Haemangela | |
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Genus: | Haemangela Meyrick, 1936 |
Species: | H. vindicatrix |
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Haemangela vindicatrix Meyrick, 1936 | |
Haemangela is a genus of moths of the family Heliodinidae. It contains only one species, Haemangela vindicatrix, which is found on the Solomon Islands. [1]
The Apiales are an order of flowering plants. The families are those recognized in the APG III system. This is typical of the newer classifications, though there is some slight variation and in particular, the Torriceliaceae may also be divided.
In mathematics, convolution is a mathematical operation on two functions that produces a third function that expresses how the shape of one is modified by the other. The term convolution refers to both the result function and to the process of computing it. It is defined as the integral of the product of the two functions after one is reflected about the y-axis and shifted. The choice of which function is reflected and shifted before the integral does not change the integral result. The integral is evaluated for all values of shift, producing the convolution function.
G, or g, is the seventh letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is gee, plural gees.
In mathematics, especially order theory, a partial order on a set is an arrangement such that, for certain pairs of elements, one precedes the other. The word partial is used to indicate that not every pair of elements needs to be comparable; that is, there may be pairs for which neither element precedes the other. Partial orders thus generalize total orders, in which every pair is comparable.
In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors. The term potential energy was introduced by the 19th-century Scottish engineer and physicist William Rankine, although it has links to the ancient Greek philosopher Aristotle's concept of potentiality.
The electrical resistance of an object is a measure of its opposition to the flow of electric current. Its reciprocal quantity is electrical conductance, measuring the ease with which an electric current passes. Electrical resistance shares some conceptual parallels with mechanical friction. The SI unit of electrical resistance is the ohm, while electrical conductance is measured in siemens (S).
In mathematics, a presentation is one method of specifying a group. A presentation of a group G comprises a set S of generators—so that every element of the group can be written as a product of powers of some of these generators—and a set R of relations among those generators. We then say G has presentation
The orbital period is the amount of time a given astronomical object takes to complete one orbit around another object. In astronomy, it usually applies to planets or asteroids orbiting the Sun, moons orbiting planets, exoplanets orbiting other stars, or binary stars. It may also refer to the time it takes a satellite orbiting a planet or moon to complete one orbit.
In chemistry, the molar mass of a chemical compound is defined as the ratio between the mass and the amount of substance of any sample of said compound. The molar mass is a bulk, not molecular, property of a substance. The molar mass is an average of many instances of the compound, which often vary in mass due to the presence of isotopes. Most commonly, the molar mass is computed from the standard atomic weights and is thus a terrestrial average and a function of the relative abundance of the isotopes of the constituent atoms on Earth. The molar mass is appropriate for converting between the mass of a substance and the amount of a substance for bulk quantities.
Plovers are a widely distributed group of wading birds belonging to the subfamily Charadriinae.
In mathematics, a function from a set X to a set Y assigns to each element of X exactly one element of Y. The set X is called the domain of the function and the set Y is called the codomain of the function.
In mathematics, an incidence matrix is a logical matrix that shows the relationship between two classes of objects, usually called an incidence relation. If the first class is X and the second is Y, the matrix has one row for each element of X and one column for each element of Y. The entry in row x and column y is 1 if x and y are related and 0 if they are not. There are variations; see below.
Sharpness is an English port in Gloucestershire, one of the most inland in Britain, and eighth largest in the South West England region. It is on the River Severn at grid reference SO669027, at a point where the tidal range, though less than at Avonmouth downstream, is still large.
SS Patrick Henry was the first Liberty ship launched. It was built by the Bethlehem Shipbuilding Corporation at their Bethlehem-Fairfield Shipyard in Baltimore, Maryland. She was named after Patrick Henry, an American attorney, planter, and Founding Father as well as the first and sixth post-colonial Governor of Virginia, from 1776 to 1779 and 1784 to 1786.
In physics, tension is described as the pulling force transmitted axially by the means of a string, a rope, chain, or similar object, or by each end of a rod, truss member, or similar three-dimensional object; tension might also be described as the action-reaction pair of forces acting at each end of said elements. Tension could be the opposite of compression.
Kemak is a language spoken in East Timor and in the border region of Indonesian West Timor. An alternate name is Ema. It is most closely related to Tocodede and Mambai. It has the status of one of the national languages in the East Timor constitution, besides the official languages of Portuguese and Tetum. The number of speakers has fallen in recent years.
J, or j, is the tenth letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its usual name in English is jay, with a now-uncommon variant jy. When used in the International Phonetic Alphabet for the voiced palatal approximant it may be called yod or jod.
Cryptophagidae is a family of beetles with representatives found in all biogeographic realms. Members of this family are commonly called silken fungus beetles and both adults and larvae appear to feed exclusively on fungi although in a wide variety of habitats and situations, such as rotting wood and shed animal fur and feathers. These beetles vary from about 1 to 11 millimeters long, and usually have an oval body shape with a slight "waist".
Ngaju is an Austronesian language spoken along the Kapuas, Kahayan, Katingan, and Mentaya Rivers in Central Kalimantan, Indonesia. It is closely related to the Bakumpai language. There are three dialects—Pulopetak, Ba'amang, and Mantangai.
Sula is a Malayo-Polynesian language of the Central Maluku branch. It is related to the Buru language.