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Topic: Tangent mechanism

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Tangent piano

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1698

Tangent piano

	Steerable truck for a railway vehicle - Patent 4295428
		A forced steering mechanism is attached to the truck connected to steer at least one of the axles and a pair of wheels.
		During the travel on tangent tracks, the relatively loose connection, to be described, between the car body and truck permits limited lateral movement of the car body and some self steering without actuating the forced steering.
		Although the truck is riding on a tangent track, it is undesirable to have the self steering effective in the presence of excessive lateral motion.
	www.freepatentsonline.com /4295428.html (3302 words)

	Constraint Singularities as Configuration Space Singularities
		We will be concerned mainly with mechanism properties that are determined by the geometry of the kinematic chain and the choice of the end-effector, but do not depend on the choice of actuators.
		We could say that the mechanism can be used both as a translational and as a rotational device and the transition between the two modes of operation may occur when the device goes through a constraint singularity.
		We can conclude that once the mechanism is assembled with zero platform orientation it can move only as a positioning device until it reaches one of the configurations defined by conditions (a) or (b).
	www.parallemic.org /Reviews/Review008.html (7499 words)

	Viscoelasticity. Viscoelastic materials
		The loss tangent of the copper- elastomer composite substantially exceeded the (lower) Voigt limit; the loss tangent of the copper-solder and copper-indium composites were close to the (upper) Hashin limit for two solid phases and one pore phase.
		The loss tangent, which is proportional to the ratio of energy dissipated to energy stored in a cycle of deformation, achieves a minimum value of about 0.01 at frequencies from 1 to 100 Hz.
		To compare, the loss tangent of quartz may be less than one part per million, in metals, from one part in ten thousand to 0.01, in hard plastics from 0.01 to 0.1, and in soft polymers, it may attain values greater than 1.
	silver.neep.wisc.edu /~lakes/VE.html (4066 words)

	Converting Magazine - Factors to consider in choosing shear blade profiles (Site not responding. Last check: 2007-11-06)
		As blade profile angles are gradually increased from "square" to acutely pointed, the material deflection path gradually changes from a vertical (shear stress) displacement to a lateral (tensile stress) displacement.
		Wrap versus tangent slitter geometry is very important in deciding which blade profile to use.
		Tangent slitting does not restrict free deflection of the web as it passes through the slitters, because there is greater available space between adjacent lower slitter rings.
	www.convertingmagazine.com /cgi-bin/searcharch.cgi?view=9_99_66 (1594 words)

	Comparison of Drive Technologies
		Slip fit mounting mechanisms are commonly employed to attach a gear to a telescope's axis of revolution.
		Adjustment of the gear's clutch mechanism may cause the gear's clutch pad to compress or decompress slightly, additionally altering the throat height alignment between the worm and the gear.
		However, a clutch mechanism is desirable since it serves the important function of preventing damage to the worm and gear should a power outage occur during a high speed slew or a physical obstruction be encountered while slewing.
	www.observatoryscope.com /drivesystems/drivecomparison.html (4150 words)

	SJSU Historical Keyboard Collection - Technological Evolution
		The clavichord, which dates from the 15th century, is mechanically simple: when a key is depressed a metal tangent in the back rises “teetor-totter” style and contacts the string to make a sound.
		As it’s name implies, the harpsichord, is in some respects a mechanized harp with keys and a mechanical action which replace human fingers that would normally pluck the strings.
		The Erard piano has a mechanism called the double escapement repetition, allowing the hammer to reset for another blow (to the string) by the slightest release of the key.
	www.music.sjsu.edu /links/piano/tech.html (831 words)

	Topology and Physics
		Note that in both cases C is, after transportation, in a well-defined tangent space because the parallelogram is closed.
		Such phenomena attract attention as a possible mechanism of the origin of induced gravitation and other gauge fields by interactions of matter fields.
		For the Lie group G, the symbol for the tangent bundle is TG, and it is simply the direct product of the Lie group G and the Lie algebra g.
	www.valdostamuseum.org /hamsmith/topolophys.html (2894 words)

	Geol 333 - Earthquake Mechanism Lab Exercise
		As explained in the text and in lecture, the P waves radiated from the double-couple mechanism of an earthquake are compressional in some directions and dilatational in others.
		The depth divided by the distance is the tangent of the inclination.
		Identify a strike-slip, a normal-fault, and a thrust-fault mechanism on the map.
	www.seismo.unr.edu /ftp/pub/louie/class/333/mechanism.html (988 words)

	PDM project
		The main idea is to start with a set of initial coefficients which live on the coarsest domain grid and then iterate upsampling, that is inserting new vertices in the grid, and local averaging on the corresponding coefficients to build complex geometrical shapes.
		The main advantage of the tangent scheme lies in the fact that no approximations of normals need to be calculated based on the coarse mesh.
		The normal is given for free because the control triangles are tangent to the subdivision surface.
	www.cs.kuleuven.ac.be /~nalag/research/projects/PDEvelyne.shtml (1208 words)

