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Tunable diode laser absorption spectroscopy | Tunable diode laser absorption spectroscopy (TDLAS, sometimes referred to as TDLS, TLS or TLAS) is a technique for measuring the concentration of certain species such as methane, water vapor and many more, in a gaseous mixture using tunable diode lasers and laser absorption spectrometry. The advantage of TDLAS over oth... |
Boiler stay | A boiler stay is an internal structural element of a boiler. Where the shell of a boiler or other pressure vessel is made of cylindrical or (part) spherical elements, the internal pressure will be contained without distortion. However, flat surfaces of any significant size will distort under pressure, tending to bulge.... |
Clarifying agent | Clarifying agents are used to remove suspended solids from liquids by inducing flocculation, causing the solids to form larger aggregates that can be easily removed after they either float to the surface or sink to the bottom of the containment vessel. |
Clear cell sarcoma | Clear cell sarcoma is a rare form of cancer called a sarcoma. It is known to occur mainly in the soft tissues and dermis. Rare forms were thought to occur in the gastrointestinal tract before they were discovered to be different and redesignated as GNET.
Recurrence is common.Clear cell sarcoma's neoplastic cells expres... |
Sodium- and chloride-dependent glycine transporter 1 | Sodium- and chloride-dependent glycine transporter 1, also known as glycine transporter 1, is a protein that in humans is encoded by the SLC6A9 gene which is promising therapeutic target for treatment of diabetes and obesity. |
Dynamical Theory of Crystal Lattices | Dynamical Theory of Crystal Lattices is a book in solid state physics, authored collaboratively by Max Born and Kun Huang. The book was originally started by Born in c. 1940, and was finished in the 1950s by Huang in consultation with Born. The text is considered a classical treatise on the subject of lattice dynamics,... |
Warm inflation | In physical cosmology, warm inflation is one of two dynamical realizations of cosmological inflation. The other is the standard scenario, sometimes called cold inflation.In warm inflation radiation production occurs concurrently with inflationary expansion. This is consistent with the conditions necessary for inflation... |
Kepler conjecture | The Kepler conjecture, named after the 17th-century mathematician and astronomer Johannes Kepler, is a mathematical theorem about sphere packing in three-dimensional Euclidean space. It states that no arrangement of equally sized spheres filling space has a greater average density than that of the cubic close packing (... |
Learning disability | Learning disability, learning disorder, or learning difficulty (British English) is a condition in the brain that causes difficulties comprehending or processing information and can be caused by several different factors. Given the "difficulty learning in a typical manner", this does not exclude the ability to learn in... |
Ramification group | In number theory, more specifically in local class field theory, the ramification groups are a filtration of the Galois group of a local field extension, which gives detailed information on the ramification phenomena of the extension. |
Schumacher criteria | Schumacher criteria are diagnostic criteria that were previously used for identifying multiple sclerosis (MS). Multiple sclerosis, understood as a central nervous system (CNS) condition, can be difficult to diagnose since its signs and symptoms may be similar to other medical problems. Medical organizations have create... |
Srimad Bhagavata Book 2 | The Srimad Bhagavata is one of the main books of Hindu philosophy. The Bhagavata is a devotional account of the Supreme Being and His incarnations. The second book of the Srimad Bhagavata covers the creation of the universe according to Hindu Mythology and gives a summary of the Bhagavata. This book consists of 10 chap... |
Design around | In the field of patents, the phrase "to design around" means to invent an alternative to a patented invention that does not infringe the patent's claims. The phrase can also refer to the invention itself. |
Genu recurvatum | Genu recurvatum is a deformity in the knee joint, so that the knee bends backwards. In this deformity, excessive extension occurs in the tibiofemoral joint. Genu recurvatum is also called knee hyperextension and back knee. This deformity is more common in women and people with familial ligamentous laxity. Hyperextensio... |
Palivizumab | Palivizumab, sold under the brand name Synagis, is a monoclonal antibody produced by recombinant DNA technology used to prevent severe disease caused by respiratory syncytial virus (RSV) infections. It is recommended for infants at high-risk for RSV due to conditions such as prematurity or other medical problems includ... |
Domestic flight | A domestic flight is a form of commercial flight within civil aviation where the departure and the arrival take place in the same country.Airports serving domestic flights only are known as domestic airports.
