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Topic: Cylindrical

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  Cylindrical Map Projections
The normal aspect for cylindrical projections assumes that the cylinder is tangent to the globe along the Equator.
Cylindrical stereographic projections are rarely used, although Gall's stereographic projection has been proposed as compromise projection having less distortion of distances than the cylindrical gnomonic projection and less distortion of shapes than the cylindrical orthographic projection.
The cylindrical orthographic projection assumes that the light source is an infinite distance from the projection surface, resulting in parallel rays of light.
www.fes.uwaterloo.ca /crs/geog165/cylproj.htm   (1163 words)

 GDT: Cylindrical Specifications
The surface must lie between the two cylindrical surface which bound the tolerance zone and are determined by a best-fit nominal cylinder.
Since the roundness or cylindricity tolerance is a radial distance between concentric boundaries, a radial method of checking the surface is necessary.
To truly check for the roundness or cylindricity of a surface without regard to the axis of the part, the part must be rotated about the ultra-precision spindle of a specialized roundness measuring machine.
www.efunda.com /DesignStandards/gdt/cylindricalspecs.cfm   (482 words)

 Cylindrical Surface Pasting   (Site not responding. Last check: 2007-09-17)
Cylindrical pasting is a parametric-blending method that creates a smooth transition surface between a pair of B-spline surfaces that do not originally intersect.
In cylindrical pasting, a transition cylinder can be pasted on a NUBS surface or onto a NUBS cylinder.
A displacement scheme is used to locate the control points of the blending cylinder to achieve approximate $C^1$ continuity between the boundaries of the base surfaces and the edges of the cylinders.
www.cgl.uwaterloo.ca /Projects/Splines/pasting/cylindrical/CS-99-13.html   (277 words)

 Cylindrical Jets
Stationary cylindrical jets are used in heavy-ion fusion chamber designs to construct a grid of shielding to protect wall material between ion beam ports.
Many people are quick to note that an array of cylindrical jets provides square apertures along the beamlines, while the solid ports through which the beams enter the chamber are round.
They are right to note this, and the issue can be remedied either by sacrificing some material at the beam port, which will be damaged over time (a bad option), or through adding a protective layer of fluid inside the beam tube that will spread at the chamber and provide additional protection.
www.nuc.berkeley.edu /~pbardet/indexli4.html   (736 words)

 Cylindrical Coordinates
It is important to compare the units that are used in Cartesian coordinates with the units that are used in cylindrical coordinates.
In cylindrical coordinates, (r, theta, z), two of the coordinates -- r and z -- measure length and, thus, are in units of length but the coordinate theta measures angles and is in "units" of radians.
When we worked in Cartesian coordinates we broke the region D into squares and then estimated the volume over each square by looking at a prism whose height was determined by evaluating the function f at a point in the square.
www.math.montana.edu /frankw/ccp/multiworld/multipleIVP/cylindrical/body.htm   (1127 words)

 What is cylindrical eye power? - Eyes - DoctorNDTV
Cylindrical powers are generated generally by the shape of the cornea (transparent front layer of the eye).
Cylindrical powers are those ones that are present only in a particular axis.
The axis at which the cylindrical power is required is specifically noted.
www.doctorndtv.com /FAQ/detailfaq.asp?id=2384   (181 words)

 Cylindrical lenses for alignment of optical sources and destinations (US6014270)
A second pair of cylindrical lenses is disclosed comprised of a third cylindrical lens and a fourth cylindrical lens.
a first pair of cylindrical lenses comprised of a first cylindrical lens and a second cylindrical lens, the first cylindrical lens having a first cylindrical axis and the second cylindrical lens having a second cylindrical axis and wherein the first cylindrical axis and the second cylindrical axis are substantially perpendicular to one another;
and wherein the first cylindrical axis and the second cylindrical axis are both not parallel to either the first or the second line segments.
www.delphion.com /details?pn=US06014270__   (466 words)

