* Flexagons — 1962 paper by Antony S. Conrad and Daniel K. Hartline ( RIAS )

* Flexagons is a good introduction, including a large number of links.

* Flexagons — Scott Sherman's site, with a bewildering array of flexagons of different shapes.

The formal displacement of the geocentric principle far from being Copernicus' primary concern, was introduced only to resolve what seemed to him intolerable in orthodox astronomy, namely, the ' unphysical ' triplication of centric reference-points: one center from which the planet's distances were calculated, another around which planetary velocities were computed, and still a third center ( the earth ) from which the observations originated.

As warmer temperatures were encountered Ann and Harriet were introduced to the pleasures of bathing daily in salt water.

After the Juniors were welcomed and congratulated for qualifying for the Finals of the Junior Class, Mrs. William H. Long, Jr. was introduced as the first speaker.

eleven others were introduced.

Hereford cattle were often called `` white faces '', or `` open-face cattle '', and the old-time cowman gave the name of `` hothouse stock '' to them newly introduced cattle.

The trio who shared the most-valuable honors were introduced by Bob Broeg, sports editor of the Post-Dispatch.

The Ionian School of philosophers were the first natural philosophers ( φυσιολόγοι: physiologoi ) who tried to explain phenomena according to non-supernatural laws, and Pythagoras introduced the abstract mathematical-relations which formed the basis of the science of mathematics.

( Rossum's Universal Robots ) ( 1921 ) – the play that introduced the word robot to the world – were organic artificial humans, the word " robot " has come to primarily refer to mechanical humans, animals, and other beings.

The Turkish language and the Islamic religion were gradually introduced as a result of the Seljuk conquest, and this period marks the start of Anatolia's slow transition from predominantly Christian and Indo-European and Semitic-speaking, to predominantly Muslim and Turkish-speaking ( Although some ethnic groups such as Armenians, Greeks, Assyrians and Georgians retained Christianity and their native languages ).

He was a pioneer in computer-generated art using Amiga computers that were introduced in 1985, just before his death in 1987.

During this period winter sports were slowly introduced: in 1882 the first figure skating championship was held in St. Moritz, and downhill skiing became a trendy sport with English visitors early in the 20th century, as the first ski-lift was installed in 1908 above Grindelwald.

Secret ballots were introduced, and a bicameral parliament was elected on 9 March 1857, by which time 109, 917 people lived in the province.

Electric street lighting was introduced in 1900 and electric trams were transporting passengers in 1909.

He was a cultivated patron of literature and art, and it was in his time that the first printing press authorized to use the Arabic or Turkish languages was set up in Constantinople, operated by Ibrahim Muteferrika ( while the printing press had been introduced to Constantinople in 1480, all works published before 1729 were in Greek, Armenian, or Hebrew ).

A variety of social, political and economic reforms were introduced by the Japanese government, in hope of modernising the country in the Western style, and included the annexation of Hokkaido.

Agathon introduced certain innovations into the Greek theater: Aristotle tells us in the Poetics that the characters and plot of his Anthos were original and not, following Athenian dramatic orthodoxy, borrowed from mythological subjects.

The Spotted Deer Axis axis, the Barking Deer and the sambar were all introduced to the Andaman islands, though the sambar did not survive.

The reason the digits are more commonly known as " Arabic numerals " in Europe and the Americas is that they were introduced to Europe in the 10th century by Arabs of North Africa, who were then using the digits from Libya to Morocco.

Arabic numerals were introduced to China during the Yuan Dynasty ( 1271 – 1368 ) by the Muslim Hui people.

In the early 17th century, European-style Arabic numerals were introduced by the Jesuits.

More foods were now available: feral goats – introduced by earlier sailors – provided him with meat and milk and wild turnips, cabbage, and black pepper berries offered him variety and spice.

As a framework for his coherent duality theory he also introduced derived categories, which were further developed by Verdier.

