11,943 research outputs found
A contribution to the debate on the resistance-temperature characteristics of thick-film resistor materials
No full textThe almost parabolic resistance–temperature characteristic shown by a thick-film resistor material (Heraeus 8241), printed on an alumina substrate, is explained in terms of thermal expansion effects in the x, y and z directions between 77 and 535 K. The piezoresistive equation is used to strip the thermal expansion contribution from the almost parabolic resistance–temperature characteristic, leaving a near linear resistance–temperature characteristic. It is suggested that the point of inflection on the resistance–temperature characteristic is primarily due to the non-linear temperature coefficient of expansivity of alumin
The electrical response of thick-film resistors to hydrostatic pressure and uniaxial stress between 77 and 535 K
No full textThe longitudinal gauge factor for a thick-film resistor material (Heraeus 8241) printed on an alumina substrate is found to be 12.6 at 295 K. The piezoresistive coefficient G, the unit change in resistivity per unit change in strain is 19.5, with a negative temperature coefficient of ?0.00335 K?1, measured between 77 and 535 K. Thick-film resistors of different geometry were subject to hydrostatic pressure, and by the use of the piezoresistive equation based on elastic theory, and elastic modulus data for Heraeus 8241, G was calculated and found to be 19.7 at 295 K, thus validating the piezoresistive equations and the elastic modulus value for Heraeus 8241. Hydrostatic pressure tests at elevated temperature were believed to be subject to some error, 10% at 500 K, due to adiabatic heating effects. However, it is apparent that resistance change can be predicted with a knowledge of strain in the x, y and z axes. This will prove useful for thick-film strain sensor design, where the thick-film resistor is simultaneously stressed in more than one direction
SHEPHERD SCHOOL PERCUSSION ENSEMBLE CHRISTINE WU guest electric violinist Thursday, November 17, 2005 8:00 p.m. Stude Concert Hall
No full textPlaylist: Ku-ka-ilimoku / Christopher Rouse (b. 1949) -- Raptures of Undream / Bruce Hamilton (b. 1961) -- Omphalo Centric Lecture / Nigel Westlake (b. 1958) -- LEX / Michael Daugherty (b. 1954) -- Rock and Roll Variations (on Paganini) / William Hill (b. 1954) -- Celtic Drumline / Arthur Gottschalk (b. 1952)
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
David Hill speaking at the National Library of Australia, Canberra, 23 October 2012, 1 /
No full textTitle devised by cataloguer from information supplied by photographer.; Part of the collection: Author talk with David Hill at the National Library of Australia, Canberra, 23 October 2012; Acquired in digital format; access copy available online.; Mode of access: Online.; Photographed by a staff member of the National Library of Australia
David Hill speaking at the National Library of Australia, Canberra, 23 October 2012, 2 /
No full textTitle devised by cataloguer from information supplied by photographer.; Part of the collection: Author talk with David Hill at the National Library of Australia, Canberra, 23 October 2012; Acquired in digital format; access copy available online.; Mode of access: Online.; Photographed by a staff member of the National Library of Australia
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
'Resting' and 'Fremantle Terzinas' Poems by author Hersri Setiawan (Translation into English by David T. Hill)
No full textIn late February 1993, Indonesian author Hersri Setiawan arrived for a brief visit to Australia to participate in the Perth Writers' Festival at the Fremantle Arts Centre. A former political prisoner held for nine years in detention without trial, he managed to leave Indonesia several years ago and now lives in the Netherlands as a political exile. These poems have been translated by David T. Hill
Near Wall PIV-Measurements on the Windward Slope of a Hill
No full textThe turbulent flow over periodic hills was measured near to the wall, using planar Particle-Image-Velocimetry (PIV) at high spatial resolution. Our focus is on the near wall turbulence structure on the windward slope of the hill. For large-eddy simulation (LES) we suspect that, if this was not predicted accurately, it affects the prediction of the velocity profiles over the hill crest which in turn will affect the recirculation length downstream of the hill. Regarding the time averaged velocities, we were able to resolve the linear viscous region of the boundary layer. The velocity distribution and also the Reynolds stress does not comply with the law of the wall as it is valid for a turbulent boundary layer at equilibrium
Autograph of Anita Hill in "Speaking Truth to Power"
No full textThe title page and an autograph by the author, Anita Hill, in their work ""Speaking Truth to Power"
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