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Alan Letton - One of the best experts on this subject based on the ideXlab platform.

  • bisphenol a Bimodal epoxy resins part i the dynamic mechanical characterization of a 6300 340 22 500 weight average molecular weight System
    Polymer Engineering and Science, 1994
    Co-Authors: Gale A. Holmes, Alan Letton
    Abstract:

    By using an advanced epoxy resin of 22,500 weight average molecular weight two Bimodal Systems of 6300 weight average molecular weights were prepared. By altering the curing procedure normally used to cure epoxy resins and high molecular weight resins we have succeeded in minimizing the difficulty associated with preparing Bimodal epoxy resin Systems. The ultimate Tg of these Bimodal Systems is associated with the phase morphology and controlled by the curing conditions employed. For the completely phase separated Bimodal System a Tg of 473 K is reported and for the partially phase separated System a Tg of 466 K is reported. Equations were developed for predicting the equilibrium shear modulus of these Bimodal Systems. Theoretical predictions based on these equations were found to be consistent with experimental results.

  • bisphenol a Bimodal epoxy resins part i the dynamic mechanical characterization of a 6300 340 22 500 weight average molecular weight System
    Polymer Engineering and Science, 1994
    Co-Authors: Gale A. Holmes, Alan Letton
    Abstract:

    By using an advanced epoxy resin of 22,500 weight average molecular weight two Bimodal Systems of 6300 weight average molecular weights were prepared. By altering the curing procedure normally used to cure epoxy resins and high molecular weight resins we have succeeded in minimizing the difficulty associated with preparing Bimodal epoxy resin Systems. The ultimate Tg of these Bimodal Systems is associated with the phase morphology and controlled by the curing conditions employed. For the completely phase separated Bimodal System a Tg of 473 K is reported and for the partially phase separated System a Tg of 466 K is reported. Equations were developed for predicting the equilibrium shear modulus of these Bimodal Systems. Theoretical predictions based on these equations were found to be consistent with experimental results.

Gale A. Holmes - One of the best experts on this subject based on the ideXlab platform.

  • bisphenol a Bimodal epoxy resins part i the dynamic mechanical characterization of a 6300 340 22 500 weight average molecular weight System
    Polymer Engineering and Science, 1994
    Co-Authors: Gale A. Holmes, Alan Letton
    Abstract:

    By using an advanced epoxy resin of 22,500 weight average molecular weight two Bimodal Systems of 6300 weight average molecular weights were prepared. By altering the curing procedure normally used to cure epoxy resins and high molecular weight resins we have succeeded in minimizing the difficulty associated with preparing Bimodal epoxy resin Systems. The ultimate Tg of these Bimodal Systems is associated with the phase morphology and controlled by the curing conditions employed. For the completely phase separated Bimodal System a Tg of 473 K is reported and for the partially phase separated System a Tg of 466 K is reported. Equations were developed for predicting the equilibrium shear modulus of these Bimodal Systems. Theoretical predictions based on these equations were found to be consistent with experimental results.

  • bisphenol a Bimodal epoxy resins part i the dynamic mechanical characterization of a 6300 340 22 500 weight average molecular weight System
    Polymer Engineering and Science, 1994
    Co-Authors: Gale A. Holmes, Alan Letton
    Abstract:

    By using an advanced epoxy resin of 22,500 weight average molecular weight two Bimodal Systems of 6300 weight average molecular weights were prepared. By altering the curing procedure normally used to cure epoxy resins and high molecular weight resins we have succeeded in minimizing the difficulty associated with preparing Bimodal epoxy resin Systems. The ultimate Tg of these Bimodal Systems is associated with the phase morphology and controlled by the curing conditions employed. For the completely phase separated Bimodal System a Tg of 473 K is reported and for the partially phase separated System a Tg of 466 K is reported. Equations were developed for predicting the equilibrium shear modulus of these Bimodal Systems. Theoretical predictions based on these equations were found to be consistent with experimental results.

Dieudonné Benjamin - One of the best experts on this subject based on the ideXlab platform.

  • Binaural hearing with a cochlear implant and a hearing aid Disentangling the underlying mechanisms and development of improved sound processing
    2020
    Co-Authors: Dieudonné Benjamin
    Abstract:

    A hearing aid restores hearing by sound amplification, while a cochlear implant is surgically implanted and restores hearing by electrical stimulation of the auditory nerve. An increasingly common solution to severe hearing loss is a 'Bimodal System': a cochlear implant in one ear and a hearing aid in the other. By giving the ability to hear with two ears - so-called 'binaural hearing' - this set-up could in theory allow its users to figure out where sounds come from, like normal-hearing people do. Unfortunately, in many cases this skill is almost completely absent in people with this Bimodal System. This is problematic, as they could otherwise disentangle different simultaneous sounds based on their perceived locations, for example to decipher speech in noisy environments, such as a party or a restaurant. This doctoral research is divided in two main parts. In the first part, we present a framework that we established to investigate the binaural mechanisms in speech perception. We apply it in particular to better understand the deficits in people with a cochlear implant and a hearing aid. In the second part, we present a novel sound processing algorithm to improve binaural hearing, which we called head shadow enhancement. We found that our algorithm could improve localization of sounds and speech understanding in noise for Bimodal listeners.status: accepte