 Cylindrical Pixel Transfer   (Site not responding. Last check: 2007-09-17)
The goal of cylindrical pixel transfer is an automatic and reliable estimate of pixel correspondences between reference-views and visual prediction.
Their approach uses the angular disparity (related to each cylindrical pair) to automatically generate warps that map reference views to arbitrary cylindrical or planar views.
the cylindrical epipolar line), formed by the projection of a ray across the surface of a cylinder, (labeled "virt"), where the ray is specified by its positions on some other cylinder, (labeled "left").
homepages.inf.ed.ac.uk /rbf/CVonline/LOCAL_COPIES/LIVATINO2/CylTransf/node1.html   (823 words)

 Battery packaging - a look at old and new systems
The cylindrical cell continues to be the most widely used packaging.
Cylindrical cells are equipped with a resealable venting mechanism to release pressure under extreme conditions such as excessive overcharge.
The drawback of the cylindrical cell is poor space utilization.
www.batteryuniversity.com /partone-9.htm   (965 words)

 Curled-Up Dimensions
One of the first suggestions for closed cylindrical dimensions was made by Theodor Kaluza in 1919, in a paper communicated to the Prussian Academy by Einstein in 1921.
Of course, these three dimensions are not individually cylindrical, nor do they commute, but at each point in three-dimensional space they constitute a closed three-dimensional manifold isomorphic to the group of rotations.
This is interesting because, even though a closed cylindrical space may be locally Lorentzian, it is globally absolute, in the sense that there is a globally distinguished state of motion with respect to which an inertial observer's natural surfaces of simultaneity are coherent.
www.mathpages.com /rr/s7-04/7-04.htm   (1012 words)

 Map Projection Overview
Cylindrical Equal-Area projections have straight meridians and parallels, the meridians are equally spaced, the parallels unequally spaced.
Gall's stereographic cylindrical projection results from projecting the earth's surface from the equator onto a secant cylinder intersected by the globe at 45 degrees north and 45 degrees south.
The Peters projection is a cylindrical equal-area projection that de-emphasizes area exaggerations in high latitudes by shifting the standard parallels to 45 or 47 degrees.
www.colorado.edu /geography/gcraft/notes/mapproj/mapproj.html   (1829 words)

The coordinate surfaces for the rectangular coordinate system are the planes perpendicular to the coordinate axes, x = a, y = b, and z = c.
However, instead of the r coordinate, another polar coordinate system is drawn along the r-ray with the z axis as the polar axis.
The conversions are still the standard rectangular-polar conversion from cylindrical to spherical.
www-math.cudenver.edu /~rbyrne/online/s00/2422w4.htm   (391 words)

 Re: Equation of motion for Cylindrical
Re: Equation of motion for Cylindrical - supachai, Thu, 25 Nov 2004, 10:19 p.m.
Re: Equation of motion for Cylindrical - ans, Fri, 26 Nov 2004, 10:18 p.m.
Re: Equation of motion for Cylindrical - supachai, Mon, 29 Nov 2004, 3:48 a.m.
www.cfd-online.com /Forum/main_archive.cgi?read=34137   (124 words)

 Cylindrical Air Column Modeling   (Site not responding. Last check: 2007-09-17)
In a previous section, it was found that wave motion in wind instruments with cylindrical bores is adequately represented by plane-wave propagation along the length of the pipe.
In general, the acoustic properties of the end of the wind-instrument bore are characterized by a non-zero and complex valued load impedance and this impedance can be expressed as a lumped traveling-wave reflectance, as given by the bracketed term of Eq.
The lowest two cutoff frequencies for transverse modes in the cylindrical bore of a flute are approximately 11.96 kHz and 19.8 kHz.
www.music.mcgill.ca /~gary/614/week8/pipeemodel.html   (1065 words)

 Cylindrical Surface Pasting   (Site not responding. Last check: 2007-09-17)
For cylindrical pasting, we only have an identification of the first two rows of the feature control points with the base surface.
Next, we map the L1 layer to approximate C1 continuity, which in standard pasting required the displacement vectors for the L1 layer control points to be set to zero.
With cylindrical pasting, we only have the boundaries of the cylinder's domain associated with the base domain.
www.cgl.uwaterloo.ca /Projects/Splines/pasting/cylindrical   (1121 words)

