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Phase retrieval is the process of algorithmically finding solutions to the phase problem . Given a complex spectrum F ( k ) {\displaystyle F(k)} , of amplitude | F ( k ) | {\displaystyle |F(k)|} , and phase ψ ( k ) {\displaystyle \psi (k)} :
where x is an M -dimensional spatial coordinate and k is an M -dimensional sp... | https://en.wikipedia.org/wiki/Phase_retrieval |
In thermodynamics , the phase rule is a general principle governing multi-component, multi-phase systems in thermodynamic equilibrium . For a system without chemical reactions , it relates the number of freely varying intensive properties ( F ) to the number of components ( C ), the number of phases ( P ), and number o... | https://en.wikipedia.org/wiki/Phase_rule |
Phase separation is the creation of two distinct phases from a single homogeneous mixture . [ 1 ] The most common type of phase separation is between two immiscible liquids, such as oil and water. This type of phase separation is known as liquid-liquid equilibrium. Colloids are formed by phase separation, though not al... | https://en.wikipedia.org/wiki/Phase_separation |
Phase shift torque measurement involves the use of a shaft, which is either an integral part of the rotating machine under test - such as a turbine , compressor , or jet engine - or positioned between the machine and a dynamometer . The shaft has a pair of identical toothed disks attached at each end and often has a sl... | https://en.wikipedia.org/wiki/Phase_shift_torque_measurement |
The phase space of a physical system is the set of all possible physical states of the system when described by a given parameterization. Each possible state corresponds uniquely to a point in the phase space. For mechanical systems , the phase space usually consists of all possible values of the position and momentum ... | https://en.wikipedia.org/wiki/Phase_space |
Phase space crystal is the state of a physical system that displays discrete symmetry in phase space instead of real space . For a single-particle system, the phase space crystal state refers to the eigenstate of the Hamiltonian for a closed quantum system [ 1 ] or the eigenoperator of the Liouvillian for an open quant... | https://en.wikipedia.org/wiki/Phase_space_crystal |
In applied mathematics , the phase space method is a technique for constructing and analyzing solutions of dynamical systems , that is, solving time-dependent differential equations .
The method consists of first rewriting the equations as a system of differential equations that are first-order in time, by introducing... | https://en.wikipedia.org/wiki/Phase_space_method |
Phase stretch transform ( PST ) is a computational approach to signal and image processing. One of its utilities is for feature detection and classification. [ 1 ] [ 2 ] PST is related to time stretch dispersive Fourier transform . [ 3 ] It transforms the image by emulating propagation through a diffractive medium with... | https://en.wikipedia.org/wiki/Phase_stretch_transform |
A phase telescope or Bertrand lens is an optical device used in aligning the various optical components of a light microscope . In particular it allows observation of the back focal plane of the objective lens and its conjugated focal planes. The phase telescope/Bertrand lens is inserted into the microscope in place of... | https://en.wikipedia.org/wiki/Phase_telescope |
Phase transformation crystallography describes the orientation relationship and interface orientation after a phase transformation (such as martensitic transformation or precipitation) .
This crystallography -related article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Phase_transformation_crystallography |
In physics , chemistry , and other related fields like biology, a phase transition (or phase change ) is the physical process of transition between one state of a medium and another. Commonly the term is used to refer to changes among the basic states of matter : solid , liquid , and gas , and in rare cases, plasma . A... | https://en.wikipedia.org/wiki/Phase_transition |
In biology , phase variation is a method for dealing with rapidly varying environments without requiring random mutation. It involves the variation of protein expression, frequently in an on-off fashion, within different parts of a bacterial population. As such the phenotype can switch at frequencies that are much high... | https://en.wikipedia.org/wiki/Phase_variation |
Phased adoption or phased implementation is a strategy of implementing an innovation (i.e., information systems , new technologies, processes, etc.) in an organization in a phased way, so that different parts of the organization are implemented in different subsequent time slots. Phased implementation is a method of sy... | https://en.wikipedia.org/wiki/Phased_adoption |
