text stringlengths 11 320k | source stringlengths 26 161 |
|---|---|
The Robinson–Dadson curves are one of many sets of equal-loudness contours for the human ear , determined experimentally by D. W. Robinson and R. S. Dadson. [ 1 ]
Until recently, it was common to see the term Fletcher–Munson used to refer to equal-loudness contours generally, even though the re-determination carried o... | https://en.wikipedia.org/wiki/Robinson–Dadson_curves |
The Robinson–Gabriel synthesis is an organic reaction in which a 2-acylamino- ketone reacts intramolecularly followed by a dehydration to give an oxazole . A cyclodehydrating agent is needed to catalyze the reaction [ 1 ] [ 2 ] [ 3 ] It is named after Sir Robert Robinson and Siegmund Gabriel who described the reaction ... | https://en.wikipedia.org/wiki/Robinson–Gabriel_synthesis |
In mathematics , the Robinson–Schensted–Knuth correspondence , also referred to as the RSK correspondence or RSK algorithm , is a combinatorial bijection between matrices A with non-negative integer entries and pairs ( P , Q ) of semistandard Young tableaux of equal shape, whose size equals the sum of the entries of A ... | https://en.wikipedia.org/wiki/Robinson–Schensted–Knuth_correspondence |
RoboTurb is a welding robot used to repair turbine blades developed at Universidade Federal de Santa Catarina . It is a redundant robot with a flexible rail. [ 1 ]
The Roboturb project started in 1998 at the Universidade Federal de Santa Catarina initially with the support of the Brazilian Government and the public po... | https://en.wikipedia.org/wiki/RoboTurb |
Robocasting (also known as robotic material extrusion [ 1 ] ) is an additive manufacturing technique analogous to Direct Ink Writing and other extrusion-based 3D-printing techniques in which a filament of a paste-like material is extruded from a small nozzle while the nozzle is moved across a platform. [ 2 ] The object... | https://en.wikipedia.org/wiki/Robocasting |
The Robocrane is a kind of manipulator resembling a Stewart platform but using an octahedral assembly of cables instead of struts. Like the Stewart platform, the Robocrane has six degrees of freedom (x, y, z, pitch, roll, & yaw).
It was developed by Dr. James S. Albus of the US National Institute of Standards and Tec... | https://en.wikipedia.org/wiki/Robocrane |
Beijing Roborock Technology Co. Ltd. , branded as Roborock , is a Chinese consumer goods company known for its robotic sweeping and mopping devices [ 1 ] and handheld cordless stick vacuums . Xiaomi played a key role in the company's founding. [ 2 ]
Beijing Roborock Technology Co. Ltd. was founded in 2014 in Beijing ,... | https://en.wikipedia.org/wiki/Roborock |
The Robot Constitution is a security ruleset part of AutoRT set by Google DeepMind in January 2024 for its AI products. The rules are inspired by Asimov 's Three Laws of Robotics .The rules are applied to the underlying large language models of the helper robots. [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] [ 6 ] Rule number 1 is a r... | https://en.wikipedia.org/wiki/Robot_Constitution |
The Robot Interaction Language ( ROILA ) is the first spoken language created specifically for talking to robots. [ 1 ] ROILA is being developed by the Department of Industrial Design at Eindhoven University of Technology . The major goals of ROILA are that it should be easily learnable by the user, and optimized for e... | https://en.wikipedia.org/wiki/Robot_Interaction_Language |
Robot ethics , sometimes known as " roboethics ", concerns ethical problems that occur with robots, such as whether robots pose a threat to humans in the long or short run, whether some uses of robots are problematic (such as in healthcare or as " killer robots " in war), and how robots should be designed such that the... | https://en.wikipedia.org/wiki/Robot_ethics |
Robot Research Initiative (RRI) is a research institute dedicated to advanced robotics research. It is an affiliated organization of Chonnam National University in Gwangju , Republic of Korea . Prof. Jong Oh Park moved from the Korea Institute of Science and Technology to Chonnam National University in early 2005 and e... | https://en.wikipedia.org/wiki/Robot_research_initiative |
The Robotech Defenders are a line of scale model kits released by Revell during the early 1980s with an accompanying limited comic series published by DC Comics. Contrary to what their name seems to imply, the "'Robotech Defenders'" are not part of the Robotech anime universe adapted by Carl Macek and released by Harm... | https://en.wikipedia.org/wiki/Robotech_Defenders |
Robotic magnetic navigation ( RMN ) (also called remote magnetic navigation) uses robotic technology to direct magnetic fields which control the movement of magnetic-tipped endovascular catheters into and through the chambers of the heart during cardiac catheterization procedures. [ 1 ]