 Optimal Cylindrical Antenna Arrays Veli Voipio (ResearchIndex)   (Site not responding. Last check: 2007-09-17)
Abstract: Introduction The cylindrical arrays are an attractive subject of study for cellular base station antennas, particularly when omnidirectional scanning is needed.
Cylindrical arrays have also some 3-D capability, but that was not taken into account in these calculations.
This is a research for the optimal cylindrical array.
citeseer.ist.psu.edu /676510.html   (253 words)

 Exploratorium: Science Snacks: Cylindrical Mirror
A cylindrical mirror can produce images that are flipped upside down and images that are not reversed.
The image you see in a cylindrical mirror depends on the orientation of the mirror and the distance between you and the mirror.
When you look into a cylindrical mirror with the axis of the mirror horizontal and with your face a foot or more away from the mirror, your image is upside down.
www.exploratorium.edu /snacks/cylindrical_mirror.html   (1131 words)

 Piece-Wise Cylindrical Section Modeling   (Site not responding. Last check: 2007-09-17)
However, it is possible to approximate non-uniform bore shapes with cylindrical sections, as illustrated in Fig.
In this way, a cylindrical pipe is represented by a transmission matrix, defined by its particular length and radius.
Because the characteristic wave impedance of a cylindrical pipe is real, these expressions apply to both time- and frequency-domain wave variables.
www.music.mcgill.ca /~gary/614/week9/pipesections.html   (570 words)

 Dorlands Medical Dictionary   (Site not responding. Last check: 2007-09-17)
Bence Jones cylinders,   cylindrical gelatinous bodies forming the contents of the seminal vesicles; called also Lallemand's, Lallemand-Trousseau, or Trousseau-Lallemand bodies.
a usually benign tumor of either apocrine or eccrine origin generally arising in early life as single or multiple nodules located on the scalp and less often on the face and extremities, and consisting of cylindrical epithelial masses containing small basophilic and larger pale-staining cells surrounded by pink hyaline sheaths.
Multiple lesions, which affect females more often and may completely cover the scalp (hence the descriptive term turban tumor), are usually dominantly inherited, and may also be associated with multiple trichoepitheliomas.  2.
www.mercksource.com /pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_c_70zPzhtm   (1564 words)

 Alcoa -- Product Catalog: Aluminium cylindrical stepped lighting columns with single bracket - Aluminium lightpoles for ...   (Site not responding. Last check: 2007-09-17)
Because these lighting columns often are placed alongside provincial and national roads at some distance from the roadway, it is necessary to place the luminaire at a distance from the column, i.e.
These cylindrical columns are manufactured from a seamless aluminium tube and can be supplied in all kinds of variants and steps.
The columns are made up of a cylindrical part with a door section.
www.alcoa.com /global/en/products/product.asp?prod_id=1486   (255 words)

 Air Bearings Cylindrical
Often referred to as "Z-Theta", this denotes translating motion in the Z-Axis and rotational motion in the theta direction.
The cylindrical "Z-Theta" bearing shown above is used as a grinding spindle.
The assembly shown at right consists of a linear thrust surface, a cylindrical surface, and a spherical surface.
www.specialtycomponents.com /nf/cylindrical.htm   (171 words)

 The German Cylindrical UFO: An interview.   (Site not responding. Last check: 2007-09-17)
He shot at full speed in that direction and found himself face to face with a cylindrical object, more than three hundred feet long with some openings along its side, and fitted with long antennae placed in front up to about halfway along its length.
It is likely that the German cylindrical (or cigar-shaped) craft had large photon reflectors mounted in an opening at the tail end of the ship.
CIC Veteran Cornwell: We were told that the Germans designed it to go to the moon and that they had flown all of the operational craft which had been kept at the plant to South America and Africa.
netowne.com /naziufos/boblee   (1389 words)

 Cyj: cylindrical joint definition   (Site not responding. Last check: 2007-09-17)
A cylindrical joint is a constraint element that allows the relative displacement of two bodies along a specific body attached axis, together with relative rotation about the same axis.
representation depicts the cylindrical joint as a symbol centered at the point that defined the element.
representation depicts the cylindrical joint as two triads sharing a common origin and oriented according to the configuration of the two bodies connected to the joint.
www.ae.gatech.edu /people/obauchau/manual/Cyj.html   (299 words)