Domestic flights are generally cheaper and shorter than most international flights. Some international flights ... |
One-parameter group | In mathematics, a one-parameter group or one-parameter subgroup usually means a continuous group homomorphism φ:R→G from the real line R (as an additive group) to some other topological group G . If φ is injective then φ(R) , the image, will be a subgroup of G that is isomorphic to R as an additive group.
One-pa... |
Contourlet | Contourlets form a multiresolution directional tight frame designed to efficiently approximate images made of smooth regions separated by smooth boundaries. The contourlet transform has a fast implementation based on a Laplacian pyramid decomposition followed by directional filterbanks applied on each bandpass subband. |
Maximum-minimums identity | In mathematics, the maximum-minimums identity is a relation between the maximum element of a set S of n numbers and the minima of the 2n − 1 non-empty subsets of S.
Let S = {x1, x2, ..., xn}. The identity states that max min min min {x1,x2,…,xn}, or conversely min max max max {x1,x2,…,xn}.
For a probabilistic proof, s... |
Cricopharyngeal spasm | Cricopharyngeal spasms occur in the cricopharyngeus muscle of the pharynx. Cricopharyngeal spasm is an uncomfortable but harmless and temporary disorder. |
Number form | A number form is a mental map of numbers, which automatically and involuntarily appears whenever someone who experiences number-forms thinks of numbers. Numbers are mapped into distinct spatial locations and the mapping may be different across individuals. Number forms were first documented and named by Sir Francis Gal... |
Forbidden subgraph problem | In extremal graph theory, the forbidden subgraph problem is the following problem: given a graph G , find the maximal number of edges ex (n,G) an n -vertex graph can have such that it does not have a subgraph isomorphic to G . In this context, G is called a forbidden subgraph.An equivalent problem is how many edg... |
JANUS clinical trial data repository | Janus clinical trial data repository is a clinical trial data repository (or data warehouse) standard as sanctioned by the U.S. Food and Drug Administration (FDA). It was named for the Roman god Janus (mythology), who had two faces, one that could see in the past and one that could see in the future. The analogy is tha... |
TTC3P1 | Tetratricopeptide repeat domain 3 pseudogene 1 is a protein that in humans is encoded by the TTC3P1 gene. |
Magnetic shoe closures | Magnetic shoe closures are devices that close shoes using two magnetic bits attached to the shoelaces. The closures can be applied to most shoes. |
Yuxiang shredded pork | Yuxiang shredded pork (simplified Chinese: 鱼香肉丝; traditional Chinese: 魚香肉絲; pinyin: yúxiāng ròusī; sometimes translated as fish-flavored pork slices, or more vaguely as shredded pork with garlic sauce) is a common dish in Sichuan cuisine. Yuxiang is one of the main traditional flavors in Sichuan. |
Verbal Behavior | Verbal Behavior is a 1957 book by psychologist B. F. Skinner, in which he describes what he calls verbal behavior, or what was traditionally called linguistics. Skinner's work describes the controlling elements of verbal behavior with terminology invented for the analysis - echoics, mands, tacts, autoclitics and others... |
NGLY1 deficiency | NGLY1 deficiency is a very rare genetic disorder caused by biallelic pathogenic variants in NGLY1. It is an autosomal recessive disorder. Errors in deglycosylation are responsible for the symptoms of this condition. Clinically, most affected individuals display developmental delay, lack of tears, elevated liver transam... |
Hamburg Notation System | The Hamburg Sign Language Notation System, or HamNoSys, is a transcription system for all sign languages (not only for American Sign Language), with a direct correspondence between symbols and gesture aspects, such as hand location, shape and movement. It was developed in 1985 at the University of Hamburg, Germany. As ... |
MonoGame | MonoGame is a free and open source C# framework used by game developers to make games for multiple platforms and other systems. It is also used to make Windows and Windows Phone games run on other systems. It supports iOS, Android, macOS, tvOS, Linux, PlayStation 4, PlayStation Vita, Xbox One and Nintendo Switch. It im... |
Miniature book | A miniature book is a very small book. Standards for what may be termed a miniature rather than just a small book have changed through time. Today, most collectors consider a book to be miniature only if it is 3 inches or smaller in height, width, and thickness, particularly in the United States. Many collectors consid... |
Antitragus piercing | An antitragus piercing is a perforation of the outer ear cartilage for the purpose of inserting and wearing a piece of jewelry. It is placed in the antitragus, a piece of cartilage opposite the ear canal. Overall, the piercing has characteristics similar to the tragus piercing; the piercings are performed and cared for... |
Microsoft Chrome | Microsoft's Chrome was the code name for a set of APIs that allowed DirectX to be easily accessed from user-space software, including HTML. Launched with some fanfare in early 1998, Chrome, and the related Chromeffects, was re-positioned several times before being canceled only a few months later in a corporate reorgan... |
DCL Technology Demonstrator programme | The US DCL (Detection Classification and Localisation) demonstrator program is aimed at proving that an active torpedo detection system is able to resolve a salvo of torpedoes with sufficient time and accuracy that an anti-torpedo torpedo may be fired back to hit and destroy the threat. |
Microlithography | Microlithography is a general name for any manufacturing process that can create a minutely patterned thin film of protective materials over a substrate, such as a silicon wafer, in order to protect selected areas of it during subsequent etching, deposition, or implantation operations.
