Results 51 to 60 of about 10,834,928 (363)

A functional interpretation for nonstandard arithmetic [PDF]

Annals of Pure and Applied Logic, 2012
We introduce constructive and classical systems for nonstandard arithmetic and show how variants of the functional interpretations due to Goedel and Shoenfield can be used to rewrite proofs performed in these systems into standard ones. These functional interpretations show in particular that our nonstandard systems are conservative extensions of ...
van den Berg, B., Briseid, E., Safarik, P.   +2 more
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The influence of cardiorespiratory fitness on strategic, behavioral, & electrophysiological indices of arithmetic cognition in preadolescent children

Frontiers in Human Neuroscience, 2014
The current study investigated the influence of cardiorespiratory fitness on arithmetic cognition in forty 9-10 year old children. Measures included a standardized mathematics achievement test to assess conceptual and computational knowledge, self ...
Robert D Moore, Eric S. Drollette, Mark R Scudder, Aashiv eBharij, Charles H Hillman   +4 more
doaj   +1 more source

Arithmetic properties of the Herglotz function

Journal für die reine und angewandte Mathematik (Crelles Journal), 2023
AbstractIn this paper we study two functionsF⁢(x){F(x)}andJ⁢(x){J(x)}, originally found by Herglotz in 1923 and later rediscovered and used by one of the authors in connection with the Kronecker limit formula for real quadratic fields. We discuss many interesting properties of these functions, including special values at rational or quadratic ...
Radchenko, D., Zagier, D.
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Cortical oxygen consumption in mental arithmetic as a function of task difficulty: a near-infrared spectroscopy approach

Frontiers in Human Neuroscience, 2013
The present study investigated changes in cortical oxygenation during mental arithmetic using near-infrared spectroscopy (NIRS). Twenty-nine male volunteers were examined using a 52-channel continuous wave system for analyzing activity in prefrontal ...
Martin Verner, M. Herrmann, S. Troche, Claudia M. Roebers, T. Rammsayer   +4 more
semanticscholar   +1 more source

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur, Faruk Kaya, Bora Derin, Mustafa Lütfi Öveçoğlu, Ju Li, Duygu Ağaoğulları   +5 more
wiley   +1 more source

Arithmetic Errors in Financial Contexts in Parkinson’s Disease

Frontiers in Psychology, 2021
Research on dyscalculia in neurodegenerative diseases is still scarce, despite high impact on patients’ independence and activities of daily living function.
Hannah D. Loenneker, Sara Becker, Susanne Nussbaum, Hans-Christoph Nuerk, Inga Liepelt-Scarfone, Inga Liepelt-Scarfone, Inga Liepelt-Scarfone   +6 more
doaj   +1 more source

A Novel Approach to Produce Metal–Metal Composites by Leveraging Immiscibility: Laser Powder Bed Fusion of Nanosilver‐Dispersed Titanium

Advanced Engineering Materials, EarlyView.
Incorporating nanosized silver into titanium for antimicrobial materials exploits the metastable miscibility gap between silver and titanium. Silver nanoparticles are synthesized via pulsed laser ablation in liquid. Silver addition refines the microstructure, increases hardness by 30%, and reduces Staphylococcus capitis microbial adhesion by 70%, with ...
Hamed Shokri, Silja‐Katharina Rittinghaus, Janett Schmelzer, Jessica Bertrand, Bilal Gökce   +4 more
wiley   +1 more source

Comparative Wear and Friction Analysis of Sliding Surface Materials for Hydrostatic Bearing under Oil Supply Failure Conditions

Advanced Engineering Materials, EarlyView.
Hydrostatic bearings excel in high‐precision applications, but their performance hinges on a continuous external supply. This study evaluates various material combinations for sliding surfaces to mitigate damage during supply failures or misalignment and to discover the most effective materials identified for enhancing the reliability and efficiency of
Michal Michalec, Lukáš Daněk, Jan Foltýn, Petr Svoboda, Carsten Gachot, Martin Hartl, Ivan Křupka   +6 more
wiley   +1 more source

The effect of interictal epileptiform discharges on cognitive and academic performance in children with idiopathic epilepsy

BMC Neurology, 2020
Background Interictal epileptiform discharges (IEDs) have been proven to impair cognitive function. However, it is not clear whether IEDs disrupt academic performance in children with idiopathic epilepsy, and the contribution of cognitive function ...
Dazhi Cheng, Xiuxian Yan, Keming Xu, Xinlin Zhou, Qian Chen   +4 more
doaj   +1 more source

The Arithmetic of Hyperbolic Functions [PDF]

Nature, 1911
THROUGHOUT the books treating of hyperbolic functions, although elaborate series for their determination are given, the possibility of calculating them directly from their definitions, by means of common logarithms, is never suggested, and it would appear, therefore, that the merits of the direct method are insufficiently recognised.
openaire   +2 more sources