In antenna theory, a phased array usually means an electronically scanned array , a computer-controlled array of antennas which creates a beam of radio waves that can be electronically steered to point in different directions without moving the antennas. [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] [ 6 ]
In a phased array, the power... | https://en.wikipedia.org/wiki/Phased_array |
The phases of clinical research are the stages in which scientists conduct experiments with a health intervention to obtain sufficient evidence for a process considered effective as a medical treatment . [ 1 ] For drug development , the clinical phases start with testing for drug safety in a few human subjects , then e... | https://en.wikipedia.org/wiki/Phases_of_clinical_research |
Fluorine forms diatomic molecules ( F 2 ) that are gaseous at room temperature with a density about 1.3 times that of air. [ 1 ] [ note 1 ] Though sometimes cited as yellow-green, pure fluorine gas is actually a very pale yellow. The color can only be observed in concentrated fluorine gas when looking down the axis of ... | https://en.wikipedia.org/wiki/Phases_of_fluorine |
In bacteria , phasevarions (also known as phase variable regulons ) mediate a coordinated change in the expression of multiple genes or proteins . [ 1 ] This occurs via phase variation of a single DNA methyltransferase . Phase variation of methyltransferase expression results in differential methylation throughout the ... | https://en.wikipedia.org/wiki/Phasevarion |
In physics, a phason is a form of collective excitation found in aperiodic crystal structures . Phasons are a type of quasiparticle : an emergent phenomenon of many-particle systems. The phason can also be seen as a degree of freedom unique to quasicrystals. Similar to phonons , phasons are quasiparticles associated wi... | https://en.wikipedia.org/wiki/Phason |
A phasor is a network of capacitors and variable inductors used to adjust the relative amplitude and phase of the current being distributed to each tower in a directional array. A typical phasor has separate controls to adjust the phase of the current going to each tower, adjustable power divider controls, and a common... | https://en.wikipedia.org/wiki/Phasor_(radio_broadcasting) |
Phasor approach refers to a method which is used for vectorial representation of sinusoidal waves like alternating currents and voltages or electromagnetic waves . The amplitude and the phase of the waveform is transformed into a vector where the phase is translated to the angle between the phasor vector and X-axis and... | https://en.wikipedia.org/wiki/Phasor_approach_to_fluorescence_lifetime_and_spectral_imaging |
A phene is an individual genetically determined characteristic or trait which can be possessed by an organism , such as eye colour, height, behavior, tooth shape or any other observable characteristic.
The term 'phene' was evidently coined as an obvious parallel construct to 'gene'. Phene is to Phenotype as Gene is t... | https://en.wikipedia.org/wiki/Phene |
In biology , phenetics ( / f ɪ ˈ n ɛ t ɪ k s / ; from Ancient Greek φαίνειν (phainein) ' to appear ' ), also known as taximetrics , is an attempt to classify organisms based on overall similarity, usually with respect to morphology or other observable traits, regardless of their phylogeny or evolutionary relation. It i... | https://en.wikipedia.org/wiki/Phenetics |
The Phenice method is a technique of determining the sex of a human skeleton from the innominate pelvis. In the procedure, sex is determined based on three features: the ventral arc, the subpubic concavity, and the medial aspect of the ischio-pubic ramus. As a non-metric absolute method, it relies on the recognition of... | https://en.wikipedia.org/wiki/Phenice_method |
In phenomics , a phenocopy is a variation in phenotype (generally referring to a single trait ) which is caused by environmental conditions (often, but not necessarily, during the organism's development ), such that the organism's phenotype matches a phenotype which is determined by genetic factors. It is not a type of... | https://en.wikipedia.org/wiki/Phenocopy |
Phenol extraction is a laboratory technique that purifies nucleic acid samples using a phenol solution. Phenol is common reagent in extraction because its properties allow for effective nucleic acid extraction, particularly as it strongly denatures proteins, it is a nucleic acid preservative, and it is immiscible in wa... | https://en.wikipedia.org/wiki/Phenol_extraction |
Phenol red (also known as phenolsulfonphthalein or PSP ) is a pH indicator frequently used in cell biology laboratories.
Phenol red exists as a red crystal that is stable in air. Its solubility is 0.77 grams per liter (g/L) in water and 2.9 g/L in ethanol . [ 1 ] It is a weak acid with p K a = 8.00 at 20 °C (68 °F).
