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Morse code is a method used in telecommunication to encode text characters as standardized sequences of two different signal durations, called dots and dashes or dits and dahs. Morse code is named after Samuel Morse, an inventor of the telegraph.
The Q-code is a standardized collection of three-letter codes that each start with the letter "Q". It is an operating signal initially developed for commercial radiotelegraph communication and later adopted by other radio services, especially amateur radio. To distinguish the use of a Q-code transmitted as a question from the same Q-code transmitted as a statement, operators either prefixed it with the military network question marker "INT" or suffixed it with the standard Morse question mark UD.
In mathematics, specifically in differential topology, Morse theory enables one to analyze the topology of a manifold by studying differentiable functions on that manifold. According to the basic insights of Marston Morse, a typical differentiable function on a manifold will reflect the topology quite directly. Morse theory allows one to find CW structures and handle decompositions on manifolds and to obtain substantial information about their homology.
Edward Sylvester Morse was an American zoologist, archaeologist, and orientalist. He is considered the "Father of Japanese archaeology."
Harold Calvin Marston Morse was an American mathematician best known for his work on the calculus of variations in the large, a subject where he introduced the technique of differential topology now known as Morse theory. The Morse–Palais lemma, one of the key results in Morse theory, is named after him, as is the Thue–Morse sequence, an infinite binary sequence with many applications. In 1933 he was awarded the Bôcher Memorial Prize for his work in mathematical analysis.
Asteriscus may refer to:
A resurrection plant is any poikilohydric plant that can survive extreme dehydration, even over months or years.
California's 4th congressional district is a U.S. congressional district in California.
Procedure signs or prosigns are shorthand signals used in Morse code radio telegraphy procedures, for the purpose of simplifying and standardizing communications related to radio operating issues among two or more radio operators. They are distinct from general Morse code abbreviations, which consist mainly of brevity codes that convey messages to other parties with greater speed and accuracy.
Asteriscus is a genus of flowering plants in the family Asteraceae.
Valloniidae is a taxonomic family of small and minute, air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Pupilloidea.
Silphium asteriscus, commonly called starry rosinweed, is an herbaceous plant in the aster family. It is native to the eastern United States, from Oklahoma and Texas east to Florida and Pennsylvania. It is a widespread species found in a variety of open habitats, such as prairies and woodlands.
Planogyra astericus, common name the eastern flat-whorl, is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Valloniidae.
Marisa is a genus of freshwater snails in the family Ampullariidae, the apple snails.
Hemigrapha is a genus of fungi in the family Parmulariaceae. According to the 2007 Outline of Ascomycota, the placement of this genus within the family is uncertain.
Liotia is a genus of very small sea snails, marine gastropod mollusks in the family Liotiidae.
Macrocheilus asteriscus is a species of ground beetle in the subfamily Anthiinae. It was described by White in 1844.
Asteriscus smithii is a species of flowering plants of the family Asteraceae. The species is endemic to the island of São Nicolau, Cape Verde. It is listed as critically endangered due to its very restricted area of occupancy and its low population size. Its local name is macela-de-gordo.
Asteriscus daltonii is a species of flowering plants of the family Asteraceae. The species is endemic to Cape Verde. Its local name is macela. It is listed as near threatened by the IUCN.
Asteriscus aquaticus is a species of flowering plant. The flower is part of the so-called "Asteriscus alliance".
References
- ↑ Morse E. S. (1864). J. Portland Soc. nat. Hist. 1: 24.