In mathematics, an interval is a group of numbers that includes all numbers between the beginning and the end. Numbers that are larger than the beginning number and smaller than the end number are inside the interval, and numbers that are smaller than the beginning number or larger than the end number are not in the interval. The beginning number and end number may or may not be inside the interval. An example of an interval might be from 3.3 to 15. Here, numbers such as 4, 8, 9.5, 14, and even 14.999 are inside this interval. Numbers such as -4, 2, 3.2, 20, and 15.000001 are not inside this interval.
To write an interval, write either a square bracket ( [ ) or a parenthesis ( ( ), the beginning number, a comma ( , ), the end number, and either a closing square bracket ( ] ) or a closing parenthesis ( ) ). Examples of intervals are (4, 9.6), [-100, 100], [-30, -4).
Intervals can be separated by how they act at their ends. Intervals can be closed, open, or mixed.
An interval that is closed also includes the beginning and the end, and generally takes the form of formula_1. A closed interval that has 3 as the beginning and 5.4 as the end would include 3, 5.4, and every number between 3 and 5.4. To write a closed interval, use square brackets ( [ and ] ). An example of an closed interval is [136, 450].
An interval that is open does not include the beginning or the end, and generally takes the form of formula_2. An open interval that has 3 as the beginning and 5 as the end would include every number between 3 and 5, but it would not include 3 or 5. To write an open interval, use parentheses ( ( and ) ). An example of an open interval is (2, 5).
A mixed interval is open at one end and closed at the other end, and generally takes the form of formula_3 (right-open interval) or formula_4 (left-open interval). This means that the interval may include the beginning but not the end, or it may include the end but not the beginning. For example, the interval [9, 23) would include 9, but it would not include 23.
Actinobacteria
The Actinobacteria are a group of gram-positive bacteria. Most are found in the soil. They include some of the most common soil life, playing important roles in decomposition and humus formation.
Some, like "Streptomyces", were originally classified as fungi, because they form branching filaments like hyphae. All Actinobacteria are aerobic. A few forms are pathogens, such as "Mycobacterium". Some are thermophilic.
Oracle Database
Oracle database is a relational database management system that is made by the Oracle Corporation.
Golgi
Golgi may mean:
Graphiurus
The African dormouse, Graphiurus, is a genus of dormouse that lives throughout sub-Saharan Africa in different habitats. They are good at climbing. They have bushy tails. They eat invertebrates and small vertebrates.
Angolan African dormouse
The Angolan African dormouse ("Graphiurus angolensis") is a species of rodent in the Gliridae family. It is endemic to (lives only in) Angola. Its natural habitat is subtropical or tropical dry forests.
Christy's dormouse
Christy's dormouse ("Graphiurus christyi") is a species of rodent in the Gliridae family. It is found in Cameroon and Democratic Republic of the Congo. Its natural habitat is subtropical or tropical moist lowland forests.
Linnean Society of London
The Linnean Society of London is the world's biggest society for the study and discussion of taxonomy and natural history. It publishes a Zoological Journal, as well as Botanical and Biological Journals. It also prints "The Linnean", a review of the history of the society and of taxonomy.
The Linnean Society was started in 1788. It was named after the Swedish naturalist Carolus Linnaeus. The Society is based at Burlington House in Piccadilly, London. Members can be a "Student member", an "Associate member" or a "full Fellow". To become a member, a person needs to be nominated by two or more Fellows, and succeed in an election. Fellows of the society can use the letters "FLS" after their names to show their membership of the Society (for example, "John Smith FLS").
The Linnean Society of London wants to promote the study of all areas of the biological sciences. They especially want to promote the study of evolution, taxonomy, biodiversity and sustainability. The Society awards medals and grants to help with this.
The following medals and prizes are awarded by the Linnean Society:
Linnaeus' botanical and zoological collections were bought in 1783 by Sir James Edward Smith, the first President of the society. They are held in London by the Society. The collections include 14,000 plants, 158 fish, 1,564 shells, 3,198 insects, 1,600 books and 3,000 letters and documents. If you want to see them, you need to make an appointment.
James Smith's own plant collection is also kept by the Society. It has been put into a database by the Smith Herbarium Project at the National Museums Liverpool. 6,000 plants have been cleaned and repaired.
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Guy Dollman
Captain John Guy Dollman BA, FLS (1886-1942) (who was known as Guy Dollman) was a British zoologist and taxonomist. Dollman's Tree Mouse and Dollman's Vlei Rat are named after him.
Guy Dollman was the eldest son of the artist John Charles Dollman. He was born on 4 September 1886 and went to St Paul's School. He later went to St John's College Cambridge. In February 1907, when he was still a student, he was employed by the Department of Zoology at the British Museum (Natural History). He spent most of his working life there as Assistant Keeper of Mammals.
In 1912, on an expedition to Vietnam, he discovered and named the Tonkin Snub-nosed Langur. He joined the British Army in 1915, and obtained a commission in the 19th London Regiment. He was injured in a bomb accident so he did not fight in the First World War.
In 1919, he returned to the museum. He was an adviser to the British group at the 1933 International Conference for the Preservation of the Flora and Fauna of Africa. This was the most important meeting about protecting nature before the Second World War. Dollman helped to decide which animal species needed protecting.
He travelled and wrote a lot with Walter Rothschild. Some of their writing included "New mammals from Dutch New Guinea" (which was published in 1932) and a book about tree kangaroos which was called "The Genus Dendrolagus" (which was published in 1936). He was also a very good artist, showing pictures at the Royal Academy. He also drew pictures for his own scientific writings.
Dollman died on 21 March 1942 when he was 65 years old.
Dollman is the binomial authority (the first person to name a species) for the following animals:
Jentink's dormouse
Jentink's dormouse ("Graphiurus crassicaudatus") is a species of rodent in the Gliridae family. It is found in Cameroon, Ivory Coast, Ghana, Liberia, Nigeria, Togo. It is also sometimes found in Benin, Equatorial Guinea and Sierra Leone. Its natural habitat is subtropical or tropical moist lowland forests.
Johnston's African dormouse
The Johnston's African dormouse ("Graphiurus johnstoni") is a species of rodent in the Gliridae family. It is found in Malawi, Zambia, and Zimbabwe. Its natural habitat is moist savanna.
Kellen's dormouse
Kellen's dormouse ("Graphiurus kelleni") is a species of rodent in the Gliridae family. It is found in Angola, Burkina Faso, Cameroon, Central African Republic, Democratic Republic of the Congo, Gambia, Kenya, Mali, Nigeria, Niger, Senegal, Tanzania, and Uganda.
Its natural habitats are subtropical or tropical dry forests and moist and dry savanna.
Lorrain dormouse
The Lorrain Dormouse ("Graphiurus lorraineus") is a species of rodent in the Gliridae family. It is found in Cameroon, Democratic Republic of the Congo, Ghana, Guinea-Bissau, Liberia, Nigeria, Sierra Leone, Tanzania, and Uganda. Its natural habitats are subtropical or tropical moist lowland forests, moist savanna, and plantations .