234 research outputs found
Jean Golonka
No full textPhotograph - Jean Golonka (Fowlie) at high water on the Athabasca River, Athabasca, Albert
Emotion affects similarity via social projection.
No full textGiven the ubiquity of emotional experiences and the importance of similarity for understanding cognition and behavior, we examined how emotional valence affects perceived similarity. We
hypothesized an affective projection process, whereby the emotion evoked by a prime is projected onto and influences judgments of unrelated targets. Experiment 1 revealed that positive events were judged more likely after a positive prime (“respected”) than after a negative prime (“rejected”), thus demonstrating affective projection, whereas negative events were judged equally likely regardless of prime valence. Across five further experiments, positive primes increased similarity ratings of unrelated social categories (musicians & dentists), animals
(penguins & horses), and animal-like novel figures (greebles). In contrast, because emotions cannot be projected onto inanimate objects, judgments of artifacts (saws & spoons) and artifactlike
figures (yadgits) were unaffected. The influence of prime valence on target judgment was asymmetric, with positive primes affecting similarity but negative primes having no effect
Thematic thinking : the apprehension and consequences of thematic relations
No full textA thematic relation is a temporal, spatial, causal, or functional relation between things that perform complementary roles in the same scenario or event. For example, cows and milk are related by a production theme, and sails and anchors are related via a boating theme. Thematic relations are distinct from mere associations, scripts, and ad hoc categories. They also contrast and complement taxonomic (categorical) relations such as "fruits" and "furniture." Thematic relations and taxonomic relations arise from distinct processes, as evidenced by numerous neuropsychological and behavioral dissociations. Thematic relations may be apprehended uncontrollably and rapidly according to how frequently and recently they have been encountered. They exert profound effects on many core cognitive processes, including similarity, categorization, memory, language, inference, and analogy, and they exhibit robust processing differences across individuals and cultures. In sum, without such thematic thinking, models of cognition will remain categorically limited
IrO2-based thick-film resistors
No full textIrO2-based thick-film resistors were prepared and their microstructure/electrical property relationship was studied as a function of the firing temperature T-f and composition. The resistor microstructure exhibits a notable change, from a strongly segregated structure for T-f=750 degreesC, to a quasihomogeneous one when the firing temperature increases to T-f=850 degreesC. Likewise, a substantial change is observed in the sheet resistance (R-s) dependence on the volume fraction (v) of the conductive phase. For resistors prepared at T-f=750 degreesC the percolation power law R(s)approximate to(v-v(c))(-t) (where v(c) and t are the critical volume fraction and exponent, respectively) is observed, while samples fired at T(f)greater than or equal to850 degreesC follow the relation ln R(s)approximate toa(v-v(0)) where a and v(0) are proper constants. In addition, the slope of plot a is affected by the firing temperature T-f as well as by the measuring temperature at T<50 K. Very high temperature coefficients of resistance are measured at cryogenic temperatures. The longitudinal gauge factor values are in the range from 3 to 12.4 according to the resistor composition and firing temperature, with the highest values in samples fired at 950 degreesC with sheet resistance in the range from 10(4) to 10(7) Omega/square
Thematic relations affect similarity via commonalities
No full textThematic relations are an important source of perceived similarity. For instance, the rowing theme of boats and oars increases their perceived similarity. The mechanism of this effect, however, has not been specified previously. We investigated whether thematic relations affect similarity by increasing commonalities or by decreasing differences. In Experiment 1, thematic relations affected similarity more than difference, thereby producing a non-inversion of similarity and difference. Experiment 2 revealed substantial individual variability in the preference for thematic relations and, consequently in the non-inversion of ratings. In sum, the experiments demonstrated a non-inversion of similarity and difference that was caused by thematic relations and exhibited primarily by a subgroup of participants. These results indicate that thematic relations affect perceived similarity by increasing the contribution of commonalities rather than by decreasing the contribution of differences