Because the human heart beats d... | https://en.wikipedia.org/wiki/Robotic_magnetic_navigation |
Robotic sperm (also called spermbots ) are biohybrid microrobots consisting of sperm cells and artificial microstructures. [ 1 ] [ 2 ] [ 3 ] Currently there are two types of spermbots. The first type, the tubular spermbot, consists of a single sperm cell that is captured inside a microtube. Single bull sperm cells ente... | https://en.wikipedia.org/wiki/Robotic_sperm |
A robotic vacuum cleaner , sometimes called a robovac or a roomba as a generic trademark , is an autonomous vacuum cleaner which has a limited vacuum floor cleaning system combined with sensors and robotic drives with programmable controllers and cleaning routines. Early designs included manual operation via remote con... | https://en.wikipedia.org/wiki/Robotic_vacuum_cleaner |
Robotics engineering is a branch of engineering that focuses on the conception, design, manufacturing, and operation of robots . It involves a multidisciplinary approach, drawing primarily from mechanical , electrical , software , and artificial intelligence (AI) engineering . [ 1 ] [ 2 ]
Robotics engineers are tasked... | https://en.wikipedia.org/wiki/Robotics_engineering |
A robotic android , also known simply as a robot android , robotic droid , robot droid , robotoid , robodroid or roboid , is an artificial lifeform that is created through processes that are different from cloning or synthetics. In short, it is the cybernetic equivalent of an android .
Perhaps the first mention of "ro... | https://en.wikipedia.org/wiki/Robotoid |
ROBOTY ( Arabic : روبوتي ) is a differential wheeled robot with self-balancing, motion, speech and object recognition capabilities. ROBOTY is also the first autonomous robot in Yemen , all of which will be primarily controlled by voice commands . The final goal of this research project is to build a robot capable of p... | https://en.wikipedia.org/wiki/Roboty |
A rodent-borne virus , abbreviated as robovirus , is a zoonotic virus that is transmitted by a rodent vector. [ 1 ] [ 2 ]
Roboviruses mainly belong to the virus families Arenaviridae and Hantaviridae . [ 3 ] [ 4 ] Like arbovirus ( ar thropod bo rne) and tibovirus ( ti ck bo rne) the name refers to its method of transm... | https://en.wikipedia.org/wiki/Robovirus |
Robust Header Compression ( ROHC ) is a standardized method to compress the IP , UDP , UDP-Lite , RTP , and TCP headers of Internet packets.
In streaming applications, the overhead of IP, UDP, and RTP is 40 bytes for IPv4 , or 60 bytes for IPv6 . For VoIP , this corresponds to around 60% of the total amount of data se... | https://en.wikipedia.org/wiki/Robust_Header_Compression |
In mathematics, specifically in computational geometry , geometric nonrobustness is a problem wherein branching decisions in computational geometry algorithms are based on approximate numerical computations, leading to various forms of unreliability including ill-formed output and software failure through crashing or i... | https://en.wikipedia.org/wiki/Robust_geometric_computation |
Robust random early detection ( RRED ) is a queueing discipline for a network scheduler . The existing random early detection (RED) algorithm and its variants are found vulnerable to emerging attacks, especially the Low-rate Denial-of-Service attacks (LDoS). Experiments have confirmed that the existing RED-like algorit... | https://en.wikipedia.org/wiki/Robust_random_early_detection |
Robustification is a form of optimisation whereby a system is made less sensitive to the effects of random variability , or noise , that is present in that system's input variables and parameters . The process is typically associated with engineering systems , but the process can also be applied to a political policy ,... | https://en.wikipedia.org/wiki/Robustification |
In evolutionary biology , robustness of a biological system (also called biological or genetic robustness [ 1 ] ) is the persistence of a certain characteristic or trait in a system under perturbations or conditions of uncertainty. [ 2 ] [ 3 ] Robustness in development is known as canalization . [ 4 ] [ 5 ] According t... | https://en.wikipedia.org/wiki/Robustness_(evolution) |
In celestial mechanics , the Roche limit , also called Roche radius , is the distance from a celestial body within which a second celestial body, held together only by its own force of gravity , will disintegrate because the first body's tidal forces exceed the second body's self-gravitation . [ 1 ] Inside the Roche li... | https://en.wikipedia.org/wiki/Roche_limit |