The term is normally used for pro... |
Quantum capacity | In the theory of quantum communication, the quantum capacity is the highest rate at which quantum information can be communicated over many independent uses of a noisy quantum channel from a sender to a receiver. It is also equal to the highest rate at which entanglement can be generated over the channel, and forward c... |
Silliness | Silliness is defined as engaging in "a ludicrous folly", showing a "lack of good sense or judgment", or "the condition of being frivolous, trivial, or superficial". In television, film, and the circus, portrayals of silliness such as exaggerated, funny behaviour are used to amuse audiences. Portrayals of silliness, pro... |
Interatomic Coulombic decay | Interatomic Coulombic decay (ICD) is a general, fundamental property of atoms and molecules that have neighbors. Interatomic (intermolecular) Coulombic decay is a very efficient interatomic (intermolecular) relaxation process of an electronically excited atom or molecule embedded in an environment. Without the environm... |
Ideal quotient | In abstract algebra, if I and J are ideals of a commutative ring R, their ideal quotient (I : J) is the set (I:J)={r∈R∣rJ⊆I} Then (I : J) is itself an ideal in R. The ideal quotient is viewed as a quotient because KJ⊆I if and only if K⊆(I:J) . The ideal quotient is useful for calculating primary decompositions. It al... |
Trace zero cryptography | In 1998 Gerhard Frey firstly proposed using trace zero varieties for cryptographic purpose. These varieties are subgroups of the divisor class group on a low genus hyperelliptic curve defined over a finite field. These groups can be used to establish asymmetric cryptography using the discrete logarithm problem as crypt... |
FRW/CFT duality | The FRW/CFT duality is a conjectured duality for Friedmann–Robertson–Walker models inspired by the AdS/CFT correspondence. It assumes that the cosmological constant is exactly zero, which is only the case for models with exact unbroken supersymmetry. Because the energy density does not approach zero as we approach spat... |
Farrier | A farrier is a specialist in equine hoof care, including the trimming and balancing of horses' hooves and the placing of shoes on their hooves, if necessary. A farrier combines some blacksmith's skills (fabricating, adapting, and adjusting metal shoes) with some veterinarian's skills (knowledge of the anatomy and physi... |
Mode 3 (telephone) | In telephony, mode 3 is a method of line sharing in which the line passes through a device (the mode 3 device) to connect to other devices. This enables the mode 3 device to control the line, and gain priority in need.
It is a common alternative to parallel connection. |
Hovione | Hovione is a Contract Development and Manufacturing Organization (CDMO) with services for drug substance, drug product intermediate and drug product. The company has four FDA inspected sites in the United States, Portugal, Ireland and China development laboratories in Lisbon, Portugal and New Jersey, USA. Hovione is al... |
Lyryx Learning | Lyryx Learning (Lyryx) is an educational software company offering open educational resources (OERs) paired with online homework & exams for undergraduate introductory courses in Mathematics & Statistics and Business & Economics. |
5-Formamidoimidazole-4-carboxamide ribotide | 5-Formamidoimidazole-4-carboxamide ribotide (or FAICAR) is an intermediate in the formation of purines.
It is formed by the enzyme AICAR transformylase from AICAR and 10-formyltetrahydrofolate. |
Sotolon | Sotolon (also known as sotolone) is a lactone and an extremely powerful aroma compound, with the typical smell of fenugreek or curry at high concentrations and maple syrup, caramel, or burnt sugar at lower concentrations. Sotolon is the major aroma and flavor component of fenugreek seed and lovage, and is one of severa... |
Serial Line Internet Protocol | The Serial Line Internet Protocol (SLIP) is an encapsulation of the Internet Protocol designed to work over serial ports and router connections. It is documented in RFC 1055. On personal computers, SLIP has largely been replaced by the Point-to-Point Protocol (PPP), which is better engineered, has more features, and do... |
XMLGUI | XMLGUI is a KDE framework for designing the user interface of an application using XML, using the idea of actions.
