Results 211 to 220 of about 31,428 (237)

Weber Fractions for Weight and Mass as a Function of Stimulus Intensity

The Quarterly Journal of Experimental Psychology Section A, 1987
Laboratory simulations of weightlessness have shown that the Weber fraction for mass is higher than that for weight in the range 1000–7000 g. Experiments in the weightless conditions of orbital and parabolic flight have found the same at the 50 g level.
H E, Ross, E E, Brodie
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Background-Adjusted Weber-Fechner Fraction Considering Crispening Effect

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2005
The recognition limit of luminance difference in the human visual system (HVS) has not been studied systematically. In this paper, surround adapted Weber-Fechner fraction is calculated based on the crispening effect. It is found that surround adapted fractions have reduced to 1/3 of the traditional Weber-Fechner fractions. As compared with Breitmeyer's
Dong-Ha Lee, Chan-Ho Han, Kyu-Ik Sohng
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Obtaining equal loudness contours from Weber fractions

The Journal of the Acoustical Society of America, 1995
An empirical equation from Riesz’s classic study on difference thresholds is treated in a new manner. Reformulating the expression for the Weber fraction allows one to account for the shape of the loudness function at different frequencies. Furthermore, the emerging loudness function unifies both the commonly used power and logarithmic laws of ...
Willy Wong, Kenneth H. Norwich
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Is The Weber Fraction a Function of Physical or Perceived Input?

Quarterly Journal of Experimental Psychology, 1964
It is well known that a given physical input (e.g. intensity of light or sound, length or weight of an object) does not always give rise to the same sensation. For example, arrow heads affect the perceived length of lines (Muller-Lyer illusion) and size affects the apparent weight of an object (size-weight illusion).
Helen E. Ross, R. L. Gregory
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Deriving the Weber fraction from loudness functions.

The Journal of the Acoustical Society of America, 1996
In a previous paper [W. S. Hellman and R. P. Hellman, J. Acoust. Soc. Am. 91, 2380(A) (1992)], Weber fractions for intensity discrimination were derived from their concomitant pure tone loudness functions in normal hearing. The calculational procedure employed a generalized McGill–Goldberg model. This work extends these findings to more frequencies, to
William S. Hellman, Rhona P. Hellman
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Where the action is: Weber fractions as a function of sound pressure at low frequencies

The Journal of the Acoustical Society of America, 1993
Weber fractions for sound intensity were measured for 70-, 100-, 200-, 1000-, and 10 000-Hz tone pulses at sound-pressure levels (SPLs) ranging from just above individual listeners’ absolute thresholds to near their highest tolerable SPLs, using a two-alternative forced-choice adaptive staircase technique governed by a 1-up, 3-down rule.
L M, Ward, K P, Davidson
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Weber Fraction Analogues in Social Perception: Further Investigation—Reply to a Comment

Perceptual and Motor Skills, 1963
The following points are in reply to Levy's comment (1962) on our recent note (Braun 8r Haven, 1962 ). First, we wish to make it clear thac we regard [he Levy work as a mosc ingenious and provocative atcernpt to apply the model of psychophysics to the field of social psychology.
G A, HAVEN, J R, BRAUN
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WEBER FRACTION ANALOGUES IN SOCIAL PERCEPTION: FURTHER INVESTIGATION—A COMMENT

Perceptual and Motor Skills, 1962
In the interests of clarification, I should like to point out chat Braun and Haven ( 1962), in reporting a significant difference in AM/M over different vaIues of M, present evidence bearing upon only one of the two criteria which I suggest (1760) for the existence of a Weber Fraction Analogue (WFA) in social perception.
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Standard fractionation low-dose proton radiotherapy for diffuse choroidal hemangiomas in pediatric Sturge-Weber syndrome

Journal of American Association for Pediatric Ophthalmology and Strabismus, 2013
Sturge-Weber syndrome is a nonhereditary congenital neurocutaneous syndrome characterized by leptomeningeal angiomatosis, facial nevus flammeus, and diffuse choroidal hemangioma, which when complicated by total retinal detachment, portend a poor prognosis. Management is often limited to salvage external beam irradiation.
Yoshihiro, Yonekawa, Shannon M, MacDonald, Yevgeniy, Shildkrot, Shizuo, Mukai   +3 more
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GC-MS characterization of n-hexane soluble fraction from dandelion (Taraxacum officinale Weber ex F.H. Wigg.) aerial parts and its antioxidant and antimicrobial properties

Zeitschrift für Naturforschung C, 2017
Abstract A comparative investigation of n-hexane soluble compounds from aerial parts of dandelion (Taraxacum officinale Weber ex F.H. Wigg.) collected during different vegetative stages was carried out. The GC-MS analysis of the n-hexane (unpolar) fraction showed the presence of 30 biologically active compounds.
Ivan, Ivanov, Nadezhda, Petkova, Julian, Tumbarski, Ivayla, Dincheva, Ilian, Badjakov, Panteley, Denev, Atanas, Pavlov   +6 more
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