This is a compilation of the properties of different analog materials used to simulate deformational processes in structural geology. Such experiments are often called analog or analogue models . The organization of this page follows the review of rock analog materials in structural geology and tectonics of Reber et al... | https://en.wikipedia.org/wiki/Rock_analogs_for_structural_geology |
A rock hyrax midden is a stratified accumulation of fecal pellets and a brown amber-like a urinary product known as hyraceum excreted by the rock hyrax and closely related species. [ 1 ]
Hyrax middens form very slowly (ranging from ~5 years to >1000 years for 1 mm of hyraceum accumulation [ 2 ] [ 3 ] ), over long peri... | https://en.wikipedia.org/wiki/Rock_hyrax_midden |
Rock mechanics is a theoretical and applied science of the mechanical behavior of rocks and rock masses. [ 1 ]
Compared to geology, it is the branch of mechanics concerned with the response of rock and rock masses to the force fields of their physical environment. [ 1 ]
Rock mechanics is part of a much broader subjec... | https://en.wikipedia.org/wiki/Rock_mechanics |
A rock shed is a civil engineering structure used in mountainous areas where rock slides and land slides create highway closure problems. A rock shed is built over a roadway that is in the path of the slide. They are equally used to protect railroads. [ 1 ] They are usually designed as a heavy reinforced concrete cove... | https://en.wikipedia.org/wiki/Rock_shed |
A rockbreaker is a machine designed to manipulate large rocks, including reducing large rocks into smaller rocks. They are typically used in the mining industry to remove oversize rocks that are too large or too hard to be reduced in size by a crusher . Rockbreakers consist of two major components, a hydraulic hammer (... | https://en.wikipedia.org/wiki/Rockbreaker |
Designed by Vannevar Bush after he became director of the Carnegie Institution for Science in Washington DC, the Rockefeller Differential Analyzer (RDA) was an all-electronic version of the Differential Analyzer , which Bush had built at the Massachusetts Institute of Technology between 1928 and 1931. [ 1 ]
The RDA wa... | https://en.wikipedia.org/wiki/Rockefeller_Differential_Analyzer |
A Rocker Shovel Loader , sometimes simply referred to as a Rocker Shovel or Mucker is a type of mechanical loader used in underground mining . [ 1 ]
A Rocker Shovel is usually powered by compressed air, or in some cases electricity. It is commonly mounted on steel wheels designed to run on narrow gauge rails, with som... | https://en.wikipedia.org/wiki/Rocker_Shovel_Loader |
A rocker box (also known as a cradle or a big box) is a gold mining implement for separating alluvial placer gold from sand and gravel which was used in placer mining in the 19th century. It consists of a high-sided box, which is open on one end and on top, [ 1 ] and was placed on rockers .
The inside bottom of the bo... | https://en.wikipedia.org/wiki/Rocker_box |
A rocket sled launch , also known as ground-based launch assist , catapult launch assist , and sky-ramp launch , is a proposed method for launching space vehicles. With this concept the launch vehicle is supported by an eastward pointing rail or maglev track that goes up the side of a mountain while an externally appli... | https://en.wikipedia.org/wiki/Rocket_sled_launch |
A rockfall or rock-fall [ 1 ] is a quantity of rock that has fallen freely from a cliff face. The term is also used for collapse of rock from roof or walls of mine or quarry workings. A rockfall is "a fragment of rock (a block) detached by sliding, toppling, or falling, that falls along a vertical or sub-vertical cliff... | https://en.wikipedia.org/wiki/Rockfall |
Rockwell Collins, Inc. was a multinational corporation headquartered in Cedar Rapids , Iowa , providing avionics and information technology systems and services to government agencies and aircraft manufacturers . It was formed when the Collins Radio Company , facing financial difficulties, was purchased by Rockwell Int... | https://en.wikipedia.org/wiki/Rockwell_Collins |
The Rocky Mountain Arsenal was a United States chemical weapons manufacturing center located in the Denver Metropolitan Area in Commerce City , Colorado. The site was completed December 1942, [ 1 ] operated by the United States Army throughout the later 20th century and was controversial among local residents until its... | https://en.wikipedia.org/wiki/Rocky_Mountain_Arsenal |
A rocky shore is an intertidal area of seacoasts where solid rock predominates. Rocky shores are biologically rich environments, and are a useful "natural laboratory" for studying intertidal ecology and other biological processes. Due to their high accessibility, they have been well studied for a long time and their sp... | https://en.wikipedia.org/wiki/Rocky_shore |
