H2 (A

	H2 (A H2, H02, or H-2 may refer to: Arts and media * Armenia 2 (H2), a private television company broadcasting in Armenia and Nagorno-Karabakh * H2 (A&E Networks), the rebranded name of the former channel ''History International'' *H2 (American TV channel), the American version of the channel ''H2'' (manga), a baseball manga by Mitsuru Adachi * ''Halo 2'', a video game for the Xbox, created and developed by Bungie * ''Halloween II'' (2009 film), initially abbreviated to ''H2'' * ''Hollywood Squares'', referred to as ''H2'' informally during the 2002–2004 seasons Computing * , level 2 heading markup for HTML Web pages, see HTML element#heading * H2 (DBMS), an open-source Java SQL database-management system * DSC-H2, a 2006 Sony Cyber-shot H series camera * HTTP/2, major revision of HTTP, often abbreviated in discussions as h2, and identifying itself to other servers as h2 in TLS negotiation or h2c in the HTTP Upgrade header * LGA 1155 CPU socket, also known as Socket H2 Roads and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Armenia 2 Second Armenian TV Channel Company ( hy, Հայկական երկրորդ հեռուստաալիք), also known as H2 ( hy, Հ2) or Armenia 2, is a private television company broadcasting in Armenia and Artsakh. Approximately 95% of the TV viewers of Armenia and Artsakh are able to watch the channel, which broadcasts 18 hours daily. The company employs 250 people. The news block of the TV channel is called ''Lraber'' ( hy, Լրաբեր, meaning "Herald") which has its own reporters throughout Armenia and Artsakh. The international overview is carried out based on the German Deutsche Welle TV channel. H2 TV also cooperates with the Russian channels ''Russia-1'' and ''NTV'' and other foreign channels. The president and the director of the TV channel is Samvel Mayrapetyan. The offices and the studios of the TV are located in the Ajapnyak district of Yerevan Yerevan ( , , hy, Երևան , sometimes spelled Erevan) is the capital and largest city of Armenia and one of the wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Prostaglandin H2 Prostaglandin H2 is a type of prostaglandin and a precursor for many other biologically significant molecules. It is synthesized from arachidonic acid in a reaction catalyzed by a cyclooxygenase enzyme. The conversion from Arachidonic acid to Prostaglandin H2 is a two step process. First, COX-1 catalyzes the addition of two free oxygens to form the 1,2-Dioxane bridge and a peroxide functional group to form Prostaglandin G2. Second, COX-2 reduces the peroxide functional group to a Secondary alcohol, forming Prostaglandin H2. Other peroxidases like Hydroquinone have been observed to reduce PGG2 to PGH2. PGH2 is unstable at room temperature, with a half life of 90-100 seconds, so it is often converted into a different prostaglandin. It is acted upon by: * Prostacyclin synthase to create prostacyclin * Thromboxane-A synthase to create thromboxane A2 and 12-(S)-hydroxy-5Z,8E,10E-heptadecatrienoic acid (HHT) (see 12-Hydroxyheptadecatrienoic acid) * Prostaglandin D2 synthase to cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Landgraf H-2 The Landgraf H-2 was an American single-seat twin-rotor helicopter designed by Fred Landgraf and built by the Landgraf Helicopter Company of Los Angeles, California. Although awarded a development contract by the United States Army, it was not developed and was overtaken by more advanced designs. Design and development Fred Landgraf formed the Landgraf Helicopter Company in September 1943 to develop and manufacture the H-2. It had an enclosed structure for one pilot and an 85 hp (63 kW) radial engine driving two rotors, each rotor fitted to a short boom on each side of the fuselage. It had a fixed tricycle landing gear. The H-2 first flew on 2 November 1944 and the company was awarded a development contract by the United States Army. It was not developed or bought and the company ceased operations by the end of the 1940s. Unlike conventional helicopters, the H-2 used a tension-rod drive system to drive the side-by-side rotors. Control of blade pitch was also unconventio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	H-2 MUPSOW The H-2 SOW (Stand-Off Weapon) is a precision-guided glide bomb manufactured by NESCOM and deployed by the Pakistan Air Force, capable of striking targets at stand-off range. It has a terminal guidance system based on an infra-red imaging seeker which identifies the target during the final stage of flight. Designed to hit targets out to 60 km, the bomb may be able to evade radar. According to a Pakistani source, the H-2 is a lighter version of the H-4 SOW. The H-4 is reported by the Pakistani press to have been created by Pakistan's National Engineering and Scientific Commission (NESCOM), working in collaboration with the Pakistan Missile Organisation and Air Weapons Complex in Pakistan. Operational history The H-2 is stated to have entered service with the Pakistan Air Force in 2003. A television-guided version of the H-2 was launched at a mock target from a distance of 60 km by Mirage III/5 fighters of the Pakistan Air Force during a firepower demonstration on 6 Ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	H-IIB H-IIB (H2B) was an expendable space launch system jointly developed by the Japanese government's space agency JAXA and Mitsubishi Heavy Industries. It was used to launch the H-II Transfer Vehicle (HTV, or ''Kōnotori'') cargo spacecraft for the International Space Station. The H-IIB was