Loading...
  • instantaneous polarity
  • In electrical power systems, all wires carrying the same instantaneous polarity at any moment will have a common identifying marking scheme, such as wire color. (wikipedia.org)
  • For example, a set of loudspeakers used for stereo music reproduction will have all device terminals and wiring marked to ensure the same instantaneous polarity, so that the resulting sound produced by each speaker element is in the same phase and add correctly at the listener's ear. (wikipedia.org)
  • In electrical engineering, dot marking convention, or alphanumeric marking convention, or both, can be used to denote the same relative instantaneous polarity of two mutually inductive components such as between transformer windings. (wikipedia.org)
  • planar polarity
  • While cell polarity requires cells to distinguish their apical and basal-lateral surfaces, using cell-cell and cell substratum contact cues, Planar Polarity is the organization of groups of cells in the plane of the epithelium, such that they all orient to similar, apparently remote co-ordinates. (mshri.on.ca)
  • similarly, planar polarity of the fly eye is essential for accurate vision. (mshri.on.ca)
  • We are using the fruit fly, Drosophila melanogaster, as a genetically tractable organism to investigate the genetic and molecular mechanisms underlying planar polarity. (mshri.on.ca)
  • On the left is a scanning EM of the planar polarity of a chick inner ear. (mshri.on.ca)
  • Planar polarity is evident in Drosophila in the organization of bristles on the back, photoreceptors in the eye and hairs on the wing. (mshri.on.ca)
  • On the back of the fly, all of the chemosensory bristles point posteriorly (see Figure 2, bottom left panel) In the fly wing, planar polarity is evident that all of the cells secrete a single hair that points distally (Figure 2, bottom right panel). (mshri.on.ca)
  • A genetic pathway responsible for the accurate organization of cells in all of these tissues has been determined through analysis of mutants that specifically affect planar polarity, while leaving cell identity. (mshri.on.ca)
  • D/V planar polarity, seen in cross-sections (above right) is formed when ommatida in the eye disc rotate 90° through space , to achieve opposite polarities in the dorsal and ventral fields of the eye. (mshri.on.ca)
  • We identified a novel transcription factor, which we called Mirror, which is expressed only in the dorsal half of the eye, and regulates the precise patterning that occurs at the equatorial border of dorsal-ventral planar polarity. (mshri.on.ca)
  • Mirror expression is indicated in by the pigment granules in the sections ( left) and by the red shading ( schema on right) Where borders of Mirror expressing cells meet non-expressing cells, borders of planar polarity form. (mshri.on.ca)
  • embryogenesis
  • The gooseberry gene's role in segmentation was believed to be involved in segment-polarity class of segmentation genes required for the formation of larval segments because, during embryogenesis, half of the larval segments are replaced by the remain half segment, but in a reversed polarity, which suggested that gooseberry was a single gene. (wikipedia.org)
  • In fact, the axis polarity serves as one coordinate of geometrical system in which early embryogenesis is organized. (wikipedia.org)
  • reversal
  • Subduction polarity reversal is a geologic process in which two converging plates switch roles: The over-lying plate becomes the down-going plate, and vice versa. (wikipedia.org)
  • This phenomenon is called subduction switch, the flipping of subduction polarity or subduction polarity reversal. (wikipedia.org)
  • Examples of subduction systems with subduction polarity reversal are: Caledonides, Ireland Alps-Apennines, Italy Kamchatka, Russia Wetar, eastern Indonesia Timor, east Savu Sea Mediterranean Taiwan The phenomenon of subduction polarity reversal has been identified in the collision of an intra-oceanic subduction system, which is the collision of two oceanic plates. (wikipedia.org)
  • One of the possible results is subduction polarity reversal. (wikipedia.org)
  • Even though many geologists agree that after the involvement of buoyant continental crust, subduction polarity reversal may occur, they have different opinions towards the mechanisms leading to the change of subduction direction. (wikipedia.org)
  • Thus, there is no single model to represent subduction polarity reversal. (wikipedia.org)
  • The criteria for having subduction polarity reversal are Intra-oceanic subduction system with a buoyant continental plate Subduction system ceases with the involvement of continental plate Old slab breaks off Different models representing the subduction polarity reversal depends highly on parameters the Geologists considered. (wikipedia.org)
  • In reflection seismology, a polarity reversal or phase change is a local amplitude seismic attribute anomaly that can indicate the presence of hydrocarbons and is therefore known as a direct hydrocarbon indicator. (wikipedia.org)
  • For a polarity reversal to occur, the shale has to have a lower acoustic impedance than the water sand and both are required to have a higher acoustic impedance than the oil/gas sand. (wikipedia.org)
  • 2018
  • Terrel Croft, Wilford Summers, American Electricians' Handbook, Eleenth EditionMcGraw Hill, 1987, ISBN 0-07-013932-6, p. 5-44 - 5-45 http://www.idc-online.com/technical_references/pdfs/electrical_engineering/Transformer_Polarity.pdf Transformer Polarity, retrieved 2018 Jan 16 Alexander, Charles (2009). (wikipedia.org)
  • Examples
  • Classical examples of polarized cells are described below, including epithelial cells with apical-basal polarity, neurons in which signals propagate in one direction from dendrites to axons, and migrating cells. (wikipedia.org)
