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Arabic is a Semitic language that first emerged in the 1st to 4th centuries CE. It is now the lingua franca of the Arab world. It is named after the Arabs, a term initially used to describe peoples living in the Arabian Peninsula bounded by eastern Egypt in the west, Mesopotamia in the east, and the Anti-Lebanon mountains and Northern Syria in the north, as perceived by ancient Greek geographers The ISO assigns language codes to thirty varieties of Arabic, including its standard form, Modern Standard Arabic, also referred to as Literary Arabic, which is modernized Classical Arabic. This distinction exists primarily among Western linguists; Arabic speakers themselves generally do not distinguish between Modern Standard Arabic and Classical Arabic, but rather refer to both as al-ʿarabiyyatu l-fuṣḥā or simply al-fuṣḥā (اَلْفُصْحَىٰ). Modern Standard Arabic is an official language of 26 states and 1 disputed territory, the third most after English and French.
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 reversed and shifted. The integral is evaluated for all values of shift, producing the convolution function.
The International Phonetic Alphabet (IPA) is an alphabetic system of phonetic notation based primarily on the Latin script. It was devised by the International Phonetic Association in the late 19th century as a standardized representation of speech sounds in written form. The IPA is used by lexicographers, foreign language students and teachers, linguists, speech–language pathologists, singers, actors, constructed language creators and translators.
The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. The structure of the table shows periodic trends. The seven rows of the table, called periods, generally have metals on the left and nonmetals on the right. The columns, called groups, contain elements with similar chemical behaviours. Six groups have accepted names as well as assigned numbers: for example, group 17 elements are the halogens; and group 18 are the noble gases. Also displayed are four simple rectangular areas or blocks associated with the filling of different atomic orbitals.
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The orbital period is the time a given astronomical object takes to complete one orbit around another object, and applies in astronomy usually to planets or asteroids orbiting the Sun, moons orbiting planets, exoplanets orbiting other stars, or binary stars.
In thermodynamics, the Gibbs free energy is a thermodynamic potential that can be used to calculate the maximum reversible work that may be performed by a thermodynamic system at a constant temperature and pressure. The Gibbs free energy (, measured in joules in SI) is the maximum amount of non-expansion work that can be extracted from a thermodynamically closed system. This maximum can be attained only in a completely reversible process. When a system transforms reversibly from an initial state to a final state, the decrease in Gibbs free energy equals the work done by the system to its surroundings, minus the work of the pressure forces.
This gallery of sovereign state flags shows the national or state flags of sovereign states that appear on the list of sovereign states. For other flags, please see flags of active autonomist and secessionist movements, flags of extinct states and gallery of flags of dependent territories. Each flag is depicted as if the flagpole is positioned on the left of the flag, except for those of Iran, Iraq and Saudi Arabia which are depicted with the hoist to the right.
Storm Shadow is a fictional character from the G.I. Joe: A Real American Hero toyline, comic books and animated series. He is best known as the Cobra Commander's ninja bodyguard, and for his history with fellow ninja Snake Eyes. Throughout their history, he has changed sides several times; conflicted in loyalties between Cobra, G.I. Joe, and his blood brother, Snake Eyes. Storm Shadow is one of the most prominent characters in the G.I. Joe: A Real American Hero franchise, and has appeared in every series since its inception. He is portrayed by Lee Byung-hun in the 2009 live-action film G.I. Joe: The Rise of Cobra, and the 2013 sequel G.I. Joe: Retaliation. Andrew Koji will portray Storm Shadow in the upcoming 2021 film, Snake Eyes.
The Google logo appears in numerous settings to identify the search engine company. Google has relied on several logos over its history, with the first logo created by Sergey Brin using GIMP. A revised logo debuted on September 1, 2015. The previous logo, with slight modifications between 1999 and 2013, was designed by Ruth Kedar, with a wordmark based on the Catull, an old style serif typeface designed by Gustav Jaeger for the Berthold Type Foundry in 1982.
Nyctosia is a genus of moths in the subfamily Arctiinae. The genus was described by Schaus in 1899.
Coeriana is a genus of moths of the family Erebidae. The genus was erected by Francis Walker in 1858.
In telecommunications, 5G is the fifth generation technology standard for broadband cellular networks, which cellular phone companies began deploying worldwide in 2019, and is the planned successor to the 4G networks which provide connectivity to most current cellphones. 5G networks are predicted to have more than 1.7 billion subscribers worldwide by 2025, according to the GSM Association. Like its predecessors, 5G networks are cellular networks, in which the service area is divided into small geographical areas called cells. All 5G wireless devices in a cell are connected to the Internet and telephone network by radio waves through a local antenna in the cell. The main advantage of the new networks is that they will have greater bandwidth, giving higher download speeds, eventually up to 10 gigabits per second (Gbit/s). Due to the increased bandwidth, it is expected the networks will increasingly be used as general internet service providers for laptops and desktop computers, competing with existing ISPs such as cable internet, and also will make possible new applications in internet of things (IoT) and machine to machine areas. 4G cellphones are not able to use the new networks, which require 5G enabled wireless devices.
Orthonama is a genus of the geometer moth family (Geometridae). It belongs to the tribe Xanthorhoini of the "carpet" subfamily (Larentiinae). Nycterosea is usually included here by modern authors, but may in fact be distinct enough to warrant recognition as an independent genus. The genus was erected by Jacob Hübner in 1825.
Eurhodope is a genus of snout moths. It was described by Jacob Hübner in 1825.
Nyctosia coccinea is a moth of the subfamily Arctiinae. It was described by Schaus in 1899. It is found in Mexico.
Nyctosia tenebrosa is a moth of the subfamily Arctiinae. It was described by Francis Walker in 1866. It is found in Mexico and Guatemala.
Several genera of the Lithosiini tribe of lichen moths are placed as incertae sedis due to the uncertainty of their phylogenetic relationships within the tribe.
References
- ↑ Beccaloni, G.; Scoble, M.; Kitching, I.; Simonsen, T.; Robinson, G.; Pitkin, B.; Hine, A.; Lyal, C., eds. (2003). "Nyctosia poicilonotus". The Global Lepidoptera Names Index . Natural History Museum . Retrieved May 11, 2018.
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