Results 91 to 100 of about 1,898,335 (295)

EDITORIAL V.5, N.1 - EDUCAÇÃO DO CAMPO: CONTRIBUIÇÕES DA EDUCAÇÃO MATEMÁTICA E DA TECNOLÓGICA

open access: yesEm Teia, 2014
A edição n. 1, v. 5, 2014 da Revista EM TEIA traz a público um conjunto de textos que objetiva contribuir para ampliação e aprofundamento da discussão de pesquisas que investigam aspectos dos processos de Educação Matemática e Tecnológica desenvolvidas ...
Carlos Eduardo Ferreira MONTEIRO   +1 more
doaj   +1 more source

Enhancing Corrosion Resistance and Mechanical Strength of 3D‐Printed Iron Polylactic Acid for Marine Applications via Laser Surface Texturing

open access: yesAdvanced Engineering Materials, EarlyView.
Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat   +6 more
wiley   +1 more source

PEMBELAJARAN GARIS LURUS DENGAN MODEL ELICITING ACTIVITIES DAN TEAM ASSISTED INDIVIDUALIZATION DITINJAU DARI GAYA KOGNITIF

open access: yesJurnal E-DuMath, 2015
The aims of the research were to determine to the effect of learning models on mathematics achievement viewed from students cognitive style. The learning model compared were model elicting activities, team assisted Individualition, and direct instruction.
author Ari Suningsih
doaj   +1 more source

Mathematical definition of quantum field theory on a manifold [PDF]

open access: yesarXiv, 2009
We give a mathematical definition of quantum field theory on a manifold, and definition of quantization of a classical field theory given by a variational principle.
arxiv  

Geometry‐Based Scan Curve Analysis: Rapid Method for the Evaluation of Scan Strategies in Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
This study presents rapid evaluation methods for scan strategies in powder bed fusion (PBF) of polymers with a NIR laser as an example for its application. It uses line buffer‐based calculations and point density fields to predict the performance of four different scan strategies. The methods show promising results in laser‐based PBF of polymer samples,
Simon Leupold   +9 more
wiley   +1 more source

A critical analysis of the philosophical motivations and development of the concept of the field of rationality as a representation of the fundamental ontology of the physical reality

open access: yesZagadnienia Filozoficzne w Nauce, 2022
The unusual applicability of mathematics to the description of the physical reality still remains a major investigative task for philosophers, physicists, mathematicians and cognitive scientists.
Wojciech Grygiel
doaj  

A-D-E Classification of Conformal Field Theories

open access: yes, 2009
The ADE classification scheme is encountered in many areas of mathematics, most notably in the study of Lie algebras. Here such a scheme is shown to describe families of two-dimensional conformal field theories.Comment: 19 pages, 4 figures, 4 tables ...
Cappelli, Andrea, Zuber, Jean-Bernard
core   +2 more sources

Environmentally Stable and Highly Crystalline MXenes for Multispectral Electromagnetic Shielding up to Millimeter Waves

open access: yesAdvanced Functional Materials, EarlyView.
This study presents excellent EMI shielding effectiveness of highly crystalline HC‐Ti3C2Tx MXene, characterized by high electrical conductivity, outstanding environmental stability, and facile processability, across a multispectral frequency range from 100 kHz to 110 GHz. It is revealed that increasing the thickness and electrical conductivity of MXene
Aamir Iqbal   +13 more
wiley   +1 more source

Euclidean Field Theory [PDF]

open access: yesarXiv, 2005
A coincise review about Euclidean (Quantum) Field Theory is presented. It deals with the general structural properties, the connections with Quantum Field Theory, the exploitation in Constructive Quantum Field Theory, and the physical interpretation.
arxiv  

Facile Synthesis of CuxS Electrocatalysts for CO2 Conversion into Formate and Study of Relations Between Cu and S with the Selectivity

open access: yesAdvanced Functional Materials, EarlyView.
Copper sulfide based electrocatalysts for CO2 conversion are selective for production of formate as major product. Transformations under electrochemical conditions result in significant sulfur loss, and this study examines the nature of how persistent, residual sulfur (observed as surface SO42– species and S dissolved in the electrolyte) can sustain ...
Sasho Stojkovikj   +8 more
wiley   +1 more source

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