wiktionary TOCright Phase or phases may refer to In science In physics Phase matter , a physically distinctive form of a substance, such as the solid, liquid, and gaseous states of ordinary matter Phase transition is the transformation of a thermodynamic system from one phase to another Phase separation science Mobile phase and stationary phase chemistry Stationary phase in chromatography Aqueous phase and organic phase in liquid liquid extraction Phase waves , the initial angle of a sinusoidal function ... in multiple conducting wires with definite phase offsets Single phase electric power Three phase electric power Three phase , the mathematics of three phase electric power Phase problem , the loss of information the phase from a physical measurement Phase factor , a complex scalar used in quantum mechanics Continuous Fourier transform , the angle of a complex coefficient representing the phase of one sinusoidal component Instantaneous phase , generalization for both cyclic and non cyclic phenomena In other sciences Archaeological phase , a discrete period of occupation at an archaeological site Lunar phase , the appearance of the Moon as viewed from the Earth Planetary phase , the appearance ... Color phase , in biology, a group of individuals within a species with a particular coloration Phase syntax , in linguistics, a cyclic domain proposed by Noam Chomsky In entertainment Phase ... monsters in the .hack franchise Phase IV , a 1974 science fiction movie directed by Saul Bass Phase, an incarnation of the DC Comics character usually known as Phantom Girl Phaze, an alternate world in Piers Anthony s Apprentice Adept series Other uses Phase 10 , a card game created by Fundex Games Phase video game , a music game for the iPod developed by Harmonix Music Systems Phase combat ... Phasor disambiguation FASOR disambiguation disambig bg ca Fase cs F ze da Fase de Phase es Fase fa fr Phase gl Fase hr Faza id Fase ia Phase it Fase he lv F ze ms Fasa nl Fase ... more details
Refimprove date December 2010 S phase synthesis phase is the part of the cell cycle in which DNA is DNA replication replicated , occurring between G1 phase G sub 1 sub phase and G2 phase G sub 2 sub phase . Precise and accurate DNA replication is necessary to prevent genetic abnormalities which often lead to cell death or disease. Due to the importance, the regulatory pathways that govern this event in eukaryotes are highly conserved. This conservation makes the study of S phase in model organisms such as Xenopus laevis embryos and budding yeast relevant to higher organisms. S Phase Regulation The G1 S transition is a major checkpoint in the regulation of the cell cycle . Depending on levels of nutrients, energy and external factors, cells must decide to enter the cell cycle or move into a non dividing state known as G0 phase . This transition, as with all of the major checkpoint transitions in the cell cycle, is signaled by cyclins and cyclin dependent kinase CDKs . The pulse of G1 S cyclins causes CLN3 Cdk1 to activate Cln1 2, Start point yeast as well as Clb5 6 at the initiation of S phase. This pathway contains 2 positive feedback loops, allowing for rapid, unidirectional movement into S phase. Redundant pathways like this are not uncommon because they allow for tuning the output of the system and often lead to faster genetic evolution. ref name Bell Bell, S.P. and Dutta, A. DNA replication in eukaryotic cells. Annu.Rev.Biochem. 2002,71 333 374. ref DNA Replication The major event in S phase is DNA replication . The goal of this process is to create exactly two identical ... replication complexes onto the DNA at replication origins during G1 phase which are dismantled in S phase ... DNA Damage Damage to DNA is detected and fixed during S phase. When the replication fork comes upon ... DNA replication. Curr. Opin. Cell Biol. 2005, 17 568 575. ref See also S phase index SPI S fraction or S phase fraction oncology pathology prognosis References reflist Cell cycle DEFAULTSORT S Phase ... more details
Phase 4 or Four phase may refer to Phase 4 Films Phase IV , 1974 film The fourth of the phases of clinical research Phase 4 Stereo , record label Four Phase Systems Four phase logic Four phase model disambig de Phase IV ... more details
The term stationary phase may refer to Stationary phase biology , a phase in bacterial growth Stationary phase chemistry , a medium used in chromatography Stationary phase approximation in the evaluation of integrals in mathematics mathdab es Fase estacionaria ... more details
Phase 1 , Phase I or Phase One may refer to The first of the phases of clinical research Canadian Phase I , a powered parachute design Phase I reaction s , in drug metabolism Phase I environmental site assessment , a report prepared for a real estate holding which identifies potential or existing environmental contamination liabilities Phase 1 bar , a lesbian bar and nightclub at 525 8th Street, Southeast in Washington, D.C Phase One company , a Danish camera equipment company Phase One Art Ensemble of Chicago album Phase One Art Ensemble of Chicago album , 1971 Phase One Saga album Phase One Saga album , 1998 Phase One film Phase One film , an upcoming American Canadian thriller League of Legends Clan aus Deutschland. Phase 1 die Besten der Besten See also Phase disambiguation disambiguation it Phase One nl Phase One ... more details