In this framework, the programmer designs various actions that their application can implement, with several actions defined for the programmer by the KDE framework, such as opening a file or closing the a... |
Power walking | Power walking or speed walking is the act of walking with a speed at the upper end of the natural range for the walking gait, typically 7 to 9 km/h (4.5 to 5.5 mph). To qualify as power walking as opposed to jogging or running, at least one foot must be in contact with the ground at all times (see walking for a formal ... |
Anterior cerebral artery | The anterior cerebral artery (ACA) is one of a pair of cerebral arteries that supplies oxygenated blood to most midline portions of the frontal lobes and superior medial parietal lobes of the brain. The two anterior cerebral arteries arise from the internal carotid artery and are part of the circle of Willis. The left ... |
Alternansucrase | In enzymology, an alternansucrase (EC 2.4.1.140) is an enzyme that catalyzes a chemical reaction that transfers an alpha-D-glucosyl residue from sucrose alternately to the 6- and 3-positions of the non-reducing terminal residue of an alpha-D-glucan, thereby creating a glucan with alternating alpha-1,6- and alpha-1,3-bo... |
TD-1 RNA motif | The TD-1 RNA motif is a conserved RNA structure found only in the species Treponema denticola, at least among bacteria whose genomes were sequenced in 2007 when the RNA motif was identified. The T. denticola genome contains 28 predicted TD-1 RNAs, and all but two of these are positioned such that they are likely to be ... |
E (theorem prover) | E is a high-performance theorem prover for full first-order logic with equality. It is based on the equational superposition calculus and uses a purely equational paradigm. It has been integrated into other theorem provers and it has been among the best-placed systems in several theorem proving competitions. E is devel... |
Coloration evidence for natural selection | Animal coloration provided important early evidence for evolution by natural selection, at a time when little direct evidence was available. Three major functions of coloration were discovered in the second half of the 19th century, and subsequently used as evidence of selection: camouflage (protective coloration); mim... |
Wingman (social) | Wingman (or wingmate) is a role that a person may take when a friend needs support with approaching potential romantic partners. People who have a wingman can have more than one wingman. A wingman is someone who is on the "inside" and is used to help someone with intimate relationships. In general, one person's wingman... |
Porphyridium cruentum | Porphyridium cruentum is a species of red algae in the family Porphyridiophyceae. |
Poncirin | Poncirin is the 7-O-neohesperidoside of isosakuranetin. Poncirin can be extracted from trifoliate orange (Poncirus trifoliata). |
Vibratory shear-enhanced process | Vibratory shear enhanced process (VSEP) is a membrane separation technology platform invented in 1987 and patented in 1989 by Dr. J. Brad Culkin. VSEP's vibration system was designed to prevent membrane fouling, or the build-up of solid particles on the surface of the membrane. VSEP systems have been applied in a varie... |
Rage comic | A rage comic is a short cartoon strip using a growing set of pre-made cartoon faces, or rage faces, which usually express rage or some other simple emotion or activity. They are usually crudely drawn in Microsoft Paint or other simple drawing programs, and were most popular in the early 2010s. These webcomics have spre... |
Linear video editing | Linear video editing is a video editing post-production process of selecting, arranging and modifying images and sound in a predetermined, ordered sequence. Regardless of whether it was captured by a video camera, tapeless camcorder, or recorded in a television studio on a video tape recorder (VTR) the content must be ... |
Underhook | An underhook is a clinch hold that is used in grappling to control the opponent. It is performed from any direction by putting an arm under the opponent's arm, and holding the opponent's midsection or upper body. Having an underhook with one arm is called a single underhook, while having underhooks with both arms is kn... |
Effects of parasitic worms on the immune system | The effects of parasitic worms, or helminths, on the immune system is a recently emerging topic of study among immunologists and other biologists. Experiments have involved a wide range of parasites, diseases, and hosts. The effects on humans have been of special interest. The tendency of many parasitic worms to pacify... |
Turntable anti-skating | Turntable anti-skating is a feature used in phonograph turntables to prevent skating of the tonearm. |
Noncommutative signal-flow graph | In automata theory and control theory, branches of mathematics, theoretical computer science and systems engineering, a noncommutative signal-flow graph is a tool for modeling interconnected systems and state machines by mapping the edges of a directed graph to a ring or semiring.