Rod calculus or rod calculation was the mechanical method of algorithmic computation with counting rods in China from the Warring States to Ming dynasty before the counting rods were increasingly replaced by the more convenient and faster abacus . Rod calculus played a key role in the development of Chinese mathematics... | https://en.wikipedia.org/wiki/Rod_calculus |
In Greek mythology , the Rod of Asclepius (⚕; / æ s ˈ k l iː p i ə s / , Ancient Greek : Ῥάβδος τοῦ Ἀσκληπιοῦ , Rhábdos toû Asklēpioû , sometimes also spelled Asklepios ), also known as the Staff of Aesculapius and as the asklepian , [ 1 ] is a serpent-entwined rod wielded by the Greek god Asclepius , a deity associate... | https://en.wikipedia.org/wiki/Rod_of_Asclepius |
NASA 's Rodent Research Hardware System [ 1 ] provides a research platform aboard the International Space Station for long-duration experiments on rodents in space. Such experiments will examine how microgravity affects the rodents, providing information relevant to human spaceflight , discoveries in basic biology, and... | https://en.wikipedia.org/wiki/Rodent_Research_Hardware_System |
Rodenticides are chemicals made and sold for the purpose of killing rodents . While commonly referred to as " rat poison ", rodenticides are also used to kill mice , woodchucks , chipmunks , porcupines , nutria , beavers , [ 1 ] and voles . [ 2 ]
Some rodenticides are lethal after one exposure while others require mor... | https://en.wikipedia.org/wiki/Rodenticide |
In the theory of three-dimensional rotation , Rodrigues' rotation formula , named after Olinde Rodrigues , is an efficient algorithm for rotating a vector in space, given an axis and angle of rotation . By extension, this can be used to transform all three basis vectors to compute a rotation matrix in SO(3) , the group... | https://en.wikipedia.org/wiki/Rodrigues'_rotation_formula |
The Roe approximate Riemann solver , devised by Phil Roe , is an approximate Riemann solver based on the Godunov scheme and involves finding an estimate for the intercell numerical flux or Godunov flux F i + 1 2 {\displaystyle F_{i+{\frac {1}{2}}}} at the interface between two computational cells U i {\displaystyle U_{... | https://en.wikipedia.org/wiki/Roe_solver |
The Roemer model of political competition is a game between political parties in which each party announces a multidimensional policy vector . Since Nash equilibria do not normally exist when the policy space is multidimensional, John Roemer introduced the concept of party-unanimity Nash equilibrium (PUNE), which can ... | https://en.wikipedia.org/wiki/Roemer_model_of_political_competition |
The roentgen equivalent man ( rem ) [ 1 ] [ 2 ] is a CGS unit of equivalent dose , effective dose , and committed dose , which are dose measures used to estimate potential health effects of low levels of ionizing radiation on the human body.
Quantities measured in rem are designed to represent the stochastic biologica... | https://en.wikipedia.org/wiki/Roentgen_equivalent_man |
Roger Harquail French is a materials scientist, engineer, academic and author. He is the Kyocera Professor in the Case School of Engineering at Case Western Reserve University (CWRU) . [ 1 ]
French's research interests at CWRU span optical properties and electronic structure, degradation science of materials in outdoo... | https://en.wikipedia.org/wiki/Roger_H._French |
Charles Roger Slack FRS FRSNZ (22 April 1937 – 24 October 2016) was a British-born plant biologist and biochemist who lived and worked in Australia (1962–1970) and New Zealand (1970–2000). In 1966, jointly with Marshall Hatch , he discovered C4 photosynthesis (also known as the Hatch Slack Pathway).
Slack was born on ... | https://en.wikipedia.org/wiki/Roger_Slack |
The Rogers–Ramanujan continued fraction is a continued fraction discovered by Rogers (1894) and independently by Srinivasa Ramanujan , and closely related to the Rogers–Ramanujan identities . It can be evaluated explicitly for a broad class of values of its argument.
Given the functions G ( q ) {\displaystyle G(q)} an... | https://en.wikipedia.org/wiki/Rogers–Ramanujan_continued_fraction |
In mathematics , the Rogers–Ramanujan identities are two identities related to basic hypergeometric series and integer partitions . The identities were first discovered and proved by Leonard James Rogers ( 1894 ), and were subsequently rediscovered (without a proof) by Srinivasa Ramanujan some time before 1913. Ramanu... | https://en.wikipedia.org/wiki/Rogers–Ramanujan_identities |
A rogue access point is a wireless access point that has been installed on a secure network without explicit authorization from a local network administrator, [ 1 ] whether added by a well-meaning employee or by a malicious attacker.