Structural and electrical properties of perovskite ruthenate-based lead-free thick film resistors on alumina and LTCC
No full textCaRuO3 perovskite-based lead-free thick-film resistors (TFRs) were prepared on 96%-alumina and Low Temperature Co-fired Ceramic (LTCC) substrates. The microstructure evolution, possible interactions, and electrical properties of resistors were investigated. The hot and cold TCR values of all the resistors were measured in the temperature range (+20 to +120 ° C) and (+20 to -120 ° C), respectively. TFRs with 25% by vol. of CaRuO3 on alumina exhibit a sheet resistance R-s = 5 k Ohm/sq. with hot and cold TCR of 225 and 470 ppm/° C respectively, whereas the same composition gives 1.2 k Ohm/sq., 16.5 k Ohm/sq. and 0.7 k Ohm/sq. for co-fired, post-fired resistors on LTCC and buried resistors, respectively. The hot (HTCR) and cold (CTCR) values were evaluated; HTCR = 190 ppm/° C and CTCR = 314 ppm/°C were found for co-fired structures; HTCR = 216 ppm/degrees C and CTCR = 205 ppm/°C for post-fired samples and HTCR = 520 ppm/°C and CTCR = 350 ppm/° C for buried in LTCC structures
New thick-film material for piezoresistive sensors
No full textIrO2-based resistors were prepared with the standard methods of thick-film technology and their electrical properties were studied in order to identify the best composition for piezoresistors suitable for sensors to be operated continuously at temperatures exceeding 150 degreesC. The obvious criterion was to minimise the temperature coefficient of resistance (TCR) and the temperature coefficient of the gauge factor (TCGF), with minimum shift of the resistance in long term high temperature operation, without sacrificing the gauge factor (GF). The results achieved include resistors with sheet resistance lower than 100 k Omega/square; TCR values lower than 250 ppm/degreesC over the temperature range from -40 to 200 degreesC and lower than 100 ppm/degreesC from 25 to 200 degreesC; GF approximate to 7-10; TCGF approximate to -130 ppm/degreesC; relative change of resistance DeltaR/R < 0.1% after ageing at 150 degreesC for 1000 h. Performance characteristics, studied in the temperature range of 25-175 degreesC, of a gauge pressure sensor exploiting IrO2 piezoresistors are reported. (C) 2001 Elsevier Science B.V. All rights reserved
“Microstructure and electrical properties of perovskite Ruthenate-based Lead Free Thick-Film Resistors on alumina and LTCC”
No full textCaRuO3 perovskite-based lead-free thick-film resistors (TFRs) were prepared on 96%-alumina and Low Temperature Co-fired Ceramic (LTCC) substrates. The microstructure evolution, possible interactions, and electrical properties of resistors were studied. The hot and cold TCR values of all the resistors were measured in the temperature range (+20 to +120°) and (+20 to -120°), respectively. TFRs with 25% by volume of CaRuO3 on alumina exhibit a sheet resistance Rs = 5kohm/sq. with hot and cold TCR of 225 and 470 ppm/ C, respectively, whereas the same composition gives 1.2 kohm/sq., 16.5 kohm/sq. and 0.7 kohm/sq. for co-fired, post-fired resistors on LTCC and buried resistors, respectively. The hot (HTCR) and cold (CTCR) values were evaluated; HTCR = 190 ppm/ °C and CTCR = 314 ppm/ °C were found for co-fired structures; HTCR = 216 ppm/ °C and CTCR = 205 ppm/ °C for post-fired samples and HTCR = 520 ppm/ °C and CTCR = 350 ppm/ °C for buried in LTCC structures
Microstructure and elelectrical propperties of perovskite ruthenate-based lead free thick-film resistors on alumina and LTCC.
No full textCaRuO3, perovskite-based lead-free thick-film resstors were processed on 96%-alumina and Low Temperature Co-fired Ceramic (LTCC) substrates. The microstructure evolution, possible interaction and electrical properties of resistors were ivestigated. TFR with 25% by vol. of ruthenate on alumina exhibit a sheet resistance Rs=5 KOhm/sqwith hot and cold TCR of 225 and 470 ppm/degree C respectively, whereas the same composition gives 1.2 KOhm/sq and 16.5 KOhm/sq. for cofired and postfired samples, respectively, on LTCC, wuth hot and cold TCR of 190 and 314 ppm/degreeC for co-fired structures, and 216 and 250-ppm/degreeC for post-fired LTCC structires
IrO2-based thick-film piezoresistors for pressure sensors
No full textThe subject concerns thick-film resistors whose conductive component is based on IRO2 grains. TCR and Gauge factor values are reported together with a resistors application as sensing elements for pressure sensors
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