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X 0
X0 may refer to: Grammar * X0, denoting a sentence component ** Zero-level projection, in X-bar theory ** Head (linguistics), or nucleus Science, technology and mathematics * SpaceShipOne flight 15P, a 2004 private spaceflight * X/0, division by zero * Turner syndrome, a disorder in which all or part of an X chromosome is absent * X0 sex-determination system The XO sex-determination system (sometimes referred to as X0 sex-determination system) is a system that some species of insects, arachnids, and mammals (not including humans) use to determine the sex of offspring. In this system, there is only o ..., as found in some insects Vehicles * X0, a smaller rigged version of an X1 (dinghy) * X0, running number for N700 Series Shinkansen prototype from 2014 to 2021 See also * XO (other) * X00, a popular DOS-based FOSSIL driver which was commonly used in the mid 1980s to the late 1990s * 0X (other) {{Letter-Number Combination Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zero-level Projection
In linguistics, X-bar theory is a model of phrase structure and a theory of syntactic category formation that proposes a universal schema for how phrases are organized. It suggests that all phrases share a common underlying structure, regardless of their specific category (noun phrase, verb phrase, etc.). This structure, known as the X-bar schema, is based on the idea that every phrase (XP, X phrase) has a Head (linguistics), head, which determines the type (syntactic category) of the phrase (X). The theory was first proposed by Noam Chomsky in 1970Chomsky, Noam (1970). Remarks on Nominalization. In: R. Jacobs and P. Rosenbaum (eds.) ''Reading in English Transformational Grammar'', 184–221. Waltham: Ginn. reformulating the ideas of Zellig Harris (1951), and further developed by Ray Jackendoff (1974, 1977a, 1977bJackendoff, Ray (1977b) Constraints on Phrase Structure Rules, in P. W. Culicover, T. Wasow & A. Akmajian (eds.), ''Formal Syntax'', Academic Press, New York, pp. 249– ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Head (linguistics)
In linguistics, the head or nucleus of a phrase is the word that determines the syntax, syntactic category of that phrase. For example, the head of the noun phrase "boiling hot water" is the noun (head noun) "water". Analogously, the head of a compound (linguistics), compound is the word stem, stem that determines the semantic category of that compound. For example, the head of the compound noun "handbag" is "bag", since a handbag is a bag, not a hand. The other elements of the phrase or compound Grammatical modifier, modify the head, and are therefore the head's ''dependent (grammar), dependents''. Headed phrases and compounds are called ''endocentric'', whereas ''exocentric'' ("headless") phrases and compounds (if they exist) lack a clear head. Heads are crucial to establishing the direction of branching (linguistics), branching. Head-initial phrases are right-branching, head-final phrases are left-branching, and head-medial phrases combine left- and right-branching. Basic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SpaceShipOne Flight 15P
Flight 15P of SpaceShipOne (X0) was the first privately funded human spaceflight. It took place on June 21, 2004. It was the fourth powered test flight of the Tier One program, with the previous three test flights reaching much lower altitudes. The flight carried only its pilot, Mike Melvill, who thus became the first non-governmental astronaut. This flight was a full-altitude test, but not itself a competitive flight for the Ansari X Prize, the prize for the first non-governmental reusable crewed spacecraft. Problems were encountered during the flight but later corrected, paving the way for SpaceShipOne to make competitive flights later in 2004. Crew Flight profile All times are in PDT, which is seven hours behind UTC. This was the local civil time at the spaceport on the day of the flight. All measurements are first stated in the U.S. customary units in which they were originally reported, with conversions to SI units also given. Taxiing for takeoff from Mojave Spac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turner Syndrome
Turner syndrome (TS), commonly known as 45,X, or 45,X0,Also written as 45,XO. is a chromosomal disorder in which cells of females have only one X chromosome instead of two, or are partially missing an X chromosome (sex chromosome monosomy) leading to the complete or partial deletion of the pseudoautosomal regions (PAR1, PAR2) in the affected X chromosome. Typically, people have two sex chromosomes (XX for females or XY for males). The chromosomal abnormality is often present in just some cells, in which case it is known as Turner syndrome with mosaicism. 45,X0 with mosaicism can occur in males or females, but Turner syndrome without mosaicism only occurs in females. Signs and symptoms vary among those affected but often include additional skin folds on the neck, arched palate, low-set ears, low hairline at the nape of the neck, short stature, and lymphedema of the hands and feet. Those affected do not normally develop menstrual periods or mammary glands without hormone trea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
X0 Sex-determination System
The XO sex-determination system (sometimes referred to as X0 sex-determination system) is a system that some species of insects, arachnids, and mammals (not including humans) use to determine the sex of offspring. In this system, there is only one sex chromosome, referred to as X. Males only have one X chromosome (XO), while females have two (XX). The letter O (sometimes a zero) signifies the lack of a Y chromosome. Maternal gametes always contain an X chromosome, so the sex of the animals' offspring depends on whether a sex chromosome is present in the male gamete. Its sperm normally contains either one X chromosome or no sex chromosomes at all. This system determines the sex of offspring among: * Most arachnidsBull, James J.; ''Evolution of sex determining mechanisms''; p. 17 with the exception of mites where a small majority are haplodiploid * Almost all apterygote and Paleopteran insects (e.g., dragonflies, silverfish) * Most exopterygote insects (e.g., grasshoppers, cric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
X1 (dinghy)
The X1 is a fast, light-weight sailing dinghy designed for sailing on rivers, estuaries and inland waters by Phil Morrison. The dinghy is sailed by 2 or 3 people and has a main, a jib and a symmetric spinnaker. The boat is designed to be easily driven in very light wind, easy to sail and rig and quick to tack. It has a PY of 949. Currently the PY is the same as an RS400 The RS400 is a light-weight sailing dinghy designed by Phil Morrison and manufactured by RS Sailing. The dinghy is sailed by two people and has a main, a jib and an asymmetric spinnaker A spinnaker is a sail designed specifically for sailin ... but can perform better in light wind and slower in heavier winds. The X1 was boat tested by Yachts & Yachting and Yachting Life. Variant The X0 is a variant of the original X1 with the same hull etc. but a smaller rig. The mast and three sails are different and can easily be substituted. This version is intended for beginners or lighter weight crew. Difference ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
N700 Series Shinkansen
The is a Japanese Shinkansen high-speed train with tilting capability developed jointly by JR Central and JR West for use on the Tōkaidō and San'yō Shinkansen lines since 2007, and is operated by JR Kyushu on the Kyushu Shinkansen line. N700 series trains have a maximum speed of , and tilting of up to one degree allows the trains to maintain , even on radius curves that previously had a maximum speed of . Another feature of the N700 is that it accelerates more quickly than the older 700 series Shinkansen trains, with a maximum acceleration rate of 2.6 km/h/s (0.72 m/s2). This enables it to reach in only three minutes. Further advancements led to the development of the N700A, an incremental evolution of the N700. N700A trains can reach on curves, allowing the maximum operating speed on the Tōkaidō Shinkansen to be raised to . All N700 series sets have been retrofitted with most of the improvements added to the N700A series, and are now classified as "N700A" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
