pseudochannel

Noun

pseudochannel (plural pseudochannels)

1. A subparallel feature consisting of a central core of undeformed strata, roughly U-shaped in cross section and cigar-shaped in plan, embedded in finer grained material.
   • The best exposures of pseudochannels are at the Wilson Creek, Walnut Creek, Canyoun Creek, and Gerald Wash section localities. The features are restricted to the gray unit of the upper member and nearly all of the well-developed pseudochannels are in the gray facies and the gray sandstone.1949, Harry Clifford Granger, Robert Bruce Raup, “Stratigraphy of the Dripping Spring Quartzite, Southeastern Arizona”, in Geological Survey Bulletin, page 47
   • The large pseudochannel seen in cross section in the center of the photograph is surrounded by a multitude of smaller pseudochannels.1964, Alfred Herman Chidester, Talc Resources of the United States - Issues 1167-1170, page 50
2. One division of an actual channel into multiple theoretical channels, one per opening, to represent flow through openings into sidestreams.
   • This method requires that pseudochannel boundaries be located in the flow reach upstream from each of the openings to simulate the actual upstream boundaries of the single-opening constriction.1958, Jacob Davidian; P.H. Carrigan, Jr.; John Shen, “Flow Through Opening in Width Constrictions”, in Surface Water Supply of the United States, number 1369, page 101
   • To determine the discharge, establish in the approach channel pseudochannel boundaries which divide the flow between openings. This procedure defines a separate approach channel for each individual opening.1967, Howard F. Matthai, “Meaurement of Peak Discharge at Width Contractions by Indirect Methods”, in Techniques of Water-resources Investigations of the United States Geological Survey, page 33
3. One of multiple orthorectified images for a single location, each representing a different DEM (digital elevation model).
   • As a result, multispectral orthorectified images were created, each containing the respective DEM as a separate pseudochannel.2014, Nektarios Chrysoulakis, Eduardo Anselmo de Castro, Eddy J. Moors, Understanding Urban Metabolism: A Tool for Urban Planning, page 65
4. A virtual channel included in the mathematical model of electron collisions to account for excluded states when using the Matrix Effective Potential (MEP) method.
   • For such potentials the imaginary part of the potential causes a loss of flux from the incident channel and plays a comparable role to the pseudochannel of the MEP.1981, Devarajan Thirumalai, Effective Potential Studies of Electron-atom and Electron-molecule Collisions, page 32
   • In the first run, we assume unit incident flux in the pseudochannel ф₁, while in the second unit incident flux is assumed in ф₂.1991, Mangalam A. Nagarajan, Heavy Ion Collisions at Energies Near the Coulomb Barrier, page 214
5. Any data channel that is introduced as a theoretical pathway that does not correspond to a physical channel.
   • We may regard the signals to the three speakers as coming from three pseudochannels, having certain signal-to-crosstalk ratios. The ratios for each pseudochannel are those between the voltage, produced by a signal in the pseudochannel, across the intended speaker; and the voltages, produced by that...1961, IRE Transactions on Audio - Volumes 9-10, page 75
   • All data to and from primary memory in the IBM/360 model 30 are transmitted over 8-bit (plus parity) data paths including the pseudochannels.1986, G. W. Gorsline, Computer Organization: Hardware/software, page 250
6. A theoretical channel representing the pathway by which a chemical agent interacts with a receptor site.
   • […] catecholamines bind between the third and fifth membrane span of the ß adrenergic receptor and the orientation of bound agonist might be viewed as linking to sites of an internal pseudochannel in the receptor molecule ( FIGURE 1 ).1991, Emanuel Rubin, Keith W. Miller, Sheldon H. Roth, Molecular and Cellular Mechanisms of Alcohol and Anesthetics, page 569
   • […] into three-dimensional hydrogen bond frameworks featuring three-dimensional intersecting pseudochannels.2004, Canadian Journal of Chemistry, volume 82, page 616