... | https://en.wikipedia.org/wiki/Phenol_red |
Phenology is the study of periodic events in biological life cycles and how these are influenced by seasonal and interannual variations in climate , as well as habitat factors (such as elevation ). [ 1 ]
Examples include the date of emergence of leaves and flowers, the first flight of butterflies, the first appearance... | https://en.wikipedia.org/wiki/Phenology |
Phenolphthalein ( / f ɛ ˈ n ɒ l ( f ) θ ə l iː n / [ citation needed ] feh- NOL(F) -thə-leen ) is a chemical compound with the formula C 20 H 14 O 4 and is often written as " HIn ", " HPh ", " phph " or simply " Ph " in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations . For this... | https://en.wikipedia.org/wiki/Phenolphthalein |
In organic chemistry , phenols , sometimes called phenolics , are a class of chemical compounds consisting of one or more hydroxyl groups (− O H ) bonded directly to an aromatic hydrocarbon group. [ 1 ] The simplest is phenol , C 6 H 5 OH . Phenolic compounds are classified as simple phenols or polyphenols based on the... | https://en.wikipedia.org/wiki/Phenols |
Phenol–chloroform extraction is a liquid-liquid extraction technique in molecular biology used to separate nucleic acids from proteins and lipids . [ 1 ]
Aqueous samples, lysed cells, or homogenised tissue are mixed with equal volumes of a phenol : chloroform mixture. This mixture is then centrifuged. Because the phen... | https://en.wikipedia.org/wiki/Phenol–chloroform_extraction |
In genetics , the phenotype (from Ancient Greek φαίνω ( phaínō ) ' to appear, show ' and τύπος ( túpos ) ' mark, type ' ) is the set of observable characteristics or traits of an organism . [ 1 ] [ 2 ] The term covers the organism's morphology (physical form and structure), its developmental processes, its biochemical ... | https://en.wikipedia.org/wiki/Phenome |
A phenomenological model is a scientific model that describes the empirical relationship of phenomena to each other, in a way which is consistent with fundamental theory, but is not directly derived from theory. In other words, a phenomenological model is not derived from first principles . A phenomenological model for... | https://en.wikipedia.org/wiki/Phenomenological_model |
Phenomenological quantum gravity is the research field that deals with the phenomenology of quantum gravity . The relevance of this research area derives from the fact that none of the candidate theories for quantum gravity has yielded experimentally testable predictions. [ 1 ] Phenomenological models are designed to b... | https://en.wikipedia.org/wiki/Phenomenological_quantum_gravity |
In physics , phenomenology is the application of theoretical physics to experimental data by making quantitative predictions based upon known theories. It is related to the philosophical notion of the same name in that these predictions describe anticipated behaviors for the phenomena in reality. Phenomenology stands i... | https://en.wikipedia.org/wiki/Phenomenology_(physics) |
Phenomics is the systematic study of traits that make up an organisms phenotype , [ 1 ] [ 2 ] which changes over time, due to development and aging or through metamorphosis such as when a caterpillar changes into a butterfly. The term "phenomics" was coined by scientist Steven A. Garan, working at UC Berkeley and LBNL ... | https://en.wikipedia.org/wiki/Phenomics |
Phenoptosis (from pheno : showing or demonstrating; ptosis : programmed death, "falling off") is a conception of the self-programmed death of an organism proposed by Vladimir Skulachev in 1999.
In many species, including salmon and marsupial mice, under certain circumstances, especially following reproduction, an orga... | https://en.wikipedia.org/wiki/Phenoptosis |
Phenothrin , also called sumithrin and d-phenothrin , [ 2 ] is a synthetic pyrethroid that kills adult fleas and ticks . It has also been used to kill head lice in humans. d-Phenothrin is used as a component of aerosol insecticides for domestic use. It is often used with methoprene , an insect growth regulator that int... | https://en.wikipedia.org/wiki/Phenothrin |
The phenotype microarray approach is a technology for high-throughput phenotyping of cells.
A phenotype microarray system enables one to monitor simultaneously the phenotypic reaction of cells to environmental challenges or exogenous compounds in a high-throughput manner.