a liquid-fueled rocket, with solid-fuel strap-on boosters and was launched from the Tanegashima Space Center in southern Japan. H-IIB made its first flight in 2009, and had made a total of nine flights through 2020 with no failures. H-IIB was able to carry a payload of up to to Geostationary transfer orbit (GTO), compared with the payload of 4000-6000 kg for the H-IIA, a predecessor design. Its performance to low Earth orbit (LEO) was sufficient for the H-II Transfer Vehicle (HTV). The first H-IIB was launched in September 2009 and the last H-IIB was launched in May 2020. Development The H-IIB was a space launch vehicle jointly designed, manufactured and operated by JAXA and Mitsubish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	H-IIA H-IIA (H-2A) is an active expendable launch system operated by Mitsubishi Heavy Industries (MHI) for the Japan Aerospace Exploration Agency. These liquid fuel rockets have been used to launch satellites into geostationary orbit; lunar orbiting spacecraft; '' Akatsuki'', which studied the planet Venus; and the Emirates Mars Mission, which was launched to Mars in July 2020. Launches occur at the Tanegashima Space Center. The H-IIA first flew in 2001. , H-IIA rockets were launched 45 times, including 39 consecutive missions without a failure, dating back to 29 November 2003. Production and management of the H-IIA shifted from JAXA to MHI on 1 April 2007. Flight 13, which launched the lunar orbiter SELENE, was the first H-IIA launched after this privatization. The H-IIA is a derivative of the earlier H-II rocket, substantially redesigned to improve reliability and minimize costs. There have been four variants, with two in active service (as of 2020) for various purposes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	H Square In mathematics and control theory, ''H''2, or ''H-square'' is a Hardy space with square norm. It is a subspace of ''L''2 space, and is thus a Hilbert space. In particular, it is a reproducing kernel Hilbert space. On the unit circle In general, elements of ''L''2 on the unit circle are given by :\sum_^\infty a_n e^ whereas elements of ''H''2 are given by :\sum_^\infty a_n e^. The projection from ''L''2 to ''H''2 (by setting ''a''''n'' = 0 when ''n'' < 0) is orthogonal. On the half-plane The Laplace transform $\mathcal$ given by : $s)=\int_0^\infty e^f(t)dt$ can be understood as a linear operator : $\mathcal:L^2(0,\infty)\to H^2\left(\mathbb^+\right)$ where $L^2(0,\infty)$ [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Hardy Space In complex analysis, the Hardy spaces (or Hardy classes) ''Hp'' are certain spaces of holomorphic functions on the unit disk or upper half plane. They were introduced by Frigyes Riesz , who named them after G. H. Hardy, because of the paper . In real analysis Hardy spaces are certain spaces of distributions on the real line, which are (in the sense of distributions) boundary values of the holomorphic functions of the complex Hardy spaces, and are related to the ''Lp'' spaces of functional analysis. For 1 ≤ ''p'' < ∞ these real Hardy spaces ''H^p'' are certain subset s of ''L^p'', while for ''p'' < 1 the ''L^p'' spaces have some undesirable properties, and the Hardy spaces are much better behaved. There are also higher-dimensional generalizations, consisting of certain holomorphic functions on [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	H II Region An H II region or HII region is a region of interstellar atomic hydrogen that is ionized. It is typically in a molecular cloud of partially ionized gas in which star formation has recently taken place, with a size ranging from one to hundreds of light years, and density from a few to about a million particles per cubic centimetre. The Orion Nebula, now known to be an H II region, was observed in 1610 by Nicolas-Claude Fabri de Peiresc by telescope, the first such object discovered. The regions may be of any shape because the distribution of the stars and gas inside them is irregular. Hertzsprung-Russell diagram, The short-lived blue stars created in these regions emit copious amounts of ultraviolet light that ionize the surrounding gas. H II regions—sometimes several hundred light-years across—are often associated with giant molecular clouds. They often appear clumpy and filamentary, sometimes showing intricate shapes such as the Horsehead Nebula. H II regio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Deuterium Deuterium (or hydrogen-2, symbol or deuterium, also known as heavy hydrogen) is one of two stable isotopes of hydrogen (the other being protium, or hydrogen-1). The nucleus of a deuterium atom, called a deuteron, contains one proton and one neutron, whereas the far more common protium has no neutrons in the nucleus. Deuterium has a natural abundance in Earth's oceans of about one atom of deuterium among all atoms of hydrogen (see heavy water). Thus deuterium accounts for approximately 0.0156% by number (0.0312% by mass) of all the naturally occurring hydrogen in the oceans, while protium accounts for more than 99.98%. The abundance of deuterium changes slightly from one kind of natural water to another (see Vienna Standard Mean Ocean Water). ( Tritium is yet another hydrogen isotope, with two neutrons, that is far more rare and is radioactive.) The name ''deuterium'' is derived from the Greek , meaning "second", to denote the two particles composing the nucleus. De ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]

On the half-plane