	World line - Wikipedia, the free encyclopedia
		World lines of a particle and an observer may be interconnected with the world line of a photon (the path of light) and form a diagram which depicts the emission of a photon by a particle which is subsequently observed by the observer (or absorbed by another particle).
		The sum of two vectors is again a tangent vector to some other curve and the same holds for multiplying by a scalar.
		Therefore all tangent vectors in a point p span a linear space, called the tangent space at point p.
	en.wikipedia.org /wiki/Worldline (2011 words)

	Calculus Applets at SLU
		The Slopes and Derivatives applet is a GeoGebra applet that traces out the slope of the line tangent to a curve as the base point is moved along the curve.
		The Partial Derivatives applet finds partial derivatives as tangent lines to the curves in slices where x or y is held constant.
		The applet Tangent Planes, connects the tangent lines of the x and y cross sections at a point to the tangent plane to the surface at that point.
	www.slu.edu /classes/maymk/MathApplets-SLU.html (2232 words)

	metric
		The metric is merely (!) a prescription or mechanism to extract 'lengths' and 'angles' from a pair of tangent vectors.
		For each pair of tangent vectors v,w based at the same point, g(v,w) is a kind of "dot product" of them.
		One manifestation of this feature is that in some tangent directions to space-time, the metric is 0.
	math.ucr.edu /home/baez/gr/metric.html (994 words)

	The Repair of an Altered Strike Mechanism on a Mechanical Clock
		The majority of rack-and-snail type strike mechanisms that have come by my bench for repairs have worked very well with the usual adjustments.
		If the gathering pallet tail were curved, as on Herschede clocks, the tangent off the curve at the point where the gathering pallet tail meets the rack stop pin needs to be at right angles to the rack circle radius.
		Similarly, the tangent off the curve of the rack stop pin, which is round, needs to be at right angles to the rack circle radius.
	www.abbeyclock.com /Strike.html (1590 words)

	Piano Lesson Tips Tuning Upright Piano Grand Piano
		The first major documents on the subjects from the west, however, date from the 16th century, with works such as Sebastian Virdung's Musica getuscht und ausgezogen (1511), grand piano upright he creation of the tangent piano, and the fortepiano, was a result of an attempt to remedy the lack of dynamics in harpsichord sound.
		Both the tangent piano and fortepiano offered a variety of sound that was appealing to the changes in classical music, which featured more expressiveness and intensity than the harpsichord could offer.
		The tangent piano's popularity lasted for such a short time, that very little music was written for it.
	www.piano-lesson.blogspot.com (5475 words)

	Parametric Cubic Curves
		The simplest of the cubic curves, the Hermite form, is defined by two endpoints and the tangent vectors at these endpoints.
		Unfortunately the magnitudes of the tangent vectors are somewhat of a mystery.
		Often the magnitudes need to be determined by trial and error, as a very large magnitude may be required to perturb the curve a small amount, or a small magnitude perturbs the curve too much.
	spec.winprog.org /curves (2373 words)

	shufflebrain-book09.html
		A mind, the theory asserts, is not specific molecules, particular cells, certain physiological mechanisms or whatever may serve as the mind's media.
		But the relationships are not reducible to a molecule, cell or mechanism any more than the message on a printed page is reducible to ink and paper.
		And when we investigate mind in molecules, on cells or via mechanisms, we have to be very careful about the words we chose to describe our results.
	www.indiana.edu /~pietsch/shufflebrain-book09.html (7609 words)

	Proxy Processing
		This is a very expensive mechanism both in terms of start-up costs and ongoing maintenance.
		And organizations are forced to make a trade-off between flexibility on the proxy forms and the expense and risk of more custom programming to meet unique customer needs.
		Tangent System's DocuTran II Proxy Application, built with the proven DocuTran II software, offers a superior solution that maximizes customer service while minimizing costs and errors.
	www.tangent-systems.com /proxy.html (477 words)

	Stereophile: Airtangent tonearm
		A tangent is a straight line touching a circle at one point only.
		More of interest here is another geometric fact: a tangent is always perpendicular to a radius of that circle.
		Simply put, if we keep the tip of the cantilever tangent to the record groove, the tip will always remain on the radius of the groove.
	www.stereophile.com /tonearms/443/index1.html (1154 words)

	Chapter 7. Gears
		Notice that in the imagined mechanism, the arm H is stationary and functions as a
		Hence, the imagined mechanism is an ordinary gear train.
		Apply the equation of velocity ratio of the ordinary gear trains to the imagined mechanism.
	www-2.cs.cmu.edu /People/rapidproto/mechanisms/chpt7.html (2159 words)

	MB Scientific supplying Cryogenic, Micro Manipulation, and Thin Film Research
		This scaled down and simplified version of tangent bar type goniometer is suitable for angular adjustment of various small X-ray optical elements such as mirrors etc. Because of its compactness and light weight, this goniometer can be used in various experimental arrangements.
		Coarse motion of is driven by the gear mechanism, while fine motion by the tangent bar.
		Resolution of both axes is enhanced mechanically by using additional worm and worm wheel mechanism.
	www.mbscientific.com.au /kohzu_xray.html (1177 words)