A single edge weight might represent a... |
Pentachlorobenzenethiol | Pentachlorobenzenethiol is a chemical compound from the group of thiols and organochlorine compounds. The chemical formula is C6HCl5S. |
SANDDE | SANDDE was a software and hardware system, developed primarily by IMAX Corporation, designed to create hand-drawn, stereoscopic 3D animation content. SANDDE is an acronym for "Stereoscopic ANimation Drawing DEvice" and is a play on the Japanese term for "3D", which is pronounced "San-D". |
LONGi | Xi'an LONGi Silicon Materials Corporation is a Chinese silicon producer. LONGi was established in 2000 and is the world's largest monocrystalline silicon producer. Baoshen Zhong is LONGi's chairman. |
High-low skirt | High-low skirts, also known as asymmetrical, waterfall, or mullet skirts, are skirts with a hem that is higher in the front, or side, than in the back. |
Ubuntu User | Ubuntu User is a paper magazine that was launched by Linux New Media AG in May 2009.The publication is aimed at users of the Ubuntu operating system and focuses on reviews, community news, how to articles and troubleshooting tips. It also includes a Discovery Guide aimed at beginners. |
Technosphera (publisher) | Technosphera is a primary Russian scientific and technologic literature publisher. Since 1996 it has been publishing books and magazines about science and technology. |
IntelliPoint | Microsoft IntelliPoint is the Microsoft-branded software driver for the company's hardware mice. Microsoft has released versions for both Windows and Mac OS X. It has been succeeded by Microsoft Mouse and Keyboard Center, which combines IntelliType (a Microsoft keyboard driver) with IntelliPoint. |
Dynamic aperture (accelerator physics) | The dynamic aperture is the stability region of phase space in a circular accelerator. |
Key (instrument) | A key is a component of a musical instrument, the purpose and function of which depends on the instrument. However, the term is most often used in the context of keyboard instruments, in which case it refers to the exterior part of the instrument that the player physically interacts in the process of sound production.
... |
ISO 25178 | ISO 25178: Geometrical Product Specifications (GPS) – Surface texture: areal is an International Organization for Standardization collection of international standards relating to the analysis of 3D areal surface texture. |
Whistle-stop train tour | A whistle stop or whistle-stop tour is a style of political campaigning where the politician makes a series of brief appearances or speeches at a number of small towns over a short period of time. Originally, whistle-stop appearances were made from the open platform of an observation car or a private railroad car. |
Intel 8289 | The Intel 8289 is a Bus arbiter designed for Intel 8086/8087/8088/8089. The chip is supplied in 20-pin DIP package. The 8086 (and 8088) operate in maximum mode, so they are configured primarily for multiprocessor operation or for working with coprocessors. Necessary control signals are generated by the 8289. This versi... |
Mechanical heat treatment | Mechanical heat treatment (MHT) is an alternative waste treatment technology. This technology is also commonly termed autoclaving. MHT involves a mechanical sorting or pre-processing stage with technology often found in a material recovery facility. The mechanical sorting stage is followed by a form of thermal treatmen... |
I. M. Sechenov Institute of Evolutionary Physiology and Biochemistry | The I. M. Sechenov Institute of Evolutionary Physiology and Biochemistry (IEPHB) is a facility in Saint Petersburg, Russia, dedicated to research in the fields of biochemistry and evolutionary physiology. |
Hopp–Woods scale | The Hopp–Woods hydrophilicity scale of amino acids is a method of ranking the amino acids in a protein according to their water solubility in order to search for surface locations on proteins, and especially those locations that tend to form strong interactions with other macromolecules such as proteins, DNA, and RNA.G... |
Peter Kohl (scientist) | Peter Kohl FAHA FHRS FTPS FIUPS is a scientist specializing in integrative cardiac research. He studies heterocellular electrophysiological interactions in cardiac tissue, myocardial structure-function relationships using 'wet' and 'dry' lab models, and mechano-electrical autoregulation of the heart. |
Cuban sunset | A Cuban sunset is cocktail made from rum and a mixture of lemonade, lime soda, guava nectar, and grenadine syrup. |
Benzaldehyde dehydrogenase (NAD+) | In enzymology, a benzaldehyde dehydrogenase (NAD+) (EC 1.2.1.28) is an enzyme that catalyzes the chemical reaction benzaldehyde + NAD+ + H2O ⇌ benzoate + NADH + 2 H+The 3 substrates of this enzyme are benzaldehyde, NAD+, and H2O, whereas its 3 products are benzoate, NADH, and H+. |