Phase 5 may refer to Phase5 , a hardware manufacturer for the Amiga computer Deployment phase 5 , a final deployment phase of a U.S. Marine Corps reconnaissance force Pandemic phase 5 , the second highest level of a pandemic alert disambig ... more details
Reverse phase RP refer to Reversed phase chromatography , any chromatographic method that uses a non polar stationary phase Reverse phase protein lysate microarray , a micro cell lysate dot blot that allows measurement of protein expression levels disambiguation ... more details
Phase perturbation is the shifting, from whatever cause, in the phase waves phase of an electronics electronic Signalling telecommunication signal . The shifting is often quite rapid, and may appear to be random or cyclic. The phase departure in phase perturbation usually is larger, but less rapid, than in Jitter phase jitter . Phase perturbation may be expressed in degrees, with any cyclic component expressed in hertz . References FS1037C MS188 Category Telecommunications terms Telecomm term stub ... more details
Linear phase is a property of a filter signal processing filter , where the phase response of the filter is a linear function of frequency , excluding the possibility of wraps at math pm pi math . In a causal system , perfect linear phase can be achieved with a discrete time Finite Impulse Response FIR filter. Linear phase system has the property of the true time delay . Since a linear phase or Linear phase Generalized linear phase generalized linear phase filter has constant group delay , all frequency components have equal delay times. That is, there is no distortion due to the time delay of frequencies relative to one another in many applications, this constant group delay is advantageous. By contrast, a filter with non linear phase has a group delay that varies with frequency, resulting in phase distortion . Some examples of linear and non linear phase filters are given below. The plots below represent the phase response as a function of frequency in radians math w math . Image Phase Plots.svg Generalized linear phase Systems with generalized linear phase have an additional frequency independent constant added to the phase. Because of this constant, the phase of the system is not a strictly linear function of frequency, but it retains many of the useful properties of linear phase systems. ref Oppenheim & Schafer first edition, chapter 5 ref See also Minimum phase References reflist Category Electronics terms Category Digital signal processing signal processing stub nl Lineaire fase ... more details
Refimprove date March 2011 A Phase in combat is usually a period within a military operation of a longer duration that is a part of a serial chain of logically connected activities planned to culminate in a defined Goal objective or goal. A phase is usually marked by achievement of significant intermediary objective s, such as Tactical objective tactical within an Engagement military engagement . A phase may be either limited by time allocated for its execution, or unlimited in time, and defined only by achievement of the objective. At the Strategy strategic level, a phase continue for years. Not all phases of combat include fighting between armed forces . Phases can, and usually do overlap, and sometimes can be planned for parallel execution, often as part of deception plan ning. Phases typically found in Offensive military offensive military operations are Preparation Intelligence information gathering Intelligence gathering phase ref Also known as reconnaissance ref Operations planning phase Logistics Management Logistics management phase Deception and Counter intelligence counterintelligence phase Assembly phase Conduct Initial combat assault phase Breakthrough military Breakthrough phase Exploitation military Exploitation Follow on support phase Pursuit combat Pursuit phase Objective security phase Position consolidation phase Defense military Defensive phase Reorganisation phase A lull in combat usually unplanned Stability Enable civil authorities Citations and notes reflist References Category Military theory Category Military strategy Category Military tactics mil stub ... more details
no footnotes date September 2011 In signal processing , phase distortion or phase frequency distortion is distortion that occurs when a a filter s phase response is not linear over the frequency range of interest, that is, the Phase waves phase shift introduced by a electrical network circuit or device is not directly proportional to frequency, or b the zero frequency intercept of the phase frequency characteristic is not 0 or an integral multiple of 2 radians. See also Audio system measurements References FS1037C MS188 Noise Category Electrical parameters physics stub ... more details
