Parts of Cavan were under Norman influence from the twelfth century. The remains of several buildings from the time can still be seen at Castlerahan and Clogh Oughter castle. There are also some remains of early abbeys in the county, like at Drumlane and Trinity Island.
The Plantation of Ulster from 1610 saw the settlement and origins of several new towns within the county like Bailieborough, Cootehill, Killeshandra and Virginia. Existing towns such as Cavan and Belturbet became over time more important as trading centres. Wars aimed at trying to unsettle the Plantation only led to further plantations of English and Scottish settlers into the county and the beginnings of a thriving flax and linen industry.
Agriculture is the largest industry in the county, especially dairy milk processing as well as pig and beef farming. Much of Cavan's land is clay soils, which are rich in minerals, but heavy and poorly drained, making pasture farming the dominant farming system in the county. There is a total farmed area of in the county, and there are approximately 219,568 cattle in Cavan.
Peat cutting exists in the northwest of the county, in the Cuilcagh range.
Cavan has expanded in other industries, mainly quarrying, energy production and manufacturing facilities.
Elitserien
Elitserien (literally, the "Elite League") is the name of several Swedish sport leagues that cover the whole of Sweden. In most sports, Elitserien is the highest league, with the second highest usually named Allsvenskan.
Elitserien leagues:
Leagues formerly named Elitserien:
Gyllene Tider
Gyllene Tider is a pop band from the town of Halmstad in Sweden.
The Genetical Theory of Natural Selection
The Genetical Theory of Natural Selection is a book by R.A. Fisher first published in 1930 by Oxford University Press which combines Mendelian genetics with Charles Darwin's theory of natural selection. It is one of the most important books of the modern evolutionary synthesis.
A second, slightly revised edition was published in 1958. In 1999, a third variorum edition, with the original 1930 text, annotated with the 1958 alterations, notes and alterations accidentally omitted from the second edition was published.
When Fisher started his career, genetics was not a well-understood science. There were biologists who did not see how evolution by natural selection could happen with heredity as they understood it. The main effect of the book was to to show the small changes in genes could indeed lead to the large changes seen in the fossil record. Fisher's second chapter, the "Fundamental theory of natural selection", convinced most biologists that Darwin's idea and modern genetics were compatible (could work together). Fisher's view was reinforced by Julian Huxley, J.B.S. Haldane, Sewell Wright, Theodosius Dobzhansky, and G. Ledyard Stebbins. All of these men were in touch with genetics. With the addition of two field biologists, Ernst Mayr and Bernhard Rensch and a palaeontologist, George Simpson, the group put together the modern synthesis.
Fisher also developed ideas on sexual selection, mimicry and the evolution of dominance. He showed that mutations with big effects usually reduce the fitness of the individual. He also proved that larger populations carry more variation and have a greater chance of survival. He set the foundations for population genetics.
About a third of the book concerned the applications of genetics to humans. Using the British census data of 1911, he showed there was an inverse relationship between fertility and social class. This was partly due, he believed, to the rise in social status of families who were not capable of producing many children but who rose because of the financial advantage of having a small number of children. Therefore he suggested subsidies (he called them allowances) to families with larger numbers of children, with the allowances proportional to the earnings of the father. He himself had two sons and six daughters.
The book was reviewed, among others, by physicist Charles Galton Darwin, a grandson of Charles Darwin's. After his review, C.G. Darwin sent Fisher his copy of the book, with notes in the margin. The marginal notes became the food for a correspondence running at least three years.
Although Fisher's book was immediately understood by the few who understood genetics, it was a long time before the general biologist appreciated it. It is now agreed to be one of the foundations of modern population genetics and evolution.
Fisher's book also had a major influence on W.D. Hamilton and the development of his theories on the genetic basis for kin selection. Hamilton, a leading theoretician of the later 20th century, said:
Aseptic meningitis
Meningitis happens when the brain's lining becomes inflamed. This lining is called the meninges. Aseptic meningitis occurs when there are signs of meningitis. However, when a sample of brain fluid is taken, bacteria do not grow. This condition is often treatable. In many cases, recovery takes 7–10 days.
These factors increase the chance of developing aseptic meningitis:
County Meath
County Meath () is a county in Ireland. It is part of the province of Leinster. It is named after the ancient "Kingdom of Mide" (in Gaelic "Mide" means "middle"). 184,135 people lived in the county according to the 2011 census. The county town is Navan, this is where the county hall and government are located. Trim used to be the county town.
The River Boyne flows through the county.
The county is sometimes known by the nickname "The Royal County" because of its history as the seat of the High King of Ireland.
County Meath formed the eastern part of the former Kingdom of Mide. The seat of the High King of Ireland was at Tara which is not far from Navan.
The archaeological complex of "Brú na Bóinne" is 5,000 years old. It includes the burial sites of Newgrange, Knowth and Dowth, in the north-east of the county. It is a UNESCO designated World Heritage Site.
The county has a lot of farms, mainly cattle, dairying, potatoes and grain. Meath is Ireland's leading county producer of potatoes, and a significant producer of beef, barley, milk, wheat, and root vegetables. Europe's largest underground lead-zinc mine, Tara Mines, has operated since 1977, at a location to the west of Navan.
Eddington limit
The Eddington limit, or Eddington luminosity was first worked out by Arthur Eddington. It is a natural limit to the normal luminosity of stars. The state of balance is a hydrostatic equilibrium. When a star exceeds the Eddington limit, it loses mass with a very intense radiation-driven stellar wind from its outer layers.
Eddington's models treated a star as a sphere of gas held up against gravity by internal thermal pressure. Eddington showed that radiation pressure was necessary to prevent collapse of the sphere.
Most massive stars have luminosities far below the Eddington luminosity, so their winds are mostly driven by the less intense line absorption. The Eddington limit explains the observed luminosity of accreting black holes such as quasars.
Eddington limit explains the very high mass loss rates seen in the outbursts of η Carinae in 1840–1860. The regular stellar winds can only stand for a mass loss rate of about 10–10 solar masses per year. Mass loss rates of up to 0.5 solar masses per year are needed to understand the η Carinae outbursts. This can be done with the help of the super-Eddington broad spectrum radiation driven winds.