Results 91 to 100 of about 76,108 (299)

On Constructive Axiomatic Method [PDF]

open access: yes, 2014
In this last version of the paper one may find a critical overview of some recent philosophical literature on Axiomatic Method and Genetic Method.Comment: 25 pages, no ...
Rodin, Andrei
core   +7 more sources

On the Influence of Antioxidants and Recycled MgO–C Source Material on the Mechanical Properties of Carbon‐Bonded Magnesia Refractories

open access: yesAdvanced Engineering Materials, EarlyView.
The presented study focuses on the fracture behaviour of carbon‐bonded magnesia MgO–C refractories, where environmentally friendly fructose, collagen and lignin serve as temporary binding agents. The partial substitution of the source material with recycled MgO–C reduces the fracture resistance, which can be counteracted by the additional introduction ...
Marc Neumann   +6 more
wiley   +1 more source

The Methodological Analysis of the Plato’s Doctrine About Space and the Person in Dialogue “Timaeus” [PDF]

open access: yesФилософия и космология, 2016
The paper focus is on the main methodological sets of Plato which substantially influenced his philosophic and scientific thinking, expressed in the dialogue ‘Timaeus’, as well as defined the specific of his doctrine in relation to the cosmos and human ...
Viacheslav Meshkov
doaj  

An Exploration of Learners’ Understanding of Euclidean Geometric Concepts: A Case Study of Secondary Schools in the OR Tambo Inland District of the Eastern Cape [PDF]

open access: yesE-Journal of Humanities, Arts and Social Sciences
A major concern in South Africa is the poor performance of learners in mathematics, particularly in geometry. This paper therefore sought to explore the learners’ understanding of Euclidean geometric concepts.
Thabisa Maqoqa
doaj   +1 more source

Effect of Laser Deoxidation on Adhesive‐Bonded Aluminum in an Oxygen‐Free Atmosphere

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates laser ablation of aluminum under oxygen‐free conditions. The goal is to produce oxide‐free substrates that enable improved adhesive bonding with epoxy. Optimized laser parameters (90% overlap, 300 µJ) combined with oxide‐free substrates result in the highest tensile strength of the adhesive bond.
Sandra Gerland   +5 more
wiley   +1 more source

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

open access: yesAdvanced 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   +6 more
wiley   +1 more source

Primary school students’ problem-solving strategies in creating artworks with GeoGebra

open access: yesLUMAT
Computational thinking (CT) as a problem-solving skill has been argued to be an essential skill for all learners. Accordingly, there have been efforts to formalize and operationalize CT within school curricula in various countries.
Wahid Yunianto   +4 more
doaj   +1 more source

Proses Berpikir Siswa Field Dependent dalam Menyelesaikan Masalah Geometri Berdasarkan Tahapan Polya

open access: yesJurnal Pendidikan: Teori, Penelitian, dan Pengembangan, 2019
: This study aims to describe the thinking process of field dependent students in solving geometric problems based on the Polya stage. The type of research used was descriptive qualitative.
Agus Hidayat   +2 more
doaj   +1 more source

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

open access: yesAdvanced 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   +3 more
wiley   +1 more source

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