His mathematical work centred on combinatorics and he was one of the early writers on probability, republishing Huygens's work on dice with helpful explanations.

Physicists assumed, morever, that like mechanical waves, light waves required a medium for propagation, and thus required Huygens's idea of an aether " gas " permeating all space.

In 1717 the Royal Society lent Pound Huygens's 123-foot object-glass, which he set up in Wanstead Park.

He published his solution in the journal in May of the following year, and noted that the solution is the same curve as Huygens's tautochrone curve.

" He published Of the Laws of Chance in 1692, translated from Christian Huygens's De ratiociniis in ludo aleae.

This meant that a clock set by Huygens's tables would be consistently about 15 minutes slow on mean time.

There was also a long wooden spear and a woomera, a spear-throwing device which gives the spear an enormous velocity and high accuracy.

The result was that by secret agreement draft machinery was actually ready long before the country knew that the device was to take the place of the volunteering method which Theodore Roosevelt favored.

In one of these, an exploding-wire device to study systems thermodynamically up to 6,000 Af and 100 atmospheres pressure, a major goal was achieved.

A project for the Air Force has been completed in which the NAIR infrared detecting device was developed for area monitoring of noxious or dangerous gases.

The deep concave gradient employed ( fig. 2 ) was obtained with a nine-chambered gradient elution device ( `` Varigrad '', reference ( 8 ) ) and has been described elsewhere.

Although the Taylor Scale was designed as a group testing device, in this study it was individually administered by psychologically trained workers who established rapport and assisted the children in reading the items.

In the field of entertainment there is no spur to financial daring so effective as audience boredom, and the first decade of the new device was not over before audiences began staying away in large numbers from the simple-minded, one-minute shows.

I couldn't see him, but the electric bugging device gave steady beeps when it was straight ahead, short half beeps when the car I was following was to the left, and long drawn-out beeps when it turned to the right.

Police laboratory technicians said the explosive device, containing either TNT or nitroglycerine, was apparently placed under the left front wheel.

As a simple, cheap and reliable device, the Russian abacus was in use in all shops and markets throughout the former Soviet Union, and the usage of it was taught in most schools until the 1990s.

Babbage's first attempt at a mechanical computing device, the Difference Engine, was a special-purpose calculator designed to tabulate logarithms and trigonometric functions by evaluating finite differences to create approximating polynomials.

Table-sized instead of room-sized, the device was capable of calculating tables but imperfectly.

The Atanasoff – Berry Computer ( ABC ) was the first electronic digital computing device.

He is well known as the lover of Aphrodite, the goddess of love who was married to Hephaestus, god of craftsmanship, but the most famous story involving the couple shows them exposed to ridicule through the wronged husband's clever device.

In the years following the Revolution the poetic device " Columbia " was used as a symbol of both Columbus and America, King's College of New York changed its name in 1792 to Columbia, and the new capitol in Washington was subtitled District of Columbia.

Robert Graves in The Greek Myths ( 1955 ; 1960 ) asserts that the ægis in its Libyan sense had been a shamanic pouch containing various ritual objects, bearing the device of a monstrous serpent-haired visage with tusk-like teeth and a protruding tongue which was meant to frighten away the uninitiated.

Atlas Autocode's syntax was influenced by the output device which the author had available, a Friden Flexowriter.

The cartridge was intended as a pass-through device ( similar to the later Game Genie ).

Literal flatness now tends to assert itself as the main event of the picture, and the device boomerangs: the illusion of depth is rendered even more precarious than before.

Le Guin states that she derived the name from " answerable ," as the device would allow its users to receive answers to their messages in a reasonable amount of time, even over interstellar distances.

In fact anode polarity depends on the device type, and sometimes even in which mode it operates, as per the above electric current direction-based universal definition.

The flow of electrons is always from anode to cathode outside of the cell or device, regardless of the cell or device type and operating mode, with the exception of diodes, where electrode naming always assumes current in the forward direction ( that of the arrow symbol ), i. e., electrons flow in the opposite direction, even when the diode reverse-conducts either by accident ( breakdown of a normal diode ) or by design ( breakdown of a Zener diode, photo-current of a photodiode or solar cell ).

The correspondence between these values and the physical states of the underlying storage or device is a matter of convention, and different assignments may be used even within the same device or program.

Although positively charged cations always move towards the cathode ( hence their name ) and negatively charged anions move away from it, cathode polarity depends on the device type, and can even vary according to the operating mode.

For example, CP / M used a command syntax similar to RT-11's, and even retained the awkward PIP program used to copy data from one computer device to another.

Cervantes's meta-fictional device was to make even the characters in the story familiar with the publication of Part One, as well as with an actually published fraudulent Part Two.

Inefficiency comes not just from the fact that the device is always conducting to some extent ( that happens even with class AB, yet its efficiency can be close to that of class B ); it is that the standing current is roughly half the maximum output current ( although this can be less with square law output stage ), together with the problem that a large part of the power supply voltage is developed across the output device at low signal levels ( as with classes AB and B, but unlike output stages such as class D ).

Hereby the stylistic device of dialogue met with his intention of looking at a thought from different angles and searching for elements of truth even in the arguments made by his opponents.

The full-scale device built on this basis established the effectiveness of the mechanism's design, even with the simple materials and techniques available to the Byzantines.

Gilbert had referred to the new technology in Pinafore in 1878, only two years after the device was invented and before London even had telephone service.

Handles made of shock-absorbing materials or varying angles attempt to make it easier for the user to continue to wield this age-old device, even as nail guns and other powered drivers encroach on its traditional field of use.

There is even a device available that will detect changes in jacket thickness and internal voids in jacketed rifle bullets, though its high cost makes it prohibitively expensive for all but the most dedicated shooters.

Through the early history of Unix, kernels were generally small, even though those kernels contained device drivers and file system managers.

It has been shown in the meantime that user-level device drivers can come close to the performance of in-kernel drivers even for such high-throughput, high-interrupt devices as Gigabit Ethernet.

The novel begins with Deckard feeling alienated from his bed-ridden wife, Iran, who misuses her mood organ device, intended to keep the population in even temper, by dialing the depression setting daily.

Bayesian methods would suggest that one hypothesis was more probable than the other, but individual Bayesians might differ about which was the more probable and by how much, by virtue of having used different priors ; but that's the same thing as disagreeing on significance levels, except significance levels are just an ad hoc device which are not really a probability, while priors are not only justified by the rules of probability, but there is definitely a normative methodology to define beliefs ; so even if a Bayesian wanted to express complete ignorance ( as a frequentist claims to do but does it wrong ), they could do it with the maximum entropy principle.

The necessary keys are usually too large to memorize ( but see proposal Passmaze ) and must be stored on a local computer, security token or portable memory device, such as a USB flash drive or even floppy disk.

There were no specific input or output instructions ; the PDP-11 used memory-mapped I / O and so the same move instruction was used ; orthogonality even enabled moving data directly from an input device to an output device.