Although it is technically easy for a well-meaning employee to install a " soft acces... | https://en.wikipedia.org/wiki/Rogue_access_point |
Rogue waves (also known as freak waves or killer waves ) are large and unpredictable surface waves that can be extremely dangerous to ships and isolated structures such as lighthouses . [ 1 ] They are distinct from tsunamis , which are long wavelength waves, often almost unnoticeable in deep waters and are caused by th... | https://en.wikipedia.org/wiki/Rogue_wave |
Rohri Canal is a major irrigation canal in Sindh , Pakistan . [ 1 ] It is a vital source of water for agriculture in the region. [ 2 ] It originates from the left bank of the Indus River at the Sukkur Barrage , located in Sukkur District , Sindh . [ 3 ] It traverses through several districts, providing irrigation to va... | https://en.wikipedia.org/wiki/Rohri_Canal |
Roid rage (also known as steroid rage [ 5 ] ) is a side effect of the use of anabolic steroids which is described as dramatic mood swings , increased feelings of hostility, impaired judgment, and increased levels of aggression . [ 6 ] The term "roid rage" became popular in the 1980s. [ 7 ]
After supraphysiological use... | https://en.wikipedia.org/wiki/Roid_rage |
Roivant Sciences Ltd. is an American multinational healthcare company focused on applying technology to drug development and building subsidiary life sciences and health technology companies. It was founded in 2014 by Vivek Ramaswamy and is currently headed by CEO Matt Gline. [ 3 ] Roivant maintains its headquarters in... | https://en.wikipedia.org/wiki/Roivant_Sciences |
In 4-dimensional topology, a branch of mathematics, Rokhlin's theorem states that if a smooth , orientable, closed 4- manifold M has a spin structure (or, equivalently, the second Stiefel–Whitney class w 2 ( M ) {\displaystyle w_{2}(M)} vanishes), then the signature of its intersection form , a quadratic form on the se... | https://en.wikipedia.org/wiki/Rokhlin's_theorem |
Roku ( / ˈ r oʊ k uː / ⓘ ROH -koo ) is a brand of consumer electronics that includes streaming players , smart TVs (and their operating systems), as well as a free TV streaming service . The brand is owned by Roku, Inc. , an American company.
As of 2024, Roku is the U.S. market leader in streaming video distribution ,... | https://en.wikipedia.org/wiki/Roku |
Rokushō ( 緑青 ) is a traditional Japanese chemical compound used in the niiro process for artificially inducing patination in decorative non-ferrous metals, especially several copper alloys, with the results being metals of the irogane class. It is most commonly translated as malachite ; in art, rokushō was the most wid... | https://en.wikipedia.org/wiki/Rokushō |
Roland Jazz Chorus is the name given to a series of solid-state instrument amplifiers produced by the Roland Corporation in Japan since 1975. Its name comes from its built-in analog chorus effect . The Jazz Chorus series became increasingly popular in the late 1970s and early 1980s new wave and post-punk scenes because... | https://en.wikipedia.org/wiki/Roland_Jazz_Chorus |
Rolanet (Robotron Local Area Network) was a networking standard, developed in the former German Democratic Republic (GDR) and introduced in 1987 by the computer manufacturer Robotron . It enabled computer networking over coax cable and glass fiber with a range of 1,000 metres (3,300 ft). Networking speed was 500 kBd , ... | https://en.wikipedia.org/wiki/Rolanet |
Roll20 is a website consisting of a set of tools for playing tabletop role-playing games , also referred to as a virtual tabletop , which can be used as an aid to playing in-person or remotely online. The site was launched in 2012 after a successful Kickstarter campaign. The platform's goal is to provide an authentic t... | https://en.wikipedia.org/wiki/Roll20 |
The roll center of a vehicle is the notional point at which the cornering forces in the suspension are reacted to the vehicle body.