The phenotypic reactions are recorded as eithe... | https://en.wikipedia.org/wiki/Phenotype_microarray |
Phenotype modification is the process of experimentally altering an organism's phenotype to investigate the impact of phenotype on the fitness. [ 1 ]
Phenotype modification has been used to assess the impact of parasite mechanical presence on fish host behaviour. [ 2 ]
This genetics article is a stub . You can help W... | https://en.wikipedia.org/wiki/Phenotype_modification |
Phenotypic disparity , also known as morphological diversity , morphological variety , morphological disparity , morphodisparity or simply disparity , refers to the variation of observable characteristics within biological groups. It was originally proposed in paleontology , and has also been introduced into the study ... | https://en.wikipedia.org/wiki/Phenotypic_disparity |
Phenotypic integration is a metric for measuring the correlation of multiple functionally-related traits to each other. [ 1 ] Complex phenotypes often require multiple traits working together in order to function properly. Phenotypic integration is significant because it provides an explanation as to how phenotypes are... | https://en.wikipedia.org/wiki/Phenotypic_integration |
Phenotypic plasticity refers to some of the changes in an organism 's behavior, morphology and physiology in response to a unique environment. [ 1 ] [ 2 ] Fundamental to the way in which organisms cope with environmental variation, phenotypic plasticity encompasses all types of environmentally induced changes (e.g. mor... | https://en.wikipedia.org/wiki/Phenotypic_plasticity |
Phenotypic response surfaces (PRS) is an artificial intelligence -guided personalized medicine platform that relies on combinatorial optimization principles to quantify drug interactions and efficacies to develop optimized combination therapies to treat a broad spectrum of illnesses.
Phenotypic response surfaces fit a... | https://en.wikipedia.org/wiki/Phenotypic_response_surfaces |
Phenotypic screening is a type of screening used in biological research and drug discovery to identify substances such as small molecules , peptides , or RNAi that alter the phenotype of a cell or an organism in a desired manner. [ 1 ] Phenotypic screening must be followed up with identification (sometimes referred to ... | https://en.wikipedia.org/wiki/Phenotypic_screening |
Phenotypic switching is switching between multiple cellular morphologies. David R. Soll described two such systems: the first high frequency switching system between several morphological stages and a second high frequency switching system between opaque and white cells. The latter is an epigenetic switching system [ ... | https://en.wikipedia.org/wiki/Phenotypic_switching |
In microbiology , the phenotypic testing of mycobacteria uses a number of methods. The most-commonly used phenotypic tests to identify and distinguish Mycobacterium strains and species from each other are described below.
Media : KH 2 PO 4 (0.5 g), MgSO> 4 *7H 2 0 (0.5 g), purified agar (20 g), distilled water (1000 m... | https://en.wikipedia.org/wiki/Phenotypic_testing_of_mycobacteria |
Phenoxymethylpenicillin , also known as penicillin V ( PcV ) and penicillin VK , is an antibiotic useful for the treatment of a number of bacterial infections . [ 2 ] Specifically it is used for the treatment of strep throat , otitis media , and cellulitis . [ 2 ] It is also used to prevent rheumatic fever and to preve... | https://en.wikipedia.org/wiki/Phenoxymethylpenicillin |
The enzyme phenylalanine racemase ( EC 5.1.1.11 , phenylalanine racemase , phenylalanine racemase (adenosine triphosphate-hydrolysing) , gramicidin S synthetase I ) is the enzyme that acts on amino acids and derivatives. It activates both the L & D stereo isomers of phenylalanine to form L-phenylalanyl adenylate and D-... | https://en.wikipedia.org/wiki/Phenylalanine_racemase_(ATP-hydrolysing) |
Phenylboronic acid or benzeneboronic acid , abbreviated as PhB(OH) 2 where Ph is the phenyl group C 6 H 5 - and B(OH) 2 is a boronic acid containing a phenyl substituent and two hydroxyl groups attached to boron . Phenylboronic acid is a white powder and is commonly used in organic synthesis . Boronic acids are mild Le... | https://en.wikipedia.org/wiki/Phenylboronic_acid |
The biosynthesis of phenylpropanoids involves a number of enzymes.
In plants, all phenylpropanoids are derived from the amino acids phenylalanine and tyrosine .
