Factbites
 Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: Mach band


Related Topics

In the News (Sat 26 Jul 08)

  
  Ernst Mach - Plagiarism on Wikipedia
Ernst Mach (February 18, 1838 – February 19, 1916) was an Austrian physicist and philosopher and is the namesake for the "Mach number" (aka Mach speed) and the optical illusion known as Mach bands.
Mach returned to the University of Vienna as professor of inductive philosophy in 1895, but he suffered a stroke two years later and retired from active research in 1901, when he was appointed to the Austrian parliament.
Mach's paper on this subject was published in 1877 and correctly describes the sound effects observed during the supersonic motion of a projectile.
www.wikipedia-watch.org /plagiarism/0648.html   (794 words)

  
 Highbeam Encyclopedia - Search Results for mach
Mach number Ratio of the speed of a body or fluid to the local speed of sound.
Mach, one of the leaders of modern positivism, did his major work in the philosophy of science.
MACH Announces Agreement to Acquire Cibernet; MACH and Cibernet join forces to form the leading global clearing and settlement partner for mobile based transactions.
www.encyclopedia.com /searchpool.asp?target=mach   (726 words)

  
  Ernst Mach
Mach's paper on this subject was published in 1877 and correctly describes the sound effects observed during the supersonic motion of a projectile.
Mach deduced and experimentally confirmed the existence of a shock wave which has the form of a cone with the projectile at the apex.
Mach returned to the University of Vienna as professor of inductive philosophy in 1895, but he suffered a stroke two years later and retired from active research in 1901, when he was appointed to the Austrian parliament.
www.ebroadcast.com.au /lookup/encyclopedia/er/Ernst_Mach.html   (336 words)

  
 Ernst Mach - Wikipedia, the free encyclopedia
Mach deduced and mathematically confirmed the existence of a shock wave which has the form of a cone with the projectile at the apex.
Mach developed a philosophy of science which was influential in the nineteenth and twentieth centuries.
Mach held that scientific laws are summaries of experimental events, constructed for the purpose of human comprehension of complex data.
www.wikipedia.org /wiki/Ernst_Mach   (782 words)

  
 Encyclopedia: Mach band   (Site not responding. Last check: 2007-10-22)
Ernst Mach Ernst Mach (February 18, 1838 – February 19, 1916) was an Austrian-Czech physicist and philosopher and is the namesake for the Mach number and the optical illusion known as Mach bands.
It is theorised that the Mach band may be responsible for moths' attraction to ambient objects.
It is theorised that the Mach band may be responsible for (Typically crepuscular or nocturnal insect having a stout body and feathery or hairlike antennae) moths' attraction to ambient objects.
www.nationmaster.com /encyclopedia/Mach-band   (542 words)

  
 Encyclopedia: Ernst Mach   (Site not responding. Last check: 2007-10-22)
Mach number (Ma) (pronounced as mack in International English or mock in the American English) is defined as a ratio of speed to the speed of sound in the medium in case.
Mach number, in fluid mechanics, is the ratio of the velocity of a fluid to the velocity of sound in that fluid, named after Ernst Mach (1838-1916), an Austrian physicist and philosopher.
Mach's principle, in cosmology, is the hypothesis that the inertial forces experienced by a body in nonuniform motion are determined by the quantity and distribution of matter in the universe.
www.nationmaster.com /encyclopedia/Ernst-Mach   (1018 words)

  
 Aspen no. 8, item 9: Mach Bands
Mach's subsequent writings were deeper investigations into this relationship between the subjective sensations of the beholder and the nature and measurements of the thing observed.
Mach's experiments and theories had been well known and much debated when, around 1880, physical science was rocked and subsequently redefined by the failure of the Michelson-Morley experiment, an attempt to measure the speed of light.
It is not improbable that Mach himself would have discovered the theory of relativity, if, during the time that his mind was in its prime, physicists had been concerned with the importance of the problem of the constancy of the speed of light.
www.ubu.com /aspen/aspen8/machBands.html   (6728 words)