There are two definitions of roll center. The most commonly used is the geometric (or kinematic) roll center, whereas the Society of Automotive Engineers uses a force -based definition. [... | https://en.wikipedia.org/wiki/Roll_center |
Roll moment is a moment , which is a product of a force and a distance, that tends to cause a vehicle to roll, that is to rotate about its longitudinal axis. [ 1 ]
In vehicle dynamics , the roll moment can be calculated as the product of three quantities:
In two-axle vehicles, such as cars and some trucks, the roll a... | https://en.wikipedia.org/wiki/Roll_moment |
In calculus , Rolle's theorem or Rolle's lemma essentially states that any real-valued differentiable function that attains equal values at two distinct points must have at least one point, somewhere between them, at which the slope of the tangent line is zero. Such a point is known as a stationary point . It is a poin... | https://en.wikipedia.org/wiki/Rolle's_theorem |
A roller-cone bit is a drill bit used for drilling through rock that features 2 or 3 abrasive, spinning cones that break up rock and sediment as they grind against it. Roller-cone bits are typically used when drilling for oil and gas . [ 1 ] A water jet flowing through the bit washes out the rock in a slurry. [ 2 ]
Th... | https://en.wikipedia.org/wiki/Roller_cone_bit |
A roller dam is a type of hydro -control device specially designed to mitigate erosion . They are most often used to divert water for irrigation but the largest and most notable examples are used to ease river navigation . The world's first roller dam ( German : walzenwehr ) was constructed in Schweinfurt , Germany in... | https://en.wikipedia.org/wiki/Roller_dam |
Roller Electrospinning system a method for producing nanofibres was developed by Jirsak et al. . [ 1 ] This method is known under the name Nanospider from Elmarco Company in Liberec. Roller electrospinning is the unique method which has been used in industry to produce nanofibers continuously.
Nanospider consists of ro... | https://en.wikipedia.org/wiki/Roller_electrospinning |
Roller mills are mills that use cylindrical rollers, either in opposing pairs or against flat plates, to crush or grind various materials, such as grain , ore , gravel , plastic , and others. Roller grain mills are an alternative to traditional millstone arrangements in gristmills . Roller mills for rock complement oth... | https://en.wikipedia.org/wiki/Roller_mill |
In mechanical engineering , a rolling-element bearing , also known as a rolling bearing , [ 1 ] is a bearing which carries a load by placing rolling elements (such as balls, cylinders, or cones) between two concentric, grooved rings called races . The relative motion of the races causes the rolling elements to roll wit... | https://en.wikipedia.org/wiki/Rolling-element_bearing |
Rolling bed dryer s are used for efficiently processing large amounts of material that need their respective moisture levels reduced. Rolling bed dryers are most often used for drying wood chips and organic residues and are most often utilized in the biomass , waste/ recycling , wood particle board , pellet , and biofu... | https://en.wikipedia.org/wiki/Rolling_bed_dryer |
A rolling code (or sometimes called a hopping code ) is used in keyless entry systems to prevent a simple form of replay attack , where an eavesdropper records the transmission and replays it at a later time to cause the receiver to 'unlock'. Such systems are typical in garage door openers and keyless car entry systems... | https://en.wikipedia.org/wiki/Rolling_code |
Rolling Contact Fatigue ( RCF ) is a phenomenon that occurs in mechanical components relating to rolling/sliding contact, such as railways, gears , and bearings . [ 2 ] It is the result of the process of fatigue due to rolling/sliding contact. [ 2 ] [ 3 ] The RCF process begins with cyclic loading of the material, whic... | https://en.wikipedia.org/wiki/Rolling_contact_fatigue |
Rolling hairpin replication ( RHR ) is a unidirectional, strand displacement form of DNA replication used by parvoviruses, a group of viruses that constitute the family Parvoviridae . Parvoviruses have linear, single-stranded DNA (ssDNA) genomes in which the coding portion of the genome is flanked by telomeres at each ... | https://en.wikipedia.org/wiki/Rolling_hairpin_replication |
Rolling resistance , sometimes called rolling friction or rolling drag , is the force resisting the motion when a body (such as a ball , tire , or wheel ) rolls on a surface. It is mainly caused by non-elastic effects; that is, not all the energy needed for deformation (or movement) of the wheel, roadbed, etc., is reco... | https://en.wikipedia.org/wiki/Rolling_resistance |
A rollout is an analysis technique for backgammon positions and moves. A rollout consists of playing the same position many times (with different dice rolls) and recording the results. The balance of wins and losses is used to evaluate the equity of the position. Historically this was done by hand, but it is now undert... | https://en.wikipedia.org/wiki/Rollout_(backgammon) |
Rollover (also known as flameover ) is a stage of a structure fire when fire gases in a room or other enclosed area ignite. [ 1 ] Since heated gases, the product of pyrolysis , rise to the ceiling, this is where a rollover phenomenon is most often witnessed. Visually, this may be seen as flames "rolling" across the ce... | https://en.wikipedia.org/wiki/Rollover_(fire) |
Horace Romano " Rom " Harré ( / ˈ h æ r eɪ / ; [ 2 ] 18 December 1927 – 17 October 2019) [ 3 ] [ 4 ] was a New Zealand-British philosopher and psychologist .