Phenylalanine ammonia-lyase (PAL, a.k.a. phenylalanine/tyrosine ammonia-lyase) is an enzyme that transforms L- phenylalanine and tyrosine into trans- cinnami... | https://en.wikipedia.org/wiki/Phenylpropanoids_metabolism |
Phenylpropanolamine ( PPA ), sold under many brand names, is a sympathomimetic agent used as a decongestant and appetite suppressant . [ 9 ] [ 1 ] [ 10 ] [ 11 ] It was once common in prescription and over-the-counter cough and cold preparations . The medication is taken orally . [ 4 ] [ 12 ]
Side effects of phenylprop... | https://en.wikipedia.org/wiki/Phenylpropanolamine |
1-Phenyl-2-propylaminopentane ( PPAP ), also known as α, N -dipropylphenethylamine ( DPPEA ) and by the developmental code name MK-306 , is an experimental drug related to selegiline which acts as a catecholaminergic activity enhancer (CAE). [ 1 ] [ 2 ] [ 3 ] [ 4 ]
PPAP is a CAE and enhances the nerve impulse propagat... | https://en.wikipedia.org/wiki/Phenylpropylaminopentane |
Phenytoin ( PHT ), sold under the brand name Dilantin among others, [ 1 ] is an anti-seizure medication . [ 3 ] It is useful for the prevention of tonic-clonic seizures (also known as grand mal seizures) and focal seizures , but not absence seizures . [ 3 ] The intravenous form, fosphenytoin , is used for status epilep... | https://en.wikipedia.org/wiki/Phenytoin |
Pheophorbide or phaeophorbide is a product of chlorophyll breakdown and a derivative of pheophytin where both the central magnesium has been removed and the phytol tail has been hydrolyzed . It is used as a photosensitizer in photodynamic therapy . [ 1 ]
Pheophorbide may be generated by digestion of ingested plant mat... | https://en.wikipedia.org/wiki/Pheophorbide |
Pherecydes of Syros ( / f ə ˈ r ɛ s ɪ ˌ d iː z / ; Ancient Greek : Φερεκύδης ὁ Σύριος ; fl. 6th century BCE) was an Ancient Greek mythographer and proto- philosopher from the island of Syros . Little is known about his life and death. Some ancient testimonies counted Pherecydes among the Seven Sages of Greece , althoug... | https://en.wikipedia.org/wiki/Pherecydes_of_Syros |
A pheromone (from Ancient Greek φέρω ( phérō ) ' to bear ' and hormone ) is a secreted or excreted chemical factor [ jargon ] that triggers a social response in members of the same species . Pheromones are chemicals capable of acting like hormones outside the body of the secreting individual, to affect the behavior of ... | https://en.wikipedia.org/wiki/Pheromone |
A pheromone trap is a type of insect trap that uses pheromones to lure insects . Sex pheromones and aggregating pheromones are the most common types used. A pheromone-impregnated lure is encased in a conventional trap such as a bottle trap , delta trap, water-pan trap , or funnel trap. Pheromone traps are used both to ... | https://en.wikipedia.org/wiki/Pheromone_trap |
A φ Josephson junction (pronounced phi Josephson junction ) is a particular type of the Josephson junction , which has a non-zero Josephson phase φ across it in the ground state. A π Josephson junction , which has the minimum energy corresponding to the phase of π, is a specific example of it.
The Josephson energy U {... | https://en.wikipedia.org/wiki/Phi_Josephson_junction |
Phi Sigma Rho ( ΦΣΡ ; also known as Phi Rho or PSR ) is a social sorority for individuals who identify as female or non-binary in engineering and technology. The sorority was founded in 1984 at Purdue University . It has since expanded to more than 40 colleges across the United States.
Phi Sigma Rho was founded on Sep... | https://en.wikipedia.org/wiki/Phi_Sigma_Rho |
In chemistry , phi bonds ( φ bonds ) are usually covalent chemical bonds , where six lobes of one involved atomic orbital overlap six lobes of the other involved atomic orbital. This overlap leads to the formation of a bonding molecular orbital with three nodal planes which contain the internuclear axis and go through ... | https://en.wikipedia.org/wiki/Phi_bond |
In statistics , the phi coefficient (or mean square contingency coefficient and denoted by φ or r φ ) is a measure of association for two binary variables .
In machine learning , it is known as the Matthews correlation coefficient (MCC) and used as a measure of the quality of binary (two-class) classifications , intro... | https://en.wikipedia.org/wiki/Phi_coefficient |
Edwin Philip Pister (January 15, 1929 – January 17, 2023) was an American fishery biologist who worked for California Department of Fish and Game. [ 1 ] He was a pioneer of desert fish conservation, and is credited with saving the Owens pupfish ( Cyprinodon radiosis ) by transferring the entire remaining population int... | https://en.wikipedia.org/wiki/Phil_Pister |
Philip David Radford (born January 2, 1976) is an American consumer and environmental leader who is currently the President and CEO of Consumer Reports . [ 3 ] He previously served as Chief Strategy Officer of the Sierra Club , [ 4 ] [ 5 ] and as the executive director of Greenpeace USA. [ 6 ] Radford started his caree... | https://en.wikipedia.org/wiki/Phil_Radford |
Philibert Nang (born 1967 [ 1 ] ) is a Gabonese mathematician known for his work in algebra ( D-modules , Riemann–Hilbert correspondence ).
