Results 101 to 110 of about 160,573 (296)

Investigation of Thermo‐Chemical Processes in Commercial MgO‐C Refractory Bricks With and Without MgO‐C Recyclate at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This study investigates thermo‐chemical processes during high‐temperature testing of two commercial MgO‐C brick grades, one containing 47.5 wt.% MgO‐C recyclate. Using ETV, DTA/TG‐MS, XRD, and SEM/EDS/EBSD, mechanisms such as carbothermal reduction of magnesia, impurity incorporation into the secondary MgO surface layer, and calcium‐rich phase ...
Alexander Schramm, Jana Hubálková, Christian Schimpf, Thomas Schemmel, Christos G. Aneziris, Anja Weidner, Horst Biermann   +6 more
wiley   +1 more source

Informal Geometry in the Preparation of Teachers: A New Mathematics Course at the University of Virginia [PDF]

, 1999
Students require a rich variety of hands-on geometric experiences before they progress to more formal traditional geometric instruction. This fact has often been ignored in the mathematics preparation of today’s teachers.
Pitt, L. D.
core   +1 more source

Combined Process‐ and Phase‐Field‐Simulation to Predict the Microstructure of Single‐Crystal Ni‐Based Superalloys

Advanced Engineering Materials, EarlyView.
A combined finite element and phase‐field approach predicts the evolution of microstructure during the directional solidification of Ni‐based superalloys. The model reveals how withdrawal rate, temperature gradient, and wall thickness control the dendrite spacing, highlighting the strong effect of surface regions in thin sections where dendrite growth ...
Sean Böhm, André B. Baldissera, Rainer Völkl, Uwe Glatzel   +3 more
wiley   +1 more source

THE USE OF TWISTED SURFACES AS A SOURCE OF INSPIRATION IN ARCHITECTURAL CONCEPTS

Journal of Industrial Design and Engineering Graphics, 2022
In the creative activity of any field we rely on scientific, technological and artistic interdisciplinarity, through which any designer manifests itself as a creative being, capable of capitalizing and enriching nature.
Ana-Maria GRAUR, Carmen MÂRZA, Georgiana CORSIUC   +2 more
doaj   +2 more sources

Students' Critical Thinking in Solving Geometric Problems

PRISMA
In the 21st century, students are expected to have abilities that are considered important to face challenges.One of the goals of the education system is to educate students to think critically. The purpose of this research is to determine the extent to which researchers analyze students' critical thinking abilities, especially in solving geometry ...
Anastia, Anastia, Nurcahyono, Novi Andri, Setiani, Ana   +2 more
openaire   +2 more sources

Thermophysical Properties of the Desulphurization Slags With Various CaS and CaO/Al2O3 Ratio

Advanced Engineering Materials, EarlyView.
This article investigates how CaS content and the CaO/Al2O3 ratio influence the thermophysical properties of desulphurization slags. Using experimental measurements and thermodynamic simulations, this study reveals complex effects on viscosity, surface tension, and density, providing new insight into slag structure and phase behavior under ...
Eldar Salpagarov, Matheus Roberto Bellé, Anton Yehorov, Julia Richter, Olena Volkova   +4 more
wiley   +1 more source

Teachers’ Experiences with Students’ Learning Obstacles in Geometric Thinking: Insights from the van Hiele Framework

International Journal of Research in Mathematics Education
Understanding geometric concepts is often a challenge for students because it requires spatial thinking and deductive reasoning skills that develop gradually.
Nur'aini Muhassanah, Muhammad 'Azmi Nuha, Riski Aspriyani   +2 more
doaj   +1 more source

The mobile Boolean model: an overview and further results [PDF]

, 2014
This paper offers an overview of the mobile Boolean stochastic geometric model which is a time-dependent version of the ordinary Boolean model in a Euclidean space of dimension $d$.
Konstantopoulos, Takis
core   +2 more sources

Population of Nonmetallic Inclusions in Liquid High‐Silicon Electrical Steel in Contact With MgO–C Refractories Based on Recyclates and Environmentally Friendly Binders

Advanced Engineering Materials, EarlyView.
The formation of nonmetallic inclusions (NMIs) was investigated in this study, carrying out immersion tests for 30 min at a temperature of 1600°C with liquid high‐silicon electrical steel (Si ≈ 3 mass‐%) and different MgO–C refractories. Conventional MgO–C refractories were considered, as well as MgO–C refractories containing MgO–C recyclate and ...
Lukas Neubert, Matheus Roberto Bellé, Florian Kerber, Dinesh Kumar Gunasekar, Hans‐Jörn Weddige, Christos G. Aneziris, Olena Volkova   +6 more
wiley   +1 more source

A creative geometric investigation in Middle School: the case of quadrilaterals

Educação Matemática Debate
The research aimed to analyze the mathematical creativity of students in Middle School in the production of different quadrilaterals in 3×3 grids, considering the fluency, flexibility and originality of the answers.
Cristian Martins da Silva, Juliana Gabriele Kiefer, José Carlos Pinto Leivas   +2 more
doaj   +1 more source