  
 Practical applications of Mach band theory in thoracic analysis.   (Site not responding. Last check: 2007-10-22)
Practical applications of Mach band theory in thoracic analysis.On the basis of their appearance, the bands are defined as positive (white) or negative (fl).
Mach bands represent optical psychophysiologic edge-enhancement phenomena produced by means of lateral inhibition in the retina of the eye.
Visualization of Mach bands depends on a set of variables that involve primarily the contour and optical density of a structure at an interface relative to that of its surround.
www.pdg.cnb.uam.es /UniPub/iHOP/gp/8972208.html   (166 words)

  
 Practical Applications of Mach Band Theory in Thoracic Analysis -- Chasen 219 (3): 596 -- Radiology
The positive Mach band (arrowheads) produced at the point of maximum concavity (middle arrows in a) is somewhat difficult to appreciate, not because of insufficient contrast at the points of concavity but because of insufficient contrast secondary to superimposition of the opacity of the knob.
Note the change in the perception of the Mach band along the contour of the interface at each of the arrows as the overall contrast is altered by the increasing opacity of the lung and its overlapping surround in the craniocaudal direction.
The negative Mach band (arrows) on the outer aspect of the stripe is formed by convex soft tissue of the mediastinum at an interface with the concave air of the lung.
radiology.rsnajnls.org /cgi/content/full/219/3/596   (9897 words)

  
 Mach bands - Psychology Wiki   (Site not responding. Last check: 2007-10-22)
Mach bands is the name given to the light and dark zones seen at the onset and offset, respectively, of luminance gradients that lack any photometric basis [1](Figure 1).
A more recent interpretation of Mach bands is that the effect closely parallels the accounts of the simultaneous brightness contrast and Cornsweet effects (Lotto, RB, Williams SM, Purves D 1999 a,b) (see DEMONSTRATIONS #02-05 and #07) [2].
The empirical explanation of Mach bands is the same, in principle, as the explanations of simultaneous brightness and Cornsweet effects.
psychology.wikia.com /wiki/Mach_band   (574 words)

  
 Mach - Wikipedia, the free encyclopedia
GNU Mach The microkernel on which GNU Hurd is based
Mach kernel, an operating systems kernel technology used in Mac OS X
Mach Five, the name of the car in the animated TV series Speed Racer
en.wikipedia.org /wiki/Mach   (127 words)

  
 REF Events : Journal Watch
Mach bands are psychophysiologic optical phenomena that occur at borders of tissues of differing densities, due to lateral inhibition of the retina.
The classic examples of Mach bands on a chest radiograph are the para-aortic and paraspinal lines.
This long article discusses the physical principles behing Mach bands, the different types of bands seen normally and their applications in the interpretation of chest radiographs.
www.refindia.net /ref/activities/jw/0709.htm   (279 words)

  
 Highbeam Encyclopedia - Search Results for band
band A vertical stripe on a polytene chromosome that results from the specific association of a large number of chromomeres.
Bands may be integrated into a larger community or tribe.
A big band performs swing music and has about 16 musicians in four sections: trumpets, trombones, saxophones and a rhythm section.
www.encyclopedia.com /SearchResults.aspx?Q=band&StartAt=11   (845 words)

  
 Ernst Mach Summary
Mach is generally credited with establishing the study of the philosophy of sciences as a separate discipline.
The bulk of Mach's experimental work was in the field of aerodynamics; he was the first to note the changes in the movement of air around an object as it approached the speed of sound.
Ernst Mach (February 18, 1838 – February 19, 1916) was an Austrian-Czech physicist and philosopher and is the namesake for the "Mach number" (aka Mach speed) and the optical illusion known as Mach bands.
www.bookrags.com /Ernst_Mach   (1900 words)

  
 Mach bands as empirically derived associations -- Lotto et al. 96 (9): 5245 -- Proceedings of the National Academy of ...   (Site not responding. Last check: 2007-10-22)
Salience of Mach bands as a function of the relative linearity of the luminance gradient stimulus [generated here by a square occluder interposed between the light source and the surface on which the shadow is cast, as indicated (Top); see Methods for details].
The perception of Mach bands elicited by a given gradient is changed by information in the stimulus that alters the probability of the source being a curved or a flat surface.
As indicated in Table 1, subjects invariably perceived the Mach bands associated with the curved surface to be more salient than the bands associated with the penumbra of the shadow cast on the flat surface.
www.pnas.org /cgi/content/full/96/9/5245   (3119 words)