Nang won the 2011 ICTP Ramanujan Prize for his research in mathematics, and because he conducted it in Gabon the ICTP declared: "It is hoped that his example will inspire other yo... | https://en.wikipedia.org/wiki/Philibert_Nang |
Philip Coppens (October 24, 1930 – June 21, 2017) [ 2 ] was a Dutch -born American chemist and crystallographer known for his work on charge density analysis using X-rays crystallography [ 3 ] and the pioneering work in the field of photocrystallography . [ 4 ]
The Amersfoort -born Coppens received his B.S. and Ph.D. ... | https://en.wikipedia.org/wiki/Philip_Coppens_(chemist) |
Philip Hall FRS [ 1 ] (11 April 1904 – 30 December 1982), was an English mathematician . His major work was on group theory , notably on finite groups and solvable groups . [ 2 ] [ 3 ]
He was educated first at Christ's Hospital , where he won the Thompson Gold Medal for mathematics, and later at King's College, Cambri... | https://en.wikipedia.org/wiki/Philip_Hall |
Philip Stuart Kitcher (born 20 February 1947) is a British philosopher who is the John Dewey Professor Emeritus of philosophy at Columbia University . [ 4 ] He specialises in the philosophy of science , the philosophy of biology , the philosophy of mathematics , the philosophy of literature , and more recently pragmati... | https://en.wikipedia.org/wiki/Philip_Kitcher |
Philip Joseph Kocienski FRS (born 23 December 1946 [ 3 ] ) is a British organic chemist . He is an Emeritus Professor at the University of Leeds . [ 4 ]
Kocienski has made contributions to the design and development of new organometallic reagents in synthesis , and the applications of synthetic methods to complex natu... | https://en.wikipedia.org/wiki/Philip_Kocienski |
Philip Reed is a renowned model ship scratch builder and published author on the subject of model ship construction. [ 1 ] [ 2 ] He is known for his models of ships from the First and Second World Wars , as well as the Napoleonic era and the 17th century . [ 1 ] [ 3 ] Regarded as one of the finest model shipbuilders in... | https://en.wikipedia.org/wiki/Philip_Reed_(model_ship_maker) |
Philip Warren (born 1930 or 1931) is an English ship model maker best known for building a matchstick Maritime Fleet. His collection includes models of over 500 vessels and 1,000 aircraft , as well as of all the Royal Navy ships since 1945. [ 1 ] [ 2 ]
Philip Warren was born in Dorset , England , and was a director of... | https://en.wikipedia.org/wiki/Philip_Warren |
Philipp Kukura FRSC (born 26 March 1978) is Professor of Chemistry at the University of Oxford , and a Fellow of Exeter College, Oxford . [ 1 ] He is best known for pioneering contributions to femtosecond stimulated Raman spectroscopy (FSRS), interferometric scattering microscopy (iSCAT) and the development of mass pho... | https://en.wikipedia.org/wiki/Philipp_Kukura |
Philippa Marion Wiggins (nee Glasgow ) FRSNZ (16 July 1925 – 16 March 2017) was a New Zealand academic, who made significant contributions to the understanding of the structure of water in living cells. [ 1 ]
Wiggins studied science at the University of Canterbury , but although she wanted to continue in physics, wome... | https://en.wikipedia.org/wiki/Philippa_Wiggins |
Philips Hue is a line of color-changing LED lamps and white bulbs which can be controlled wirelessly . The Philips Hue line of bulbs was the first smart bulb of its kind on the market. [ 3 ] The lamps are currently created and manufactured by Signify N.V. , formerly the Philips Lighting division of Royal Philips N.V. [... | https://en.wikipedia.org/wiki/Philips_Hue |
Phillip A. Porras is a computer scientist and security researcher known for his work combating the Conficker worm. Porras leads the Internet Security Group in SRI International 's Computer Science Laboratory.