Harré was born in Āpiti , in northern Manawatu , near Palmerston North , New Zealand, [ 5 ] but held British citizenship . [ 6 ] He studied chemical engineering ... | https://en.wikipedia.org/wiki/Rom_Harré |
A Roma wall or Gypsy wall is a wall built by local authorities in the Czech Republic , Romania and Slovakia to segregate the Roma minority from the rest of the population. Such practices have been criticised by both human rights organizations and the European Union, who see it as a case of racial segregation. [ 1 ]
A ... | https://en.wikipedia.org/wiki/Roma_wall |
Etruscans control Italy.
Carthaginian occupation of parts of Sardinia and Sicily .
Etruria becomes part of Rome.
Punic Wars .
Iberia becomes a Roman province.
Athens becomes a Roman province.
Carthage becomes a Roman province.
Asia Minor becomes a Roman province.
Egypt becomes a Roman province.
Britannia becom... | https://en.wikipedia.org/wiki/Roman_metallurgy |
Roman military engineering was of a scale and frequency far beyond that of its contemporaries. Indeed, military engineering was in many ways endemic in Roman military culture, as demonstrated by each Roman legionary having as part of his equipment a shovel, alongside his gladius (sword) and pila ( javelins ).
Workers,... | https://en.wikipedia.org/wiki/Roman_military_engineering |
In mathematics, specifically additive number theory , Romanov's theorem is a mathematical theorem proved by Nikolai Pavlovich Romanov. It states that given a fixed base b , the set of numbers that are the sum of a prime and a positive integer power of b has a positive lower asymptotic density .
Romanov initially state... | https://en.wikipedia.org/wiki/Romanov's_theorem |
In mathematics , the Romanovski polynomials are one of three finite subsets of real orthogonal polynomials discovered by Vsevolod Romanovsky [ 1 ] (Romanovski in French transcription) within the context of probability distribution functions in statistics. They form an orthogonal subset of a more general family of littl... | https://en.wikipedia.org/wiki/Romanovski_polynomials |
Romen Efimovich Sova ( Russian : Ромен Ефимович Сова ) (5 November 1938 - 22 December 2001), was a Soviet and Ukrainian toxicologist . Corresponding Member of the Ukrainian Ecological Academy of Sciences, Doctor of Medical Sciences.
From 1965 — Associate Research Fellow of the Kiev Institute of Hygiene and Occupationa... | https://en.wikipedia.org/wiki/Romen_Sova |
A ROMER Arm is a term for a portable coordinate measuring machine ROMER, a company Acquired by the Hexagon AB group, and part of the Manufacturing Intelligence division, designed the ROMER arm in the 1980s to solve the problem of how to measure large objects such as airplanes and car bodies without moving them to a ded... | https://en.wikipedia.org/wiki/Romer_arm |
Romulus , Remus , and Khaleesi are genetically modified gray wolves ( Canis lupus ) created by Colossal Biosciences Inc. with the goal of replicating the phenotype of the extinct dire wolf ( Aenocyon dirus ). Romulus and Remus were born on October 1, 2024; Colossal claims that the two males represent the first living e... | https://en.wikipedia.org/wiki/Romulus,_Remus,_and_Khaleesi |
Ronald Rivera (August 22, 1948 – September 3, 2008) was an American activist of Puerto Rican descent who is best known for promoting an inexpensive ceramic water filter developed in Guatemala by the chemist Fernando Mazariegos and used to treat gray water in impoverished communities and for establishing community-based... | https://en.wikipedia.org/wiki/Ron_Rivera_(public_health) |
Ronald James Gillespie , CM FRSC FRS [ 1 ] (August 21, 1924 – February 26, 2021) [ 2 ] was a British chemist specializing in the field of molecular geometry , who arrived in Canada after accepting an offer that included his own laboratory with new equipment, which post-World War II Britain could not provide. He was res... | https://en.wikipedia.org/wiki/Ronald_Gillespie |
Leading Aircraftman Ronald George Maddison (23 January 1933 – 6 May 1953) was a twenty-year-old Royal Air Force mechanic who was unlawfully killed as the result of exposure to nerve agents while acting as a voluntary test subject at Porton Down , in Wiltshire , England. After substantial controversy, his death was the ... | https://en.wikipedia.org/wiki/Ronald_Maddison |
Sir Ronald Sydney Nyholm (29 January 1917 – 4 December 1971) was an Australian chemist who was a leading figure in inorganic chemistry in the 1950s and 1960s.
