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Träfflista för sökning "LAR1:umu srt2:(1970-1974)"

Sökning: LAR1:umu > (1970-1974)

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1.
  • Alm, Ove, et al. (författare)
  • A multiple coaxial wire for pressure calibration
  • 1974
  • Ingår i: Review of Scientific Instruments. - : American Institute of Physics (AIP). - 0034-6748 .- 1089-7623. ; 45:4, s. 594-595
  • Tidskriftsartikel (refereegranskat)abstract
    • A single wire containing several metals suitable for pressure calibration has been produced by extrusion. Coaxial combinations of Ce-Bi-TI and Ce-Bi-Ba have been prepared by the procedure described.
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2.
  • Alm, Ove, et al. (författare)
  • Thermal conductivity of KCl up to 19 kbar
  • 1974
  • Ingår i: Journal of Physics and Chemistry of Solids. - : Elsevier. - 0022-3697 .- 1879-2553. ; 35:3, s. 421-424
  • Tidskriftsartikel (refereegranskat)abstract
    • The pressure dependency of the thermal conductivity of KCl has been measured at room temperature up to 19 kbar. The high pressure tool was of the “belt” type and a solid medium was used. The specimen was cylindrical and was heated along its axis. The conductivity was found to increase linearly at a rate of (3·3 ± 0·3) per cent/kbar.
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3.
  • Andersson, Per, et al. (författare)
  • Pressure dependence of the thermal conductivity of an epoxy resin
  • 1973
  • Ingår i: Journal of Applied Physics. - : American Institute of Physics (AIP). - 0021-8979 .- 1089-7550. ; 44:2, s. 705-707
  • Tidskriftsartikel (refereegranskat)abstract
    • The pressure dependence of the thermal conductivity of Araldite has been determined in a cylindrical geometry at 300 K. The pressure coefficient was found to be independent of the percentage of hardener, the conductivity at 25 kbar being higher by the factor 1.75 ± 0.05 than at atmospheric pressure.
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4.
  • Andersson, Per, et al. (författare)
  • Pressure dependence of the thermal conductivity, thermal diffusivity, and specific heat of polyethylene
  • 1973
  • Ingår i: Journal of Applied Physics. - : American Institute of Physics (AIP). - 0021-8979 .- 1089-7550. ; 44:6, s. 2601-2605
  • Tidskriftsartikel (refereegranskat)abstract
    • The pressure dependence of the specific heat of high‐density polyethylene was determined from simultaneous measurements of thermal conductivity and diffusivity in a cylindrical geometry at 300 K and in the pressure range 0–25 kbar. The thermal conductivity and the diffusivity both increase strongly with pressure, the values at 25 kbar being higher by factors of 2.75 and 2.77, respectively, than those at atmospheric pressure. The specific heat decreases, most strongly so at low pressures, and its value at 25 kbar is 0.80 times that at atmospheric pressure. The thermal conductivity of low‐density polyethylene was determined as a function of pressure. Its value at 25 kbar was found to be 2.19 times that at atmospheric pressure. The difference in conductivity response to pressure between the two varieties is given a simple theoretical interpretation.
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5.
  • Andersson, Per, et al. (författare)
  • Specific heat of solids at high pressures from simultaneous measurements of thermal conductivity and diffusivity
  • 1972
  • Ingår i: High Temperatures-High Pressures. - 0018-1544 .- 1472-3441. ; 4:1, s. 101-109
  • Tidskriftsartikel (refereegranskat)abstract
    • A method of determining the specific heat of solids at high pressures, from simultaneous measurements of thermal conductivity and diffusivity in a cylindrical geometry, is described. Results are reported for polytetrafluoroethylene (Teflon) in the range 0-30 kbar at 300 K. With increasing pressure both the thermal conductivity and diffusivity increase strongly and approximately linearly, while the specific heat decreases, most strongly at low pressures.
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6.