He was previously a manager of the Trusted Computer Systems Department of The Aerospace Corporation . Porras h... | https://en.wikipedia.org/wiki/Phillip_Porras |
The Phillips Machine , also known as the MONIAC ( Monetary National Income Analogue Computer ), Phillips Hydraulic Computer and the Financephalograph , is an analogue computer which uses fluidic logic to model the workings of an economy. The name "MONIAC" is suggested by associating money and ENIAC , an early electroni... | https://en.wikipedia.org/wiki/Phillips_Machine |
The Phillips catalyst , or the Phillips supported chromium catalyst, is the catalyst used to produce approximately half of the world's polyethylene . A heterogeneous catalyst , it consists of a chromium oxide supported on silica gel . [ 1 ] Polyethylene, the most-produced synthetic polymer, is produced industrially by... | https://en.wikipedia.org/wiki/Phillips_catalyst |
In astrophysics , the Phillips relationship is the relationship between the peak luminosity of a Type Ia supernova and the speed of luminosity evolution after maximum light. The relationship was independently discovered by the American statistician and astronomer Bert Woodard Rust and the Soviet astronomer Yury Pavlovi... | https://en.wikipedia.org/wiki/Phillips_relationship |
Philopatry is the tendency of an organism to stay in or habitually return to a particular area. [ 1 ] The causes of philopatry are numerous, but natal philopatry , where animals return to their birthplace to breed, may be the most common. [ 2 ] The term derives from the Greek roots philo , "liking, loving" and patra , ... | https://en.wikipedia.org/wiki/Philopatry |
The philosopher's stone [ a ] is a mythic alchemical substance capable of turning base metals such as mercury into gold or silver; [ b ] it was also known as "the tincture" and "the powder". Alchemists additionally believed that it could be used to make an elixir of life which made possible rejuvenation and immortality... | https://en.wikipedia.org/wiki/Philosopher's_stone |
Understood in a narrow sense, philosophical logic is the area of logic that studies the application of logical methods to philosophical problems, often in the form of extended logical systems like modal logic . Some theorists conceive philosophical logic in a wider sense as the study of the scope and nature of logic in... | https://en.wikipedia.org/wiki/Philosophical_logic |
Presentism (sometimes 'philosophical presentism') is the view of time which states that only present entities exist (or, equivalently, that everything which is exists presently) and what is present (i.e., what exists) changes as time passes. [ 1 ] According to presentism, there are no past or future entities at all, th... | https://en.wikipedia.org/wiki/Philosophical_presentism |
Philosophy & Technology is a quarterly peer-reviewed academic journal covering philosophy of technology . It is published by Springer Science+Business Media and the editor-in-chief is Luciano Floridi ( University of Oxford ). Besides regular issues, the journal publishes occasional special issues and topical collection... | https://en.wikipedia.org/wiki/Philosophy_&_Technology |
Philosophy of Arithmetic: Psychological and Logical Investigations ( German : Philosophie der Arithmetik. Psychologische und logische Untersuchungen ) is an 1891 book about the philosophy of mathematics by the philosopher Edmund Husserl . Husserl's first published book, it is a synthesis of his studies in mathematics, ... | https://en.wikipedia.org/wiki/Philosophy_of_Arithmetic |
The philosophy of computer science is concerned with the philosophical questions that arise within the study of computer science . There is still no common understanding of the content, aims, focus, or topics of the philosophy of computer science, [ 1 ] despite some attempts to develop a philosophy of computer science ... | https://en.wikipedia.org/wiki/Philosophy_of_computer_science |
Philosophy of design is the study of definitions of design , and the assumptions, foundations, and implications of design. The field, which is mostly a sub-discipline of aesthetics , is defined by an interest in a set of problems, or an interest in central or foundational concerns in design. In addition to these cent... | https://en.wikipedia.org/wiki/Philosophy_of_design |
Philosophy of ecology is a concept under the philosophy of science , which is a subfield of philosophy . Its main concerns centre on the practice and application of ecology , its moral issues, and the intersectionality between the position of humans and other entities. [ 1 ] This topic also overlaps with metaphysics , ... | https://en.wikipedia.org/wiki/Philosophy_of_ecology |
Philosophy of mathematics is the branch of philosophy that deals with the nature of mathematics and its relationship to other areas of philosophy, particularly epistemology and metaphysics . Central questions posed include whether or not mathematical objects are purely abstract entities or are in some way concrete, and... | https://en.wikipedia.org/wiki/Philosophy_of_mathematics |
In contemporary education , mathematics education —known in Europe as the didactics or pedagogy of mathematics —is the practice of teaching , learning , and carrying out scholarly research into the transfer of mathematical knowledge.
