Results 51 to 60 of about 278,505 (211)

Correct light deflection in Weyl conformal gravity

open access: yes, 2013
The conformal gravity fit to observed galactic rotation curves requires {\gamma}>0. On the other hand, conventional method for light deflection by galaxies gives a negative contribution to Schwarzschild value for {\gamma}>0, which is contrary to ...
Bochicchio, Ivana   +4 more
core   +1 more source

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

open access: yes, 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

The existence spatial reasoning of preservice teacher in primary mathematics learning

open access: yesJournal of Educational Studies, 2023
Spatial reasoning is an ability related to the representation and use of objects and their relationships in the 2D and 3D worlds. This research examines the spatial reasoning’ of pre-service teacher primary education and its use in their course.
Lingga Nico Pradana
doaj   +2 more sources

A neural circuit for angular velocity computation

open access: yesFrontiers in Neural Circuits, 2010
In one of the most remarkable feats of motor control in the animal world, some Diptera, such as the housefly, can accurately execute corrective flight maneuvers in tens of milliseconds.
Samuel B Snider   +2 more
doaj   +1 more source

A Mathematical Model for Rotating Biological Contactors

open access: yesWater Science and Technology, 1990
A mathematical model for aerobic and anoxic degradation of organic components as well as nitrification in RBC systems is developed and verified against experimental experience after primary, secondary and tertiary treatment. The model considers biomass distribution within the biofilm as well as along a reactor chain.
M. Boller, W. Gujer
openaire   +1 more source

Nielsen realization for infinite-type surfaces

open access: yes, 2020
Given a finite subgroup G of the mapping class group of a surface S, the Nielsen realization problem asks whether G can be realized as a finite group of homeomorphisms of S.
Afton, Santana   +3 more
core  

Simple realizability of complete abstract topological graphs simplified

open access: yes, 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

The Stability of Boats: A Science, Technology, Engineering, and Mathematics (STEM) Exercise [PDF]

open access: yes, 2015
In what might be called genuine Science, Technology, Engineering, and Mathematics (STEM), an engineering construct subject to well-understood physical principles is analyzed mathematically to yield predicted behavior.
Rublein, G.
core   +1 more source

Development of Ethnomathematics-Based Student Worksheets to Improve Conceptual Understanding

open access: yesJournal of Mathematics Instruction, Social Research and Opinion
Conceptual understanding is essential in geometry, yet many students struggle with rotation concepts due to a lack of contextual learning materials. This study aims to develop ethnomathematics-based student worksheets (LKPD) by integrating the Serampang
Nurul Ain Asnawati, Rusi Ulfa Hasanah
doaj   +1 more source

Simone Weil\u27s Spiritual Critique of Modern Science: An Historical-Critical Assessment [PDF]

open access: yes, 2008
This paper evaluates Simone Weil\u27s philosophy and theology of science from the perspective of an historical phenomenology of ...
Cosgrove, Joseph K.
core   +1 more source

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