CRACR2A | Calcium release activated channel regulator 2A is a protein that in humans is encoded by the CRACR2A gene. |
Dashboard of Sustainability | The Dashboard of Sustainability is a free-of-charge, non-commercial software package configured to convey the complex relationships among economic, social, and environmental issues. |
Gribenes | Gribenes or grieven (Yiddish: גריבענעס, [ˈɡrɪbənəs], "cracklings"; Hebrew: גלדי שומן) is a dish consisting of crisp chicken or goose skin cracklings with fried onions. |
MDMB-CHMICA | MDMB-CHMICA is an indole-based synthetic cannabinoid that is a potent agonist of the CB1 receptor and has been sold online as a designer drug. While MDMB-CHMICA was initially sold under the name "MMB-CHMINACA", the compound corresponding to this code name (i.e. the isopropyl instead of t-butyl analogue of MDMB-CHMINACA... |
Turtle graphics | In computer graphics, turtle graphics are vector graphics using a relative cursor (the "turtle") upon a Cartesian plane (x and y axis). Turtle graphics is a key feature of the Logo programming language. |
Snub triheptagonal tiling | In geometry, the order-3 snub heptagonal tiling is a semiregular tiling of the hyperbolic plane. There are four triangles and one heptagon on each vertex. It has Schläfli symbol of sr{7,3}. The snub tetraheptagonal tiling is another related hyperbolic tiling with Schläfli symbol sr{7,4}. |
Andreas Zimmer | Andreas Zimmer is Professor of Neurobiology and Director of the Institute for Molecular Psychiatry at the University of Bonn; he was previously professor at the University of Bielefeld and a researcher at the National Institute of Mental Health. He is perhaps best known in the field of cannabinoid research. His most ci... |
Cakewalk (carnival game) | Cakewalk (or cake-walk) is a game played at carnivals, funfairs, and fundraising events. It is similar to a raffle and musical chairs. |
The Vital Question | The Vital Question is a book by the English biochemist Nick Lane about the way the evolution and origin of life on Earth was constrained by the provision of energy. |
DDX3X | ATP-dependent RNA helicase DDX3X is an enzyme that in humans is encoded by the DDX3X gene. |
Associative interference | Associative interference is a cognitive theory established on the concept of associative learning, which suggests that the brain links related elements. When one element is stimulated, its associates can also be activated. The most known study demonstrating the credibility of this concept was Pavlov's experiment in 192... |
Variable-frequency drive | A variable-frequency drive (VFD, or adjustable-frequency drives, adjustable-speed drives), variable-speed drives, AC drives, micro drives, inverter drives, or drives) is a type of AC motor drive (system incorporating a motor) that controls speed and torque by varying the frequency of the input electricity. Depending on... |
Jury rigging | In maritime transport terms, and most commonly in sailing, jury-rigged is an adjective, a noun, and a verb. It can describe the actions of temporary makeshift running repairs made with only the tools and materials on board; and the subsequent results thereof. The origin of jury-rigged and jury-rigging lies in such effo... |
Corey–House synthesis | The Corey–House synthesis (also called the Corey–Posner–Whitesides–House reaction and other permutations) is an organic reaction that involves the reaction of a lithium diorganylcuprate ( CuLi ) with an organic halide or pseudohalide ( R′−X ) to form a new alkane, as well as an ill-defined organocopper species and lith... |
Paper soccer | Paper soccer (or paper hockey) is an abstract strategy game played on a square grid representing a soccer or hockey field. Two players take turns extending a line representing the position of a ball until it reaches one of the grid's two-goal spaces. A traditional paper-and-pencil game, it is commonly played in schools... |
Song bells | Song bells are a musical instrument in the keyboard percussion family. They are a mallet percussion instrument in the metallophone family that is essentially a cross between the vibraphone, glockenspiel, and celesta. They have bars made of aluminum.They sound one octave down from the glockenspiel, or one octave above c... |
2,2'-Dipyrromethene | 2,2'-Dipyrromethene, often called just dipyrromethene or dipyrrin, is a chemical compound with formula C9H8N2 whose skeleton can be described as two pyrrole rings C5N connected by a methyne bridge =CH– through their nitrogen-adjacent (position-2) carbons; the remaining bonds being satisfied by hydrogen atoms. It is an ... |
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