  
 [No title]   (Site not responding. Last check: 2007-10-22)
Mach bands, which normally occur at the edges of ramp modulations of luminance, are demonstrated to occur in fullwave stimuli that have ramp modulations of contrast while maintaining constant expected luminance.
Both fullwave Mach-band stimuli exhibit perceptual Mach bands that are decreases or increases in apparent texture contrast with no concommitant change in apparent brightness.
The perceived contrast bands in fullwave Mach stimuli and the brightness bands in a conventional luminance Mach-band stimulus have approximately the same magnitude.
www.socsci.uci.edu /imbs/tr/abs/1995/mbs95_24.html   (213 words)

  
 An empirical basis for Mach bands -- Lotto et al. 96 (9): 5239 -- Proceedings of the National Academy of Sciences
A band of illusory lightness is apparent at position 2, as is a band of illusory darkness at position 3.
Mach ruled out the possibility that these illusions arise from movement of the disk by observing that the light and dark bands are equally apparent in photographs, as is evident here.
Such stimuli elicit the perception of Mach bands, as can be appreciated by examining the computer-generated stimulus shown in B (the photometric measurement in C indicates that the bands seen in response to viewing the stimulus in B are entirely illusory).
www.pnas.org /cgi/content/full/96/9/5239   (3362 words)

  
 Cervical burnout and Mach band: two shadows of doubt in radiologic interpretation of carious lesions.   (Site not responding. Last check: 2007-10-22)
Cervical burnout and Mach band: two shadows of doubt in radiologic interpretation of carious lesions.The factors that produce cervical burnout images in the film emulsion and Mach band effects in the retinal receptors have been discussed.
Not every observer has the same ability to perceive Mach bands, and perception is modified by projection, contour, and film and object density.
Mach bands, produced by lateral inhibition of neural receptors in the eye, are optical illusions that may appear in the dentin along the proximal DEJ, or in dentinal peaks bounded by occlusal and proximal enamel.
www.pdg.cnb.uam.es /UniPub/iHOP/gp/4447745.html   (151 words)

  
 Casestory - Liberacion On Tour with Mach SlingShot System
Liberacion, a very popular Mexican band that has been touring Mexico, the USA and South America for the past 25 years, is taking on a completely new image with the addition of younger musicians and two new front men.
The first concert in which Liberacion used their new Mach system was in the city of Monterrey in the northern part of Mexico.
Mach clearly demonstrated that the SlingShot system is not only top quality but highly competitive with other like systems in the professional market.
www.martinpro.com /casestory/casestory.asp?id=412&printable=1   (684 words)

  
 Mach Orange Periapt
Mach Orange "Perverts" Was founded in 2002 By Sam Elza on Guitar, Bobby Dubray on Lead Vocals, and Jay Schumaker on Drums, Which quickly split after learning of Jay's Suicide.
Autumn the band's Drummer, Previously the band's promotional manager, the band while in process of recruiting a new drummer were outside one day and from the house heard someone playing the drums and playing very well.
Sam the band's Lead guitarist, has been playing guitar for the since the summer of 1987 after having played violin for many years before that Sam was more than accostomed to what it was going to take to be good at a stringed instrument.
www.webspawner.com /users/ludovico77/machorangeperia.html   (431 words)

  
 Mach One   (Site not responding. Last check: 2007-10-22)
Mach is a kernel, BSD is an OS.
The Mach Five is the racing car Speed Racer drives in the anime series of the same name.
In the original 1966 series, the Mach Five is a white racing car with an 'M' written on its hood.
www.wwwtln.com /finance/119/mach-one.html   (690 words)

  
 Mach's Band and Hermann's Grid: Things 'aint always what they seem   (Site not responding. Last check: 2007-10-22)
One of the most powerful illusions that can be explained by the receptive field properties of retinal ganglion cells are Mach bands, named after a 19th century Austrian physicist.
Mach bands are illusory strips of light and dark areas adjacent to a light/dark edge and which enhance the contrast of the edge which allows the visual system to separate areas into different objects.
Lightness constancy is the ability of the visual system to tell use about the lightness of an object regardless of the illumination conditions and lightness contrast is an effect where the same object lightness can appear to differ depending upon the surround lightness.
www.brad.ac.uk /acad/lifesci/optometry/resources/modules/stage1/pvp1/Spatial.html   (3007 words)