Born on 29 January 1917 as the fourth in a family of six children. Nyholm's father, Eric Edward Nyholm (1878–1932) was a railway guard. [ citation needed ] Nyho... | https://en.wikipedia.org/wiki/Ronald_Sydney_Nyholm |
Ronald Wayne " Ron " Davis (born July 17, 1941) is professor of biochemistry and genetics , and director of the Stanford Genome Technology Center at Stanford University . [ 4 ] Davis is a researcher in biotechnology and molecular genetics, particularly active in human and yeast genomics and the development of new techn... | https://en.wikipedia.org/wiki/Ronald_W._Davis |
Ronchigram (after Italian physicist Vasco Ronchi [ˈroŋki] [ 1 ] [ 2 ] ) is the convergent beam diffraction pattern [ 3 ] of a known object with features comparable to the diffracting wavelength. In the case of electron Ronchigrams amorphous materials are used. The structure of the Ronchigram encodes information about t... | https://en.wikipedia.org/wiki/Ronchigram |
Rongalite is a chemical compound with the molecular formula Na + HOCH 2 SO 2 − . This salt has many additional names, including Rongalit , sodium hydroxymethylsulfinate , sodium formaldehyde sulfoxylate , and Bruggolite . It is listed in the European Cosmetics Directive as sodium oxymethylene sulfoxylate ( INCI ). It... | https://en.wikipedia.org/wiki/Rongalite |
Roof pitch is the steepness of a roof expressed as a ratio of inch(es) rise per horizontal foot (or their metric equivalent), or as the angle in degrees its surface deviates from the horizontal. A flat roof has a pitch of zero in either instance; all other roofs are pitched .
The pitch of a roof is expressed as a fra... | https://en.wikipedia.org/wiki/Roof_pitch |
A roof seamer is a portable roll forming machine that is used to install mechanically seamed structural standing-seam metal roof panels, as part of an overall metal construction building envelope system. The machine is small and portable to be handled by an operator on top of a roof. The machine is applied to the overl... | https://en.wikipedia.org/wiki/Roof_seamer |
A roofing filter is a type of filter used in a HF radio receiver that limits the passband in the early stages of the receiver electronics. It blocks strong signals outside the receive channel which can overload following amplifier and mixer stages.
The roofing filter is usually found after the first receiver mixer (wh... | https://en.wikipedia.org/wiki/Roofing_filter |
Rooibos ( / ˈ r ɔɪ b ɒ s / ROY -boss ; Afrikaans: [ˈroːibɔs] ⓘ , lit. ' red bush ' ), or Aspalathus linearis , is a broom -like member of the plant family Fabaceae that grows in South Africa 's Fynbos biome. The leaves are used to make a caffeine -free herbal infusion that has been popular in Southern Africa for genera... | https://en.wikipedia.org/wiki/Rooibos |
In combinatorial mathematics , a rook polynomial is a generating polynomial of the number of ways to place non-attacking rooks on a board that looks like a checkerboard ; that is, no two rooks may be in the same row or column. The board is any subset of the squares of a rectangular board with m rows and n columns; we ... | https://en.wikipedia.org/wiki/Rook_polynomial |
The room-temperature densification method was developed for Li 2 MoO 4 ceramics and is based on the water-solubility of Li 2 MoO 4 . It can be used for the fabrication of Li 2 MoO 4 ceramics instead of conventional thermal sintering . The method utilizes a small amount of aqueous phase formed by moistening the Li 2 MoO... | https://en.wikipedia.org/wiki/Room-temperature_densification_method |
A room-temperature superconductor is a hypothetical material capable of displaying superconductivity above 0 °C (273 K; 32 °F), operating temperatures which are commonly encountered in everyday settings. As of 2023, the material with the highest accepted superconducting temperature was highly pressurized lanthanum deca... | https://en.wikipedia.org/wiki/Room-temperature_superconductor |
Room acoustics is a subfield of acoustics dealing with the behaviour of sound in enclosed or partially-enclosed spaces. The architectural details of a room influences the behaviour of sound waves within it, with the effects varying by frequency . Acoustic reflection , diffraction , and diffusion can combine to create a... | https://en.wikipedia.org/wiki/Room_acoustics |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.