	Saddle-node
		The saddle-node bifurcation is fundamental to the study of nonlinear systems since it is one of the most basic processes by which periodic orbits are created.
		A saddle-node bifurcation is also referred to as a tangent bifurcation because of the mechanism by which the orbits are born.
		The birth of this stable period three orbit is clearly visible as the period three window in our numerically constructed bifurcation diagram of the quadratic map, Figure 2.14.
	cnls.lanl.gov /People/nbt/Book/node41.html (345 words)

	Digitizing letterforms
		Such a joining occurs when curves are connected in a manner such that their shared points have the same tangent.
		Connected quadratic curves have first degree continuity and tangent continuity if each curve point is on the line connecting the two flanking control points.
		This is commonly done to produce accented characters in cases where the font includes both the base character and the accent character.
	developer.apple.com /fonts/TTRefMan/RM01/Chap1.html (2454 words)

	P.P. Cook's Tangent Space
		On a different note, a while ago I attended the Winter School on the Attractor Mechanism in Frascati but was unable to write up much about it due to being very busy.
		This is the real weak point, since the mechanisms to get rid of electrons require either allowing their charge or their mass to dissipate over long time scales.
		Once this position is arrived at one might imagine a conformal rescaling of the metric down to zero, so that a future infinite region is made finite and may be attached to the finite cosmological singularity of some other universe.
	ppcook.blogspot.com (5822 words)

	Banchoff Applets
		The secant and tangent line applet shows how a sequence of tangent lines converges to the line tangent to a curve.
		The Linear Approximation applet explores the issue of the region where the tangent line can be used as a good approximation of a function.
		The Multivariable Linear Approximation explores the issue of the region where the tangent plane can be used as a good approximation of a function.
	www.slu.edu /classes/maymk/banchoff/index.html (1231 words)

	What is DocuTran?
		Where custom programming is needed, for unusual requirements or specialized hardware, the software provides an elegant mechanism for small custom routines to be integrated seamlessly into the software's normal operations.
		The required functionality and flexibility were never sacrificed or compromised in order to achieve this break-through in ease of development.
		Tangent Systems was founded on the conviction that custom software is bad business for vendor and user alike, and will seriously limit the growth of image document processing.
	www.tangent-systems.com /docutran_what.html (409 words)

	Integration
		The rate of change is the same as the slope of a line drawn tangent to the curve at that time.
		A series of these tangent lines can be used to "follow" th e function over time.
		If f'(t) is the change over time at a given time, and a is the time when the tangent is being drawn, then the equation of a tangent line at any time is f'(t)*(t-a)+f(a).
	www.shodor.org /appstchem/math/integrate/index.html (611 words)

	Baker Hughes INTEQ- AutoTrak System (Site not responding. Last check: 2007-11-06)
		The operator elected to drill a single 8.5” wellbore, changing drilling fluid systems at the reservoir entry point, to address a variety of issues and potential problems.
		The primary concern, from a fluids perspective, was to drill the 8.5” section, stabilizing all shales and clays exposed in both the tangent section and the reservoir, using water based fluid chemistry and technology.
		This was deemed essential as the drill in fluid formation protection mechanism relied heavily upon strict control of total fluid clay content.
	www.bakerhughes.com /inteq/Success/popup_perfflow.htm (196 words)

	Adjustment Processes: Solow vs. Harrod
		Thus, in Figure 2, we denote the slope of the tangent ray as r and the intercept on the vertical axis as w.
		This is exactly what we see when comparing the intercepts of the tangent lines in Figure 2.
		To see the factor market adjustment process more clearly, it is useful to translate Figure 2 into isoquant form, which we do in Figure 3.
	cepa.newschool.edu /het/essays/growth/neoclass/solowadjust.htm (1750 words)

	SIM AO Support - Mission
		The barycenter tangent frame is the mid-mission inertial reference frame defined by the instantaneous motion of the solar system barycenter.
		Model describing the time-evolving positions of all objects in the SIM Grid in the barycenter tangent frame, with Special and General Relativistic effects removed.
		Mechanism for transforming between the local instantaneous inertial reference frame and the barycenter tangent frame with Special and General Relativistic effects removed.
	planetquest.jpl.nasa.gov /SIM/ao_support/mission.html (702 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		This mechanism is based on a small stack machine, and on a DZ compiler.
		The DZ module is a remnant from an early attempt at compiling SN numerical to make it run faster.
		Returns a rational approximation of the derivative of the hyperbolic tangent of
	lush.sourceforge.net /lush-manual/9a0e3ffd.html (1311 words)

	Definition modes
		In the case of a geometric theorem where three lines always meet, such as the altitudes of a triangle, Cinderella's theorem checking mechanism ensures that the added point is considered incident to all three lines.
		If the point is on the conic itself then the unique tangent to the conic that passes through that point is constructed.
		Even more special, if the conic is a circle and the point lies on the circle then the tangent to the circle that passes through the point is constructed.
	www.unl.edu /tcweb/fowler/Documentation/Texts/DefinitionModes.html (2037 words)

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