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Hbar
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H-bar or h-bar can refer to: * H with stroke, a Latin letter H with a doubled horizontal stroke (Ħ ħ) **Voiceless pharyngeal fricative, represented in IPA by * Reduced Planck constant, in which the above symbol represents as a mathematical symbol, ''ħ'' = ''h''/(2''π'') * Antihydrogen, an antimatter element represented by the symbol * Steyr AUG HBAR, a light machine gun version of the AUG assault rifle * Multirests, indicated in musical notation through H-bars * HBAR cryptocurrency, for Hedera Hashgraph's public distributed ledger See also *Horizontal bar * *Maltese alphabet The Maltese alphabet is based on the Latin alphabet with the addition of some letters with diacritic marks and digraphs. It is used to write the Maltese language, which evolved from the otherwise extinct Siculo-Arabic dialect, as a result of 800 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reduced Planck Constant
The Planck constant, or Planck's constant, is a fundamental physical constant of foundational importance in quantum mechanics. The constant gives the relationship between the energy of a photon and its frequency, and by the mass-energy equivalence, the relationship between mass and frequency. Specifically, a photon's energy is equal to its frequency multiplied by the Planck constant. The constant is generally denoted by h. The reduced Planck constant, or Dirac constant, equal to the constant divided by 2 \pi, is denoted by \hbar. In metrology it is used, together with other constants, to define the kilogram, the SI unit of mass. The SI units are defined in such a way that, when the Planck constant is expressed in SI units, it has the exact value The constant was first postulated by Max Planck in 1900 as part of a solution to the ultraviolet catastrophe. At the end of the 19th century, accurate measurements of the spectrum of black body radiation existed, but the distribut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
H With Stroke
Ħ (minuscule: ħ) is a letter of the Latin alphabet, derived from H with the addition of a bar. It is used in Maltese for a voiceless pharyngeal fricative consonant (corresponding to the letter ''heth'' of Semitic abjads: ar, ح, he, ח). Lowercase is used in the International Phonetic Alphabet for the same sound. In Unicode, the special character ℏ (U+210F), represents the reduced Planck constant of quantum mechanics. In this context, it is pronounced "h-bar". The lowercase resembles the Cyrillic letter Tshe (ћ), or the astronomical symbol of Saturn (♄). A white uppercase Ħ on a red square was the logo of Heritage Malta until 2022. It is used as the symbol for Hedera Hashgraph's native cryptocurrency, HBAR. Computer encoding As a part of WGL-4 Windows Glyph List 4, or more commonly WGL4 for short, also known as the ''Pan-European character set'', is a character repertoire on Microsoft operating systems comprising 657 Unicode characters, two of them private ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Voiceless Pharyngeal Fricative
The voiceless pharyngeal fricative is a type of consonantal sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is an h-bar, , and the equivalent X-SAMPA symbol is X\. In the transcription of Arabic, Berber and Hebrew as well as a few other scripts, it is often written , . Typically characterized as a fricative in the upper pharynx, it is often characterized as a whispered Features Features of the voiceless pharyngeal fricative: Occurrence This sound is the most commonly cited realization of the Semitic letter hēth, which occurs in all dialects of Arabic, Classical Syriac, as well as Biblical and Tiberian Hebrew but only a minority of speakers of Modern Hebrew. It has also been reconstructed as appearing in Ancient Egyptian, a related Afro-Asiatic language. Modern non- Oriental Hebrew has merged the voiceless pharyngeal fricative with the voiceless velar (or uvular) fricative. However, phonetic studi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antihydrogen
Antihydrogen () is the antimatter counterpart of hydrogen. Whereas the common hydrogen atom is composed of an electron and proton, the antihydrogen atom is made up of a positron and antiproton. Scientists hope that studying antihydrogen may shed light on the question of why there is more matter than antimatter in the observable universe, known as the baryon asymmetry problem. Antihydrogen is produced artificially in particle accelerators. Experimental history Accelerators first detected hot antihydrogen in the 1990s. ATHENA studied cold in 2002. It was first trapped by the Antihydrogen Laser Physics Apparatus (ALPHA Collaboration, ALPHA) team at CERN in 2010, who then measured the structure and other important properties. ALPHA, AEGIS, and GBAR plan to further cool and study atoms. 1s–2s transition measurement In 2016, the ALPHA experiment measured the atomic electron transition between the two lowest energy levels of antihydrogen, 1s–2s. The results, which are identical t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steyr AUG HBAR
