the sector gears between columns.

Per Georg Scheutz's third difference engine

The British government was interested, since producing tables was time consuming and expensive and they hoped the difference engine would make the task more economical.

The other issue that undermined the government ’ s confidence in the difference engine was Babbage had moved on to an analytical engine.

By developing something better, Babbage had rendered the difference engine useless in the eyes of the government.

Babbage was able to take advantage of ideas developed for the analytical engine to make the new difference engine calculate more quickly while using fewer parts.

Inspired by Babbage's difference engine plans, Per Georg Scheutz built several difference engines from 1855 onwards, one of which was sold to the British government in 1859.

This work lead the Science Museum to construct a working difference engine No. 2 from 1989 to 1991, under Doron Swade, the then Curator of Computing.

In 2000, the printer which Babbage originally designed for the difference engine was also completed.

The difference engine and printer were constructed to tolerances achievable with 19th-century technology, resolving a long-standing debate whether Babbage's design would actually have worked.

Looking at the image above, one might wonder whether adequate account has been taken of the difference in curvature between ρ ( s ) and ρ ( s + ds ) in computing the arc length as ds = ρ ( s ) dθ.

A further difference is that, historically, members of the programmer subculture of hackers were working at academic institutions and used the computing environment there.

The only difference is that as a first step, before computing the Nim-sums, we must reduce the sizes of the heaps modulo k + 1.

Since the probability amplitudes of the states are represented with complex numbers, the phase between any two states is a meaningful parameter, which is a key difference between quantum computing and probabilistic classical computing.

To illustrate how one may use Newton's formula in actual practice, consider the first few terms of the Fibonacci sequence f = 2, 2, 4 ... One can find a polynomial that reproduces these values, by first computing a difference table, and then substituting the differences which correspond to x < sub > 0 </ sub > ( underlined ) into the formula as follows,

IGRP uses the same basic formula for computing the overall metric, the only difference is that in IGRP, the formula does not contain the scaling factor of 256.

The main difference was not one of actual computing performance on the coprocessor, but a lack of instruction pipelining.

In the past, the price difference between the two models has favored " scale up " computing for those applications that fit its paradigm, but recent advances in virtualization technology have blurred that advantage, since deploying a new virtual system over a hypervisor ( where possible ) is almost always less expensive than actually buying and installing a real one. Configuring an existing idle system has always been less expensive than buying, installing, and configuring a new one, regardless of the model.

With the fast technological development of computing the difference between local and distributed computing over low latency networks or buses is blurring.

" Key technological factors underlying this difference in kind in the computer, network and information technologies are: filtered hypertext, ubiquitous web / computing, continuous internet connectivity, cheap, efficient and small electronics, content syndication strategies ( RSS ) and others.

In either case, the positions are ' marked-to-market ' by setting their new cost to the market value used in computing this difference.

The lift force can be related directly to the average top / bottom velocity difference without computing the pressure by using the concept of circulation and the Kutta-Joukowski theorem .< ref >" If the body is shaped, moved, or inclined in such a way as to produce a net deflection or turning of the flow, the local velocity is changed in magnitude, direction, or both.

Discretization is also concerned with the transformation of continuous differential equations into discrete difference equations, suitable for numerical computing.

In general, computing the phase difference would involve computing the arcsine and arccosine of each normalized input ( to get an ever increasing phase ) and doing a subtraction.

The formal procedure for computing the difference of functions evaluated on nearby paths is a generalization of the derivative known from differential calculus, and is termed the calculus of variations.

These techniques involve processing one or more raster layers according to simple rules resulting in a new map layer, for example replacing each cell value with some combination of its neighbours ’ values, or computing the sum or difference of specific attribute values for each grid cell in two matching raster datasets.

The key difference between a classical animation and a demo is that the display of a demo is computed in real time, making computing power considerations the biggest challenge.

A final difference between computer-supported collaboration and classic " computing " is that a computer typically remains a closed system, focusing only on what is already " inside the box ", and only dealing with it in an abstract or mental fashion.

This inclusion of both active sensors and active " effectors " is again a difference from " computing " that, at a minimum, makes this field at least as complex as " robotics ".

This is a major difference from server-based computing, which supports multiple users simultaneously using an application hosted on one discrete server ( be it a discrete piece of hardware or a discrete virtual machine on a server ).

Cellular neural networks ( CNN ) are a parallel computing paradigm similar to neural networks, with the difference that communication is allowed between neighbouring units only.