  • Some examples of planar cell polarity include the scales of fish being oriented in the same direction and similarly the feathers of birds, the fur of mammals, and the cuticular projections (sensory hairs, etc.) on the bodies and appendages of flies and other insects. (wikipedia.org)
  • As examples of polarity items, consider the English lexical items somewhat and at all, as used in the following sentences: I liked the film somewhat. (wikipedia.org)
  • Migration
  • Main article: Polarity establishment in yeast Generation of cellular polarity is critically important for the function of practically every cell type and underlies processes like cell division, differentiation, cell migration, cell-cell signalling and fertilization. (wikipedia.org)
  • Bond
  • Table salt is more soluble in water than baking soda because of the difference in polarity, bond types and compound size. (reference.com)
  • signals
  • Where alternating current circuits are used to carry signals such as audio, polarity is also required to ensure proper function of the system. (wikipedia.org)
  • commonly
  • The commonly used symbol denoting the polarity of a device or adapter consists of a black dot with a line leading to the right and a broken circle (like the letter "C") surrounding the dot and with a line leading to the left. (wikipedia.org)
  • Two methods are commonly used to denote which terminals present the same relative polarity. (wikipedia.org)
  • thereby
  • A timer circuit communicates with the current source and the polarity switching circuit to automatically ramp down the current, switch polarity and then ramp up the current after the polarity has been switched, thereby permitting the iontophoretic process to take place under both electrodes with one application. (google.com)
  • As well as a number, each chron is divided into two parts, labelled "n" and "r", thereby showing the position of the field's polarity. (wikipedia.org)
  • negative
  • An electric charge can have either positive or negative polarity. (wikipedia.org)
  • The polarity of the adapter cord and plug must match the polarity of the device, meaning that the positive contact of the plug must mate with the positive contact in the receptacle, and the negative plug contact must mate with the negative receptacle contact. (wikipedia.org)
  • A device with a minus sign at the end of the line leading from the center dot has "negative polarity" and requires an adapter of negative polarity. (wikipedia.org)
  • In linguistics, a polarity item is a lexical item that can appear only in environments associated with a particular grammatical polarity - affirmative or negative. (wikipedia.org)
  • A polarity item that appears in affirmative (positive) contexts is called a positive polarity item (PPI), and one that appears in negative contexts is a negative polarity item (NPI). (wikipedia.org)
  • On the other hand, at all is licensed by the negative environment of sentence (2), but anti-licensed by the positive environment of sentence (3), and is therefore considered a negative polarity item (NPI). (wikipedia.org)
  • The actual set of contexts that license particular polarity items is not as easily defined as a simple distinction between affirmative and negative sentences. (wikipedia.org)
  • results
  • Leads of primary and secondary windings are said to be of the same polarity when instantaneous current entering the primary winding lead results in instantaneous current leaving the secondary winding lead as though the two leads were a continuous circuit. (wikipedia.org)
  • It primarily results from the change in polarity of the seismic response when a shale (with a lower acoustic impedance) overlies a brine-saturated zone (with a high acoustic impedance), that becomes invaded with an oil/gas sand (with the lowest acoustic impedance of the three). (wikipedia.org)
  • terminals
  • Transformers are said to have "additive" or "subtractive" polarity based on their physical arrangement of terminals and the polarity of windings connected to the terminals. (wikipedia.org)
  • electric
  • A voltage or potential difference between two points of an electric circuit has a polarity, describing which of the two points has the higher electric potential. (wikipedia.org)
  • second
  • In Alternative Shakespeare, Cotherine Belsey uses sexual polarity as lens for both interpretation of William Shakespeare's comedies and in critique of second-wave feminism. (wikipedia.org)
  • The second principle is segregation of polarity determinants. (wikipedia.org)
  • In AC systems the two wires of a circuit alternate polarity many times per second. (wikipedia.org)
  • certain
  • In geometry, trilinear polarity is a certain correspondence between the points in the plane of a triangle not lying on the sides of the triangle and lines in the plane of the triangle not passing through the vertices of the triangle. (wikipedia.org)
  • studio album
  • Polarity is a studio album by American hip hop group Norman, consisting of rappers Onry Ozzborn and Barfly, both members of the Pacific Northwest hip hop collective Oldominion. (wikipedia.org)
  • Polarity is the third studio album by the American death metal band, Decrepit Birth. (wikipedia.org)
  • control
  • A polarity control between the current source and the electrodes determines the direction of current flow through and between the electrodes. (google.com)
  • type
  • Since there is no standardization of these plugs, a polarity symbol is printed on the case indicating which type of plug is needed. (wikipedia.org)
  • However, there are many complications, and not all polarity items of a given type need necessarily have exactly the same set of licensing contexts. (wikipedia.org)