The Steyr AUG () is an Austrian bullpup assault rifle chambered for the 5.56×45mm NATO intermediate cartridge, designed in the 1960s by Steyr-Daimler-Puch, and now manufactured by Steyr Arms GmbH & Co KG. It was adopted by the Austrian Army in 1978 as the StG 77 (''Sturmgewehr 77''), where it replaced the 7.62×51mm NATO Sturmgewehr 58, StG 58 automatic rifle (a licence-built FN FAL).Ezell (1993) p. 223 In production since 1978, it is the standard small arm of the ''Bundesheer'' and various Federal Police (Austria), Austrian federal police units, and its variants have also been adopted by the armed forces of dozens of countries, with some using it as a standard-issue service rifle. Steyr AUG importation into the United States began in the 1980s as the AUG/SA (SA denoting semiautomatic). President George H.W. Bush banned the AUG via an executive order under the Federal Assault Weapons Ban, 1989 Assault Weapon Import Ban. Six years into the ban, AUG buyers gained a reprieve as c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multirest
Tacet is Latin which translates literally into English as "(it) is silent" (pronounced: , , or ). It is a musical term to indicate that an instrument or voice does not sound, also known as a rest. In vocal polyphony and in orchestral scores, it usually indicates a long period of time, typically an entire movement. In more modern music such as jazz, tacet tends to mark considerably shorter breaks. Multirests, or multiple-measure rests, are rests which last multiple measures (or multiple rests, each of which lasts an entire measure). It was common for early symphonies to leave out the brass or percussion in certain movements, especially in slow (second) movements, and this is the instruction given in the parts for the player to wait until the end of the movement. It is also commonly used in accompaniment music to indicate that the instrument does not play on a certain run through a portion of the music, e.g. "Tacet 1st time." The phrase ''tacet al fine'' is used to indicate t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hashgraph
Hashgraph is a distributed ledger technology that has been described as an alternative to blockchains. The hashgraph technology is currently patented, is used by the public ledger Hedera, and there is a grant to implement the patent as a result of the Apache 2.0's Grant of Patent License (provision #3) so long as the implementation conforms to the terms of the Apache license. The native cryptocurrency of the Hedera Hashgraph system is HBAR. Unlike blockchains, hashgraphs do not bundle data into blocks or use miners to validate transactions. Instead, hashgraphs use a "gossip about gossip" protocol where the individual nodes on the network "gossip" about transactions to create directed acyclic graphs that time-sequence transactions. Each "gossip" message contains one or more transactions plus a timestamp, a digital signature, and cryptographic hashes of two earlier events. This makes Hashgraph form an asynchronous Byzantine Fault-Tolerant (aBFT) consensus algorithm. Hashgraph w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horizontal Bar
The horizontal bar, also known as the high bar, is an apparatus used by male gymnasts in artistic gymnastics. It traditionally consists of a cylindrical metal (typically steel) bar that is rigidly held above and parallel to the floor by a system of cables and stiff vertical supports. Gymnasts typically wear suede leather grips while performing on the bar. Current elite-level competition uses a stainless steel core rail. The gymnastics elements performed on the horizontal bar are regulated by a Code of Points. A bar routine, which is a sequence of several bar skills, usually includes giants with various grips (overgrip, undergrip, dorsal grip, mixed grip), in-bar work, turns, release and regrasp skills, and a dismount. The horizontal bar is often considered one of the most exciting gymnastics events due to the power exhibited by gymnasts during giant swings and spectacular aerial releases and dismounts that often include multiple flips or twists and, in some cases, airborne tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
