Results 41 to 50 of about 277,866 (307)

X‐Ray Tomography Analysis of Damage Mechanisms in Metal Matrix Syntactic Foams During Compression

Advanced Engineering Materials, EarlyView.
In situ synchrotron X‐ray tomography is used to investigate the internal damage mechanisms of AlSi12 metal matrix syntactic foam with ceramic hollow spheres during compressive loading. It is concluded that a homogeneous distribution of the second‐phase filler material results in a sequential collapse in a localized region; this leads to controlled and ...
Indrajeet Tambe, János Endre Maróti, Imre Norbert Orbulov, Zoltan Hegedűs, Markus Ziehmer, Carl E. Krill III, Håkan Hallberg, Pär A. T. Olsson, Johan Hektor   +8 more
wiley   +1 more source

Exploring mathematical values held by high school mathematics teachers

Discover Education
This study explored mathematical values espoused by senior high school (SHS) mathematics teachers in mathematics teaching and learning in a municipality in Ghana. To achieve this aim, we employed an explanatory sequential mixed methods design.
Esenam Dorwu, Francis Kwadwo Awuah, Patrick Kyeremeh   +2 more
doaj   +1 more source

Sex Differences in the Performance of 7–12 Year Olds on a Mental Rotation Task and the Relation With Arithmetic Performance

Frontiers in Psychology, 2019
This study evaluates boy-girl differences in 3D mental rotation in schoolchildren aged 7–12 years and the relation to arithmetic performance. A dedicated new task was developed: The Mental Rotation Task – Children (MRT-C).
Marleen van Tetering, Marthe van der Donk, Renate Helena Maria de Groot, Jelle Jolles   +3 more
doaj   +1 more source

Geometry in the Transition from Primary to Post-Primary [PDF]

, 2014
This article is intended as a kind of precursor to the document Geometry for Post-primary School Mathematics, part of the Mathematics Syllabus for Junior Certicate issued by the Irish National Council for Curriculum and Assessment in the context of ...
Barry, Patrick D., O'Farrell, Anthony G.
core   +1 more source

Symmetry and rotation skills of prospective elementary mathematics teachers [PDF]

Bolema: Boletim de Educação Matemática, 2014
The aim of this study was to investigate the skills and deficiencies of senior university students enrolled in a mathematics education program with the concepts of symmetry and rotation of geometric figures. The study was conducted with 32 prospective teachers in the Department of Education at a public university located in Western Turkey.
Turgut, Melih, Yenilmez, Kürşat, Anapa, Pınar   +2 more
openaire   +4 more sources

Experimental Analysis and Physics‐Based Analytical Model on Twisted and Coiled Artificial Muscles

Advanced Engineering Materials, EarlyView.
Twisted and coiled artificial muscles made from silver‐coated nylon fibers are investigated through experiments and analytical modeling. The actuators achieve contractions up to 19.3% and specific work of 8 kJ kg−1, though efficiency remains limited (≈0.15%) by thermal losses.
Salvatore Garofalo, Chiara Morano, Leonardo Pagnotta, Luigi Bruno   +3 more
wiley   +1 more source

A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions

Advanced Engineering Materials, EarlyView.
This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice, Krzysztof S. Stopka, Michael D. Sangid   +2 more
wiley   +1 more source

“It’s Different for Girls!” The Role of Anxiety, Physiological Arousal, and Subject Preferences in Primary School Children’s Math and Mental Rotation Performance

Behavioral Sciences
(1) Background: This study examines the role of subjective anxiety (mathematics and spatial anxiety), along with physiological responses, in mathematics or math and mental rotation performance in 131 German primary school students (65 girls, 66 boys ...
Michelle Lennon-Maslin, Claudia Michaela Quaiser-Pohl   +1 more
doaj   +1 more source

Pengembangan Metode Diskusi Bermuatan Presentasi Sistem Rotasi Pada Mata Kuliah Trigonometri

Journal of Medives: Journal of Mathematics Education IKIP Veteran Semarang, 2019
Penelitian ini merupakan penelitian pengembangan dalam bidang pembelajaran, yakni pengembangan metode diskusi menjadi metode diskusi yang bermuatan presentasi sistem rotasi.
Ferdinandus Ardian Ali, Emilianus Jehadus, Sebastianus Fedi   +2 more
doaj   +1 more source

Simple realizability of complete abstract topological graphs simplified

, 2019
An abstract topological graph (briefly an AT-graph) is a pair $A=(G,\mathcal{X})$ where $G=(V,E)$ is a graph and $\mathcal{X}\subseteq {E \choose 2}$ is a set of pairs of its edges.
Kynčl, Jan
core   +1 more source