Although research into mathematics education is primarily concerned with the tools, m... | https://en.wikipedia.org/wiki/Philosophy_of_mathematics_education |
In philosophy , the philosophy of physics deals with conceptual and interpretational issues in physics , many of which overlap with research done by certain kinds of theoretical physicists . Historically, philosophers of physics have engaged with questions such as the nature of space, time, matter and the laws that gov... | https://en.wikipedia.org/wiki/Philosophy_of_physics |
The philosophy of statistics is the study of the mathematical, conceptual, and philosophical foundations and analyses of statistics and statistical inference. For example, Dennis Lindely argues for the more general analysis of statistics as the study of uncertainty . [ 1 ] The subject involves the meaning , justificati... | https://en.wikipedia.org/wiki/Philosophy_of_statistics |
The philosophy of technology is a sub-field of philosophy that studies the nature of technology and its social effects.
Philosophical discussion of questions relating to technology (or its Greek ancestor techne ) dates back to the very dawn of Western philosophy . [ 1 ] The phrase "philosophy of technology" was first ... | https://en.wikipedia.org/wiki/Philosophy_of_technology |
The phlogiston theory , a superseded scientific theory , postulated the existence of a fire-like element dubbed phlogiston ( / f l ɒ ˈ dʒ ɪ s t ən , f l oʊ -, - ɒ n / ) [ 1 ] [ 2 ] contained within combustible bodies and released during combustion . The name comes from the Ancient Greek φλογιστόν phlogistón ( burning u... | https://en.wikipedia.org/wiki/Phlogiston_theory |
The Phosphate ( Pho ) regulon is a regulatory mechanism used for the conservation and management of inorganic phosphate within the cell . It was first discovered in Escherichia coli as an operating system for the bacterial strain, and was later identified in other species. [ 1 ] The Pho system is composed of various co... | https://en.wikipedia.org/wiki/Pho_regulon |
Phobos ( / ˈ f oʊ b ə s / ; systematic designation : Mars I ) is the innermost and larger of the two natural satellites of Mars , the other being Deimos . The two moons were discovered in 1877 by American astronomer Asaph Hall . Phobos is named after the Greek god of fear and panic , who is the son of Ares (Mars) and t... | https://en.wikipedia.org/wiki/Phobos_(moon) |
The Phobos monolith is a large rock on the surface of Mars 's moon Phobos . [ 1 ] It is a boulder , about 85 m (279 ft) across and 90 m (300 ft) tall. [ 2 ] [ 3 ] A monolith is a geological feature consisting of a single massive piece of rock. Monoliths also occur naturally on Earth, but it has been suggested that the ... | https://en.wikipedia.org/wiki/Phobos_monolith |
The phomoxanthones are a loosely defined class of natural products . The two founding members of this class are phomoxanthone A and phomoxanthone B . Other compounds were later also classified as phomoxanthones, although a unifying nomenclature has not yet been established. [ 1 ] The structure of all phomoxanthones is ... | https://en.wikipedia.org/wiki/Phomoxanthone |
The mycotoxin phomoxanthone A , or PXA for short, is a toxic natural product that affects the mitochondria . It is the most toxic and the best studied of the naturally occurring phomoxanthones . PXA has recently been shown to induce rapid, non-canonical mitochondrial fission by causing the mitochondrial matrix to fragm... | https://en.wikipedia.org/wiki/Phomoxanthone_A |
The mycotoxin phomoxanthone B , or PXB for short, is a toxic natural product . It is a less toxic isomer of phomoxanthone A and one of the two founding members of the class of phomoxanthone compounds. The phomoxanthones are named after the fungus Phomopsis , from which they were first isolated, and after their xanthono... | https://en.wikipedia.org/wiki/Phomoxanthone_B |
The phoneME project is Sun Microsystems reference implementation of Java virtual machine and associated libraries of Java ME with source, licensed under the GNU General Public License .
The phoneME library includes implementations of Connected Limited Device Configuration (CLDC) and Mobile Information Device Profile (... | https://en.wikipedia.org/wiki/PhoneME |
A phone connector is a family of cylindrically -shaped electrical connectors primarily for analog audio signals . Invented in the late 19th century for tele phone switchboards , the phone connector remains in use for interfacing wired audio equipment , such as head phones , speakers , micro phones , mixing consoles , a... | https://en.wikipedia.org/wiki/Phone_connector_(audio) |
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