118,306 research outputs found
Supplementary materials to "Routine and adaptive experts: Individual characteristics and their impact on multidigit arithmetic strategy flexibility and mathematics achievement"
No full textSupplementary materials to: Jóelsdóttir, L. B., Sunde, P. B., Sunde, P., & Andrews, P. (2024). Routine and adaptive experts: Individual characteristics and their impact on multidigit arithmetic strategy flexibility and mathematics achievement. Journal of Numerical Cognition, 10, Article e14081. https://doi.org/10.5964/jnc.14081The Supplementary Materials contain supplementary results, including tables with results by grade level.unknownunknow
Predicting fretting fatigue in engineering design
No full textThe progress in fretting fatigue understanding and predictability is reviewed, with engineering applications in mind. While industrial assessments often relies on simple empirical parameters, research in fretting fatigue should allow the design engineer to improve confidence in the fretting fatigue analysis.
Fretting fatigue cracks often form in multiaxial stress fields with severe gradients under the contact area, and are inherently difficult to predict.
By describing the fretting stress gradients using comparisons with the mechanical fields surrounding cracks and notches, crack nucleation threshold conditions and finite life can efficiently be determined. Also, non-local stress intensity multipliers provide promising tools for the industrial finite element analysis, often involving complex geometries and loading conditions.
The use of multiaxial fatigue criteria to determine fretting fatigue nucleation life is also reviewed. Researchers have shown that critical plane calculations with some stress-averaging method can predict fretting fatigue crack initiation. However, the frictional interface causes non-proportional loading paths, and the application of critical plane methods is not straight forward
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
Square Dancing with the Stars to Enhance Dynamic Hirschman Linkages?
No full textIn this Presidential Address, the author takes the reader on a reconnaissance of his life and time as a regional scientist. He points out scenery he found scintillating along the way, hoping that some may pick up the banner and chew on a few of the ideas for a while. He suggests a revisit to Albert O. Hirschman’s notion of key sectors and more empirical analysis related to Marcus Berliant’s and Masahisa Fujita’s notion of knowledge creation and transfer.Presidential Address, San Antonio, Texas, March 29, 2014 (53rd Meetings of the Southern Regional Science Association
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Økotoksikologisk undersøkelse av prosessavløpsvann fra Brødr. Sunde AS
No full textProsessavløpsvann fra produksjon av polystyren ved Brødr. Sunde AS i Spjelkavik er blitt undersøkt mht. toksiske effekter på alger og dafnier, samt innhold av potensielt bioakkumulerbare organiske forbindelser. Toksisitetstesten men grønnalgen Selenastrum capricornutum viste at veksten ble hemmet ved konsentrasjoner over ca. 3.2%. EC50-verdien var ved 9.2% avløpsvann. Vannloppen Daphnia magna var mindre følsom med EC50-verdi ved 41% avløpsvann. Innholdet av potensielt bioakkumulerbare forbindelser ble undersøkt ved tynnsjiktkromatografering og gasskromatografi. Det ble påvist ca. 1 mg/l stoff med log Pow>3.8. Det ble konstatert at den potensielt bioakkumulerbare fraksjonen innholdt bromerte forbindelser, trolig hexabromcyklododecan som brukes som flammehemmer ved produksjonen av polystyren. Sammenligning mellom filtrert og ufiltrert prøve viste at de bromerte og bioakkumulerbare organiske forbindelsene var knyttet til den partikulære fraksjonen av avløpsvannet
Amyloid fibril formation by bovine milk k-Casein and its inhibition by the molecular chaperones alphaS- and beta-Casein
No full textCopyright © 2005 American Chemical SocietyDavid C. Thorn, Sarah Meehan, Margaret Sunde, Agata Rekas, Sally L. Gras, Cait E. MacPhee, Christopher M. Dobson, Mark R. Wilson, and John A. Carve
Letter from unknown writer to Jesse L. Boyce
No full textLetter to Jesse L. Boyce from unknown author (possibly Jack) about the investigation into the powder magazine located in the Grand Canyon. Some personal news is included in the letter such as the writer's marriage to the daughter of C.A. Taylor, former Supervisor of Cochise County
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