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  • SAGE Publications  (3)
  • 2000-2004  (3)
  • 1
    Online Resource
    Online Resource
    SAGE Publications ; 2004
    In:  Multiple Sclerosis Journal Vol. 10, No. 2 ( 2004-04), p. 243-244
    In: Multiple Sclerosis Journal, SAGE Publications, Vol. 10, No. 2 ( 2004-04), p. 243-244
    Type of Medium: Online Resource
    ISSN: 1352-4585 , 1477-0970
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2004
    detail.hit.zdb_id: 2008225-3
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  • 2
    Online Resource
    Online Resource
    SAGE Publications ; 2003
    In:  Perceptual and Motor Skills Vol. 96, No. 3 ( 2003-06), p. 759-771
    In: Perceptual and Motor Skills, SAGE Publications, Vol. 96, No. 3 ( 2003-06), p. 759-771
    Abstract: Prosodic expression is an important channel of emotional communication and can be assessed through computerized acoustical analysis. Fundamental Frequency (F 0 ) is the most commonly studied acoustic measure and considered the best index of perceived pitch. In this study, we examined two factors that can influence prosodic expression, sex and emotion type, A special feature is the use of a neutral expression as a control measure. We also described procedures for eliciting posed prosodic expression via an experimental task from the New York Emotion Battery. Subjects were healthy men ( n=10) and women ( n=9), matched for. age ( M = 29.2 yr.) and education ( M= 15.6 yr). Subjects were asked to intone neutral-content sentences with happy, sad, and neutral prosody. F 0 mean and standard deviation were measured using the Computerized Speech Lab program. Initial findings indicated that women produced significantly higher F 0 values than did men and that happy sentences were produced with significantly higher F 0 values than were sad sentences. When semitone conversions were applied and neutral prosody was subtracted out, differences remained for emotion type but not for sex. Findings are discussed in terms of implications for the assessment and treatment of prosody in clinical populations.
    Type of Medium: Online Resource
    ISSN: 0031-5125 , 1558-688X
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2003
    detail.hit.zdb_id: 2066876-4
    SSG: 5,2
    SSG: 7,11
    SSG: 31
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  • 3
    Online Resource
    Online Resource
    SAGE Publications ; 2001
    In:  High Performance Polymers Vol. 13, No. 2 ( 2001-06), p. S123-S136
    In: High Performance Polymers, SAGE Publications, Vol. 13, No. 2 ( 2001-06), p. S123-S136
    Abstract: The role of cyclization in polycondensations is discussed for two different scenarios: thermodynamically-controlled polycondensation (TCPs) on the one hand and kinetically-controlled polycondensations (KCPs) on the other. The classical Carothers–Flory theory of step-growth polymerization does not include cyclization reactions. However, TCPs involve the formation of cycles via ‘back-biting degradation’, and when the ring–chain equilibrium is on the side of the cycles the main reaction products of the TCP will be cyclic oligomers. Two groups of examples are discussed: polycondensations of salicyclic acid derivatives (e.g. aspirin) and polycondensations of dibutyltin derivatives with long α-, ω-diols or dicarboxylic acids. Furthermore, various kinetically-controlled syntheses of polyesters and polyamides were studied and carefully optimized in the direction of high molecular weights. High fractions of cyclic oligomers and polymers were found by MALDI-TOF mass spectrometry, and their fractions increased with optimization of the process for molecular weight. These results disagree with the Carothers–Flory theory but agree with the theoretical background of the Ruggli–Ziegler dilution method (RZDM). When poly(ether-sulfone)s were prepared from 4,4′-difluorodiphenylsulfone and silylated bisphenol-A two different scenarios were found. With CsF as catalyst at a temperature of more than 145°C cyclic oligoethers were formed under thermodynamic control. When the polycondensation was promoted with K 2 CO 3 in N-methylpyrolidone at ≤145°C the formation of cyclic oligoethers and polyethers occurred under kinetic control. A new mathematical formula is presented correlating the average degree of polymerization with the conversion and taking into account the competition between cyclization and propagation.
    Type of Medium: Online Resource
    ISSN: 0954-0083 , 1361-6412
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2001
    detail.hit.zdb_id: 1483713-4
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