Unreferenced date December 2009 The Acute phase of an injury is the period of time in between when the injury is sustained, and the beginning of the sub acute phase . Depending on the severity of injury, and the age and health of the patient, this phase can take up to four or five days. The acute phase is characterised by some or all of the following immediate pain , tenderness, swelling, inflammation and oedema , contour deformity, bleeding , and loss of normal function of the injured area. See also Acute phase protein DEFAULTSORT Acute Phase Category Injuries ... more details
wiktionary beta Beta phase may refer to the second phase in a software release life cycle see Software release life cycle Beta . the second phase of pharmacokinetics see Pharmacokinetics Stages of Pharmacokinetic Processes . Disambiguation ... more details
A phase line may refer to Phase line mathematics , used to analyze Autonomous system mathematics autonomous ordinary differential equation s Phase line cartography , used to identify phases of military operations or changing borders over time disambig ... more details
Moorehead Phase Moorehead Phase Cahokia An archaeological phase of the Cahokia and environs from years 1200 1275 CE. Moorehead Phase of the Laurentian Tradition or the Moorehead burial tradition The Red Paint People , who used large quantities of ochre, normally red, to cover both bodies and grave goods, 3000 BCE and 1000 BCE. dab ... more details
other uses In the context of vectors and Phasor electronics phasors , the term phase angle refers to the angular component of the polar coordinate representation. The notation math A ang theta, math for a vector with magnitude or amplitude A and phase angle , is called angle notation . In the context of periodic phenomena, such as a Sine wave wave , phase angle is synonymous with Phase waves phase . See also Phasor sine waves Phase waves External links http www.sengpielaudio.com calculator timedelayphase.htm Calculation of phase angle phase difference from time delay time of arrival ITD and frequency Connection between phase, phase angle, frequency, and time of arrival delay FS1037C DEFAULTSORT Phase Angle Category Angle Category Wave mechanics ar de Phasenverschiebung fr D phasage lv F u nob de pl K t fazowy ru fi Vaihekulma th tr Faz a s ... more details
Unreferenced date October 2009 In signal processing and electrical engineering , phase response is the relationship between the phase waves phase of a sinusoid al input and the output signal information theory signal passing through any device that accepts input and produces an output signal, such as an amplifier or a filter signal processing filter . Amplifiers, filters, and other devices are often categorized by their amplitude and or phase response. The amplitude response is the ratio of output amplitude to input, usually a function of the frequency. Similarly, phase response is the phase of the output with the input as reference. The input is defined as zero phase. A phase response is not limited to lying between 0 and 360 , as phase can accumulate to any amount of time. See also Group delay and phase delay DEFAULTSORT Phase Response Category Trigonometry Category Wave mechanics Category Signal processing Tech stub de Phasengang pl Charakterystyka fazowa ru sv Fasg ng uk ... more details
A phase converter is a device that converts electric power provided as Single phase electric power single phase to Polyphase system multiple phase or vice versa. The majority of phase converters are used to produce three phase electric power from a single phase source, thus allowing the operation of three phase equipment at a site that only has single phase electrical service. Phase converters are used where three phase service is not available from the utility, or is too costly to install due to a remote location. A utility will generally charge a higher fee for a three phase service because of the extra ... Three phase induction motors may operate adequately on an unbalanced supply if not heavily loaded. This allows various imperfect techniques to be used. A single phase motor can drive a three phase generator, which will produce a high quality three phase source but with high cost for apparatus. Several methods exist to run three phase motors from a single phase supply, these can in general be classified as Electronic means of creating three phase where the incoming power is rectified, and the three phase power is synthesized with electronics. Power electronic devices directly produce a three phase waveform from single phase power, using a rectifier and inverter electrical inverter combination. This also offers the advantage of variable frequency. A digital phase converter uses a rectifier ... phase source to create three phase power. Unlike a phase converting VFD, it cannot vary ... of the single phase supply. It does have the advantage of a sine wave output voltage and excellent voltage balance between the phases. Rotary phase converter s constructed from a three phase electric ... phase balance and power factor. This is a two motor solution. One motor is not connected to a load and produces the three phase power, the second motor driving the load runs on the power produced ... of the legs of the three phase motor. Current is sometimes injected into the third leg with a capacitor ... more details