  • Binaural hearing with a cochlear implant and a hearing aid: disentangling the underlying mechanisms and development of improved sound processing
    2020
    Co-Authors: Dieudonné Benjamin
    Abstract:

    A hearing aid restores hearing by sound amplification, while a cochlear implant is surgically implanted and restores hearing by electrical stimulation of the auditory nerve. An increasingly common solution to severe hearing loss is a 'Bimodal System': a cochlear implant in one ear and a hearing aid in the other. By giving the ability to hear with two ears - so-called 'binaural hearing' - this set-up could in theory allow its users to figure out where sounds come from, like normal-hearing people do. Unfortunately, in many cases this skill is almost completely absent in people with this Bimodal System. This is problematic, as they could otherwise disentangle different simultaneous sounds based on their perceived locations, for example to decipher speech in noisy environments, such as a party or a restaurant. This doctoral research is divided in two main parts. In the first part, we present a framework that we established to investigate the binaural mechanisms in speech perception. We apply it in particular to better understand the deficits in people with a cochlear implant and a hearing aid. In the second part, we present a novel sound processing algorithm to improve binaural hearing, which we called head shadow enhancement. We found that our algorithm could improve localization of sounds and speech understanding in noise for Bimodal listeners.status: publishe

Pridmore, Ralph W - One of the best experts on this subject based on the ideXlab platform.

  • Complementary colors theory of color vision : physiology, color mixture, color constancy and color perception
    'Wiley', 2011
    Co-Authors: Pridmore, Ralph W
    Abstract:

    I describe complementary colors' physiology and functional roles in color vision, in a three-stage theory (receptor, opponent color, and complementary color stages). 40 specific roles include the complementary structuring of: S and L cones, opponent single cells, cardinal directions, hue cycle structure, hue constancy, trichromatic color mixture, additive/subtractive primaries, two unique hues, color mixture space, uniform hue difference, lightness-, saturation-, and wavelength/hue-discrimination, spectral sensitivity, chromatic adaptation, metamerism, chromatic induction, Helson-Judd effect, colored shadows, color rendering, warm-cool colors, brilliance, color harmony, Aristotle's flight of colors, white-black responsivity, Helmholtz-Kohlrausch effect, rainbows/halos/glories, dichromatism, spectral-sharpening, and trimodality of functions (RGB peaks, CMY troughs whose complementarism adapts functions to illuminant). The 40 specific roles fall into 3 general roles: color mixture, color constancy, and color perception. Complementarism evidently structures much of the visual process. Its physiology is evident in complementarism of cones, and opponent single cells in retina, LGN, and cortex. Genetics show our first cones were S and L, which are complementary in daylight D65, giving a standard white to aid chromatic adaptation. M cone later split from L to oppose the nonspectral (red and purple) hues mixed from S+L. Response curves and wavelength peaks of cones L, S, and (S+L), M, closely resemble, and lead to, those of opponent-color chromatic responses y, b, and r, g, a Bimodal System whose summation gives spectral-sharpened trimodal complementarism (RGB peaks, CMY troughs). Spectral sharpening demands a post-receptoral, post-opponent-colors location, hence a third stage.19 page(s

Ralph W Pridmore - One of the best experts on this subject based on the ideXlab platform.

  • complementary colors theory of color vision physiology color mixture color constancy and color perception
    Color Research and Application, 2011
    Co-Authors: Ralph W Pridmore
    Abstract:

    I describe complementary colors' physiology and functional roles in color vision, in a three-stage theory (receptor, opponent color, and complementary color stages). 40 specific roles include the complementary structuring of: S and L cones, opponent single cells, cardinal directions, hue cycle structure, hue constancy, trichromatic color mixture, additive/subtractive primaries, two unique hues, color mixture space, uniform hue difference, lightness-, saturation-, and wavelength/hue-discrimination, spectral sensitivity, chromatic adaptation, metamerism, chromatic induction, Helson-Judd effect, colored shadows, color rendering, warm-cool colors, brilliance, color harmony, Aristotle's flight of colors, white-black responsivity, Helmholtz-Kohlrausch effect, rainbows/halos/glories, dichromatism, spectral-sharpening, and trimodality of functions (RGB peaks, CMY troughs whose complementarism adapts functions to illuminant). The 40 specific roles fall into 3 general roles: color mixture, color constancy, and color perception. Complementarism evidently structures much of the visual process. Its physiology is evident in complementarism of cones, and opponent single cells in retina, LGN, and cortex. Genetics show our first cones were S and L, which are complementary in daylight D65, giving a standard white to aid chromatic adaptation. M cone later split from L to oppose the nonspectral (red and purple) hues mixed from S+L. Response curves and wavelength peaks of cones L, S, and (S+L), M, closely resemble, and lead to, those of opponent-color chromatic responses y, b, and r, g, a Bimodal System whose summation gives spectral-sharpened trimodal complementarism (RGB peaks, CMY troughs). Spectral sharpening demands a post-receptoral, post-opponent-colors location, hence a third stage. © 2011 Wiley Periodicals, Inc. Col Res Appl, 2011