Results 41 to 50 of about 4,755,624 (270)

Comparative cognition of number and space: the case of geometry and of the mental number line

open access: yesPhilosophical Transactions of the Royal Society B: Biological Sciences, 2018
Evidence is discussed about the use of geometric information for spatial orientation and the association between space and numbers in non-human animals.
G. Vallortigara
semanticscholar   +1 more source

Impact of Fjord Geometry on Grounding Line Stability

open access: yesFrontiers in Earth Science, 2018
Recent and past retreat of marine-terminating glaciers are broadly consistent with observed ocean warming, yet responses vary significantly within regions experiencing similar ocean conditions. We assess how fjord geometry modulates glacier response to a
Henning Åkesson   +3 more
doaj   +1 more source

Penggunaan Etnomatematika Pada Batik Paoman Dalam Pembelajaran Geomteri Bidang di Sekolah Dasar

open access: yesIndoMath, 2018
This study aims to explore the ethnomatematics contained in Batik Paoman Indramayu and apply it to the learning of geometry field in elementary school. This research is a qualitative research with ethnography approach, where the data collection technique
Sudirman Sudirman   +2 more
doaj   +1 more source

The conic geometry of rectangles inscribed in lines [PDF]

open access: yesProceedings of the American Mathematical Society, 2021
Final version. To appear in Proc.
Bruce Olberding, Elaine A. Walker
openaire   +3 more sources

Type synthesis of 4-DOF parallel kinematic mechanisms based on Grassmann line geometry and atlas method

open access: yes, 2013
Many methods are proposed to deal with the type synthesis of parallel kinematic mechanisms(PKMs), but most of them are less intuitive to some extent. Thus, to propose a concise and intuitive type synthesis method for engineering application is a very ...
F. Xie, Tiemin Li, Xinjun Liu
semanticscholar   +1 more source

Covariant Space-Time Line Elements in the Friedmann–Lemaitre–Robertson–Walker Geometry

open access: yesAxioms, 2022
Most quantum gravity theories quantize space-time on the order of Planck length (ℓp ). Some of these theories, such as loop quantum gravity (LQG), predict that this discreetness could be manifested through Lorentz invariance violations (LIV) over ...
David Escors, Grazyna Kochan
doaj   +1 more source

Integral geometry of pairs of hyperplanes or lines

open access: yesArchiv der Mathematik, 2020
AbstractCrofton’s formula of integral geometry evaluates the total motion invariant measure of the set of k-dimensional planes having nonempty intersection with a given convex body. This note deals with motion invariant measures on sets of pairs of hyperplanes or lines meeting a convex body. Particularly simple results are obtained if, and only if, the
Hug, Daniel, Schneider, Rolf
openaire   +5 more sources

On-Line Reconstruction of CAD Geometry [PDF]

open access: yes2013 International Conference on 3D Vision, 2013
In reverse engineering and computer-aided design (CAD) applications point cloud data is usually manually scanned, reconstructed, and post-processed in separated steps. When point cloud data resulting from a scanning process do not satisfy certain necessary reconstruction requirements, one must perform scanning again to enable proper reconstruction.
Daniel Hagel   +4 more
openaire   +2 more sources

THE EFFECT OF THE EUCLIDEAN GEOMETRY SHORT LEARNING PROGRAMME USING THE WORKED-OUT EXAMPLES TEACHING APPROACH ON MATHEMATICS TEACHERS' PERFORMANCE

open access: yesJOHME: Journal of Holistic Mathematics Education, 2022
The studies on the worked-out examples teaching approach (WOETA) have been investigated globally and in South Africa, showing gains in learners' performance. This study reports on the Euclidean geometry short learning programme (EGSLP), which used worked-
Msebenzi Rabaza, Joleen Hamilton
doaj   +1 more source

Multicolored lines in a finite geometry

open access: yesDiscrete Mathematics, 1988
AbstractLet t>1, let P1,…,Pt be pairwise disjoint nonvoid subsets of a finite set P, and let L be a collection of subsets of P called lines. We say that (P1,…,Pt;L) is a colored incidence structure if (i) each line meets at least two blocks Pi and Pj, (ii) for arbitrary distinct xϵPi and yϵPj the pair {x, y} is a subset of exactly one line if i≠j and ...
Zoltán Füredi, Ivo G. Rosenberg
openaire   +2 more sources

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