Phase II may refer to The second of the phases of clinical research Drug metabolism Phase II Star Trek Phase II , a planned Star Trek television series that eventually evolved into Star Trek The Motion Picture Star Trek Phase II fan series , a fan made series of films based on the original Star Trek series Blaze band , a house music band, alias Phase II PHASE 2 , graffiti artist selfref Phase II may also refer to Wikipedia Phase II software . disambig ... more details
Multiple issues wikify February 2012 refimprove February 2012 orphan December 2009 Image horn antenna apparent phase center.png frame In horn and other directional antennas, the apparent phase center is used since radiation is only emitted at certain angles . In antenna electronics antenna design theory, the phase center is the point from which the electromagnetic radiation spreads spherically outward, with the phase of the signal being equal at any point on the sphere. Apparent phase center is used to describe the phase center in a limited section of the radiation pattern . References reflist J. D. Dyson, Determination of the Phase Center and Phase Patterns of Antennas, in Radio Antennas for Aircraft and Aerospace Vehicles, W. T. Blackband ed. , AGARD Conference Proceedings, No. 15, Slough, England Technivision Services, 1967. Y. Y. Hu, A Method of Determining Phase Centers and Its Applications to Electromagnetic Horns, Journal of the Franklin Institute, Vol. 271, pp. 31 39, January 1961. DEFAULTSORT Phase Center Category Antennas Telecomm stub de Phasenzentrum ... more details
Phase curve may refer to Phase curve astronomy is the brightness of a reflecting body as a function of its phase angle. Phase response curve is the relationship between the timing and the effect of a treatment designed to affect circadian rhythms. Phase diagram is a type of chart used to show conditions at which thermodynamically distinct phases can occur at equilibrium. Phase angle astronomy is the angle between the light incident onto an observed object and the light reflected from the object. Phase separation is the state when two or more distinct phases co exist within the same thermodynamic system. Disambig ... more details
Proliferative phase can refer to a phase of wound healing another name for the follicular phase of the menstrual cycle disambig Short pages monitor This long comment was added to the page to prevent it being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Longcomment. Please do not remove the monitor template without removing the comment as well. ... more details
Phase synchronization is the process by which two or more cyclic signals tend to oscillate with a repeating sequence of relative phase waves phase angles. Phase synchronisation is usually applied to two waveforms of the same frequency with identical phase angles with each cycle. However it can be applied if there is an integer relationship of frequency, such that the cyclic signals share a repeating sequence of phase angles over consecutive cycles. These integer relationships are the so called Arnold tongues which follow from bifurcation of the circle map. One example of phase synchronization of multiple oscillators can be seen in the behavior of Southeast Asian fireflies . At dusk, the flies begin to flash periodically with random phases and a gaussian distribution of native frequencies. As night falls, the flies, sensitive to one another s behavior, begin to synchronize their flashing. After some time all the fireflies within a given tree or even larger area will begin to flash simultaneously in a burst. Thinking of the fireflies as biological oscillators , we can define the phase to be 0 during the flash and 180 exactly halfway until the next flash. Thus, when they begin to flash in unison, they synchronize in phase. One way to keep a local oscillator phase synchronized with a remote transmitter uses a phase locked loop . See also Algebraic connectivity Alternator synchronization Kuramoto model References Sync by S. H. Strogatz 2002 . Synchronization A universal concept in nonlinear sciences by A. Pikovsky, M. Rosenblum, J. Kurths 2001 Category Wave mechanics ru ... more details
Orphan date February 2009 The premycotic phase is a phase of mycosis fungoides in which a patient has areas of red, scaly , itchy skin on areas of the body that are usually not exposed to sun. This is early phase mycosis fungoides, but it is hard to diagnose the rash as mycosis fungoides during this phase. The premycotic phase may last from months to decades. External links http www.cancer.gov Templates db alpha.aspx?CdrID 439417 Premycotic phase entry in the public domain NCI Dictionary of Cancer Terms NCI cancer dict Category Lymphoid related cutaneous conditions Cutaneous condition stub ... more details
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