 Example: A cylindrical robot
Let us consider the robot with three joints presented in figure 6.1, which provide motion in a cylindrical workspace.
The base of the robot can be modelled with a cylindrical body and its arm is assumed to be beam-shaped.
The special choice of the reference system and the rotational symmetry of the cylindrical body leads to a tensor with moments of inertias only appearing on the main diagonal; no moments of deviation occur.
prt.fernuni-hagen.de /lehre/KURSE/PRT001/course_main/node29.html   (958 words)

 Cylindrical projection
In general, given a cylindrical surface and an arbitrary projector position and orientation angle, the projected image as it appears on the cylindrical surface will look distorted, see figure 1 and 2.
In addition there may be parts of the image plane that do not lie on the cylindrical surface (shown in grey below) and it may be necessary to tile the images and therefore edge blend between adjacent images (shown in blue below).
It is possible to warp the projected image so that the image as it appears on the cylindrical surface looks undistorted to an observer at the center of the cylinder.
astronomy.swin.edu.au /~pbourke/projection/cylinder   (377 words)

 Calc III Lab: Surfaces in Cylindrical Coordinates   (Site not responding. Last check: 2007-09-17)
Many objects have cylindrical symmetry (for example, grain silos, water towers, footballs, soda cans, and the cooling towers of a nuclear power plant).
Therefore it is natural to use cylindrical coordinates to analyze these objects mathematically.
The image of the surface in cylindrical coordinates therefore has tangent vectors given by DC u and DC v.
www.geom.uiuc.edu /~thurman/calcIII/Lab12/surfaces.html   (203 words)

 The Panorama Factory Forum: Cylindrical vs. Spherical Projection
In cylindrical projection, the image is first mapped onto the surface of a cylinder and then the cylinder is unrolled.
Cylindrical projection cannot reproduce the full 180 degree vertical field of view from floor to ceiling without using an infinitely tall piece of paper!
When preparing images for printing or for online display as a "flat 360," the choice of cylindrical or spherical reprojection is largely an esthetic choice.
www.panoramafactory.com /cgi-bin/discus/show.cgi?tpc=10&post=172   (334 words)

 Determination of the Shear Impedance of Viscoelastic Liquids Using Cylindrical Piezoceramic Resonators   (Site not responding. Last check: 2007-09-17)
The resonator was viscoelastically loaded on the outer cylindrical surface.
Using theoretical formulas established and the results of the experiments performed, the shear storage modulus μ and the viscosity η for various liquids (e.g., epoxy resins) were determined.
Moreover, the authors derived for cylindrical resonators a formula that relates the shift in resonant frequency to the viscosity of the liquid.
www.ieee-uffc.org /archive/uffc/trans/Toc/abs/03/t0330230.htm   (237 words)

 Pseudo-spectral Analysis of Radially-Diagonalized Maxwell's Equations in Cylindrical Co-ordinates
A cylindrical disk, characterized by the radius a and the periodicity length Lz, defines the fundamental cell in our problem.
In free space outside the disk, the fields are xpanded in terms of the closed-form eigensolutions of the Maxwell’s equations in cylindrical co-ordinates.
In order to uniquely determine the involved unknown coefficients, the solutions in the interior- and exterior domains are matched on the disk’s bounding surface.
www.opticsexpress.org /abstract.cfm?URI=OPEX-11-23-3048   (635 words)

 Cylindrical Connectors meet non-magnetic specifications., Amphenol Corp., Amphenol
Sidney, NY, June 2005 -- Amphenol Industrial Operations, a manufacturer of high reliability connectors and interconnection systems for the industrial markets, has modified its Amphe-Lite series of connectors to meet non-magnetic specifications for MRI or other applications requiring the use of a non-magnetic interconnect.
Amphenol Industrial Operations, headquartered in a 675,000 square foot facility in Sidney, NY, provides a full range of high reliability connectors and interconnection systems specifically for the industrial markets including base stations, rail/mass transit, process control, automotive manufacturing, heavy equipment, and petrochemical/power generation.
Aug 11, 2005 - Anti-Vibration Cylindrical Connector prevents decoupling.
news.thomasnet.com /fullstory/464903/rss/772   (857 words)

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