  • Armelius, Bengt-Åke, 1944-, et al. (författare)
  • Detection of cue intercorrelation and cue validities in a multiple-cue judgment task with a suppressor cue
  • 1973
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • Arnelius, B., & Armelius, K. Detection of cue inter correlation and cue validities in a multiple-cue judgment task with a suppressor cue. Umeå Psychological Reports No. 74, 1973. - The subjects detection of cue intercor-relation, rij, and cue validities, rei, was tested after completion of a learning task with three levels of rij (.00, .40 and .80). The detection was tested by means of reproduction of rij in one test condition and rei in another. The reproduced rij values in the two redundant conditions closely matched the values of the learning tasks. There were, however, no differences among reproduced rij values which was explained as a positive set in the rij = .00 condition. The reproduced rij values were generally close to the rei values of the task with the exception of the non-valid cue for the rij = .00 condition, which was greatly overestimated. The conclusion was that the poor performance in suppressor variable tasks is due to the subjects inability to adjust the weights given to the cues, rather than to poor learning of rij and rei.
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7.
  • Backman, Jarl, 1941- (författare)
  • Preferensbedömningar av ljudintensiteter : en jämförelse mellan sensoriska och preferentiella bedömningstyper
  • 1971
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • Preference as a motivational concept was considered as an organismic disposition and a model which contained a region with three distinct points of preference was tested according to correspondence with.sensory data. The preference region was limited by an upper and a lower limit and in between there was a maximum point of preference. The experimental subjects were instructed to produce the three categories when stimuli consisted of simple sinusoidals.The experimental studies started with an exploratory experiment where the preference level was registered by a threshold technique and was followed by an experiment where the metric properties of the region were tested. The three categories were found to form an equidistant scale. The two following experiments could mostly be characterized as invariance studies över minor procedural changes. In the four experiments which followed,-changes in preference region were predicted from sensory laws e. g. temporal integration, equal loudnesscontours and adaptation. The predictions were all supported with minor exceptions.Finally, the independence assumption between the two ears was tested and the assumption was verified. The experimen-talresults showed that the preference region can bs considered as a limited part on the loudness continuum and that this region follows sensory or psychophysical principles of judgment.
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8.
  • Backman, Jarl, 1941- (författare)
  • Some common word attributes and their relations to objective frequency counts
  • 1974
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • A sample of 50 words taken from an American frequency count was used in obtaining subjective estimates of the following attributes: subjective frequency (SF), familiar­ity (F), associability (A), pronounciability (P), and comprehensibility (C). The last mentioned attribute had hitherto not been reported as scaleable with words pre­sented in singelitem form. The results showed among other things that all attributes, except A, were reliable and highly intercorrelatejd and an ANOVA also separated A from the other. Correlations with objective frequency counts, one American and two Swedish, were highest for SF, F, and P. Comprehensibility was judged to be a scaleable attri­bute according to the method used (magnitude estimation). This attribute seems, however, to measure something slightly different from what the other attributes do. Some hypotheseses for this are finally formulated.
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9.
  • Benckert, Lars, et al. (författare)
  • Determination of the photoelastic constants of NaCl, NaF, KCl, and ki by means of brillouin scattering
  • 1973
  • Ingår i: Physical Review B. - : American Physical Society. - 2469-9950 .- 2469-9969 .- 0556-2805. ; 8:12, s. 5888-5893
  • Tidskriftsartikel (refereegranskat)abstract
    • The photoelastic constants of NaCl, NaF, KCl, and KI have been determined by studying Brillouin scattering at 90° and 180°. The absolute intensities of the Brillouin doublets were obtained by comparing the Brillouin intensity with the intensity scattered by toluene, which has a well-known photoelastic coefficient. The results are NaCl: p11=0.115±0.009, p12=0.161±0.008, p44=−0.011±0.001; NaF:p12=0.123±0.009; KCl:p11=0.233±0.013, p12=0.169±0.008, p44=−0.026±0.002; and KI:p11=0.208±0.012, p12=0.166±0.008, p44=−0.011±0.001.
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10.
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  • Resultat 1-10 av 109
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