  
 MachBell
But the JPP record that I feel was there most noteworthy, was the band’s very last recording, the raw and rocking “Once a Rocker, Always a Rocker.” This album featured former Thundertrain vocalist and Boston native Cowboy Mach Bell.
So to commemorate the twenty one year anniversary of the end of the JPP version Cowboy Mach Bell, I caught up with Mach and asked him to give us some insight into his time as vocalist for the band.
Mach 5 will start playing rock'n'roll shows up here in New England this month and I plan to cut a record with the band later this year.
www.glam-metal.com /machbell.html   (1363 words)

  
 Logarithmic 3-Band Color Encoding: ...
Logarithmic multiband color encoding is a pseudocolor scale in which three distinct color bands are defined to correspond to major, minor, and trace constituent levels, with a lower threshold of 0.001 used for the trace band since zero must be excluded from a logarithmic scale.
Within each band, the intensity is encoded logarithmically, and the color runs from a pure primary color at the low end through pastel colors at the high end, as illustrated in Figure 4.
Additional bands could be added if needed to extend the range of the depiction of trace constituents below 0.001 mass fraction, in which case the secondary colors of yellow, magenta, and cyan could be used with their pastels to encode additional decades of k-value or concentration.
www.nist.gov /lispix/doc/references/log-3-band/3-band-paper.html   (5108 words)

  
 www.myspace.com/machfox
Mach FoX is the quintessential Electro-Rocker, a glam punk who digs the roots, a true believer in the machine backbeat.
As Mach Fox is doing most everything right -- not the least of which is creating a niche as a showman who looks more like a life-size space movie action figure than a rock star -- it's a wonder he's not better known outside the electronic music scene.
Mach (or Mark, as he's known to his friends) would also be a hit with fans on the indie rock scene.
www.myspace.com /machfox   (1438 words)

  
 8.2 Mach Band Illusion
Note that the gray level bands, both in the LUT window and in the image window, appear to be shaded or have a "Venetian Blind" appearance.
Despite their appearance, the bands each consist of only one gray level.
The profile shows that the intensity across any band is constant, yet each band appear darker on the left side than on the right.
www.nist.gov /lispix/imlab/illusions/machband.html   (489 words)

  
 CD Baby: MACH 5: Meet Mach 5 - from rockandrollmark   (Site not responding. Last check: 2007-10-22)
Mach 5 stars Boston rock vet Mach Bell, who fronted the primo '70s glam/hard rock band Thundertrain and later sang for the Joe Perry Project.
Mach has toured and performed onstage with a wide range of artists that include: Thin Lizzy, Joan Jett, The Dead Boys, Greg Allman, David Johansen, Alex Chilton, Cheap Trick, Huey Lewis, Nazareth, The Runaways, the Romantics, The Ramones, Bo Diddley, the Stray Cats, and The Cars.
Mach 5 are, in my opinion, a combination of 70's rock, modern bar rock, punk, classic rock with a bit of sleaze and maybe even some garage rock thrown in as well.
cdbaby.com /cd/mach5/from/rockandrollmark   (2020 words)

  
 Perception   (Site not responding. Last check: 2007-10-22)
Mach bands are illusory bright and dark bands seen where a luminance plateau meets a ramp, as in half shadows or penumbras.
It has previously been shown that Mach bands are attenuated by placing stimuli, such as bars, nearby.
It was shown in an experiment in which Mach-band attenuation for bar and Craik - O'Brien stimuli was compared that they are equally effective in attenuating Mach bands.
www.perceptionweb.com /abstract.cgi?id=p250425   (175 words)

  
 Illusions   (Site not responding. Last check: 2007-10-22)
A couple of illusions of the visual system are illustrated well with NIH Image: Mach Bands, and the brightness vs. background illusion.
The Mach bands are caused by the abrupt intensity change at the edges, which the eye further enhances.
Bands appear darker on the left and brighter on the right although they are of uniform color.
rsb.info.nih.gov /nih-image/more-docs/Tutorial/Illusions.html   (542 words)

Try your search on: Qwika (all wikis)

Factbites
  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.