Modern warfare was born in this campaign -- periscopes, camouflage, booby traps, land mines, extended order, trench raids, foxholes, armored cars, night attacks, flares, sharpshooters in trees, interlaced vines and treetops, which were the forerunners of barbed wire, trip wires to thwart a cavalry charge, which presaged the mine trap, and the general use of anesthetics.

But Morgan did not leave before he had written a letter to a William Pickman in Salem, Massachusetts, apparently an acquaintance, praising Washington and saying that the slanders propagated about him were `` opposed by the general current of the people to exalt General Gates at the expense of General Washington was injurious to the latter.

If the new Soviet series has followed the general pattern of previous Russian tests, the shots were roughly half fission and half fusion, meaning a fission yield of 30 to 40 megatons thus far.

Tribal authorities, the chiefs and their secretaries, were held responsible for maintaining the registers of indigenous persons within their territories, under the general supervision of district officials.

The results of these inquiries were used to adjust compilations of data from the registers and to provide various ratios and rates by districts, including birth and death rates, general fertility rates, distributions by marital status, fertility of wives separately in polygynous and non-polygynous households, infant mortality, and migration.

They were inadequately financed, without experienced leadership, and lacked the general support of organized labor as a whole.

In a general way, psychiatrists were able to establish on a wide basis what many of them had always felt -- that the most telling cues in psychotherapy are acoustic, that such things as stress and nagging are transmitted by sound alone and not necessarily by words.

`` We were brought up that way '' was one statement which won general assent.

A stronger stand on their beliefs and a firmer grasp on their future were taken Friday by delegates to the 29th general council of the Assemblies of God, in session at the Memorial Coliseum.

The high casualty figures of the Union alarmed the North ; Grant had lost a third of his army, and Lincoln asked what Grant's plans were, to which the general replied, " I propose to fight it out on this line if it takes all summer.

The first Baptists – called " General Baptists " because of their confession of a " general " or unlimited atonement, were Arminians.

Like with Tyrannosaurus, the maxillary ( cheek ) teeth of Albertosaurus were adapted in general form to resist lateral forces exerted by a struggling prey.

They were overtaken by Alfred's oldest son, Edward, and were defeated in a general engagement at Farnham in Surrey.

Their houses, scattered throughout Lombardy and Venetia, were united into a congregation by St Pius V, under the Rule of St Augustine with a mother-house, residence of the prioress general, at Pavia.

One reason that financial officials were elected was that any money embezzled could be recovered from their estates ; election in general strongly favoured the rich, but in this case wealth was virtually a prerequisite.

Irregular past tense forms, such as " broke " or " was / were ", can be seen as still more specific cases ( since they are confined to certain lexical items, like the verb " break "), which therefore take priority over the general cases listed above.

After World War II, especially in North America, there was a boom in general aviation, both private and commercial, as thousands of pilots were released from military service and many inexpensive war-surplus transport and training aircraft became available.

Conversely, Howard Marshall writes that the speeches were not entirely the inventions of the author and, while they may not be verbatim, nevertheless records the general idea.

The COX2 inhibitors were thus developed to inhibit only the COX2 enzyme ( traditional NSAIDs block both versions in general ).

In general, the larger the ensemble, the greater the need for a formal arrangement, although the early Count Basie big band was famous for its head arrangements, so called because they were worked out by the players themselves, memorized immediately and never written down.

In an interview with Metro in September 2006 she stated that if Parliament were of a normal length, it was likely she would retire at the next general election .< ref >

The Bonapartes were back in Ajaccio in 1797 under the protection of general Napoleon.

While the greatest players of the time, among them Alekhine, Emanuel Lasker and Capablanca, clearly did not allow their play to be hobbled by blind adherence to general concepts that the center had to be controlled by pawns, that development had to happen in support of this control, that rooks always belong on open files, that wing openings were unsound — core ideas of Tarrasch's chess philosophy as popularly understood — beginners were taught to think of these generalizations as unalterable principles.